diff options
Diffstat (limited to 'src/polypcore/memchunk.c')
-rw-r--r-- | src/polypcore/memchunk.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/polypcore/memchunk.c b/src/polypcore/memchunk.c new file mode 100644 index 00000000..bfd74f9e --- /dev/null +++ b/src/polypcore/memchunk.c @@ -0,0 +1,58 @@ +/* $Id$ */ + +/*** + This file is part of polypaudio. + + polypaudio 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. + + polypaudio 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 polypaudio; 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 "memchunk.h" +#include "xmalloc.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; +} |