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- /* $MirOS: contrib/hosted/fwcf/c_zlib.c,v 1.4 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 <stdio.h>
- #include <stdlib.h>
- #include <zlib.h>
- #include "defs.h"
- #include "compress.h"
- __RCSID("$MirOS: contrib/hosted/fwcf/c_zlib.c,v 1.4 2006/09/23 23:46:35 tg Exp $");
- static void c_zlib_load(void) __attribute__((constructor));
- static int c_init(void);
- static int c_compress(char **, char *, size_t)
- __attribute__((bounded (string, 2, 3)));
- static int c_decompress(char *, size_t, char *, size_t)
- __attribute__((bounded (string, 1, 2)))
- __attribute__((bounded (string, 3, 4)));
- static fwcf_compressor c_zlib = {
- c_init, /* init */
- c_compress, /* compress */
- c_decompress, /* decompress */
- "zlib", /* name */
- 0x01 /* code */
- };
- static void
- c_zlib_load(void)
- {
- if (compress_register(&c_zlib))
- fputs("warning: cannot register compressor 'zlib'!\n", stderr);
- }
- static int
- c_init(void)
- {
- return (0);
- }
- static int
- c_compress(char **dst, char *src, size_t len)
- {
- uLongf dstlen;
- if (dst == NULL)
- return (-1);
- dstlen = compressBound(len);
- if ((*dst = malloc(dstlen)) == NULL)
- return (-1);
- return ((compress2((uint8_t *)*dst, &dstlen, (uint8_t *)src, len,
- 9) == Z_OK) ? (int)dstlen : -1);
- }
- static int
- c_decompress(char *dst, size_t dstlen, char *src, size_t srclen)
- {
- uLongf len = dstlen;
- return ((uncompress((uint8_t *)dst, &len, (uint8_t *)src,
- srclen) == Z_OK) ? (int)len : -1);
- }
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