fat.c File Reference

#include <string.h>
#include <stddef.h>
#include <ctype.h>
#include <sys/heap.h>
#include <sys/event.h>
#include <sys/thread.h>
#include <sys/device.h>
#include <dev/ide.h>
#include <fs/fat.h>
#include <fs/typedefs.h>

Include dependency graph for fat.c:

Data Structures
struct	DSKSZTOSECPERCLUS
struct	_FAT32FileDataTime
struct	_FAT32DirectoryEntry
struct	_FAT32DirectoryEntryLong
struct	_FAT32FileSystemInformation
struct	_FAT32PartitionEntry
struct	_FAT32PartionTable
struct	_bpbfat16
struct	_bpbfat32
union	_bpboffset36
struct	_FAT32BootRecord
struct	_fat_entry_table16
struct	_fat_entry_table32
union	_fat_dir_table
struct	_drive_info
struct	_fhandle
struct	_atapi_pvd
struct	_ATAPIDirectoryRecord
Defines
#define	__FAT_C__
#define	FAT_OK   0
#define	FAT_ERROR   -1
#define	FAT_ERROR_EOF   -2
#define	FAT_ERROR_IDE   -3
#define	NUTDEV_OK   0
#define	NUTDEV_ERROR   -1
#define	FAT_MAX_DRIVE   2
#define	ZIP_DRIVE_BR_SECTOR   32
#define	BPB_RsvdSecCnt   32
#define	BPB_NumFATs   2
#define	BPB_HiddSec   63
#define	FAT32_MEDIA   0xf8
#define	FAT32_OFFSET_FSINFO   1
#define	FAT32_OFFSET_BACKUP_BOOT   6
#define	FAT16_CLUSTER_EOF   0x0000FFFF
#define	FAT16_CLUSTER_ERROR   0x0000FFF7
#define	FAT16_CLUSTER_MASK   0x0000FFFF
#define	FAT32_CLUSTER_EOF   0x0FFFFFFF
#define	FAT32_CLUSTER_ERROR   0x0FFFFFF7
#define	FAT32_CLUSTER_MASK   0x0FFFFFFF
#define	FAT_SIGNATURE   0xAA55
#define	MBR_SIGNATURE   FAT_SIGNATURE
#define	MBR_FAT32   0x0C
#define	FSINFO_FIRSTSIGNATURE   0x41615252
#define	FSINFO_FSINFOSIGNATURE   0x61417272
#define	FSINFO_SIGNATURE   FAT_SIGNATURE
#define	DIRECTORY_ATTRIBUTE_READ_ONLY   0x01
#define	DIRECTORY_ATTRIBUTE_HIDDEN   0x02
#define	DIRECTORY_ATTRIBUTE_SYSTEM_FILE   0x04
#define	DIRECTORY_ATTRIBUTE_VOLUME_ID   0x08
#define	DIRECTORY_ATTRIBUTE_DIRECTORY   0x10
#define	DIRECTORY_ATTRIBUTE_ARCHIVE   0x20
#define	DIRECTORY_ATTRIBUTE_LONG_NAME   0x0F
#define	DIRECTORY_ATTRIBUTE_LONG_NAME_MASK   0x3F
#define	FAT_NAME_LEN   8
#define	FAT_EXT_LEN   3
#define	FAT_SHORT_NAME_LEN   (FAT_NAME_LEN+FAT_EXT_LEN+1)
#define	FAT_LONG_NAME_LEN   64
#define	FLAG_FAT_IS_CDROM   0x0001
#define	FLAG_FAT_IS_ZIP   0x0002
#define	ATAPI_BOOT_RECORD   0x00
#define	ATAPI_PVD_DESC   0x01
#define	ATAPI_SVD_DESC   0x02
#define	ATAPI_VDST_DESC   0xFF
Typedefs
typedef struct _FAT32FileDataTime	FAT32_FILEDATETIME
typedef struct _FAT32FileDataTime *	PFAT32_FILEDATETIME
typedef struct _FAT32DirectoryEntry	FAT32_DIRECTORY_ENTRY
typedef struct _FAT32DirectoryEntryLong	FAT32_DIRECTORY_ENTRY_LONG
typedef struct _FAT32FileSystemInformation	FAT32_FSINFO
typedef struct _FAT32PartitionEntry	FAT32_PARTITION_ENTRY
typedef struct _FAT32PartionTable	FAT32_PARTITION_TABLE
typedef struct _bpbfat16	BPBFAT16
typedef struct _bpbfat32	BPBFAT32
typedef union _bpboffset36	BPBOFFSET36
typedef struct _FAT32BootRecord	FAT32_BOOT_RECORD
typedef struct _FAT32BootRecord *	PFAT32_BOOT_RECORD
typedef struct _fat_entry_table16	FAT_ENTRY_TABLE16
typedef struct _fat_entry_table32	FAT_ENTRY_TABLE32
typedef union _fat_dir_table	FAT_DIR_TABLE
typedef struct _drive_info	DRIVE_INFO
typedef struct _fhandle	FHANDLE
typedef struct _atapi_pvd	ATAPI_PVD
typedef struct _ATAPIDirectoryRecord	ATAPI2_DIRECTORY_RECORD
Functions
void	FATLock (void)
void	FATFree (void)
void	FATSemaInit (void)
long	FATFileSize (NUTFILE *hNUTFile)
int	FATFileRead (NUTFILE *hNUTFile, void *pData, int nSize)
Variables
NUTDEVICE	devFATC

---

Define Documentation

#define __FAT_C__

#define FAT_OK   0

#define FAT_ERROR   -1

#define FAT_ERROR_EOF   -2

Referenced by FATFileRead().

#define FAT_ERROR_IDE   -3

Referenced by FATFileRead().

#define NUTDEV_OK   0

#define NUTDEV_ERROR   -1

Referenced by FATFileRead(), and FATFileSize().

#define FAT_MAX_DRIVE   2

#define ZIP_DRIVE_BR_SECTOR   32

#define BPB_RsvdSecCnt   32

#define BPB_NumFATs   2

#define BPB_HiddSec   63

#define FAT32_MEDIA   0xf8

#define FAT32_OFFSET_FSINFO   1

#define FAT32_OFFSET_BACKUP_BOOT   6

#define FAT16_CLUSTER_EOF   0x0000FFFF

#define FAT16_CLUSTER_ERROR   0x0000FFF7

#define FAT16_CLUSTER_MASK   0x0000FFFF

#define FAT32_CLUSTER_EOF   0x0FFFFFFF

#define FAT32_CLUSTER_ERROR   0x0FFFFFF7

#define FAT32_CLUSTER_MASK   0x0FFFFFFF

#define FAT_SIGNATURE   0xAA55

#define MBR_SIGNATURE   FAT_SIGNATURE

#define MBR_FAT32   0x0C

#define FSINFO_FIRSTSIGNATURE   0x41615252

#define FSINFO_FSINFOSIGNATURE   0x61417272

#define FSINFO_SIGNATURE   FAT_SIGNATURE

#define DIRECTORY_ATTRIBUTE_READ_ONLY   0x01

#define DIRECTORY_ATTRIBUTE_HIDDEN   0x02

#define DIRECTORY_ATTRIBUTE_SYSTEM_FILE   0x04

#define DIRECTORY_ATTRIBUTE_VOLUME_ID   0x08

#define DIRECTORY_ATTRIBUTE_DIRECTORY   0x10

#define DIRECTORY_ATTRIBUTE_ARCHIVE   0x20

#define DIRECTORY_ATTRIBUTE_LONG_NAME   0x0F

#define DIRECTORY_ATTRIBUTE_LONG_NAME_MASK   0x3F

#define FAT_NAME_LEN   8

#define FAT_EXT_LEN   3

#define FAT_SHORT_NAME_LEN   (FAT_NAME_LEN+FAT_EXT_LEN+1)

#define FAT_LONG_NAME_LEN   64

#define FLAG_FAT_IS_CDROM   0x0001

#define FLAG_FAT_IS_ZIP   0x0002

#define ATAPI_BOOT_RECORD   0x00

#define ATAPI_PVD_DESC   0x01

#define ATAPI_SVD_DESC   0x02

#define ATAPI_VDST_DESC   0xFF

---

Typedef Documentation

typedef struct _FAT32FileDataTime FAT32_FILEDATETIME

typedef struct _FAT32FileDataTime * PFAT32_FILEDATETIME

typedef struct _FAT32DirectoryEntry FAT32_DIRECTORY_ENTRY

typedef struct _FAT32DirectoryEntryLong FAT32_DIRECTORY_ENTRY_LONG

typedef struct _FAT32FileSystemInformation FAT32_FSINFO

typedef struct _FAT32PartitionEntry FAT32_PARTITION_ENTRY

typedef struct _FAT32PartionTable FAT32_PARTITION_TABLE

typedef struct _bpbfat16 BPBFAT16

typedef struct _bpbfat32 BPBFAT32

typedef union _bpboffset36 BPBOFFSET36

typedef struct _FAT32BootRecord FAT32_BOOT_RECORD

typedef struct _FAT32BootRecord * PFAT32_BOOT_RECORD

typedef struct _fat_entry_table16 FAT_ENTRY_TABLE16

typedef struct _fat_entry_table32 FAT_ENTRY_TABLE32

typedef union _fat_dir_table FAT_DIR_TABLE

typedef struct _drive_info DRIVE_INFO

typedef struct _fhandle FHANDLE

typedef struct _atapi_pvd ATAPI_PVD

typedef struct _ATAPIDirectoryRecord ATAPI2_DIRECTORY_RECORD

---

Function Documentation

void FATLock

(

void

)

References NutEventWait().

Referenced by FATFileRead(), and FATFileSize().

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void FATFree

(

void

)

References NutEventPost().

Referenced by FATFileRead(), and FATFileSize().

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void FATSemaInit

(

void

)

References NutEventPost().

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long FATFileSize

(

NUTFILE *

hNUTFile

)

References _fhandle::dwFileSize, FATFree(), FATLock(), _NUTFILE::nf_fcb, NULL, and NUTDEV_ERROR.

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int FATFileRead	(	NUTFILE *	hNUTFile,
		void *	pData,
		int	nSize
	)

References _drive_info::bDevice, _fhandle::dwClusterPointer, _drive_info::dwClusterSize, _fhandle::dwFilePointer, _fhandle::dwFileSize, _fhandle::dwReadCluster, FAT_ERROR_EOF, FAT_ERROR_IDE, FATFree(), FATLock(), IDE_OK, IDEReadSectors(), memcpy(), _fhandle::nEOF, _NUTFILE::nf_fcb, _fhandle::nLastError, NULL, NUTDEV_ERROR, _fhandle::pDrive, TRUE, and _drive_info::wSectorSize.

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---

Variable Documentation

NUTDEVICE devFATC

Initial value:

 {
    0,                          
    
    {'F', 'A', 'T', '_', 'C', 0, 0, 0, 0}
    ,

    IFTYP_STREAM,               
    2,                          
    0,                          
    0,                          
    0,                          
    FATInit,                    
    0,                          
    FATFileRead,                
    FATFileWrite,               

    FATFileWriteP,              

    FATFileOpen,                
    FATFileClose,               
    FATFileSize
}