1 #ifndef MTOOLS_FSP_H 2 #define MTOOLS_FSP_H 3 4 /* Copyright 1996-1999,2001-2003,2008,2009 Alain Knaff. 5 * This file is part of mtools. 6 * 7 * Mtools is free software: you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation, either version 3 of the License, or 10 * (at your option) any later version. 11 * 12 * Mtools is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with Mtools. If not, see <http://www.gnu.org/licenses/>. 19 */ 20 #include "stream.h" 21 #include "msdos.h" 22 #include "fs.h" 23 24 typedef enum fatAccessMode_t { 25 FAT_ACCESS_READ, 26 FAT_ACCESS_WRITE 27 } fatAccessMode_t; 28 29 typedef struct Fs_t { 30 Class_t *Class; 31 int refs; 32 Stream_t *Next; 33 Stream_t *Buffer; 34 35 int serialized; 36 unsigned long serial_number; 37 unsigned int cluster_size; 38 unsigned int sector_size; 39 int fat_error; 40 41 unsigned int (*fat_decode)(struct Fs_t *This, unsigned int num); 42 void (*fat_encode)(struct Fs_t *This, unsigned int num, 43 unsigned int code); 44 45 Stream_t *Direct; 46 int fat_dirty; 47 unsigned int fat_start; 48 unsigned int fat_len; 49 50 unsigned int num_fat; 51 unsigned int end_fat; 52 unsigned int last_fat; 53 int fat_bits; /* must be signed, because we use negative values 54 * for special purposes */ 55 struct FatMap_t *FatMap; 56 57 unsigned int dir_start; 58 unsigned int dir_len; 59 unsigned int clus_start; 60 61 unsigned int num_clus; 62 char drive; /* for error messages */ 63 64 /* fat 32 */ 65 unsigned int primaryFat; 66 unsigned int writeAllFats; 67 unsigned int rootCluster; 68 unsigned int infoSectorLoc; 69 unsigned int last; /* last sector allocated, or MAX32 if unknown */ 70 unsigned int freeSpace; /* free space, or MAX32 if unknown */ 71 int preallocatedClusters; 72 73 int lastFatSectorNr; 74 unsigned char *lastFatSectorData; 75 fatAccessMode_t lastFatAccessMode; 76 int sectorMask; 77 int sectorShift; 78 79 doscp_t *cp; 80 } Fs_t; 81 82 int fs_free(Stream_t *Stream); 83 84 void set_fat12(Fs_t *Fs); 85 void set_fat16(Fs_t *Fs); 86 void set_fat32(Fs_t *Fs); 87 unsigned int get_next_free_cluster(Fs_t *Fs, unsigned int last); 88 unsigned int fatDecode(Fs_t *This, unsigned int pos); 89 void fatAppend(Fs_t *This, unsigned int pos, unsigned int newpos); 90 void fatDeallocate(Fs_t *This, unsigned int pos); 91 void fatAllocate(Fs_t *This, unsigned int pos, unsigned int value); 92 void fatEncode(Fs_t *This, unsigned int pos, unsigned int value); 93 94 int fat_read(Fs_t *This, union bootsector *boot, 95 size_t tot_sectors, int nodups); 96 void fat_write(Fs_t *This); 97 int zero_fat(Fs_t *Fs, int media_descriptor); 98 extern Class_t FsClass; 99 int fsPreallocateClusters(Fs_t *Fs, long); 100 Fs_t *getFs(Stream_t *Stream); 101 102 103 #endif 104