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fat_functions.h
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/*******************************************************************************
* xmount Copyright (c) 2008-2016 by Gillen Daniel <gillen.dan@pinguin.lu> *
* *
* This program 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. *
* *
* This program 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 *
* this program. If not, see <http://www.gnu.org/licenses/>. *
*******************************************************************************/
#ifndef FAT_FUNCTIONS_H
#define FAT_FUNCTIONS_H
#include "../libxmount_morphing.h"
// Supported FAT types
typedef enum e_FatType {
FatType_Unknown=0,
FatType_Fat16,
FatType_Fat32
} te_FatType;
// Needed parts of the FAT volume header
typedef struct s_FatVH {
uint8_t jump_inst[3];
uint8_t oem_name[8];
uint16_t bytes_per_sector;
uint8_t sectors_per_cluster;
uint16_t reserved_sectors;
uint8_t fat_count;
uint16_t root_entry_count;
uint16_t total_sectors_16;
uint8_t media_type;
uint16_t fat16_sectors;
uint64_t unused01;
uint32_t total_sectors_32;
// Following value is only valid for FAT32
uint32_t fat32_sectors;
} __attribute__ ((packed)) ts_FatVH, *pts_FatVH;
// FAT handle
typedef struct s_FatHandle {
te_FatType fat_type;
pts_FatVH p_fat_vh;
union {
uint16_t *p_fat16;
uint32_t *p_fat32;
} u_fat;
uint8_t debug;
} ts_FatHandle, *pts_FatHandle;
int ReadFatHeader(pts_FatHandle p_fat_handle,
pts_LibXmountMorphingInputFunctions p_input_functions,
uint8_t debug);
void FreeFatHeader(pts_FatHandle p_fat_handle);
int ReadFat(pts_FatHandle p_fat_handle,
pts_LibXmountMorphingInputFunctions p_input_functions);
int BuildFatBlockMap(pts_FatHandle p_fat_handle,
uint64_t **pp_free_block_map,
uint64_t *p_free_block_map_size,
uint64_t *p_block_size);
int GetFatInfos(pts_FatHandle p_fat_handle, char **pp_buf);
#endif // FAT_FUNCTIONS_H

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