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-rw-r--r--src/pulsecore/memchunk.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/src/pulsecore/memchunk.c b/src/pulsecore/memchunk.c
new file mode 100644
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--- /dev/null
+++ b/src/pulsecore/memchunk.c
@@ -0,0 +1,59 @@
+/* $Id$ */
+
+/***
+ This file is part of PulseAudio.
+
+ PulseAudio 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.
+
+ PulseAudio 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 PulseAudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+
+#include <pulse/xmalloc.h>
+
+#include "memchunk.h"
+
+void pa_memchunk_make_writable(pa_memchunk *c, pa_memblock_stat *s, size_t min) {
+ pa_memblock *n;
+ size_t l;
+ assert(c && c->memblock && c->memblock->ref >= 1);
+
+ if (c->memblock->ref == 1 && !c->memblock->read_only && c->memblock->length >= c->index+min)
+ return;
+
+ l = c->length;
+ if (l < min)
+ l = min;
+
+ n = pa_memblock_new(l, s);
+ memcpy(n->data, (uint8_t*) c->memblock->data + c->index, c->length);
+ pa_memblock_unref(c->memblock);
+ c->memblock = n;
+ c->index = 0;
+}
+
+void pa_memchunk_reset(pa_memchunk *c) {
+ assert(c);
+
+ c->memblock = NULL;
+ c->length = c->index = 0;
+}