--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/libpurple/circbuffer.h Sun Apr 15 03:43:17 2007 +0000
@@ -0,0 +1,117 @@
+/*
+ * @file circbuffer.h Buffer Utility Functions
+ * @ingroup core
+ *
+ * Purple is the legal property of its developers, whose names are too numerous
+ * to list here. Please refer to the COPYRIGHT file distributed with this
+ * source distribution.
+ *
+ * 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 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef _CIRCBUFFER_H
+#define _CIRCBUFFER_H
+
+#include <glib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct _PurpleCircBuffer {
+
+ /** A pointer to the starting address of our chunk of memory. */
+ gchar *buffer;
+
+ /** The incremental amount to increase this buffer by when
+ * the buffer is not big enough to hold incoming data, in bytes. */
+ gsize growsize;
+
+ /** The length of this buffer, in bytes. */
+ gsize buflen;
+
+ /** The number of bytes of this buffer that contain unread data. */
+ gsize bufused;
+
+ /** A pointer to the next byte where new incoming data is
+ * buffered to. */
+ gchar *inptr;
+
+ /** A pointer to the next byte of buffered data that should be
+ * read by the consumer. */
+ gchar *outptr;
+
+} PurpleCircBuffer;
+
+/**
+ * Creates a new circular buffer. This will not allocate any memory for the
+ * actual buffer until data is appended to it.
+ *
+ * @param growsize The amount that the buffer should grow the first time data
+ * is appended and every time more space is needed. Pass in
+ * "0" to use the default of 256 bytes.
+ *
+ * @return The new PurpleCircBuffer. This should be freed with
+ * purple_circ_buffer_destroy when you are done with it
+ */
+PurpleCircBuffer *purple_circ_buffer_new(gsize growsize);
+
+/**
+ * Dispose of the PurpleCircBuffer and free any memory used by it (including any
+ * memory used by the internal buffer).
+ *
+ * @param buf The PurpleCircBuffer to free
+ */
+void purple_circ_buffer_destroy(PurpleCircBuffer *buf);
+
+/**
+ * Append data to the PurpleCircBuffer. This will grow the internal
+ * buffer to fit the added data, if needed.
+ *
+ * @param buf The PurpleCircBuffer to which to append the data
+ * @param src pointer to the data to copy into the buffer
+ * @param len number of bytes to copy into the buffer
+ */
+void purple_circ_buffer_append(PurpleCircBuffer *buf, gconstpointer src, gsize len);
+
+/**
+ * Determine the maximum number of contiguous bytes that can be read from the
+ * PurpleCircBuffer.
+ * Note: This may not be the total number of bytes that are buffered - a
+ * subsequent call after calling purple_circ_buffer_mark_read() may indicate more
+ * data is available to read.
+ *
+ * @param buf the PurpleCircBuffer for which to determine the maximum contiguous
+ * bytes that can be read.
+ *
+ * @return the number of bytes that can be read from the PurpleCircBuffer
+ */
+gsize purple_circ_buffer_get_max_read(const PurpleCircBuffer *buf);
+
+/**
+ * Mark the number of bytes that have been read from the buffer.
+ *
+ * @param buf The PurpleCircBuffer to mark bytes read from
+ * @param len The number of bytes to mark as read
+ *
+ * @return TRUE if we successfully marked the bytes as having been read, FALSE
+ * otherwise.
+ */
+gboolean purple_circ_buffer_mark_read(PurpleCircBuffer *buf, gsize len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _CIRCBUFFER_H */