Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 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 | |
| 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 | } |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 38 | |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 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 | } |