1 files changed, 102 insertions, 0 deletions
diff --git a/agent/buffer.h b/agent/buffer.h
new file mode 100644
index 000000000..121ad0a31
--- /dev/null
+++ b/agent/buffer.h
@@ -0,0 +1,102 @@
+/* buffer.h - Buffer management layer
+   Copyright (C) 2004 g10 Code GmbH
+
+   This file is part of libgpg-stream.
+ 
+   libgpg-stream 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 of the
+   License, or (at your option) any later version.
+ 
+   libgpg-stream 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 General Public License
+   along with libgpg-stream; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
+
+#ifndef BUFFER_H
+#define BUFFER_H
+
+#include <sys/types.h>
+#include <stdarg.h>
+
+#include <gpg-error.h>
+
+
+
+#define BUFFER_BLOCK_SIZE 1024
+
+
+
+typedef struct buffer *buffer_t;
+
+/* Callbacks, necessary for filling/flushing/seeking.  */
+typedef gpg_error_t (*buffer_func_read_t) (void *handle,
+					   char *buffer,
+					   size_t bytes_to_read,
+					   size_t *bytes_read);
+typedef gpg_error_t (*buffer_func_write_t) (void *handle,
+					    const char *buffer,
+					    size_t bytes_to_write,
+					    size_t *bytes_written);
+typedef gpg_error_t (*buffer_func_seek_t) (void *handle,
+					   off_t offset,
+					   int whence);
+
+typedef gpg_error_t (*buffer_func_stat_t) (void *handle,
+					   size_t *size);
+
+typedef struct buffer_functions
+{
+  buffer_func_read_t  func_read;  /* Read callback.   */
+  buffer_func_write_t func_write; /* Write callback.  */
+  buffer_func_seek_t  func_seek;  /* Seek callback.   */
+  buffer_func_stat_t  func_stat;  /* Stat callback.   */
+} buffer_functions_t;
+
+/* Create a new buffer.  */
+gpg_error_t buffer_create (buffer_t *buffer,
+			   void *handle,
+			   buffer_functions_t functions);
+
+/* Destroy a buffer.  */
+gpg_error_t buffer_destroy (buffer_t buffer);
+
+/* Read from a buffer.  */
+gpg_error_t buffer_read (buffer_t buffer,
+			 char *data,
+			 size_t bytes_to_read,
+			 size_t *bytes_read);
+
+/* Write to a buffer.  */
+gpg_error_t buffer_write (buffer_t buffer,
+			  const char *data,
+			  size_t bytes_to_write,
+			  size_t *bytes_written);
+
+/* Seek in a buffer.  */
+gpg_error_t buffer_seek (buffer_t buffer,
+			 off_t offset,
+			 int whence);
+
+/* Return the unread data contained in a buffer.  */
+gpg_error_t buffer_peek (buffer_t buffer,
+			 char **data,
+			 size_t *data_size);
+
+/* Skip SIZE bytes of input data contained in buffer.  */
+gpg_error_t buffer_skip (buffer_t buffer,
+			 size_t size);
+
+/* Write out unwritten data contained in buffer.  */
+gpg_error_t buffer_flush (buffer_t buffer);
+
+/* Stat buffer.  */
+gpg_error_t buffer_stat (buffer_t buffer,
+			 size_t *size);
+
+#endif