1 files changed, 134 insertions, 0 deletions
diff --git a/src/data.h b/src/data.h
new file mode 100644
index 0000000..1257a8d
--- /dev/null
+++ b/src/data.h
@@ -0,0 +1,134 @@
+/* data.h - Internal data object abstraction interface.
+   Copyright (C) 2002, 2004, 2005 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.  */
+
+#ifndef DATA_H
+#define DATA_H
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#include <limits.h>
+
+#include "gpgme.h"
+
+
+/* Read up to SIZE bytes into buffer BUFFER from the data object with
+   the handle DH.  Return the number of characters read, 0 on EOF and
+   -1 on error.  If an error occurs, errno is set.  */
+typedef ssize_t (*gpgme_data_read_cb) (gpgme_data_t dh, void *buffer,
+				       size_t size);
+
+/* Write up to SIZE bytes from buffer BUFFER to the data object with
+   the handle DH.  Return the number of characters written, or -1 on
+   error.  If an error occurs, errno is set.  */
+typedef ssize_t (*gpgme_data_write_cb) (gpgme_data_t dh, const void *buffer,
+					size_t size);
+
+/* Set the current position from where the next read or write starts
+   in the data object with the handle DH to OFFSET, relativ to
+   WHENCE.  */
+typedef off_t (*gpgme_data_seek_cb) (gpgme_data_t dh, off_t offset,
+				     int whence);
+
+/* Release the data object with the handle DH.  */
+typedef void (*gpgme_data_release_cb) (gpgme_data_t dh);
+
+/* Get the FD associated with the handle DH, or -1.  */
+typedef int (*gpgme_data_get_fd_cb) (gpgme_data_t dh);
+
+struct _gpgme_data_cbs
+{
+  gpgme_data_read_cb read;
+  gpgme_data_write_cb write;
+  gpgme_data_seek_cb seek;
+  gpgme_data_release_cb release;
+  gpgme_data_get_fd_cb get_fd;
+};
+
+struct gpgme_data
+{
+  struct _gpgme_data_cbs *cbs;
+  gpgme_data_encoding_t encoding;
+
+#ifdef PIPE_BUF
+#define BUFFER_SIZE PIPE_BUF
+#else
+#ifdef _POSIX_PIPE_BUF
+#define BUFFER_SIZE _POSIX_PIPE_BUF
+#else
+#define BUFFER_SIZE 512
+#endif
+#endif
+  char pending[BUFFER_SIZE];
+  int pending_len;
+
+  /* File name of the data object.  */
+  char *file_name;
+
+  union
+  {
+    /* For gpgme_data_new_from_fd.  */
+    int fd;
+
+    /* For gpgme_data_new_from_stream.  */
+    FILE *stream;
+
+    /* For gpgme_data_new_from_cbs.  */
+    struct
+    {
+      gpgme_data_cbs_t cbs;
+      void *handle;
+    } user;
+
+    /* For gpgme_data_new_from_mem.  */
+    struct
+    {
+      char *buffer;
+      const char *orig_buffer;
+      /* Allocated size of BUFFER.  */
+      size_t size;
+      size_t length;
+      off_t offset;
+    } mem;
+
+    /* For gpgme_data_new_from_read_cb.  */
+    struct
+    {
+      int (*cb) (void *, char *, size_t, size_t *);
+      void *handle;
+    } old_user;
+  } data;
+};
+
+
+gpgme_error_t _gpgme_data_new (gpgme_data_t *r_dh,
+			       struct _gpgme_data_cbs *cbs);
+
+void _gpgme_data_release (gpgme_data_t dh);
+
+/* Get the file descriptor associated with DH, if possible.  Otherwise
+   return -1.  */
+int _gpgme_data_get_fd (gpgme_data_t dh);
+
+#endif	/* DATA_H */