109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
/* Copyright 1996,1997,2001,2002,2007,2009 Alain Knaff.
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* Copyright 2010 Volker Lanz (vl@fidra.de)
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* This file is part of mtools.
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*
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* Mtools is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Mtools is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Mtools. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MTOOLS_FS_H
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#define MTOOLS_FS_H
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struct Stream_t;
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struct Class_t;
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struct doscp_t;
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struct FsPublic_t
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{
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struct Class_t *Class;
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int refs;
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struct Stream_t *Next;
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struct Stream_t *Buffer;
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int serialized;
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unsigned long serial_number;
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int cluster_size;
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unsigned int sector_size;
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};
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typedef enum fatAccessMode_t
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{
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FAT_ACCESS_READ,
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FAT_ACCESS_WRITE
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} fatAccessMode_t;
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struct Fs_t
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{
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struct Class_t *Class;
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int refs;
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struct Stream_t *Next;
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struct Stream_t *Buffer;
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int serialized;
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unsigned long serial_number;
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unsigned int cluster_size;
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unsigned int sector_size;
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int fat_error;
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unsigned int (*fat_decode)(struct Fs_t *This, unsigned int num);
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void (*fat_encode)(struct Fs_t *This, unsigned int num, unsigned int code);
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struct Stream_t *Direct;
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int fat_dirty;
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unsigned int fat_start;
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unsigned int fat_len;
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unsigned int num_fat;
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unsigned int end_fat;
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unsigned int last_fat;
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int fat_bits; /* must be signed, because we use negative values for special purposes */
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struct FatMap_t *FatMap;
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unsigned int dir_start;
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unsigned int dir_len;
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unsigned int clus_start;
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unsigned int num_clus;
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/* fat 32 */
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unsigned int primaryFat;
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unsigned int writeAllFats;
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unsigned int rootCluster;
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unsigned int infoSectorLoc;
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unsigned int last; /* last sector allocated, or MAX32 if unknown */
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unsigned int freeSpace; /* free space, or MAX32 if unknown */
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int preallocatedClusters;
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int lastFatSectorNr;
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unsigned char *lastFatSectorData;
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fatAccessMode_t lastFatAccessMode;
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int sectorMask;
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int sectorShift;
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struct doscp_t *cp;
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};
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int fs_free(struct Stream_t *Stream);
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unsigned int get_next_free_cluster(struct Fs_t *Fs, unsigned int last);
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unsigned int fatDecode(struct Fs_t *This, unsigned int pos);
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void fatAppend(struct Fs_t *This, unsigned int pos, unsigned int newpos);
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void fatDeallocate(struct Fs_t *This, unsigned int pos);
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void fatAllocate(struct Fs_t *This, unsigned int pos, unsigned int value);
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int fat_read(struct Fs_t *This, union bootsector *boot, int fat_bits, size_t tot_sectors, int nodups);
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int fat_write(struct Fs_t *This);
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struct Stream_t* fs_init(const char* deviceName, int mode);
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int fat_error(struct Stream_t *Dir);
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int fat32RootCluster(struct Stream_t *Dir);
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#endif
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