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Diffstat (limited to 'fsP.h')
| -rw-r--r-- | fsP.h | 103 |
1 files changed, 103 insertions, 0 deletions
@@ -0,0 +1,103 @@ +#ifndef MTOOLS_FSP_H +#define MTOOLS_FSP_H + +/* Copyright 1996-1999,2001-2003,2008,2009 Alain Knaff. + * This file is part of mtools. + * + * Mtools is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * Mtools is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with Mtools. If not, see <http://www.gnu.org/licenses/>. + */ +#include "stream.h" +#include "msdos.h" +#include "fs.h" + +typedef enum fatAccessMode_t { + FAT_ACCESS_READ, + FAT_ACCESS_WRITE +} fatAccessMode_t; + +typedef struct Fs_t { + Class_t *Class; + int refs; + Stream_t *Next; + Stream_t *Buffer; + + int serialized; + unsigned long serial_number; + unsigned int cluster_size; + unsigned int sector_size; + int fat_error; + + unsigned int (*fat_decode)(struct Fs_t *This, unsigned int num); + void (*fat_encode)(struct Fs_t *This, unsigned int num, + unsigned int code); + + Stream_t *Direct; + int fat_dirty; + unsigned int fat_start; + unsigned int fat_len; + + unsigned int num_fat; + unsigned int end_fat; + unsigned int last_fat; + int fat_bits; /* must be signed, because we use negative values + * for special purposes */ + struct FatMap_t *FatMap; + + unsigned int dir_start; + unsigned int dir_len; + unsigned int clus_start; + + unsigned int num_clus; + char drive; /* for error messages */ + + /* fat 32 */ + unsigned int primaryFat; + unsigned int writeAllFats; + unsigned int rootCluster; + unsigned int infoSectorLoc; + unsigned int last; /* last sector allocated, or MAX32 if unknown */ + unsigned int freeSpace; /* free space, or MAX32 if unknown */ + int preallocatedClusters; + + int lastFatSectorNr; + unsigned char *lastFatSectorData; + fatAccessMode_t lastFatAccessMode; + int sectorMask; + int sectorShift; + + doscp_t *cp; +} Fs_t; + +int fs_free(Stream_t *Stream); + +void set_fat12(Fs_t *Fs); +void set_fat16(Fs_t *Fs); +void set_fat32(Fs_t *Fs); +unsigned int get_next_free_cluster(Fs_t *Fs, unsigned int last); +unsigned int fatDecode(Fs_t *This, unsigned int pos); +void fatAppend(Fs_t *This, unsigned int pos, unsigned int newpos); +void fatDeallocate(Fs_t *This, unsigned int pos); +void fatAllocate(Fs_t *This, unsigned int pos, unsigned int value); +void fatEncode(Fs_t *This, unsigned int pos, unsigned int value); + +int fat_read(Fs_t *This, union bootsector *boot, + size_t tot_sectors, int nodups); +void fat_write(Fs_t *This); +int zero_fat(Fs_t *Fs, int media_descriptor); +extern Class_t FsClass; +int fsPreallocateClusters(Fs_t *Fs, long); +Fs_t *getFs(Stream_t *Stream); + + +#endif |