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 /*
23 Ignore requests for compression and return errors for decompression.
24 Stub algorithm.
25
26 */
27
28
29 #include "dact.h"
30 #include "comp_fail.h"
31 #include <stdio.h>
32 #ifdef HAVE_UNISTD_H
33 #include <unistd.h>
34 #endif
35 #ifdef HAVE_STDLIB_H
36 #include <stdlib.h>
37 #endif
38
39
40 /*
41 mode - DACT_MODE_COMPR or DACT_MODE_DECMP
42 Determine whether to compress or decompress.
43 prev_block - Previous (uncompressed) block.
44 curr_block - The data to be compressed.
45 out_block - Where to put data after compression.
46 blk_size - Size of prev_block and curr_block.
47 */
comp_fail_algo(int mode,unsigned char * prev_block,unsigned char * curr_block,char * out_block,int blk_size,int bufsize)48 int comp_fail_algo(int mode, unsigned char *prev_block, unsigned char *curr_block, char *out_block, int blk_size, int bufsize) {
49 switch(mode) {
50 case DACT_MODE_COMPR:
51 return(comp_fail_compress(prev_block, curr_block, out_block, blk_size, bufsize));
52 break; /* Heh */
53 case DACT_MODE_DECMP:
54 return(comp_fail_decompress(prev_block, curr_block, out_block, blk_size, bufsize));
55 break;
56 default:
57 printf("Unsupported mode: %i\n", mode);
58 return(-1);
59 }
60 }
61
comp_fail_compress(unsigned char * prev_block,unsigned char * curr_block,char * out_block,int blk_size,int bufsize)62 int comp_fail_compress(unsigned char *prev_block, unsigned char *curr_block, char *out_block, int blk_size, int bufsize) {
63 return(-1);
64 }
65
comp_fail_decompress(unsigned char * prev_block,unsigned char * curr_block,char * out_block,int blk_size,int bufsize)66 int comp_fail_decompress(unsigned char *prev_block, unsigned char *curr_block, char *out_block, int blk_size, int bufsize) {
67 printf("You tried to decompress a file with an algorithm that is not compiled into your version. Output will be unusable.\n");
68 return(0);
69 }
70