120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
#ifndef MTOOLS_FSP_H
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#define MTOOLS_FSP_H
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/* Copyright 1996-1999,2001-2003,2008,2009 Alain Knaff.
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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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#include "stream.h"
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#include "msdos.h"
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#include "fs.h"
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typedef enum fatAccessMode_t {
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FAT_ACCESS_READ,
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FAT_ACCESS_WRITE
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} fatAccessMode_t;
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typedef struct Fs_t {
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struct Stream_t head;
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int serialized;
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unsigned long serial_number;
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uint8_t cluster_size;
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uint16_t 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,
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unsigned int code);
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int fat_dirty;
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uint16_t fat_start;
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uint32_t fat_len;
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uint8_t num_fat;
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uint32_t end_fat;
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uint32_t last_fat;
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unsigned int fat_bits; /* When it ends up here, all negative
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special values have been
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eliminated */
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struct FatMap_t *FatMap;
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uint32_t dir_start;
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uint16_t dir_len;
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uint32_t clus_start;
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uint32_t num_clus;
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char drive; /* for error messages */
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/* fat 32 */
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uint32_t primaryFat;
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uint32_t writeAllFats;
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uint32_t rootCluster;
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uint32_t infoSectorLoc;
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uint16_t backupBoot;
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uint32_t last; /* last sector allocated, or MAX32 if unknown */
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uint32_t freeSpace; /* free space, or MAX32 if unknown */
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unsigned int preallocatedClusters;
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uint32_t lastFatSectorNr;
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unsigned char *lastFatSectorData;
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fatAccessMode_t lastFatAccessMode;
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unsigned int sectorMask;
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unsigned int sectorShift;
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doscp_t *cp;
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} Fs_t;
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#ifndef abs
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#define abs(x) ((unsigned int)((x)>0?(x):-(x)))
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#endif
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mt_off_t sectorsToBytes(Fs_t *This, uint32_t off);
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int fs_free(Stream_t *Stream);
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void set_fat(Fs_t *This);
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unsigned int get_next_free_cluster(Fs_t *Fs, unsigned int last);
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unsigned int fatDecode(Fs_t *This, unsigned int pos);
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void fatAppend(Fs_t *This, unsigned int pos, unsigned int newpos);
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void fatDeallocate(Fs_t *This, unsigned int pos);
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void fatAllocate(Fs_t *This, unsigned int pos, unsigned int value);
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void fatEncode(Fs_t *This, unsigned int pos, unsigned int value);
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int fat_read(Fs_t *This, union bootsector *boot, int nodups);
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void fat_write(Fs_t *This);
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int zero_fat(Fs_t *Fs, uint8_t media_descriptor);
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extern Class_t FsClass;
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int fsPreallocateClusters(Fs_t *Fs, uint32_t);
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void fsReleasePreallocateClusters(Fs_t *Fs, uint32_t);
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Fs_t *getFs(Stream_t *Stream);
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int calc_fs_parameters(struct device *dev, bool fat32, uint32_t tot_sectors,
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struct Fs_t *Fs, uint8_t *descr);
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/* Fs_t *makeFsForFormat(void); */
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void initFsForFormat(Fs_t *Fs);
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void setFsSectorSize(Fs_t *Fs, struct device *dev, uint16_t msize);
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uint32_t parseFsParams( Fs_t *This,
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union bootsector *boot,
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int media,
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unsigned int cylinder_size);
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uint32_t calc_clus_start(Fs_t *Fs);
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int calc_num_clus(Fs_t *Fs, uint32_t tot_sectors);
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#endif
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