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+XDelta NEWS -- history of user-visible changes. -*- Text -*-
+$Date: Sun, 24 Feb 2002 11:31:12 -0800 $
+$ReleaseVersion: 1.1.4 $
+
+Please send bug reports to xdelta-bugs@XCF.Berkeley.EDU.  See the file
+`README' for a description of how to report bugs.
+
+
+** Changes since version 1.1.3
+
+* Add an implementation of xdp_generator_free() for users of the
+  libxdelta API.  Previously there were no such users of the 1.x API,
+  but Elliot Lee <sopwith@redhat.com> has written a program for
+  providing delta operations on RPM files.  See http://@@@
+
+* The man page now documents return values.
+
+** Changes since version 1.1.2
+
+* Correct error message format for the case when gzread fails trying
+  to automatically decompress a corrupted GZIP file.  The situation
+  itself--corrupt GZIP files--should be dealt with the -p (--pristine)
+  option, which disables GZIP file recognition.  Reported by Ben
+  Escoto.
+
+* Apply a patch from Klaus Dittrich for building on HPUX with the
+  native compiler.  There is now a script called "contrib/build_hpux".
+
+
+** Changes since version 1.1.1
+
+* This code release is a distant fork of the 2.0 release.  It will
+  hopefully be replaced.
+
+* When 'patch' supplies its default TO file name recorded in the
+  delta, it still generates a unique file name to avoid overwriting an
+  existing copy.  Use the 'xdelta info' command to see what file names
+  are contained in the delta.
+
+* The code for writing patches to stdout was broken in the case where
+  gzip compression is used.  Writing patches to stdout has therefore
+  been disabled.  The problem is a limitation in the gzdopen/gzwrite
+  functions provided by zlib--you cannot determine how many bytes have
+  been written to the file descriptor without dup-ing the FD
+  beforehand and then lseek-ing afterwards, which does not work
+  correctly if the output file is not seekable.
+
+* By default, Xdelta uses a hard-coded 16 byte block size.  If you're
+  working with large files, try #undef XDELTA_HARDCODE_SIZE in
+  xdelta.h then use -s BLOCKSIZE (--blocksize=BLOCKSIZE), which should
+  be a power of 2.
+
+* New test program in the 'test' subdirectory, which runs comparisons
+  against "diff --rcs -a" and also verifies the "xdelta patch"
+  command.
+
+* Incorporate DJGPP patches from Richard Dawe <richdawe@bigfoot.com>.
+  You can find his versions directly at:
+
+      ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2apps/xdlt112b.zip
+      ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2apps/xdlt112s.zip
+
+* Updated xdelta(1) man page.
+
+* Updated autoconf (2.50), automake (1.4-p4), libtool (1.4) scripts,
+  which includes updated config.guess and config.sub scripts.
+
+* Correct some backward compatibility issues: strcmp() was not being
+  tested == 0 for formats older than 1.0.4.
+
+* Update GLIB version requirement, now 1.2.8.
+
+* We really need support for 64bit file sizes...  perhaps the next
+  version?
+
+
+** Changes since version 1.1.0
+
+* No one was were able to build the 1.1.0 release because it depended
+  on a version of glib which will not be distributed for some time.
+  This version backs out those dependencies and now requires
+  glib-1.2.1.
+
+
+** Changes since version 1.0.6
+
+* The 64M limit on file sizes has been lifted.  File lengths are now
+  limited by the size of a 32-bit integer.
+
+* The internal data structures were changed and some of the
+  experimental bits of the interface have been moved out of libxdelta,
+  resulting in a simpler interface.  Old patch files are still
+  supported.
+
+
+** Changes since version 1.0.5
+
+* There are 8 bytes of space in the patch format's header that are
+  reserved for future use.  They are not currently used, but were also
+  not being initialized, making it possible for two deltas produced in
+  the same manner to differ.  This was exposed by comparing deltas
+  produced between the same files on Windows and Linux.  With this
+  patch, the results should be identical.
+
+
+** Changes since version 1.0.4
+
+* The code now compiles natively under Windows.  I used MS VC++ 5.0.
+  It depends on glib and zlib, but I don't feel like documenting
+  the build process yet.  I have had some trouble with the zlib DLLs
+  and had to build my own, so you can't build it yourself yet.  There
+  is a pre-built version at
+
+     ftp://ftp.xcf.berkeley.edu/pub/xdelta/xdelta-1.0.5.win32.zip
+
+* Many changes required to keep Xdelta working with PRCS 2.  Mostly
+  this involved keeping up to date with some code that is shared
+  between the two.  All the shared code is now in the "libedsio"
+  subdirectory, which stands for "Error Delivery and Serialized IO".
+
+
+** Changes since version 1.0.3
+
+* Slight change in file format to improve detection of and error
+  messages regarding corrupt deltas (specifically, those left behing
+  when an xdelta process is killed while computing a delta).  This
+  means 1.0.0-1.0.3 will not read these new deltas, they will report a
+  bad magic number.
+
+* Improve several error messages related to corrupt deltas.
+
+
+** Changes since version 1.0.2
+
+* Fix a few bugs, especially one related to the implementation of -m,
+  and a couple more which were shaken out by testing on a pair of
+  emacs releases (~55M each).  These changes only affect the xdelta
+  application, the library is unchanged.
+
+* Add a new command `xdelta info' that lists information about a
+  delta, for example:
+
+    $ xdelta info some.patch
+    xdelta: version 1.0.3 found patch version 1.0 in some.patch
+    xdelta: patch contents are compressed
+    xdelta: patch from:          from
+    xdelta: patch from length:   53309440
+    xdelta: patch from md5:      c0ddcb6904d40da7cf1eae5e6bdbbc01
+    xdelta: patch to:            to
+    xdelta: patch to length:     55377920
+    xdelta: patch to md5:        00b3dd4d1a9b450bc5b8991b183013fb
+    xdelta: patch insert length: 2436426
+    xdelta: patch inst count:    253649
+
+
+** Changes since version 1.0.1
+
+* Fix minor typos, and build improvements.  There is now a gtk-style
+  'xdelta-config' program and autoconf macro to locate the library.
+
+
+** Changes since version 1.0.0
+
+* Fix incorrect usage report in --help output for the patch command.
+
+* Abort when directories are specified, there is no recursive mode.
+
+* Now requires glib-1.1.5.
+
+* The new ``pristine'' option (-p, --pristine) disables
+  automatic uncompression of compressed input data, and is for use
+  when data integrity is being externally verified.  This enables a
+  tool written by Manish Singh (yosh@gimp.org) to compute deltas
+  between the Debian dpkg utility's .deb format.
+
+* A draft paper describing its algorithms, rational, advanced
+  features, and future work is now available at
+  ftp://ftp.xcf.berkeley.edu/pub/xdelta/xdelta.ps.
+
+** Changes since version 0.24
+
+* This version is a complete rewrite, and removes some of the features
+  available in version 0.  Featuring:
+
+  - A completely new and much improved library interface.  This code is
+    a complete rewrite.
+  - An optimized implementation of the XDelta algorithm.
+  - A drastic memory reduction.
+  - The library stream-processes files where possible and uses a page-
+    based interface when seeking is required (allowing the application
+    to run in bounded memory on large files).
+  - There is now a little documentation.  A man page and the
+    beginnings of texinfo documentation.
+  - Includes several advanced features used by PRCS version 2, see the
+    documentation for more information.
+  - Includes a minimal implementation of the Rsync algorithm, also used
+    by PRCS version 2.
+  - Uses an abstract file handle interface, the library has very few
+    system dependencies.  This allows the library client to compute
+    MD5 checksums in a single-pass as XDelta reads files, use pre-
+    computed checksums, or disable checksum verification entirely.
+  - Compression and file-unarchival have been removed from the library,
+    these features are orthogonal.
+
+  At the application level:
+
+  - GDBM archive experiment has been removed.  This functionality is
+    implemented directly in PRCS version 2 using the present library
+    interface.
+  - Base 64 encoding support has been removed for technical reasons.
+  - Can no longer accept patches from stdin, due to the same
+    technical reasons (the patch instruction index is stored at the
+    end of the file, requiring seeking).
+  - Automatic detection and un-archival of RPM and dpkg file formats
+    has been removed.  Automatic uncompression of gzipped files is
+    still supported.
+  - The GIMP plugin is no longer supported.