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/* $MirOS: contrib/hosted/fwcf/compress.c,v 1.7 2006/09/23 23:46:35 tg Exp $ */
/*-
* Copyright (c) 2006
* Thorsten Glaser <tg@mirbsd.de>
*
* Licensee is hereby permitted to deal in this work without restric-
* tion, including unlimited rights to use, publicly perform, modify,
* merge, distribute, sell, give away or sublicence, provided all co-
* pyright notices above, these terms and the disclaimer are retained
* in all redistributions or reproduced in accompanying documentation
* or other materials provided with binary redistributions.
*
* Licensor offers the work "AS IS" and WITHOUT WARRANTY of any kind,
* express, or implied, to the maximum extent permitted by applicable
* law, without malicious intent or gross negligence; in no event may
* licensor, an author or contributor be held liable for any indirect
* or other damage, or direct damage except proven a consequence of a
* direct error of said person and intended use of this work, loss or
* other issues arising in any way out of its use, even if advised of
* the possibility of such damage or existence of a defect.
*/
#include <sys/param.h>
#include <err.h>
#include <stdlib.h>
#include "defs.h"
#include "compress.h"
static void compress_initialise(void);
static fwcf_compressor *fwcf_compressors = NULL;
int
compress_register(fwcf_compressor *e)
{
compress_initialise();
if (e == NULL)
return (1);
if ((e->init == NULL) || (e->compress == NULL) ||
(e->decompress == NULL) || (e->name == NULL))
return (1);
if (fwcf_compressors[e->code].name != NULL)
return (2);
fwcf_compressors[e->code] = *e;
return (0);
}
fwcf_compressor *
compress_enumerate(void)
{
int i;
fwcf_compressor *rv = NULL;
compress_initialise();
for (i = 0; i < 256; ++i)
if (fwcf_compressors[i].name != NULL) {
if (fwcf_compressors[i].code == i)
rv = fwcf_compressors;
else
errx(1, "fwcf compressor registry invalid");
}
return (rv);
}
static void
compress_initialise(void)
{
if (fwcf_compressors != NULL)
return;
if ((fwcf_compressors = calloc(256, sizeof (fwcf_compressor))) == NULL)
err(1, "calloc");
}
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