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ff.c
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/*----------------------------------------------------------------------------/
/ FatFs - FAT file system module R0.09b (C)ChaN, 2013
/-----------------------------------------------------------------------------/
/ FatFs module is a generic FAT file system module for small embedded systems.
/ This is a free software that opened for education, research and commercial
/ developments under license policy of following terms.
/
/ Copyright (C) 2013, ChaN, all right reserved.
/
/ * The FatFs module is a free software and there is NO WARRANTY.
/ * No restriction on use. You can use, modify and redistribute it for
/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
/ * Redistributions of source code must retain the above copyright notice.
/
/-----------------------------------------------------------------------------/
/ Feb 26,'06 R0.00 Prototype.
/
/ Apr 29,'06 R0.01 First stable version.
/
/ Jun 01,'06 R0.02 Added FAT12 support.
/ Removed unbuffered mode.
/ Fixed a problem on small (<32M) partition.
/ Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
/
/ Sep 22,'06 R0.03 Added f_rename().
/ Changed option _FS_MINIMUM to _FS_MINIMIZE.
/ Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast.
/ Fixed f_mkdir() creates incorrect directory on FAT32.
/
/ Feb 04,'07 R0.04 Supported multiple drive system.
/ Changed some interfaces for multiple drive system.
/ Changed f_mountdrv() to f_mount().
/ Added f_mkfs().
/ Apr 01,'07 R0.04a Supported multiple partitions on a physical drive.
/ Added a capability of extending file size to f_lseek().
/ Added minimization level 3.
/ Fixed an endian sensitive code in f_mkfs().
/ May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
/ Added FSInfo support.
/ Fixed DBCS name can result FR_INVALID_NAME.
/ Fixed short seek (<= csize) collapses the file object.
/
/ Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs().
/ Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
/ Fixed f_mkdir() on FAT32 creates incorrect directory.
/ Feb 03,'08 R0.05a Added f_truncate() and f_utime().
/ Fixed off by one error at FAT sub-type determination.
/ Fixed btr in f_read() can be mistruncated.
/ Fixed cached sector is not flushed when create and close without write.
/
/ Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets().
/ Improved performance of f_lseek() on moving to the same or following cluster.
/
/ Apr 01,'09 R0.07 Merged Tiny-FatFs as a configuration option. (_FS_TINY)
/ Added long file name feature.
/ Added multiple code page feature.
/ Added re-entrancy for multitask operation.
/ Added auto cluster size selection to f_mkfs().
/ Added rewind option to f_readdir().
/ Changed result code of critical errors.
/ Renamed string functions to avoid name collision.
/ Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
/ Added multiple sector size feature.
/ Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
/ Fixed wrong cache control in f_lseek().
/ Added relative path feature.
/ Added f_chdir() and f_chdrive().
/ Added proper case conversion to extended char.
/ Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
/ Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
/ Fixed name matching error on the 13 char boundary.
/ Added a configuration option, _LFN_UNICODE.
/ Changed f_readdir() to return the SFN with always upper case on non-LFN cfg.
/
/ May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN = 3)
/ Added file lock feature. (_FS_SHARE)
/ Added fast seek feature. (_USE_FASTSEEK)
/ Changed some types on the API, XCHAR->TCHAR.
/ Changed fname member in the FILINFO structure on Unicode cfg.
/ String functions support UTF-8 encoding files on Unicode cfg.
/ Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2)
/ Added sector erase feature. (_USE_ERASE)
/ Moved file lock semaphore table from fs object to the bss.
/ Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'.
/ Fixed f_mkfs() creates wrong FAT32 volume.
/ Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write().
/ f_lseek() reports required table size on creating CLMP.
/ Extended format syntax of f_printf function.
/ Ignores duplicated directory separators in given path name.
/
/ Sep 06,'11 R0.09 f_mkfs() supports multiple partition to finish the multiple partition feature.
/ Added f_fdisk(). (_MULTI_PARTITION = 2)
/ Aug 27,'12 R0.09a Fixed assertion failure due to OS/2 EA on FAT12/16 volume.
/ Changed f_open() and f_opendir reject null object pointer to avoid crash.
/ Changed option name _FS_SHARE to _FS_LOCK.
/ Jan 24,'13 R0.09b Added f_setlabel() and f_getlabel(). (_USE_LABEL = 1)
/---------------------------------------------------------------------------*/
#include "ff.h" /* FatFs configurations and declarations */
#include "diskio.h" /* Declarations of low level disk I/O functions */
/*--------------------------------------------------------------------------
Module Private Definitions
---------------------------------------------------------------------------*/
#if _FATFS != 82786 /* Revision ID */
#error Wrong include file (ff.h).
#endif
/* Definitions on sector size */
#if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096
#error Wrong sector size.
#endif
#if _MAX_SS != 512
#define SS(fs) ((fs)->ssize) /* Variable sector size */
#else
#define SS(fs) 512U /* Fixed sector size */
#endif
/* Reentrancy related */
#if _FS_REENTRANT
#if _USE_LFN == 1
#error Static LFN work area must not be used in re-entrant configuration.
#endif
#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
#else
#define ENTER_FF(fs)
#define LEAVE_FF(fs, res) return res
#endif
#define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
/* File access control feature */
#if _FS_LOCK
#if _FS_READONLY
#error _FS_LOCK must be 0 on read-only cfg.
#endif
typedef struct {
FATFS *fs; /* File ID 1, volume (NULL:blank entry) */
DWORD clu; /* File ID 2, directory */
WORD idx; /* File ID 3, directory index */
WORD ctr; /* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */
} FILESEM;
#endif
/* DBCS code ranges and SBCS extend char conversion table */
#if _CODE_PAGE == 932 /* Japanese Shift-JIS */
#define _DF1S 0x81 /* DBC 1st byte range 1 start */
#define _DF1E 0x9F /* DBC 1st byte range 1 end */
#define _DF2S 0xE0 /* DBC 1st byte range 2 start */
#define _DF2E 0xFC /* DBC 1st byte range 2 end */
#define _DS1S 0x40 /* DBC 2nd byte range 1 start */
#define _DS1E 0x7E /* DBC 2nd byte range 1 end */
#define _DS2S 0x80 /* DBC 2nd byte range 2 start */
#define _DS2E 0xFC /* DBC 2nd byte range 2 end */
#elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
#define _DF1S 0x81
#define _DF1E 0xFE
#define _DS1S 0x40
#define _DS1E 0x7E
#define _DS2S 0x80
#define _DS2E 0xFE
#elif _CODE_PAGE == 949 /* Korean */
#define _DF1S 0x81
#define _DF1E 0xFE
#define _DS1S 0x41
#define _DS1E 0x5A
#define _DS2S 0x61
#define _DS2E 0x7A
#define _DS3S 0x81
#define _DS3E 0xFE
#elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
#define _DF1S 0x81
#define _DF1E 0xFE
#define _DS1S 0x40
#define _DS1E 0x7E
#define _DS2S 0xA1
#define _DS2E 0xFE
#elif _CODE_PAGE == 437 /* U.S. (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F,0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 720 /* Arabic (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x45,0x41,0x84,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x49,0x49,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 737 /* Greek (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 775 /* Baltic (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 852 /* Latin 2 (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F,0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0x9F, \
0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
#elif _CODE_PAGE == 855 /* Cyrillic (OEM) */
#define _DF1S 0
#define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F,0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 857 /* Turkish (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x98,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 862 /* Hebrew (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 866 /* Russian (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 1250 /* Central Europe (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xA3,0xB4,0xB5,0xB6,0xB7,0xB8,0xA5,0xAA,0xBB,0xBC,0xBD,0xBC,0xAF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
#elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x82,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x80,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
0xA0,0xA2,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB2,0xA5,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xA3,0xBD,0xBD,0xAF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF}
#elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0xAd,0x9B,0x8C,0x9D,0xAE,0x9F, \
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
#elif _CODE_PAGE == 1253 /* Greek (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xA2,0xB8,0xB9,0xBA, \
0xE0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xFB,0xBC,0xFD,0xBF,0xFF}
#elif _CODE_PAGE == 1254 /* Turkish (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x9D,0x9E,0x9F, \
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
#elif _CODE_PAGE == 1255 /* Hebrew (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 1256 /* Arabic (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x8C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0x41,0xE1,0x41,0xE3,0xE4,0xE5,0xE6,0x43,0x45,0x45,0x45,0x45,0xEC,0xED,0x49,0x49,0xF0,0xF1,0xF2,0xF3,0x4F,0xF5,0xF6,0xF7,0xF8,0x55,0xFA,0x55,0x55,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 1257 /* Baltic (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xBC,0xBD,0xBE,0xAF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
#elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0xAC,0x9D,0x9E,0x9F, \
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xEC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xFE,0x9F}
#elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
#if _USE_LFN
#error Cannot use LFN feature without valid code page.
#endif
#define _DF1S 0
#else
#error Unknown code page
#endif
/* Character code support macros */
#define IsUpper(c) (((c)>='A')&&((c)<='Z'))
#define IsLower(c) (((c)>='a')&&((c)<='z'))
#define IsDigit(c) (((c)>='0')&&((c)<='9'))
#if _DF1S /* Code page is DBCS */
#ifdef _DF2S /* Two 1st byte areas */
#define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
#else /* One 1st byte area */
#define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
#endif
#ifdef _DS3S /* Three 2nd byte areas */
#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
#else /* Two 2nd byte areas */
#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
#endif
#else /* Code page is SBCS */
#define IsDBCS1(c) 0
#define IsDBCS2(c) 0
#endif /* _DF1S */
/* Name status flags */
#define NS 11 /* Index of name status byte in fn[] */
#define NS_LOSS 0x01 /* Out of 8.3 format */
#define NS_LFN 0x02 /* Force to create LFN entry */
#define NS_LAST 0x04 /* Last segment */
#define NS_BODY 0x08 /* Lower case flag (body) */
#define NS_EXT 0x10 /* Lower case flag (ext) */
#define NS_DOT 0x20 /* Dot entry */
/* FAT sub-type boundaries */
/* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */
#define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */
#define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */
/* FatFs refers the members in the FAT structures as byte array instead of
/ structure member because the structure is not binary compatible between
/ different platforms */
#define BS_jmpBoot 0 /* Jump instruction (3) */
#define BS_OEMName 3 /* OEM name (8) */
#define BPB_BytsPerSec 11 /* Sector size [byte] (2) */
#define BPB_SecPerClus 13 /* Cluster size [sector] (1) */
#define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */
#define BPB_NumFATs 16 /* Number of FAT copies (1) */
#define BPB_RootEntCnt 17 /* Number of root dir entries for FAT12/16 (2) */
#define BPB_TotSec16 19 /* Volume size [sector] (2) */
#define BPB_Media 21 /* Media descriptor (1) */
#define BPB_FATSz16 22 /* FAT size [sector] (2) */
#define BPB_SecPerTrk 24 /* Track size [sector] (2) */
#define BPB_NumHeads 26 /* Number of heads (2) */
#define BPB_HiddSec 28 /* Number of special hidden sectors (4) */
#define BPB_TotSec32 32 /* Volume size [sector] (4) */
#define BS_DrvNum 36 /* Physical drive number (2) */
#define BS_BootSig 38 /* Extended boot signature (1) */
#define BS_VolID 39 /* Volume serial number (4) */
#define BS_VolLab 43 /* Volume label (8) */
#define BS_FilSysType 54 /* File system type (1) */
#define BPB_FATSz32 36 /* FAT size [sector] (4) */
#define BPB_ExtFlags 40 /* Extended flags (2) */
#define BPB_FSVer 42 /* File system version (2) */
#define BPB_RootClus 44 /* Root dir first cluster (4) */
#define BPB_FSInfo 48 /* Offset of FSInfo sector (2) */
#define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */
#define BS_DrvNum32 64 /* Physical drive number (2) */
#define BS_BootSig32 66 /* Extended boot signature (1) */
#define BS_VolID32 67 /* Volume serial number (4) */
#define BS_VolLab32 71 /* Volume label (8) */
#define BS_FilSysType32 82 /* File system type (1) */
#define FSI_LeadSig 0 /* FSI: Leading signature (4) */
#define FSI_StrucSig 484 /* FSI: Structure signature (4) */
#define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */
#define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */
#define MBR_Table 446 /* MBR: Partition table offset (2) */
#define SZ_PTE 16 /* MBR: Size of a partition table entry */
#define BS_55AA 510 /* Boot sector signature (2) */
#define DIR_Name 0 /* Short file name (11) */
#define DIR_Attr 11 /* Attribute (1) */
#define DIR_NTres 12 /* NT flag (1) */
#define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */
#define DIR_CrtTime 14 /* Created time (2) */
#define DIR_CrtDate 16 /* Created date (2) */
#define DIR_LstAccDate 18 /* Last accessed date (2) */
#define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */
#define DIR_WrtTime 22 /* Modified time (2) */
#define DIR_WrtDate 24 /* Modified date (2) */
#define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */
#define DIR_FileSize 28 /* File size (4) */
#define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */
#define LDIR_Attr 11 /* LFN attribute (1) */
#define LDIR_Type 12 /* LFN type (1) */
#define LDIR_Chksum 13 /* Sum of corresponding SFN entry */
#define LDIR_FstClusLO 26 /* Filled by zero (0) */
#define SZ_DIR 32 /* Size of a directory entry */
#define LLE 0x40 /* Last long entry flag in LDIR_Ord */
#define DDE 0xE5 /* Deleted directory entry mark in DIR_Name[0] */
#define NDDE 0x05 /* Replacement of the character collides with DDE */
/*------------------------------------------------------------*/
/* Module private work area */
/*------------------------------------------------------------*/
/* Note that uninitialized variables with static duration are
/ zeroed/nulled at start-up. If not, the compiler or start-up
/ routine is out of ANSI-C standard.
*/
#if _VOLUMES
static
FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */
#else
#error Number of volumes must not be 0.
#endif
static
WORD Fsid; /* File system mount ID */
#if _FS_RPATH
static
BYTE CurrVol; /* Current drive */
#endif
#if _FS_LOCK
static
FILESEM Files[_FS_LOCK]; /* File lock semaphores */
#endif
#if _USE_LFN == 0 /* No LFN feature */
#define DEF_NAMEBUF BYTE sfn[12]
#define INIT_BUF(dobj) (dobj).fn = sfn
#define FREE_BUF()
#elif _USE_LFN == 1 /* LFN feature with static working buffer */
static WCHAR LfnBuf[_MAX_LFN+1];
#define DEF_NAMEBUF BYTE sfn[12]
#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
#define FREE_BUF()
#elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */
#define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1]
#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; }
#define FREE_BUF()
#elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */
#define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn
#define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \
if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \
(dobj).lfn = lfn; (dobj).fn = sfn; }
#define FREE_BUF() ff_memfree(lfn)
#else
#error Wrong LFN configuration.
#endif
#ifdef _EXCVT
static
const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for extended chars */
#endif
/*--------------------------------------------------------------------------
Module Private Functions
---------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------*/
/* String functions */
/*-----------------------------------------------------------------------*/
/* Copy memory to memory */
static
void mem_cpy (void* dst, const void* src, UINT cnt) {
BYTE *d = (BYTE*)dst;
const BYTE *s = (const BYTE*)src;
#if _WORD_ACCESS == 1
while (cnt >= sizeof (int)) {
*(int*)d = *(int*)s;
d += sizeof (int); s += sizeof (int);
cnt -= sizeof (int);
}
#endif
while (cnt--)
*d++ = *s++;
}
/* Fill memory */
static
void mem_set (void* dst, int val, UINT cnt) {
BYTE *d = (BYTE*)dst;
while (cnt--)
*d++ = (BYTE)val;
}
/* Compare memory to memory */
static
int mem_cmp (const void* dst, const void* src, UINT cnt) {
const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
int r = 0;
while (cnt-- && (r = *d++ - *s++) == 0) ;
return r;
}
/* Check if chr is contained in the string */
static
int chk_chr (const char* str, int chr) {
while (*str && *str != chr) str++;
return *str;
}
/*-----------------------------------------------------------------------*/
/* Request/Release grant to access the volume */
/*-----------------------------------------------------------------------*/
#if _FS_REENTRANT
static
int lock_fs (
FATFS *fs /* File system object */
)
{
return ff_req_grant(fs->sobj);
}
static
void unlock_fs (
FATFS *fs, /* File system object */
FRESULT res /* Result code to be returned */
)
{
if (fs &&
res != FR_NOT_ENABLED &&
res != FR_INVALID_DRIVE &&
res != FR_INVALID_OBJECT &&
res != FR_TIMEOUT) {
ff_rel_grant(fs->sobj);
}
}
#endif
/*-----------------------------------------------------------------------*/
/* File lock control functions */
/*-----------------------------------------------------------------------*/
#if _FS_LOCK
static
FRESULT chk_lock ( /* Check if the file can be accessed */
DIR* dj, /* Directory object pointing the file to be checked */
int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
)
{
UINT i, be;
/* Search file semaphore table */
for (i = be = 0; i < _FS_LOCK; i++) {
if (Files[i].fs) { /* Existing entry */
if (Files[i].fs == dj->fs && /* Check if the file matched with an open file */
Files[i].clu == dj->sclust &&
Files[i].idx == dj->index) break;
} else { /* Blank entry */
be++;
}
}
if (i == _FS_LOCK) /* The file is not opened */
return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new file? */
/* The file has been opened. Reject any open against writing file and all write mode open */
return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
}
static
int enq_lock (void) /* Check if an entry is available for a new file */
{
UINT i;
for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
return (i == _FS_LOCK) ? 0 : 1;
}
static
UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */
DIR* dj, /* Directory object pointing the file to register or increment */
int acc /* Desired access mode (0:Read, !0:Write) */
)
{
UINT i;
for (i = 0; i < _FS_LOCK; i++) { /* Find the file */
if (Files[i].fs == dj->fs &&
Files[i].clu == dj->sclust &&
Files[i].idx == dj->index) break;
}
if (i == _FS_LOCK) { /* Not opened. Register it as new. */
for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
if (i == _FS_LOCK) return 0; /* No space to register (int err) */
Files[i].fs = dj->fs;
Files[i].clu = dj->sclust;
Files[i].idx = dj->index;
Files[i].ctr = 0;
}
if (acc && Files[i].ctr) return 0; /* Access violation (int err) */
Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
return i + 1;
}
static
FRESULT dec_lock ( /* Decrement file open counter */
UINT i /* Semaphore index */
)
{
WORD n;
FRESULT res;
if (--i < _FS_LOCK) {
n = Files[i].ctr;
if (n == 0x100) n = 0;
if (n) n--;
Files[i].ctr = n;
if (!n) Files[i].fs = 0;
res = FR_OK;
} else {
res = FR_INT_ERR;
}
return res;
}
static
void clear_lock ( /* Clear lock entries of the volume */
FATFS *fs
)
{
UINT i;
for (i = 0; i < _FS_LOCK; i++) {
if (Files[i].fs == fs) Files[i].fs = 0;
}
}
#endif
/*-----------------------------------------------------------------------*/
/* Move/Flush disk access window */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT sync_window (
FATFS *fs /* File system object */
)
{
DWORD wsect;
UINT nf;
if (fs->wflag) { /* Write back the sector if it is dirty */
wsect = fs->winsect; /* Current sector number */
if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK)
return FR_DISK_ERR;
fs->wflag = 0;
if (wsect >= fs->fatbase && wsect < (fs->fatbase + fs->fsize)) { /* In FAT area? */
for (nf = fs->n_fats; nf >= 2; nf--) { /* Reflect the change to all FAT copies */
wsect += fs->fsize;
disk_write(fs->drv, fs->win, wsect, 1);
}
}
}
return FR_OK;
}
#endif
static
FRESULT move_window (
FATFS *fs, /* File system object */
DWORD sector /* Sector number to make appearance in the fs->win[] */
)
{
if (sector != fs->winsect) { /* Changed current window */
#if !_FS_READONLY
if (sync_window(fs) != FR_OK)
return FR_DISK_ERR;
#endif
if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK)
return FR_DISK_ERR;
fs->winsect = sector;
}
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Synchronize file system and strage device */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT sync_fs ( /* FR_OK: successful, FR_DISK_ERR: failed */
FATFS *fs /* File system object */
)
{
FRESULT res;
res = sync_window(fs);
if (res == FR_OK) {
/* Update FSInfo sector if needed */
if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
fs->winsect = 0;
/* Create FSInfo structure */
mem_set(fs->win, 0, 512);
ST_WORD(fs->win+BS_55AA, 0xAA55);
ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
/* Write it into the FSInfo sector */
disk_write(fs->drv, fs->win, fs->fsi_sector, 1);
fs->fsi_flag = 0;
}
/* Make sure that no pending write process in the physical drive */
if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
res = FR_DISK_ERR;
}
return res;
}
#endif
/*-----------------------------------------------------------------------*/
/* Get sector# from cluster# */
/*-----------------------------------------------------------------------*/
DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
FATFS *fs, /* File system object */
DWORD clst /* Cluster# to be converted */
)
{
clst -= 2;
if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */
return clst * fs->csize + fs->database;
}
/*-----------------------------------------------------------------------*/
/* FAT access - Read value of a FAT entry */
/*-----------------------------------------------------------------------*/
DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */
FATFS *fs, /* File system object */
DWORD clst /* Cluster# to get the link information */
)
{
UINT wc, bc;
BYTE *p;
if (clst < 2 || clst >= fs->n_fatent) /* Check range */
return 1;
switch (fs->fs_type) {
case FS_FAT12 :
bc = (UINT)clst; bc += bc / 2;
if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
wc = fs->win[bc % SS(fs)]; bc++;
if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
wc |= fs->win[bc % SS(fs)] << 8;
return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
case FS_FAT16 :
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break;
p = &fs->win[clst * 2 % SS(fs)];
return LD_WORD(p);
case FS_FAT32 :
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break;
p = &fs->win[clst * 4 % SS(fs)];
return LD_DWORD(p) & 0x0FFFFFFF;
}
return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */
}
/*-----------------------------------------------------------------------*/
/* FAT access - Change value of a FAT entry */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
FRESULT put_fat (
FATFS *fs, /* File system object */
DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */
DWORD val /* New value to mark the cluster */
)
{
UINT bc;
BYTE *p;
FRESULT res;
if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
res = FR_INT_ERR;
} else {
switch (fs->fs_type) {
case FS_FAT12 :
bc = (UINT)clst; bc += bc / 2;
res = move_window(fs, fs->fatbase + (bc / SS(fs)));
if (res != FR_OK) break;
p = &fs->win[bc % SS(fs)];
*p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
bc++;
fs->wflag = 1;
res = move_window(fs, fs->fatbase + (bc / SS(fs)));
if (res != FR_OK) break;
p = &fs->win[bc % SS(fs)];
*p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
break;
case FS_FAT16 :
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
if (res != FR_OK) break;
p = &fs->win[clst * 2 % SS(fs)];
ST_WORD(p, (WORD)val);
break;
case FS_FAT32 :
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
if (res != FR_OK) break;
p = &fs->win[clst * 4 % SS(fs)];
val |= LD_DWORD(p) & 0xF0000000;
ST_DWORD(p, val);
break;
default :
res = FR_INT_ERR;
}
fs->wflag = 1;
}
return res;
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* FAT handling - Remove a cluster chain */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT remove_chain (
FATFS *fs, /* File system object */
DWORD clst /* Cluster# to remove a chain from */
)
{
FRESULT res;
DWORD nxt;
#if _USE_ERASE
DWORD scl = clst, ecl = clst, rt[2];
#endif
if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
res = FR_INT_ERR;
} else {
res = FR_OK;
while (clst < fs->n_fatent) { /* Not a last link? */
nxt = get_fat(fs, clst); /* Get cluster status */
if (nxt == 0) break; /* Empty cluster? */
if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
if (res != FR_OK) break;
if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */
fs->free_clust++;
fs->fsi_flag = 1;
}
#if _USE_ERASE
if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
ecl = nxt;
} else { /* End of contiguous clusters */
rt[0] = clust2sect(fs, scl); /* Start sector */
rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */
disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, rt); /* Erase the block */
scl = ecl = nxt;
}
#endif
clst = nxt; /* Next cluster */
}
}
return res;
}
#endif
/*-----------------------------------------------------------------------*/
/* FAT handling - Stretch or Create a cluster chain */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static