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- /* $MirOS: contrib/hosted/fwcf/c_null.c,v 1.5 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 <string.h>
- #include "defs.h"
- #include "compress.h"
- __RCSID("$MirOS: contrib/hosted/fwcf/c_null.c,v 1.5 2006/09/23 23:46:35 tg Exp $");
- static void c_null_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_null = {
- c_init, /* init */
- c_compress, /* compress */
- c_decompress, /* decompress */
- "null", /* name */
- 0 /* code */
- };
- static void
- c_null_load(void)
- {
- if (compress_register(&c_null))
- fputs("warning: cannot register compressor 'null'!\n", stderr);
- }
- static int
- c_init(void)
- {
- return (0);
- }
- static int
- c_compress(char **dst, char *src, size_t len)
- {
- if ((*dst = malloc(len)) == NULL)
- return (-1);
- memcpy(*dst, src, len);
- return (len);
- }
- static int
- c_decompress(char *dst, size_t dstlen, char *src, size_t srclen)
- {
- size_t len = MIN(srclen, dstlen);
- memmove(dst, src, len);
- return (len);
- }
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