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- /* $MirOS: contrib/hosted/fwcf/c_lzo1x1.c,v 1.5 2007/03/13 18:31:07 tg Exp $ */
- /*-
- * MiniLZO (LZO1X-1) compression plug-in for FWCF
- * Copyright (c) 2006
- * Thorsten Glaser <tg@mirbsd.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 1, or (at your option)
- * any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to
- * the utmost extent permitted by applicable law, neither express nor
- * implied; without malicious intent or gross negligence. In no event
- * may a licensor, author or contributor be held liable for indirect,
- * direct, other damage, loss, or other issues arising in any way out
- * of dealing in the work, even if advised of the possibility of such
- * damage or existence of a defect, except proven that it results out
- * of said person's immediate fault when using the work as intended.
- */
- #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_lzo1x1.c,v 1.5 2007/03/13 18:31:07 tg Exp $");
- #define C_LZO1X1_T1(a,b) c_lzo1x1_ ## a ## _ ## b
- #define C_LZO1X1_T2(a,b) C_LZO1X1_T1(a,b)
- #define LZO_COMPILE_TIME_ASSERT_HEADER(e) \
- extern int C_LZO1X1_T2(__LINE__,__lzo_cta)[1-2*!(e)];
- #define MINILZO_CFG_SKIP_LZO1X_DECOMPRESS 1
- #define MINILZO_CFG_SKIP_LZO_PTR 1
- #define MINILZO_CFG_SKIP_LZO_STRING 1
- #include "minilzo.c"
- static void c_lzo1x1_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_lzo1x1 = {
- c_init, /* init */
- c_compress, /* compress */
- c_decompress, /* decompress */
- "lzo1x1", /* name */
- 0x10 /* code */
- };
- /* Work-memory needed for compression. Allocate memory in units
- * of `lzo_align_t' (instead of `char') to make sure it is properly aligned.
- */
- #define HEAP_ALLOC(var,size) \
- lzo_align_t __LZO_MMODEL var [ ((size) + (sizeof(lzo_align_t) - 1)) / sizeof(lzo_align_t) ]
- static HEAP_ALLOC(wrkmem,LZO1X_1_MEM_COMPRESS);
- static void
- c_lzo1x1_load(void)
- {
- if (compress_register(&c_lzo1x1))
- fputs("warning: cannot register compressor 'lzo1x1'!\n", stderr);
- }
- static int
- c_init(void)
- {
- return ((lzo_init() == LZO_E_OK) ? 0 : 1);
- }
- static int
- c_compress(char **dst, char *src, size_t len)
- {
- lzo_bytep ldst;
- lzo_uint ldlen = len + (len / 16) + 64 + 3;
- if ((ldst = malloc(ldlen)) == NULL)
- return (-1);
- #ifdef DEBUG
- fprintf(stderr, "LZO1X-1 compress %lu bytes -> (%lu)",
- (u_long)len, (u_long)ldlen);
- #endif
- lzo1x_1_compress((lzo_bytep)src, len, ldst, &ldlen, wrkmem);
- #ifdef DEBUG
- fprintf(stderr, " %lu bytes\n", (u_long)ldlen);
- #endif
- *dst = (char *)ldst;
- return (ldlen);
- }
- static int
- c_decompress(char *dst, size_t dstlen, char *src, size_t srclen)
- {
- lzo_uint ldlen = dstlen;
- int i;
- #ifdef DEBUG
- fprintf(stderr, "LZO1X decompress %lu -> %lu bytes\n",
- (u_long)srclen, (u_long)dstlen);
- #endif
- if (((i = lzo1x_decompress_safe((lzo_bytep)src, srclen, (lzo_bytep)dst,
- &ldlen, wrkmem)) == LZO_E_OK) || (i == LZO_E_INPUT_NOT_CONSUMED))
- return (ldlen);
- #ifdef DEBUG
- fprintf(stderr, "LZO1X decompress error code %d\n", i);
- #endif
- return (-1);
- }
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