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 28int 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