1/* Copyright 1986-1992 Emmet P. Gray. 2 * Copyright 1996-1998,2001,2002,2009 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 "fsP.h" 22#include "mtoolsDirentry.h" 23 24/* 25 * Remove a string of FAT entries (delete the file). The argument is 26 * the beginning of the string. Does not consider the file length, so 27 * if FAT is corrupted, watch out! 28 */ 29 30int fat_free(Stream_t *Dir, unsigned int fat) 31{ 32 Stream_t *Stream = GetFs(Dir); 33 DeclareThis(Fs_t); 34 unsigned int next_no_step; 35 /* a zero length file? */ 36 if (fat == 0) 37 return(0); 38 /* CONSTCOND */ 39 while (!This->fat_error) { 40 /* get next cluster number */ 41 next_no_step = fatDecode(This,fat); 42 /* mark current cluster as empty */ 43 fatDeallocate(This,fat); 44 if (next_no_step >= This->last_fat) 45 break; 46 fat = next_no_step; 47 } 48 return(0); 49} 50 51int fatFreeWithDir(Stream_t *Dir, struct directory *dir) 52{ 53 unsigned int first; 54 55 if((!strncmp(dir->name,". ",8) || 56 !strncmp(dir->name,".. ",8)) && 57 !strncmp(dir->ext," ",3)) { 58 fprintf(stderr,"Trying to remove . or .. entry\n"); 59 return -1; 60 } 61 62 first = START(dir); 63 if(fat32RootCluster(Dir)) 64 first |= STARTHI(dir) << 16; 65 return fat_free(Dir, first); 66} 67 68int fatFreeWithDirentry(direntry_t *entry) 69{ 70 return fatFreeWithDir(entry->Dir, &entry->dir); 71} 72 73