mirror of
https://github.com/ventoy/Ventoy.git
synced 2024-11-28 04:14:42 +00:00
129 lines
4.9 KiB
C
129 lines
4.9 KiB
C
#ifndef __FAT_DEFS_H__
|
|
#define __FAT_DEFS_H__
|
|
|
|
#include "fat_opts.h"
|
|
#include "fat_types.h"
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// FAT32 Offsets
|
|
// Name Offset
|
|
//-----------------------------------------------------------------------------
|
|
|
|
// Boot Sector
|
|
#define BS_JMPBOOT 0 // Length = 3
|
|
#define BS_OEMNAME 3 // Length = 8
|
|
#define BPB_BYTSPERSEC 11 // Length = 2
|
|
#define BPB_SECPERCLUS 13 // Length = 1
|
|
#define BPB_RSVDSECCNT 14 // Length = 2
|
|
#define BPB_NUMFATS 16 // Length = 1
|
|
#define BPB_ROOTENTCNT 17 // Length = 2
|
|
#define BPB_TOTSEC16 19 // Length = 2
|
|
#define BPB_MEDIA 21 // Length = 1
|
|
#define BPB_FATSZ16 22 // Length = 2
|
|
#define BPB_SECPERTRK 24 // Length = 2
|
|
#define BPB_NUMHEADS 26 // Length = 2
|
|
#define BPB_HIDDSEC 28 // Length = 4
|
|
#define BPB_TOTSEC32 32 // Length = 4
|
|
|
|
// FAT 12/16
|
|
#define BS_FAT_DRVNUM 36 // Length = 1
|
|
#define BS_FAT_BOOTSIG 38 // Length = 1
|
|
#define BS_FAT_VOLID 39 // Length = 4
|
|
#define BS_FAT_VOLLAB 43 // Length = 11
|
|
#define BS_FAT_FILSYSTYPE 54 // Length = 8
|
|
|
|
// FAT 32
|
|
#define BPB_FAT32_FATSZ32 36 // Length = 4
|
|
#define BPB_FAT32_EXTFLAGS 40 // Length = 2
|
|
#define BPB_FAT32_FSVER 42 // Length = 2
|
|
#define BPB_FAT32_ROOTCLUS 44 // Length = 4
|
|
#define BPB_FAT32_FSINFO 48 // Length = 2
|
|
#define BPB_FAT32_BKBOOTSEC 50 // Length = 2
|
|
#define BS_FAT32_DRVNUM 64 // Length = 1
|
|
#define BS_FAT32_BOOTSIG 66 // Length = 1
|
|
#define BS_FAT32_VOLID 67 // Length = 4
|
|
#define BS_FAT32_VOLLAB 71 // Length = 11
|
|
#define BS_FAT32_FILSYSTYPE 82 // Length = 8
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// FAT Types
|
|
//-----------------------------------------------------------------------------
|
|
#define FAT_TYPE_FAT12 1
|
|
#define FAT_TYPE_FAT16 2
|
|
#define FAT_TYPE_FAT32 3
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// FAT32 Specific Statics
|
|
//-----------------------------------------------------------------------------
|
|
#define SIGNATURE_POSITION 510
|
|
#define SIGNATURE_VALUE 0xAA55
|
|
#define PARTITION1_TYPECODE_LOCATION 450
|
|
#define FAT32_TYPECODE1 0x0B
|
|
#define FAT32_TYPECODE2 0x0C
|
|
#define PARTITION1_LBA_BEGIN_LOCATION 454
|
|
#define PARTITION1_SIZE_LOCATION 458
|
|
|
|
#define FAT_DIR_ENTRY_SIZE 32
|
|
#define FAT_SFN_SIZE_FULL 11
|
|
#define FAT_SFN_SIZE_PARTIAL 8
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// FAT32 File Attributes and Types
|
|
//-----------------------------------------------------------------------------
|
|
#define FILE_ATTR_READ_ONLY 0x01
|
|
#define FILE_ATTR_HIDDEN 0x02
|
|
#define FILE_ATTR_SYSTEM 0x04
|
|
#define FILE_ATTR_SYSHID 0x06
|
|
#define FILE_ATTR_VOLUME_ID 0x08
|
|
#define FILE_ATTR_DIRECTORY 0x10
|
|
#define FILE_ATTR_ARCHIVE 0x20
|
|
#define FILE_ATTR_LFN_TEXT 0x0F
|
|
#define FILE_HEADER_BLANK 0x00
|
|
#define FILE_HEADER_DELETED 0xE5
|
|
#define FILE_TYPE_DIR 0x10
|
|
#define FILE_TYPE_FILE 0x20
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Time / Date details
|
|
//-----------------------------------------------------------------------------
|
|
#define FAT_TIME_HOURS_SHIFT 11
|
|
#define FAT_TIME_HOURS_MASK 0x1F
|
|
#define FAT_TIME_MINUTES_SHIFT 5
|
|
#define FAT_TIME_MINUTES_MASK 0x3F
|
|
#define FAT_TIME_SECONDS_SHIFT 0
|
|
#define FAT_TIME_SECONDS_MASK 0x1F
|
|
#define FAT_TIME_SECONDS_SCALE 2
|
|
#define FAT_DATE_YEAR_SHIFT 9
|
|
#define FAT_DATE_YEAR_MASK 0x7F
|
|
#define FAT_DATE_MONTH_SHIFT 5
|
|
#define FAT_DATE_MONTH_MASK 0xF
|
|
#define FAT_DATE_DAY_SHIFT 0
|
|
#define FAT_DATE_DAY_MASK 0x1F
|
|
#define FAT_DATE_YEAR_OFFSET 1980
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Other Defines
|
|
//-----------------------------------------------------------------------------
|
|
#define FAT32_LAST_CLUSTER 0xFFFFFFFF
|
|
#define FAT32_INVALID_CLUSTER 0xFFFFFFFF
|
|
|
|
STRUCT_PACK_BEGIN
|
|
struct fat_dir_entry STRUCT_PACK
|
|
{
|
|
uint8 Name[11];
|
|
uint8 Attr;
|
|
uint8 NTRes;
|
|
uint8 CrtTimeTenth;
|
|
uint8 CrtTime[2];
|
|
uint8 CrtDate[2];
|
|
uint8 LstAccDate[2];
|
|
uint16 FstClusHI;
|
|
uint8 WrtTime[2];
|
|
uint8 WrtDate[2];
|
|
uint16 FstClusLO;
|
|
uint32 FileSize;
|
|
} STRUCT_PACKED;
|
|
STRUCT_PACK_END
|
|
|
|
#endif
|