1 /*
2 * Copyright (C) 2001, 2002, and 2003 Roy Keene
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 *
18 * email: dact@rkeene.org
19 */
20
21
22 #include "dact.h"
23 #include "comp_lzooy.h"
24 #ifndef comp_lzooy_algo
25 #include <lzoconf.h>
26 #include <lzo1y.h>
27 #include <stdio.h>
28 #ifdef HAVE_UNISTD_H
29 #include <unistd.h>
30 #endif
31 #ifdef HAVE_STDLIB_H
32 #include <stdlib.h>
33 #endif
34
35
36 /*
37 mode - DACT_MODE_COMPR or DACT_MODE_DECMP
38 Determine whether to compress or decompress.
39 prev_block - Previous (uncompressed) block.
40 curr_block - The data to be compressed.
41 out_block - Where to put data after compression.
42 blk_size - Size of prev_block and curr_block.
43 */
44
45 #if defined(AS_MODULE) && defined(USE_MODULES)
46 #include "module.h"
47 uint32_t DC_NUM=14;
48 uint32_t DC_TYPE=DACT_MOD_TYPE_COMP;
49 void *DC_ALGO=comp_lzooy_algo;
50 char *DC_NAME="LZO-1y Compression (MOD)";
51 /*
52 char *DC_SIGN="RGlnaXRhbFNpZ25hdHVyZQ==";
53 char *DC_URL_GET="http://www.rkeene.org/projects/compression/dact/@@OSNM@@-@@ARCH@@/comp_rle.dll";
54 char *DC_URL_VER="http://www.rkeene.org/projects/compression/dact/@@OSNM@@-@@ARCH@@/comp_rle.ver";
55 uint32_t DC_VER=0x00080d;
56 uint32_t DC_REQUIRE=DACT_MOD_REQ_ATLEAST|(0x00080d);
57 */
58 #endif
59
comp_lzooy_algo(int mode,unsigned char * prev_block,unsigned char * curr_block,char * out_block,int blk_size,int bufsize)60 int comp_lzooy_algo(int mode, unsigned char *prev_block, unsigned char *curr_block, char *out_block, int blk_size, int bufsize) {
61 switch(mode) {
62 case DACT_MODE_COMPR:
63 return(comp_lzooy_compress(prev_block, curr_block, out_block, blk_size, bufsize));
64 break; /* Heh */
65 case DACT_MODE_DECMP:
66 return(comp_lzooy_decompress(prev_block, curr_block, out_block, blk_size, bufsize));
67 break;
68 default:
69 printf("Unsupported mode: %i\n", mode);
70 return(-1);
71 }
72 }
73
comp_lzooy_compress(unsigned char * prev_block,unsigned char * curr_block,char * out_block,int blk_size,int bufsize)74 int comp_lzooy_compress(unsigned char *prev_block, unsigned char *curr_block, char *out_block, int blk_size, int bufsize) {
75 int retsize=0;
76 char *wrkmem;
77
78 if ((wrkmem=malloc(LZO1Y_999_MEM_COMPRESS))==NULL) return(-1);
79 if (lzo_init()!=LZO_E_OK) return(-1);
80 lzo1y_999_compress(curr_block, blk_size, out_block, &retsize, wrkmem);
81 free(wrkmem);
82 return(retsize);
83 }
84
comp_lzooy_decompress(unsigned char * prev_block,unsigned char * curr_block,char * out_block,int blk_size,int bufsize)85 int comp_lzooy_decompress(unsigned char *prev_block, unsigned char *curr_block, char *out_block, int blk_size, int bufsize) {
86 int retsize=0, retval;
87
88 if (lzo_init()!=LZO_E_OK) return(-1);
89 retval=lzo1y_decompress(curr_block, blk_size, out_block, &retsize, NULL);
90 if (retval!=LZO_E_OK) return(-1);
91 return(retsize);
92 }
93 #endif
94