ff.c File Reference

#include "ff.h"
#include "diskio.h"

Macros
#define	_DF1E   0x9F /* DBC 1st byte range 1 end */
#define	_DF1S   0x81 /* DBC 1st byte range 1 start */
#define	_DF2E   0xFC /* DBC 1st byte range 2 end */
#define	_DF2S   0xE0 /* DBC 1st byte range 2 start */
#define	_DS1E   0x7E /* DBC 2nd byte range 1 end */
#define	_DS1S   0x40 /* DBC 2nd byte range 1 start */
#define	_DS2E   0xFC /* DBC 2nd byte range 2 end */
#define	_DS2S   0x80 /* DBC 2nd byte range 2 start */
#define	ABORT(fs, res)   { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
#define	BPB_BkBootSec   50 /* Offset of backup boot sectot (2) */
#define	BPB_BytsPerSec   11 /* Sector size [byte] (2) */
#define	BPB_ExtFlags   40 /* Extended flags (2) */
#define	BPB_FATSz16   22 /* FAT size [sector] (2) */
#define	BPB_FATSz32   36 /* FAT size [sector] (4) */
#define	BPB_FSInfo   48 /* Offset of FSInfo sector (2) */
#define	BPB_FSVer   42 /* File system version (2) */
#define	BPB_HiddSec   28 /* Number of special hidden sectors (4) */
#define	BPB_Media   21 /* Media descriptor (1) */
#define	BPB_NumFATs   16 /* Number of FAT copies (1) */
#define	BPB_NumHeads   26 /* Number of heads (2) */
#define	BPB_RootClus   44 /* Root dir first cluster (4) */
#define	BPB_RootEntCnt   17 /* Number of root dir entries for FAT12/16 (2) */
#define	BPB_RsvdSecCnt   14 /* Size of reserved area [sector] (2) */
#define	BPB_SecPerClus   13 /* Cluster size [sector] (1) */
#define	BPB_SecPerTrk   24 /* Track size [sector] (2) */
#define	BPB_TotSec16   19 /* Volume size [sector] (2) */
#define	BPB_TotSec32   32 /* Volume size [sector] (4) */
#define	BS_55AA   510 /* Boot sector signature (2) */
#define	BS_BootSig   38 /* Extended boot signature (1) */
#define	BS_BootSig32   66 /* Extended boot signature (1) */
#define	BS_DrvNum   36 /* Physical drive number (2) */
#define	BS_DrvNum32   64 /* Physical drive number (2) */
#define	BS_FilSysType   54 /* File system type (1) */
#define	BS_FilSysType32   82 /* File system type (1) */
#define	BS_jmpBoot   0 /* Jump instruction (3) */
#define	BS_OEMName   3 /* OEM name (8) */
#define	BS_VolID   39 /* Volume serial number (4) */
#define	BS_VolID32   67 /* Volume serial number (4) */
#define	BS_VolLab   43 /* Volume label (8) */
#define	BS_VolLab32   71 /* Volume label (8) */
#define	DDE   0xE5 /* Deleted directory enrty mark in DIR_Name[0] */
#define	DEF_NAMEBUF   BYTE sfn[12]
#define	DIR_Attr   11 /* Attribute (1) */
#define	DIR_CrtDate   16 /* Created date (2) */
#define	DIR_CrtTime   14 /* Created time (2) */
#define	DIR_FileSize   28 /* File size (4) */
#define	DIR_FstClusHI   20 /* Higher 16-bit of first cluster (2) */
#define	DIR_FstClusLO   26 /* Lower 16-bit of first cluster (2) */
#define	DIR_Name   0 /* Short file name (11) */
#define	DIR_NTres   12 /* NT flag (1) */
#define	DIR_WrtDate   24 /* Modified date (2) */
#define	DIR_WrtTime   22 /* Modified time (2) */
#define	ENTER_FF(fs)
#define	FREE_BUF()
#define	FSI_Free_Count   488 /* FSI: Number of free clusters (4) */
#define	FSI_LeadSig   0 /* FSI: Leading signature (4) */
#define	FSI_Nxt_Free   492 /* FSI: Last allocated cluster (4) */
#define	FSI_StrucSig   484 /* FSI: Structure signature (4) */
#define	INIT_BUF(dobj)   (dobj).fn = sfn
#define	IsDBCS1(c)   (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
#define	IsDBCS2(c)   (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
#define	IsDigit(c)   (((c)>='0')&&((c)<='9'))
#define	IsLower(c)   (((c)>='a')&&((c)<='z'))
#define	IsUpper(c)   (((c)>='A')&&((c)<='Z'))
#define	LD_CLUST(dir)   (((DWORD)LD_WORD(dir+DIR_FstClusHI)<<16) | LD_WORD(dir+DIR_FstClusLO))
#define	LDIR_Attr   11 /* LFN attribute (1) */
#define	LDIR_Chksum   13 /* Sum of corresponding SFN entry */
#define	LDIR_FstClusLO   26 /* Filled by zero (0) */
#define	LDIR_Ord   0 /* LFN entry order and LLE flag (1) */
#define	LDIR_Type   12 /* LFN type (1) */
#define	LEAVE_FF(fs, res)   return res
#define	LLE   0x40 /* Last long entry flag in LDIR_Ord */
#define	MBR_Table   446 /* MBR: Partition table offset (2) */
#define	MIN_FAT16   4086 /* Minimum number of clusters for FAT16 */
#define	MIN_FAT32   65526 /* Minimum number of clusters for FAT32 */
#define	NDDE   0x05 /* Replacement of a character collides with DDE */
#define	NS   11 /* Index of name status byte in fn[] */
#define	NS_BODY   0x08 /* Lower case flag (body) */
#define	NS_DOT   0x20 /* Dot entry */
#define	NS_EXT   0x10 /* Lower case flag (ext) */
#define	NS_LAST   0x04 /* Last segment */
#define	NS_LFN   0x02 /* Force to create LFN entry */
#define	NS_LOSS   0x01 /* Out of 8.3 format */
#define	SS(fs)   512U /* Fixed sector size */
#define	ST_CLUST(dir, cl)   {ST_WORD(dir+DIR_FstClusLO, cl); ST_WORD(dir+DIR_FstClusHI, (DWORD)cl>>16);}
#define	SZ_DIR   32 /* Size of a directory entry */
#define	SZ_PTE   16 /* MBR: Size of a partition table entry */

Functions
static BYTE	check_fs (FATFS *fs, DWORD sect)
static int	chk_chr (const char *str, int chr)
static FRESULT	chk_mounted (const TCHAR **path, FATFS **rfs, BYTE chk_wp)
static DWORD	clust2sect (FATFS *fs, DWORD clst)
static DWORD	create_chain (FATFS *fs, DWORD clst)
static FRESULT	create_name (DIR *dj, const TCHAR **path)
static FRESULT	dir_find (DIR *dj)
static FRESULT	dir_next (DIR *dj, int stretch)
static FRESULT	dir_read (DIR *dj)
static FRESULT	dir_register (DIR *dj)
static FRESULT	dir_remove (DIR *dj)
static FRESULT	dir_sdi (DIR *dj, WORD idx)
FRESULT	f_chmod (const TCHAR *path, BYTE value, BYTE mask)
FRESULT	f_close (FIL *fp)
FRESULT	f_getfree (const TCHAR *path, DWORD *nclst, FATFS **fatfs)
FRESULT	f_lseek (FIL *fp, DWORD ofs)
FRESULT	f_mkdir (const TCHAR *path)
FRESULT	f_mount (BYTE vol, FATFS *fs)
FRESULT	f_open (FIL *fp, const TCHAR *path, BYTE mode)
FRESULT	f_opendir (DIR *dj, const TCHAR *path)
FRESULT	f_read (FIL *fp, void *buff, UINT btr, UINT *br)
FRESULT	f_readdir (DIR *dj, FILINFO *fno)
FRESULT	f_rename (const TCHAR *path_old, const TCHAR *path_new)
FRESULT	f_stat (const TCHAR *path, FILINFO *fno)
FRESULT	f_sync (FIL *fp)
FRESULT	f_truncate (FIL *fp)
FRESULT	f_unlink (const TCHAR *path)
FRESULT	f_utime (const TCHAR *path, const FILINFO *fno)
FRESULT	f_write (FIL *fp, const void *buff, UINT btw, UINT *bw)
static FRESULT	follow_path (DIR *dj, const TCHAR *path)
static DWORD	get_fat (FATFS *fs, DWORD clst)
static void	get_fileinfo (DIR *dj, FILINFO *fno)
static int	mem_cmp (const void *dst, const void *src, UINT cnt)
static void	mem_cpy (void *dst, const void *src, UINT cnt)
static void	mem_set (void *dst, int val, UINT cnt)
static FRESULT	move_window (FATFS *fs, DWORD sector)
static FRESULT	put_fat (FATFS *fs, DWORD clst, DWORD val)
static FRESULT	remove_chain (FATFS *fs, DWORD clst)
static FRESULT	sync (FATFS *fs)
static FRESULT	validate (FATFS *fs, WORD id)

Variables
static FATFS *	FatFs [_VOLUMES]
static WORD	Fsid