| Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 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 |