1 /* Copyright 1986-1992 Emmet P. Gray.
2 * Copyright 1996,1997,1999,2002,2009 Alain Knaff.
3 * This file is part of mtools.
4 *
5 * Mtools is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * Mtools is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with Mtools. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #include "sysincludes.h"
20 #include "msdos.h"
21 #include "mtools.h"
22 #include "file.h"
23
24 /*
25 * Read the clusters given the beginning FAT entry. Returns 0 on success.
26 */
27
file_read(FILE * fp,Stream_t * Source,int textmode,int stripmode)28 int file_read(FILE *fp, Stream_t *Source, int textmode, int stripmode)
29 {
30 char buffer[16384];
31 int pos;
32 int ret;
33
34 if (!Source){
35 fprintf(stderr,"Couldn't open source file\n");
36 return -1;
37 }
38
39 pos = 0;
40 while(1){
41 ret = Source->Class->read(Source, buffer, pos, 16384);
42 if (ret < 0 ){
43 perror("file read");
44 return -1;
45 }
46 if ( ret == 0)
47 break;
48 if(!fwrite(buffer, 1, ret, fp)){
49 perror("write");
50 return -1;
51 }
52 pos += ret;
53 }
54 return 0;
55 }
56