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authorAnas Nashif <anas.nashif@intel.com>2013-02-19 08:22:18 -0800
committerAnas Nashif <anas.nashif@intel.com>2013-02-19 08:22:18 -0800
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treeddc2171273fca8b730b9c496e1b5ed3b01878577 /doc
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Imported Upstream version 1.3.2upstream/1.3.2
Diffstat (limited to 'doc')
-rw-r--r--doc/ChangeLog-2011888
-rw-r--r--doc/HACKING28
-rw-r--r--doc/Makefile.am36
-rw-r--r--doc/Makefile.in722
-rw-r--r--doc/gpgme.info156
-rw-r--r--doc/gpgme.info-16615
-rw-r--r--doc/gpgme.info-21309
-rw-r--r--doc/gpgme.texi5787
-rw-r--r--doc/gpl.texi724
-rw-r--r--doc/lesser.texi565
-rwxr-xr-xdoc/mdate-sh205
-rw-r--r--doc/module-overview.sk640
-rw-r--r--doc/stamp-vti4
-rw-r--r--doc/texinfo.tex8962
-rw-r--r--doc/uiserver.texi612
-rw-r--r--doc/version.texi4
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diff --git a/doc/ChangeLog-2011 b/doc/ChangeLog-2011
new file mode 100644
index 0000000..d6ecca7
--- /dev/null
+++ b/doc/ChangeLog-2011
@@ -0,0 +1,888 @@
+2011-12-02 Werner Koch <wk@g10code.com>
+
+ NB: ChangeLog files are no longer manually maintained. Starting
+ on December 1st, 2011 we put change information only in the GIT
+ commit log, and generate a top-level ChangeLog file from logs at
+ "make dist". See doc/HACKING for details.
+
+2011-05-12 Marcus Brinkmann <marcus@g10code.com>
+
+ * gpgme.texi (I/O Callback Example): Fix example code.
+
+ * gpgme.texi (Generating Keys): Fix OpenPGP parameters and reference
+ GPG and GPGSM manual.
+
+2010-01-05 Werner Koch <wk@g10code.com>
+
+ * gpgme.texi (Changing Passphrases): New.
+
+2009-07-21 Werner Koch <wk@g10code.com>
+
+ * uiserver.texi (UI Server Encrypt): Add --expect-sign option to
+ PREP_ENCRYPT.
+
+2009-06-16 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Result Management): New section.
+
+2009-06-16 Werner Koch <wk@g10code.com>
+
+ * gpgme.texi (Exporting Keys): Document gpgme_op_export_keys.
+ (Importing Keys): Document gpgme_op_import_keys.
+ (Data Buffer Meta-Data): Document URL encodings.
+
+2009-05-28 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Library Version Check): Document selftest error.
+ (Creating Contexts): Likewise.
+
+2009-05-18 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Encrypting a Plaintext): Document
+ GPGME_ENCRYPT_NO_ENCRYPT_TO.
+
+2009-05-05 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Engine Information): Replace path by file_name.
+
+2008-11-28 Werner Koch <wk@g10code.com>
+
+ * gpgme.texi (Listing Keys): Change description of the return
+ value to match the code. Spotted by Colin Leroy.
+
+2008-10-15 Werner Koch <wk@g10code.com>
+
+ * uiserver.texi (Miscellaneous UI Server Commands): Add option
+ --protocol to the SENDER command.
+
+2008-07-17 Werner Koch <wk@g10code.com>
+
+ * module-overview.sk: New.
+
+2008-07-04 Werner Koch <wk@g10code.com>
+
+ * gpgme.texi (Algorithms): Add a hint on symmetric only encryption.
+
+2008-06-27 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Cancellation): Document gpgme_cancel_async.
+
+2008-06-25 Werner Koch <wk@g10code.com>
+
+ * gpgme.texi (Listing Keys): Updated example to the current API.
+ Noted by Nico Schottelius.
+
+2008-06-05 Werner Koch <wk@g10code.com>
+
+ * uiserver.texi (Miscellaneous UI Server Commands): Describe
+ START_CONFDIALOG.
+
+2008-06-04 Werner Koch <wk@g10code.com>
+
+ * gpgme.texi: Use @copying command. Change license to
+ GPLv3. Include protocol specis from GpgOL and GPGEx. Minor
+ cleanups.
+
+2008-03-11 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (File Based Data Buffers): Document the need for
+ blocking operations.
+ (Callback Based Data Buffers): Likewise.
+
+2008-03-05 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Library Version Check): Rename snippet function to
+ init_gpgme.
+ (I/O Callback Example): Call it here.
+
+2008-01-28 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi: Document that data encoding affects some output data
+ objects now.
+
+2007-09-27 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Protocols and Engines): Document GPGME_PROTOCOL_UNKNOWN.
+
+2007-09-11 Werner Koch <wk@g10code.com>
+
+ * gpgme.texi (I/O Callback Example): Typo fix.
+
+2007-08-07 Werner Koch <wk@g10code.com>
+
+ * gpgme.texi (Verify): Describe chain_model.
+
+2007-07-12 Werner Koch <wk@g10code.com>
+
+ * gpgme.texi (Library Version Check): Add remark that the socket
+ layer will get initialized.
+
+2007-06-05 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Advanced Key Editing): New section.
+
+2007-05-21 Werner Koch <wk@g10code.com>
+
+ * Makefile.am (online): New target.
+
+2007-05-18 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Error Strings): Fix documentation of
+ gpgme_strerror_r.
+
+2006-11-01 Moritz Schulte <moritz@g10code.com>
+
+ * gpgme.texi (Data Buffer I/O Operations): Fixed entry for
+ gpgme_data_seek: OFFSET is not a pointer; some s/whence/offset/.
+
+2006-09-25 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Destroying Data Buffers): Clarify that
+ gpgme_data_release_and_get_mem destroys DH unconditionally.
+
+2005-03-24 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Library Version Check): Make example code compatible
+ to W32 systems.
+
+2006-06-21 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Passphrase Callback): Fix inverted condition in
+ description.
+
+2005-12-20 Werner Koch <wk@g10code.com>
+
+ * gpgme.texi (Verify): Document pka_trust.
+
+2005-12-06 Werner Koch <wk@g10code.com>
+
+ * gpgme.texi (Key Management): Updated to match the fixes for
+ subkey fingerprints and theg secret flag.
+
+2005-10-06 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Destroying Data Buffers): Document gpgme_free.
+
+2005-10-02 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Key Management): Add the new member notations of
+ gpgme_sig_key_t.
+ (Key Listing Mode): Document GPGME_KEYLIST_MODE_SIG_NOTATIONS.
+
+2005-10-01 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi: Enclose all return parameters of deftypefuns in
+ curly brackets.
+
+ * gpgme.texi (Signature Notation Data): New section.
+ (Verify): Added more about the notation data structure.
+
+2005-09-30 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Data Buffer I/O Operations, Data Buffer Meta-Data):
+ New subsections.
+
+ * gpgme.texi: Replace plaintext_filename with file_name.
+
+ * gpgme.texi (Key Management): Document is_qualified.
+
+2005-07-27 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Decrypt): Add plaintext_filename to
+ gpgme_decrypt_result_t.
+ (Verify): Likewise for gpgme_verify_result_t.
+
+2005-06-03 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Verify): Add information about new fields in
+ gpgme_signature_t.
+
+ * gpgme.texi (Decrypt): Add gpgme_recipient_t.
+
+2005-05-28 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Key Listing Mode): Fix return type of
+ gpgme_set_keylist_mode.
+ Reported by "Sergio" <ml_sergico@virgilio.it>.
+
+2005-04-28 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Included Certificates): Document
+ GPGME_INCLUDE_CERTS_DEFAULT.
+
+2005-01-12 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Engine Configuration): New section.
+ (Crypto Engine): New subsection.
+
+2004-12-07 Marcus Brinkmann <marcus@g10code.de>
+
+ * lesser.texi (Library Copying): Change from @appendixsec to
+ @appendix.
+ * gpgme.texi (Features): Change reference to GPL to one to LGPL.
+
+ * Makefile.am: Change license to LGPL.
+ (gpgme_TEXINFOS): Replace gpl.texi with lesser.texi.
+
+ * gpgme.texi: Change license to LGPL (also for documentation of
+ GPGME's license).
+ * lesser.texi: New file.
+ * gpl.texi: File removed.
+
+ * gpgme.texi (Creating Contexts): Fix cut&paste error. Reported
+ by Noel Torres <envite@rolamasao.org>.
+
+2004-09-30 Marcus Brinkmann <marcus@g10code.de>
+
+ * Makefile.am (gpgme_TEXINFOS): Remove fdl.texi.
+ * gpgme.texi: Do not include fdl.texi. Change license to GPL.
+ * fdl.texi: File removed.
+
+2004-09-29 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Key Management): Change type of keylist_mode in
+ gpgme_key_t to gpgme_keylist_mode_t.
+
+2004-09-28 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Passphrase Callback): Fix last change.
+
+2004-09-27 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Passphrase Callback): Document
+ GPG_ERR_NOT_IMPLEMENTED.
+
+ * gpgme.texi: Update copyright year for tex version.
+
+2004-07-29 Moritz Schulte <moritz@g10code.com>
+
+ * gpgme.texi (Verify): Fix gpgme_get_key example (ancient
+ force_update argument was still there).
+
+2004-06-08 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Listing Keys): Elaborate on the length restrictions
+ on search patterns.
+
+ * gpgme.texi (Decrypt and Verify): Document the NO_DATA error
+ code.
+ (Verify): Document the relationship between gpgme_op_verify_result
+ and the decrypt and verify operations.
+
+2004-05-21 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.text (Verify): Document GPG_ERR_CERT_REVOKED status.
+
+ * gpgme.texi (Decrypt): Add note about new field wrong_key_usage
+ of gpgme_decrypt_result_t.
+
+ * gpgme.texi (Key Management): Add note about new field
+ keylist_mode of gpgme_key_t.
+
+2004-04-29 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Verify): Correct type of member wrong_key_usage.
+
+2004-03-29 Moritz Schulte <moritz@duesseldorf.ccc.de>
+
+ * gpgme.texi (Verify): Fix type of gpgme_op_verify_result.
+ * gpgme.texi (Key Listing Mode): Typo fix.
+
+2004-03-23 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Library Version Check): Fix the instruction when to
+ set the locale.
+
+2004-03-03 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (I/O Callback Example Qt): New section by Marc Mutz.
+
+2004-02-24 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (cancellation): New section.
+
+2004-02-17 Werner Koch <wk@gnupg.org>
+
+ * gpgme.texi (Key Listing Mode): Doc KEYLIST_MODE_VALIDATE.
+
+2004-02-06 Moritz Schulte <mo@g10code.com>
+
+ * gpgme.texi: A couple of small fixes regarding the Largfile
+ Support section.
+
+2004-02-01 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Largefile Support): New section.
+
+2004-01-13 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Key Management): Fix exportable field.
+
+2003-12-25 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Key Management): Rename member class in
+ gpgme_key_sig_t to sig_class.
+ (Creating a Signature): Likewise for gpgme_signature_t.
+
+2003-12-23 Moritz Schulte <mo@g10code.com>
+
+ * gpgme.texi (Listing Keys): Minor clarification for
+ gpgme_get_key.
+
+2003-10-06 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Signal Handling): New section.
+
+2003-09-14 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Multi Threading): Correct documentation on memory
+ synchronization requirement.
+
+ * gpgme.texi (Locale): New section.
+ (Multi Threading): Set locale in example.
+
+2003-09-13 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Error Strings): Add gpgme_strerror_r.
+
+2003-09-13 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Multi Threading): Update documentation.
+
+2003-09-03 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Header): We don't use the assuan namespace anymore.
+ Document new thread options.
+
+2003-08-14 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Creating a Signature): Change type of member class
+ to unsigned int.
+
+2003-08-04 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Verify): Get error code from SIG->status in the code
+ for gpgme_get_sig_status.
+
+2003-07-31 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Key Management): Add can_authenticate flag.
+
+ * gpgme.texi (Listing Keys): Document GPG_ERR_AMBIGUOUS_NAME for
+ gpgme_get_key.
+
+2003-07-29 Marcus Brinkmann <marcus@g10code.de>
+
+ * Makefile.am (EXTRA_DIST): Remove variable.
+
+ * gpgme.texi (Encrypting a Plaintext): Bad passphrase is only
+ possible with symmetric encryption, change the wording to reflect
+ that.
+
+ * gpgme.texi (Creating a Signature): Document
+ GPG_ERR_UNUSABLE_SECKEY.
+
+ * gpgme.texi (Encrypting a Plaintext): Mention encrypt and sign
+ operations in result function.
+ (Creating a Signature): Likewise.
+
+2003-07-23 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Key Listing Mode): Remove word duplication.
+ (Listing Keys): Remove mentioning of force argument.
+ (Verify): Don't mention r_stat. Fix some typos.
+ (Decrypt and Verify): Correct info how to get the result. Don't
+ mention r_stat.
+ (Manipulating Data Buffers): Fix documentation of return value.
+ (Listing Keys): Update examples.
+ (Decrypt): Result might also be available when operation failed.
+ (Verify): Result might also be available when operation failed.
+ All spotted by Stéphane Corthésy.
+
+2003-07-22 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Error Sources): Fix cut and paste error.
+
+2003-07-09 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Key Management): Clarify difference between can_sign
+ and can_certify.
+ (Information About Keys): Likewise for GPGME_ATTR_CAN_SIGN and
+ GPGME_ATTR_CAN_CERTIFY.
+
+2003-07-08 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Progress Meter Callback): Change return type of
+ gpgme_progress_cb_t to void.
+
+2003-06-22 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi: Add 2003 to copyright notice.
+
+ * gpgme.texi (Header): Fix name space documentation on
+ libgpg-error.
+
+2003-06-22 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Multi Threading): Remove reference to
+ gpgme_recipients_t.
+
+2003-06-06 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Crypto Operations): Rename gpgme_invalid_user_id_t
+ to gpgme_invalid_key_t.
+
+2003-06-06 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi: Change error codes to GPG_ERR_* variants.
+ (Error Handling): Rewritten.
+
+2003-05-29 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Exporting Keys): Change and document prototypes.
+ Add new gpgme_op_export_ext and gpgme_op_export_ext_start
+ variants.
+ (Selecting Recipients): Section removed.
+ (Encrypting a Plaintext): Change prototypes and document the
+ changes.
+
+2003-05-28 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Exporting Keys): Change argument type from
+ gpgme_recipient_t to gpgme_user_id_t.
+ (Encrypting a Plaintext): Likewise.
+ (Selecting Recipients): Rewritten.
+
+2003-05-27 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Protocol Selection): Do not use @acronym in @node
+ because that breaks texi2dvi.
+
+ * gpgme.texi (Passphrase Callback): Document new prototype.
+
+2003-05-18 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Header): Remove Gpgme as namespace prefix. Add
+ _GPGME to namespace prefix.
+ * gpgme.texi (Multi Threading): Add note about link order.
+
+2003-05-04 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Listing Keys): Document what happens if key is not
+ found.
+
+ * gpgme.texi (Importing Keys): Fix cut and paste error.
+
+2003-04-30 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Encrypting a Plaintext): Remove reference to
+ gpgme_get_op_info.
+ (Detailed Results): Subsection removed.
+
+ * gpgme.texi (Key Listing Mode): Add GPGME_KEYLIST_MODE_SIGS.
+ (Manipulating Keys): Add obsoleteness note.
+ (Key Signatures): Likewise.
+ (Information About Keys): Likewise.
+ (Key Management): Add new data types GpgmeSubkey, GpgmeKeySig,
+ GpgmeUserID, and all the information about GpgmeKey.
+
+2003-04-29 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Listing Keys): Remove force_update argument from
+ gpgme_get_key.
+
+ * gpgme.texi (Trust Item Management): Add data members of
+ GpgmeTrustItem type.
+ (Information About Trust Items): Add note about obsoleteness.
+ (Manipulating Trust Items): Add gpgme_trust_item_ref and
+ gpgme_trust_item_unref.
+
+2003-04-28 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Verify): Rewritten to take into account new and
+ deprecated functions and data types.
+
+ * gpgme.texi (Decrypt): Descript gpgme_op_decrypt_result and
+ GpgmeDecryptResult.
+
+2003-04-27 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Encrypting a Plaintext): Add info about
+ GpgmeEncryptResult and gpgme_op_encrypt_result.
+
+ * gpgme.texi (Creating a Signature): Add info about
+ GpgmeNewSignature, GpgmeSignResult and gpgme_op_sign_result.
+ (Crypto Operations): Add GpgmeInvalidUserID.
+ (Algorithms): New chapter.
+
+ * gpgme.texi (Deleting Keys): Document
+ GPGME_Ambiguous_Specification.
+ (Error Values): Remove GPGME_Invalid_Type and GPGME_Invalid_Mode.
+ Add GPGME_Unknown_Reason, GPGME_Not_Found,
+ GPGME_Ambiguous_Specification, GPGME_Wrong_Key_Usage,
+ GPGME_Key_Revoked, GPGME_Key_Expired, GPGME_No_CRL_Known,
+ GPGME_CRL_Too_Old, GPGME_Policy_Mismatch, GPGME_No_Secret_Key,
+ GPGME_Key_Not_Trusted, GPGME_Issuer_Missing, GPGME_Chain_Too_Long,
+ GPGME_Unsupported_Algorithm, GPGME_Sig_Expired,
+ GPGME_Bad_Signature, GPGME_No_Public_Key.
+
+2003-04-25 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Importing Keys): Change GPGME_IMPORT_PRIVATE to
+ GPGME_IMPORT_SECRET.
+
+ * gpgme.texi (Importing Keys): Remove note about gpgme_get_op_info.
+ (Detailed Results): Remove note about import.
+
+ * gpgme.texi (Importing Keys): Add documentation for
+ GpgmeImportStatus, GpgmeImportResult and gpgme_op_import_result.
+
+ * gpgme.texi (Generating Keys): Fix documentation of public and
+ secret arguments.
+
+2003-04-24 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Generating Keys): Document changed gpgme_op_genkey
+ and new gpgme_op_genkey_result function. Document
+ GpgmeGenKeyResult data type.
+
+ * gpgme.texi (Error Values): Rename GPGME_No_Passphrase to
+ GPGME_Bad_Passphrase.
+ * gpgme.texi (Decrypt): Likewise.
+ (Decrypt and Verify): Likewise.
+ (Creating a Signature): Likewise.
+ (Encrypting a Plaintext): Likewise.
+
+ * gpgme.texi (Error Values): Rename GPGME_No_Recipients to
+ GPGME_No_UserID and GPGME_Invalid_Recipient to
+ GPGME_Invalid_UserID.
+ (Encrypting a Plaintext): Likewise.
+
+ * gpgme.texi (Error Values): Remove GPGME_Busy and GPGME_No_Request.
+ (Listing Keys): Likewise.
+ (Listing Trust Items): Likewise.
+
+2003-02-06 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Cancelling an Operation): Removed.
+ (Passphrase Callback): Document new type for GpgmePassphraseCb.
+
+2003-01-30 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Engine Information): Rename member part to
+ file_name.
+
+ * gpgme.texi (Protocols and Engines): Document
+ gpgme_get_protocol_name.
+
+ * gpgme.texi (Engine Information): Rewritten.
+
+2003-01-29 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (I/O Callback Interface): Document new even
+ GPGME_EVENT_START.
+ (Waiting For Completion): Document new possible return values.
+ (I/O Callback Interface): Document return type of GpgmeIOCb.
+
+2003-01-29 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Hooking Up Into Idle Time): Section removed.
+
+2002-12-24 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Verify): Drop R_STAT argument in gpgme_op_verify.
+ * gpgme.texi (Decrypt and Verify): Likewise for
+ gpgme_op_decrypt_verify.
+
+2002-12-23 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Information About Keys): Document that
+ GPGME_ATTR_IS_SECRET is not representable as a string anymore.
+
+2002-12-22 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Key Signatures): New section.
+ (Listing Keys): Add gpgme_get_key.
+
+2002-12-06 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Memory Based Data Buffers): New subsection.
+ (File Based Data Buffers): Likewise.
+ (Callback Based Data Buffers): Likewise.
+ (Manipulating Data Buffers): Update interfaces. Add
+ gpgme_data_seek.
+ * gpgme.texi (Engine Version Check): Remove gpgme_check_engine.
+
+2002-11-21 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Verify): Document the new interface.
+
+2002-11-19 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Generating Keys): Document new argument to
+ gpgme_op_genkey.
+
+2002-11-05 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Verify): Fix prototype of gpgme_get_sig_key.
+ Reported by Miguel Coca <e970095@zipi.fi.upm.es>.
+
+2002-08-30 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Selecting Signers): Fix reference count.
+
+2002-08-21 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Header): Document name space.
+
+2002-08-20 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Importing Keys): Document gpgme_op_import_ext.
+
+ * gpgme.texi (Importing Keys): Undocument EOF.
+
+2002-08-14 Werner Koch <wk@gnupg.org>
+
+ * gpgme.texi (Information About Keys): Changed GPGME_ATTR_TYPE.
+
+2002-07-25 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Deleting Keys): Say that secret keys might not be
+ deleted.
+
+2002-07-25 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Information About Keys): Document (badly) the new
+ key attributes.
+
+ * gpgme.texi (Manipulating Data Buffers): Mention that backend
+ tries to detect encoding automatically.
+
+2002-07-03 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Run Control): Update this section.
+ (Waiting For Completion): Likewise for this subsection.
+ (Cancelling an Operation): Likewise for this subsection.
+ (Using External Event Loops): New subsection with several
+ subsubsections.
+
+2002-06-28 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Multi Threading): Remove item about the need to
+ synchronize anything against gpgme_wait (except gpgme_wait
+ itself).
+
+2002-06-27 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Information About Keys): Fix documentation for IDX.
+ (Information About Trust Items): Likewise.
+
+2002-06-26 Werner Koch <wk@gnupg.org>
+
+ * gpgme.texi (Importing Keys): Document the return value -1 of
+ gpgme_op_import.
+
+2002-06-20 Werner Koch <wk@gnupg.org>
+
+ * gpgme.texi (Verify): Explain the new whatidx variable.
+
+2002-06-10 Werner Koch <wk@gnupg.org>
+
+ * gpgme.texi (Verify): Document attribute GPGME_ATTR_ERRTOK.
+
+2002-06-04 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Multi Threading): Document new autodetection.
+
+2002-06-04 Marcus Brinkmann <marcus@g10code.de>
+
+ * Makefile.am (DISTCLEANFILES): New variable.
+
+2002-05-26 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi: Some typographical correctons throughout.
+
+2002-05-09 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Using Automake): New section.
+
+2002-05-09 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Multi Threading): Escape { and }.
+
+2002-05-09 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Overview): Replace note about thread-safeness.
+ (Multi Threading): New section.
+
+2002-05-03 Werner Koch <wk@gnupg.org>
+
+ * gpgme.texi (Manipulating Data Buffers): Changed some data types
+ to void*.
+ (Protocol Selection): Added gpgme_get_protocol.
+ (Verify): Updated to include the new attribute fucntions and
+ status codes.
+
+2002-04-27 Werner Koch <wk@gnupg.org>
+
+ * gpgme.texi (Manipulating Data Buffers): New type GpgmeDataEncoding.
+
+2002-04-23 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Passphrase Callback): Document that either return
+ argument can be NULL.
+ (Progress Meter Callback): Likewise.
+
+2002-04-22 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Passphrase Callback): Fix small typo. Document the
+ new function gpgme_get_passphrase_cb.
+ (Progress Meter Callback): Document the new function
+ gpgme_get_progress_cb.
+
+2002-04-16 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Creating a Signature): Fix function name. Reported
+ by Wichert Ackerman <wichert@debian.org>.
+
+2002-03-29 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (direntry): End index entry with a full stop.
+ Patch submitted by Jose Carlos Garcia Sogo <jsogo@debian.org>.
+
+2002-03-17 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Detailed Results): Fix syntax error in last change.
+
+2002-03-08 Werner Koch <wk@gnupg.org>
+
+ * gpgme.texi (Detailed Results): Import does also return info.
+
+2002-03-06 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Encrypting a Plaintext): Document symmetric
+ encryption.
+
+2002-03-06 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Error Strings): Add example.
+ * gpgme.texi (Listing Keys): Likewise.
+
+2002-03-03 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Information About Keys): Document GPGME_ATTR_EXPIRE.
+
+2002-03-03 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Verify): Document verification of normal and
+ cleartext signatures.
+
+2002-02-27 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Listing Keys): Document gpgme_op_keylist_ext_start.
+
+2002-02-27 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Encrypting a Plaintext): Document
+ GPGME_Invalid_Recipients.
+ (Error Values): Likewise.
+
+2002-02-26 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Encrypting a Plaintext): Document
+ gpgme_op_encrypt_sign and gpgme_op_encrypt_sign_start.
+
+2002-02-25 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Creating a Signature): Add a note about
+ certificates to include.
+ (Included Certificates): New section.
+
+2002-02-09 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Detailed Results): Remove literal tags.
+ (Generating Keys): Update documentation.
+
+ * gpgme.texi (Generating Keys): Fix syntax error.
+
+2002-02-06 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Waiting For Completion): Adjust doc to changes in
+ the code.
+
+2002-02-06 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Key Listing Mode): Update documentation.
+
+2002-01-31 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Generating Keys): Document error at creation
+ failure.
+
+2002-01-30 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Deleting Keys): Document new error values.
+
+2002-01-30 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Importing Keys): Add reference to gpgme_get_op_info.
+
+2002-01-30 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi: Some spell checking.
+
+2002-01-30 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi: Add all the gpgme_op_*_start functions.
+ Fill the concept index with many, many entries.
+
+2002-01-29 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Run Control): New section.
+ (Verify): Docuent gpgme_get_notation.
+ (More Information): New section describing gpgme_get_op_info.
+
+2002-01-22 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Passphrase callback): Change GpgmePassphraseCb's
+ R_HD type from void* to void**.
+
+2002-01-22 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Creating data buffers): Change
+ gpgme_data_new_from_filepart's LENGTH type from off_t to size_t.
+
+2002-01-22 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi (Generating keys): New subsection.
+ (Exporting keys): Likewise.
+ (Importing keys): Likewise.
+ (Deleting keys): Likewise.
+
+2002-01-16 Marcus Brinkmann <marcus@g10code.de>
+
+ * gpgme.texi: g10Code -> g10 Code
+
+ * gpgme.texi (Top): Complete detailmenu.
+
+ * gpgme.texi: Convert embarassing cruft to the real thing.
+
+2002-01-16 Marcus Brinkmann <marcus@g10code.de>
+
+ * ChangeLog: New file.
+ * gpgme.texi: Likewise.
+ * gpl.texi: Likewise.
+ * fdl.texi: Likewise.
+ * Makefile.am (info_TEXINFOS): New variable.
+ (gpgme_TEXINFOS): Likewise.
+
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
+ 2011 g10 Code GmbH
+
+ This file is free software; as a special exception the author gives
+ unlimited permission to copy and/or distribute it, with or without
+ modifications, as long as this notice is preserved.
+
+ This file is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
+ implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
diff --git a/doc/HACKING b/doc/HACKING
new file mode 100644
index 0000000..6149d25
--- /dev/null
+++ b/doc/HACKING
@@ -0,0 +1,28 @@
+# HACKING -*- org -*-
+#+TITLE: Hacking notes for GPGME
+#+STARTUP: showall
+
+* No more ChangeLog files
+
+ Do not modify any of the ChangeLog files in GPGME. Starting
+ on December 1st, 2011 we put change information only in the GIT
+ commit log, and generate a top-level ChangeLog file from logs at
+ "make dist" time. As such, there are strict requirements on the
+ form of the commit log messages. The old ChangeLog files have all
+ be renamed to ChangeLog-2011
+
+
+* Commit log requirements
+
+ Your commit log should always start with a one-line summary, the
+ second line should be blank, and the remaining lines are usually
+ ChangeLog-style entries for all affected files. However, it's fine
+ -- even recommended -- to write a few lines of prose describing the
+ change, when the summary and ChangeLog entries don't give enough of
+ the big picture. Omit the leading TABs that you're used to seeing
+ in a "real" ChangeLog file, but keep the maximum line length at 72
+ or smaller, so that the generated ChangeLog lines, each with its
+ leading TAB, will not exceed 80 columns.
+
+ Note that ./autogen.sh installs a git hook to do some basic syntax
+ checking on the commit log message.
diff --git a/doc/Makefile.am b/doc/Makefile.am
new file mode 100644
index 0000000..93afc06
--- /dev/null
+++ b/doc/Makefile.am
@@ -0,0 +1,36 @@
+# doc - Automake template
+# Copyright (C) 2001, 2004 g10 Code GmbH
+#
+# This file is part of GPGME.
+#
+# GPGME is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as
+# published by the Free Software Foundation; either version 2.1 of the
+# License, or (at your option) any later version.
+#
+# GPGME is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
+# Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+
+## Process this file with automake to produce Makefile.in
+
+DISTCLEANFILES = gpgme.tmp
+
+EXTRA_DIST = module-overview.sk HACKING ChangeLog-2011
+
+info_TEXINFOS = gpgme.texi
+gpgme_TEXINFOS = uiserver.texi lesser.texi gpl.texi
+
+online: gpgme.html gpgme.pdf
+ set -e; \
+ echo "Uploading current manuals to www.gnupg.org ..."; \
+ user=werner ; \
+ (cd gpgme.html && rsync -vr --exclude='.svn' . \
+ $${user}@cvs.gnupg.org:webspace/manuals/gpgme/ ); \
+ rsync -v gpgme.pdf $${user}@cvs.gnupg.org:webspace/manuals/
+
diff --git a/doc/Makefile.in b/doc/Makefile.in
new file mode 100644
index 0000000..31455d6
--- /dev/null
+++ b/doc/Makefile.in
@@ -0,0 +1,722 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+# doc - Automake template
+# Copyright (C) 2001, 2004 g10 Code GmbH
+#
+# This file is part of GPGME.
+#
+# GPGME is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as
+# published by the Free Software Foundation; either version 2.1 of the
+# License, or (at your option) any later version.
+#
+# GPGME is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
+# Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+VPATH = @srcdir@
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+subdir = doc
+DIST_COMMON = $(gpgme_TEXINFOS) $(srcdir)/Makefile.am \
+ $(srcdir)/Makefile.in $(srcdir)/stamp-vti \
+ $(srcdir)/version.texi mdate-sh texinfo.tex
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/m4/glib-2.0.m4 \
+ $(top_srcdir)/m4/glibc21.m4 $(top_srcdir)/m4/gnupg-ttyname.m4 \
+ $(top_srcdir)/m4/gpg-error.m4 $(top_srcdir)/m4/libassuan.m4 \
+ $(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
+ $(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
+ $(top_srcdir)/m4/lt~obsolete.m4 $(top_srcdir)/acinclude.m4 \
+ $(top_srcdir)/configure.ac
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+ $(ACLOCAL_M4)
+mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs
+CONFIG_HEADER = $(top_builddir)/config.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+SOURCES =
+DIST_SOURCES =
+INFO_DEPS = $(srcdir)/gpgme.info
+am__TEXINFO_TEX_DIR = $(srcdir)
+DVIS = gpgme.dvi
+PDFS = gpgme.pdf
+PSS = gpgme.ps
+HTMLS = gpgme.html
+TEXINFOS = gpgme.texi
+TEXI2DVI = texi2dvi
+TEXI2PDF = $(TEXI2DVI) --pdf --batch
+MAKEINFOHTML = $(MAKEINFO) --html
+AM_MAKEINFOHTMLFLAGS = $(AM_MAKEINFOFLAGS)
+DVIPS = dvips
+am__installdirs = "$(DESTDIR)$(infodir)"
+am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
+am__vpath_adj = case $$p in \
+ $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
+ *) f=$$p;; \
+ esac;
+am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
+am__install_max = 40
+am__nobase_strip_setup = \
+ srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
+am__nobase_strip = \
+ for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
+am__nobase_list = $(am__nobase_strip_setup); \
+ for p in $$list; do echo "$$p $$p"; done | \
+ sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
+ $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
+ if (++n[$$2] == $(am__install_max)) \
+ { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
+ END { for (dir in files) print dir, files[dir] }'
+am__base_list = \
+ sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
+ sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+ACLOCAL = @ACLOCAL@
+AMTAR = @AMTAR@
+AR = @AR@
+AS = @AS@
+AUTOCONF = @AUTOCONF@
+AUTOHEADER = @AUTOHEADER@
+AUTOMAKE = @AUTOMAKE@
+AWK = @AWK@
+BUILD_FILEVERSION = @BUILD_FILEVERSION@
+BUILD_NUMBER = @BUILD_NUMBER@
+BUILD_TIMESTAMP = @BUILD_TIMESTAMP@
+CC = @CC@
+CCDEPMODE = @CCDEPMODE@
+CFLAGS = @CFLAGS@
+CPP = @CPP@
+CPPFLAGS = @CPPFLAGS@
+CXX = @CXX@
+CXXCPP = @CXXCPP@
+CXXDEPMODE = @CXXDEPMODE@
+CXXFLAGS = @CXXFLAGS@
+CYGPATH_W = @CYGPATH_W@
+DEFS = @DEFS@
+DEPDIR = @DEPDIR@
+DLLTOOL = @DLLTOOL@
+DSYMUTIL = @DSYMUTIL@
+DUMPBIN = @DUMPBIN@
+ECHO_C = @ECHO_C@
+ECHO_N = @ECHO_N@
+ECHO_T = @ECHO_T@
+EGREP = @EGREP@
+EXEEXT = @EXEEXT@
+FGREP = @FGREP@
+G13 = @G13@
+GITLOG_TO_CHANGELOG = @GITLOG_TO_CHANGELOG@
+GLIBC21 = @GLIBC21@
+GLIB_CFLAGS = @GLIB_CFLAGS@
+GLIB_GENMARSHAL = @GLIB_GENMARSHAL@
+GLIB_LIBS = @GLIB_LIBS@
+GLIB_MKENUMS = @GLIB_MKENUMS@
+GOBJECT_QUERY = @GOBJECT_QUERY@
+GPG = @GPG@
+GPGCONF = @GPGCONF@
+GPGME_CONFIG_API_VERSION = @GPGME_CONFIG_API_VERSION@
+GPGME_CONFIG_CFLAGS = @GPGME_CONFIG_CFLAGS@
+GPGME_CONFIG_HOST = @GPGME_CONFIG_HOST@
+GPGME_CONFIG_LIBS = @GPGME_CONFIG_LIBS@
+GPGSM = @GPGSM@
+GPG_ERROR_CFLAGS = @GPG_ERROR_CFLAGS@
+GPG_ERROR_CONFIG = @GPG_ERROR_CONFIG@
+GPG_ERROR_LIBS = @GPG_ERROR_LIBS@
+GPG_PATH = @GPG_PATH@
+GREP = @GREP@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+LD = @LD@
+LDFLAGS = @LDFLAGS@
+LIBASSUAN_CFLAGS = @LIBASSUAN_CFLAGS@
+LIBASSUAN_CONFIG = @LIBASSUAN_CONFIG@
+LIBASSUAN_LIBS = @LIBASSUAN_LIBS@
+LIBGPGME_LT_AGE = @LIBGPGME_LT_AGE@
+LIBGPGME_LT_CURRENT = @LIBGPGME_LT_CURRENT@
+LIBGPGME_LT_REVISION = @LIBGPGME_LT_REVISION@
+LIBOBJS = @LIBOBJS@
+LIBS = @LIBS@
+LIBTOOL = @LIBTOOL@
+LIPO = @LIPO@
+LN_S = @LN_S@
+LTLIBOBJS = @LTLIBOBJS@
+MAINT = @MAINT@
+MAKEINFO = @MAKEINFO@
+MANIFEST_TOOL = @MANIFEST_TOOL@
+MKDIR_P = @MKDIR_P@
+NEED__FILE_OFFSET_BITS = @NEED__FILE_OFFSET_BITS@
+NM = @NM@
+NMEDIT = @NMEDIT@
+OBJDUMP = @OBJDUMP@
+OBJEXT = @OBJEXT@
+OTOOL = @OTOOL@
+OTOOL64 = @OTOOL64@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PKG_CONFIG = @PKG_CONFIG@
+QT4_CORE_CFLAGS = @QT4_CORE_CFLAGS@
+QT4_CORE_LIBS = @QT4_CORE_LIBS@
+RANLIB = @RANLIB@
+RC = @RC@
+SED = @SED@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+STRIP = @STRIP@
+VERSION = @VERSION@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_AR = @ac_ct_AR@
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diff --git a/doc/gpgme.info b/doc/gpgme.info
new file mode 100644
index 0000000..a035624
--- /dev/null
+++ b/doc/gpgme.info
@@ -0,0 +1,156 @@
+This is /home/wk/w/gpgme/doc/gpgme.info, produced by makeinfo version
+4.13 from /home/wk/w/gpgme/doc/gpgme.texi.
+
+INFO-DIR-SECTION GNU Libraries
+START-INFO-DIR-ENTRY
+* GPGME: (gpgme). Adding support for cryptography to your program.
+END-INFO-DIR-ENTRY
+
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010 g10
+Code GmbH.
+
+ Permission is granted to copy, distribute and/or modify this
+ document under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 3 of the
+ License, or (at your option) any later version. The text of the
+ license can be found in the section entitled "Copying".
+
+ This document is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+ This file documents the GPGME library.
+
+ This is Edition 1.3.2, last updated 2 May 2012, of `The `GnuPG Made
+Easy' Reference Manual', for Version 1.3.2.
+
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010 g10
+Code GmbH.
+
+ Permission is granted to copy, distribute and/or modify this
+ document under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 3 of the
+ License, or (at your option) any later version. The text of the
+ license can be found in the section entitled "Copying".
+
+ This document is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+
+Indirect:
+gpgme.info-1: 1731
+gpgme.info-2: 276396
+
+Tag Table:
+(Indirect)
+Node: Top1731
+Node: Introduction8512
+Node: Getting Started9299
+Node: Features10424
+Node: Overview11574
+Node: Preparation12683
+Node: Header13680
+Node: Building the Source14379
+Node: Largefile Support (LFS)16488
+Node: Using Automake20492
+Node: Using Libtool22128
+Node: Library Version Check22478
+Node: Signal Handling25366
+Node: Multi Threading26582
+Ref: Multi Threading-Footnote-128764
+Node: Protocols and Engines29178
+Node: Engine Version Check31527
+Node: Engine Information32104
+Node: Engine Configuration35804
+Node: OpenPGP37066
+Node: Cryptographic Message Syntax37402
+Node: Algorithms37696
+Ref: Algorithms-Footnote-138175
+Node: Public Key Algorithms38303
+Node: Hash Algorithms40234
+Node: Error Handling41332
+Node: Error Values43194
+Node: Error Sources48272
+Node: Error Codes50599
+Node: Error Strings55238
+Node: Exchanging Data57017
+Node: Creating Data Buffers58331
+Node: Memory Based Data Buffers58847
+Node: File Based Data Buffers62201
+Node: Callback Based Data Buffers64372
+Node: Destroying Data Buffers69928
+Node: Manipulating Data Buffers71287
+Node: Data Buffer I/O Operations71706
+Node: Data Buffer Meta-Data74409
+Node: Contexts77759
+Node: Creating Contexts78882
+Node: Destroying Contexts79693
+Node: Result Management80028
+Node: Context Attributes81434
+Node: Protocol Selection82212
+Node: Crypto Engine83224
+Node: ASCII Armor85045
+Node: Text Mode85657
+Node: Included Certificates86588
+Node: Key Listing Mode87963
+Node: Passphrase Callback91320
+Node: Progress Meter Callback94370
+Node: Locale96294
+Node: Key Management97833
+Node: Listing Keys107761
+Node: Information About Keys115023
+Node: Key Signatures123021
+Node: Manipulating Keys127033
+Node: Generating Keys127875
+Node: Exporting Keys132482
+Node: Importing Keys138381
+Ref: Importing Keys-Footnote-1145544
+Node: Deleting Keys145672
+Node: Changing Passphrases147069
+Node: Advanced Key Editing148330
+Node: Trust Item Management151434
+Node: Listing Trust Items152504
+Node: Information About Trust Items154802
+Node: Manipulating Trust Items156684
+Node: Crypto Operations157645
+Node: Decrypt158889
+Node: Verify162747
+Node: Decrypt and Verify180603
+Node: Sign182607
+Node: Selecting Signers183171
+Node: Creating a Signature184152
+Node: Signature Notation Data188741
+Node: Encrypt190925
+Node: Encrypting a Plaintext191281
+Node: Run Control197126
+Node: Waiting For Completion197873
+Node: Using External Event Loops199919
+Node: I/O Callback Interface201886
+Node: Registering I/O Callbacks206980
+Node: I/O Callback Example208971
+Node: I/O Callback Example GTK+215190
+Node: I/O Callback Example GDK216979
+Node: I/O Callback Example Qt218621
+Node: Cancellation220909
+Node: UI Server Protocol223162
+Ref: UI Server Protocol-Footnote-1224599
+Node: UI Server Encrypt224718
+Node: UI Server Sign229899
+Node: UI Server Decrypt232128
+Node: UI Server Verify233566
+Node: UI Server Set Input Files237068
+Node: UI Server Sign/Encrypt Files237868
+Node: UI Server Verify/Decrypt Files239637
+Node: UI Server Import/Export Keys241483
+Node: UI Server Checksum Files242516
+Node: Miscellaneous UI Server Commands244682
+Ref: command SENDER246594
+Node: Library Copying248270
+Node: Copying276396
+Node: Function and Data Index314027
+Node: Concept Index339006
+
+End Tag Table
diff --git a/doc/gpgme.info-1 b/doc/gpgme.info-1
new file mode 100644
index 0000000..35b948a
--- /dev/null
+++ b/doc/gpgme.info-1
@@ -0,0 +1,6615 @@
+This is /home/wk/w/gpgme/doc/gpgme.info, produced by makeinfo version
+4.13 from /home/wk/w/gpgme/doc/gpgme.texi.
+
+INFO-DIR-SECTION GNU Libraries
+START-INFO-DIR-ENTRY
+* GPGME: (gpgme). Adding support for cryptography to your program.
+END-INFO-DIR-ENTRY
+
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010 g10
+Code GmbH.
+
+ Permission is granted to copy, distribute and/or modify this
+ document under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 3 of the
+ License, or (at your option) any later version. The text of the
+ license can be found in the section entitled "Copying".
+
+ This document is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+ This file documents the GPGME library.
+
+ This is Edition 1.3.2, last updated 2 May 2012, of `The `GnuPG Made
+Easy' Reference Manual', for Version 1.3.2.
+
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010 g10
+Code GmbH.
+
+ Permission is granted to copy, distribute and/or modify this
+ document under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 3 of the
+ License, or (at your option) any later version. The text of the
+ license can be found in the section entitled "Copying".
+
+ This document is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+
+File: gpgme.info, Node: Top, Next: Introduction, Up: (dir)
+
+Main Menu
+*********
+
+This is Edition 1.3.2, last updated 2 May 2012, of `The `GnuPG Made
+Easy' Reference Manual', for Version 1.3.2 of the GPGME library.
+
+* Menu:
+
+* Introduction:: How to use this manual.
+* Preparation:: What you should do before using the library.
+* Protocols and Engines:: Supported crypto protocols.
+* Algorithms:: Supported algorithms.
+* Error Handling:: Error numbers and their meanings.
+* Exchanging Data:: Passing data to and from GPGME.
+* Contexts:: Handling GPGME contexts.
+
+Appendices
+
+* UI Server Protocol:: The GnuPG UI Server Protocol.
+
+* Library Copying:: The GNU Lesser General Public License says
+ how you can copy and share `GnuPG Made Easy'.
+* Copying:: The GNU General Public License says how you
+ can copy and share this manual.
+
+Indices
+
+* Concept Index:: Index of concepts and programs.
+* Function and Data Index:: Index of functions, variables and data types.
+
+
+ --- The Detailed Node Listing ---
+
+Introduction
+
+* Getting Started:: Purpose of the manual, and how to use it.
+* Features:: Reasons to install and use GPGME.
+* Overview:: Basic architecture of the GPGME library.
+
+Preparation
+
+* Header:: What header file you need to include.
+* Building the Source:: Compiler options to be used.
+* Largefile Support (LFS):: How to use GPGME with LFS.
+* Using Automake:: Compiler options to be used the easy way.
+* Using Libtool:: Avoiding compiler options entirely.
+* Library Version Check:: Getting and verifying the library version.
+* Signal Handling:: How GPGME affects signal handling.
+* Multi Threading:: How GPGME can be used in an MT environment.
+
+Protocols and Engines
+
+* Engine Version Check:: Verifying the engine version.
+* Engine Information:: Obtaining more information about the engines.
+* Engine Configuration:: Changing the engine configuration.
+* OpenPGP:: Support for the OpenPGP protocol.
+* Cryptographic Message Syntax:: Support for the CMS.
+
+Algorithms
+
+* Public Key Algorithms:: A list of all public key algorithms.
+* Hash Algorithms:: A list of all hash algorithms.
+
+Error Handling
+
+* Error Values:: The error value and what it means.
+* Error Codes:: A list of important error codes.
+* Error Sources:: A list of important error sources.
+* Error Strings:: How to get a descriptive string from a value.
+
+Exchanging Data
+
+* Creating Data Buffers:: Creating new data buffers.
+* Destroying Data Buffers:: Releasing data buffers.
+* Manipulating Data Buffers:: Operations on data buffers.
+
+Creating Data Buffers
+
+* Memory Based Data Buffers:: Creating memory based data buffers.
+* File Based Data Buffers:: Creating file based data buffers.
+* Callback Based Data Buffers:: Creating callback based data buffers.
+
+Manipulating Data Buffers
+
+* Data Buffer I/O Operations:: I/O operations on data buffers.
+* Data Buffer Meta-Data:: Meta-data manipulation of data buffers.
+
+Contexts
+
+* Creating Contexts:: Creating new GPGME contexts.
+* Destroying Contexts:: Releasing GPGME contexts.
+* Result Management:: Managing the result of crypto operations.
+* Context Attributes:: Setting properties of a context.
+* Key Management:: Managing keys with GPGME.
+* Trust Item Management:: Managing trust items with GPGME.
+* Crypto Operations:: Using a context for cryptography.
+* Run Control:: Controlling how operations are run.
+
+Context Attributes
+
+* Protocol Selection:: Selecting the protocol used by a context.
+* Crypto Engine:: Configuring the crypto engine.
+* ASCII Armor:: Requesting ASCII armored output.
+* Text Mode:: Choosing canonical text mode.
+* Included Certificates:: Including a number of certificates.
+* Key Listing Mode:: Selecting key listing mode.
+* Passphrase Callback:: Getting the passphrase from the user.
+* Progress Meter Callback:: Being informed about the progress.
+* Locale:: Setting the locale of a context.
+
+Key Management
+
+* Listing Keys:: Browsing the list of available keys.
+* Information About Keys:: Requesting detailed information about keys.
+* Key Signatures:: Listing the signatures on a key.
+* Manipulating Keys:: Operations on keys.
+* Generating Keys:: Creating new key pairs.
+* Exporting Keys:: Retrieving key data from the key ring.
+* Importing Keys:: Adding keys to the key ring.
+* Deleting Keys:: Removing keys from the key ring.
+* Advanced Key Editing:: Advanced key edit operation.
+
+Trust Item Management
+
+* Listing Trust Items:: Browsing the list of available trust items.
+* Information About Trust Items:: Requesting information about trust items.
+* Manipulating Trust Items:: Operations on trust items.
+
+Crypto Operations
+
+* Decrypt:: Decrypting a ciphertext.
+* Verify:: Verifying a signature.
+* Decrypt and Verify:: Decrypting a signed ciphertext.
+* Sign:: Creating a signature.
+* Encrypt:: Encrypting a plaintext.
+
+Sign
+
+* Selecting Signers:: How to choose the keys to sign with.
+* Creating a Signature:: How to create a signature.
+* Signature Notation Data:: How to add notation data to a signature.
+
+Encrypt
+
+* Encrypting a Plaintext:: How to encrypt a plaintext.
+
+Run Control
+
+* Waiting For Completion:: Waiting until an operation is completed.
+* Using External Event Loops:: Advanced control over what happens when.
+* Cancellation:: How to end pending operations prematurely.
+
+Using External Event Loops
+
+* I/O Callback Interface:: How I/O callbacks are registered.
+* Registering I/O Callbacks:: How to use I/O callbacks for a context.
+* I/O Callback Example:: An example how to use I/O callbacks.
+* I/O Callback Example GTK+:: How to integrate GPGME in GTK+.
+* I/O Callback Example GDK:: How to integrate GPGME in GDK.
+* I/O Callback Example Qt:: How to integrate GPGME in Qt.
+
+
+File: gpgme.info, Node: Introduction, Next: Preparation, Prev: Top, Up: Top
+
+1 Introduction
+**************
+
+`GnuPG Made Easy' (GPGME) is a C language library that allows to add
+support for cryptography to a program. It is designed to make access
+to public key crypto engines like GnuPG or GpgSM easier for
+applications. GPGME provides a high-level crypto API for encryption,
+decryption, signing, signature verification and key management.
+
+ GPGME uses GnuPG and GpgSM as its backends to support OpenPGP and
+the Cryptographic Message Syntax (CMS).
+
+* Menu:
+
+* Getting Started:: Purpose of the manual, and how to use it.
+* Features:: Reasons to install and use GPGME.
+* Overview:: Basic architecture of the GPGME library.
+
+
+File: gpgme.info, Node: Getting Started, Next: Features, Up: Introduction
+
+1.1 Getting Started
+===================
+
+This manual documents the GPGME library programming interface. All
+functions and data types provided by the library are explained.
+
+ The reader is assumed to possess basic knowledge about cryptography
+in general, and public key cryptography in particular. The underlying
+cryptographic engines that are used by the library are not explained,
+but where necessary, special features or requirements by an engine are
+mentioned as far as they are relevant to GPGME or its users.
+
+ This manual can be used in several ways. If read from the beginning
+to the end, it gives a good introduction into the library and how it
+can be used in an application. Forward references are included where
+necessary. Later on, the manual can be used as a reference manual to
+get just the information needed about any particular interface of the
+library. Experienced programmers might want to start looking at the
+examples at the end of the manual, and then only read up those parts of
+the interface which are unclear.
+
+
+File: gpgme.info, Node: Features, Next: Overview, Prev: Getting Started, Up: Introduction
+
+1.2 Features
+============
+
+GPGME has a couple of advantages over other libraries doing a similar
+job, and over implementing support for GnuPG or other crypto engines
+into your application directly.
+
+it's free software
+ Anybody can use, modify, and redistribute it under the terms of
+ the GNU Lesser General Public License (*note Library Copying::).
+
+it's flexible
+ GPGME provides transparent support for several cryptographic
+ protocols by different engines. Currently, GPGME supports the
+ OpenPGP protocol using GnuPG as the backend, and the Cryptographic
+ Message Syntax using GpgSM as the backend.
+
+it's easy
+ GPGME hides the differences between the protocols and engines from
+ the programmer behind an easy-to-use interface. This way the
+ programmer can focus on the other parts of the program, and still
+ integrate strong cryptography in his application. Once support for
+ GPGME has been added to a program, it is easy to add support for
+ other crypto protocols once GPGME backends provide them.
+
+
+File: gpgme.info, Node: Overview, Prev: Features, Up: Introduction
+
+1.3 Overview
+============
+
+GPGME provides a data abstraction that is used to pass data to the
+crypto engine, and receive returned data from it. Data can be read
+from memory or from files, but it can also be provided by a callback
+function.
+
+ The actual cryptographic operations are always set within a context.
+A context provides configuration parameters that define the behaviour
+of all operations performed within it. Only one operation per context
+is allowed at any time, but when one operation is finished, you can run
+the next operation in the same context. There can be more than one
+context, and all can run different operations at the same time.
+
+ Furthermore, GPGME has rich key management facilities including
+listing keys, querying their attributes, generating, importing,
+exporting and deleting keys, and acquiring information about the trust
+path.
+
+ With some precautions, GPGME can be used in a multi-threaded
+environment, although it is not completely thread safe and thus needs
+the support of the application.
+
+
+File: gpgme.info, Node: Preparation, Next: Protocols and Engines, Prev: Introduction, Up: Top
+
+2 Preparation
+*************
+
+To use GPGME, you have to perform some changes to your sources and the
+build system. The necessary changes are small and explained in the
+following sections. At the end of this chapter, it is described how
+the library is initialized, and how the requirements of the library are
+verified.
+
+* Menu:
+
+* Header:: What header file you need to include.
+* Building the Source:: Compiler options to be used.
+* Largefile Support (LFS):: How to use GPGME with LFS.
+* Using Automake:: Compiler options to be used the easy way.
+* Using Libtool:: Avoiding compiler options entirely.
+* Library Version Check:: Getting and verifying the library version.
+* Signal Handling:: How GPGME affects signal handling.
+* Multi Threading:: How GPGME can be used in an MT environment.
+
+
+File: gpgme.info, Node: Header, Next: Building the Source, Up: Preparation
+
+2.1 Header
+==========
+
+All interfaces (data types and functions) of the library are defined in
+the header file `gpgme.h'. You must include this in all programs using
+the library, either directly or through some other header file, like
+this:
+
+ #include <gpgme.h>
+
+ The name space of GPGME is `gpgme_*' for function names and data
+types and `GPGME_*' for other symbols. Symbols internal to GPGME take
+the form `_gpgme_*' and `_GPGME_*'.
+
+ Because GPGME makes use of the GPG Error library, using GPGME will
+also use the `GPG_ERR_*' name space directly, and the `gpg_err*' and
+`gpg_str*' name space indirectly.
+
+
+File: gpgme.info, Node: Building the Source, Next: Largefile Support (LFS), Prev: Header, Up: Preparation
+
+2.2 Building the Source
+=======================
+
+If you want to compile a source file including the `gpgme.h' header
+file, you must make sure that the compiler can find it in the directory
+hierarchy. This is accomplished by adding the path to the directory in
+which the header file is located to the compilers include file search
+path (via the `-I' option).
+
+ However, the path to the include file is determined at the time the
+source is configured. To solve this problem, gpgme ships with a small
+helper program `gpgme-config' that knows about the path to the include
+file and other configuration options. The options that need to be
+added to the compiler invocation at compile time are output by the
+`--cflags' option to `gpgme-config'. The following example shows how
+it can be used at the command line:
+
+ gcc -c foo.c `gpgme-config --cflags`
+
+ Adding the output of `gpgme-config --cflags' to the compiler command
+line will ensure that the compiler can find the GPGME header file.
+
+ A similar problem occurs when linking the program with the library.
+Again, the compiler has to find the library files. For this to work,
+the path to the library files has to be added to the library search
+path (via the `-L' option). For this, the option `--libs' to
+`gpgme-config' can be used. For convenience, this option also outputs
+all other options that are required to link the program with GPGME (in
+particular, the `-lgpgme' option). The example shows how to link
+`foo.o' with the GPGME library to a program `foo'.
+
+ gcc -o foo foo.o `gpgme-config --libs`
+
+ Of course you can also combine both examples to a single command by
+specifying both options to `gpgme-config':
+
+ gcc -o foo foo.c `gpgme-config --cflags --libs`
+
+ If you want to link to one of the thread-safe versions of GPGME, you
+must specify the `--thread' option before any other option to select
+the thread package you want to link with. Supported thread packages
+are `--thread=pth' and `--thread=pthread'.
+
+
+File: gpgme.info, Node: Largefile Support (LFS), Next: Using Automake, Prev: Building the Source, Up: Preparation
+
+2.3 Largefile Support (LFS)
+===========================
+
+GPGME is compiled with largefile support by default, if it is available
+on the system. This means that GPGME supports files larger than two
+gigabyte in size, if the underlying operating system can. On some
+systems, largefile support is already the default. On such systems,
+nothing special is required. However, some systems provide only
+support for files up to two gigabyte in size by default. Support for
+larger file sizes has to be specifically enabled.
+
+ To make a difficult situation even more complex, such systems provide
+two different types of largefile support. You can either get all
+relevant functions replaced with alternatives that are largefile
+capable, or you can get new functions and data types for largefile
+support added. Those new functions have the same name as their
+smallfile counterparts, but with a suffix of 64.
+
+ An example: The data type `off_t' is 32 bit wide on GNU/Linux PC
+systems. To address offsets in large files, you can either enable
+largefile support add-on. Then a new data type `off64_t' is provided,
+which is 64 bit wide. Or you can replace the existing `off_t' data
+type with its 64 bit wide counterpart. All occurences of `off_t' are
+then automagically replaced.
+
+ As if matters were not complex enough, there are also two different
+types of file descriptors in such systems. This is important because
+if file descriptors are exchanged between programs that use a different
+maximum file size, certain errors must be produced on some file
+descriptors to prevent subtle overflow bugs from occuring.
+
+ As you can see, supporting two different maximum file sizes at the
+same time is not at all an easy task. However, the maximum file size
+does matter for GPGME, because some data types it uses in its
+interfaces are affected by that. For example, the `off_t' data type is
+used in the `gpgme_data_seek' function, to match its POSIX counterpart.
+This affects the call-frame of the function, and thus the ABI of the
+library. Furthermore, file descriptors can be exchanged between GPGME
+and the application.
+
+ For you as the user of the library, this means that your program must
+be compiled in the same file size mode as the library. Luckily, there
+is absolutely no valid reason for new programs to not enable largefile
+support by default and just use that. The compatibility modes (small
+file sizes or dual mode) can be considered an historic artefact, only
+useful to allow for a transitional period.
+
+ GPGME is compiled using largefile support by default. This means
+that your application must do the same, at least as far as it is
+relevant for using the `gpgme.h' header file. All types in this header
+files refer to their largefile counterparts, if they are different from
+any default types on the system.
+
+ You can enable largefile support, if it is different from the default
+on the system the application is compiled on, by using the Autoconf
+macro `AC_SYS_LARGEFILE'. If you do this, then you don't need to worry
+about anything else: It will just work. In this case you might also
+want to use `AC_FUNC_FSEEKO' to take advantage of some new interfaces,
+and `AC_TYPE_OFF_T' (just in case).
+
+ If you do not use Autoconf, you can define the preprocessor symbol
+`_FILE_OFFSET_BITS' to 64 _before_ including any header files, for
+example by specifying the option `-D_FILE_OFFSET_BITS=64' on the
+compiler command line. You will also want to define the preprocessor
+symbol `LARGEFILE_SOURCE' to 1 in this case, to take advantage of some
+new interfaces.
+
+ If you do not want to do either of the above, you probably know
+enough about the issue to invent your own solution. Just keep in mind
+that the GPGME header file expects that largefile support is enabled,
+if it is available. In particular, we do not support dual mode
+(`_LARGEFILE64_SOURCE').
+
+
+File: gpgme.info, Node: Using Automake, Next: Using Libtool, Prev: Largefile Support (LFS), Up: Preparation
+
+2.4 Using Automake
+==================
+
+It is much easier if you use GNU Automake instead of writing your own
+Makefiles. If you do that you do not have to worry about finding and
+invoking the `gpgme-config' script at all. GPGME provides an extension
+to Automake that does all the work for you.
+
+ -- Macro: AM_PATH_GPGME ([MINIMUM-VERSION], [ACTION-IF-FOUND],
+ [ACTION-IF-NOT-FOUND])
+ -- Macro: AM_PATH_GPGME_PTH ([MINIMUM-VERSION], [ACTION-IF-FOUND],
+ [ACTION-IF-NOT-FOUND])
+ -- Macro: AM_PATH_GPGME_PTHREAD ([MINIMUM-VERSION], [ACTION-IF-FOUND],
+ [ACTION-IF-NOT-FOUND])
+ Check whether GPGME (at least version MINIMUM-VERSION, if given)
+ exists on the host system. If it is found, execute
+ ACTION-IF-FOUND, otherwise do ACTION-IF-NOT-FOUND, if given.
+
+ Additionally, the function defines `GPGME_CFLAGS' to the flags
+ needed for compilation of the program to find the `gpgme.h' header
+ file, and `GPGME_LIBS' to the linker flags needed to link the
+ program to the GPGME library.
+
+ `AM_PATH_GPGME_PTH' checks for the version of GPGME that can be
+ used with GNU Pth, and defines `GPGME_PTH_CFLAGS' and
+ `GPGME_PTH_LIBS'.
+
+ `AM_PATH_GPGME_PTHREAD' checks for the version of GPGME that can
+ be used with the native pthread implementation, and defines
+ `GPGME_PTHREAD_CFLAGS' and `GPGME_PTHREAD_LIBS'.
+
+ You can use the defined Autoconf variables like this in your
+`Makefile.am':
+
+ AM_CPPFLAGS = $(GPGME_CFLAGS)
+ LDADD = $(GPGME_LIBS)
+
+
+File: gpgme.info, Node: Using Libtool, Next: Library Version Check, Prev: Using Automake, Up: Preparation
+
+2.5 Using Libtool
+=================
+
+The easiest way is to just use GNU Libtool. If you use libtool, and
+link to `libgpgme.la', `libgpgme-pth.la' or `libgpgme-pthread.la'
+respectively, everything will be done automatically by Libtool.
+
+
+File: gpgme.info, Node: Library Version Check, Next: Signal Handling, Prev: Using Libtool, Up: Preparation
+
+2.6 Library Version Check
+=========================
+
+ -- Function: const char * gpgme_check_version
+ (const char *REQUIRED_VERSION)
+ The function `gpgme_check_version' has four purposes. It can be
+ used to retrieve the version number of the library. In addition it
+ can verify that the version number is higher than a certain
+ required version number. In either case, the function initializes
+ some sub-systems, and for this reason alone it must be invoked
+ early in your program, before you make use of the other functions
+ in GPGME. The last purpose is to run selftests.
+
+ As a side effect for W32 based systems, the socket layer will get
+ initialized.
+
+ If REQUIRED_VERSION is `NULL', the function returns a pointer to a
+ statically allocated string containing the version number of the
+ library.
+
+ If REQUIRED_VERSION is not `NULL', it should point to a string
+ containing a version number, and the function checks that the
+ version of the library is at least as high as the version number
+ provided. In this case, the function returns a pointer to a
+ statically allocated string containing the version number of the
+ library. If REQUIRED_VERSION is not a valid version number, or if
+ the version requirement is not met, the function returns `NULL'.
+
+ If you use a version of a library that is backwards compatible with
+ older releases, but contains additional interfaces which your
+ program uses, this function provides a run-time check if the
+ necessary features are provided by the installed version of the
+ library.
+
+ If a selftest fails, the function may still succeed. Selftest
+ errors are returned later when invoking `gpgme_new', so that a
+ detailed error code can be returned (historically,
+ `gpgme_check_version' does not return a detailed error code).
+
+ After initializing GPGME, you should set the locale information to
+the locale required for your output terminal. This locale information
+is needed for example for the curses and Gtk pinentry. Here is an
+example of a complete initialization:
+
+ #include <locale.h>
+ #include <gpgme.h>
+
+ void
+ init_gpgme (void)
+ {
+ /* Initialize the locale environment. */
+ setlocale (LC_ALL, "");
+ gpgme_check_version (NULL);
+ gpgme_set_locale (NULL, LC_CTYPE, setlocale (LC_CTYPE, NULL));
+ #ifdef LC_MESSAGES
+ gpgme_set_locale (NULL, LC_MESSAGES, setlocale (LC_MESSAGES, NULL));
+ #endif
+ }
+
+ Note that you are highly recommended to initialize the locale
+settings like this. GPGME can not do this for you because it would not
+be thread safe. The conditional on LC_MESSAGES is only necessary for
+portability to W32 systems.
+
+
+File: gpgme.info, Node: Signal Handling, Next: Multi Threading, Prev: Library Version Check, Up: Preparation
+
+2.7 Signal Handling
+===================
+
+The GPGME library communicates with child processes (the crypto
+engines). If a child process dies unexpectedly, for example due to a
+bug, or system problem, a `SIGPIPE' signal will be delivered to the
+application. The default action is to abort the program. To protect
+against this, `gpgme_check_version' sets the `SIGPIPE' signal action to
+`SIG_IGN', which means that the signal will be ignored.
+
+ GPGME will only do that if the signal action for `SIGPIPE' is
+`SIG_DEF' at the time `gpgme_check_version' is called. If it is
+something different, `GPGME' will take no action.
+
+ This means that if your application does not install any signal
+handler for `SIGPIPE', you don't need to take any precautions. If you
+do install a signal handler for `SIGPIPE', you must be prepared to
+handle any `SIGPIPE' events that occur due to GPGME writing to a
+defunct pipe. Furthermore, if your application is multi-threaded, and
+you install a signal action for `SIGPIPE', you must make sure you do
+this either before `gpgme_check_version' is called or afterwards.
+
+
+File: gpgme.info, Node: Multi Threading, Prev: Signal Handling, Up: Preparation
+
+2.8 Multi Threading
+===================
+
+The GPGME library is not entirely thread-safe, but it can still be used
+in a multi-threaded environment if some care is taken. If the
+following requirements are met, there should be no race conditions to
+worry about:
+
+ * GPGME supports the thread libraries pthread and GNU Pth. The
+ support for this has to be enabled at compile time. GPGME will
+ automatically detect the location in which the thread libraries
+ are installed and activate the support for them at build time.
+
+ Support for other thread libraries is very easy to add. Please
+ contact us if you have the need.
+
+ * If you want to use GPGME with threads, you must link to the right
+ version of the library. The name of the right library is
+ `libgpgme-' followed by the name of the thread package you use.
+ For example, if you use GNU Pth, the right name is `libgpgme-pth'.
+ Use the Automake macros or `gpgme-config' program for simplicity.
+
+ * The function `gpgme_check_version' must be called before any other
+ function in the library, because it initializes the thread support
+ subsystem in GPGME. To achieve this in multi-threaded programs,
+ you must synchronize the memory with respect to other threads that
+ also want to use GPGME. For this, it is sufficient to call
+ `gpgme_check_version' before creating the other threads using
+ GPGME(1).
+
+ * Any `gpgme_data_t' and `gpgme_ctx_t' object must only be accessed
+ by one thread at a time. If multiple threads want to deal with
+ the same object, the caller has to make sure that operations on
+ that object are fully synchronized.
+
+ * Only one thread at any time is allowed to call `gpgme_wait'. If
+ multiple threads call this function, the caller must make sure that
+ all invocations are fully synchronized. It is safe to start
+ asynchronous operations while a thread is running in gpgme_wait.
+
+ * The function `gpgme_strerror' is not thread safe. You have to use
+ `gpgme_strerror_r' instead.
+
+ ---------- Footnotes ----------
+
+ (1) At least this is true for POSIX threads, as `pthread_create' is
+a function that synchronizes memory with respects to other threads.
+There are many functions which have this property, a complete list can
+be found in POSIX, IEEE Std 1003.1-2003, Base Definitions, Issue 6, in
+the definition of the term "Memory Synchronization". For other thread
+packages other, more relaxed or more strict rules may apply.
+
+
+File: gpgme.info, Node: Protocols and Engines, Next: Algorithms, Prev: Preparation, Up: Top
+
+3 Protocols and Engines
+***********************
+
+GPGME supports several cryptographic protocols, however, it does not
+implement them. Rather it uses backends (also called engines) which
+implement the protocol. GPGME uses inter-process communication to pass
+data back and forth between the application and the backend, but the
+details of the communication protocol and invocation of the backend is
+completely hidden by the interface. All complexity is handled by
+GPGME. Where an exchange of information between the application and
+the backend is necessary, GPGME provides the necessary callback function
+hooks and further interfaces.
+
+ -- Data type: enum gpgme_protocol_t
+ The `gpgme_protocol_t' type specifies the set of possible protocol
+ values that are supported by GPGME. The following protocols are
+ supported:
+
+ `GPGME_PROTOCOL_OpenPGP'
+ This specifies the OpenPGP protocol.
+
+ `GPGME_PROTOCOL_CMS'
+ This specifies the Cryptographic Message Syntax.
+
+ `GPGME_PROTOCOL_ASSUAN'
+ Under development. Please ask on <gnupg-devel@gnupg.org> for
+ help.
+
+ `GPGME_PROTOCOL_G13'
+ Under development. Please ask on <gnupg-devel@gnupg.org> for
+ help.
+
+ `GPGME_PROTOCOL_UISERVER'
+ Under development. Please ask on <gnupg-devel@gnupg.org> for
+ help.
+
+ `GPGME_PROTOCOL_UNKNOWN'
+ Reserved for future extension. You may use this to indicate
+ that the used protocol is not known to the application.
+ Currently, GPGME does not accept this value in any operation,
+ though, except for `gpgme_get_protocol_name'.
+
+ -- Function: const char * gpgme_get_protocol_name
+ (gpgme_protocol_t PROTOCOL)
+ The function `gpgme_get_protocol_name' returns a statically
+ allocated string describing the protocol PROTOCOL, or `NULL' if
+ the protocol number is not valid.
+
+* Menu:
+
+* Engine Version Check:: Verifying the engine version.
+* Engine Information:: Obtaining more information about the engines.
+* Engine Configuration:: Changing the engine configuration.
+* OpenPGP:: Support for the OpenPGP protocol.
+* Cryptographic Message Syntax:: Support for the CMS.
+
+
+File: gpgme.info, Node: Engine Version Check, Next: Engine Information, Up: Protocols and Engines
+
+3.1 Engine Version Check
+========================
+
+ -- Function: gpgme_error_t gpgme_engine_check_version
+ (gpgme_protocol_t PROTOCOL)
+ The function `gpgme_engine_check_version' verifies that the engine
+ implementing the protocol PROTOCOL is installed in the expected
+ path and meets the version requirement of GPGME.
+
+ This function returns the error code `GPG_ERR_NO_ERROR' if the
+ engine is available and `GPG_ERR_INV_ENGINE' if it is not.
+
+
+File: gpgme.info, Node: Engine Information, Next: Engine Configuration, Prev: Engine Version Check, Up: Protocols and Engines
+
+3.2 Engine Information
+======================
+
+ -- Data type: gpgme_engine_info_t
+ The `gpgme_engine_info_t' type specifies a pointer to a structure
+ describing a crypto engine. The structure contains the following
+ elements:
+
+ `gpgme_engine_info_t next'
+ This is a pointer to the next engine info structure in the
+ linked list, or `NULL' if this is the last element.
+
+ `gpgme_protocol_t protocol'
+ This is the protocol for which the crypto engine is used.
+ You can convert this to a string with
+ `gpgme_get_protocol_name' for printing.
+
+ `const char *file_name'
+ This is a string holding the file name of the executable of
+ the crypto engine. Currently, it is never `NULL', but using
+ `NULL' is reserved for future use, so always check before you
+ use it.
+
+ `const char *home_dir'
+ This is a string holding the directory name of the crypto
+ engine's configuration directory. If it is `NULL', then the
+ default directory is used.
+
+ `const char *version'
+ This is a string containing the version number of the crypto
+ engine. It might be `NULL' if the version number can not be
+ determined, for example because the executable doesn't exist
+ or is invalid.
+
+ `const char *req_version'
+ This is a string containing the minimum required version
+ number of the crypto engine for GPGME to work correctly.
+ This is the version number that `gpgme_engine_check_version'
+ verifies against. Currently, it is never `NULL', but using
+ `NULL' is reserved for future use, so always check before you
+ use it.
+
+ -- Function: gpgme_error_t gpgme_get_engine_info
+ (gpgme_engine_info_t *INFO)
+ The function `gpgme_get_engine_info' returns a linked list of
+ engine info structures in INFO. Each info structure describes the
+ defaults of one configured backend.
+
+ The memory for the info structures is allocated the first time this
+ function is invoked, and must not be freed by the caller.
+
+ This function returns the error code `GPG_ERR_NO_ERROR' if
+ successful, and a system error if the memory could not be
+ allocated.
+
+ Here is an example how you can provide more diagnostics if you
+receive an error message which indicates that the crypto engine is
+invalid.
+
+ gpgme_ctx_t ctx;
+ gpgme_error_t err;
+
+ [...]
+
+ if (gpgme_err_code (err) == GPG_ERR_INV_ENGINE)
+ {
+ gpgme_engine_info_t info;
+ err = gpgme_get_engine_info (&info);
+ if (!err)
+ {
+ while (info && info->protocol != gpgme_get_protocol (ctx))
+ info = info->next;
+ if (!info)
+ fprintf (stderr, "GPGME compiled without support for protocol %s",
+ gpgme_get_protocol_name (info->protocol));
+ else if (info->file_name && !info->version)
+ fprintf (stderr, "Engine %s not installed properly",
+ info->file_name);
+ else if (info->file_name && info->version && info->req_version)
+ fprintf (stderr, "Engine %s version %s installed, "
+ "but at least version %s required", info->file_name,
+ info->version, info->req_version);
+ else
+ fprintf (stderr, "Unknown problem with engine for protocol %s",
+ gpgme_get_protocol_name (info->protocol));
+ }
+ }
+
+
+File: gpgme.info, Node: Engine Configuration, Next: OpenPGP, Prev: Engine Information, Up: Protocols and Engines
+
+3.3 Engine Configuration
+========================
+
+You can change the configuration of a backend engine, and thus change
+the executable program and configuration directory to be used. You can
+make these changes the default or set them for some contexts
+individually.
+
+ -- Function: gpgme_error_t gpgme_set_engine_info
+ (gpgme_protocol_t PROTO, const char *FILE_NAME,
+ const char *HOME_DIR)
+ The function `gpgme_set_engine_info' changes the default
+ configuration of the crypto engine implementing the protocol PROTO.
+
+ FILE_NAME is the file name of the executable program implementing
+ this protocol, and HOME_DIR is the directory name of the
+ configuration directory for this crypto engine. If HOME_DIR is
+ `NULL', the engine's default will be used.
+
+ The new defaults are not applied to already created GPGME contexts.
+
+ This function returns the error code `GPG_ERR_NO_ERROR' if
+ successful, or an eror code on failure.
+
+ The functions `gpgme_ctx_get_engine_info' and
+`gpgme_ctx_set_engine_info' can be used to change the engine
+configuration per context. *Note Crypto Engine::.
+
+
+File: gpgme.info, Node: OpenPGP, Next: Cryptographic Message Syntax, Prev: Engine Configuration, Up: Protocols and Engines
+
+3.4 OpenPGP
+===========
+
+OpenPGP is implemented by GnuPG, the GNU Privacy Guard. This is the
+first protocol that was supported by GPGME.
+
+ The OpenPGP protocol is specified by `GPGME_PROTOCOL_OpenPGP'.
+
+
+File: gpgme.info, Node: Cryptographic Message Syntax, Prev: OpenPGP, Up: Protocols and Engines
+
+3.5 Cryptographic Message Syntax
+================================
+
+CMS is implemented by GpgSM, the S/MIME implementation for GnuPG.
+
+ The CMS protocol is specified by `GPGME_PROTOCOL_CMS'.
+
+
+File: gpgme.info, Node: Algorithms, Next: Error Handling, Prev: Protocols and Engines, Up: Top
+
+4 Algorithms
+************
+
+The crypto backends support a variety of algorithms used in public key
+cryptography.(1) The following sections list the identifiers used to
+denote such an algorithm.
+
+* Menu:
+
+* Public Key Algorithms:: A list of all public key algorithms.
+* Hash Algorithms:: A list of all hash algorithms.
+
+ ---------- Footnotes ----------
+
+ (1) Some engines also provide symmetric only encryption; see the
+description of the encryption function on how to use this.
+
+
+File: gpgme.info, Node: Public Key Algorithms, Next: Hash Algorithms, Up: Algorithms
+
+4.1 Public Key Algorithms
+=========================
+
+Public key algorithms are used for encryption, decryption, signing and
+verification of signatures.
+
+ -- Data type: enum gpgme_pubkey_algo_t
+ The `gpgme_pubkey_algo_t' type specifies the set of all public key
+ algorithms that are supported by GPGME. Possible values are:
+
+ `GPGME_PK_RSA'
+ This value indicates the RSA (Rivest, Shamir, Adleman)
+ algorithm.
+
+ `GPGME_PK_RSA_E'
+ Deprecated. This value indicates the RSA (Rivest, Shamir,
+ Adleman) algorithm for encryption and decryption only.
+
+ `GPGME_PK_RSA_S'
+ Deprecated. This value indicates the RSA (Rivest, Shamir,
+ Adleman) algorithm for signing and verification only.
+
+ `GPGME_PK_DSA'
+ This value indicates DSA, the Digital Signature Algorithm.
+
+ `GPGME_PK_ELG'
+ This value indicates ElGamal.
+
+ `GPGME_PK_ELG_E'
+ This value also indicates ElGamal and is used specifically in
+ GnuPG.
+
+ `GPGME_PK_ELG_E'
+ This value also indicates ElGamal and is used specifically in
+ GnuPG.
+
+ `GPGME_PK_ECDSA'
+ This value indicates ECDSA, the Elliptic Curve Digital
+ Signature Algorithm as defined by FIPS 186-2.
+
+ `GPGME_PK_ECDH'
+ This value indicates ECDH, the Eliptic Curve Diffie-Hellmann
+ encryption algorithm as defined by the ECC in OpenPGP draft.
+
+
+ -- Function: const char * gpgme_pubkey_algo_name
+ (gpgme_pubkey_algo_t ALGO)
+ The function `gpgme_pubkey_algo_name' returns a pointer to a
+ statically allocated string containing a description of the public
+ key algorithm ALGO. This string can be used to output the name of
+ the public key algorithm to the user.
+
+ If ALGO is not a valid public key algorithm, `NULL' is returned.
+
+
+File: gpgme.info, Node: Hash Algorithms, Prev: Public Key Algorithms, Up: Algorithms
+
+4.2 Hash Algorithms
+===================
+
+Hash (message digest) algorithms are used to compress a long message to
+make it suitable for public key cryptography.
+
+ -- Data type: enum gpgme_hash_algo_t
+ The `gpgme_hash_algo_t' type specifies the set of all hash
+ algorithms that are supported by GPGME. Possible values are:
+
+ `GPGME_MD_MD5'
+
+ `GPGME_MD_SHA1'
+
+ `GPGME_MD_RMD160'
+
+ `GPGME_MD_MD2'
+
+ `GPGME_MD_TIGER'
+
+ `GPGME_MD_HAVAL'
+
+ `GPGME_MD_SHA256'
+
+ `GPGME_MD_SHA384'
+
+ `GPGME_MD_SHA512'
+
+ `GPGME_MD_MD4'
+
+ `GPGME_MD_CRC32'
+
+ `GPGME_MD_CRC32_RFC1510'
+
+ `GPGME_MD_CRC24_RFC2440'
+
+ -- Function: const char * gpgme_hash_algo_name (gpgme_hash_algo_t ALGO)
+ The function `gpgme_hash_algo_name' returns a pointer to a
+ statically allocated string containing a description of the hash
+ algorithm ALGO. This string can be used to output the name of the
+ hash algorithm to the user.
+
+ If ALGO is not a valid hash algorithm, `NULL' is returned.
+
+
+File: gpgme.info, Node: Error Handling, Next: Exchanging Data, Prev: Algorithms, Up: Top
+
+5 Error Handling
+****************
+
+Many functions in GPGME can return an error if they fail. For this
+reason, the application should always catch the error condition and
+take appropriate measures, for example by releasing the resources and
+passing the error up to the caller, or by displaying a descriptive
+message to the user and cancelling the operation.
+
+ Some error values do not indicate a system error or an error in the
+operation, but the result of an operation that failed properly. For
+example, if you try to decrypt a tempered message, the decryption will
+fail. Another error value actually means that the end of a data buffer
+or list has been reached. The following descriptions explain for many
+error codes what they mean usually. Some error values have specific
+meanings if returned by a certain functions. Such cases are described
+in the documentation of those functions.
+
+ GPGME uses the `libgpg-error' library. This allows to share the
+error codes with other components of the GnuPG system, and thus pass
+error values transparently from the crypto engine, or some helper
+application of the crypto engine, to the user. This way no information
+is lost. As a consequence, GPGME does not use its own identifiers for
+error codes, but uses those provided by `libgpg-error'. They usually
+start with `GPG_ERR_'.
+
+ However, GPGME does provide aliases for the functions defined in
+libgpg-error, which might be preferred for name space consistency.
+
+* Menu:
+
+* Error Values:: The error value and what it means.
+* Error Sources:: A list of important error sources.
+* Error Codes:: A list of important error codes.
+* Error Strings:: How to get a descriptive string from a value.
+
+
+File: gpgme.info, Node: Error Values, Next: Error Sources, Up: Error Handling
+
+5.1 Error Values
+================
+
+ -- Data type: gpgme_err_code_t
+ The `gpgme_err_code_t' type is an alias for the `libgpg-error'
+ type `gpg_err_code_t'. The error code indicates the type of an
+ error, or the reason why an operation failed.
+
+ A list of important error codes can be found in the next section.
+
+ -- Data type: gpgme_err_source_t
+ The `gpgme_err_source_t' type is an alias for the `libgpg-error'
+ type `gpg_err_source_t'. The error source has not a precisely
+ defined meaning. Sometimes it is the place where the error
+ happened, sometimes it is the place where an error was encoded
+ into an error value. Usually the error source will give an
+ indication to where to look for the problem. This is not always
+ true, but it is attempted to achieve this goal.
+
+ A list of important error sources can be found in the next section.
+
+ -- Data type: gpgme_error_t
+ The `gpgme_error_t' type is an alias for the `libgpg-error' type
+ `gpg_error_t'. An error value like this has always two
+ components, an error code and an error source. Both together form
+ the error value.
+
+ Thus, the error value can not be directly compared against an error
+ code, but the accessor functions described below must be used.
+ However, it is guaranteed that only 0 is used to indicate success
+ (`GPG_ERR_NO_ERROR'), and that in this case all other parts of the
+ error value are set to 0, too.
+
+ Note that in GPGME, the error source is used purely for
+ diagnostical purposes. Only the error code should be checked to
+ test for a certain outcome of a function. The manual only
+ documents the error code part of an error value. The error source
+ is left unspecified and might be anything.
+
+ -- Function: static inline gpgme_err_code_t gpgme_err_code
+ (gpgme_error_t ERR)
+ The static inline function `gpgme_err_code' returns the
+ `gpgme_err_code_t' component of the error value ERR. This
+ function must be used to extract the error code from an error
+ value in order to compare it with the `GPG_ERR_*' error code
+ macros.
+
+ -- Function: static inline gpgme_err_source_t gpgme_err_source
+ (gpgme_error_t ERR)
+ The static inline function `gpgme_err_source' returns the
+ `gpgme_err_source_t' component of the error value ERR. This
+ function must be used to extract the error source from an error
+ value in order to compare it with the `GPG_ERR_SOURCE_*' error
+ source macros.
+
+ -- Function: static inline gpgme_error_t gpgme_err_make
+ (gpgme_err_source_t SOURCE, gpgme_err_code_t CODE)
+ The static inline function `gpgme_err_make' returns the error
+ value consisting of the error source SOURCE and the error code
+ CODE.
+
+ This function can be used in callback functions to construct an
+ error value to return it to the library.
+
+ -- Function: static inline gpgme_error_t gpgme_error
+ (gpgme_err_code_t CODE)
+ The static inline function `gpgme_error' returns the error value
+ consisting of the default error source and the error code CODE.
+
+ For GPGME applications, the default error source is
+ `GPG_ERR_SOURCE_USER_1'. You can define
+ `GPGME_ERR_SOURCE_DEFAULT' before including `gpgme.h' to change
+ this default.
+
+ This function can be used in callback functions to construct an
+ error value to return it to the library.
+
+ The `libgpg-error' library provides error codes for all system error
+numbers it knows about. If ERR is an unknown error number, the error
+code `GPG_ERR_UNKNOWN_ERRNO' is used. The following functions can be
+used to construct error values from system errnor numbers.
+
+ -- Function: gpgme_error_t gpgme_err_make_from_errno
+ (gpgme_err_source_t SOURCE, int ERR)
+ The function `gpgme_err_make_from_errno' is like `gpgme_err_make',
+ but it takes a system error like `errno' instead of a
+ `gpgme_err_code_t' error code.
+
+ -- Function: gpgme_error_t gpgme_error_from_errno (int ERR)
+ The function `gpgme_error_from_errno' is like `gpgme_error', but
+ it takes a system error like `errno' instead of a
+ `gpgme_err_code_t' error code.
+
+ Sometimes you might want to map system error numbers to error codes
+directly, or map an error code representing a system error back to the
+system error number. The following functions can be used to do that.
+
+ -- Function: gpgme_err_code_t gpgme_err_code_from_errno (int ERR)
+ The function `gpgme_err_code_from_errno' returns the error code
+ for the system error ERR. If ERR is not a known system error, the
+ function returns `GPG_ERR_UNKNOWN_ERRNO'.
+
+ -- Function: int gpgme_err_code_to_errno (gpgme_err_code_t ERR)
+ The function `gpgme_err_code_to_errno' returns the system error
+ for the error code ERR. If ERR is not an error code representing
+ a system error, or if this system error is not defined on this
+ system, the function returns `0'.
+
+
+File: gpgme.info, Node: Error Sources, Next: Error Codes, Prev: Error Values, Up: Error Handling
+
+5.2 Error Sources
+=================
+
+The library `libgpg-error' defines an error source for every component
+of the GnuPG system. The error source part of an error value is not
+well defined. As such it is mainly useful to improve the diagnostic
+error message for the user.
+
+ If the error code part of an error value is `0', the whole error
+value will be `0'. In this case the error source part is of course
+`GPG_ERR_SOURCE_UNKNOWN'.
+
+ The list of error sources that might occur in applications using
+GPGME is:
+
+`GPG_ERR_SOURCE_UNKNOWN'
+ The error source is not known. The value of this error source is
+ `0'.
+
+`GPG_ERR_SOURCE_GPGME'
+ The error source is GPGME itself. This is the default for errors
+ that occur in the GPGME library.
+
+`GPG_ERR_SOURCE_GPG'
+ The error source is GnuPG, which is the crypto engine used for the
+ OpenPGP protocol.
+
+`GPG_ERR_SOURCE_GPGSM'
+ The error source is GPGSM, which is the crypto engine used for the
+ CMS protocol.
+
+`GPG_ERR_SOURCE_GCRYPT'
+ The error source is `libgcrypt', which is used by crypto engines
+ to perform cryptographic operations.
+
+`GPG_ERR_SOURCE_GPGAGENT'
+ The error source is `gpg-agent', which is used by crypto engines
+ to perform operations with the secret key.
+
+`GPG_ERR_SOURCE_PINENTRY'
+ The error source is `pinentry', which is used by `gpg-agent' to
+ query the passphrase to unlock a secret key.
+
+`GPG_ERR_SOURCE_SCD'
+ The error source is the SmartCard Daemon, which is used by
+ `gpg-agent' to delegate operations with the secret key to a
+ SmartCard.
+
+`GPG_ERR_SOURCE_KEYBOX'
+ The error source is `libkbx', a library used by the crypto engines
+ to manage local keyrings.
+
+`GPG_ERR_SOURCE_USER_1'
+
+`GPG_ERR_SOURCE_USER_2'
+
+`GPG_ERR_SOURCE_USER_3'
+
+`GPG_ERR_SOURCE_USER_4'
+ These error sources are not used by any GnuPG component and can be
+ used by other software. For example, applications using GPGME can
+ use them to mark error values coming from callback handlers. Thus
+ `GPG_ERR_SOURCE_USER_1' is the default for errors created with
+ `gpgme_error' and `gpgme_error_from_errno', unless you define
+ `GPGME_ERR_SOURCE_DEFAULT' before including `gpgme.h'.
+
+
+File: gpgme.info, Node: Error Codes, Next: Error Strings, Prev: Error Sources, Up: Error Handling
+
+5.3 Error Codes
+===============
+
+The library `libgpg-error' defines many error values. Most of them are
+not used by `GPGME' directly, but might be returned by GPGME because it
+received them from the crypto engine. The below list only includes
+such error codes that have a specific meaning in `GPGME', or which are
+so common that you should know about them.
+
+`GPG_ERR_EOF'
+ This value indicates the end of a list, buffer or file.
+
+`GPG_ERR_NO_ERROR'
+ This value indicates success. The value of this error code is
+ `0'. Also, it is guaranteed that an error value made from the
+ error code `0' will be `0' itself (as a whole). This means that
+ the error source information is lost for this error code, however,
+ as this error code indicates that no error occured, this is
+ generally not a problem.
+
+`GPG_ERR_GENERAL'
+ This value means that something went wrong, but either there is not
+ enough information about the problem to return a more useful error
+ value, or there is no separate error value for this type of
+ problem.
+
+`GPG_ERR_ENOMEM'
+ This value means that an out-of-memory condition occurred.
+
+`GPG_ERR_E...'
+ System errors are mapped to GPG_ERR_FOO where FOO is the symbol for
+ the system error.
+
+`GPG_ERR_INV_VALUE'
+ This value means that some user provided data was out of range.
+ This can also refer to objects. For example, if an empty
+ `gpgme_data_t' object was expected, but one containing data was
+ provided, this error value is returned.
+
+`GPG_ERR_UNUSABLE_PUBKEY'
+ This value means that some recipients for a message were invalid.
+
+`GPG_ERR_UNUSABLE_SECKEY'
+ This value means that some signers were invalid.
+
+`GPG_ERR_NO_DATA'
+ This value means that a `gpgme_data_t' object which was expected
+ to have content was found empty.
+
+`GPG_ERR_CONFLICT'
+ This value means that a conflict of some sort occurred.
+
+`GPG_ERR_NOT_IMPLEMENTED'
+ This value indicates that the specific function (or operation) is
+ not implemented. This error should never happen. It can only
+ occur if you use certain values or configuration options which do
+ not work, but for which we think that they should work at some
+ later time.
+
+`GPG_ERR_DECRYPT_FAILED'
+ This value indicates that a decryption operation was unsuccessful.
+
+`GPG_ERR_BAD_PASSPHRASE'
+ This value means that the user did not provide a correct passphrase
+ when requested.
+
+`GPG_ERR_CANCELED'
+ This value means that the operation was canceled.
+
+`GPG_ERR_INV_ENGINE'
+ This value means that the engine that implements the desired
+ protocol is currently not available. This can either be because
+ the sources were configured to exclude support for this engine, or
+ because the engine is not installed properly.
+
+`GPG_ERR_AMBIGUOUS_NAME'
+ This value indicates that a user ID or other specifier did not
+ specify a unique key.
+
+`GPG_ERR_WRONG_KEY_USAGE'
+ This value indicates that a key is not used appropriately.
+
+`GPG_ERR_CERT_REVOKED'
+ This value indicates that a key signature was revoced.
+
+`GPG_ERR_CERT_EXPIRED'
+ This value indicates that a key signature expired.
+
+`GPG_ERR_NO_CRL_KNOWN'
+ This value indicates that no certificate revocation list is known
+ for the certificate.
+
+`GPG_ERR_NO_POLICY_MATCH'
+ This value indicates that a policy issue occured.
+
+`GPG_ERR_NO_SECKEY'
+ This value indicates that no secret key for the user ID is
+ available.
+
+`GPG_ERR_MISSING_CERT'
+ This value indicates that a key could not be imported because the
+ issuer certificate is missing.
+
+`GPG_ERR_BAD_CERT_CHAIN'
+ This value indicates that a key could not be imported because its
+ certificate chain is not good, for example it could be too long.
+
+`GPG_ERR_UNSUPPORTED_ALGORITHM'
+ This value means a verification failed because the cryptographic
+ algorithm is not supported by the crypto backend.
+
+`GPG_ERR_BAD_SIGNATURE'
+ This value means a verification failed because the signature is
+ bad.
+
+`GPG_ERR_NO_PUBKEY'
+ This value means a verification failed because the public key is
+ not available.
+
+`GPG_ERR_USER_1'
+
+`GPG_ERR_USER_2'
+
+`...'
+
+`GPG_ERR_USER_16'
+ These error codes are not used by any GnuPG component and can be
+ freely used by other software. Applications using GPGME might use
+ them to mark specific errors returned by callback handlers if no
+ suitable error codes (including the system errors) for these
+ errors exist already.
+
+
+File: gpgme.info, Node: Error Strings, Prev: Error Codes, Up: Error Handling
+
+5.4 Error Strings
+=================
+
+ -- Function: const char * gpgme_strerror (gpgme_error_t ERR)
+ The function `gpgme_strerror' returns a pointer to a statically
+ allocated string containing a description of the error code
+ contained in the error value ERR. This string can be used to
+ output a diagnostic message to the user.
+
+ This function is not thread safe. Use `gpgme_strerror_r' in
+ multi-threaded programs.
+
+ -- Function: int gpgme_strerror_r (gpgme_error_t ERR, char *BUF,
+ size_t BUFLEN)
+ The function `gpgme_strerror_r' returns the error string for ERR
+ in the user-supplied buffer BUF of size BUFLEN. This function is,
+ in contrast to `gpgme_strerror', thread-safe if a thread-safe
+ `strerror_r' function is provided by the system. If the function
+ succeeds, 0 is returned and BUF contains the string describing the
+ error. If the buffer was not large enough, ERANGE is returned and
+ BUF contains as much of the beginning of the error string as fits
+ into the buffer.
+
+ -- Function: const char * gpgme_strsource (gpgme_error_t ERR)
+ The function `gpgme_strerror' returns a pointer to a statically
+ allocated string containing a description of the error source
+ contained in the error value ERR. This string can be used to
+ output a diagnostic message to the user.
+
+ The following example illustrates the use of `gpgme_strerror':
+
+ gpgme_ctx_t ctx;
+ gpgme_error_t err = gpgme_new (&ctx);
+ if (err)
+ {
+ fprintf (stderr, "%s: creating GpgME context failed: %s: %s\n",
+ argv[0], gpgme_strsource (err), gpgme_strerror (err));
+ exit (1);
+ }
+
+
+File: gpgme.info, Node: Exchanging Data, Next: Contexts, Prev: Error Handling, Up: Top
+
+6 Exchanging Data
+*****************
+
+A lot of data has to be exchanged between the user and the crypto
+engine, like plaintext messages, ciphertext, signatures and information
+about the keys. The technical details about exchanging the data
+information are completely abstracted by GPGME. The user provides and
+receives the data via `gpgme_data_t' objects, regardless of the
+communication protocol between GPGME and the crypto engine in use.
+
+ -- Data type: gpgme_data_t
+ The `gpgme_data_t' type is a handle for a container for generic
+ data, which is used by GPGME to exchange data with the user.
+
+ `gpgme_data_t' objects do not provide notifications on events. It
+is assumed that read and write operations are blocking until data is
+available. If this is undesirable, the application must ensure that
+all GPGME data operations always have data available, for example by
+using memory buffers or files rather than pipes or sockets. This might
+be relevant, for example, if the external event loop mechanism is used.
+
+* Menu:
+
+* Creating Data Buffers:: Creating new data buffers.
+* Destroying Data Buffers:: Releasing data buffers.
+* Manipulating Data Buffers:: Operations on data buffers.
+
+
+File: gpgme.info, Node: Creating Data Buffers, Next: Destroying Data Buffers, Up: Exchanging Data
+
+6.1 Creating Data Buffers
+=========================
+
+Data objects can be based on memory, files, or callback functions
+provided by the user. Not all operations are supported by all objects.
+
+* Menu:
+
+* Memory Based Data Buffers:: Creating memory based data buffers.
+* File Based Data Buffers:: Creating file based data buffers.
+* Callback Based Data Buffers:: Creating callback based data buffers.
+
+
+File: gpgme.info, Node: Memory Based Data Buffers, Next: File Based Data Buffers, Up: Creating Data Buffers
+
+6.1.1 Memory Based Data Buffers
+-------------------------------
+
+Memory based data objects store all data in allocated memory. This is
+convenient, but only practical for an amount of data that is a fraction
+of the available physical memory. The data has to be copied from its
+source and to its destination, which can often be avoided by using one
+of the other data object
+
+ -- Function: gpgme_error_t gpgme_data_new (gpgme_data_t *DH)
+ The function `gpgme_data_new' creates a new `gpgme_data_t' object
+ and returns a handle for it in DH. The data object is memory
+ based and initially empty.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the data
+ object was successfully created, `GPG_ERR_INV_VALUE' if DH is not
+ a valid pointer, and `GPG_ERR_ENOMEM' if not enough memory is
+ available.
+
+ -- Function: gpgme_error_t gpgme_data_new_from_mem (gpgme_data_t *DH,
+ const char *BUFFER, size_t SIZE, int COPY)
+ The function `gpgme_data_new_from_mem' creates a new
+ `gpgme_data_t' object and fills it with SIZE bytes starting from
+ BUFFER.
+
+ If COPY is not zero, a private copy of the data is made. If COPY
+ is zero, the data is taken from the specified buffer as needed,
+ and the user has to ensure that the buffer remains valid for the
+ whole life span of the data object.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the data
+ object was successfully created, `GPG_ERR_INV_VALUE' if DH or
+ BUFFER is not a valid pointer, and `GPG_ERR_ENOMEM' if not enough
+ memory is available.
+
+ -- Function: gpgme_error_t gpgme_data_new_from_file (gpgme_data_t *DH,
+ const char *FILENAME, int COPY)
+ The function `gpgme_data_new_from_file' creates a new
+ `gpgme_data_t' object and fills it with the content of the file
+ FILENAME.
+
+ If COPY is not zero, the whole file is read in at initialization
+ time and the file is not used anymore after that. This is the only
+ mode supported currently. Later, a value of zero for COPY might
+ cause all reads to be delayed until the data is needed, but this is
+ not yet implemented.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the data
+ object was successfully created, `GPG_ERR_INV_VALUE' if DH or
+ FILENAME is not a valid pointer, `GPG_ERR_NOT_IMPLEMENTED' if CODE
+ is zero, and `GPG_ERR_ENOMEM' if not enough memory is available.
+
+ -- Function: gpgme_error_t gpgme_data_new_from_filepart
+ (gpgme_data_t *DH, const char *FILENAME, FILE *FP,
+ off_t OFFSET, size_t LENGTH)
+ The function `gpgme_data_new_from_filepart' creates a new
+ `gpgme_data_t' object and fills it with a part of the file
+ specified by FILENAME or FP.
+
+ Exactly one of FILENAME and FP must be non-zero, the other must be
+ zero. The argument that is not zero specifies the file from which
+ LENGTH bytes are read into the data object, starting from OFFSET.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the data
+ object was successfully created, `GPG_ERR_INV_VALUE' if DH and
+ exactly one of FILENAME and FP is not a valid pointer, and
+ `GPG_ERR_ENOMEM' if not enough memory is available.
+
+
+File: gpgme.info, Node: File Based Data Buffers, Next: Callback Based Data Buffers, Prev: Memory Based Data Buffers, Up: Creating Data Buffers
+
+6.1.2 File Based Data Buffers
+-----------------------------
+
+File based data objects operate directly on file descriptors or
+streams. Only a small amount of data is stored in core at any time, so
+the size of the data objects is not limited by GPGME.
+
+ -- Function: gpgme_error_t gpgme_data_new_from_fd (gpgme_data_t *DH,
+ int FD)
+ The function `gpgme_data_new_from_fd' creates a new `gpgme_data_t'
+ object and uses the file descriptor FD to read from (if used as an
+ input data object) and write to (if used as an output data object).
+
+ When using the data object as an input buffer, the function might
+ read a bit more from the file descriptor than is actually needed
+ by the crypto engine in the desired operation because of internal
+ buffering.
+
+ Note that GPGME assumes that the file descriptor is set to blocking
+ mode. Errors during I/O operations, except for EINTR, are usually
+ fatal for crypto operations.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the data
+ object was successfully created, and `GPG_ERR_ENOMEM' if not
+ enough memory is available.
+
+ -- Function: gpgme_error_t gpgme_data_new_from_stream
+ (gpgme_data_t *DH, FILE *STREAM)
+ The function `gpgme_data_new_from_stream' creates a new
+ `gpgme_data_t' object and uses the I/O stream STREAM to read from
+ (if used as an input data object) and write to (if used as an
+ output data object).
+
+ When using the data object as an input buffer, the function might
+ read a bit more from the stream than is actually needed by the
+ crypto engine in the desired operation because of internal
+ buffering.
+
+ Note that GPGME assumes that the stream is in blocking mode.
+ Errors during I/O operations, except for EINTR, are usually fatal
+ for crypto operations.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the data
+ object was successfully created, and `GPG_ERR_ENOMEM' if not
+ enough memory is available.
+
+
+File: gpgme.info, Node: Callback Based Data Buffers, Prev: File Based Data Buffers, Up: Creating Data Buffers
+
+6.1.3 Callback Based Data Buffers
+---------------------------------
+
+If neither memory nor file based data objects are a good fit for your
+application, you can implement the functions a data object provides
+yourself and create a data object from these callback functions.
+
+ -- Data type: ssize_t (*gpgme_data_read_cb_t) (void *HANDLE,
+void *BUFFER, size_t SIZE)
+ The `gpgme_data_read_cb_t' type is the type of functions which
+ GPGME calls if it wants to read data from a user-implemented data
+ object. The function should read up to SIZE bytes from the
+ current read position into the space starting at BUFFER. The
+ HANDLE is provided by the user at data object creation time.
+
+ Note that GPGME assumes that the read blocks until data is
+ available. Errors during I/O operations, except for EINTR, are
+ usually fatal for crypto operations.
+
+ The function should return the number of bytes read, 0 on EOF, and
+ -1 on error. If an error occurs, ERRNO should be set to describe
+ the type of the error.
+
+ -- Data type: ssize_t (*gpgme_data_write_cb_t) (void *HANDLE,
+const void *BUFFER, size_t SIZE)
+ The `gpgme_data_write_cb_t' type is the type of functions which
+ GPGME calls if it wants to write data to a user-implemented data
+ object. The function should write up to SIZE bytes to the current
+ write position from the space starting at BUFFER. The HANDLE is
+ provided by the user at data object creation time.
+
+ Note that GPGME assumes that the write blocks until data is
+ available. Errors during I/O operations, except for EINTR, are
+ usually fatal for crypto operations.
+
+ The function should return the number of bytes written, and -1 on
+ error. If an error occurs, ERRNO should be set to describe the
+ type of the error.
+
+ -- Data type: off_t (*gpgme_data_seek_cb_t) (void *HANDLE,
+off_t OFFSET, int WHENCE)
+ The `gpgme_data_seek_cb_t' type is the type of functions which
+ GPGME calls if it wants to change the current read/write position
+ in a user-implemented data object, just like the `lseek' function.
+
+ The function should return the new read/write position, and -1 on
+ error. If an error occurs, ERRNO should be set to describe the
+ type of the error.
+
+ -- Data type: void (*gpgme_data_release_cb_t) (void *HANDLE)
+ The `gpgme_data_release_cb_t' type is the type of functions which
+ GPGME calls if it wants to destroy a user-implemented data object.
+ The HANDLE is provided by the user at data object creation time.
+
+ -- Data type: struct gpgme_data_cbs
+ This structure is used to store the data callback interface
+ functions described above. It has the following members:
+
+ `gpgme_data_read_cb_t read'
+ This is the function called by GPGME to read data from the
+ data object. It is only required for input data object.
+
+ `gpgme_data_write_cb_t write'
+ This is the function called by GPGME to write data to the
+ data object. It is only required for output data object.
+
+ `gpgme_data_seek_cb_t seek'
+ This is the function called by GPGME to change the current
+ read/write pointer in the data object (if available). It is
+ optional.
+
+ `gpgme_data_release_cb_t release'
+ This is the function called by GPGME to release a data
+ object. It is optional.
+
+ -- Function: gpgme_error_t gpgme_data_new_from_cbs (gpgme_data_t *DH,
+ gpgme_data_cbs_t CBS, void *HANDLE)
+ The function `gpgme_data_new_from_cbs' creates a new
+ `gpgme_data_t' object and uses the user-provided callback functions
+ to operate on the data object.
+
+ The handle HANDLE is passed as first argument to the callback
+ functions. This can be used to identify this data object.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the data
+ object was successfully created, and `GPG_ERR_ENOMEM' if not
+ enough memory is available.
+
+ The following interface is deprecated and only provided for backward
+compatibility. Don't use it. It will be removed in a future version
+of GPGME.
+
+ -- Function: gpgme_error_t gpgme_data_new_with_read_cb
+ (gpgme_data_t *DH, int (*READFUNC) (void *HOOK, char *BUFFER,
+ size_t COUNT, size_t *NREAD), void *HOOK_VALUE)
+ The function `gpgme_data_new_with_read_cb' creates a new
+ `gpgme_data_t' object and uses the callback function READFUNC to
+ retrieve the data on demand. As the callback function can supply
+ the data in any way it wants, this is the most flexible data type
+ GPGME provides. However, it can not be used to write data.
+
+ The callback function receives HOOK_VALUE as its first argument
+ whenever it is invoked. It should return up to COUNT bytes in
+ BUFFER, and return the number of bytes actually read in NREAD. It
+ may return `0' in NREAD if no data is currently available. To
+ indicate `EOF' the function should return with an error code of
+ `-1' and set NREAD to `0'. The callback function may support to
+ reset its internal read pointer if it is invoked with BUFFER and
+ NREAD being `NULL' and COUNT being `0'.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the data
+ object was successfully created, `GPG_ERR_INV_VALUE' if DH or
+ READFUNC is not a valid pointer, and `GPG_ERR_ENOMEM' if not
+ enough memory is available.
+
+
+File: gpgme.info, Node: Destroying Data Buffers, Next: Manipulating Data Buffers, Prev: Creating Data Buffers, Up: Exchanging Data
+
+6.2 Destroying Data Buffers
+===========================
+
+ -- Function: void gpgme_data_release (gpgme_data_t DH)
+ The function `gpgme_data_release' destroys the data object with
+ the handle DH. It releases all associated resources that were not
+ provided by the user in the first place.
+
+ -- Function: char * gpgme_data_release_and_get_mem (gpgme_data_t DH,
+ size_t *LENGTH)
+ The function `gpgme_data_release_and_get_mem' is like
+ `gpgme_data_release', except that it returns the data buffer and
+ its length that was provided by the object.
+
+ The user has to release the buffer with `gpgme_free'. In case the
+ user provided the data buffer in non-copy mode, a copy will be
+ made for this purpose.
+
+ In case an error returns, or there is no suitable data buffer that
+ can be returned to the user, the function will return `NULL'. In
+ any case, the data object DH is destroyed.
+
+ -- Function: void gpgme_free (void *BUFFER)
+ The function `gpgme_free' releases the memory returned by
+ `gpgme_data_release_and_get_mem'. It should be used instead of
+ the system libraries `free' function in case different allocators
+ are used in a single program.
+
+
+File: gpgme.info, Node: Manipulating Data Buffers, Prev: Destroying Data Buffers, Up: Exchanging Data
+
+6.3 Manipulating Data Buffers
+=============================
+
+Data buffers contain data and meta-data. The following operations can
+be used to manipulate both.
+
+* Menu:
+
+* Data Buffer I/O Operations:: I/O operations on data buffers.
+* Data Buffer Meta-Data:: Meta-data manipulation of data buffers.
+
+
+File: gpgme.info, Node: Data Buffer I/O Operations, Next: Data Buffer Meta-Data, Up: Manipulating Data Buffers
+
+6.3.1 Data Buffer I/O Operations
+--------------------------------
+
+ -- Function: ssize_t gpgme_data_read (gpgme_data_t DH, void *BUFFER,
+ size_t LENGTH)
+ The function `gpgme_data_read' reads up to LENGTH bytes from the
+ data object with the handle DH into the space starting at BUFFER.
+
+ If no error occurs, the actual amount read is returned. If the
+ end of the data object is reached, the function returns 0.
+
+ In all other cases, the function returns -1 and sets ERRNO.
+
+ -- Function: ssize_t gpgme_data_write (gpgme_data_t DH,
+ const void *BUFFER, size_t SIZE)
+ The function `gpgme_data_write' writes up to SIZE bytes starting
+ from BUFFER into the data object with the handle DH at the current
+ write position.
+
+ The function returns the number of bytes actually written, or -1
+ if an error occurs. If an error occurs, ERRNO is set.
+
+ -- Function: off_t gpgme_data_seek (gpgme_data_t DH, off_t OFFSET,
+ int WHENCE)
+ The function `gpgme_data_seek' changes the current read/write
+ position.
+
+ The WHENCE argument specifies how the OFFSET should be
+ interpreted. It must be one of the following symbolic constants:
+
+ `SEEK_SET'
+ Specifies that OFFSET is a count of characters from the
+ beginning of the data object.
+
+ `SEEK_CUR'
+ Specifies that OFFSET is a count of characters from the
+ current file position. This count may be positive or
+ negative.
+
+ `SEEK_END'
+ Specifies that OFFSET is a count of characters from the end of
+ the data object. A negative count specifies a position
+ within the current extent of the data object; a positive
+ count specifies a position past the current end. If you set
+ the position past the current end, and actually write data,
+ you will extend the data object with zeros up to that
+ position.
+
+ If successful, the function returns the resulting file position,
+ measured in bytes from the beginning of the data object. You can
+ use this feature together with `SEEK_CUR' to read the current
+ read/write position.
+
+ If the function fails, -1 is returned and ERRNO is set.
+
+ The following function is deprecated and should not be used. It will
+be removed in a future version of GPGME.
+
+ -- Function: gpgme_error_t gpgme_data_rewind (gpgme_data_t DH)
+ The function `gpgme_data_rewind' is equivalent to:
+
+ return (gpgme_data_seek (dh, 0, SEEK_SET) == -1)
+ ? gpgme_error_from_errno (errno) : 0;
+
+
+File: gpgme.info, Node: Data Buffer Meta-Data, Prev: Data Buffer I/O Operations, Up: Manipulating Data Buffers
+
+6.3.2 Data Buffer Meta-Data
+---------------------------
+
+ -- Function: char * gpgme_data_get_file_name (gpgme_data_t DH)
+ The function `gpgme_data_get_file_name' returns a pointer to a
+ string containing the file name associated with the data object.
+ The file name will be stored in the output when encrypting or
+ signing the data and will be returned to the user when decrypting
+ or verifying the output data.
+
+ If no error occurs, the string containing the file name is
+ returned. Otherwise, `NULL' will be returned.
+
+ -- Function: gpgme_error_t gpgme_data_set_file_name (gpgme_data_t DH,
+ const char *FILE_NAME)
+ The function `gpgme_data_set_file_name' sets the file name
+ associated with the data object. The file name will be stored in
+ the output when encrypting or signing the data and will be
+ returned to the user when decrypting or verifying the output data.
+
+ The function returns the error code `GPG_ERR_INV_VALUE' if DH is
+ not a valid pointer and `GPG_ERR_ENOMEM' if not enough memory is
+ available.
+
+ -- Data type: enum gpgme_data_encoding_t
+ The `gpgme_data_encoding_t' type specifies the encoding of a
+ `gpgme_data_t' object. For input data objects, the encoding is
+ useful to give the backend a hint on the type of data. For output
+ data objects, the encoding can specify the output data format on
+ certain operations. Please note that not all backends support all
+ encodings on all operations. The following data types are
+ available:
+
+ `GPGME_DATA_ENCODING_NONE'
+ This specifies that the encoding is not known. This is the
+ default for a new data object. The backend will try its best
+ to detect the encoding automatically.
+
+ `GPGME_DATA_ENCODING_BINARY'
+ This specifies that the data is encoding in binary form; i.e.
+ there is no special encoding.
+
+ `GPGME_DATA_ENCODING_BASE64'
+ This specifies that the data is encoded using the Base-64
+ encoding scheme as used by MIME and other protocols.
+
+ `GPGME_DATA_ENCODING_ARMOR'
+ This specifies that the data is encoded in an armored form as
+ used by OpenPGP and PEM.
+
+ `GPGME_DATA_ENCODING_URL'
+ The data is a list of linefeed delimited URLs. This is only
+ useful with `gpgme_op_import'.
+
+ `GPGME_DATA_ENCODING_URL0'
+ The data is a list of binary zero delimited URLs. This is
+ only useful with `gpgme_op_import'.
+
+ `GPGME_DATA_ENCODING_URLESC'
+ The data is a list of linefeed delimited URLs with all
+ control and space characters percent escaped. This mode is
+ is not yet implemented.
+
+
+ -- Function: gpgme_data_encoding_t gpgme_data_get_encoding
+ (gpgme_data_t DH)
+ The function `gpgme_data_get_encoding' returns the encoding of the
+ data object with the handle DH. If DH is not a valid pointer
+ (e.g. `NULL') `GPGME_DATA_ENCODING_NONE' is returned.
+
+ -- Function: gpgme_error_t gpgme_data_set_encoding
+ (gpgme_data_t DH, gpgme_data_encoding_t ENC)
+ The function `gpgme_data_set_encoding' changes the encoding of the
+ data object with the handle DH to ENC.
+
+
+File: gpgme.info, Node: Contexts, Next: UI Server Protocol, Prev: Exchanging Data, Up: Top
+
+7 Contexts
+**********
+
+All cryptographic operations in GPGME are performed within a context,
+which contains the internal state of the operation as well as
+configuration parameters. By using several contexts you can run
+several cryptographic operations in parallel, with different
+configuration.
+
+ -- Data type: gpgme_ctx_t
+ The `gpgme_ctx_t' type is a handle for a GPGME context, which is
+ used to hold the configuration, status and result of cryptographic
+ operations.
+
+* Menu:
+
+* Creating Contexts:: Creating new GPGME contexts.
+* Destroying Contexts:: Releasing GPGME contexts.
+* Result Management:: Managing the result of crypto operations.
+* Context Attributes:: Setting properties of a context.
+* Key Management:: Managing keys with GPGME.
+* Trust Item Management:: Managing trust items with GPGME.
+* Crypto Operations:: Using a context for cryptography.
+* Run Control:: Controlling how operations are run.
+
+
+File: gpgme.info, Node: Creating Contexts, Next: Destroying Contexts, Up: Contexts
+
+7.1 Creating Contexts
+=====================
+
+ -- Function: gpgme_error_t gpgme_new (gpgme_ctx_t *CTX)
+ The function `gpgme_new' creates a new `gpgme_ctx_t' object and
+ returns a handle for it in CTX.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ context was successfully created, `GPG_ERR_INV_VALUE' if CTX is
+ not a valid pointer, and `GPG_ERR_ENOMEM' if not enough memory is
+ available. Also, it returns `GPG_ERR_NOT_OPERATIONAL' if
+ `gpgme_check_version' was not called to initialize GPGME, and
+ `GPG_ERR_SELFTEST_FAILED' if a selftest failed. Currently, the
+ only selftest is for Windows MingW32 targets to see if
+ `-mms-bitfields' was used (as required).
+
+
+File: gpgme.info, Node: Destroying Contexts, Next: Result Management, Prev: Creating Contexts, Up: Contexts
+
+7.2 Destroying Contexts
+=======================
+
+ -- Function: void gpgme_release (gpgme_ctx_t CTX)
+ The function `gpgme_release' destroys the context with the handle
+ CTX and releases all associated resources.
+
+
+File: gpgme.info, Node: Result Management, Next: Context Attributes, Prev: Destroying Contexts, Up: Contexts
+
+7.3 Result Management
+=====================
+
+The detailed result of an operation is returned in operation-specific
+structures such as `gpgme_decrypt_result_t'. The corresponding
+retrieval functions such as `gpgme_op_decrypt_result' provide static
+access to the results after an operation completes. The following
+interfaces make it possible to detach a result structure from its
+associated context and give it a lifetime beyond that of the current
+operation or context.
+
+ -- Function: void gpgme_result_ref (void *RESULT)
+ The function `gpgme_result_ref' acquires an additional reference
+ for the result RESULT, which may be of any type
+ `gpgme_*_result_t'. As long as the user holds a reference, the
+ result structure is guaranteed to be valid and unmodified.
+
+ -- Function: void gpgme_result_unref (void *RESULT)
+ The function `gpgme_result_unref' releases a reference for the
+ result RESULT. If this was the last reference, the result
+ structure will be destroyed and all resources associated to it
+ will be released.
+
+ Note that a context may hold its own references to result structures,
+typically until the context is destroyed or the next operation is
+started. In fact, these references are accessed through the
+`gpgme_op_*_result' functions.
+
+
+File: gpgme.info, Node: Context Attributes, Next: Key Management, Prev: Result Management, Up: Contexts
+
+7.4 Context Attributes
+======================
+
+* Menu:
+
+* Protocol Selection:: Selecting the protocol used by a context.
+* Crypto Engine:: Configuring the crypto engine.
+* ASCII Armor:: Requesting ASCII armored output.
+* Text Mode:: Choosing canonical text mode.
+* Included Certificates:: Including a number of certificates.
+* Key Listing Mode:: Selecting key listing mode.
+* Passphrase Callback:: Getting the passphrase from the user.
+* Progress Meter Callback:: Being informed about the progress.
+* Locale:: Setting the locale of a context.
+
+
+File: gpgme.info, Node: Protocol Selection, Next: Crypto Engine, Up: Context Attributes
+
+7.4.1 Protocol Selection
+------------------------
+
+ -- Function: gpgme_error_t gpgme_set_protocol (gpgme_ctx_t CTX,
+ gpgme_protocol_t PROTO)
+ The function `gpgme_set_protocol' sets the protocol used within
+ the context CTX to PROTO. All crypto operations will be performed
+ by the crypto engine configured for that protocol. *Note
+ Protocols and Engines::.
+
+ Setting the protocol with `gpgme_set_protocol' does not check if
+ the crypto engine for that protocol is available and installed
+ correctly. *Note Engine Version Check::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ protocol could be set successfully, and `GPG_ERR_INV_VALUE' if
+ PROTOCOL is not a valid protocol.
+
+ -- Function: gpgme_protocol_t gpgme_get_protocol (gpgme_ctx_t CTX)
+ The function `gpgme_get_protocol' retrieves the protocol currently
+ use with the context CTX.
+
+
+File: gpgme.info, Node: Crypto Engine, Next: ASCII Armor, Prev: Protocol Selection, Up: Context Attributes
+
+7.4.2 Crypto Engine
+-------------------
+
+The following functions can be used to set and retrieve the
+configuration of the crypto engines of a specific context. The default
+can also be retrieved without any particular context. *Note Engine
+Information::. The default can also be changed globally. *Note Engine
+Configuration::.
+
+ -- Function: gpgme_engine_info_t gpgme_ctx_get_engine_info
+ (gpgme_ctx_t CTX)
+ The function `gpgme_ctx_get_engine_info' returns a linked list of
+ engine info structures. Each info structure describes the
+ configuration of one configured backend, as used by the context
+ CTX.
+
+ The result is valid until the next invocation of
+ `gpgme_ctx_set_engine_info' for this particular context.
+
+ This function can not fail.
+
+ -- Function: gpgme_error_t gpgme_ctx_set_engine_info (gpgme_ctx_t CTX,
+ gpgme_protocol_t PROTO, const char *FILE_NAME,
+ const char *HOME_DIR)
+ The function `gpgme_ctx_set_engine_info' changes the configuration
+ of the crypto engine implementing the protocol PROTO for the
+ context CTX.
+
+ FILE_NAME is the file name of the executable program implementing
+ this protocol, and HOME_DIR is the directory name of the
+ configuration directory for this crypto engine. If HOME_DIR is
+ `NULL', the engine's default will be used.
+
+ Currently this function must be used before starting the first
+ crypto operation. It is unspecified if and when the changes will
+ take effect if the function is called after starting the first
+ operation on the context CTX.
+
+ This function returns the error code `GPG_ERR_NO_ERROR' if
+ successful, or an eror code on failure.
+
+
+File: gpgme.info, Node: ASCII Armor, Next: Text Mode, Prev: Crypto Engine, Up: Context Attributes
+
+7.4.3 ASCII Armor
+-----------------
+
+ -- Function: void gpgme_set_armor (gpgme_ctx_t CTX, int YES)
+ The function `gpgme_set_armor' specifies if the output should be
+ ASCII armored. By default, output is not ASCII armored.
+
+ ASCII armored output is disabled if YES is zero, and enabled
+ otherwise.
+
+ -- Function: int gpgme_get_armor (gpgme_ctx_t CTX)
+ The function `gpgme_get_armor' returns 1 if the output is ASCII
+ armored, and `0' if it is not, or if CTX is not a valid pointer.
+
+
+File: gpgme.info, Node: Text Mode, Next: Included Certificates, Prev: ASCII Armor, Up: Context Attributes
+
+7.4.4 Text Mode
+---------------
+
+ -- Function: void gpgme_set_textmode (gpgme_ctx_t CTX, int YES)
+ The function `gpgme_set_textmode' specifies if canonical text mode
+ should be used. By default, text mode is not used.
+
+ Text mode is for example used for the RFC2015 signatures; note that
+ the updated RFC 3156 mandates that the mail user agent does some
+ preparations so that text mode is not needed anymore.
+
+ This option is only relevant to the OpenPGP crypto engine, and
+ ignored by all other engines.
+
+ Canonical text mode is disabled if YES is zero, and enabled
+ otherwise.
+
+ -- Function: int gpgme_get_textmode (gpgme_ctx_t CTX)
+ The function `gpgme_get_textmode' returns 1 if canonical text mode
+ is enabled, and `0' if it is not, or if CTX is not a valid pointer.
+
+
+File: gpgme.info, Node: Included Certificates, Next: Key Listing Mode, Prev: Text Mode, Up: Context Attributes
+
+7.4.5 Included Certificates
+---------------------------
+
+ -- Function: void gpgme_set_include_certs (gpgme_ctx_t CTX,
+ int NR_OF_CERTS)
+ The function `gpgme_set_include_certs' specifies how many
+ certificates should be included in an S/MIME signed message. By
+ default, only the sender's certificate is included. The possible
+ values of NR_OF_CERTS are:
+
+ `GPGME_INCLUDE_CERTS_DEFAULT'
+ Fall back to the default of the crypto backend. This is the
+ default for GPGME.
+
+ `-2'
+ Include all certificates except the root certificate.
+
+ `-1'
+ Include all certificates.
+
+ `0'
+ Include no certificates.
+
+ `1'
+ Include the sender's certificate only.
+
+ `n'
+ Include the first n certificates of the certificates path,
+ starting from the sender's certificate. The number `n' must
+ be positive.
+
+ Values of NR_OF_CERTS smaller than -2 are undefined.
+
+ This option is only relevant to the CMS crypto engine, and ignored
+ by all other engines.
+
+ -- Function: int gpgme_get_include_certs (gpgme_ctx_t CTX)
+ The function `gpgme_get_include_certs' returns the number of
+ certificates to include into an S/MIME signed message.
+
+
+File: gpgme.info, Node: Key Listing Mode, Next: Passphrase Callback, Prev: Included Certificates, Up: Context Attributes
+
+7.4.6 Key Listing Mode
+----------------------
+
+ -- Function: gpgme_error_t gpgme_set_keylist_mode (gpgme_ctx_t CTX,
+ gpgme_keylist_mode_t MODE)
+ The function `gpgme_set_keylist_mode' changes the default
+ behaviour of the key listing functions. The value in MODE is a
+ bitwise-or combination of one or multiple of the following bit
+ values:
+
+ `GPGME_KEYLIST_MODE_LOCAL'
+ The `GPGME_KEYLIST_MODE_LOCAL' symbol specifies that the local
+ keyring should be searched for keys in the keylisting
+ operation. This is the default.
+
+ `GPGME_KEYLIST_MODE_EXTERN'
+ The `GPGME_KEYLIST_MODE_EXTERN' symbol specifies that an
+ external source should be searched for keys in the keylisting
+ operation. The type of external source is dependant on the
+ crypto engine used and whether it is combined with
+ `GPGME_KEYLIST_MODE_LOCAL'. For example, it can be a remote
+ keyserver or LDAP certificate server.
+
+ `GPGME_KEYLIST_MODE_SIGS'
+ The `GPGME_KEYLIST_MODE_SIGS' symbol specifies that the key
+ signatures should be included in the listed keys.
+
+ `GPGME_KEYLIST_MODE_SIG_NOTATIONS'
+ The `GPGME_KEYLIST_MODE_SIG_NOTATIONS' symbol specifies that
+ the signature notations on key signatures should be included
+ in the listed keys. This only works if
+ `GPGME_KEYLIST_MODE_SIGS' is also enabled.
+
+ `GPGME_KEYLIST_MODE_EPHEMERAL'
+ The `GPGME_KEYLIST_MODE_EPHEMERAL' symbol specifies that keys
+ flagged as ephemeral are included in the listing.
+
+ `GPGME_KEYLIST_MODE_VALIDATE'
+ The `GPGME_KEYLIST_MODE_VALIDATE' symbol specifies that the
+ backend should do key or certificate validation and not just
+ get the validity information from an internal cache. This
+ might be an expensive operation and is in general not useful.
+ Currently only implemented for the S/MIME backend and ignored
+ for other backends.
+
+
+ At least one of `GPGME_KEYLIST_MODE_LOCAL' and
+ `GPGME_KEYLIST_MODE_EXTERN' must be specified. For future binary
+ compatibility, you should get the current mode with
+ `gpgme_get_keylist_mode' and modify it by setting or clearing the
+ appropriate bits, and then using that calculated value in the
+ `gpgme_set_keylisting_mode' operation. This will leave all other
+ bits in the mode value intact (in particular those that are not
+ used in the current version of the library).
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the mode
+ could be set correctly, and `GPG_ERR_INV_VALUE' if CTX is not a
+ valid pointer or MODE is not a valid mode.
+
+ -- Function: gpgme_keylist_mode_t gpgme_get_keylist_mode
+ (gpgme_ctx_t CTX)
+ The function `gpgme_get_keylist_mode' returns the current key
+ listing mode of the context CTX. This value can then be modified
+ and used in a subsequent `gpgme_set_keylist_mode' operation to
+ only affect the desired bits (and leave all others intact).
+
+ The function returns 0 if CTX is not a valid pointer, and the
+ current mode otherwise. Note that 0 is not a valid mode value.
+
+
+File: gpgme.info, Node: Passphrase Callback, Next: Progress Meter Callback, Prev: Key Listing Mode, Up: Context Attributes
+
+7.4.7 Passphrase Callback
+-------------------------
+
+ -- Data type: gpgme_error_t (*gpgme_passphrase_cb_t)(void *HOOK, const
+char *UID_HINT, const char *PASSPHRASE_INFO, int PREV_WAS_BAD, int FD)
+ The `gpgme_passphrase_cb_t' type is the type of functions usable as
+ passphrase callback function.
+
+ The argument UID_HINT might contain a string that gives an
+ indication for which user ID the passphrase is required. If this
+ is not available, or not applicable (in the case of symmetric
+ encryption, for example), UID_HINT will be `NULL'.
+
+ The argument PASSPHRASE_INFO, if not `NULL', will give further
+ information about the context in which the passphrase is required.
+ This information is engine and operation specific.
+
+ If this is the repeated attempt to get the passphrase, because
+ previous attempts failed, then PREV_WAS_BAD is 1, otherwise it
+ will be 0.
+
+ The user must write the passphrase, followed by a newline
+ character, to the file descriptor FD. If the user returns 0
+ indicating success, the user must at least write a newline
+ character before returning from the callback.
+
+ If an error occurs, return the corresponding `gpgme_error_t'
+ value. You can use the error code `GPG_ERR_CANCELED' to abort the
+ operation. Otherwise, return `0'.
+
+ -- Function: void gpgme_set_passphrase_cb (gpgme_ctx_t CTX,
+ gpgme_passphrase_cb_t PASSFUNC, void *HOOK_VALUE)
+ The function `gpgme_set_passphrase_cb' sets the function that is
+ used when a passphrase needs to be provided by the user to
+ PASSFUNC. The function PASSFUNC needs to implemented by the user,
+ and whenever it is called, it is called with its first argument
+ being HOOK_VALUE. By default, no passphrase callback function is
+ set.
+
+ Not all crypto engines require this callback to retrieve the
+ passphrase. It is better if the engine retrieves the passphrase
+ from a trusted agent (a daemon process), rather than having each
+ user to implement their own passphrase query. Some engines do not
+ even support an external passphrase callback at all, in this case
+ the error code `GPG_ERR_NOT_SUPPORTED' is returned.
+
+ The user can disable the use of a passphrase callback function by
+ calling `gpgme_set_passphrase_cb' with PASSFUNC being `NULL'.
+
+ -- Function: void gpgme_get_passphrase_cb (gpgme_ctx_t CTX,
+ gpgme_passphrase_cb_t *PASSFUNC, void **HOOK_VALUE)
+ The function `gpgme_get_passphrase_cb' returns the function that
+ is used when a passphrase needs to be provided by the user in
+ *PASSFUNC, and the first argument for this function in
+ *HOOK_VALUE. If no passphrase callback is set, or CTX is not a
+ valid pointer, `NULL' is returned in both variables.
+
+ PASSFUNC or HOOK_VALUE can be `NULL'. In this case, the
+ corresponding value will not be returned.
+
+
+File: gpgme.info, Node: Progress Meter Callback, Next: Locale, Prev: Passphrase Callback, Up: Context Attributes
+
+7.4.8 Progress Meter Callback
+-----------------------------
+
+ -- Data type: void (*gpgme_progress_cb_t)(void *HOOK, const char
+*WHAT, int TYPE, int CURRENT, int TOTAL)
+ The `gpgme_progress_cb_t' type is the type of functions usable as
+ progress callback function.
+
+ The arguments are specific to the crypto engine. More information
+ about the progress information returned from the GnuPG engine can
+ be found in the GnuPG source code in the file `doc/DETAILS' in the
+ section PROGRESS.
+
+ -- Function: void gpgme_set_progress_cb (gpgme_ctx_t CTX,
+ gpgme_progress_cb_t PROGFUNC, void *HOOK_VALUE)
+ The function `gpgme_set_progress_cb' sets the function that is
+ used when progress information about a cryptographic operation is
+ available. The function PROGFUNC needs to implemented by the
+ user, and whenever it is called, it is called with its first
+ argument being HOOK_VALUE. By default, no progress callback
+ function is set.
+
+ Setting a callback function allows an interactive program to
+ display progress information about a long operation to the user.
+
+ The user can disable the use of a progress callback function by
+ calling `gpgme_set_progress_cb' with PROGFUNC being `NULL'.
+
+ -- Function: void gpgme_get_progress_cb (gpgme_ctx_t CTX,
+ gpgme_progress_cb_t *PROGFUNC, void **HOOK_VALUE)
+ The function `gpgme_get_progress_cb' returns the function that is
+ used to inform the user about the progress made in *PROGFUNC, and
+ the first argument for this function in *HOOK_VALUE. If no
+ progress callback is set, or CTX is not a valid pointer, `NULL' is
+ returned in both variables.
+
+ PROGFUNC or HOOK_VALUE can be `NULL'. In this case, the
+ corresponding value will not be returned.
+
+
+File: gpgme.info, Node: Locale, Prev: Progress Meter Callback, Up: Context Attributes
+
+7.4.9 Locale
+------------
+
+A locale setting can be associated with a context. This locale is
+passed to the crypto engine, and used for applications like the PIN
+entry, which is displayed to the user when entering a passphrase is
+required.
+
+ The default locale is used to initialize the locale setting of all
+contexts created afterwards.
+
+ -- Function: gpgme_error_t gpgme_set_locale (gpgme_ctx_t CTX,
+ int CATEGORY, const char *VALUE)
+ The function `gpgme_set_locale' sets the locale of the context
+ CTX, or the default locale if CTX is a null pointer.
+
+ The locale settings that should be changed are specified by
+ CATEGORY. Supported categories are `LC_CTYPE', `LC_MESSAGES', and
+ `LC_ALL', which is a wildcard you can use if you want to change
+ all the categories at once.
+
+ The value to be used for the locale setting is VALUE, which will
+ be copied to GPGME's internal data structures. VALUE can be a
+ null pointer, which disables setting the locale, and will make PIN
+ entry and other applications use their default setting, which is
+ usually not what you want.
+
+ Note that the settings are only used if the application runs on a
+ text terminal, and that the settings should fit the configuration
+ of the output terminal. Normally, it is sufficient to initialize
+ the default value at startup.
+
+ The function returns an error if not enough memory is available.
+
+
+File: gpgme.info, Node: Key Management, Next: Trust Item Management, Prev: Context Attributes, Up: Contexts
+
+7.5 Key Management
+==================
+
+Some of the cryptographic operations require that recipients or signers
+are specified. This is always done by specifying the respective keys
+that should be used for the operation. The following section describes
+how such keys can be selected and manipulated.
+
+ -- Data type: gpgme_sub_key_t
+ The `gpgme_sub_key_t' type is a pointer to a subkey structure.
+ Sub keys are one component of a `gpgme_key_t' object. In fact,
+ subkeys are those parts that contains the real information about
+ the individual cryptographic keys that belong to the same key
+ object. One `gpgme_key_t' can contain several subkeys. The first
+ subkey in the linked list is also called the primary key.
+
+ The subkey structure has the following members:
+
+ `gpgme_sub_key_t next'
+ This is a pointer to the next subkey structure in the linked
+ list, or `NULL' if this is the last element.
+
+ `unsigned int revoked : 1'
+ This is true if the subkey is revoked.
+
+ `unsigned int expired : 1'
+ This is true if the subkey is expired.
+
+ `unsigned int disabled : 1'
+ This is true if the subkey is disabled.
+
+ `unsigned int invalid : 1'
+ This is true if the subkey is invalid.
+
+ `unsigned int can_encrypt : 1'
+ This is true if the subkey can be used for encryption.
+
+ `unsigned int can_sign : 1'
+ This is true if the subkey can be used to create data
+ signatures.
+
+ `unsigned int can_certify : 1'
+ This is true if the subkey can be used to create key
+ certificates.
+
+ `unsigned int can_authenticate : 1'
+ This is true if the subkey can be used for authentication.
+
+ `unsigned int is_qualified : 1'
+ This is true if the subkey can be used for qualified
+ signatures according to local government regulations.
+
+ `unsigned int secret : 1'
+ This is true if the subkey is a secret key. Note that it
+ will be false if the key is actually a stub key; i.e. a
+ secret key operation is currently not possible (offline-key).
+
+ `gpgme_pubkey_algo_t pubkey_algo'
+ This is the public key algorithm supported by this subkey.
+
+ `unsigned int length'
+ This is the length of the subkey (in bits).
+
+ `char *keyid'
+ This is the key ID of the subkey in hexadecimal digits.
+
+ `char *fpr'
+ This is the fingerprint of the subkey in hexadecimal digits,
+ if available.
+
+ `long int timestamp'
+ This is the creation timestamp of the subkey. This is -1 if
+ the timestamp is invalid, and 0 if it is not available.
+
+ `long int expires'
+ This is the expiration timestamp of the subkey, or 0 if the
+ subkey does not expire.
+
+ -- Data type: gpgme_key_sig_t
+ The `gpgme_key_sig_t' type is a pointer to a key signature
+ structure. Key signatures are one component of a `gpgme_key_t'
+ object, and validate user IDs on the key.
+
+ The signatures on a key are only available if the key was retrieved
+ via a listing operation with the `GPGME_KEYLIST_MODE_SIGS' mode
+ enabled, because it can be expensive to retrieve all signatures of
+ a key.
+
+ The signature notations on a key signature are only available if
+ the key was retrieved via a listing operation with the
+ `GPGME_KEYLIST_MODE_SIG_NOTATIONS' mode enabled, because it can be
+ expensive to retrieve all signature notations.
+
+ The key signature structure has the following members:
+
+ `gpgme_key_sig_t next'
+ This is a pointer to the next key signature structure in the
+ linked list, or `NULL' if this is the last element.
+
+ `unsigned int revoked : 1'
+ This is true if the key signature is a revocation signature.
+
+ `unsigned int expired : 1'
+ This is true if the key signature is expired.
+
+ `unsigned int invalid : 1'
+ This is true if the key signature is invalid.
+
+ `unsigned int exportable : 1'
+ This is true if the key signature is exportable.
+
+ `gpgme_pubkey_algo_t pubkey_algo'
+ This is the public key algorithm used to create the signature.
+
+ `char *keyid'
+ This is the key ID of the key (in hexadecimal digits) used to
+ create the signature.
+
+ `long int timestamp'
+ This is the creation timestamp of the key signature. This is
+ -1 if the timestamp is invalid, and 0 if it is not available.
+
+ `long int expires'
+ This is the expiration timestamp of the key signature, or 0
+ if the key signature does not expire.
+
+ `gpgme_error_t status'
+ This is the status of the signature and has the same meaning
+ as the member of the same name in a `gpgme_signature_t'
+ object.
+
+ `unsigned int sig_class'
+ This specifies the signature class of the key signature. The
+ meaning is specific to the crypto engine.
+
+ `char *uid'
+ This is the main user ID of the key used to create the
+ signature.
+
+ `char *name'
+ This is the name component of `uid', if available.
+
+ `char *comment'
+ This is the comment component of `uid', if available.
+
+ `char *email'
+ This is the email component of `uid', if available.
+
+ `gpgme_sig_notation_t notations'
+ This is a linked list with the notation data and policy URLs.
+
+ -- Data type: gpgme_user_id_t
+ A user ID is a component of a `gpgme_key_t' object. One key can
+ have many user IDs. The first one in the list is the main (or
+ primary) user ID.
+
+ The user ID structure has the following members.
+
+ `gpgme_user_id_t next'
+ This is a pointer to the next user ID structure in the linked
+ list, or `NULL' if this is the last element.
+
+ `unsigned int revoked : 1'
+ This is true if the user ID is revoked.
+
+ `unsigned int invalid : 1'
+ This is true if the user ID is invalid.
+
+ `gpgme_validity_t validity'
+ This specifies the validity of the user ID.
+
+ `char *uid'
+ This is the user ID string.
+
+ `char *name'
+ This is the name component of `uid', if available.
+
+ `char *comment'
+ This is the comment component of `uid', if available.
+
+ `char *email'
+ This is the email component of `uid', if available.
+
+ `gpgme_key_sig_t signatures'
+ This is a linked list with the signatures on this user ID.
+
+ -- Data type: gpgme_key_t
+ The `gpgme_key_t' type is a pointer to a key object. It has the
+ following members:
+
+ `gpgme_keylist_mode_t keylist_mode'
+ The keylist mode that was active when the key was retrieved.
+
+ `unsigned int revoked : 1'
+ This is true if the key is revoked.
+
+ `unsigned int expired : 1'
+ This is true if the key is expired.
+
+ `unsigned int disabled : 1'
+ This is true if the key is disabled.
+
+ `unsigned int invalid : 1'
+ This is true if the key is invalid. This might have several
+ reasons, for a example for the S/MIME backend, it will be set
+ in during key listsing if the key could not be validated due
+ to a missing certificates or unmatched policies.
+
+ `unsigned int can_encrypt : 1'
+ This is true if the key (ie one of its subkeys) can be used
+ for encryption.
+
+ `unsigned int can_sign : 1'
+ This is true if the key (ie one of its subkeys) can be used
+ to create data signatures.
+
+ `unsigned int can_certify : 1'
+ This is true if the key (ie one of its subkeys) can be used
+ to create key certificates.
+
+ `unsigned int can_authenticate : 1'
+ This is true if the key (ie one of its subkeys) can be used
+ for authentication.
+
+ `unsigned int is_qualified : 1'
+ This is true if the key can be used for qualified signatures
+ according to local government regulations.
+
+ `unsigned int secret : 1'
+ This is true if the key is a secret key. Note, that this
+ will always be true even if the corresponding subkey flag may
+ be false (offline/stub keys).
+
+ `gpgme_protocol_t protocol'
+ This is the protocol supported by this key.
+
+ `char *issuer_serial'
+ If `protocol' is `GPGME_PROTOCOL_CMS', then this is the
+ issuer serial.
+
+ `char *issuer_name'
+ If `protocol' is `GPGME_PROTOCOL_CMS', then this is the
+ issuer name.
+
+ `char *chain_id'
+ If `protocol' is `GPGME_PROTOCOL_CMS', then this is the chain
+ ID, which can be used to built the certificate chain.
+
+ `gpgme_validity_t owner_trust'
+ If `protocol' is `GPGME_PROTOCOL_OpenPGP', then this is the
+ owner trust.
+
+ `gpgme_sub_key_t subkeys'
+ This is a linked list with the subkeys of the key. The first
+ subkey in the list is the primary key and usually available.
+
+ `gpgme_user_id_t uids'
+ This is a linked list with the user IDs of the key. The
+ first user ID in the list is the main (or primary) user ID.
+
+* Menu:
+
+* Listing Keys:: Browsing the list of available keys.
+* Information About Keys:: Requesting detailed information about keys.
+* Key Signatures:: Listing the signatures on a key.
+* Manipulating Keys:: Operations on keys.
+* Generating Keys:: Creating new key pairs.
+* Exporting Keys:: Retrieving key data from the key ring.
+* Importing Keys:: Adding keys to the key ring.
+* Deleting Keys:: Removing keys from the key ring.
+* Changing Passphrases:: Change the passphrase of a key.
+* Advanced Key Editing:: Advanced key edit operation.
+
+
+File: gpgme.info, Node: Listing Keys, Next: Information About Keys, Up: Key Management
+
+7.5.1 Listing Keys
+------------------
+
+ -- Function: gpgme_error_t gpgme_op_keylist_start (gpgme_ctx_t CTX,
+ const char *PATTERN, int SECRET_ONLY)
+ The function `gpgme_op_keylist_start' initiates a key listing
+ operation inside the context CTX. It sets everything up so that
+ subsequent invocations of `gpgme_op_keylist_next' return the keys
+ in the list.
+
+ If PATTERN is `NULL', all available keys are returned. Otherwise,
+ PATTERN contains an engine specific expression that is used to
+ limit the list to all keys matching the pattern. Note that the
+ total length of the pattern is restricted to an engine-specific
+ maximum (a couple of hundred characters are usually accepted). The
+ pattern should be used to restrict the search to a certain common
+ name or user, not to list many specific keys at once by listing
+ their fingerprints or key IDs.
+
+ If SECRET_ONLY is not `0', the list is restricted to secret keys
+ only.
+
+ The context will be busy until either all keys are received (and
+ `gpgme_op_keylist_next' returns `GPG_ERR_EOF'), or
+ `gpgme_op_keylist_end' is called to finish the operation.
+
+ The function returns the error code `GPG_ERR_INV_VALUE' if CTX is
+ not a valid pointer, and passes through any errors that are
+ reported by the crypto engine support routines.
+
+ -- Function: gpgme_error_t gpgme_op_keylist_ext_start
+ (gpgme_ctx_t CTX, const char *PATTERN[], int SECRET_ONLY,
+ int RESERVED)
+ The function `gpgme_op_keylist_ext_start' initiates an extended
+ key listing operation inside the context CTX. It sets everything
+ up so that subsequent invocations of `gpgme_op_keylist_next'
+ return the keys in the list.
+
+ If PATTERN or *PATTERN is `NULL', all available keys are returned.
+ Otherwise, PATTERN is a `NULL' terminated array of strings that
+ are used to limit the list to all keys matching at least one of
+ the patterns verbatim. Note that the total length of all patterns
+ is restricted to an engine-specific maximum (the exact limit also
+ depends on the number of patterns and amount of quoting required,
+ but a couple of hundred characters are usually accepted).
+ Patterns should be used to restrict the search to a certain common
+ name or user, not to list many specific keys at once by listing
+ their fingerprints or key IDs.
+
+ If SECRET_ONLY is not `0', the list is restricted to secret keys
+ only.
+
+ The value of RESERVED must be `0'.
+
+ The context will be busy until either all keys are received (and
+ `gpgme_op_keylist_next' returns `GPG_ERR_EOF'), or
+ `gpgme_op_keylist_end' is called to finish the operation.
+
+ The function returns the error code `GPG_ERR_INV_VALUE' if CTX is
+ not a valid pointer, and passes through any errors that are
+ reported by the crypto engine support routines.
+
+ -- Function: gpgme_error_t gpgme_op_keylist_next (gpgme_ctx_t CTX,
+ gpgme_key_t *R_KEY)
+ The function `gpgme_op_keylist_next' returns the next key in the
+ list created by a previous `gpgme_op_keylist_start' operation in
+ the context CTX. The key will have one reference for the user.
+ *Note Manipulating Keys::.
+
+ This is the only way to get at `gpgme_key_t' objects in GPGME.
+
+ If the last key in the list has already been returned,
+ `gpgme_op_keylist_next' returns `GPG_ERR_EOF'.
+
+ The function returns the error code `GPG_ERR_INV_VALUE' if CTX or
+ R_KEY is not a valid pointer, and `GPG_ERR_ENOMEM' if there is not
+ enough memory for the operation.
+
+ -- Function: gpgme_error_t gpgme_op_keylist_end (gpgme_ctx_t CTX)
+ The function `gpgme_op_keylist_end' ends a pending key list
+ operation in the context CTX.
+
+ After the operation completed successfully, the result of the key
+ listing operation can be retrieved with `gpgme_op_keylist_result'.
+
+ The function returns the error code `GPG_ERR_INV_VALUE' if CTX is
+ not a valid pointer, and `GPG_ERR_ENOMEM' if at some time during
+ the operation there was not enough memory available.
+
+ The following example illustrates how all keys containing a certain
+string (`g10code') can be listed with their key ID and the name and
+e-mail address of the main user ID:
+
+ gpgme_ctx_t ctx;
+ gpgme_key_t key;
+ gpgme_error_t err = gpgme_new (&ctx);
+
+ if (!err)
+ {
+ err = gpgme_op_keylist_start (ctx, "g10code", 0);
+ while (!err)
+ {
+ err = gpgme_op_keylist_next (ctx, &key);
+ if (err)
+ break;
+ printf ("%s:", key->subkeys->keyid);
+ if (key->uids && key->uids->name)
+ printf (" %s", key->uids->name);
+ if (key->uids && key->uids->email)
+ printf (" <%s>", key->uids->email);
+ putchar ('\n');
+ gpgme_key_release (key);
+ }
+ gpgme_release (ctx);
+ }
+ if (gpg_err_code (err) != GPG_ERR_EOF)
+ {
+ fprintf (stderr, "can not list keys: %s\n", gpgme_strerror (err));
+ exit (1);
+ }
+
+ -- Data type: gpgme_keylist_result_t
+ This is a pointer to a structure used to store the result of a
+ `gpgme_op_keylist_*' operation. After successfully ending a key
+ listing operation, you can retrieve the pointer to the result with
+ `gpgme_op_keylist_result'. The structure contains the following
+ member:
+
+ `unsigned int truncated : 1'
+ This is true if the crypto backend had to truncate the
+ result, and less than the desired keys could be listed.
+
+ -- Function: gpgme_keylist_result_t gpgme_op_keylist_result
+ (gpgme_ctx_t CTX)
+ The function `gpgme_op_keylist_result' returns a
+ `gpgme_keylist_result_t' pointer to a structure holding the result
+ of a `gpgme_op_keylist_*' operation. The pointer is only valid if
+ the last operation on the context was a key listing operation, and
+ if this operation finished successfully. The returned pointer is
+ only valid until the next operation is started on the context.
+
+ In a simple program, for which a blocking operation is acceptable,
+the following function can be used to retrieve a single key.
+
+ -- Function: gpgme_error_t gpgme_get_key (gpgme_ctx_t CTX,
+ const char *FPR, gpgme_key_t *R_KEY, int SECRET)
+ The function `gpgme_get_key' gets the key with the fingerprint (or
+ key ID) FPR from the crypto backend and return it in R_KEY. If
+ SECRET is true, get the secret key. The currently active keylist
+ mode is used to retrieve the key. The key will have one reference
+ for the user.
+
+ If the key is not found in the keyring, `gpgme_get_key' returns
+ the error code `GPG_ERR_EOF' and *R_KEY will be set to `NULL'.
+
+ The function returns the error code `GPG_ERR_INV_VALUE' if CTX or
+ R_KEY is not a valid pointer or FPR is not a fingerprint or key
+ ID, `GPG_ERR_AMBIGUOUS_NAME' if the key ID was not a unique
+ specifier for a key, and `GPG_ERR_ENOMEM' if at some time during
+ the operation there was not enough memory available.
+
+
+File: gpgme.info, Node: Information About Keys, Next: Key Signatures, Prev: Listing Keys, Up: Key Management
+
+7.5.2 Information About Keys
+----------------------------
+
+Please see the beginning of this section for more information about
+`gpgme_key_t' objects.
+
+ -- Data type: gpgme_validity_t
+ The `gpgme_validity_t' type is used to specify the validity of a
+ user ID in a key. The following validities are defined:
+
+ `GPGME_VALIDITY_UNKNOWN'
+ The user ID is of unknown validity. The string
+ representation of this validity is "?".
+
+ `GPGME_VALIDITY_UNDEFINED'
+ The validity of the user ID is undefined. The string
+ representation of this validity is "q".
+
+ `GPGME_VALIDITY_NEVER'
+ The user ID is never valid. The string representation of this
+ validity is "n".
+
+ `GPGME_VALIDITY_MARGINAL'
+ The user ID is marginally valid. The string representation
+ of this validity is "m".
+
+ `GPGME_VALIDITY_FULL'
+ The user ID is fully valid. The string representation of this
+ validity is "f".
+
+ `GPGME_VALIDITY_ULTIMATE'
+ The user ID is ultimately valid. The string representation
+ of this validity is "u".
+
+ The following interfaces are deprecated and only provided for
+backward compatibility. Don't use them. They will be removed in a
+future version of GPGME.
+
+ -- Data type: gpgme_attr_t
+ The `gpgme_attr_t' type is used to specify a key or trust item
+ attribute. The following attributes are defined:
+
+ `GPGME_ATTR_KEYID'
+ This is the key ID of a sub key. It is representable as a
+ string.
+
+ For trust items, the trust item refers to the key with this
+ ID.
+
+ `GPGME_ATTR_FPR'
+ This is the fingerprint of a sub key. It is representable as
+ a string.
+
+ `GPGME_ATTR_ALGO'
+ This is the crypto algorithm for which the sub key can be
+ used. It is representable as a string and as a number. The
+ numbers correspond to the `enum gcry_pk_algos' values in the
+ gcrypt library.
+
+ `GPGME_ATTR_LEN'
+ This is the key length of a sub key. It is representable as a
+ number.
+
+ `GPGME_ATTR_CREATED'
+ This is the timestamp at creation time of a sub key. It is
+ representable as a number.
+
+ `GPGME_ATTR_EXPIRE'
+ This is the expiration time of a sub key. It is
+ representable as a number.
+
+ `GPGME_ATTR_OTRUST'
+ XXX FIXME (also for trust items)
+
+ `GPGME_ATTR_USERID'
+ This is a user ID. There can be more than one user IDs in a
+ GPGME_KEY_T object. The first one (with index 0) is the
+ primary user ID. The user ID is representable as a number.
+
+ For trust items, this is the user ID associated with this
+ trust item.
+
+ `GPGME_ATTR_NAME'
+ This is the name belonging to a user ID. It is representable
+ as a string.
+
+ `GPGME_ATTR_EMAIL'
+ This is the email address belonging to a user ID. It is
+ representable as a string.
+
+ `GPGME_ATTR_COMMENT'
+ This is the comment belonging to a user ID. It is
+ representable as a string.
+
+ `GPGME_ATTR_VALIDITY'
+ This is the validity belonging to a user ID. It is
+ representable as a string and as a number. See below for a
+ list of available validities.
+
+ For trust items, this is the validity that is associated with
+ this trust item.
+
+ `GPGME_ATTR_UID_REVOKED'
+ This specifies if a user ID is revoked. It is representable
+ as a number, and is `1' if the user ID is revoked, and `0'
+ otherwise.
+
+ `GPGME_ATTR_UID_INVALID'
+ This specifies if a user ID is invalid. It is representable
+ as a number, and is `1' if the user ID is invalid, and `0'
+ otherwise.
+
+ `GPGME_ATTR_LEVEL'
+ This is the trust level of a trust item.
+
+ `GPGME_ATTR_TYPE'
+ This returns information about the type of key. For the
+ string function this will eother be "PGP" or "X.509". The
+ integer function returns 0 for PGP and 1 for X.509. It is
+ also used for the type of a trust item.
+
+ `GPGME_ATTR_IS_SECRET'
+ This specifies if the key is a secret key. It is
+ representable as a number, and is `1' if the key is revoked,
+ and `0' otherwise.
+
+ `GPGME_ATTR_KEY_REVOKED'
+ This specifies if a sub key is revoked. It is representable
+ as a number, and is `1' if the key is revoked, and `0'
+ otherwise.
+
+ `GPGME_ATTR_KEY_INVALID'
+ This specifies if a sub key is invalid. It is representable
+ as a number, and is `1' if the key is invalid, and `0'
+ otherwise.
+
+ `GPGME_ATTR_KEY_EXPIRED'
+ This specifies if a sub key is expired. It is representable
+ as a number, and is `1' if the key is expired, and `0'
+ otherwise.
+
+ `GPGME_ATTR_KEY_DISABLED'
+ This specifies if a sub key is disabled. It is representable
+ as a number, and is `1' if the key is disabled, and `0'
+ otherwise.
+
+ `GPGME_ATTR_KEY_CAPS'
+ This is a description of the capabilities of a sub key. It is
+ representable as a string. The string contains the letter
+ "e" if the key can be used for encryption, "s" if the key can
+ be used for signatures, and "c" if the key can be used for
+ certifications.
+
+ `GPGME_ATTR_CAN_ENCRYPT'
+ This specifies if a sub key can be used for encryption. It is
+ representable as a number, and is `1' if the sub key can be
+ used for encryption, and `0' otherwise.
+
+ `GPGME_ATTR_CAN_SIGN'
+ This specifies if a sub key can be used to create data
+ signatures. It is representable as a number, and is `1' if
+ the sub key can be used for signatures, and `0' otherwise.
+
+ `GPGME_ATTR_CAN_CERTIFY'
+ This specifies if a sub key can be used to create key
+ certificates. It is representable as a number, and is `1' if
+ the sub key can be used for certifications, and `0' otherwise.
+
+ `GPGME_ATTR_SERIAL'
+ The X.509 issuer serial attribute of the key. It is
+ representable as a string.
+
+ `GPGME_ATTR_ISSUE'
+ The X.509 issuer name attribute of the key. It is
+ representable as a string.
+
+ `GPGME_ATTR_CHAINID'
+ The X.509 chain ID can be used to build the certification
+ chain. It is representable as a string.
+
+ -- Function: const char * gpgme_key_get_string_attr (gpgme_key_t KEY,
+ gpgme_attr_t WHAT, const void *RESERVED, int IDX)
+ The function `gpgme_key_get_string_attr' returns the value of the
+ string-representable attribute WHAT of key KEY. If the attribute
+ is an attribute of a sub key or an user ID, IDX specifies the sub
+ key or user ID of which the attribute value is returned. The
+ argument RESERVED is reserved for later use and should be `NULL'.
+
+ The string returned is only valid as long as the key is valid.
+
+ The function returns `0' if an attribute can't be returned as a
+ string, KEY is not a valid pointer, IDX out of range, or RESERVED
+ not `NULL'.
+
+ -- Function: unsigned long gpgme_key_get_ulong_attr (gpgme_key_t KEY,
+ gpgme_attr_t WHAT, const void *RESERVED, int IDX)
+ The function `gpgme_key_get_ulong_attr' returns the value of the
+ number-representable attribute WHAT of key KEY. If the attribute
+ is an attribute of a sub key or an user ID, IDX specifies the sub
+ key or user ID of which the attribute value is returned. The
+ argument RESERVED is reserved for later use and should be `NULL'.
+
+ The function returns `0' if the attribute can't be returned as a
+ number, KEY is not a valid pointer, IDX out of range, or RESERVED
+ not `NULL'.
+
+
+File: gpgme.info, Node: Key Signatures, Next: Manipulating Keys, Prev: Information About Keys, Up: Key Management
+
+7.5.3 Key Signatures
+--------------------
+
+The following interfaces are deprecated and only provided for backward
+compatibility. Don't use them. They will be removed in a future
+version of GPGME.
+
+ The signatures on a key are only available if the key was retrieved
+via a listing operation with the `GPGME_KEYLIST_MODE_SIGS' mode
+enabled, because it is expensive to retrieve all signatures of a key.
+
+ So, before using the below interfaces to retrieve the signatures on a
+key, you have to make sure that the key was listed with signatures
+enabled. One convenient, but blocking, way to do this is to use the
+function `gpgme_get_key'.
+
+ -- Data type: gpgme_attr_t
+ The `gpgme_attr_t' type is used to specify a key signature
+ attribute. The following attributes are defined:
+
+ `GPGME_ATTR_KEYID'
+ This is the key ID of the key which was used for the
+ signature. It is representable as a string.
+
+ `GPGME_ATTR_ALGO'
+ This is the crypto algorithm used to create the signature.
+ It is representable as a string and as a number. The numbers
+ correspond to the `enum gcry_pk_algos' values in the gcrypt
+ library.
+
+ `GPGME_ATTR_CREATED'
+ This is the timestamp at creation time of the signature. It
+ is representable as a number.
+
+ `GPGME_ATTR_EXPIRE'
+ This is the expiration time of the signature. It is
+ representable as a number.
+
+ `GPGME_ATTR_USERID'
+ This is the user ID associated with the signing key. The
+ user ID is representable as a number.
+
+ `GPGME_ATTR_NAME'
+ This is the name belonging to a user ID. It is representable
+ as a string.
+
+ `GPGME_ATTR_EMAIL'
+ This is the email address belonging to a user ID. It is
+ representable as a string.
+
+ `GPGME_ATTR_COMMENT'
+ This is the comment belonging to a user ID. It is
+ representable as a string.
+
+ `GPGME_ATTR_KEY_REVOKED'
+ This specifies if a key signature is a revocation signature.
+ It is representable as a number, and is `1' if the key is
+ revoked, and `0' otherwise.
+
+ `GPGME_ATTR_SIG_CLASS'
+ This specifies the signature class of a key signature. It is
+ representable as a number. The meaning is specific to the
+ crypto engine.
+
+ `GPGME_ATTR_SIG_CLASS'
+ This specifies the signature class of a key signature. It is
+ representable as a number. The meaning is specific to the
+ crypto engine.
+
+ `GPGME_ATTR_SIG_STATUS'
+ This is the same value as returned by `gpgme_get_sig_status'.
+
+ -- Function: const char * gpgme_key_sig_get_string_attr
+ (gpgme_key_t KEY, int UID_IDX, gpgme_attr_t WHAT,
+ const void *RESERVED, int IDX)
+ The function `gpgme_key_sig_get_string_attr' returns the value of
+ the string-representable attribute WHAT of the signature IDX on
+ the user ID UID_IDX in the key KEY. The argument RESERVED is
+ reserved for later use and should be `NULL'.
+
+ The string returned is only valid as long as the key is valid.
+
+ The function returns `0' if an attribute can't be returned as a
+ string, KEY is not a valid pointer, UID_IDX or IDX out of range,
+ or RESERVED not `NULL'.
+
+ -- Function: unsigned long gpgme_key_sig_get_ulong_attr
+ (gpgme_key_t KEY, int UID_IDX, gpgme_attr_t WHAT,
+ const void *RESERVED, int IDX)
+ The function `gpgme_key_sig_get_ulong_attr' returns the value of
+ the number-representable attribute WHAT of the signature IDX on
+ the user ID UID_IDX in the key KEY. The argument RESERVED is
+ reserved for later use and should be `NULL'.
+
+ The function returns `0' if an attribute can't be returned as a
+ string, KEY is not a valid pointer, UID_IDX or IDX out of range,
+ or RESERVED not `NULL'.
+
+
+File: gpgme.info, Node: Manipulating Keys, Next: Generating Keys, Prev: Key Signatures, Up: Key Management
+
+7.5.4 Manipulating Keys
+-----------------------
+
+ -- Function: void gpgme_key_ref (gpgme_key_t KEY)
+ The function `gpgme_key_ref' acquires an additional reference for
+ the key KEY.
+
+ -- Function: void gpgme_key_unref (gpgme_key_t KEY)
+ The function `gpgme_key_unref' releases a reference for the key
+ KEY. If this was the last reference, the key will be destroyed
+ and all resources associated to it will be released.
+
+ The following interface is deprecated and only provided for backward
+compatibility. Don't use it. It will be removed in a future version
+of GPGME.
+
+ -- Function: void gpgme_key_release (gpgme_key_t KEY)
+ The function `gpgme_key_release' is equivalent to
+ `gpgme_key_unref'.
+
+
+File: gpgme.info, Node: Generating Keys, Next: Exporting Keys, Prev: Manipulating Keys, Up: Key Management
+
+7.5.5 Generating Keys
+---------------------
+
+ -- Function: gpgme_error_t gpgme_op_genkey (gpgme_ctx_t CTX,
+ const char *PARMS, gpgme_data_t PUBLIC, gpgme_data_t SECRET)
+ The function `gpgme_op_genkey' generates a new key pair in the
+ context CTX. The meaning of PUBLIC and SECRET depends on the
+ crypto backend.
+
+ GnuPG does not support PUBLIC and SECRET, they should be `NULL'.
+ GnuPG will generate a key pair and add it to the standard key
+ ring. The fingerprint of the generated key is available with
+ `gpgme_op_genkey_result'.
+
+ GpgSM requires PUBLIC to be a writable data object. GpgSM will
+ generate a secret key (which will be stored by `gpg-agent', and
+ return a certificate request in PUBLIC, which then needs to be
+ signed by the certification authority and imported before it can be
+ used. GpgSM does not make the fingerprint available.
+
+ The argument PARMS specifies parameters for the key in an XML
+ string. The details about the format of PARMS are specific to the
+ crypto engine used by CTX. Here is an example for GnuPG as the
+ crypto engine (all parameters of OpenPGP key generation are
+ documented in the GPG manual):
+
+ <GnupgKeyParms format="internal">
+ Key-Type: default
+ Subkey-Type: default
+ Name-Real: Joe Tester
+ Name-Comment: with stupid passphrase
+ Name-Email: joe@foo.bar
+ Expire-Date: 0
+ Passphrase: abc
+ </GnupgKeyParms>
+
+ Here is an example for GpgSM as the crypto engine (all parameters
+ of OpenPGP key generation are documented in the GPGSM manual):
+
+ <GnupgKeyParms format="internal">
+ Key-Type: RSA
+ Key-Length: 1024
+ Name-DN: C=de,O=g10 code,OU=Testlab,CN=Joe 2 Tester
+ Name-Email: joe@foo.bar
+ </GnupgKeyParms>
+
+ Strings should be given in UTF-8 encoding. The only format
+ supported for now is "internal". The content of the
+ `GnupgKeyParms' container is passed verbatim to the crypto
+ backend. Control statements are not allowed.
+
+ After the operation completed successfully, the result can be
+ retrieved with `gpgme_op_genkey_result'.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation could be started successfully, `GPG_ERR_INV_VALUE' if
+ PARMS is not a valid XML string, `GPG_ERR_NOT_SUPPORTED' if PUBLIC
+ or SECRET is not valid, and `GPG_ERR_GENERAL' if no key was
+ created by the backend.
+
+ -- Function: gpgme_error_t gpgme_op_genkey_start (gpgme_ctx_t CTX,
+ const char *PARMS, gpgme_data_t PUBLIC, gpgme_data_t SECRET)
+ The function `gpgme_op_genkey_start' initiates a `gpgme_op_genkey'
+ operation. It can be completed by calling `gpgme_wait' on the
+ context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation could be started successfully, `GPG_ERR_INV_VALUE' if
+ PARMS is not a valid XML string, and `GPG_ERR_NOT_SUPPORTED' if
+ PUBLIC or SECRET is not `NULL'.
+
+ -- Data type: gpgme_genkey_result_t
+ This is a pointer to a structure used to store the result of a
+ `gpgme_op_genkey' operation. After successfully generating a key,
+ you can retrieve the pointer to the result with
+ `gpgme_op_genkey_result'. The structure contains the following
+ members:
+
+ `unsigned int primary : 1'
+ This is a flag that is set to 1 if a primary key was created
+ and to 0 if not.
+
+ `unsigned int sub : 1'
+ This is a flag that is set to 1 if a subkey was created and
+ to 0 if not.
+
+ `char *fpr'
+ This is the fingerprint of the key that was created. If both
+ a primary and a sub key were generated, the fingerprint of
+ the primary key will be returned. If the crypto engine does
+ not provide the fingerprint, `fpr' will be a null pointer.
+
+ -- Function: gpgme_genkey_result_t gpgme_op_genkey_result
+ (gpgme_ctx_t CTX)
+ The function `gpgme_op_genkey_result' returns a
+ `gpgme_genkey_result_t' pointer to a structure holding the result
+ of a `gpgme_op_genkey' operation. The pointer is only valid if the
+ last operation on the context was a `gpgme_op_genkey' or
+ `gpgme_op_genkey_start' operation, and if this operation finished
+ successfully. The returned pointer is only valid until the next
+ operation is started on the context.
+
+
+File: gpgme.info, Node: Exporting Keys, Next: Importing Keys, Prev: Generating Keys, Up: Key Management
+
+7.5.6 Exporting Keys
+--------------------
+
+Exporting keys means the same as running `gpg' with the command
+`--export'. However, a mode flag can be used to change the way the
+export works. The available mode flags are described below, they may
+be or-ed together.
+
+`GPGME_EXPORT_MODE_EXTERN'
+ If this bit is set, the output is send directly to the default
+ keyserver. This is currently only allowed for OpenPGP keys. It is
+ good practise to not send more than a few dozens key to a
+ keyserver at one time. Using this flag requires that the KEYDATA
+ argument of the export function is set to `NULL'.
+
+`GPGME_EXPORT_MODE_MINIMAL'
+ If this bit is set, the smallest possible key is exported. For
+ OpenPGP keys it removes all signatures except for the latest
+ self-signatures. For X.509 keys it has no effect.
+
+
+ -- Function: gpgme_error_t gpgme_op_export (gpgme_ctx_t CTX,
+ const char *PATTERN, gpgme_export_mode_t MODE,
+ gpgme_data_t KEYDATA)
+ The function `gpgme_op_export' extracts public keys and returns
+ them in the data buffer KEYDATA. The output format of the key
+ data returned is determined by the ASCII armor attribute set for
+ the context CTX, or, if that is not set, by the encoding specified
+ for KEYDATA.
+
+ If PATTERN is `NULL', all available keys are returned. Otherwise,
+ PATTERN contains an engine specific expression that is used to
+ limit the list to all keys matching the pattern.
+
+ MODE is usually 0; other values are described above.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation completed successfully, `GPG_ERR_INV_VALUE' if KEYDATA
+ is not a valid empty data buffer, and passes through any errors
+ that are reported by the crypto engine support routines.
+
+ -- Function: gpgme_error_t gpgme_op_export_start (gpgme_ctx_t CTX,
+ const char *PATTERN, gpgme_export_mode_t MODE,
+ gpgme_data_t KEYDATA)
+ The function `gpgme_op_export_start' initiates a `gpgme_op_export'
+ operation. It can be completed by calling `gpgme_wait' on the
+ context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation could be started successfully, and `GPG_ERR_INV_VALUE'
+ if KEYDATA is not a valid empty data buffer.
+
+ -- Function: gpgme_error_t gpgme_op_export_ext (gpgme_ctx_t CTX,
+ const char *PATTERN[], gpgme_export_mode_t MODE,
+ gpgme_data_t KEYDATA)
+ The function `gpgme_op_export' extracts public keys and returns
+ them in the data buffer KEYDATA. The output format of the key
+ data returned is determined by the ASCII armor attribute set for
+ the context CTX, or, if that is not set, by the encoding specified
+ for KEYDATA.
+
+ If PATTERN or *PATTERN is `NULL', all available keys are returned.
+ Otherwise, PATTERN is a `NULL' terminated array of strings that
+ are used to limit the list to all keys matching at least one of
+ the patterns verbatim.
+
+ MODE is usually 0; other values are described above.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation completed successfully, `GPG_ERR_INV_VALUE' if KEYDATA
+ is not a valid empty data buffer, and passes through any errors
+ that are reported by the crypto engine support routines.
+
+ -- Function: gpgme_error_t gpgme_op_export_ext_start (gpgme_ctx_t CTX,
+ const char *PATTERN[], gpgme_export_mode_t MODE,
+ gpgme_data_t KEYDATA)
+ The function `gpgme_op_export_ext_start' initiates a
+ `gpgme_op_export_ext' operation. It can be completed by calling
+ `gpgme_wait' on the context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation could be started successfully, and `GPG_ERR_INV_VALUE'
+ if KEYDATA is not a valid empty data buffer.
+
+ -- Function: gpgme_error_t gpgme_op_export_keys (gpgme_ctx_t CTX,
+ gpgme_key_t keys[], gpgme_export_mode_t MODE,
+ gpgme_data_t KEYDATA)
+ The function `gpgme_op_export_keys' extracts public keys and
+ returns them in the data buffer KEYDATA. The output format of the
+ key data returned is determined by the ASCII armor attribute set
+ for the context CTX, or, if that is not set, by the encoding
+ specified for KEYDATA.
+
+ The keys to export are taken form the `NULL' terminated array
+ KEYS. Only keys of the the currently selected protocol of CTX
+ which do have a fingerprint set are considered for export. Other
+ keys specified by the KEYS are ignored. In particular OpenPGP
+ keys retrieved via an external key listing are not included.
+
+ MODE is usually 0; other values are described above.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation completed successfully, `GPG_ERR_INV_VALUE' if KEYDATA
+ is not a valid empty data buffer, `GPG_ERR_NO_DATA' if no useful
+ keys are in KEYS and passes through any errors that are reported
+ by the crypto engine support routines.
+
+ -- Function: gpgme_error_t gpgme_op_export_keys_start
+ (gpgme_ctx_t CTX, gpgme_key_t KEYS[],
+ gpgme_export_mode_t MODE, gpgme_data_t KEYDATA)
+ The function `gpgme_op_export_keys_start' initiates a
+ `gpgme_op_export_ext' operation. It can be completed by calling
+ `gpgme_wait' on the context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation could be started successfully, and `GPG_ERR_INV_VALUE'
+ if KEYDATA is not a valid empty data buffer, `GPG_ERR_NO_DATA' if
+ no useful keys are in KEYS and passes through any errors that are
+ reported by the crypto engine support routines.
+
+
+File: gpgme.info, Node: Importing Keys, Next: Deleting Keys, Prev: Exporting Keys, Up: Key Management
+
+7.5.7 Importing Keys
+--------------------
+
+Importing keys means the same as running `gpg' with the command
+`--import'.
+
+ -- Function: gpgme_error_t gpgme_op_import (gpgme_ctx_t CTX,
+ gpgme_data_t KEYDATA)
+ The function `gpgme_op_import' adds the keys in the data buffer
+ KEYDATA to the key ring of the crypto engine used by CTX. The
+ format of KEYDATA can be ASCII armored, for example, but the
+ details are specific to the crypto engine.
+
+ After the operation completed successfully, the result can be
+ retrieved with `gpgme_op_import_result'.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ import was completed successfully, `GPG_ERR_INV_VALUE' if KEYDATA
+ if CTX or KEYDATA is not a valid pointer, and `GPG_ERR_NO_DATA' if
+ KEYDATA is an empty data buffer.
+
+ -- Function: gpgme_error_t gpgme_op_import_start (gpgme_ctx_t CTX,
+ gpgme_data_t KEYDATA)
+ The function `gpgme_op_import_start' initiates a `gpgme_op_import'
+ operation. It can be completed by calling `gpgme_wait' on the
+ context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ import could be started successfully, `GPG_ERR_INV_VALUE' if
+ KEYDATA if CTX or KEYDATA is not a valid pointer, and
+ `GPG_ERR_NO_DATA' if KEYDATA is an empty data buffer.
+
+ -- Function: gpgme_error_t gpgme_op_import_keys (gpgme_ctx_t CTX,
+ gpgme_key_t *KEYS)
+ The function `gpgme_op_import_keys' adds the keys described by the
+ `NULL' terminated array KEYS to the key ring of the crypto engine
+ used by CTX. This function is the general interface to move a key
+ from one crypto engine to another as long as they are compatible.
+ In particular it is used to actually import and make keys
+ permanent which have been retrieved from an external source (i.e.
+ using `GPGME_KEYLIST_MODE_EXTERN'). (1)
+
+ Only keys of the the currently selected protocol of CTX are
+ considered for import. Other keys specified by the KEYS are
+ ignored. As of now all considered keys must have been retrieved
+ using the same method, that is the used key listing mode must be
+ identical.
+
+ After the operation completed successfully, the result can be
+ retrieved with `gpgme_op_import_result'.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ import was completed successfully, `GPG_ERR_INV_VALUE' if KEYDATA
+ if CTX or KEYDATA is not a valid pointer, `GPG_ERR_CONFLICT' if
+ the key listing mode does not match, and `GPG_ERR_NO_DATA' if no
+ keys are considered for export.
+
+ -- Function: gpgme_error_t gpgme_op_import_keys_start
+ (gpgme_ctx_t CTX, gpgme_key_t *KEYS)
+ The function `gpgme_op_import_keys_start' initiates a
+ `gpgme_op_import_keys' operation. It can be completed by calling
+ `gpgme_wait' on the context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ import was completed successfully, `GPG_ERR_INV_VALUE' if KEYDATA
+ if CTX or KEYDATA is not a valid pointer, `GPG_ERR_CONFLICT' if
+ the key listing mode does not match, and `GPG_ERR_NO_DATA' if no
+ keys are considered for export.
+
+ -- Data type: gpgme_import_status_t
+ This is a pointer to a structure used to store a part of the
+ result of a `gpgme_op_import' operation. For each considered key
+ one status is added that contains information about the result of
+ the import. The structure contains the following members:
+
+ `gpgme_import_status_t next'
+ This is a pointer to the next status structure in the linked
+ list, or `NULL' if this is the last element.
+
+ `char *fpr'
+ This is the fingerprint of the key that was considered.
+
+ `gpgme_error_t result'
+ If the import was not successful, this is the error value
+ that caused the import to fail. Otherwise the error code is
+ `GPG_ERR_NO_ERROR'.
+
+ `unsigned int status'
+ This is a bit-wise OR of the following flags that give more
+ information about what part of the key was imported. If the
+ key was already known, this might be 0.
+
+ `GPGME_IMPORT_NEW'
+ The key was new.
+
+ `GPGME_IMPORT_UID'
+ The key contained new user IDs.
+
+ `GPGME_IMPORT_SIG'
+ The key contained new signatures.
+
+ `GPGME_IMPORT_SUBKEY'
+ The key contained new sub keys.
+
+ `GPGME_IMPORT_SECRET'
+ The key contained a secret key.
+
+ -- Data type: gpgme_import_result_t
+ This is a pointer to a structure used to store the result of a
+ `gpgme_op_import' operation. After a successful import operation,
+ you can retrieve the pointer to the result with
+ `gpgme_op_import_result'. The structure contains the following
+ members:
+
+ `int considered'
+ The total number of considered keys.
+
+ `int no_user_id'
+ The number of keys without user ID.
+
+ `int imported'
+ The total number of imported keys.
+
+ `imported_rsa'
+ The number of imported RSA keys.
+
+ `unchanged'
+ The number of unchanged keys.
+
+ `new_user_ids'
+ The number of new user IDs.
+
+ `new_sub_keys'
+ The number of new sub keys.
+
+ `new_signatures'
+ The number of new signatures.
+
+ `new_revocations'
+ The number of new revocations.
+
+ `secret_read'
+ The total number of secret keys read.
+
+ `secret_imported'
+ The number of imported secret keys.
+
+ `secret_unchanged'
+ The number of unchanged secret keys.
+
+ `not_imported'
+ The number of keys not imported.
+
+ `gpgme_import_status_t imports'
+ A list of gpgme_import_status_t objects which contain more
+ information about the keys for which an import was attempted.
+
+ -- Function: gpgme_import_result_t gpgme_op_import_result
+ (gpgme_ctx_t CTX)
+ The function `gpgme_op_import_result' returns a
+ `gpgme_import_result_t' pointer to a structure holding the result
+ of a `gpgme_op_import' operation. The pointer is only valid if
+ the last operation on the context was a `gpgme_op_import' or
+ `gpgme_op_import_start' operation, and if this operation finished
+ successfully. The returned pointer is only valid until the next
+ operation is started on the context.
+
+ The following interface is deprecated and only provided for backward
+compatibility. Don't use it. It will be removed in a future version
+of GPGME.
+
+ -- Function: gpgme_error_t gpgme_op_import_ext (gpgme_ctx_t CTX,
+ gpgme_data_t KEYDATA, int *NR)
+ The function `gpgme_op_import_ext' is equivalent to:
+
+ gpgme_error_t err = gpgme_op_import (ctx, keydata);
+ if (!err)
+ {
+ gpgme_import_result_t result = gpgme_op_import_result (ctx);
+ *nr = result->considered;
+ }
+
+ ---------- Footnotes ----------
+
+ (1) Thus it is a replacement for the usual workaround of exporting
+and then importing a key to make an X.509 key permanent.
+
+
+File: gpgme.info, Node: Deleting Keys, Next: Changing Passphrases, Prev: Importing Keys, Up: Key Management
+
+7.5.8 Deleting Keys
+-------------------
+
+ -- Function: gpgme_error_t gpgme_op_delete (gpgme_ctx_t CTX,
+ const gpgme_key_t KEY, int ALLOW_SECRET)
+ The function `gpgme_op_delete' deletes the key KEY from the key
+ ring of the crypto engine used by CTX. If ALLOW_SECRET is `0',
+ only public keys are deleted, otherwise secret keys are deleted as
+ well, if that is supported.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the key
+ was deleted successfully, `GPG_ERR_INV_VALUE' if CTX or KEY is not
+ a valid pointer, `GPG_ERR_NO_PUBKEY' if KEY could not be found in
+ the keyring, `GPG_ERR_AMBIGUOUS_NAME' if the key was not specified
+ unambiguously, and `GPG_ERR_CONFLICT' if the secret key for KEY is
+ available, but ALLOW_SECRET is zero.
+
+ -- Function: gpgme_error_t gpgme_op_delete_start (gpgme_ctx_t CTX,
+ const gpgme_key_t KEY, int ALLOW_SECRET)
+ The function `gpgme_op_delete_start' initiates a `gpgme_op_delete'
+ operation. It can be completed by calling `gpgme_wait' on the
+ context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation was started successfully, and `GPG_ERR_INV_VALUE' if CTX
+ or KEY is not a valid pointer.
+
+
+File: gpgme.info, Node: Changing Passphrases, Next: Advanced Key Editing, Prev: Deleting Keys, Up: Key Management
+
+7.5.9 Changing Passphrases
+--------------------------
+
+ -- Function: gpgme_error_t gpgme_op_passwd (gpgme_ctx_t CTX,
+ const gpgme_key_t KEY, unsigned int FLAGS)
+ The function `gpgme_op_passwd' changes the passphrase of the
+ private key associated with KEY. The only allowed value for FLAGS
+ is `0'. The backend engine will usually popup a window to ask for
+ the old and the new passphrase. Thus this function is not useful
+ in a server application (where passphrases are not required
+ anyway).
+
+ Note that old `gpg' engines (before version 2.0.15) do not support
+ this command and will silently ignore it.
+
+ -- Function: gpgme_error_t gpgme_op_passwd_start (gpgme_ctx_t CTX,
+ const gpgme_key_t KEY, unsigned int FLAGS)
+ The function `gpgme_op_passwd_start' initiates a `gpgme_op_passwd'
+ operation. It can be completed by calling `gpgme_wait' on the
+ context. *Note Waiting For Completion::.
+
+ The function returns `0' if the operation was started successfully,
+ and an error code if one of the arguments is not valid or the
+ oepration could not be started.
+
+
+File: gpgme.info, Node: Advanced Key Editing, Prev: Changing Passphrases, Up: Key Management
+
+7.5.10 Advanced Key Editing
+---------------------------
+
+ -- Data type: gpgme_error_t (*gpgme_edit_cb_t) (void *HANDLE,
+gpgme_status_code_t STATUS, const char *ARGS, int FD)
+ The `gpgme_edit_cb_t' type is the type of functions which GPGME
+ calls if it a key edit operation is on-going. The status code
+ STATUS and the argument line ARGS are passed through by GPGME from
+ the crypto engine. The file descriptor FD is -1 for normal status
+ messages. If STATUS indicates a command rather than a status
+ message, the response to the command should be written to FD. The
+ HANDLE is provided by the user at start of operation.
+
+ The function should return `GPG_ERR_NO_ERROR' or an error value.
+
+ -- Function: gpgme_error_t gpgme_op_edit (gpgme_ctx_t CTX,
+ gpgme_key_t KEY, gpgme_edit_cb_t FNC, void *HANDLE,
+ gpgme_data_t OUT)
+ The function `gpgme_op_edit' processes the key KEY interactively,
+ using the edit callback function FNC with the handle HANDLE. The
+ callback is invoked for every status and command request from the
+ crypto engine. The output of the crypto engine is written to the
+ data object OUT.
+
+ Note that the protocol between the callback function and the crypto
+ engine is specific to the crypto engine and no further support in
+ implementing this protocol correctly is provided by GPGME.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the edit
+ operation completes successfully, `GPG_ERR_INV_VALUE' if CTX or
+ KEY is not a valid pointer, and any error returned by the crypto
+ engine or the edit callback handler.
+
+ -- Function: gpgme_error_t gpgme_op_edit_start (gpgme_ctx_t CTX,
+ gpgme_key_t KEY, gpgme_edit_cb_t FNC, void *HANDLE,
+ gpgme_data_t OUT)
+ The function `gpgme_op_edit_start' initiates a `gpgme_op_edit'
+ operation. It can be completed by calling `gpgme_wait' on the
+ context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation was started successfully, and `GPG_ERR_INV_VALUE' if CTX
+ or KEY is not a valid pointer.
+
+ -- Function: gpgme_error_t gpgme_op_card_edit (gpgme_ctx_t CTX,
+ gpgme_key_t KEY, gpgme_edit_cb_t FNC, void *HANDLE,
+ gpgme_data_t OUT)
+ The function `gpgme_op_card_edit' is analogous to `gpgme_op_edit',
+ but should be used to process the smart card corresponding to the
+ key KEY.
+
+ -- Function: gpgme_error_t gpgme_op_card_edit_start (gpgme_ctx_t CTX,
+ gpgme_key_t KEY, gpgme_edit_cb_t FNC, void *HANDLE,
+ gpgme_data_t OUT)
+ The function `gpgme_op_card_edit_start' initiates a
+ `gpgme_op_card_edit' operation. It can be completed by calling
+ `gpgme_wait' on the context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation was started successfully, and `GPG_ERR_INV_VALUE' if CTX
+ or KEY is not a valid pointer.
+
+
+File: gpgme.info, Node: Trust Item Management, Next: Crypto Operations, Prev: Key Management, Up: Contexts
+
+7.6 Trust Item Management
+=========================
+
+*Caution:* The trust items interface is experimental.
+
+ -- Data type: gpgme_trust_item_t
+ The `gpgme_trust_item_t' type is a pointer to a trust item object.
+ It has the following members:
+
+ `char *keyid'
+ This is a string describing the key to which this trust items
+ belongs.
+
+ `int type'
+ This is the type of the trust item. A value of 1 refers to a
+ key, a value of 2 refers to a user ID.
+
+ `int level'
+ This is the trust level.
+
+ `char *owner_trust'
+ The owner trust if `type' is 1.
+
+ `char *validity'
+ The calculated validity.
+
+ `char *name'
+ The user name if `type' is 2.
+
+* Menu:
+
+* Listing Trust Items:: Browsing the list of available trust items.
+* Information About Trust Items:: Requesting information about trust items.
+* Manipulating Trust Items:: Operations on trust items.
+
+
+File: gpgme.info, Node: Listing Trust Items, Next: Information About Trust Items, Up: Trust Item Management
+
+7.6.1 Listing Trust Items
+-------------------------
+
+ -- Function: gpgme_error_t gpgme_op_trustlist_start (gpgme_ctx_t CTX,
+ const char *PATTERN, int MAX_LEVEL)
+ The function `gpgme_op_trustlist_start' initiates a trust item
+ listing operation inside the context CTX. It sets everything up
+ so that subsequent invocations of `gpgme_op_trustlist_next' return
+ the trust items in the list.
+
+ The string PATTERN contains an engine specific expression that is
+ used to limit the list to all trust items matching the pattern. It
+ can not be the empty string.
+
+ The argument MAX_LEVEL is currently ignored.
+
+ The context will be busy until either all trust items are received
+ (and `gpgme_op_trustlist_next' returns `GPG_ERR_EOF'), or
+ `gpgme_op_trustlist_end' is called to finish the operation.
+
+ The function returns the error code `GPG_ERR_INV_VALUE' if CTX is
+ not a valid pointer, and passes through any errors that are
+ reported by the crypto engine support routines.
+
+ -- Function: gpgme_error_t gpgme_op_trustlist_next (gpgme_ctx_t CTX,
+ gpgme_trust_item_t *R_ITEM)
+ The function `gpgme_op_trustlist_next' returns the next trust item
+ in the list created by a previous `gpgme_op_trustlist_start'
+ operation in the context CTX. The trust item can be destroyed
+ with `gpgme_trust_item_release'. *Note Manipulating Trust Items::.
+
+ This is the only way to get at `gpgme_trust_item_t' objects in
+ GPGME.
+
+ If the last trust item in the list has already been returned,
+ `gpgme_op_trustlist_next' returns `GPG_ERR_EOF'.
+
+ The function returns the error code `GPG_ERR_INV_VALUE' if CTX or
+ R_ITEM is not a valid pointer, and `GPG_ERR_ENOMEM' if there is
+ not enough memory for the operation.
+
+ -- Function: gpgme_error_t gpgme_op_trustlist_end (gpgme_ctx_t CTX)
+ The function `gpgme_op_trustlist_end' ends a pending trust list
+ operation in the context CTX.
+
+ The function returns the error code `GPG_ERR_INV_VALUE' if CTX is
+ not a valid pointer, and `GPG_ERR_ENOMEM' if at some time during
+ the operation there was not enough memory available.
+
+
+File: gpgme.info, Node: Information About Trust Items, Next: Manipulating Trust Items, Prev: Listing Trust Items, Up: Trust Item Management
+
+7.6.2 Information About Trust Items
+-----------------------------------
+
+The following interfaces are deprecated and only provided for backward
+compatibility. Don't use them. They will be removed in a future
+version of GPGME.
+
+ Trust items have attributes which can be queried using the interfaces
+below. The attribute identifiers are shared with those for key
+attributes. *Note Information About Keys::.
+
+ -- Function: const char * gpgme_trust_item_get_string_attr
+ (gpgme_trust_item_t ITEM, gpgme_attr_t WHAT,
+ const void *RESERVED, int IDX)
+ The function `gpgme_trust_item_get_string_attr' returns the value
+ of the string-representable attribute WHAT of trust item ITEM.
+ The arguments IDX and RESERVED are reserved for later use and
+ should be `0' and `NULL' respectively.
+
+ The string returned is only valid as long as the key is valid.
+
+ The function returns `0' if an attribute can't be returned as a
+ string, KEY is not a valid pointer, IDX out of range, or RESERVED
+ not `NULL'.
+
+ -- Function: int gpgme_trust_item_get_int_attr
+ (gpgme_trust_item_t ITEM, gpgme_attr_t WHAT,
+ const void *RESERVED, int IDX)
+ The function `gpgme_trust_item_get_int_attr' returns the value of
+ the number-representable attribute WHAT of trust item ITEM. If
+ the attribute occurs more than once in the trust item, the index
+ is specified by IDX. However, currently no such attribute exists,
+ so IDX should be `0'. The argument RESERVED is reserved for later
+ use and should be `NULL'.
+
+ The function returns `0' if the attribute can't be returned as a
+ number, KEY is not a valid pointer, IDX out of range, or RESERVED
+ not `NULL'.
+
+
+File: gpgme.info, Node: Manipulating Trust Items, Prev: Information About Trust Items, Up: Trust Item Management
+
+7.6.3 Manipulating Trust Items
+------------------------------
+
+ -- Function: void gpgme_trust_item_ref (gpgme_trust_item_t ITEM)
+ The function `gpgme_trust_item_ref' acquires an additional
+ reference for the trust item ITEM.
+
+ -- Function: void gpgme_trust_item_unref (gpgme_trust_item_t ITEM)
+ The function `gpgme_trust_item_unref' releases a reference for the
+ trust item ITEM. If this was the last reference, the trust item
+ will be destroyed and all resources associated to it will be
+ released.
+
+ The following interface is deprecated and only provided for backward
+compatibility. Don't use it. It will be removed in a future version
+of GPGME.
+
+ -- Function: void gpgme_trust_item_release (gpgme_trust_item_t ITEM)
+ The function `gpgme_trust_item_release' is an alias for
+ `gpgme_trust_item_unref'.
+
+
+File: gpgme.info, Node: Crypto Operations, Next: Run Control, Prev: Trust Item Management, Up: Contexts
+
+7.7 Crypto Operations
+=====================
+
+Sometimes, the result of a crypto operation returns a list of invalid
+keys encountered in processing the request. The following structure is
+used to hold information about such a key.
+
+ -- Data type: gpgme_invalid_key_t
+ This is a pointer to a structure used to store a part of the
+ result of a crypto operation which takes user IDs as one input
+ parameter. The structure contains the following members:
+
+ `gpgme_invalid_key_t next'
+ This is a pointer to the next invalid key structure in the
+ linked list, or `NULL' if this is the last element.
+
+ `char *fpr'
+ The fingerprint or key ID of the invalid key encountered.
+
+ `gpgme_error_t reason'
+ An error code describing the reason why the key was found
+ invalid.
+
+* Menu:
+
+* Decrypt:: Decrypting a ciphertext.
+* Verify:: Verifying a signature.
+* Decrypt and Verify:: Decrypting a signed ciphertext.
+* Sign:: Creating a signature.
+* Encrypt:: Encrypting a plaintext.
+
+
+File: gpgme.info, Node: Decrypt, Next: Verify, Up: Crypto Operations
+
+7.7.1 Decrypt
+-------------
+
+ -- Function: gpgme_error_t gpgme_op_decrypt (gpgme_ctx_t CTX,
+ gpgme_data_t CIPHER, gpgme_data_t PLAIN)
+ The function `gpgme_op_decrypt' decrypts the ciphertext in the
+ data object CIPHER and stores it into the data object PLAIN.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ ciphertext could be decrypted successfully, `GPG_ERR_INV_VALUE' if
+ CTX, CIPHER or PLAIN is not a valid pointer, `GPG_ERR_NO_DATA' if
+ CIPHER does not contain any data to decrypt,
+ `GPG_ERR_DECRYPT_FAILED' if CIPHER is not a valid cipher text,
+ `GPG_ERR_BAD_PASSPHRASE' if the passphrase for the secret key
+ could not be retrieved, and passes through any errors that are
+ reported by the crypto engine support routines.
+
+ -- Function: gpgme_error_t gpgme_op_decrypt_start (gpgme_ctx_t CTX,
+ gpgme_data_t CIPHER, gpgme_data_t PLAIN)
+ The function `gpgme_op_decrypt_start' initiates a
+ `gpgme_op_decrypt' operation. It can be completed by calling
+ `gpgme_wait' on the context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation could be started successfully, and `GPG_ERR_INV_VALUE'
+ if CIPHER or PLAIN is not a valid pointer.
+
+ -- Data type: gpgme_recipient_t
+ This is a pointer to a structure used to store information about
+ the recipient of an encrypted text which is decrypted in a
+ `gpgme_op_decrypt' operation. This information (except for the
+ status field) is even available before the operation finished
+ successfully, for example in a passphrase callback. The structure
+ contains the following members:
+
+ `gpgme_recipient_t next'
+ This is a pointer to the next recipient structure in the
+ linked list, or `NULL' if this is the last element.
+
+ `gpgme_pubkey_algo_t'
+ The public key algorithm used in the encryption.
+
+ `unsigned int wrong_key_usage : 1'
+ This is true if the key was not used according to its policy.
+
+ `char *keyid'
+ This is the key ID of the key (in hexadecimal digits) used as
+ recipient.
+
+ `gpgme_error_t status'
+ This is an error number with the error code GPG_ERR_NO_SECKEY
+ if the secret key for this recipient is not available, and 0
+ otherwise.
+
+ -- Data type: gpgme_decrypt_result_t
+ This is a pointer to a structure used to store the result of a
+ `gpgme_op_decrypt' operation. After successfully decrypting data,
+ you can retrieve the pointer to the result with
+ `gpgme_op_decrypt_result'. The structure contains the following
+ members:
+
+ `char *unsupported_algorithm'
+ If an unsupported algorithm was encountered, this string
+ describes the algorithm that is not supported.
+
+ `unsigned int wrong_key_usage : 1'
+ This is true if the key was not used according to its policy.
+
+ `gpgme_recipient_t recipients'
+ This is a linked list of recipients to which this message was
+ encrypted.
+
+ `char *file_name'
+ This is the filename of the original plaintext message file
+ if it is known, otherwise this is a null pointer.
+
+ -- Function: gpgme_decrypt_result_t gpgme_op_decrypt_result
+ (gpgme_ctx_t CTX)
+ The function `gpgme_op_decrypt_result' returns a
+ `gpgme_decrypt_result_t' pointer to a structure holding the result
+ of a `gpgme_op_decrypt' operation. The pointer is only valid if
+ the last operation on the context was a `gpgme_op_decrypt' or
+ `gpgme_op_decrypt_start' operation. If the operation failed this
+ might be a `NULL' pointer. The returned pointer is only valid
+ until the next operation is started on the context.
+
+
+File: gpgme.info, Node: Verify, Next: Decrypt and Verify, Prev: Decrypt, Up: Crypto Operations
+
+7.7.2 Verify
+------------
+
+ -- Function: gpgme_error_t gpgme_op_verify (gpgme_ctx_t CTX,
+ gpgme_data_t SIG, gpgme_data_t SIGNED_TEXT,
+ gpgme_data_t PLAIN)
+ The function `gpgme_op_verify' verifies that the signature in the
+ data object SIG is a valid signature. If SIG is a detached
+ signature, then the signed text should be provided in SIGNED_TEXT
+ and PLAIN should be a null pointer. Otherwise, if SIG is a normal
+ (or cleartext) signature, SIGNED_TEXT should be a null pointer and
+ PLAIN should be a writable data object that will contain the
+ plaintext after successful verification.
+
+ The results of the individual signature verifications can be
+ retrieved with `gpgme_op_verify_result'.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation could be completed successfully, `GPG_ERR_INV_VALUE' if
+ CTX, SIG or PLAIN is not a valid pointer, `GPG_ERR_NO_DATA' if SIG
+ does not contain any data to verify, and passes through any errors
+ that are reported by the crypto engine support routines.
+
+ -- Function: gpgme_error_t gpgme_op_verify_start (gpgme_ctx_t CTX,
+ gpgme_data_t SIG, gpgme_data_t SIGNED_TEXT,
+ gpgme_data_t PLAIN)
+ The function `gpgme_op_verify_start' initiates a `gpgme_op_verify'
+ operation. It can be completed by calling `gpgme_wait' on the
+ context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation could be started successfully, `GPG_ERR_INV_VALUE' if
+ CTX, SIG or PLAIN is not a valid pointer, and `GPG_ERR_NO_DATA' if
+ SIG or PLAIN does not contain any data to verify.
+
+ -- Data type: gpgme_sig_notation_t
+ This is a pointer to a structure used to store a part of the
+ result of a `gpgme_op_verify' operation. The structure contains
+ the following members:
+
+ `gpgme_sig_notation_t next'
+ This is a pointer to the next new signature notation
+ structure in the linked list, or `NULL' if this is the last
+ element.
+
+ `char *name'
+ The name of the notation field. If this is `NULL', then the
+ member `value' will contain a policy URL.
+
+ `int name_len'
+ The length of the `name' field. For strings the length is
+ counted without the trailing binary zero.
+
+ `char *value'
+ The value of the notation field. If `name' is `NULL', then
+ this is a policy URL.
+
+ `int value_len'
+ The length of the `value' field. For strings the length is
+ counted without the trailing binary zero.
+
+ `gpgme_sig_notation_flags_t flags'
+ The accumulated flags field. This field contains the flags
+ associated with the notation data in an accumulated form
+ which can be used as an argument to the function
+ `gpgme_sig_notation_add'. The value `flags' is a bitwise-or
+ combination of one or multiple of the following bit values:
+
+ `GPGME_SIG_NOTATION_HUMAN_READABLE'
+ The `GPGME_SIG_NOTATION_HUMAN_READABLE' symbol specifies
+ that the notation data is in human readable form
+
+ `GPGME_SIG_NOTATION_CRITICAL'
+ The `GPGME_SIG_NOTATION_CRITICAL' symbol specifies that
+ the notation data is critical.
+
+
+ `unsigned int human_readable : 1'
+ This is true if the `GPGME_SIG_NOTATION_HUMAN_READABLE' flag
+ is set and false otherwise. This flag is only valid for
+ notation data, not for policy URLs.
+
+ `unsigned int critical : 1'
+ This is true if the `GPGME_SIG_NOTATION_CRITICAL' flag is set
+ and false otherwise. This flag is valid for notation data
+ and policy URLs.
+
+
+ -- Data type: gpgme_signature_t
+ This is a pointer to a structure used to store a part of the
+ result of a `gpgme_op_verify' operation. The structure contains
+ the following members:
+
+ `gpgme_signature_t next'
+ This is a pointer to the next new signature structure in the
+ linked list, or `NULL' if this is the last element.
+
+ `gpgme_sigsum_t summary'
+ This is a bit vector giving a summary of the signature
+ status. It provides an easy interface to a defined semantic
+ of the signature status. Checking just one bit is sufficient
+ to see whether a signature is valid without any restrictions.
+
+ The defined bits are:
+ `GPGME_SIGSUM_VALID'
+ The signature is fully valid.
+
+ `GPGME_SIGSUM_GREEN'
+ The signature is good but one might want to display some
+ extra information. Check the other bits.
+
+ `GPGME_SIGSUM_RED'
+ The signature is bad. It might be useful to check other
+ bits and display more information, i.e. a revoked
+ certificate might not render a signature invalid when
+ the message was received prior to the cause for the
+ revocation.
+
+ `GPGME_SIGSUM_KEY_REVOKED'
+ The key or at least one certificate has been revoked.
+
+ `GPGME_SIGSUM_KEY_EXPIRED'
+ The key or one of the certificates has expired. It is
+ probably a good idea to display the date of the
+ expiration.
+
+ `GPGME_SIGSUM_SIG_EXPIRED'
+ The signature has expired.
+
+ `GPGME_SIGSUM_KEY_MISSING'
+ Can't verify due to a missing key or certificate.
+
+ `GPGME_SIGSUM_CRL_MISSING'
+ The CRL (or an equivalent mechanism) is not available.
+
+ `GPGME_SIGSUM_CRL_TOO_OLD'
+ Available CRL is too old.
+
+ `GPGME_SIGSUM_BAD_POLICY'
+ A policy requirement was not met.
+
+ `GPGME_SIGSUM_SYS_ERROR'
+ A system error occured.
+
+ `char *fpr'
+ This is the fingerprint or key ID of the signature.
+
+ `gpgme_error_t status'
+ This is the status of the signature. In particular, the
+ following status codes are of interest:
+
+ `GPG_ERR_NO_ERROR'
+ This status indicates that the signature is valid. For
+ the combined result this status means that all
+ signatures are valid.
+
+ `GPG_ERR_SIG_EXPIRED'
+ This status indicates that the signature is valid but
+ expired. For the combined result this status means
+ that all signatures are valid and expired.
+
+ `GPG_ERR_KEY_EXPIRED'
+ This status indicates that the signature is valid but
+ the key used to verify the signature has expired. For
+ the combined result this status means that all
+ signatures are valid and all keys are expired.
+
+ `GPG_ERR_CERT_REVOKED'
+ This status indicates that the signature is valid but
+ the key used to verify the signature has been revoked.
+ For the combined result this status means that all
+ signatures are valid and all keys are revoked.
+
+ `GPG_ERR_BAD_SIGNATURE'
+ This status indicates that the signature is invalid.
+ For the combined result this status means that all
+ signatures are invalid.
+
+ `GPG_ERR_NO_PUBKEY'
+ This status indicates that the signature could not be
+ verified due to a missing key. For the combined
+ result this status means that all signatures could not
+ be checked due to missing keys.
+
+ `GPG_ERR_GENERAL'
+ This status indicates that there was some other error
+ which prevented the signature verification.
+
+ `gpgme_sig_notation_t notations'
+ This is a linked list with the notation data and policy URLs.
+
+ `unsigned long timestamp'
+ The creation timestamp of this signature.
+
+ `unsigned long exp_timestamp'
+ The expiration timestamp of this signature, or 0 if the
+ signature does not expire.
+
+ `unsigned int wrong_key_usage : 1'
+ This is true if the key was not used according to its policy.
+
+ `unsigned int pka_trust : 2'
+ This is set to the trust information gained by means of the
+ PKA system. Values are:
+ `0'
+ No PKA information available or verification not
+ possible.
+
+ `1'
+ PKA verification failed.
+
+ `2'
+ PKA verification succeeded.
+
+ `3'
+ Reserved for future use.
+ Depending on the configuration of the engine, this metric may
+ also be reflected by the validity of the signature.
+
+ `unsigned int chain_model : 1'
+ This is true if the validity of the signature has been
+ checked using the chain model. In the chain model the time
+ the signature has been created must be within the validity
+ period of the certificate and the time the certificate itself
+ has been created must be within the validity period of the
+ issuing certificate. In contrast the default validation model
+ checks the validity of signature as well at the entire
+ certificate chain at the current time.
+
+ `gpgme_validity_t validity'
+ The validity of the signature.
+
+ `gpgme_error_t validity_reason'
+ If a signature is not valid, this provides a reason why.
+
+ `gpgme_pubkey_algo_t'
+ The public key algorithm used to create this signature.
+
+ `gpgme_hash_algo_t'
+ The hash algorithm used to create this signature.
+
+ -- Data type: gpgme_verify_result_t
+ This is a pointer to a structure used to store the result of a
+ `gpgme_op_verify' operation. After verifying a signature, you can
+ retrieve the pointer to the result with `gpgme_op_verify_result'.
+ If the operation failed this might be a `NULL' pointer. The
+ structure contains the following member:
+
+ `gpgme_signature_t signatures'
+ A linked list with information about all signatures for which
+ a verification was attempted.
+
+ `char *file_name'
+ This is the filename of the original plaintext message file
+ if it is known, otherwise this is a null pointer.
+
+ -- Function: gpgme_verify_result_t gpgme_op_verify_result
+ (gpgme_ctx_t CTX)
+ The function `gpgme_op_verify_result' returns a
+ `gpgme_verify_result_t' pointer to a structure holding the result
+ of a `gpgme_op_verify' operation. The pointer is only valid if
+ the last operation on the context was a `gpgme_op_verify',
+ `gpgme_op_verify_start', `gpgme_op_decrypt_verify' or
+ `gpgme_op_decrypt_verify_start' operation, and if this operation
+ finished successfully (for `gpgme_op_decrypt_verify' and
+ `gpgme_op_decrypt_verify_start', the error code `GPG_ERR_NO_DATA'
+ counts as successful in this context). The returned pointer is
+ only valid until the next operation is started on the context.
+
+ The following interfaces are deprecated and only provided for
+backward compatibility. Don't use them. They will be removed in a
+future version of GPGME.
+
+ -- Data type: enum gpgme_sig_stat_t
+ The `gpgme_sig_stat_t' type holds the result of a signature check,
+ or the combined result of all signatures. The following results
+ are possible:
+
+ `GPGME_SIG_STAT_NONE'
+ This status should not occur in normal operation.
+
+ `GPGME_SIG_STAT_GOOD'
+ This status indicates that the signature is valid. For the
+ combined result this status means that all signatures are
+ valid.
+
+ `GPGME_SIG_STAT_GOOD_EXP'
+ This status indicates that the signature is valid but
+ expired. For the combined result this status means that all
+ signatures are valid and expired.
+
+ `GPGME_SIG_STAT_GOOD_EXPKEY'
+ This status indicates that the signature is valid but the key
+ used to verify the signature has expired. For the combined
+ result this status means that all signatures are valid and
+ all keys are expired.
+
+ `GPGME_SIG_STAT_BAD'
+ This status indicates that the signature is invalid. For the
+ combined result this status means that all signatures are
+ invalid.
+
+ `GPGME_SIG_STAT_NOKEY'
+ This status indicates that the signature could not be
+ verified due to a missing key. For the combined result this
+ status means that all signatures could not be checked due to
+ missing keys.
+
+ `GPGME_SIG_STAT_NOSIG'
+ This status indicates that the signature data provided was
+ not a real signature.
+
+ `GPGME_SIG_STAT_ERROR'
+ This status indicates that there was some other error which
+ prevented the signature verification.
+
+ `GPGME_SIG_STAT_DIFF'
+ For the combined result this status means that at least two
+ signatures have a different status. You can get each key's
+ status with `gpgme_get_sig_status'.
+
+ -- Function: const char * gpgme_get_sig_status (gpgme_ctx_t CTX,
+ int IDX, gpgme_sig_stat_t *R_STAT, time_t *R_CREATED)
+ The function `gpgme_get_sig_status' is equivalent to:
+
+ gpgme_verify_result_t result;
+ gpgme_signature_t sig;
+
+ result = gpgme_op_verify_result (ctx);
+ sig = result->signatures;
+
+ while (sig && idx)
+ {
+ sig = sig->next;
+ idx--;
+ }
+ if (!sig || idx)
+ return NULL;
+
+ if (r_stat)
+ {
+ switch (gpg_err_code (sig->status))
+ {
+ case GPG_ERR_NO_ERROR:
+ *r_stat = GPGME_SIG_STAT_GOOD;
+ break;
+
+ case GPG_ERR_BAD_SIGNATURE:
+ *r_stat = GPGME_SIG_STAT_BAD;
+ break;
+
+ case GPG_ERR_NO_PUBKEY:
+ *r_stat = GPGME_SIG_STAT_NOKEY;
+ break;
+
+ case GPG_ERR_NO_DATA:
+ *r_stat = GPGME_SIG_STAT_NOSIG;
+ break;
+
+ case GPG_ERR_SIG_EXPIRED:
+ *r_stat = GPGME_SIG_STAT_GOOD_EXP;
+ break;
+
+ case GPG_ERR_KEY_EXPIRED:
+ *r_stat = GPGME_SIG_STAT_GOOD_EXPKEY;
+ break;
+
+ default:
+ *r_stat = GPGME_SIG_STAT_ERROR;
+ break;
+ }
+ }
+ if (r_created)
+ *r_created = sig->timestamp;
+ return sig->fpr;
+
+ -- Function: const char * gpgme_get_sig_string_attr (gpgme_ctx_t CTX,
+ int IDX, gpgme_attr_t WHAT, int WHATIDX)
+ The function `gpgme_get_sig_string_attr' is equivalent to:
+
+ gpgme_verify_result_t result;
+ gpgme_signature_t sig;
+
+ result = gpgme_op_verify_result (ctx);
+ sig = result->signatures;
+
+ while (sig && idx)
+ {
+ sig = sig->next;
+ idx--;
+ }
+ if (!sig || idx)
+ return NULL;
+
+ switch (what)
+ {
+ case GPGME_ATTR_FPR:
+ return sig->fpr;
+
+ case GPGME_ATTR_ERRTOK:
+ if (whatidx == 1)
+ return sig->wrong_key_usage ? "Wrong_Key_Usage" : "";
+ else
+ return "";
+ default:
+ break;
+ }
+
+ return NULL;
+
+ -- Function: const char * gpgme_get_sig_ulong_attr (gpgme_ctx_t CTX,
+ int IDX, gpgme_attr_t WAHT, int WHATIDX)
+ The function `gpgme_get_sig_ulong_attr' is equivalent to:
+
+ gpgme_verify_result_t result;
+ gpgme_signature_t sig;
+
+ result = gpgme_op_verify_result (ctx);
+ sig = result->signatures;
+
+ while (sig && idx)
+ {
+ sig = sig->next;
+ idx--;
+ }
+ if (!sig || idx)
+ return 0;
+
+ switch (what)
+ {
+ case GPGME_ATTR_CREATED:
+ return sig->timestamp;
+
+ case GPGME_ATTR_EXPIRE:
+ return sig->exp_timestamp;
+
+ case GPGME_ATTR_VALIDITY:
+ return (unsigned long) sig->validity;
+
+ case GPGME_ATTR_SIG_STATUS:
+ switch (sig->status)
+ {
+ case GPG_ERR_NO_ERROR:
+ return GPGME_SIG_STAT_GOOD;
+
+ case GPG_ERR_BAD_SIGNATURE:
+ return GPGME_SIG_STAT_BAD;
+
+ case GPG_ERR_NO_PUBKEY:
+ return GPGME_SIG_STAT_NOKEY;
+
+ case GPG_ERR_NO_DATA:
+ return GPGME_SIG_STAT_NOSIG;
+
+ case GPG_ERR_SIG_EXPIRED:
+ return GPGME_SIG_STAT_GOOD_EXP;
+
+ case GPG_ERR_KEY_EXPIRED:
+ return GPGME_SIG_STAT_GOOD_EXPKEY;
+
+ default:
+ return GPGME_SIG_STAT_ERROR;
+ }
+
+ case GPGME_ATTR_SIG_SUMMARY:
+ return sig->summary;
+
+ default:
+ break;
+ }
+ return 0;
+
+ -- Function: const char * gpgme_get_sig_key (gpgme_ctx_t CTX, int IDX,
+ gpgme_key_t *R_KEY)
+ The function `gpgme_get_sig_key' is equivalent to:
+
+ gpgme_verify_result_t result;
+ gpgme_signature_t sig;
+
+ result = gpgme_op_verify_result (ctx);
+ sig = result->signatures;
+
+ while (sig && idx)
+ {
+ sig = sig->next;
+ idx--;
+ }
+ if (!sig || idx)
+ return gpg_error (GPG_ERR_EOF);
+
+ return gpgme_get_key (ctx, sig->fpr, r_key, 0);
+
+
+File: gpgme.info, Node: Decrypt and Verify, Next: Sign, Prev: Verify, Up: Crypto Operations
+
+7.7.3 Decrypt and Verify
+------------------------
+
+ -- Function: gpgme_error_t gpgme_op_decrypt_verify (gpgme_ctx_t CTX,
+ gpgme_data_t CIPHER, gpgme_data_t PLAIN)
+ The function `gpgme_op_decrypt_verify' decrypts the ciphertext in
+ the data object CIPHER and stores it into the data object PLAIN.
+ If CIPHER contains signatures, they will be verified.
+
+ After the operation completed, `gpgme_op_decrypt_result' and
+ `gpgme_op_verify_result' can be used to retrieve more information
+ about the signatures.
+
+ If the error code `GPG_ERR_NO_DATA' is returned, CIPHER does not
+ contain any data to decrypt. However, it might still be signed.
+ The information about detected signatures is available with
+ `gpgme_op_verify_result' in this case.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ ciphertext could be decrypted successfully, `GPG_ERR_INV_VALUE' if
+ CTX, CIPHER or PLAIN is not a valid pointer, `GPG_ERR_NO_DATA' if
+ CIPHER does not contain any data to decrypt,
+ `GPG_ERR_DECRYPT_FAILED' if CIPHER is not a valid cipher text,
+ `GPG_ERR_BAD_PASSPHRASE' if the passphrase for the secret key
+ could not be retrieved, and passes through any errors that are
+ reported by the crypto engine support routines.
+
+ -- Function: gpgme_error_t gpgme_op_decrypt_verify (gpgme_ctx_t CTX,
+ gpgme_data_t CIPHER, gpgme_data_t PLAIN)
+ The function `gpgme_op_decrypt_verify_start' initiates a
+ `gpgme_op_decrypt_verify' operation. It can be completed by
+ calling `gpgme_wait' on the context. *Note Waiting For
+ Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation could be started successfully, `GPG_ERR_INV_VALUE' if
+ CTX, CIPHER, PLAIN or R_STAT is not a valid pointer, and
+ `GPG_ERR_NO_DATA' if CIPHER does not contain any data to decrypt.
+
+
+File: gpgme.info, Node: Sign, Next: Encrypt, Prev: Decrypt and Verify, Up: Crypto Operations
+
+7.7.4 Sign
+----------
+
+A signature can contain signatures by one or more keys. The set of
+keys used to create a signatures is contained in a context, and is
+applied to all following signing operations in this context (until the
+set is changed).
+
+* Menu:
+
+* Selecting Signers:: How to choose the keys to sign with.
+* Creating a Signature:: How to create a signature.
+* Signature Notation Data:: How to add notation data to a signature.
+
+
+File: gpgme.info, Node: Selecting Signers, Next: Creating a Signature, Up: Sign
+
+7.7.4.1 Selecting Signers
+.........................
+
+ -- Function: void gpgme_signers_clear (gpgme_ctx_t CTX)
+ The function `gpgme_signers_clear' releases a reference for each
+ key on the signers list and removes the list of signers from the
+ context CTX.
+
+ Every context starts with an empty list.
+
+ -- Function: gpgme_error_t gpgme_signers_add (gpgme_ctx_t CTX,
+ const gpgme_key_t KEY)
+ The function `gpgme_signers_add' adds the key KEY to the list of
+ signers in the context CTX.
+
+ Calling this function acquires an additional reference for the key.
+
+ -- Function: gpgme_key_t gpgme_signers_enum (const gpgme_ctx_t CTX,
+ int SEQ)
+ The function `gpgme_signers_enum' returns the SEQth key in the
+ list of signers in the context CTX. An additional reference is
+ acquired for the user.
+
+ If SEQ is out of range, `NULL' is returned.
+
+
+File: gpgme.info, Node: Creating a Signature, Next: Signature Notation Data, Prev: Selecting Signers, Up: Sign
+
+7.7.4.2 Creating a Signature
+............................
+
+ -- Data type: enum gpgme_sig_mode_t
+ The `gpgme_sig_mode_t' type is used to specify the desired type of
+ a signature. The following modes are available:
+
+ `GPGME_SIG_MODE_NORMAL'
+ A normal signature is made, the output includes the plaintext
+ and the signature.
+
+ `GPGME_SIG_MODE_DETACH'
+ A detached signature is made.
+
+ `GPGME_SIG_MODE_CLEAR'
+ A clear text signature is made. The ASCII armor and text
+ mode settings of the context are ignored.
+
+ -- Function: gpgme_error_t gpgme_op_sign (gpgme_ctx_t CTX,
+ gpgme_data_t PLAIN, gpgme_data_t SIG, gpgme_sig_mode_t MODE)
+ The function `gpgme_op_sign' creates a signature for the text in
+ the data object PLAIN and returns it in the data object SIG. The
+ type of the signature created is determined by the ASCII armor
+ (or, if that is not set, by the encoding specified for SIG), the
+ text mode attributes set for the context CTX and the requested
+ signature mode MODE.
+
+ After the operation completed successfully, the result can be
+ retrieved with `gpgme_op_sign_result'.
+
+ If an S/MIME signed message is created using the CMS crypto engine,
+ the number of certificates to include in the message can be
+ specified with `gpgme_set_include_certs'. *Note Included
+ Certificates::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ signature could be created successfully, `GPG_ERR_INV_VALUE' if
+ CTX, PLAIN or SIG is not a valid pointer, `GPG_ERR_NO_DATA' if the
+ signature could not be created, `GPG_ERR_BAD_PASSPHRASE' if the
+ passphrase for the secret key could not be retrieved,
+ `GPG_ERR_UNUSABLE_SECKEY' if there are invalid signers, and passes
+ through any errors that are reported by the crypto engine support
+ routines.
+
+ -- Function: gpgme_error_t gpgme_op_sign_start (gpgme_ctx_t CTX,
+ gpgme_data_t PLAIN, gpgme_data_t SIG, gpgme_sig_mode_t MODE)
+ The function `gpgme_op_sign_start' initiates a `gpgme_op_sign'
+ operation. It can be completed by calling `gpgme_wait' on the
+ context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation could be started successfully, and `GPG_ERR_INV_VALUE'
+ if CTX, PLAIN or SIG is not a valid pointer.
+
+ -- Data type: gpgme_new_signature_t
+ This is a pointer to a structure used to store a part of the
+ result of a `gpgme_op_sign' operation. The structure contains the
+ following members:
+
+ `gpgme_new_signature_t next'
+ This is a pointer to the next new signature structure in the
+ linked list, or `NULL' if this is the last element.
+
+ `gpgme_sig_mode_t type'
+ The type of this signature.
+
+ `gpgme_pubkey_algo_t'
+ The public key algorithm used to create this signature.
+
+ `gpgme_hash_algo_t'
+ The hash algorithm used to create this signature.
+
+ `unsigned int sig_class'
+ The signature class of this signature.
+
+ `long int timestamp'
+ The creation timestamp of this signature.
+
+ `char *fpr'
+ The fingerprint of the key which was used to create this
+ signature.
+
+ -- Data type: gpgme_sign_result_t
+ This is a pointer to a structure used to store the result of a
+ `gpgme_op_sign' operation. After successfully generating a
+ signature, you can retrieve the pointer to the result with
+ `gpgme_op_sign_result'. The structure contains the following
+ members:
+
+ `gpgme_invalid_key_t invalid_signers'
+ A linked list with information about all invalid keys for
+ which a signature could not be created.
+
+ `gpgme_new_signature_t signatures'
+ A linked list with information about all signatures created.
+
+ -- Function: gpgme_sign_result_t gpgme_op_sign_result (gpgme_ctx_t CTX)
+ The function `gpgme_op_sign_result' returns a
+ `gpgme_sign_result_t' pointer to a structure holding the result of
+ a `gpgme_op_sign' operation. The pointer is only valid if the
+ last operation on the context was a `gpgme_op_sign',
+ `gpgme_op_sign_start', `gpgme_op_encrypt_sign' or
+ `gpgme_op_encrypt_sign_start' operation. If that operation
+ failed, the function might return a `NULL' pointer. The returned
+ pointer is only valid until the next operation is started on the
+ context.
+
+
+File: gpgme.info, Node: Signature Notation Data, Prev: Creating a Signature, Up: Sign
+
+7.7.4.3 Signature Notation Data
+...............................
+
+Using the following functions, you can attach arbitrary notation data
+to a signature. This information is then available to the user when
+the signature is verified.
+
+ -- Function: void gpgme_sig_notation_clear (gpgme_ctx_t CTX)
+ The function `gpgme_sig_notation_clear' removes the notation data
+ from the context CTX. Subsequent signing operations from this
+ context will not include any notation data.
+
+ Every context starts with an empty notation data list.
+
+ -- Function: gpgme_error_t gpgme_sig_notation_add (gpgme_ctx_t CTX,
+ const char *NAME, const char *VALUE,
+ gpgme_sig_notation_flags_t FLAGS)
+ The function `gpgme_sig_notation_add' adds the notation data with
+ the name NAME and the value VALUE to the context CTX.
+
+ Subsequent signing operations will include this notation data, as
+ well as any other notation data that was added since the creation
+ of the context or the last `gpgme_sig_notation_clear' operation.
+
+ The arguments NAME and VALUE must be `NUL'-terminated strings in
+ human-readable form. The flag `GPGME_SIG_NOTATION_HUMAN_READABLE'
+ is implied (non-human-readable notation data is currently not
+ supported). The strings must be in UTF-8 encoding.
+
+ If NAME is `NULL', then VALUE should be a policy URL.
+
+ The function `gpgme_sig_notation_add' returns the error code
+ `GPG_ERR_NO_ERROR' if the notation data could be added
+ successfully, `GPG_ERR_INV_VALUE' if CTX is not a valid pointer,
+ or if NAME, VALUE and FLAGS are an invalid combination. The
+ function also passes through any errors that are reported by the
+ crypto engine support routines.
+
+ -- Function: gpgme_sig_notation_t gpgme_sig_notation_get
+ (const gpgme_ctx_t CTX)
+ The function `gpgme_sig_notation_get' returns the linked list of
+ notation data structures that are contained in the context CTX.
+
+ If CTX is not a valid pointer, or there is no notation data added
+ for this context, `NULL' is returned.
+
+
+File: gpgme.info, Node: Encrypt, Prev: Sign, Up: Crypto Operations
+
+7.7.5 Encrypt
+-------------
+
+One plaintext can be encrypted for several recipients at the same time.
+The list of recipients is created independently of any context, and
+then passed to the encryption operation.
+
+* Menu:
+
+* Encrypting a Plaintext:: How to encrypt a plaintext.
+
+
+File: gpgme.info, Node: Encrypting a Plaintext, Up: Encrypt
+
+7.7.5.1 Encrypting a Plaintext
+..............................
+
+ -- Function: gpgme_error_t gpgme_op_encrypt (gpgme_ctx_t CTX,
+ gpgme_key_t RECP[], gpgme_encrypt_flags_t FLAGS,
+ gpgme_data_t PLAIN, gpgme_data_t CIPHER)
+ The function `gpgme_op_encrypt' encrypts the plaintext in the data
+ object PLAIN for the recipients RECP and stores the ciphertext in
+ the data object CIPHER. The type of the ciphertext created is
+ determined by the ASCII armor (or, if that is not set, by the
+ encoding specified for CIPHER) and the text mode attributes set
+ for the context CTX.
+
+ KEY must be a `NULL'-terminated array of keys. The user must keep
+ references for all keys during the whole duration of the call (but
+ see `gpgme_op_encrypt_start' for the requirements with the
+ asynchronous variant).
+
+ The value in FLAGS is a bitwise-or combination of one or multiple
+ of the following bit values:
+
+ `GPGME_ENCRYPT_ALWAYS_TRUST'
+ The `GPGME_ENCRYPT_ALWAYS_TRUST' symbol specifies that all the
+ recipients in RECP should be trusted, even if the keys do not
+ have a high enough validity in the keyring. This flag should
+ be used with care; in general it is not a good idea to use
+ any untrusted keys.
+
+ `GPGME_ENCRYPT_NO_ENCRYPT_TO'
+ The `GPGME_ENCRYPT_NO_ENCRYPT_TO' symbol specifies that no
+ default or hidden default recipients as configured in the
+ crypto backend should be included. This can be useful for
+ managing different user profiles.
+
+ If `GPG_ERR_UNUSABLE_PUBKEY' is returned, some recipients in RECP
+ are invalid, but not all. In this case the plaintext might be
+ encrypted for all valid recipients and returned in CIPHER (if this
+ happens depends on the crypto engine). More information about the
+ invalid recipients is available with `gpgme_op_encrypt_result'.
+
+ If RECP is `NULL', symmetric rather than public key encryption is
+ performed. Symmetrically encrypted cipher text can be deciphered
+ with `gpgme_op_decrypt'. Note that in this case the crypto
+ backend needs to retrieve a passphrase from the user. Symmetric
+ encryption is currently only supported for the OpenPGP crypto
+ backend.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ ciphertext could be created successfully, `GPG_ERR_INV_VALUE' if
+ CTX, RECP, PLAIN or CIPHER is not a valid pointer,
+ `GPG_ERR_UNUSABLE_PUBKEY' if RECP contains some invalid
+ recipients, `GPG_ERR_BAD_PASSPHRASE' if the passphrase for the
+ symmetric key could not be retrieved, and passes through any
+ errors that are reported by the crypto engine support routines.
+
+ -- Function: gpgme_error_t gpgme_op_encrypt_start (gpgme_ctx_t CTX,
+ gpgme_key_t RECP[], gpgme_encrypt_flags_t FLAGS,
+ gpgme_data_t PLAIN, gpgme_data_t CIPHER)
+ The function `gpgme_op_encrypt_start' initiates a
+ `gpgme_op_encrypt' operation. It can be completed by calling
+ `gpgme_wait' on the context. *Note Waiting For Completion::.
+
+ References to the keys only need to be held for the duration of
+ this call. The user can release its references to the keys after
+ this function returns, even if the operation is not yet finished.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation could be started successfully, `GPG_ERR_INV_VALUE' if
+ CTX, RSET, PLAIN or CIPHER is not a valid pointer, and
+ `GPG_ERR_UNUSABLE_PUBKEY' if RSET does not contain any valid
+ recipients.
+
+ -- Data type: gpgme_encrypt_result_t
+ This is a pointer to a structure used to store the result of a
+ `gpgme_op_encrypt' operation. After successfully encrypting data,
+ you can retrieve the pointer to the result with
+ `gpgme_op_encrypt_result'. The structure contains the following
+ members:
+
+ `gpgme_invalid_key_t invalid_recipients'
+ A linked list with information about all invalid keys for
+ which the data could not be encrypted.
+
+ -- Function: gpgme_encrypt_result_t gpgme_op_encrypt_result
+ (gpgme_ctx_t CTX)
+ The function `gpgme_op_encrypt_result' returns a
+ `gpgme_encrypt_result_t' pointer to a structure holding the result
+ of a `gpgme_op_encrypt' operation. The pointer is only valid if
+ the last operation on the context was a `gpgme_op_encrypt',
+ `gpgme_op_encrypt_start', `gpgme_op_sign' or `gpgme_op_sign_start'
+ operation. If this operation failed, this might be a `NULL'
+ pointer. The returned pointer is only valid until the next
+ operation is started on the context.
+
+ -- Function: gpgme_error_t gpgme_op_encrypt_sign (gpgme_ctx_t CTX,
+ gpgme_key_t RECP[], gpgme_encrypt_flags_t FLAGS,
+ gpgme_data_t PLAIN, gpgme_data_t CIPHER)
+ The function `gpgme_op_encrypt_sign' does a combined encrypt and
+ sign operation. It is used like `gpgme_op_encrypt', but the
+ ciphertext also contains signatures for the signers listed in CTX.
+
+ The combined encrypt and sign operation is currently only available
+ for the OpenPGP crypto engine.
+
+ -- Function: gpgme_error_t gpgme_op_encrypt_sign_start
+ (gpgme_ctx_t CTX, gpgme_key_t RECP,
+ gpgme_encrypt_flags_t FLAGS, gpgme_data_t PLAIN,
+ gpgme_data_t CIPHER)
+ The function `gpgme_op_encrypt_sign_start' initiates a
+ `gpgme_op_encrypt_sign' operation. It can be completed by calling
+ `gpgme_wait' on the context. *Note Waiting For Completion::.
+
+ The function returns the error code `GPG_ERR_NO_ERROR' if the
+ operation could be started successfully, and `GPG_ERR_INV_VALUE'
+ if CTX, RSET, PLAIN or CIPHER is not a valid pointer.
+
+
+File: gpgme.info, Node: Run Control, Prev: Crypto Operations, Up: Contexts
+
+7.8 Run Control
+===============
+
+GPGME supports running operations synchronously and asynchronously.
+You can use asynchronous operation to set up a context up to initiating
+the desired operation, but delay performing it to a later point.
+
+ Furthermore, you can use an external event loop to control exactly
+when GPGME runs. This ensures that GPGME only runs when necessary and
+also prevents it from blocking for a long time.
+
+* Menu:
+
+* Waiting For Completion:: Waiting until an operation is completed.
+* Using External Event Loops:: Advanced control over what happens when.
+* Cancellation:: How to end pending operations prematurely.
+
+
+File: gpgme.info, Node: Waiting For Completion, Next: Using External Event Loops, Up: Run Control
+
+7.8.1 Waiting For Completion
+----------------------------
+
+ -- Function: gpgme_ctx_t gpgme_wait (gpgme_ctx_t CTX,
+ gpgme_error_t *STATUS, int HANG)
+ The function `gpgme_wait' continues the pending operation within
+ the context CTX. In particular, it ensures the data exchange
+ between GPGME and the crypto backend and watches over the run time
+ status of the backend process.
+
+ If HANG is true, the function does not return until the operation
+ is completed or cancelled. Otherwise the function will not block
+ for a long time.
+
+ The error status of the finished operation is returned in STATUS
+ if `gpgme_wait' does not return `NULL'.
+
+ The CTX argument can be `NULL'. In that case, `gpgme_wait' waits
+ for any context to complete its operation.
+
+ `gpgme_wait' can be used only in conjunction with any context that
+ has a pending operation initiated with one of the
+ `gpgme_op_*_start' functions except `gpgme_op_keylist_start' and
+ `gpgme_op_trustlist_start' (for which you should use the
+ corresponding `gpgme_op_*_next' functions). If CTX is `NULL', all
+ of such contexts are waited upon and possibly returned.
+ Synchronous operations running in parallel, as well as key and
+ trust item list operations, do not affect `gpgme_wait'.
+
+ In a multi-threaded environment, only one thread should ever call
+ `gpgme_wait' at any time, irregardless if CTX is specified or not.
+ This means that all calls to this function should be fully
+ synchronized by locking primitives. It is safe to start
+ asynchronous operations while a thread is running in `gpgme_wait'.
+
+ The function returns the CTX of the context which has finished the
+ operation. If HANG is false, and the timeout expires, `NULL' is
+ returned and `*status' will be set to 0. If an error occurs,
+ `NULL' is returned and the error is returned in `*status'.
+
+
+File: gpgme.info, Node: Using External Event Loops, Next: Cancellation, Prev: Waiting For Completion, Up: Run Control
+
+7.8.2 Using External Event Loops
+--------------------------------
+
+GPGME hides the complexity of the communication between the library and
+the crypto engine. The price of this convenience is that the calling
+thread can block arbitrary long waiting for the data returned by the
+crypto engine. In single-threaded programs, in particular if they are
+interactive, this is an unwanted side-effect. OTOH, if `gpgme_wait' is
+used without the HANG option being enabled, it might be called
+unnecessarily often, wasting CPU time that could be used otherwise.
+
+ The I/O callback interface described in this section lets the user
+take control over what happens when. GPGME will provide the user with
+the file descriptors that should be monitored, and the callback
+functions that should be invoked when a file descriptor is ready for
+reading or writing. It is then the user's responsibility to decide
+when to check the file descriptors and when to invoke the callback
+functions. Usually this is done in an event loop, that also checks for
+events in other parts of the program. If the callback functions are
+only called when the file descriptors are ready, GPGME will never
+block. This gives the user more control over the program flow, and
+allows to perform other tasks when GPGME would block otherwise.
+
+ By using this advanced mechanism, GPGME can be integrated smoothly
+into GUI toolkits like GTK+ even for single-threaded programs.
+
+* Menu:
+
+* I/O Callback Interface:: How I/O callbacks are registered.
+* Registering I/O Callbacks:: How to use I/O callbacks for a context.
+* I/O Callback Example:: An example how to use I/O callbacks.
+* I/O Callback Example GTK+:: How to use GPGME with GTK+.
+* I/O Callback Example GDK:: How to use GPGME with GDK.
+* I/O Callback Example Qt:: How to use GPGME with Qt.
+
+
+File: gpgme.info, Node: I/O Callback Interface, Next: Registering I/O Callbacks, Up: Using External Event Loops
+
+7.8.2.1 I/O Callback Interface
+..............................
+
+ -- Data type: gpgme_error_t (*gpgme_io_cb_t) (void *DATA, int FD)
+ The `gpgme_io_cb_t' type is the type of functions which GPGME
+ wants to register as I/O callback handlers using the
+ `gpgme_register_io_cb_t' functions provided by the user.
+
+ DATA and FD are provided by GPGME when the I/O callback handler is
+ registered, and should be passed through to the handler when it is
+ invoked by the user because it noticed activity on the file
+ descriptor FD.
+
+ The callback handler always returns `0', but you should consider
+ the return value to be reserved for later use.
+
+ -- Data type: gpgme_error_t (*gpgme_register_io_cb_t) (void *DATA,
+int FD, int DIR, gpgme_io_cb_t FNC, void *FNC_DATA, void **TAG)
+ The `gpgme_register_io_cb_t' type is the type of functions which
+ can be called by GPGME to register an I/O callback function FNC
+ for the file descriptor FD with the user. FNC_DATA should be
+ passed as the first argument to FNC when the handler is invoked
+ (the second argument should be FD). If DIR is 0, FNC should be
+ called by the user when FD is ready for writing. If DIR is 1, FNC
+ should be called when FD is ready for reading.
+
+ DATA was provided by the user when registering the
+ `gpgme_register_io_cb_t' function with GPGME and will always be
+ passed as the first argument when registering a callback function.
+ For example, the user can use this to determine the event loop to
+ which the file descriptor should be added.
+
+ GPGME will call this function when a crypto operation is initiated
+ in a context for which the user has registered I/O callback
+ handler functions with `gpgme_set_io_cbs'. It can also call this
+ function when it is in an I/O callback handler for a file
+ descriptor associated to this context.
+
+ The user should return a unique handle in TAG identifying this I/O
+ callback registration, which will be passed to the
+ `gpgme_register_io_cb_t' function without interpretation when the
+ file descriptor should not be monitored anymore.
+
+ -- Data type: void (*gpgme_remove_io_cb_t) (void *TAG)
+ The `gpgme_remove_io_cb_t' type is the type of functions which can
+ be called by GPGME to remove an I/O callback handler that was
+ registered before. TAG is the handle that was returned by the
+ `gpgme_register_io_cb_t' for this I/O callback.
+
+ GPGME can call this function when a crypto operation is in an I/O
+ callback. It will also call this function when the context is
+ destroyed while an operation is pending.
+
+ -- Data type: enum gpgme_event_io_t
+ The `gpgme_event_io_t' type specifies the type of an event that is
+ reported to the user by GPGME as a consequence of an I/O
+ operation. The following events are defined:
+
+ `GPGME_EVENT_START'
+ The operation is fully initialized now, and you can start to
+ run the registered I/O callback handlers now. Note that
+ registered I/O callback handlers must not be run before this
+ event is signalled. TYPE_DATA is `NULL' and reserved for
+ later use.
+
+ `GPGME_EVENT_DONE'
+ The operation is finished, the last I/O callback for this
+ operation was removed. The accompanying TYPE_DATA points to a
+ `gpgme_error_t' variable that contains the status of the
+ operation that finished. This event is signalled after the
+ last I/O callback has been removed.
+
+ `GPGME_EVENT_NEXT_KEY'
+ In a `gpgme_op_keylist_start' operation, the next key was
+ received from the crypto engine. The accompanying TYPE_DATA
+ is a `gpgme_key_t' variable that contains the key with one
+ reference for the user.
+
+ `GPGME_EVENT_NEXT_TRUSTITEM'
+ In a `gpgme_op_trustlist_start' operation, the next trust item
+ was received from the crypto engine. The accompanying
+ TYPE_DATA is a `gpgme_trust_item_t' variable that contains
+ the trust item with one reference for the user.
+
+ -- Data type: void (*gpgme_event_io_cb_t) (void *DATA,
+gpgme_event_io_t TYPE, void *TYPE_DATA)
+ The `gpgme_event_io_cb_t' type is the type of functions which can
+ be called by GPGME to signal an event for an operation running in
+ a context which has I/O callback functions registered by the user.
+
+ DATA was provided by the user when registering the
+ `gpgme_event_io_cb_t' function with GPGME and will always be
+ passed as the first argument when registering a callback function.
+ For example, the user can use this to determine the context in
+ which this event has occured.
+
+ TYPE will specify the type of event that has occured. TYPE_DATA
+ specifies the event further, as described in the above list of
+ possible `gpgme_event_io_t' types.
+
+ GPGME can call this function in an I/O callback handler.
+
+
+File: gpgme.info, Node: Registering I/O Callbacks, Next: I/O Callback Example, Prev: I/O Callback Interface, Up: Using External Event Loops
+
+7.8.2.2 Registering I/O Callbacks
+.................................
+
+ -- Data type: struct gpgme_io_cb_ts
+ This structure is used to store the I/O callback interface
+ functions described in the previous section. It has the following
+ members:
+
+ `gpgme_register_io_cb_t add'
+ This is the function called by GPGME to register an I/O
+ callback handler. It must be specified.
+
+ `void *add_data'
+ This is passed as the first argument to the `add' function
+ when it is called by GPGME. For example, it can be used to
+ determine the event loop to which the file descriptor should
+ be added.
+
+ `gpgme_remove_io_cb_t remove'
+ This is the function called by GPGME to remove an I/O
+ callback handler. It must be specified.
+
+ `gpgme_event_io_cb_t event'
+ This is the function called by GPGME to signal an event for
+ an operation. It must be specified, because at least the
+ start event must be processed.
+
+ `void *event_data'
+ This is passed as the first argument to the `event' function
+ when it is called by GPGME. For example, it can be used to
+ determine the context in which the event has occured.
+
+ -- Function: void gpgme_set_io_cbs (gpgme_ctx_t CTX,
+ struct gpgme_io_cb_ts *IO_CBS)
+ The function `gpgme_set_io_cbs' enables the I/O callback interface
+ for the context CTX. The I/O callback functions are specified by
+ IO_CBS.
+
+ If IO_CBS->`add' is `NULL', the I/O callback interface is disabled
+ for the context, and normal operation is restored.
+
+ -- Function: void gpgme_get_io_cbs (gpgme_ctx_t CTX,
+ struct gpgme_io_cb_ts *IO_CBS)
+ The function `gpgme_get_io_cbs' returns the I/O callback functions
+ set with `gpgme_set_io_cbs' in IO_CBS.
+
+
+File: gpgme.info, Node: I/O Callback Example, Next: I/O Callback Example GTK+, Prev: Registering I/O Callbacks, Up: Using External Event Loops
+
+7.8.2.3 I/O Callback Example
+............................
+
+To actually use an external event loop, you have to implement the I/O
+callback functions that are used by GPGME to register and unregister
+file descriptors. Furthermore, you have to actually monitor these file
+descriptors for activity and call the appropriate I/O callbacks.
+
+ The following example illustrates how to do that. The example uses
+locking to show in which way the callbacks and the event loop can run
+concurrently. For the event loop, we use a fixed array. For a
+real-world implementation, you should use a dynamically sized structure
+because the number of file descriptors needed for a crypto operation in
+GPGME is not predictable.
+
+ #include <assert.h>
+ #include <errno.h>
+ #include <stdlib.h>
+ #include <pthread.h>
+ #include <sys/types.h>
+ #include <gpgme.h>
+
+ /* The following structure holds the result of a crypto operation. */
+ struct op_result
+ {
+ int done;
+ gpgme_error_t err;
+ };
+
+ /* The following structure holds the data associated with one I/O
+ callback. */
+ struct one_fd
+ {
+ int fd;
+ int dir;
+ gpgme_io_cb_t fnc;
+ void *fnc_data;
+ void *loop;
+ };
+
+ struct event_loop
+ {
+ pthread_mutex_t lock;
+ #define MAX_FDS 32
+ /* Unused slots are marked with FD being -1. */
+ struct one_fd fds[MAX_FDS];
+ };
+
+ The following functions implement the I/O callback interface.
+
+ gpgme_error_t
+ add_io_cb (void *data, int fd, int dir, gpgme_io_cb_t fnc, void *fnc_data,
+ void **r_tag)
+ {
+ struct event_loop *loop = data;
+ struct one_fd *fds = loop->fds;
+ int i;
+
+ pthread_mutex_lock (&loop->lock);
+ for (i = 0; i < MAX_FDS; i++)
+ {
+ if (fds[i].fd == -1)
+ {
+ fds[i].fd = fd;
+ fds[i].dir = dir;
+ fds[i].fnc = fnc;
+ fds[i].fnc_data = fnc_data;
+ fds[i].loop = loop;
+ break;
+ }
+ }
+ pthread_mutex_unlock (&loop->lock);
+ if (i == MAX_FDS)
+ return gpg_error (GPG_ERR_GENERAL);
+ *r_tag = &fds[i];
+ return 0;
+ }
+
+ void
+ remove_io_cb (void *tag)
+ {
+ struct one_fd *fd = tag;
+ struct event_loop *loop = fd->loop;
+
+ pthread_mutex_lock (&loop->lock);
+ fd->fd = -1;
+ pthread_mutex_unlock (&loop->lock);
+ }
+
+ void
+ event_io_cb (void *data, gpgme_event_io_t type, void *type_data)
+ {
+ struct op_result *result = data;
+
+ /* We don't support list operations here. */
+ if (type == GPGME_EVENT_DONE)
+ {
+ result->done = 1;
+ result->err = *type_data;
+ }
+ }
+
+ The final missing piece is the event loop, which will be presented
+next. We only support waiting for the success of a single operation.
+
+ int
+ do_select (struct event_loop *loop)
+ {
+ fd_set rfds;
+ fd_set wfds;
+ int i, n;
+ int any = 0;
+ struct one_fd *fdlist = loop->fds;
+
+ pthread_mutex_lock (&loop->lock);
+ FD_ZERO (&rfds);
+ FD_ZERO (&wfds);
+ for (i = 0; i < MAX_FDS; i++)
+ if (fdlist[i].fd != -1)
+ FD_SET (fdlist[i].fd, fdlist[i].dir ? &rfds : &wfds);
+ pthread_mutex_unlock (&loop->unlock);
+
+ do
+ {
+ n = select (FD_SETSIZE, &rfds, &wfds, NULL, 0);
+ }
+ while (n < 0 && errno == EINTR);
+
+ if (n < 0)
+ return n; /* Error or timeout. */
+
+ pthread_mutex_lock (&loop->lock);
+ for (i = 0; i < MAX_FDS && n; i++)
+ {
+ if (fdlist[i].fd != -1)
+ {
+ if (FD_ISSET (fdlist[i].fd, fdlist[i].dir ? &rfds : &wfds))
+ {
+ assert (n);
+ n--;
+ any = 1;
+ /* The I/O callback handler can register/remove callbacks,
+ so we have to unlock the file descriptor list. */
+ pthread_mutex_unlock (&loop->lock);
+ (*fdlist[i].fnc) (fdlist[i].fnc_data, fdlist[i].fd);
+ pthread_mutex_lock (&loop->lock);
+ }
+ }
+ }
+ pthread_mutex_unlock (&loop->lock);
+ return any;
+ }
+
+ void
+ wait_for_op (struct event_loop *loop, struct op_result *result)
+ {
+ int ret;
+
+ do
+ {
+ ret = do_select (loop);
+ }
+ while (ret >= 0 && !result->done);
+ }
+
+ The main function shows how to put it all together.
+
+ int
+ main (int argc, char *argv[])
+ {
+ struct event_loop loop;
+ struct op_result result;
+ gpgme_ctx_t ctx;
+ gpgme_error_t err;
+ gpgme_data_t sig, text;
+ int i;
+ struct gpgme_io_cb_ts io_cbs =
+ {
+ add_io_cb,
+ &loop,
+ remove_io_cb,
+ event_io_cb,
+ &result
+ };
+
+ init_gpgme (void);
+
+ /* Initialize the loop structure. */
+ pthread_mutex_init (&loop.lock, NULL);
+ for (i = 0; i < MAX_FDS; i++)
+ loop->fds[i].fd = -1;
+
+ /* Initialize the result structure. */
+ result.done = 0;
+
+ err = gpgme_data_new_from_file (&sig, "signature", 1);
+ if (!err)
+ err = gpgme_data_new_from_file (&text, "text", 1);
+ if (!err)
+ err = gpgme_new (&ctx);
+ if (!err)
+ {
+ gpgme_set_io_cbs (ctx, &io_cbs);
+ err = gpgme_op_verify_start (ctx, sig, text, NULL);
+ }
+ if (err)
+ {
+ fprintf (stderr, "gpgme error: %s: %s\n",
+ gpgme_strsource (err), gpgme_strerror (err));
+ exit (1);
+ }
+
+ wait_for_op (&loop, &result);
+ if (!result.done)
+ {
+ fprintf (stderr, "select error\n");
+ exit (1);
+ }
+ if (!result.err)
+ {
+ fprintf (stderr, "verification failed: %s: %s\n",
+ gpgme_strsource (result.err), gpgme_strerror (result.err));
+ exit (1);
+ }
+ /* Evaluate verify result. */
+ ...
+ return 0;
+ }
+
+
+File: gpgme.info, Node: I/O Callback Example GTK+, Next: I/O Callback Example GDK, Prev: I/O Callback Example, Up: Using External Event Loops
+
+7.8.2.4 I/O Callback Example GTK+
+.................................
+
+The I/O callback interface can be used to integrate GPGME with the GTK+
+event loop. The following code snippets shows how this can be done
+using the appropriate register and remove I/O callback functions. In
+this example, the private data of the register I/O callback function is
+unused. The event notifications is missing because it does not require
+any GTK+ specific setup.
+
+ #include <gtk/gtk.h>
+
+ struct my_gpgme_io_cb
+ {
+ gpgme_io_cb_t fnc;
+ void *fnc_data;
+ guint input_handler_id
+ };
+
+ void
+ my_gpgme_io_cb (gpointer data, gint source, GdkInputCondition condition)
+ {
+ struct my_gpgme_io_cb *iocb = data;
+ (*(iocb->fnc)) (iocb->data, source);
+ }
+
+ void
+ my_gpgme_remove_io_cb (void *data)
+ {
+ struct my_gpgme_io_cb *iocb = data;
+ gtk_input_remove (data->input_handler_id);
+ }
+
+ void
+ my_gpgme_register_io_callback (void *data, int fd, int dir, gpgme_io_cb_t fnc,
+ void *fnc_data, void **tag)
+ {
+ struct my_gpgme_io_cb *iocb = g_malloc (sizeof (struct my_gpgme_io_cb));
+ iocb->fnc = fnc;
+ iocb->data = fnc_data;
+ iocb->input_handler_id = gtk_input_add_full (fd, dir
+ ? GDK_INPUT_READ
+ : GDK_INPUT_WRITE,
+ my_gpgme_io_callback,
+ 0, iocb, NULL);
+ *tag = iocb;
+ return 0;
+ }
+
+
+File: gpgme.info, Node: I/O Callback Example GDK, Next: I/O Callback Example Qt, Prev: I/O Callback Example GTK+, Up: Using External Event Loops
+
+7.8.2.5 I/O Callback Example GDK
+................................
+
+The I/O callback interface can also be used to integrate GPGME with the
+GDK event loop. The following code snippets shows how this can be done
+using the appropriate register and remove I/O callback functions. In
+this example, the private data of the register I/O callback function is
+unused. The event notifications is missing because it does not require
+any GDK specific setup.
+
+ It is very similar to the GTK+ example in the previous section.
+
+ #include <gdk/gdk.h>
+
+ struct my_gpgme_io_cb
+ {
+ gpgme_io_cb_t fnc;
+ void *fnc_data;
+ gint tag;
+ };
+
+ void
+ my_gpgme_io_cb (gpointer data, gint source, GdkInputCondition condition)
+ {
+ struct my_gpgme_io_cb *iocb = data;
+ (*(iocb->fnc)) (iocb->data, source);
+ }
+
+ void
+ my_gpgme_remove_io_cb (void *data)
+ {
+ struct my_gpgme_io_cb *iocb = data;
+ gdk_input_remove (data->tag);
+ }
+
+ void
+ my_gpgme_register_io_callback (void *data, int fd, int dir, gpgme_io_cb_t fnc,
+ void *fnc_data, void **tag)
+ {
+ struct my_gpgme_io_cb *iocb = g_malloc (sizeof (struct my_gpgme_io_cb));
+ iocb->fnc = fnc;
+ iocb->data = fnc_data;
+ iocb->tag = gtk_input_add_full (fd, dir ? GDK_INPUT_READ : GDK_INPUT_WRITE,
+ my_gpgme_io_callback, iocb, NULL);
+ *tag = iocb;
+ return 0;
+ }
+
+
+File: gpgme.info, Node: I/O Callback Example Qt, Prev: I/O Callback Example GDK, Up: Using External Event Loops
+
+7.8.2.6 I/O Callback Example Qt
+...............................
+
+The I/O callback interface can also be used to integrate GPGME with the
+Qt event loop. The following code snippets show how this can be done
+using the appropriate register and remove I/O callback functions. In
+this example, the private data of the register I/O callback function is
+unused. The event notifications is missing because it does not require
+any Qt specific setup.
+
+ #include <qsocketnotifier.h>
+ #include <qapplication.h>
+
+ struct IOCB {
+ IOCB( GpgmeIOCb f, void * d, QSocketNotifier * n )
+ : func( f ), data( d ), notifier( n ) {}
+ GpgmeIOCb func;
+ void * data;
+ QSocketNotifier * notifier;
+ }
+
+ class MyApp : public QApplication {
+
+ // ...
+
+ static void registerGpgmeIOCallback( void * data, int fd, int dir,
+ GpgmeIOCb func, void * func_data,
+ void ** tag ) {
+ QSocketNotifier * n =
+ new QSocketNotifier( fd, dir ? QSocketNotifier::Read
+ : QSocketNotifier::Write );
+ connect( n, SIGNAL(activated(int)),
+ qApp, SLOT(slotGpgmeIOCallback(int)) );
+ qApp->mIOCBs.push_back( IOCB( func, func_data, n ) );
+ *tag = (void*)n;
+ }
+
+ static void removeGpgmeIOCallback( void * tag ) {
+ if ( !tag ) return;
+ QSocketNotifier * n = static_cast<QSocketNotifier*>( tag );
+ for ( QValueList<IOCB>::iterator it = qApp->mIOCBs.begin() ;
+ it != qApp->mIOCBs.end() ; ++it )
+ if ( it->notifier == n ) {
+ delete it->notifier;
+ qApp->mIOCBs.erase( it );
+ return;
+ }
+ }
+
+ public slots:
+ void slotGpgmeIOCallback( int fd ) {
+ for ( QValueList<IOCB>::const_iterator it = mIOCBs.begin() ;
+ it != mIOCBs.end() ; ++it )
+ if ( it->notifier && it->notifier->socket() == fd )
+ (*(it->func)) ( it->func_data, fd );
+ }
+
+ // ...
+
+ private:
+ QValueList<IOCB> mIOCBs;
+ // ...
+ };
+
+
+File: gpgme.info, Node: Cancellation, Prev: Using External Event Loops, Up: Run Control
+
+7.8.3 Cancellation
+------------------
+
+Sometimes you do not want to wait for an operation to finish. GPGME
+provides two different functions to achieve that. The function
+`gpgme_cancel' takes effect immediately. When it returns, the
+operation is effectively canceled. However, it has some limitations
+and can not be used with synchronous operations. In contrast, the
+function `gpgme_cancel_async' can be used with any context and from any
+thread, but it is not guaranteed to take effect immediately. Instead,
+cancellation occurs at the next possible time (typically the next time
+I/O occurs in the target context).
+
+ -- Function: gpgme_ctx_t gpgme_cancel (gpgme_ctx_t CTX)
+ The function `gpgme_cancel' attempts to cancel a pending operation
+ in the context CTX. This only works if you use the global event
+ loop or your own event loop.
+
+ If you use the global event loop, you must not call `gpgme_wait'
+ or `gpgme_wait' during cancellation. After successful
+ cancellation, you can call `gpgme_wait' (optionally waiting on
+ CTX), and the context CTX will appear as if it had finished with
+ the error code `GPG_ERR_CANCEL'.
+
+ If you use your an external event loop, you must ensure that no I/O
+ callbacks are invoked for this context (for example by halting the
+ event loop). On successful cancellation, all registered I/O
+ callbacks for this context will be unregistered, and a
+ `GPGME_EVENT_DONE' event with the error code `GPG_ERR_CANCEL' will
+ be signaled.
+
+ The function returns an error code if the cancellation failed (in
+ this case the state of CTX is not modified).
+
+ -- Function: gpgme_ctx_t gpgme_cancel_async (gpgme_ctx_t CTX)
+ The function `gpgme_cancel' attempts to cancel a pending operation
+ in the context CTX. This can be called by any thread at any time
+ after starting an operation on the context, but will not take
+ effect immediately. The actual cancellation happens at the next
+ time GPGME processes I/O in that context.
+
+ The function returns an error code if the cancellation failed (in
+ this case the state of CTX is not modified).
+
+
+File: gpgme.info, Node: UI Server Protocol, Next: Library Copying, Prev: Contexts, Up: Top
+
+Appendix A The GnuPG UI Server Protocol
+***************************************
+
+This section specifies the protocol used between clients and a User
+Interface Server (UI server). This protocol helps to build a system
+where all cryptographic operations are done by a server and the server
+is responsible for all dialogs. Although GPGME has no direct support
+for this protocol it is believed that servers will utilize the GPGME
+library; thus having the specification included in this manual is an
+appropriate choice. This protocol should be referenced as `The GnuPG
+UI Server Protocol'.
+
+A server needs to implement these commands:(1)
+
+* Menu:
+
+* UI Server Encrypt:: Encrypt a message.
+* UI Server Sign:: Sign a message.
+* UI Server Decrypt:: Decrypt a message.
+* UI Server Verify:: Verify a message.
+* UI Server Set Input Files:: Specifying the input files to operate on.
+* UI Server Sign/Encrypt Files:: Encrypting and signing files.
+* UI Server Verify/Decrypt Files:: Decrypting and verifying files.
+* UI Server Import/Export Keys:: Managing certificates.
+* UI Server Checksum Files:: Create and verify checksums for files.
+* Miscellaneous UI Server Commands:: Commands not related to a specific operation.
+
+ ---------- Footnotes ----------
+
+ (1) In all examples we assume that the connection has already been
+established; see the Assuan manual for details.
+
+
+File: gpgme.info, Node: UI Server Encrypt, Next: UI Server Sign, Up: UI Server Protocol
+
+A.1 UI Server: Encrypt a Message
+================================
+
+Before encryption can be done the recipients must be set using the
+command:
+
+ -- Command: RECIPIENT STRING
+ Set the recipient for the encryption. STRING is an RFC-2822
+ recipient name ("mailbox" as per section 3.4). This command may
+ or may not check the recipient for validity right away; if it does
+ not all recipients are expected to be checked at the time of the
+ `ENCRYPT' command. All `RECIPIENT' commands are cumulative until a
+ successful `ENCRYPT' command or until a `RESET' command.
+ Linefeeds are obviously not allowed in STRING and should be folded
+ into spaces (which are equivalent).
+
+To tell the server the source and destination of the data, the next two
+commands are to be used:
+
+ -- Command: INPUT FD=N
+ Set the file descriptor for the message to be encrypted to N. The
+ message send to the server is binary encoded.
+
+ GpgOL is a Windows only program, thus N is not a libc file
+ descriptor but a regular system handle. Given that the Assuan
+ connection works over a socket, it is not possible to use regular
+ inheritance to make the file descriptor available to the server.
+ Thus `DuplicateHandle' needs to be used to duplicate a handle to
+ the server process. This is the reason that the server needs to
+ implement the `GETINFO pid' command. Sending this command a second
+ time replaces the file descriptor set by the last one.
+
+ -- Command: OUTPUT FD=N
+ Set the file descriptor to be used for the output (i.e. the
+ encrypted message) to N. For OpenPGP, the output needs to be
+ ASCII armored; for CMS, the output needs to be Base-64 encoded.
+ For details on the file descriptor, see the `INPUT' command.
+
+The setting of the recipients, the data source and destination may
+happen in any order, even intermixed. If this has been done the actual
+encryption operation is called using:
+
+ -- Command: ENCRYPT --protocol=NAME
+ This command reads the plaintext from the file descriptor set by
+ the `INPUT' command, encrypts it and writes the ciphertext to the
+ file descriptor set by the `OUTPUT' command. The server may (and
+ should) overlap reading and writing. The recipients used for the
+ encryption are all the recipients set so far. If any recipient is
+ not usable the server should take appropriate measures to notify
+ the user about the problem and may cancel the operation by
+ returning an error code. The used file descriptors are void after
+ this command; the recipient list is only cleared if the server
+ returns success.
+
+ Because GpgOL uses a streaming mode of operation the server is not
+ allowed to auto select the protocol and must obey to the mandatory
+ PROTOCOL parameter:
+
+ `OpenPGP'
+ Use the OpenPGP protocol (RFC-2440).
+
+ `CMS'
+ Use the CMS (PKCS#7) protocol (RFC-3852).
+
+
+ To support automagically selection of the protocol depending on the
+selected keys, the server MAY implement the command:
+
+ -- Command: PREP_ENCRYPT [--protocol=NAME] [--expect-sign]
+ This commands considers all recipients set so far and decides
+ whether it is able to take input and start the actual encryption.
+ This is kind of a dry-run `ENCRYPT' without requiring or using the
+ input and output file descriptors. The server shall cache the
+ result of any user selection to avoid asking this again when the
+ actual `ENCRYPT' command is send. The `--protocol' option is
+ optional; if it is not given, the server should allow the user to
+ select the protocol to be used based on the recipients given or by
+ any other means.
+
+ If `--expect-sign' is given the server should expect that the
+ message will also be signed and use this hint to present a unified
+ recipient and signer selection dialog if possible and desired. A
+ selected signer should then be cached for the expected SIGN command
+ (which is expected in the same session but possible on another
+ connection).
+
+ If this command is given again before a successful `ENCRYPT'
+ command, the second one takes effect.
+
+ Before sending the OK response the server shall tell the client the
+ protocol to be used (either the one given by the argument or the
+ one selected by the user) by means of a status line:
+
+ -- Status line: PROTOCOL NAME
+ Advise the client to use the protocol NAME for the `ENCRYPT'
+ command. The valid protocol names are listed under the
+ description of the `ENCRYPT' command. The server shall emit
+ exactly one PROTOCOL status line.
+
+Here is an example of a complete encryption sequence; client lines are
+indicated by a C:, server responses by C::
+
+ C: RESET
+ S: OK
+ C: RECIPIENT foo@example.net
+ S: OK
+ C: RECIPIENT bar@example.com
+ S: OK
+ C: PREP_ENCRYPT
+ S: S PROTOCOL OpenPGP
+ S: OK
+ C: INPUT FD=17
+ S: OK
+ C: OUTPUT FD=18
+ S: OK
+ C: ENCRYPT
+ S: OK
+
+
+File: gpgme.info, Node: UI Server Sign, Next: UI Server Decrypt, Prev: UI Server Encrypt, Up: UI Server Protocol
+
+A.2 UI Server: Sign a Message
+=============================
+
+The server needs to implement opaque signing as well as detached
+signing. Due to the nature of OpenPGP messages it is always required to
+send the entire message to the server; sending just the hash is not
+possible. The following two commands are required to set the input and
+output file descriptors:
+
+ -- Command: INPUT FD=N
+ Set the file descriptor for the message to be signed to N. The
+ message send to the server is binary encoded. For details on the
+ file descriptor, see the description of `INPUT' in the `ENCRYPT'
+ section.
+
+ -- Command: OUTPUT FD=N
+ Set the file descriptor to be used for the output. The output is
+ either the complete signed message or in case of a detached
+ signature just that detached signature. For OpenPGP, the output
+ needs to be ASCII armored; for CMS, the output needs to be Base-64
+ encoded. For details on the file descriptor, see the `INPUT'
+ command.
+
+To allow the server the selection of a non-default signing key the
+client may optionally use the `SENDER' command, see *note command
+SENDER::.
+
+The signing operation is then initiated by:
+
+ -- Command: SIGN --protocol=NAME [--detached]
+ Sign the data set with the `INPUT' command and write it to the sink
+ set by OUTPUT. NAME is the signing protocol used for the message.
+ For a description of the allowed protocols see the `ENCRYPT'
+ command. With option `--detached' given, a detached signature is
+ created; this is actually the usual way the command is used.
+
+The client expects the server to send at least this status information
+before the final OK response:
+
+ -- Status line: MICALG STRING
+ The STRING represents the hash algorithm used to create the
+ signature. It is used with MOSS style signature messages and
+ defined by PGP/MIME (RFC-3156) and S/MIME (RFC-3851). The GPGME
+ library has a supporting function `gpgme_hash_algo_name' to return
+ the algorithm name as a string. This string needs to be
+ lowercased and for OpenPGP prefixed with "`pgp-'".
+
+
+File: gpgme.info, Node: UI Server Decrypt, Next: UI Server Verify, Prev: UI Server Sign, Up: UI Server Protocol
+
+A.3 UI Server: Decrypt a Message
+================================
+
+Decryption may include the verification of OpenPGP messages. This is
+due to the often used combined signing/encryption modus of OpenPGP. The
+client may pass an option to the server to inhibit the signature
+verification. The following two commands are required to set the input
+and output file descriptors:
+
+ -- Command: INPUT FD=N
+ Set the file descriptor for the message to be decrypted to N. The
+ message send to the server is either binary encoded or -- in the
+ case of OpenPGP -- ASCII armored. For details on the file
+ descriptor, see the description of `INPUT' in the `ENCRYPT'
+ section.
+
+ -- Command: OUTPUT FD=N
+ Set the file descriptor to be used for the output. The output is
+ binary encoded. For details on the file descriptor, see the
+ description of `INPUT' in the `ENCRYPT' section.
+
+The decryption is started with the command:
+
+ -- Command: DECRYPT --protocol=NAME [--no-verify]
+ NAME is the encryption protocol used for the message. For a
+ description of the allowed protocols see the `ENCRYPT' command.
+ This argument is mandatory. If the option `--no-verify' is given,
+ the server should not try to verify a signature, in case the input
+ data is an OpenPGP combined message.
+
+
+File: gpgme.info, Node: UI Server Verify, Next: UI Server Set Input Files, Prev: UI Server Decrypt, Up: UI Server Protocol
+
+A.4 UI Server: Verify a Message
+===============================
+
+The server needs to support the verification of opaque signatures as
+well as detached signatures. The kind of input sources controls what
+kind message is to be verified.
+
+ -- Command: MESSAGE FD=N
+ This command is used with detached signatures to set the file
+ descriptor for the signed data to N. The data is binary encoded
+ (used verbatim). For details on the file descriptor, see the
+ description of `INPUT' in the `ENCRYPT' section.
+
+ -- Command: INPUT FD=N
+ Set the file descriptor for the opaque message or the signature
+ part of a detached signature to N. The message send to the server
+ is either binary encoded or - in the case of OpenPGP - ASCII
+ armored. For details on the file descriptor, see the description
+ of `INPUT' in the `ENCRYPT' section.
+
+ -- Command: OUTPUT FD=N
+ Set the file descriptor to be used for the output. The output is
+ binary encoded and only used for opaque signatures. For details
+ on the file descriptor, see the description of `INPUT' in the
+ `ENCRYPT' section.
+
+The verification is then started using:
+
+ -- Command: VERIFY --protocol=NAME [--silent]
+ NAME is the signing protocol used for the message. For a
+ description of the allowed protocols see the `ENCRYPT' command.
+ This argument is mandatory. Depending on the combination of
+ `MESSAGE' `INPUT' and `OUTPUT' commands, the server needs to
+ select the appropriate verification mode:
+
+ MESSAGE and INPUT
+ This indicates a detached signature. Output data is not
+ applicable.
+
+ INPUT
+ This indicates an opaque signature. As no output command has
+ been given, the server is only required to check the
+ signature.
+
+ INPUT and OUTPUT
+ This indicates an opaque signature. The server shall write
+ the signed data to the file descriptor set by the output
+ command. This data shall even be written if the signatures
+ can't be verified.
+
+ With `--silent' the server shall not display any dialog; this is for
+example used by the client to get the content of opaque signed
+messages. The client expects the server to send at least this status
+information before the final OK response:
+
+ -- Status line: SIGSTATUS FLAG DISPLAYSTRING
+ Returns the status for the signature and a short string explaining
+ the status. Valid values for FLAG are:
+
+ `none'
+ The message has a signature but it could not not be verified
+ due to a missing key.
+
+ `green'
+ The signature is fully valid.
+
+ `yellow'
+ The signature is valid but additional information was shown
+ regarding the validity of the key.
+
+ `red'
+ The signature is not valid.
+
+ DISPLAYSTRING is a percent-and-plus-encoded string with a short
+ human readable description of the status. For example
+
+ S SIGSTATUS green Good+signature+from+Keith+Moon+<keith@example.net>
+
+ Note that this string needs to fit into an Assuan line and should
+ be short enough to be displayed as short one-liner on the clients
+ window. As usual the encoding of this string is UTF-8 and it
+ should be send in its translated form.
+
+ The server shall send one status line for every signature found on
+ the message.
+
+
+
+File: gpgme.info, Node: UI Server Set Input Files, Next: UI Server Sign/Encrypt Files, Prev: UI Server Verify, Up: UI Server Protocol
+
+A.5 UI Server: Specifying the input files to operate on.
+========================================================
+
+All file related UI server commands operate on a number of input files
+or directories, specified by one or more `FILE' commands:
+
+ -- Command: FILE NAME [-continued]
+ Add the file or directory NAME to the list of pathnames to be
+ processed by the server. The parameter NAME must be an absolute
+ path name (including the drive letter) and is percent espaced (in
+ particular, the characters %, = and white space characters are
+ always escaped). The option `--continued' is present for all but
+ the last `FILE' command.
+
+
+File: gpgme.info, Node: UI Server Sign/Encrypt Files, Next: UI Server Verify/Decrypt Files, Prev: UI Server Set Input Files, Up: UI Server Protocol
+
+A.6 UI Server: Encrypting and signing files.
+============================================
+
+First, the input files need to be specified by one or more `FILE'
+commands. Afterwards, the actual operation is requested:
+
+ -- Command: ENCRYPT_FILES -nohup
+ -- Command: SIGN_FILES -nohup
+ -- Command: ENCRYPT_SIGN_FILES -nohup
+ Request that the files specified by `FILE' are encrypted and/or
+ signed. The command selects the default action. The UI server may
+ allow the user to change this default afterwards interactively, and
+ even abort the operation or complete it only on some of the
+ selected files and directories.
+
+ What it means to encrypt or sign a file or directory is specific to
+ the preferences of the user, the functionality the UI server
+ provides, and the selected protocol. Typically, for each input
+ file a new file is created under the original filename plus a
+ protocol specific extension (like `.gpg' or `.sig'), which contain
+ the encrypted/signed file or a detached signature. For
+ directories, the server may offer multiple options to the user
+ (for example ignore or process recursively).
+
+ The `ENCRYPT_SIGN_FILES' command requests a combined sign and
+ encrypt operation. It may not be available for all protocols (for
+ example, it is available for OpenPGP but not for CMS).
+
+ The option `--nohup' is mandatory. It is currently unspecified
+ what should happen if `--nohup' is not present. Because `--nohup'
+ is present, the server always returns `OK' promptly, and completes
+ the operation asynchronously.
+
+
+File: gpgme.info, Node: UI Server Verify/Decrypt Files, Next: UI Server Import/Export Keys, Prev: UI Server Sign/Encrypt Files, Up: UI Server Protocol
+
+A.7 UI Server: Decrypting and verifying files.
+==============================================
+
+First, the input files need to be specified by one or more `FILE'
+commands. Afterwards, the actual operation is requested:
+
+ -- Command: DECRYPT_FILES -nohup
+ -- Command: VERIFY_FILES -nohup
+ -- Command: DECRYPT_VERIFY_FILES -nohup
+ Request that the files specified by `FILE' are decrypted and/or
+ verified. The command selects the default action. The UI server
+ may allow the user to change this default afterwards
+ interactively, and even abort the operation or complete it only on
+ some of the selected files and directories.
+
+ What it means to decrypt or verify a file or directory is specific
+ to the preferences of the user, the functionality the UI server
+ provides, and the selected protocol. Typically, for decryption, a
+ new file is created for each input file under the original
+ filename minus a protocol specific extension (like `.gpg') which
+ contains the original plaintext. For verification a status is
+ displayed for each signed input file, indicating if it is signed,
+ and if yes, if the signature is valid. For files that are signed
+ and encrypted, the `VERIFY' command transiently decrypts the file
+ to verify the enclosed signature. For directories, the server may
+ offer multiple options to the user (for example ignore or process
+ recursively).
+
+ The option `--nohup' is mandatory. It is currently unspecified
+ what should happen if `--nohup' is not present. Because `--nohup'
+ is present, the server always returns `OK' promptly, and completes
+ the operation asynchronously.
+
+
+File: gpgme.info, Node: UI Server Import/Export Keys, Next: UI Server Checksum Files, Prev: UI Server Verify/Decrypt Files, Up: UI Server Protocol
+
+A.8 UI Server: Managing certificates.
+=====================================
+
+First, the input files need to be specified by one or more `FILE'
+commands. Afterwards, the actual operation is requested:
+
+ -- Command: IMPORT_FILES -nohup
+ Request that the certificates contained in the files specified by
+ `FILE' are imported into the local certificate databases.
+
+ For directories, the server may offer multiple options to the user
+ (for example ignore or process recursively).
+
+ The option `--nohup' is mandatory. It is currently unspecified
+ what should happen if `--nohup' is not present. Because `--nohup'
+ is present, the server always returns `OK' promptly, and completes
+ the operation asynchronously.
+
+ FIXME: It may be nice to support an `EXPORT' command as well, which
+is enabled by the context menu of the background of a directory.
+
+
+File: gpgme.info, Node: UI Server Checksum Files, Next: Miscellaneous UI Server Commands, Prev: UI Server Import/Export Keys, Up: UI Server Protocol
+
+A.9 UI Server: Create and verify checksums for files.
+=====================================================
+
+First, the input files need to be specified by one or more `FILE'
+commands. Afterwards, the actual operation is requested:
+
+ -- Command: CHECKSUM_CREATE_FILES -nohup
+ Request that checksums are created for the files specifed by
+ `FILE'. The choice of checksum algorithm and the destination
+ storage and format for the created checksums depend on the
+ preferences of the user and the functionality provided by the UI
+ server. For directories, the server may offer multiple options to
+ the user (for example ignore or process recursively).
+
+ The option `--nohup' is mandatory. It is currently unspecified
+ what should happen if `--nohup' is not present. Because `--nohup'
+ is present, the server always returns `OK' promptly, and completes
+ the operation asynchronously.
+
+ -- Command: CHECKSUM_VERIFY_FILES -nohup
+ Request that checksums are created for the files specifed by
+ `FILE' and verified against previously created and stored
+ checksums. The choice of checksum algorithm and the source storage
+ and format for previously created checksums depend on the
+ preferences of the user and the functionality provided by the UI
+ server. For directories, the server may offer multiple options to
+ the user (for example ignore or process recursively).
+
+ If the source storage of previously created checksums is available
+ to the user through the Windows shell, this command may also
+ accept such checksum files as `FILE' arguments. In this case, the
+ UI server should instead verify the checksum of the referenced
+ files as if they were given as INPUT files.
+
+ The option `--nohup' is mandatory. It is currently unspecified
+ what should happen if `--nohup' is not present. Because `--nohup'
+ is present, the server always returns `OK' promptly, and completes
+ the operation asynchronously.
+
+
+File: gpgme.info, Node: Miscellaneous UI Server Commands, Prev: UI Server Checksum Files, Up: UI Server Protocol
+
+A.10 Miscellaneous UI Server Commands
+=====================================
+
+The server needs to implement the following commands which are not
+related to a specific command:
+
+ -- Command: GETINFO WHAT
+ This is a multi purpose command, commonly used to return a variety
+ of information. The required subcommands as described by the WHAT
+ parameter are:
+
+ `pid'
+ Return the process id of the server in decimal notation using
+ an Assuan data line.
+
+To allow the server to pop up the windows in the correct relation to the
+client, the client is advised to tell the server by sending the option:
+
+ -- Command option: window-id NUMBER
+ The NUMBER represents the native window ID of the clients current
+ window. On Windows systems this is a windows handle (`HWND') and
+ on X11 systems it is the `X Window ID'. The number needs to be
+ given as a hexadecimal value so that it is easier to convey pointer
+ values (e.g. `HWND').
+
+A client may want to fire up the certificate manager of the server. To
+do this it uses the Assuan command:
+
+ -- Command: START_KEYMANAGER
+ The server shall pop up the main window of the key manager (aka
+ certificate manager). The client expects that the key manager is
+ brought into the foregound and that this command immediatley
+ returns (does not wait until the key manager has been fully
+ brought up).
+
+A client may want to fire up the configuration dialog of the server. To
+do this it uses the Assuan command:
+
+ -- Command: START_CONFDIALOG
+ The server shall pop up its configuration dialog. The client
+ expects that this dialog is brought into the foregound and that
+ this command immediatley returns (i.e. it does not wait until the
+ dialog has been fully brought up).
+
+When doing an operation on a mail, it is useful to let the server know
+the address of the sender:
+
+ -- Command: SENDER [--info] [--protocol=NAME] EMAIL
+ EMAIL is the plain ASCII encoded address ("addr-spec" as per
+ RFC-2822) enclosed in angle brackets. The address set with this
+ command is valid until a successful completion of the operation or
+ until a `RESET' command. A second command overrides the effect of
+ the first one; if EMAIL is not given and `--info' is not used, the
+ server shall use the default signing key.
+
+ If option `--info' is not given, the server shall also suggest a
+ protocol to use for signing. The client may use this suggested
+ protocol on its own discretion. The same status line as with
+ PREP_ENCRYPT is used for this.
+
+ The option `--protocol' may be used to give the server a hint on
+ which signing protocol should be preferred.
+
+To allow the UI-server to visually identify a running operation or to
+associate operations the server MAY support the command:
+
+ -- Command: SESSION NUMBER [STRING]
+ The NUMBER is an arbitrary value, a server may use to associate
+ simultaneous running sessions. It is a 32 bit unsigned integer
+ with `0' as a special value indicating that no session association
+ shall be done.
+
+ If STRING is given, the server may use this as the title of a
+ window or, in the case of an email operation, to extract the
+ sender's address. The string may contain spaces; thus no
+ plus-escaping is used.
+
+ This command may be used at any time and overrides the effect of
+ the last command. A `RESET' undoes the effect of this command.
+
+
+
+File: gpgme.info, Node: Library Copying, Next: Copying, Prev: UI Server Protocol, Up: Top
+
+GNU Lesser General Public License
+*********************************
+
+ Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ [This is the first released version of the Lesser GPL. It also counts
+ as the successor of the GNU Library Public License, version 2, hence the
+ version number 2.1.]
+
+Preamble
+========
+
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diff --git a/doc/gpgme.info-2 b/doc/gpgme.info-2
new file mode 100644
index 0000000..cb7c5d1
--- /dev/null
+++ b/doc/gpgme.info-2
@@ -0,0 +1,1309 @@
+This is /home/wk/w/gpgme/doc/gpgme.info, produced by makeinfo version
+4.13 from /home/wk/w/gpgme/doc/gpgme.texi.
+
+INFO-DIR-SECTION GNU Libraries
+START-INFO-DIR-ENTRY
+* GPGME: (gpgme). Adding support for cryptography to your program.
+END-INFO-DIR-ENTRY
+
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010 g10
+Code GmbH.
+
+ Permission is granted to copy, distribute and/or modify this
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+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+ This file documents the GPGME library.
+
+ This is Edition 1.3.2, last updated 2 May 2012, of `The `GnuPG Made
+Easy' Reference Manual', for Version 1.3.2.
+
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010 g10
+Code GmbH.
+
+ Permission is granted to copy, distribute and/or modify this
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+General Public License for more details.
+
+
+File: gpgme.info, Node: Copying, Next: Concept Index, Prev: Library Copying, Up: Top
+
+GNU General Public License
+**************************
+
+ Version 3, 29 June 2007
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+ Copyright (C) 2007 Free Software Foundation, Inc. `http://fsf.org/'
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+=============================================
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+please read `http://www.gnu.org/philosophy/why-not-lgpl.html'.
+
+
+
+File: gpgme.info, Node: Function and Data Index, Prev: Concept Index, Up: Top
+
+Function and Data Index
+***********************
+
+
+* Menu:
+
+* AM_PATH_GPGME: Using Automake. (line 13)
+* AM_PATH_GPGME_PTH: Using Automake. (line 15)
+* AM_PATH_GPGME_PTHREAD: Using Automake. (line 17)
+* CHECKSUM_CREATE_FILES: UI Server Checksum Files.
+ (line 10)
+* CHECKSUM_VERIFY_FILES: UI Server Checksum Files.
+ (line 23)
+* DECRYPT: UI Server Decrypt. (line 27)
+* DECRYPT_FILES: UI Server Verify/Decrypt Files.
+ (line 10)
+* DECRYPT_VERIFY_FILES: UI Server Verify/Decrypt Files.
+ (line 12)
+* ENCRYPT: UI Server Encrypt. (line 46)
+* ENCRYPT_FILES: UI Server Sign/Encrypt Files.
+ (line 10)
+* ENCRYPT_SIGN_FILES: UI Server Sign/Encrypt Files.
+ (line 12)
+* enum gpgme_data_encoding_t: Data Buffer Meta-Data.
+ (line 28)
+* enum gpgme_event_io_t: I/O Callback Interface.
+ (line 57)
+* enum gpgme_hash_algo_t: Hash Algorithms. (line 10)
+* enum gpgme_protocol_t: Protocols and Engines.
+ (line 17)
+* enum gpgme_pubkey_algo_t: Public Key Algorithms.
+ (line 10)
+* enum gpgme_sig_mode_t: Creating a Signature.
+ (line 7)
+* enum gpgme_sig_stat_t: Verify. (line 277)
+* FILE: UI Server Set Input Files.
+ (line 10)
+* GETINFO: Miscellaneous UI Server Commands.
+ (line 10)
+* gpgme_attr_t <1>: Key Signatures. (line 20)
+* gpgme_attr_t: Information About Keys.
+ (line 42)
+* gpgme_cancel: Cancellation. (line 17)
+* gpgme_cancel_async: Cancellation. (line 38)
+* gpgme_check_version: Library Version Check.
+ (line 8)
+* gpgme_ctx_get_engine_info: Crypto Engine. (line 14)
+* gpgme_ctx_set_engine_info: Crypto Engine. (line 27)
+* gpgme_ctx_t: Contexts. (line 13)
+* gpgme_data_encoding_t: Data Buffer Meta-Data.
+ (line 28)
+* gpgme_data_get_encoding: Data Buffer Meta-Data.
+ (line 69)
+* gpgme_data_get_file_name: Data Buffer Meta-Data.
+ (line 7)
+* gpgme_data_new: Memory Based Data Buffers.
+ (line 13)
+* gpgme_data_new_from_cbs: Callback Based Data Buffers.
+ (line 80)
+* gpgme_data_new_from_fd: File Based Data Buffers.
+ (line 12)
+* gpgme_data_new_from_file: Memory Based Data Buffers.
+ (line 40)
+* gpgme_data_new_from_filepart: Memory Based Data Buffers.
+ (line 58)
+* gpgme_data_new_from_mem: Memory Based Data Buffers.
+ (line 24)
+* gpgme_data_new_from_stream: File Based Data Buffers.
+ (line 31)
+* gpgme_data_new_with_read_cb: Callback Based Data Buffers.
+ (line 98)
+* gpgme_data_read: Data Buffer I/O Operations.
+ (line 8)
+* gpgme_data_read_cb_t: Callback Based Data Buffers.
+ (line 12)
+* gpgme_data_release: Destroying Data Buffers.
+ (line 7)
+* gpgme_data_release_and_get_mem: Destroying Data Buffers.
+ (line 13)
+* gpgme_data_release_cb_t: Callback Based Data Buffers.
+ (line 53)
+* gpgme_data_rewind: Data Buffer I/O Operations.
+ (line 62)
+* gpgme_data_seek: Data Buffer I/O Operations.
+ (line 27)
+* gpgme_data_seek_cb_t: Callback Based Data Buffers.
+ (line 44)
+* gpgme_data_set_encoding: Data Buffer Meta-Data.
+ (line 75)
+* gpgme_data_set_file_name: Data Buffer Meta-Data.
+ (line 18)
+* gpgme_data_t: Exchanging Data. (line 14)
+* gpgme_data_write: Data Buffer I/O Operations.
+ (line 18)
+* gpgme_data_write_cb_t: Callback Based Data Buffers.
+ (line 28)
+* gpgme_decrypt_result_t: Decrypt. (line 58)
+* gpgme_edit_cb_t: Advanced Key Editing.
+ (line 8)
+* gpgme_encrypt_result_t: Encrypting a Plaintext.
+ (line 76)
+* gpgme_engine_check_version: Engine Version Check.
+ (line 8)
+* gpgme_engine_info_t: Engine Information. (line 7)
+* gpgme_err_code: Error Values. (line 44)
+* gpgme_err_code_from_errno: Error Values. (line 101)
+* gpgme_err_code_t: Error Values. (line 7)
+* gpgme_err_code_to_errno: Error Values. (line 106)
+* gpgme_err_make: Error Values. (line 60)
+* gpgme_err_make_from_errno: Error Values. (line 87)
+* gpgme_err_source: Error Values. (line 52)
+* gpgme_err_source_t: Error Values. (line 14)
+* gpgme_error: Error Values. (line 69)
+* gpgme_error_from_errno: Error Values. (line 92)
+* gpgme_error_t: Error Values. (line 25)
+* gpgme_error_t (*gpgme_edit_cb_t) (void *HANDLE, gpgme_status_code_t STATUS, const char *ARGS, int FD): Advanced Key Editing.
+ (line 8)
+* gpgme_error_t (*gpgme_io_cb_t) (void *DATA, int FD): I/O Callback Interface.
+ (line 7)
+* gpgme_error_t (*gpgme_passphrase_cb_t)(void *HOOK, const char *UID_HINT, const char *PASSPHRASE_INFO, int PREV_WAS_BAD, int FD): Passphrase Callback.
+ (line 8)
+* gpgme_error_t (*gpgme_register_io_cb_t) (void *DATA, int FD, int DIR, gpgme_io_cb_t FNC, void *FNC_DATA, void **TAG): I/O Callback Interface.
+ (line 21)
+* gpgme_event_io_t <1>: Registering I/O Callbacks.
+ (line 7)
+* gpgme_event_io_t: I/O Callback Interface.
+ (line 57)
+* gpgme_free: Destroying Data Buffers.
+ (line 26)
+* gpgme_genkey_result_t: Generating Keys. (line 75)
+* gpgme_get_armor: ASCII Armor. (line 14)
+* gpgme_get_engine_info: Engine Information. (line 47)
+* gpgme_get_include_certs: Included Certificates.
+ (line 40)
+* gpgme_get_io_cbs: Registering I/O Callbacks.
+ (line 46)
+* gpgme_get_key: Listing Keys. (line 149)
+* gpgme_get_keylist_mode: Key Listing Mode. (line 64)
+* gpgme_get_passphrase_cb: Passphrase Callback. (line 54)
+* gpgme_get_progress_cb: Progress Meter Callback.
+ (line 33)
+* gpgme_get_protocol: Protocol Selection. (line 22)
+* gpgme_get_protocol_name: Protocols and Engines.
+ (line 47)
+* gpgme_get_sig_key: Verify. (line 477)
+* gpgme_get_sig_status: Verify. (line 326)
+* gpgme_get_sig_string_attr: Verify. (line 381)
+* gpgme_get_sig_ulong_attr: Verify. (line 415)
+* gpgme_get_textmode: Text Mode. (line 21)
+* gpgme_hash_algo_name: Hash Algorithms. (line 40)
+* gpgme_hash_algo_t: Hash Algorithms. (line 10)
+* gpgme_import_result_t: Importing Keys. (line 111)
+* gpgme_import_status_t: Importing Keys. (line 73)
+* gpgme_invalid_key_t: Crypto Operations. (line 11)
+* gpgme_io_cb_t: I/O Callback Interface.
+ (line 7)
+* gpgme_key_get_string_attr: Information About Keys.
+ (line 185)
+* gpgme_key_get_ulong_attr: Information About Keys.
+ (line 199)
+* gpgme_key_ref: Manipulating Keys. (line 7)
+* gpgme_key_release: Manipulating Keys. (line 20)
+* gpgme_key_sig_get_string_attr: Key Signatures. (line 78)
+* gpgme_key_sig_get_ulong_attr: Key Signatures. (line 92)
+* gpgme_key_sig_t: Key Management. (line 82)
+* gpgme_key_t: Key Management. (line 190)
+* gpgme_key_unref: Manipulating Keys. (line 11)
+* gpgme_keylist_result_t: Listing Keys. (line 125)
+* gpgme_new: Creating Contexts. (line 7)
+* gpgme_new_signature_t: Creating a Signature.
+ (line 58)
+* gpgme_op_card_edit: Advanced Key Editing.
+ (line 50)
+* gpgme_op_card_edit_start: Advanced Key Editing.
+ (line 57)
+* gpgme_op_decrypt: Decrypt. (line 8)
+* gpgme_op_decrypt_result: Decrypt. (line 81)
+* gpgme_op_decrypt_start: Decrypt. (line 22)
+* gpgme_op_decrypt_verify: Decrypt and Verify. (line 8)
+* gpgme_op_delete: Deleting Keys. (line 8)
+* gpgme_op_delete_start: Deleting Keys. (line 22)
+* gpgme_op_edit: Advanced Key Editing.
+ (line 21)
+* gpgme_op_edit_start: Advanced Key Editing.
+ (line 39)
+* gpgme_op_encrypt: Encrypting a Plaintext.
+ (line 9)
+* gpgme_op_encrypt_result: Encrypting a Plaintext.
+ (line 88)
+* gpgme_op_encrypt_sign: Encrypting a Plaintext.
+ (line 100)
+* gpgme_op_encrypt_sign_start: Encrypting a Plaintext.
+ (line 111)
+* gpgme_op_encrypt_start: Encrypting a Plaintext.
+ (line 61)
+* gpgme_op_export: Exporting Keys. (line 27)
+* gpgme_op_export_ext: Exporting Keys. (line 58)
+* gpgme_op_export_ext_start: Exporting Keys. (line 79)
+* gpgme_op_export_keys: Exporting Keys. (line 90)
+* gpgme_op_export_keys_start: Exporting Keys. (line 113)
+* gpgme_op_export_start: Exporting Keys. (line 47)
+* gpgme_op_genkey: Generating Keys. (line 8)
+* gpgme_op_genkey_result: Generating Keys. (line 97)
+* gpgme_op_genkey_start: Generating Keys. (line 65)
+* gpgme_op_import: Importing Keys. (line 11)
+* gpgme_op_import_ext: Importing Keys. (line 176)
+* gpgme_op_import_keys: Importing Keys. (line 37)
+* gpgme_op_import_keys_start: Importing Keys. (line 62)
+* gpgme_op_import_result: Importing Keys. (line 162)
+* gpgme_op_import_start: Importing Keys. (line 26)
+* gpgme_op_keylist_end: Listing Keys. (line 82)
+* gpgme_op_keylist_ext_start: Listing Keys. (line 36)
+* gpgme_op_keylist_next: Listing Keys. (line 67)
+* gpgme_op_keylist_result: Listing Keys. (line 137)
+* gpgme_op_keylist_start: Listing Keys. (line 8)
+* gpgme_op_passwd: Changing Passphrases.
+ (line 8)
+* gpgme_op_passwd_start: Changing Passphrases.
+ (line 20)
+* gpgme_op_sign: Creating a Signature.
+ (line 23)
+* gpgme_op_sign_result: Creating a Signature.
+ (line 100)
+* gpgme_op_sign_start: Creating a Signature.
+ (line 49)
+* gpgme_op_trustlist_end: Listing Trust Items. (line 45)
+* gpgme_op_trustlist_next: Listing Trust Items. (line 29)
+* gpgme_op_trustlist_start: Listing Trust Items. (line 8)
+* gpgme_op_verify: Verify. (line 9)
+* gpgme_op_verify_result: Verify. (line 261)
+* gpgme_op_verify_start: Verify. (line 29)
+* gpgme_passphrase_cb_t: Passphrase Callback. (line 8)
+* gpgme_progress_cb_t: Progress Meter Callback.
+ (line 8)
+* gpgme_protocol_t <1>: Engine Information. (line 7)
+* gpgme_protocol_t: Protocols and Engines.
+ (line 17)
+* gpgme_pubkey_algo_name: Public Key Algorithms.
+ (line 50)
+* gpgme_pubkey_algo_t: Public Key Algorithms.
+ (line 10)
+* gpgme_recipient_t: Decrypt. (line 31)
+* gpgme_register_io_cb_t: I/O Callback Interface.
+ (line 21)
+* gpgme_release: Destroying Contexts. (line 7)
+* gpgme_result_ref: Result Management. (line 15)
+* gpgme_result_unref: Result Management. (line 21)
+* gpgme_set_armor: ASCII Armor. (line 7)
+* gpgme_set_engine_info: Engine Configuration.
+ (line 14)
+* gpgme_set_include_certs: Included Certificates.
+ (line 8)
+* gpgme_set_io_cbs: Registering I/O Callbacks.
+ (line 37)
+* gpgme_set_keylist_mode: Key Listing Mode. (line 8)
+* gpgme_set_locale: Locale. (line 16)
+* gpgme_set_passphrase_cb: Passphrase Callback. (line 35)
+* gpgme_set_progress_cb: Progress Meter Callback.
+ (line 18)
+* gpgme_set_protocol: Protocol Selection. (line 8)
+* gpgme_set_textmode: Text Mode. (line 7)
+* gpgme_sig_mode_t: Creating a Signature.
+ (line 7)
+* gpgme_sig_notation_add: Signature Notation Data.
+ (line 20)
+* gpgme_sig_notation_clear: Signature Notation Data.
+ (line 11)
+* gpgme_sig_notation_get: Signature Notation Data.
+ (line 43)
+* gpgme_sig_notation_t: Verify. (line 39)
+* gpgme_sig_stat_t: Verify. (line 277)
+* gpgme_sign_result_t: Creating a Signature.
+ (line 86)
+* gpgme_signature_t: Verify. (line 92)
+* gpgme_signers_add: Selecting Signers. (line 15)
+* gpgme_signers_clear: Selecting Signers. (line 7)
+* gpgme_signers_enum: Selecting Signers. (line 22)
+* gpgme_strerror: Error Strings. (line 7)
+* gpgme_strerror_r: Error Strings. (line 17)
+* gpgme_strsource: Error Strings. (line 27)
+* gpgme_sub_key_t: Key Management. (line 12)
+* gpgme_trust_item_get_int_attr: Information About Trust Items.
+ (line 31)
+* gpgme_trust_item_get_string_attr: Information About Trust Items.
+ (line 17)
+* gpgme_trust_item_ref: Manipulating Trust Items.
+ (line 7)
+* gpgme_trust_item_release: Manipulating Trust Items.
+ (line 21)
+* gpgme_trust_item_t: Trust Item Management.
+ (line 9)
+* gpgme_trust_item_unref: Manipulating Trust Items.
+ (line 11)
+* gpgme_user_id_t: Key Management. (line 155)
+* gpgme_validity_t: Information About Keys.
+ (line 10)
+* gpgme_verify_result_t: Verify. (line 245)
+* gpgme_wait: Waiting For Completion.
+ (line 8)
+* IMPORT_FILES: UI Server Import/Export Keys.
+ (line 10)
+* INPUT <1>: UI Server Verify. (line 17)
+* INPUT <2>: UI Server Decrypt. (line 13)
+* INPUT <3>: UI Server Sign. (line 13)
+* INPUT: UI Server Encrypt. (line 23)
+* MESSAGE: UI Server Verify. (line 11)
+* MICALG: UI Server Sign. (line 43)
+* off_t (*gpgme_data_seek_cb_t) (void *HANDLE, off_t OFFSET, int WHENCE): Callback Based Data Buffers.
+ (line 44)
+* OUTPUT <1>: UI Server Verify. (line 24)
+* OUTPUT <2>: UI Server Decrypt. (line 20)
+* OUTPUT <3>: UI Server Sign. (line 19)
+* OUTPUT: UI Server Encrypt. (line 36)
+* PREP_ENCRYPT: UI Server Encrypt. (line 72)
+* PROTOCOL: UI Server Encrypt. (line 97)
+* RECIPIENT: UI Server Encrypt. (line 10)
+* SENDER: Miscellaneous UI Server Commands.
+ (line 51)
+* SESSION: Miscellaneous UI Server Commands.
+ (line 70)
+* SIGN: UI Server Sign. (line 33)
+* SIGN_FILES: UI Server Sign/Encrypt Files.
+ (line 11)
+* SIGSTATUS: UI Server Verify. (line 59)
+* ssize_t (*gpgme_data_read_cb_t) (void *HANDLE, void *BUFFER, size_t SIZE): Callback Based Data Buffers.
+ (line 12)
+* ssize_t (*gpgme_data_write_cb_t) (void *HANDLE, const void *BUFFER, size_t SIZE): Callback Based Data Buffers.
+ (line 28)
+* START_CONFDIALOG: Miscellaneous UI Server Commands.
+ (line 42)
+* START_KEYMANAGER: Miscellaneous UI Server Commands.
+ (line 32)
+* struct gpgme_data_cbs: Callback Based Data Buffers.
+ (line 58)
+* struct gpgme_io_cb_ts: Registering I/O Callbacks.
+ (line 7)
+* VERIFY: UI Server Verify. (line 32)
+* VERIFY_FILES: UI Server Verify/Decrypt Files.
+ (line 11)
+* void (*gpgme_data_release_cb_t) (void *HANDLE): Callback Based Data Buffers.
+ (line 53)
+* void (*gpgme_event_io_cb_t) (void *DATA, gpgme_event_io_t TYPE, void *TYPE_DATA): I/O Callback Interface.
+ (line 89)
+* void (*gpgme_progress_cb_t)(void *HOOK, const char *WHAT, int TYPE, int CURRENT, int TOTAL): Progress Meter Callback.
+ (line 8)
+* void (*gpgme_remove_io_cb_t) (void *TAG): I/O Callback Interface.
+ (line 47)
+* window-id: Miscellaneous UI Server Commands.
+ (line 22)
+
+
+File: gpgme.info, Node: Concept Index, Next: Function and Data Index, Prev: Copying, Up: Top
+
+Concept Index
+*************
+
+
+* Menu:
+
+* aborting operations: Cancellation. (line 6)
+* algorithms: Algorithms. (line 6)
+* algorithms, hash: Hash Algorithms. (line 6)
+* algorithms, message digest: Hash Algorithms. (line 6)
+* algorithms, public key: Public Key Algorithms. (line 6)
+* armor mode: ASCII Armor. (line 6)
+* ASCII armor: ASCII Armor. (line 6)
+* attributes, of a key: Information About Keys.
+ (line 6)
+* attributes, of a trust item: Information About Trust Items.
+ (line 6)
+* autoconf: Using Automake. (line 6)
+* automake: Using Automake. (line 6)
+* backend: Protocols and Engines. (line 6)
+* callback, passphrase: Passphrase Callback. (line 6)
+* callback, progress meter: Progress Meter Callback.
+ (line 6)
+* cancelling operations: Cancellation. (line 6)
+* canonical text mode: Text Mode. (line 6)
+* certificates, included: Included Certificates. (line 6)
+* CMS: Cryptographic Message Syntax.
+ (line 6)
+* compiler flags: Building the Source. (line 6)
+* compiler options: Building the Source. (line 6)
+* configuration of crypto backend: Engine Configuration. (line 6)
+* context: Contexts. (line 6)
+* context, armor mode: ASCII Armor. (line 6)
+* context, attributes: Context Attributes. (line 6)
+* context, configuring engine: Crypto Engine. (line 6)
+* context, creation: Creating Contexts. (line 6)
+* context, destruction: Destroying Contexts. (line 6)
+* context, result of operation: Result Management. (line 6)
+* context, selecting protocol: Protocol Selection. (line 6)
+* context, text mode: Text Mode. (line 6)
+* crypto backend: Protocols and Engines. (line 6)
+* crypto engine: Protocols and Engines. (line 6)
+* cryptographic message syntax: Cryptographic Message Syntax.
+ (line 6)
+* cryptographic operation: Crypto Operations. (line 6)
+* cryptographic operation, aborting: Cancellation. (line 6)
+* cryptographic operation, cancelling: Cancellation. (line 6)
+* cryptographic operation, decryption: Decrypt. (line 6)
+* cryptographic operation, decryption and verification: Decrypt and Verify.
+ (line 6)
+* cryptographic operation, encryption: Encrypt. (line 6)
+* cryptographic operation, running: Run Control. (line 6)
+* cryptographic operation, signature check: Verify. (line 6)
+* cryptographic operation, signing: Sign. (line 6)
+* cryptographic operation, verification: Verify. (line 6)
+* cryptographic operation, wait for: Waiting For Completion.
+ (line 6)
+* data buffer, creation: Creating Data Buffers. (line 6)
+* data buffer, destruction: Destroying Data Buffers.
+ (line 6)
+* data buffer, encoding: Data Buffer Meta-Data. (line 6)
+* data buffer, file name: Data Buffer Meta-Data. (line 6)
+* data buffer, I/O operations: Data Buffer I/O Operations.
+ (line 6)
+* data buffer, manipulation: Manipulating Data Buffers.
+ (line 6)
+* data buffer, meta-data: Data Buffer Meta-Data. (line 6)
+* data buffer, read: Data Buffer I/O Operations.
+ (line 6)
+* data buffer, seek: Data Buffer I/O Operations.
+ (line 6)
+* data buffer, write: Data Buffer I/O Operations.
+ (line 6)
+* data, exchanging: Exchanging Data. (line 6)
+* decryption: Decrypt. (line 6)
+* decryption and verification: Decrypt and Verify. (line 6)
+* encryption: Encrypt. (line 6)
+* engine: Protocols and Engines. (line 6)
+* engine, configuration of: Engine Configuration. (line 6)
+* engine, configuration per context: Crypto Engine. (line 6)
+* engine, GnuPG: OpenPGP. (line 6)
+* engine, GpgSM: Cryptographic Message Syntax.
+ (line 6)
+* engine, information about: Engine Information. (line 6)
+* error codes: Error Values. (line 6)
+* error codes, list of <1>: Error Codes. (line 6)
+* error codes, list of: Error Sources. (line 6)
+* error codes, printing of: Error Strings. (line 6)
+* error handling: Error Handling. (line 6)
+* error sources: Error Values. (line 6)
+* error sources, printing of: Error Strings. (line 6)
+* error strings: Error Strings. (line 6)
+* error values: Error Values. (line 6)
+* error values, printing of: Error Strings. (line 6)
+* event loop, external: Using External Event Loops.
+ (line 6)
+* GDK, using GPGME with: I/O Callback Example GDK.
+ (line 6)
+* GnuPG: OpenPGP. (line 6)
+* GpgSM: Cryptographic Message Syntax.
+ (line 6)
+* GTK+, using GPGME with: I/O Callback Example GTK+.
+ (line 6)
+* hash algorithms: Hash Algorithms. (line 6)
+* header file: Header. (line 6)
+* include file: Header. (line 6)
+* key listing: Listing Keys. (line 6)
+* key listing mode: Key Listing Mode. (line 6)
+* key listing, mode of: Key Listing Mode. (line 6)
+* key listing, start: Listing Keys. (line 6)
+* key management: Key Management. (line 6)
+* key ring, add: Generating Keys. (line 6)
+* key ring, delete from: Deleting Keys. (line 6)
+* key ring, export from: Exporting Keys. (line 6)
+* key ring, import to: Importing Keys. (line 6)
+* key ring, list: Listing Keys. (line 6)
+* key ring, search: Listing Keys. (line 6)
+* key, attributes: Information About Keys.
+ (line 6)
+* key, creation: Generating Keys. (line 6)
+* key, delete: Deleting Keys. (line 6)
+* key, edit: Advanced Key Editing. (line 6)
+* key, export: Exporting Keys. (line 6)
+* key, import: Importing Keys. (line 6)
+* key, information about: Information About Keys.
+ (line 6)
+* key, manipulation: Manipulating Keys. (line 6)
+* key, signatures: Key Signatures. (line 6)
+* largefile support: Largefile Support (LFS).
+ (line 6)
+* LFS: Largefile Support (LFS).
+ (line 6)
+* LGPL, Lesser General Public License: Library Copying. (line 6)
+* libtool: Using Libtool. (line 6)
+* listing keys: Listing Keys. (line 6)
+* locale, default: Locale. (line 6)
+* locale, of a context: Locale. (line 6)
+* message digest algorithms: Hash Algorithms. (line 6)
+* multi-threading: Multi Threading. (line 6)
+* notation data <1>: Signature Notation Data.
+ (line 6)
+* notation data: Verify. (line 6)
+* OpenPGP: OpenPGP. (line 6)
+* passphrase callback: Passphrase Callback. (line 6)
+* passphrase, change: Changing Passphrases. (line 6)
+* policy URL: Signature Notation Data.
+ (line 6)
+* progress meter callback: Progress Meter Callback.
+ (line 6)
+* protocol: Protocols and Engines. (line 6)
+* protocol, CMS: Cryptographic Message Syntax.
+ (line 6)
+* protocol, GnuPG: OpenPGP. (line 6)
+* protocol, S/MIME: Cryptographic Message Syntax.
+ (line 6)
+* protocol, selecting: Protocol Selection. (line 6)
+* public key algorithms: Public Key Algorithms. (line 6)
+* Qt, using GPGME with: I/O Callback Example Qt.
+ (line 6)
+* run control: Run Control. (line 6)
+* S/MIME: Cryptographic Message Syntax.
+ (line 6)
+* sign: Sign. (line 6)
+* signal handling: Signal Handling. (line 6)
+* signals: Signal Handling. (line 6)
+* signature check: Decrypt and Verify. (line 6)
+* signature notation data <1>: Signature Notation Data.
+ (line 6)
+* signature notation data: Verify. (line 6)
+* signature, creation: Sign. (line 6)
+* signature, selecting signers: Selecting Signers. (line 6)
+* signature, verification: Verify. (line 6)
+* signatures, on a key: Key Signatures. (line 6)
+* signers, selecting: Selecting Signers. (line 6)
+* text mode: Text Mode. (line 6)
+* thread-safeness: Multi Threading. (line 6)
+* trust item: Trust Item Management. (line 6)
+* trust item list: Listing Trust Items. (line 6)
+* trust item, attributes: Information About Trust Items.
+ (line 6)
+* trust item, information about: Information About Trust Items.
+ (line 6)
+* trust item, manipulation: Manipulating Trust Items.
+ (line 6)
+* UI server: UI Server Protocol. (line 6)
+* user interface server: UI Server Protocol. (line 6)
+* verification: Verify. (line 6)
+* verification and decryption: Decrypt and Verify. (line 6)
+* version check, of the engines: Engine Version Check. (line 6)
+* version check, of the library: Library Version Check. (line 6)
+* wait for completion: Waiting For Completion.
+ (line 6)
+
+
diff --git a/doc/gpgme.texi b/doc/gpgme.texi
new file mode 100644
index 0000000..61cdb37
--- /dev/null
+++ b/doc/gpgme.texi
@@ -0,0 +1,5787 @@
+\input texinfo @c -*- mode: texinfo; coding: latin-1; -*-
+@documentencoding ISO-8859-1
+@setfilename gpgme.info
+@settitle The `GnuPG Made Easy' Reference Manual
+
+@dircategory GNU Libraries
+@direntry
+* @acronym{GPGME}: (gpgme). Adding support for cryptography to your program.
+@end direntry
+
+@c Unify some of the indices.
+@syncodeindex tp fn
+@syncodeindex pg fn
+
+@copying
+Copyright @copyright{} 2002, 2003, 2004, 2005, 2006, 2007,
+2008, 2010 g10 Code GmbH.
+
+@quotation
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3 of the License, or (at your
+option) any later version. The text of the license can be found in the
+section entitled ``Copying''.
+@end quotation
+
+This document is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+@end copying
+
+@include version.texi
+
+@c Macros used by the description of the UI server protocol
+@macro clnt
+ @sc{c:} @c
+@end macro
+@macro srvr
+ @sc{s:} @c
+@end macro
+
+
+@c
+@c T I T L E P A G E
+@c
+@ifinfo
+This file documents the @acronym{GPGME} library.
+
+This is Edition @value{EDITION}, last updated @value{UPDATED}, of
+@cite{The `GnuPG Made Easy' Reference Manual}, for Version
+@value{VERSION}.
+
+@c NOTE: Don't forget to update the year for the TeX version, too.
+@insertcopying
+
+@end ifinfo
+
+@c We do not want that bastard short titlepage.
+@c @iftex
+@c @shorttitlepage The `GnuPG Made Easy' Reference Manual
+@c @end iftex
+@titlepage
+@center @titlefont{The `GnuPG Made Easy'}
+@sp 1
+@center @titlefont{Reference Manual}
+@sp 6
+@center Edition @value{EDITION}
+@sp 1
+@center last updated @value{UPDATED}
+@sp 1
+@center for version @value{VERSION}
+@page
+@vskip 0pt plus 1filll
+Published by g10 Code GmbH@* Hüttenstr. 61@* 40699 Erkrath, Germany
+
+@insertcopying
+@end titlepage
+@page
+
+@summarycontents
+@contents
+
+@ifnottex
+@node Top
+@top Main Menu
+This is Edition @value{EDITION}, last updated @value{UPDATED}, of
+@cite{The `GnuPG Made Easy' Reference Manual}, for Version
+@value{VERSION} of the @acronym{GPGME} library.
+@end ifnottex
+
+@menu
+* Introduction:: How to use this manual.
+* Preparation:: What you should do before using the library.
+* Protocols and Engines:: Supported crypto protocols.
+* Algorithms:: Supported algorithms.
+* Error Handling:: Error numbers and their meanings.
+* Exchanging Data:: Passing data to and from @acronym{GPGME}.
+* Contexts:: Handling @acronym{GPGME} contexts.
+
+Appendices
+
+* UI Server Protocol:: The GnuPG UI Server Protocol.
+
+* Library Copying:: The GNU Lesser General Public License says
+ how you can copy and share `GnuPG Made Easy'.
+* Copying:: The GNU General Public License says how you
+ can copy and share this manual.
+
+Indices
+
+* Concept Index:: Index of concepts and programs.
+* Function and Data Index:: Index of functions, variables and data types.
+
+
+@detailmenu
+ --- The Detailed Node Listing ---
+
+Introduction
+
+* Getting Started:: Purpose of the manual, and how to use it.
+* Features:: Reasons to install and use @acronym{GPGME}.
+* Overview:: Basic architecture of the @acronym{GPGME} library.
+
+Preparation
+
+* Header:: What header file you need to include.
+* Building the Source:: Compiler options to be used.
+* Largefile Support (LFS):: How to use @acronym{GPGME} with LFS.
+* Using Automake:: Compiler options to be used the easy way.
+* Using Libtool:: Avoiding compiler options entirely.
+* Library Version Check:: Getting and verifying the library version.
+* Signal Handling:: How @acronym{GPGME} affects signal handling.
+* Multi Threading:: How @acronym{GPGME} can be used in an MT environment.
+
+Protocols and Engines
+
+* Engine Version Check:: Verifying the engine version.
+* Engine Information:: Obtaining more information about the engines.
+* Engine Configuration:: Changing the engine configuration.
+* OpenPGP:: Support for the OpenPGP protocol.
+* Cryptographic Message Syntax:: Support for the CMS.
+
+Algorithms
+
+* Public Key Algorithms:: A list of all public key algorithms.
+* Hash Algorithms:: A list of all hash algorithms.
+
+Error Handling
+
+* Error Values:: The error value and what it means.
+* Error Codes:: A list of important error codes.
+* Error Sources:: A list of important error sources.
+* Error Strings:: How to get a descriptive string from a value.
+
+Exchanging Data
+
+* Creating Data Buffers:: Creating new data buffers.
+* Destroying Data Buffers:: Releasing data buffers.
+* Manipulating Data Buffers:: Operations on data buffers.
+
+Creating Data Buffers
+
+* Memory Based Data Buffers:: Creating memory based data buffers.
+* File Based Data Buffers:: Creating file based data buffers.
+* Callback Based Data Buffers:: Creating callback based data buffers.
+
+Manipulating Data Buffers
+
+* Data Buffer I/O Operations:: I/O operations on data buffers.
+* Data Buffer Meta-Data:: Meta-data manipulation of data buffers.
+
+Contexts
+
+* Creating Contexts:: Creating new @acronym{GPGME} contexts.
+* Destroying Contexts:: Releasing @acronym{GPGME} contexts.
+* Result Management:: Managing the result of crypto operations.
+* Context Attributes:: Setting properties of a context.
+* Key Management:: Managing keys with @acronym{GPGME}.
+* Trust Item Management:: Managing trust items with @acronym{GPGME}.
+* Crypto Operations:: Using a context for cryptography.
+* Run Control:: Controlling how operations are run.
+
+Context Attributes
+
+* Protocol Selection:: Selecting the protocol used by a context.
+* Crypto Engine:: Configuring the crypto engine.
+* ASCII Armor:: Requesting @acronym{ASCII} armored output.
+* Text Mode:: Choosing canonical text mode.
+* Included Certificates:: Including a number of certificates.
+* Key Listing Mode:: Selecting key listing mode.
+* Passphrase Callback:: Getting the passphrase from the user.
+* Progress Meter Callback:: Being informed about the progress.
+* Locale:: Setting the locale of a context.
+
+Key Management
+
+* Listing Keys:: Browsing the list of available keys.
+* Information About Keys:: Requesting detailed information about keys.
+* Key Signatures:: Listing the signatures on a key.
+* Manipulating Keys:: Operations on keys.
+* Generating Keys:: Creating new key pairs.
+* Exporting Keys:: Retrieving key data from the key ring.
+* Importing Keys:: Adding keys to the key ring.
+* Deleting Keys:: Removing keys from the key ring.
+* Advanced Key Editing:: Advanced key edit operation.
+
+Trust Item Management
+
+* Listing Trust Items:: Browsing the list of available trust items.
+* Information About Trust Items:: Requesting information about trust items.
+* Manipulating Trust Items:: Operations on trust items.
+
+Crypto Operations
+
+* Decrypt:: Decrypting a ciphertext.
+* Verify:: Verifying a signature.
+* Decrypt and Verify:: Decrypting a signed ciphertext.
+* Sign:: Creating a signature.
+* Encrypt:: Encrypting a plaintext.
+
+Sign
+
+* Selecting Signers:: How to choose the keys to sign with.
+* Creating a Signature:: How to create a signature.
+* Signature Notation Data:: How to add notation data to a signature.
+
+Encrypt
+
+* Encrypting a Plaintext:: How to encrypt a plaintext.
+
+Run Control
+
+* Waiting For Completion:: Waiting until an operation is completed.
+* Using External Event Loops:: Advanced control over what happens when.
+* Cancellation:: How to end pending operations prematurely.
+
+Using External Event Loops
+
+* I/O Callback Interface:: How I/O callbacks are registered.
+* Registering I/O Callbacks:: How to use I/O callbacks for a context.
+* I/O Callback Example:: An example how to use I/O callbacks.
+* I/O Callback Example GTK+:: How to integrate @acronym{GPGME} in GTK+.
+* I/O Callback Example GDK:: How to integrate @acronym{GPGME} in GDK.
+* I/O Callback Example Qt:: How to integrate @acronym{GPGME} in Qt.
+
+@end detailmenu
+@end menu
+
+@node Introduction
+@chapter Introduction
+
+`GnuPG Made Easy' (@acronym{GPGME}) is a C language library that
+allows to add support for cryptography to a program. It is designed
+to make access to public key crypto engines like GnuPG or GpgSM easier
+for applications. @acronym{GPGME} provides a high-level crypto API
+for encryption, decryption, signing, signature verification and key
+management.
+
+@acronym{GPGME} uses GnuPG and GpgSM as its backends to support
+OpenPGP and the Cryptographic Message Syntax (CMS).
+
+@menu
+* Getting Started:: Purpose of the manual, and how to use it.
+* Features:: Reasons to install and use @acronym{GPGME}.
+* Overview:: Basic architecture of the @acronym{GPGME} library.
+@end menu
+
+
+@node Getting Started
+@section Getting Started
+
+This manual documents the @acronym{GPGME} library programming
+interface. All functions and data types provided by the library are
+explained.
+
+The reader is assumed to possess basic knowledge about cryptography in
+general, and public key cryptography in particular. The underlying
+cryptographic engines that are used by the library are not explained,
+but where necessary, special features or requirements by an engine are
+mentioned as far as they are relevant to @acronym{GPGME} or its users.
+
+This manual can be used in several ways. If read from the beginning
+to the end, it gives a good introduction into the library and how it
+can be used in an application. Forward references are included where
+necessary. Later on, the manual can be used as a reference manual to
+get just the information needed about any particular interface of the
+library. Experienced programmers might want to start looking at the
+examples at the end of the manual, and then only read up those parts
+of the interface which are unclear.
+
+
+@node Features
+@section Features
+
+@acronym{GPGME} has a couple of advantages over other libraries doing
+a similar job, and over implementing support for GnuPG or other crypto
+engines into your application directly.
+
+@table @asis
+@item it's free software
+Anybody can use, modify, and redistribute it under the terms of the GNU
+Lesser General Public License (@pxref{Library Copying}).
+
+@item it's flexible
+@acronym{GPGME} provides transparent support for several cryptographic
+protocols by different engines. Currently, @acronym{GPGME} supports
+the OpenPGP protocol using GnuPG as the backend, and the Cryptographic
+Message Syntax using GpgSM as the backend.
+
+@item it's easy
+@acronym{GPGME} hides the differences between the protocols and
+engines from the programmer behind an easy-to-use interface. This way
+the programmer can focus on the other parts of the program, and still
+integrate strong cryptography in his application. Once support for
+@acronym{GPGME} has been added to a program, it is easy to add support
+for other crypto protocols once @acronym{GPGME} backends provide them.
+@end table
+
+
+@node Overview
+@section Overview
+
+@acronym{GPGME} provides a data abstraction that is used to pass data
+to the crypto engine, and receive returned data from it. Data can be
+read from memory or from files, but it can also be provided by a
+callback function.
+
+The actual cryptographic operations are always set within a context.
+A context provides configuration parameters that define the behaviour
+of all operations performed within it. Only one operation per context
+is allowed at any time, but when one operation is finished, you can
+run the next operation in the same context. There can be more than
+one context, and all can run different operations at the same time.
+
+Furthermore, @acronym{GPGME} has rich key management facilities
+including listing keys, querying their attributes, generating,
+importing, exporting and deleting keys, and acquiring information
+about the trust path.
+
+With some precautions, @acronym{GPGME} can be used in a multi-threaded
+environment, although it is not completely thread safe and thus needs
+the support of the application.
+
+
+@node Preparation
+@chapter Preparation
+
+To use @acronym{GPGME}, you have to perform some changes to your
+sources and the build system. The necessary changes are small and
+explained in the following sections. At the end of this chapter, it
+is described how the library is initialized, and how the requirements
+of the library are verified.
+
+@menu
+* Header:: What header file you need to include.
+* Building the Source:: Compiler options to be used.
+* Largefile Support (LFS):: How to use @acronym{GPGME} with LFS.
+* Using Automake:: Compiler options to be used the easy way.
+* Using Libtool:: Avoiding compiler options entirely.
+* Library Version Check:: Getting and verifying the library version.
+* Signal Handling:: How @acronym{GPGME} affects signal handling.
+* Multi Threading:: How @acronym{GPGME} can be used in an MT environment.
+@end menu
+
+
+@node Header
+@section Header
+@cindex header file
+@cindex include file
+
+All interfaces (data types and functions) of the library are defined
+in the header file `gpgme.h'. You must include this in all programs
+using the library, either directly or through some other header file,
+like this:
+
+@example
+#include <gpgme.h>
+@end example
+
+The name space of @acronym{GPGME} is @code{gpgme_*} for function names
+and data types and @code{GPGME_*} for other symbols. Symbols internal
+to @acronym{GPGME} take the form @code{_gpgme_*} and @code{_GPGME_*}.
+
+Because @acronym{GPGME} makes use of the GPG Error library, using
+@acronym{GPGME} will also use the @code{GPG_ERR_*} name space
+directly, and the @code{gpg_err*} and @code{gpg_str*} name space
+indirectly.
+
+
+@node Building the Source
+@section Building the Source
+@cindex compiler options
+@cindex compiler flags
+
+If you want to compile a source file including the `gpgme.h' header
+file, you must make sure that the compiler can find it in the
+directory hierarchy. This is accomplished by adding the path to the
+directory in which the header file is located to the compilers include
+file search path (via the @option{-I} option).
+
+However, the path to the include file is determined at the time the
+source is configured. To solve this problem, gpgme ships with a small
+helper program @command{gpgme-config} that knows about the path to the
+include file and other configuration options. The options that need
+to be added to the compiler invocation at compile time are output by
+the @option{--cflags} option to @command{gpgme-config}. The following
+example shows how it can be used at the command line:
+
+@example
+gcc -c foo.c `gpgme-config --cflags`
+@end example
+
+Adding the output of @samp{gpgme-config --cflags} to the compiler
+command line will ensure that the compiler can find the
+@acronym{GPGME} header file.
+
+A similar problem occurs when linking the program with the library.
+Again, the compiler has to find the library files. For this to work,
+the path to the library files has to be added to the library search
+path (via the @option{-L} option). For this, the option
+@option{--libs} to @command{gpgme-config} can be used. For
+convenience, this option also outputs all other options that are
+required to link the program with @acronym{GPGME} (in particular, the
+@samp{-lgpgme} option). The example shows how to link @file{foo.o}
+with the @acronym{GPGME} library to a program @command{foo}.
+
+@example
+gcc -o foo foo.o `gpgme-config --libs`
+@end example
+
+Of course you can also combine both examples to a single command by
+specifying both options to @command{gpgme-config}:
+
+@example
+gcc -o foo foo.c `gpgme-config --cflags --libs`
+@end example
+
+If you want to link to one of the thread-safe versions of
+@acronym{GPGME}, you must specify the @option{--thread} option before
+any other option to select the thread package you want to link with.
+Supported thread packages are @option{--thread=pth} and
+@option{--thread=pthread}.
+
+
+@node Largefile Support (LFS)
+@section Largefile Support (LFS)
+@cindex largefile support
+@cindex LFS
+
+@acronym{GPGME} is compiled with largefile support by default, if it
+is available on the system. This means that GPGME supports files
+larger than two gigabyte in size, if the underlying operating system
+can. On some systems, largefile support is already the default. On
+such systems, nothing special is required. However, some systems
+provide only support for files up to two gigabyte in size by default.
+Support for larger file sizes has to be specifically enabled.
+
+To make a difficult situation even more complex, such systems provide
+two different types of largefile support. You can either get all
+relevant functions replaced with alternatives that are largefile
+capable, or you can get new functions and data types for largefile
+support added. Those new functions have the same name as their
+smallfile counterparts, but with a suffix of 64.
+
+An example: The data type @code{off_t} is 32 bit wide on GNU/Linux PC
+systems. To address offsets in large files, you can either enable
+largefile support add-on. Then a new data type @code{off64_t} is
+provided, which is 64 bit wide. Or you can replace the existing
+@code{off_t} data type with its 64 bit wide counterpart. All
+occurences of @code{off_t} are then automagically replaced.
+
+As if matters were not complex enough, there are also two different
+types of file descriptors in such systems. This is important because
+if file descriptors are exchanged between programs that use a
+different maximum file size, certain errors must be produced on some
+file descriptors to prevent subtle overflow bugs from occuring.
+
+As you can see, supporting two different maximum file sizes at the
+same time is not at all an easy task. However, the maximum file size
+does matter for @acronym{GPGME}, because some data types it uses in
+its interfaces are affected by that. For example, the @code{off_t}
+data type is used in the @code{gpgme_data_seek} function, to match its
+@acronym{POSIX} counterpart. This affects the call-frame of the
+function, and thus the ABI of the library. Furthermore, file
+descriptors can be exchanged between GPGME and the application.
+
+For you as the user of the library, this means that your program must
+be compiled in the same file size mode as the library. Luckily, there
+is absolutely no valid reason for new programs to not enable largefile
+support by default and just use that. The compatibility modes (small
+file sizes or dual mode) can be considered an historic artefact, only
+useful to allow for a transitional period.
+
+@acronym{GPGME} is compiled using largefile support by default. This
+means that your application must do the same, at least as far as it is
+relevant for using the @file{gpgme.h} header file. All types in this
+header files refer to their largefile counterparts, if they are
+different from any default types on the system.
+
+You can enable largefile support, if it is different from the default
+on the system the application is compiled on, by using the Autoconf
+macro @code{AC_SYS_LARGEFILE}. If you do this, then you don't need to
+worry about anything else: It will just work. In this case you might
+also want to use @code{AC_FUNC_FSEEKO} to take advantage of some new
+interfaces, and @code{AC_TYPE_OFF_T} (just in case).
+
+If you do not use Autoconf, you can define the preprocessor symbol
+@code{_FILE_OFFSET_BITS} to 64 @emph{before} including any header
+files, for example by specifying the option
+@code{-D_FILE_OFFSET_BITS=64} on the compiler command line. You will
+also want to define the preprocessor symbol @code{LARGEFILE_SOURCE} to
+1 in this case, to take advantage of some new interfaces.
+
+If you do not want to do either of the above, you probably know enough
+about the issue to invent your own solution. Just keep in mind that
+the @acronym{GPGME} header file expects that largefile support is
+enabled, if it is available. In particular, we do not support dual
+mode (@code{_LARGEFILE64_SOURCE}).
+
+
+@node Using Automake
+@section Using Automake
+@cindex automake
+@cindex autoconf
+
+It is much easier if you use GNU Automake instead of writing your own
+Makefiles. If you do that you do not have to worry about finding and
+invoking the @command{gpgme-config} script at all. @acronym{GPGME}
+provides an extension to Automake that does all the work for you.
+
+@c A simple macro for optional variables.
+@macro ovar{varname}
+@r{[}@var{\varname\}@r{]}
+@end macro
+@defmac AM_PATH_GPGME (@ovar{minimum-version}, @ovar{action-if-found}, @ovar{action-if-not-found})
+@defmacx AM_PATH_GPGME_PTH (@ovar{minimum-version}, @ovar{action-if-found}, @ovar{action-if-not-found})
+@defmacx AM_PATH_GPGME_PTHREAD (@ovar{minimum-version}, @ovar{action-if-found}, @ovar{action-if-not-found})
+Check whether @acronym{GPGME} (at least version @var{minimum-version},
+if given) exists on the host system. If it is found, execute
+@var{action-if-found}, otherwise do @var{action-if-not-found}, if
+given.
+
+Additionally, the function defines @code{GPGME_CFLAGS} to the flags
+needed for compilation of the program to find the @file{gpgme.h}
+header file, and @code{GPGME_LIBS} to the linker flags needed to link
+the program to the @acronym{GPGME} library.
+
+@code{AM_PATH_GPGME_PTH} checks for the version of @acronym{GPGME}
+that can be used with GNU Pth, and defines @code{GPGME_PTH_CFLAGS} and
+@code{GPGME_PTH_LIBS}.
+
+@code{AM_PATH_GPGME_PTHREAD} checks for the version of @acronym{GPGME}
+that can be used with the native pthread implementation, and defines
+@code{GPGME_PTHREAD_CFLAGS} and @code{GPGME_PTHREAD_LIBS}.
+@end defmac
+
+You can use the defined Autoconf variables like this in your
+@file{Makefile.am}:
+
+@example
+AM_CPPFLAGS = $(GPGME_CFLAGS)
+LDADD = $(GPGME_LIBS)
+@end example
+
+
+@node Using Libtool
+@section Using Libtool
+@cindex libtool
+
+The easiest way is to just use GNU Libtool. If you use libtool, and
+link to @code{libgpgme.la}, @code{libgpgme-pth.la} or
+@code{libgpgme-pthread.la} respectively, everything will be done
+automatically by Libtool.
+
+
+@node Library Version Check
+@section Library Version Check
+@cindex version check, of the library
+
+@deftypefun {const char *} gpgme_check_version (@w{const char *@var{required_version}})
+The function @code{gpgme_check_version} has four purposes. It can be
+used to retrieve the version number of the library. In addition it
+can verify that the version number is higher than a certain required
+version number. In either case, the function initializes some
+sub-systems, and for this reason alone it must be invoked early in
+your program, before you make use of the other functions in
+@acronym{GPGME}. The last purpose is to run selftests.
+
+As a side effect for W32 based systems, the socket layer will get
+initialized.
+
+
+If @var{required_version} is @code{NULL}, the function returns a
+pointer to a statically allocated string containing the version number
+of the library.
+
+If @var{required_version} is not @code{NULL}, it should point to a
+string containing a version number, and the function checks that the
+version of the library is at least as high as the version number
+provided. In this case, the function returns a pointer to a
+statically allocated string containing the version number of the
+library. If @var{REQUIRED_VERSION} is not a valid version number, or
+if the version requirement is not met, the function returns
+@code{NULL}.
+
+If you use a version of a library that is backwards compatible with
+older releases, but contains additional interfaces which your program
+uses, this function provides a run-time check if the necessary
+features are provided by the installed version of the library.
+
+If a selftest fails, the function may still succeed. Selftest errors
+are returned later when invoking @code{gpgme_new}, so that a detailed
+error code can be returned (historically, @code{gpgme_check_version}
+does not return a detailed error code).
+@end deftypefun
+
+
+After initializing @acronym{GPGME}, you should set the locale
+information to the locale required for your output terminal. This
+locale information is needed for example for the curses and Gtk
+pinentry. Here is an example of a complete initialization:
+
+@example
+#include <locale.h>
+#include <gpgme.h>
+
+void
+init_gpgme (void)
+@{
+ /* Initialize the locale environment. */
+ setlocale (LC_ALL, "");
+ gpgme_check_version (NULL);
+ gpgme_set_locale (NULL, LC_CTYPE, setlocale (LC_CTYPE, NULL));
+#ifdef LC_MESSAGES
+ gpgme_set_locale (NULL, LC_MESSAGES, setlocale (LC_MESSAGES, NULL));
+#endif
+@}
+@end example
+
+Note that you are highly recommended to initialize the locale settings
+like this. @acronym{GPGME} can not do this for you because it would
+not be thread safe. The conditional on LC_MESSAGES is only necessary
+for portability to W32 systems.
+
+
+@node Signal Handling
+@section Signal Handling
+@cindex signals
+@cindex signal handling
+
+The @acronym{GPGME} library communicates with child processes (the
+crypto engines). If a child process dies unexpectedly, for example
+due to a bug, or system problem, a @code{SIGPIPE} signal will be
+delivered to the application. The default action is to abort the
+program. To protect against this, @code{gpgme_check_version} sets the
+@code{SIGPIPE} signal action to @code{SIG_IGN}, which means that the
+signal will be ignored.
+
+@acronym{GPGME} will only do that if the signal action for
+@code{SIGPIPE} is @code{SIG_DEF} at the time
+@code{gpgme_check_version} is called. If it is something different,
+@code{GPGME} will take no action.
+
+This means that if your application does not install any signal
+handler for @code{SIGPIPE}, you don't need to take any precautions.
+If you do install a signal handler for @code{SIGPIPE}, you must be
+prepared to handle any @code{SIGPIPE} events that occur due to
+@acronym{GPGME} writing to a defunct pipe. Furthermore, if your
+application is multi-threaded, and you install a signal action for
+@code{SIGPIPE}, you must make sure you do this either before
+@code{gpgme_check_version} is called or afterwards.
+
+
+@node Multi Threading
+@section Multi Threading
+@cindex thread-safeness
+@cindex multi-threading
+
+The @acronym{GPGME} library is not entirely thread-safe, but it can
+still be used in a multi-threaded environment if some care is taken.
+If the following requirements are met, there should be no race
+conditions to worry about:
+
+@itemize @bullet
+@item
+@acronym{GPGME} supports the thread libraries pthread and GNU Pth.
+The support for this has to be enabled at compile time.
+@acronym{GPGME} will automatically detect the location in which the
+thread libraries are installed and activate the support for them at
+build time.
+
+Support for other thread libraries is very easy to add. Please
+contact us if you have the need.
+
+@item
+If you want to use @acronym{GPGME} with threads, you must link to the
+right version of the library. The name of the right library is
+@code{libgpgme-} followed by the name of the thread package you use.
+For example, if you use GNU Pth, the right name is
+@code{libgpgme-pth}. Use the Automake macros or
+@command{gpgme-config} program for simplicity.
+
+
+@item
+The function @code{gpgme_check_version} must be called before any
+other function in the library, because it initializes the thread
+support subsystem in @acronym{GPGME}. To achieve this in
+multi-threaded programs, you must synchronize the memory with respect
+to other threads that also want to use @acronym{GPGME}. For this, it
+is sufficient to call @code{gpgme_check_version} before creating the
+other threads using @acronym{GPGME}@footnote{At least this is true for
+POSIX threads, as @code{pthread_create} is a function that
+synchronizes memory with respects to other threads. There are many
+functions which have this property, a complete list can be found in
+POSIX, IEEE Std 1003.1-2003, Base Definitions, Issue 6, in the
+definition of the term ``Memory Synchronization''. For other thread
+packages other, more relaxed or more strict rules may apply.}.
+
+@item
+Any @code{gpgme_data_t} and @code{gpgme_ctx_t} object must only be
+accessed by one thread at a time. If multiple threads want to deal
+with the same object, the caller has to make sure that operations on
+that object are fully synchronized.
+
+@item
+Only one thread at any time is allowed to call @code{gpgme_wait}. If
+multiple threads call this function, the caller must make sure that
+all invocations are fully synchronized. It is safe to start
+asynchronous operations while a thread is running in gpgme_wait.
+
+@item
+The function @code{gpgme_strerror} is not thread safe. You have to
+use @code{gpgme_strerror_r} instead.
+@end itemize
+
+
+@node Protocols and Engines
+@chapter Protocols and Engines
+@cindex protocol
+@cindex engine
+@cindex crypto engine
+@cindex backend
+@cindex crypto backend
+
+@acronym{GPGME} supports several cryptographic protocols, however, it
+does not implement them. Rather it uses backends (also called
+engines) which implement the protocol. @acronym{GPGME} uses
+inter-process communication to pass data back and forth between the
+application and the backend, but the details of the communication
+protocol and invocation of the backend is completely hidden by the
+interface. All complexity is handled by @acronym{GPGME}. Where an
+exchange of information between the application and the backend is
+necessary, @acronym{GPGME} provides the necessary callback function
+hooks and further interfaces.
+
+@deftp {Data type} {enum gpgme_protocol_t}
+@tindex gpgme_protocol_t
+The @code{gpgme_protocol_t} type specifies the set of possible protocol
+values that are supported by @acronym{GPGME}. The following protocols
+are supported:
+
+@table @code
+@item GPGME_PROTOCOL_OpenPGP
+This specifies the OpenPGP protocol.
+
+@item GPGME_PROTOCOL_CMS
+This specifies the Cryptographic Message Syntax.
+
+@item GPGME_PROTOCOL_ASSUAN
+Under development. Please ask on @email{gnupg-devel@@gnupg.org} for help.
+
+@item GPGME_PROTOCOL_G13
+Under development. Please ask on @email{gnupg-devel@@gnupg.org} for help.
+
+@item GPGME_PROTOCOL_UISERVER
+Under development. Please ask on @email{gnupg-devel@@gnupg.org} for help.
+
+@item GPGME_PROTOCOL_UNKNOWN
+Reserved for future extension. You may use this to indicate that the
+used protocol is not known to the application. Currently,
+@acronym{GPGME} does not accept this value in any operation, though,
+except for @code{gpgme_get_protocol_name}.
+@end table
+@end deftp
+
+
+@deftypefun {const char *} gpgme_get_protocol_name (@w{gpgme_protocol_t @var{protocol}})
+The function @code{gpgme_get_protocol_name} returns a statically
+allocated string describing the protocol @var{protocol}, or
+@code{NULL} if the protocol number is not valid.
+@end deftypefun
+
+@menu
+* Engine Version Check:: Verifying the engine version.
+* Engine Information:: Obtaining more information about the engines.
+* Engine Configuration:: Changing the engine configuration.
+* OpenPGP:: Support for the OpenPGP protocol.
+* Cryptographic Message Syntax:: Support for the CMS.
+@end menu
+
+
+@node Engine Version Check
+@section Engine Version Check
+@cindex version check, of the engines
+
+@deftypefun gpgme_error_t gpgme_engine_check_version (@w{gpgme_protocol_t @var{protocol}})
+The function @code{gpgme_engine_check_version} verifies that the
+engine implementing the protocol @var{PROTOCOL} is installed in the
+expected path and meets the version requirement of @acronym{GPGME}.
+
+This function returns the error code @code{GPG_ERR_NO_ERROR} if the
+engine is available and @code{GPG_ERR_INV_ENGINE} if it is not.
+@end deftypefun
+
+
+@node Engine Information
+@section Engine Information
+@cindex engine, information about
+
+@deftp {Data type} {gpgme_engine_info_t}
+@tindex gpgme_protocol_t
+The @code{gpgme_engine_info_t} type specifies a pointer to a structure
+describing a crypto engine. The structure contains the following
+elements:
+
+@table @code
+@item gpgme_engine_info_t next
+This is a pointer to the next engine info structure in the linked
+list, or @code{NULL} if this is the last element.
+
+@item gpgme_protocol_t protocol
+This is the protocol for which the crypto engine is used. You can
+convert this to a string with @code{gpgme_get_protocol_name} for
+printing.
+
+@item const char *file_name
+This is a string holding the file name of the executable of the crypto
+engine. Currently, it is never @code{NULL}, but using @code{NULL} is
+reserved for future use, so always check before you use it.
+
+@item const char *home_dir
+This is a string holding the directory name of the crypto engine's
+configuration directory. If it is @code{NULL}, then the default
+directory is used.
+
+@item const char *version
+This is a string containing the version number of the crypto engine.
+It might be @code{NULL} if the version number can not be determined,
+for example because the executable doesn't exist or is invalid.
+
+@item const char *req_version
+This is a string containing the minimum required version number of the
+crypto engine for @acronym{GPGME} to work correctly. This is the
+version number that @code{gpgme_engine_check_version} verifies
+against. Currently, it is never @code{NULL}, but using @code{NULL} is
+reserved for future use, so always check before you use it.
+@end table
+@end deftp
+
+@deftypefun gpgme_error_t gpgme_get_engine_info (@w{gpgme_engine_info_t *@var{info}})
+The function @code{gpgme_get_engine_info} returns a linked list of
+engine info structures in @var{info}. Each info structure describes
+the defaults of one configured backend.
+
+The memory for the info structures is allocated the first time this
+function is invoked, and must not be freed by the caller.
+
+This function returns the error code @code{GPG_ERR_NO_ERROR} if
+successful, and a system error if the memory could not be allocated.
+@end deftypefun
+
+Here is an example how you can provide more diagnostics if you receive
+an error message which indicates that the crypto engine is invalid.
+
+@example
+gpgme_ctx_t ctx;
+gpgme_error_t err;
+
+[...]
+
+if (gpgme_err_code (err) == GPG_ERR_INV_ENGINE)
+ @{
+ gpgme_engine_info_t info;
+ err = gpgme_get_engine_info (&info);
+ if (!err)
+ @{
+ while (info && info->protocol != gpgme_get_protocol (ctx))
+ info = info->next;
+ if (!info)
+ fprintf (stderr, "GPGME compiled without support for protocol %s",
+ gpgme_get_protocol_name (info->protocol));
+ else if (info->file_name && !info->version)
+ fprintf (stderr, "Engine %s not installed properly",
+ info->file_name);
+ else if (info->file_name && info->version && info->req_version)
+ fprintf (stderr, "Engine %s version %s installed, "
+ "but at least version %s required", info->file_name,
+ info->version, info->req_version);
+ else
+ fprintf (stderr, "Unknown problem with engine for protocol %s",
+ gpgme_get_protocol_name (info->protocol));
+ @}
+ @}
+@end example
+
+
+@node Engine Configuration
+@section Engine Configuration
+@cindex engine, configuration of
+@cindex configuration of crypto backend
+
+You can change the configuration of a backend engine, and thus change
+the executable program and configuration directory to be used. You
+can make these changes the default or set them for some contexts
+individually.
+
+@deftypefun gpgme_error_t gpgme_set_engine_info (@w{gpgme_protocol_t @var{proto}}, @w{const char *@var{file_name}}, @w{const char *@var{home_dir}})
+The function @code{gpgme_set_engine_info} changes the default
+configuration of the crypto engine implementing the protocol
+@var{proto}.
+
+@var{file_name} is the file name of the executable program
+implementing this protocol, and @var{home_dir} is the directory name
+of the configuration directory for this crypto engine. If
+@var{home_dir} is @code{NULL}, the engine's default will be used.
+
+The new defaults are not applied to already created GPGME contexts.
+
+This function returns the error code @code{GPG_ERR_NO_ERROR} if
+successful, or an eror code on failure.
+@end deftypefun
+
+The functions @code{gpgme_ctx_get_engine_info} and
+@code{gpgme_ctx_set_engine_info} can be used to change the engine
+configuration per context. @xref{Crypto Engine}.
+
+
+@node OpenPGP
+@section OpenPGP
+@cindex OpenPGP
+@cindex GnuPG
+@cindex protocol, GnuPG
+@cindex engine, GnuPG
+
+OpenPGP is implemented by GnuPG, the @acronym{GNU} Privacy Guard.
+This is the first protocol that was supported by @acronym{GPGME}.
+
+The OpenPGP protocol is specified by @code{GPGME_PROTOCOL_OpenPGP}.
+
+
+@node Cryptographic Message Syntax
+@section Cryptographic Message Syntax
+@cindex CMS
+@cindex cryptographic message syntax
+@cindex GpgSM
+@cindex protocol, CMS
+@cindex engine, GpgSM
+@cindex S/MIME
+@cindex protocol, S/MIME
+
+@acronym{CMS} is implemented by GpgSM, the S/MIME implementation for
+GnuPG.
+
+The @acronym{CMS} protocol is specified by @code{GPGME_PROTOCOL_CMS}.
+
+
+@node Algorithms
+@chapter Algorithms
+@cindex algorithms
+
+The crypto backends support a variety of algorithms used in public key
+cryptography.@footnote{Some engines also provide symmetric only
+encryption; see the description of the encryption function on how to use
+this.} The following sections list the identifiers used to denote such
+an algorithm.
+
+@menu
+* Public Key Algorithms:: A list of all public key algorithms.
+* Hash Algorithms:: A list of all hash algorithms.
+@end menu
+
+
+@node Public Key Algorithms
+@section Public Key Algorithms
+@cindex algorithms, public key
+@cindex public key algorithms
+
+Public key algorithms are used for encryption, decryption, signing and
+verification of signatures.
+
+@deftp {Data type} {enum gpgme_pubkey_algo_t}
+@tindex gpgme_pubkey_algo_t
+The @code{gpgme_pubkey_algo_t} type specifies the set of all public key
+algorithms that are supported by @acronym{GPGME}. Possible values
+are:
+
+@table @code
+@item GPGME_PK_RSA
+This value indicates the RSA (Rivest, Shamir, Adleman) algorithm.
+
+@item GPGME_PK_RSA_E
+Deprecated. This value indicates the RSA (Rivest, Shamir, Adleman)
+algorithm for encryption and decryption only.
+
+@item GPGME_PK_RSA_S
+Deprecated. This value indicates the RSA (Rivest, Shamir, Adleman)
+algorithm for signing and verification only.
+
+@item GPGME_PK_DSA
+This value indicates DSA, the Digital Signature Algorithm.
+
+@item GPGME_PK_ELG
+This value indicates ElGamal.
+
+@item GPGME_PK_ELG_E
+This value also indicates ElGamal and is used specifically in GnuPG.
+
+@item GPGME_PK_ELG_E
+This value also indicates ElGamal and is used specifically in GnuPG.
+
+@item GPGME_PK_ECDSA
+This value indicates ECDSA, the Elliptic Curve Digital Signature
+Algorithm as defined by FIPS 186-2.
+
+@item GPGME_PK_ECDH
+This value indicates ECDH, the Eliptic Curve Diffie-Hellmann encryption
+algorithm as defined by the ECC in OpenPGP draft.
+
+@end table
+@end deftp
+
+@deftypefun {const char *} gpgme_pubkey_algo_name (@w{gpgme_pubkey_algo_t @var{algo}})
+The function @code{gpgme_pubkey_algo_name} returns a pointer to a
+statically allocated string containing a description of the public key
+algorithm @var{algo}. This string can be used to output the name of
+the public key algorithm to the user.
+
+If @var{algo} is not a valid public key algorithm, @code{NULL} is
+returned.
+@end deftypefun
+
+
+@node Hash Algorithms
+@section Hash Algorithms
+@cindex algorithms, hash
+@cindex algorithms, message digest
+@cindex hash algorithms
+@cindex message digest algorithms
+
+Hash (message digest) algorithms are used to compress a long message
+to make it suitable for public key cryptography.
+
+@deftp {Data type} {enum gpgme_hash_algo_t}
+@tindex gpgme_hash_algo_t
+The @code{gpgme_hash_algo_t} type specifies the set of all hash algorithms
+that are supported by @acronym{GPGME}. Possible values are:
+
+@table @code
+@item GPGME_MD_MD5
+@item GPGME_MD_SHA1
+@item GPGME_MD_RMD160
+@item GPGME_MD_MD2
+@item GPGME_MD_TIGER
+@item GPGME_MD_HAVAL
+@item GPGME_MD_SHA256
+@item GPGME_MD_SHA384
+@item GPGME_MD_SHA512
+@item GPGME_MD_MD4
+@item GPGME_MD_CRC32
+@item GPGME_MD_CRC32_RFC1510
+@item GPGME_MD_CRC24_RFC2440
+@end table
+@end deftp
+
+@deftypefun {const char *} gpgme_hash_algo_name (@w{gpgme_hash_algo_t @var{algo}})
+The function @code{gpgme_hash_algo_name} returns a pointer to a
+statically allocated string containing a description of the hash
+algorithm @var{algo}. This string can be used to output the name of
+the hash algorithm to the user.
+
+If @var{algo} is not a valid hash algorithm, @code{NULL} is returned.
+@end deftypefun
+
+
+@node Error Handling
+@chapter Error Handling
+@cindex error handling
+
+Many functions in @acronym{GPGME} can return an error if they fail.
+For this reason, the application should always catch the error
+condition and take appropriate measures, for example by releasing the
+resources and passing the error up to the caller, or by displaying a
+descriptive message to the user and cancelling the operation.
+
+Some error values do not indicate a system error or an error in the
+operation, but the result of an operation that failed properly. For
+example, if you try to decrypt a tempered message, the decryption will
+fail. Another error value actually means that the end of a data
+buffer or list has been reached. The following descriptions explain
+for many error codes what they mean usually. Some error values have
+specific meanings if returned by a certain functions. Such cases are
+described in the documentation of those functions.
+
+@acronym{GPGME} uses the @code{libgpg-error} library. This allows to
+share the error codes with other components of the GnuPG system, and
+thus pass error values transparently from the crypto engine, or some
+helper application of the crypto engine, to the user. This way no
+information is lost. As a consequence, @acronym{GPGME} does not use
+its own identifiers for error codes, but uses those provided by
+@code{libgpg-error}. They usually start with @code{GPG_ERR_}.
+
+However, @acronym{GPGME} does provide aliases for the functions
+defined in libgpg-error, which might be preferred for name space
+consistency.
+
+@menu
+* Error Values:: The error value and what it means.
+* Error Sources:: A list of important error sources.
+* Error Codes:: A list of important error codes.
+* Error Strings:: How to get a descriptive string from a value.
+@end menu
+
+
+@node Error Values
+@section Error Values
+@cindex error values
+@cindex error codes
+@cindex error sources
+
+@deftp {Data type} {gpgme_err_code_t}
+The @code{gpgme_err_code_t} type is an alias for the @code{libgpg-error}
+type @code{gpg_err_code_t}. The error code indicates the type of an
+error, or the reason why an operation failed.
+
+A list of important error codes can be found in the next section.
+@end deftp
+
+@deftp {Data type} {gpgme_err_source_t}
+The @code{gpgme_err_source_t} type is an alias for the
+@code{libgpg-error} type @code{gpg_err_source_t}. The error source
+has not a precisely defined meaning. Sometimes it is the place where
+the error happened, sometimes it is the place where an error was
+encoded into an error value. Usually the error source will give an
+indication to where to look for the problem. This is not always true,
+but it is attempted to achieve this goal.
+
+A list of important error sources can be found in the next section.
+@end deftp
+
+@deftp {Data type} {gpgme_error_t}
+The @code{gpgme_error_t} type is an alias for the @code{libgpg-error}
+type @code{gpg_error_t}. An error value like this has always two
+components, an error code and an error source. Both together form the
+error value.
+
+Thus, the error value can not be directly compared against an error
+code, but the accessor functions described below must be used.
+However, it is guaranteed that only 0 is used to indicate success
+(@code{GPG_ERR_NO_ERROR}), and that in this case all other parts of
+the error value are set to 0, too.
+
+Note that in @acronym{GPGME}, the error source is used purely for
+diagnostical purposes. Only the error code should be checked to test
+for a certain outcome of a function. The manual only documents the
+error code part of an error value. The error source is left
+unspecified and might be anything.
+@end deftp
+
+@deftypefun {static inline gpgme_err_code_t} gpgme_err_code (@w{gpgme_error_t @var{err}})
+The static inline function @code{gpgme_err_code} returns the
+@code{gpgme_err_code_t} component of the error value @var{err}. This
+function must be used to extract the error code from an error value in
+order to compare it with the @code{GPG_ERR_*} error code macros.
+@end deftypefun
+
+@deftypefun {static inline gpgme_err_source_t} gpgme_err_source (@w{gpgme_error_t @var{err}})
+The static inline function @code{gpgme_err_source} returns the
+@code{gpgme_err_source_t} component of the error value @var{err}. This
+function must be used to extract the error source from an error value in
+order to compare it with the @code{GPG_ERR_SOURCE_*} error source macros.
+@end deftypefun
+
+@deftypefun {static inline gpgme_error_t} gpgme_err_make (@w{gpgme_err_source_t @var{source}}, @w{gpgme_err_code_t @var{code}})
+The static inline function @code{gpgme_err_make} returns the error
+value consisting of the error source @var{source} and the error code
+@var{code}.
+
+This function can be used in callback functions to construct an error
+value to return it to the library.
+@end deftypefun
+
+@deftypefun {static inline gpgme_error_t} gpgme_error (@w{gpgme_err_code_t @var{code}})
+The static inline function @code{gpgme_error} returns the error value
+consisting of the default error source and the error code @var{code}.
+
+For @acronym{GPGME} applications, the default error source is
+@code{GPG_ERR_SOURCE_USER_1}. You can define
+@code{GPGME_ERR_SOURCE_DEFAULT} before including @file{gpgme.h} to
+change this default.
+
+This function can be used in callback functions to construct an error
+value to return it to the library.
+@end deftypefun
+
+The @code{libgpg-error} library provides error codes for all system
+error numbers it knows about. If @var{err} is an unknown error
+number, the error code @code{GPG_ERR_UNKNOWN_ERRNO} is used. The
+following functions can be used to construct error values from system
+errnor numbers.
+
+@deftypefun {gpgme_error_t} gpgme_err_make_from_errno (@w{gpgme_err_source_t @var{source}}, @w{int @var{err}})
+The function @code{gpgme_err_make_from_errno} is like
+@code{gpgme_err_make}, but it takes a system error like @code{errno}
+instead of a @code{gpgme_err_code_t} error code.
+@end deftypefun
+
+@deftypefun {gpgme_error_t} gpgme_error_from_errno (@w{int @var{err}})
+The function @code{gpgme_error_from_errno} is like @code{gpgme_error},
+but it takes a system error like @code{errno} instead of a
+@code{gpgme_err_code_t} error code.
+@end deftypefun
+
+Sometimes you might want to map system error numbers to error codes
+directly, or map an error code representing a system error back to the
+system error number. The following functions can be used to do that.
+
+@deftypefun {gpgme_err_code_t} gpgme_err_code_from_errno (@w{int @var{err}})
+The function @code{gpgme_err_code_from_errno} returns the error code
+for the system error @var{err}. If @var{err} is not a known system
+error, the function returns @code{GPG_ERR_UNKNOWN_ERRNO}.
+@end deftypefun
+
+@deftypefun {int} gpgme_err_code_to_errno (@w{gpgme_err_code_t @var{err}})
+The function @code{gpgme_err_code_to_errno} returns the system error
+for the error code @var{err}. If @var{err} is not an error code
+representing a system error, or if this system error is not defined on
+this system, the function returns @code{0}.
+@end deftypefun
+
+
+@node Error Sources
+@section Error Sources
+@cindex error codes, list of
+
+The library @code{libgpg-error} defines an error source for every
+component of the GnuPG system. The error source part of an error
+value is not well defined. As such it is mainly useful to improve the
+diagnostic error message for the user.
+
+If the error code part of an error value is @code{0}, the whole error
+value will be @code{0}. In this case the error source part is of
+course @code{GPG_ERR_SOURCE_UNKNOWN}.
+
+The list of error sources that might occur in applications using
+@acronym{GPGME} is:
+
+@table @code
+@item GPG_ERR_SOURCE_UNKNOWN
+The error source is not known. The value of this error source is
+@code{0}.
+
+@item GPG_ERR_SOURCE_GPGME
+The error source is @acronym{GPGME} itself. This is the default for
+errors that occur in the @acronym{GPGME} library.
+
+@item GPG_ERR_SOURCE_GPG
+The error source is GnuPG, which is the crypto engine used for the
+OpenPGP protocol.
+
+@item GPG_ERR_SOURCE_GPGSM
+The error source is GPGSM, which is the crypto engine used for the
+CMS protocol.
+
+@item GPG_ERR_SOURCE_GCRYPT
+The error source is @code{libgcrypt}, which is used by crypto engines
+to perform cryptographic operations.
+
+@item GPG_ERR_SOURCE_GPGAGENT
+The error source is @command{gpg-agent}, which is used by crypto
+engines to perform operations with the secret key.
+
+@item GPG_ERR_SOURCE_PINENTRY
+The error source is @command{pinentry}, which is used by
+@command{gpg-agent} to query the passphrase to unlock a secret key.
+
+@item GPG_ERR_SOURCE_SCD
+The error source is the SmartCard Daemon, which is used by
+@command{gpg-agent} to delegate operations with the secret key to a
+SmartCard.
+
+@item GPG_ERR_SOURCE_KEYBOX
+The error source is @code{libkbx}, a library used by the crypto
+engines to manage local keyrings.
+
+@item GPG_ERR_SOURCE_USER_1
+@item GPG_ERR_SOURCE_USER_2
+@item GPG_ERR_SOURCE_USER_3
+@item GPG_ERR_SOURCE_USER_4
+These error sources are not used by any GnuPG component and can be
+used by other software. For example, applications using
+@acronym{GPGME} can use them to mark error values coming from callback
+handlers. Thus @code{GPG_ERR_SOURCE_USER_1} is the default for errors
+created with @code{gpgme_error} and @code{gpgme_error_from_errno},
+unless you define @code{GPGME_ERR_SOURCE_DEFAULT} before including
+@file{gpgme.h}.
+@end table
+
+
+@node Error Codes
+@section Error Codes
+@cindex error codes, list of
+
+The library @code{libgpg-error} defines many error values. Most of
+them are not used by @code{GPGME} directly, but might be returned by
+@acronym{GPGME} because it received them from the crypto engine. The
+below list only includes such error codes that have a specific meaning
+in @code{GPGME}, or which are so common that you should know about
+them.
+
+@table @code
+@item GPG_ERR_EOF
+This value indicates the end of a list, buffer or file.
+
+@item GPG_ERR_NO_ERROR
+This value indicates success. The value of this error code is
+@code{0}. Also, it is guaranteed that an error value made from the
+error code @code{0} will be @code{0} itself (as a whole). This means
+that the error source information is lost for this error code,
+however, as this error code indicates that no error occured, this is
+generally not a problem.
+
+@item GPG_ERR_GENERAL
+This value means that something went wrong, but either there is not
+enough information about the problem to return a more useful error
+value, or there is no separate error value for this type of problem.
+
+@item GPG_ERR_ENOMEM
+This value means that an out-of-memory condition occurred.
+
+@item GPG_ERR_E...
+System errors are mapped to GPG_ERR_FOO where FOO is the symbol for
+the system error.
+
+@item GPG_ERR_INV_VALUE
+This value means that some user provided data was out of range. This
+can also refer to objects. For example, if an empty
+@code{gpgme_data_t} object was expected, but one containing data was
+provided, this error value is returned.
+
+@item GPG_ERR_UNUSABLE_PUBKEY
+This value means that some recipients for a message were invalid.
+
+@item GPG_ERR_UNUSABLE_SECKEY
+This value means that some signers were invalid.
+
+@item GPG_ERR_NO_DATA
+This value means that a @code{gpgme_data_t} object which was expected
+to have content was found empty.
+
+@item GPG_ERR_CONFLICT
+This value means that a conflict of some sort occurred.
+
+@item GPG_ERR_NOT_IMPLEMENTED
+This value indicates that the specific function (or operation) is not
+implemented. This error should never happen. It can only occur if
+you use certain values or configuration options which do not work,
+but for which we think that they should work at some later time.
+
+@item GPG_ERR_DECRYPT_FAILED
+This value indicates that a decryption operation was unsuccessful.
+
+@item GPG_ERR_BAD_PASSPHRASE
+This value means that the user did not provide a correct passphrase
+when requested.
+
+@item GPG_ERR_CANCELED
+This value means that the operation was canceled.
+
+@item GPG_ERR_INV_ENGINE
+This value means that the engine that implements the desired protocol
+is currently not available. This can either be because the sources
+were configured to exclude support for this engine, or because the
+engine is not installed properly.
+
+@item GPG_ERR_AMBIGUOUS_NAME
+This value indicates that a user ID or other specifier did not specify
+a unique key.
+
+@item GPG_ERR_WRONG_KEY_USAGE
+This value indicates that a key is not used appropriately.
+
+@item GPG_ERR_CERT_REVOKED
+This value indicates that a key signature was revoced.
+
+@item GPG_ERR_CERT_EXPIRED
+This value indicates that a key signature expired.
+
+@item GPG_ERR_NO_CRL_KNOWN
+This value indicates that no certificate revocation list is known for
+the certificate.
+
+@item GPG_ERR_NO_POLICY_MATCH
+This value indicates that a policy issue occured.
+
+@item GPG_ERR_NO_SECKEY
+This value indicates that no secret key for the user ID is available.
+
+@item GPG_ERR_MISSING_CERT
+This value indicates that a key could not be imported because the
+issuer certificate is missing.
+
+@item GPG_ERR_BAD_CERT_CHAIN
+This value indicates that a key could not be imported because its
+certificate chain is not good, for example it could be too long.
+
+@item GPG_ERR_UNSUPPORTED_ALGORITHM
+This value means a verification failed because the cryptographic
+algorithm is not supported by the crypto backend.
+
+@item GPG_ERR_BAD_SIGNATURE
+This value means a verification failed because the signature is bad.
+
+@item GPG_ERR_NO_PUBKEY
+This value means a verification failed because the public key is not
+available.
+
+@item GPG_ERR_USER_1
+@item GPG_ERR_USER_2
+@item ...
+@item GPG_ERR_USER_16
+These error codes are not used by any GnuPG component and can be
+freely used by other software. Applications using @acronym{GPGME}
+might use them to mark specific errors returned by callback handlers
+if no suitable error codes (including the system errors) for
+these errors exist already.
+@end table
+
+
+@node Error Strings
+@section Error Strings
+@cindex error values, printing of
+@cindex error codes, printing of
+@cindex error sources, printing of
+@cindex error strings
+
+@deftypefun {const char *} gpgme_strerror (@w{gpgme_error_t @var{err}})
+The function @code{gpgme_strerror} returns a pointer to a statically
+allocated string containing a description of the error code contained
+in the error value @var{err}. This string can be used to output a
+diagnostic message to the user.
+
+This function is not thread safe. Use @code{gpgme_strerror_r} in
+multi-threaded programs.
+@end deftypefun
+
+
+@deftypefun {int} gpgme_strerror_r (@w{gpgme_error_t @var{err}}, @w{char *@var{buf}}, @w{size_t @var{buflen}})
+The function @code{gpgme_strerror_r} returns the error string for
+@var{err} in the user-supplied buffer @var{buf} of size @var{buflen}.
+This function is, in contrast to @code{gpgme_strerror}, thread-safe if
+a thread-safe @code{strerror_r} function is provided by the system.
+If the function succeeds, 0 is returned and @var{buf} contains the
+string describing the error. If the buffer was not large enough,
+ERANGE is returned and @var{buf} contains as much of the beginning of
+the error string as fits into the buffer.
+@end deftypefun
+
+
+@deftypefun {const char *} gpgme_strsource (@w{gpgme_error_t @var{err}})
+The function @code{gpgme_strerror} returns a pointer to a statically
+allocated string containing a description of the error source
+contained in the error value @var{err}. This string can be used to
+output a diagnostic message to the user.
+@end deftypefun
+
+The following example illustrates the use of @code{gpgme_strerror}:
+
+@example
+gpgme_ctx_t ctx;
+gpgme_error_t err = gpgme_new (&ctx);
+if (err)
+ @{
+ fprintf (stderr, "%s: creating GpgME context failed: %s: %s\n",
+ argv[0], gpgme_strsource (err), gpgme_strerror (err));
+ exit (1);
+ @}
+@end example
+
+
+@node Exchanging Data
+@chapter Exchanging Data
+@cindex data, exchanging
+
+A lot of data has to be exchanged between the user and the crypto
+engine, like plaintext messages, ciphertext, signatures and
+information about the keys. The technical details about exchanging
+the data information are completely abstracted by @acronym{GPGME}.
+The user provides and receives the data via @code{gpgme_data_t} objects,
+regardless of the communication protocol between @acronym{GPGME} and
+the crypto engine in use.
+
+@deftp {Data type} {gpgme_data_t}
+The @code{gpgme_data_t} type is a handle for a container for generic
+data, which is used by @acronym{GPGME} to exchange data with the user.
+@end deftp
+
+@code{gpgme_data_t} objects do not provide notifications on events.
+It is assumed that read and write operations are blocking until data
+is available. If this is undesirable, the application must ensure
+that all GPGME data operations always have data available, for example
+by using memory buffers or files rather than pipes or sockets. This
+might be relevant, for example, if the external event loop mechanism
+is used.
+
+@menu
+* Creating Data Buffers:: Creating new data buffers.
+* Destroying Data Buffers:: Releasing data buffers.
+* Manipulating Data Buffers:: Operations on data buffers.
+@end menu
+
+
+@node Creating Data Buffers
+@section Creating Data Buffers
+@cindex data buffer, creation
+
+Data objects can be based on memory, files, or callback functions
+provided by the user. Not all operations are supported by all
+objects.
+
+
+@menu
+* Memory Based Data Buffers:: Creating memory based data buffers.
+* File Based Data Buffers:: Creating file based data buffers.
+* Callback Based Data Buffers:: Creating callback based data buffers.
+@end menu
+
+
+@node Memory Based Data Buffers
+@subsection Memory Based Data Buffers
+
+Memory based data objects store all data in allocated memory. This is
+convenient, but only practical for an amount of data that is a
+fraction of the available physical memory. The data has to be copied
+from its source and to its destination, which can often be avoided by
+using one of the other data object
+
+@deftypefun gpgme_error_t gpgme_data_new (@w{gpgme_data_t *@var{dh}})
+The function @code{gpgme_data_new} creates a new @code{gpgme_data_t}
+object and returns a handle for it in @var{dh}. The data object is
+memory based and initially empty.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+data object was successfully created, @code{GPG_ERR_INV_VALUE} if
+@var{dh} is not a valid pointer, and @code{GPG_ERR_ENOMEM} if not
+enough memory is available.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_data_new_from_mem (@w{gpgme_data_t *@var{dh}}, @w{const char *@var{buffer}}, @w{size_t @var{size}}, @w{int @var{copy}})
+The function @code{gpgme_data_new_from_mem} creates a new
+@code{gpgme_data_t} object and fills it with @var{size} bytes starting
+from @var{buffer}.
+
+If @var{copy} is not zero, a private copy of the data is made. If
+@var{copy} is zero, the data is taken from the specified buffer as
+needed, and the user has to ensure that the buffer remains valid for
+the whole life span of the data object.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+data object was successfully created, @code{GPG_ERR_INV_VALUE} if
+@var{dh} or @var{buffer} is not a valid pointer, and
+@code{GPG_ERR_ENOMEM} if not enough memory is available.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_data_new_from_file (@w{gpgme_data_t *@var{dh}}, @w{const char *@var{filename}}, @w{int @var{copy}})
+The function @code{gpgme_data_new_from_file} creates a new
+@code{gpgme_data_t} object and fills it with the content of the file
+@var{filename}.
+
+If @var{copy} is not zero, the whole file is read in at initialization
+time and the file is not used anymore after that. This is the only
+mode supported currently. Later, a value of zero for @var{copy} might
+cause all reads to be delayed until the data is needed, but this is
+not yet implemented.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+data object was successfully created, @code{GPG_ERR_INV_VALUE} if
+@var{dh} or @var{filename} is not a valid pointer,
+@code{GPG_ERR_NOT_IMPLEMENTED} if @var{code} is zero, and
+@code{GPG_ERR_ENOMEM} if not enough memory is available.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_data_new_from_filepart (@w{gpgme_data_t *@var{dh}}, @w{const char *@var{filename}}, @w{FILE *@var{fp}}, @w{off_t @var{offset}}, @w{size_t @var{length}})
+The function @code{gpgme_data_new_from_filepart} creates a new
+@code{gpgme_data_t} object and fills it with a part of the file specified
+by @var{filename} or @var{fp}.
+
+Exactly one of @var{filename} and @var{fp} must be non-zero, the other
+must be zero. The argument that is not zero specifies the file from
+which @var{length} bytes are read into the data object, starting from
+@var{offset}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+data object was successfully created, @code{GPG_ERR_INV_VALUE} if
+@var{dh} and exactly one of @var{filename} and @var{fp} is not a valid
+pointer, and @code{GPG_ERR_ENOMEM} if not enough memory is available.
+@end deftypefun
+
+
+@node File Based Data Buffers
+@subsection File Based Data Buffers
+
+File based data objects operate directly on file descriptors or
+streams. Only a small amount of data is stored in core at any time,
+so the size of the data objects is not limited by @acronym{GPGME}.
+
+@deftypefun gpgme_error_t gpgme_data_new_from_fd (@w{gpgme_data_t *@var{dh}}, @w{int @var{fd}})
+The function @code{gpgme_data_new_from_fd} creates a new
+@code{gpgme_data_t} object and uses the file descriptor @var{fd} to read
+from (if used as an input data object) and write to (if used as an
+output data object).
+
+When using the data object as an input buffer, the function might read
+a bit more from the file descriptor than is actually needed by the
+crypto engine in the desired operation because of internal buffering.
+
+Note that GPGME assumes that the file descriptor is set to blocking
+mode. Errors during I/O operations, except for EINTR, are usually
+fatal for crypto operations.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+data object was successfully created, and @code{GPG_ERR_ENOMEM} if not
+enough memory is available.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_data_new_from_stream (@w{gpgme_data_t *@var{dh}}, @w{FILE *@var{stream}})
+The function @code{gpgme_data_new_from_stream} creates a new
+@code{gpgme_data_t} object and uses the I/O stream @var{stream} to read
+from (if used as an input data object) and write to (if used as an
+output data object).
+
+When using the data object as an input buffer, the function might read
+a bit more from the stream than is actually needed by the crypto
+engine in the desired operation because of internal buffering.
+
+Note that GPGME assumes that the stream is in blocking mode. Errors
+during I/O operations, except for EINTR, are usually fatal for crypto
+operations.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+data object was successfully created, and @code{GPG_ERR_ENOMEM} if not
+enough memory is available.
+@end deftypefun
+
+
+@node Callback Based Data Buffers
+@subsection Callback Based Data Buffers
+
+If neither memory nor file based data objects are a good fit for your
+application, you can implement the functions a data object provides
+yourself and create a data object from these callback functions.
+
+@deftp {Data type} {ssize_t (*gpgme_data_read_cb_t) (@w{void *@var{handle}}, @w{void @var{*buffer}}, @w{size_t @var{size}})}
+@tindex gpgme_data_read_cb_t
+The @code{gpgme_data_read_cb_t} type is the type of functions which
+@acronym{GPGME} calls if it wants to read data from a user-implemented
+data object. The function should read up to @var{size} bytes from the
+current read position into the space starting at @var{buffer}. The
+@var{handle} is provided by the user at data object creation time.
+
+Note that GPGME assumes that the read blocks until data is available.
+Errors during I/O operations, except for EINTR, are usually fatal for
+crypto operations.
+
+The function should return the number of bytes read, 0 on EOF, and -1
+on error. If an error occurs, @var{errno} should be set to describe
+the type of the error.
+@end deftp
+
+@deftp {Data type} {ssize_t (*gpgme_data_write_cb_t) (@w{void *@var{handle}}, @w{const void @var{*buffer}}, @w{size_t @var{size}})}
+@tindex gpgme_data_write_cb_t
+The @code{gpgme_data_write_cb_t} type is the type of functions which
+@acronym{GPGME} calls if it wants to write data to a user-implemented
+data object. The function should write up to @var{size} bytes to the
+current write position from the space starting at @var{buffer}. The
+@var{handle} is provided by the user at data object creation time.
+
+Note that GPGME assumes that the write blocks until data is available.
+Errors during I/O operations, except for EINTR, are usually fatal for
+crypto operations.
+
+The function should return the number of bytes written, and -1 on
+error. If an error occurs, @var{errno} should be set to describe the
+type of the error.
+@end deftp
+
+@deftp {Data type} {off_t (*gpgme_data_seek_cb_t) (@w{void *@var{handle}}, @w{off_t @var{offset}}, @w{int @var{whence}})}
+@tindex gpgme_data_seek_cb_t
+The @code{gpgme_data_seek_cb_t} type is the type of functions which
+@acronym{GPGME} calls if it wants to change the current read/write
+position in a user-implemented data object, just like the @code{lseek}
+function.
+
+The function should return the new read/write position, and -1 on
+error. If an error occurs, @var{errno} should be set to describe the
+type of the error.
+@end deftp
+
+@deftp {Data type} {void (*gpgme_data_release_cb_t) (@w{void *@var{handle}})}
+@tindex gpgme_data_release_cb_t
+The @code{gpgme_data_release_cb_t} type is the type of functions which
+@acronym{GPGME} calls if it wants to destroy a user-implemented data
+object. The @var{handle} is provided by the user at data object
+creation time.
+@end deftp
+
+@deftp {Data type} {struct gpgme_data_cbs}
+This structure is used to store the data callback interface functions
+described above. It has the following members:
+
+@table @code
+@item gpgme_data_read_cb_t read
+This is the function called by @acronym{GPGME} to read data from the
+data object. It is only required for input data object.
+
+@item gpgme_data_write_cb_t write
+This is the function called by @acronym{GPGME} to write data to the
+data object. It is only required for output data object.
+
+@item gpgme_data_seek_cb_t seek
+This is the function called by @acronym{GPGME} to change the current
+read/write pointer in the data object (if available). It is optional.
+
+@item gpgme_data_release_cb_t release
+This is the function called by @acronym{GPGME} to release a data
+object. It is optional.
+@end table
+@end deftp
+
+@deftypefun gpgme_error_t gpgme_data_new_from_cbs (@w{gpgme_data_t *@var{dh}}, @w{gpgme_data_cbs_t @var{cbs}}, @w{void *@var{handle}})
+The function @code{gpgme_data_new_from_cbs} creates a new
+@code{gpgme_data_t} object and uses the user-provided callback functions
+to operate on the data object.
+
+The handle @var{handle} is passed as first argument to the callback
+functions. This can be used to identify this data object.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+data object was successfully created, and @code{GPG_ERR_ENOMEM} if not
+enough memory is available.
+@end deftypefun
+
+The following interface is deprecated and only provided for backward
+compatibility. Don't use it. It will be removed in a future version
+of @acronym{GPGME}.
+
+@deftypefun gpgme_error_t gpgme_data_new_with_read_cb (@w{gpgme_data_t *@var{dh}}, @w{int (*@var{readfunc})} (@w{void *@var{hook}}, @w{char *@var{buffer}}, @w{size_t @var{count}}, @w{size_t *@var{nread}}), @w{void *@var{hook_value}})
+The function @code{gpgme_data_new_with_read_cb} creates a new
+@code{gpgme_data_t} object and uses the callback function @var{readfunc}
+to retrieve the data on demand. As the callback function can supply
+the data in any way it wants, this is the most flexible data type
+@acronym{GPGME} provides. However, it can not be used to write data.
+
+The callback function receives @var{hook_value} as its first argument
+whenever it is invoked. It should return up to @var{count} bytes in
+@var{buffer}, and return the number of bytes actually read in
+@var{nread}. It may return @code{0} in @var{nread} if no data is
+currently available. To indicate @code{EOF} the function should
+return with an error code of @code{-1} and set @var{nread} to
+@code{0}. The callback function may support to reset its internal
+read pointer if it is invoked with @var{buffer} and @var{nread} being
+@code{NULL} and @var{count} being @code{0}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+data object was successfully created, @code{GPG_ERR_INV_VALUE} if
+@var{dh} or @var{readfunc} is not a valid pointer, and
+@code{GPG_ERR_ENOMEM} if not enough memory is available.
+@end deftypefun
+
+
+@node Destroying Data Buffers
+@section Destroying Data Buffers
+@cindex data buffer, destruction
+
+@deftypefun void gpgme_data_release (@w{gpgme_data_t @var{dh}})
+The function @code{gpgme_data_release} destroys the data object with
+the handle @var{dh}. It releases all associated resources that were
+not provided by the user in the first place.
+@end deftypefun
+
+@deftypefun {char *} gpgme_data_release_and_get_mem (@w{gpgme_data_t @var{dh}}, @w{size_t *@var{length}})
+The function @code{gpgme_data_release_and_get_mem} is like
+@code{gpgme_data_release}, except that it returns the data buffer and
+its length that was provided by the object.
+
+The user has to release the buffer with @code{gpgme_free}. In case
+the user provided the data buffer in non-copy mode, a copy will be
+made for this purpose.
+
+In case an error returns, or there is no suitable data buffer that can
+be returned to the user, the function will return @code{NULL}. In any
+case, the data object @var{dh} is destroyed.
+@end deftypefun
+
+
+@deftypefun void gpgme_free (@w{void *@var{buffer}})
+The function @code{gpgme_free} releases the memory returned by
+@code{gpgme_data_release_and_get_mem}. It should be used instead of
+the system libraries @code{free} function in case different allocators
+are used in a single program.
+@end deftypefun
+
+
+@node Manipulating Data Buffers
+@section Manipulating Data Buffers
+@cindex data buffer, manipulation
+
+Data buffers contain data and meta-data. The following operations can
+be used to manipulate both.
+
+
+@menu
+* Data Buffer I/O Operations:: I/O operations on data buffers.
+* Data Buffer Meta-Data:: Meta-data manipulation of data buffers.
+@end menu
+
+
+@node Data Buffer I/O Operations
+@subsection Data Buffer I/O Operations
+@cindex data buffer, I/O operations
+@cindex data buffer, read
+@cindex data buffer, write
+@cindex data buffer, seek
+
+@deftypefun ssize_t gpgme_data_read (@w{gpgme_data_t @var{dh}}, @w{void *@var{buffer}}, @w{size_t @var{length}})
+The function @code{gpgme_data_read} reads up to @var{length} bytes
+from the data object with the handle @var{dh} into the space starting
+at @var{buffer}.
+
+If no error occurs, the actual amount read is returned. If the end of
+the data object is reached, the function returns 0.
+
+In all other cases, the function returns -1 and sets @var{errno}.
+@end deftypefun
+
+@deftypefun ssize_t gpgme_data_write (@w{gpgme_data_t @var{dh}}, @w{const void *@var{buffer}}, @w{size_t @var{size}})
+The function @code{gpgme_data_write} writes up to @var{size} bytes
+starting from @var{buffer} into the data object with the handle
+@var{dh} at the current write position.
+
+The function returns the number of bytes actually written, or -1 if an
+error occurs. If an error occurs, @var{errno} is set.
+@end deftypefun
+
+@deftypefun off_t gpgme_data_seek (@w{gpgme_data_t @var{dh}}, @w{off_t @var{offset}}, @w{int @var{whence}})
+The function @code{gpgme_data_seek} changes the current read/write
+position.
+
+The @var{whence} argument specifies how the @var{offset} should be
+interpreted. It must be one of the following symbolic constants:
+
+@table @code
+@item SEEK_SET
+Specifies that @var{offset} is a count of characters from the
+beginning of the data object.
+
+@item SEEK_CUR
+Specifies that @var{offset} is a count of characters from the current
+file position. This count may be positive or negative.
+
+@item SEEK_END
+Specifies that @var{offset} is a count of characters from the end of
+the data object. A negative count specifies a position within the
+current extent of the data object; a positive count specifies a
+position past the current end. If you set the position past the
+current end, and actually write data, you will extend the data object
+with zeros up to that position.
+@end table
+
+If successful, the function returns the resulting file position,
+measured in bytes from the beginning of the data object. You can use
+this feature together with @code{SEEK_CUR} to read the current
+read/write position.
+
+If the function fails, -1 is returned and @var{errno} is set.
+@end deftypefun
+
+The following function is deprecated and should not be used. It will
+be removed in a future version of @acronym{GPGME}.
+
+@deftypefun gpgme_error_t gpgme_data_rewind (@w{gpgme_data_t @var{dh}})
+The function @code{gpgme_data_rewind} is equivalent to:
+
+@example
+ return (gpgme_data_seek (dh, 0, SEEK_SET) == -1)
+ ? gpgme_error_from_errno (errno) : 0;
+@end example
+@end deftypefun
+
+
+
+
+@node Data Buffer Meta-Data
+@subsection Data Buffer Meta-Data
+@cindex data buffer, meta-data
+@cindex data buffer, file name
+@cindex data buffer, encoding
+
+@deftypefun {char *} gpgme_data_get_file_name (@w{gpgme_data_t @var{dh}})
+The function @code{gpgme_data_get_file_name} returns a pointer to a
+string containing the file name associated with the data object. The
+file name will be stored in the output when encrypting or signing the
+data and will be returned to the user when decrypting or verifying the
+output data.
+
+If no error occurs, the string containing the file name is returned.
+Otherwise, @code{NULL} will be returned.
+@end deftypefun
+
+
+@deftypefun gpgme_error_t gpgme_data_set_file_name (@w{gpgme_data_t @var{dh}}, @w{const char *@var{file_name}})
+The function @code{gpgme_data_set_file_name} sets the file name
+associated with the data object. The file name will be stored in the
+output when encrypting or signing the data and will be returned to the
+user when decrypting or verifying the output data.
+
+The function returns the error code @code{GPG_ERR_INV_VALUE} if
+@var{dh} is not a valid pointer and @code{GPG_ERR_ENOMEM} if not
+enough memory is available.
+@end deftypefun
+
+
+@deftp {Data type} {enum gpgme_data_encoding_t}
+@tindex gpgme_data_encoding_t
+The @code{gpgme_data_encoding_t} type specifies the encoding of a
+@code{gpgme_data_t} object. For input data objects, the encoding is
+useful to give the backend a hint on the type of data. For output
+data objects, the encoding can specify the output data format on
+certain operations. Please note that not all backends support all
+encodings on all operations. The following data types are available:
+
+@table @code
+@item GPGME_DATA_ENCODING_NONE
+This specifies that the encoding is not known. This is the default
+for a new data object. The backend will try its best to detect the
+encoding automatically.
+
+@item GPGME_DATA_ENCODING_BINARY
+This specifies that the data is encoding in binary form; i.e. there is
+no special encoding.
+
+@item GPGME_DATA_ENCODING_BASE64
+This specifies that the data is encoded using the Base-64 encoding
+scheme as used by @acronym{MIME} and other protocols.
+
+@item GPGME_DATA_ENCODING_ARMOR
+This specifies that the data is encoded in an armored form as used by
+OpenPGP and PEM.
+
+@item GPGME_DATA_ENCODING_URL
+The data is a list of linefeed delimited URLs. This is only useful with
+@code{gpgme_op_import}.
+
+@item GPGME_DATA_ENCODING_URL0
+The data is a list of binary zero delimited URLs. This is only useful
+with @code{gpgme_op_import}.
+
+@item GPGME_DATA_ENCODING_URLESC
+The data is a list of linefeed delimited URLs with all control and space
+characters percent escaped. This mode is is not yet implemented.
+
+@end table
+@end deftp
+
+@deftypefun gpgme_data_encoding_t gpgme_data_get_encoding (@w{gpgme_data_t @var{dh}})
+The function @code{gpgme_data_get_encoding} returns the encoding of
+the data object with the handle @var{dh}. If @var{dh} is not a valid
+pointer (e.g. @code{NULL}) @code{GPGME_DATA_ENCODING_NONE} is
+returned.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_data_set_encoding (@w{gpgme_data_t @var{dh}, gpgme_data_encoding_t @var{enc}})
+The function @code{gpgme_data_set_encoding} changes the encoding of
+the data object with the handle @var{dh} to @var{enc}.
+@end deftypefun
+
+
+@c
+@c Chapter Contexts
+@c
+@node Contexts
+@chapter Contexts
+@cindex context
+
+All cryptographic operations in @acronym{GPGME} are performed within a
+context, which contains the internal state of the operation as well as
+configuration parameters. By using several contexts you can run
+several cryptographic operations in parallel, with different
+configuration.
+
+@deftp {Data type} {gpgme_ctx_t}
+The @code{gpgme_ctx_t} type is a handle for a @acronym{GPGME} context,
+which is used to hold the configuration, status and result of
+cryptographic operations.
+@end deftp
+
+@menu
+* Creating Contexts:: Creating new @acronym{GPGME} contexts.
+* Destroying Contexts:: Releasing @acronym{GPGME} contexts.
+* Result Management:: Managing the result of crypto operations.
+* Context Attributes:: Setting properties of a context.
+* Key Management:: Managing keys with @acronym{GPGME}.
+* Trust Item Management:: Managing trust items with @acronym{GPGME}.
+* Crypto Operations:: Using a context for cryptography.
+* Run Control:: Controlling how operations are run.
+@end menu
+
+
+@node Creating Contexts
+@section Creating Contexts
+@cindex context, creation
+
+@deftypefun gpgme_error_t gpgme_new (@w{gpgme_ctx_t *@var{ctx}})
+The function @code{gpgme_new} creates a new @code{gpgme_ctx_t} object
+and returns a handle for it in @var{ctx}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+context was successfully created, @code{GPG_ERR_INV_VALUE} if
+@var{ctx} is not a valid pointer, and @code{GPG_ERR_ENOMEM} if not
+enough memory is available. Also, it returns
+@code{GPG_ERR_NOT_OPERATIONAL} if @code{gpgme_check_version} was not
+called to initialize GPGME, and @code{GPG_ERR_SELFTEST_FAILED} if a
+selftest failed. Currently, the only selftest is for Windows MingW32
+targets to see if @code{-mms-bitfields} was used (as required).
+@end deftypefun
+
+
+@node Destroying Contexts
+@section Destroying Contexts
+@cindex context, destruction
+
+@deftypefun void gpgme_release (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_release} destroys the context with the handle
+@var{ctx} and releases all associated resources.
+@end deftypefun
+
+
+@node Result Management
+@section Result Management
+@cindex context, result of operation
+
+The detailed result of an operation is returned in operation-specific
+structures such as @code{gpgme_decrypt_result_t}. The corresponding
+retrieval functions such as @code{gpgme_op_decrypt_result} provide
+static access to the results after an operation completes. The
+following interfaces make it possible to detach a result structure
+from its associated context and give it a lifetime beyond that of the
+current operation or context.
+
+@deftypefun void gpgme_result_ref (@w{void *@var{result}})
+The function @code{gpgme_result_ref} acquires an additional reference
+for the result @var{result}, which may be of any type
+@code{gpgme_*_result_t}. As long as the user holds a reference, the
+result structure is guaranteed to be valid and unmodified.
+@end deftypefun
+
+@deftypefun void gpgme_result_unref (@w{void *@var{result}})
+The function @code{gpgme_result_unref} releases a reference for the
+result @var{result}. If this was the last reference, the result
+structure will be destroyed and all resources associated to it will be
+released.
+@end deftypefun
+
+Note that a context may hold its own references to result structures,
+typically until the context is destroyed or the next operation is
+started. In fact, these references are accessed through the
+@code{gpgme_op_*_result} functions.
+
+
+@node Context Attributes
+@section Context Attributes
+@cindex context, attributes
+
+@menu
+* Protocol Selection:: Selecting the protocol used by a context.
+* Crypto Engine:: Configuring the crypto engine.
+* ASCII Armor:: Requesting @acronym{ASCII} armored output.
+* Text Mode:: Choosing canonical text mode.
+* Included Certificates:: Including a number of certificates.
+* Key Listing Mode:: Selecting key listing mode.
+* Passphrase Callback:: Getting the passphrase from the user.
+* Progress Meter Callback:: Being informed about the progress.
+* Locale:: Setting the locale of a context.
+@end menu
+
+
+@node Protocol Selection
+@subsection Protocol Selection
+@cindex context, selecting protocol
+@cindex protocol, selecting
+
+@deftypefun gpgme_error_t gpgme_set_protocol (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_protocol_t @var{proto}})
+The function @code{gpgme_set_protocol} sets the protocol used within
+the context @var{ctx} to @var{proto}. All crypto operations will be
+performed by the crypto engine configured for that protocol.
+@xref{Protocols and Engines}.
+
+Setting the protocol with @code{gpgme_set_protocol} does not check if
+the crypto engine for that protocol is available and installed
+correctly. @xref{Engine Version Check}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+protocol could be set successfully, and @code{GPG_ERR_INV_VALUE} if
+@var{protocol} is not a valid protocol.
+@end deftypefun
+
+@deftypefun gpgme_protocol_t gpgme_get_protocol (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_get_protocol} retrieves the protocol currently
+use with the context @var{ctx}.
+@end deftypefun
+
+
+@node Crypto Engine
+@subsection Crypto Engine
+@cindex context, configuring engine
+@cindex engine, configuration per context
+
+The following functions can be used to set and retrieve the
+configuration of the crypto engines of a specific context. The
+default can also be retrieved without any particular context.
+@xref{Engine Information}. The default can also be changed globally.
+@xref{Engine Configuration}.
+
+@deftypefun gpgme_engine_info_t gpgme_ctx_get_engine_info (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_ctx_get_engine_info} returns a linked list of
+engine info structures. Each info structure describes the
+configuration of one configured backend, as used by the context
+@var{ctx}.
+
+The result is valid until the next invocation of
+@code{gpgme_ctx_set_engine_info} for this particular context.
+
+This function can not fail.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_ctx_set_engine_info (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_protocol_t @var{proto}}, @w{const char *@var{file_name}}, @w{const char *@var{home_dir}})
+The function @code{gpgme_ctx_set_engine_info} changes the
+configuration of the crypto engine implementing the protocol
+@var{proto} for the context @var{ctx}.
+
+@var{file_name} is the file name of the executable program
+implementing this protocol, and @var{home_dir} is the directory name
+of the configuration directory for this crypto engine. If
+@var{home_dir} is @code{NULL}, the engine's default will be used.
+
+Currently this function must be used before starting the first crypto
+operation. It is unspecified if and when the changes will take effect
+if the function is called after starting the first operation on the
+context @var{ctx}.
+
+This function returns the error code @code{GPG_ERR_NO_ERROR} if
+successful, or an eror code on failure.
+@end deftypefun
+
+
+@c FIXME: Unfortunately, using @acronym here breaks texi2dvi.
+@node ASCII Armor
+@subsection @acronym{ASCII} Armor
+@cindex context, armor mode
+@cindex @acronym{ASCII} armor
+@cindex armor mode
+
+@deftypefun void gpgme_set_armor (@w{gpgme_ctx_t @var{ctx}}, @w{int @var{yes}})
+The function @code{gpgme_set_armor} specifies if the output should be
+@acronym{ASCII} armored. By default, output is not @acronym{ASCII}
+armored.
+
+@acronym{ASCII} armored output is disabled if @var{yes} is zero, and
+enabled otherwise.
+@end deftypefun
+
+@deftypefun int gpgme_get_armor (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_get_armor} returns 1 if the output is
+@acronym{ASCII} armored, and @code{0} if it is not, or if @var{ctx} is
+not a valid pointer.
+@end deftypefun
+
+
+@node Text Mode
+@subsection Text Mode
+@cindex context, text mode
+@cindex text mode
+@cindex canonical text mode
+
+@deftypefun void gpgme_set_textmode (@w{gpgme_ctx_t @var{ctx}}, @w{int @var{yes}})
+The function @code{gpgme_set_textmode} specifies if canonical text mode
+should be used. By default, text mode is not used.
+
+Text mode is for example used for the RFC2015 signatures; note that
+the updated RFC 3156 mandates that the mail user agent does some
+preparations so that text mode is not needed anymore.
+
+This option is only relevant to the OpenPGP crypto engine, and ignored
+by all other engines.
+
+Canonical text mode is disabled if @var{yes} is zero, and enabled
+otherwise.
+@end deftypefun
+
+@deftypefun int gpgme_get_textmode (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_get_textmode} returns 1 if canonical text
+mode is enabled, and @code{0} if it is not, or if @var{ctx} is not a
+valid pointer.
+@end deftypefun
+
+
+@node Included Certificates
+@subsection Included Certificates
+@cindex certificates, included
+
+@deftypefun void gpgme_set_include_certs (@w{gpgme_ctx_t @var{ctx}}, @w{int @var{nr_of_certs}})
+The function @code{gpgme_set_include_certs} specifies how many
+certificates should be included in an S/MIME signed message. By
+default, only the sender's certificate is included. The possible
+values of @var{nr_of_certs} are:
+
+@table @code
+@item GPGME_INCLUDE_CERTS_DEFAULT
+Fall back to the default of the crypto backend. This is the default
+for GPGME.
+@item -2
+Include all certificates except the root certificate.
+@item -1
+Include all certificates.
+@item 0
+Include no certificates.
+@item 1
+Include the sender's certificate only.
+@item n
+Include the first n certificates of the certificates path, starting
+from the sender's certificate. The number @code{n} must be positive.
+@end table
+
+Values of @var{nr_of_certs} smaller than -2 are undefined.
+
+This option is only relevant to the CMS crypto engine, and ignored by
+all other engines.
+@end deftypefun
+
+@deftypefun int gpgme_get_include_certs (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_get_include_certs} returns the number of
+certificates to include into an S/MIME signed message.
+@end deftypefun
+
+
+@node Key Listing Mode
+@subsection Key Listing Mode
+@cindex key listing mode
+@cindex key listing, mode of
+
+@deftypefun gpgme_error_t gpgme_set_keylist_mode (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_keylist_mode_t @var{mode}})
+The function @code{gpgme_set_keylist_mode} changes the default
+behaviour of the key listing functions. The value in @var{mode} is a
+bitwise-or combination of one or multiple of the following bit values:
+
+@table @code
+@item GPGME_KEYLIST_MODE_LOCAL
+The @code{GPGME_KEYLIST_MODE_LOCAL} symbol specifies that the local
+keyring should be searched for keys in the keylisting operation. This
+is the default.
+
+@item GPGME_KEYLIST_MODE_EXTERN
+The @code{GPGME_KEYLIST_MODE_EXTERN} symbol specifies that an external
+source should be searched for keys in the keylisting operation. The
+type of external source is dependant on the crypto engine used and
+whether it is combined with @code{GPGME_KEYLIST_MODE_LOCAL}. For
+example, it can be a remote keyserver or LDAP certificate server.
+
+@item GPGME_KEYLIST_MODE_SIGS
+The @code{GPGME_KEYLIST_MODE_SIGS} symbol specifies that the key
+signatures should be included in the listed keys.
+
+@item GPGME_KEYLIST_MODE_SIG_NOTATIONS
+The @code{GPGME_KEYLIST_MODE_SIG_NOTATIONS} symbol specifies that the
+signature notations on key signatures should be included in the listed
+keys. This only works if @code{GPGME_KEYLIST_MODE_SIGS} is also
+enabled.
+
+@item GPGME_KEYLIST_MODE_EPHEMERAL
+The @code{GPGME_KEYLIST_MODE_EPHEMERAL} symbol specifies that keys
+flagged as ephemeral are included in the listing.
+
+@item GPGME_KEYLIST_MODE_VALIDATE
+The @code{GPGME_KEYLIST_MODE_VALIDATE} symbol specifies that the
+backend should do key or certificate validation and not just get the
+validity information from an internal cache. This might be an
+expensive operation and is in general not useful. Currently only
+implemented for the S/MIME backend and ignored for other backends.
+
+@end table
+
+At least one of @code{GPGME_KEYLIST_MODE_LOCAL} and
+@code{GPGME_KEYLIST_MODE_EXTERN} must be specified. For future binary
+compatibility, you should get the current mode with
+@code{gpgme_get_keylist_mode} and modify it by setting or clearing the
+appropriate bits, and then using that calculated value in the
+@code{gpgme_set_keylisting_mode} operation. This will leave all other
+bits in the mode value intact (in particular those that are not used
+in the current version of the library).
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+mode could be set correctly, and @code{GPG_ERR_INV_VALUE} if @var{ctx}
+is not a valid pointer or @var{mode} is not a valid mode.
+@end deftypefun
+
+
+@deftypefun gpgme_keylist_mode_t gpgme_get_keylist_mode (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_get_keylist_mode} returns the current key
+listing mode of the context @var{ctx}. This value can then be
+modified and used in a subsequent @code{gpgme_set_keylist_mode}
+operation to only affect the desired bits (and leave all others
+intact).
+
+The function returns 0 if @var{ctx} is not a valid pointer, and the
+current mode otherwise. Note that 0 is not a valid mode value.
+@end deftypefun
+
+
+@node Passphrase Callback
+@subsection Passphrase Callback
+@cindex callback, passphrase
+@cindex passphrase callback
+
+@deftp {Data type} {gpgme_error_t (*gpgme_passphrase_cb_t)(void *@var{hook}, const char *@var{uid_hint}, const char *@var{passphrase_info}, @w{int @var{prev_was_bad}}, @w{int @var{fd}})}
+@tindex gpgme_passphrase_cb_t
+The @code{gpgme_passphrase_cb_t} type is the type of functions usable as
+passphrase callback function.
+
+The argument @var{uid_hint} might contain a string that gives an
+indication for which user ID the passphrase is required. If this is
+not available, or not applicable (in the case of symmetric encryption,
+for example), @var{uid_hint} will be @code{NULL}.
+
+The argument @var{passphrase_info}, if not @code{NULL}, will give
+further information about the context in which the passphrase is
+required. This information is engine and operation specific.
+
+If this is the repeated attempt to get the passphrase, because
+previous attempts failed, then @var{prev_was_bad} is 1, otherwise it
+will be 0.
+
+The user must write the passphrase, followed by a newline character,
+to the file descriptor @var{fd}. If the user returns 0 indicating
+success, the user must at least write a newline character before
+returning from the callback.
+
+If an error occurs, return the corresponding @code{gpgme_error_t}
+value. You can use the error code @code{GPG_ERR_CANCELED} to abort
+the operation. Otherwise, return @code{0}.
+@end deftp
+
+@deftypefun void gpgme_set_passphrase_cb (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_passphrase_cb_t @var{passfunc}}, @w{void *@var{hook_value}})
+The function @code{gpgme_set_passphrase_cb} sets the function that is
+used when a passphrase needs to be provided by the user to
+@var{passfunc}. The function @var{passfunc} needs to implemented by
+the user, and whenever it is called, it is called with its first
+argument being @var{hook_value}. By default, no passphrase callback
+function is set.
+
+Not all crypto engines require this callback to retrieve the
+passphrase. It is better if the engine retrieves the passphrase from
+a trusted agent (a daemon process), rather than having each user to
+implement their own passphrase query. Some engines do not even
+support an external passphrase callback at all, in this case the error
+code @code{GPG_ERR_NOT_SUPPORTED} is returned.
+
+The user can disable the use of a passphrase callback function by
+calling @code{gpgme_set_passphrase_cb} with @var{passfunc} being
+@code{NULL}.
+@end deftypefun
+
+@deftypefun void gpgme_get_passphrase_cb (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_passphrase_cb_t *@var{passfunc}}, @w{void **@var{hook_value}})
+The function @code{gpgme_get_passphrase_cb} returns the function that
+is used when a passphrase needs to be provided by the user in
+@var{*passfunc}, and the first argument for this function in
+@var{*hook_value}. If no passphrase callback is set, or @var{ctx} is
+not a valid pointer, @code{NULL} is returned in both variables.
+
+@var{passfunc} or @var{hook_value} can be @code{NULL}. In this case,
+the corresponding value will not be returned.
+@end deftypefun
+
+
+@node Progress Meter Callback
+@subsection Progress Meter Callback
+@cindex callback, progress meter
+@cindex progress meter callback
+
+@deftp {Data type} {void (*gpgme_progress_cb_t)(void *@var{hook}, const char *@var{what}, int @var{type}, int @var{current}, int @var{total})}
+@tindex gpgme_progress_cb_t
+The @code{gpgme_progress_cb_t} type is the type of functions usable as
+progress callback function.
+
+The arguments are specific to the crypto engine. More information
+about the progress information returned from the GnuPG engine can be
+found in the GnuPG source code in the file @file{doc/DETAILS} in the
+section PROGRESS.
+@end deftp
+
+@deftypefun void gpgme_set_progress_cb (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_progress_cb_t @var{progfunc}}, @w{void *@var{hook_value}})
+The function @code{gpgme_set_progress_cb} sets the function that is
+used when progress information about a cryptographic operation is
+available. The function @var{progfunc} needs to implemented by the
+user, and whenever it is called, it is called with its first argument
+being @var{hook_value}. By default, no progress callback function
+is set.
+
+Setting a callback function allows an interactive program to display
+progress information about a long operation to the user.
+
+The user can disable the use of a progress callback function by
+calling @code{gpgme_set_progress_cb} with @var{progfunc} being
+@code{NULL}.
+@end deftypefun
+
+@deftypefun void gpgme_get_progress_cb (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_progress_cb_t *@var{progfunc}}, @w{void **@var{hook_value}})
+The function @code{gpgme_get_progress_cb} returns the function that is
+used to inform the user about the progress made in @var{*progfunc},
+and the first argument for this function in @var{*hook_value}. If no
+progress callback is set, or @var{ctx} is not a valid pointer,
+@code{NULL} is returned in both variables.
+
+@var{progfunc} or @var{hook_value} can be @code{NULL}. In this case,
+the corresponding value will not be returned.
+@end deftypefun
+
+
+@node Locale
+@subsection Locale
+@cindex locale, default
+@cindex locale, of a context
+
+A locale setting can be associated with a context. This locale is
+passed to the crypto engine, and used for applications like the PIN
+entry, which is displayed to the user when entering a passphrase is
+required.
+
+The default locale is used to initialize the locale setting of all
+contexts created afterwards.
+
+@deftypefun gpgme_error_t gpgme_set_locale (@w{gpgme_ctx_t @var{ctx}}, @w{int @var{category}}, @w{const char *@var{value}})
+The function @code{gpgme_set_locale} sets the locale of the context
+@var{ctx}, or the default locale if @var{ctx} is a null pointer.
+
+The locale settings that should be changed are specified by
+@var{category}. Supported categories are @code{LC_CTYPE},
+@code{LC_MESSAGES}, and @code{LC_ALL}, which is a wildcard you can use
+if you want to change all the categories at once.
+
+The value to be used for the locale setting is @var{value}, which will
+be copied to @acronym{GPGME}'s internal data structures. @var{value}
+can be a null pointer, which disables setting the locale, and will
+make PIN entry and other applications use their default setting, which
+is usually not what you want.
+
+Note that the settings are only used if the application runs on a text
+terminal, and that the settings should fit the configuration of the
+output terminal. Normally, it is sufficient to initialize the default
+value at startup.
+
+The function returns an error if not enough memory is available.
+@end deftypefun
+
+
+@node Key Management
+@section Key Management
+@cindex key management
+
+Some of the cryptographic operations require that recipients or
+signers are specified. This is always done by specifying the
+respective keys that should be used for the operation. The following
+section describes how such keys can be selected and manipulated.
+
+@deftp {Data type} gpgme_sub_key_t
+The @code{gpgme_sub_key_t} type is a pointer to a subkey structure.
+Sub keys are one component of a @code{gpgme_key_t} object. In fact,
+subkeys are those parts that contains the real information about the
+individual cryptographic keys that belong to the same key object. One
+@code{gpgme_key_t} can contain several subkeys. The first subkey in
+the linked list is also called the primary key.
+
+The subkey structure has the following members:
+
+@table @code
+@item gpgme_sub_key_t next
+This is a pointer to the next subkey structure in the linked list, or
+@code{NULL} if this is the last element.
+
+@item unsigned int revoked : 1
+This is true if the subkey is revoked.
+
+@item unsigned int expired : 1
+This is true if the subkey is expired.
+
+@item unsigned int disabled : 1
+This is true if the subkey is disabled.
+
+@item unsigned int invalid : 1
+This is true if the subkey is invalid.
+
+@item unsigned int can_encrypt : 1
+This is true if the subkey can be used for encryption.
+
+@item unsigned int can_sign : 1
+This is true if the subkey can be used to create data signatures.
+
+@item unsigned int can_certify : 1
+This is true if the subkey can be used to create key certificates.
+
+@item unsigned int can_authenticate : 1
+This is true if the subkey can be used for authentication.
+
+@item unsigned int is_qualified : 1
+This is true if the subkey can be used for qualified signatures
+according to local government regulations.
+
+@item unsigned int secret : 1
+This is true if the subkey is a secret key. Note that it will be false
+if the key is actually a stub key; i.e. a secret key operation is
+currently not possible (offline-key).
+
+@item gpgme_pubkey_algo_t pubkey_algo
+This is the public key algorithm supported by this subkey.
+
+@item unsigned int length
+This is the length of the subkey (in bits).
+
+@item char *keyid
+This is the key ID of the subkey in hexadecimal digits.
+
+@item char *fpr
+This is the fingerprint of the subkey in hexadecimal digits, if
+available.
+
+@item long int timestamp
+This is the creation timestamp of the subkey. This is -1 if the
+timestamp is invalid, and 0 if it is not available.
+
+@item long int expires
+This is the expiration timestamp of the subkey, or 0 if the subkey
+does not expire.
+@end table
+@end deftp
+
+@deftp {Data type} gpgme_key_sig_t
+The @code{gpgme_key_sig_t} type is a pointer to a key signature structure.
+Key signatures are one component of a @code{gpgme_key_t} object, and
+validate user IDs on the key.
+
+The signatures on a key are only available if the key was retrieved
+via a listing operation with the @code{GPGME_KEYLIST_MODE_SIGS} mode
+enabled, because it can be expensive to retrieve all signatures of a
+key.
+
+The signature notations on a key signature are only available if the
+key was retrieved via a listing operation with the
+@code{GPGME_KEYLIST_MODE_SIG_NOTATIONS} mode enabled, because it can
+be expensive to retrieve all signature notations.
+
+The key signature structure has the following members:
+
+@table @code
+@item gpgme_key_sig_t next
+This is a pointer to the next key signature structure in the linked
+list, or @code{NULL} if this is the last element.
+
+@item unsigned int revoked : 1
+This is true if the key signature is a revocation signature.
+
+@item unsigned int expired : 1
+This is true if the key signature is expired.
+
+@item unsigned int invalid : 1
+This is true if the key signature is invalid.
+
+@item unsigned int exportable : 1
+This is true if the key signature is exportable.
+
+@item gpgme_pubkey_algo_t pubkey_algo
+This is the public key algorithm used to create the signature.
+
+@item char *keyid
+This is the key ID of the key (in hexadecimal digits) used to create
+the signature.
+
+@item long int timestamp
+This is the creation timestamp of the key signature. This is -1 if
+the timestamp is invalid, and 0 if it is not available.
+
+@item long int expires
+This is the expiration timestamp of the key signature, or 0 if the key
+signature does not expire.
+
+@item gpgme_error_t status
+This is the status of the signature and has the same meaning as the
+member of the same name in a @code{gpgme_signature_t} object.
+
+@item unsigned int sig_class
+This specifies the signature class of the key signature. The meaning
+is specific to the crypto engine.
+
+@item char *uid
+This is the main user ID of the key used to create the signature.
+
+@item char *name
+This is the name component of @code{uid}, if available.
+
+@item char *comment
+This is the comment component of @code{uid}, if available.
+
+@item char *email
+This is the email component of @code{uid}, if available.
+
+@item gpgme_sig_notation_t notations
+This is a linked list with the notation data and policy URLs.
+@end table
+@end deftp
+
+@deftp {Data type} gpgme_user_id_t
+A user ID is a component of a @code{gpgme_key_t} object. One key can
+have many user IDs. The first one in the list is the main (or
+primary) user ID.
+
+The user ID structure has the following members.
+
+@table @code
+@item gpgme_user_id_t next
+This is a pointer to the next user ID structure in the linked list, or
+@code{NULL} if this is the last element.
+
+@item unsigned int revoked : 1
+This is true if the user ID is revoked.
+
+@item unsigned int invalid : 1
+This is true if the user ID is invalid.
+
+@item gpgme_validity_t validity
+This specifies the validity of the user ID.
+
+@item char *uid
+This is the user ID string.
+
+@item char *name
+This is the name component of @code{uid}, if available.
+
+@item char *comment
+This is the comment component of @code{uid}, if available.
+
+@item char *email
+This is the email component of @code{uid}, if available.
+
+@item gpgme_key_sig_t signatures
+This is a linked list with the signatures on this user ID.
+@end table
+@end deftp
+
+@deftp {Data type} gpgme_key_t
+The @code{gpgme_key_t} type is a pointer to a key object. It has the
+following members:
+
+@table @code
+@item gpgme_keylist_mode_t keylist_mode
+The keylist mode that was active when the key was retrieved.
+
+@item unsigned int revoked : 1
+This is true if the key is revoked.
+
+@item unsigned int expired : 1
+This is true if the key is expired.
+
+@item unsigned int disabled : 1
+This is true if the key is disabled.
+
+@item unsigned int invalid : 1
+This is true if the key is invalid. This might have several reasons,
+for a example for the S/MIME backend, it will be set in during key
+listsing if the key could not be validated due to a missing
+certificates or unmatched policies.
+
+@item unsigned int can_encrypt : 1
+This is true if the key (ie one of its subkeys) can be used for
+encryption.
+
+@item unsigned int can_sign : 1
+This is true if the key (ie one of its subkeys) can be used to create
+data signatures.
+
+@item unsigned int can_certify : 1
+This is true if the key (ie one of its subkeys) can be used to create
+key certificates.
+
+@item unsigned int can_authenticate : 1
+This is true if the key (ie one of its subkeys) can be used for
+authentication.
+
+@item unsigned int is_qualified : 1
+This is true if the key can be used for qualified signatures according
+to local government regulations.
+
+@item unsigned int secret : 1
+This is true if the key is a secret key. Note, that this will always be
+true even if the corresponding subkey flag may be false (offline/stub
+keys).
+
+@item gpgme_protocol_t protocol
+This is the protocol supported by this key.
+
+@item char *issuer_serial
+If @code{protocol} is @code{GPGME_PROTOCOL_CMS}, then this is the
+issuer serial.
+
+@item char *issuer_name
+If @code{protocol} is @code{GPGME_PROTOCOL_CMS}, then this is the
+issuer name.
+
+@item char *chain_id
+If @code{protocol} is @code{GPGME_PROTOCOL_CMS}, then this is the
+chain ID, which can be used to built the certificate chain.
+
+@item gpgme_validity_t owner_trust
+If @code{protocol} is @code{GPGME_PROTOCOL_OpenPGP}, then this is the
+owner trust.
+
+@item gpgme_sub_key_t subkeys
+This is a linked list with the subkeys of the key. The first subkey
+in the list is the primary key and usually available.
+
+@item gpgme_user_id_t uids
+This is a linked list with the user IDs of the key. The first user ID
+in the list is the main (or primary) user ID.
+@end table
+@end deftp
+
+@menu
+* Listing Keys:: Browsing the list of available keys.
+* Information About Keys:: Requesting detailed information about keys.
+* Key Signatures:: Listing the signatures on a key.
+* Manipulating Keys:: Operations on keys.
+* Generating Keys:: Creating new key pairs.
+* Exporting Keys:: Retrieving key data from the key ring.
+* Importing Keys:: Adding keys to the key ring.
+* Deleting Keys:: Removing keys from the key ring.
+* Changing Passphrases:: Change the passphrase of a key.
+* Advanced Key Editing:: Advanced key edit operation.
+@end menu
+
+
+@node Listing Keys
+@subsection Listing Keys
+@cindex listing keys
+@cindex key listing
+@cindex key listing, start
+@cindex key ring, list
+@cindex key ring, search
+
+@deftypefun gpgme_error_t gpgme_op_keylist_start (@w{gpgme_ctx_t @var{ctx}}, @w{const char *@var{pattern}}, @w{int @var{secret_only}})
+The function @code{gpgme_op_keylist_start} initiates a key listing
+operation inside the context @var{ctx}. It sets everything up so that
+subsequent invocations of @code{gpgme_op_keylist_next} return the keys
+in the list.
+
+If @var{pattern} is @code{NULL}, all available keys are returned.
+Otherwise, @var{pattern} contains an engine specific expression that
+is used to limit the list to all keys matching the pattern. Note that
+the total length of the pattern is restricted to an engine-specific
+maximum (a couple of hundred characters are usually accepted). The
+pattern should be used to restrict the search to a certain common name
+or user, not to list many specific keys at once by listing their
+fingerprints or key IDs.
+
+If @var{secret_only} is not @code{0}, the list is restricted to secret
+keys only.
+
+The context will be busy until either all keys are received (and
+@code{gpgme_op_keylist_next} returns @code{GPG_ERR_EOF}), or
+@code{gpgme_op_keylist_end} is called to finish the operation.
+
+The function returns the error code @code{GPG_ERR_INV_VALUE} if
+@var{ctx} is not a valid pointer, and passes through any errors that
+are reported by the crypto engine support routines.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_keylist_ext_start (@w{gpgme_ctx_t @var{ctx}}, @w{const char *@var{pattern}[]}, @w{int @var{secret_only}}, @w{int @var{reserved}})
+The function @code{gpgme_op_keylist_ext_start} initiates an extended
+key listing operation inside the context @var{ctx}. It sets
+everything up so that subsequent invocations of
+@code{gpgme_op_keylist_next} return the keys in the list.
+
+If @var{pattern} or @var{*pattern} is @code{NULL}, all available keys
+are returned. Otherwise, @var{pattern} is a @code{NULL} terminated
+array of strings that are used to limit the list to all keys matching
+at least one of the patterns verbatim. Note that the total length of
+all patterns is restricted to an engine-specific maximum (the exact
+limit also depends on the number of patterns and amount of quoting
+required, but a couple of hundred characters are usually accepted).
+Patterns should be used to restrict the search to a certain common
+name or user, not to list many specific keys at once by listing their
+fingerprints or key IDs.
+
+If @var{secret_only} is not @code{0}, the list is restricted to secret
+keys only.
+
+The value of @var{reserved} must be @code{0}.
+
+The context will be busy until either all keys are received (and
+@code{gpgme_op_keylist_next} returns @code{GPG_ERR_EOF}), or
+@code{gpgme_op_keylist_end} is called to finish the operation.
+
+The function returns the error code @code{GPG_ERR_INV_VALUE} if
+@var{ctx} is not a valid pointer, and passes through any errors that
+are reported by the crypto engine support routines.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_keylist_next (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t *@var{r_key}})
+The function @code{gpgme_op_keylist_next} returns the next key in the
+list created by a previous @code{gpgme_op_keylist_start} operation in
+the context @var{ctx}. The key will have one reference for the user.
+@xref{Manipulating Keys}.
+
+This is the only way to get at @code{gpgme_key_t} objects in
+@acronym{GPGME}.
+
+If the last key in the list has already been returned,
+@code{gpgme_op_keylist_next} returns @code{GPG_ERR_EOF}.
+
+The function returns the error code @code{GPG_ERR_INV_VALUE} if
+@var{ctx} or @var{r_key} is not a valid pointer, and
+@code{GPG_ERR_ENOMEM} if there is not enough memory for the operation.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_keylist_end (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_op_keylist_end} ends a pending key list
+operation in the context @var{ctx}.
+
+After the operation completed successfully, the result of the key
+listing operation can be retrieved with
+@code{gpgme_op_keylist_result}.
+
+The function returns the error code @code{GPG_ERR_INV_VALUE} if
+@var{ctx} is not a valid pointer, and @code{GPG_ERR_ENOMEM} if at some
+time during the operation there was not enough memory available.
+@end deftypefun
+
+The following example illustrates how all keys containing a certain
+string (@code{g10code}) can be listed with their key ID and the name
+and e-mail address of the main user ID:
+
+@example
+gpgme_ctx_t ctx;
+gpgme_key_t key;
+gpgme_error_t err = gpgme_new (&ctx);
+
+if (!err)
+ @{
+ err = gpgme_op_keylist_start (ctx, "g10code", 0);
+ while (!err)
+ @{
+ err = gpgme_op_keylist_next (ctx, &key);
+ if (err)
+ break;
+ printf ("%s:", key->subkeys->keyid);
+ if (key->uids && key->uids->name)
+ printf (" %s", key->uids->name);
+ if (key->uids && key->uids->email)
+ printf (" <%s>", key->uids->email);
+ putchar ('\n');
+ gpgme_key_release (key);
+ @}
+ gpgme_release (ctx);
+ @}
+if (gpg_err_code (err) != GPG_ERR_EOF)
+ @{
+ fprintf (stderr, "can not list keys: %s\n", gpgme_strerror (err));
+ exit (1);
+ @}
+@end example
+
+@deftp {Data type} {gpgme_keylist_result_t}
+This is a pointer to a structure used to store the result of a
+@code{gpgme_op_keylist_*} operation. After successfully ending a key
+listing operation, you can retrieve the pointer to the result with
+@code{gpgme_op_keylist_result}. The structure contains the following
+member:
+
+@table @code
+@item unsigned int truncated : 1
+This is true if the crypto backend had to truncate the result, and
+less than the desired keys could be listed.
+@end table
+@end deftp
+
+@deftypefun gpgme_keylist_result_t gpgme_op_keylist_result (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_op_keylist_result} returns a
+@code{gpgme_keylist_result_t} pointer to a structure holding the
+result of a @code{gpgme_op_keylist_*} operation. The pointer is only
+valid if the last operation on the context was a key listing
+operation, and if this operation finished successfully. The returned
+pointer is only valid until the next operation is started on the
+context.
+@end deftypefun
+
+In a simple program, for which a blocking operation is acceptable, the
+following function can be used to retrieve a single key.
+
+@deftypefun gpgme_error_t gpgme_get_key (@w{gpgme_ctx_t @var{ctx}}, @w{const char *@var{fpr}}, @w{gpgme_key_t *@var{r_key}}, @w{int @var{secret}})
+The function @code{gpgme_get_key} gets the key with the fingerprint
+(or key ID) @var{fpr} from the crypto backend and return it in
+@var{r_key}. If @var{secret} is true, get the secret key. The
+currently active keylist mode is used to retrieve the key. The key
+will have one reference for the user.
+
+If the key is not found in the keyring, @code{gpgme_get_key} returns
+the error code @code{GPG_ERR_EOF} and *@var{r_key} will be set to
+@code{NULL}.
+
+The function returns the error code @code{GPG_ERR_INV_VALUE} if
+@var{ctx} or @var{r_key} is not a valid pointer or @var{fpr} is not a
+fingerprint or key ID, @code{GPG_ERR_AMBIGUOUS_NAME} if the key ID was
+not a unique specifier for a key, and @code{GPG_ERR_ENOMEM} if at some
+time during the operation there was not enough memory available.
+@end deftypefun
+
+
+@node Information About Keys
+@subsection Information About Keys
+@cindex key, information about
+@cindex key, attributes
+@cindex attributes, of a key
+
+Please see the beginning of this section for more information about
+@code{gpgme_key_t} objects.
+
+@deftp {Data type} gpgme_validity_t
+The @code{gpgme_validity_t} type is used to specify the validity of a user ID
+in a key. The following validities are defined:
+
+@table @code
+@item GPGME_VALIDITY_UNKNOWN
+The user ID is of unknown validity. The string representation of this
+validity is ``?''.
+
+@item GPGME_VALIDITY_UNDEFINED
+The validity of the user ID is undefined. The string representation of this
+validity is ``q''.
+
+@item GPGME_VALIDITY_NEVER
+The user ID is never valid. The string representation of this
+validity is ``n''.
+
+@item GPGME_VALIDITY_MARGINAL
+The user ID is marginally valid. The string representation of this
+validity is ``m''.
+
+@item GPGME_VALIDITY_FULL
+The user ID is fully valid. The string representation of this
+validity is ``f''.
+
+@item GPGME_VALIDITY_ULTIMATE
+The user ID is ultimately valid. The string representation of this
+validity is ``u''.
+@end table
+@end deftp
+
+
+The following interfaces are deprecated and only provided for backward
+compatibility. Don't use them. They will be removed in a future
+version of @acronym{GPGME}.
+
+@deftp {Data type} gpgme_attr_t
+The @code{gpgme_attr_t} type is used to specify a key or trust item
+attribute. The following attributes are defined:
+
+@table @code
+@item GPGME_ATTR_KEYID
+This is the key ID of a sub key. It is representable as a string.
+
+For trust items, the trust item refers to the key with this ID.
+
+@item GPGME_ATTR_FPR
+This is the fingerprint of a sub key. It is representable as a
+string.
+
+@item GPGME_ATTR_ALGO
+This is the crypto algorithm for which the sub key can be used. It
+is representable as a string and as a number. The numbers correspond
+to the @code{enum gcry_pk_algos} values in the gcrypt library.
+
+@item GPGME_ATTR_LEN
+This is the key length of a sub key. It is representable as a
+number.
+
+@item GPGME_ATTR_CREATED
+This is the timestamp at creation time of a sub key. It is
+representable as a number.
+
+@item GPGME_ATTR_EXPIRE
+This is the expiration time of a sub key. It is representable as a
+number.
+
+@item GPGME_ATTR_OTRUST
+XXX FIXME (also for trust items)
+
+@item GPGME_ATTR_USERID
+This is a user ID. There can be more than one user IDs in a
+@var{gpgme_key_t} object. The first one (with index 0) is the primary
+user ID. The user ID is representable as a number.
+
+For trust items, this is the user ID associated with this trust item.
+
+@item GPGME_ATTR_NAME
+This is the name belonging to a user ID. It is representable as a string.
+
+@item GPGME_ATTR_EMAIL
+This is the email address belonging to a user ID. It is representable
+as a string.
+
+@item GPGME_ATTR_COMMENT
+This is the comment belonging to a user ID. It is representable as a
+string.
+
+@item GPGME_ATTR_VALIDITY
+This is the validity belonging to a user ID. It is representable as a
+string and as a number. See below for a list of available validities.
+
+For trust items, this is the validity that is associated with this
+trust item.
+
+@item GPGME_ATTR_UID_REVOKED
+This specifies if a user ID is revoked. It is representable as a
+number, and is @code{1} if the user ID is revoked, and @code{0}
+otherwise.
+
+@item GPGME_ATTR_UID_INVALID
+This specifies if a user ID is invalid. It is representable as a
+number, and is @code{1} if the user ID is invalid, and @code{0}
+otherwise.
+
+@item GPGME_ATTR_LEVEL
+This is the trust level of a trust item.
+
+@item GPGME_ATTR_TYPE
+This returns information about the type of key. For the string function
+this will eother be "PGP" or "X.509". The integer function returns 0
+for PGP and 1 for X.509. It is also used for the type of a trust item.
+
+@item GPGME_ATTR_IS_SECRET
+This specifies if the key is a secret key. It is representable as a
+number, and is @code{1} if the key is revoked, and @code{0} otherwise.
+
+@item GPGME_ATTR_KEY_REVOKED
+This specifies if a sub key is revoked. It is representable as a
+number, and is @code{1} if the key is revoked, and @code{0} otherwise.
+
+@item GPGME_ATTR_KEY_INVALID
+This specifies if a sub key is invalid. It is representable as a
+number, and is @code{1} if the key is invalid, and @code{0} otherwise.
+
+@item GPGME_ATTR_KEY_EXPIRED
+This specifies if a sub key is expired. It is representable as a
+number, and is @code{1} if the key is expired, and @code{0} otherwise.
+
+@item GPGME_ATTR_KEY_DISABLED
+This specifies if a sub key is disabled. It is representable as a
+number, and is @code{1} if the key is disabled, and @code{0} otherwise.
+
+@item GPGME_ATTR_KEY_CAPS
+This is a description of the capabilities of a sub key. It is
+representable as a string. The string contains the letter ``e'' if
+the key can be used for encryption, ``s'' if the key can be used for
+signatures, and ``c'' if the key can be used for certifications.
+
+@item GPGME_ATTR_CAN_ENCRYPT
+This specifies if a sub key can be used for encryption. It is
+representable as a number, and is @code{1} if the sub key can be used
+for encryption, and @code{0} otherwise.
+
+@item GPGME_ATTR_CAN_SIGN
+This specifies if a sub key can be used to create data signatures. It
+is representable as a number, and is @code{1} if the sub key can be
+used for signatures, and @code{0} otherwise.
+
+@item GPGME_ATTR_CAN_CERTIFY
+This specifies if a sub key can be used to create key certificates.
+It is representable as a number, and is @code{1} if the sub key can be
+used for certifications, and @code{0} otherwise.
+
+@item GPGME_ATTR_SERIAL
+The X.509 issuer serial attribute of the key. It is representable as
+a string.
+
+@item GPGME_ATTR_ISSUE
+The X.509 issuer name attribute of the key. It is representable as a
+string.
+
+@item GPGME_ATTR_CHAINID
+The X.509 chain ID can be used to build the certification chain. It
+is representable as a string.
+@end table
+@end deftp
+
+@deftypefun {const char *} gpgme_key_get_string_attr (@w{gpgme_key_t @var{key}}, @w{gpgme_attr_t @var{what}}, @w{const void *@var{reserved}}, @w{int @var{idx}})
+The function @code{gpgme_key_get_string_attr} returns the value of the
+string-representable attribute @var{what} of key @var{key}. If the
+attribute is an attribute of a sub key or an user ID, @var{idx}
+specifies the sub key or user ID of which the attribute value is
+returned. The argument @var{reserved} is reserved for later use and
+should be @code{NULL}.
+
+The string returned is only valid as long as the key is valid.
+
+The function returns @code{0} if an attribute can't be returned as a
+string, @var{key} is not a valid pointer, @var{idx} out of range,
+or @var{reserved} not @code{NULL}.
+@end deftypefun
+
+@deftypefun {unsigned long} gpgme_key_get_ulong_attr (@w{gpgme_key_t @var{key}}, @w{gpgme_attr_t @var{what}}, @w{const void *@var{reserved}}, @w{int @var{idx}})
+The function @code{gpgme_key_get_ulong_attr} returns the value of the
+number-representable attribute @var{what} of key @var{key}. If the
+attribute is an attribute of a sub key or an user ID, @var{idx}
+specifies the sub key or user ID of which the attribute value is
+returned. The argument @var{reserved} is reserved for later use and
+should be @code{NULL}.
+
+The function returns @code{0} if the attribute can't be returned as a
+number, @var{key} is not a valid pointer, @var{idx} out of range, or
+@var{reserved} not @code{NULL}.
+@end deftypefun
+
+
+@node Key Signatures
+@subsection Key Signatures
+@cindex key, signatures
+@cindex signatures, on a key
+
+The following interfaces are deprecated and only provided for backward
+compatibility. Don't use them. They will be removed in a future
+version of @acronym{GPGME}.
+
+The signatures on a key are only available if the key was retrieved
+via a listing operation with the @code{GPGME_KEYLIST_MODE_SIGS} mode
+enabled, because it is expensive to retrieve all signatures of a key.
+
+So, before using the below interfaces to retrieve the signatures on a
+key, you have to make sure that the key was listed with signatures
+enabled. One convenient, but blocking, way to do this is to use the
+function @code{gpgme_get_key}.
+
+@deftp {Data type} gpgme_attr_t
+The @code{gpgme_attr_t} type is used to specify a key signature
+attribute. The following attributes are defined:
+
+@table @code
+@item GPGME_ATTR_KEYID
+This is the key ID of the key which was used for the signature. It is
+representable as a string.
+
+@item GPGME_ATTR_ALGO
+This is the crypto algorithm used to create the signature. It is
+representable as a string and as a number. The numbers correspond to
+the @code{enum gcry_pk_algos} values in the gcrypt library.
+
+@item GPGME_ATTR_CREATED
+This is the timestamp at creation time of the signature. It is
+representable as a number.
+
+@item GPGME_ATTR_EXPIRE
+This is the expiration time of the signature. It is representable as
+a number.
+
+@item GPGME_ATTR_USERID
+This is the user ID associated with the signing key. The user ID is
+representable as a number.
+
+@item GPGME_ATTR_NAME
+This is the name belonging to a user ID. It is representable as a string.
+
+@item GPGME_ATTR_EMAIL
+This is the email address belonging to a user ID. It is representable
+as a string.
+
+@item GPGME_ATTR_COMMENT
+This is the comment belonging to a user ID. It is representable as a
+string.
+
+@item GPGME_ATTR_KEY_REVOKED
+This specifies if a key signature is a revocation signature. It is
+representable as a number, and is @code{1} if the key is revoked, and
+@code{0} otherwise.
+
+@c @item GPGME_ATTR_KEY_EXPIRED
+@c This specifies if a key signature is expired. It is representable as
+@c a number, and is @code{1} if the key is revoked, and @code{0}
+@c otherwise.
+@c
+@item GPGME_ATTR_SIG_CLASS
+This specifies the signature class of a key signature. It is
+representable as a number. The meaning is specific to the crypto
+engine.
+
+@item GPGME_ATTR_SIG_CLASS
+This specifies the signature class of a key signature. It is
+representable as a number. The meaning is specific to the crypto
+engine.
+
+@item GPGME_ATTR_SIG_STATUS
+This is the same value as returned by @code{gpgme_get_sig_status}.
+@end table
+@end deftp
+
+@deftypefun {const char *} gpgme_key_sig_get_string_attr (@w{gpgme_key_t @var{key}}, @w{int @var{uid_idx}}, @w{gpgme_attr_t @var{what}}, @w{const void *@var{reserved}}, @w{int @var{idx}})
+The function @code{gpgme_key_sig_get_string_attr} returns the value of
+the string-representable attribute @var{what} of the signature
+@var{idx} on the user ID @var{uid_idx} in the key @var{key}. The
+argument @var{reserved} is reserved for later use and should be
+@code{NULL}.
+
+The string returned is only valid as long as the key is valid.
+
+The function returns @code{0} if an attribute can't be returned as a
+string, @var{key} is not a valid pointer, @var{uid_idx} or @var{idx}
+out of range, or @var{reserved} not @code{NULL}.
+@end deftypefun
+
+@deftypefun {unsigned long} gpgme_key_sig_get_ulong_attr (@w{gpgme_key_t @var{key}}, @w{int @var{uid_idx}}, @w{gpgme_attr_t @var{what}}, @w{const void *@var{reserved}}, @w{int @var{idx}})
+The function @code{gpgme_key_sig_get_ulong_attr} returns the value of
+the number-representable attribute @var{what} of the signature
+@var{idx} on the user ID @var{uid_idx} in the key @var{key}. The
+argument @var{reserved} is reserved for later use and should be
+@code{NULL}.
+
+The function returns @code{0} if an attribute can't be returned as a
+string, @var{key} is not a valid pointer, @var{uid_idx} or @var{idx}
+out of range, or @var{reserved} not @code{NULL}.
+@end deftypefun
+
+
+@node Manipulating Keys
+@subsection Manipulating Keys
+@cindex key, manipulation
+
+@deftypefun void gpgme_key_ref (@w{gpgme_key_t @var{key}})
+The function @code{gpgme_key_ref} acquires an additional reference for
+the key @var{key}.
+@end deftypefun
+
+@deftypefun void gpgme_key_unref (@w{gpgme_key_t @var{key}})
+The function @code{gpgme_key_unref} releases a reference for the key
+@var{key}. If this was the last reference, the key will be destroyed
+and all resources associated to it will be released.
+@end deftypefun
+
+
+The following interface is deprecated and only provided for backward
+compatibility. Don't use it. It will be removed in a future version
+of @acronym{GPGME}.
+
+@deftypefun void gpgme_key_release (@w{gpgme_key_t @var{key}})
+The function @code{gpgme_key_release} is equivalent to
+@code{gpgme_key_unref}.
+@end deftypefun
+
+
+@node Generating Keys
+@subsection Generating Keys
+@cindex key, creation
+@cindex key ring, add
+
+@deftypefun gpgme_error_t gpgme_op_genkey (@w{gpgme_ctx_t @var{ctx}}, @w{const char *@var{parms}}, @w{gpgme_data_t @var{public}}, @w{gpgme_data_t @var{secret}})
+The function @code{gpgme_op_genkey} generates a new key pair in the
+context @var{ctx}. The meaning of @var{public} and @var{secret}
+depends on the crypto backend.
+
+GnuPG does not support @var{public} and @var{secret}, they should be
+@code{NULL}. GnuPG will generate a key pair and add it to the
+standard key ring. The fingerprint of the generated key is available
+with @code{gpgme_op_genkey_result}.
+
+GpgSM requires @var{public} to be a writable data object. GpgSM will
+generate a secret key (which will be stored by @command{gpg-agent},
+and return a certificate request in @var{public}, which then needs to
+be signed by the certification authority and imported before it can be
+used. GpgSM does not make the fingerprint available.
+
+The argument @var{parms} specifies parameters for the key in an XML
+string. The details about the format of @var{parms} are specific to
+the crypto engine used by @var{ctx}. Here is an example for GnuPG as
+the crypto engine (all parameters of OpenPGP key generation are
+documented in the GPG manual):
+
+@example
+<GnupgKeyParms format="internal">
+Key-Type: default
+Subkey-Type: default
+Name-Real: Joe Tester
+Name-Comment: with stupid passphrase
+Name-Email: joe@@foo.bar
+Expire-Date: 0
+Passphrase: abc
+</GnupgKeyParms>
+@end example
+
+Here is an example for GpgSM as the crypto engine (all parameters of
+OpenPGP key generation are documented in the GPGSM manual):
+
+@example
+<GnupgKeyParms format="internal">
+Key-Type: RSA
+Key-Length: 1024
+Name-DN: C=de,O=g10 code,OU=Testlab,CN=Joe 2 Tester
+Name-Email: joe@@foo.bar
+</GnupgKeyParms>
+@end example
+
+Strings should be given in UTF-8 encoding. The only format supported
+for now is ``internal''. The content of the @code{GnupgKeyParms}
+container is passed verbatim to the crypto backend. Control
+statements are not allowed.
+
+After the operation completed successfully, the result can be
+retrieved with @code{gpgme_op_genkey_result}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation could be started successfully, @code{GPG_ERR_INV_VALUE} if
+@var{parms} is not a valid XML string, @code{GPG_ERR_NOT_SUPPORTED} if
+@var{public} or @var{secret} is not valid, and @code{GPG_ERR_GENERAL}
+if no key was created by the backend.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_genkey_start (@w{gpgme_ctx_t @var{ctx}}, @w{const char *@var{parms}}, @w{gpgme_data_t @var{public}}, @w{gpgme_data_t @var{secret}})
+The function @code{gpgme_op_genkey_start} initiates a
+@code{gpgme_op_genkey} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation could be started successfully, @code{GPG_ERR_INV_VALUE} if
+@var{parms} is not a valid XML string, and
+@code{GPG_ERR_NOT_SUPPORTED} if @var{public} or @var{secret} is not
+@code{NULL}.
+@end deftypefun
+
+@deftp {Data type} {gpgme_genkey_result_t}
+This is a pointer to a structure used to store the result of a
+@code{gpgme_op_genkey} operation. After successfully generating a
+key, you can retrieve the pointer to the result with
+@code{gpgme_op_genkey_result}. The structure contains the following
+members:
+
+@table @code
+@item unsigned int primary : 1
+This is a flag that is set to 1 if a primary key was created and to 0
+if not.
+
+@item unsigned int sub : 1
+This is a flag that is set to 1 if a subkey was created and to 0
+if not.
+
+@item char *fpr
+This is the fingerprint of the key that was created. If both a
+primary and a sub key were generated, the fingerprint of the primary
+key will be returned. If the crypto engine does not provide the
+fingerprint, @code{fpr} will be a null pointer.
+@end table
+@end deftp
+
+@deftypefun gpgme_genkey_result_t gpgme_op_genkey_result (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_op_genkey_result} returns a
+@code{gpgme_genkey_result_t} pointer to a structure holding the result of
+a @code{gpgme_op_genkey} operation. The pointer is only valid if the
+last operation on the context was a @code{gpgme_op_genkey} or
+@code{gpgme_op_genkey_start} operation, and if this operation finished
+successfully. The returned pointer is only valid until the next
+operation is started on the context.
+@end deftypefun
+
+
+@node Exporting Keys
+@subsection Exporting Keys
+@cindex key, export
+@cindex key ring, export from
+
+Exporting keys means the same as running @command{gpg} with the command
+@option{--export}. However, a mode flag can be used to change the way
+the export works. The available mode flags are described below, they
+may be or-ed together.
+
+@table @code
+
+@item GPGME_EXPORT_MODE_EXTERN
+If this bit is set, the output is send directly to the default
+keyserver. This is currently only allowed for OpenPGP keys. It is good
+practise to not send more than a few dozens key to a keyserver at one
+time. Using this flag requires that the @var{keydata} argument of the
+export function is set to @code{NULL}.
+
+@item GPGME_EXPORT_MODE_MINIMAL
+If this bit is set, the smallest possible key is exported. For OpenPGP
+keys it removes all signatures except for the latest self-signatures.
+For X.509 keys it has no effect.
+
+
+@end table
+
+
+
+@deftypefun gpgme_error_t gpgme_op_export (@w{gpgme_ctx_t @var{ctx}}, @w{const char *@var{pattern}}, @w{gpgme_export_mode_t @var{mode}}, @w{gpgme_data_t @var{keydata}})
+The function @code{gpgme_op_export} extracts public keys and returns
+them in the data buffer @var{keydata}. The output format of the key
+data returned is determined by the @acronym{ASCII} armor attribute set
+for the context @var{ctx}, or, if that is not set, by the encoding
+specified for @var{keydata}.
+
+If @var{pattern} is @code{NULL}, all available keys are returned.
+Otherwise, @var{pattern} contains an engine specific expression that
+is used to limit the list to all keys matching the pattern.
+
+@var{mode} is usually 0; other values are described above.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation completed successfully, @code{GPG_ERR_INV_VALUE} if
+@var{keydata} is not a valid empty data buffer, and passes through any
+errors that are reported by the crypto engine support routines.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_export_start (@w{gpgme_ctx_t @var{ctx}}, @w{const char *@var{pattern}}, @w{gpgme_export_mode_t @var{mode}}, @w{gpgme_data_t @var{keydata}})
+The function @code{gpgme_op_export_start} initiates a
+@code{gpgme_op_export} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation could be started successfully, and @code{GPG_ERR_INV_VALUE}
+if @var{keydata} is not a valid empty data buffer.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_export_ext (@w{gpgme_ctx_t @var{ctx}}, @w{const char *@var{pattern}[]}, @w{gpgme_export_mode_t @var{mode}}, @w{gpgme_data_t @var{keydata}})
+The function @code{gpgme_op_export} extracts public keys and returns
+them in the data buffer @var{keydata}. The output format of the key
+data returned is determined by the @acronym{ASCII} armor attribute set
+for the context @var{ctx}, or, if that is not set, by the encoding
+specified for @var{keydata}.
+
+If @var{pattern} or @var{*pattern} is @code{NULL}, all available keys
+are returned. Otherwise, @var{pattern} is a @code{NULL} terminated
+array of strings that are used to limit the list to all keys matching
+at least one of the patterns verbatim.
+
+@var{mode} is usually 0; other values are described above.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation completed successfully, @code{GPG_ERR_INV_VALUE} if
+@var{keydata} is not a valid empty data buffer, and passes through any
+errors that are reported by the crypto engine support routines.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_export_ext_start (@w{gpgme_ctx_t @var{ctx}}, @w{const char *@var{pattern}[]}, @w{gpgme_export_mode_t @var{mode}}, @w{gpgme_data_t @var{keydata}})
+The function @code{gpgme_op_export_ext_start} initiates a
+@code{gpgme_op_export_ext} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation could be started successfully, and @code{GPG_ERR_INV_VALUE}
+if @var{keydata} is not a valid empty data buffer.
+@end deftypefun
+
+
+@deftypefun gpgme_error_t gpgme_op_export_keys (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t keys[]}, @w{gpgme_export_mode_t @var{mode}}, @w{gpgme_data_t @var{keydata}})
+The function @code{gpgme_op_export_keys} extracts public keys and returns
+them in the data buffer @var{keydata}. The output format of the key
+data returned is determined by the @acronym{ASCII} armor attribute set
+for the context @var{ctx}, or, if that is not set, by the encoding
+specified for @var{keydata}.
+
+The keys to export are taken form the @code{NULL} terminated array
+@var{keys}. Only keys of the the currently selected protocol of
+@var{ctx} which do have a fingerprint set are considered for export.
+Other keys specified by the @var{keys} are ignored. In particular
+OpenPGP keys retrieved via an external key listing are not included.
+
+@var{mode} is usually 0; other values are described above.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation completed successfully, @code{GPG_ERR_INV_VALUE} if
+@var{keydata} is not a valid empty data buffer, @code{GPG_ERR_NO_DATA}
+if no useful keys are in @var{keys} and passes through any errors that
+are reported by the crypto engine support routines.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_export_keys_start (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t @var{keys}[]}, @w{gpgme_export_mode_t @var{mode}}, @w{gpgme_data_t @var{keydata}})
+The function @code{gpgme_op_export_keys_start} initiates a
+@code{gpgme_op_export_ext} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation could be started successfully, and @code{GPG_ERR_INV_VALUE}
+if @var{keydata} is not a valid empty data buffer, @code{GPG_ERR_NO_DATA}
+if no useful keys are in @var{keys} and passes through any errors that
+are reported by the crypto engine support routines.
+@end deftypefun
+
+
+@node Importing Keys
+@subsection Importing Keys
+@cindex key, import
+@cindex key ring, import to
+
+Importing keys means the same as running @command{gpg} with the command
+@option{--import}.
+
+
+@deftypefun gpgme_error_t gpgme_op_import (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_data_t @var{keydata}})
+The function @code{gpgme_op_import} adds the keys in the data buffer
+@var{keydata} to the key ring of the crypto engine used by @var{ctx}.
+The format of @var{keydata} can be @acronym{ASCII} armored, for example,
+but the details are specific to the crypto engine.
+
+After the operation completed successfully, the result can be
+retrieved with @code{gpgme_op_import_result}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+import was completed successfully, @code{GPG_ERR_INV_VALUE} if
+@var{keydata} if @var{ctx} or @var{keydata} is not a valid pointer,
+and @code{GPG_ERR_NO_DATA} if @var{keydata} is an empty data buffer.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_import_start (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_data_t @var{keydata}})
+The function @code{gpgme_op_import_start} initiates a
+@code{gpgme_op_import} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+import could be started successfully, @code{GPG_ERR_INV_VALUE} if
+@var{keydata} if @var{ctx} or @var{keydata} is not a valid pointer,
+and @code{GPG_ERR_NO_DATA} if @var{keydata} is an empty data buffer.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_import_keys (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t *@var{keys}})
+The function @code{gpgme_op_import_keys} adds the keys described by the
+@code{NULL} terminated array @var{keys} to the key ring of the crypto
+engine used by @var{ctx}. This function is the general interface to
+move a key from one crypto engine to another as long as they are
+compatible. In particular it is used to actually import and make keys
+permanent which have been retrieved from an external source (i.e. using
+@code{GPGME_KEYLIST_MODE_EXTERN}). @footnote{Thus it is a replacement
+for the usual workaround of exporting and then importing a key to make
+an X.509 key permanent.}
+
+Only keys of the the currently selected protocol of @var{ctx} are
+considered for import. Other keys specified by the @var{keys} are
+ignored. As of now all considered keys must have been retrieved using
+the same method, that is the used key listing mode must be identical.
+
+After the operation completed successfully, the result can be
+retrieved with @code{gpgme_op_import_result}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+import was completed successfully, @code{GPG_ERR_INV_VALUE} if
+@var{keydata} if @var{ctx} or @var{keydata} is not a valid pointer,
+@code{GPG_ERR_CONFLICT} if the key listing mode does not match, and
+@code{GPG_ERR_NO_DATA} if no keys are considered for export.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_import_keys_start (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t *@var{keys}})
+The function @code{gpgme_op_import_keys_start} initiates a
+@code{gpgme_op_import_keys} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+import was completed successfully, @code{GPG_ERR_INV_VALUE} if
+@var{keydata} if @var{ctx} or @var{keydata} is not a valid pointer,
+@code{GPG_ERR_CONFLICT} if the key listing mode does not match, and
+@code{GPG_ERR_NO_DATA} if no keys are considered for export.
+@end deftypefun
+
+@deftp {Data type} {gpgme_import_status_t}
+This is a pointer to a structure used to store a part of the result of
+a @code{gpgme_op_import} operation. For each considered key one
+status is added that contains information about the result of the
+import. The structure contains the following members:
+
+@table @code
+@item gpgme_import_status_t next
+This is a pointer to the next status structure in the linked list, or
+@code{NULL} if this is the last element.
+
+@item char *fpr
+This is the fingerprint of the key that was considered.
+
+@item gpgme_error_t result
+If the import was not successful, this is the error value that caused
+the import to fail. Otherwise the error code is
+@code{GPG_ERR_NO_ERROR}.
+
+@item unsigned int status
+This is a bit-wise OR of the following flags that give more
+information about what part of the key was imported. If the key was
+already known, this might be 0.
+
+@table @code
+@item GPGME_IMPORT_NEW
+The key was new.
+
+@item GPGME_IMPORT_UID
+The key contained new user IDs.
+
+@item GPGME_IMPORT_SIG
+The key contained new signatures.
+
+@item GPGME_IMPORT_SUBKEY
+The key contained new sub keys.
+
+@item GPGME_IMPORT_SECRET
+The key contained a secret key.
+@end table
+@end table
+@end deftp
+
+@deftp {Data type} {gpgme_import_result_t}
+This is a pointer to a structure used to store the result of a
+@code{gpgme_op_import} operation. After a successful import
+operation, you can retrieve the pointer to the result with
+@code{gpgme_op_import_result}. The structure contains the following
+members:
+
+@table @code
+@item int considered
+The total number of considered keys.
+
+@item int no_user_id
+The number of keys without user ID.
+
+@item int imported
+The total number of imported keys.
+
+@item imported_rsa
+The number of imported RSA keys.
+
+@item unchanged
+The number of unchanged keys.
+
+@item new_user_ids
+The number of new user IDs.
+
+@item new_sub_keys
+The number of new sub keys.
+
+@item new_signatures
+The number of new signatures.
+
+@item new_revocations
+The number of new revocations.
+
+@item secret_read
+The total number of secret keys read.
+
+@item secret_imported
+The number of imported secret keys.
+
+@item secret_unchanged
+The number of unchanged secret keys.
+
+@item not_imported
+The number of keys not imported.
+
+@item gpgme_import_status_t imports
+A list of gpgme_import_status_t objects which contain more information
+about the keys for which an import was attempted.
+@end table
+@end deftp
+
+@deftypefun gpgme_import_result_t gpgme_op_import_result (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_op_import_result} returns a
+@code{gpgme_import_result_t} pointer to a structure holding the result
+of a @code{gpgme_op_import} operation. The pointer is only valid if
+the last operation on the context was a @code{gpgme_op_import} or
+@code{gpgme_op_import_start} operation, and if this operation finished
+successfully. The returned pointer is only valid until the next
+operation is started on the context.
+@end deftypefun
+
+The following interface is deprecated and only provided for backward
+compatibility. Don't use it. It will be removed in a future version
+of @acronym{GPGME}.
+
+@deftypefun gpgme_error_t gpgme_op_import_ext (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_data_t @var{keydata}}, @w{int *@var{nr}})
+The function @code{gpgme_op_import_ext} is equivalent to:
+
+@example
+ gpgme_error_t err = gpgme_op_import (ctx, keydata);
+ if (!err)
+ @{
+ gpgme_import_result_t result = gpgme_op_import_result (ctx);
+ *nr = result->considered;
+ @}
+@end example
+@end deftypefun
+
+
+@node Deleting Keys
+@subsection Deleting Keys
+@cindex key, delete
+@cindex key ring, delete from
+
+@deftypefun gpgme_error_t gpgme_op_delete (@w{gpgme_ctx_t @var{ctx}}, @w{const gpgme_key_t @var{key}}, @w{int @var{allow_secret}})
+The function @code{gpgme_op_delete} deletes the key @var{key} from the
+key ring of the crypto engine used by @var{ctx}. If
+@var{allow_secret} is @code{0}, only public keys are deleted,
+otherwise secret keys are deleted as well, if that is supported.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the key
+was deleted successfully, @code{GPG_ERR_INV_VALUE} if @var{ctx} or
+@var{key} is not a valid pointer, @code{GPG_ERR_NO_PUBKEY} if
+@var{key} could not be found in the keyring,
+@code{GPG_ERR_AMBIGUOUS_NAME} if the key was not specified
+unambiguously, and @code{GPG_ERR_CONFLICT} if the secret key for
+@var{key} is available, but @var{allow_secret} is zero.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_delete_start (@w{gpgme_ctx_t @var{ctx}}, @w{const gpgme_key_t @var{key}}, @w{int @var{allow_secret}})
+The function @code{gpgme_op_delete_start} initiates a
+@code{gpgme_op_delete} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation was started successfully, and @code{GPG_ERR_INV_VALUE} if
+@var{ctx} or @var{key} is not a valid pointer.
+@end deftypefun
+
+
+@node Changing Passphrases
+@subsection Changing Passphrases
+@cindex passphrase, change
+
+@deftypefun gpgme_error_t gpgme_op_passwd @
+ (@w{gpgme_ctx_t @var{ctx}}, @
+ @w{const gpgme_key_t @var{key}}, @
+ @w{unsigned int @var{flags}})
+
+The function @code{gpgme_op_passwd} changes the passphrase of the
+private key associated with @var{key}. The only allowed value for
+@var{flags} is @code{0}. The backend engine will usually popup a window
+to ask for the old and the new passphrase. Thus this function is not
+useful in a server application (where passphrases are not required
+anyway).
+
+Note that old @code{gpg} engines (before version 2.0.15) do not support
+this command and will silently ignore it.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_passwd_start @
+ (@w{gpgme_ctx_t @var{ctx}}, @
+ @w{const gpgme_key_t @var{key}}, @
+ @w{unsigned int @var{flags}})
+
+The function @code{gpgme_op_passwd_start} initiates a
+@code{gpgme_op_passwd} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns @code{0} if the operation was started successfully,
+and an error code if one of the arguments is not valid or the oepration
+could not be started.
+@end deftypefun
+
+
+@node Advanced Key Editing
+@subsection Advanced Key Editing
+@cindex key, edit
+
+@deftp {Data type} {gpgme_error_t (*gpgme_edit_cb_t) (@w{void *@var{handle}}, @w{gpgme_status_code_t @var{status}}, @w{const char *@var{args}}, @w{int @var{fd}})}
+@tindex gpgme_edit_cb_t
+The @code{gpgme_edit_cb_t} type is the type of functions which
+@acronym{GPGME} calls if it a key edit operation is on-going. The
+status code @var{status} and the argument line @var{args} are passed
+through by @acronym{GPGME} from the crypto engine. The file
+descriptor @var{fd} is -1 for normal status messages. If @var{status}
+indicates a command rather than a status message, the response to the
+command should be written to @var{fd}. The @var{handle} is provided
+by the user at start of operation.
+
+The function should return @code{GPG_ERR_NO_ERROR} or an error value.
+@end deftp
+
+@deftypefun gpgme_error_t gpgme_op_edit (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t @var{key}}, @w{gpgme_edit_cb_t @var{fnc}}, @w{void *@var{handle}}, @w{gpgme_data_t @var{out}})
+The function @code{gpgme_op_edit} processes the key @var{KEY}
+interactively, using the edit callback function @var{FNC} with the
+handle @var{HANDLE}. The callback is invoked for every status and
+command request from the crypto engine. The output of the crypto
+engine is written to the data object @var{out}.
+
+Note that the protocol between the callback function and the crypto
+engine is specific to the crypto engine and no further support in
+implementing this protocol correctly is provided by @acronym{GPGME}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+edit operation completes successfully, @code{GPG_ERR_INV_VALUE} if
+@var{ctx} or @var{key} is not a valid pointer, and any error returned
+by the crypto engine or the edit callback handler.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_edit_start (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t @var{key}}, @w{gpgme_edit_cb_t @var{fnc}}, @w{void *@var{handle}}, @w{gpgme_data_t @var{out}})
+The function @code{gpgme_op_edit_start} initiates a
+@code{gpgme_op_edit} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation was started successfully, and @code{GPG_ERR_INV_VALUE} if
+@var{ctx} or @var{key} is not a valid pointer.
+@end deftypefun
+
+
+@deftypefun gpgme_error_t gpgme_op_card_edit (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t @var{key}}, @w{gpgme_edit_cb_t @var{fnc}}, @w{void *@var{handle}}, @w{gpgme_data_t @var{out}})
+The function @code{gpgme_op_card_edit} is analogous to
+@code{gpgme_op_edit}, but should be used to process the smart card corresponding to the key @var{key}.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_card_edit_start (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t @var{key}}, @w{gpgme_edit_cb_t @var{fnc}}, @w{void *@var{handle}}, @w{gpgme_data_t @var{out}})
+The function @code{gpgme_op_card_edit_start} initiates a
+@code{gpgme_op_card_edit} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation was started successfully, and @code{GPG_ERR_INV_VALUE} if
+@var{ctx} or @var{key} is not a valid pointer.
+@end deftypefun
+
+
+@node Trust Item Management
+@section Trust Item Management
+@cindex trust item
+
+@strong{Caution:} The trust items interface is experimental.
+
+@deftp {Data type} gpgme_trust_item_t
+The @code{gpgme_trust_item_t} type is a pointer to a trust item object.
+It has the following members:
+
+@table @code
+@item char *keyid
+This is a string describing the key to which this trust items belongs.
+
+@item int type
+This is the type of the trust item. A value of 1 refers to a key, a
+value of 2 refers to a user ID.
+
+@item int level
+This is the trust level.
+
+@item char *owner_trust
+The owner trust if @code{type} is 1.
+
+@item char *validity
+The calculated validity.
+
+@item char *name
+The user name if @code{type} is 2.
+@end table
+@end deftp
+
+@menu
+* Listing Trust Items:: Browsing the list of available trust items.
+* Information About Trust Items:: Requesting information about trust items.
+* Manipulating Trust Items:: Operations on trust items.
+@end menu
+
+
+@node Listing Trust Items
+@subsection Listing Trust Items
+@cindex trust item list
+
+@deftypefun gpgme_error_t gpgme_op_trustlist_start (@w{gpgme_ctx_t @var{ctx}}, @w{const char *@var{pattern}}, @w{int @var{max_level}})
+The function @code{gpgme_op_trustlist_start} initiates a trust item
+listing operation inside the context @var{ctx}. It sets everything up
+so that subsequent invocations of @code{gpgme_op_trustlist_next} return
+the trust items in the list.
+
+The string @var{pattern} contains an engine specific expression that
+is used to limit the list to all trust items matching the pattern. It
+can not be the empty string.
+
+The argument @var{max_level} is currently ignored.
+
+The context will be busy until either all trust items are received
+(and @code{gpgme_op_trustlist_next} returns @code{GPG_ERR_EOF}), or
+@code{gpgme_op_trustlist_end} is called to finish the operation.
+
+The function returns the error code @code{GPG_ERR_INV_VALUE} if
+@var{ctx} is not a valid pointer, and passes through any errors that
+are reported by the crypto engine support routines.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_trustlist_next (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_trust_item_t *@var{r_item}})
+The function @code{gpgme_op_trustlist_next} returns the next trust
+item in the list created by a previous @code{gpgme_op_trustlist_start}
+operation in the context @var{ctx}. The trust item can be destroyed
+with @code{gpgme_trust_item_release}. @xref{Manipulating Trust Items}.
+
+This is the only way to get at @code{gpgme_trust_item_t} objects in
+@acronym{GPGME}.
+
+If the last trust item in the list has already been returned,
+@code{gpgme_op_trustlist_next} returns @code{GPG_ERR_EOF}.
+
+The function returns the error code @code{GPG_ERR_INV_VALUE} if @var{ctx} or
+@var{r_item} is not a valid pointer, and @code{GPG_ERR_ENOMEM} if
+there is not enough memory for the operation.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_trustlist_end (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_op_trustlist_end} ends a pending trust list
+operation in the context @var{ctx}.
+
+The function returns the error code @code{GPG_ERR_INV_VALUE} if
+@var{ctx} is not a valid pointer, and @code{GPG_ERR_ENOMEM} if at some
+time during the operation there was not enough memory available.
+@end deftypefun
+
+
+@node Information About Trust Items
+@subsection Information About Trust Items
+@cindex trust item, information about
+@cindex trust item, attributes
+@cindex attributes, of a trust item
+
+The following interfaces are deprecated and only provided for backward
+compatibility. Don't use them. They will be removed in a future
+version of @acronym{GPGME}.
+
+Trust items have attributes which can be queried using the interfaces
+below. The attribute identifiers are shared with those for key
+attributes. @xref{Information About Keys}.
+
+@deftypefun {const char *} gpgme_trust_item_get_string_attr (@w{gpgme_trust_item_t @var{item}}, @w{gpgme_attr_t @var{what}}, @w{const void *@var{reserved}}, @w{int @var{idx}})
+The function @code{gpgme_trust_item_get_string_attr} returns the value
+of the string-representable attribute @var{what} of trust item
+@var{item}. The arguments @var{idx} and @var{reserved} are reserved
+for later use and should be @code{0} and @code{NULL} respectively.
+
+The string returned is only valid as long as the key is valid.
+
+The function returns @code{0} if an attribute can't be returned as a
+string, @var{key} is not a valid pointer, @var{idx} out of range,
+or @var{reserved} not @code{NULL}.
+@end deftypefun
+
+@deftypefun int gpgme_trust_item_get_int_attr (@w{gpgme_trust_item_t @var{item}}, @w{gpgme_attr_t @var{what}}, @w{const void *@var{reserved}}, @w{int @var{idx}})
+The function @code{gpgme_trust_item_get_int_attr} returns the value of
+the number-representable attribute @var{what} of trust item
+@var{item}. If the attribute occurs more than once in the trust item,
+the index is specified by @var{idx}. However, currently no such
+attribute exists, so @var{idx} should be @code{0}. The argument
+@var{reserved} is reserved for later use and should be @code{NULL}.
+
+The function returns @code{0} if the attribute can't be returned as a
+number, @var{key} is not a valid pointer, @var{idx} out of range,
+or @var{reserved} not @code{NULL}.
+@end deftypefun
+
+
+@node Manipulating Trust Items
+@subsection Manipulating Trust Items
+@cindex trust item, manipulation
+
+@deftypefun void gpgme_trust_item_ref (@w{gpgme_trust_item_t @var{item}})
+The function @code{gpgme_trust_item_ref} acquires an additional
+reference for the trust item @var{item}.
+@end deftypefun
+
+@deftypefun void gpgme_trust_item_unref (@w{gpgme_trust_item_t @var{item}})
+The function @code{gpgme_trust_item_unref} releases a reference for
+the trust item @var{item}. If this was the last reference, the trust
+item will be destroyed and all resources associated to it will be
+released.
+@end deftypefun
+
+
+The following interface is deprecated and only provided for backward
+compatibility. Don't use it. It will be removed in a future version
+of @acronym{GPGME}.
+
+@deftypefun void gpgme_trust_item_release (@w{gpgme_trust_item_t @var{item}})
+The function @code{gpgme_trust_item_release} is an alias for
+@code{gpgme_trust_item_unref}.
+@end deftypefun
+
+
+@node Crypto Operations
+@section Crypto Operations
+@cindex cryptographic operation
+
+Sometimes, the result of a crypto operation returns a list of invalid
+keys encountered in processing the request. The following structure
+is used to hold information about such a key.
+
+@deftp {Data type} {gpgme_invalid_key_t}
+This is a pointer to a structure used to store a part of the result of
+a crypto operation which takes user IDs as one input parameter. The
+structure contains the following members:
+
+@table @code
+@item gpgme_invalid_key_t next
+This is a pointer to the next invalid key structure in the linked
+list, or @code{NULL} if this is the last element.
+
+@item char *fpr
+The fingerprint or key ID of the invalid key encountered.
+
+@item gpgme_error_t reason
+An error code describing the reason why the key was found invalid.
+@end table
+@end deftp
+
+
+@menu
+* Decrypt:: Decrypting a ciphertext.
+* Verify:: Verifying a signature.
+* Decrypt and Verify:: Decrypting a signed ciphertext.
+* Sign:: Creating a signature.
+* Encrypt:: Encrypting a plaintext.
+@end menu
+
+
+@node Decrypt
+@subsection Decrypt
+@cindex decryption
+@cindex cryptographic operation, decryption
+
+@deftypefun gpgme_error_t gpgme_op_decrypt (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_data_t @var{cipher}}, @w{gpgme_data_t @var{plain}})
+The function @code{gpgme_op_decrypt} decrypts the ciphertext in the
+data object @var{cipher} and stores it into the data object
+@var{plain}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+ciphertext could be decrypted successfully, @code{GPG_ERR_INV_VALUE}
+if @var{ctx}, @var{cipher} or @var{plain} is not a valid pointer,
+@code{GPG_ERR_NO_DATA} if @var{cipher} does not contain any data to
+decrypt, @code{GPG_ERR_DECRYPT_FAILED} if @var{cipher} is not a valid
+cipher text, @code{GPG_ERR_BAD_PASSPHRASE} if the passphrase for the
+secret key could not be retrieved, and passes through any errors that
+are reported by the crypto engine support routines.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_decrypt_start (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_data_t @var{cipher}}, @w{gpgme_data_t @var{plain}})
+The function @code{gpgme_op_decrypt_start} initiates a
+@code{gpgme_op_decrypt} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation could be started successfully, and @code{GPG_ERR_INV_VALUE}
+if @var{cipher} or @var{plain} is not a valid pointer.
+@end deftypefun
+
+@deftp {Data type} {gpgme_recipient_t}
+This is a pointer to a structure used to store information about the
+recipient of an encrypted text which is decrypted in a
+@code{gpgme_op_decrypt} operation. This information (except for the
+status field) is even available before the operation finished
+successfully, for example in a passphrase callback. The structure
+contains the following members:
+
+@table @code
+@item gpgme_recipient_t next
+This is a pointer to the next recipient structure in the linked list,
+or @code{NULL} if this is the last element.
+
+@item gpgme_pubkey_algo_t
+The public key algorithm used in the encryption.
+
+@item unsigned int wrong_key_usage : 1
+This is true if the key was not used according to its policy.
+
+@item char *keyid
+This is the key ID of the key (in hexadecimal digits) used as
+recipient.
+
+@item gpgme_error_t status
+This is an error number with the error code GPG_ERR_NO_SECKEY if the
+secret key for this recipient is not available, and 0 otherwise.
+@end table
+@end deftp
+
+@deftp {Data type} {gpgme_decrypt_result_t}
+This is a pointer to a structure used to store the result of a
+@code{gpgme_op_decrypt} operation. After successfully decrypting
+data, you can retrieve the pointer to the result with
+@code{gpgme_op_decrypt_result}. The structure contains the following
+members:
+
+@table @code
+@item char *unsupported_algorithm
+If an unsupported algorithm was encountered, this string describes the
+algorithm that is not supported.
+
+@item unsigned int wrong_key_usage : 1
+This is true if the key was not used according to its policy.
+
+@item gpgme_recipient_t recipients
+This is a linked list of recipients to which this message was encrypted.
+
+@item char *file_name
+This is the filename of the original plaintext message file if it is
+known, otherwise this is a null pointer.
+@end table
+@end deftp
+
+@deftypefun gpgme_decrypt_result_t gpgme_op_decrypt_result (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_op_decrypt_result} returns a
+@code{gpgme_decrypt_result_t} pointer to a structure holding the
+result of a @code{gpgme_op_decrypt} operation. The pointer is only
+valid if the last operation on the context was a
+@code{gpgme_op_decrypt} or @code{gpgme_op_decrypt_start} operation.
+If the operation failed this might be a @code{NULL} pointer. The
+returned pointer is only valid until the next operation is started on
+the context.
+@end deftypefun
+
+
+@node Verify
+@subsection Verify
+@cindex verification
+@cindex signature, verification
+@cindex cryptographic operation, verification
+@cindex cryptographic operation, signature check
+@cindex signature notation data
+@cindex notation data
+
+@deftypefun gpgme_error_t gpgme_op_verify (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_data_t @var{sig}}, @w{gpgme_data_t @var{signed_text}}, @w{gpgme_data_t @var{plain}})
+The function @code{gpgme_op_verify} verifies that the signature in the
+data object @var{sig} is a valid signature. If @var{sig} is a
+detached signature, then the signed text should be provided in
+@var{signed_text} and @var{plain} should be a null pointer.
+Otherwise, if @var{sig} is a normal (or cleartext) signature,
+@var{signed_text} should be a null pointer and @var{plain} should be a
+writable data object that will contain the plaintext after successful
+verification.
+
+The results of the individual signature verifications can be retrieved
+with @code{gpgme_op_verify_result}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation could be completed successfully, @code{GPG_ERR_INV_VALUE} if
+@var{ctx}, @var{sig} or @var{plain} is not a valid pointer,
+@code{GPG_ERR_NO_DATA} if @var{sig} does not contain any data to
+verify, and passes through any errors that are reported by the crypto
+engine support routines.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_verify_start (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_data_t @var{sig}}, @w{gpgme_data_t @var{signed_text}}, @w{gpgme_data_t @var{plain}})
+The function @code{gpgme_op_verify_start} initiates a
+@code{gpgme_op_verify} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation could be started successfully, @code{GPG_ERR_INV_VALUE} if
+@var{ctx}, @var{sig} or @var{plain} is not a valid pointer, and
+@code{GPG_ERR_NO_DATA} if @var{sig} or @var{plain} does not contain
+any data to verify.
+@end deftypefun
+
+@deftp {Data type} {gpgme_sig_notation_t}
+This is a pointer to a structure used to store a part of the result of
+a @code{gpgme_op_verify} operation. The structure contains the
+following members:
+
+@table @code
+@item gpgme_sig_notation_t next
+This is a pointer to the next new signature notation structure in the
+linked list, or @code{NULL} if this is the last element.
+
+@item char *name
+The name of the notation field. If this is @code{NULL}, then the
+member @code{value} will contain a policy URL.
+
+@item int name_len
+The length of the @code{name} field. For strings the length is
+counted without the trailing binary zero.
+
+@item char *value
+The value of the notation field. If @code{name} is @code{NULL}, then
+this is a policy URL.
+
+@item int value_len
+The length of the @code{value} field. For strings the length is
+counted without the trailing binary zero.
+
+@item gpgme_sig_notation_flags_t flags
+The accumulated flags field. This field contains the flags associated
+with the notation data in an accumulated form which can be used as an
+argument to the function @code{gpgme_sig_notation_add}. The value
+@code{flags} is a bitwise-or combination of one or multiple of the
+following bit values:
+
+@table @code
+@item GPGME_SIG_NOTATION_HUMAN_READABLE
+The @code{GPGME_SIG_NOTATION_HUMAN_READABLE} symbol specifies that the
+notation data is in human readable form
+
+@item GPGME_SIG_NOTATION_CRITICAL
+The @code{GPGME_SIG_NOTATION_CRITICAL} symbol specifies that the
+notation data is critical.
+
+@end table
+
+@item unsigned int human_readable : 1
+This is true if the @code{GPGME_SIG_NOTATION_HUMAN_READABLE} flag is
+set and false otherwise. This flag is only valid for notation data,
+not for policy URLs.
+
+@item unsigned int critical : 1
+This is true if the @code{GPGME_SIG_NOTATION_CRITICAL} flag is set and
+false otherwise. This flag is valid for notation data and policy URLs.
+
+@end table
+@end deftp
+
+@deftp {Data type} {gpgme_signature_t}
+This is a pointer to a structure used to store a part of the result of
+a @code{gpgme_op_verify} operation. The structure contains the
+following members:
+
+@table @code
+@item gpgme_signature_t next
+This is a pointer to the next new signature structure in the linked
+list, or @code{NULL} if this is the last element.
+
+@item gpgme_sigsum_t summary
+This is a bit vector giving a summary of the signature status. It
+provides an easy interface to a defined semantic of the signature
+status. Checking just one bit is sufficient to see whether a
+signature is valid without any restrictions.
+
+The defined bits are:
+ @table @code
+ @item GPGME_SIGSUM_VALID
+ The signature is fully valid.
+
+ @item GPGME_SIGSUM_GREEN
+ The signature is good but one might want to display some extra
+ information. Check the other bits.
+
+ @item GPGME_SIGSUM_RED
+ The signature is bad. It might be useful to check other bits and
+ display more information, i.e. a revoked certificate might not render a
+ signature invalid when the message was received prior to the cause for
+ the revocation.
+
+ @item GPGME_SIGSUM_KEY_REVOKED
+ The key or at least one certificate has been revoked.
+
+ @item GPGME_SIGSUM_KEY_EXPIRED
+ The key or one of the certificates has expired. It is probably a good
+ idea to display the date of the expiration.
+
+ @item GPGME_SIGSUM_SIG_EXPIRED
+ The signature has expired.
+
+ @item GPGME_SIGSUM_KEY_MISSING
+ Can't verify due to a missing key or certificate.
+
+ @item GPGME_SIGSUM_CRL_MISSING
+ The CRL (or an equivalent mechanism) is not available.
+
+ @item GPGME_SIGSUM_CRL_TOO_OLD
+ Available CRL is too old.
+
+ @item GPGME_SIGSUM_BAD_POLICY
+ A policy requirement was not met.
+
+ @item GPGME_SIGSUM_SYS_ERROR
+ A system error occured.
+ @end table
+
+@item char *fpr
+This is the fingerprint or key ID of the signature.
+
+@item gpgme_error_t status
+This is the status of the signature. In particular, the following
+status codes are of interest:
+
+ @table @code
+ @item GPG_ERR_NO_ERROR
+ This status indicates that the signature is valid. For the combined
+ result this status means that all signatures are valid.
+
+ @item GPG_ERR_SIG_EXPIRED
+ This status indicates that the signature is valid but expired. For
+ the combined result this status means that all signatures are valid
+ and expired.
+
+ @item GPG_ERR_KEY_EXPIRED
+ This status indicates that the signature is valid but the key used to
+ verify the signature has expired. For the combined result this status
+ means that all signatures are valid and all keys are expired.
+
+ @item GPG_ERR_CERT_REVOKED
+ This status indicates that the signature is valid but the key used
+ to verify the signature has been revoked. For the combined result
+ this status means that all signatures are valid and all keys are
+ revoked.
+
+ @item GPG_ERR_BAD_SIGNATURE
+ This status indicates that the signature is invalid. For the combined
+ result this status means that all signatures are invalid.
+
+ @item GPG_ERR_NO_PUBKEY
+ This status indicates that the signature could not be verified due to
+ a missing key. For the combined result this status means that all
+ signatures could not be checked due to missing keys.
+
+ @item GPG_ERR_GENERAL
+ This status indicates that there was some other error which prevented
+ the signature verification.
+ @end table
+
+@item gpgme_sig_notation_t notations
+This is a linked list with the notation data and policy URLs.
+
+@item unsigned long timestamp
+The creation timestamp of this signature.
+
+@item unsigned long exp_timestamp
+The expiration timestamp of this signature, or 0 if the signature does
+not expire.
+
+@item unsigned int wrong_key_usage : 1
+This is true if the key was not used according to its policy.
+
+@item unsigned int pka_trust : 2
+This is set to the trust information gained by means of the PKA system.
+Values are:
+ @table @code
+ @item 0
+ No PKA information available or verification not possible.
+ @item 1
+ PKA verification failed.
+ @item 2
+ PKA verification succeeded.
+ @item 3
+ Reserved for future use.
+ @end table
+Depending on the configuration of the engine, this metric may also be
+reflected by the validity of the signature.
+
+@item unsigned int chain_model : 1
+This is true if the validity of the signature has been checked using the
+chain model. In the chain model the time the signature has been created
+must be within the validity period of the certificate and the time the
+certificate itself has been created must be within the validity period
+of the issuing certificate. In contrast the default validation model
+checks the validity of signature as well at the entire certificate chain
+at the current time.
+
+
+@item gpgme_validity_t validity
+The validity of the signature.
+
+@item gpgme_error_t validity_reason
+If a signature is not valid, this provides a reason why.
+
+@item gpgme_pubkey_algo_t
+The public key algorithm used to create this signature.
+
+@item gpgme_hash_algo_t
+The hash algorithm used to create this signature.
+@end table
+@end deftp
+
+@deftp {Data type} {gpgme_verify_result_t}
+This is a pointer to a structure used to store the result of a
+@code{gpgme_op_verify} operation. After verifying a signature, you
+can retrieve the pointer to the result with
+@code{gpgme_op_verify_result}. If the operation failed this might be
+a @code{NULL} pointer. The structure contains the following member:
+
+@table @code
+@item gpgme_signature_t signatures
+A linked list with information about all signatures for which a
+verification was attempted.
+
+@item char *file_name
+This is the filename of the original plaintext message file if it is
+known, otherwise this is a null pointer.
+@end table
+@end deftp
+
+@deftypefun gpgme_verify_result_t gpgme_op_verify_result (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_op_verify_result} returns a
+@code{gpgme_verify_result_t} pointer to a structure holding the result
+of a @code{gpgme_op_verify} operation. The pointer is only valid if
+the last operation on the context was a @code{gpgme_op_verify},
+@code{gpgme_op_verify_start}, @code{gpgme_op_decrypt_verify} or
+@code{gpgme_op_decrypt_verify_start} operation, and if this operation
+finished successfully (for @code{gpgme_op_decrypt_verify} and
+@code{gpgme_op_decrypt_verify_start}, the error code
+@code{GPG_ERR_NO_DATA} counts as successful in this context). The
+returned pointer is only valid until the next operation is started on
+the context.
+@end deftypefun
+
+
+The following interfaces are deprecated and only provided for backward
+compatibility. Don't use them. They will be removed in a future
+version of @acronym{GPGME}.
+
+@deftp {Data type} {enum gpgme_sig_stat_t}
+@tindex gpgme_sig_stat_t
+The @code{gpgme_sig_stat_t} type holds the result of a signature check, or
+the combined result of all signatures. The following results are
+possible:
+
+@table @code
+@item GPGME_SIG_STAT_NONE
+This status should not occur in normal operation.
+
+@item GPGME_SIG_STAT_GOOD
+This status indicates that the signature is valid. For the combined
+result this status means that all signatures are valid.
+
+@item GPGME_SIG_STAT_GOOD_EXP
+This status indicates that the signature is valid but expired. For
+the combined result this status means that all signatures are valid
+and expired.
+
+@item GPGME_SIG_STAT_GOOD_EXPKEY
+This status indicates that the signature is valid but the key used to
+verify the signature has expired. For the combined result this status
+means that all signatures are valid and all keys are expired.
+
+@item GPGME_SIG_STAT_BAD
+This status indicates that the signature is invalid. For the combined
+result this status means that all signatures are invalid.
+
+@item GPGME_SIG_STAT_NOKEY
+This status indicates that the signature could not be verified due to
+a missing key. For the combined result this status means that all
+signatures could not be checked due to missing keys.
+
+@item GPGME_SIG_STAT_NOSIG
+This status indicates that the signature data provided was not a real
+signature.
+
+@item GPGME_SIG_STAT_ERROR
+This status indicates that there was some other error which prevented
+the signature verification.
+
+@item GPGME_SIG_STAT_DIFF
+For the combined result this status means that at least two signatures
+have a different status. You can get each key's status with
+@code{gpgme_get_sig_status}.
+@end table
+@end deftp
+
+@deftypefun {const char *} gpgme_get_sig_status (@w{gpgme_ctx_t @var{ctx}}, @w{int @var{idx}}, @w{gpgme_sig_stat_t *@var{r_stat}}, @w{time_t *@var{r_created}})
+The function @code{gpgme_get_sig_status} is equivalent to:
+
+@example
+ gpgme_verify_result_t result;
+ gpgme_signature_t sig;
+
+ result = gpgme_op_verify_result (ctx);
+ sig = result->signatures;
+
+ while (sig && idx)
+ @{
+ sig = sig->next;
+ idx--;
+ @}
+ if (!sig || idx)
+ return NULL;
+
+ if (r_stat)
+ @{
+ switch (gpg_err_code (sig->status))
+ @{
+ case GPG_ERR_NO_ERROR:
+ *r_stat = GPGME_SIG_STAT_GOOD;
+ break;
+
+ case GPG_ERR_BAD_SIGNATURE:
+ *r_stat = GPGME_SIG_STAT_BAD;
+ break;
+
+ case GPG_ERR_NO_PUBKEY:
+ *r_stat = GPGME_SIG_STAT_NOKEY;
+ break;
+
+ case GPG_ERR_NO_DATA:
+ *r_stat = GPGME_SIG_STAT_NOSIG;
+ break;
+
+ case GPG_ERR_SIG_EXPIRED:
+ *r_stat = GPGME_SIG_STAT_GOOD_EXP;
+ break;
+
+ case GPG_ERR_KEY_EXPIRED:
+ *r_stat = GPGME_SIG_STAT_GOOD_EXPKEY;
+ break;
+
+ default:
+ *r_stat = GPGME_SIG_STAT_ERROR;
+ break;
+ @}
+ @}
+ if (r_created)
+ *r_created = sig->timestamp;
+ return sig->fpr;
+@end example
+@end deftypefun
+
+@deftypefun {const char *} gpgme_get_sig_string_attr (@w{gpgme_ctx_t @var{ctx}}, @w{int @var{idx}}, @w{gpgme_attr_t @var{what}}, @w{int @var{whatidx}})
+The function @code{gpgme_get_sig_string_attr} is equivalent to:
+
+@example
+ gpgme_verify_result_t result;
+ gpgme_signature_t sig;
+
+ result = gpgme_op_verify_result (ctx);
+ sig = result->signatures;
+
+ while (sig && idx)
+ @{
+ sig = sig->next;
+ idx--;
+ @}
+ if (!sig || idx)
+ return NULL;
+
+ switch (what)
+ @{
+ case GPGME_ATTR_FPR:
+ return sig->fpr;
+
+ case GPGME_ATTR_ERRTOK:
+ if (whatidx == 1)
+ return sig->wrong_key_usage ? "Wrong_Key_Usage" : "";
+ else
+ return "";
+ default:
+ break;
+ @}
+
+ return NULL;
+@end example
+@end deftypefun
+
+@deftypefun {const char *} gpgme_get_sig_ulong_attr (@w{gpgme_ctx_t @var{ctx}}, @w{int @var{idx}}, @w{gpgme_attr_t @var{waht}}, @w{int @var{whatidx}})
+The function @code{gpgme_get_sig_ulong_attr} is equivalent to:
+
+@example
+ gpgme_verify_result_t result;
+ gpgme_signature_t sig;
+
+ result = gpgme_op_verify_result (ctx);
+ sig = result->signatures;
+
+ while (sig && idx)
+ @{
+ sig = sig->next;
+ idx--;
+ @}
+ if (!sig || idx)
+ return 0;
+
+ switch (what)
+ @{
+ case GPGME_ATTR_CREATED:
+ return sig->timestamp;
+
+ case GPGME_ATTR_EXPIRE:
+ return sig->exp_timestamp;
+
+ case GPGME_ATTR_VALIDITY:
+ return (unsigned long) sig->validity;
+
+ case GPGME_ATTR_SIG_STATUS:
+ switch (sig->status)
+ @{
+ case GPG_ERR_NO_ERROR:
+ return GPGME_SIG_STAT_GOOD;
+
+ case GPG_ERR_BAD_SIGNATURE:
+ return GPGME_SIG_STAT_BAD;
+
+ case GPG_ERR_NO_PUBKEY:
+ return GPGME_SIG_STAT_NOKEY;
+
+ case GPG_ERR_NO_DATA:
+ return GPGME_SIG_STAT_NOSIG;
+
+ case GPG_ERR_SIG_EXPIRED:
+ return GPGME_SIG_STAT_GOOD_EXP;
+
+ case GPG_ERR_KEY_EXPIRED:
+ return GPGME_SIG_STAT_GOOD_EXPKEY;
+
+ default:
+ return GPGME_SIG_STAT_ERROR;
+ @}
+
+ case GPGME_ATTR_SIG_SUMMARY:
+ return sig->summary;
+
+ default:
+ break;
+ @}
+ return 0;
+@end example
+@end deftypefun
+
+@deftypefun {const char *} gpgme_get_sig_key (@w{gpgme_ctx_t @var{ctx}}, @w{int @var{idx}}, @w{gpgme_key_t *@var{r_key}})
+The function @code{gpgme_get_sig_key} is equivalent to:
+
+@example
+ gpgme_verify_result_t result;
+ gpgme_signature_t sig;
+
+ result = gpgme_op_verify_result (ctx);
+ sig = result->signatures;
+
+ while (sig && idx)
+ @{
+ sig = sig->next;
+ idx--;
+ @}
+ if (!sig || idx)
+ return gpg_error (GPG_ERR_EOF);
+
+ return gpgme_get_key (ctx, sig->fpr, r_key, 0);
+@end example
+@end deftypefun
+
+
+@node Decrypt and Verify
+@subsection Decrypt and Verify
+@cindex decryption and verification
+@cindex verification and decryption
+@cindex signature check
+@cindex cryptographic operation, decryption and verification
+
+@deftypefun gpgme_error_t gpgme_op_decrypt_verify (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_data_t @var{cipher}}, @w{gpgme_data_t @var{plain}})
+The function @code{gpgme_op_decrypt_verify} decrypts the ciphertext in
+the data object @var{cipher} and stores it into the data object
+@var{plain}. If @var{cipher} contains signatures, they will be
+verified.
+
+After the operation completed, @code{gpgme_op_decrypt_result} and
+@code{gpgme_op_verify_result} can be used to retrieve more information
+about the signatures.
+
+If the error code @code{GPG_ERR_NO_DATA} is returned, @var{cipher}
+does not contain any data to decrypt. However, it might still be
+signed. The information about detected signatures is available with
+@code{gpgme_op_verify_result} in this case.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+ciphertext could be decrypted successfully, @code{GPG_ERR_INV_VALUE}
+if @var{ctx}, @var{cipher} or @var{plain} is not a valid pointer,
+@code{GPG_ERR_NO_DATA} if @var{cipher} does not contain any data to
+decrypt, @code{GPG_ERR_DECRYPT_FAILED} if @var{cipher} is not a valid
+cipher text, @code{GPG_ERR_BAD_PASSPHRASE} if the passphrase for the
+secret key could not be retrieved, and passes through any errors that
+are reported by the crypto engine support routines.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_decrypt_verify (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_data_t @var{cipher}}, @w{gpgme_data_t @var{plain}})
+The function @code{gpgme_op_decrypt_verify_start} initiates a
+@code{gpgme_op_decrypt_verify} operation. It can be completed by
+calling @code{gpgme_wait} on the context. @xref{Waiting For
+Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation could be started successfully, @code{GPG_ERR_INV_VALUE} if
+@var{ctx}, @var{cipher}, @var{plain} or @var{r_stat} is not a valid
+pointer, and @code{GPG_ERR_NO_DATA} if @var{cipher} does not contain
+any data to decrypt.
+@end deftypefun
+
+
+@node Sign
+@subsection Sign
+@cindex signature, creation
+@cindex sign
+@cindex cryptographic operation, signing
+
+A signature can contain signatures by one or more keys. The set of
+keys used to create a signatures is contained in a context, and is
+applied to all following signing operations in this context (until the
+set is changed).
+
+@menu
+* Selecting Signers:: How to choose the keys to sign with.
+* Creating a Signature:: How to create a signature.
+* Signature Notation Data:: How to add notation data to a signature.
+@end menu
+
+
+@node Selecting Signers
+@subsubsection Selecting Signers
+@cindex signature, selecting signers
+@cindex signers, selecting
+
+@deftypefun void gpgme_signers_clear (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_signers_clear} releases a reference for each
+key on the signers list and removes the list of signers from the
+context @var{ctx}.
+
+Every context starts with an empty list.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_signers_add (@w{gpgme_ctx_t @var{ctx}}, @w{const gpgme_key_t @var{key}})
+The function @code{gpgme_signers_add} adds the key @var{key} to the
+list of signers in the context @var{ctx}.
+
+Calling this function acquires an additional reference for the key.
+@end deftypefun
+
+@deftypefun gpgme_key_t gpgme_signers_enum (@w{const gpgme_ctx_t @var{ctx}}, @w{int @var{seq}})
+The function @code{gpgme_signers_enum} returns the @var{seq}th key in
+the list of signers in the context @var{ctx}. An additional reference
+is acquired for the user.
+
+If @var{seq} is out of range, @code{NULL} is returned.
+@end deftypefun
+
+
+@node Creating a Signature
+@subsubsection Creating a Signature
+
+@deftp {Data type} {enum gpgme_sig_mode_t}
+@tindex gpgme_sig_mode_t
+The @code{gpgme_sig_mode_t} type is used to specify the desired type of a
+signature. The following modes are available:
+
+@table @code
+@item GPGME_SIG_MODE_NORMAL
+A normal signature is made, the output includes the plaintext and the
+signature.
+
+@item GPGME_SIG_MODE_DETACH
+A detached signature is made.
+
+@item GPGME_SIG_MODE_CLEAR
+A clear text signature is made. The @acronym{ASCII} armor and text
+mode settings of the context are ignored.
+@end table
+@end deftp
+
+@deftypefun gpgme_error_t gpgme_op_sign (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_data_t @var{plain}}, @w{gpgme_data_t @var{sig}}, @w{gpgme_sig_mode_t @var{mode}})
+The function @code{gpgme_op_sign} creates a signature for the text in
+the data object @var{plain} and returns it in the data object
+@var{sig}. The type of the signature created is determined by the
+@acronym{ASCII} armor (or, if that is not set, by the encoding
+specified for @var{sig}), the text mode attributes set for the context
+@var{ctx} and the requested signature mode @var{mode}.
+
+After the operation completed successfully, the result can be
+retrieved with @code{gpgme_op_sign_result}.
+
+If an S/MIME signed message is created using the CMS crypto engine,
+the number of certificates to include in the message can be specified
+with @code{gpgme_set_include_certs}. @xref{Included Certificates}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+signature could be created successfully, @code{GPG_ERR_INV_VALUE} if
+@var{ctx}, @var{plain} or @var{sig} is not a valid pointer,
+@code{GPG_ERR_NO_DATA} if the signature could not be created,
+@code{GPG_ERR_BAD_PASSPHRASE} if the passphrase for the secret key
+could not be retrieved, @code{GPG_ERR_UNUSABLE_SECKEY} if there are
+invalid signers, and passes through any errors that are reported by the
+crypto engine support routines.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_sign_start (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_data_t @var{plain}}, @w{gpgme_data_t @var{sig}}, @w{gpgme_sig_mode_t @var{mode}})
+The function @code{gpgme_op_sign_start} initiates a
+@code{gpgme_op_sign} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the operation could be
+started successfully, and @code{GPG_ERR_INV_VALUE} if @var{ctx},
+@var{plain} or @var{sig} is not a valid pointer.
+@end deftypefun
+
+@deftp {Data type} {gpgme_new_signature_t}
+This is a pointer to a structure used to store a part of the result of
+a @code{gpgme_op_sign} operation. The structure contains the
+following members:
+
+@table @code
+@item gpgme_new_signature_t next
+This is a pointer to the next new signature structure in the linked
+list, or @code{NULL} if this is the last element.
+
+@item gpgme_sig_mode_t type
+The type of this signature.
+
+@item gpgme_pubkey_algo_t
+The public key algorithm used to create this signature.
+
+@item gpgme_hash_algo_t
+The hash algorithm used to create this signature.
+
+@item unsigned int sig_class
+The signature class of this signature.
+
+@item long int timestamp
+The creation timestamp of this signature.
+
+@item char *fpr
+The fingerprint of the key which was used to create this signature.
+@end table
+@end deftp
+
+@deftp {Data type} {gpgme_sign_result_t}
+This is a pointer to a structure used to store the result of a
+@code{gpgme_op_sign} operation. After successfully generating a
+signature, you can retrieve the pointer to the result with
+@code{gpgme_op_sign_result}. The structure contains the following
+members:
+
+@table @code
+@item gpgme_invalid_key_t invalid_signers
+A linked list with information about all invalid keys for which a
+signature could not be created.
+
+@item gpgme_new_signature_t signatures
+A linked list with information about all signatures created.
+@end table
+@end deftp
+
+@deftypefun gpgme_sign_result_t gpgme_op_sign_result (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_op_sign_result} returns a
+@code{gpgme_sign_result_t} pointer to a structure holding the result
+of a @code{gpgme_op_sign} operation. The pointer is only valid if the
+last operation on the context was a @code{gpgme_op_sign},
+@code{gpgme_op_sign_start}, @code{gpgme_op_encrypt_sign} or
+@code{gpgme_op_encrypt_sign_start} operation. If that operation
+failed, the function might return a @code{NULL} pointer. The returned
+pointer is only valid until the next operation is started on the
+context.
+@end deftypefun
+
+
+@node Signature Notation Data
+@subsubsection Signature Notation Data
+@cindex notation data
+@cindex signature notation data
+@cindex policy URL
+
+Using the following functions, you can attach arbitrary notation data
+to a signature. This information is then available to the user when
+the signature is verified.
+
+@deftypefun void gpgme_sig_notation_clear (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_sig_notation_clear} removes the notation data
+from the context @var{ctx}. Subsequent signing operations from this
+context will not include any notation data.
+
+Every context starts with an empty notation data list.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_sig_notation_add (@w{gpgme_ctx_t @var{ctx}}, @w{const char *@var{name}}, @w{const char *@var{value}}, @w{gpgme_sig_notation_flags_t @var{flags}})
+The function @code{gpgme_sig_notation_add} adds the notation data with
+the name @var{name} and the value @var{value} to the context
+@var{ctx}.
+
+Subsequent signing operations will include this notation data, as well
+as any other notation data that was added since the creation of the
+context or the last @code{gpgme_sig_notation_clear} operation.
+
+The arguments @var{name} and @var{value} must be @code{NUL}-terminated
+strings in human-readable form. The flag
+@code{GPGME_SIG_NOTATION_HUMAN_READABLE} is implied
+(non-human-readable notation data is currently not supported). The
+strings must be in UTF-8 encoding.
+
+If @var{name} is @code{NULL}, then @var{value} should be a policy URL.
+
+The function @code{gpgme_sig_notation_add} returns the error code
+@code{GPG_ERR_NO_ERROR} if the notation data could be added
+successfully, @code{GPG_ERR_INV_VALUE} if @var{ctx} is not a valid
+pointer, or if @var{name}, @var{value} and @var{flags} are an invalid
+combination. The function also passes through any errors that are
+reported by the crypto engine support routines.
+@end deftypefun
+
+@deftypefun gpgme_sig_notation_t gpgme_sig_notation_get (@w{const gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_sig_notation_get} returns the linked list of
+notation data structures that are contained in the context @var{ctx}.
+
+If @var{ctx} is not a valid pointer, or there is no notation data
+added for this context, @code{NULL} is returned.
+@end deftypefun
+
+
+@node Encrypt
+@subsection Encrypt
+@cindex encryption
+@cindex cryptographic operation, encryption
+
+One plaintext can be encrypted for several recipients at the same
+time. The list of recipients is created independently of any context,
+and then passed to the encryption operation.
+
+@menu
+* Encrypting a Plaintext:: How to encrypt a plaintext.
+@end menu
+
+
+@node Encrypting a Plaintext
+@subsubsection Encrypting a Plaintext
+
+@deftypefun gpgme_error_t gpgme_op_encrypt (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t @var{recp}[]}, @w{gpgme_encrypt_flags_t @var{flags}}, @w{gpgme_data_t @var{plain}}, @w{gpgme_data_t @var{cipher}})
+The function @code{gpgme_op_encrypt} encrypts the plaintext in the
+data object @var{plain} for the recipients @var{recp} and stores the
+ciphertext in the data object @var{cipher}. The type of the
+ciphertext created is determined by the @acronym{ASCII} armor (or, if
+that is not set, by the encoding specified for @var{cipher}) and the
+text mode attributes set for the context @var{ctx}.
+
+@var{key} must be a @code{NULL}-terminated array of keys. The user
+must keep references for all keys during the whole duration of the
+call (but see @code{gpgme_op_encrypt_start} for the requirements with
+the asynchronous variant).
+
+The value in @var{flags} is a bitwise-or combination of one or
+multiple of the following bit values:
+
+@table @code
+@item GPGME_ENCRYPT_ALWAYS_TRUST
+The @code{GPGME_ENCRYPT_ALWAYS_TRUST} symbol specifies that all the
+recipients in @var{recp} should be trusted, even if the keys do not
+have a high enough validity in the keyring. This flag should be used
+with care; in general it is not a good idea to use any untrusted keys.
+
+@item GPGME_ENCRYPT_NO_ENCRYPT_TO
+The @code{GPGME_ENCRYPT_NO_ENCRYPT_TO} symbol specifies that no
+default or hidden default recipients as configured in the crypto
+backend should be included. This can be useful for managing different
+user profiles.
+@end table
+
+If @code{GPG_ERR_UNUSABLE_PUBKEY} is returned, some recipients in
+@var{recp} are invalid, but not all. In this case the plaintext might
+be encrypted for all valid recipients and returned in @var{cipher} (if
+this happens depends on the crypto engine). More information about
+the invalid recipients is available with
+@code{gpgme_op_encrypt_result}.
+
+If @var{recp} is @code{NULL}, symmetric rather than public key
+encryption is performed. Symmetrically encrypted cipher text can be
+deciphered with @code{gpgme_op_decrypt}. Note that in this case the
+crypto backend needs to retrieve a passphrase from the user.
+Symmetric encryption is currently only supported for the OpenPGP
+crypto backend.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+ciphertext could be created successfully, @code{GPG_ERR_INV_VALUE} if
+@var{ctx}, @var{recp}, @var{plain} or @var{cipher} is not a valid
+pointer, @code{GPG_ERR_UNUSABLE_PUBKEY} if @var{recp} contains some
+invalid recipients, @code{GPG_ERR_BAD_PASSPHRASE} if the passphrase
+for the symmetric key could not be retrieved, and passes through any
+errors that are reported by the crypto engine support routines.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_encrypt_start (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t @var{recp}[]}, @w{gpgme_encrypt_flags_t @var{flags}}, @w{gpgme_data_t @var{plain}}, @w{gpgme_data_t @var{cipher}})
+The function @code{gpgme_op_encrypt_start} initiates a
+@code{gpgme_op_encrypt} operation. It can be completed by calling
+@code{gpgme_wait} on the context. @xref{Waiting For Completion}.
+
+References to the keys only need to be held for the duration of this
+call. The user can release its references to the keys after this
+function returns, even if the operation is not yet finished.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation could be started successfully, @code{GPG_ERR_INV_VALUE} if
+@var{ctx}, @var{rset}, @var{plain} or @var{cipher} is not a valid
+pointer, and @code{GPG_ERR_UNUSABLE_PUBKEY} if @var{rset} does not
+contain any valid recipients.
+@end deftypefun
+
+@deftp {Data type} {gpgme_encrypt_result_t}
+This is a pointer to a structure used to store the result of a
+@code{gpgme_op_encrypt} operation. After successfully encrypting
+data, you can retrieve the pointer to the result with
+@code{gpgme_op_encrypt_result}. The structure contains the following
+members:
+
+@table @code
+@item gpgme_invalid_key_t invalid_recipients
+A linked list with information about all invalid keys for which
+the data could not be encrypted.
+@end table
+@end deftp
+
+@deftypefun gpgme_encrypt_result_t gpgme_op_encrypt_result (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_op_encrypt_result} returns a
+@code{gpgme_encrypt_result_t} pointer to a structure holding the
+result of a @code{gpgme_op_encrypt} operation. The pointer is only
+valid if the last operation on the context was a
+@code{gpgme_op_encrypt}, @code{gpgme_op_encrypt_start},
+@code{gpgme_op_sign} or @code{gpgme_op_sign_start} operation. If this
+operation failed, this might be a @code{NULL} pointer. The returned
+pointer is only valid until the next operation is started on the
+context.
+@end deftypefun
+
+
+@deftypefun gpgme_error_t gpgme_op_encrypt_sign (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t @var{recp}[]}, @w{gpgme_encrypt_flags_t @var{flags}}, @w{gpgme_data_t @var{plain}}, @w{gpgme_data_t @var{cipher}})
+The function @code{gpgme_op_encrypt_sign} does a combined encrypt and
+sign operation. It is used like @code{gpgme_op_encrypt}, but the
+ciphertext also contains signatures for the signers listed in
+@var{ctx}.
+
+The combined encrypt and sign operation is currently only available
+for the OpenPGP crypto engine.
+@end deftypefun
+
+@deftypefun gpgme_error_t gpgme_op_encrypt_sign_start (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_key_t @var{recp}}, @w{gpgme_encrypt_flags_t @var{flags}}, @w{gpgme_data_t @var{plain}}, @w{gpgme_data_t @var{cipher}})
+The function @code{gpgme_op_encrypt_sign_start} initiates a
+@code{gpgme_op_encrypt_sign} operation. It can be completed by
+calling @code{gpgme_wait} on the context. @xref{Waiting For
+Completion}.
+
+The function returns the error code @code{GPG_ERR_NO_ERROR} if the
+operation could be started successfully, and @code{GPG_ERR_INV_VALUE}
+if @var{ctx}, @var{rset}, @var{plain} or @var{cipher} is not a valid
+pointer.
+@end deftypefun
+
+
+@node Run Control
+@section Run Control
+@cindex run control
+@cindex cryptographic operation, running
+
+@acronym{GPGME} supports running operations synchronously and
+asynchronously. You can use asynchronous operation to set up a
+context up to initiating the desired operation, but delay performing
+it to a later point.
+
+Furthermore, you can use an external event loop to control exactly
+when @acronym{GPGME} runs. This ensures that @acronym{GPGME} only
+runs when necessary and also prevents it from blocking for a long
+time.
+
+@menu
+* Waiting For Completion:: Waiting until an operation is completed.
+* Using External Event Loops:: Advanced control over what happens when.
+* Cancellation:: How to end pending operations prematurely.
+@end menu
+
+
+@node Waiting For Completion
+@subsection Waiting For Completion
+@cindex cryptographic operation, wait for
+@cindex wait for completion
+
+@deftypefun gpgme_ctx_t gpgme_wait (@w{gpgme_ctx_t @var{ctx}}, @w{gpgme_error_t *@var{status}}, @w{int @var{hang}})
+The function @code{gpgme_wait} continues the pending operation within
+the context @var{ctx}. In particular, it ensures the data exchange
+between @acronym{GPGME} and the crypto backend and watches over the
+run time status of the backend process.
+
+If @var{hang} is true, the function does not return until the
+operation is completed or cancelled. Otherwise the function will not
+block for a long time.
+
+The error status of the finished operation is returned in @var{status}
+if @code{gpgme_wait} does not return @code{NULL}.
+
+The @var{ctx} argument can be @code{NULL}. In that case,
+@code{gpgme_wait} waits for any context to complete its operation.
+
+@code{gpgme_wait} can be used only in conjunction with any context
+that has a pending operation initiated with one of the
+@code{gpgme_op_*_start} functions except @code{gpgme_op_keylist_start}
+and @code{gpgme_op_trustlist_start} (for which you should use the
+corresponding @code{gpgme_op_*_next} functions). If @var{ctx} is
+@code{NULL}, all of such contexts are waited upon and possibly
+returned. Synchronous operations running in parallel, as well as key
+and trust item list operations, do not affect @code{gpgme_wait}.
+
+In a multi-threaded environment, only one thread should ever call
+@code{gpgme_wait} at any time, irregardless if @var{ctx} is specified
+or not. This means that all calls to this function should be fully
+synchronized by locking primitives. It is safe to start asynchronous
+operations while a thread is running in @code{gpgme_wait}.
+
+The function returns the @var{ctx} of the context which has finished
+the operation. If @var{hang} is false, and the timeout expires,
+@code{NULL} is returned and @code{*status} will be set to 0. If an
+error occurs, @code{NULL} is returned and the error is returned in
+@code{*status}.
+@end deftypefun
+
+
+@node Using External Event Loops
+@subsection Using External Event Loops
+@cindex event loop, external
+
+@acronym{GPGME} hides the complexity of the communication between the
+library and the crypto engine. The price of this convenience is that
+the calling thread can block arbitrary long waiting for the data
+returned by the crypto engine. In single-threaded programs, in
+particular if they are interactive, this is an unwanted side-effect.
+OTOH, if @code{gpgme_wait} is used without the @var{hang} option being
+enabled, it might be called unnecessarily often, wasting CPU time that
+could be used otherwise.
+
+The I/O callback interface described in this section lets the user
+take control over what happens when. @acronym{GPGME} will provide the
+user with the file descriptors that should be monitored, and the
+callback functions that should be invoked when a file descriptor is
+ready for reading or writing. It is then the user's responsibility to
+decide when to check the file descriptors and when to invoke the
+callback functions. Usually this is done in an event loop, that also
+checks for events in other parts of the program. If the callback
+functions are only called when the file descriptors are ready,
+@acronym{GPGME} will never block. This gives the user more control
+over the program flow, and allows to perform other tasks when
+@acronym{GPGME} would block otherwise.
+
+By using this advanced mechanism, @acronym{GPGME} can be integrated
+smoothly into GUI toolkits like GTK+ even for single-threaded
+programs.
+
+@menu
+* I/O Callback Interface:: How I/O callbacks are registered.
+* Registering I/O Callbacks:: How to use I/O callbacks for a context.
+* I/O Callback Example:: An example how to use I/O callbacks.
+* I/O Callback Example GTK+:: How to use @acronym{GPGME} with GTK+.
+* I/O Callback Example GDK:: How to use @acronym{GPGME} with GDK.
+* I/O Callback Example Qt:: How to use @acronym{GPGME} with Qt.
+@end menu
+
+
+@node I/O Callback Interface
+@subsubsection I/O Callback Interface
+
+@deftp {Data type} {gpgme_error_t (*gpgme_io_cb_t) (@w{void *@var{data}}, @w{int @var{fd}})}
+@tindex gpgme_io_cb_t
+The @code{gpgme_io_cb_t} type is the type of functions which
+@acronym{GPGME} wants to register as I/O callback handlers using the
+@code{gpgme_register_io_cb_t} functions provided by the user.
+
+@var{data} and @var{fd} are provided by @acronym{GPGME} when the I/O
+callback handler is registered, and should be passed through to the
+handler when it is invoked by the user because it noticed activity on
+the file descriptor @var{fd}.
+
+The callback handler always returns @code{0}, but you should consider
+the return value to be reserved for later use.
+@end deftp
+
+@deftp {Data type} {gpgme_error_t (*gpgme_register_io_cb_t) (@w{void *@var{data}}, @w{int @var{fd}}, @w{int @var{dir}}, @w{gpgme_io_cb_t @var{fnc}}, @w{void *@var{fnc_data}}, @w{void **@var{tag}})}
+@tindex gpgme_register_io_cb_t
+The @code{gpgme_register_io_cb_t} type is the type of functions which can
+be called by @acronym{GPGME} to register an I/O callback function
+@var{fnc} for the file descriptor @var{fd} with the user.
+@var{fnc_data} should be passed as the first argument to @var{fnc}
+when the handler is invoked (the second argument should be @var{fd}).
+If @var{dir} is 0, @var{fnc} should be called by the user when
+@var{fd} is ready for writing. If @var{dir} is 1, @var{fnc} should be
+called when @var{fd} is ready for reading.
+
+@var{data} was provided by the user when registering the
+@code{gpgme_register_io_cb_t} function with @acronym{GPGME} and will always
+be passed as the first argument when registering a callback function.
+For example, the user can use this to determine the event loop to
+which the file descriptor should be added.
+
+@acronym{GPGME} will call this function when a crypto operation is
+initiated in a context for which the user has registered I/O callback
+handler functions with @code{gpgme_set_io_cbs}. It can also call this
+function when it is in an I/O callback handler for a file descriptor
+associated to this context.
+
+The user should return a unique handle in @var{tag} identifying this
+I/O callback registration, which will be passed to the
+@code{gpgme_register_io_cb_t} function without interpretation when the file
+descriptor should not be monitored anymore.
+@end deftp
+
+@deftp {Data type} {void (*gpgme_remove_io_cb_t) (@w{void *@var{tag}})}
+The @code{gpgme_remove_io_cb_t} type is the type of functions which can be
+called by @acronym{GPGME} to remove an I/O callback handler that was
+registered before. @var{tag} is the handle that was returned by the
+@code{gpgme_register_io_cb_t} for this I/O callback.
+
+@acronym{GPGME} can call this function when a crypto operation is in
+an I/O callback. It will also call this function when the context is
+destroyed while an operation is pending.
+@end deftp
+
+@deftp {Data type} {enum gpgme_event_io_t}
+@tindex gpgme_event_io_t
+The @code{gpgme_event_io_t} type specifies the type of an event that is
+reported to the user by @acronym{GPGME} as a consequence of an I/O
+operation. The following events are defined:
+
+@table @code
+@item GPGME_EVENT_START
+The operation is fully initialized now, and you can start to run the
+registered I/O callback handlers now. Note that registered I/O
+callback handlers must not be run before this event is signalled.
+@var{type_data} is @code{NULL} and reserved for later use.
+
+@item GPGME_EVENT_DONE
+The operation is finished, the last I/O callback for this operation
+was removed. The accompanying @var{type_data} points to a
+@code{gpgme_error_t} variable that contains the status of the operation
+that finished. This event is signalled after the last I/O callback
+has been removed.
+
+@item GPGME_EVENT_NEXT_KEY
+In a @code{gpgme_op_keylist_start} operation, the next key was
+received from the crypto engine. The accompanying @var{type_data} is
+a @code{gpgme_key_t} variable that contains the key with one reference
+for the user.
+
+@item GPGME_EVENT_NEXT_TRUSTITEM
+In a @code{gpgme_op_trustlist_start} operation, the next trust item
+was received from the crypto engine. The accompanying @var{type_data}
+is a @code{gpgme_trust_item_t} variable that contains the trust item with
+one reference for the user.
+@end table
+@end deftp
+
+@deftp {Data type} {void (*gpgme_event_io_cb_t) (@w{void *@var{data}}, @w{gpgme_event_io_t @var{type}}, @w{void *@var{type_data}})}
+The @code{gpgme_event_io_cb_t} type is the type of functions which can be
+called by @acronym{GPGME} to signal an event for an operation running
+in a context which has I/O callback functions registered by the user.
+
+@var{data} was provided by the user when registering the
+@code{gpgme_event_io_cb_t} function with @acronym{GPGME} and will always be
+passed as the first argument when registering a callback function.
+For example, the user can use this to determine the context in which
+this event has occured.
+
+@var{type} will specify the type of event that has occured.
+@var{type_data} specifies the event further, as described in the above
+list of possible @code{gpgme_event_io_t} types.
+
+@acronym{GPGME} can call this function in an I/O callback handler.
+@end deftp
+
+
+@node Registering I/O Callbacks
+@subsubsection Registering I/O Callbacks
+
+@deftp {Data type} {struct gpgme_io_cb_ts}
+@tindex gpgme_event_io_t
+This structure is used to store the I/O callback interface functions
+described in the previous section. It has the following members:
+
+@table @code
+@item gpgme_register_io_cb_t add
+This is the function called by @acronym{GPGME} to register an I/O
+callback handler. It must be specified.
+
+@item void *add_data
+This is passed as the first argument to the @code{add} function when
+it is called by @acronym{GPGME}. For example, it can be used to
+determine the event loop to which the file descriptor should be added.
+
+@item gpgme_remove_io_cb_t remove
+This is the function called by @acronym{GPGME} to remove an I/O
+callback handler. It must be specified.
+
+@item gpgme_event_io_cb_t event
+This is the function called by @acronym{GPGME} to signal an event for
+an operation. It must be specified, because at least the start event
+must be processed.
+
+@item void *event_data
+This is passed as the first argument to the @code{event} function when
+it is called by @acronym{GPGME}. For example, it can be used to
+determine the context in which the event has occured.
+@end table
+@end deftp
+
+@deftypefun void gpgme_set_io_cbs (@w{gpgme_ctx_t @var{ctx}}, @w{struct gpgme_io_cb_ts *@var{io_cbs}})
+The function @code{gpgme_set_io_cbs} enables the I/O callback
+interface for the context @var{ctx}. The I/O callback functions are
+specified by @var{io_cbs}.
+
+If @var{io_cbs}->@code{add} is @code{NULL}, the I/O callback interface
+is disabled for the context, and normal operation is restored.
+@end deftypefun
+
+@deftypefun void gpgme_get_io_cbs (@w{gpgme_ctx_t @var{ctx}}, @w{struct gpgme_io_cb_ts *@var{io_cbs}})
+The function @code{gpgme_get_io_cbs} returns the I/O callback
+functions set with @code{gpgme_set_io_cbs} in @var{io_cbs}.
+@end deftypefun
+
+
+@node I/O Callback Example
+@subsubsection I/O Callback Example
+
+To actually use an external event loop, you have to implement the I/O
+callback functions that are used by @acronym{GPGME} to register and
+unregister file descriptors. Furthermore, you have to actually
+monitor these file descriptors for activity and call the appropriate
+I/O callbacks.
+
+The following example illustrates how to do that. The example uses
+locking to show in which way the callbacks and the event loop can
+run concurrently. For the event loop, we use a fixed array. For a
+real-world implementation, you should use a dynamically sized
+structure because the number of file descriptors needed for a crypto
+operation in @acronym{GPGME} is not predictable.
+
+@example
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <sys/types.h>
+#include <gpgme.h>
+
+/* The following structure holds the result of a crypto operation. */
+struct op_result
+@{
+ int done;
+ gpgme_error_t err;
+@};
+
+/* The following structure holds the data associated with one I/O
+callback. */
+struct one_fd
+@{
+ int fd;
+ int dir;
+ gpgme_io_cb_t fnc;
+ void *fnc_data;
+ void *loop;
+@};
+
+struct event_loop
+@{
+ pthread_mutex_t lock;
+#define MAX_FDS 32
+ /* Unused slots are marked with FD being -1. */
+ struct one_fd fds[MAX_FDS];
+@};
+@end example
+
+The following functions implement the I/O callback interface.
+
+@example
+gpgme_error_t
+add_io_cb (void *data, int fd, int dir, gpgme_io_cb_t fnc, void *fnc_data,
+ void **r_tag)
+@{
+ struct event_loop *loop = data;
+ struct one_fd *fds = loop->fds;
+ int i;
+
+ pthread_mutex_lock (&loop->lock);
+ for (i = 0; i < MAX_FDS; i++)
+ @{
+ if (fds[i].fd == -1)
+ @{
+ fds[i].fd = fd;
+ fds[i].dir = dir;
+ fds[i].fnc = fnc;
+ fds[i].fnc_data = fnc_data;
+ fds[i].loop = loop;
+ break;
+ @}
+ @}
+ pthread_mutex_unlock (&loop->lock);
+ if (i == MAX_FDS)
+ return gpg_error (GPG_ERR_GENERAL);
+ *r_tag = &fds[i];
+ return 0;
+@}
+
+void
+remove_io_cb (void *tag)
+@{
+ struct one_fd *fd = tag;
+ struct event_loop *loop = fd->loop;
+
+ pthread_mutex_lock (&loop->lock);
+ fd->fd = -1;
+ pthread_mutex_unlock (&loop->lock);
+@}
+
+void
+event_io_cb (void *data, gpgme_event_io_t type, void *type_data)
+@{
+ struct op_result *result = data;
+
+ /* We don't support list operations here. */
+ if (type == GPGME_EVENT_DONE)
+ @{
+ result->done = 1;
+ result->err = *type_data;
+ @}
+@}
+@end example
+
+The final missing piece is the event loop, which will be presented
+next. We only support waiting for the success of a single operation.
+
+@example
+int
+do_select (struct event_loop *loop)
+@{
+ fd_set rfds;
+ fd_set wfds;
+ int i, n;
+ int any = 0;
+ struct one_fd *fdlist = loop->fds;
+
+ pthread_mutex_lock (&loop->lock);
+ FD_ZERO (&rfds);
+ FD_ZERO (&wfds);
+ for (i = 0; i < MAX_FDS; i++)
+ if (fdlist[i].fd != -1)
+ FD_SET (fdlist[i].fd, fdlist[i].dir ? &rfds : &wfds);
+ pthread_mutex_unlock (&loop->unlock);
+
+ do
+ @{
+ n = select (FD_SETSIZE, &rfds, &wfds, NULL, 0);
+ @}
+ while (n < 0 && errno == EINTR);
+
+ if (n < 0)
+ return n; /* Error or timeout. */
+
+ pthread_mutex_lock (&loop->lock);
+ for (i = 0; i < MAX_FDS && n; i++)
+ @{
+ if (fdlist[i].fd != -1)
+ @{
+ if (FD_ISSET (fdlist[i].fd, fdlist[i].dir ? &rfds : &wfds))
+ @{
+ assert (n);
+ n--;
+ any = 1;
+ /* The I/O callback handler can register/remove callbacks,
+ so we have to unlock the file descriptor list. */
+ pthread_mutex_unlock (&loop->lock);
+ (*fdlist[i].fnc) (fdlist[i].fnc_data, fdlist[i].fd);
+ pthread_mutex_lock (&loop->lock);
+ @}
+ @}
+ @}
+ pthread_mutex_unlock (&loop->lock);
+ return any;
+@}
+
+void
+wait_for_op (struct event_loop *loop, struct op_result *result)
+@{
+ int ret;
+
+ do
+ @{
+ ret = do_select (loop);
+ @}
+ while (ret >= 0 && !result->done);
+@}
+@end example
+
+The main function shows how to put it all together.
+
+@example
+int
+main (int argc, char *argv[])
+@{
+ struct event_loop loop;
+ struct op_result result;
+ gpgme_ctx_t ctx;
+ gpgme_error_t err;
+ gpgme_data_t sig, text;
+ int i;
+ struct gpgme_io_cb_ts io_cbs =
+ @{
+ add_io_cb,
+ &loop,
+ remove_io_cb,
+ event_io_cb,
+ &result
+ @};
+
+ init_gpgme (void);
+
+ /* Initialize the loop structure. */
+ pthread_mutex_init (&loop.lock, NULL);
+ for (i = 0; i < MAX_FDS; i++)
+ loop->fds[i].fd = -1;
+
+ /* Initialize the result structure. */
+ result.done = 0;
+
+ err = gpgme_data_new_from_file (&sig, "signature", 1);
+ if (!err)
+ err = gpgme_data_new_from_file (&text, "text", 1);
+ if (!err)
+ err = gpgme_new (&ctx);
+ if (!err)
+ @{
+ gpgme_set_io_cbs (ctx, &io_cbs);
+ err = gpgme_op_verify_start (ctx, sig, text, NULL);
+ @}
+ if (err)
+ @{
+ fprintf (stderr, "gpgme error: %s: %s\n",
+ gpgme_strsource (err), gpgme_strerror (err));
+ exit (1);
+ @}
+
+ wait_for_op (&loop, &result);
+ if (!result.done)
+ @{
+ fprintf (stderr, "select error\n");
+ exit (1);
+ @}
+ if (!result.err)
+ @{
+ fprintf (stderr, "verification failed: %s: %s\n",
+ gpgme_strsource (result.err), gpgme_strerror (result.err));
+ exit (1);
+ @}
+ /* Evaluate verify result. */
+ @dots{}
+ return 0;
+@}
+@end example
+
+
+@node I/O Callback Example GTK+
+@subsubsection I/O Callback Example GTK+
+@cindex GTK+, using @acronym{GPGME} with
+
+The I/O callback interface can be used to integrate @acronym{GPGME}
+with the GTK+ event loop. The following code snippets shows how this
+can be done using the appropriate register and remove I/O callback
+functions. In this example, the private data of the register I/O
+callback function is unused. The event notifications is missing
+because it does not require any GTK+ specific setup.
+
+@example
+#include <gtk/gtk.h>
+
+struct my_gpgme_io_cb
+@{
+ gpgme_io_cb_t fnc;
+ void *fnc_data;
+ guint input_handler_id
+@};
+
+void
+my_gpgme_io_cb (gpointer data, gint source, GdkInputCondition condition)
+@{
+ struct my_gpgme_io_cb *iocb = data;
+ (*(iocb->fnc)) (iocb->data, source);
+@}
+
+void
+my_gpgme_remove_io_cb (void *data)
+@{
+ struct my_gpgme_io_cb *iocb = data;
+ gtk_input_remove (data->input_handler_id);
+@}
+
+void
+my_gpgme_register_io_callback (void *data, int fd, int dir, gpgme_io_cb_t fnc,
+ void *fnc_data, void **tag)
+@{
+ struct my_gpgme_io_cb *iocb = g_malloc (sizeof (struct my_gpgme_io_cb));
+ iocb->fnc = fnc;
+ iocb->data = fnc_data;
+ iocb->input_handler_id = gtk_input_add_full (fd, dir
+ ? GDK_INPUT_READ
+ : GDK_INPUT_WRITE,
+ my_gpgme_io_callback,
+ 0, iocb, NULL);
+ *tag = iocb;
+ return 0;
+@}
+@end example
+
+
+@node I/O Callback Example GDK
+@subsubsection I/O Callback Example GDK
+@cindex GDK, using @acronym{GPGME} with
+
+The I/O callback interface can also be used to integrate
+@acronym{GPGME} with the GDK event loop. The following code snippets
+shows how this can be done using the appropriate register and remove
+I/O callback functions. In this example, the private data of the
+register I/O callback function is unused. The event notifications is
+missing because it does not require any GDK specific setup.
+
+It is very similar to the GTK+ example in the previous section.
+
+@example
+#include <gdk/gdk.h>
+
+struct my_gpgme_io_cb
+@{
+ gpgme_io_cb_t fnc;
+ void *fnc_data;
+ gint tag;
+@};
+
+void
+my_gpgme_io_cb (gpointer data, gint source, GdkInputCondition condition)
+@{
+ struct my_gpgme_io_cb *iocb = data;
+ (*(iocb->fnc)) (iocb->data, source);
+@}
+
+void
+my_gpgme_remove_io_cb (void *data)
+@{
+ struct my_gpgme_io_cb *iocb = data;
+ gdk_input_remove (data->tag);
+@}
+
+void
+my_gpgme_register_io_callback (void *data, int fd, int dir, gpgme_io_cb_t fnc,
+ void *fnc_data, void **tag)
+@{
+ struct my_gpgme_io_cb *iocb = g_malloc (sizeof (struct my_gpgme_io_cb));
+ iocb->fnc = fnc;
+ iocb->data = fnc_data;
+ iocb->tag = gtk_input_add_full (fd, dir ? GDK_INPUT_READ : GDK_INPUT_WRITE,
+ my_gpgme_io_callback, iocb, NULL);
+ *tag = iocb;
+ return 0;
+@}
+@end example
+
+
+@node I/O Callback Example Qt
+@subsubsection I/O Callback Example Qt
+@cindex Qt, using @acronym{GPGME} with
+
+The I/O callback interface can also be used to integrate
+@acronym{GPGME} with the Qt event loop. The following code snippets
+show how this can be done using the appropriate register and remove
+I/O callback functions. In this example, the private data of the
+register I/O callback function is unused. The event notifications is
+missing because it does not require any Qt specific setup.
+
+@example
+#include <qsocketnotifier.h>
+#include <qapplication.h>
+
+struct IOCB @{
+ IOCB( GpgmeIOCb f, void * d, QSocketNotifier * n )
+ : func( f ), data( d ), notifier( n ) @{@}
+ GpgmeIOCb func;
+ void * data;
+ QSocketNotifier * notifier;
+@}
+
+class MyApp : public QApplication @{
+
+ // ...
+
+ static void registerGpgmeIOCallback( void * data, int fd, int dir,
+ GpgmeIOCb func, void * func_data,
+ void ** tag ) @{
+ QSocketNotifier * n =
+ new QSocketNotifier( fd, dir ? QSocketNotifier::Read
+ : QSocketNotifier::Write );
+ connect( n, SIGNAL(activated(int)),
+ qApp, SLOT(slotGpgmeIOCallback(int)) );
+ qApp->mIOCBs.push_back( IOCB( func, func_data, n ) );
+ *tag = (void*)n;
+ @}
+
+ static void removeGpgmeIOCallback( void * tag ) @{
+ if ( !tag ) return;
+ QSocketNotifier * n = static_cast<QSocketNotifier*>( tag );
+ for ( QValueList<IOCB>::iterator it = qApp->mIOCBs.begin() ;
+ it != qApp->mIOCBs.end() ; ++it )
+ if ( it->notifier == n ) @{
+ delete it->notifier;
+ qApp->mIOCBs.erase( it );
+ return;
+ @}
+ @}
+
+public slots:
+ void slotGpgmeIOCallback( int fd ) @{
+ for ( QValueList<IOCB>::const_iterator it = mIOCBs.begin() ;
+ it != mIOCBs.end() ; ++it )
+ if ( it->notifier && it->notifier->socket() == fd )
+ (*(it->func)) ( it->func_data, fd );
+ @}
+
+ // ...
+
+private:
+ QValueList<IOCB> mIOCBs;
+ // ...
+@};
+@end example
+
+
+@node Cancellation
+@subsection Cancellation
+@cindex cryptographic operation, aborting
+@cindex cryptographic operation, cancelling
+@cindex aborting operations
+@cindex cancelling operations
+
+Sometimes you do not want to wait for an operation to finish.
+@acronym{GPGME} provides two different functions to achieve that. The
+function @code{gpgme_cancel} takes effect immediately. When it
+returns, the operation is effectively canceled. However, it has some
+limitations and can not be used with synchronous operations. In
+contrast, the function @code{gpgme_cancel_async} can be used with any
+context and from any thread, but it is not guaranteed to take effect
+immediately. Instead, cancellation occurs at the next possible time
+(typically the next time I/O occurs in the target context).
+
+@deftypefun gpgme_ctx_t gpgme_cancel (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_cancel} attempts to cancel a pending
+operation in the context @var{ctx}. This only works if you use the
+global event loop or your own event loop.
+
+If you use the global event loop, you must not call @code{gpgme_wait}
+or @code{gpgme_wait} during cancellation. After successful
+cancellation, you can call @code{gpgme_wait} (optionally waiting on
+@var{ctx}), and the context @var{ctx} will appear as if it had
+finished with the error code @code{GPG_ERR_CANCEL}.
+
+If you use your an external event loop, you must ensure that no I/O
+callbacks are invoked for this context (for example by halting the
+event loop). On successful cancellation, all registered I/O callbacks
+for this context will be unregistered, and a @code{GPGME_EVENT_DONE}
+event with the error code @code{GPG_ERR_CANCEL} will be signaled.
+
+The function returns an error code if the cancellation failed (in this
+case the state of @var{ctx} is not modified).
+@end deftypefun
+
+
+@deftypefun gpgme_ctx_t gpgme_cancel_async (@w{gpgme_ctx_t @var{ctx}})
+The function @code{gpgme_cancel} attempts to cancel a pending
+operation in the context @var{ctx}. This can be called by any thread
+at any time after starting an operation on the context, but will not
+take effect immediately. The actual cancellation happens at the next
+time GPGME processes I/O in that context.
+
+The function returns an error code if the cancellation failed (in this
+case the state of @var{ctx} is not modified).
+@end deftypefun
+
+@c **********************************************************
+@c ******************* Appendices *************************
+@c **********************************************************
+
+@include uiserver.texi
+
+@include lesser.texi
+
+@include gpl.texi
+
+@node Function and Data Index
+@unnumbered Function and Data Index
+
+@printindex fn
+
+@node Concept Index
+@unnumbered Concept Index
+
+@printindex cp
+
+
+@bye
diff --git a/doc/gpl.texi b/doc/gpl.texi
new file mode 100644
index 0000000..1b29a81
--- /dev/null
+++ b/doc/gpl.texi
@@ -0,0 +1,724 @@
+@node Copying
+@unnumbered GNU General Public License
+@center Version 3, 29 June 2007
+
+@c This file is intended to be included in another file.
+
+@display
+Copyright @copyright{} 2007 Free Software Foundation, Inc. @url{http://fsf.org/}
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+@end display
+
+@section Preamble
+
+The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+the GNU General Public License is intended to guarantee your freedom
+to share and change all versions of a program--to make sure it remains
+free software for all its users. We, the Free Software Foundation,
+use the GNU General Public License for most of our software; it
+applies also to any other work released this way by its authors. You
+can apply it to your programs, too.
+
+When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights. Therefore, you
+have certain responsibilities if you distribute copies of the
+software, or if you modify it: responsibilities to respect the freedom
+of others.
+
+For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received. You must make sure that they, too,
+receive or can get the source code. And you must show them these
+terms so they know their rights.
+
+Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software. For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the
+manufacturer can do so. This is fundamentally incompatible with the
+aim of protecting users' freedom to change the software. The
+systematic pattern of such abuse occurs in the area of products for
+individuals to use, which is precisely where it is most unacceptable.
+Therefore, we have designed this version of the GPL to prohibit the
+practice for those products. If such problems arise substantially in
+other domains, we stand ready to extend this provision to those
+domains in future versions of the GPL, as needed to protect the
+freedom of users.
+
+Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish
+to avoid the special danger that patents applied to a free program
+could make it effectively proprietary. To prevent this, the GPL
+assures that patents cannot be used to render the program non-free.
+
+The precise terms and conditions for copying, distribution and
+modification follow.
+
+@iftex
+@section TERMS AND CONDITIONS
+@end iftex
+@ifinfo
+@center TERMS AND CONDITIONS
+@end ifinfo
+
+@enumerate 0
+@item Definitions.
+
+``This License'' refers to version 3 of the GNU General Public License.
+
+``Copyright'' also means copyright-like laws that apply to other kinds
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+
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+
+To ``propagate'' a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
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+
+To ``convey'' a work means any kind of propagation that enables other
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+
+An interactive user interface displays ``Appropriate Legal Notices'' to
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+
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+
+@item Basic Permissions.
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+
+You may make, run and propagate covered works that you do not convey,
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+
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+
+@item Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+No covered work shall be deemed part of an effective technological
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+similar laws prohibiting or restricting circumvention of such
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+@item Conveying Verbatim Copies.
+
+You may convey verbatim copies of the Program's source code as you
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+
+You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+@item Conveying Modified Source Versions.
+
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+conditions:
+
+@enumerate a
+@item
+The work must carry prominent notices stating that you modified it,
+and giving a relevant date.
+
+@item
+The work must carry prominent notices stating that it is released
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+requirement modifies the requirement in section 4 to ``keep intact all
+notices''.
+
+@item
+You must license the entire work, as a whole, under this License to
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+
+@item
+If the work has interactive user interfaces, each must display
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+need not make them do so.
+@end enumerate
+
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+@enumerate a
+@item
+Convey the object code in, or embodied in, a physical product
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+Corresponding Source fixed on a durable physical medium customarily
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+Convey the object code in, or embodied in, a physical product
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+
+@item
+Convey individual copies of the object code with a copy of the written
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+6b.
+
+@item
+Convey the object code by offering access from a designated place
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+obligated to ensure that it is available for as long as needed to
+satisfy these requirements.
+
+@item
+Convey the object code using peer-to-peer transmission, provided you
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+
+@end enumerate
+
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+A ``User Product'' is either (1) a ``consumer product'', which means any
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+
+@item Additional Terms.
+
+``Additional permissions'' are terms that supplement the terms of this
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+Additional permissions that are applicable to the entire Program shall
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+
+When you convey a copy of a covered work, you may at your option
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+Notwithstanding any other provision of this License, for material you
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+@enumerate a
+@item
+Disclaiming warranty or limiting liability differently from the terms
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+@item
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+
+@item
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+
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+Requiring indemnification of licensors and authors of that material by
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+
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+Additional terms, permissive or non-permissive, may be stated in the
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+
+@item Termination.
+
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+
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+
+Moreover, your license from a particular copyright holder is
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+
+@item Acceptance Not Required for Having Copies.
+
+You are not required to accept this License in order to receive or run
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+to receive a copy likewise does not require acceptance. However,
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+
+@item No Surrender of Others' Freedom.
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+
+@item Use with the GNU Affero General Public License.
+
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+combination as such.
+
+@item Revised Versions of this License.
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+
+@item Disclaimer of Warranty.
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+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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+
+@item Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
+CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
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+ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
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+TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
+PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+@item Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+@iftex
+@heading END OF TERMS AND CONDITIONS
+@end iftex
+@ifinfo
+@center END OF TERMS AND CONDITIONS
+@end ifinfo
+@section How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the ``copyright'' line and a pointer to where the full notice is found.
+@smallexample
+@var{one line to give the program's name and a brief idea of what it does.}
+Copyright (C) @var{year} @var{name of author}
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see @url{http://www.gnu.org/licenses/}.
+@end smallexample
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+@smallexample
+@var{program} Copyright (C) @var{year} @var{name of author}
+This program comes with ABSOLUTELY NO WARRANTY; for details type @samp{show w}.
+This is free software, and you are welcome to redistribute it under certain conditions; type @samp{show c} for details.
+@end smallexample
+
+The hypothetical commands @samp{show w} and @samp{show c} should show
+the appropriate parts of the General Public License. Of course, your
+program's commands might be different; for a GUI interface, you would
+use an ``about box''.
+
+You should also get your employer (if you work as a programmer) or school,
+if any, to sign a ``copyright disclaimer'' for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+@url{http://www.gnu.org/licenses/}.
+
+The GNU General Public License does not permit incorporating your
+program into proprietary programs. If your program is a subroutine
+library, you may consider it more useful to permit linking proprietary
+applications with the library. If this is what you want to do, use
+the GNU Lesser General Public License instead of this License. But
+first, please read @url{http://www.gnu.org/philosophy/why-not-lgpl.html}.
+
+@end enumerate
diff --git a/doc/lesser.texi b/doc/lesser.texi
new file mode 100644
index 0000000..f23f0fd
--- /dev/null
+++ b/doc/lesser.texi
@@ -0,0 +1,565 @@
+@node Library Copying
+@unnumbered GNU Lesser General Public License
+
+@cindex LGPL, Lesser General Public License
+@center Version 2.1, February 1999
+
+@display
+Copyright @copyright{} 1991, 1999 Free Software Foundation, Inc.
+59 Temple Place -- Suite 330, Boston, MA 02111-1307, USA
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL. It also counts
+as the successor of the GNU Library Public License, version 2, hence the
+version number 2.1.]
+@end display
+
+@section Preamble
+
+ The licenses for most software are designed to take away your
+freedom to share and change it. By contrast, the GNU General Public
+Licenses are intended to guarantee your freedom to share and change
+free software---to make sure the software is free for all its users.
+
+ This license, the Lesser General Public License, applies to some
+specially designated software---typically libraries---of the Free
+Software Foundation and other authors who decide to use it. You can use
+it too, but we suggest you first think carefully about whether this
+license or the ordinary General Public License is the better strategy to
+use in any particular case, based on the explanations below.
+
+ When we speak of free software, we are referring to freedom of use,
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+you have the freedom to distribute copies of free software (and charge
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+
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+ Most GNU software, including some libraries, is covered by the
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+General Public License, applies to certain designated libraries, and
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+
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+
+ Although the Lesser General Public License is Less protective of the
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+
+@iftex
+@section TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+@end iftex
+@ifinfo
+@center GNU LESSER GENERAL PUBLIC LICENSE
+@center TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+@end ifinfo
+
+@enumerate 0
+@item
+This License Agreement applies to any software library or other program
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+
+@item
+Give prominent notice with the combined library of the fact
+that part of it is a work based on the Library, and explaining
+where to find the accompanying uncombined form of the same work.
+@end enumerate
+
+@item
+You may not copy, modify, sublicense, link with, or distribute
+the Library except as expressly provided under this License. Any
+attempt otherwise to copy, modify, sublicense, link with, or
+distribute the Library is void, and will automatically terminate your
+rights under this License. However, parties who have received copies,
+or rights, from you under this License will not have their licenses
+terminated so long as such parties remain in full compliance.
+
+@item
+You are not required to accept this License, since you have not
+signed it. However, nothing else grants you permission to modify or
+distribute the Library or its derivative works. These actions are
+prohibited by law if you do not accept this License. Therefore, by
+modifying or distributing the Library (or any work based on the
+Library), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Library or works based on it.
+
+@item
+Each time you redistribute the Library (or any work based on the
+Library), the recipient automatically receives a license from the
+original licensor to copy, distribute, link with or modify the Library
+subject to these terms and conditions. You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties with
+this License.
+
+@item
+If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Library at all. For example, if a patent
+license would not permit royalty-free redistribution of the Library by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Library.
+
+If any portion of this section is held invalid or unenforceable under any
+particular circumstance, the balance of the section is intended to apply,
+and the section as a whole is intended to apply in other circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system which is
+implemented by public license practices. Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+@item
+If the distribution and/or use of the Library is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Library under this License may add
+an explicit geographical distribution limitation excluding those countries,
+so that distribution is permitted only in or among countries not thus
+excluded. In such case, this License incorporates the limitation as if
+written in the body of this License.
+
+@item
+The Free Software Foundation may publish revised and/or new
+versions of the Lesser General Public License from time to time.
+Such new versions will be similar in spirit to the present version,
+but may differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Library
+specifies a version number of this License which applies to it and
+``any later version'', you have the option of following the terms and
+conditions either of that version or of any later version published by
+the Free Software Foundation. If the Library does not specify a
+license version number, you may choose any version ever published by
+the Free Software Foundation.
+
+@item
+If you wish to incorporate parts of the Library into other free
+programs whose distribution conditions are incompatible with these,
+write to the author to ask for permission. For software which is
+copyrighted by the Free Software Foundation, write to the Free
+Software Foundation; we sometimes make exceptions for this. Our
+decision will be guided by the two goals of preserving the free status
+of all derivatives of our free software and of promoting the sharing
+and reuse of software generally.
+
+@iftex
+@heading NO WARRANTY
+@end iftex
+@ifinfo
+@center NO WARRANTY
+@end ifinfo
+
+@item
+BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
+WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE LIBRARY ``AS IS'' WITHOUT WARRANTY OF ANY
+KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
+LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+@item
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
+CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
+LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
+FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+@end enumerate
+
+@iftex
+@heading END OF TERMS AND CONDITIONS
+@end iftex
+@ifinfo
+@center END OF TERMS AND CONDITIONS
+@end ifinfo
+
+@page
+@section How to Apply These Terms to Your New Libraries
+
+ If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change. You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+ To apply these terms, attach the following notices to the library. It is
+safest to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least the
+``copyright'' line and a pointer to where the full notice is found.
+
+@smallexample
+@var{one line to give the library's name and an idea of what it does.}
+Copyright (C) @var{year} @var{name of author}
+
+This library is free software; you can redistribute it and/or modify it
+under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or (at
+your option) any later version.
+
+This library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
+USA.
+@end smallexample
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a ``copyright disclaimer'' for the library, if
+necessary. Here is a sample; alter the names:
+
+@smallexample
+Yoyodyne, Inc., hereby disclaims all copyright interest in the library
+`Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+@var{signature of Ty Coon}, 1 April 1990
+Ty Coon, President of Vice
+@end smallexample
+
+That's all there is to it!
diff --git a/doc/mdate-sh b/doc/mdate-sh
new file mode 100755
index 0000000..83d2700
--- /dev/null
+++ b/doc/mdate-sh
@@ -0,0 +1,205 @@
+#!/bin/sh
+# Get modification time of a file or directory and pretty-print it.
+
+scriptversion=2007-03-30.02
+
+# Copyright (C) 1995, 1996, 1997, 2003, 2004, 2005, 2007 Free Software
+# Foundation, Inc.
+# written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, June 1995
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+case $1 in
+ '')
+ echo "$0: No file. Try \`$0 --help' for more information." 1>&2
+ exit 1;
+ ;;
+ -h | --h*)
+ cat <<\EOF
+Usage: mdate-sh [--help] [--version] FILE
+
+Pretty-print the modification time of FILE.
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+ exit $?
+ ;;
+ -v | --v*)
+ echo "mdate-sh $scriptversion"
+ exit $?
+ ;;
+esac
+
+# Prevent date giving response in another language.
+LANG=C
+export LANG
+LC_ALL=C
+export LC_ALL
+LC_TIME=C
+export LC_TIME
+
+# GNU ls changes its time format in response to the TIME_STYLE
+# variable. Since we cannot assume `unset' works, revert this
+# variable to its documented default.
+if test "${TIME_STYLE+set}" = set; then
+ TIME_STYLE=posix-long-iso
+ export TIME_STYLE
+fi
+
+save_arg1=$1
+
+# Find out how to get the extended ls output of a file or directory.
+if ls -L /dev/null 1>/dev/null 2>&1; then
+ ls_command='ls -L -l -d'
+else
+ ls_command='ls -l -d'
+fi
+# Avoid user/group names that might have spaces, when possible.
+if ls -n /dev/null 1>/dev/null 2>&1; then
+ ls_command="$ls_command -n"
+fi
+
+# A `ls -l' line looks as follows on OS/2.
+# drwxrwx--- 0 Aug 11 2001 foo
+# This differs from Unix, which adds ownership information.
+# drwxrwx--- 2 root root 4096 Aug 11 2001 foo
+#
+# To find the date, we split the line on spaces and iterate on words
+# until we find a month. This cannot work with files whose owner is a
+# user named `Jan', or `Feb', etc. However, it's unlikely that `/'
+# will be owned by a user whose name is a month. So we first look at
+# the extended ls output of the root directory to decide how many
+# words should be skipped to get the date.
+
+# On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below.
+set x`$ls_command /`
+
+# Find which argument is the month.
+month=
+command=
+until test $month
+do
+ shift
+ # Add another shift to the command.
+ command="$command shift;"
+ case $1 in
+ Jan) month=January; nummonth=1;;
+ Feb) month=February; nummonth=2;;
+ Mar) month=March; nummonth=3;;
+ Apr) month=April; nummonth=4;;
+ May) month=May; nummonth=5;;
+ Jun) month=June; nummonth=6;;
+ Jul) month=July; nummonth=7;;
+ Aug) month=August; nummonth=8;;
+ Sep) month=September; nummonth=9;;
+ Oct) month=October; nummonth=10;;
+ Nov) month=November; nummonth=11;;
+ Dec) month=December; nummonth=12;;
+ esac
+done
+
+# Get the extended ls output of the file or directory.
+set dummy x`eval "$ls_command \"\$save_arg1\""`
+
+# Remove all preceding arguments
+eval $command
+
+# Because of the dummy argument above, month is in $2.
+#
+# On a POSIX system, we should have
+#
+# $# = 5
+# $1 = file size
+# $2 = month
+# $3 = day
+# $4 = year or time
+# $5 = filename
+#
+# On Darwin 7.7.0 and 7.6.0, we have
+#
+# $# = 4
+# $1 = day
+# $2 = month
+# $3 = year or time
+# $4 = filename
+
+# Get the month.
+case $2 in
+ Jan) month=January; nummonth=1;;
+ Feb) month=February; nummonth=2;;
+ Mar) month=March; nummonth=3;;
+ Apr) month=April; nummonth=4;;
+ May) month=May; nummonth=5;;
+ Jun) month=June; nummonth=6;;
+ Jul) month=July; nummonth=7;;
+ Aug) month=August; nummonth=8;;
+ Sep) month=September; nummonth=9;;
+ Oct) month=October; nummonth=10;;
+ Nov) month=November; nummonth=11;;
+ Dec) month=December; nummonth=12;;
+esac
+
+case $3 in
+ ???*) day=$1;;
+ *) day=$3; shift;;
+esac
+
+# Here we have to deal with the problem that the ls output gives either
+# the time of day or the year.
+case $3 in
+ *:*) set `date`; eval year=\$$#
+ case $2 in
+ Jan) nummonthtod=1;;
+ Feb) nummonthtod=2;;
+ Mar) nummonthtod=3;;
+ Apr) nummonthtod=4;;
+ May) nummonthtod=5;;
+ Jun) nummonthtod=6;;
+ Jul) nummonthtod=7;;
+ Aug) nummonthtod=8;;
+ Sep) nummonthtod=9;;
+ Oct) nummonthtod=10;;
+ Nov) nummonthtod=11;;
+ Dec) nummonthtod=12;;
+ esac
+ # For the first six month of the year the time notation can also
+ # be used for files modified in the last year.
+ if (expr $nummonth \> $nummonthtod) > /dev/null;
+ then
+ year=`expr $year - 1`
+ fi;;
+ *) year=$3;;
+esac
+
+# The result.
+echo $day $month $year
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-end: "$"
+# End:
diff --git a/doc/module-overview.sk b/doc/module-overview.sk
new file mode 100644
index 0000000..5b3af15
--- /dev/null
+++ b/doc/module-overview.sk
@@ -0,0 +1,640 @@
+##Sketch 1 2
+document()
+layout('A4',1)
+fp((0,0,0))
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+dstyle('Text')
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+lc(1)
+lj(0)
+ld(())
+la1()
+la2()
+dstyle('Application Box')
+layer('Layer 1',1,1,0,0,(0,0,0))
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+r(0,0,0,0,688.145,44.1554)
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+Fs(10)
+txt('GPG',(1,0,0,0.905764,344.004,335.686))
+G_()
+G()
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+Fn('Helvetica')
+Fs(14)
+style('Text')
+txt('GpgConf',(0.552654,0,0,0.500564,481.802,340.184),1,1)
+G_()
+G()
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+r(70.5589,0,0,-28.347,191.338,354.331,0.0670228,0.151107)
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+Fn('Helvetica')
+Fs(14)
+style('Text')
+txt('GpgSM',(0.552654,0,0,0.500574,226.376,340.185),1,1)
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+lw(4.25)
+b()
+bs(347.244,325.984,0)
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+fp((0,0,0))
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+Fn('Palatino-Roman')
+txt('2008-07-17',(0.608301,0,0,0.608301,708.661,65.8308))
+lw(1)
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+ld((1, 1))
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+b()
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+G()
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+style('Text')
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diff --git a/doc/stamp-vti b/doc/stamp-vti
new file mode 100644
index 0000000..3e9775f
--- /dev/null
+++ b/doc/stamp-vti
@@ -0,0 +1,4 @@
+@set UPDATED 2 May 2012
+@set UPDATED-MONTH May 2012
+@set EDITION 1.3.2
+@set VERSION 1.3.2
diff --git a/doc/texinfo.tex b/doc/texinfo.tex
new file mode 100644
index 0000000..d2b264d
--- /dev/null
+++ b/doc/texinfo.tex
@@ -0,0 +1,8962 @@
+% texinfo.tex -- TeX macros to handle Texinfo files.
+%
+% Load plain if necessary, i.e., if running under initex.
+\expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
+%
+\def\texinfoversion{2007-12-02.17}
+%
+% Copyright (C) 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995, 2007,
+% 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
+% 2007 Free Software Foundation, Inc.
+%
+% This texinfo.tex file is free software: you can redistribute it and/or
+% modify it under the terms of the GNU General Public License as
+% published by the Free Software Foundation, either version 3 of the
+% License, or (at your option) any later version.
+%
+% This texinfo.tex file is distributed in the hope that it will be
+% useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+% of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+% General Public License for more details.
+%
+% You should have received a copy of the GNU General Public License
+% along with this program. If not, see <http://www.gnu.org/licenses/>.
+%
+% As a special exception, when this file is read by TeX when processing
+% a Texinfo source document, you may use the result without
+% restriction. (This has been our intent since Texinfo was invented.)
+%
+% Please try the latest version of texinfo.tex before submitting bug
+% reports; you can get the latest version from:
+% http://www.gnu.org/software/texinfo/ (the Texinfo home page), or
+% ftp://tug.org/tex/texinfo.tex
+% (and all CTAN mirrors, see http://www.ctan.org).
+% The texinfo.tex in any given distribution could well be out
+% of date, so if that's what you're using, please check.
+%
+% Send bug reports to bug-texinfo@gnu.org. Please include including a
+% complete document in each bug report with which we can reproduce the
+% problem. Patches are, of course, greatly appreciated.
+%
+% To process a Texinfo manual with TeX, it's most reliable to use the
+% texi2dvi shell script that comes with the distribution. For a simple
+% manual foo.texi, however, you can get away with this:
+% tex foo.texi
+% texindex foo.??
+% tex foo.texi
+% tex foo.texi
+% dvips foo.dvi -o # or whatever; this makes foo.ps.
+% The extra TeX runs get the cross-reference information correct.
+% Sometimes one run after texindex suffices, and sometimes you need more
+% than two; texi2dvi does it as many times as necessary.
+%
+% It is possible to adapt texinfo.tex for other languages, to some
+% extent. You can get the existing language-specific files from the
+% full Texinfo distribution.
+%
+% The GNU Texinfo home page is http://www.gnu.org/software/texinfo.
+
+
+\message{Loading texinfo [version \texinfoversion]:}
+
+% If in a .fmt file, print the version number
+% and turn on active characters that we couldn't do earlier because
+% they might have appeared in the input file name.
+\everyjob{\message{[Texinfo version \texinfoversion]}%
+ \catcode`+=\active \catcode`\_=\active}
+
+
+\chardef\other=12
+
+% We never want plain's \outer definition of \+ in Texinfo.
+% For @tex, we can use \tabalign.
+\let\+ = \relax
+
+% Save some plain tex macros whose names we will redefine.
+\let\ptexb=\b
+\let\ptexbullet=\bullet
+\let\ptexc=\c
+\let\ptexcomma=\,
+\let\ptexdot=\.
+\let\ptexdots=\dots
+\let\ptexend=\end
+\let\ptexequiv=\equiv
+\let\ptexexclam=\!
+\let\ptexfootnote=\footnote
+\let\ptexgtr=>
+\let\ptexhat=^
+\let\ptexi=\i
+\let\ptexindent=\indent
+\let\ptexinsert=\insert
+\let\ptexlbrace=\{
+\let\ptexless=<
+\let\ptexnewwrite\newwrite
+\let\ptexnoindent=\noindent
+\let\ptexplus=+
+\let\ptexrbrace=\}
+\let\ptexslash=\/
+\let\ptexstar=\*
+\let\ptext=\t
+
+% If this character appears in an error message or help string, it
+% starts a new line in the output.
+\newlinechar = `^^J
+
+% Use TeX 3.0's \inputlineno to get the line number, for better error
+% messages, but if we're using an old version of TeX, don't do anything.
+%
+\ifx\inputlineno\thisisundefined
+ \let\linenumber = \empty % Pre-3.0.
+\else
+ \def\linenumber{l.\the\inputlineno:\space}
+\fi
+
+% Set up fixed words for English if not already set.
+\ifx\putwordAppendix\undefined \gdef\putwordAppendix{Appendix}\fi
+\ifx\putwordChapter\undefined \gdef\putwordChapter{Chapter}\fi
+\ifx\putwordfile\undefined \gdef\putwordfile{file}\fi
+\ifx\putwordin\undefined \gdef\putwordin{in}\fi
+\ifx\putwordIndexIsEmpty\undefined \gdef\putwordIndexIsEmpty{(Index is empty)}\fi
+\ifx\putwordIndexNonexistent\undefined \gdef\putwordIndexNonexistent{(Index is nonexistent)}\fi
+\ifx\putwordInfo\undefined \gdef\putwordInfo{Info}\fi
+\ifx\putwordInstanceVariableof\undefined \gdef\putwordInstanceVariableof{Instance Variable of}\fi
+\ifx\putwordMethodon\undefined \gdef\putwordMethodon{Method on}\fi
+\ifx\putwordNoTitle\undefined \gdef\putwordNoTitle{No Title}\fi
+\ifx\putwordof\undefined \gdef\putwordof{of}\fi
+\ifx\putwordon\undefined \gdef\putwordon{on}\fi
+\ifx\putwordpage\undefined \gdef\putwordpage{page}\fi
+\ifx\putwordsection\undefined \gdef\putwordsection{section}\fi
+\ifx\putwordSection\undefined \gdef\putwordSection{Section}\fi
+\ifx\putwordsee\undefined \gdef\putwordsee{see}\fi
+\ifx\putwordSee\undefined \gdef\putwordSee{See}\fi
+\ifx\putwordShortTOC\undefined \gdef\putwordShortTOC{Short Contents}\fi
+\ifx\putwordTOC\undefined \gdef\putwordTOC{Table of Contents}\fi
+%
+\ifx\putwordMJan\undefined \gdef\putwordMJan{January}\fi
+\ifx\putwordMFeb\undefined \gdef\putwordMFeb{February}\fi
+\ifx\putwordMMar\undefined \gdef\putwordMMar{March}\fi
+\ifx\putwordMApr\undefined \gdef\putwordMApr{April}\fi
+\ifx\putwordMMay\undefined \gdef\putwordMMay{May}\fi
+\ifx\putwordMJun\undefined \gdef\putwordMJun{June}\fi
+\ifx\putwordMJul\undefined \gdef\putwordMJul{July}\fi
+\ifx\putwordMAug\undefined \gdef\putwordMAug{August}\fi
+\ifx\putwordMSep\undefined \gdef\putwordMSep{September}\fi
+\ifx\putwordMOct\undefined \gdef\putwordMOct{October}\fi
+\ifx\putwordMNov\undefined \gdef\putwordMNov{November}\fi
+\ifx\putwordMDec\undefined \gdef\putwordMDec{December}\fi
+%
+\ifx\putwordDefmac\undefined \gdef\putwordDefmac{Macro}\fi
+\ifx\putwordDefspec\undefined \gdef\putwordDefspec{Special Form}\fi
+\ifx\putwordDefvar\undefined \gdef\putwordDefvar{Variable}\fi
+\ifx\putwordDefopt\undefined \gdef\putwordDefopt{User Option}\fi
+\ifx\putwordDeffunc\undefined \gdef\putwordDeffunc{Function}\fi
+
+% Since the category of space is not known, we have to be careful.
+\chardef\spacecat = 10
+\def\spaceisspace{\catcode`\ =\spacecat}
+
+% sometimes characters are active, so we need control sequences.
+\chardef\colonChar = `\:
+\chardef\commaChar = `\,
+\chardef\dashChar = `\-
+\chardef\dotChar = `\.
+\chardef\exclamChar= `\!
+\chardef\lquoteChar= `\`
+\chardef\questChar = `\?
+\chardef\rquoteChar= `\'
+\chardef\semiChar = `\;
+\chardef\underChar = `\_
+
+% Ignore a token.
+%
+\def\gobble#1{}
+
+% The following is used inside several \edef's.
+\def\makecsname#1{\expandafter\noexpand\csname#1\endcsname}
+
+% Hyphenation fixes.
+\hyphenation{
+ Flor-i-da Ghost-script Ghost-view Mac-OS Post-Script
+ ap-pen-dix bit-map bit-maps
+ data-base data-bases eshell fall-ing half-way long-est man-u-script
+ man-u-scripts mini-buf-fer mini-buf-fers over-view par-a-digm
+ par-a-digms rath-er rec-tan-gu-lar ro-bot-ics se-vere-ly set-up spa-ces
+ spell-ing spell-ings
+ stand-alone strong-est time-stamp time-stamps which-ever white-space
+ wide-spread wrap-around
+}
+
+% Margin to add to right of even pages, to left of odd pages.
+\newdimen\bindingoffset
+\newdimen\normaloffset
+\newdimen\pagewidth \newdimen\pageheight
+
+% For a final copy, take out the rectangles
+% that mark overfull boxes (in case you have decided
+% that the text looks ok even though it passes the margin).
+%
+\def\finalout{\overfullrule=0pt}
+
+% @| inserts a changebar to the left of the current line. It should
+% surround any changed text. This approach does *not* work if the
+% change spans more than two lines of output. To handle that, we would
+% have adopt a much more difficult approach (putting marks into the main
+% vertical list for the beginning and end of each change).
+%
+\def\|{%
+ % \vadjust can only be used in horizontal mode.
+ \leavevmode
+ %
+ % Append this vertical mode material after the current line in the output.
+ \vadjust{%
+ % We want to insert a rule with the height and depth of the current
+ % leading; that is exactly what \strutbox is supposed to record.
+ \vskip-\baselineskip
+ %
+ % \vadjust-items are inserted at the left edge of the type. So
+ % the \llap here moves out into the left-hand margin.
+ \llap{%
+ %
+ % For a thicker or thinner bar, change the `1pt'.
+ \vrule height\baselineskip width1pt
+ %
+ % This is the space between the bar and the text.
+ \hskip 12pt
+ }%
+ }%
+}
+
+% Sometimes it is convenient to have everything in the transcript file
+% and nothing on the terminal. We don't just call \tracingall here,
+% since that produces some useless output on the terminal. We also make
+% some effort to order the tracing commands to reduce output in the log
+% file; cf. trace.sty in LaTeX.
+%
+\def\gloggingall{\begingroup \globaldefs = 1 \loggingall \endgroup}%
+\def\loggingall{%
+ \tracingstats2
+ \tracingpages1
+ \tracinglostchars2 % 2 gives us more in etex
+ \tracingparagraphs1
+ \tracingoutput1
+ \tracingmacros2
+ \tracingrestores1
+ \showboxbreadth\maxdimen \showboxdepth\maxdimen
+ \ifx\eTeXversion\undefined\else % etex gives us more logging
+ \tracingscantokens1
+ \tracingifs1
+ \tracinggroups1
+ \tracingnesting2
+ \tracingassigns1
+ \fi
+ \tracingcommands3 % 3 gives us more in etex
+ \errorcontextlines16
+}%
+
+% add check for \lastpenalty to plain's definitions. If the last thing
+% we did was a \nobreak, we don't want to insert more space.
+%
+\def\smallbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\smallskipamount
+ \removelastskip\penalty-50\smallskip\fi\fi}
+\def\medbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\medskipamount
+ \removelastskip\penalty-100\medskip\fi\fi}
+\def\bigbreak{\ifnum\lastpenalty<10000\par\ifdim\lastskip<\bigskipamount
+ \removelastskip\penalty-200\bigskip\fi\fi}
+
+% For @cropmarks command.
+% Do @cropmarks to get crop marks.
+%
+\newif\ifcropmarks
+\let\cropmarks = \cropmarkstrue
+%
+% Dimensions to add cropmarks at corners.
+% Added by P. A. MacKay, 12 Nov. 1986
+%
+\newdimen\outerhsize \newdimen\outervsize % set by the paper size routines
+\newdimen\cornerlong \cornerlong=1pc
+\newdimen\cornerthick \cornerthick=.3pt
+\newdimen\topandbottommargin \topandbottommargin=.75in
+
+% Output a mark which sets \thischapter, \thissection and \thiscolor.
+% We dump everything together because we only have one kind of mark.
+% This works because we only use \botmark / \topmark, not \firstmark.
+%
+% A mark contains a subexpression of the \ifcase ... \fi construct.
+% \get*marks macros below extract the needed part using \ifcase.
+%
+% Another complication is to let the user choose whether \thischapter
+% (\thissection) refers to the chapter (section) in effect at the top
+% of a page, or that at the bottom of a page. The solution is
+% described on page 260 of The TeXbook. It involves outputting two
+% marks for the sectioning macros, one before the section break, and
+% one after. I won't pretend I can describe this better than DEK...
+\def\domark{%
+ \toks0=\expandafter{\lastchapterdefs}%
+ \toks2=\expandafter{\lastsectiondefs}%
+ \toks4=\expandafter{\prevchapterdefs}%
+ \toks6=\expandafter{\prevsectiondefs}%
+ \toks8=\expandafter{\lastcolordefs}%
+ \mark{%
+ \the\toks0 \the\toks2
+ \noexpand\or \the\toks4 \the\toks6
+ \noexpand\else \the\toks8
+ }%
+}
+% \topmark doesn't work for the very first chapter (after the title
+% page or the contents), so we use \firstmark there -- this gets us
+% the mark with the chapter defs, unless the user sneaks in, e.g.,
+% @setcolor (or @url, or @link, etc.) between @contents and the very
+% first @chapter.
+\def\gettopheadingmarks{%
+ \ifcase0\topmark\fi
+ \ifx\thischapter\empty \ifcase0\firstmark\fi \fi
+}
+\def\getbottomheadingmarks{\ifcase1\botmark\fi}
+\def\getcolormarks{\ifcase2\topmark\fi}
+
+% Avoid "undefined control sequence" errors.
+\def\lastchapterdefs{}
+\def\lastsectiondefs{}
+\def\prevchapterdefs{}
+\def\prevsectiondefs{}
+\def\lastcolordefs{}
+
+% Main output routine.
+\chardef\PAGE = 255
+\output = {\onepageout{\pagecontents\PAGE}}
+
+\newbox\headlinebox
+\newbox\footlinebox
+
+% \onepageout takes a vbox as an argument. Note that \pagecontents
+% does insertions, but you have to call it yourself.
+\def\onepageout#1{%
+ \ifcropmarks \hoffset=0pt \else \hoffset=\normaloffset \fi
+ %
+ \ifodd\pageno \advance\hoffset by \bindingoffset
+ \else \advance\hoffset by -\bindingoffset\fi
+ %
+ % Do this outside of the \shipout so @code etc. will be expanded in
+ % the headline as they should be, not taken literally (outputting ''code).
+ \ifodd\pageno \getoddheadingmarks \else \getevenheadingmarks \fi
+ \setbox\headlinebox = \vbox{\let\hsize=\pagewidth \makeheadline}%
+ \ifodd\pageno \getoddfootingmarks \else \getevenfootingmarks \fi
+ \setbox\footlinebox = \vbox{\let\hsize=\pagewidth \makefootline}%
+ %
+ {%
+ % Have to do this stuff outside the \shipout because we want it to
+ % take effect in \write's, yet the group defined by the \vbox ends
+ % before the \shipout runs.
+ %
+ \indexdummies % don't expand commands in the output.
+ \normalturnoffactive % \ in index entries must not stay \, e.g., if
+ % the page break happens to be in the middle of an example.
+ % We don't want .vr (or whatever) entries like this:
+ % \entry{{\tt \indexbackslash }acronym}{32}{\code {\acronym}}
+ % "\acronym" won't work when it's read back in;
+ % it needs to be
+ % {\code {{\tt \backslashcurfont }acronym}
+ \shipout\vbox{%
+ % Do this early so pdf references go to the beginning of the page.
+ \ifpdfmakepagedest \pdfdest name{\the\pageno} xyz\fi
+ %
+ \ifcropmarks \vbox to \outervsize\bgroup
+ \hsize = \outerhsize
+ \vskip-\topandbottommargin
+ \vtop to0pt{%
+ \line{\ewtop\hfil\ewtop}%
+ \nointerlineskip
+ \line{%
+ \vbox{\moveleft\cornerthick\nstop}%
+ \hfill
+ \vbox{\moveright\cornerthick\nstop}%
+ }%
+ \vss}%
+ \vskip\topandbottommargin
+ \line\bgroup
+ \hfil % center the page within the outer (page) hsize.
+ \ifodd\pageno\hskip\bindingoffset\fi
+ \vbox\bgroup
+ \fi
+ %
+ \unvbox\headlinebox
+ \pagebody{#1}%
+ \ifdim\ht\footlinebox > 0pt
+ % Only leave this space if the footline is nonempty.
+ % (We lessened \vsize for it in \oddfootingyyy.)
+ % The \baselineskip=24pt in plain's \makefootline has no effect.
+ \vskip 24pt
+ \unvbox\footlinebox
+ \fi
+ %
+ \ifcropmarks
+ \egroup % end of \vbox\bgroup
+ \hfil\egroup % end of (centering) \line\bgroup
+ \vskip\topandbottommargin plus1fill minus1fill
+ \boxmaxdepth = \cornerthick
+ \vbox to0pt{\vss
+ \line{%
+ \vbox{\moveleft\cornerthick\nsbot}%
+ \hfill
+ \vbox{\moveright\cornerthick\nsbot}%
+ }%
+ \nointerlineskip
+ \line{\ewbot\hfil\ewbot}%
+ }%
+ \egroup % \vbox from first cropmarks clause
+ \fi
+ }% end of \shipout\vbox
+ }% end of group with \indexdummies
+ \advancepageno
+ \ifnum\outputpenalty>-20000 \else\dosupereject\fi
+}
+
+\newinsert\margin \dimen\margin=\maxdimen
+
+\def\pagebody#1{\vbox to\pageheight{\boxmaxdepth=\maxdepth #1}}
+{\catcode`\@ =11
+\gdef\pagecontents#1{\ifvoid\topins\else\unvbox\topins\fi
+% marginal hacks, juha@viisa.uucp (Juha Takala)
+\ifvoid\margin\else % marginal info is present
+ \rlap{\kern\hsize\vbox to\z@{\kern1pt\box\margin \vss}}\fi
+\dimen@=\dp#1\relax \unvbox#1\relax
+\ifvoid\footins\else\vskip\skip\footins\footnoterule \unvbox\footins\fi
+\ifr@ggedbottom \kern-\dimen@ \vfil \fi}
+}
+
+% Here are the rules for the cropmarks. Note that they are
+% offset so that the space between them is truly \outerhsize or \outervsize
+% (P. A. MacKay, 12 November, 1986)
+%
+\def\ewtop{\vrule height\cornerthick depth0pt width\cornerlong}
+\def\nstop{\vbox
+ {\hrule height\cornerthick depth\cornerlong width\cornerthick}}
+\def\ewbot{\vrule height0pt depth\cornerthick width\cornerlong}
+\def\nsbot{\vbox
+ {\hrule height\cornerlong depth\cornerthick width\cornerthick}}
+
+% Parse an argument, then pass it to #1. The argument is the rest of
+% the input line (except we remove a trailing comment). #1 should be a
+% macro which expects an ordinary undelimited TeX argument.
+%
+\def\parsearg{\parseargusing{}}
+\def\parseargusing#1#2{%
+ \def\argtorun{#2}%
+ \begingroup
+ \obeylines
+ \spaceisspace
+ #1%
+ \parseargline\empty% Insert the \empty token, see \finishparsearg below.
+}
+
+{\obeylines %
+ \gdef\parseargline#1^^M{%
+ \endgroup % End of the group started in \parsearg.
+ \argremovecomment #1\comment\ArgTerm%
+ }%
+}
+
+% First remove any @comment, then any @c comment.
+\def\argremovecomment#1\comment#2\ArgTerm{\argremovec #1\c\ArgTerm}
+\def\argremovec#1\c#2\ArgTerm{\argcheckspaces#1\^^M\ArgTerm}
+
+% Each occurence of `\^^M' or `<space>\^^M' is replaced by a single space.
+%
+% \argremovec might leave us with trailing space, e.g.,
+% @end itemize @c foo
+% This space token undergoes the same procedure and is eventually removed
+% by \finishparsearg.
+%
+\def\argcheckspaces#1\^^M{\argcheckspacesX#1\^^M \^^M}
+\def\argcheckspacesX#1 \^^M{\argcheckspacesY#1\^^M}
+\def\argcheckspacesY#1\^^M#2\^^M#3\ArgTerm{%
+ \def\temp{#3}%
+ \ifx\temp\empty
+ % Do not use \next, perhaps the caller of \parsearg uses it; reuse \temp:
+ \let\temp\finishparsearg
+ \else
+ \let\temp\argcheckspaces
+ \fi
+ % Put the space token in:
+ \temp#1 #3\ArgTerm
+}
+
+% If a _delimited_ argument is enclosed in braces, they get stripped; so
+% to get _exactly_ the rest of the line, we had to prevent such situation.
+% We prepended an \empty token at the very beginning and we expand it now,
+% just before passing the control to \argtorun.
+% (Similarily, we have to think about #3 of \argcheckspacesY above: it is
+% either the null string, or it ends with \^^M---thus there is no danger
+% that a pair of braces would be stripped.
+%
+% But first, we have to remove the trailing space token.
+%
+\def\finishparsearg#1 \ArgTerm{\expandafter\argtorun\expandafter{#1}}
+
+% \parseargdef\foo{...}
+% is roughly equivalent to
+% \def\foo{\parsearg\Xfoo}
+% \def\Xfoo#1{...}
+%
+% Actually, I use \csname\string\foo\endcsname, ie. \\foo, as it is my
+% favourite TeX trick. --kasal, 16nov03
+
+\def\parseargdef#1{%
+ \expandafter \doparseargdef \csname\string#1\endcsname #1%
+}
+\def\doparseargdef#1#2{%
+ \def#2{\parsearg#1}%
+ \def#1##1%
+}
+
+% Several utility definitions with active space:
+{
+ \obeyspaces
+ \gdef\obeyedspace{ }
+
+ % Make each space character in the input produce a normal interword
+ % space in the output. Don't allow a line break at this space, as this
+ % is used only in environments like @example, where each line of input
+ % should produce a line of output anyway.
+ %
+ \gdef\sepspaces{\obeyspaces\let =\tie}
+
+ % If an index command is used in an @example environment, any spaces
+ % therein should become regular spaces in the raw index file, not the
+ % expansion of \tie (\leavevmode \penalty \@M \ ).
+ \gdef\unsepspaces{\let =\space}
+}
+
+
+\def\flushcr{\ifx\par\lisppar \def\next##1{}\else \let\next=\relax \fi \next}
+
+% Define the framework for environments in texinfo.tex. It's used like this:
+%
+% \envdef\foo{...}
+% \def\Efoo{...}
+%
+% It's the responsibility of \envdef to insert \begingroup before the
+% actual body; @end closes the group after calling \Efoo. \envdef also
+% defines \thisenv, so the current environment is known; @end checks
+% whether the environment name matches. The \checkenv macro can also be
+% used to check whether the current environment is the one expected.
+%
+% Non-false conditionals (@iftex, @ifset) don't fit into this, so they
+% are not treated as enviroments; they don't open a group. (The
+% implementation of @end takes care not to call \endgroup in this
+% special case.)
+
+
+% At runtime, environments start with this:
+\def\startenvironment#1{\begingroup\def\thisenv{#1}}
+% initialize
+\let\thisenv\empty
+
+% ... but they get defined via ``\envdef\foo{...}'':
+\long\def\envdef#1#2{\def#1{\startenvironment#1#2}}
+\def\envparseargdef#1#2{\parseargdef#1{\startenvironment#1#2}}
+
+% Check whether we're in the right environment:
+\def\checkenv#1{%
+ \def\temp{#1}%
+ \ifx\thisenv\temp
+ \else
+ \badenverr
+ \fi
+}
+
+% Evironment mismatch, #1 expected:
+\def\badenverr{%
+ \errhelp = \EMsimple
+ \errmessage{This command can appear only \inenvironment\temp,
+ not \inenvironment\thisenv}%
+}
+\def\inenvironment#1{%
+ \ifx#1\empty
+ out of any environment%
+ \else
+ in environment \expandafter\string#1%
+ \fi
+}
+
+% @end foo executes the definition of \Efoo.
+% But first, it executes a specialized version of \checkenv
+%
+\parseargdef\end{%
+ \if 1\csname iscond.#1\endcsname
+ \else
+ % The general wording of \badenverr may not be ideal, but... --kasal, 06nov03
+ \expandafter\checkenv\csname#1\endcsname
+ \csname E#1\endcsname
+ \endgroup
+ \fi
+}
+
+\newhelp\EMsimple{Press RETURN to continue.}
+
+
+%% Simple single-character @ commands
+
+% @@ prints an @
+% Kludge this until the fonts are right (grr).
+\def\@{{\tt\char64}}
+
+% This is turned off because it was never documented
+% and you can use @w{...} around a quote to suppress ligatures.
+%% Define @` and @' to be the same as ` and '
+%% but suppressing ligatures.
+%\def\`{{`}}
+%\def\'{{'}}
+
+% Used to generate quoted braces.
+\def\mylbrace {{\tt\char123}}
+\def\myrbrace {{\tt\char125}}
+\let\{=\mylbrace
+\let\}=\myrbrace
+\begingroup
+ % Definitions to produce \{ and \} commands for indices,
+ % and @{ and @} for the aux/toc files.
+ \catcode`\{ = \other \catcode`\} = \other
+ \catcode`\[ = 1 \catcode`\] = 2
+ \catcode`\! = 0 \catcode`\\ = \other
+ !gdef!lbracecmd[\{]%
+ !gdef!rbracecmd[\}]%
+ !gdef!lbraceatcmd[@{]%
+ !gdef!rbraceatcmd[@}]%
+!endgroup
+
+% @comma{} to avoid , parsing problems.
+\let\comma = ,
+
+% Accents: @, @dotaccent @ringaccent @ubaraccent @udotaccent
+% Others are defined by plain TeX: @` @' @" @^ @~ @= @u @v @H.
+\let\, = \c
+\let\dotaccent = \.
+\def\ringaccent#1{{\accent23 #1}}
+\let\tieaccent = \t
+\let\ubaraccent = \b
+\let\udotaccent = \d
+
+% Other special characters: @questiondown @exclamdown @ordf @ordm
+% Plain TeX defines: @AA @AE @O @OE @L (plus lowercase versions) @ss.
+\def\questiondown{?`}
+\def\exclamdown{!`}
+\def\ordf{\leavevmode\raise1ex\hbox{\selectfonts\lllsize \underbar{a}}}
+\def\ordm{\leavevmode\raise1ex\hbox{\selectfonts\lllsize \underbar{o}}}
+
+% Dotless i and dotless j, used for accents.
+\def\imacro{i}
+\def\jmacro{j}
+\def\dotless#1{%
+ \def\temp{#1}%
+ \ifx\temp\imacro \ptexi
+ \else\ifx\temp\jmacro \j
+ \else \errmessage{@dotless can be used only with i or j}%
+ \fi\fi
+}
+
+% The \TeX{} logo, as in plain, but resetting the spacing so that a
+% period following counts as ending a sentence. (Idea found in latex.)
+%
+\edef\TeX{\TeX \spacefactor=1000 }
+
+% @LaTeX{} logo. Not quite the same results as the definition in
+% latex.ltx, since we use a different font for the raised A; it's most
+% convenient for us to use an explicitly smaller font, rather than using
+% the \scriptstyle font (since we don't reset \scriptstyle and
+% \scriptscriptstyle).
+%
+\def\LaTeX{%
+ L\kern-.36em
+ {\setbox0=\hbox{T}%
+ \vbox to \ht0{\hbox{\selectfonts\lllsize A}\vss}}%
+ \kern-.15em
+ \TeX
+}
+
+% Be sure we're in horizontal mode when doing a tie, since we make space
+% equivalent to this in @example-like environments. Otherwise, a space
+% at the beginning of a line will start with \penalty -- and
+% since \penalty is valid in vertical mode, we'd end up putting the
+% penalty on the vertical list instead of in the new paragraph.
+{\catcode`@ = 11
+ % Avoid using \@M directly, because that causes trouble
+ % if the definition is written into an index file.
+ \global\let\tiepenalty = \@M
+ \gdef\tie{\leavevmode\penalty\tiepenalty\ }
+}
+
+% @: forces normal size whitespace following.
+\def\:{\spacefactor=1000 }
+
+% @* forces a line break.
+\def\*{\hfil\break\hbox{}\ignorespaces}
+
+% @/ allows a line break.
+\let\/=\allowbreak
+
+% @. is an end-of-sentence period.
+\def\.{.\spacefactor=\endofsentencespacefactor\space}
+
+% @! is an end-of-sentence bang.
+\def\!{!\spacefactor=\endofsentencespacefactor\space}
+
+% @? is an end-of-sentence query.
+\def\?{?\spacefactor=\endofsentencespacefactor\space}
+
+% @frenchspacing on|off says whether to put extra space after punctuation.
+%
+\def\onword{on}
+\def\offword{off}
+%
+\parseargdef\frenchspacing{%
+ \def\temp{#1}%
+ \ifx\temp\onword \plainfrenchspacing
+ \else\ifx\temp\offword \plainnonfrenchspacing
+ \else
+ \errhelp = \EMsimple
+ \errmessage{Unknown @frenchspacing option `\temp', must be on/off}%
+ \fi\fi
+}
+
+% @w prevents a word break. Without the \leavevmode, @w at the
+% beginning of a paragraph, when TeX is still in vertical mode, would
+% produce a whole line of output instead of starting the paragraph.
+\def\w#1{\leavevmode\hbox{#1}}
+
+% @group ... @end group forces ... to be all on one page, by enclosing
+% it in a TeX vbox. We use \vtop instead of \vbox to construct the box
+% to keep its height that of a normal line. According to the rules for
+% \topskip (p.114 of the TeXbook), the glue inserted is
+% max (\topskip - \ht (first item), 0). If that height is large,
+% therefore, no glue is inserted, and the space between the headline and
+% the text is small, which looks bad.
+%
+% Another complication is that the group might be very large. This can
+% cause the glue on the previous page to be unduly stretched, because it
+% does not have much material. In this case, it's better to add an
+% explicit \vfill so that the extra space is at the bottom. The
+% threshold for doing this is if the group is more than \vfilllimit
+% percent of a page (\vfilllimit can be changed inside of @tex).
+%
+\newbox\groupbox
+\def\vfilllimit{0.7}
+%
+\envdef\group{%
+ \ifnum\catcode`\^^M=\active \else
+ \errhelp = \groupinvalidhelp
+ \errmessage{@group invalid in context where filling is enabled}%
+ \fi
+ \startsavinginserts
+ %
+ \setbox\groupbox = \vtop\bgroup
+ % Do @comment since we are called inside an environment such as
+ % @example, where each end-of-line in the input causes an
+ % end-of-line in the output. We don't want the end-of-line after
+ % the `@group' to put extra space in the output. Since @group
+ % should appear on a line by itself (according to the Texinfo
+ % manual), we don't worry about eating any user text.
+ \comment
+}
+%
+% The \vtop produces a box with normal height and large depth; thus, TeX puts
+% \baselineskip glue before it, and (when the next line of text is done)
+% \lineskip glue after it. Thus, space below is not quite equal to space
+% above. But it's pretty close.
+\def\Egroup{%
+ % To get correct interline space between the last line of the group
+ % and the first line afterwards, we have to propagate \prevdepth.
+ \endgraf % Not \par, as it may have been set to \lisppar.
+ \global\dimen1 = \prevdepth
+ \egroup % End the \vtop.
+ % \dimen0 is the vertical size of the group's box.
+ \dimen0 = \ht\groupbox \advance\dimen0 by \dp\groupbox
+ % \dimen2 is how much space is left on the page (more or less).
+ \dimen2 = \pageheight \advance\dimen2 by -\pagetotal
+ % if the group doesn't fit on the current page, and it's a big big
+ % group, force a page break.
+ \ifdim \dimen0 > \dimen2
+ \ifdim \pagetotal < \vfilllimit\pageheight
+ \page
+ \fi
+ \fi
+ \box\groupbox
+ \prevdepth = \dimen1
+ \checkinserts
+}
+%
+% TeX puts in an \escapechar (i.e., `@') at the beginning of the help
+% message, so this ends up printing `@group can only ...'.
+%
+\newhelp\groupinvalidhelp{%
+group can only be used in environments such as @example,^^J%
+where each line of input produces a line of output.}
+
+% @need space-in-mils
+% forces a page break if there is not space-in-mils remaining.
+
+\newdimen\mil \mil=0.001in
+
+% Old definition--didn't work.
+%\parseargdef\need{\par %
+%% This method tries to make TeX break the page naturally
+%% if the depth of the box does not fit.
+%{\baselineskip=0pt%
+%\vtop to #1\mil{\vfil}\kern -#1\mil\nobreak
+%\prevdepth=-1000pt
+%}}
+
+\parseargdef\need{%
+ % Ensure vertical mode, so we don't make a big box in the middle of a
+ % paragraph.
+ \par
+ %
+ % If the @need value is less than one line space, it's useless.
+ \dimen0 = #1\mil
+ \dimen2 = \ht\strutbox
+ \advance\dimen2 by \dp\strutbox
+ \ifdim\dimen0 > \dimen2
+ %
+ % Do a \strut just to make the height of this box be normal, so the
+ % normal leading is inserted relative to the preceding line.
+ % And a page break here is fine.
+ \vtop to #1\mil{\strut\vfil}%
+ %
+ % TeX does not even consider page breaks if a penalty added to the
+ % main vertical list is 10000 or more. But in order to see if the
+ % empty box we just added fits on the page, we must make it consider
+ % page breaks. On the other hand, we don't want to actually break the
+ % page after the empty box. So we use a penalty of 9999.
+ %
+ % There is an extremely small chance that TeX will actually break the
+ % page at this \penalty, if there are no other feasible breakpoints in
+ % sight. (If the user is using lots of big @group commands, which
+ % almost-but-not-quite fill up a page, TeX will have a hard time doing
+ % good page breaking, for example.) However, I could not construct an
+ % example where a page broke at this \penalty; if it happens in a real
+ % document, then we can reconsider our strategy.
+ \penalty9999
+ %
+ % Back up by the size of the box, whether we did a page break or not.
+ \kern -#1\mil
+ %
+ % Do not allow a page break right after this kern.
+ \nobreak
+ \fi
+}
+
+% @br forces paragraph break (and is undocumented).
+
+\let\br = \par
+
+% @page forces the start of a new page.
+%
+\def\page{\par\vfill\supereject}
+
+% @exdent text....
+% outputs text on separate line in roman font, starting at standard page margin
+
+% This records the amount of indent in the innermost environment.
+% That's how much \exdent should take out.
+\newskip\exdentamount
+
+% This defn is used inside fill environments such as @defun.
+\parseargdef\exdent{\hfil\break\hbox{\kern -\exdentamount{\rm#1}}\hfil\break}
+
+% This defn is used inside nofill environments such as @example.
+\parseargdef\nofillexdent{{\advance \leftskip by -\exdentamount
+ \leftline{\hskip\leftskip{\rm#1}}}}
+
+% @inmargin{WHICH}{TEXT} puts TEXT in the WHICH margin next to the current
+% paragraph. For more general purposes, use the \margin insertion
+% class. WHICH is `l' or `r'.
+%
+\newskip\inmarginspacing \inmarginspacing=1cm
+\def\strutdepth{\dp\strutbox}
+%
+\def\doinmargin#1#2{\strut\vadjust{%
+ \nobreak
+ \kern-\strutdepth
+ \vtop to \strutdepth{%
+ \baselineskip=\strutdepth
+ \vss
+ % if you have multiple lines of stuff to put here, you'll need to
+ % make the vbox yourself of the appropriate size.
+ \ifx#1l%
+ \llap{\ignorespaces #2\hskip\inmarginspacing}%
+ \else
+ \rlap{\hskip\hsize \hskip\inmarginspacing \ignorespaces #2}%
+ \fi
+ \null
+ }%
+}}
+\def\inleftmargin{\doinmargin l}
+\def\inrightmargin{\doinmargin r}
+%
+% @inmargin{TEXT [, RIGHT-TEXT]}
+% (if RIGHT-TEXT is given, use TEXT for left page, RIGHT-TEXT for right;
+% else use TEXT for both).
+%
+\def\inmargin#1{\parseinmargin #1,,\finish}
+\def\parseinmargin#1,#2,#3\finish{% not perfect, but better than nothing.
+ \setbox0 = \hbox{\ignorespaces #2}%
+ \ifdim\wd0 > 0pt
+ \def\lefttext{#1}% have both texts
+ \def\righttext{#2}%
+ \else
+ \def\lefttext{#1}% have only one text
+ \def\righttext{#1}%
+ \fi
+ %
+ \ifodd\pageno
+ \def\temp{\inrightmargin\righttext}% odd page -> outside is right margin
+ \else
+ \def\temp{\inleftmargin\lefttext}%
+ \fi
+ \temp
+}
+
+% @include file insert text of that file as input.
+%
+\def\include{\parseargusing\filenamecatcodes\includezzz}
+\def\includezzz#1{%
+ \pushthisfilestack
+ \def\thisfile{#1}%
+ {%
+ \makevalueexpandable
+ \def\temp{\input #1 }%
+ \expandafter
+ }\temp
+ \popthisfilestack
+}
+\def\filenamecatcodes{%
+ \catcode`\\=\other
+ \catcode`~=\other
+ \catcode`^=\other
+ \catcode`_=\other
+ \catcode`|=\other
+ \catcode`<=\other
+ \catcode`>=\other
+ \catcode`+=\other
+ \catcode`-=\other
+}
+
+\def\pushthisfilestack{%
+ \expandafter\pushthisfilestackX\popthisfilestack\StackTerm
+}
+\def\pushthisfilestackX{%
+ \expandafter\pushthisfilestackY\thisfile\StackTerm
+}
+\def\pushthisfilestackY #1\StackTerm #2\StackTerm {%
+ \gdef\popthisfilestack{\gdef\thisfile{#1}\gdef\popthisfilestack{#2}}%
+}
+
+\def\popthisfilestack{\errthisfilestackempty}
+\def\errthisfilestackempty{\errmessage{Internal error:
+ the stack of filenames is empty.}}
+
+\def\thisfile{}
+
+% @center line
+% outputs that line, centered.
+%
+\parseargdef\center{%
+ \ifhmode
+ \let\next\centerH
+ \else
+ \let\next\centerV
+ \fi
+ \next{\hfil \ignorespaces#1\unskip \hfil}%
+}
+\def\centerH#1{%
+ {%
+ \hfil\break
+ \advance\hsize by -\leftskip
+ \advance\hsize by -\rightskip
+ \line{#1}%
+ \break
+ }%
+}
+\def\centerV#1{\line{\kern\leftskip #1\kern\rightskip}}
+
+% @sp n outputs n lines of vertical space
+
+\parseargdef\sp{\vskip #1\baselineskip}
+
+% @comment ...line which is ignored...
+% @c is the same as @comment
+% @ignore ... @end ignore is another way to write a comment
+
+\def\comment{\begingroup \catcode`\^^M=\other%
+\catcode`\@=\other \catcode`\{=\other \catcode`\}=\other%
+\commentxxx}
+{\catcode`\^^M=\other \gdef\commentxxx#1^^M{\endgroup}}
+
+\let\c=\comment
+
+% @paragraphindent NCHARS
+% We'll use ems for NCHARS, close enough.
+% NCHARS can also be the word `asis' or `none'.
+% We cannot feasibly implement @paragraphindent asis, though.
+%
+\def\asisword{asis} % no translation, these are keywords
+\def\noneword{none}
+%
+\parseargdef\paragraphindent{%
+ \def\temp{#1}%
+ \ifx\temp\asisword
+ \else
+ \ifx\temp\noneword
+ \defaultparindent = 0pt
+ \else
+ \defaultparindent = #1em
+ \fi
+ \fi
+ \parindent = \defaultparindent
+}
+
+% @exampleindent NCHARS
+% We'll use ems for NCHARS like @paragraphindent.
+% It seems @exampleindent asis isn't necessary, but
+% I preserve it to make it similar to @paragraphindent.
+\parseargdef\exampleindent{%
+ \def\temp{#1}%
+ \ifx\temp\asisword
+ \else
+ \ifx\temp\noneword
+ \lispnarrowing = 0pt
+ \else
+ \lispnarrowing = #1em
+ \fi
+ \fi
+}
+
+% @firstparagraphindent WORD
+% If WORD is `none', then suppress indentation of the first paragraph
+% after a section heading. If WORD is `insert', then do indent at such
+% paragraphs.
+%
+% The paragraph indentation is suppressed or not by calling
+% \suppressfirstparagraphindent, which the sectioning commands do.
+% We switch the definition of this back and forth according to WORD.
+% By default, we suppress indentation.
+%
+\def\suppressfirstparagraphindent{\dosuppressfirstparagraphindent}
+\def\insertword{insert}
+%
+\parseargdef\firstparagraphindent{%
+ \def\temp{#1}%
+ \ifx\temp\noneword
+ \let\suppressfirstparagraphindent = \dosuppressfirstparagraphindent
+ \else\ifx\temp\insertword
+ \let\suppressfirstparagraphindent = \relax
+ \else
+ \errhelp = \EMsimple
+ \errmessage{Unknown @firstparagraphindent option `\temp'}%
+ \fi\fi
+}
+
+% Here is how we actually suppress indentation. Redefine \everypar to
+% \kern backwards by \parindent, and then reset itself to empty.
+%
+% We also make \indent itself not actually do anything until the next
+% paragraph.
+%
+\gdef\dosuppressfirstparagraphindent{%
+ \gdef\indent{%
+ \restorefirstparagraphindent
+ \indent
+ }%
+ \gdef\noindent{%
+ \restorefirstparagraphindent
+ \noindent
+ }%
+ \global\everypar = {%
+ \kern -\parindent
+ \restorefirstparagraphindent
+ }%
+}
+
+\gdef\restorefirstparagraphindent{%
+ \global \let \indent = \ptexindent
+ \global \let \noindent = \ptexnoindent
+ \global \everypar = {}%
+}
+
+
+% @asis just yields its argument. Used with @table, for example.
+%
+\def\asis#1{#1}
+
+% @math outputs its argument in math mode.
+%
+% One complication: _ usually means subscripts, but it could also mean
+% an actual _ character, as in @math{@var{some_variable} + 1}. So make
+% _ active, and distinguish by seeing if the current family is \slfam,
+% which is what @var uses.
+{
+ \catcode`\_ = \active
+ \gdef\mathunderscore{%
+ \catcode`\_=\active
+ \def_{\ifnum\fam=\slfam \_\else\sb\fi}%
+ }
+}
+% Another complication: we want \\ (and @\) to output a \ character.
+% FYI, plain.tex uses \\ as a temporary control sequence (why?), but
+% this is not advertised and we don't care. Texinfo does not
+% otherwise define @\.
+%
+% The \mathchar is class=0=ordinary, family=7=ttfam, position=5C=\.
+\def\mathbackslash{\ifnum\fam=\ttfam \mathchar"075C \else\backslash \fi}
+%
+\def\math{%
+ \tex
+ \mathunderscore
+ \let\\ = \mathbackslash
+ \mathactive
+ $\finishmath
+}
+\def\finishmath#1{#1$\endgroup} % Close the group opened by \tex.
+
+% Some active characters (such as <) are spaced differently in math.
+% We have to reset their definitions in case the @math was an argument
+% to a command which sets the catcodes (such as @item or @section).
+%
+{
+ \catcode`^ = \active
+ \catcode`< = \active
+ \catcode`> = \active
+ \catcode`+ = \active
+ \gdef\mathactive{%
+ \let^ = \ptexhat
+ \let< = \ptexless
+ \let> = \ptexgtr
+ \let+ = \ptexplus
+ }
+}
+
+% @bullet and @minus need the same treatment as @math, just above.
+\def\bullet{$\ptexbullet$}
+\def\minus{$-$}
+
+% @dots{} outputs an ellipsis using the current font.
+% We do .5em per period so that it has the same spacing in the cm
+% typewriter fonts as three actual period characters; on the other hand,
+% in other typewriter fonts three periods are wider than 1.5em. So do
+% whichever is larger.
+%
+\def\dots{%
+ \leavevmode
+ \setbox0=\hbox{...}% get width of three periods
+ \ifdim\wd0 > 1.5em
+ \dimen0 = \wd0
+ \else
+ \dimen0 = 1.5em
+ \fi
+ \hbox to \dimen0{%
+ \hskip 0pt plus.25fil
+ .\hskip 0pt plus1fil
+ .\hskip 0pt plus1fil
+ .\hskip 0pt plus.5fil
+ }%
+}
+
+% @enddots{} is an end-of-sentence ellipsis.
+%
+\def\enddots{%
+ \dots
+ \spacefactor=\endofsentencespacefactor
+}
+
+% @comma{} is so commas can be inserted into text without messing up
+% Texinfo's parsing.
+%
+\let\comma = ,
+
+% @refill is a no-op.
+\let\refill=\relax
+
+% If working on a large document in chapters, it is convenient to
+% be able to disable indexing, cross-referencing, and contents, for test runs.
+% This is done with @novalidate (before @setfilename).
+%
+\newif\iflinks \linkstrue % by default we want the aux files.
+\let\novalidate = \linksfalse
+
+% @setfilename is done at the beginning of every texinfo file.
+% So open here the files we need to have open while reading the input.
+% This makes it possible to make a .fmt file for texinfo.
+\def\setfilename{%
+ \fixbackslash % Turn off hack to swallow `\input texinfo'.
+ \iflinks
+ \tryauxfile
+ % Open the new aux file. TeX will close it automatically at exit.
+ \immediate\openout\auxfile=\jobname.aux
+ \fi % \openindices needs to do some work in any case.
+ \openindices
+ \let\setfilename=\comment % Ignore extra @setfilename cmds.
+ %
+ % If texinfo.cnf is present on the system, read it.
+ % Useful for site-wide @afourpaper, etc.
+ \openin 1 texinfo.cnf
+ \ifeof 1 \else \input texinfo.cnf \fi
+ \closein 1
+ %
+ \comment % Ignore the actual filename.
+}
+
+% Called from \setfilename.
+%
+\def\openindices{%
+ \newindex{cp}%
+ \newcodeindex{fn}%
+ \newcodeindex{vr}%
+ \newcodeindex{tp}%
+ \newcodeindex{ky}%
+ \newcodeindex{pg}%
+}
+
+% @bye.
+\outer\def\bye{\pagealignmacro\tracingstats=1\ptexend}
+
+
+\message{pdf,}
+% adobe `portable' document format
+\newcount\tempnum
+\newcount\lnkcount
+\newtoks\filename
+\newcount\filenamelength
+\newcount\pgn
+\newtoks\toksA
+\newtoks\toksB
+\newtoks\toksC
+\newtoks\toksD
+\newbox\boxA
+\newcount\countA
+\newif\ifpdf
+\newif\ifpdfmakepagedest
+
+% when pdftex is run in dvi mode, \pdfoutput is defined (so \pdfoutput=1
+% can be set). So we test for \relax and 0 as well as \undefined,
+% borrowed from ifpdf.sty.
+\ifx\pdfoutput\undefined
+\else
+ \ifx\pdfoutput\relax
+ \else
+ \ifcase\pdfoutput
+ \else
+ \pdftrue
+ \fi
+ \fi
+\fi
+
+% PDF uses PostScript string constants for the names of xref targets,
+% for display in the outlines, and in other places. Thus, we have to
+% double any backslashes. Otherwise, a name like "\node" will be
+% interpreted as a newline (\n), followed by o, d, e. Not good.
+% http://www.ntg.nl/pipermail/ntg-pdftex/2004-July/000654.html
+% (and related messages, the final outcome is that it is up to the TeX
+% user to double the backslashes and otherwise make the string valid, so
+% that's what we do).
+
+% double active backslashes.
+%
+{\catcode`\@=0 \catcode`\\=\active
+ @gdef@activebackslashdouble{%
+ @catcode`@\=@active
+ @let\=@doublebackslash}
+}
+
+% To handle parens, we must adopt a different approach, since parens are
+% not active characters. hyperref.dtx (which has the same problem as
+% us) handles it with this amazing macro to replace tokens, with minor
+% changes for Texinfo. It is included here under the GPL by permission
+% from the author, Heiko Oberdiek.
+%
+% #1 is the tokens to replace.
+% #2 is the replacement.
+% #3 is the control sequence with the string.
+%
+\def\HyPsdSubst#1#2#3{%
+ \def\HyPsdReplace##1#1##2\END{%
+ ##1%
+ \ifx\\##2\\%
+ \else
+ #2%
+ \HyReturnAfterFi{%
+ \HyPsdReplace##2\END
+ }%
+ \fi
+ }%
+ \xdef#3{\expandafter\HyPsdReplace#3#1\END}%
+}
+\long\def\HyReturnAfterFi#1\fi{\fi#1}
+
+% #1 is a control sequence in which to do the replacements.
+\def\backslashparens#1{%
+ \xdef#1{#1}% redefine it as its expansion; the definition is simply
+ % \lastnode when called from \setref -> \pdfmkdest.
+ \HyPsdSubst{(}{\realbackslash(}{#1}%
+ \HyPsdSubst{)}{\realbackslash)}{#1}%
+}
+
+\newhelp\nopdfimagehelp{Texinfo supports .png, .jpg, .jpeg, and .pdf images
+with PDF output, and none of those formats could be found. (.eps cannot
+be supported due to the design of the PDF format; use regular TeX (DVI
+output) for that.)}
+
+\ifpdf
+ %
+ % Color manipulation macros based on pdfcolor.tex.
+ \def\cmykDarkRed{0.28 1 1 0.35}
+ \def\cmykBlack{0 0 0 1}
+ %
+ \def\pdfsetcolor#1{\pdfliteral{#1 k}}
+ % Set color, and create a mark which defines \thiscolor accordingly,
+ % so that \makeheadline knows which color to restore.
+ \def\setcolor#1{%
+ \xdef\lastcolordefs{\gdef\noexpand\thiscolor{#1}}%
+ \domark
+ \pdfsetcolor{#1}%
+ }
+ %
+ \def\maincolor{\cmykBlack}
+ \pdfsetcolor{\maincolor}
+ \edef\thiscolor{\maincolor}
+ \def\lastcolordefs{}
+ %
+ \def\makefootline{%
+ \baselineskip24pt
+ \line{\pdfsetcolor{\maincolor}\the\footline}%
+ }
+ %
+ \def\makeheadline{%
+ \vbox to 0pt{%
+ \vskip-22.5pt
+ \line{%
+ \vbox to8.5pt{}%
+ % Extract \thiscolor definition from the marks.
+ \getcolormarks
+ % Typeset the headline with \maincolor, then restore the color.
+ \pdfsetcolor{\maincolor}\the\headline\pdfsetcolor{\thiscolor}%
+ }%
+ \vss
+ }%
+ \nointerlineskip
+ }
+ %
+ %
+ \pdfcatalog{/PageMode /UseOutlines}
+ %
+ % #1 is image name, #2 width (might be empty/whitespace), #3 height (ditto).
+ \def\dopdfimage#1#2#3{%
+ \def\imagewidth{#2}\setbox0 = \hbox{\ignorespaces #2}%
+ \def\imageheight{#3}\setbox2 = \hbox{\ignorespaces #3}%
+ %
+ % pdftex (and the PDF format) support .png, .jpg, .pdf (among
+ % others). Let's try in that order.
+ \let\pdfimgext=\empty
+ \begingroup
+ \openin 1 #1.png \ifeof 1
+ \openin 1 #1.jpg \ifeof 1
+ \openin 1 #1.jpeg \ifeof 1
+ \openin 1 #1.JPG \ifeof 1
+ \openin 1 #1.pdf \ifeof 1
+ \errhelp = \nopdfimagehelp
+ \errmessage{Could not find image file #1 for pdf}%
+ \else \gdef\pdfimgext{pdf}%
+ \fi
+ \else \gdef\pdfimgext{JPG}%
+ \fi
+ \else \gdef\pdfimgext{jpeg}%
+ \fi
+ \else \gdef\pdfimgext{jpg}%
+ \fi
+ \else \gdef\pdfimgext{png}%
+ \fi
+ \closein 1
+ \endgroup
+ %
+ % without \immediate, pdftex seg faults when the same image is
+ % included twice. (Version 3.14159-pre-1.0-unofficial-20010704.)
+ \ifnum\pdftexversion < 14
+ \immediate\pdfimage
+ \else
+ \immediate\pdfximage
+ \fi
+ \ifdim \wd0 >0pt width \imagewidth \fi
+ \ifdim \wd2 >0pt height \imageheight \fi
+ \ifnum\pdftexversion<13
+ #1.\pdfimgext
+ \else
+ {#1.\pdfimgext}%
+ \fi
+ \ifnum\pdftexversion < 14 \else
+ \pdfrefximage \pdflastximage
+ \fi}
+ %
+ \def\pdfmkdest#1{{%
+ % We have to set dummies so commands such as @code, and characters
+ % such as \, aren't expanded when present in a section title.
+ \indexnofonts
+ \turnoffactive
+ \activebackslashdouble
+ \makevalueexpandable
+ \def\pdfdestname{#1}%
+ \backslashparens\pdfdestname
+ \safewhatsit{\pdfdest name{\pdfdestname} xyz}%
+ }}
+ %
+ % used to mark target names; must be expandable.
+ \def\pdfmkpgn#1{#1}
+ %
+ % by default, use a color that is dark enough to print on paper as
+ % nearly black, but still distinguishable for online viewing.
+ \def\urlcolor{\cmykDarkRed}
+ \def\linkcolor{\cmykDarkRed}
+ \def\endlink{\setcolor{\maincolor}\pdfendlink}
+ %
+ % Adding outlines to PDF; macros for calculating structure of outlines
+ % come from Petr Olsak
+ \def\expnumber#1{\expandafter\ifx\csname#1\endcsname\relax 0%
+ \else \csname#1\endcsname \fi}
+ \def\advancenumber#1{\tempnum=\expnumber{#1}\relax
+ \advance\tempnum by 1
+ \expandafter\xdef\csname#1\endcsname{\the\tempnum}}
+ %
+ % #1 is the section text, which is what will be displayed in the
+ % outline by the pdf viewer. #2 is the pdf expression for the number
+ % of subentries (or empty, for subsubsections). #3 is the node text,
+ % which might be empty if this toc entry had no corresponding node.
+ % #4 is the page number
+ %
+ \def\dopdfoutline#1#2#3#4{%
+ % Generate a link to the node text if that exists; else, use the
+ % page number. We could generate a destination for the section
+ % text in the case where a section has no node, but it doesn't
+ % seem worth the trouble, since most documents are normally structured.
+ \def\pdfoutlinedest{#3}%
+ \ifx\pdfoutlinedest\empty
+ \def\pdfoutlinedest{#4}%
+ \else
+ % Doubled backslashes in the name.
+ {\activebackslashdouble \xdef\pdfoutlinedest{#3}%
+ \backslashparens\pdfoutlinedest}%
+ \fi
+ %
+ % Also double the backslashes in the display string.
+ {\activebackslashdouble \xdef\pdfoutlinetext{#1}%
+ \backslashparens\pdfoutlinetext}%
+ %
+ \pdfoutline goto name{\pdfmkpgn{\pdfoutlinedest}}#2{\pdfoutlinetext}%
+ }
+ %
+ \def\pdfmakeoutlines{%
+ \begingroup
+ % Thanh's hack / proper braces in bookmarks
+ \edef\mylbrace{\iftrue \string{\else}\fi}\let\{=\mylbrace
+ \edef\myrbrace{\iffalse{\else\string}\fi}\let\}=\myrbrace
+ %
+ % Read toc silently, to get counts of subentries for \pdfoutline.
+ \def\numchapentry##1##2##3##4{%
+ \def\thischapnum{##2}%
+ \def\thissecnum{0}%
+ \def\thissubsecnum{0}%
+ }%
+ \def\numsecentry##1##2##3##4{%
+ \advancenumber{chap\thischapnum}%
+ \def\thissecnum{##2}%
+ \def\thissubsecnum{0}%
+ }%
+ \def\numsubsecentry##1##2##3##4{%
+ \advancenumber{sec\thissecnum}%
+ \def\thissubsecnum{##2}%
+ }%
+ \def\numsubsubsecentry##1##2##3##4{%
+ \advancenumber{subsec\thissubsecnum}%
+ }%
+ \def\thischapnum{0}%
+ \def\thissecnum{0}%
+ \def\thissubsecnum{0}%
+ %
+ % use \def rather than \let here because we redefine \chapentry et
+ % al. a second time, below.
+ \def\appentry{\numchapentry}%
+ \def\appsecentry{\numsecentry}%
+ \def\appsubsecentry{\numsubsecentry}%
+ \def\appsubsubsecentry{\numsubsubsecentry}%
+ \def\unnchapentry{\numchapentry}%
+ \def\unnsecentry{\numsecentry}%
+ \def\unnsubsecentry{\numsubsecentry}%
+ \def\unnsubsubsecentry{\numsubsubsecentry}%
+ \readdatafile{toc}%
+ %
+ % Read toc second time, this time actually producing the outlines.
+ % The `-' means take the \expnumber as the absolute number of
+ % subentries, which we calculated on our first read of the .toc above.
+ %
+ % We use the node names as the destinations.
+ \def\numchapentry##1##2##3##4{%
+ \dopdfoutline{##1}{count-\expnumber{chap##2}}{##3}{##4}}%
+ \def\numsecentry##1##2##3##4{%
+ \dopdfoutline{##1}{count-\expnumber{sec##2}}{##3}{##4}}%
+ \def\numsubsecentry##1##2##3##4{%
+ \dopdfoutline{##1}{count-\expnumber{subsec##2}}{##3}{##4}}%
+ \def\numsubsubsecentry##1##2##3##4{% count is always zero
+ \dopdfoutline{##1}{}{##3}{##4}}%
+ %
+ % PDF outlines are displayed using system fonts, instead of
+ % document fonts. Therefore we cannot use special characters,
+ % since the encoding is unknown. For example, the eogonek from
+ % Latin 2 (0xea) gets translated to a | character. Info from
+ % Staszek Wawrykiewicz, 19 Jan 2004 04:09:24 +0100.
+ %
+ % xx to do this right, we have to translate 8-bit characters to
+ % their "best" equivalent, based on the @documentencoding. Right
+ % now, I guess we'll just let the pdf reader have its way.
+ \indexnofonts
+ \setupdatafile
+ \catcode`\\=\active \otherbackslash
+ \input \tocreadfilename
+ \endgroup
+ }
+ %
+ \def\skipspaces#1{\def\PP{#1}\def\D{|}%
+ \ifx\PP\D\let\nextsp\relax
+ \else\let\nextsp\skipspaces
+ \ifx\p\space\else\addtokens{\filename}{\PP}%
+ \advance\filenamelength by 1
+ \fi
+ \fi
+ \nextsp}
+ \def\getfilename#1{\filenamelength=0\expandafter\skipspaces#1|\relax}
+ \ifnum\pdftexversion < 14
+ \let \startlink \pdfannotlink
+ \else
+ \let \startlink \pdfstartlink
+ \fi
+ % make a live url in pdf output.
+ \def\pdfurl#1{%
+ \begingroup
+ % it seems we really need yet another set of dummies; have not
+ % tried to figure out what each command should do in the context
+ % of @url. for now, just make @/ a no-op, that's the only one
+ % people have actually reported a problem with.
+ %
+ \normalturnoffactive
+ \def\@{@}%
+ \let\/=\empty
+ \makevalueexpandable
+ \leavevmode\setcolor{\urlcolor}%
+ \startlink attr{/Border [0 0 0]}%
+ user{/Subtype /Link /A << /S /URI /URI (#1) >>}%
+ \endgroup}
+ \def\pdfgettoks#1.{\setbox\boxA=\hbox{\toksA={#1.}\toksB={}\maketoks}}
+ \def\addtokens#1#2{\edef\addtoks{\noexpand#1={\the#1#2}}\addtoks}
+ \def\adn#1{\addtokens{\toksC}{#1}\global\countA=1\let\next=\maketoks}
+ \def\poptoks#1#2|ENDTOKS|{\let\first=#1\toksD={#1}\toksA={#2}}
+ \def\maketoks{%
+ \expandafter\poptoks\the\toksA|ENDTOKS|\relax
+ \ifx\first0\adn0
+ \else\ifx\first1\adn1 \else\ifx\first2\adn2 \else\ifx\first3\adn3
+ \else\ifx\first4\adn4 \else\ifx\first5\adn5 \else\ifx\first6\adn6
+ \else\ifx\first7\adn7 \else\ifx\first8\adn8 \else\ifx\first9\adn9
+ \else
+ \ifnum0=\countA\else\makelink\fi
+ \ifx\first.\let\next=\done\else
+ \let\next=\maketoks
+ \addtokens{\toksB}{\the\toksD}
+ \ifx\first,\addtokens{\toksB}{\space}\fi
+ \fi
+ \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
+ \next}
+ \def\makelink{\addtokens{\toksB}%
+ {\noexpand\pdflink{\the\toksC}}\toksC={}\global\countA=0}
+ \def\pdflink#1{%
+ \startlink attr{/Border [0 0 0]} goto name{\pdfmkpgn{#1}}
+ \setcolor{\linkcolor}#1\endlink}
+ \def\done{\edef\st{\global\noexpand\toksA={\the\toksB}}\st}
+\else
+ \let\pdfmkdest = \gobble
+ \let\pdfurl = \gobble
+ \let\endlink = \relax
+ \let\setcolor = \gobble
+ \let\pdfsetcolor = \gobble
+ \let\pdfmakeoutlines = \relax
+\fi % \ifx\pdfoutput
+
+
+\message{fonts,}
+
+% Change the current font style to #1, remembering it in \curfontstyle.
+% For now, we do not accumulate font styles: @b{@i{foo}} prints foo in
+% italics, not bold italics.
+%
+\def\setfontstyle#1{%
+ \def\curfontstyle{#1}% not as a control sequence, because we are \edef'd.
+ \csname ten#1\endcsname % change the current font
+}
+
+% Select #1 fonts with the current style.
+%
+\def\selectfonts#1{\csname #1fonts\endcsname \csname\curfontstyle\endcsname}
+
+\def\rm{\fam=0 \setfontstyle{rm}}
+\def\it{\fam=\itfam \setfontstyle{it}}
+\def\sl{\fam=\slfam \setfontstyle{sl}}
+\def\bf{\fam=\bffam \setfontstyle{bf}}\def\bfstylename{bf}
+\def\tt{\fam=\ttfam \setfontstyle{tt}}
+
+% Texinfo sort of supports the sans serif font style, which plain TeX does not.
+% So we set up a \sf.
+\newfam\sffam
+\def\sf{\fam=\sffam \setfontstyle{sf}}
+\let\li = \sf % Sometimes we call it \li, not \sf.
+
+% We don't need math for this font style.
+\def\ttsl{\setfontstyle{ttsl}}
+
+
+% Default leading.
+\newdimen\textleading \textleading = 13.2pt
+
+% Set the baselineskip to #1, and the lineskip and strut size
+% correspondingly. There is no deep meaning behind these magic numbers
+% used as factors; they just match (closely enough) what Knuth defined.
+%
+\def\lineskipfactor{.08333}
+\def\strutheightpercent{.70833}
+\def\strutdepthpercent {.29167}
+%
+% can get a sort of poor man's double spacing by redefining this.
+\def\baselinefactor{1}
+%
+\def\setleading#1{%
+ \dimen0 = #1\relax
+ \normalbaselineskip = \baselinefactor\dimen0
+ \normallineskip = \lineskipfactor\normalbaselineskip
+ \normalbaselines
+ \setbox\strutbox =\hbox{%
+ \vrule width0pt height\strutheightpercent\baselineskip
+ depth \strutdepthpercent \baselineskip
+ }%
+}
+
+% PDF CMaps. See also LaTeX's t1.cmap.
+%
+% do nothing with this by default.
+\expandafter\let\csname cmapOT1\endcsname\gobble
+\expandafter\let\csname cmapOT1IT\endcsname\gobble
+\expandafter\let\csname cmapOT1TT\endcsname\gobble
+
+% if we are producing pdf, and we have \pdffontattr, then define cmaps.
+% (\pdffontattr was introduced many years ago, but people still run
+% older pdftex's; it's easy to conditionalize, so we do.)
+\ifpdf \ifx\pdffontattr\undefined \else
+ \begingroup
+ \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
+ \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
+%%DocumentNeededResources: ProcSet (CIDInit)
+%%IncludeResource: ProcSet (CIDInit)
+%%BeginResource: CMap (TeX-OT1-0)
+%%Title: (TeX-OT1-0 TeX OT1 0)
+%%Version: 1.000
+%%EndComments
+/CIDInit /ProcSet findresource begin
+12 dict begin
+begincmap
+/CIDSystemInfo
+<< /Registry (TeX)
+/Ordering (OT1)
+/Supplement 0
+>> def
+/CMapName /TeX-OT1-0 def
+/CMapType 2 def
+1 begincodespacerange
+<00> <7F>
+endcodespacerange
+8 beginbfrange
+<00> <01> <0393>
+<09> <0A> <03A8>
+<23> <26> <0023>
+<28> <3B> <0028>
+<3F> <5B> <003F>
+<5D> <5E> <005D>
+<61> <7A> <0061>
+<7B> <7C> <2013>
+endbfrange
+40 beginbfchar
+<02> <0398>
+<03> <039B>
+<04> <039E>
+<05> <03A0>
+<06> <03A3>
+<07> <03D2>
+<08> <03A6>
+<0B> <00660066>
+<0C> <00660069>
+<0D> <0066006C>
+<0E> <006600660069>
+<0F> <00660066006C>
+<10> <0131>
+<11> <0237>
+<12> <0060>
+<13> <00B4>
+<14> <02C7>
+<15> <02D8>
+<16> <00AF>
+<17> <02DA>
+<18> <00B8>
+<19> <00DF>
+<1A> <00E6>
+<1B> <0153>
+<1C> <00F8>
+<1D> <00C6>
+<1E> <0152>
+<1F> <00D8>
+<21> <0021>
+<22> <201D>
+<27> <2019>
+<3C> <00A1>
+<3D> <003D>
+<3E> <00BF>
+<5C> <201C>
+<5F> <02D9>
+<60> <2018>
+<7D> <02DD>
+<7E> <007E>
+<7F> <00A8>
+endbfchar
+endcmap
+CMapName currentdict /CMap defineresource pop
+end
+end
+%%EndResource
+%%EOF
+ }\endgroup
+ \expandafter\edef\csname cmapOT1\endcsname#1{%
+ \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
+ }%
+%
+% \cmapOT1IT
+ \begingroup
+ \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
+ \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
+%%DocumentNeededResources: ProcSet (CIDInit)
+%%IncludeResource: ProcSet (CIDInit)
+%%BeginResource: CMap (TeX-OT1IT-0)
+%%Title: (TeX-OT1IT-0 TeX OT1IT 0)
+%%Version: 1.000
+%%EndComments
+/CIDInit /ProcSet findresource begin
+12 dict begin
+begincmap
+/CIDSystemInfo
+<< /Registry (TeX)
+/Ordering (OT1IT)
+/Supplement 0
+>> def
+/CMapName /TeX-OT1IT-0 def
+/CMapType 2 def
+1 begincodespacerange
+<00> <7F>
+endcodespacerange
+8 beginbfrange
+<00> <01> <0393>
+<09> <0A> <03A8>
+<25> <26> <0025>
+<28> <3B> <0028>
+<3F> <5B> <003F>
+<5D> <5E> <005D>
+<61> <7A> <0061>
+<7B> <7C> <2013>
+endbfrange
+42 beginbfchar
+<02> <0398>
+<03> <039B>
+<04> <039E>
+<05> <03A0>
+<06> <03A3>
+<07> <03D2>
+<08> <03A6>
+<0B> <00660066>
+<0C> <00660069>
+<0D> <0066006C>
+<0E> <006600660069>
+<0F> <00660066006C>
+<10> <0131>
+<11> <0237>
+<12> <0060>
+<13> <00B4>
+<14> <02C7>
+<15> <02D8>
+<16> <00AF>
+<17> <02DA>
+<18> <00B8>
+<19> <00DF>
+<1A> <00E6>
+<1B> <0153>
+<1C> <00F8>
+<1D> <00C6>
+<1E> <0152>
+<1F> <00D8>
+<21> <0021>
+<22> <201D>
+<23> <0023>
+<24> <00A3>
+<27> <2019>
+<3C> <00A1>
+<3D> <003D>
+<3E> <00BF>
+<5C> <201C>
+<5F> <02D9>
+<60> <2018>
+<7D> <02DD>
+<7E> <007E>
+<7F> <00A8>
+endbfchar
+endcmap
+CMapName currentdict /CMap defineresource pop
+end
+end
+%%EndResource
+%%EOF
+ }\endgroup
+ \expandafter\edef\csname cmapOT1IT\endcsname#1{%
+ \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
+ }%
+%
+% \cmapOT1TT
+ \begingroup
+ \catcode`\^^M=\active \def^^M{^^J}% Output line endings as the ^^J char.
+ \catcode`\%=12 \immediate\pdfobj stream {%!PS-Adobe-3.0 Resource-CMap
+%%DocumentNeededResources: ProcSet (CIDInit)
+%%IncludeResource: ProcSet (CIDInit)
+%%BeginResource: CMap (TeX-OT1TT-0)
+%%Title: (TeX-OT1TT-0 TeX OT1TT 0)
+%%Version: 1.000
+%%EndComments
+/CIDInit /ProcSet findresource begin
+12 dict begin
+begincmap
+/CIDSystemInfo
+<< /Registry (TeX)
+/Ordering (OT1TT)
+/Supplement 0
+>> def
+/CMapName /TeX-OT1TT-0 def
+/CMapType 2 def
+1 begincodespacerange
+<00> <7F>
+endcodespacerange
+5 beginbfrange
+<00> <01> <0393>
+<09> <0A> <03A8>
+<21> <26> <0021>
+<28> <5F> <0028>
+<61> <7E> <0061>
+endbfrange
+32 beginbfchar
+<02> <0398>
+<03> <039B>
+<04> <039E>
+<05> <03A0>
+<06> <03A3>
+<07> <03D2>
+<08> <03A6>
+<0B> <2191>
+<0C> <2193>
+<0D> <0027>
+<0E> <00A1>
+<0F> <00BF>
+<10> <0131>
+<11> <0237>
+<12> <0060>
+<13> <00B4>
+<14> <02C7>
+<15> <02D8>
+<16> <00AF>
+<17> <02DA>
+<18> <00B8>
+<19> <00DF>
+<1A> <00E6>
+<1B> <0153>
+<1C> <00F8>
+<1D> <00C6>
+<1E> <0152>
+<1F> <00D8>
+<20> <2423>
+<27> <2019>
+<60> <2018>
+<7F> <00A8>
+endbfchar
+endcmap
+CMapName currentdict /CMap defineresource pop
+end
+end
+%%EndResource
+%%EOF
+ }\endgroup
+ \expandafter\edef\csname cmapOT1TT\endcsname#1{%
+ \pdffontattr#1{/ToUnicode \the\pdflastobj\space 0 R}%
+ }%
+\fi\fi
+
+
+% Set the font macro #1 to the font named #2, adding on the
+% specified font prefix (normally `cm').
+% #3 is the font's design size, #4 is a scale factor, #5 is the CMap
+% encoding (currently only OT1, OT1IT and OT1TT are allowed, pass
+% empty to omit).
+\def\setfont#1#2#3#4#5{%
+ \font#1=\fontprefix#2#3 scaled #4
+ \csname cmap#5\endcsname#1%
+}
+% This is what gets called when #5 of \setfont is empty.
+\let\cmap\gobble
+% emacs-page end of cmaps
+
+% Use cm as the default font prefix.
+% To specify the font prefix, you must define \fontprefix
+% before you read in texinfo.tex.
+\ifx\fontprefix\undefined
+\def\fontprefix{cm}
+\fi
+% Support font families that don't use the same naming scheme as CM.
+\def\rmshape{r}
+\def\rmbshape{bx} %where the normal face is bold
+\def\bfshape{b}
+\def\bxshape{bx}
+\def\ttshape{tt}
+\def\ttbshape{tt}
+\def\ttslshape{sltt}
+\def\itshape{ti}
+\def\itbshape{bxti}
+\def\slshape{sl}
+\def\slbshape{bxsl}
+\def\sfshape{ss}
+\def\sfbshape{ss}
+\def\scshape{csc}
+\def\scbshape{csc}
+
+% Definitions for a main text size of 11pt. This is the default in
+% Texinfo.
+%
+\def\definetextfontsizexi{%
+% Text fonts (11.2pt, magstep1).
+\def\textnominalsize{11pt}
+\edef\mainmagstep{\magstephalf}
+\setfont\textrm\rmshape{10}{\mainmagstep}{OT1}
+\setfont\texttt\ttshape{10}{\mainmagstep}{OT1TT}
+\setfont\textbf\bfshape{10}{\mainmagstep}{OT1}
+\setfont\textit\itshape{10}{\mainmagstep}{OT1IT}
+\setfont\textsl\slshape{10}{\mainmagstep}{OT1}
+\setfont\textsf\sfshape{10}{\mainmagstep}{OT1}
+\setfont\textsc\scshape{10}{\mainmagstep}{OT1}
+\setfont\textttsl\ttslshape{10}{\mainmagstep}{OT1TT}
+\font\texti=cmmi10 scaled \mainmagstep
+\font\textsy=cmsy10 scaled \mainmagstep
+\def\textecsize{1095}
+
+% A few fonts for @defun names and args.
+\setfont\defbf\bfshape{10}{\magstep1}{OT1}
+\setfont\deftt\ttshape{10}{\magstep1}{OT1TT}
+\setfont\defttsl\ttslshape{10}{\magstep1}{OT1TT}
+\def\df{\let\tentt=\deftt \let\tenbf = \defbf \let\tenttsl=\defttsl \bf}
+
+% Fonts for indices, footnotes, small examples (9pt).
+\def\smallnominalsize{9pt}
+\setfont\smallrm\rmshape{9}{1000}{OT1}
+\setfont\smalltt\ttshape{9}{1000}{OT1TT}
+\setfont\smallbf\bfshape{10}{900}{OT1}
+\setfont\smallit\itshape{9}{1000}{OT1IT}
+\setfont\smallsl\slshape{9}{1000}{OT1}
+\setfont\smallsf\sfshape{9}{1000}{OT1}
+\setfont\smallsc\scshape{10}{900}{OT1}
+\setfont\smallttsl\ttslshape{10}{900}{OT1TT}
+\font\smalli=cmmi9
+\font\smallsy=cmsy9
+\def\smallecsize{0900}
+
+% Fonts for small examples (8pt).
+\def\smallernominalsize{8pt}
+\setfont\smallerrm\rmshape{8}{1000}{OT1}
+\setfont\smallertt\ttshape{8}{1000}{OT1TT}
+\setfont\smallerbf\bfshape{10}{800}{OT1}
+\setfont\smallerit\itshape{8}{1000}{OT1IT}
+\setfont\smallersl\slshape{8}{1000}{OT1}
+\setfont\smallersf\sfshape{8}{1000}{OT1}
+\setfont\smallersc\scshape{10}{800}{OT1}
+\setfont\smallerttsl\ttslshape{10}{800}{OT1TT}
+\font\smalleri=cmmi8
+\font\smallersy=cmsy8
+\def\smallerecsize{0800}
+
+% Fonts for title page (20.4pt):
+\def\titlenominalsize{20pt}
+\setfont\titlerm\rmbshape{12}{\magstep3}{OT1}
+\setfont\titleit\itbshape{10}{\magstep4}{OT1IT}
+\setfont\titlesl\slbshape{10}{\magstep4}{OT1}
+\setfont\titlett\ttbshape{12}{\magstep3}{OT1TT}
+\setfont\titlettsl\ttslshape{10}{\magstep4}{OT1TT}
+\setfont\titlesf\sfbshape{17}{\magstep1}{OT1}
+\let\titlebf=\titlerm
+\setfont\titlesc\scbshape{10}{\magstep4}{OT1}
+\font\titlei=cmmi12 scaled \magstep3
+\font\titlesy=cmsy10 scaled \magstep4
+\def\authorrm{\secrm}
+\def\authortt{\sectt}
+\def\titleecsize{2074}
+
+% Chapter (and unnumbered) fonts (17.28pt).
+\def\chapnominalsize{17pt}
+\setfont\chaprm\rmbshape{12}{\magstep2}{OT1}
+\setfont\chapit\itbshape{10}{\magstep3}{OT1IT}
+\setfont\chapsl\slbshape{10}{\magstep3}{OT1}
+\setfont\chaptt\ttbshape{12}{\magstep2}{OT1TT}
+\setfont\chapttsl\ttslshape{10}{\magstep3}{OT1TT}
+\setfont\chapsf\sfbshape{17}{1000}{OT1}
+\let\chapbf=\chaprm
+\setfont\chapsc\scbshape{10}{\magstep3}{OT1}
+\font\chapi=cmmi12 scaled \magstep2
+\font\chapsy=cmsy10 scaled \magstep3
+\def\chapecsize{1728}
+
+% Section fonts (14.4pt).
+\def\secnominalsize{14pt}
+\setfont\secrm\rmbshape{12}{\magstep1}{OT1}
+\setfont\secit\itbshape{10}{\magstep2}{OT1IT}
+\setfont\secsl\slbshape{10}{\magstep2}{OT1}
+\setfont\sectt\ttbshape{12}{\magstep1}{OT1TT}
+\setfont\secttsl\ttslshape{10}{\magstep2}{OT1TT}
+\setfont\secsf\sfbshape{12}{\magstep1}{OT1}
+\let\secbf\secrm
+\setfont\secsc\scbshape{10}{\magstep2}{OT1}
+\font\seci=cmmi12 scaled \magstep1
+\font\secsy=cmsy10 scaled \magstep2
+\def\sececsize{1440}
+
+% Subsection fonts (13.15pt).
+\def\ssecnominalsize{13pt}
+\setfont\ssecrm\rmbshape{12}{\magstephalf}{OT1}
+\setfont\ssecit\itbshape{10}{1315}{OT1IT}
+\setfont\ssecsl\slbshape{10}{1315}{OT1}
+\setfont\ssectt\ttbshape{12}{\magstephalf}{OT1TT}
+\setfont\ssecttsl\ttslshape{10}{1315}{OT1TT}
+\setfont\ssecsf\sfbshape{12}{\magstephalf}{OT1}
+\let\ssecbf\ssecrm
+\setfont\ssecsc\scbshape{10}{1315}{OT1}
+\font\sseci=cmmi12 scaled \magstephalf
+\font\ssecsy=cmsy10 scaled 1315
+\def\ssececsize{1200}
+
+% Reduced fonts for @acro in text (10pt).
+\def\reducednominalsize{10pt}
+\setfont\reducedrm\rmshape{10}{1000}{OT1}
+\setfont\reducedtt\ttshape{10}{1000}{OT1TT}
+\setfont\reducedbf\bfshape{10}{1000}{OT1}
+\setfont\reducedit\itshape{10}{1000}{OT1IT}
+\setfont\reducedsl\slshape{10}{1000}{OT1}
+\setfont\reducedsf\sfshape{10}{1000}{OT1}
+\setfont\reducedsc\scshape{10}{1000}{OT1}
+\setfont\reducedttsl\ttslshape{10}{1000}{OT1TT}
+\font\reducedi=cmmi10
+\font\reducedsy=cmsy10
+\def\reducedecsize{1000}
+
+% reset the current fonts
+\textfonts
+\rm
+} % end of 11pt text font size definitions
+
+
+% Definitions to make the main text be 10pt Computer Modern, with
+% section, chapter, etc., sizes following suit. This is for the GNU
+% Press printing of the Emacs 22 manual. Maybe other manuals in the
+% future. Used with @smallbook, which sets the leading to 12pt.
+%
+\def\definetextfontsizex{%
+% Text fonts (10pt).
+\def\textnominalsize{10pt}
+\edef\mainmagstep{1000}
+\setfont\textrm\rmshape{10}{\mainmagstep}{OT1}
+\setfont\texttt\ttshape{10}{\mainmagstep}{OT1TT}
+\setfont\textbf\bfshape{10}{\mainmagstep}{OT1}
+\setfont\textit\itshape{10}{\mainmagstep}{OT1IT}
+\setfont\textsl\slshape{10}{\mainmagstep}{OT1}
+\setfont\textsf\sfshape{10}{\mainmagstep}{OT1}
+\setfont\textsc\scshape{10}{\mainmagstep}{OT1}
+\setfont\textttsl\ttslshape{10}{\mainmagstep}{OT1TT}
+\font\texti=cmmi10 scaled \mainmagstep
+\font\textsy=cmsy10 scaled \mainmagstep
+\def\textecsize{1000}
+
+% A few fonts for @defun names and args.
+\setfont\defbf\bfshape{10}{\magstephalf}{OT1}
+\setfont\deftt\ttshape{10}{\magstephalf}{OT1TT}
+\setfont\defttsl\ttslshape{10}{\magstephalf}{OT1TT}
+\def\df{\let\tentt=\deftt \let\tenbf = \defbf \let\tenttsl=\defttsl \bf}
+
+% Fonts for indices, footnotes, small examples (9pt).
+\def\smallnominalsize{9pt}
+\setfont\smallrm\rmshape{9}{1000}{OT1}
+\setfont\smalltt\ttshape{9}{1000}{OT1TT}
+\setfont\smallbf\bfshape{10}{900}{OT1}
+\setfont\smallit\itshape{9}{1000}{OT1IT}
+\setfont\smallsl\slshape{9}{1000}{OT1}
+\setfont\smallsf\sfshape{9}{1000}{OT1}
+\setfont\smallsc\scshape{10}{900}{OT1}
+\setfont\smallttsl\ttslshape{10}{900}{OT1TT}
+\font\smalli=cmmi9
+\font\smallsy=cmsy9
+\def\smallecsize{0900}
+
+% Fonts for small examples (8pt).
+\def\smallernominalsize{8pt}
+\setfont\smallerrm\rmshape{8}{1000}{OT1}
+\setfont\smallertt\ttshape{8}{1000}{OT1TT}
+\setfont\smallerbf\bfshape{10}{800}{OT1}
+\setfont\smallerit\itshape{8}{1000}{OT1IT}
+\setfont\smallersl\slshape{8}{1000}{OT1}
+\setfont\smallersf\sfshape{8}{1000}{OT1}
+\setfont\smallersc\scshape{10}{800}{OT1}
+\setfont\smallerttsl\ttslshape{10}{800}{OT1TT}
+\font\smalleri=cmmi8
+\font\smallersy=cmsy8
+\def\smallerecsize{0800}
+
+% Fonts for title page (20.4pt):
+\def\titlenominalsize{20pt}
+\setfont\titlerm\rmbshape{12}{\magstep3}{OT1}
+\setfont\titleit\itbshape{10}{\magstep4}{OT1IT}
+\setfont\titlesl\slbshape{10}{\magstep4}{OT1}
+\setfont\titlett\ttbshape{12}{\magstep3}{OT1TT}
+\setfont\titlettsl\ttslshape{10}{\magstep4}{OT1TT}
+\setfont\titlesf\sfbshape{17}{\magstep1}{OT1}
+\let\titlebf=\titlerm
+\setfont\titlesc\scbshape{10}{\magstep4}{OT1}
+\font\titlei=cmmi12 scaled \magstep3
+\font\titlesy=cmsy10 scaled \magstep4
+\def\authorrm{\secrm}
+\def\authortt{\sectt}
+\def\titleecsize{2074}
+
+% Chapter fonts (14.4pt).
+\def\chapnominalsize{14pt}
+\setfont\chaprm\rmbshape{12}{\magstep1}{OT1}
+\setfont\chapit\itbshape{10}{\magstep2}{OT1IT}
+\setfont\chapsl\slbshape{10}{\magstep2}{OT1}
+\setfont\chaptt\ttbshape{12}{\magstep1}{OT1TT}
+\setfont\chapttsl\ttslshape{10}{\magstep2}{OT1TT}
+\setfont\chapsf\sfbshape{12}{\magstep1}{OT1}
+\let\chapbf\chaprm
+\setfont\chapsc\scbshape{10}{\magstep2}{OT1}
+\font\chapi=cmmi12 scaled \magstep1
+\font\chapsy=cmsy10 scaled \magstep2
+\def\chapecsize{1440}
+
+% Section fonts (12pt).
+\def\secnominalsize{12pt}
+\setfont\secrm\rmbshape{12}{1000}{OT1}
+\setfont\secit\itbshape{10}{\magstep1}{OT1IT}
+\setfont\secsl\slbshape{10}{\magstep1}{OT1}
+\setfont\sectt\ttbshape{12}{1000}{OT1TT}
+\setfont\secttsl\ttslshape{10}{\magstep1}{OT1TT}
+\setfont\secsf\sfbshape{12}{1000}{OT1}
+\let\secbf\secrm
+\setfont\secsc\scbshape{10}{\magstep1}{OT1}
+\font\seci=cmmi12
+\font\secsy=cmsy10 scaled \magstep1
+\def\sececsize{1200}
+
+% Subsection fonts (10pt).
+\def\ssecnominalsize{10pt}
+\setfont\ssecrm\rmbshape{10}{1000}{OT1}
+\setfont\ssecit\itbshape{10}{1000}{OT1IT}
+\setfont\ssecsl\slbshape{10}{1000}{OT1}
+\setfont\ssectt\ttbshape{10}{1000}{OT1TT}
+\setfont\ssecttsl\ttslshape{10}{1000}{OT1TT}
+\setfont\ssecsf\sfbshape{10}{1000}{OT1}
+\let\ssecbf\ssecrm
+\setfont\ssecsc\scbshape{10}{1000}{OT1}
+\font\sseci=cmmi10
+\font\ssecsy=cmsy10
+\def\ssececsize{1000}
+
+% Reduced fonts for @acro in text (9pt).
+\def\reducednominalsize{9pt}
+\setfont\reducedrm\rmshape{9}{1000}{OT1}
+\setfont\reducedtt\ttshape{9}{1000}{OT1TT}
+\setfont\reducedbf\bfshape{10}{900}{OT1}
+\setfont\reducedit\itshape{9}{1000}{OT1IT}
+\setfont\reducedsl\slshape{9}{1000}{OT1}
+\setfont\reducedsf\sfshape{9}{1000}{OT1}
+\setfont\reducedsc\scshape{10}{900}{OT1}
+\setfont\reducedttsl\ttslshape{10}{900}{OT1TT}
+\font\reducedi=cmmi9
+\font\reducedsy=cmsy9
+\def\reducedecsize{0900}
+
+% reduce space between paragraphs
+\divide\parskip by 2
+
+% reset the current fonts
+\textfonts
+\rm
+} % end of 10pt text font size definitions
+
+
+% We provide the user-level command
+% @fonttextsize 10
+% (or 11) to redefine the text font size. pt is assumed.
+%
+\def\xword{10}
+\def\xiword{11}
+%
+\parseargdef\fonttextsize{%
+ \def\textsizearg{#1}%
+ \wlog{doing @fonttextsize \textsizearg}%
+ %
+ % Set \globaldefs so that documents can use this inside @tex, since
+ % makeinfo 4.8 does not support it, but we need it nonetheless.
+ %
+ \begingroup \globaldefs=1
+ \ifx\textsizearg\xword \definetextfontsizex
+ \else \ifx\textsizearg\xiword \definetextfontsizexi
+ \else
+ \errhelp=\EMsimple
+ \errmessage{@fonttextsize only supports `10' or `11', not `\textsizearg'}
+ \fi\fi
+ \endgroup
+}
+
+
+% In order for the font changes to affect most math symbols and letters,
+% we have to define the \textfont of the standard families. Since
+% texinfo doesn't allow for producing subscripts and superscripts except
+% in the main text, we don't bother to reset \scriptfont and
+% \scriptscriptfont (which would also require loading a lot more fonts).
+%
+\def\resetmathfonts{%
+ \textfont0=\tenrm \textfont1=\teni \textfont2=\tensy
+ \textfont\itfam=\tenit \textfont\slfam=\tensl \textfont\bffam=\tenbf
+ \textfont\ttfam=\tentt \textfont\sffam=\tensf
+}
+
+% The font-changing commands redefine the meanings of \tenSTYLE, instead
+% of just \STYLE. We do this because \STYLE needs to also set the
+% current \fam for math mode. Our \STYLE (e.g., \rm) commands hardwire
+% \tenSTYLE to set the current font.
+%
+% Each font-changing command also sets the names \lsize (one size lower)
+% and \lllsize (three sizes lower). These relative commands are used in
+% the LaTeX logo and acronyms.
+%
+% This all needs generalizing, badly.
+%
+\def\textfonts{%
+ \let\tenrm=\textrm \let\tenit=\textit \let\tensl=\textsl
+ \let\tenbf=\textbf \let\tentt=\texttt \let\smallcaps=\textsc
+ \let\tensf=\textsf \let\teni=\texti \let\tensy=\textsy
+ \let\tenttsl=\textttsl
+ \def\curfontsize{text}%
+ \def\lsize{reduced}\def\lllsize{smaller}%
+ \resetmathfonts \setleading{\textleading}}
+\def\titlefonts{%
+ \let\tenrm=\titlerm \let\tenit=\titleit \let\tensl=\titlesl
+ \let\tenbf=\titlebf \let\tentt=\titlett \let\smallcaps=\titlesc
+ \let\tensf=\titlesf \let\teni=\titlei \let\tensy=\titlesy
+ \let\tenttsl=\titlettsl
+ \def\curfontsize{title}%
+ \def\lsize{chap}\def\lllsize{subsec}%
+ \resetmathfonts \setleading{25pt}}
+\def\titlefont#1{{\titlefonts\rm #1}}
+\def\chapfonts{%
+ \let\tenrm=\chaprm \let\tenit=\chapit \let\tensl=\chapsl
+ \let\tenbf=\chapbf \let\tentt=\chaptt \let\smallcaps=\chapsc
+ \let\tensf=\chapsf \let\teni=\chapi \let\tensy=\chapsy
+ \let\tenttsl=\chapttsl
+ \def\curfontsize{chap}%
+ \def\lsize{sec}\def\lllsize{text}%
+ \resetmathfonts \setleading{19pt}}
+\def\secfonts{%
+ \let\tenrm=\secrm \let\tenit=\secit \let\tensl=\secsl
+ \let\tenbf=\secbf \let\tentt=\sectt \let\smallcaps=\secsc
+ \let\tensf=\secsf \let\teni=\seci \let\tensy=\secsy
+ \let\tenttsl=\secttsl
+ \def\curfontsize{sec}%
+ \def\lsize{subsec}\def\lllsize{reduced}%
+ \resetmathfonts \setleading{16pt}}
+\def\subsecfonts{%
+ \let\tenrm=\ssecrm \let\tenit=\ssecit \let\tensl=\ssecsl
+ \let\tenbf=\ssecbf \let\tentt=\ssectt \let\smallcaps=\ssecsc
+ \let\tensf=\ssecsf \let\teni=\sseci \let\tensy=\ssecsy
+ \let\tenttsl=\ssecttsl
+ \def\curfontsize{ssec}%
+ \def\lsize{text}\def\lllsize{small}%
+ \resetmathfonts \setleading{15pt}}
+\let\subsubsecfonts = \subsecfonts
+\def\reducedfonts{%
+ \let\tenrm=\reducedrm \let\tenit=\reducedit \let\tensl=\reducedsl
+ \let\tenbf=\reducedbf \let\tentt=\reducedtt \let\reducedcaps=\reducedsc
+ \let\tensf=\reducedsf \let\teni=\reducedi \let\tensy=\reducedsy
+ \let\tenttsl=\reducedttsl
+ \def\curfontsize{reduced}%
+ \def\lsize{small}\def\lllsize{smaller}%
+ \resetmathfonts \setleading{10.5pt}}
+\def\smallfonts{%
+ \let\tenrm=\smallrm \let\tenit=\smallit \let\tensl=\smallsl
+ \let\tenbf=\smallbf \let\tentt=\smalltt \let\smallcaps=\smallsc
+ \let\tensf=\smallsf \let\teni=\smalli \let\tensy=\smallsy
+ \let\tenttsl=\smallttsl
+ \def\curfontsize{small}%
+ \def\lsize{smaller}\def\lllsize{smaller}%
+ \resetmathfonts \setleading{10.5pt}}
+\def\smallerfonts{%
+ \let\tenrm=\smallerrm \let\tenit=\smallerit \let\tensl=\smallersl
+ \let\tenbf=\smallerbf \let\tentt=\smallertt \let\smallcaps=\smallersc
+ \let\tensf=\smallersf \let\teni=\smalleri \let\tensy=\smallersy
+ \let\tenttsl=\smallerttsl
+ \def\curfontsize{smaller}%
+ \def\lsize{smaller}\def\lllsize{smaller}%
+ \resetmathfonts \setleading{9.5pt}}
+
+% Set the fonts to use with the @small... environments.
+\let\smallexamplefonts = \smallfonts
+
+% About \smallexamplefonts. If we use \smallfonts (9pt), @smallexample
+% can fit this many characters:
+% 8.5x11=86 smallbook=72 a4=90 a5=69
+% If we use \scriptfonts (8pt), then we can fit this many characters:
+% 8.5x11=90+ smallbook=80 a4=90+ a5=77
+% For me, subjectively, the few extra characters that fit aren't worth
+% the additional smallness of 8pt. So I'm making the default 9pt.
+%
+% By the way, for comparison, here's what fits with @example (10pt):
+% 8.5x11=71 smallbook=60 a4=75 a5=58
+%
+% I wish the USA used A4 paper.
+% --karl, 24jan03.
+
+
+% Set up the default fonts, so we can use them for creating boxes.
+%
+\definetextfontsizexi
+
+% Define these so they can be easily changed for other fonts.
+\def\angleleft{$\langle$}
+\def\angleright{$\rangle$}
+
+% Count depth in font-changes, for error checks
+\newcount\fontdepth \fontdepth=0
+
+% Fonts for short table of contents.
+\setfont\shortcontrm\rmshape{12}{1000}{OT1}
+\setfont\shortcontbf\bfshape{10}{\magstep1}{OT1} % no cmb12
+\setfont\shortcontsl\slshape{12}{1000}{OT1}
+\setfont\shortconttt\ttshape{12}{1000}{OT1TT}
+
+%% Add scribe-like font environments, plus @l for inline lisp (usually sans
+%% serif) and @ii for TeX italic
+
+% \smartitalic{ARG} outputs arg in italics, followed by an italic correction
+% unless the following character is such as not to need one.
+\def\smartitalicx{\ifx\next,\else\ifx\next-\else\ifx\next.\else
+ \ptexslash\fi\fi\fi}
+\def\smartslanted#1{{\ifusingtt\ttsl\sl #1}\futurelet\next\smartitalicx}
+\def\smartitalic#1{{\ifusingtt\ttsl\it #1}\futurelet\next\smartitalicx}
+
+% like \smartslanted except unconditionally uses \ttsl.
+% @var is set to this for defun arguments.
+\def\ttslanted#1{{\ttsl #1}\futurelet\next\smartitalicx}
+
+% like \smartslanted except unconditionally use \sl. We never want
+% ttsl for book titles, do we?
+\def\cite#1{{\sl #1}\futurelet\next\smartitalicx}
+
+\let\i=\smartitalic
+\let\slanted=\smartslanted
+\let\var=\smartslanted
+\let\dfn=\smartslanted
+\let\emph=\smartitalic
+
+% @b, explicit bold.
+\def\b#1{{\bf #1}}
+\let\strong=\b
+
+% @sansserif, explicit sans.
+\def\sansserif#1{{\sf #1}}
+
+% We can't just use \exhyphenpenalty, because that only has effect at
+% the end of a paragraph. Restore normal hyphenation at the end of the
+% group within which \nohyphenation is presumably called.
+%
+\def\nohyphenation{\hyphenchar\font = -1 \aftergroup\restorehyphenation}
+\def\restorehyphenation{\hyphenchar\font = `- }
+
+% Set sfcode to normal for the chars that usually have another value.
+% Can't use plain's \frenchspacing because it uses the `\x notation, and
+% sometimes \x has an active definition that messes things up.
+%
+\catcode`@=11
+ \def\plainfrenchspacing{%
+ \sfcode\dotChar =\@m \sfcode\questChar=\@m \sfcode\exclamChar=\@m
+ \sfcode\colonChar=\@m \sfcode\semiChar =\@m \sfcode\commaChar =\@m
+ \def\endofsentencespacefactor{1000}% for @. and friends
+ }
+ \def\plainnonfrenchspacing{%
+ \sfcode`\.3000\sfcode`\?3000\sfcode`\!3000
+ \sfcode`\:2000\sfcode`\;1500\sfcode`\,1250
+ \def\endofsentencespacefactor{3000}% for @. and friends
+ }
+\catcode`@=\other
+\def\endofsentencespacefactor{3000}% default
+
+\def\t#1{%
+ {\tt \rawbackslash \plainfrenchspacing #1}%
+ \null
+}
+\def\samp#1{`\tclose{#1}'\null}
+\setfont\keyrm\rmshape{8}{1000}{OT1}
+\font\keysy=cmsy9
+\def\key#1{{\keyrm\textfont2=\keysy \leavevmode\hbox{%
+ \raise0.4pt\hbox{\angleleft}\kern-.08em\vtop{%
+ \vbox{\hrule\kern-0.4pt
+ \hbox{\raise0.4pt\hbox{\vphantom{\angleleft}}#1}}%
+ \kern-0.4pt\hrule}%
+ \kern-.06em\raise0.4pt\hbox{\angleright}}}}
+\def\key #1{{\nohyphenation \uppercase{#1}}\null}
+% The old definition, with no lozenge:
+%\def\key #1{{\ttsl \nohyphenation \uppercase{#1}}\null}
+\def\ctrl #1{{\tt \rawbackslash \hat}#1}
+
+% @file, @option are the same as @samp.
+\let\file=\samp
+\let\option=\samp
+
+% @code is a modification of @t,
+% which makes spaces the same size as normal in the surrounding text.
+\def\tclose#1{%
+ {%
+ % Change normal interword space to be same as for the current font.
+ \spaceskip = \fontdimen2\font
+ %
+ % Switch to typewriter.
+ \tt
+ %
+ % But `\ ' produces the large typewriter interword space.
+ \def\ {{\spaceskip = 0pt{} }}%
+ %
+ % Turn off hyphenation.
+ \nohyphenation
+ %
+ \rawbackslash
+ \plainfrenchspacing
+ #1%
+ }%
+ \null
+}
+
+% We *must* turn on hyphenation at `-' and `_' in @code.
+% Otherwise, it is too hard to avoid overfull hboxes
+% in the Emacs manual, the Library manual, etc.
+
+% Unfortunately, TeX uses one parameter (\hyphenchar) to control
+% both hyphenation at - and hyphenation within words.
+% We must therefore turn them both off (\tclose does that)
+% and arrange explicitly to hyphenate at a dash.
+% -- rms.
+{
+ \catcode`\-=\active \catcode`\_=\active
+ \catcode`\'=\active \catcode`\`=\active
+ %
+ \global\def\code{\begingroup
+ \catcode\rquoteChar=\active \catcode\lquoteChar=\active
+ \let'\codequoteright \let`\codequoteleft
+ %
+ \catcode\dashChar=\active \catcode\underChar=\active
+ \ifallowcodebreaks
+ \let-\codedash
+ \let_\codeunder
+ \else
+ \let-\realdash
+ \let_\realunder
+ \fi
+ \codex
+ }
+}
+
+\def\realdash{-}
+\def\codedash{-\discretionary{}{}{}}
+\def\codeunder{%
+ % this is all so @math{@code{var_name}+1} can work. In math mode, _
+ % is "active" (mathcode"8000) and \normalunderscore (or \char95, etc.)
+ % will therefore expand the active definition of _, which is us
+ % (inside @code that is), therefore an endless loop.
+ \ifusingtt{\ifmmode
+ \mathchar"075F % class 0=ordinary, family 7=ttfam, pos 0x5F=_.
+ \else\normalunderscore \fi
+ \discretionary{}{}{}}%
+ {\_}%
+}
+\def\codex #1{\tclose{#1}\endgroup}
+
+% An additional complication: the above will allow breaks after, e.g.,
+% each of the four underscores in __typeof__. This is undesirable in
+% some manuals, especially if they don't have long identifiers in
+% general. @allowcodebreaks provides a way to control this.
+%
+\newif\ifallowcodebreaks \allowcodebreakstrue
+
+\def\keywordtrue{true}
+\def\keywordfalse{false}
+
+\parseargdef\allowcodebreaks{%
+ \def\txiarg{#1}%
+ \ifx\txiarg\keywordtrue
+ \allowcodebreakstrue
+ \else\ifx\txiarg\keywordfalse
+ \allowcodebreaksfalse
+ \else
+ \errhelp = \EMsimple
+ \errmessage{Unknown @allowcodebreaks option `\txiarg'}%
+ \fi\fi
+}
+
+% @kbd is like @code, except that if the argument is just one @key command,
+% then @kbd has no effect.
+
+% @kbdinputstyle -- arg is `distinct' (@kbd uses slanted tty font always),
+% `example' (@kbd uses ttsl only inside of @example and friends),
+% or `code' (@kbd uses normal tty font always).
+\parseargdef\kbdinputstyle{%
+ \def\txiarg{#1}%
+ \ifx\txiarg\worddistinct
+ \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\ttsl}%
+ \else\ifx\txiarg\wordexample
+ \gdef\kbdexamplefont{\ttsl}\gdef\kbdfont{\tt}%
+ \else\ifx\txiarg\wordcode
+ \gdef\kbdexamplefont{\tt}\gdef\kbdfont{\tt}%
+ \else
+ \errhelp = \EMsimple
+ \errmessage{Unknown @kbdinputstyle option `\txiarg'}%
+ \fi\fi\fi
+}
+\def\worddistinct{distinct}
+\def\wordexample{example}
+\def\wordcode{code}
+
+% Default is `distinct.'
+\kbdinputstyle distinct
+
+\def\xkey{\key}
+\def\kbdfoo#1#2#3\par{\def\one{#1}\def\three{#3}\def\threex{??}%
+\ifx\one\xkey\ifx\threex\three \key{#2}%
+\else{\tclose{\kbdfont\look}}\fi
+\else{\tclose{\kbdfont\look}}\fi}
+
+% For @indicateurl, @env, @command quotes seem unnecessary, so use \code.
+\let\indicateurl=\code
+\let\env=\code
+\let\command=\code
+
+% @uref (abbreviation for `urlref') takes an optional (comma-separated)
+% second argument specifying the text to display and an optional third
+% arg as text to display instead of (rather than in addition to) the url
+% itself. First (mandatory) arg is the url. Perhaps eventually put in
+% a hypertex \special here.
+%
+\def\uref#1{\douref #1,,,\finish}
+\def\douref#1,#2,#3,#4\finish{\begingroup
+ \unsepspaces
+ \pdfurl{#1}%
+ \setbox0 = \hbox{\ignorespaces #3}%
+ \ifdim\wd0 > 0pt
+ \unhbox0 % third arg given, show only that
+ \else
+ \setbox0 = \hbox{\ignorespaces #2}%
+ \ifdim\wd0 > 0pt
+ \ifpdf
+ \unhbox0 % PDF: 2nd arg given, show only it
+ \else
+ \unhbox0\ (\code{#1})% DVI: 2nd arg given, show both it and url
+ \fi
+ \else
+ \code{#1}% only url given, so show it
+ \fi
+ \fi
+ \endlink
+\endgroup}
+
+% @url synonym for @uref, since that's how everyone uses it.
+%
+\let\url=\uref
+
+% rms does not like angle brackets --karl, 17may97.
+% So now @email is just like @uref, unless we are pdf.
+%
+%\def\email#1{\angleleft{\tt #1}\angleright}
+\ifpdf
+ \def\email#1{\doemail#1,,\finish}
+ \def\doemail#1,#2,#3\finish{\begingroup
+ \unsepspaces
+ \pdfurl{mailto:#1}%
+ \setbox0 = \hbox{\ignorespaces #2}%
+ \ifdim\wd0>0pt\unhbox0\else\code{#1}\fi
+ \endlink
+ \endgroup}
+\else
+ \let\email=\uref
+\fi
+
+% Check if we are currently using a typewriter font. Since all the
+% Computer Modern typewriter fonts have zero interword stretch (and
+% shrink), and it is reasonable to expect all typewriter fonts to have
+% this property, we can check that font parameter.
+%
+\def\ifmonospace{\ifdim\fontdimen3\font=0pt }
+
+% Typeset a dimension, e.g., `in' or `pt'. The only reason for the
+% argument is to make the input look right: @dmn{pt} instead of @dmn{}pt.
+%
+\def\dmn#1{\thinspace #1}
+
+\def\kbd#1{\def\look{#1}\expandafter\kbdfoo\look??\par}
+
+% @l was never documented to mean ``switch to the Lisp font'',
+% and it is not used as such in any manual I can find. We need it for
+% Polish suppressed-l. --karl, 22sep96.
+%\def\l#1{{\li #1}\null}
+
+% Explicit font changes: @r, @sc, undocumented @ii.
+\def\r#1{{\rm #1}} % roman font
+\def\sc#1{{\smallcaps#1}} % smallcaps font
+\def\ii#1{{\it #1}} % italic font
+
+% @acronym for "FBI", "NATO", and the like.
+% We print this one point size smaller, since it's intended for
+% all-uppercase.
+%
+\def\acronym#1{\doacronym #1,,\finish}
+\def\doacronym#1,#2,#3\finish{%
+ {\selectfonts\lsize #1}%
+ \def\temp{#2}%
+ \ifx\temp\empty \else
+ \space ({\unsepspaces \ignorespaces \temp \unskip})%
+ \fi
+}
+
+% @abbr for "Comput. J." and the like.
+% No font change, but don't do end-of-sentence spacing.
+%
+\def\abbr#1{\doabbr #1,,\finish}
+\def\doabbr#1,#2,#3\finish{%
+ {\plainfrenchspacing #1}%
+ \def\temp{#2}%
+ \ifx\temp\empty \else
+ \space ({\unsepspaces \ignorespaces \temp \unskip})%
+ \fi
+}
+
+% @pounds{} is a sterling sign, which Knuth put in the CM italic font.
+%
+\def\pounds{{\it\$}}
+
+% @euro{} comes from a separate font, depending on the current style.
+% We use the free feym* fonts from the eurosym package by Henrik
+% Theiling, which support regular, slanted, bold and bold slanted (and
+% "outlined" (blackboard board, sort of) versions, which we don't need).
+% It is available from http://www.ctan.org/tex-archive/fonts/eurosym.
+%
+% Although only regular is the truly official Euro symbol, we ignore
+% that. The Euro is designed to be slightly taller than the regular
+% font height.
+%
+% feymr - regular
+% feymo - slanted
+% feybr - bold
+% feybo - bold slanted
+%
+% There is no good (free) typewriter version, to my knowledge.
+% A feymr10 euro is ~7.3pt wide, while a normal cmtt10 char is ~5.25pt wide.
+% Hmm.
+%
+% Also doesn't work in math. Do we need to do math with euro symbols?
+% Hope not.
+%
+%
+\def\euro{{\eurofont e}}
+\def\eurofont{%
+ % We set the font at each command, rather than predefining it in
+ % \textfonts and the other font-switching commands, so that
+ % installations which never need the symbol don't have to have the
+ % font installed.
+ %
+ % There is only one designed size (nominal 10pt), so we always scale
+ % that to the current nominal size.
+ %
+ % By the way, simply using "at 1em" works for cmr10 and the like, but
+ % does not work for cmbx10 and other extended/shrunken fonts.
+ %
+ \def\eurosize{\csname\curfontsize nominalsize\endcsname}%
+ %
+ \ifx\curfontstyle\bfstylename
+ % bold:
+ \font\thiseurofont = \ifusingit{feybo10}{feybr10} at \eurosize
+ \else
+ % regular:
+ \font\thiseurofont = \ifusingit{feymo10}{feymr10} at \eurosize
+ \fi
+ \thiseurofont
+}
+
+% Hacks for glyphs from the EC fonts similar to \euro. We don't
+% use \let for the aliases, because sometimes we redefine the original
+% macro, and the alias should reflect the redefinition.
+\def\guillemetleft{{\ecfont \char"13}}
+\def\guillemotleft{\guillemetleft}
+\def\guillemetright{{\ecfont \char"14}}
+\def\guillemotright{\guillemetright}
+\def\guilsinglleft{{\ecfont \char"0E}}
+\def\guilsinglright{{\ecfont \char"0F}}
+\def\quotedblbase{{\ecfont \char"12}}
+\def\quotesinglbase{{\ecfont \char"0D}}
+%
+\def\ecfont{%
+ % We can't distinguish serif/sanserif and italic/slanted, but this
+ % is used for crude hacks anyway (like adding French and German
+ % quotes to documents typeset with CM, where we lose kerning), so
+ % hopefully nobody will notice/care.
+ \edef\ecsize{\csname\curfontsize ecsize\endcsname}%
+ \edef\nominalsize{\csname\curfontsize nominalsize\endcsname}%
+ \ifx\curfontstyle\bfstylename
+ % bold:
+ \font\thisecfont = ecb\ifusingit{i}{x}\ecsize \space at \nominalsize
+ \else
+ % regular:
+ \font\thisecfont = ec\ifusingit{ti}{rm}\ecsize \space at \nominalsize
+ \fi
+ \thisecfont
+}
+
+% @registeredsymbol - R in a circle. The font for the R should really
+% be smaller yet, but lllsize is the best we can do for now.
+% Adapted from the plain.tex definition of \copyright.
+%
+\def\registeredsymbol{%
+ $^{{\ooalign{\hfil\raise.07ex\hbox{\selectfonts\lllsize R}%
+ \hfil\crcr\Orb}}%
+ }$%
+}
+
+% @textdegree - the normal degrees sign.
+%
+\def\textdegree{$^\circ$}
+
+% Laurent Siebenmann reports \Orb undefined with:
+% Textures 1.7.7 (preloaded format=plain 93.10.14) (68K) 16 APR 2004 02:38
+% so we'll define it if necessary.
+%
+\ifx\Orb\undefined
+\def\Orb{\mathhexbox20D}
+\fi
+
+% Quotes.
+\chardef\quotedblleft="5C
+\chardef\quotedblright=`\"
+\chardef\quoteleft=`\`
+\chardef\quoteright=`\'
+
+
+\message{page headings,}
+
+\newskip\titlepagetopglue \titlepagetopglue = 1.5in
+\newskip\titlepagebottomglue \titlepagebottomglue = 2pc
+
+% First the title page. Must do @settitle before @titlepage.
+\newif\ifseenauthor
+\newif\iffinishedtitlepage
+
+% Do an implicit @contents or @shortcontents after @end titlepage if the
+% user says @setcontentsaftertitlepage or @setshortcontentsaftertitlepage.
+%
+\newif\ifsetcontentsaftertitlepage
+ \let\setcontentsaftertitlepage = \setcontentsaftertitlepagetrue
+\newif\ifsetshortcontentsaftertitlepage
+ \let\setshortcontentsaftertitlepage = \setshortcontentsaftertitlepagetrue
+
+\parseargdef\shorttitlepage{\begingroup\hbox{}\vskip 1.5in \chaprm \centerline{#1}%
+ \endgroup\page\hbox{}\page}
+
+\envdef\titlepage{%
+ % Open one extra group, as we want to close it in the middle of \Etitlepage.
+ \begingroup
+ \parindent=0pt \textfonts
+ % Leave some space at the very top of the page.
+ \vglue\titlepagetopglue
+ % No rule at page bottom unless we print one at the top with @title.
+ \finishedtitlepagetrue
+ %
+ % Most title ``pages'' are actually two pages long, with space
+ % at the top of the second. We don't want the ragged left on the second.
+ \let\oldpage = \page
+ \def\page{%
+ \iffinishedtitlepage\else
+ \finishtitlepage
+ \fi
+ \let\page = \oldpage
+ \page
+ \null
+ }%
+}
+
+\def\Etitlepage{%
+ \iffinishedtitlepage\else
+ \finishtitlepage
+ \fi
+ % It is important to do the page break before ending the group,
+ % because the headline and footline are only empty inside the group.
+ % If we use the new definition of \page, we always get a blank page
+ % after the title page, which we certainly don't want.
+ \oldpage
+ \endgroup
+ %
+ % Need this before the \...aftertitlepage checks so that if they are
+ % in effect the toc pages will come out with page numbers.
+ \HEADINGSon
+ %
+ % If they want short, they certainly want long too.
+ \ifsetshortcontentsaftertitlepage
+ \shortcontents
+ \contents
+ \global\let\shortcontents = \relax
+ \global\let\contents = \relax
+ \fi
+ %
+ \ifsetcontentsaftertitlepage
+ \contents
+ \global\let\contents = \relax
+ \global\let\shortcontents = \relax
+ \fi
+}
+
+\def\finishtitlepage{%
+ \vskip4pt \hrule height 2pt width \hsize
+ \vskip\titlepagebottomglue
+ \finishedtitlepagetrue
+}
+
+%%% Macros to be used within @titlepage:
+
+\let\subtitlerm=\tenrm
+\def\subtitlefont{\subtitlerm \normalbaselineskip = 13pt \normalbaselines}
+
+\def\authorfont{\authorrm \normalbaselineskip = 16pt \normalbaselines
+ \let\tt=\authortt}
+
+\parseargdef\title{%
+ \checkenv\titlepage
+ \leftline{\titlefonts\rm #1}
+ % print a rule at the page bottom also.
+ \finishedtitlepagefalse
+ \vskip4pt \hrule height 4pt width \hsize \vskip4pt
+}
+
+\parseargdef\subtitle{%
+ \checkenv\titlepage
+ {\subtitlefont \rightline{#1}}%
+}
+
+% @author should come last, but may come many times.
+% It can also be used inside @quotation.
+%
+\parseargdef\author{%
+ \def\temp{\quotation}%
+ \ifx\thisenv\temp
+ \def\quotationauthor{#1}% printed in \Equotation.
+ \else
+ \checkenv\titlepage
+ \ifseenauthor\else \vskip 0pt plus 1filll \seenauthortrue \fi
+ {\authorfont \leftline{#1}}%
+ \fi
+}
+
+
+%%% Set up page headings and footings.
+
+\let\thispage=\folio
+
+\newtoks\evenheadline % headline on even pages
+\newtoks\oddheadline % headline on odd pages
+\newtoks\evenfootline % footline on even pages
+\newtoks\oddfootline % footline on odd pages
+
+% Now make TeX use those variables
+\headline={{\textfonts\rm \ifodd\pageno \the\oddheadline
+ \else \the\evenheadline \fi}}
+\footline={{\textfonts\rm \ifodd\pageno \the\oddfootline
+ \else \the\evenfootline \fi}\HEADINGShook}
+\let\HEADINGShook=\relax
+
+% Commands to set those variables.
+% For example, this is what @headings on does
+% @evenheading @thistitle|@thispage|@thischapter
+% @oddheading @thischapter|@thispage|@thistitle
+% @evenfooting @thisfile||
+% @oddfooting ||@thisfile
+
+
+\def\evenheading{\parsearg\evenheadingxxx}
+\def\evenheadingxxx #1{\evenheadingyyy #1\|\|\|\|\finish}
+\def\evenheadingyyy #1\|#2\|#3\|#4\finish{%
+\global\evenheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
+
+\def\oddheading{\parsearg\oddheadingxxx}
+\def\oddheadingxxx #1{\oddheadingyyy #1\|\|\|\|\finish}
+\def\oddheadingyyy #1\|#2\|#3\|#4\finish{%
+\global\oddheadline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
+
+\parseargdef\everyheading{\oddheadingxxx{#1}\evenheadingxxx{#1}}%
+
+\def\evenfooting{\parsearg\evenfootingxxx}
+\def\evenfootingxxx #1{\evenfootingyyy #1\|\|\|\|\finish}
+\def\evenfootingyyy #1\|#2\|#3\|#4\finish{%
+\global\evenfootline={\rlap{\centerline{#2}}\line{#1\hfil#3}}}
+
+\def\oddfooting{\parsearg\oddfootingxxx}
+\def\oddfootingxxx #1{\oddfootingyyy #1\|\|\|\|\finish}
+\def\oddfootingyyy #1\|#2\|#3\|#4\finish{%
+ \global\oddfootline = {\rlap{\centerline{#2}}\line{#1\hfil#3}}%
+ %
+ % Leave some space for the footline. Hopefully ok to assume
+ % @evenfooting will not be used by itself.
+ \global\advance\pageheight by -12pt
+ \global\advance\vsize by -12pt
+}
+
+\parseargdef\everyfooting{\oddfootingxxx{#1}\evenfootingxxx{#1}}
+
+% @evenheadingmarks top \thischapter <- chapter at the top of a page
+% @evenheadingmarks bottom \thischapter <- chapter at the bottom of a page
+%
+% The same set of arguments for:
+%
+% @oddheadingmarks
+% @evenfootingmarks
+% @oddfootingmarks
+% @everyheadingmarks
+% @everyfootingmarks
+
+\def\evenheadingmarks{\headingmarks{even}{heading}}
+\def\oddheadingmarks{\headingmarks{odd}{heading}}
+\def\evenfootingmarks{\headingmarks{even}{footing}}
+\def\oddfootingmarks{\headingmarks{odd}{footing}}
+\def\everyheadingmarks#1 {\headingmarks{even}{heading}{#1}
+ \headingmarks{odd}{heading}{#1} }
+\def\everyfootingmarks#1 {\headingmarks{even}{footing}{#1}
+ \headingmarks{odd}{footing}{#1} }
+% #1 = even/odd, #2 = heading/footing, #3 = top/bottom.
+\def\headingmarks#1#2#3 {%
+ \expandafter\let\expandafter\temp \csname get#3headingmarks\endcsname
+ \global\expandafter\let\csname get#1#2marks\endcsname \temp
+}
+
+\everyheadingmarks bottom
+\everyfootingmarks bottom
+
+% @headings double turns headings on for double-sided printing.
+% @headings single turns headings on for single-sided printing.
+% @headings off turns them off.
+% @headings on same as @headings double, retained for compatibility.
+% @headings after turns on double-sided headings after this page.
+% @headings doubleafter turns on double-sided headings after this page.
+% @headings singleafter turns on single-sided headings after this page.
+% By default, they are off at the start of a document,
+% and turned `on' after @end titlepage.
+
+\def\headings #1 {\csname HEADINGS#1\endcsname}
+
+\def\HEADINGSoff{%
+\global\evenheadline={\hfil} \global\evenfootline={\hfil}
+\global\oddheadline={\hfil} \global\oddfootline={\hfil}}
+\HEADINGSoff
+% When we turn headings on, set the page number to 1.
+% For double-sided printing, put current file name in lower left corner,
+% chapter name on inside top of right hand pages, document
+% title on inside top of left hand pages, and page numbers on outside top
+% edge of all pages.
+\def\HEADINGSdouble{%
+\global\pageno=1
+\global\evenfootline={\hfil}
+\global\oddfootline={\hfil}
+\global\evenheadline={\line{\folio\hfil\thistitle}}
+\global\oddheadline={\line{\thischapter\hfil\folio}}
+\global\let\contentsalignmacro = \chapoddpage
+}
+\let\contentsalignmacro = \chappager
+
+% For single-sided printing, chapter title goes across top left of page,
+% page number on top right.
+\def\HEADINGSsingle{%
+\global\pageno=1
+\global\evenfootline={\hfil}
+\global\oddfootline={\hfil}
+\global\evenheadline={\line{\thischapter\hfil\folio}}
+\global\oddheadline={\line{\thischapter\hfil\folio}}
+\global\let\contentsalignmacro = \chappager
+}
+\def\HEADINGSon{\HEADINGSdouble}
+
+\def\HEADINGSafter{\let\HEADINGShook=\HEADINGSdoublex}
+\let\HEADINGSdoubleafter=\HEADINGSafter
+\def\HEADINGSdoublex{%
+\global\evenfootline={\hfil}
+\global\oddfootline={\hfil}
+\global\evenheadline={\line{\folio\hfil\thistitle}}
+\global\oddheadline={\line{\thischapter\hfil\folio}}
+\global\let\contentsalignmacro = \chapoddpage
+}
+
+\def\HEADINGSsingleafter{\let\HEADINGShook=\HEADINGSsinglex}
+\def\HEADINGSsinglex{%
+\global\evenfootline={\hfil}
+\global\oddfootline={\hfil}
+\global\evenheadline={\line{\thischapter\hfil\folio}}
+\global\oddheadline={\line{\thischapter\hfil\folio}}
+\global\let\contentsalignmacro = \chappager
+}
+
+% Subroutines used in generating headings
+% This produces Day Month Year style of output.
+% Only define if not already defined, in case a txi-??.tex file has set
+% up a different format (e.g., txi-cs.tex does this).
+\ifx\today\undefined
+\def\today{%
+ \number\day\space
+ \ifcase\month
+ \or\putwordMJan\or\putwordMFeb\or\putwordMMar\or\putwordMApr
+ \or\putwordMMay\or\putwordMJun\or\putwordMJul\or\putwordMAug
+ \or\putwordMSep\or\putwordMOct\or\putwordMNov\or\putwordMDec
+ \fi
+ \space\number\year}
+\fi
+
+% @settitle line... specifies the title of the document, for headings.
+% It generates no output of its own.
+\def\thistitle{\putwordNoTitle}
+\def\settitle{\parsearg{\gdef\thistitle}}
+
+
+\message{tables,}
+% Tables -- @table, @ftable, @vtable, @item(x).
+
+% default indentation of table text
+\newdimen\tableindent \tableindent=.8in
+% default indentation of @itemize and @enumerate text
+\newdimen\itemindent \itemindent=.3in
+% margin between end of table item and start of table text.
+\newdimen\itemmargin \itemmargin=.1in
+
+% used internally for \itemindent minus \itemmargin
+\newdimen\itemmax
+
+% Note @table, @ftable, and @vtable define @item, @itemx, etc., with
+% these defs.
+% They also define \itemindex
+% to index the item name in whatever manner is desired (perhaps none).
+
+\newif\ifitemxneedsnegativevskip
+
+\def\itemxpar{\par\ifitemxneedsnegativevskip\nobreak\vskip-\parskip\nobreak\fi}
+
+\def\internalBitem{\smallbreak \parsearg\itemzzz}
+\def\internalBitemx{\itemxpar \parsearg\itemzzz}
+
+\def\itemzzz #1{\begingroup %
+ \advance\hsize by -\rightskip
+ \advance\hsize by -\tableindent
+ \setbox0=\hbox{\itemindicate{#1}}%
+ \itemindex{#1}%
+ \nobreak % This prevents a break before @itemx.
+ %
+ % If the item text does not fit in the space we have, put it on a line
+ % by itself, and do not allow a page break either before or after that
+ % line. We do not start a paragraph here because then if the next
+ % command is, e.g., @kindex, the whatsit would get put into the
+ % horizontal list on a line by itself, resulting in extra blank space.
+ \ifdim \wd0>\itemmax
+ %
+ % Make this a paragraph so we get the \parskip glue and wrapping,
+ % but leave it ragged-right.
+ \begingroup
+ \advance\leftskip by-\tableindent
+ \advance\hsize by\tableindent
+ \advance\rightskip by0pt plus1fil
+ \leavevmode\unhbox0\par
+ \endgroup
+ %
+ % We're going to be starting a paragraph, but we don't want the
+ % \parskip glue -- logically it's part of the @item we just started.
+ \nobreak \vskip-\parskip
+ %
+ % Stop a page break at the \parskip glue coming up. However, if
+ % what follows is an environment such as @example, there will be no
+ % \parskip glue; then the negative vskip we just inserted would
+ % cause the example and the item to crash together. So we use this
+ % bizarre value of 10001 as a signal to \aboveenvbreak to insert
+ % \parskip glue after all. Section titles are handled this way also.
+ %
+ \penalty 10001
+ \endgroup
+ \itemxneedsnegativevskipfalse
+ \else
+ % The item text fits into the space. Start a paragraph, so that the
+ % following text (if any) will end up on the same line.
+ \noindent
+ % Do this with kerns and \unhbox so that if there is a footnote in
+ % the item text, it can migrate to the main vertical list and
+ % eventually be printed.
+ \nobreak\kern-\tableindent
+ \dimen0 = \itemmax \advance\dimen0 by \itemmargin \advance\dimen0 by -\wd0
+ \unhbox0
+ \nobreak\kern\dimen0
+ \endgroup
+ \itemxneedsnegativevskiptrue
+ \fi
+}
+
+\def\item{\errmessage{@item while not in a list environment}}
+\def\itemx{\errmessage{@itemx while not in a list environment}}
+
+% @table, @ftable, @vtable.
+\envdef\table{%
+ \let\itemindex\gobble
+ \tablecheck{table}%
+}
+\envdef\ftable{%
+ \def\itemindex ##1{\doind {fn}{\code{##1}}}%
+ \tablecheck{ftable}%
+}
+\envdef\vtable{%
+ \def\itemindex ##1{\doind {vr}{\code{##1}}}%
+ \tablecheck{vtable}%
+}
+\def\tablecheck#1{%
+ \ifnum \the\catcode`\^^M=\active
+ \endgroup
+ \errmessage{This command won't work in this context; perhaps the problem is
+ that we are \inenvironment\thisenv}%
+ \def\next{\doignore{#1}}%
+ \else
+ \let\next\tablex
+ \fi
+ \next
+}
+\def\tablex#1{%
+ \def\itemindicate{#1}%
+ \parsearg\tabley
+}
+\def\tabley#1{%
+ {%
+ \makevalueexpandable
+ \edef\temp{\noexpand\tablez #1\space\space\space}%
+ \expandafter
+ }\temp \endtablez
+}
+\def\tablez #1 #2 #3 #4\endtablez{%
+ \aboveenvbreak
+ \ifnum 0#1>0 \advance \leftskip by #1\mil \fi
+ \ifnum 0#2>0 \tableindent=#2\mil \fi
+ \ifnum 0#3>0 \advance \rightskip by #3\mil \fi
+ \itemmax=\tableindent
+ \advance \itemmax by -\itemmargin
+ \advance \leftskip by \tableindent
+ \exdentamount=\tableindent
+ \parindent = 0pt
+ \parskip = \smallskipamount
+ \ifdim \parskip=0pt \parskip=2pt \fi
+ \let\item = \internalBitem
+ \let\itemx = \internalBitemx
+}
+\def\Etable{\endgraf\afterenvbreak}
+\let\Eftable\Etable
+\let\Evtable\Etable
+\let\Eitemize\Etable
+\let\Eenumerate\Etable
+
+% This is the counter used by @enumerate, which is really @itemize
+
+\newcount \itemno
+
+\envdef\itemize{\parsearg\doitemize}
+
+\def\doitemize#1{%
+ \aboveenvbreak
+ \itemmax=\itemindent
+ \advance\itemmax by -\itemmargin
+ \advance\leftskip by \itemindent
+ \exdentamount=\itemindent
+ \parindent=0pt
+ \parskip=\smallskipamount
+ \ifdim\parskip=0pt \parskip=2pt \fi
+ \def\itemcontents{#1}%
+ % @itemize with no arg is equivalent to @itemize @bullet.
+ \ifx\itemcontents\empty\def\itemcontents{\bullet}\fi
+ \let\item=\itemizeitem
+}
+
+% Definition of @item while inside @itemize and @enumerate.
+%
+\def\itemizeitem{%
+ \advance\itemno by 1 % for enumerations
+ {\let\par=\endgraf \smallbreak}% reasonable place to break
+ {%
+ % If the document has an @itemize directly after a section title, a
+ % \nobreak will be last on the list, and \sectionheading will have
+ % done a \vskip-\parskip. In that case, we don't want to zero
+ % parskip, or the item text will crash with the heading. On the
+ % other hand, when there is normal text preceding the item (as there
+ % usually is), we do want to zero parskip, or there would be too much
+ % space. In that case, we won't have a \nobreak before. At least
+ % that's the theory.
+ \ifnum\lastpenalty<10000 \parskip=0in \fi
+ \noindent
+ \hbox to 0pt{\hss \itemcontents \kern\itemmargin}%
+ \vadjust{\penalty 1200}}% not good to break after first line of item.
+ \flushcr
+}
+
+% \splitoff TOKENS\endmark defines \first to be the first token in
+% TOKENS, and \rest to be the remainder.
+%
+\def\splitoff#1#2\endmark{\def\first{#1}\def\rest{#2}}%
+
+% Allow an optional argument of an uppercase letter, lowercase letter,
+% or number, to specify the first label in the enumerated list. No
+% argument is the same as `1'.
+%
+\envparseargdef\enumerate{\enumeratey #1 \endenumeratey}
+\def\enumeratey #1 #2\endenumeratey{%
+ % If we were given no argument, pretend we were given `1'.
+ \def\thearg{#1}%
+ \ifx\thearg\empty \def\thearg{1}\fi
+ %
+ % Detect if the argument is a single token. If so, it might be a
+ % letter. Otherwise, the only valid thing it can be is a number.
+ % (We will always have one token, because of the test we just made.
+ % This is a good thing, since \splitoff doesn't work given nothing at
+ % all -- the first parameter is undelimited.)
+ \expandafter\splitoff\thearg\endmark
+ \ifx\rest\empty
+ % Only one token in the argument. It could still be anything.
+ % A ``lowercase letter'' is one whose \lccode is nonzero.
+ % An ``uppercase letter'' is one whose \lccode is both nonzero, and
+ % not equal to itself.
+ % Otherwise, we assume it's a number.
+ %
+ % We need the \relax at the end of the \ifnum lines to stop TeX from
+ % continuing to look for a <number>.
+ %
+ \ifnum\lccode\expandafter`\thearg=0\relax
+ \numericenumerate % a number (we hope)
+ \else
+ % It's a letter.
+ \ifnum\lccode\expandafter`\thearg=\expandafter`\thearg\relax
+ \lowercaseenumerate % lowercase letter
+ \else
+ \uppercaseenumerate % uppercase letter
+ \fi
+ \fi
+ \else
+ % Multiple tokens in the argument. We hope it's a number.
+ \numericenumerate
+ \fi
+}
+
+% An @enumerate whose labels are integers. The starting integer is
+% given in \thearg.
+%
+\def\numericenumerate{%
+ \itemno = \thearg
+ \startenumeration{\the\itemno}%
+}
+
+% The starting (lowercase) letter is in \thearg.
+\def\lowercaseenumerate{%
+ \itemno = \expandafter`\thearg
+ \startenumeration{%
+ % Be sure we're not beyond the end of the alphabet.
+ \ifnum\itemno=0
+ \errmessage{No more lowercase letters in @enumerate; get a bigger
+ alphabet}%
+ \fi
+ \char\lccode\itemno
+ }%
+}
+
+% The starting (uppercase) letter is in \thearg.
+\def\uppercaseenumerate{%
+ \itemno = \expandafter`\thearg
+ \startenumeration{%
+ % Be sure we're not beyond the end of the alphabet.
+ \ifnum\itemno=0
+ \errmessage{No more uppercase letters in @enumerate; get a bigger
+ alphabet}
+ \fi
+ \char\uccode\itemno
+ }%
+}
+
+% Call \doitemize, adding a period to the first argument and supplying the
+% common last two arguments. Also subtract one from the initial value in
+% \itemno, since @item increments \itemno.
+%
+\def\startenumeration#1{%
+ \advance\itemno by -1
+ \doitemize{#1.}\flushcr
+}
+
+% @alphaenumerate and @capsenumerate are abbreviations for giving an arg
+% to @enumerate.
+%
+\def\alphaenumerate{\enumerate{a}}
+\def\capsenumerate{\enumerate{A}}
+\def\Ealphaenumerate{\Eenumerate}
+\def\Ecapsenumerate{\Eenumerate}
+
+
+% @multitable macros
+% Amy Hendrickson, 8/18/94, 3/6/96
+%
+% @multitable ... @end multitable will make as many columns as desired.
+% Contents of each column will wrap at width given in preamble. Width
+% can be specified either with sample text given in a template line,
+% or in percent of \hsize, the current width of text on page.
+
+% Table can continue over pages but will only break between lines.
+
+% To make preamble:
+%
+% Either define widths of columns in terms of percent of \hsize:
+% @multitable @columnfractions .25 .3 .45
+% @item ...
+%
+% Numbers following @columnfractions are the percent of the total
+% current hsize to be used for each column. You may use as many
+% columns as desired.
+
+
+% Or use a template:
+% @multitable {Column 1 template} {Column 2 template} {Column 3 template}
+% @item ...
+% using the widest term desired in each column.
+
+% Each new table line starts with @item, each subsequent new column
+% starts with @tab. Empty columns may be produced by supplying @tab's
+% with nothing between them for as many times as empty columns are needed,
+% ie, @tab@tab@tab will produce two empty columns.
+
+% @item, @tab do not need to be on their own lines, but it will not hurt
+% if they are.
+
+% Sample multitable:
+
+% @multitable {Column 1 template} {Column 2 template} {Column 3 template}
+% @item first col stuff @tab second col stuff @tab third col
+% @item
+% first col stuff
+% @tab
+% second col stuff
+% @tab
+% third col
+% @item first col stuff @tab second col stuff
+% @tab Many paragraphs of text may be used in any column.
+%
+% They will wrap at the width determined by the template.
+% @item@tab@tab This will be in third column.
+% @end multitable
+
+% Default dimensions may be reset by user.
+% @multitableparskip is vertical space between paragraphs in table.
+% @multitableparindent is paragraph indent in table.
+% @multitablecolmargin is horizontal space to be left between columns.
+% @multitablelinespace is space to leave between table items, baseline
+% to baseline.
+% 0pt means it depends on current normal line spacing.
+%
+\newskip\multitableparskip
+\newskip\multitableparindent
+\newdimen\multitablecolspace
+\newskip\multitablelinespace
+\multitableparskip=0pt
+\multitableparindent=6pt
+\multitablecolspace=12pt
+\multitablelinespace=0pt
+
+% Macros used to set up halign preamble:
+%
+\let\endsetuptable\relax
+\def\xendsetuptable{\endsetuptable}
+\let\columnfractions\relax
+\def\xcolumnfractions{\columnfractions}
+\newif\ifsetpercent
+
+% #1 is the @columnfraction, usually a decimal number like .5, but might
+% be just 1. We just use it, whatever it is.
+%
+\def\pickupwholefraction#1 {%
+ \global\advance\colcount by 1
+ \expandafter\xdef\csname col\the\colcount\endcsname{#1\hsize}%
+ \setuptable
+}
+
+\newcount\colcount
+\def\setuptable#1{%
+ \def\firstarg{#1}%
+ \ifx\firstarg\xendsetuptable
+ \let\go = \relax
+ \else
+ \ifx\firstarg\xcolumnfractions
+ \global\setpercenttrue
+ \else
+ \ifsetpercent
+ \let\go\pickupwholefraction
+ \else
+ \global\advance\colcount by 1
+ \setbox0=\hbox{#1\unskip\space}% Add a normal word space as a
+ % separator; typically that is always in the input, anyway.
+ \expandafter\xdef\csname col\the\colcount\endcsname{\the\wd0}%
+ \fi
+ \fi
+ \ifx\go\pickupwholefraction
+ % Put the argument back for the \pickupwholefraction call, so
+ % we'll always have a period there to be parsed.
+ \def\go{\pickupwholefraction#1}%
+ \else
+ \let\go = \setuptable
+ \fi%
+ \fi
+ \go
+}
+
+% multitable-only commands.
+%
+% @headitem starts a heading row, which we typeset in bold.
+% Assignments have to be global since we are inside the implicit group
+% of an alignment entry. Note that \everycr resets \everytab.
+\def\headitem{\checkenv\multitable \crcr \global\everytab={\bf}\the\everytab}%
+%
+% A \tab used to include \hskip1sp. But then the space in a template
+% line is not enough. That is bad. So let's go back to just `&' until
+% we encounter the problem it was intended to solve again.
+% --karl, nathan@acm.org, 20apr99.
+\def\tab{\checkenv\multitable &\the\everytab}%
+
+% @multitable ... @end multitable definitions:
+%
+\newtoks\everytab % insert after every tab.
+%
+\envdef\multitable{%
+ \vskip\parskip
+ \startsavinginserts
+ %
+ % @item within a multitable starts a normal row.
+ % We use \def instead of \let so that if one of the multitable entries
+ % contains an @itemize, we don't choke on the \item (seen as \crcr aka
+ % \endtemplate) expanding \doitemize.
+ \def\item{\crcr}%
+ %
+ \tolerance=9500
+ \hbadness=9500
+ \setmultitablespacing
+ \parskip=\multitableparskip
+ \parindent=\multitableparindent
+ \overfullrule=0pt
+ \global\colcount=0
+ %
+ \everycr = {%
+ \noalign{%
+ \global\everytab={}%
+ \global\colcount=0 % Reset the column counter.
+ % Check for saved footnotes, etc.
+ \checkinserts
+ % Keeps underfull box messages off when table breaks over pages.
+ %\filbreak
+ % Maybe so, but it also creates really weird page breaks when the
+ % table breaks over pages. Wouldn't \vfil be better? Wait until the
+ % problem manifests itself, so it can be fixed for real --karl.
+ }%
+ }%
+ %
+ \parsearg\domultitable
+}
+\def\domultitable#1{%
+ % To parse everything between @multitable and @item:
+ \setuptable#1 \endsetuptable
+ %
+ % This preamble sets up a generic column definition, which will
+ % be used as many times as user calls for columns.
+ % \vtop will set a single line and will also let text wrap and
+ % continue for many paragraphs if desired.
+ \halign\bgroup &%
+ \global\advance\colcount by 1
+ \multistrut
+ \vtop{%
+ % Use the current \colcount to find the correct column width:
+ \hsize=\expandafter\csname col\the\colcount\endcsname
+ %
+ % In order to keep entries from bumping into each other
+ % we will add a \leftskip of \multitablecolspace to all columns after
+ % the first one.
+ %
+ % If a template has been used, we will add \multitablecolspace
+ % to the width of each template entry.
+ %
+ % If the user has set preamble in terms of percent of \hsize we will
+ % use that dimension as the width of the column, and the \leftskip
+ % will keep entries from bumping into each other. Table will start at
+ % left margin and final column will justify at right margin.
+ %
+ % Make sure we don't inherit \rightskip from the outer environment.
+ \rightskip=0pt
+ \ifnum\colcount=1
+ % The first column will be indented with the surrounding text.
+ \advance\hsize by\leftskip
+ \else
+ \ifsetpercent \else
+ % If user has not set preamble in terms of percent of \hsize
+ % we will advance \hsize by \multitablecolspace.
+ \advance\hsize by \multitablecolspace
+ \fi
+ % In either case we will make \leftskip=\multitablecolspace:
+ \leftskip=\multitablecolspace
+ \fi
+ % Ignoring space at the beginning and end avoids an occasional spurious
+ % blank line, when TeX decides to break the line at the space before the
+ % box from the multistrut, so the strut ends up on a line by itself.
+ % For example:
+ % @multitable @columnfractions .11 .89
+ % @item @code{#}
+ % @tab Legal holiday which is valid in major parts of the whole country.
+ % Is automatically provided with highlighting sequences respectively
+ % marking characters.
+ \noindent\ignorespaces##\unskip\multistrut
+ }\cr
+}
+\def\Emultitable{%
+ \crcr
+ \egroup % end the \halign
+ \global\setpercentfalse
+}
+
+\def\setmultitablespacing{%
+ \def\multistrut{\strut}% just use the standard line spacing
+ %
+ % Compute \multitablelinespace (if not defined by user) for use in
+ % \multitableparskip calculation. We used define \multistrut based on
+ % this, but (ironically) that caused the spacing to be off.
+ % See bug-texinfo report from Werner Lemberg, 31 Oct 2004 12:52:20 +0100.
+\ifdim\multitablelinespace=0pt
+\setbox0=\vbox{X}\global\multitablelinespace=\the\baselineskip
+\global\advance\multitablelinespace by-\ht0
+\fi
+%% Test to see if parskip is larger than space between lines of
+%% table. If not, do nothing.
+%% If so, set to same dimension as multitablelinespace.
+\ifdim\multitableparskip>\multitablelinespace
+\global\multitableparskip=\multitablelinespace
+\global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
+ %% than skip between lines in the table.
+\fi%
+\ifdim\multitableparskip=0pt
+\global\multitableparskip=\multitablelinespace
+\global\advance\multitableparskip-7pt %% to keep parskip somewhat smaller
+ %% than skip between lines in the table.
+\fi}
+
+
+\message{conditionals,}
+
+% @iftex, @ifnotdocbook, @ifnothtml, @ifnotinfo, @ifnotplaintext,
+% @ifnotxml always succeed. They currently do nothing; we don't
+% attempt to check whether the conditionals are properly nested. But we
+% have to remember that they are conditionals, so that @end doesn't
+% attempt to close an environment group.
+%
+\def\makecond#1{%
+ \expandafter\let\csname #1\endcsname = \relax
+ \expandafter\let\csname iscond.#1\endcsname = 1
+}
+\makecond{iftex}
+\makecond{ifnotdocbook}
+\makecond{ifnothtml}
+\makecond{ifnotinfo}
+\makecond{ifnotplaintext}
+\makecond{ifnotxml}
+
+% Ignore @ignore, @ifhtml, @ifinfo, and the like.
+%
+\def\direntry{\doignore{direntry}}
+\def\documentdescription{\doignore{documentdescription}}
+\def\docbook{\doignore{docbook}}
+\def\html{\doignore{html}}
+\def\ifdocbook{\doignore{ifdocbook}}
+\def\ifhtml{\doignore{ifhtml}}
+\def\ifinfo{\doignore{ifinfo}}
+\def\ifnottex{\doignore{ifnottex}}
+\def\ifplaintext{\doignore{ifplaintext}}
+\def\ifxml{\doignore{ifxml}}
+\def\ignore{\doignore{ignore}}
+\def\menu{\doignore{menu}}
+\def\xml{\doignore{xml}}
+
+% Ignore text until a line `@end #1', keeping track of nested conditionals.
+%
+% A count to remember the depth of nesting.
+\newcount\doignorecount
+
+\def\doignore#1{\begingroup
+ % Scan in ``verbatim'' mode:
+ \obeylines
+ \catcode`\@ = \other
+ \catcode`\{ = \other
+ \catcode`\} = \other
+ %
+ % Make sure that spaces turn into tokens that match what \doignoretext wants.
+ \spaceisspace
+ %
+ % Count number of #1's that we've seen.
+ \doignorecount = 0
+ %
+ % Swallow text until we reach the matching `@end #1'.
+ \dodoignore{#1}%
+}
+
+{ \catcode`_=11 % We want to use \_STOP_ which cannot appear in texinfo source.
+ \obeylines %
+ %
+ \gdef\dodoignore#1{%
+ % #1 contains the command name as a string, e.g., `ifinfo'.
+ %
+ % Define a command to find the next `@end #1'.
+ \long\def\doignoretext##1^^M@end #1{%
+ \doignoretextyyy##1^^M@#1\_STOP_}%
+ %
+ % And this command to find another #1 command, at the beginning of a
+ % line. (Otherwise, we would consider a line `@c @ifset', for
+ % example, to count as an @ifset for nesting.)
+ \long\def\doignoretextyyy##1^^M@#1##2\_STOP_{\doignoreyyy{##2}\_STOP_}%
+ %
+ % And now expand that command.
+ \doignoretext ^^M%
+ }%
+}
+
+\def\doignoreyyy#1{%
+ \def\temp{#1}%
+ \ifx\temp\empty % Nothing found.
+ \let\next\doignoretextzzz
+ \else % Found a nested condition, ...
+ \advance\doignorecount by 1
+ \let\next\doignoretextyyy % ..., look for another.
+ % If we're here, #1 ends with ^^M\ifinfo (for example).
+ \fi
+ \next #1% the token \_STOP_ is present just after this macro.
+}
+
+% We have to swallow the remaining "\_STOP_".
+%
+\def\doignoretextzzz#1{%
+ \ifnum\doignorecount = 0 % We have just found the outermost @end.
+ \let\next\enddoignore
+ \else % Still inside a nested condition.
+ \advance\doignorecount by -1
+ \let\next\doignoretext % Look for the next @end.
+ \fi
+ \next
+}
+
+% Finish off ignored text.
+{ \obeylines%
+ % Ignore anything after the last `@end #1'; this matters in verbatim
+ % environments, where otherwise the newline after an ignored conditional
+ % would result in a blank line in the output.
+ \gdef\enddoignore#1^^M{\endgroup\ignorespaces}%
+}
+
+
+% @set VAR sets the variable VAR to an empty value.
+% @set VAR REST-OF-LINE sets VAR to the value REST-OF-LINE.
+%
+% Since we want to separate VAR from REST-OF-LINE (which might be
+% empty), we can't just use \parsearg; we have to insert a space of our
+% own to delimit the rest of the line, and then take it out again if we
+% didn't need it.
+% We rely on the fact that \parsearg sets \catcode`\ =10.
+%
+\parseargdef\set{\setyyy#1 \endsetyyy}
+\def\setyyy#1 #2\endsetyyy{%
+ {%
+ \makevalueexpandable
+ \def\temp{#2}%
+ \edef\next{\gdef\makecsname{SET#1}}%
+ \ifx\temp\empty
+ \next{}%
+ \else
+ \setzzz#2\endsetzzz
+ \fi
+ }%
+}
+% Remove the trailing space \setxxx inserted.
+\def\setzzz#1 \endsetzzz{\next{#1}}
+
+% @clear VAR clears (i.e., unsets) the variable VAR.
+%
+\parseargdef\clear{%
+ {%
+ \makevalueexpandable
+ \global\expandafter\let\csname SET#1\endcsname=\relax
+ }%
+}
+
+% @value{foo} gets the text saved in variable foo.
+\def\value{\begingroup\makevalueexpandable\valuexxx}
+\def\valuexxx#1{\expandablevalue{#1}\endgroup}
+{
+ \catcode`\- = \active \catcode`\_ = \active
+ %
+ \gdef\makevalueexpandable{%
+ \let\value = \expandablevalue
+ % We don't want these characters active, ...
+ \catcode`\-=\other \catcode`\_=\other
+ % ..., but we might end up with active ones in the argument if
+ % we're called from @code, as @code{@value{foo-bar_}}, though.
+ % So \let them to their normal equivalents.
+ \let-\realdash \let_\normalunderscore
+ }
+}
+
+% We have this subroutine so that we can handle at least some @value's
+% properly in indexes (we call \makevalueexpandable in \indexdummies).
+% The command has to be fully expandable (if the variable is set), since
+% the result winds up in the index file. This means that if the
+% variable's value contains other Texinfo commands, it's almost certain
+% it will fail (although perhaps we could fix that with sufficient work
+% to do a one-level expansion on the result, instead of complete).
+%
+\def\expandablevalue#1{%
+ \expandafter\ifx\csname SET#1\endcsname\relax
+ {[No value for ``#1'']}%
+ \message{Variable `#1', used in @value, is not set.}%
+ \else
+ \csname SET#1\endcsname
+ \fi
+}
+
+% @ifset VAR ... @end ifset reads the `...' iff VAR has been defined
+% with @set.
+%
+% To get special treatment of `@end ifset,' call \makeond and the redefine.
+%
+\makecond{ifset}
+\def\ifset{\parsearg{\doifset{\let\next=\ifsetfail}}}
+\def\doifset#1#2{%
+ {%
+ \makevalueexpandable
+ \let\next=\empty
+ \expandafter\ifx\csname SET#2\endcsname\relax
+ #1% If not set, redefine \next.
+ \fi
+ \expandafter
+ }\next
+}
+\def\ifsetfail{\doignore{ifset}}
+
+% @ifclear VAR ... @end ifclear reads the `...' iff VAR has never been
+% defined with @set, or has been undefined with @clear.
+%
+% The `\else' inside the `\doifset' parameter is a trick to reuse the
+% above code: if the variable is not set, do nothing, if it is set,
+% then redefine \next to \ifclearfail.
+%
+\makecond{ifclear}
+\def\ifclear{\parsearg{\doifset{\else \let\next=\ifclearfail}}}
+\def\ifclearfail{\doignore{ifclear}}
+
+% @dircategory CATEGORY -- specify a category of the dir file
+% which this file should belong to. Ignore this in TeX.
+\let\dircategory=\comment
+
+% @defininfoenclose.
+\let\definfoenclose=\comment
+
+
+\message{indexing,}
+% Index generation facilities
+
+% Define \newwrite to be identical to plain tex's \newwrite
+% except not \outer, so it can be used within macros and \if's.
+\edef\newwrite{\makecsname{ptexnewwrite}}
+
+% \newindex {foo} defines an index named foo.
+% It automatically defines \fooindex such that
+% \fooindex ...rest of line... puts an entry in the index foo.
+% It also defines \fooindfile to be the number of the output channel for
+% the file that accumulates this index. The file's extension is foo.
+% The name of an index should be no more than 2 characters long
+% for the sake of vms.
+%
+\def\newindex#1{%
+ \iflinks
+ \expandafter\newwrite \csname#1indfile\endcsname
+ \openout \csname#1indfile\endcsname \jobname.#1 % Open the file
+ \fi
+ \expandafter\xdef\csname#1index\endcsname{% % Define @#1index
+ \noexpand\doindex{#1}}
+}
+
+% @defindex foo == \newindex{foo}
+%
+\def\defindex{\parsearg\newindex}
+
+% Define @defcodeindex, like @defindex except put all entries in @code.
+%
+\def\defcodeindex{\parsearg\newcodeindex}
+%
+\def\newcodeindex#1{%
+ \iflinks
+ \expandafter\newwrite \csname#1indfile\endcsname
+ \openout \csname#1indfile\endcsname \jobname.#1
+ \fi
+ \expandafter\xdef\csname#1index\endcsname{%
+ \noexpand\docodeindex{#1}}%
+}
+
+
+% @synindex foo bar makes index foo feed into index bar.
+% Do this instead of @defindex foo if you don't want it as a separate index.
+%
+% @syncodeindex foo bar similar, but put all entries made for index foo
+% inside @code.
+%
+\def\synindex#1 #2 {\dosynindex\doindex{#1}{#2}}
+\def\syncodeindex#1 #2 {\dosynindex\docodeindex{#1}{#2}}
+
+% #1 is \doindex or \docodeindex, #2 the index getting redefined (foo),
+% #3 the target index (bar).
+\def\dosynindex#1#2#3{%
+ % Only do \closeout if we haven't already done it, else we'll end up
+ % closing the target index.
+ \expandafter \ifx\csname donesynindex#2\endcsname \undefined
+ % The \closeout helps reduce unnecessary open files; the limit on the
+ % Acorn RISC OS is a mere 16 files.
+ \expandafter\closeout\csname#2indfile\endcsname
+ \expandafter\let\csname\donesynindex#2\endcsname = 1
+ \fi
+ % redefine \fooindfile:
+ \expandafter\let\expandafter\temp\expandafter=\csname#3indfile\endcsname
+ \expandafter\let\csname#2indfile\endcsname=\temp
+ % redefine \fooindex:
+ \expandafter\xdef\csname#2index\endcsname{\noexpand#1{#3}}%
+}
+
+% Define \doindex, the driver for all \fooindex macros.
+% Argument #1 is generated by the calling \fooindex macro,
+% and it is "foo", the name of the index.
+
+% \doindex just uses \parsearg; it calls \doind for the actual work.
+% This is because \doind is more useful to call from other macros.
+
+% There is also \dosubind {index}{topic}{subtopic}
+% which makes an entry in a two-level index such as the operation index.
+
+\def\doindex#1{\edef\indexname{#1}\parsearg\singleindexer}
+\def\singleindexer #1{\doind{\indexname}{#1}}
+
+% like the previous two, but they put @code around the argument.
+\def\docodeindex#1{\edef\indexname{#1}\parsearg\singlecodeindexer}
+\def\singlecodeindexer #1{\doind{\indexname}{\code{#1}}}
+
+% Take care of Texinfo commands that can appear in an index entry.
+% Since there are some commands we want to expand, and others we don't,
+% we have to laboriously prevent expansion for those that we don't.
+%
+\def\indexdummies{%
+ \escapechar = `\\ % use backslash in output files.
+ \def\@{@}% change to @@ when we switch to @ as escape char in index files.
+ \def\ {\realbackslash\space }%
+ %
+ % Need these in case \tex is in effect and \{ is a \delimiter again.
+ % But can't use \lbracecmd and \rbracecmd because texindex assumes
+ % braces and backslashes are used only as delimiters.
+ \let\{ = \mylbrace
+ \let\} = \myrbrace
+ %
+ % I don't entirely understand this, but when an index entry is
+ % generated from a macro call, the \endinput which \scanmacro inserts
+ % causes processing to be prematurely terminated. This is,
+ % apparently, because \indexsorttmp is fully expanded, and \endinput
+ % is an expandable command. The redefinition below makes \endinput
+ % disappear altogether for that purpose -- although logging shows that
+ % processing continues to some further point. On the other hand, it
+ % seems \endinput does not hurt in the printed index arg, since that
+ % is still getting written without apparent harm.
+ %
+ % Sample source (mac-idx3.tex, reported by Graham Percival to
+ % help-texinfo, 22may06):
+ % @macro funindex {WORD}
+ % @findex xyz
+ % @end macro
+ % ...
+ % @funindex commtest
+ %
+ % The above is not enough to reproduce the bug, but it gives the flavor.
+ %
+ % Sample whatsit resulting:
+ % .@write3{\entry{xyz}{@folio }{@code {xyz@endinput }}}
+ %
+ % So:
+ \let\endinput = \empty
+ %
+ % Do the redefinitions.
+ \commondummies
+}
+
+% For the aux and toc files, @ is the escape character. So we want to
+% redefine everything using @ as the escape character (instead of
+% \realbackslash, still used for index files). When everything uses @,
+% this will be simpler.
+%
+\def\atdummies{%
+ \def\@{@@}%
+ \def\ {@ }%
+ \let\{ = \lbraceatcmd
+ \let\} = \rbraceatcmd
+ %
+ % Do the redefinitions.
+ \commondummies
+ \otherbackslash
+}
+
+% Called from \indexdummies and \atdummies.
+%
+\def\commondummies{%
+ %
+ % \definedummyword defines \#1 as \string\#1\space, thus effectively
+ % preventing its expansion. This is used only for control% words,
+ % not control letters, because the \space would be incorrect for
+ % control characters, but is needed to separate the control word
+ % from whatever follows.
+ %
+ % For control letters, we have \definedummyletter, which omits the
+ % space.
+ %
+ % These can be used both for control words that take an argument and
+ % those that do not. If it is followed by {arg} in the input, then
+ % that will dutifully get written to the index (or wherever).
+ %
+ \def\definedummyword ##1{\def##1{\string##1\space}}%
+ \def\definedummyletter##1{\def##1{\string##1}}%
+ \let\definedummyaccent\definedummyletter
+ %
+ \commondummiesnofonts
+ %
+ \definedummyletter\_%
+ %
+ % Non-English letters.
+ \definedummyword\AA
+ \definedummyword\AE
+ \definedummyword\L
+ \definedummyword\OE
+ \definedummyword\O
+ \definedummyword\aa
+ \definedummyword\ae
+ \definedummyword\l
+ \definedummyword\oe
+ \definedummyword\o
+ \definedummyword\ss
+ \definedummyword\exclamdown
+ \definedummyword\questiondown
+ \definedummyword\ordf
+ \definedummyword\ordm
+ %
+ % Although these internal commands shouldn't show up, sometimes they do.
+ \definedummyword\bf
+ \definedummyword\gtr
+ \definedummyword\hat
+ \definedummyword\less
+ \definedummyword\sf
+ \definedummyword\sl
+ \definedummyword\tclose
+ \definedummyword\tt
+ %
+ \definedummyword\LaTeX
+ \definedummyword\TeX
+ %
+ % Assorted special characters.
+ \definedummyword\bullet
+ \definedummyword\comma
+ \definedummyword\copyright
+ \definedummyword\registeredsymbol
+ \definedummyword\dots
+ \definedummyword\enddots
+ \definedummyword\equiv
+ \definedummyword\error
+ \definedummyword\euro
+ \definedummyword\guillemetleft
+ \definedummyword\guillemetright
+ \definedummyword\guilsinglleft
+ \definedummyword\guilsinglright
+ \definedummyword\expansion
+ \definedummyword\minus
+ \definedummyword\pounds
+ \definedummyword\point
+ \definedummyword\print
+ \definedummyword\quotedblbase
+ \definedummyword\quotedblleft
+ \definedummyword\quotedblright
+ \definedummyword\quoteleft
+ \definedummyword\quoteright
+ \definedummyword\quotesinglbase
+ \definedummyword\result
+ \definedummyword\textdegree
+ %
+ % We want to disable all macros so that they are not expanded by \write.
+ \macrolist
+ %
+ \normalturnoffactive
+ %
+ % Handle some cases of @value -- where it does not contain any
+ % (non-fully-expandable) commands.
+ \makevalueexpandable
+}
+
+% \commondummiesnofonts: common to \commondummies and \indexnofonts.
+%
+\def\commondummiesnofonts{%
+ % Control letters and accents.
+ \definedummyletter\!%
+ \definedummyaccent\"%
+ \definedummyaccent\'%
+ \definedummyletter\*%
+ \definedummyaccent\,%
+ \definedummyletter\.%
+ \definedummyletter\/%
+ \definedummyletter\:%
+ \definedummyaccent\=%
+ \definedummyletter\?%
+ \definedummyaccent\^%
+ \definedummyaccent\`%
+ \definedummyaccent\~%
+ \definedummyword\u
+ \definedummyword\v
+ \definedummyword\H
+ \definedummyword\dotaccent
+ \definedummyword\ringaccent
+ \definedummyword\tieaccent
+ \definedummyword\ubaraccent
+ \definedummyword\udotaccent
+ \definedummyword\dotless
+ %
+ % Texinfo font commands.
+ \definedummyword\b
+ \definedummyword\i
+ \definedummyword\r
+ \definedummyword\sc
+ \definedummyword\t
+ %
+ % Commands that take arguments.
+ \definedummyword\acronym
+ \definedummyword\cite
+ \definedummyword\code
+ \definedummyword\command
+ \definedummyword\dfn
+ \definedummyword\emph
+ \definedummyword\env
+ \definedummyword\file
+ \definedummyword\kbd
+ \definedummyword\key
+ \definedummyword\math
+ \definedummyword\option
+ \definedummyword\pxref
+ \definedummyword\ref
+ \definedummyword\samp
+ \definedummyword\strong
+ \definedummyword\tie
+ \definedummyword\uref
+ \definedummyword\url
+ \definedummyword\var
+ \definedummyword\verb
+ \definedummyword\w
+ \definedummyword\xref
+}
+
+% \indexnofonts is used when outputting the strings to sort the index
+% by, and when constructing control sequence names. It eliminates all
+% control sequences and just writes whatever the best ASCII sort string
+% would be for a given command (usually its argument).
+%
+\def\indexnofonts{%
+ % Accent commands should become @asis.
+ \def\definedummyaccent##1{\let##1\asis}%
+ % We can just ignore other control letters.
+ \def\definedummyletter##1{\let##1\empty}%
+ % Hopefully, all control words can become @asis.
+ \let\definedummyword\definedummyaccent
+ %
+ \commondummiesnofonts
+ %
+ % Don't no-op \tt, since it isn't a user-level command
+ % and is used in the definitions of the active chars like <, >, |, etc.
+ % Likewise with the other plain tex font commands.
+ %\let\tt=\asis
+ %
+ \def\ { }%
+ \def\@{@}%
+ % how to handle braces?
+ \def\_{\normalunderscore}%
+ %
+ % Non-English letters.
+ \def\AA{AA}%
+ \def\AE{AE}%
+ \def\L{L}%
+ \def\OE{OE}%
+ \def\O{O}%
+ \def\aa{aa}%
+ \def\ae{ae}%
+ \def\l{l}%
+ \def\oe{oe}%
+ \def\o{o}%
+ \def\ss{ss}%
+ \def\exclamdown{!}%
+ \def\questiondown{?}%
+ \def\ordf{a}%
+ \def\ordm{o}%
+ %
+ \def\LaTeX{LaTeX}%
+ \def\TeX{TeX}%
+ %
+ % Assorted special characters.
+ % (The following {} will end up in the sort string, but that's ok.)
+ \def\bullet{bullet}%
+ \def\comma{,}%
+ \def\copyright{copyright}%
+ \def\registeredsymbol{R}%
+ \def\dots{...}%
+ \def\enddots{...}%
+ \def\equiv{==}%
+ \def\error{error}%
+ \def\euro{euro}%
+ \def\guillemetleft{<<}%
+ \def\guillemetright{>>}%
+ \def\guilsinglleft{<}%
+ \def\guilsinglright{>}%
+ \def\expansion{==>}%
+ \def\minus{-}%
+ \def\pounds{pounds}%
+ \def\point{.}%
+ \def\print{-|}%
+ \def\quotedblbase{"}%
+ \def\quotedblleft{"}%
+ \def\quotedblright{"}%
+ \def\quoteleft{`}%
+ \def\quoteright{'}%
+ \def\quotesinglbase{,}%
+ \def\result{=>}%
+ \def\textdegree{degrees}%
+ %
+ % We need to get rid of all macros, leaving only the arguments (if present).
+ % Of course this is not nearly correct, but it is the best we can do for now.
+ % makeinfo does not expand macros in the argument to @deffn, which ends up
+ % writing an index entry, and texindex isn't prepared for an index sort entry
+ % that starts with \.
+ %
+ % Since macro invocations are followed by braces, we can just redefine them
+ % to take a single TeX argument. The case of a macro invocation that
+ % goes to end-of-line is not handled.
+ %
+ \macrolist
+}
+
+\let\indexbackslash=0 %overridden during \printindex.
+\let\SETmarginindex=\relax % put index entries in margin (undocumented)?
+
+% Most index entries go through here, but \dosubind is the general case.
+% #1 is the index name, #2 is the entry text.
+\def\doind#1#2{\dosubind{#1}{#2}{}}
+
+% Workhorse for all \fooindexes.
+% #1 is name of index, #2 is stuff to put there, #3 is subentry --
+% empty if called from \doind, as we usually are (the main exception
+% is with most defuns, which call us directly).
+%
+\def\dosubind#1#2#3{%
+ \iflinks
+ {%
+ % Store the main index entry text (including the third arg).
+ \toks0 = {#2}%
+ % If third arg is present, precede it with a space.
+ \def\thirdarg{#3}%
+ \ifx\thirdarg\empty \else
+ \toks0 = \expandafter{\the\toks0 \space #3}%
+ \fi
+ %
+ \edef\writeto{\csname#1indfile\endcsname}%
+ %
+ \safewhatsit\dosubindwrite
+ }%
+ \fi
+}
+
+% Write the entry in \toks0 to the index file:
+%
+\def\dosubindwrite{%
+ % Put the index entry in the margin if desired.
+ \ifx\SETmarginindex\relax\else
+ \insert\margin{\hbox{\vrule height8pt depth3pt width0pt \the\toks0}}%
+ \fi
+ %
+ % Remember, we are within a group.
+ \indexdummies % Must do this here, since \bf, etc expand at this stage
+ \def\backslashcurfont{\indexbackslash}% \indexbackslash isn't defined now
+ % so it will be output as is; and it will print as backslash.
+ %
+ % Process the index entry with all font commands turned off, to
+ % get the string to sort by.
+ {\indexnofonts
+ \edef\temp{\the\toks0}% need full expansion
+ \xdef\indexsorttmp{\temp}%
+ }%
+ %
+ % Set up the complete index entry, with both the sort key and
+ % the original text, including any font commands. We write
+ % three arguments to \entry to the .?? file (four in the
+ % subentry case), texindex reduces to two when writing the .??s
+ % sorted result.
+ \edef\temp{%
+ \write\writeto{%
+ \string\entry{\indexsorttmp}{\noexpand\folio}{\the\toks0}}%
+ }%
+ \temp
+}
+
+% Take care of unwanted page breaks/skips around a whatsit:
+%
+% If a skip is the last thing on the list now, preserve it
+% by backing up by \lastskip, doing the \write, then inserting
+% the skip again. Otherwise, the whatsit generated by the
+% \write or \pdfdest will make \lastskip zero. The result is that
+% sequences like this:
+% @end defun
+% @tindex whatever
+% @defun ...
+% will have extra space inserted, because the \medbreak in the
+% start of the @defun won't see the skip inserted by the @end of
+% the previous defun.
+%
+% But don't do any of this if we're not in vertical mode. We
+% don't want to do a \vskip and prematurely end a paragraph.
+%
+% Avoid page breaks due to these extra skips, too.
+%
+% But wait, there is a catch there:
+% We'll have to check whether \lastskip is zero skip. \ifdim is not
+% sufficient for this purpose, as it ignores stretch and shrink parts
+% of the skip. The only way seems to be to check the textual
+% representation of the skip.
+%
+% The following is almost like \def\zeroskipmacro{0.0pt} except that
+% the ``p'' and ``t'' characters have catcode \other, not 11 (letter).
+%
+\edef\zeroskipmacro{\expandafter\the\csname z@skip\endcsname}
+%
+\newskip\whatsitskip
+\newcount\whatsitpenalty
+%
+% ..., ready, GO:
+%
+\def\safewhatsit#1{%
+\ifhmode
+ #1%
+\else
+ % \lastskip and \lastpenalty cannot both be nonzero simultaneously.
+ \whatsitskip = \lastskip
+ \edef\lastskipmacro{\the\lastskip}%
+ \whatsitpenalty = \lastpenalty
+ %
+ % If \lastskip is nonzero, that means the last item was a
+ % skip. And since a skip is discardable, that means this
+ % -\whatsitskip glue we're inserting is preceded by a
+ % non-discardable item, therefore it is not a potential
+ % breakpoint, therefore no \nobreak needed.
+ \ifx\lastskipmacro\zeroskipmacro
+ \else
+ \vskip-\whatsitskip
+ \fi
+ %
+ #1%
+ %
+ \ifx\lastskipmacro\zeroskipmacro
+ % If \lastskip was zero, perhaps the last item was a penalty, and
+ % perhaps it was >=10000, e.g., a \nobreak. In that case, we want
+ % to re-insert the same penalty (values >10000 are used for various
+ % signals); since we just inserted a non-discardable item, any
+ % following glue (such as a \parskip) would be a breakpoint. For example:
+ %
+ % @deffn deffn-whatever
+ % @vindex index-whatever
+ % Description.
+ % would allow a break between the index-whatever whatsit
+ % and the "Description." paragraph.
+ \ifnum\whatsitpenalty>9999 \penalty\whatsitpenalty \fi
+ \else
+ % On the other hand, if we had a nonzero \lastskip,
+ % this make-up glue would be preceded by a non-discardable item
+ % (the whatsit from the \write), so we must insert a \nobreak.
+ \nobreak\vskip\whatsitskip
+ \fi
+\fi
+}
+
+% The index entry written in the file actually looks like
+% \entry {sortstring}{page}{topic}
+% or
+% \entry {sortstring}{page}{topic}{subtopic}
+% The texindex program reads in these files and writes files
+% containing these kinds of lines:
+% \initial {c}
+% before the first topic whose initial is c
+% \entry {topic}{pagelist}
+% for a topic that is used without subtopics
+% \primary {topic}
+% for the beginning of a topic that is used with subtopics
+% \secondary {subtopic}{pagelist}
+% for each subtopic.
+
+% Define the user-accessible indexing commands
+% @findex, @vindex, @kindex, @cindex.
+
+\def\findex {\fnindex}
+\def\kindex {\kyindex}
+\def\cindex {\cpindex}
+\def\vindex {\vrindex}
+\def\tindex {\tpindex}
+\def\pindex {\pgindex}
+
+\def\cindexsub {\begingroup\obeylines\cindexsub}
+{\obeylines %
+\gdef\cindexsub "#1" #2^^M{\endgroup %
+\dosubind{cp}{#2}{#1}}}
+
+% Define the macros used in formatting output of the sorted index material.
+
+% @printindex causes a particular index (the ??s file) to get printed.
+% It does not print any chapter heading (usually an @unnumbered).
+%
+\parseargdef\printindex{\begingroup
+ \dobreak \chapheadingskip{10000}%
+ %
+ \smallfonts \rm
+ \tolerance = 9500
+ \plainfrenchspacing
+ \everypar = {}% don't want the \kern\-parindent from indentation suppression.
+ %
+ % See if the index file exists and is nonempty.
+ % Change catcode of @ here so that if the index file contains
+ % \initial {@}
+ % as its first line, TeX doesn't complain about mismatched braces
+ % (because it thinks @} is a control sequence).
+ \catcode`\@ = 11
+ \openin 1 \jobname.#1s
+ \ifeof 1
+ % \enddoublecolumns gets confused if there is no text in the index,
+ % and it loses the chapter title and the aux file entries for the
+ % index. The easiest way to prevent this problem is to make sure
+ % there is some text.
+ \putwordIndexNonexistent
+ \else
+ %
+ % If the index file exists but is empty, then \openin leaves \ifeof
+ % false. We have to make TeX try to read something from the file, so
+ % it can discover if there is anything in it.
+ \read 1 to \temp
+ \ifeof 1
+ \putwordIndexIsEmpty
+ \else
+ % Index files are almost Texinfo source, but we use \ as the escape
+ % character. It would be better to use @, but that's too big a change
+ % to make right now.
+ \def\indexbackslash{\backslashcurfont}%
+ \catcode`\\ = 0
+ \escapechar = `\\
+ \begindoublecolumns
+ \input \jobname.#1s
+ \enddoublecolumns
+ \fi
+ \fi
+ \closein 1
+\endgroup}
+
+% These macros are used by the sorted index file itself.
+% Change them to control the appearance of the index.
+
+\def\initial#1{{%
+ % Some minor font changes for the special characters.
+ \let\tentt=\sectt \let\tt=\sectt \let\sf=\sectt
+ %
+ % Remove any glue we may have, we'll be inserting our own.
+ \removelastskip
+ %
+ % We like breaks before the index initials, so insert a bonus.
+ \nobreak
+ \vskip 0pt plus 3\baselineskip
+ \penalty 0
+ \vskip 0pt plus -3\baselineskip
+ %
+ % Typeset the initial. Making this add up to a whole number of
+ % baselineskips increases the chance of the dots lining up from column
+ % to column. It still won't often be perfect, because of the stretch
+ % we need before each entry, but it's better.
+ %
+ % No shrink because it confuses \balancecolumns.
+ \vskip 1.67\baselineskip plus .5\baselineskip
+ \leftline{\secbf #1}%
+ % Do our best not to break after the initial.
+ \nobreak
+ \vskip .33\baselineskip plus .1\baselineskip
+}}
+
+% \entry typesets a paragraph consisting of the text (#1), dot leaders, and
+% then page number (#2) flushed to the right margin. It is used for index
+% and table of contents entries. The paragraph is indented by \leftskip.
+%
+% A straightforward implementation would start like this:
+% \def\entry#1#2{...
+% But this frozes the catcodes in the argument, and can cause problems to
+% @code, which sets - active. This problem was fixed by a kludge---
+% ``-'' was active throughout whole index, but this isn't really right.
+%
+% The right solution is to prevent \entry from swallowing the whole text.
+% --kasal, 21nov03
+\def\entry{%
+ \begingroup
+ %
+ % Start a new paragraph if necessary, so our assignments below can't
+ % affect previous text.
+ \par
+ %
+ % Do not fill out the last line with white space.
+ \parfillskip = 0in
+ %
+ % No extra space above this paragraph.
+ \parskip = 0in
+ %
+ % Do not prefer a separate line ending with a hyphen to fewer lines.
+ \finalhyphendemerits = 0
+ %
+ % \hangindent is only relevant when the entry text and page number
+ % don't both fit on one line. In that case, bob suggests starting the
+ % dots pretty far over on the line. Unfortunately, a large
+ % indentation looks wrong when the entry text itself is broken across
+ % lines. So we use a small indentation and put up with long leaders.
+ %
+ % \hangafter is reset to 1 (which is the value we want) at the start
+ % of each paragraph, so we need not do anything with that.
+ \hangindent = 2em
+ %
+ % When the entry text needs to be broken, just fill out the first line
+ % with blank space.
+ \rightskip = 0pt plus1fil
+ %
+ % A bit of stretch before each entry for the benefit of balancing
+ % columns.
+ \vskip 0pt plus1pt
+ %
+ % Swallow the left brace of the text (first parameter):
+ \afterassignment\doentry
+ \let\temp =
+}
+\def\doentry{%
+ \bgroup % Instead of the swallowed brace.
+ \noindent
+ \aftergroup\finishentry
+ % And now comes the text of the entry.
+}
+\def\finishentry#1{%
+ % #1 is the page number.
+ %
+ % The following is kludged to not output a line of dots in the index if
+ % there are no page numbers. The next person who breaks this will be
+ % cursed by a Unix daemon.
+ \setbox\boxA = \hbox{#1}%
+ \ifdim\wd\boxA = 0pt
+ \ %
+ \else
+ %
+ % If we must, put the page number on a line of its own, and fill out
+ % this line with blank space. (The \hfil is overwhelmed with the
+ % fill leaders glue in \indexdotfill if the page number does fit.)
+ \hfil\penalty50
+ \null\nobreak\indexdotfill % Have leaders before the page number.
+ %
+ % The `\ ' here is removed by the implicit \unskip that TeX does as
+ % part of (the primitive) \par. Without it, a spurious underfull
+ % \hbox ensues.
+ \ifpdf
+ \pdfgettoks#1.%
+ \ \the\toksA
+ \else
+ \ #1%
+ \fi
+ \fi
+ \par
+ \endgroup
+}
+
+% Like plain.tex's \dotfill, except uses up at least 1 em.
+\def\indexdotfill{\cleaders
+ \hbox{$\mathsurround=0pt \mkern1.5mu.\mkern1.5mu$}\hskip 1em plus 1fill}
+
+\def\primary #1{\line{#1\hfil}}
+
+\newskip\secondaryindent \secondaryindent=0.5cm
+\def\secondary#1#2{{%
+ \parfillskip=0in
+ \parskip=0in
+ \hangindent=1in
+ \hangafter=1
+ \noindent\hskip\secondaryindent\hbox{#1}\indexdotfill
+ \ifpdf
+ \pdfgettoks#2.\ \the\toksA % The page number ends the paragraph.
+ \else
+ #2
+ \fi
+ \par
+}}
+
+% Define two-column mode, which we use to typeset indexes.
+% Adapted from the TeXbook, page 416, which is to say,
+% the manmac.tex format used to print the TeXbook itself.
+\catcode`\@=11
+
+\newbox\partialpage
+\newdimen\doublecolumnhsize
+
+\def\begindoublecolumns{\begingroup % ended by \enddoublecolumns
+ % Grab any single-column material above us.
+ \output = {%
+ %
+ % Here is a possibility not foreseen in manmac: if we accumulate a
+ % whole lot of material, we might end up calling this \output
+ % routine twice in a row (see the doublecol-lose test, which is
+ % essentially a couple of indexes with @setchapternewpage off). In
+ % that case we just ship out what is in \partialpage with the normal
+ % output routine. Generally, \partialpage will be empty when this
+ % runs and this will be a no-op. See the indexspread.tex test case.
+ \ifvoid\partialpage \else
+ \onepageout{\pagecontents\partialpage}%
+ \fi
+ %
+ \global\setbox\partialpage = \vbox{%
+ % Unvbox the main output page.
+ \unvbox\PAGE
+ \kern-\topskip \kern\baselineskip
+ }%
+ }%
+ \eject % run that output routine to set \partialpage
+ %
+ % Use the double-column output routine for subsequent pages.
+ \output = {\doublecolumnout}%
+ %
+ % Change the page size parameters. We could do this once outside this
+ % routine, in each of @smallbook, @afourpaper, and the default 8.5x11
+ % format, but then we repeat the same computation. Repeating a couple
+ % of assignments once per index is clearly meaningless for the
+ % execution time, so we may as well do it in one place.
+ %
+ % First we halve the line length, less a little for the gutter between
+ % the columns. We compute the gutter based on the line length, so it
+ % changes automatically with the paper format. The magic constant
+ % below is chosen so that the gutter has the same value (well, +-<1pt)
+ % as it did when we hard-coded it.
+ %
+ % We put the result in a separate register, \doublecolumhsize, so we
+ % can restore it in \pagesofar, after \hsize itself has (potentially)
+ % been clobbered.
+ %
+ \doublecolumnhsize = \hsize
+ \advance\doublecolumnhsize by -.04154\hsize
+ \divide\doublecolumnhsize by 2
+ \hsize = \doublecolumnhsize
+ %
+ % Double the \vsize as well. (We don't need a separate register here,
+ % since nobody clobbers \vsize.)
+ \vsize = 2\vsize
+}
+
+% The double-column output routine for all double-column pages except
+% the last.
+%
+\def\doublecolumnout{%
+ \splittopskip=\topskip \splitmaxdepth=\maxdepth
+ % Get the available space for the double columns -- the normal
+ % (undoubled) page height minus any material left over from the
+ % previous page.
+ \dimen@ = \vsize
+ \divide\dimen@ by 2
+ \advance\dimen@ by -\ht\partialpage
+ %
+ % box0 will be the left-hand column, box2 the right.
+ \setbox0=\vsplit255 to\dimen@ \setbox2=\vsplit255 to\dimen@
+ \onepageout\pagesofar
+ \unvbox255
+ \penalty\outputpenalty
+}
+%
+% Re-output the contents of the output page -- any previous material,
+% followed by the two boxes we just split, in box0 and box2.
+\def\pagesofar{%
+ \unvbox\partialpage
+ %
+ \hsize = \doublecolumnhsize
+ \wd0=\hsize \wd2=\hsize
+ \hbox to\pagewidth{\box0\hfil\box2}%
+}
+%
+% All done with double columns.
+\def\enddoublecolumns{%
+ % The following penalty ensures that the page builder is exercised
+ % _before_ we change the output routine. This is necessary in the
+ % following situation:
+ %
+ % The last section of the index consists only of a single entry.
+ % Before this section, \pagetotal is less than \pagegoal, so no
+ % break occurs before the last section starts. However, the last
+ % section, consisting of \initial and the single \entry, does not
+ % fit on the page and has to be broken off. Without the following
+ % penalty the page builder will not be exercised until \eject
+ % below, and by that time we'll already have changed the output
+ % routine to the \balancecolumns version, so the next-to-last
+ % double-column page will be processed with \balancecolumns, which
+ % is wrong: The two columns will go to the main vertical list, with
+ % the broken-off section in the recent contributions. As soon as
+ % the output routine finishes, TeX starts reconsidering the page
+ % break. The two columns and the broken-off section both fit on the
+ % page, because the two columns now take up only half of the page
+ % goal. When TeX sees \eject from below which follows the final
+ % section, it invokes the new output routine that we've set after
+ % \balancecolumns below; \onepageout will try to fit the two columns
+ % and the final section into the vbox of \pageheight (see
+ % \pagebody), causing an overfull box.
+ %
+ % Note that glue won't work here, because glue does not exercise the
+ % page builder, unlike penalties (see The TeXbook, pp. 280-281).
+ \penalty0
+ %
+ \output = {%
+ % Split the last of the double-column material. Leave it on the
+ % current page, no automatic page break.
+ \balancecolumns
+ %
+ % If we end up splitting too much material for the current page,
+ % though, there will be another page break right after this \output
+ % invocation ends. Having called \balancecolumns once, we do not
+ % want to call it again. Therefore, reset \output to its normal
+ % definition right away. (We hope \balancecolumns will never be
+ % called on to balance too much material, but if it is, this makes
+ % the output somewhat more palatable.)
+ \global\output = {\onepageout{\pagecontents\PAGE}}%
+ }%
+ \eject
+ \endgroup % started in \begindoublecolumns
+ %
+ % \pagegoal was set to the doubled \vsize above, since we restarted
+ % the current page. We're now back to normal single-column
+ % typesetting, so reset \pagegoal to the normal \vsize (after the
+ % \endgroup where \vsize got restored).
+ \pagegoal = \vsize
+}
+%
+% Called at the end of the double column material.
+\def\balancecolumns{%
+ \setbox0 = \vbox{\unvbox255}% like \box255 but more efficient, see p.120.
+ \dimen@ = \ht0
+ \advance\dimen@ by \topskip
+ \advance\dimen@ by-\baselineskip
+ \divide\dimen@ by 2 % target to split to
+ %debug\message{final 2-column material height=\the\ht0, target=\the\dimen@.}%
+ \splittopskip = \topskip
+ % Loop until we get a decent breakpoint.
+ {%
+ \vbadness = 10000
+ \loop
+ \global\setbox3 = \copy0
+ \global\setbox1 = \vsplit3 to \dimen@
+ \ifdim\ht3>\dimen@
+ \global\advance\dimen@ by 1pt
+ \repeat
+ }%
+ %debug\message{split to \the\dimen@, column heights: \the\ht1, \the\ht3.}%
+ \setbox0=\vbox to\dimen@{\unvbox1}%
+ \setbox2=\vbox to\dimen@{\unvbox3}%
+ %
+ \pagesofar
+}
+\catcode`\@ = \other
+
+
+\message{sectioning,}
+% Chapters, sections, etc.
+
+% \unnumberedno is an oxymoron, of course. But we count the unnumbered
+% sections so that we can refer to them unambiguously in the pdf
+% outlines by their "section number". We avoid collisions with chapter
+% numbers by starting them at 10000. (If a document ever has 10000
+% chapters, we're in trouble anyway, I'm sure.)
+\newcount\unnumberedno \unnumberedno = 10000
+\newcount\chapno
+\newcount\secno \secno=0
+\newcount\subsecno \subsecno=0
+\newcount\subsubsecno \subsubsecno=0
+
+% This counter is funny since it counts through charcodes of letters A, B, ...
+\newcount\appendixno \appendixno = `\@
+%
+% \def\appendixletter{\char\the\appendixno}
+% We do the following ugly conditional instead of the above simple
+% construct for the sake of pdftex, which needs the actual
+% letter in the expansion, not just typeset.
+%
+\def\appendixletter{%
+ \ifnum\appendixno=`A A%
+ \else\ifnum\appendixno=`B B%
+ \else\ifnum\appendixno=`C C%
+ \else\ifnum\appendixno=`D D%
+ \else\ifnum\appendixno=`E E%
+ \else\ifnum\appendixno=`F F%
+ \else\ifnum\appendixno=`G G%
+ \else\ifnum\appendixno=`H H%
+ \else\ifnum\appendixno=`I I%
+ \else\ifnum\appendixno=`J J%
+ \else\ifnum\appendixno=`K K%
+ \else\ifnum\appendixno=`L L%
+ \else\ifnum\appendixno=`M M%
+ \else\ifnum\appendixno=`N N%
+ \else\ifnum\appendixno=`O O%
+ \else\ifnum\appendixno=`P P%
+ \else\ifnum\appendixno=`Q Q%
+ \else\ifnum\appendixno=`R R%
+ \else\ifnum\appendixno=`S S%
+ \else\ifnum\appendixno=`T T%
+ \else\ifnum\appendixno=`U U%
+ \else\ifnum\appendixno=`V V%
+ \else\ifnum\appendixno=`W W%
+ \else\ifnum\appendixno=`X X%
+ \else\ifnum\appendixno=`Y Y%
+ \else\ifnum\appendixno=`Z Z%
+ % The \the is necessary, despite appearances, because \appendixletter is
+ % expanded while writing the .toc file. \char\appendixno is not
+ % expandable, thus it is written literally, thus all appendixes come out
+ % with the same letter (or @) in the toc without it.
+ \else\char\the\appendixno
+ \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
+ \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi}
+
+% Each @chapter defines these (using marks) as the number+name, number
+% and name of the chapter. Page headings and footings can use
+% these. @section does likewise.
+\def\thischapter{}
+\def\thischapternum{}
+\def\thischaptername{}
+\def\thissection{}
+\def\thissectionnum{}
+\def\thissectionname{}
+
+\newcount\absseclevel % used to calculate proper heading level
+\newcount\secbase\secbase=0 % @raisesections/@lowersections modify this count
+
+% @raisesections: treat @section as chapter, @subsection as section, etc.
+\def\raisesections{\global\advance\secbase by -1}
+\let\up=\raisesections % original BFox name
+
+% @lowersections: treat @chapter as section, @section as subsection, etc.
+\def\lowersections{\global\advance\secbase by 1}
+\let\down=\lowersections % original BFox name
+
+% we only have subsub.
+\chardef\maxseclevel = 3
+%
+% A numbered section within an unnumbered changes to unnumbered too.
+% To achive this, remember the "biggest" unnum. sec. we are currently in:
+\chardef\unmlevel = \maxseclevel
+%
+% Trace whether the current chapter is an appendix or not:
+% \chapheadtype is "N" or "A", unnumbered chapters are ignored.
+\def\chapheadtype{N}
+
+% Choose a heading macro
+% #1 is heading type
+% #2 is heading level
+% #3 is text for heading
+\def\genhead#1#2#3{%
+ % Compute the abs. sec. level:
+ \absseclevel=#2
+ \advance\absseclevel by \secbase
+ % Make sure \absseclevel doesn't fall outside the range:
+ \ifnum \absseclevel < 0
+ \absseclevel = 0
+ \else
+ \ifnum \absseclevel > 3
+ \absseclevel = 3
+ \fi
+ \fi
+ % The heading type:
+ \def\headtype{#1}%
+ \if \headtype U%
+ \ifnum \absseclevel < \unmlevel
+ \chardef\unmlevel = \absseclevel
+ \fi
+ \else
+ % Check for appendix sections:
+ \ifnum \absseclevel = 0
+ \edef\chapheadtype{\headtype}%
+ \else
+ \if \headtype A\if \chapheadtype N%
+ \errmessage{@appendix... within a non-appendix chapter}%
+ \fi\fi
+ \fi
+ % Check for numbered within unnumbered:
+ \ifnum \absseclevel > \unmlevel
+ \def\headtype{U}%
+ \else
+ \chardef\unmlevel = 3
+ \fi
+ \fi
+ % Now print the heading:
+ \if \headtype U%
+ \ifcase\absseclevel
+ \unnumberedzzz{#3}%
+ \or \unnumberedseczzz{#3}%
+ \or \unnumberedsubseczzz{#3}%
+ \or \unnumberedsubsubseczzz{#3}%
+ \fi
+ \else
+ \if \headtype A%
+ \ifcase\absseclevel
+ \appendixzzz{#3}%
+ \or \appendixsectionzzz{#3}%
+ \or \appendixsubseczzz{#3}%
+ \or \appendixsubsubseczzz{#3}%
+ \fi
+ \else
+ \ifcase\absseclevel
+ \chapterzzz{#3}%
+ \or \seczzz{#3}%
+ \or \numberedsubseczzz{#3}%
+ \or \numberedsubsubseczzz{#3}%
+ \fi
+ \fi
+ \fi
+ \suppressfirstparagraphindent
+}
+
+% an interface:
+\def\numhead{\genhead N}
+\def\apphead{\genhead A}
+\def\unnmhead{\genhead U}
+
+% @chapter, @appendix, @unnumbered. Increment top-level counter, reset
+% all lower-level sectioning counters to zero.
+%
+% Also set \chaplevelprefix, which we prepend to @float sequence numbers
+% (e.g., figures), q.v. By default (before any chapter), that is empty.
+\let\chaplevelprefix = \empty
+%
+\outer\parseargdef\chapter{\numhead0{#1}} % normally numhead0 calls chapterzzz
+\def\chapterzzz#1{%
+ % section resetting is \global in case the chapter is in a group, such
+ % as an @include file.
+ \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
+ \global\advance\chapno by 1
+ %
+ % Used for \float.
+ \gdef\chaplevelprefix{\the\chapno.}%
+ \resetallfloatnos
+ %
+ \message{\putwordChapter\space \the\chapno}%
+ %
+ % Write the actual heading.
+ \chapmacro{#1}{Ynumbered}{\the\chapno}%
+ %
+ % So @section and the like are numbered underneath this chapter.
+ \global\let\section = \numberedsec
+ \global\let\subsection = \numberedsubsec
+ \global\let\subsubsection = \numberedsubsubsec
+}
+
+\outer\parseargdef\appendix{\apphead0{#1}} % normally apphead0 calls appendixzzz
+\def\appendixzzz#1{%
+ \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
+ \global\advance\appendixno by 1
+ \gdef\chaplevelprefix{\appendixletter.}%
+ \resetallfloatnos
+ %
+ \def\appendixnum{\putwordAppendix\space \appendixletter}%
+ \message{\appendixnum}%
+ %
+ \chapmacro{#1}{Yappendix}{\appendixletter}%
+ %
+ \global\let\section = \appendixsec
+ \global\let\subsection = \appendixsubsec
+ \global\let\subsubsection = \appendixsubsubsec
+}
+
+\outer\parseargdef\unnumbered{\unnmhead0{#1}} % normally unnmhead0 calls unnumberedzzz
+\def\unnumberedzzz#1{%
+ \global\secno=0 \global\subsecno=0 \global\subsubsecno=0
+ \global\advance\unnumberedno by 1
+ %
+ % Since an unnumbered has no number, no prefix for figures.
+ \global\let\chaplevelprefix = \empty
+ \resetallfloatnos
+ %
+ % This used to be simply \message{#1}, but TeX fully expands the
+ % argument to \message. Therefore, if #1 contained @-commands, TeX
+ % expanded them. For example, in `@unnumbered The @cite{Book}', TeX
+ % expanded @cite (which turns out to cause errors because \cite is meant
+ % to be executed, not expanded).
+ %
+ % Anyway, we don't want the fully-expanded definition of @cite to appear
+ % as a result of the \message, we just want `@cite' itself. We use
+ % \the<toks register> to achieve this: TeX expands \the<toks> only once,
+ % simply yielding the contents of <toks register>. (We also do this for
+ % the toc entries.)
+ \toks0 = {#1}%
+ \message{(\the\toks0)}%
+ %
+ \chapmacro{#1}{Ynothing}{\the\unnumberedno}%
+ %
+ \global\let\section = \unnumberedsec
+ \global\let\subsection = \unnumberedsubsec
+ \global\let\subsubsection = \unnumberedsubsubsec
+}
+
+% @centerchap is like @unnumbered, but the heading is centered.
+\outer\parseargdef\centerchap{%
+ % Well, we could do the following in a group, but that would break
+ % an assumption that \chapmacro is called at the outermost level.
+ % Thus we are safer this way: --kasal, 24feb04
+ \let\centerparametersmaybe = \centerparameters
+ \unnmhead0{#1}%
+ \let\centerparametersmaybe = \relax
+}
+
+% @top is like @unnumbered.
+\let\top\unnumbered
+
+% Sections.
+\outer\parseargdef\numberedsec{\numhead1{#1}} % normally calls seczzz
+\def\seczzz#1{%
+ \global\subsecno=0 \global\subsubsecno=0 \global\advance\secno by 1
+ \sectionheading{#1}{sec}{Ynumbered}{\the\chapno.\the\secno}%
+}
+
+\outer\parseargdef\appendixsection{\apphead1{#1}} % normally calls appendixsectionzzz
+\def\appendixsectionzzz#1{%
+ \global\subsecno=0 \global\subsubsecno=0 \global\advance\secno by 1
+ \sectionheading{#1}{sec}{Yappendix}{\appendixletter.\the\secno}%
+}
+\let\appendixsec\appendixsection
+
+\outer\parseargdef\unnumberedsec{\unnmhead1{#1}} % normally calls unnumberedseczzz
+\def\unnumberedseczzz#1{%
+ \global\subsecno=0 \global\subsubsecno=0 \global\advance\secno by 1
+ \sectionheading{#1}{sec}{Ynothing}{\the\unnumberedno.\the\secno}%
+}
+
+% Subsections.
+\outer\parseargdef\numberedsubsec{\numhead2{#1}} % normally calls numberedsubseczzz
+\def\numberedsubseczzz#1{%
+ \global\subsubsecno=0 \global\advance\subsecno by 1
+ \sectionheading{#1}{subsec}{Ynumbered}{\the\chapno.\the\secno.\the\subsecno}%
+}
+
+\outer\parseargdef\appendixsubsec{\apphead2{#1}} % normally calls appendixsubseczzz
+\def\appendixsubseczzz#1{%
+ \global\subsubsecno=0 \global\advance\subsecno by 1
+ \sectionheading{#1}{subsec}{Yappendix}%
+ {\appendixletter.\the\secno.\the\subsecno}%
+}
+
+\outer\parseargdef\unnumberedsubsec{\unnmhead2{#1}} %normally calls unnumberedsubseczzz
+\def\unnumberedsubseczzz#1{%
+ \global\subsubsecno=0 \global\advance\subsecno by 1
+ \sectionheading{#1}{subsec}{Ynothing}%
+ {\the\unnumberedno.\the\secno.\the\subsecno}%
+}
+
+% Subsubsections.
+\outer\parseargdef\numberedsubsubsec{\numhead3{#1}} % normally numberedsubsubseczzz
+\def\numberedsubsubseczzz#1{%
+ \global\advance\subsubsecno by 1
+ \sectionheading{#1}{subsubsec}{Ynumbered}%
+ {\the\chapno.\the\secno.\the\subsecno.\the\subsubsecno}%
+}
+
+\outer\parseargdef\appendixsubsubsec{\apphead3{#1}} % normally appendixsubsubseczzz
+\def\appendixsubsubseczzz#1{%
+ \global\advance\subsubsecno by 1
+ \sectionheading{#1}{subsubsec}{Yappendix}%
+ {\appendixletter.\the\secno.\the\subsecno.\the\subsubsecno}%
+}
+
+\outer\parseargdef\unnumberedsubsubsec{\unnmhead3{#1}} %normally unnumberedsubsubseczzz
+\def\unnumberedsubsubseczzz#1{%
+ \global\advance\subsubsecno by 1
+ \sectionheading{#1}{subsubsec}{Ynothing}%
+ {\the\unnumberedno.\the\secno.\the\subsecno.\the\subsubsecno}%
+}
+
+% These macros control what the section commands do, according
+% to what kind of chapter we are in (ordinary, appendix, or unnumbered).
+% Define them by default for a numbered chapter.
+\let\section = \numberedsec
+\let\subsection = \numberedsubsec
+\let\subsubsection = \numberedsubsubsec
+
+% Define @majorheading, @heading and @subheading
+
+% NOTE on use of \vbox for chapter headings, section headings, and such:
+% 1) We use \vbox rather than the earlier \line to permit
+% overlong headings to fold.
+% 2) \hyphenpenalty is set to 10000 because hyphenation in a
+% heading is obnoxious; this forbids it.
+% 3) Likewise, headings look best if no \parindent is used, and
+% if justification is not attempted. Hence \raggedright.
+
+
+\def\majorheading{%
+ {\advance\chapheadingskip by 10pt \chapbreak }%
+ \parsearg\chapheadingzzz
+}
+
+\def\chapheading{\chapbreak \parsearg\chapheadingzzz}
+\def\chapheadingzzz#1{%
+ {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
+ \parindent=0pt\raggedright
+ \rm #1\hfill}}%
+ \bigskip \par\penalty 200\relax
+ \suppressfirstparagraphindent
+}
+
+% @heading, @subheading, @subsubheading.
+\parseargdef\heading{\sectionheading{#1}{sec}{Yomitfromtoc}{}
+ \suppressfirstparagraphindent}
+\parseargdef\subheading{\sectionheading{#1}{subsec}{Yomitfromtoc}{}
+ \suppressfirstparagraphindent}
+\parseargdef\subsubheading{\sectionheading{#1}{subsubsec}{Yomitfromtoc}{}
+ \suppressfirstparagraphindent}
+
+% These macros generate a chapter, section, etc. heading only
+% (including whitespace, linebreaking, etc. around it),
+% given all the information in convenient, parsed form.
+
+%%% Args are the skip and penalty (usually negative)
+\def\dobreak#1#2{\par\ifdim\lastskip<#1\removelastskip\penalty#2\vskip#1\fi}
+
+%%% Define plain chapter starts, and page on/off switching for it
+% Parameter controlling skip before chapter headings (if needed)
+
+\newskip\chapheadingskip
+
+\def\chapbreak{\dobreak \chapheadingskip {-4000}}
+\def\chappager{\par\vfill\supereject}
+% Because \domark is called before \chapoddpage, the filler page will
+% get the headings for the next chapter, which is wrong. But we don't
+% care -- we just disable all headings on the filler page.
+\def\chapoddpage{%
+ \chappager
+ \ifodd\pageno \else
+ \begingroup
+ \evenheadline={\hfil}\evenfootline={\hfil}%
+ \oddheadline={\hfil}\oddfootline={\hfil}%
+ \hbox to 0pt{}%
+ \chappager
+ \endgroup
+ \fi
+}
+
+\def\setchapternewpage #1 {\csname CHAPPAG#1\endcsname}
+
+\def\CHAPPAGoff{%
+\global\let\contentsalignmacro = \chappager
+\global\let\pchapsepmacro=\chapbreak
+\global\let\pagealignmacro=\chappager}
+
+\def\CHAPPAGon{%
+\global\let\contentsalignmacro = \chappager
+\global\let\pchapsepmacro=\chappager
+\global\let\pagealignmacro=\chappager
+\global\def\HEADINGSon{\HEADINGSsingle}}
+
+\def\CHAPPAGodd{%
+\global\let\contentsalignmacro = \chapoddpage
+\global\let\pchapsepmacro=\chapoddpage
+\global\let\pagealignmacro=\chapoddpage
+\global\def\HEADINGSon{\HEADINGSdouble}}
+
+\CHAPPAGon
+
+% Chapter opening.
+%
+% #1 is the text, #2 is the section type (Ynumbered, Ynothing,
+% Yappendix, Yomitfromtoc), #3 the chapter number.
+%
+% To test against our argument.
+\def\Ynothingkeyword{Ynothing}
+\def\Yomitfromtockeyword{Yomitfromtoc}
+\def\Yappendixkeyword{Yappendix}
+%
+\def\chapmacro#1#2#3{%
+ % Insert the first mark before the heading break (see notes for \domark).
+ \let\prevchapterdefs=\lastchapterdefs
+ \let\prevsectiondefs=\lastsectiondefs
+ \gdef\lastsectiondefs{\gdef\thissectionname{}\gdef\thissectionnum{}%
+ \gdef\thissection{}}%
+ %
+ \def\temptype{#2}%
+ \ifx\temptype\Ynothingkeyword
+ \gdef\lastchapterdefs{\gdef\thischaptername{#1}\gdef\thischapternum{}%
+ \gdef\thischapter{\thischaptername}}%
+ \else\ifx\temptype\Yomitfromtockeyword
+ \gdef\lastchapterdefs{\gdef\thischaptername{#1}\gdef\thischapternum{}%
+ \gdef\thischapter{}}%
+ \else\ifx\temptype\Yappendixkeyword
+ \toks0={#1}%
+ \xdef\lastchapterdefs{%
+ \gdef\noexpand\thischaptername{\the\toks0}%
+ \gdef\noexpand\thischapternum{\appendixletter}%
+ \gdef\noexpand\thischapter{\putwordAppendix{} \noexpand\thischapternum:
+ \noexpand\thischaptername}%
+ }%
+ \else
+ \toks0={#1}%
+ \xdef\lastchapterdefs{%
+ \gdef\noexpand\thischaptername{\the\toks0}%
+ \gdef\noexpand\thischapternum{\the\chapno}%
+ \gdef\noexpand\thischapter{\putwordChapter{} \noexpand\thischapternum:
+ \noexpand\thischaptername}%
+ }%
+ \fi\fi\fi
+ %
+ % Output the mark. Pass it through \safewhatsit, to take care of
+ % the preceding space.
+ \safewhatsit\domark
+ %
+ % Insert the chapter heading break.
+ \pchapsepmacro
+ %
+ % Now the second mark, after the heading break. No break points
+ % between here and the heading.
+ \let\prevchapterdefs=\lastchapterdefs
+ \let\prevsectiondefs=\lastsectiondefs
+ \domark
+ %
+ {%
+ \chapfonts \rm
+ %
+ % Have to define \lastsection before calling \donoderef, because the
+ % xref code eventually uses it. On the other hand, it has to be called
+ % after \pchapsepmacro, or the headline will change too soon.
+ \gdef\lastsection{#1}%
+ %
+ % Only insert the separating space if we have a chapter/appendix
+ % number, and don't print the unnumbered ``number''.
+ \ifx\temptype\Ynothingkeyword
+ \setbox0 = \hbox{}%
+ \def\toctype{unnchap}%
+ \else\ifx\temptype\Yomitfromtockeyword
+ \setbox0 = \hbox{}% contents like unnumbered, but no toc entry
+ \def\toctype{omit}%
+ \else\ifx\temptype\Yappendixkeyword
+ \setbox0 = \hbox{\putwordAppendix{} #3\enspace}%
+ \def\toctype{app}%
+ \else
+ \setbox0 = \hbox{#3\enspace}%
+ \def\toctype{numchap}%
+ \fi\fi\fi
+ %
+ % Write the toc entry for this chapter. Must come before the
+ % \donoderef, because we include the current node name in the toc
+ % entry, and \donoderef resets it to empty.
+ \writetocentry{\toctype}{#1}{#3}%
+ %
+ % For pdftex, we have to write out the node definition (aka, make
+ % the pdfdest) after any page break, but before the actual text has
+ % been typeset. If the destination for the pdf outline is after the
+ % text, then jumping from the outline may wind up with the text not
+ % being visible, for instance under high magnification.
+ \donoderef{#2}%
+ %
+ % Typeset the actual heading.
+ \nobreak % Avoid page breaks at the interline glue.
+ \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \raggedright
+ \hangindent=\wd0 \centerparametersmaybe
+ \unhbox0 #1\par}%
+ }%
+ \nobreak\bigskip % no page break after a chapter title
+ \nobreak
+}
+
+% @centerchap -- centered and unnumbered.
+\let\centerparametersmaybe = \relax
+\def\centerparameters{%
+ \advance\rightskip by 3\rightskip
+ \leftskip = \rightskip
+ \parfillskip = 0pt
+}
+
+
+% I don't think this chapter style is supported any more, so I'm not
+% updating it with the new noderef stuff. We'll see. --karl, 11aug03.
+%
+\def\setchapterstyle #1 {\csname CHAPF#1\endcsname}
+%
+\def\unnchfopen #1{%
+\chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
+ \parindent=0pt\raggedright
+ \rm #1\hfill}}\bigskip \par\nobreak
+}
+\def\chfopen #1#2{\chapoddpage {\chapfonts
+\vbox to 3in{\vfil \hbox to\hsize{\hfil #2} \hbox to\hsize{\hfil #1} \vfil}}%
+\par\penalty 5000 %
+}
+\def\centerchfopen #1{%
+\chapoddpage {\chapfonts \vbox{\hyphenpenalty=10000\tolerance=5000
+ \parindent=0pt
+ \hfill {\rm #1}\hfill}}\bigskip \par\nobreak
+}
+\def\CHAPFopen{%
+ \global\let\chapmacro=\chfopen
+ \global\let\centerchapmacro=\centerchfopen}
+
+
+% Section titles. These macros combine the section number parts and
+% call the generic \sectionheading to do the printing.
+%
+\newskip\secheadingskip
+\def\secheadingbreak{\dobreak \secheadingskip{-1000}}
+
+% Subsection titles.
+\newskip\subsecheadingskip
+\def\subsecheadingbreak{\dobreak \subsecheadingskip{-500}}
+
+% Subsubsection titles.
+\def\subsubsecheadingskip{\subsecheadingskip}
+\def\subsubsecheadingbreak{\subsecheadingbreak}
+
+
+% Print any size, any type, section title.
+%
+% #1 is the text, #2 is the section level (sec/subsec/subsubsec), #3 is
+% the section type for xrefs (Ynumbered, Ynothing, Yappendix), #4 is the
+% section number.
+%
+\def\seckeyword{sec}
+%
+\def\sectionheading#1#2#3#4{%
+ {%
+ % Switch to the right set of fonts.
+ \csname #2fonts\endcsname \rm
+ %
+ \def\sectionlevel{#2}%
+ \def\temptype{#3}%
+ %
+ % Insert first mark before the heading break (see notes for \domark).
+ \let\prevsectiondefs=\lastsectiondefs
+ \ifx\temptype\Ynothingkeyword
+ \ifx\sectionlevel\seckeyword
+ \gdef\lastsectiondefs{\gdef\thissectionname{#1}\gdef\thissectionnum{}%
+ \gdef\thissection{\thissectionname}}%
+ \fi
+ \else\ifx\temptype\Yomitfromtockeyword
+ % Don't redefine \thissection.
+ \else\ifx\temptype\Yappendixkeyword
+ \ifx\sectionlevel\seckeyword
+ \toks0={#1}%
+ \xdef\lastsectiondefs{%
+ \gdef\noexpand\thissectionname{\the\toks0}%
+ \gdef\noexpand\thissectionnum{#4}%
+ \gdef\noexpand\thissection{\putwordSection{} \noexpand\thissectionnum:
+ \noexpand\thissectionname}%
+ }%
+ \fi
+ \else
+ \ifx\sectionlevel\seckeyword
+ \toks0={#1}%
+ \xdef\lastsectiondefs{%
+ \gdef\noexpand\thissectionname{\the\toks0}%
+ \gdef\noexpand\thissectionnum{#4}%
+ \gdef\noexpand\thissection{\putwordSection{} \noexpand\thissectionnum:
+ \noexpand\thissectionname}%
+ }%
+ \fi
+ \fi\fi\fi
+ %
+ % Output the mark. Pass it through \safewhatsit, to take care of
+ % the preceding space.
+ \safewhatsit\domark
+ %
+ % Insert space above the heading.
+ \csname #2headingbreak\endcsname
+ %
+ % Now the second mark, after the heading break. No break points
+ % between here and the heading.
+ \let\prevsectiondefs=\lastsectiondefs
+ \domark
+ %
+ % Only insert the space after the number if we have a section number.
+ \ifx\temptype\Ynothingkeyword
+ \setbox0 = \hbox{}%
+ \def\toctype{unn}%
+ \gdef\lastsection{#1}%
+ \else\ifx\temptype\Yomitfromtockeyword
+ % for @headings -- no section number, don't include in toc,
+ % and don't redefine \lastsection.
+ \setbox0 = \hbox{}%
+ \def\toctype{omit}%
+ \let\sectionlevel=\empty
+ \else\ifx\temptype\Yappendixkeyword
+ \setbox0 = \hbox{#4\enspace}%
+ \def\toctype{app}%
+ \gdef\lastsection{#1}%
+ \else
+ \setbox0 = \hbox{#4\enspace}%
+ \def\toctype{num}%
+ \gdef\lastsection{#1}%
+ \fi\fi\fi
+ %
+ % Write the toc entry (before \donoderef). See comments in \chapmacro.
+ \writetocentry{\toctype\sectionlevel}{#1}{#4}%
+ %
+ % Write the node reference (= pdf destination for pdftex).
+ % Again, see comments in \chapmacro.
+ \donoderef{#3}%
+ %
+ % Interline glue will be inserted when the vbox is completed.
+ % That glue will be a valid breakpoint for the page, since it'll be
+ % preceded by a whatsit (usually from the \donoderef, or from the
+ % \writetocentry if there was no node). We don't want to allow that
+ % break, since then the whatsits could end up on page n while the
+ % section is on page n+1, thus toc/etc. are wrong. Debian bug 276000.
+ \nobreak
+ %
+ % Output the actual section heading.
+ \vbox{\hyphenpenalty=10000 \tolerance=5000 \parindent=0pt \raggedright
+ \hangindent=\wd0 % zero if no section number
+ \unhbox0 #1}%
+ }%
+ % Add extra space after the heading -- half of whatever came above it.
+ % Don't allow stretch, though.
+ \kern .5 \csname #2headingskip\endcsname
+ %
+ % Do not let the kern be a potential breakpoint, as it would be if it
+ % was followed by glue.
+ \nobreak
+ %
+ % We'll almost certainly start a paragraph next, so don't let that
+ % glue accumulate. (Not a breakpoint because it's preceded by a
+ % discardable item.)
+ \vskip-\parskip
+ %
+ % This is purely so the last item on the list is a known \penalty >
+ % 10000. This is so \startdefun can avoid allowing breakpoints after
+ % section headings. Otherwise, it would insert a valid breakpoint between:
+ %
+ % @section sec-whatever
+ % @deffn def-whatever
+ \penalty 10001
+}
+
+
+\message{toc,}
+% Table of contents.
+\newwrite\tocfile
+
+% Write an entry to the toc file, opening it if necessary.
+% Called from @chapter, etc.
+%
+% Example usage: \writetocentry{sec}{Section Name}{\the\chapno.\the\secno}
+% We append the current node name (if any) and page number as additional
+% arguments for the \{chap,sec,...}entry macros which will eventually
+% read this. The node name is used in the pdf outlines as the
+% destination to jump to.
+%
+% We open the .toc file for writing here instead of at @setfilename (or
+% any other fixed time) so that @contents can be anywhere in the document.
+% But if #1 is `omit', then we don't do anything. This is used for the
+% table of contents chapter openings themselves.
+%
+\newif\iftocfileopened
+\def\omitkeyword{omit}%
+%
+\def\writetocentry#1#2#3{%
+ \edef\writetoctype{#1}%
+ \ifx\writetoctype\omitkeyword \else
+ \iftocfileopened\else
+ \immediate\openout\tocfile = \jobname.toc
+ \global\tocfileopenedtrue
+ \fi
+ %
+ \iflinks
+ {\atdummies
+ \edef\temp{%
+ \write\tocfile{@#1entry{#2}{#3}{\lastnode}{\noexpand\folio}}}%
+ \temp
+ }%
+ \fi
+ \fi
+ %
+ % Tell \shipout to create a pdf destination on each page, if we're
+ % writing pdf. These are used in the table of contents. We can't
+ % just write one on every page because the title pages are numbered
+ % 1 and 2 (the page numbers aren't printed), and so are the first
+ % two pages of the document. Thus, we'd have two destinations named
+ % `1', and two named `2'.
+ \ifpdf \global\pdfmakepagedesttrue \fi
+}
+
+
+% These characters do not print properly in the Computer Modern roman
+% fonts, so we must take special care. This is more or less redundant
+% with the Texinfo input format setup at the end of this file.
+%
+\def\activecatcodes{%
+ \catcode`\"=\active
+ \catcode`\$=\active
+ \catcode`\<=\active
+ \catcode`\>=\active
+ \catcode`\\=\active
+ \catcode`\^=\active
+ \catcode`\_=\active
+ \catcode`\|=\active
+ \catcode`\~=\active
+}
+
+
+% Read the toc file, which is essentially Texinfo input.
+\def\readtocfile{%
+ \setupdatafile
+ \activecatcodes
+ \input \tocreadfilename
+}
+
+\newskip\contentsrightmargin \contentsrightmargin=1in
+\newcount\savepageno
+\newcount\lastnegativepageno \lastnegativepageno = -1
+
+% Prepare to read what we've written to \tocfile.
+%
+\def\startcontents#1{%
+ % If @setchapternewpage on, and @headings double, the contents should
+ % start on an odd page, unlike chapters. Thus, we maintain
+ % \contentsalignmacro in parallel with \pagealignmacro.
+ % From: Torbjorn Granlund <tege@matematik.su.se>
+ \contentsalignmacro
+ \immediate\closeout\tocfile
+ %
+ % Don't need to put `Contents' or `Short Contents' in the headline.
+ % It is abundantly clear what they are.
+ \chapmacro{#1}{Yomitfromtoc}{}%
+ %
+ \savepageno = \pageno
+ \begingroup % Set up to handle contents files properly.
+ \raggedbottom % Worry more about breakpoints than the bottom.
+ \advance\hsize by -\contentsrightmargin % Don't use the full line length.
+ %
+ % Roman numerals for page numbers.
+ \ifnum \pageno>0 \global\pageno = \lastnegativepageno \fi
+}
+
+% redefined for the two-volume lispref. We always output on
+% \jobname.toc even if this is redefined.
+%
+\def\tocreadfilename{\jobname.toc}
+
+% Normal (long) toc.
+%
+\def\contents{%
+ \startcontents{\putwordTOC}%
+ \openin 1 \tocreadfilename\space
+ \ifeof 1 \else
+ \readtocfile
+ \fi
+ \vfill \eject
+ \contentsalignmacro % in case @setchapternewpage odd is in effect
+ \ifeof 1 \else
+ \pdfmakeoutlines
+ \fi
+ \closein 1
+ \endgroup
+ \lastnegativepageno = \pageno
+ \global\pageno = \savepageno
+}
+
+% And just the chapters.
+\def\summarycontents{%
+ \startcontents{\putwordShortTOC}%
+ %
+ \let\numchapentry = \shortchapentry
+ \let\appentry = \shortchapentry
+ \let\unnchapentry = \shortunnchapentry
+ % We want a true roman here for the page numbers.
+ \secfonts
+ \let\rm=\shortcontrm \let\bf=\shortcontbf
+ \let\sl=\shortcontsl \let\tt=\shortconttt
+ \rm
+ \hyphenpenalty = 10000
+ \advance\baselineskip by 1pt % Open it up a little.
+ \def\numsecentry##1##2##3##4{}
+ \let\appsecentry = \numsecentry
+ \let\unnsecentry = \numsecentry
+ \let\numsubsecentry = \numsecentry
+ \let\appsubsecentry = \numsecentry
+ \let\unnsubsecentry = \numsecentry
+ \let\numsubsubsecentry = \numsecentry
+ \let\appsubsubsecentry = \numsecentry
+ \let\unnsubsubsecentry = \numsecentry
+ \openin 1 \tocreadfilename\space
+ \ifeof 1 \else
+ \readtocfile
+ \fi
+ \closein 1
+ \vfill \eject
+ \contentsalignmacro % in case @setchapternewpage odd is in effect
+ \endgroup
+ \lastnegativepageno = \pageno
+ \global\pageno = \savepageno
+}
+\let\shortcontents = \summarycontents
+
+% Typeset the label for a chapter or appendix for the short contents.
+% The arg is, e.g., `A' for an appendix, or `3' for a chapter.
+%
+\def\shortchaplabel#1{%
+ % This space should be enough, since a single number is .5em, and the
+ % widest letter (M) is 1em, at least in the Computer Modern fonts.
+ % But use \hss just in case.
+ % (This space doesn't include the extra space that gets added after
+ % the label; that gets put in by \shortchapentry above.)
+ %
+ % We'd like to right-justify chapter numbers, but that looks strange
+ % with appendix letters. And right-justifying numbers and
+ % left-justifying letters looks strange when there is less than 10
+ % chapters. Have to read the whole toc once to know how many chapters
+ % there are before deciding ...
+ \hbox to 1em{#1\hss}%
+}
+
+% These macros generate individual entries in the table of contents.
+% The first argument is the chapter or section name.
+% The last argument is the page number.
+% The arguments in between are the chapter number, section number, ...
+
+% Chapters, in the main contents.
+\def\numchapentry#1#2#3#4{\dochapentry{#2\labelspace#1}{#4}}
+%
+% Chapters, in the short toc.
+% See comments in \dochapentry re vbox and related settings.
+\def\shortchapentry#1#2#3#4{%
+ \tocentry{\shortchaplabel{#2}\labelspace #1}{\doshortpageno\bgroup#4\egroup}%
+}
+
+% Appendices, in the main contents.
+% Need the word Appendix, and a fixed-size box.
+%
+\def\appendixbox#1{%
+ % We use M since it's probably the widest letter.
+ \setbox0 = \hbox{\putwordAppendix{} M}%
+ \hbox to \wd0{\putwordAppendix{} #1\hss}}
+%
+\def\appentry#1#2#3#4{\dochapentry{\appendixbox{#2}\labelspace#1}{#4}}
+
+% Unnumbered chapters.
+\def\unnchapentry#1#2#3#4{\dochapentry{#1}{#4}}
+\def\shortunnchapentry#1#2#3#4{\tocentry{#1}{\doshortpageno\bgroup#4\egroup}}
+
+% Sections.
+\def\numsecentry#1#2#3#4{\dosecentry{#2\labelspace#1}{#4}}
+\let\appsecentry=\numsecentry
+\def\unnsecentry#1#2#3#4{\dosecentry{#1}{#4}}
+
+% Subsections.
+\def\numsubsecentry#1#2#3#4{\dosubsecentry{#2\labelspace#1}{#4}}
+\let\appsubsecentry=\numsubsecentry
+\def\unnsubsecentry#1#2#3#4{\dosubsecentry{#1}{#4}}
+
+% And subsubsections.
+\def\numsubsubsecentry#1#2#3#4{\dosubsubsecentry{#2\labelspace#1}{#4}}
+\let\appsubsubsecentry=\numsubsubsecentry
+\def\unnsubsubsecentry#1#2#3#4{\dosubsubsecentry{#1}{#4}}
+
+% This parameter controls the indentation of the various levels.
+% Same as \defaultparindent.
+\newdimen\tocindent \tocindent = 15pt
+
+% Now for the actual typesetting. In all these, #1 is the text and #2 is the
+% page number.
+%
+% If the toc has to be broken over pages, we want it to be at chapters
+% if at all possible; hence the \penalty.
+\def\dochapentry#1#2{%
+ \penalty-300 \vskip1\baselineskip plus.33\baselineskip minus.25\baselineskip
+ \begingroup
+ \chapentryfonts
+ \tocentry{#1}{\dopageno\bgroup#2\egroup}%
+ \endgroup
+ \nobreak\vskip .25\baselineskip plus.1\baselineskip
+}
+
+\def\dosecentry#1#2{\begingroup
+ \secentryfonts \leftskip=\tocindent
+ \tocentry{#1}{\dopageno\bgroup#2\egroup}%
+\endgroup}
+
+\def\dosubsecentry#1#2{\begingroup
+ \subsecentryfonts \leftskip=2\tocindent
+ \tocentry{#1}{\dopageno\bgroup#2\egroup}%
+\endgroup}
+
+\def\dosubsubsecentry#1#2{\begingroup
+ \subsubsecentryfonts \leftskip=3\tocindent
+ \tocentry{#1}{\dopageno\bgroup#2\egroup}%
+\endgroup}
+
+% We use the same \entry macro as for the index entries.
+\let\tocentry = \entry
+
+% Space between chapter (or whatever) number and the title.
+\def\labelspace{\hskip1em \relax}
+
+\def\dopageno#1{{\rm #1}}
+\def\doshortpageno#1{{\rm #1}}
+
+\def\chapentryfonts{\secfonts \rm}
+\def\secentryfonts{\textfonts}
+\def\subsecentryfonts{\textfonts}
+\def\subsubsecentryfonts{\textfonts}
+
+
+\message{environments,}
+% @foo ... @end foo.
+
+% @point{}, @result{}, @expansion{}, @print{}, @equiv{}.
+%
+% Since these characters are used in examples, it should be an even number of
+% \tt widths. Each \tt character is 1en, so two makes it 1em.
+%
+\def\point{$\star$}
+\def\result{\leavevmode\raise.15ex\hbox to 1em{\hfil$\Rightarrow$\hfil}}
+\def\expansion{\leavevmode\raise.1ex\hbox to 1em{\hfil$\mapsto$\hfil}}
+\def\print{\leavevmode\lower.1ex\hbox to 1em{\hfil$\dashv$\hfil}}
+\def\equiv{\leavevmode\lower.1ex\hbox to 1em{\hfil$\ptexequiv$\hfil}}
+
+% The @error{} command.
+% Adapted from the TeXbook's \boxit.
+%
+\newbox\errorbox
+%
+{\tentt \global\dimen0 = 3em}% Width of the box.
+\dimen2 = .55pt % Thickness of rules
+% The text. (`r' is open on the right, `e' somewhat less so on the left.)
+\setbox0 = \hbox{\kern-.75pt \reducedsf error\kern-1.5pt}
+%
+\setbox\errorbox=\hbox to \dimen0{\hfil
+ \hsize = \dimen0 \advance\hsize by -5.8pt % Space to left+right.
+ \advance\hsize by -2\dimen2 % Rules.
+ \vbox{%
+ \hrule height\dimen2
+ \hbox{\vrule width\dimen2 \kern3pt % Space to left of text.
+ \vtop{\kern2.4pt \box0 \kern2.4pt}% Space above/below.
+ \kern3pt\vrule width\dimen2}% Space to right.
+ \hrule height\dimen2}
+ \hfil}
+%
+\def\error{\leavevmode\lower.7ex\copy\errorbox}
+
+% @tex ... @end tex escapes into raw Tex temporarily.
+% One exception: @ is still an escape character, so that @end tex works.
+% But \@ or @@ will get a plain tex @ character.
+
+\envdef\tex{%
+ \catcode `\\=0 \catcode `\{=1 \catcode `\}=2
+ \catcode `\$=3 \catcode `\&=4 \catcode `\#=6
+ \catcode `\^=7 \catcode `\_=8 \catcode `\~=\active \let~=\tie
+ \catcode `\%=14
+ \catcode `\+=\other
+ \catcode `\"=\other
+ \catcode `\|=\other
+ \catcode `\<=\other
+ \catcode `\>=\other
+ \escapechar=`\\
+ %
+ \let\b=\ptexb
+ \let\bullet=\ptexbullet
+ \let\c=\ptexc
+ \let\,=\ptexcomma
+ \let\.=\ptexdot
+ \let\dots=\ptexdots
+ \let\equiv=\ptexequiv
+ \let\!=\ptexexclam
+ \let\i=\ptexi
+ \let\indent=\ptexindent
+ \let\noindent=\ptexnoindent
+ \let\{=\ptexlbrace
+ \let\+=\tabalign
+ \let\}=\ptexrbrace
+ \let\/=\ptexslash
+ \let\*=\ptexstar
+ \let\t=\ptext
+ \let\frenchspacing=\plainfrenchspacing
+ %
+ \def\endldots{\mathinner{\ldots\ldots\ldots\ldots}}%
+ \def\enddots{\relax\ifmmode\endldots\else$\mathsurround=0pt \endldots\,$\fi}%
+ \def\@{@}%
+}
+% There is no need to define \Etex.
+
+% Define @lisp ... @end lisp.
+% @lisp environment forms a group so it can rebind things,
+% including the definition of @end lisp (which normally is erroneous).
+
+% Amount to narrow the margins by for @lisp.
+\newskip\lispnarrowing \lispnarrowing=0.4in
+
+% This is the definition that ^^M gets inside @lisp, @example, and other
+% such environments. \null is better than a space, since it doesn't
+% have any width.
+\def\lisppar{\null\endgraf}
+
+% This space is always present above and below environments.
+\newskip\envskipamount \envskipamount = 0pt
+
+% Make spacing and below environment symmetrical. We use \parskip here
+% to help in doing that, since in @example-like environments \parskip
+% is reset to zero; thus the \afterenvbreak inserts no space -- but the
+% start of the next paragraph will insert \parskip.
+%
+\def\aboveenvbreak{{%
+ % =10000 instead of <10000 because of a special case in \itemzzz and
+ % \sectionheading, q.v.
+ \ifnum \lastpenalty=10000 \else
+ \advance\envskipamount by \parskip
+ \endgraf
+ \ifdim\lastskip<\envskipamount
+ \removelastskip
+ % it's not a good place to break if the last penalty was \nobreak
+ % or better ...
+ \ifnum\lastpenalty<10000 \penalty-50 \fi
+ \vskip\envskipamount
+ \fi
+ \fi
+}}
+
+\let\afterenvbreak = \aboveenvbreak
+
+% \nonarrowing is a flag. If "set", @lisp etc don't narrow margins; it will
+% also clear it, so that its embedded environments do the narrowing again.
+\let\nonarrowing=\relax
+
+% @cartouche ... @end cartouche: draw rectangle w/rounded corners around
+% environment contents.
+\font\circle=lcircle10
+\newdimen\circthick
+\newdimen\cartouter\newdimen\cartinner
+\newskip\normbskip\newskip\normpskip\newskip\normlskip
+\circthick=\fontdimen8\circle
+%
+\def\ctl{{\circle\char'013\hskip -6pt}}% 6pt from pl file: 1/2charwidth
+\def\ctr{{\hskip 6pt\circle\char'010}}
+\def\cbl{{\circle\char'012\hskip -6pt}}
+\def\cbr{{\hskip 6pt\circle\char'011}}
+\def\carttop{\hbox to \cartouter{\hskip\lskip
+ \ctl\leaders\hrule height\circthick\hfil\ctr
+ \hskip\rskip}}
+\def\cartbot{\hbox to \cartouter{\hskip\lskip
+ \cbl\leaders\hrule height\circthick\hfil\cbr
+ \hskip\rskip}}
+%
+\newskip\lskip\newskip\rskip
+
+\envdef\cartouche{%
+ \ifhmode\par\fi % can't be in the midst of a paragraph.
+ \startsavinginserts
+ \lskip=\leftskip \rskip=\rightskip
+ \leftskip=0pt\rightskip=0pt % we want these *outside*.
+ \cartinner=\hsize \advance\cartinner by-\lskip
+ \advance\cartinner by-\rskip
+ \cartouter=\hsize
+ \advance\cartouter by 18.4pt % allow for 3pt kerns on either
+ % side, and for 6pt waste from
+ % each corner char, and rule thickness
+ \normbskip=\baselineskip \normpskip=\parskip \normlskip=\lineskip
+ % Flag to tell @lisp, etc., not to narrow margin.
+ \let\nonarrowing = t%
+ \vbox\bgroup
+ \baselineskip=0pt\parskip=0pt\lineskip=0pt
+ \carttop
+ \hbox\bgroup
+ \hskip\lskip
+ \vrule\kern3pt
+ \vbox\bgroup
+ \kern3pt
+ \hsize=\cartinner
+ \baselineskip=\normbskip
+ \lineskip=\normlskip
+ \parskip=\normpskip
+ \vskip -\parskip
+ \comment % For explanation, see the end of \def\group.
+}
+\def\Ecartouche{%
+ \ifhmode\par\fi
+ \kern3pt
+ \egroup
+ \kern3pt\vrule
+ \hskip\rskip
+ \egroup
+ \cartbot
+ \egroup
+ \checkinserts
+}
+
+
+% This macro is called at the beginning of all the @example variants,
+% inside a group.
+\def\nonfillstart{%
+ \aboveenvbreak
+ \hfuzz = 12pt % Don't be fussy
+ \sepspaces % Make spaces be word-separators rather than space tokens.
+ \let\par = \lisppar % don't ignore blank lines
+ \obeylines % each line of input is a line of output
+ \parskip = 0pt
+ \parindent = 0pt
+ \emergencystretch = 0pt % don't try to avoid overfull boxes
+ \ifx\nonarrowing\relax
+ \advance \leftskip by \lispnarrowing
+ \exdentamount=\lispnarrowing
+ \else
+ \let\nonarrowing = \relax
+ \fi
+ \let\exdent=\nofillexdent
+}
+
+% If you want all examples etc. small: @set dispenvsize small.
+% If you want even small examples the full size: @set dispenvsize nosmall.
+% This affects the following displayed environments:
+% @example, @display, @format, @lisp
+%
+\def\smallword{small}
+\def\nosmallword{nosmall}
+\let\SETdispenvsize\relax
+\def\setnormaldispenv{%
+ \ifx\SETdispenvsize\smallword
+ % end paragraph for sake of leading, in case document has no blank
+ % line. This is redundant with what happens in \aboveenvbreak, but
+ % we need to do it before changing the fonts, and it's inconvenient
+ % to change the fonts afterward.
+ \ifnum \lastpenalty=10000 \else \endgraf \fi
+ \smallexamplefonts \rm
+ \fi
+}
+\def\setsmalldispenv{%
+ \ifx\SETdispenvsize\nosmallword
+ \else
+ \ifnum \lastpenalty=10000 \else \endgraf \fi
+ \smallexamplefonts \rm
+ \fi
+}
+
+% We often define two environments, @foo and @smallfoo.
+% Let's do it by one command:
+\def\makedispenv #1#2{
+ \expandafter\envdef\csname#1\endcsname {\setnormaldispenv #2}
+ \expandafter\envdef\csname small#1\endcsname {\setsmalldispenv #2}
+ \expandafter\let\csname E#1\endcsname \afterenvbreak
+ \expandafter\let\csname Esmall#1\endcsname \afterenvbreak
+}
+
+% Define two synonyms:
+\def\maketwodispenvs #1#2#3{
+ \makedispenv{#1}{#3}
+ \makedispenv{#2}{#3}
+}
+
+% @lisp: indented, narrowed, typewriter font; @example: same as @lisp.
+%
+% @smallexample and @smalllisp: use smaller fonts.
+% Originally contributed by Pavel@xerox.
+%
+\maketwodispenvs {lisp}{example}{%
+ \nonfillstart
+ \tt\quoteexpand
+ \let\kbdfont = \kbdexamplefont % Allow @kbd to do something special.
+ \gobble % eat return
+}
+% @display/@smalldisplay: same as @lisp except keep current font.
+%
+\makedispenv {display}{%
+ \nonfillstart
+ \gobble
+}
+
+% @format/@smallformat: same as @display except don't narrow margins.
+%
+\makedispenv{format}{%
+ \let\nonarrowing = t%
+ \nonfillstart
+ \gobble
+}
+
+% @flushleft: same as @format, but doesn't obey \SETdispenvsize.
+\envdef\flushleft{%
+ \let\nonarrowing = t%
+ \nonfillstart
+ \gobble
+}
+\let\Eflushleft = \afterenvbreak
+
+% @flushright.
+%
+\envdef\flushright{%
+ \let\nonarrowing = t%
+ \nonfillstart
+ \advance\leftskip by 0pt plus 1fill
+ \gobble
+}
+\let\Eflushright = \afterenvbreak
+
+
+% @quotation does normal linebreaking (hence we can't use \nonfillstart)
+% and narrows the margins. We keep \parskip nonzero in general, since
+% we're doing normal filling. So, when using \aboveenvbreak and
+% \afterenvbreak, temporarily make \parskip 0.
+%
+\envdef\quotation{%
+ {\parskip=0pt \aboveenvbreak}% because \aboveenvbreak inserts \parskip
+ \parindent=0pt
+ %
+ % @cartouche defines \nonarrowing to inhibit narrowing at next level down.
+ \ifx\nonarrowing\relax
+ \advance\leftskip by \lispnarrowing
+ \advance\rightskip by \lispnarrowing
+ \exdentamount = \lispnarrowing
+ \else
+ \let\nonarrowing = \relax
+ \fi
+ \parsearg\quotationlabel
+}
+
+% We have retained a nonzero parskip for the environment, since we're
+% doing normal filling.
+%
+\def\Equotation{%
+ \par
+ \ifx\quotationauthor\undefined\else
+ % indent a bit.
+ \leftline{\kern 2\leftskip \sl ---\quotationauthor}%
+ \fi
+ {\parskip=0pt \afterenvbreak}%
+}
+
+% If we're given an argument, typeset it in bold with a colon after.
+\def\quotationlabel#1{%
+ \def\temp{#1}%
+ \ifx\temp\empty \else
+ {\bf #1: }%
+ \fi
+}
+
+
+% LaTeX-like @verbatim...@end verbatim and @verb{<char>...<char>}
+% If we want to allow any <char> as delimiter,
+% we need the curly braces so that makeinfo sees the @verb command, eg:
+% `@verbx...x' would look like the '@verbx' command. --janneke@gnu.org
+%
+% [Knuth]: Donald Ervin Knuth, 1996. The TeXbook.
+%
+% [Knuth] p.344; only we need to do the other characters Texinfo sets
+% active too. Otherwise, they get lost as the first character on a
+% verbatim line.
+\def\dospecials{%
+ \do\ \do\\\do\{\do\}\do\$\do\&%
+ \do\#\do\^\do\^^K\do\_\do\^^A\do\%\do\~%
+ \do\<\do\>\do\|\do\@\do+\do\"%
+}
+%
+% [Knuth] p. 380
+\def\uncatcodespecials{%
+ \def\do##1{\catcode`##1=\other}\dospecials}
+%
+% [Knuth] pp. 380,381,391
+% Disable Spanish ligatures ?` and !` of \tt font
+\begingroup
+ \catcode`\`=\active\gdef`{\relax\lq}
+\endgroup
+%
+% Setup for the @verb command.
+%
+% Eight spaces for a tab
+\begingroup
+ \catcode`\^^I=\active
+ \gdef\tabeightspaces{\catcode`\^^I=\active\def^^I{\ \ \ \ \ \ \ \ }}
+\endgroup
+%
+\def\setupverb{%
+ \tt % easiest (and conventionally used) font for verbatim
+ \def\par{\leavevmode\endgraf}%
+ \catcode`\`=\active
+ \tabeightspaces
+ % Respect line breaks,
+ % print special symbols as themselves, and
+ % make each space count
+ % must do in this order:
+ \obeylines \uncatcodespecials \sepspaces
+}
+
+% Setup for the @verbatim environment
+%
+% Real tab expansion
+\newdimen\tabw \setbox0=\hbox{\tt\space} \tabw=8\wd0 % tab amount
+%
+\def\starttabbox{\setbox0=\hbox\bgroup}
+
+% Allow an option to not replace quotes with a regular directed right
+% quote/apostrophe (char 0x27), but instead use the undirected quote
+% from cmtt (char 0x0d). The undirected quote is ugly, so don't make it
+% the default, but it works for pasting with more pdf viewers (at least
+% evince), the lilypond developers report. xpdf does work with the
+% regular 0x27.
+%
+\def\codequoteright{%
+ \expandafter\ifx\csname SETtxicodequoteundirected\endcsname\relax
+ \expandafter\ifx\csname SETcodequoteundirected\endcsname\relax
+ '%
+ \else \char'15 \fi
+ \else \char'15 \fi
+}
+%
+% and a similar option for the left quote char vs. a grave accent.
+% Modern fonts display ASCII 0x60 as a grave accent, so some people like
+% the code environments to do likewise.
+%
+\def\codequoteleft{%
+ \expandafter\ifx\csname SETtxicodequotebacktick\endcsname\relax
+ \expandafter\ifx\csname SETcodequotebacktick\endcsname\relax
+ `%
+ \else \char'22 \fi
+ \else \char'22 \fi
+}
+%
+\begingroup
+ \catcode`\^^I=\active
+ \gdef\tabexpand{%
+ \catcode`\^^I=\active
+ \def^^I{\leavevmode\egroup
+ \dimen0=\wd0 % the width so far, or since the previous tab
+ \divide\dimen0 by\tabw
+ \multiply\dimen0 by\tabw % compute previous multiple of \tabw
+ \advance\dimen0 by\tabw % advance to next multiple of \tabw
+ \wd0=\dimen0 \box0 \starttabbox
+ }%
+ }
+ \catcode`\'=\active
+ \gdef\rquoteexpand{\catcode\rquoteChar=\active \def'{\codequoteright}}%
+ %
+ \catcode`\`=\active
+ \gdef\lquoteexpand{\catcode\lquoteChar=\active \def`{\codequoteleft}}%
+ %
+ \gdef\quoteexpand{\rquoteexpand \lquoteexpand}%
+\endgroup
+
+% start the verbatim environment.
+\def\setupverbatim{%
+ \let\nonarrowing = t%
+ \nonfillstart
+ % Easiest (and conventionally used) font for verbatim
+ \tt
+ \def\par{\leavevmode\egroup\box0\endgraf}%
+ \catcode`\`=\active
+ \tabexpand
+ \quoteexpand
+ % Respect line breaks,
+ % print special symbols as themselves, and
+ % make each space count
+ % must do in this order:
+ \obeylines \uncatcodespecials \sepspaces
+ \everypar{\starttabbox}%
+}
+
+% Do the @verb magic: verbatim text is quoted by unique
+% delimiter characters. Before first delimiter expect a
+% right brace, after last delimiter expect closing brace:
+%
+% \def\doverb'{'<char>#1<char>'}'{#1}
+%
+% [Knuth] p. 382; only eat outer {}
+\begingroup
+ \catcode`[=1\catcode`]=2\catcode`\{=\other\catcode`\}=\other
+ \gdef\doverb{#1[\def\next##1#1}[##1\endgroup]\next]
+\endgroup
+%
+\def\verb{\begingroup\setupverb\doverb}
+%
+%
+% Do the @verbatim magic: define the macro \doverbatim so that
+% the (first) argument ends when '@end verbatim' is reached, ie:
+%
+% \def\doverbatim#1@end verbatim{#1}
+%
+% For Texinfo it's a lot easier than for LaTeX,
+% because texinfo's \verbatim doesn't stop at '\end{verbatim}':
+% we need not redefine '\', '{' and '}'.
+%
+% Inspired by LaTeX's verbatim command set [latex.ltx]
+%
+\begingroup
+ \catcode`\ =\active
+ \obeylines %
+ % ignore everything up to the first ^^M, that's the newline at the end
+ % of the @verbatim input line itself. Otherwise we get an extra blank
+ % line in the output.
+ \xdef\doverbatim#1^^M#2@end verbatim{#2\noexpand\end\gobble verbatim}%
+ % We really want {...\end verbatim} in the body of the macro, but
+ % without the active space; thus we have to use \xdef and \gobble.
+\endgroup
+%
+\envdef\verbatim{%
+ \setupverbatim\doverbatim
+}
+\let\Everbatim = \afterenvbreak
+
+
+% @verbatiminclude FILE - insert text of file in verbatim environment.
+%
+\def\verbatiminclude{\parseargusing\filenamecatcodes\doverbatiminclude}
+%
+\def\doverbatiminclude#1{%
+ {%
+ \makevalueexpandable
+ \setupverbatim
+ \input #1
+ \afterenvbreak
+ }%
+}
+
+% @copying ... @end copying.
+% Save the text away for @insertcopying later.
+%
+% We save the uninterpreted tokens, rather than creating a box.
+% Saving the text in a box would be much easier, but then all the
+% typesetting commands (@smallbook, font changes, etc.) have to be done
+% beforehand -- and a) we want @copying to be done first in the source
+% file; b) letting users define the frontmatter in as flexible order as
+% possible is very desirable.
+%
+\def\copying{\checkenv{}\begingroup\scanargctxt\docopying}
+\def\docopying#1@end copying{\endgroup\def\copyingtext{#1}}
+%
+\def\insertcopying{%
+ \begingroup
+ \parindent = 0pt % paragraph indentation looks wrong on title page
+ \scanexp\copyingtext
+ \endgroup
+}
+
+
+\message{defuns,}
+% @defun etc.
+
+\newskip\defbodyindent \defbodyindent=.4in
+\newskip\defargsindent \defargsindent=50pt
+\newskip\deflastargmargin \deflastargmargin=18pt
+\newcount\defunpenalty
+
+% Start the processing of @deffn:
+\def\startdefun{%
+ \ifnum\lastpenalty<10000
+ \medbreak
+ \defunpenalty=10003 % Will keep this @deffn together with the
+ % following @def command, see below.
+ \else
+ % If there are two @def commands in a row, we'll have a \nobreak,
+ % which is there to keep the function description together with its
+ % header. But if there's nothing but headers, we need to allow a
+ % break somewhere. Check specifically for penalty 10002, inserted
+ % by \printdefunline, instead of 10000, since the sectioning
+ % commands also insert a nobreak penalty, and we don't want to allow
+ % a break between a section heading and a defun.
+ %
+ % As a minor refinement, we avoid "club" headers by signalling
+ % with penalty of 10003 after the very first @deffn in the
+ % sequence (see above), and penalty of 10002 after any following
+ % @def command.
+ \ifnum\lastpenalty=10002 \penalty2000 \else \defunpenalty=10002 \fi
+ %
+ % Similarly, after a section heading, do not allow a break.
+ % But do insert the glue.
+ \medskip % preceded by discardable penalty, so not a breakpoint
+ \fi
+ %
+ \parindent=0in
+ \advance\leftskip by \defbodyindent
+ \exdentamount=\defbodyindent
+}
+
+\def\dodefunx#1{%
+ % First, check whether we are in the right environment:
+ \checkenv#1%
+ %
+ % As above, allow line break if we have multiple x headers in a row.
+ % It's not a great place, though.
+ \ifnum\lastpenalty=10002 \penalty3000 \else \defunpenalty=10002 \fi
+ %
+ % And now, it's time to reuse the body of the original defun:
+ \expandafter\gobbledefun#1%
+}
+\def\gobbledefun#1\startdefun{}
+
+% \printdefunline \deffnheader{text}
+%
+\def\printdefunline#1#2{%
+ \begingroup
+ % call \deffnheader:
+ #1#2 \endheader
+ % common ending:
+ \interlinepenalty = 10000
+ \advance\rightskip by 0pt plus 1fil
+ \endgraf
+ \nobreak\vskip -\parskip
+ \penalty\defunpenalty % signal to \startdefun and \dodefunx
+ % Some of the @defun-type tags do not enable magic parentheses,
+ % rendering the following check redundant. But we don't optimize.
+ \checkparencounts
+ \endgroup
+}
+
+\def\Edefun{\endgraf\medbreak}
+
+% \makedefun{deffn} creates \deffn, \deffnx and \Edeffn;
+% the only thing remainnig is to define \deffnheader.
+%
+\def\makedefun#1{%
+ \expandafter\let\csname E#1\endcsname = \Edefun
+ \edef\temp{\noexpand\domakedefun
+ \makecsname{#1}\makecsname{#1x}\makecsname{#1header}}%
+ \temp
+}
+
+% \domakedefun \deffn \deffnx \deffnheader
+%
+% Define \deffn and \deffnx, without parameters.
+% \deffnheader has to be defined explicitly.
+%
+\def\domakedefun#1#2#3{%
+ \envdef#1{%
+ \startdefun
+ \parseargusing\activeparens{\printdefunline#3}%
+ }%
+ \def#2{\dodefunx#1}%
+ \def#3%
+}
+
+%%% Untyped functions:
+
+% @deffn category name args
+\makedefun{deffn}{\deffngeneral{}}
+
+% @deffn category class name args
+\makedefun{defop}#1 {\defopon{#1\ \putwordon}}
+
+% \defopon {category on}class name args
+\def\defopon#1#2 {\deffngeneral{\putwordon\ \code{#2}}{#1\ \code{#2}} }
+
+% \deffngeneral {subind}category name args
+%
+\def\deffngeneral#1#2 #3 #4\endheader{%
+ % Remember that \dosubind{fn}{foo}{} is equivalent to \doind{fn}{foo}.
+ \dosubind{fn}{\code{#3}}{#1}%
+ \defname{#2}{}{#3}\magicamp\defunargs{#4\unskip}%
+}
+
+%%% Typed functions:
+
+% @deftypefn category type name args
+\makedefun{deftypefn}{\deftypefngeneral{}}
+
+% @deftypeop category class type name args
+\makedefun{deftypeop}#1 {\deftypeopon{#1\ \putwordon}}
+
+% \deftypeopon {category on}class type name args
+\def\deftypeopon#1#2 {\deftypefngeneral{\putwordon\ \code{#2}}{#1\ \code{#2}} }
+
+% \deftypefngeneral {subind}category type name args
+%
+\def\deftypefngeneral#1#2 #3 #4 #5\endheader{%
+ \dosubind{fn}{\code{#4}}{#1}%
+ \defname{#2}{#3}{#4}\defunargs{#5\unskip}%
+}
+
+%%% Typed variables:
+
+% @deftypevr category type var args
+\makedefun{deftypevr}{\deftypecvgeneral{}}
+
+% @deftypecv category class type var args
+\makedefun{deftypecv}#1 {\deftypecvof{#1\ \putwordof}}
+
+% \deftypecvof {category of}class type var args
+\def\deftypecvof#1#2 {\deftypecvgeneral{\putwordof\ \code{#2}}{#1\ \code{#2}} }
+
+% \deftypecvgeneral {subind}category type var args
+%
+\def\deftypecvgeneral#1#2 #3 #4 #5\endheader{%
+ \dosubind{vr}{\code{#4}}{#1}%
+ \defname{#2}{#3}{#4}\defunargs{#5\unskip}%
+}
+
+%%% Untyped variables:
+
+% @defvr category var args
+\makedefun{defvr}#1 {\deftypevrheader{#1} {} }
+
+% @defcv category class var args
+\makedefun{defcv}#1 {\defcvof{#1\ \putwordof}}
+
+% \defcvof {category of}class var args
+\def\defcvof#1#2 {\deftypecvof{#1}#2 {} }
+
+%%% Type:
+% @deftp category name args
+\makedefun{deftp}#1 #2 #3\endheader{%
+ \doind{tp}{\code{#2}}%
+ \defname{#1}{}{#2}\defunargs{#3\unskip}%
+}
+
+% Remaining @defun-like shortcuts:
+\makedefun{defun}{\deffnheader{\putwordDeffunc} }
+\makedefun{defmac}{\deffnheader{\putwordDefmac} }
+\makedefun{defspec}{\deffnheader{\putwordDefspec} }
+\makedefun{deftypefun}{\deftypefnheader{\putwordDeffunc} }
+\makedefun{defvar}{\defvrheader{\putwordDefvar} }
+\makedefun{defopt}{\defvrheader{\putwordDefopt} }
+\makedefun{deftypevar}{\deftypevrheader{\putwordDefvar} }
+\makedefun{defmethod}{\defopon\putwordMethodon}
+\makedefun{deftypemethod}{\deftypeopon\putwordMethodon}
+\makedefun{defivar}{\defcvof\putwordInstanceVariableof}
+\makedefun{deftypeivar}{\deftypecvof\putwordInstanceVariableof}
+
+% \defname, which formats the name of the @def (not the args).
+% #1 is the category, such as "Function".
+% #2 is the return type, if any.
+% #3 is the function name.
+%
+% We are followed by (but not passed) the arguments, if any.
+%
+\def\defname#1#2#3{%
+ % Get the values of \leftskip and \rightskip as they were outside the @def...
+ \advance\leftskip by -\defbodyindent
+ %
+ % How we'll format the type name. Putting it in brackets helps
+ % distinguish it from the body text that may end up on the next line
+ % just below it.
+ \def\temp{#1}%
+ \setbox0=\hbox{\kern\deflastargmargin \ifx\temp\empty\else [\rm\temp]\fi}
+ %
+ % Figure out line sizes for the paragraph shape.
+ % The first line needs space for \box0; but if \rightskip is nonzero,
+ % we need only space for the part of \box0 which exceeds it:
+ \dimen0=\hsize \advance\dimen0 by -\wd0 \advance\dimen0 by \rightskip
+ % The continuations:
+ \dimen2=\hsize \advance\dimen2 by -\defargsindent
+ % (plain.tex says that \dimen1 should be used only as global.)
+ \parshape 2 0in \dimen0 \defargsindent \dimen2
+ %
+ % Put the type name to the right margin.
+ \noindent
+ \hbox to 0pt{%
+ \hfil\box0 \kern-\hsize
+ % \hsize has to be shortened this way:
+ \kern\leftskip
+ % Intentionally do not respect \rightskip, since we need the space.
+ }%
+ %
+ % Allow all lines to be underfull without complaint:
+ \tolerance=10000 \hbadness=10000
+ \exdentamount=\defbodyindent
+ {%
+ % defun fonts. We use typewriter by default (used to be bold) because:
+ % . we're printing identifiers, they should be in tt in principle.
+ % . in languages with many accents, such as Czech or French, it's
+ % common to leave accents off identifiers. The result looks ok in
+ % tt, but exceedingly strange in rm.
+ % . we don't want -- and --- to be treated as ligatures.
+ % . this still does not fix the ?` and !` ligatures, but so far no
+ % one has made identifiers using them :).
+ \df \tt
+ \def\temp{#2}% return value type
+ \ifx\temp\empty\else \tclose{\temp} \fi
+ #3% output function name
+ }%
+ {\rm\enskip}% hskip 0.5 em of \tenrm
+ %
+ \boldbrax
+ % arguments will be output next, if any.
+}
+
+% Print arguments in slanted roman (not ttsl), inconsistently with using
+% tt for the name. This is because literal text is sometimes needed in
+% the argument list (groff manual), and ttsl and tt are not very
+% distinguishable. Prevent hyphenation at `-' chars.
+%
+\def\defunargs#1{%
+ % use sl by default (not ttsl),
+ % tt for the names.
+ \df \sl \hyphenchar\font=0
+ %
+ % On the other hand, if an argument has two dashes (for instance), we
+ % want a way to get ttsl. Let's try @var for that.
+ \let\var=\ttslanted
+ #1%
+ \sl\hyphenchar\font=45
+}
+
+% We want ()&[] to print specially on the defun line.
+%
+\def\activeparens{%
+ \catcode`\(=\active \catcode`\)=\active
+ \catcode`\[=\active \catcode`\]=\active
+ \catcode`\&=\active
+}
+
+% Make control sequences which act like normal parenthesis chars.
+\let\lparen = ( \let\rparen = )
+
+% Be sure that we always have a definition for `(', etc. For example,
+% if the fn name has parens in it, \boldbrax will not be in effect yet,
+% so TeX would otherwise complain about undefined control sequence.
+{
+ \activeparens
+ \global\let(=\lparen \global\let)=\rparen
+ \global\let[=\lbrack \global\let]=\rbrack
+ \global\let& = \&
+
+ \gdef\boldbrax{\let(=\opnr\let)=\clnr\let[=\lbrb\let]=\rbrb}
+ \gdef\magicamp{\let&=\amprm}
+}
+
+\newcount\parencount
+
+% If we encounter &foo, then turn on ()-hacking afterwards
+\newif\ifampseen
+\def\amprm#1 {\ampseentrue{\bf\&#1 }}
+
+\def\parenfont{%
+ \ifampseen
+ % At the first level, print parens in roman,
+ % otherwise use the default font.
+ \ifnum \parencount=1 \rm \fi
+ \else
+ % The \sf parens (in \boldbrax) actually are a little bolder than
+ % the contained text. This is especially needed for [ and ] .
+ \sf
+ \fi
+}
+\def\infirstlevel#1{%
+ \ifampseen
+ \ifnum\parencount=1
+ #1%
+ \fi
+ \fi
+}
+\def\bfafterword#1 {#1 \bf}
+
+\def\opnr{%
+ \global\advance\parencount by 1
+ {\parenfont(}%
+ \infirstlevel \bfafterword
+}
+\def\clnr{%
+ {\parenfont)}%
+ \infirstlevel \sl
+ \global\advance\parencount by -1
+}
+
+\newcount\brackcount
+\def\lbrb{%
+ \global\advance\brackcount by 1
+ {\bf[}%
+}
+\def\rbrb{%
+ {\bf]}%
+ \global\advance\brackcount by -1
+}
+
+\def\checkparencounts{%
+ \ifnum\parencount=0 \else \badparencount \fi
+ \ifnum\brackcount=0 \else \badbrackcount \fi
+}
+% these should not use \errmessage; the glibc manual, at least, actually
+% has such constructs (when documenting function pointers).
+\def\badparencount{%
+ \message{Warning: unbalanced parentheses in @def...}%
+ \global\parencount=0
+}
+\def\badbrackcount{%
+ \message{Warning: unbalanced square brackets in @def...}%
+ \global\brackcount=0
+}
+
+
+\message{macros,}
+% @macro.
+
+% To do this right we need a feature of e-TeX, \scantokens,
+% which we arrange to emulate with a temporary file in ordinary TeX.
+\ifx\eTeXversion\undefined
+ \newwrite\macscribble
+ \def\scantokens#1{%
+ \toks0={#1}%
+ \immediate\openout\macscribble=\jobname.tmp
+ \immediate\write\macscribble{\the\toks0}%
+ \immediate\closeout\macscribble
+ \input \jobname.tmp
+ }
+\fi
+
+\def\scanmacro#1{%
+ \begingroup
+ \newlinechar`\^^M
+ \let\xeatspaces\eatspaces
+ % Undo catcode changes of \startcontents and \doprintindex
+ % When called from @insertcopying or (short)caption, we need active
+ % backslash to get it printed correctly. Previously, we had
+ % \catcode`\\=\other instead. We'll see whether a problem appears
+ % with macro expansion. --kasal, 19aug04
+ \catcode`\@=0 \catcode`\\=\active \escapechar=`\@
+ % ... and \example
+ \spaceisspace
+ %
+ % Append \endinput to make sure that TeX does not see the ending newline.
+ % I've verified that it is necessary both for e-TeX and for ordinary TeX
+ % --kasal, 29nov03
+ \scantokens{#1\endinput}%
+ \endgroup
+}
+
+\def\scanexp#1{%
+ \edef\temp{\noexpand\scanmacro{#1}}%
+ \temp
+}
+
+\newcount\paramno % Count of parameters
+\newtoks\macname % Macro name
+\newif\ifrecursive % Is it recursive?
+
+% List of all defined macros in the form
+% \definedummyword\macro1\definedummyword\macro2...
+% Currently is also contains all @aliases; the list can be split
+% if there is a need.
+\def\macrolist{}
+
+% Add the macro to \macrolist
+\def\addtomacrolist#1{\expandafter \addtomacrolistxxx \csname#1\endcsname}
+\def\addtomacrolistxxx#1{%
+ \toks0 = \expandafter{\macrolist\definedummyword#1}%
+ \xdef\macrolist{\the\toks0}%
+}
+
+% Utility routines.
+% This does \let #1 = #2, with \csnames; that is,
+% \let \csname#1\endcsname = \csname#2\endcsname
+% (except of course we have to play expansion games).
+%
+\def\cslet#1#2{%
+ \expandafter\let
+ \csname#1\expandafter\endcsname
+ \csname#2\endcsname
+}
+
+% Trim leading and trailing spaces off a string.
+% Concepts from aro-bend problem 15 (see CTAN).
+{\catcode`\@=11
+\gdef\eatspaces #1{\expandafter\trim@\expandafter{#1 }}
+\gdef\trim@ #1{\trim@@ @#1 @ #1 @ @@}
+\gdef\trim@@ #1@ #2@ #3@@{\trim@@@\empty #2 @}
+\def\unbrace#1{#1}
+\unbrace{\gdef\trim@@@ #1 } #2@{#1}
+}
+
+% Trim a single trailing ^^M off a string.
+{\catcode`\^^M=\other \catcode`\Q=3%
+\gdef\eatcr #1{\eatcra #1Q^^MQ}%
+\gdef\eatcra#1^^MQ{\eatcrb#1Q}%
+\gdef\eatcrb#1Q#2Q{#1}%
+}
+
+% Macro bodies are absorbed as an argument in a context where
+% all characters are catcode 10, 11 or 12, except \ which is active
+% (as in normal texinfo). It is necessary to change the definition of \.
+
+% Non-ASCII encodings make 8-bit characters active, so un-activate
+% them to avoid their expansion. Must do this non-globally, to
+% confine the change to the current group.
+
+% It's necessary to have hard CRs when the macro is executed. This is
+% done by making ^^M (\endlinechar) catcode 12 when reading the macro
+% body, and then making it the \newlinechar in \scanmacro.
+
+\def\scanctxt{%
+ \catcode`\"=\other
+ \catcode`\+=\other
+ \catcode`\<=\other
+ \catcode`\>=\other
+ \catcode`\@=\other
+ \catcode`\^=\other
+ \catcode`\_=\other
+ \catcode`\|=\other
+ \catcode`\~=\other
+ \ifx\declaredencoding\ascii \else \setnonasciicharscatcodenonglobal\other \fi
+}
+
+\def\scanargctxt{%
+ \scanctxt
+ \catcode`\\=\other
+ \catcode`\^^M=\other
+}
+
+\def\macrobodyctxt{%
+ \scanctxt
+ \catcode`\{=\other
+ \catcode`\}=\other
+ \catcode`\^^M=\other
+ \usembodybackslash
+}
+
+\def\macroargctxt{%
+ \scanctxt
+ \catcode`\\=\other
+}
+
+% \mbodybackslash is the definition of \ in @macro bodies.
+% It maps \foo\ => \csname macarg.foo\endcsname => #N
+% where N is the macro parameter number.
+% We define \csname macarg.\endcsname to be \realbackslash, so
+% \\ in macro replacement text gets you a backslash.
+
+{\catcode`@=0 @catcode`@\=@active
+ @gdef@usembodybackslash{@let\=@mbodybackslash}
+ @gdef@mbodybackslash#1\{@csname macarg.#1@endcsname}
+}
+\expandafter\def\csname macarg.\endcsname{\realbackslash}
+
+\def\macro{\recursivefalse\parsearg\macroxxx}
+\def\rmacro{\recursivetrue\parsearg\macroxxx}
+
+\def\macroxxx#1{%
+ \getargs{#1}% now \macname is the macname and \argl the arglist
+ \ifx\argl\empty % no arguments
+ \paramno=0%
+ \else
+ \expandafter\parsemargdef \argl;%
+ \fi
+ \if1\csname ismacro.\the\macname\endcsname
+ \message{Warning: redefining \the\macname}%
+ \else
+ \expandafter\ifx\csname \the\macname\endcsname \relax
+ \else \errmessage{Macro name \the\macname\space already defined}\fi
+ \global\cslet{macsave.\the\macname}{\the\macname}%
+ \global\expandafter\let\csname ismacro.\the\macname\endcsname=1%
+ \addtomacrolist{\the\macname}%
+ \fi
+ \begingroup \macrobodyctxt
+ \ifrecursive \expandafter\parsermacbody
+ \else \expandafter\parsemacbody
+ \fi}
+
+\parseargdef\unmacro{%
+ \if1\csname ismacro.#1\endcsname
+ \global\cslet{#1}{macsave.#1}%
+ \global\expandafter\let \csname ismacro.#1\endcsname=0%
+ % Remove the macro name from \macrolist:
+ \begingroup
+ \expandafter\let\csname#1\endcsname \relax
+ \let\definedummyword\unmacrodo
+ \xdef\macrolist{\macrolist}%
+ \endgroup
+ \else
+ \errmessage{Macro #1 not defined}%
+ \fi
+}
+
+% Called by \do from \dounmacro on each macro. The idea is to omit any
+% macro definitions that have been changed to \relax.
+%
+\def\unmacrodo#1{%
+ \ifx #1\relax
+ % remove this
+ \else
+ \noexpand\definedummyword \noexpand#1%
+ \fi
+}
+
+% This makes use of the obscure feature that if the last token of a
+% <parameter list> is #, then the preceding argument is delimited by
+% an opening brace, and that opening brace is not consumed.
+\def\getargs#1{\getargsxxx#1{}}
+\def\getargsxxx#1#{\getmacname #1 \relax\getmacargs}
+\def\getmacname #1 #2\relax{\macname={#1}}
+\def\getmacargs#1{\def\argl{#1}}
+
+% Parse the optional {params} list. Set up \paramno and \paramlist
+% so \defmacro knows what to do. Define \macarg.blah for each blah
+% in the params list, to be ##N where N is the position in that list.
+% That gets used by \mbodybackslash (above).
+
+% We need to get `macro parameter char #' into several definitions.
+% The technique used is stolen from LaTeX: let \hash be something
+% unexpandable, insert that wherever you need a #, and then redefine
+% it to # just before using the token list produced.
+%
+% The same technique is used to protect \eatspaces till just before
+% the macro is used.
+
+\def\parsemargdef#1;{\paramno=0\def\paramlist{}%
+ \let\hash\relax\let\xeatspaces\relax\parsemargdefxxx#1,;,}
+\def\parsemargdefxxx#1,{%
+ \if#1;\let\next=\relax
+ \else \let\next=\parsemargdefxxx
+ \advance\paramno by 1%
+ \expandafter\edef\csname macarg.\eatspaces{#1}\endcsname
+ {\xeatspaces{\hash\the\paramno}}%
+ \edef\paramlist{\paramlist\hash\the\paramno,}%
+ \fi\next}
+
+% These two commands read recursive and nonrecursive macro bodies.
+% (They're different since rec and nonrec macros end differently.)
+
+\long\def\parsemacbody#1@end macro%
+{\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
+\long\def\parsermacbody#1@end rmacro%
+{\xdef\temp{\eatcr{#1}}\endgroup\defmacro}%
+
+% This defines the macro itself. There are six cases: recursive and
+% nonrecursive macros of zero, one, and many arguments.
+% Much magic with \expandafter here.
+% \xdef is used so that macro definitions will survive the file
+% they're defined in; @include reads the file inside a group.
+\def\defmacro{%
+ \let\hash=##% convert placeholders to macro parameter chars
+ \ifrecursive
+ \ifcase\paramno
+ % 0
+ \expandafter\xdef\csname\the\macname\endcsname{%
+ \noexpand\scanmacro{\temp}}%
+ \or % 1
+ \expandafter\xdef\csname\the\macname\endcsname{%
+ \bgroup\noexpand\macroargctxt
+ \noexpand\braceorline
+ \expandafter\noexpand\csname\the\macname xxx\endcsname}%
+ \expandafter\xdef\csname\the\macname xxx\endcsname##1{%
+ \egroup\noexpand\scanmacro{\temp}}%
+ \else % many
+ \expandafter\xdef\csname\the\macname\endcsname{%
+ \bgroup\noexpand\macroargctxt
+ \noexpand\csname\the\macname xx\endcsname}%
+ \expandafter\xdef\csname\the\macname xx\endcsname##1{%
+ \expandafter\noexpand\csname\the\macname xxx\endcsname ##1,}%
+ \expandafter\expandafter
+ \expandafter\xdef
+ \expandafter\expandafter
+ \csname\the\macname xxx\endcsname
+ \paramlist{\egroup\noexpand\scanmacro{\temp}}%
+ \fi
+ \else
+ \ifcase\paramno
+ % 0
+ \expandafter\xdef\csname\the\macname\endcsname{%
+ \noexpand\norecurse{\the\macname}%
+ \noexpand\scanmacro{\temp}\egroup}%
+ \or % 1
+ \expandafter\xdef\csname\the\macname\endcsname{%
+ \bgroup\noexpand\macroargctxt
+ \noexpand\braceorline
+ \expandafter\noexpand\csname\the\macname xxx\endcsname}%
+ \expandafter\xdef\csname\the\macname xxx\endcsname##1{%
+ \egroup
+ \noexpand\norecurse{\the\macname}%
+ \noexpand\scanmacro{\temp}\egroup}%
+ \else % many
+ \expandafter\xdef\csname\the\macname\endcsname{%
+ \bgroup\noexpand\macroargctxt
+ \expandafter\noexpand\csname\the\macname xx\endcsname}%
+ \expandafter\xdef\csname\the\macname xx\endcsname##1{%
+ \expandafter\noexpand\csname\the\macname xxx\endcsname ##1,}%
+ \expandafter\expandafter
+ \expandafter\xdef
+ \expandafter\expandafter
+ \csname\the\macname xxx\endcsname
+ \paramlist{%
+ \egroup
+ \noexpand\norecurse{\the\macname}%
+ \noexpand\scanmacro{\temp}\egroup}%
+ \fi
+ \fi}
+
+\def\norecurse#1{\bgroup\cslet{#1}{macsave.#1}}
+
+% \braceorline decides whether the next nonwhitespace character is a
+% {. If so it reads up to the closing }, if not, it reads the whole
+% line. Whatever was read is then fed to the next control sequence
+% as an argument (by \parsebrace or \parsearg)
+\def\braceorline#1{\let\macnamexxx=#1\futurelet\nchar\braceorlinexxx}
+\def\braceorlinexxx{%
+ \ifx\nchar\bgroup\else
+ \expandafter\parsearg
+ \fi \macnamexxx}
+
+
+% @alias.
+% We need some trickery to remove the optional spaces around the equal
+% sign. Just make them active and then expand them all to nothing.
+\def\alias{\parseargusing\obeyspaces\aliasxxx}
+\def\aliasxxx #1{\aliasyyy#1\relax}
+\def\aliasyyy #1=#2\relax{%
+ {%
+ \expandafter\let\obeyedspace=\empty
+ \addtomacrolist{#1}%
+ \xdef\next{\global\let\makecsname{#1}=\makecsname{#2}}%
+ }%
+ \next
+}
+
+
+\message{cross references,}
+
+\newwrite\auxfile
+\newif\ifhavexrefs % True if xref values are known.
+\newif\ifwarnedxrefs % True if we warned once that they aren't known.
+
+% @inforef is relatively simple.
+\def\inforef #1{\inforefzzz #1,,,,**}
+\def\inforefzzz #1,#2,#3,#4**{\putwordSee{} \putwordInfo{} \putwordfile{} \file{\ignorespaces #3{}},
+ node \samp{\ignorespaces#1{}}}
+
+% @node's only job in TeX is to define \lastnode, which is used in
+% cross-references. The @node line might or might not have commas, and
+% might or might not have spaces before the first comma, like:
+% @node foo , bar , ...
+% We don't want such trailing spaces in the node name.
+%
+\parseargdef\node{\checkenv{}\donode #1 ,\finishnodeparse}
+%
+% also remove a trailing comma, in case of something like this:
+% @node Help-Cross, , , Cross-refs
+\def\donode#1 ,#2\finishnodeparse{\dodonode #1,\finishnodeparse}
+\def\dodonode#1,#2\finishnodeparse{\gdef\lastnode{#1}}
+
+\let\nwnode=\node
+\let\lastnode=\empty
+
+% Write a cross-reference definition for the current node. #1 is the
+% type (Ynumbered, Yappendix, Ynothing).
+%
+\def\donoderef#1{%
+ \ifx\lastnode\empty\else
+ \setref{\lastnode}{#1}%
+ \global\let\lastnode=\empty
+ \fi
+}
+
+% @anchor{NAME} -- define xref target at arbitrary point.
+%
+\newcount\savesfregister
+%
+\def\savesf{\relax \ifhmode \savesfregister=\spacefactor \fi}
+\def\restoresf{\relax \ifhmode \spacefactor=\savesfregister \fi}
+\def\anchor#1{\savesf \setref{#1}{Ynothing}\restoresf \ignorespaces}
+
+% \setref{NAME}{SNT} defines a cross-reference point NAME (a node or an
+% anchor), which consists of three parts:
+% 1) NAME-title - the current sectioning name taken from \lastsection,
+% or the anchor name.
+% 2) NAME-snt - section number and type, passed as the SNT arg, or
+% empty for anchors.
+% 3) NAME-pg - the page number.
+%
+% This is called from \donoderef, \anchor, and \dofloat. In the case of
+% floats, there is an additional part, which is not written here:
+% 4) NAME-lof - the text as it should appear in a @listoffloats.
+%
+\def\setref#1#2{%
+ \pdfmkdest{#1}%
+ \iflinks
+ {%
+ \atdummies % preserve commands, but don't expand them
+ \edef\writexrdef##1##2{%
+ \write\auxfile{@xrdef{#1-% #1 of \setref, expanded by the \edef
+ ##1}{##2}}% these are parameters of \writexrdef
+ }%
+ \toks0 = \expandafter{\lastsection}%
+ \immediate \writexrdef{title}{\the\toks0 }%
+ \immediate \writexrdef{snt}{\csname #2\endcsname}% \Ynumbered etc.
+ \safewhatsit{\writexrdef{pg}{\folio}}% will be written later, during \shipout
+ }%
+ \fi
+}
+
+% @xref, @pxref, and @ref generate cross-references. For \xrefX, #1 is
+% the node name, #2 the name of the Info cross-reference, #3 the printed
+% node name, #4 the name of the Info file, #5 the name of the printed
+% manual. All but the node name can be omitted.
+%
+\def\pxref#1{\putwordsee{} \xrefX[#1,,,,,,,]}
+\def\xref#1{\putwordSee{} \xrefX[#1,,,,,,,]}
+\def\ref#1{\xrefX[#1,,,,,,,]}
+\def\xrefX[#1,#2,#3,#4,#5,#6]{\begingroup
+ \unsepspaces
+ \def\printedmanual{\ignorespaces #5}%
+ \def\printedrefname{\ignorespaces #3}%
+ \setbox1=\hbox{\printedmanual\unskip}%
+ \setbox0=\hbox{\printedrefname\unskip}%
+ \ifdim \wd0 = 0pt
+ % No printed node name was explicitly given.
+ \expandafter\ifx\csname SETxref-automatic-section-title\endcsname\relax
+ % Use the node name inside the square brackets.
+ \def\printedrefname{\ignorespaces #1}%
+ \else
+ % Use the actual chapter/section title appear inside
+ % the square brackets. Use the real section title if we have it.
+ \ifdim \wd1 > 0pt
+ % It is in another manual, so we don't have it.
+ \def\printedrefname{\ignorespaces #1}%
+ \else
+ \ifhavexrefs
+ % We know the real title if we have the xref values.
+ \def\printedrefname{\refx{#1-title}{}}%
+ \else
+ % Otherwise just copy the Info node name.
+ \def\printedrefname{\ignorespaces #1}%
+ \fi%
+ \fi
+ \fi
+ \fi
+ %
+ % Make link in pdf output.
+ \ifpdf
+ \leavevmode
+ \getfilename{#4}%
+ {\indexnofonts
+ \turnoffactive
+ % See comments at \activebackslashdouble.
+ {\activebackslashdouble \xdef\pdfxrefdest{#1}%
+ \backslashparens\pdfxrefdest}%
+ %
+ \ifnum\filenamelength>0
+ \startlink attr{/Border [0 0 0]}%
+ goto file{\the\filename.pdf} name{\pdfxrefdest}%
+ \else
+ \startlink attr{/Border [0 0 0]}%
+ goto name{\pdfmkpgn{\pdfxrefdest}}%
+ \fi
+ }%
+ \setcolor{\linkcolor}%
+ \fi
+ %
+ % Float references are printed completely differently: "Figure 1.2"
+ % instead of "[somenode], p.3". We distinguish them by the
+ % LABEL-title being set to a magic string.
+ {%
+ % Have to otherify everything special to allow the \csname to
+ % include an _ in the xref name, etc.
+ \indexnofonts
+ \turnoffactive
+ \expandafter\global\expandafter\let\expandafter\Xthisreftitle
+ \csname XR#1-title\endcsname
+ }%
+ \iffloat\Xthisreftitle
+ % If the user specified the print name (third arg) to the ref,
+ % print it instead of our usual "Figure 1.2".
+ \ifdim\wd0 = 0pt
+ \refx{#1-snt}{}%
+ \else
+ \printedrefname
+ \fi
+ %
+ % if the user also gave the printed manual name (fifth arg), append
+ % "in MANUALNAME".
+ \ifdim \wd1 > 0pt
+ \space \putwordin{} \cite{\printedmanual}%
+ \fi
+ \else
+ % node/anchor (non-float) references.
+ %
+ % If we use \unhbox0 and \unhbox1 to print the node names, TeX does not
+ % insert empty discretionaries after hyphens, which means that it will
+ % not find a line break at a hyphen in a node names. Since some manuals
+ % are best written with fairly long node names, containing hyphens, this
+ % is a loss. Therefore, we give the text of the node name again, so it
+ % is as if TeX is seeing it for the first time.
+ \ifdim \wd1 > 0pt
+ \putwordSection{} ``\printedrefname'' \putwordin{} \cite{\printedmanual}%
+ \else
+ % _ (for example) has to be the character _ for the purposes of the
+ % control sequence corresponding to the node, but it has to expand
+ % into the usual \leavevmode...\vrule stuff for purposes of
+ % printing. So we \turnoffactive for the \refx-snt, back on for the
+ % printing, back off for the \refx-pg.
+ {\turnoffactive
+ % Only output a following space if the -snt ref is nonempty; for
+ % @unnumbered and @anchor, it won't be.
+ \setbox2 = \hbox{\ignorespaces \refx{#1-snt}{}}%
+ \ifdim \wd2 > 0pt \refx{#1-snt}\space\fi
+ }%
+ % output the `[mynode]' via a macro so it can be overridden.
+ \xrefprintnodename\printedrefname
+ %
+ % But we always want a comma and a space:
+ ,\space
+ %
+ % output the `page 3'.
+ \turnoffactive \putwordpage\tie\refx{#1-pg}{}%
+ \fi
+ \fi
+ \endlink
+\endgroup}
+
+% This macro is called from \xrefX for the `[nodename]' part of xref
+% output. It's a separate macro only so it can be changed more easily,
+% since square brackets don't work well in some documents. Particularly
+% one that Bob is working on :).
+%
+\def\xrefprintnodename#1{[#1]}
+
+% Things referred to by \setref.
+%
+\def\Ynothing{}
+\def\Yomitfromtoc{}
+\def\Ynumbered{%
+ \ifnum\secno=0
+ \putwordChapter@tie \the\chapno
+ \else \ifnum\subsecno=0
+ \putwordSection@tie \the\chapno.\the\secno
+ \else \ifnum\subsubsecno=0
+ \putwordSection@tie \the\chapno.\the\secno.\the\subsecno
+ \else
+ \putwordSection@tie \the\chapno.\the\secno.\the\subsecno.\the\subsubsecno
+ \fi\fi\fi
+}
+\def\Yappendix{%
+ \ifnum\secno=0
+ \putwordAppendix@tie @char\the\appendixno{}%
+ \else \ifnum\subsecno=0
+ \putwordSection@tie @char\the\appendixno.\the\secno
+ \else \ifnum\subsubsecno=0
+ \putwordSection@tie @char\the\appendixno.\the\secno.\the\subsecno
+ \else
+ \putwordSection@tie
+ @char\the\appendixno.\the\secno.\the\subsecno.\the\subsubsecno
+ \fi\fi\fi
+}
+
+% Define \refx{NAME}{SUFFIX} to reference a cross-reference string named NAME.
+% If its value is nonempty, SUFFIX is output afterward.
+%
+\def\refx#1#2{%
+ {%
+ \indexnofonts
+ \otherbackslash
+ \expandafter\global\expandafter\let\expandafter\thisrefX
+ \csname XR#1\endcsname
+ }%
+ \ifx\thisrefX\relax
+ % If not defined, say something at least.
+ \angleleft un\-de\-fined\angleright
+ \iflinks
+ \ifhavexrefs
+ \message{\linenumber Undefined cross reference `#1'.}%
+ \else
+ \ifwarnedxrefs\else
+ \global\warnedxrefstrue
+ \message{Cross reference values unknown; you must run TeX again.}%
+ \fi
+ \fi
+ \fi
+ \else
+ % It's defined, so just use it.
+ \thisrefX
+ \fi
+ #2% Output the suffix in any case.
+}
+
+% This is the macro invoked by entries in the aux file. Usually it's
+% just a \def (we prepend XR to the control sequence name to avoid
+% collisions). But if this is a float type, we have more work to do.
+%
+\def\xrdef#1#2{%
+ {% The node name might contain 8-bit characters, which in our current
+ % implementation are changed to commands like @'e. Don't let these
+ % mess up the control sequence name.
+ \indexnofonts
+ \turnoffactive
+ \xdef\safexrefname{#1}%
+ }%
+ %
+ \expandafter\gdef\csname XR\safexrefname\endcsname{#2}% remember this xref
+ %
+ % Was that xref control sequence that we just defined for a float?
+ \expandafter\iffloat\csname XR\safexrefname\endcsname
+ % it was a float, and we have the (safe) float type in \iffloattype.
+ \expandafter\let\expandafter\floatlist
+ \csname floatlist\iffloattype\endcsname
+ %
+ % Is this the first time we've seen this float type?
+ \expandafter\ifx\floatlist\relax
+ \toks0 = {\do}% yes, so just \do
+ \else
+ % had it before, so preserve previous elements in list.
+ \toks0 = \expandafter{\floatlist\do}%
+ \fi
+ %
+ % Remember this xref in the control sequence \floatlistFLOATTYPE,
+ % for later use in \listoffloats.
+ \expandafter\xdef\csname floatlist\iffloattype\endcsname{\the\toks0
+ {\safexrefname}}%
+ \fi
+}
+
+% Read the last existing aux file, if any. No error if none exists.
+%
+\def\tryauxfile{%
+ \openin 1 \jobname.aux
+ \ifeof 1 \else
+ \readdatafile{aux}%
+ \global\havexrefstrue
+ \fi
+ \closein 1
+}
+
+\def\setupdatafile{%
+ \catcode`\^^@=\other
+ \catcode`\^^A=\other
+ \catcode`\^^B=\other
+ \catcode`\^^C=\other
+ \catcode`\^^D=\other
+ \catcode`\^^E=\other
+ \catcode`\^^F=\other
+ \catcode`\^^G=\other
+ \catcode`\^^H=\other
+ \catcode`\^^K=\other
+ \catcode`\^^L=\other
+ \catcode`\^^N=\other
+ \catcode`\^^P=\other
+ \catcode`\^^Q=\other
+ \catcode`\^^R=\other
+ \catcode`\^^S=\other
+ \catcode`\^^T=\other
+ \catcode`\^^U=\other
+ \catcode`\^^V=\other
+ \catcode`\^^W=\other
+ \catcode`\^^X=\other
+ \catcode`\^^Z=\other
+ \catcode`\^^[=\other
+ \catcode`\^^\=\other
+ \catcode`\^^]=\other
+ \catcode`\^^^=\other
+ \catcode`\^^_=\other
+ % It was suggested to set the catcode of ^ to 7, which would allow ^^e4 etc.
+ % in xref tags, i.e., node names. But since ^^e4 notation isn't
+ % supported in the main text, it doesn't seem desirable. Furthermore,
+ % that is not enough: for node names that actually contain a ^
+ % character, we would end up writing a line like this: 'xrdef {'hat
+ % b-title}{'hat b} and \xrdef does a \csname...\endcsname on the first
+ % argument, and \hat is not an expandable control sequence. It could
+ % all be worked out, but why? Either we support ^^ or we don't.
+ %
+ % The other change necessary for this was to define \auxhat:
+ % \def\auxhat{\def^{'hat }}% extra space so ok if followed by letter
+ % and then to call \auxhat in \setq.
+ %
+ \catcode`\^=\other
+ %
+ % Special characters. Should be turned off anyway, but...
+ \catcode`\~=\other
+ \catcode`\[=\other
+ \catcode`\]=\other
+ \catcode`\"=\other
+ \catcode`\_=\other
+ \catcode`\|=\other
+ \catcode`\<=\other
+ \catcode`\>=\other
+ \catcode`\$=\other
+ \catcode`\#=\other
+ \catcode`\&=\other
+ \catcode`\%=\other
+ \catcode`+=\other % avoid \+ for paranoia even though we've turned it off
+ %
+ % This is to support \ in node names and titles, since the \
+ % characters end up in a \csname. It's easier than
+ % leaving it active and making its active definition an actual \
+ % character. What I don't understand is why it works in the *value*
+ % of the xrdef. Seems like it should be a catcode12 \, and that
+ % should not typeset properly. But it works, so I'm moving on for
+ % now. --karl, 15jan04.
+ \catcode`\\=\other
+ %
+ % Make the characters 128-255 be printing characters.
+ {%
+ \count1=128
+ \def\loop{%
+ \catcode\count1=\other
+ \advance\count1 by 1
+ \ifnum \count1<256 \loop \fi
+ }%
+ }%
+ %
+ % @ is our escape character in .aux files, and we need braces.
+ \catcode`\{=1
+ \catcode`\}=2
+ \catcode`\@=0
+}
+
+\def\readdatafile#1{%
+\begingroup
+ \setupdatafile
+ \input\jobname.#1
+\endgroup}
+
+
+\message{insertions,}
+% including footnotes.
+
+\newcount \footnoteno
+
+% The trailing space in the following definition for supereject is
+% vital for proper filling; pages come out unaligned when you do a
+% pagealignmacro call if that space before the closing brace is
+% removed. (Generally, numeric constants should always be followed by a
+% space to prevent strange expansion errors.)
+\def\supereject{\par\penalty -20000\footnoteno =0 }
+
+% @footnotestyle is meaningful for info output only.
+\let\footnotestyle=\comment
+
+{\catcode `\@=11
+%
+% Auto-number footnotes. Otherwise like plain.
+\gdef\footnote{%
+ \let\indent=\ptexindent
+ \let\noindent=\ptexnoindent
+ \global\advance\footnoteno by \@ne
+ \edef\thisfootno{$^{\the\footnoteno}$}%
+ %
+ % In case the footnote comes at the end of a sentence, preserve the
+ % extra spacing after we do the footnote number.
+ \let\@sf\empty
+ \ifhmode\edef\@sf{\spacefactor\the\spacefactor}\ptexslash\fi
+ %
+ % Remove inadvertent blank space before typesetting the footnote number.
+ \unskip
+ \thisfootno\@sf
+ \dofootnote
+}%
+
+% Don't bother with the trickery in plain.tex to not require the
+% footnote text as a parameter. Our footnotes don't need to be so general.
+%
+% Oh yes, they do; otherwise, @ifset (and anything else that uses
+% \parseargline) fails inside footnotes because the tokens are fixed when
+% the footnote is read. --karl, 16nov96.
+%
+\gdef\dofootnote{%
+ \insert\footins\bgroup
+ % We want to typeset this text as a normal paragraph, even if the
+ % footnote reference occurs in (for example) a display environment.
+ % So reset some parameters.
+ \hsize=\pagewidth
+ \interlinepenalty\interfootnotelinepenalty
+ \splittopskip\ht\strutbox % top baseline for broken footnotes
+ \splitmaxdepth\dp\strutbox
+ \floatingpenalty\@MM
+ \leftskip\z@skip
+ \rightskip\z@skip
+ \spaceskip\z@skip
+ \xspaceskip\z@skip
+ \parindent\defaultparindent
+ %
+ \smallfonts \rm
+ %
+ % Because we use hanging indentation in footnotes, a @noindent appears
+ % to exdent this text, so make it be a no-op. makeinfo does not use
+ % hanging indentation so @noindent can still be needed within footnote
+ % text after an @example or the like (not that this is good style).
+ \let\noindent = \relax
+ %
+ % Hang the footnote text off the number. Use \everypar in case the
+ % footnote extends for more than one paragraph.
+ \everypar = {\hang}%
+ \textindent{\thisfootno}%
+ %
+ % Don't crash into the line above the footnote text. Since this
+ % expands into a box, it must come within the paragraph, lest it
+ % provide a place where TeX can split the footnote.
+ \footstrut
+ \futurelet\next\fo@t
+}
+}%end \catcode `\@=11
+
+% In case a @footnote appears in a vbox, save the footnote text and create
+% the real \insert just after the vbox finished. Otherwise, the insertion
+% would be lost.
+% Similarily, if a @footnote appears inside an alignment, save the footnote
+% text to a box and make the \insert when a row of the table is finished.
+% And the same can be done for other insert classes. --kasal, 16nov03.
+
+% Replace the \insert primitive by a cheating macro.
+% Deeper inside, just make sure that the saved insertions are not spilled
+% out prematurely.
+%
+\def\startsavinginserts{%
+ \ifx \insert\ptexinsert
+ \let\insert\saveinsert
+ \else
+ \let\checkinserts\relax
+ \fi
+}
+
+% This \insert replacement works for both \insert\footins{foo} and
+% \insert\footins\bgroup foo\egroup, but it doesn't work for \insert27{foo}.
+%
+\def\saveinsert#1{%
+ \edef\next{\noexpand\savetobox \makeSAVEname#1}%
+ \afterassignment\next
+ % swallow the left brace
+ \let\temp =
+}
+\def\makeSAVEname#1{\makecsname{SAVE\expandafter\gobble\string#1}}
+\def\savetobox#1{\global\setbox#1 = \vbox\bgroup \unvbox#1}
+
+\def\checksaveins#1{\ifvoid#1\else \placesaveins#1\fi}
+
+\def\placesaveins#1{%
+ \ptexinsert \csname\expandafter\gobblesave\string#1\endcsname
+ {\box#1}%
+}
+
+% eat @SAVE -- beware, all of them have catcode \other:
+{
+ \def\dospecials{\do S\do A\do V\do E} \uncatcodespecials % ;-)
+ \gdef\gobblesave @SAVE{}
+}
+
+% initialization:
+\def\newsaveins #1{%
+ \edef\next{\noexpand\newsaveinsX \makeSAVEname#1}%
+ \next
+}
+\def\newsaveinsX #1{%
+ \csname newbox\endcsname #1%
+ \expandafter\def\expandafter\checkinserts\expandafter{\checkinserts
+ \checksaveins #1}%
+}
+
+% initialize:
+\let\checkinserts\empty
+\newsaveins\footins
+\newsaveins\margin
+
+
+% @image. We use the macros from epsf.tex to support this.
+% If epsf.tex is not installed and @image is used, we complain.
+%
+% Check for and read epsf.tex up front. If we read it only at @image
+% time, we might be inside a group, and then its definitions would get
+% undone and the next image would fail.
+\openin 1 = epsf.tex
+\ifeof 1 \else
+ % Do not bother showing banner with epsf.tex v2.7k (available in
+ % doc/epsf.tex and on ctan).
+ \def\epsfannounce{\toks0 = }%
+ \input epsf.tex
+\fi
+\closein 1
+%
+% We will only complain once about lack of epsf.tex.
+\newif\ifwarnednoepsf
+\newhelp\noepsfhelp{epsf.tex must be installed for images to
+ work. It is also included in the Texinfo distribution, or you can get
+ it from ftp://tug.org/tex/epsf.tex.}
+%
+\def\image#1{%
+ \ifx\epsfbox\undefined
+ \ifwarnednoepsf \else
+ \errhelp = \noepsfhelp
+ \errmessage{epsf.tex not found, images will be ignored}%
+ \global\warnednoepsftrue
+ \fi
+ \else
+ \imagexxx #1,,,,,\finish
+ \fi
+}
+%
+% Arguments to @image:
+% #1 is (mandatory) image filename; we tack on .eps extension.
+% #2 is (optional) width, #3 is (optional) height.
+% #4 is (ignored optional) html alt text.
+% #5 is (ignored optional) extension.
+% #6 is just the usual extra ignored arg for parsing this stuff.
+\newif\ifimagevmode
+\def\imagexxx#1,#2,#3,#4,#5,#6\finish{\begingroup
+ \catcode`\^^M = 5 % in case we're inside an example
+ \normalturnoffactive % allow _ et al. in names
+ % If the image is by itself, center it.
+ \ifvmode
+ \imagevmodetrue
+ \nobreak\bigskip
+ % Usually we'll have text after the image which will insert
+ % \parskip glue, so insert it here too to equalize the space
+ % above and below.
+ \nobreak\vskip\parskip
+ \nobreak
+ \line\bgroup
+ \fi
+ %
+ % Output the image.
+ \ifpdf
+ \dopdfimage{#1}{#2}{#3}%
+ \else
+ % \epsfbox itself resets \epsf?size at each figure.
+ \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \epsfxsize=#2\relax \fi
+ \setbox0 = \hbox{\ignorespaces #3}\ifdim\wd0 > 0pt \epsfysize=#3\relax \fi
+ \epsfbox{#1.eps}%
+ \fi
+ %
+ \ifimagevmode \egroup \bigbreak \fi % space after the image
+\endgroup}
+
+
+% @float FLOATTYPE,LABEL,LOC ... @end float for displayed figures, tables,
+% etc. We don't actually implement floating yet, we always include the
+% float "here". But it seemed the best name for the future.
+%
+\envparseargdef\float{\eatcommaspace\eatcommaspace\dofloat#1, , ,\finish}
+
+% There may be a space before second and/or third parameter; delete it.
+\def\eatcommaspace#1, {#1,}
+
+% #1 is the optional FLOATTYPE, the text label for this float, typically
+% "Figure", "Table", "Example", etc. Can't contain commas. If omitted,
+% this float will not be numbered and cannot be referred to.
+%
+% #2 is the optional xref label. Also must be present for the float to
+% be referable.
+%
+% #3 is the optional positioning argument; for now, it is ignored. It
+% will somehow specify the positions allowed to float to (here, top, bottom).
+%
+% We keep a separate counter for each FLOATTYPE, which we reset at each
+% chapter-level command.
+\let\resetallfloatnos=\empty
+%
+\def\dofloat#1,#2,#3,#4\finish{%
+ \let\thiscaption=\empty
+ \let\thisshortcaption=\empty
+ %
+ % don't lose footnotes inside @float.
+ %
+ % BEWARE: when the floats start float, we have to issue warning whenever an
+ % insert appears inside a float which could possibly float. --kasal, 26may04
+ %
+ \startsavinginserts
+ %
+ % We can't be used inside a paragraph.
+ \par
+ %
+ \vtop\bgroup
+ \def\floattype{#1}%
+ \def\floatlabel{#2}%
+ \def\floatloc{#3}% we do nothing with this yet.
+ %
+ \ifx\floattype\empty
+ \let\safefloattype=\empty
+ \else
+ {%
+ % the floattype might have accents or other special characters,
+ % but we need to use it in a control sequence name.
+ \indexnofonts
+ \turnoffactive
+ \xdef\safefloattype{\floattype}%
+ }%
+ \fi
+ %
+ % If label is given but no type, we handle that as the empty type.
+ \ifx\floatlabel\empty \else
+ % We want each FLOATTYPE to be numbered separately (Figure 1,
+ % Table 1, Figure 2, ...). (And if no label, no number.)
+ %
+ \expandafter\getfloatno\csname\safefloattype floatno\endcsname
+ \global\advance\floatno by 1
+ %
+ {%
+ % This magic value for \lastsection is output by \setref as the
+ % XREFLABEL-title value. \xrefX uses it to distinguish float
+ % labels (which have a completely different output format) from
+ % node and anchor labels. And \xrdef uses it to construct the
+ % lists of floats.
+ %
+ \edef\lastsection{\floatmagic=\safefloattype}%
+ \setref{\floatlabel}{Yfloat}%
+ }%
+ \fi
+ %
+ % start with \parskip glue, I guess.
+ \vskip\parskip
+ %
+ % Don't suppress indentation if a float happens to start a section.
+ \restorefirstparagraphindent
+}
+
+% we have these possibilities:
+% @float Foo,lbl & @caption{Cap}: Foo 1.1: Cap
+% @float Foo,lbl & no caption: Foo 1.1
+% @float Foo & @caption{Cap}: Foo: Cap
+% @float Foo & no caption: Foo
+% @float ,lbl & Caption{Cap}: 1.1: Cap
+% @float ,lbl & no caption: 1.1
+% @float & @caption{Cap}: Cap
+% @float & no caption:
+%
+\def\Efloat{%
+ \let\floatident = \empty
+ %
+ % In all cases, if we have a float type, it comes first.
+ \ifx\floattype\empty \else \def\floatident{\floattype}\fi
+ %
+ % If we have an xref label, the number comes next.
+ \ifx\floatlabel\empty \else
+ \ifx\floattype\empty \else % if also had float type, need tie first.
+ \appendtomacro\floatident{\tie}%
+ \fi
+ % the number.
+ \appendtomacro\floatident{\chaplevelprefix\the\floatno}%
+ \fi
+ %
+ % Start the printed caption with what we've constructed in
+ % \floatident, but keep it separate; we need \floatident again.
+ \let\captionline = \floatident
+ %
+ \ifx\thiscaption\empty \else
+ \ifx\floatident\empty \else
+ \appendtomacro\captionline{: }% had ident, so need a colon between
+ \fi
+ %
+ % caption text.
+ \appendtomacro\captionline{\scanexp\thiscaption}%
+ \fi
+ %
+ % If we have anything to print, print it, with space before.
+ % Eventually this needs to become an \insert.
+ \ifx\captionline\empty \else
+ \vskip.5\parskip
+ \captionline
+ %
+ % Space below caption.
+ \vskip\parskip
+ \fi
+ %
+ % If have an xref label, write the list of floats info. Do this
+ % after the caption, to avoid chance of it being a breakpoint.
+ \ifx\floatlabel\empty \else
+ % Write the text that goes in the lof to the aux file as
+ % \floatlabel-lof. Besides \floatident, we include the short
+ % caption if specified, else the full caption if specified, else nothing.
+ {%
+ \atdummies
+ %
+ % since we read the caption text in the macro world, where ^^M
+ % is turned into a normal character, we have to scan it back, so
+ % we don't write the literal three characters "^^M" into the aux file.
+ \scanexp{%
+ \xdef\noexpand\gtemp{%
+ \ifx\thisshortcaption\empty
+ \thiscaption
+ \else
+ \thisshortcaption
+ \fi
+ }%
+ }%
+ \immediate\write\auxfile{@xrdef{\floatlabel-lof}{\floatident
+ \ifx\gtemp\empty \else : \gtemp \fi}}%
+ }%
+ \fi
+ \egroup % end of \vtop
+ %
+ % place the captured inserts
+ %
+ % BEWARE: when the floats start floating, we have to issue warning
+ % whenever an insert appears inside a float which could possibly
+ % float. --kasal, 26may04
+ %
+ \checkinserts
+}
+
+% Append the tokens #2 to the definition of macro #1, not expanding either.
+%
+\def\appendtomacro#1#2{%
+ \expandafter\def\expandafter#1\expandafter{#1#2}%
+}
+
+% @caption, @shortcaption
+%
+\def\caption{\docaption\thiscaption}
+\def\shortcaption{\docaption\thisshortcaption}
+\def\docaption{\checkenv\float \bgroup\scanargctxt\defcaption}
+\def\defcaption#1#2{\egroup \def#1{#2}}
+
+% The parameter is the control sequence identifying the counter we are
+% going to use. Create it if it doesn't exist and assign it to \floatno.
+\def\getfloatno#1{%
+ \ifx#1\relax
+ % Haven't seen this figure type before.
+ \csname newcount\endcsname #1%
+ %
+ % Remember to reset this floatno at the next chap.
+ \expandafter\gdef\expandafter\resetallfloatnos
+ \expandafter{\resetallfloatnos #1=0 }%
+ \fi
+ \let\floatno#1%
+}
+
+% \setref calls this to get the XREFLABEL-snt value. We want an @xref
+% to the FLOATLABEL to expand to "Figure 3.1". We call \setref when we
+% first read the @float command.
+%
+\def\Yfloat{\floattype@tie \chaplevelprefix\the\floatno}%
+
+% Magic string used for the XREFLABEL-title value, so \xrefX can
+% distinguish floats from other xref types.
+\def\floatmagic{!!float!!}
+
+% #1 is the control sequence we are passed; we expand into a conditional
+% which is true if #1 represents a float ref. That is, the magic
+% \lastsection value which we \setref above.
+%
+\def\iffloat#1{\expandafter\doiffloat#1==\finish}
+%
+% #1 is (maybe) the \floatmagic string. If so, #2 will be the
+% (safe) float type for this float. We set \iffloattype to #2.
+%
+\def\doiffloat#1=#2=#3\finish{%
+ \def\temp{#1}%
+ \def\iffloattype{#2}%
+ \ifx\temp\floatmagic
+}
+
+% @listoffloats FLOATTYPE - print a list of floats like a table of contents.
+%
+\parseargdef\listoffloats{%
+ \def\floattype{#1}% floattype
+ {%
+ % the floattype might have accents or other special characters,
+ % but we need to use it in a control sequence name.
+ \indexnofonts
+ \turnoffactive
+ \xdef\safefloattype{\floattype}%
+ }%
+ %
+ % \xrdef saves the floats as a \do-list in \floatlistSAFEFLOATTYPE.
+ \expandafter\ifx\csname floatlist\safefloattype\endcsname \relax
+ \ifhavexrefs
+ % if the user said @listoffloats foo but never @float foo.
+ \message{\linenumber No `\safefloattype' floats to list.}%
+ \fi
+ \else
+ \begingroup
+ \leftskip=\tocindent % indent these entries like a toc
+ \let\do=\listoffloatsdo
+ \csname floatlist\safefloattype\endcsname
+ \endgroup
+ \fi
+}
+
+% This is called on each entry in a list of floats. We're passed the
+% xref label, in the form LABEL-title, which is how we save it in the
+% aux file. We strip off the -title and look up \XRLABEL-lof, which
+% has the text we're supposed to typeset here.
+%
+% Figures without xref labels will not be included in the list (since
+% they won't appear in the aux file).
+%
+\def\listoffloatsdo#1{\listoffloatsdoentry#1\finish}
+\def\listoffloatsdoentry#1-title\finish{{%
+ % Can't fully expand XR#1-lof because it can contain anything. Just
+ % pass the control sequence. On the other hand, XR#1-pg is just the
+ % page number, and we want to fully expand that so we can get a link
+ % in pdf output.
+ \toksA = \expandafter{\csname XR#1-lof\endcsname}%
+ %
+ % use the same \entry macro we use to generate the TOC and index.
+ \edef\writeentry{\noexpand\entry{\the\toksA}{\csname XR#1-pg\endcsname}}%
+ \writeentry
+}}
+
+
+\message{localization,}
+
+% @documentlanguage is usually given very early, just after
+% @setfilename. If done too late, it may not override everything
+% properly. Single argument is the language (de) or locale (de_DE)
+% abbreviation. It would be nice if we could set up a hyphenation file.
+%
+{
+ \catcode`\_ = \active
+ \globaldefs=1
+\parseargdef\documentlanguage{\begingroup
+ \let_=\normalunderscore % normal _ character for filenames
+ \tex % read txi-??.tex file in plain TeX.
+ % Read the file by the name they passed if it exists.
+ \openin 1 txi-#1.tex
+ \ifeof 1
+ \documentlanguagetrywithoutunderscore{#1_\finish}%
+ \else
+ \input txi-#1.tex
+ \fi
+ \closein 1
+ \endgroup
+\endgroup}
+}
+%
+% If they passed de_DE, and txi-de_DE.tex doesn't exist,
+% try txi-de.tex.
+%
+\def\documentlanguagetrywithoutunderscore#1_#2\finish{%
+ \openin 1 txi-#1.tex
+ \ifeof 1
+ \errhelp = \nolanghelp
+ \errmessage{Cannot read language file txi-#1.tex}%
+ \else
+ \input txi-#1.tex
+ \fi
+ \closein 1
+}
+%
+\newhelp\nolanghelp{The given language definition file cannot be found or
+is empty. Maybe you need to install it? In the current directory
+should work if nowhere else does.}
+
+% Set the catcode of characters 128 through 255 to the specified number.
+%
+\def\setnonasciicharscatcode#1{%
+ \count255=128
+ \loop\ifnum\count255<256
+ \global\catcode\count255=#1\relax
+ \advance\count255 by 1
+ \repeat
+}
+
+\def\setnonasciicharscatcodenonglobal#1{%
+ \count255=128
+ \loop\ifnum\count255<256
+ \catcode\count255=#1\relax
+ \advance\count255 by 1
+ \repeat
+}
+
+% @documentencoding sets the definition of non-ASCII characters
+% according to the specified encoding.
+%
+\parseargdef\documentencoding{%
+ % Encoding being declared for the document.
+ \def\declaredencoding{\csname #1.enc\endcsname}%
+ %
+ % Supported encodings: names converted to tokens in order to be able
+ % to compare them with \ifx.
+ \def\ascii{\csname US-ASCII.enc\endcsname}%
+ \def\latnine{\csname ISO-8859-15.enc\endcsname}%
+ \def\latone{\csname ISO-8859-1.enc\endcsname}%
+ \def\lattwo{\csname ISO-8859-2.enc\endcsname}%
+ \def\utfeight{\csname UTF-8.enc\endcsname}%
+ %
+ \ifx \declaredencoding \ascii
+ \asciichardefs
+ %
+ \else \ifx \declaredencoding \lattwo
+ \setnonasciicharscatcode\active
+ \lattwochardefs
+ %
+ \else \ifx \declaredencoding \latone
+ \setnonasciicharscatcode\active
+ \latonechardefs
+ %
+ \else \ifx \declaredencoding \latnine
+ \setnonasciicharscatcode\active
+ \latninechardefs
+ %
+ \else \ifx \declaredencoding \utfeight
+ \setnonasciicharscatcode\active
+ \utfeightchardefs
+ %
+ \else
+ \message{Unknown document encoding #1, ignoring.}%
+ %
+ \fi % utfeight
+ \fi % latnine
+ \fi % latone
+ \fi % lattwo
+ \fi % ascii
+}
+
+% A message to be logged when using a character that isn't available
+% the default font encoding (OT1).
+%
+\def\missingcharmsg#1{\message{Character missing in OT1 encoding: #1.}}
+
+% Take account of \c (plain) vs. \, (Texinfo) difference.
+\def\cedilla#1{\ifx\c\ptexc\c{#1}\else\,{#1}\fi}
+
+% First, make active non-ASCII characters in order for them to be
+% correctly categorized when TeX reads the replacement text of
+% macros containing the character definitions.
+\setnonasciicharscatcode\active
+%
+% Latin1 (ISO-8859-1) character definitions.
+\def\latonechardefs{%
+ \gdef^^a0{~}
+ \gdef^^a1{\exclamdown}
+ \gdef^^a2{\missingcharmsg{CENT SIGN}}
+ \gdef^^a3{{\pounds}}
+ \gdef^^a4{\missingcharmsg{CURRENCY SIGN}}
+ \gdef^^a5{\missingcharmsg{YEN SIGN}}
+ \gdef^^a6{\missingcharmsg{BROKEN BAR}}
+ \gdef^^a7{\S}
+ \gdef^^a8{\"{}}
+ \gdef^^a9{\copyright}
+ \gdef^^aa{\ordf}
+ \gdef^^ab{\missingcharmsg{LEFT-POINTING DOUBLE ANGLE QUOTATION MARK}}
+ \gdef^^ac{$\lnot$}
+ \gdef^^ad{\-}
+ \gdef^^ae{\registeredsymbol}
+ \gdef^^af{\={}}
+ %
+ \gdef^^b0{\textdegree}
+ \gdef^^b1{$\pm$}
+ \gdef^^b2{$^2$}
+ \gdef^^b3{$^3$}
+ \gdef^^b4{\'{}}
+ \gdef^^b5{$\mu$}
+ \gdef^^b6{\P}
+ %
+ \gdef^^b7{$^.$}
+ \gdef^^b8{\cedilla\ }
+ \gdef^^b9{$^1$}
+ \gdef^^ba{\ordm}
+ %
+ \gdef^^bb{\missingcharmsg{RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK}}
+ \gdef^^bc{$1\over4$}
+ \gdef^^bd{$1\over2$}
+ \gdef^^be{$3\over4$}
+ \gdef^^bf{\questiondown}
+ %
+ \gdef^^c0{\`A}
+ \gdef^^c1{\'A}
+ \gdef^^c2{\^A}
+ \gdef^^c3{\~A}
+ \gdef^^c4{\"A}
+ \gdef^^c5{\ringaccent A}
+ \gdef^^c6{\AE}
+ \gdef^^c7{\cedilla C}
+ \gdef^^c8{\`E}
+ \gdef^^c9{\'E}
+ \gdef^^ca{\^E}
+ \gdef^^cb{\"E}
+ \gdef^^cc{\`I}
+ \gdef^^cd{\'I}
+ \gdef^^ce{\^I}
+ \gdef^^cf{\"I}
+ %
+ \gdef^^d0{\missingcharmsg{LATIN CAPITAL LETTER ETH}}
+ \gdef^^d1{\~N}
+ \gdef^^d2{\`O}
+ \gdef^^d3{\'O}
+ \gdef^^d4{\^O}
+ \gdef^^d5{\~O}
+ \gdef^^d6{\"O}
+ \gdef^^d7{$\times$}
+ \gdef^^d8{\O}
+ \gdef^^d9{\`U}
+ \gdef^^da{\'U}
+ \gdef^^db{\^U}
+ \gdef^^dc{\"U}
+ \gdef^^dd{\'Y}
+ \gdef^^de{\missingcharmsg{LATIN CAPITAL LETTER THORN}}
+ \gdef^^df{\ss}
+ %
+ \gdef^^e0{\`a}
+ \gdef^^e1{\'a}
+ \gdef^^e2{\^a}
+ \gdef^^e3{\~a}
+ \gdef^^e4{\"a}
+ \gdef^^e5{\ringaccent a}
+ \gdef^^e6{\ae}
+ \gdef^^e7{\cedilla c}
+ \gdef^^e8{\`e}
+ \gdef^^e9{\'e}
+ \gdef^^ea{\^e}
+ \gdef^^eb{\"e}
+ \gdef^^ec{\`{\dotless i}}
+ \gdef^^ed{\'{\dotless i}}
+ \gdef^^ee{\^{\dotless i}}
+ \gdef^^ef{\"{\dotless i}}
+ %
+ \gdef^^f0{\missingcharmsg{LATIN SMALL LETTER ETH}}
+ \gdef^^f1{\~n}
+ \gdef^^f2{\`o}
+ \gdef^^f3{\'o}
+ \gdef^^f4{\^o}
+ \gdef^^f5{\~o}
+ \gdef^^f6{\"o}
+ \gdef^^f7{$\div$}
+ \gdef^^f8{\o}
+ \gdef^^f9{\`u}
+ \gdef^^fa{\'u}
+ \gdef^^fb{\^u}
+ \gdef^^fc{\"u}
+ \gdef^^fd{\'y}
+ \gdef^^fe{\missingcharmsg{LATIN SMALL LETTER THORN}}
+ \gdef^^ff{\"y}
+}
+
+% Latin9 (ISO-8859-15) encoding character definitions.
+\def\latninechardefs{%
+ % Encoding is almost identical to Latin1.
+ \latonechardefs
+ %
+ \gdef^^a4{\euro}
+ \gdef^^a6{\v S}
+ \gdef^^a8{\v s}
+ \gdef^^b4{\v Z}
+ \gdef^^b8{\v z}
+ \gdef^^bc{\OE}
+ \gdef^^bd{\oe}
+ \gdef^^be{\"Y}
+}
+
+% Latin2 (ISO-8859-2) character definitions.
+\def\lattwochardefs{%
+ \gdef^^a0{~}
+ \gdef^^a1{\missingcharmsg{LATIN CAPITAL LETTER A WITH OGONEK}}
+ \gdef^^a2{\u{}}
+ \gdef^^a3{\L}
+ \gdef^^a4{\missingcharmsg{CURRENCY SIGN}}
+ \gdef^^a5{\v L}
+ \gdef^^a6{\'S}
+ \gdef^^a7{\S}
+ \gdef^^a8{\"{}}
+ \gdef^^a9{\v S}
+ \gdef^^aa{\cedilla S}
+ \gdef^^ab{\v T}
+ \gdef^^ac{\'Z}
+ \gdef^^ad{\-}
+ \gdef^^ae{\v Z}
+ \gdef^^af{\dotaccent Z}
+ %
+ \gdef^^b0{\textdegree}
+ \gdef^^b1{\missingcharmsg{LATIN SMALL LETTER A WITH OGONEK}}
+ \gdef^^b2{\missingcharmsg{OGONEK}}
+ \gdef^^b3{\l}
+ \gdef^^b4{\'{}}
+ \gdef^^b5{\v l}
+ \gdef^^b6{\'s}
+ \gdef^^b7{\v{}}
+ \gdef^^b8{\cedilla\ }
+ \gdef^^b9{\v s}
+ \gdef^^ba{\cedilla s}
+ \gdef^^bb{\v t}
+ \gdef^^bc{\'z}
+ \gdef^^bd{\H{}}
+ \gdef^^be{\v z}
+ \gdef^^bf{\dotaccent z}
+ %
+ \gdef^^c0{\'R}
+ \gdef^^c1{\'A}
+ \gdef^^c2{\^A}
+ \gdef^^c3{\u A}
+ \gdef^^c4{\"A}
+ \gdef^^c5{\'L}
+ \gdef^^c6{\'C}
+ \gdef^^c7{\cedilla C}
+ \gdef^^c8{\v C}
+ \gdef^^c9{\'E}
+ \gdef^^ca{\missingcharmsg{LATIN CAPITAL LETTER E WITH OGONEK}}
+ \gdef^^cb{\"E}
+ \gdef^^cc{\v E}
+ \gdef^^cd{\'I}
+ \gdef^^ce{\^I}
+ \gdef^^cf{\v D}
+ %
+ \gdef^^d0{\missingcharmsg{LATIN CAPITAL LETTER D WITH STROKE}}
+ \gdef^^d1{\'N}
+ \gdef^^d2{\v N}
+ \gdef^^d3{\'O}
+ \gdef^^d4{\^O}
+ \gdef^^d5{\H O}
+ \gdef^^d6{\"O}
+ \gdef^^d7{$\times$}
+ \gdef^^d8{\v R}
+ \gdef^^d9{\ringaccent U}
+ \gdef^^da{\'U}
+ \gdef^^db{\H U}
+ \gdef^^dc{\"U}
+ \gdef^^dd{\'Y}
+ \gdef^^de{\cedilla T}
+ \gdef^^df{\ss}
+ %
+ \gdef^^e0{\'r}
+ \gdef^^e1{\'a}
+ \gdef^^e2{\^a}
+ \gdef^^e3{\u a}
+ \gdef^^e4{\"a}
+ \gdef^^e5{\'l}
+ \gdef^^e6{\'c}
+ \gdef^^e7{\cedilla c}
+ \gdef^^e8{\v c}
+ \gdef^^e9{\'e}
+ \gdef^^ea{\missingcharmsg{LATIN SMALL LETTER E WITH OGONEK}}
+ \gdef^^eb{\"e}
+ \gdef^^ec{\v e}
+ \gdef^^ed{\'\i}
+ \gdef^^ee{\^\i}
+ \gdef^^ef{\v d}
+ %
+ \gdef^^f0{\missingcharmsg{LATIN SMALL LETTER D WITH STROKE}}
+ \gdef^^f1{\'n}
+ \gdef^^f2{\v n}
+ \gdef^^f3{\'o}
+ \gdef^^f4{\^o}
+ \gdef^^f5{\H o}
+ \gdef^^f6{\"o}
+ \gdef^^f7{$\div$}
+ \gdef^^f8{\v r}
+ \gdef^^f9{\ringaccent u}
+ \gdef^^fa{\'u}
+ \gdef^^fb{\H u}
+ \gdef^^fc{\"u}
+ \gdef^^fd{\'y}
+ \gdef^^fe{\cedilla t}
+ \gdef^^ff{\dotaccent{}}
+}
+
+% UTF-8 character definitions.
+%
+% This code to support UTF-8 is based on LaTeX's utf8.def, with some
+% changes for Texinfo conventions. It is included here under the GPL by
+% permission from Frank Mittelbach and the LaTeX team.
+%
+\newcount\countUTFx
+\newcount\countUTFy
+\newcount\countUTFz
+
+\gdef\UTFviiiTwoOctets#1#2{\expandafter
+ \UTFviiiDefined\csname u8:#1\string #2\endcsname}
+%
+\gdef\UTFviiiThreeOctets#1#2#3{\expandafter
+ \UTFviiiDefined\csname u8:#1\string #2\string #3\endcsname}
+%
+\gdef\UTFviiiFourOctets#1#2#3#4{\expandafter
+ \UTFviiiDefined\csname u8:#1\string #2\string #3\string #4\endcsname}
+
+\gdef\UTFviiiDefined#1{%
+ \ifx #1\relax
+ \message{\linenumber Unicode char \string #1 not defined for Texinfo}%
+ \else
+ \expandafter #1%
+ \fi
+}
+
+\begingroup
+ \catcode`\~13
+ \catcode`\"12
+
+ \def\UTFviiiLoop{%
+ \global\catcode\countUTFx\active
+ \uccode`\~\countUTFx
+ \uppercase\expandafter{\UTFviiiTmp}%
+ \advance\countUTFx by 1
+ \ifnum\countUTFx < \countUTFy
+ \expandafter\UTFviiiLoop
+ \fi}
+
+ \countUTFx = "C2
+ \countUTFy = "E0
+ \def\UTFviiiTmp{%
+ \xdef~{\noexpand\UTFviiiTwoOctets\string~}}
+ \UTFviiiLoop
+
+ \countUTFx = "E0
+ \countUTFy = "F0
+ \def\UTFviiiTmp{%
+ \xdef~{\noexpand\UTFviiiThreeOctets\string~}}
+ \UTFviiiLoop
+
+ \countUTFx = "F0
+ \countUTFy = "F4
+ \def\UTFviiiTmp{%
+ \xdef~{\noexpand\UTFviiiFourOctets\string~}}
+ \UTFviiiLoop
+\endgroup
+
+\begingroup
+ \catcode`\"=12
+ \catcode`\<=12
+ \catcode`\.=12
+ \catcode`\,=12
+ \catcode`\;=12
+ \catcode`\!=12
+ \catcode`\~=13
+
+ \gdef\DeclareUnicodeCharacter#1#2{%
+ \countUTFz = "#1\relax
+ \wlog{\space\space defining Unicode char U+#1 (decimal \the\countUTFz)}%
+ \begingroup
+ \parseXMLCharref
+ \def\UTFviiiTwoOctets##1##2{%
+ \csname u8:##1\string ##2\endcsname}%
+ \def\UTFviiiThreeOctets##1##2##3{%
+ \csname u8:##1\string ##2\string ##3\endcsname}%
+ \def\UTFviiiFourOctets##1##2##3##4{%
+ \csname u8:##1\string ##2\string ##3\string ##4\endcsname}%
+ \expandafter\expandafter\expandafter\expandafter
+ \expandafter\expandafter\expandafter
+ \gdef\UTFviiiTmp{#2}%
+ \endgroup}
+
+ \gdef\parseXMLCharref{%
+ \ifnum\countUTFz < "A0\relax
+ \errhelp = \EMsimple
+ \errmessage{Cannot define Unicode char value < 00A0}%
+ \else\ifnum\countUTFz < "800\relax
+ \parseUTFviiiA,%
+ \parseUTFviiiB C\UTFviiiTwoOctets.,%
+ \else\ifnum\countUTFz < "10000\relax
+ \parseUTFviiiA;%
+ \parseUTFviiiA,%
+ \parseUTFviiiB E\UTFviiiThreeOctets.{,;}%
+ \else
+ \parseUTFviiiA;%
+ \parseUTFviiiA,%
+ \parseUTFviiiA!%
+ \parseUTFviiiB F\UTFviiiFourOctets.{!,;}%
+ \fi\fi\fi
+ }
+
+ \gdef\parseUTFviiiA#1{%
+ \countUTFx = \countUTFz
+ \divide\countUTFz by 64
+ \countUTFy = \countUTFz
+ \multiply\countUTFz by 64
+ \advance\countUTFx by -\countUTFz
+ \advance\countUTFx by 128
+ \uccode `#1\countUTFx
+ \countUTFz = \countUTFy}
+
+ \gdef\parseUTFviiiB#1#2#3#4{%
+ \advance\countUTFz by "#10\relax
+ \uccode `#3\countUTFz
+ \uppercase{\gdef\UTFviiiTmp{#2#3#4}}}
+\endgroup
+
+\def\utfeightchardefs{%
+ \DeclareUnicodeCharacter{00A0}{\tie}
+ \DeclareUnicodeCharacter{00A1}{\exclamdown}
+ \DeclareUnicodeCharacter{00A3}{\pounds}
+ \DeclareUnicodeCharacter{00A8}{\"{ }}
+ \DeclareUnicodeCharacter{00A9}{\copyright}
+ \DeclareUnicodeCharacter{00AA}{\ordf}
+ \DeclareUnicodeCharacter{00AB}{\guillemetleft}
+ \DeclareUnicodeCharacter{00AD}{\-}
+ \DeclareUnicodeCharacter{00AE}{\registeredsymbol}
+ \DeclareUnicodeCharacter{00AF}{\={ }}
+
+ \DeclareUnicodeCharacter{00B0}{\ringaccent{ }}
+ \DeclareUnicodeCharacter{00B4}{\'{ }}
+ \DeclareUnicodeCharacter{00B8}{\cedilla{ }}
+ \DeclareUnicodeCharacter{00BA}{\ordm}
+ \DeclareUnicodeCharacter{00BB}{\guillemetright}
+ \DeclareUnicodeCharacter{00BF}{\questiondown}
+
+ \DeclareUnicodeCharacter{00C0}{\`A}
+ \DeclareUnicodeCharacter{00C1}{\'A}
+ \DeclareUnicodeCharacter{00C2}{\^A}
+ \DeclareUnicodeCharacter{00C3}{\~A}
+ \DeclareUnicodeCharacter{00C4}{\"A}
+ \DeclareUnicodeCharacter{00C5}{\AA}
+ \DeclareUnicodeCharacter{00C6}{\AE}
+ \DeclareUnicodeCharacter{00C7}{\cedilla{C}}
+ \DeclareUnicodeCharacter{00C8}{\`E}
+ \DeclareUnicodeCharacter{00C9}{\'E}
+ \DeclareUnicodeCharacter{00CA}{\^E}
+ \DeclareUnicodeCharacter{00CB}{\"E}
+ \DeclareUnicodeCharacter{00CC}{\`I}
+ \DeclareUnicodeCharacter{00CD}{\'I}
+ \DeclareUnicodeCharacter{00CE}{\^I}
+ \DeclareUnicodeCharacter{00CF}{\"I}
+
+ \DeclareUnicodeCharacter{00D1}{\~N}
+ \DeclareUnicodeCharacter{00D2}{\`O}
+ \DeclareUnicodeCharacter{00D3}{\'O}
+ \DeclareUnicodeCharacter{00D4}{\^O}
+ \DeclareUnicodeCharacter{00D5}{\~O}
+ \DeclareUnicodeCharacter{00D6}{\"O}
+ \DeclareUnicodeCharacter{00D8}{\O}
+ \DeclareUnicodeCharacter{00D9}{\`U}
+ \DeclareUnicodeCharacter{00DA}{\'U}
+ \DeclareUnicodeCharacter{00DB}{\^U}
+ \DeclareUnicodeCharacter{00DC}{\"U}
+ \DeclareUnicodeCharacter{00DD}{\'Y}
+ \DeclareUnicodeCharacter{00DF}{\ss}
+
+ \DeclareUnicodeCharacter{00E0}{\`a}
+ \DeclareUnicodeCharacter{00E1}{\'a}
+ \DeclareUnicodeCharacter{00E2}{\^a}
+ \DeclareUnicodeCharacter{00E3}{\~a}
+ \DeclareUnicodeCharacter{00E4}{\"a}
+ \DeclareUnicodeCharacter{00E5}{\aa}
+ \DeclareUnicodeCharacter{00E6}{\ae}
+ \DeclareUnicodeCharacter{00E7}{\cedilla{c}}
+ \DeclareUnicodeCharacter{00E8}{\`e}
+ \DeclareUnicodeCharacter{00E9}{\'e}
+ \DeclareUnicodeCharacter{00EA}{\^e}
+ \DeclareUnicodeCharacter{00EB}{\"e}
+ \DeclareUnicodeCharacter{00EC}{\`{\dotless{i}}}
+ \DeclareUnicodeCharacter{00ED}{\'{\dotless{i}}}
+ \DeclareUnicodeCharacter{00EE}{\^{\dotless{i}}}
+ \DeclareUnicodeCharacter{00EF}{\"{\dotless{i}}}
+
+ \DeclareUnicodeCharacter{00F1}{\~n}
+ \DeclareUnicodeCharacter{00F2}{\`o}
+ \DeclareUnicodeCharacter{00F3}{\'o}
+ \DeclareUnicodeCharacter{00F4}{\^o}
+ \DeclareUnicodeCharacter{00F5}{\~o}
+ \DeclareUnicodeCharacter{00F6}{\"o}
+ \DeclareUnicodeCharacter{00F8}{\o}
+ \DeclareUnicodeCharacter{00F9}{\`u}
+ \DeclareUnicodeCharacter{00FA}{\'u}
+ \DeclareUnicodeCharacter{00FB}{\^u}
+ \DeclareUnicodeCharacter{00FC}{\"u}
+ \DeclareUnicodeCharacter{00FD}{\'y}
+ \DeclareUnicodeCharacter{00FF}{\"y}
+
+ \DeclareUnicodeCharacter{0100}{\=A}
+ \DeclareUnicodeCharacter{0101}{\=a}
+ \DeclareUnicodeCharacter{0102}{\u{A}}
+ \DeclareUnicodeCharacter{0103}{\u{a}}
+ \DeclareUnicodeCharacter{0106}{\'C}
+ \DeclareUnicodeCharacter{0107}{\'c}
+ \DeclareUnicodeCharacter{0108}{\^C}
+ \DeclareUnicodeCharacter{0109}{\^c}
+ \DeclareUnicodeCharacter{010A}{\dotaccent{C}}
+ \DeclareUnicodeCharacter{010B}{\dotaccent{c}}
+ \DeclareUnicodeCharacter{010C}{\v{C}}
+ \DeclareUnicodeCharacter{010D}{\v{c}}
+ \DeclareUnicodeCharacter{010E}{\v{D}}
+
+ \DeclareUnicodeCharacter{0112}{\=E}
+ \DeclareUnicodeCharacter{0113}{\=e}
+ \DeclareUnicodeCharacter{0114}{\u{E}}
+ \DeclareUnicodeCharacter{0115}{\u{e}}
+ \DeclareUnicodeCharacter{0116}{\dotaccent{E}}
+ \DeclareUnicodeCharacter{0117}{\dotaccent{e}}
+ \DeclareUnicodeCharacter{011A}{\v{E}}
+ \DeclareUnicodeCharacter{011B}{\v{e}}
+ \DeclareUnicodeCharacter{011C}{\^G}
+ \DeclareUnicodeCharacter{011D}{\^g}
+ \DeclareUnicodeCharacter{011E}{\u{G}}
+ \DeclareUnicodeCharacter{011F}{\u{g}}
+
+ \DeclareUnicodeCharacter{0120}{\dotaccent{G}}
+ \DeclareUnicodeCharacter{0121}{\dotaccent{g}}
+ \DeclareUnicodeCharacter{0124}{\^H}
+ \DeclareUnicodeCharacter{0125}{\^h}
+ \DeclareUnicodeCharacter{0128}{\~I}
+ \DeclareUnicodeCharacter{0129}{\~{\dotless{i}}}
+ \DeclareUnicodeCharacter{012A}{\=I}
+ \DeclareUnicodeCharacter{012B}{\={\dotless{i}}}
+ \DeclareUnicodeCharacter{012C}{\u{I}}
+ \DeclareUnicodeCharacter{012D}{\u{\dotless{i}}}
+
+ \DeclareUnicodeCharacter{0130}{\dotaccent{I}}
+ \DeclareUnicodeCharacter{0131}{\dotless{i}}
+ \DeclareUnicodeCharacter{0132}{IJ}
+ \DeclareUnicodeCharacter{0133}{ij}
+ \DeclareUnicodeCharacter{0134}{\^J}
+ \DeclareUnicodeCharacter{0135}{\^{\dotless{j}}}
+ \DeclareUnicodeCharacter{0139}{\'L}
+ \DeclareUnicodeCharacter{013A}{\'l}
+
+ \DeclareUnicodeCharacter{0141}{\L}
+ \DeclareUnicodeCharacter{0142}{\l}
+ \DeclareUnicodeCharacter{0143}{\'N}
+ \DeclareUnicodeCharacter{0144}{\'n}
+ \DeclareUnicodeCharacter{0147}{\v{N}}
+ \DeclareUnicodeCharacter{0148}{\v{n}}
+ \DeclareUnicodeCharacter{014C}{\=O}
+ \DeclareUnicodeCharacter{014D}{\=o}
+ \DeclareUnicodeCharacter{014E}{\u{O}}
+ \DeclareUnicodeCharacter{014F}{\u{o}}
+
+ \DeclareUnicodeCharacter{0150}{\H{O}}
+ \DeclareUnicodeCharacter{0151}{\H{o}}
+ \DeclareUnicodeCharacter{0152}{\OE}
+ \DeclareUnicodeCharacter{0153}{\oe}
+ \DeclareUnicodeCharacter{0154}{\'R}
+ \DeclareUnicodeCharacter{0155}{\'r}
+ \DeclareUnicodeCharacter{0158}{\v{R}}
+ \DeclareUnicodeCharacter{0159}{\v{r}}
+ \DeclareUnicodeCharacter{015A}{\'S}
+ \DeclareUnicodeCharacter{015B}{\'s}
+ \DeclareUnicodeCharacter{015C}{\^S}
+ \DeclareUnicodeCharacter{015D}{\^s}
+ \DeclareUnicodeCharacter{015E}{\cedilla{S}}
+ \DeclareUnicodeCharacter{015F}{\cedilla{s}}
+
+ \DeclareUnicodeCharacter{0160}{\v{S}}
+ \DeclareUnicodeCharacter{0161}{\v{s}}
+ \DeclareUnicodeCharacter{0162}{\cedilla{t}}
+ \DeclareUnicodeCharacter{0163}{\cedilla{T}}
+ \DeclareUnicodeCharacter{0164}{\v{T}}
+
+ \DeclareUnicodeCharacter{0168}{\~U}
+ \DeclareUnicodeCharacter{0169}{\~u}
+ \DeclareUnicodeCharacter{016A}{\=U}
+ \DeclareUnicodeCharacter{016B}{\=u}
+ \DeclareUnicodeCharacter{016C}{\u{U}}
+ \DeclareUnicodeCharacter{016D}{\u{u}}
+ \DeclareUnicodeCharacter{016E}{\ringaccent{U}}
+ \DeclareUnicodeCharacter{016F}{\ringaccent{u}}
+
+ \DeclareUnicodeCharacter{0170}{\H{U}}
+ \DeclareUnicodeCharacter{0171}{\H{u}}
+ \DeclareUnicodeCharacter{0174}{\^W}
+ \DeclareUnicodeCharacter{0175}{\^w}
+ \DeclareUnicodeCharacter{0176}{\^Y}
+ \DeclareUnicodeCharacter{0177}{\^y}
+ \DeclareUnicodeCharacter{0178}{\"Y}
+ \DeclareUnicodeCharacter{0179}{\'Z}
+ \DeclareUnicodeCharacter{017A}{\'z}
+ \DeclareUnicodeCharacter{017B}{\dotaccent{Z}}
+ \DeclareUnicodeCharacter{017C}{\dotaccent{z}}
+ \DeclareUnicodeCharacter{017D}{\v{Z}}
+ \DeclareUnicodeCharacter{017E}{\v{z}}
+
+ \DeclareUnicodeCharacter{01C4}{D\v{Z}}
+ \DeclareUnicodeCharacter{01C5}{D\v{z}}
+ \DeclareUnicodeCharacter{01C6}{d\v{z}}
+ \DeclareUnicodeCharacter{01C7}{LJ}
+ \DeclareUnicodeCharacter{01C8}{Lj}
+ \DeclareUnicodeCharacter{01C9}{lj}
+ \DeclareUnicodeCharacter{01CA}{NJ}
+ \DeclareUnicodeCharacter{01CB}{Nj}
+ \DeclareUnicodeCharacter{01CC}{nj}
+ \DeclareUnicodeCharacter{01CD}{\v{A}}
+ \DeclareUnicodeCharacter{01CE}{\v{a}}
+ \DeclareUnicodeCharacter{01CF}{\v{I}}
+
+ \DeclareUnicodeCharacter{01D0}{\v{\dotless{i}}}
+ \DeclareUnicodeCharacter{01D1}{\v{O}}
+ \DeclareUnicodeCharacter{01D2}{\v{o}}
+ \DeclareUnicodeCharacter{01D3}{\v{U}}
+ \DeclareUnicodeCharacter{01D4}{\v{u}}
+
+ \DeclareUnicodeCharacter{01E2}{\={\AE}}
+ \DeclareUnicodeCharacter{01E3}{\={\ae}}
+ \DeclareUnicodeCharacter{01E6}{\v{G}}
+ \DeclareUnicodeCharacter{01E7}{\v{g}}
+ \DeclareUnicodeCharacter{01E8}{\v{K}}
+ \DeclareUnicodeCharacter{01E9}{\v{k}}
+
+ \DeclareUnicodeCharacter{01F0}{\v{\dotless{j}}}
+ \DeclareUnicodeCharacter{01F1}{DZ}
+ \DeclareUnicodeCharacter{01F2}{Dz}
+ \DeclareUnicodeCharacter{01F3}{dz}
+ \DeclareUnicodeCharacter{01F4}{\'G}
+ \DeclareUnicodeCharacter{01F5}{\'g}
+ \DeclareUnicodeCharacter{01F8}{\`N}
+ \DeclareUnicodeCharacter{01F9}{\`n}
+ \DeclareUnicodeCharacter{01FC}{\'{\AE}}
+ \DeclareUnicodeCharacter{01FD}{\'{\ae}}
+ \DeclareUnicodeCharacter{01FE}{\'{\O}}
+ \DeclareUnicodeCharacter{01FF}{\'{\o}}
+
+ \DeclareUnicodeCharacter{021E}{\v{H}}
+ \DeclareUnicodeCharacter{021F}{\v{h}}
+
+ \DeclareUnicodeCharacter{0226}{\dotaccent{A}}
+ \DeclareUnicodeCharacter{0227}{\dotaccent{a}}
+ \DeclareUnicodeCharacter{0228}{\cedilla{E}}
+ \DeclareUnicodeCharacter{0229}{\cedilla{e}}
+ \DeclareUnicodeCharacter{022E}{\dotaccent{O}}
+ \DeclareUnicodeCharacter{022F}{\dotaccent{o}}
+
+ \DeclareUnicodeCharacter{0232}{\=Y}
+ \DeclareUnicodeCharacter{0233}{\=y}
+ \DeclareUnicodeCharacter{0237}{\dotless{j}}
+
+ \DeclareUnicodeCharacter{1E02}{\dotaccent{B}}
+ \DeclareUnicodeCharacter{1E03}{\dotaccent{b}}
+ \DeclareUnicodeCharacter{1E04}{\udotaccent{B}}
+ \DeclareUnicodeCharacter{1E05}{\udotaccent{b}}
+ \DeclareUnicodeCharacter{1E06}{\ubaraccent{B}}
+ \DeclareUnicodeCharacter{1E07}{\ubaraccent{b}}
+ \DeclareUnicodeCharacter{1E0A}{\dotaccent{D}}
+ \DeclareUnicodeCharacter{1E0B}{\dotaccent{d}}
+ \DeclareUnicodeCharacter{1E0C}{\udotaccent{D}}
+ \DeclareUnicodeCharacter{1E0D}{\udotaccent{d}}
+ \DeclareUnicodeCharacter{1E0E}{\ubaraccent{D}}
+ \DeclareUnicodeCharacter{1E0F}{\ubaraccent{d}}
+
+ \DeclareUnicodeCharacter{1E1E}{\dotaccent{F}}
+ \DeclareUnicodeCharacter{1E1F}{\dotaccent{f}}
+
+ \DeclareUnicodeCharacter{1E20}{\=G}
+ \DeclareUnicodeCharacter{1E21}{\=g}
+ \DeclareUnicodeCharacter{1E22}{\dotaccent{H}}
+ \DeclareUnicodeCharacter{1E23}{\dotaccent{h}}
+ \DeclareUnicodeCharacter{1E24}{\udotaccent{H}}
+ \DeclareUnicodeCharacter{1E25}{\udotaccent{h}}
+ \DeclareUnicodeCharacter{1E26}{\"H}
+ \DeclareUnicodeCharacter{1E27}{\"h}
+
+ \DeclareUnicodeCharacter{1E30}{\'K}
+ \DeclareUnicodeCharacter{1E31}{\'k}
+ \DeclareUnicodeCharacter{1E32}{\udotaccent{K}}
+ \DeclareUnicodeCharacter{1E33}{\udotaccent{k}}
+ \DeclareUnicodeCharacter{1E34}{\ubaraccent{K}}
+ \DeclareUnicodeCharacter{1E35}{\ubaraccent{k}}
+ \DeclareUnicodeCharacter{1E36}{\udotaccent{L}}
+ \DeclareUnicodeCharacter{1E37}{\udotaccent{l}}
+ \DeclareUnicodeCharacter{1E3A}{\ubaraccent{L}}
+ \DeclareUnicodeCharacter{1E3B}{\ubaraccent{l}}
+ \DeclareUnicodeCharacter{1E3E}{\'M}
+ \DeclareUnicodeCharacter{1E3F}{\'m}
+
+ \DeclareUnicodeCharacter{1E40}{\dotaccent{M}}
+ \DeclareUnicodeCharacter{1E41}{\dotaccent{m}}
+ \DeclareUnicodeCharacter{1E42}{\udotaccent{M}}
+ \DeclareUnicodeCharacter{1E43}{\udotaccent{m}}
+ \DeclareUnicodeCharacter{1E44}{\dotaccent{N}}
+ \DeclareUnicodeCharacter{1E45}{\dotaccent{n}}
+ \DeclareUnicodeCharacter{1E46}{\udotaccent{N}}
+ \DeclareUnicodeCharacter{1E47}{\udotaccent{n}}
+ \DeclareUnicodeCharacter{1E48}{\ubaraccent{N}}
+ \DeclareUnicodeCharacter{1E49}{\ubaraccent{n}}
+
+ \DeclareUnicodeCharacter{1E54}{\'P}
+ \DeclareUnicodeCharacter{1E55}{\'p}
+ \DeclareUnicodeCharacter{1E56}{\dotaccent{P}}
+ \DeclareUnicodeCharacter{1E57}{\dotaccent{p}}
+ \DeclareUnicodeCharacter{1E58}{\dotaccent{R}}
+ \DeclareUnicodeCharacter{1E59}{\dotaccent{r}}
+ \DeclareUnicodeCharacter{1E5A}{\udotaccent{R}}
+ \DeclareUnicodeCharacter{1E5B}{\udotaccent{r}}
+ \DeclareUnicodeCharacter{1E5E}{\ubaraccent{R}}
+ \DeclareUnicodeCharacter{1E5F}{\ubaraccent{r}}
+
+ \DeclareUnicodeCharacter{1E60}{\dotaccent{S}}
+ \DeclareUnicodeCharacter{1E61}{\dotaccent{s}}
+ \DeclareUnicodeCharacter{1E62}{\udotaccent{S}}
+ \DeclareUnicodeCharacter{1E63}{\udotaccent{s}}
+ \DeclareUnicodeCharacter{1E6A}{\dotaccent{T}}
+ \DeclareUnicodeCharacter{1E6B}{\dotaccent{t}}
+ \DeclareUnicodeCharacter{1E6C}{\udotaccent{T}}
+ \DeclareUnicodeCharacter{1E6D}{\udotaccent{t}}
+ \DeclareUnicodeCharacter{1E6E}{\ubaraccent{T}}
+ \DeclareUnicodeCharacter{1E6F}{\ubaraccent{t}}
+
+ \DeclareUnicodeCharacter{1E7C}{\~V}
+ \DeclareUnicodeCharacter{1E7D}{\~v}
+ \DeclareUnicodeCharacter{1E7E}{\udotaccent{V}}
+ \DeclareUnicodeCharacter{1E7F}{\udotaccent{v}}
+
+ \DeclareUnicodeCharacter{1E80}{\`W}
+ \DeclareUnicodeCharacter{1E81}{\`w}
+ \DeclareUnicodeCharacter{1E82}{\'W}
+ \DeclareUnicodeCharacter{1E83}{\'w}
+ \DeclareUnicodeCharacter{1E84}{\"W}
+ \DeclareUnicodeCharacter{1E85}{\"w}
+ \DeclareUnicodeCharacter{1E86}{\dotaccent{W}}
+ \DeclareUnicodeCharacter{1E87}{\dotaccent{w}}
+ \DeclareUnicodeCharacter{1E88}{\udotaccent{W}}
+ \DeclareUnicodeCharacter{1E89}{\udotaccent{w}}
+ \DeclareUnicodeCharacter{1E8A}{\dotaccent{X}}
+ \DeclareUnicodeCharacter{1E8B}{\dotaccent{x}}
+ \DeclareUnicodeCharacter{1E8C}{\"X}
+ \DeclareUnicodeCharacter{1E8D}{\"x}
+ \DeclareUnicodeCharacter{1E8E}{\dotaccent{Y}}
+ \DeclareUnicodeCharacter{1E8F}{\dotaccent{y}}
+
+ \DeclareUnicodeCharacter{1E90}{\^Z}
+ \DeclareUnicodeCharacter{1E91}{\^z}
+ \DeclareUnicodeCharacter{1E92}{\udotaccent{Z}}
+ \DeclareUnicodeCharacter{1E93}{\udotaccent{z}}
+ \DeclareUnicodeCharacter{1E94}{\ubaraccent{Z}}
+ \DeclareUnicodeCharacter{1E95}{\ubaraccent{z}}
+ \DeclareUnicodeCharacter{1E96}{\ubaraccent{h}}
+ \DeclareUnicodeCharacter{1E97}{\"t}
+ \DeclareUnicodeCharacter{1E98}{\ringaccent{w}}
+ \DeclareUnicodeCharacter{1E99}{\ringaccent{y}}
+
+ \DeclareUnicodeCharacter{1EA0}{\udotaccent{A}}
+ \DeclareUnicodeCharacter{1EA1}{\udotaccent{a}}
+
+ \DeclareUnicodeCharacter{1EB8}{\udotaccent{E}}
+ \DeclareUnicodeCharacter{1EB9}{\udotaccent{e}}
+ \DeclareUnicodeCharacter{1EBC}{\~E}
+ \DeclareUnicodeCharacter{1EBD}{\~e}
+
+ \DeclareUnicodeCharacter{1ECA}{\udotaccent{I}}
+ \DeclareUnicodeCharacter{1ECB}{\udotaccent{i}}
+ \DeclareUnicodeCharacter{1ECC}{\udotaccent{O}}
+ \DeclareUnicodeCharacter{1ECD}{\udotaccent{o}}
+
+ \DeclareUnicodeCharacter{1EE4}{\udotaccent{U}}
+ \DeclareUnicodeCharacter{1EE5}{\udotaccent{u}}
+
+ \DeclareUnicodeCharacter{1EF2}{\`Y}
+ \DeclareUnicodeCharacter{1EF3}{\`y}
+ \DeclareUnicodeCharacter{1EF4}{\udotaccent{Y}}
+
+ \DeclareUnicodeCharacter{1EF8}{\~Y}
+ \DeclareUnicodeCharacter{1EF9}{\~y}
+
+ \DeclareUnicodeCharacter{2013}{--}
+ \DeclareUnicodeCharacter{2014}{---}
+ \DeclareUnicodeCharacter{2018}{\quoteleft}
+ \DeclareUnicodeCharacter{2019}{\quoteright}
+ \DeclareUnicodeCharacter{201A}{\quotesinglbase}
+ \DeclareUnicodeCharacter{201C}{\quotedblleft}
+ \DeclareUnicodeCharacter{201D}{\quotedblright}
+ \DeclareUnicodeCharacter{201E}{\quotedblbase}
+ \DeclareUnicodeCharacter{2022}{\bullet}
+ \DeclareUnicodeCharacter{2026}{\dots}
+ \DeclareUnicodeCharacter{2039}{\guilsinglleft}
+ \DeclareUnicodeCharacter{203A}{\guilsinglright}
+ \DeclareUnicodeCharacter{20AC}{\euro}
+
+ \DeclareUnicodeCharacter{2192}{\expansion}
+ \DeclareUnicodeCharacter{21D2}{\result}
+
+ \DeclareUnicodeCharacter{2212}{\minus}
+ \DeclareUnicodeCharacter{2217}{\point}
+ \DeclareUnicodeCharacter{2261}{\equiv}
+}% end of \utfeightchardefs
+
+
+% US-ASCII character definitions.
+\def\asciichardefs{% nothing need be done
+ \relax
+}
+
+% Make non-ASCII characters printable again for compatibility with
+% existing Texinfo documents that may use them, even without declaring a
+% document encoding.
+%
+\setnonasciicharscatcode \other
+
+
+\message{formatting,}
+
+\newdimen\defaultparindent \defaultparindent = 15pt
+
+\chapheadingskip = 15pt plus 4pt minus 2pt
+\secheadingskip = 12pt plus 3pt minus 2pt
+\subsecheadingskip = 9pt plus 2pt minus 2pt
+
+% Prevent underfull vbox error messages.
+\vbadness = 10000
+
+% Don't be so finicky about underfull hboxes, either.
+\hbadness = 2000
+
+% Following George Bush, get rid of widows and orphans.
+\widowpenalty=10000
+\clubpenalty=10000
+
+% Use TeX 3.0's \emergencystretch to help line breaking, but if we're
+% using an old version of TeX, don't do anything. We want the amount of
+% stretch added to depend on the line length, hence the dependence on
+% \hsize. We call this whenever the paper size is set.
+%
+\def\setemergencystretch{%
+ \ifx\emergencystretch\thisisundefined
+ % Allow us to assign to \emergencystretch anyway.
+ \def\emergencystretch{\dimen0}%
+ \else
+ \emergencystretch = .15\hsize
+ \fi
+}
+
+% Parameters in order: 1) textheight; 2) textwidth;
+% 3) voffset; 4) hoffset; 5) binding offset; 6) topskip;
+% 7) physical page height; 8) physical page width.
+%
+% We also call \setleading{\textleading}, so the caller should define
+% \textleading. The caller should also set \parskip.
+%
+\def\internalpagesizes#1#2#3#4#5#6#7#8{%
+ \voffset = #3\relax
+ \topskip = #6\relax
+ \splittopskip = \topskip
+ %
+ \vsize = #1\relax
+ \advance\vsize by \topskip
+ \outervsize = \vsize
+ \advance\outervsize by 2\topandbottommargin
+ \pageheight = \vsize
+ %
+ \hsize = #2\relax
+ \outerhsize = \hsize
+ \advance\outerhsize by 0.5in
+ \pagewidth = \hsize
+ %
+ \normaloffset = #4\relax
+ \bindingoffset = #5\relax
+ %
+ \ifpdf
+ \pdfpageheight #7\relax
+ \pdfpagewidth #8\relax
+ % if we don't reset these, they will remain at "1 true in" of
+ % whatever layout pdftex was dumped with.
+ \pdfhorigin = 1 true in
+ \pdfvorigin = 1 true in
+ \fi
+ %
+ \setleading{\textleading}
+ %
+ \parindent = \defaultparindent
+ \setemergencystretch
+}
+
+% @letterpaper (the default).
+\def\letterpaper{{\globaldefs = 1
+ \parskip = 3pt plus 2pt minus 1pt
+ \textleading = 13.2pt
+ %
+ % If page is nothing but text, make it come out even.
+ \internalpagesizes{607.2pt}{6in}% that's 46 lines
+ {\voffset}{.25in}%
+ {\bindingoffset}{36pt}%
+ {11in}{8.5in}%
+}}
+
+% Use @smallbook to reset parameters for 7x9.25 trim size.
+\def\smallbook{{\globaldefs = 1
+ \parskip = 2pt plus 1pt
+ \textleading = 12pt
+ %
+ \internalpagesizes{7.5in}{5in}%
+ {-.2in}{0in}%
+ {\bindingoffset}{16pt}%
+ {9.25in}{7in}%
+ %
+ \lispnarrowing = 0.3in
+ \tolerance = 700
+ \hfuzz = 1pt
+ \contentsrightmargin = 0pt
+ \defbodyindent = .5cm
+}}
+
+% Use @smallerbook to reset parameters for 6x9 trim size.
+% (Just testing, parameters still in flux.)
+\def\smallerbook{{\globaldefs = 1
+ \parskip = 1.5pt plus 1pt
+ \textleading = 12pt
+ %
+ \internalpagesizes{7.4in}{4.8in}%
+ {-.2in}{-.4in}%
+ {0pt}{14pt}%
+ {9in}{6in}%
+ %
+ \lispnarrowing = 0.25in
+ \tolerance = 700
+ \hfuzz = 1pt
+ \contentsrightmargin = 0pt
+ \defbodyindent = .4cm
+}}
+
+% Use @afourpaper to print on European A4 paper.
+\def\afourpaper{{\globaldefs = 1
+ \parskip = 3pt plus 2pt minus 1pt
+ \textleading = 13.2pt
+ %
+ % Double-side printing via postscript on Laserjet 4050
+ % prints double-sided nicely when \bindingoffset=10mm and \hoffset=-6mm.
+ % To change the settings for a different printer or situation, adjust
+ % \normaloffset until the front-side and back-side texts align. Then
+ % do the same for \bindingoffset. You can set these for testing in
+ % your texinfo source file like this:
+ % @tex
+ % \global\normaloffset = -6mm
+ % \global\bindingoffset = 10mm
+ % @end tex
+ \internalpagesizes{673.2pt}{160mm}% that's 51 lines
+ {\voffset}{\hoffset}%
+ {\bindingoffset}{44pt}%
+ {297mm}{210mm}%
+ %
+ \tolerance = 700
+ \hfuzz = 1pt
+ \contentsrightmargin = 0pt
+ \defbodyindent = 5mm
+}}
+
+% Use @afivepaper to print on European A5 paper.
+% From romildo@urano.iceb.ufop.br, 2 July 2000.
+% He also recommends making @example and @lisp be small.
+\def\afivepaper{{\globaldefs = 1
+ \parskip = 2pt plus 1pt minus 0.1pt
+ \textleading = 12.5pt
+ %
+ \internalpagesizes{160mm}{120mm}%
+ {\voffset}{\hoffset}%
+ {\bindingoffset}{8pt}%
+ {210mm}{148mm}%
+ %
+ \lispnarrowing = 0.2in
+ \tolerance = 800
+ \hfuzz = 1.2pt
+ \contentsrightmargin = 0pt
+ \defbodyindent = 2mm
+ \tableindent = 12mm
+}}
+
+% A specific text layout, 24x15cm overall, intended for A4 paper.
+\def\afourlatex{{\globaldefs = 1
+ \afourpaper
+ \internalpagesizes{237mm}{150mm}%
+ {\voffset}{4.6mm}%
+ {\bindingoffset}{7mm}%
+ {297mm}{210mm}%
+ %
+ % Must explicitly reset to 0 because we call \afourpaper.
+ \globaldefs = 0
+}}
+
+% Use @afourwide to print on A4 paper in landscape format.
+\def\afourwide{{\globaldefs = 1
+ \afourpaper
+ \internalpagesizes{241mm}{165mm}%
+ {\voffset}{-2.95mm}%
+ {\bindingoffset}{7mm}%
+ {297mm}{210mm}%
+ \globaldefs = 0
+}}
+
+% @pagesizes TEXTHEIGHT[,TEXTWIDTH]
+% Perhaps we should allow setting the margins, \topskip, \parskip,
+% and/or leading, also. Or perhaps we should compute them somehow.
+%
+\parseargdef\pagesizes{\pagesizesyyy #1,,\finish}
+\def\pagesizesyyy#1,#2,#3\finish{{%
+ \setbox0 = \hbox{\ignorespaces #2}\ifdim\wd0 > 0pt \hsize=#2\relax \fi
+ \globaldefs = 1
+ %
+ \parskip = 3pt plus 2pt minus 1pt
+ \setleading{\textleading}%
+ %
+ \dimen0 = #1\relax
+ \advance\dimen0 by \voffset
+ %
+ \dimen2 = \hsize
+ \advance\dimen2 by \normaloffset
+ %
+ \internalpagesizes{#1}{\hsize}%
+ {\voffset}{\normaloffset}%
+ {\bindingoffset}{44pt}%
+ {\dimen0}{\dimen2}%
+}}
+
+% Set default to letter.
+%
+\letterpaper
+
+
+\message{and turning on texinfo input format.}
+
+% Define macros to output various characters with catcode for normal text.
+\catcode`\"=\other
+\catcode`\~=\other
+\catcode`\^=\other
+\catcode`\_=\other
+\catcode`\|=\other
+\catcode`\<=\other
+\catcode`\>=\other
+\catcode`\+=\other
+\catcode`\$=\other
+\def\normaldoublequote{"}
+\def\normaltilde{~}
+\def\normalcaret{^}
+\def\normalunderscore{_}
+\def\normalverticalbar{|}
+\def\normalless{<}
+\def\normalgreater{>}
+\def\normalplus{+}
+\def\normaldollar{$}%$ font-lock fix
+
+% This macro is used to make a character print one way in \tt
+% (where it can probably be output as-is), and another way in other fonts,
+% where something hairier probably needs to be done.
+%
+% #1 is what to print if we are indeed using \tt; #2 is what to print
+% otherwise. Since all the Computer Modern typewriter fonts have zero
+% interword stretch (and shrink), and it is reasonable to expect all
+% typewriter fonts to have this, we can check that font parameter.
+%
+\def\ifusingtt#1#2{\ifdim \fontdimen3\font=0pt #1\else #2\fi}
+
+% Same as above, but check for italic font. Actually this also catches
+% non-italic slanted fonts since it is impossible to distinguish them from
+% italic fonts. But since this is only used by $ and it uses \sl anyway
+% this is not a problem.
+\def\ifusingit#1#2{\ifdim \fontdimen1\font>0pt #1\else #2\fi}
+
+% Turn off all special characters except @
+% (and those which the user can use as if they were ordinary).
+% Most of these we simply print from the \tt font, but for some, we can
+% use math or other variants that look better in normal text.
+
+\catcode`\"=\active
+\def\activedoublequote{{\tt\char34}}
+\let"=\activedoublequote
+\catcode`\~=\active
+\def~{{\tt\char126}}
+\chardef\hat=`\^
+\catcode`\^=\active
+\def^{{\tt \hat}}
+
+\catcode`\_=\active
+\def_{\ifusingtt\normalunderscore\_}
+\let\realunder=_
+% Subroutine for the previous macro.
+\def\_{\leavevmode \kern.07em \vbox{\hrule width.3em height.1ex}\kern .07em }
+
+\catcode`\|=\active
+\def|{{\tt\char124}}
+\chardef \less=`\<
+\catcode`\<=\active
+\def<{{\tt \less}}
+\chardef \gtr=`\>
+\catcode`\>=\active
+\def>{{\tt \gtr}}
+\catcode`\+=\active
+\def+{{\tt \char 43}}
+\catcode`\$=\active
+\def${\ifusingit{{\sl\$}}\normaldollar}%$ font-lock fix
+
+% If a .fmt file is being used, characters that might appear in a file
+% name cannot be active until we have parsed the command line.
+% So turn them off again, and have \everyjob (or @setfilename) turn them on.
+% \otherifyactive is called near the end of this file.
+\def\otherifyactive{\catcode`+=\other \catcode`\_=\other}
+
+% Used sometimes to turn off (effectively) the active characters even after
+% parsing them.
+\def\turnoffactive{%
+ \normalturnoffactive
+ \otherbackslash
+}
+
+\catcode`\@=0
+
+% \backslashcurfont outputs one backslash character in current font,
+% as in \char`\\.
+\global\chardef\backslashcurfont=`\\
+\global\let\rawbackslashxx=\backslashcurfont % let existing .??s files work
+
+% \realbackslash is an actual character `\' with catcode other, and
+% \doublebackslash is two of them (for the pdf outlines).
+{\catcode`\\=\other @gdef@realbackslash{\} @gdef@doublebackslash{\\}}
+
+% In texinfo, backslash is an active character; it prints the backslash
+% in fixed width font.
+\catcode`\\=\active
+@def@normalbackslash{{@tt@backslashcurfont}}
+% On startup, @fixbackslash assigns:
+% @let \ = @normalbackslash
+
+% \rawbackslash defines an active \ to do \backslashcurfont.
+% \otherbackslash defines an active \ to be a literal `\' character with
+% catcode other.
+@gdef@rawbackslash{@let\=@backslashcurfont}
+@gdef@otherbackslash{@let\=@realbackslash}
+
+% Same as @turnoffactive except outputs \ as {\tt\char`\\} instead of
+% the literal character `\'.
+%
+@def@normalturnoffactive{%
+ @let\=@normalbackslash
+ @let"=@normaldoublequote
+ @let~=@normaltilde
+ @let^=@normalcaret
+ @let_=@normalunderscore
+ @let|=@normalverticalbar
+ @let<=@normalless
+ @let>=@normalgreater
+ @let+=@normalplus
+ @let$=@normaldollar %$ font-lock fix
+ @unsepspaces
+}
+
+% Make _ and + \other characters, temporarily.
+% This is canceled by @fixbackslash.
+@otherifyactive
+
+% If a .fmt file is being used, we don't want the `\input texinfo' to show up.
+% That is what \eatinput is for; after that, the `\' should revert to printing
+% a backslash.
+%
+@gdef@eatinput input texinfo{@fixbackslash}
+@global@let\ = @eatinput
+
+% On the other hand, perhaps the file did not have a `\input texinfo'. Then
+% the first `\' in the file would cause an error. This macro tries to fix
+% that, assuming it is called before the first `\' could plausibly occur.
+% Also turn back on active characters that might appear in the input
+% file name, in case not using a pre-dumped format.
+%
+@gdef@fixbackslash{%
+ @ifx\@eatinput @let\ = @normalbackslash @fi
+ @catcode`+=@active
+ @catcode`@_=@active
+}
+
+% Say @foo, not \foo, in error messages.
+@escapechar = `@@
+
+% These look ok in all fonts, so just make them not special.
+@catcode`@& = @other
+@catcode`@# = @other
+@catcode`@% = @other
+
+
+@c Local variables:
+@c eval: (add-hook 'write-file-hooks 'time-stamp)
+@c page-delimiter: "^\\\\message"
+@c time-stamp-start: "def\\\\texinfoversion{"
+@c time-stamp-format: "%:y-%02m-%02d.%02H"
+@c time-stamp-end: "}"
+@c End:
+
+@c vim:sw=2:
+
+@ignore
+ arch-tag: e1b36e32-c96e-4135-a41a-0b2efa2ea115
+@end ignore
diff --git a/doc/uiserver.texi b/doc/uiserver.texi
new file mode 100644
index 0000000..f3cd8ad
--- /dev/null
+++ b/doc/uiserver.texi
@@ -0,0 +1,612 @@
+@c uiserver.texi -*- mode: texinfo; coding: latin-1; -*-
+@c Specification of the UI server protocol.
+@c To be included by gpgme.texi
+
+@node UI Server Protocol
+@appendix The GnuPG UI Server Protocol
+@cindex UI server
+@cindex user interface server
+
+
+This section specifies the protocol used between clients and a User
+Interface Server (UI server). This protocol helps to build a system
+where all cryptographic operations are done by a server and the server
+is responsible for all dialogs. Although @acronym{GPGME} has no direct
+support for this protocol it is believed that servers will utilize the
+@acronym{GPGME} library; thus having the specification included in this
+manual is an appropriate choice. This protocol should be referenced as
+`The GnuPG UI Server Protocol'.
+
+@noindent
+A server needs to implement these commands:@footnote{In all examples we
+assume that the connection has already been established; see the Assuan
+manual for details.}
+
+@menu
+* UI Server Encrypt:: Encrypt a message.
+* UI Server Sign:: Sign a message.
+* UI Server Decrypt:: Decrypt a message.
+* UI Server Verify:: Verify a message.
+* UI Server Set Input Files:: Specifying the input files to operate on.
+* UI Server Sign/Encrypt Files:: Encrypting and signing files.
+* UI Server Verify/Decrypt Files:: Decrypting and verifying files.
+* UI Server Import/Export Keys:: Managing certificates.
+* UI Server Checksum Files:: Create and verify checksums for files.
+* Miscellaneous UI Server Commands:: Commands not related to a specific operation.
+@end menu
+
+
+
+@node UI Server Encrypt
+@section UI Server: Encrypt a Message
+
+Before encryption can be done the recipients must be set using the
+command:
+
+@deffn Command RECIPIENT @var{string}
+
+Set the recipient for the encryption. @var{string} is an RFC-2822
+recipient name ("mailbox" as per section 3.4). This command may or may
+not check the recipient for validity right away; if it does not all
+recipients are expected to be checked at the time of the @code{ENCRYPT}
+command. All @code{RECIPIENT} commands are cumulative until a
+successful @code{ENCRYPT} command or until a @code{RESET} command.
+Linefeeds are obviously not allowed in @var{string} and should be folded
+into spaces (which are equivalent).
+@end deffn
+
+@noindent
+To tell the server the source and destination of the data, the next two
+commands are to be used:
+
+@deffn Command INPUT FD=@var{n}
+Set the file descriptor for the message to be encrypted to @var{n}. The
+message send to the server is binary encoded.
+
+GpgOL is a Windows only program, thus @var{n} is not a libc file
+descriptor but a regular system handle. Given that the Assuan
+connection works over a socket, it is not possible to use regular
+inheritance to make the file descriptor available to the server.
+Thus @code{DuplicateHandle} needs to be used to duplicate a handle
+to the server process. This is the reason that the server needs to
+implement the @code{GETINFO pid} command. Sending this command a second
+time replaces the file descriptor set by the last one.
+@c If @var{n} is not given, this commands uses the
+@c %last file descriptor passed to the application.
+@c %@xref{fun-assuan_sendfd, ,the assuan_sendfd function,assuan,the
+@c %Libassuan manual}, on how to do descriptor passing.
+@end deffn
+
+@deffn Command OUTPUT FD=@var{n}
+Set the file descriptor to be used for the output (i.e. the encrypted
+message) to @var{n}. For OpenPGP, the output needs to be ASCII armored;
+for CMS, the output needs to be Base-64 encoded. For details on the
+file descriptor, see the @code{INPUT} command.
+@end deffn
+
+@noindent
+The setting of the recipients, the data source and destination may
+happen in any order, even intermixed. If this has been done the actual
+encryption operation is called using:
+
+@deffn Command ENCRYPT -@w{}-protocol=@var{name}
+
+This command reads the plaintext from the file descriptor set by the
+@code{INPUT} command, encrypts it and writes the ciphertext to the file
+descriptor set by the @code{OUTPUT} command. The server may (and
+should) overlap reading and writing. The recipients used for the
+encryption are all the recipients set so far. If any recipient is not
+usable the server should take appropriate measures to notify the user
+about the problem and may cancel the operation by returning an error
+code. The used file descriptors are void after this command; the
+recipient list is only cleared if the server returns success.
+
+@noindent
+Because GpgOL uses a streaming mode of operation the server is not
+allowed to auto select the protocol and must obey to the mandatory
+@var{protocol} parameter:
+
+@table @code
+@item OpenPGP
+Use the OpenPGP protocol (RFC-2440).
+@item CMS
+Use the CMS (PKCS#7) protocol (RFC-3852).
+@end table
+
+@end deffn
+
+To support automagically selection of the protocol depending on the
+selected keys, the server MAY implement the command:
+
+@deffn Command PREP_ENCRYPT [-@w{}-protocol=@var{name}] [-@w{}-expect-sign]
+
+This commands considers all recipients set so far and decides whether it
+is able to take input and start the actual encryption. This is kind of
+a dry-run @command{ENCRYPT} without requiring or using the input and
+output file descriptors. The server shall cache the result of any user
+selection to avoid asking this again when the actual @command{ENCRYPT}
+command is send. The @option{--protocol} option is optional; if it is
+not given, the server should allow the user to select the protocol to be
+used based on the recipients given or by any other means.
+
+If @option{--expect-sign} is given the server should expect that the
+message will also be signed and use this hint to present a unified
+recipient and signer selection dialog if possible and desired. A
+selected signer should then be cached for the expected SIGN command
+(which is expected in the same session but possible on another
+connection).
+
+If this command is given again before a successful @command{ENCRYPT}
+command, the second one takes effect.
+
+Before sending the OK response the server shall tell the client the
+protocol to be used (either the one given by the argument or the one
+selected by the user) by means of a status line:
+@end deffn
+
+@deffn {Status line} PROTOCOL @var{name}
+Advise the client to use the protocol @var{name} for the
+@command{ENCRYPT} command. The valid protocol names are listed under
+the description of the @command{ENCRYPT} command. The server shall emit
+exactly one PROTOCOL status line.
+@end deffn
+
+@noindent
+Here is an example of a complete encryption sequence; client lines are
+indicated by a @sc{c:}, server responses by @sc{c:}:
+
+@smallexample
+@group
+ @clnt RESET
+ @srvr OK
+ @clnt RECIPIENT foo@@example.net
+ @srvr OK
+ @clnt RECIPIENT bar@@example.com
+ @srvr OK
+ @clnt PREP_ENCRYPT
+ @srvr S PROTOCOL OpenPGP
+ @srvr OK
+ @clnt INPUT FD=17
+ @srvr OK
+ @clnt OUTPUT FD=18
+ @srvr OK
+ @clnt ENCRYPT
+ @srvr OK
+@end group
+@end smallexample
+
+
+
+@node UI Server Sign
+@section UI Server: Sign a Message
+
+The server needs to implement opaque signing as well as detached
+signing. Due to the nature of OpenPGP messages it is always required to
+send the entire message to the server; sending just the hash is not
+possible. The following two commands are required to set the input and
+output file descriptors:
+
+@deffn Command INPUT FD=@var{n}
+Set the file descriptor for the message to be signed to @var{n}. The
+message send to the server is binary encoded. For details on the file
+descriptor, see the description of @code{INPUT} in the @code{ENCRYPT}
+section.
+@end deffn
+
+@deffn Command OUTPUT FD=@var{n}
+Set the file descriptor to be used for the output. The output is either
+the complete signed message or in case of a detached signature just that
+detached signature. For OpenPGP, the output needs to be ASCII armored;
+for CMS, the output needs to be Base-64 encoded. For details on the
+file descriptor, see the @code{INPUT} command.
+@end deffn
+
+@noindent
+To allow the server the selection of a non-default signing key the
+client may optionally use the @code{SENDER} command, see @ref{command
+SENDER}.
+
+@noindent
+The signing operation is then initiated by:
+
+@deffn Command SIGN -@w{}-protocol=@var{name} [-@w{}-detached]
+Sign the data set with the @code{INPUT} command and write it to the sink
+set by OUTPUT. @var{name} is the signing protocol used for the
+message. For a description of the allowed protocols see the
+@code{ENCRYPT} command. With option @code{--detached} given, a detached
+signature is created; this is actually the usual way the command is
+used.
+@end deffn
+
+@noindent
+The client expects the server to send at least this status information
+before the final OK response:
+
+@deffn {Status line} MICALG @var{string}
+The @var{string} represents the hash algorithm used to create the
+signature. It is used with MOSS style signature messages and defined by
+PGP/MIME (RFC-3156) and S/MIME (RFC-3851). The GPGME library has a
+supporting function @code{gpgme_hash_algo_name} to return the algorithm
+name as a string. This string needs to be lowercased and for OpenPGP
+prefixed with "@code{pgp-}".
+@end deffn
+
+
+
+@node UI Server Decrypt
+@section UI Server: Decrypt a Message
+
+Decryption may include the verification of OpenPGP messages. This is
+due to the often used combined signing/encryption modus of OpenPGP. The
+client may pass an option to the server to inhibit the signature
+verification. The following two commands are required to set the input
+and output file descriptors:
+
+@deffn Command INPUT FD=@var{n}
+Set the file descriptor for the message to be decrypted to @var{n}. The
+message send to the server is either binary encoded or --- in the case
+of OpenPGP --- ASCII armored. For details on the file descriptor, see
+the description of @code{INPUT} in the @code{ENCRYPT} section.
+@end deffn
+
+@deffn Command OUTPUT FD=@var{n}
+Set the file descriptor to be used for the output. The output is binary
+encoded. For details on the file descriptor, see the description of
+@code{INPUT} in the @code{ENCRYPT} section.
+@end deffn
+
+@noindent
+The decryption is started with the command:
+
+@deffn Command DECRYPT -@w{}-protocol=@var{name} [-@w{}-no-verify]
+@var{name} is the encryption protocol used for the message. For a
+description of the allowed protocols see the @code{ENCRYPT} command.
+This argument is mandatory. If the option @option{--no-verify} is given,
+the server should not try to verify a signature, in case the input data
+is an OpenPGP combined message.
+@end deffn
+
+
+@node UI Server Verify
+@section UI Server: Verify a Message
+
+The server needs to support the verification of opaque signatures as
+well as detached signatures. The kind of input sources controls what
+kind message is to be verified.
+
+@deffn Command MESSAGE FD=@var{n}
+This command is used with detached signatures to set the file descriptor
+for the signed data to @var{n}. The data is binary encoded (used
+verbatim). For details on the file descriptor, see the description of
+@code{INPUT} in the @code{ENCRYPT} section.
+@end deffn
+
+@deffn Command INPUT FD=@var{n}
+Set the file descriptor for the opaque message or the signature part of
+a detached signature to @var{n}. The message send to the server is
+either binary encoded or -- in the case of OpenPGP -- ASCII armored.
+For details on the file descriptor, see the description of @code{INPUT}
+in the @code{ENCRYPT} section.
+@end deffn
+
+@deffn Command OUTPUT FD=@var{n}
+Set the file descriptor to be used for the output. The output is binary
+encoded and only used for opaque signatures. For details on the file
+descriptor, see the description of @code{INPUT} in the @code{ENCRYPT}
+section.
+@end deffn
+
+@noindent
+The verification is then started using:
+
+@deffn Command VERIFY -@w{}-protocol=@var{name} [-@w{}-silent]
+@var{name} is the signing protocol used for the message. For a
+description of the allowed protocols see the @code{ENCRYPT} command.
+This argument is mandatory. Depending on the combination of
+@code{MESSAGE} @code{INPUT} and @code{OUTPUT} commands, the server needs
+to select the appropriate verification mode:
+
+@table @asis
+@item MESSAGE and INPUT
+This indicates a detached signature. Output data is not applicable.
+@item INPUT
+This indicates an opaque signature. As no output command has been given,
+the server is only required to check the signature.
+@item INPUT and OUTPUT
+This indicates an opaque signature. The server shall write the signed
+data to the file descriptor set by the output command. This data shall
+even be written if the signatures can't be verified.
+@end table
+@end deffn
+
+With @option{--silent} the server shall not display any dialog; this is
+for example used by the client to get the content of opaque signed
+messages. The client expects the server to send at least this status
+information before the final OK response:
+
+@deffn {Status line} SIGSTATUS @var{flag} @var{displaystring}
+Returns the status for the signature and a short string explaining the
+status. Valid values for @var{flag} are:
+
+@table @code
+@item none
+The message has a signature but it could not not be verified due to a
+missing key.
+@item green
+The signature is fully valid.
+@item yellow
+The signature is valid but additional information was shown regarding the
+validity of the key.
+@item red
+The signature is not valid.
+@end table
+
+@var{displaystring} is a percent-and-plus-encoded string with a short
+human readable description of the status. For example
+
+@smallexample
+S SIGSTATUS green Good+signature+from+Keith+Moon+<keith@@example.net>
+@end smallexample
+
+Note that this string needs to fit into an Assuan line and should be
+short enough to be displayed as short one-liner on the clients window.
+As usual the encoding of this string is UTF-8 and it should be send in
+its translated form.
+
+The server shall send one status line for every signature found on the
+message.
+
+
+@end deffn
+
+
+@node UI Server Set Input Files
+@section UI Server: Specifying the input files to operate on.
+
+All file related UI server commands operate on a number of input files
+or directories, specified by one or more @code{FILE} commands:
+
+@deffn Command FILE @var{name} [--continued]
+Add the file or directory @var{name} to the list of pathnames to be
+processed by the server. The parameter @var{name} must be an absolute
+path name (including the drive letter) and is percent espaced (in
+particular, the characters %, = and white space characters are always
+escaped). The option @code{--continued} is present for all but the
+last @code{FILE} command.
+@end deffn
+
+
+@node UI Server Sign/Encrypt Files
+@section UI Server: Encrypting and signing files.
+
+First, the input files need to be specified by one or more
+@code{FILE} commands. Afterwards, the actual operation is requested:
+
+@deffn Command ENCRYPT_FILES --nohup
+@deffnx Command SIGN_FILES --nohup
+@deffnx Command ENCRYPT_SIGN_FILES --nohup
+Request that the files specified by @code{FILE} are encrypted and/or
+signed. The command selects the default action. The UI server may
+allow the user to change this default afterwards interactively, and
+even abort the operation or complete it only on some of the selected
+files and directories.
+
+What it means to encrypt or sign a file or directory is specific to
+the preferences of the user, the functionality the UI server provides,
+and the selected protocol. Typically, for each input file a new file
+is created under the original filename plus a protocol specific
+extension (like @code{.gpg} or @code{.sig}), which contain the
+encrypted/signed file or a detached signature. For directories, the
+server may offer multiple options to the user (for example ignore or
+process recursively).
+
+The @code{ENCRYPT_SIGN_FILES} command requests a combined sign and
+encrypt operation. It may not be available for all protocols (for
+example, it is available for OpenPGP but not for CMS).
+
+The option @code{--nohup} is mandatory. It is currently unspecified
+what should happen if @code{--nohup} is not present. Because
+@code{--nohup} is present, the server always returns @code{OK}
+promptly, and completes the operation asynchronously.
+@end deffn
+
+
+@node UI Server Verify/Decrypt Files
+@section UI Server: Decrypting and verifying files.
+
+First, the input files need to be specified by one or more
+@code{FILE} commands. Afterwards, the actual operation is requested:
+
+@deffn Command DECRYPT_FILES --nohup
+@deffnx Command VERIFY_FILES --nohup
+@deffnx Command DECRYPT_VERIFY_FILES --nohup
+Request that the files specified by @code{FILE} are decrypted and/or
+verified. The command selects the default action. The UI server may
+allow the user to change this default afterwards interactively, and
+even abort the operation or complete it only on some of the selected
+files and directories.
+
+What it means to decrypt or verify a file or directory is specific to
+the preferences of the user, the functionality the UI server provides,
+and the selected protocol. Typically, for decryption, a new file is
+created for each input file under the original filename minus a
+protocol specific extension (like @code{.gpg}) which contains the
+original plaintext. For verification a status is displayed for each
+signed input file, indicating if it is signed, and if yes, if the
+signature is valid. For files that are signed and encrypted, the
+@code{VERIFY} command transiently decrypts the file to verify the
+enclosed signature. For directories, the server may offer multiple
+options to the user (for example ignore or process recursively).
+
+The option @code{--nohup} is mandatory. It is currently unspecified
+what should happen if @code{--nohup} is not present. Because
+@code{--nohup} is present, the server always returns @code{OK}
+promptly, and completes the operation asynchronously.
+@end deffn
+
+
+@node UI Server Import/Export Keys
+@section UI Server: Managing certificates.
+
+First, the input files need to be specified by one or more
+@code{FILE} commands. Afterwards, the actual operation is requested:
+
+@deffn Command IMPORT_FILES --nohup
+Request that the certificates contained in the files specified by
+@code{FILE} are imported into the local certificate databases.
+
+For directories, the server may offer multiple options to the user
+(for example ignore or process recursively).
+
+The option @code{--nohup} is mandatory. It is currently unspecified
+what should happen if @code{--nohup} is not present. Because
+@code{--nohup} is present, the server always returns @code{OK}
+promptly, and completes the operation asynchronously.
+@end deffn
+
+FIXME: It may be nice to support an @code{EXPORT} command as well,
+which is enabled by the context menu of the background of a directory.
+
+
+@node UI Server Checksum Files
+@section UI Server: Create and verify checksums for files.
+
+First, the input files need to be specified by one or more
+@code{FILE} commands. Afterwards, the actual operation is requested:
+
+@deffn Command CHECKSUM_CREATE_FILES --nohup
+Request that checksums are created for the files specifed by
+@code{FILE}. The choice of checksum algorithm and the destination
+storage and format for the created checksums depend on the preferences
+of the user and the functionality provided by the UI server. For
+directories, the server may offer multiple options to the user (for
+example ignore or process recursively).
+
+The option @code{--nohup} is mandatory. It is currently unspecified
+what should happen if @code{--nohup} is not present. Because
+@code{--nohup} is present, the server always returns @code{OK}
+promptly, and completes the operation asynchronously.
+@end deffn
+
+
+@deffn Command CHECKSUM_VERIFY_FILES --nohup
+Request that checksums are created for the files specifed by
+@code{FILE} and verified against previously created and stored
+checksums. The choice of checksum algorithm and the source storage
+and format for previously created checksums depend on the preferences
+of the user and the functionality provided by the UI server. For
+directories, the server may offer multiple options to the user (for
+example ignore or process recursively).
+
+If the source storage of previously created checksums is available to
+the user through the Windows shell, this command may also accept such
+checksum files as @code{FILE} arguments. In this case, the UI server
+should instead verify the checksum of the referenced files as if they
+were given as INPUT files.
+
+The option @code{--nohup} is mandatory. It is currently unspecified
+what should happen if @code{--nohup} is not present. Because
+@code{--nohup} is present, the server always returns @code{OK}
+promptly, and completes the operation asynchronously.
+@end deffn
+
+
+
+
+@c
+@c M I S C E L L A N E O U S C O M M A N D S
+@c
+@node Miscellaneous UI Server Commands
+@section Miscellaneous UI Server Commands
+
+The server needs to implement the following commands which are not
+related to a specific command:
+
+@deffn Command GETINFO @var{what}
+This is a multi purpose command, commonly used to return a variety of
+information. The required subcommands as described by the @var{what}
+parameter are:
+
+@table @code
+@item pid
+Return the process id of the server in decimal notation using an Assuan
+data line.
+@end table
+@end deffn
+
+
+@noindent
+To allow the server to pop up the windows in the correct relation to the
+client, the client is advised to tell the server by sending the option:
+
+@deffn {Command option} window-id @var{number}
+The @var{number} represents the native window ID of the clients current
+window. On Windows systems this is a windows handle (@code{HWND}) and
+on X11 systems it is the @code{X Window ID}. The number needs to be
+given as a hexadecimal value so that it is easier to convey pointer
+values (e.g. @code{HWND}).
+@end deffn
+
+
+@noindent
+A client may want to fire up the certificate manager of the server. To
+do this it uses the Assuan command:
+
+@deffn Command START_KEYMANAGER
+The server shall pop up the main window of the key manager (aka
+certificate manager). The client expects that the key manager is brought
+into the foregound and that this command immediatley returns (does not
+wait until the key manager has been fully brought up).
+@end deffn
+
+@noindent
+A client may want to fire up the configuration dialog of the server. To
+do this it uses the Assuan command:
+
+@deffn Command START_CONFDIALOG
+The server shall pop up its configuration dialog. The client expects
+that this dialog is brought into the foregound and that this command
+immediatley returns (i.e. it does not wait until the dialog has been
+fully brought up).
+@end deffn
+
+@anchor{command SENDER}
+@noindent
+When doing an operation on a mail, it is useful to let the server know
+the address of the sender:
+
+@deffn Command SENDER [-@w{}-info] [-@w{}-protocol=@var{name}] @var{email}
+@var{email} is the plain ASCII encoded address ("addr-spec" as per
+RFC-2822) enclosed in angle brackets. The address set with this command
+is valid until a successful completion of the operation or until a
+@code{RESET} command. A second command overrides the effect of the
+first one; if @var{email} is not given and @option{--info} is not used,
+the server shall use the default signing key.
+
+If option @option{--info} is not given, the server shall also suggest a
+protocol to use for signing. The client may use this suggested protocol
+on its own discretion. The same status line as with PREP_ENCRYPT is
+used for this.
+
+The option @option{--protocol} may be used to give the server a hint on
+which signing protocol should be preferred.
+@end deffn
+
+@noindent
+To allow the UI-server to visually identify a running operation or to
+associate operations the server MAY support the command:
+
+@deffn Command SESSION @var{number} [@var{string}]
+The @var{number} is an arbitrary value, a server may use to associate
+simultaneous running sessions. It is a 32 bit unsigned integer with
+@code{0} as a special value indicating that no session association shall
+be done.
+
+If @var{string} is given, the server may use this as the title of a
+window or, in the case of an email operation, to extract the sender's
+address. The string may contain spaces; thus no plus-escaping is used.
+
+This command may be used at any time and overrides the effect of the
+last command. A @code{RESET} undoes the effect of this command.
+
+@end deffn
diff --git a/doc/version.texi b/doc/version.texi
new file mode 100644
index 0000000..3e9775f
--- /dev/null
+++ b/doc/version.texi
@@ -0,0 +1,4 @@
+@set UPDATED 2 May 2012
+@set UPDATED-MONTH May 2012
+@set EDITION 1.3.2
+@set VERSION 1.3.2