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micropython/lib/fatfs/ff.c

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/*----------------------------------------------------------------------------/
/ FatFs - FAT file system module R0.10c (C)ChaN, 2014
/-----------------------------------------------------------------------------/
/ 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) 2014, 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 character.
/ Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
/ Fixed f_unlink() fails to remove a sub-directory on _FS_RPATH.
/ Fixed name matching error on the 13 character 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 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().
/ 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().
/ Ignores duplicated directory separators in given path name.
/
/ Sep 06,'11 R0.09 f_mkfs() supports multiple partition to complete the multiple partition feature.
/ Added f_fdisk().
/ Aug 27,'12 R0.09a Changed f_open() and f_opendir() reject null object pointer to avoid crash.
/ Changed option name _FS_SHARE to _FS_LOCK.
/ Fixed assertion failure due to OS/2 EA on FAT12/16 volume.
/ Jan 24,'13 R0.09b Added f_setlabel() and f_getlabel().
/
/ Oct 02,'13 R0.10 Added selection of character encoding on the file. (_STRF_ENCODE)
/ Added f_closedir().
/ Added forced full FAT scan for f_getfree(). (_FS_NOFSINFO)
/ Added forced mount feature with changes of f_mount().
/ Improved behavior of volume auto detection.
/ Improved write throughput of f_puts() and f_printf().
/ Changed argument of f_chdrive(), f_mkfs(), disk_read() and disk_write().
/ Fixed f_write() can be truncated when the file size is close to 4GB.
/ Fixed f_open(), f_mkdir() and f_setlabel() can return incorrect error code.
/ Jan 15,'14 R0.10a Added arbitrary strings as drive number in the path name. (_STR_VOLUME_ID)
/ Added a configuration option of minimum sector size. (_MIN_SS)
/ 2nd argument of f_rename() can have a drive number and it will be ignored.
/ Fixed f_mount() with forced mount fails when drive number is >= 1.
/ Fixed f_close() invalidates the file object without volume lock.
/ Fixed f_closedir() returns but the volume lock is left acquired.
/ Fixed creation of an entry with LFN fails on too many SFN collisions.
/ May 19,'14 R0.10b Fixed a hard error in the disk I/O layer can collapse the directory entry.
/ Fixed LFN entry is not deleted on delete/rename an object with lossy converted SFN.
/ Nov 09,'14 R0.10c Added a configuration option for the platforms without RTC. (_FS_NORTC)
/ Fixed volume label created by Mac OS X cannot be retrieved with f_getlabel().
/ Fixed a potential problem of FAT access that can appear on disk error.
/ Fixed null pointer dereference on attempting to delete the root direcotry.
/---------------------------------------------------------------------------*/
#include "ff.h" /* Declarations of FatFs API */
#include "diskio.h" /* Declarations of disk I/O functions */
/*--------------------------------------------------------------------------
Module Private Definitions
---------------------------------------------------------------------------*/
#if _FATFS != 80376 /* Revision ID */
#error Wrong include file (ff.h).
#endif
/* Reentrancy related */
#if _FS_REENTRANT
#if _USE_LFN == 1
#error Static LFN work area cannot be used at thread-safe 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->err = (BYTE)(res); LEAVE_FF(fs, res); }
/* Definitions of sector size */
#if (_MAX_SS < _MIN_SS) || (_MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096) || (_MIN_SS != 512 && _MIN_SS != 1024 && _MIN_SS != 2048 && _MIN_SS != 4096)
#error Wrong sector size configuration
#endif
#if _MAX_SS == _MIN_SS
#define SS(fs) ((UINT)_MAX_SS) /* Fixed sector size */
#else
#define SS(fs) ((fs)->ssize) /* Variable sector size */
#endif
/* Timestamp feature */
#if _FS_NORTC
#define GET_FATTIME() ((DWORD)_NORTC_YEAR << 25 | (DWORD)_NORTC_MON << 21 | (DWORD)_NORTC_MDAY << 16)
#else
#define GET_FATTIME() get_fattime()
#endif
/* File access control feature */
#if _FS_LOCK
#if _FS_READONLY
#error _FS_LOCK must be 0 at read-only configuration
#endif
typedef struct {
FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */
DWORD clu; /* Object ID 2, directory (0:root) */
WORD idx; /* Object ID 3, directory index */
WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
} FILESEM;
#endif
/* DBCS code ranges and SBCS extend character 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 NSFLAG 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 (Differ from specs but correct for real DOS/Windows) */
#define MIN_FAT16 4086U /* Minimum number of clusters as FAT16 */
#define MIN_FAT32 65526U /* Minimum number of clusters as 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 /* x86 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 directory 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 directory 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 /* Signature word (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 */
/*------------------------------------------------------------*/
/* Remark: Uninitialized variables with static duration are
/ guaranteed zero/null at start-up. If not, either the linker
/ or start-up routine being used is out of ANSI-C standard.
*/
#if _VOLUMES < 1 || _VOLUMES > 9
#error Wrong _VOLUMES setting
#endif
static FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */
static WORD Fsid; /* File system mount ID */
#if _FS_RPATH && _VOLUMES >= 2
static BYTE CurrVol; /* Current drive */
#endif
#if _FS_LOCK
static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */
#endif
#if _USE_LFN == 0 /* Non LFN feature */
#define DEF_NAMEBUF BYTE sfn[12]
#define INIT_BUF(dobj) (dobj).fn = sfn
#define FREE_BUF()
#else
#if _MAX_LFN < 12 || _MAX_LFN > 255
#error Wrong _MAX_LFN setting
#endif
#if _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 _USE_LFN setting
#endif
#endif
#ifdef _EXCVT
static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for extended characters */
#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* dp, /* Directory object pointing the file to be checked */
int acc /* Desired access type (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 == dp->fs && /* Check if the object matched with an open object */
Files[i].clu == dp->sclust &&
Files[i].idx == dp->index) break;
} else { /* Blank entry */
be = 1;
}
}
if (i == _FS_LOCK) /* The object is not opened */
return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */
/* The object 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 object */
{
UINT i;
for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
return (i == _FS_LOCK) ? 0 : 1;
}
static
UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */
DIR* dp, /* Directory object pointing the file to register or increment */
int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
)
{
UINT i;
for (i = 0; i < _FS_LOCK; i++) { /* Find the object */
if (Files[i].fs == dp->fs &&
Files[i].clu == dp->sclust &&
Files[i].idx == dp->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 free entry to register (int err) */
Files[i].fs = dp->fs;
Files[i].clu = dp->sclust;
Files[i].idx = dp->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 object open counter */
UINT i /* Semaphore index (1..) */
)
{
WORD n;
FRESULT res;
if (--i < _FS_LOCK) { /* Shift index number origin from 0 */
n = Files[i].ctr;
if (n == 0x100) n = 0; /* If write mode open, delete the entry */
if (n) n--; /* Decrement read mode open count */
Files[i].ctr = n;
if (!n) Files[i].fs = 0; /* Delete the entry if open count gets zero */
res = FR_OK;
} else {
res = FR_INT_ERR; /* Invalid index nunber */
}
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 in the file system object */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT sync_window (
FATFS* fs /* File system object */
)
{
DWORD wsect;
UINT nf;
FRESULT res = FR_OK;
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) {
res = FR_DISK_ERR;
} else {
fs->wflag = 0;
if (wsect - fs->fatbase < fs->fsize) { /* Is it in the 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 res;
}
#endif
static
FRESULT move_window (
FATFS* fs, /* File system object */
DWORD sector /* Sector number to make appearance in the fs->win[] */
)
{
FRESULT res = FR_OK;
if (sector != fs->winsect) { /* Window offset changed? */
#if !_FS_READONLY
res = sync_window(fs); /* Write-back changes */
#endif
if (res == FR_OK) { /* Fill sector window with new data */
if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) {
sector = 0xFFFFFFFF; /* Invalidate window if data is not reliable */
res = FR_DISK_ERR;
}
fs->winsect = sector;
}
}
return res;
}
/*-----------------------------------------------------------------------*/
/* 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 == 1) {
/* Create FSINFO structure */
mem_set(fs->win, 0, SS(fs));
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 */
fs->winsect = fs->volbase + 1;
disk_write(fs->drv, fs->win, fs->winsect, 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# */
/*-----------------------------------------------------------------------*/
/* Hidden API for hacks and disk tools */
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 */
/*-----------------------------------------------------------------------*/
/* Hidden API for hacks and disk tools */
DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x0FFFFFFF:Cluster status */
FATFS* fs, /* File system object */
DWORD clst /* FAT item index (cluster#) to get the value */
)
{
UINT wc, bc;
BYTE *p;
DWORD val;
if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
val = 1; /* Internal error */
} else {
val = 0xFFFFFFFF; /* Default value falls on disk error */
switch (fs->fs_type) {
case FS_FAT12 :
bc = (UINT)clst; bc += bc / 2;
if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
wc = fs->win[bc++ % SS(fs)];
if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
wc |= fs->win[bc % SS(fs)] << 8;
val = clst & 1 ? wc >> 4 : (wc & 0xFFF);
break;
case FS_FAT16 :
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
p = &fs->win[clst * 2 % SS(fs)];
val = LD_WORD(p);
break;
case FS_FAT32 :
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
p = &fs->win[clst * 4 % SS(fs)];
val = LD_DWORD(p) & 0x0FFFFFFF;
break;
default:
val = 1; /* Internal error */
}
}
return val;
}
/*-----------------------------------------------------------------------*/
/* FAT access - Change value of a FAT entry */
/*-----------------------------------------------------------------------*/
/* Hidden API for hacks and disk tools */
#if !_FS_READONLY
FRESULT put_fat (
FATFS* fs, /* File system object */
DWORD clst, /* FAT item index (cluster#) to be set */
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;
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));
fs->wflag = 1;
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);
fs->wflag = 1;
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);
fs->wflag = 1;
break;
default :
res = FR_INT_ERR;
}
}
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_TRIM
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_TRIM
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_TRIM, 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
DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
FATFS* fs, /* File system object */
DWORD clst /* Cluster# to stretch. 0 means create a new chain. */
)
{
DWORD cs, ncl, scl;
FRESULT res;
if (clst == 0) { /* Create a new chain */
scl = fs->last_clust; /* Get suggested start point */
if (!scl || scl >= fs->n_fatent) scl = 1;
}
else { /* Stretch the current chain */
cs = get_fat(fs, clst); /* Check the cluster status */
if (cs < 2) return 1; /* Invalid value */
if (cs == 0xFFFFFFFF) return cs; /* A disk error occurred */
if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
scl = clst;
}
ncl = scl; /* Start cluster */
for (;;) {
ncl++; /* Next cluster */
if (ncl >= fs->n_fatent) { /* Check wrap around */
ncl = 2;
if (ncl > scl) return 0; /* No free cluster */
}
cs = get_fat(fs, ncl); /* Get the cluster status */
if (cs == 0) break; /* Found a free cluster */
if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */
return cs;
if (ncl == scl) return 0; /* No free cluster */
}
res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */
if (res == FR_OK && clst != 0) {
res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */
}
if (res == FR_OK) {
fs->last_clust = ncl; /* Update FSINFO */
if (fs->free_clust != 0xFFFFFFFF) {
fs->free_clust--;
fs->fsi_flag |= 1;
}
} else {
ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
}
return ncl; /* Return new cluster number or error code */
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* FAT handling - Convert offset into cluster with link map table */
/*-----------------------------------------------------------------------*/
#if _USE_FASTSEEK
static
DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
FIL* fp, /* Pointer to the file object */
DWORD ofs /* File offset to be converted to cluster# */
)
{
DWORD cl, ncl, *tbl;
tbl = fp->cltbl + 1; /* Top of CLMT */
cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */
for (;;) {
ncl = *tbl++; /* Number of cluters in the fragment */
if (!ncl) return 0; /* End of table? (error) */
if (cl < ncl) break; /* In this fragment? */
cl -= ncl; tbl++; /* Next fragment */
}
return cl + *tbl; /* Return the cluster number */
}
#endif /* _USE_FASTSEEK */
/*-----------------------------------------------------------------------*/
/* Directory handling - Set directory index */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_sdi (
DIR* dp, /* Pointer to directory object */
UINT idx /* Index of directory table */
)
{
DWORD clst, sect;
UINT ic;
dp->index = (WORD)idx; /* Current index */
clst = dp->sclust; /* Table start cluster (0:root) */
if (clst == 1 || clst >= dp->fs->n_fatent) /* Check start cluster range */
return FR_INT_ERR;
if (!clst && dp->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
clst = dp->fs->dirbase;
if (clst == 0) { /* Static table (root-directory in FAT12/16) */
if (idx >= dp->fs->n_rootdir) /* Is index out of range? */
return FR_INT_ERR;
sect = dp->fs->dirbase;
}
else { /* Dynamic table (root-directory in FAT32 or sub-directory) */
ic = SS(dp->fs) / SZ_DIR * dp->fs->csize; /* Entries per cluster */
while (idx >= ic) { /* Follow cluster chain */
clst = get_fat(dp->fs, clst); /* Get next cluster */
if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
if (clst < 2 || clst >= dp->fs->n_fatent) /* Reached to end of table or internal error */
return FR_INT_ERR;
idx -= ic;
}
sect = clust2sect(dp->fs, clst);
}
dp->clust = clst; /* Current cluster# */
if (!sect) return FR_INT_ERR;
dp->sect = sect + idx / (SS(dp->fs) / SZ_DIR); /* Sector# of the directory entry */
dp->dir = dp->fs->win + (idx % (SS(dp->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Directory handling - Move directory table index next */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
DIR* dp, /* Pointer to the directory object */
int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
)
{
DWORD clst;
UINT i;
i = dp->index + 1;
if (!(i & 0xFFFF) || !dp->sect) /* Report EOT when index has reached 65535 */
return FR_NO_FILE;
if (!(i % (SS(dp->fs) / SZ_DIR))) { /* Sector changed? */
dp->sect++; /* Next sector */
if (!dp->clust) { /* Static table */
if (i >= dp->fs->n_rootdir) /* Report EOT if it reached end of static table */
return FR_NO_FILE;
}
else { /* Dynamic table */
if (((i / (SS(dp->fs) / SZ_DIR)) & (dp->fs->csize - 1)) == 0) { /* Cluster changed? */
clst = get_fat(dp->fs, dp->clust); /* Get next cluster */
if (clst <= 1) return FR_INT_ERR;
if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
if (clst >= dp->fs->n_fatent) { /* If it reached end of dynamic table, */
#if !_FS_READONLY
UINT c;
if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT */
clst = create_chain(dp->fs, dp->clust); /* Stretch cluster chain */
if (clst == 0) return FR_DENIED; /* No free cluster */
if (clst == 1) return FR_INT_ERR;
if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
/* Clean-up stretched table */
if (sync_window(dp->fs)) return FR_DISK_ERR;/* Flush disk access window */
mem_set(dp->fs->win, 0, SS(dp->fs)); /* Clear window buffer */
dp->fs->winsect = clust2sect(dp->fs, clst); /* Cluster start sector */
for (c = 0; c < dp->fs->csize; c++) { /* Fill the new cluster with 0 */
dp->fs->wflag = 1;
if (sync_window(dp->fs)) return FR_DISK_ERR;
dp->fs->winsect++;
}
dp->fs->winsect -= c; /* Rewind window offset */
#else
if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT (this is to suppress warning) */
return FR_NO_FILE; /* Report EOT */
#endif
}
dp->clust = clst; /* Initialize data for new cluster */
dp->sect = clust2sect(dp->fs, clst);
}
}
}
dp->index = (WORD)i; /* Current index */
dp->dir = dp->fs->win + (i % (SS(dp->fs) / SZ_DIR)) * SZ_DIR; /* Current entry in the window */
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Directory handling - Reserve directory entry */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT dir_alloc (
DIR* dp, /* Pointer to the directory object */
UINT nent /* Number of contiguous entries to allocate (1-21) */
)
{
FRESULT res;
UINT n;
res = dir_sdi(dp, 0);
if (res == FR_OK) {
n = 0;
do {
res = move_window(dp->fs, dp->sect);
if (res != FR_OK) break;
if (dp->dir[0] == DDE || dp->dir[0] == 0) { /* Is it a free entry? */
if (++n == nent) break; /* A block of contiguous free entries is found */
} else {
n = 0; /* Not a blank entry. Restart to search */
}
res = dir_next(dp, 1); /* Next entry with table stretch enabled */
} while (res == FR_OK);
}
if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
return res;
}
#endif
/*-----------------------------------------------------------------------*/
/* Directory handling - Load/Store start cluster number */
/*-----------------------------------------------------------------------*/
static
DWORD ld_clust (
FATFS* fs, /* Pointer to the fs object */
BYTE* dir /* Pointer to the directory entry */
)
{
DWORD cl;
cl = LD_WORD(dir+DIR_FstClusLO);
if (fs->fs_type == FS_FAT32)
cl |= (DWORD)LD_WORD(dir+DIR_FstClusHI) << 16;
return cl;
}
#if !_FS_READONLY
static
void st_clust (
BYTE* dir, /* Pointer to the directory entry */
DWORD cl /* Value to be set */
)
{
ST_WORD(dir+DIR_FstClusLO, cl);
ST_WORD(dir+DIR_FstClusHI, cl >> 16);
}
#endif
/*-----------------------------------------------------------------------*/
/* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
/*-----------------------------------------------------------------------*/
#if _USE_LFN
static
const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN characters in the directory entry */
static
int cmp_lfn ( /* 1:Matched, 0:Not matched */
WCHAR* lfnbuf, /* Pointer to the LFN to be compared */
BYTE* dir /* Pointer to the directory entry containing a part of LFN */
)
{
UINT i, s;
WCHAR wc, uc;
i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13; /* Get offset in the LFN buffer */
s = 0; wc = 1;
do {
uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
if (wc) { /* Last character has not been processed */
wc = ff_wtoupper(uc); /* Convert it to upper case */
if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */
return 0; /* Not matched */
} else {
if (uc != 0xFFFF) return 0; /* Check filler */
}
} while (++s < 13); /* Repeat until all characters in the entry are checked */
if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i]) /* Last segment matched but different length */
return 0;
return 1; /* The part of LFN matched */
}
static
int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */
WCHAR* lfnbuf, /* Pointer to the Unicode-LFN buffer */
BYTE* dir /* Pointer to the directory entry */
)
{
UINT i, s;
WCHAR wc, uc;
i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
s = 0; wc = 1;
do {
uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
if (wc) { /* Last character has not been processed */
if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
lfnbuf[i++] = wc = uc; /* Store it */
} else {
if (uc != 0xFFFF) return 0; /* Check filler */
}
} while (++s < 13); /* Read all character in the entry */
if (dir[LDIR_Ord] & LLE) { /* Put terminator if it is the last LFN part */
if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
lfnbuf[i] = 0;
}
return 1;
}
#if !_FS_READONLY
static
void fit_lfn (
const WCHAR* lfnbuf, /* Pointer to the LFN buffer */
BYTE* dir, /* Pointer to the directory entry */
BYTE ord, /* LFN order (1-20) */
BYTE sum /* SFN sum */
)
{
UINT i, s;
WCHAR wc;
dir[LDIR_Chksum] = sum; /* Set check sum */
dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
dir[LDIR_Type] = 0;
ST_WORD(dir+LDIR_FstClusLO, 0);
i = (ord - 1) * 13; /* Get offset in the LFN buffer */
s = wc = 0;
do {
if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective character */
ST_WORD(dir+LfnOfs[s], wc); /* Put it */
if (!wc) wc = 0xFFFF; /* Padding characters following last character */
} while (++s < 13);
if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE; /* Bottom LFN part is the start of LFN sequence */
dir[LDIR_Ord] = ord; /* Set the LFN order */
}
#endif
#endif
/*-----------------------------------------------------------------------*/
/* Create numbered name */
/*-----------------------------------------------------------------------*/
#if _USE_LFN
static
void gen_numname (
BYTE* dst, /* Pointer to the buffer to store numbered SFN */
const BYTE* src, /* Pointer to SFN */
const WCHAR* lfn, /* Pointer to LFN */
UINT seq /* Sequence number */
)
{
BYTE ns[8], c;
UINT i, j;
mem_cpy(dst, src, 11);
if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */
WCHAR wc;
DWORD sr = seq;
while (*lfn) { /* Create a CRC */
wc = *lfn++;
for (i = 0; i < 16; i++) {
sr = (sr << 1) + (wc & 1);
wc >>= 1;
if (sr & 0x10000) sr ^= 0x11021;
}
}
seq = (UINT)sr;
}
/* itoa (hexdecimal) */
i = 7;
do {
c = (seq % 16) + '0';
if (c > '9') c += 7;
ns[i--] = c;
seq /= 16;
} while (seq);
ns[i] = '~';
/* Append the number */
for (j = 0; j < i && dst[j] != ' '; j++) {
if (IsDBCS1(dst[j])) {
if (j == i - 1) break;
j++;
}
}
do {
dst[j++] = (i < 8) ? ns[i++] : ' ';
} while (j < 8);
}
#endif
/*-----------------------------------------------------------------------*/
/* Calculate sum of an SFN */
/*-----------------------------------------------------------------------*/
#if _USE_LFN
static
BYTE sum_sfn (
const BYTE* dir /* Pointer to the SFN entry */
)
{
BYTE sum = 0;
UINT n = 11;
do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
return sum;
}
#endif
/*-----------------------------------------------------------------------*/
/* Directory handling - Find an object in the directory */
/*-----------------------------------------------------------------------*/
static
FRESULT dir_find (
DIR* dp /* Pointer to the directory object linked to the file name */
)
{
FRESULT res;
BYTE c, *dir;
#if _USE_LFN
BYTE a, ord, sum;
#endif
res = dir_sdi(dp, 0); /* Rewind directory object */
if (res != FR_OK) return res;
#if _USE_LFN
ord = sum = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
#endif
do {
res = move_window(dp->fs, dp->sect);
if (res != FR_OK) break;
dir = dp->dir; /* Ptr to the directory entry of current index */
c = dir[DIR_Name];
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
#if _USE_LFN /* LFN configuration */
a = dir[DIR_Attr] & AM_MASK;
if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
} else {
if (a == AM_LFN) { /* An LFN entry is found */
if (dp->lfn) {
if (c & LLE) { /* Is it start of LFN sequence? */
sum = dir[LDIR_Chksum];
c &= ~LLE; ord = c; /* LFN start order */
dp->lfn_idx = dp->index; /* Start index of LFN */
}
/* Check validity of the LFN entry and compare it with given name */
ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
}
} else { /* An SFN entry is found */
if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dir, dp->fn, 11)) break; /* SFN matched? */
ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
}
}
#else /* Non LFN configuration */
if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dp->fn, 11)) /* Is it a valid entry? */
break;
#endif
res = dir_next(dp, 0); /* Next entry */
} while (res == FR_OK);
return res;
}
/*-----------------------------------------------------------------------*/
/* Read an object from the directory */
/*-----------------------------------------------------------------------*/
#if _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2
static
FRESULT dir_read (
DIR* dp, /* Pointer to the directory object */
int vol /* Filtered by 0:file/directory or 1:volume label */
)
{
FRESULT res;
BYTE a, c, *dir;
#if _USE_LFN
BYTE ord = 0xFF, sum = 0xFF;
#endif
res = FR_NO_FILE;
while (dp->sect) {
res = move_window(dp->fs, dp->sect);
if (res != FR_OK) break;
dir = dp->dir; /* Ptr to the directory entry of current index */
c = dir[DIR_Name];
if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
a = dir[DIR_Attr] & AM_MASK;
#if _USE_LFN /* LFN configuration */
if (c == DDE || (!_FS_RPATH && c == '.') || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */
ord = 0xFF;
} else {
if (a == AM_LFN) { /* An LFN entry is found */
if (c & LLE) { /* Is it start of LFN sequence? */
sum = dir[LDIR_Chksum];
c &= ~LLE; ord = c;
dp->lfn_idx = dp->index;
}
/* Check LFN validity and capture it */
ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
} else { /* An SFN entry is found */
if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
dp->lfn_idx = 0xFFFF; /* It has no LFN. */
break;
}
}
#else /* Non LFN configuration */
if (c != DDE && (_FS_RPATH || c != '.') && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) /* Is it a valid entry? */
break;
#endif
res = dir_next(dp, 0); /* Next entry */
if (res != FR_OK) break;
}
if (res != FR_OK) dp->sect = 0;
return res;
}
#endif /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */
/*-----------------------------------------------------------------------*/
/* Register an object to the directory */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
DIR* dp /* Target directory with object name to be created */
)
{
FRESULT res;
#if _USE_LFN /* LFN configuration */
UINT n, nent;
BYTE sn[12], *fn, sum;
WCHAR *lfn;
fn = dp->fn; lfn = dp->lfn;
mem_cpy(sn, fn, 12);
if (_FS_RPATH && (sn[NSFLAG] & NS_DOT)) /* Cannot create dot entry */
return FR_INVALID_NAME;
if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
fn[NSFLAG] = 0; dp->lfn = 0; /* Find only SFN */
for (n = 1; n < 100; n++) {
gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
res = dir_find(dp); /* Check if the name collides with existing SFN */
if (res != FR_OK) break;
}
if (n == 100) return FR_DENIED; /* Abort if too many collisions */
if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
fn[NSFLAG] = sn[NSFLAG]; dp->lfn = lfn;
}
if (sn[NSFLAG] & NS_LFN) { /* When LFN is to be created, allocate entries for an SFN + LFNs. */
for (n = 0; lfn[n]; n++) ;
nent = (n + 25) / 13;
} else { /* Otherwise allocate an entry for an SFN */
nent = 1;
}
res = dir_alloc(dp, nent); /* Allocate entries */
if (res == FR_OK && --nent) { /* Set LFN entry if needed */
res = dir_sdi(dp, dp->index - nent);
if (res == FR_OK) {
sum = sum_sfn(dp->fn); /* Sum value of the SFN tied to the LFN */
do { /* Store LFN entries in bottom first */
res = move_window(dp->fs, dp->sect);
if (res != FR_OK) break;
fit_lfn(dp->lfn, dp->dir, (BYTE)nent, sum);
dp->fs->wflag = 1;
res = dir_next(dp, 0); /* Next entry */
} while (res == FR_OK && --nent);
}
}
#else /* Non LFN configuration */
res = dir_alloc(dp, 1); /* Allocate an entry for SFN */
#endif
if (res == FR_OK) { /* Set SFN entry */
res = move_window(dp->fs, dp->sect);
if (res == FR_OK) {
mem_set(dp->dir, 0, SZ_DIR); /* Clean the entry */
mem_cpy(dp->dir, dp->fn, 11); /* Put SFN */
#if _USE_LFN
dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */
#endif
dp->fs->wflag = 1;
}
}
return res;
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* Remove an object from the directory */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY && !_FS_MINIMIZE
static
FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */
DIR* dp /* Directory object pointing the entry to be removed */
)
{
FRESULT res;
#if _USE_LFN /* LFN configuration */
UINT i;
i = dp->index; /* SFN index */
res = dir_sdi(dp, (dp->lfn_idx == 0xFFFF) ? i : dp->lfn_idx); /* Goto the SFN or top of the LFN entries */
if (res == FR_OK) {
do {
res = move_window(dp->fs, dp->sect);
if (res != FR_OK) break;
mem_set(dp->dir, 0, SZ_DIR); /* Clear and mark the entry "deleted" */
*dp->dir = DDE;
dp->fs->wflag = 1;
if (dp->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
res = dir_next(dp, 0); /* Next entry */
} while (res == FR_OK);
if (res == FR_NO_FILE) res = FR_INT_ERR;
}
#else /* Non LFN configuration */
res = dir_sdi(dp, dp->index);
if (res == FR_OK) {
res = move_window(dp->fs, dp->sect);
if (res == FR_OK) {
mem_set(dp->dir, 0, SZ_DIR); /* Clear and mark the entry "deleted" */
*dp->dir = DDE;
dp->fs->wflag = 1;
}
}
#endif
return res;
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* Get file information from directory entry */
/*-----------------------------------------------------------------------*/
#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2
static
void get_fileinfo ( /* No return code */
DIR* dp, /* Pointer to the directory object */
FILINFO* fno /* Pointer to the file information to be filled */
)
{
UINT i;
TCHAR *p, c;
p = fno->fname;
if (dp->sect) { /* Get SFN */
BYTE *dir = dp->dir;
i = 0;
while (i < 11) { /* Copy name body and extension */
c = (TCHAR)dir[i++];
if (c == ' ') continue; /* Skip padding spaces */
if (c == NDDE) c = (TCHAR)DDE; /* Restore replaced DDE character */
if (i == 9) *p++ = '.'; /* Insert a . if extension is exist */
#if _USE_LFN
if (IsUpper(c) && (dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY)))
c += 0x20; /* To lower */
#if _LFN_UNICODE
if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dir[i]))
c = c << 8 | dir[i++];
c = ff_convert(c, 1); /* OEM -> Unicode */
if (!c) c = '?';
#endif
#endif
*p++ = c;
}
fno->fattrib = dir[DIR_Attr]; /* Attribute */
fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */
fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */
fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */
}
*p = 0; /* Terminate SFN string by a \0 */
#if _USE_LFN
if (fno->lfname) {
WCHAR w, *lfn;
i = 0; p = fno->lfname;
if (dp->sect && fno->lfsize && dp->lfn_idx != 0xFFFF) { /* Get LFN if available */
lfn = dp->lfn;
while ((w = *lfn++) != 0) { /* Get an LFN character */
#if !_LFN_UNICODE
w = ff_convert(w, 0); /* Unicode -> OEM */
if (!w) { i = 0; break; } /* No LFN if it could not be converted */
if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
p[i++] = (TCHAR)(w >> 8);
#endif
if (i >= fno->lfsize - 1) { i = 0; break; } /* No LFN if buffer overflow */
p[i++] = (TCHAR)w;
}
}
p[i] = 0; /* Terminate LFN string by a \0 */
}
#endif
}
#endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2*/
/*-----------------------------------------------------------------------*/
/* Pick a segment and create the object name in directory form */
/*-----------------------------------------------------------------------*/
static
FRESULT create_name (
DIR* dp, /* Pointer to the directory object */
const TCHAR** path /* Pointer to pointer to the segment in the path string */
)
{
#if _USE_LFN /* LFN configuration */
BYTE b, cf;
WCHAR w, *lfn;
UINT i, ni, si, di;
const TCHAR *p;
/* Create LFN in Unicode */
for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
lfn = dp->lfn;
si = di = 0;
for (;;) {
w = p[si++]; /* Get a character */
if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */
if (di >= _MAX_LFN) /* Reject too long name */
return FR_INVALID_NAME;
#if !_LFN_UNICODE
w &= 0xFF;
if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
b = (BYTE)p[si++]; /* Get 2nd byte */
if (!IsDBCS2(b))
return FR_INVALID_NAME; /* Reject invalid sequence */
w = (w << 8) + b; /* Create a DBC */
}
w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */
if (!w) return FR_INVALID_NAME; /* Reject invalid code */
#endif
if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal characters for LFN */
return FR_INVALID_NAME;
lfn[di++] = w; /* Store the Unicode character */
}
*path = &p[si]; /* Return pointer to the next segment */
cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
#if _FS_RPATH
if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */
(di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) {
lfn[di] = 0;
for (i = 0; i < 11; i++)
dp->fn[i] = (i < di) ? '.' : ' ';
dp->fn[i] = cf | NS_DOT; /* This is a dot entry */
return FR_OK;
}
#endif
while (di) { /* Strip trailing spaces and dots */
w = lfn[di-1];
if (w != ' ' && w != '.') break;
di--;
}
if (!di) return FR_INVALID_NAME; /* Reject nul string */
lfn[di] = 0; /* LFN is created */
/* Create SFN in directory form */
mem_set(dp->fn, ' ', 11);
for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
if (si) cf |= NS_LOSS | NS_LFN;
while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
b = i = 0; ni = 8;
for (;;) {
w = lfn[si++]; /* Get an LFN character */
if (!w) break; /* Break on end of the LFN */
if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
cf |= NS_LOSS | NS_LFN; continue;
}
if (i >= ni || si == di) { /* Extension or end of SFN */
if (ni == 11) { /* Long extension */
cf |= NS_LOSS | NS_LFN; break;
}
if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
if (si > di) break; /* No extension */
si = di; i = 8; ni = 11; /* Enter extension section */
b <<= 2; continue;
}
if (w >= 0x80) { /* Non ASCII character */
#ifdef _EXCVT
w = ff_convert(w, 0); /* Unicode -> OEM code */
if (w) w = ExCvt[w - 0x80]; /* Convert extended character to upper (SBCS) */
#else
w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
#endif
cf |= NS_LFN; /* Force create LFN entry */
}
if (_DF1S && w >= 0x100) { /* Double byte character (always false on SBCS cfg) */
if (i >= ni - 1) {
cf |= NS_LOSS | NS_LFN; i = ni; continue;
}
dp->fn[i++] = (BYTE)(w >> 8);
} else { /* Single byte character */
if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */
w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
} else {
if (IsUpper(w)) { /* ASCII large capital */
b |= 2;
} else {
if (IsLower(w)) { /* ASCII small capital */
b |= 1; w -= 0x20;
}
}
}
}
dp->fn[i++] = (BYTE)w;
}
if (dp->fn[0] == DDE) dp->fn[0] = NDDE; /* If the first character collides with deleted mark, replace it with 0x05 */
if (ni == 8) b <<= 2;
if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
cf |= NS_LFN;
if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */
if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
}
dp->fn[NSFLAG] = cf; /* SFN is created */
return FR_OK;
#else /* Non-LFN configuration */
BYTE b, c, d, *sfn;
UINT ni, si, i;
const char *p;
/* Create file name in directory form */
for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
sfn = dp->fn;
mem_set(sfn, ' ', 11);
si = i = b = 0; ni = 8;
#if _FS_RPATH
if (p[si] == '.') { /* Is this a dot entry? */
for (;;) {
c = (BYTE)p[si++];
if (c != '.' || si >= 3) break;
sfn[i++] = c;
}
if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
*path = &p[si]; /* Return pointer to the next segment */
sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */
return FR_OK;
}
#endif
for (;;) {
c = (BYTE)p[si++];
if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */
if (c == '.' || i >= ni) {
if (ni != 8 || c != '.') return FR_INVALID_NAME;
i = 8; ni = 11;
b <<= 2; continue;
}
if (c >= 0x80) { /* Extended character? */
b |= 3; /* Eliminate NT flag */
#ifdef _EXCVT
c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */
#else
#if !_DF1S
return FR_INVALID_NAME; /* Reject extended characters (ASCII cfg) */
#endif
#endif
}
if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
d = (BYTE)p[si++]; /* Get 2nd byte */
if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
return FR_INVALID_NAME;
sfn[i++] = c;
sfn[i++] = d;
} else { /* Single byte code */
if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */
return FR_INVALID_NAME;
if (IsUpper(c)) { /* ASCII large capital? */
b |= 2;
} else {
if (IsLower(c)) { /* ASCII small capital? */
b |= 1; c -= 0x20;
}
}
sfn[i++] = c;
}
}
*path = &p[si]; /* Return pointer to the next segment */
c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
if (!i) return FR_INVALID_NAME; /* Reject nul string */
if (sfn[0] == DDE) sfn[0] = NDDE; /* When first character collides with DDE, replace it with 0x05 */
if (ni == 8) b <<= 2;
if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */
if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */
sfn[NSFLAG] = c; /* Store NT flag, File name is created */
return FR_OK;
#endif
}
/*-----------------------------------------------------------------------*/
/* Follow a file path */
/*-----------------------------------------------------------------------*/
static
FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
DIR* dp, /* Directory object to return last directory and found object */
const TCHAR* path /* Full-path string to find a file or directory */
)
{
FRESULT res;
BYTE *dir, ns;
#if _FS_RPATH
if (*path == '/' || *path == '\\') { /* There is a heading separator */
path++; dp->sclust = 0; /* Strip it and start from the root directory */
} else { /* No heading separator */
dp->sclust = dp->fs->cdir; /* Start from the current directory */
}
#else
if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
path++;
dp->sclust = 0; /* Always start from the root directory */
#endif
if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */
res = dir_sdi(dp, 0);
dp->dir = 0;
} else { /* Follow path */
for (;;) {
res = create_name(dp, &path); /* Get a segment name of the path */
if (res != FR_OK) break;
res = dir_find(dp); /* Find an object with the sagment name */
ns = dp->fn[NSFLAG];
if (res != FR_OK) { /* Failed to find the object */
if (res == FR_NO_FILE) { /* Object is not found */
if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, */
dp->sclust = 0; dp->dir = 0; /* it is the root directory and stay there */
if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */
res = FR_OK; /* Ended at the root directroy. Function completed. */
} else { /* Could not find the object */
if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */
}
}
break;
}
if (ns & NS_LAST) break; /* Last segment matched. Function completed. */
dir = dp->dir; /* Follow the sub-directory */
if (!(dir[DIR_Attr] & AM_DIR)) { /* It is not a sub-directory and cannot follow */
res = FR_NO_PATH; break;
}
dp->sclust = ld_clust(dp->fs, dir);
}
}
return res;
}
/*-----------------------------------------------------------------------*/
/* Get logical drive number from path name */
/*-----------------------------------------------------------------------*/
static
int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */
const TCHAR** path /* Pointer to pointer to the path name */
)
{
const TCHAR *tp, *tt;
UINT i;
int vol = -1;
if (*path) { /* If the pointer is not a null */
for (tt = *path; (UINT)*tt >= (_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find ':' in the path */
if (*tt == ':') { /* If a ':' is exist in the path name */
tp = *path;
i = *tp++ - '0';
if (i < 10 && tp == tt) { /* Is there a numeric drive id? */
if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
vol = (int)i;
*path = ++tt;
}
} else { /* No numeric drive number */
#if _STR_VOLUME_ID /* Find string drive id */
static const char* const str[] = {_VOLUME_STRS};
const char *sp;
char c;
TCHAR tc;
i = 0; tt++;
do {
sp = str[i]; tp = *path;
do { /* Compare a string drive id with path name */
c = *sp++; tc = *tp++;
if (IsLower(tc)) tc -= 0x20;
} while (c && (TCHAR)c == tc);
} while ((c || tp != tt) && ++i < _VOLUMES); /* Repeat for each id until pattern match */
if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
vol = (int)i;
*path = tt;
}
#endif
}
return vol;
}
#if _FS_RPATH && _VOLUMES >= 2
vol = CurrVol; /* Current drive */
#else
vol = 0; /* Drive 0 */
#endif
}
return vol;
}
/*-----------------------------------------------------------------------*/
/* Load a sector and check if it is an FAT boot sector */
/*-----------------------------------------------------------------------*/
static
BYTE check_fs ( /* 0:FAT boor sector, 1:Valid boor sector but not FAT, 2:Not a boot sector, 3:Disk error */
FATFS* fs, /* File system object */
DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
)
{
fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */
if (move_window(fs, sect) != FR_OK) /* Load boot record */
return 3;
if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */
return 2;
if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
return 0;
if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
return 0;
return 1;
}
/*-----------------------------------------------------------------------*/
/* Find logical drive and check if the volume is mounted */
/*-----------------------------------------------------------------------*/
static
FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */
FATFS** rfs, /* Pointer to pointer to the found file system object */
const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
BYTE wmode /* !=0: Check write protection for write access */
)
{
BYTE fmt;
int vol;
DSTATUS stat;
DWORD bsect, fasize, tsect, sysect, nclst, szbfat;
WORD nrsv;
FATFS *fs;
/* Get logical drive number from the path name */
*rfs = 0;
vol = get_ldnumber(path);
if (vol < 0) return FR_INVALID_DRIVE;
/* Check if the file system object is valid or not */
fs = FatFs[vol]; /* Get pointer to the file system object */
if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
ENTER_FF(fs); /* Lock the volume */
*rfs = fs; /* Return pointer to the file system object */
if (fs->fs_type) { /* If the volume has been mounted */
stat = disk_status(fs->drv);
if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */
if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */
return FR_WRITE_PROTECTED;
return FR_OK; /* The file system object is valid */
}
}
/* The file system object is not valid. */
/* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
fs->fs_type = 0; /* Clear the file system object */
fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */
stat = disk_initialize(fs->drv); /* Initialize the physical drive */
if (stat & STA_NOINIT) /* Check if the initialization succeeded */
return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */
return FR_WRITE_PROTECTED;
#if _MAX_SS != _MIN_SS /* Get sector size (multiple sector size cfg only) */
if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
|| SS(fs) < _MIN_SS || SS(fs) > _MAX_SS) return FR_DISK_ERR;
#endif
/* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */
bsect = 0;
fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT boot sector as SFD */
if (fmt == 1 || (!fmt && (LD2PT(vol)))) { /* Not an FAT boot sector or forced partition number */
UINT i;
DWORD br[4];
for (i = 0; i < 4; i++) { /* Get partition offset */
BYTE *pt = fs->win+MBR_Table + i * SZ_PTE;
br[i] = pt[4] ? LD_DWORD(&pt[8]) : 0;
}
i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */
if (i) i--;
do { /* Find an FAT volume */
bsect = br[i];
fmt = bsect ? check_fs(fs, bsect) : 2; /* Check the partition */
} while (!LD2PT(vol) && fmt && ++i < 4);
}
if (fmt == 3) return FR_DISK_ERR; /* An error occured in the disk I/O layer */
if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */
/* An FAT volume is found. Following code initializes the file system object */
if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */
return FR_NO_FILESYSTEM;
fasize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */
if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32);
fs->fsize = fasize;
fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */
if (fs->n_fats != 1 && fs->n_fats != 2) /* (Must be 1 or 2) */
return FR_NO_FILESYSTEM;
fasize *= fs->n_fats; /* Number of sectors for FAT area */
fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
if (!fs->csize || (fs->csize & (fs->csize - 1))) /* (Must be power of 2) */
return FR_NO_FILESYSTEM;
fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Number of root directory entries */
if (fs->n_rootdir % (SS(fs) / SZ_DIR)) /* (Must be sector aligned) */
return FR_NO_FILESYSTEM;
tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */
if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); /* Number of reserved sectors */
if (!nrsv) return FR_NO_FILESYSTEM; /* (Must not be 0) */
/* Determine the FAT sub type */
sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); /* RSV+FAT+DIR */
if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
fmt = FS_FAT12;
if (nclst >= MIN_FAT16) fmt = FS_FAT16;
if (nclst >= MIN_FAT32) fmt = FS_FAT32;
/* Boundaries and Limits */
fs->n_fatent = nclst + 2; /* Number of FAT entries */
fs->volbase = bsect; /* Volume start sector */
fs->fatbase = bsect + nrsv; /* FAT start sector */
fs->database = bsect + sysect; /* Data start sector */
if (fmt == FS_FAT32) {
if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */
szbfat = fs->n_fatent * 4; /* (Needed FAT size) */
} else {
if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */
fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
}
if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than the size needed) */
return FR_NO_FILESYSTEM;
#if !_FS_READONLY
/* Initialize cluster allocation information */
fs->last_clust = fs->free_clust = 0xFFFFFFFF;
/* Get fsinfo if available */
fs->fsi_flag = 0x80;
#if (_FS_NOFSINFO & 3) != 3
if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo is 1 */
&& LD_WORD(fs->win+BPB_FSInfo) == 1
&& move_window(fs, bsect + 1) == FR_OK)
{
fs->fsi_flag = 0;
if (LD_WORD(fs->win+BS_55AA) == 0xAA55 /* Load FSINFO data if available */
&& LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252
&& LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272)
{
#if (_FS_NOFSINFO & 1) == 0
fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
#endif
#if (_FS_NOFSINFO & 2) == 0
fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
#endif
}
}
#endif
#endif
fs->fs_type = fmt; /* FAT sub-type */
fs->id = ++Fsid; /* File system mount ID */
#if _FS_RPATH
fs->cdir = 0; /* Set current directory to root */
#endif
#if _FS_LOCK /* Clear file lock semaphores */
clear_lock(fs);
#endif
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Check if the file/directory object is valid or not */
/*-----------------------------------------------------------------------*/
static
FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
void* obj /* Pointer to the object FIL/DIR to check validity */
)
{
FIL *fil = (FIL*)obj; /* Assuming offset of .fs and .id in the FIL/DIR structure is identical */
if (!fil || !fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id)
return FR_INVALID_OBJECT;
ENTER_FF(fil->fs); /* Lock file system */
if (disk_status(fil->fs->drv) & STA_NOINIT)
return FR_NOT_READY;
return FR_OK;
}
/*--------------------------------------------------------------------------
Public Functions
--------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------*/
/* Mount/Unmount a Logical Drive */
/*-----------------------------------------------------------------------*/
FRESULT f_mount (
FATFS* fs, /* Pointer to the file system object (NULL:unmount)*/
const TCHAR* path, /* Logical drive number to be mounted/unmounted */
BYTE opt /* 0:Do not mount (delayed mount), 1:Mount immediately */
)
{
FATFS *cfs;
int vol;
FRESULT res;
const TCHAR *rp = path;
vol = get_ldnumber(&rp);
if (vol < 0) return FR_INVALID_DRIVE;
cfs = FatFs[vol]; /* Pointer to fs object */
if (cfs) {
#if _FS_LOCK
clear_lock(cfs);
#endif
#if _FS_REENTRANT /* Discard sync object of the current volume */
if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
#endif
cfs->fs_type = 0; /* Clear old fs object */
}
if (fs) {
fs->fs_type = 0; /* Clear new fs object */
#if _FS_REENTRANT /* Create sync object for the new volume */
if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
#endif
}
FatFs[vol] = fs; /* Register new fs object */
if (!fs || opt != 1) return FR_OK; /* Do not mount now, it will be mounted later */
res = find_volume(&fs, &path, 0); /* Force mounted the volume */
LEAVE_FF(fs, res);
}
/*-----------------------------------------------------------------------*/
/* Open or Create a File */
/*-----------------------------------------------------------------------*/
FRESULT f_open (
FIL* fp, /* Pointer to the blank file object */
const TCHAR* path, /* Pointer to the file name */
BYTE mode /* Access mode and file open mode flags */
)
{
FRESULT res;
DIR dj;
BYTE *dir;
DEF_NAMEBUF;
if (!fp) return FR_INVALID_OBJECT;
fp->fs = 0; /* Clear file object */
/* Get logical drive number */
#if !_FS_READONLY
mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
res = find_volume(&dj.fs, &path, (BYTE)(mode & ~FA_READ));
#else
mode &= FA_READ;
res = find_volume(&dj.fs, &path, 0);
#endif
if (res == FR_OK) {
INIT_BUF(dj);
res = follow_path(&dj, path); /* Follow the file path */
dir = dj.dir;
#if !_FS_READONLY /* R/W configuration */
if (res == FR_OK) {
if (!dir) /* Default directory itself */
res = FR_INVALID_NAME;
#if _FS_LOCK
else
res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
#endif
}
/* Create or Open a file */
if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
DWORD dw, cl;
if (res != FR_OK) { /* No file, create new */
if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
#if _FS_LOCK
res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
#else
res = dir_register(&dj);
#endif
mode |= FA_CREATE_ALWAYS; /* File is created */
dir = dj.dir; /* New entry */
}
else { /* Any object is already existing */
if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */
res = FR_DENIED;
} else {
if (mode & FA_CREATE_NEW) /* Cannot create as new file */
res = FR_EXIST;
}
}
if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */
dw = GET_FATTIME(); /* Created time */
ST_DWORD(dir+DIR_CrtTime, dw);
dir[DIR_Attr] = 0; /* Reset attribute */
ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */
cl = ld_clust(dj.fs, dir); /* Get start cluster */
st_clust(dir, 0); /* cluster = 0 */
dj.fs->wflag = 1;
if (cl) { /* Remove the cluster chain if exist */
dw = dj.fs->winsect;
res = remove_chain(dj.fs, cl);
if (res == FR_OK) {
dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
res = move_window(dj.fs, dw);
}
}
}
}
else { /* Open an existing file */
if (res == FR_OK) { /* Follow succeeded */
if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */
res = FR_NO_FILE;
} else {
if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
res = FR_DENIED;
}
}
}
if (res == FR_OK) {
if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */
mode |= FA__WRITTEN;
fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
fp->dir_ptr = dir;
#if _FS_LOCK
fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
if (!fp->lockid) res = FR_INT_ERR;
#endif
}
#else /* R/O configuration */
if (res == FR_OK) { /* Follow succeeded */
dir = dj.dir;
if (!dir) { /* Current directory itself */
res = FR_INVALID_NAME;
} else {
if (dir[DIR_Attr] & AM_DIR) /* It is a directory */
res = FR_NO_FILE;
}
}
#endif
FREE_BUF();
if (res == FR_OK) {
fp->flag = mode; /* File access mode */
fp->err = 0; /* Clear error flag */
fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */
fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
fp->fptr = 0; /* File pointer */
fp->dsect = 0;
#if _USE_FASTSEEK
fp->cltbl = 0; /* Normal seek mode */
#endif
fp->fs = dj.fs; /* Validate file object */
fp->id = fp->fs->id;
}
}
LEAVE_FF(dj.fs, res);
}
/*-----------------------------------------------------------------------*/
/* Read File */
/*-----------------------------------------------------------------------*/
FRESULT f_read (
FIL* fp, /* Pointer to the file object */
void* buff, /* Pointer to data buffer */
UINT btr, /* Number of bytes to read */
UINT* br /* Pointer to number of bytes read */
)
{
FRESULT res;
DWORD clst, sect, remain;
UINT rcnt, cc;
BYTE csect, *rbuff = (BYTE*)buff;
*br = 0; /* Clear read byte counter */
res = validate(fp); /* Check validity */
if (res != FR_OK) LEAVE_FF(fp->fs, res);
if (fp->err) /* Check error */
LEAVE_FF(fp->fs, (FRESULT)fp->err);
if (!(fp->flag & FA_READ)) /* Check access mode */
LEAVE_FF(fp->fs, FR_DENIED);
remain = fp->fsize - fp->fptr;
if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
for ( ; btr; /* Repeat until all data read */
rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
if (!csect) { /* On the cluster boundary? */
if (fp->fptr == 0) { /* On the top of the file? */
clst = fp->sclust; /* Follow from the origin */
} else { /* Middle or end of the file */
#if _USE_FASTSEEK
if (fp->cltbl)
clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
else
#endif
clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */
}
if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
fp->clust = clst; /* Update current cluster */
}
sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
if (!sect) ABORT(fp->fs, FR_INT_ERR);
sect += csect;
cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
if (cc) { /* Read maximum contiguous sectors directly */
if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
cc = fp->fs->csize - csect;
if (disk_read(fp->fs->drv, rbuff, sect, cc) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
#if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
#if _FS_TINY
if (fp->fs->wflag && fp->fs->winsect - sect < cc)
mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
#else
if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
#endif
#endif
rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
continue;
}
#if !_FS_TINY
if (fp->dsect != sect) { /* Load data sector if not in cache */
#if !_FS_READONLY
if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
fp->flag &= ~FA__DIRTY;
}
#endif
if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */
ABORT(fp->fs, FR_DISK_ERR);
}
#endif
fp->dsect = sect;
}
rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
if (rcnt > btr) rcnt = btr;
#if _FS_TINY
if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */
ABORT(fp->fs, FR_DISK_ERR);
mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
#else
mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
#endif
}
LEAVE_FF(fp->fs, FR_OK);
}
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Write File */
/*-----------------------------------------------------------------------*/
FRESULT f_write (
FIL* fp, /* Pointer to the file object */
const void *buff, /* Pointer to the data to be written */
UINT btw, /* Number of bytes to write */
UINT* bw /* Pointer to number of bytes written */
)
{
FRESULT res;
DWORD clst, sect;
UINT wcnt, cc;
const BYTE *wbuff = (const BYTE*)buff;
BYTE csect;
*bw = 0; /* Clear write byte counter */
res = validate(fp); /* Check validity */
if (res != FR_OK) LEAVE_FF(fp->fs, res);
if (fp->err) /* Check error */
LEAVE_FF(fp->fs, (FRESULT)fp->err);
if (!(fp->flag & FA_WRITE)) /* Check access mode */
LEAVE_FF(fp->fs, FR_DENIED);
if (fp->fptr + btw < fp->fptr) btw = 0; /* File size cannot reach 4GB */
for ( ; btw; /* Repeat until all data written */
wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
if (!csect) { /* On the cluster boundary? */
if (fp->fptr == 0) { /* On the top of the file? */
clst = fp->sclust; /* Follow from the origin */
if (clst == 0) /* When no cluster is allocated, */
clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
} else { /* Middle or end of the file */
#if _USE_FASTSEEK
if (fp->cltbl)
clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
else
#endif
clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */
}
if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
fp->clust = clst; /* Update current cluster */
if (fp->sclust == 0) fp->sclust = clst; /* Set start cluster if the first write */
}
#if _FS_TINY
if (fp->fs->winsect == fp->dsect && sync_window(fp->fs)) /* Write-back sector cache */
ABORT(fp->fs, FR_DISK_ERR);
#else
if (fp->flag & FA__DIRTY) { /* Write-back sector cache */
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
fp->flag &= ~FA__DIRTY;
}
#endif
sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
if (!sect) ABORT(fp->fs, FR_INT_ERR);
sect += csect;
cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
if (cc) { /* Write maximum contiguous sectors directly */
if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
cc = fp->fs->csize - csect;
if (disk_write(fp->fs->drv, wbuff, sect, cc) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
#if _FS_MINIMIZE <= 2
#if _FS_TINY
if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
fp->fs->wflag = 0;
}
#else
if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
fp->flag &= ~FA__DIRTY;
}
#endif
#endif
wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
continue;
}
#if _FS_TINY
if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */
if (sync_window(fp->fs)) ABORT(fp->fs, FR_DISK_ERR);
fp->fs->winsect = sect;
}
#else
if (fp->dsect != sect) { /* Fill sector cache with file data */
if (fp->fptr < fp->fsize &&
disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
}
#endif
fp->dsect = sect;
}
wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
if (wcnt > btw) wcnt = btw;
#if _FS_TINY
if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */
ABORT(fp->fs, FR_DISK_ERR);
mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
fp->fs->wflag = 1;
#else
mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
fp->flag |= FA__DIRTY;
#endif
}
if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
fp->flag |= FA__WRITTEN; /* Set file change flag */
LEAVE_FF(fp->fs, FR_OK);
}
/*-----------------------------------------------------------------------*/
/* Synchronize the File */
/*-----------------------------------------------------------------------*/
FRESULT f_sync (
FIL* fp /* Pointer to the file object */
)
{
FRESULT res;
DWORD tm;
BYTE *dir;
res = validate(fp); /* Check validity of the object */
if (res == FR_OK) {
if (fp->flag & FA__WRITTEN) { /* Has the file been written? */
/* Write-back dirty buffer */
#if !_FS_TINY
if (fp->flag & FA__DIRTY) {
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
LEAVE_FF(fp->fs, FR_DISK_ERR);
fp->flag &= ~FA__DIRTY;
}
#endif
/* Update the directory entry */
res = move_window(fp->fs, fp->dir_sect);
if (res == FR_OK) {
dir = fp->dir_ptr;
dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */
st_clust(dir, fp->sclust); /* Update start cluster */
tm = GET_FATTIME(); /* Update updated time */
ST_DWORD(dir+DIR_WrtTime, tm);
ST_WORD(dir+DIR_LstAccDate, 0);
fp->flag &= ~FA__WRITTEN;
fp->fs->wflag = 1;
res = sync_fs(fp->fs);
}
}
}
LEAVE_FF(fp->fs, res);
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* Close File */
/*-----------------------------------------------------------------------*/
FRESULT f_close (
FIL *fp /* Pointer to the file object to be closed */
)
{
FRESULT res;
#if !_FS_READONLY
res = f_sync(fp); /* Flush cached data */
if (res == FR_OK)
#endif
{
res = validate(fp); /* Lock volume */
if (res == FR_OK) {
#if _FS_REENTRANT
FATFS *fs = fp->fs;
#endif
#if _FS_LOCK
res = dec_lock(fp->lockid); /* Decrement file open counter */
if (res == FR_OK)
#endif
fp->fs = 0; /* Invalidate file object */
#if _FS_REENTRANT
unlock_fs(fs, FR_OK); /* Unlock volume */
#endif
}
}
return res;
}
/*-----------------------------------------------------------------------*/
/* Change Current Directory or Current Drive, Get Current Directory */
/*-----------------------------------------------------------------------*/
#if _FS_RPATH >= 1
#if _VOLUMES >= 2
FRESULT f_chdrive (
const TCHAR* path /* Drive number */
)
{
int vol;
vol = get_ldnumber(&path);
if (vol < 0) return FR_INVALID_DRIVE;
CurrVol = (BYTE)vol;
return FR_OK;
}
#endif
FRESULT f_chdir (
const TCHAR* path /* Pointer to the directory path */
)
{
FRESULT res;
DIR dj;
DEF_NAMEBUF;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 0);
if (res == FR_OK) {
INIT_BUF(dj);
res = follow_path(&dj, path); /* Follow the path */
FREE_BUF();
if (res == FR_OK) { /* Follow completed */
if (!dj.dir) {
dj.fs->cdir = dj.sclust; /* Start directory itself */
} else {
if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */
dj.fs->cdir = ld_clust(dj.fs, dj.dir);
else
res = FR_NO_PATH; /* Reached but a file */
}
}
if (res == FR_NO_FILE) res = FR_NO_PATH;
}
LEAVE_FF(dj.fs, res);
}
#if _FS_RPATH >= 2
FRESULT f_getcwd (
TCHAR* buff, /* Pointer to the directory path */
UINT len /* Size of path */
)
{
FRESULT res;
DIR dj;
UINT i, n;
DWORD ccl;
TCHAR *tp;
FILINFO fno;
DEF_NAMEBUF;
*buff = 0;
/* Get logical drive number */
res = find_volume(&dj.fs, (const TCHAR**)&buff, 0); /* Get current volume */
if (res == FR_OK) {
INIT_BUF(dj);
i = len; /* Bottom of buffer (directory stack base) */
dj.sclust = dj.fs->cdir; /* Start to follow upper directory from current directory */
while ((ccl = dj.sclust) != 0) { /* Repeat while current directory is a sub-directory */
res = dir_sdi(&dj, 1); /* Get parent directory */
if (res != FR_OK) break;
res = dir_read(&dj, 0);
if (res != FR_OK) break;
dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent directory */
res = dir_sdi(&dj, 0);
if (res != FR_OK) break;
do { /* Find the entry links to the child directory */
res = dir_read(&dj, 0);
if (res != FR_OK) break;
if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */
res = dir_next(&dj, 0);
} while (res == FR_OK);
if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
if (res != FR_OK) break;
#if _USE_LFN
fno.lfname = buff;
fno.lfsize = i;
#endif
get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */
tp = fno.fname;
#if _USE_LFN
if (*buff) tp = buff;
#endif
for (n = 0; tp[n]; n++) ;
if (i < n + 3) {
res = FR_NOT_ENOUGH_CORE; break;
}
while (n) buff[--i] = tp[--n];
buff[--i] = '/';
}
tp = buff;
if (res == FR_OK) {
#if _VOLUMES >= 2
*tp++ = '0' + CurrVol; /* Put drive number */
*tp++ = ':';
#endif
if (i == len) { /* Root-directory */
*tp++ = '/';
} else { /* Sub-directroy */
do /* Add stacked path str */
*tp++ = buff[i++];
while (i < len);
}
}
*tp = 0;
FREE_BUF();
}
LEAVE_FF(dj.fs, res);
}
#endif /* _FS_RPATH >= 2 */
#endif /* _FS_RPATH >= 1 */
#if _FS_MINIMIZE <= 2
/*-----------------------------------------------------------------------*/
/* Seek File R/W Pointer */
/*-----------------------------------------------------------------------*/
FRESULT f_lseek (
FIL* fp, /* Pointer to the file object */
DWORD ofs /* File pointer from top of file */
)
{
FRESULT res;
res = validate(fp); /* Check validity of the object */
if (res != FR_OK) LEAVE_FF(fp->fs, res);
if (fp->err) /* Check error */
LEAVE_FF(fp->fs, (FRESULT)fp->err);
#if _USE_FASTSEEK
if (fp->cltbl) { /* Fast seek */
DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
if (ofs == CREATE_LINKMAP) { /* Create CLMT */
tbl = fp->cltbl;
tlen = *tbl++; ulen = 2; /* Given table size and required table size */
cl = fp->sclust; /* Top of the chain */
if (cl) {
do {
/* Get a fragment */
tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
do {
pcl = cl; ncl++;
cl = get_fat(fp->fs, cl);
if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
} while (cl == pcl + 1);
if (ulen <= tlen) { /* Store the length and top of the fragment */
*tbl++ = ncl; *tbl++ = tcl;
}
} while (cl < fp->fs->n_fatent); /* Repeat until end of chain */
}
*fp->cltbl = ulen; /* Number of items used */
if (ulen <= tlen)
*tbl = 0; /* Terminate table */
else
res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
} else { /* Fast seek */
if (ofs > fp->fsize) /* Clip offset at the file size */
ofs = fp->fsize;
fp->fptr = ofs; /* Set file pointer */
if (ofs) {
fp->clust = clmt_clust(fp, ofs - 1);
dsc = clust2sect(fp->fs, fp->clust);
if (!dsc) ABORT(fp->fs, FR_INT_ERR);
dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */
#if !_FS_TINY
#if !_FS_READONLY
if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
fp->flag &= ~FA__DIRTY;
}
#endif
if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */
ABORT(fp->fs, FR_DISK_ERR);
#endif
fp->dsect = dsc;
}
}
}
} else
#endif
/* Normal Seek */
{
DWORD clst, bcs, nsect, ifptr;
if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
#if !_FS_READONLY
&& !(fp->flag & FA_WRITE)
#endif
) ofs = fp->fsize;
ifptr = fp->fptr;
fp->fptr = nsect = 0;
if (ofs) {
bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
if (ifptr > 0 &&
(ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
ofs -= fp->fptr;
clst = fp->clust;
} else { /* When seek to back cluster, */
clst = fp->sclust; /* start from the first cluster */
#if !_FS_READONLY
if (clst == 0) { /* If no cluster chain, create a new chain */
clst = create_chain(fp->fs, 0);
if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
fp->sclust = clst;
}
#endif
fp->clust = clst;
}
if (clst != 0) {
while (ofs > bcs) { /* Cluster following loop */
#if !_FS_READONLY
if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */
if (clst == 0) { /* When disk gets full, clip file size */
ofs = bcs; break;
}
} else
#endif
clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
fp->clust = clst;
fp->fptr += bcs;
ofs -= bcs;
}
fp->fptr += ofs;
if (ofs % SS(fp->fs)) {
nsect = clust2sect(fp->fs, clst); /* Current sector */
if (!nsect) ABORT(fp->fs, FR_INT_ERR);
nsect += ofs / SS(fp->fs);
}
}
}
if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */
#if !_FS_TINY
#if !_FS_READONLY
if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
ABORT(fp->fs, FR_DISK_ERR);
fp->flag &= ~FA__DIRTY;
}
#endif
if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */
ABORT(fp->fs, FR_DISK_ERR);
#endif
fp->dsect = nsect;
}
#if !_FS_READONLY
if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */
fp->fsize = fp->fptr;
fp->flag |= FA__WRITTEN;
}
#endif
}
LEAVE_FF(fp->fs, res);
}
#if _FS_MINIMIZE <= 1
/*-----------------------------------------------------------------------*/
/* Create a Directory Object */
/*-----------------------------------------------------------------------*/
FRESULT f_opendir (
DIR* dp, /* Pointer to directory object to create */
const TCHAR* path /* Pointer to the directory path */
)
{
FRESULT res;
FATFS* fs;
DEF_NAMEBUF;
if (!dp) return FR_INVALID_OBJECT;
/* Get logical drive number */
res = find_volume(&fs, &path, 0);
if (res == FR_OK) {
dp->fs = fs;
INIT_BUF(*dp);
res = follow_path(dp, path); /* Follow the path to the directory */
FREE_BUF();
if (res == FR_OK) { /* Follow completed */
if (dp->dir) { /* It is not the origin directory itself */
if (dp->dir[DIR_Attr] & AM_DIR) /* The object is a sub directory */
dp->sclust = ld_clust(fs, dp->dir);
else /* The object is a file */
res = FR_NO_PATH;
}
if (res == FR_OK) {
dp->id = fs->id;
res = dir_sdi(dp, 0); /* Rewind directory */
#if _FS_LOCK
if (res == FR_OK) {
if (dp->sclust) {
dp->lockid = inc_lock(dp, 0); /* Lock the sub directory */
if (!dp->lockid)
res = FR_TOO_MANY_OPEN_FILES;
} else {
dp->lockid = 0; /* Root directory need not to be locked */
}
}
#endif
}
}
if (res == FR_NO_FILE) res = FR_NO_PATH;
}
if (res != FR_OK) dp->fs = 0; /* Invalidate the directory object if function faild */
LEAVE_FF(fs, res);
}
/*-----------------------------------------------------------------------*/
/* Close Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_closedir (
DIR *dp /* Pointer to the directory object to be closed */
)
{
FRESULT res;
res = validate(dp);
if (res == FR_OK) {
#if _FS_REENTRANT
FATFS *fs = dp->fs;
#endif
#if _FS_LOCK
if (dp->lockid) /* Decrement sub-directory open counter */
res = dec_lock(dp->lockid);
if (res == FR_OK)
#endif
dp->fs = 0; /* Invalidate directory object */
#if _FS_REENTRANT
unlock_fs(fs, FR_OK); /* Unlock volume */
#endif
}
return res;
}
/*-----------------------------------------------------------------------*/
/* Read Directory Entries in Sequence */
/*-----------------------------------------------------------------------*/
FRESULT f_readdir (
DIR* dp, /* Pointer to the open directory object */
FILINFO* fno /* Pointer to file information to return */
)
{
FRESULT res;
DEF_NAMEBUF;
res = validate(dp); /* Check validity of the object */
if (res == FR_OK) {
if (!fno) {
res = dir_sdi(dp, 0); /* Rewind the directory object */
} else {
INIT_BUF(*dp);
res = dir_read(dp, 0); /* Read an item */
if (res == FR_NO_FILE) { /* Reached end of directory */
dp->sect = 0;
res = FR_OK;
}
if (res == FR_OK) { /* A valid entry is found */
get_fileinfo(dp, fno); /* Get the object information */
res = dir_next(dp, 0); /* Increment index for next */
if (res == FR_NO_FILE) {
dp->sect = 0;
res = FR_OK;
}
}
FREE_BUF();
}
}
LEAVE_FF(dp->fs, res);
}
#if _FS_MINIMIZE == 0
/*-----------------------------------------------------------------------*/
/* Get File Status */
/*-----------------------------------------------------------------------*/
FRESULT f_stat (
const TCHAR* path, /* Pointer to the file path */
FILINFO* fno /* Pointer to file information to return */
)
{
FRESULT res;
DIR dj;
DEF_NAMEBUF;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 0);
if (res == FR_OK) {
INIT_BUF(dj);
res = follow_path(&dj, path); /* Follow the file path */
if (res == FR_OK) { /* Follow completed */
if (dj.dir) { /* Found an object */
if (fno) get_fileinfo(&dj, fno);
} else { /* It is root directory */
res = FR_INVALID_NAME;
}
}
FREE_BUF();
}
LEAVE_FF(dj.fs, res);
}
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Get Number of Free Clusters */
/*-----------------------------------------------------------------------*/
FRESULT f_getfree (
const TCHAR* path, /* Path name of the logical drive number */
DWORD* nclst, /* Pointer to a variable to return number of free clusters */
FATFS** fatfs /* Pointer to return pointer to corresponding file system object */
)
{
FRESULT res;
FATFS *fs;
DWORD n, clst, sect, stat;
UINT i;
BYTE fat, *p;
/* Get logical drive number */
res = find_volume(fatfs, &path, 0);
fs = *fatfs;
if (res == FR_OK) {
/* If free_clust is valid, return it without full cluster scan */
if (fs->free_clust <= fs->n_fatent - 2) {
*nclst = fs->free_clust;
} else {
/* Get number of free clusters */
fat = fs->fs_type;
n = 0;
if (fat == FS_FAT12) {
clst = 2;
do {
stat = get_fat(fs, clst);
if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
if (stat == 1) { res = FR_INT_ERR; break; }
if (stat == 0) n++;
} while (++clst < fs->n_fatent);
} else {
clst = fs->n_fatent;
sect = fs->fatbase;
i = 0; p = 0;
do {
if (!i) {
res = move_window(fs, sect++);
if (res != FR_OK) break;
p = fs->win;
i = SS(fs);
}
if (fat == FS_FAT16) {
if (LD_WORD(p) == 0) n++;
p += 2; i -= 2;
} else {
if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
p += 4; i -= 4;
}
} while (--clst);
}
fs->free_clust = n;
fs->fsi_flag |= 1;
*nclst = n;
}
}
LEAVE_FF(fs, res);
}
/*-----------------------------------------------------------------------*/
/* Truncate File */
/*-----------------------------------------------------------------------*/
FRESULT f_truncate (
FIL* fp /* Pointer to the file object */
)
{
FRESULT res;
DWORD ncl;
res = validate(fp); /* Check validity of the object */
if (res == FR_OK) {
if (fp->err) { /* Check error */
res = (FRESULT)fp->err;
} else {
if (!(fp->flag & FA_WRITE)) /* Check access mode */
res = FR_DENIED;
}
}
if (res == FR_OK) {
if (fp->fsize > fp->fptr) {
fp->fsize = fp->fptr; /* Set file size to current R/W point */
fp->flag |= FA__WRITTEN;
if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
res = remove_chain(fp->fs, fp->sclust);
fp->sclust = 0;
} else { /* When truncate a part of the file, remove remaining clusters */
ncl = get_fat(fp->fs, fp->clust);
res = FR_OK;
if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
if (ncl == 1) res = FR_INT_ERR;
if (res == FR_OK && ncl < fp->fs->n_fatent) {
res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF);
if (res == FR_OK) res = remove_chain(fp->fs, ncl);
}
}
#if !_FS_TINY
if (res == FR_OK && (fp->flag & FA__DIRTY)) {
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
res = FR_DISK_ERR;
else
fp->flag &= ~FA__DIRTY;
}
#endif
}
if (res != FR_OK) fp->err = (FRESULT)res;
}
LEAVE_FF(fp->fs, res);
}
/*-----------------------------------------------------------------------*/
/* Delete a File or Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_unlink (
const TCHAR* path /* Pointer to the file or directory path */
)
{
FRESULT res;
DIR dj, sdj;
BYTE *dir;
DWORD dclst = 0;
DEF_NAMEBUF;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 1);
if (res == FR_OK) {
INIT_BUF(dj);
res = follow_path(&dj, path); /* Follow the file path */
if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
res = FR_INVALID_NAME; /* Cannot remove dot entry */
#if _FS_LOCK
if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open object */
#endif
if (res == FR_OK) { /* The object is accessible */
dir = dj.dir;
if (!dir) {
res = FR_INVALID_NAME; /* Cannot remove the origin directory */
} else {
if (dir[DIR_Attr] & AM_RDO)
res = FR_DENIED; /* Cannot remove R/O object */
}
if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */
dclst = ld_clust(dj.fs, dir);
if (!dclst) {
res = FR_INT_ERR;
} else { /* Make sure the sub-directory is empty */
mem_cpy(&sdj, &dj, sizeof (DIR));
sdj.sclust = dclst;
res = dir_sdi(&sdj, 2); /* Exclude dot entries */
if (res == FR_OK) {
res = dir_read(&sdj, 0); /* Read an item */
if (res == FR_OK /* Not empty directory */
#if _FS_RPATH
|| dclst == dj.fs->cdir /* or current directory */
#endif
) res = FR_DENIED;
if (res == FR_NO_FILE) res = FR_OK; /* It is empty */
}
}
}
if (res == FR_OK) {
res = dir_remove(&dj); /* Remove the directory entry */
if (res == FR_OK && dclst) /* Remove the cluster chain if exist */
res = remove_chain(dj.fs, dclst);
if (res == FR_OK) res = sync_fs(dj.fs);
}
}
FREE_BUF();
}
LEAVE_FF(dj.fs, res);
}
/*-----------------------------------------------------------------------*/
/* Create a Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_mkdir (
const TCHAR* path /* Pointer to the directory path */
)
{
FRESULT res;
DIR dj;
BYTE *dir, n;
DWORD dsc, dcl, pcl, tm = GET_FATTIME();
DEF_NAMEBUF;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 1);
if (res == FR_OK) {
INIT_BUF(dj);
res = follow_path(&dj, path); /* Follow the file path */
if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */
if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT))
res = FR_INVALID_NAME;
if (res == FR_NO_FILE) { /* Can create a new directory */
dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */
res = FR_OK;
if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */
if (dcl == 1) res = FR_INT_ERR;
if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
if (res == FR_OK) /* Flush FAT */
res = sync_window(dj.fs);
if (res == FR_OK) { /* Initialize the new directory table */
dsc = clust2sect(dj.fs, dcl);
dir = dj.fs->win;
mem_set(dir, 0, SS(dj.fs));
mem_set(dir+DIR_Name, ' ', 11); /* Create "." entry */
dir[DIR_Name] = '.';
dir[DIR_Attr] = AM_DIR;
ST_DWORD(dir+DIR_WrtTime, tm);
st_clust(dir, dcl);
mem_cpy(dir+SZ_DIR, dir, SZ_DIR); /* Create ".." entry */
dir[SZ_DIR+1] = '.'; pcl = dj.sclust;
if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
pcl = 0;
st_clust(dir+SZ_DIR, pcl);
for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */
dj.fs->winsect = dsc++;
dj.fs->wflag = 1;
res = sync_window(dj.fs);
if (res != FR_OK) break;
mem_set(dir, 0, SS(dj.fs));
}
}
if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */
if (res != FR_OK) {
remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */
} else {
dir = dj.dir;
dir[DIR_Attr] = AM_DIR; /* Attribute */
ST_DWORD(dir+DIR_WrtTime, tm); /* Created time */
st_clust(dir, dcl); /* Table start cluster */
dj.fs->wflag = 1;
res = sync_fs(dj.fs);
}
}
FREE_BUF();
}
LEAVE_FF(dj.fs, res);
}
/*-----------------------------------------------------------------------*/
/* Change Attribute */
/*-----------------------------------------------------------------------*/
FRESULT f_chmod (
const TCHAR* path, /* Pointer to the file path */
BYTE value, /* Attribute bits */
BYTE mask /* Attribute mask to change */
)
{
FRESULT res;
DIR dj;
BYTE *dir;
DEF_NAMEBUF;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 1);
if (res == FR_OK) {
INIT_BUF(dj);
res = follow_path(&dj, path); /* Follow the file path */
FREE_BUF();
if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
res = FR_INVALID_NAME;
if (res == FR_OK) {
dir = dj.dir;
if (!dir) { /* Is it a root directory? */
res = FR_INVALID_NAME;
} else { /* File or sub directory */
mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
dj.fs->wflag = 1;
res = sync_fs(dj.fs);
}
}
}
LEAVE_FF(dj.fs, res);
}
/*-----------------------------------------------------------------------*/
/* Rename File/Directory */
/*-----------------------------------------------------------------------*/
FRESULT f_rename (
const TCHAR* path_old, /* Pointer to the object to be renamed */
const TCHAR* path_new /* Pointer to the new name */
)
{
FRESULT res;
DIR djo, djn;
BYTE buf[21], *dir;
DWORD dw;
DEF_NAMEBUF;
/* Get logical drive number of the source object */
res = find_volume(&djo.fs, &path_old, 1);
if (res == FR_OK) {
djn.fs = djo.fs;
INIT_BUF(djo);
res = follow_path(&djo, path_old); /* Check old object */
if (_FS_RPATH && res == FR_OK && (djo.fn[NSFLAG] & NS_DOT))
res = FR_INVALID_NAME;
#if _FS_LOCK
if (res == FR_OK) res = chk_lock(&djo, 2);
#endif
if (res == FR_OK) { /* Old object is found */
if (!djo.dir) { /* Is root dir? */
res = FR_NO_FILE;
} else {
mem_cpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except name */
mem_cpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */
if (get_ldnumber(&path_new) >= 0) /* Snip drive number off and ignore it */
res = follow_path(&djn, path_new); /* and make sure if new object name is not conflicting */
else
res = FR_INVALID_DRIVE;
if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
/* Start of critical section that any interruption can cause a cross-link */
res = dir_register(&djn); /* Register the new entry */
if (res == FR_OK) {
dir = djn.dir; /* Copy object information except name */
mem_cpy(dir+13, buf+2, 19);
dir[DIR_Attr] = buf[0] | AM_ARC;
djo.fs->wflag = 1;
if ((dir[DIR_Attr] & AM_DIR) && djo.sclust != djn.sclust) { /* Update .. entry in the directory if needed */
dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
if (!dw) {
res = FR_INT_ERR;
} else {
res = move_window(djo.fs, dw);
dir = djo.fs->win+SZ_DIR; /* .. entry */
if (res == FR_OK && dir[1] == '.') {
st_clust(dir, djn.sclust);
djo.fs->wflag = 1;
}
}
}
if (res == FR_OK) {
res = dir_remove(&djo); /* Remove old entry */
if (res == FR_OK)
res = sync_fs(djo.fs);
}
}
/* End of critical section */
}
}
}
FREE_BUF();
}
LEAVE_FF(djo.fs, res);
}
/*-----------------------------------------------------------------------*/
/* Change Timestamp */
/*-----------------------------------------------------------------------*/
FRESULT f_utime (
const TCHAR* path, /* Pointer to the file/directory name */
const FILINFO* fno /* Pointer to the time stamp to be set */
)
{
FRESULT res;
DIR dj;
BYTE *dir;
DEF_NAMEBUF;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 1);
if (res == FR_OK) {
INIT_BUF(dj);
res = follow_path(&dj, path); /* Follow the file path */
FREE_BUF();
if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
res = FR_INVALID_NAME;
if (res == FR_OK) {
dir = dj.dir;
if (!dir) { /* Root directory */
res = FR_INVALID_NAME;
} else { /* File or sub-directory */
ST_WORD(dir+DIR_WrtTime, fno->ftime);
ST_WORD(dir+DIR_WrtDate, fno->fdate);
dj.fs->wflag = 1;
res = sync_fs(dj.fs);
}
}
}
LEAVE_FF(dj.fs, res);
}
#endif /* !_FS_READONLY */
#endif /* _FS_MINIMIZE == 0 */
#endif /* _FS_MINIMIZE <= 1 */
#endif /* _FS_MINIMIZE <= 2 */
#if _USE_LABEL
/*-----------------------------------------------------------------------*/
/* Get volume label */
/*-----------------------------------------------------------------------*/
FRESULT f_getlabel (
const TCHAR* path, /* Path name of the logical drive number */
TCHAR* label, /* Pointer to a buffer to return the volume label */
DWORD* vsn /* Pointer to a variable to return the volume serial number */
)
{
FRESULT res;
DIR dj;
UINT i, j;
/* Get logical drive number */
res = find_volume(&dj.fs, &path, 0);
/* Get volume label */
if (res == FR_OK && label) {
dj.sclust = 0; /* Open root directory */
res = dir_sdi(&dj, 0);
if (res == FR_OK) {
res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
if (res == FR_OK) { /* A volume label is exist */
#if _USE_LFN && _LFN_UNICODE
WCHAR w;
i = j = 0;
do {
w = (i < 11) ? dj.dir[i++] : ' ';
if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i]))
w = w << 8 | dj.dir[i++];
label[j++] = ff_convert(w, 1); /* OEM -> Unicode */
} while (j < 11);
#else
mem_cpy(label, dj.dir, 11);
#endif
j = 11;
do {
label[j] = 0;
if (!j) break;
} while (label[--j] == ' ');
}
if (res == FR_NO_FILE) { /* No label, return nul string */
label[0] = 0;
res = FR_OK;
}
}
}
/* Get volume serial number */
if (res == FR_OK && vsn) {
res = move_window(dj.fs, dj.fs->volbase);
if (res == FR_OK) {
i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID;
*vsn = LD_DWORD(&dj.fs->win[i]);
}
}
LEAVE_FF(dj.fs, res);
}
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Set volume label */
/*-----------------------------------------------------------------------*/
FRESULT f_setlabel (
const TCHAR* label /* Pointer to the volume label to set */
)
{
FRESULT res;
DIR dj;
BYTE vn[11];
UINT i, j, sl;
WCHAR w;
DWORD tm;
/* Get logical drive number */
res = find_volume(&dj.fs, &label, 1);
if (res) LEAVE_FF(dj.fs, res);
/* Create a volume label in directory form */
vn[0] = 0;
for (sl = 0; label[sl]; sl++) ; /* Get name length */
for ( ; sl && label[sl-1] == ' '; sl--) ; /* Remove trailing spaces */
if (sl) { /* Create volume label in directory form */
i = j = 0;
do {
#if _USE_LFN && _LFN_UNICODE
w = ff_convert(ff_wtoupper(label[i++]), 0);
#else
w = (BYTE)label[i++];
if (IsDBCS1(w))
w = (j < 10 && i < sl && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;
#if _USE_LFN
w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0);
#else
if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */
#ifdef _EXCVT
if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */
#else
if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */
#endif
#endif
#endif
if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid characters for volume label */
LEAVE_FF(dj.fs, FR_INVALID_NAME);
if (w >= 0x100) vn[j++] = (BYTE)(w >> 8);
vn[j++] = (BYTE)w;
} while (i < sl);
while (j < 11) vn[j++] = ' ';
}
/* Set volume label */
dj.sclust = 0; /* Open root directory */
res = dir_sdi(&dj, 0);
if (res == FR_OK) {
res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
if (res == FR_OK) { /* A volume label is found */
if (vn[0]) {
mem_cpy(dj.dir, vn, 11); /* Change the volume label name */
tm = GET_FATTIME();
ST_DWORD(dj.dir+DIR_WrtTime, tm);
} else {
dj.dir[0] = DDE; /* Remove the volume label */
}
dj.fs->wflag = 1;
res = sync_fs(dj.fs);
} else { /* No volume label is found or error */
if (res == FR_NO_FILE) {
res = FR_OK;
if (vn[0]) { /* Create volume label as new */
res = dir_alloc(&dj, 1); /* Allocate an entry for volume label */
if (res == FR_OK) {
mem_set(dj.dir, 0, SZ_DIR); /* Set volume label */
mem_cpy(dj.dir, vn, 11);
dj.dir[DIR_Attr] = AM_VOL;
tm = GET_FATTIME();
ST_DWORD(dj.dir+DIR_WrtTime, tm);
dj.fs->wflag = 1;
res = sync_fs(dj.fs);
}
}
}
}
}
LEAVE_FF(dj.fs, res);
}
#endif /* !_FS_READONLY */
#endif /* _USE_LABEL */
/*-----------------------------------------------------------------------*/
/* Forward data to the stream directly (available on only tiny cfg) */
/*-----------------------------------------------------------------------*/
#if _USE_FORWARD && _FS_TINY
FRESULT f_forward (
FIL* fp, /* Pointer to the file object */
UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
UINT btf, /* Number of bytes to forward */
UINT* bf /* Pointer to number of bytes forwarded */
)
{
FRESULT res;
DWORD remain, clst, sect;
UINT rcnt;
BYTE csect;
*bf = 0; /* Clear transfer byte counter */
res = validate(fp); /* Check validity of the object */
if (res != FR_OK) LEAVE_FF(fp->fs, res);
if (fp->err) /* Check error */
LEAVE_FF(fp->fs, (FRESULT)fp->err);
if (!(fp->flag & FA_READ)) /* Check access mode */
LEAVE_FF(fp->fs, FR_DENIED);
remain = fp->fsize - fp->fptr;
if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */
fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
if (!csect) { /* On the cluster boundary? */
clst = (fp->fptr == 0) ? /* On the top of the file? */
fp->sclust : get_fat(fp->fs, fp->clust);
if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
fp->clust = clst; /* Update current cluster */
}
}
sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */
if (!sect) ABORT(fp->fs, FR_INT_ERR);
sect += csect;
if (move_window(fp->fs, sect) != FR_OK) /* Move sector window */
ABORT(fp->fs, FR_DISK_ERR);
fp->dsect = sect;
rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
if (rcnt > btf) rcnt = btf;
rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
}
LEAVE_FF(fp->fs, FR_OK);
}
#endif /* _USE_FORWARD */
#if _USE_MKFS && !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Create File System on the Drive */
/*-----------------------------------------------------------------------*/
#define N_ROOTDIR 512 /* Number of root directory entries for FAT12/16 */
#define N_FATS 1 /* Number of FATs (1 or 2) */
FRESULT f_mkfs (
const TCHAR* path, /* Logical drive number */
BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */
UINT au /* Size of allocation unit in unit of byte or sector */
)
{
static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0};
static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
int vol;
BYTE fmt, md, sys, *tbl, pdrv, part;
DWORD n_clst, vs, n, wsect;
UINT i;
DWORD b_vol, b_fat, b_dir, b_data; /* LBA */
DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */
FATFS *fs;
DSTATUS stat;
/* Check mounted drive and clear work area */
if (sfd > 1) return FR_INVALID_PARAMETER;
vol = get_ldnumber(&path);
if (vol < 0) return FR_INVALID_DRIVE;
fs = FatFs[vol];
if (!fs) return FR_NOT_ENABLED;
fs->fs_type = 0;
pdrv = LD2PD(vol); /* Physical drive */
part = LD2PT(vol); /* Partition (0:auto detect, 1-4:get from partition table)*/
/* Get disk statics */
stat = disk_initialize(pdrv);
if (stat & STA_NOINIT) return FR_NOT_READY;
if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
#if _MAX_SS != _MIN_SS /* Get disk sector size */
if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS || SS(fs) < _MIN_SS)
return FR_DISK_ERR;
#endif
if (_MULTI_PARTITION && part) {
/* Get partition information from partition table in the MBR */
if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
if (LD_WORD(fs->win+BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */
b_vol = LD_DWORD(tbl+8); /* Volume start sector */
n_vol = LD_DWORD(tbl+12); /* Volume size */
} else {
/* Create a partition in this function */
if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128)
return FR_DISK_ERR;
b_vol = (sfd) ? 0 : 63; /* Volume start sector */
n_vol -= b_vol; /* Volume size */
}
if (au & (au - 1)) au = 0;
if (!au) { /* AU auto selection */
vs = n_vol / (2000 / (SS(fs) / 512));
for (i = 0; vs < vst[i]; i++) ;
au = cst[i];
}
if (au >= _MIN_SS) au /= SS(fs); /* Number of sectors per cluster */
if (!au) au = 1;
if (au > 128) au = 128;
/* Pre-compute number of clusters and FAT sub-type */
n_clst = n_vol / au;
fmt = FS_FAT12;
if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
/* Determine offset and size of FAT structure */
if (fmt == FS_FAT32) {
n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
n_rsv = 32;
n_dir = 0;
} else {
n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
n_fat = (n_fat + SS(fs) - 1) / SS(fs);
n_rsv = 1;
n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs);
}
b_fat = b_vol + n_rsv; /* FAT area start sector */
b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */
b_data = b_dir + n_dir; /* Data area start sector */
if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */
/* Align data start sector to erase block boundary (for flash memory media) */
if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1;
n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */
n = (n - b_data) / N_FATS;
if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */
n_rsv += n;
b_fat += n;
} else { /* FAT12/16: Expand FAT size */
n_fat += n;
}
/* Determine number of clusters and final check of validity of the FAT sub-type */
n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16)
|| (fmt == FS_FAT32 && n_clst < MIN_FAT32))
return FR_MKFS_ABORTED;
/* Determine system ID in the partition table */
if (fmt == FS_FAT32) {
sys = 0x0C; /* FAT32X */
} else {
if (fmt == FS_FAT12 && n_vol < 0x10000) {
sys = 0x01; /* FAT12(<65536) */
} else {
sys = (n_vol < 0x10000) ? 0x04 : 0x06; /* FAT16(<65536) : FAT12/16(>=65536) */
}
}
if (_MULTI_PARTITION && part) {
/* Update system ID in the partition table */
tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
tbl[4] = sys;
if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to teh MBR */
return FR_DISK_ERR;
md = 0xF8;
} else {
if (sfd) { /* No partition table (SFD) */
md = 0xF0;
} else { /* Create partition table (FDISK) */
mem_set(fs->win, 0, SS(fs));
tbl = fs->win+MBR_Table; /* Create partition table for single partition in the drive */
tbl[1] = 1; /* Partition start head */
tbl[2] = 1; /* Partition start sector */
tbl[3] = 0; /* Partition start cylinder */
tbl[4] = sys; /* System type */
tbl[5] = 254; /* Partition end head */
n = (b_vol + n_vol) / 63 / 255;
tbl[6] = (BYTE)(n >> 2 | 63); /* Partition end sector */
tbl[7] = (BYTE)n; /* End cylinder */
ST_DWORD(tbl+8, 63); /* Partition start in LBA */
ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */
ST_WORD(fs->win+BS_55AA, 0xAA55); /* MBR signature */
if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR */
return FR_DISK_ERR;
md = 0xF8;
}
}
/* Create BPB in the VBR */
tbl = fs->win; /* Clear sector */
mem_set(tbl, 0, SS(fs));
mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
i = SS(fs); /* Sector size */
ST_WORD(tbl+BPB_BytsPerSec, i);
tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */
ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of root directory entries */
ST_WORD(tbl+BPB_RootEntCnt, i);
if (n_vol < 0x10000) { /* Number of total sectors */
ST_WORD(tbl+BPB_TotSec16, n_vol);
} else {
ST_DWORD(tbl+BPB_TotSec32, n_vol);
}
tbl[BPB_Media] = md; /* Media descriptor */
ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */
ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */
ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */
n = GET_FATTIME(); /* Use current time as VSN */
if (fmt == FS_FAT32) {
ST_DWORD(tbl+BS_VolID32, n); /* VSN */
ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */
ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */
ST_WORD(tbl+BPB_FSInfo, 1); /* FSINFO record offset (VBR+1) */
ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */
tbl[BS_DrvNum32] = 0x80; /* Drive number */
tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
mem_cpy(tbl+BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
} else {
ST_DWORD(tbl+BS_VolID, n); /* VSN */
ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */
tbl[BS_DrvNum] = 0x80; /* Drive number */
tbl[BS_BootSig] = 0x29; /* Extended boot signature */
mem_cpy(tbl+BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
}
ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */
if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */
return FR_DISK_ERR;
if (fmt == FS_FAT32) /* Write backup VBR if needed (VBR+6) */
disk_write(pdrv, tbl, b_vol + 6, 1);
/* Initialize FAT area */
wsect = b_fat;
for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */
mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
n = md; /* Media descriptor byte */
if (fmt != FS_FAT32) {
n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */
} else {
n |= 0xFFFFFF00;
ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */
ST_DWORD(tbl+4, 0xFFFFFFFF);
ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root directory */
}
if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
return FR_DISK_ERR;
mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */
for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */
if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
return FR_DISK_ERR;
}
}
/* Initialize root directory */
i = (fmt == FS_FAT32) ? au : (UINT)n_dir;
do {
if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
return FR_DISK_ERR;
} while (--i);
#if _USE_TRIM /* Erase data area if needed */
{
DWORD eb[2];
eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1;
disk_ioctl(pdrv, CTRL_TRIM, eb);
}
#endif
/* Create FSINFO if needed */
if (fmt == FS_FAT32) {
ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
ST_DWORD(tbl+FSI_Free_Count, n_clst - 1); /* Number of free clusters */
ST_DWORD(tbl+FSI_Nxt_Free, 2); /* Last allocated cluster# */
ST_WORD(tbl+BS_55AA, 0xAA55);
disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR+1) */
disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR+7) */
}
return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR;
}
#if _MULTI_PARTITION
/*-----------------------------------------------------------------------*/
/* Divide Physical Drive */
/*-----------------------------------------------------------------------*/
FRESULT f_fdisk (
BYTE pdrv, /* Physical drive number */
const DWORD szt[], /* Pointer to the size table for each partitions */
void* work /* Pointer to the working buffer */
)
{
UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
DSTATUS stat;
DWORD sz_disk, sz_part, s_part;
stat = disk_initialize(pdrv);
if (stat & STA_NOINIT) return FR_NOT_READY;
if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
/* Determine CHS in the table regardless of the drive geometry */
for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
if (n == 256) n--;
e_hd = n - 1;
sz_cyl = 63 * n;
tot_cyl = sz_disk / sz_cyl;
/* Create partition table */
mem_set(buf, 0, _MAX_SS);
p = buf + MBR_Table; b_cyl = 0;
for (i = 0; i < 4; i++, p += SZ_PTE) {
p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;
if (!p_cyl) continue;
s_part = (DWORD)sz_cyl * b_cyl;
sz_part = (DWORD)sz_cyl * p_cyl;
if (i == 0) { /* Exclude first track of cylinder 0 */
s_hd = 1;
s_part += 63; sz_part -= 63;
} else {
s_hd = 0;
}
e_cyl = b_cyl + p_cyl - 1;
if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
/* Set partition table */
p[1] = s_hd; /* Start head */
p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */
p[3] = (BYTE)b_cyl; /* Start cylinder */
p[4] = 0x06; /* System type (temporary setting) */
p[5] = e_hd; /* End head */
p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */
p[7] = (BYTE)e_cyl; /* End cylinder */
ST_DWORD(p + 8, s_part); /* Start sector in LBA */
ST_DWORD(p + 12, sz_part); /* Partition size */
/* Next partition */
b_cyl += p_cyl;
}
ST_WORD(p, 0xAA55);
/* Write it to the MBR */
return (disk_write(pdrv, buf, 0, 1) != RES_OK || disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK;
}
#endif /* _MULTI_PARTITION */
#endif /* _USE_MKFS && !_FS_READONLY */
#if _USE_STRFUNC
/*-----------------------------------------------------------------------*/
/* Get a string from the file */
/*-----------------------------------------------------------------------*/
TCHAR* f_gets (
TCHAR* buff, /* Pointer to the string buffer to read */
int len, /* Size of string buffer (characters) */
FIL* fp /* Pointer to the file object */
)
{
int n = 0;
TCHAR c, *p = buff;
BYTE s[2];
UINT rc;
while (n < len - 1) { /* Read characters until buffer gets filled */
#if _USE_LFN && _LFN_UNICODE
#if _STRF_ENCODE == 3 /* Read a character in UTF-8 */
f_read(fp, s, 1, &rc);
if (rc != 1) break;
c = s[0];
if (c >= 0x80) {
if (c < 0xC0) continue; /* Skip stray trailer */
if (c < 0xE0) { /* Two-byte sequence */
f_read(fp, s, 1, &rc);
if (rc != 1) break;
c = (c & 0x1F) << 6 | (s[0] & 0x3F);
if (c < 0x80) c = '?';
} else {
if (c < 0xF0) { /* Three-byte sequence */
f_read(fp, s, 2, &rc);
if (rc != 2) break;
c = c << 12 | (s[0] & 0x3F) << 6 | (s[1] & 0x3F);
if (c < 0x800) c = '?';
} else { /* Reject four-byte sequence */
c = '?';
}
}
}
#elif _STRF_ENCODE == 2 /* Read a character in UTF-16BE */
f_read(fp, s, 2, &rc);
if (rc != 2) break;
c = s[1] + (s[0] << 8);
#elif _STRF_ENCODE == 1 /* Read a character in UTF-16LE */
f_read(fp, s, 2, &rc);
if (rc != 2) break;
c = s[0] + (s[1] << 8);
#else /* Read a character in ANSI/OEM */
f_read(fp, s, 1, &rc);
if (rc != 1) break;
c = s[0];
if (IsDBCS1(c)) {
f_read(fp, s, 1, &rc);
if (rc != 1) break;
c = (c << 8) + s[0];
}
c = ff_convert(c, 1); /* OEM -> Unicode */
if (!c) c = '?';
#endif
#else /* Read a character without conversion */
f_read(fp, s, 1, &rc);
if (rc != 1) break;
c = s[0];
#endif
if (_USE_STRFUNC == 2 && c == '\r') continue; /* Strip '\r' */
*p++ = c;
n++;
if (c == '\n') break; /* Break on EOL */
}
*p = 0;
return n ? buff : 0; /* When no data read (eof or error), return with error. */
}
#if !_FS_READONLY
#include <stdarg.h>
/*-----------------------------------------------------------------------*/
/* Put a character to the file */
/*-----------------------------------------------------------------------*/
typedef struct {
FIL* fp;
int idx, nchr;
BYTE buf[64];
} putbuff;
static
void putc_bfd (
putbuff* pb,
TCHAR c
)
{
UINT bw;
int i;
if (_USE_STRFUNC == 2 && c == '\n') /* LF -> CRLF conversion */
putc_bfd(pb, '\r');
i = pb->idx; /* Buffer write index (-1:error) */
if (i < 0) return;
#if _USE_LFN && _LFN_UNICODE
#if _STRF_ENCODE == 3 /* Write a character in UTF-8 */
if (c < 0x80) { /* 7-bit */
pb->buf[i++] = (BYTE)c;
} else {
if (c < 0x800) { /* 11-bit */
pb->buf[i++] = (BYTE)(0xC0 | c >> 6);
} else { /* 16-bit */
pb->buf[i++] = (BYTE)(0xE0 | c >> 12);
pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F));
}
pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F));
}
#elif _STRF_ENCODE == 2 /* Write a character in UTF-16BE */
pb->buf[i++] = (BYTE)(c >> 8);
pb->buf[i++] = (BYTE)c;
#elif _STRF_ENCODE == 1 /* Write a character in UTF-16LE */
pb->buf[i++] = (BYTE)c;
pb->buf[i++] = (BYTE)(c >> 8);
#else /* Write a character in ANSI/OEM */
c = ff_convert(c, 0); /* Unicode -> OEM */
if (!c) c = '?';
if (c >= 0x100)
pb->buf[i++] = (BYTE)(c >> 8);
pb->buf[i++] = (BYTE)c;
#endif
#else /* Write a character without conversion */
pb->buf[i++] = (BYTE)c;
#endif
if (i >= (int)(sizeof pb->buf) - 3) { /* Write buffered characters to the file */
f_write(pb->fp, pb->buf, (UINT)i, &bw);
i = (bw == (UINT)i) ? 0 : -1;
}
pb->idx = i;
pb->nchr++;
}
int f_putc (
TCHAR c, /* A character to be output */
FIL* fp /* Pointer to the file object */
)
{
putbuff pb;
UINT nw;
pb.fp = fp; /* Initialize output buffer */
pb.nchr = pb.idx = 0;
putc_bfd(&pb, c); /* Put a character */
if ( pb.idx >= 0 /* Flush buffered characters to the file */
&& f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
&& (UINT)pb.idx == nw) return pb.nchr;
return EOF;
}
/*-----------------------------------------------------------------------*/
/* Put a string to the file */
/*-----------------------------------------------------------------------*/
int f_puts (
const TCHAR* str, /* Pointer to the string to be output */
FIL* fp /* Pointer to the file object */
)
{
putbuff pb;
UINT nw;
pb.fp = fp; /* Initialize output buffer */
pb.nchr = pb.idx = 0;
while (*str) /* Put the string */
putc_bfd(&pb, *str++);
if ( pb.idx >= 0 /* Flush buffered characters to the file */
&& f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
&& (UINT)pb.idx == nw) return pb.nchr;
return EOF;
}
/*-----------------------------------------------------------------------*/
/* Put a formatted string to the file */
/*-----------------------------------------------------------------------*/
int f_printf (
FIL* fp, /* Pointer to the file object */
const TCHAR* fmt, /* Pointer to the format string */
... /* Optional arguments... */
)
{
va_list arp;
BYTE f, r;
UINT nw, i, j, w;
DWORD v;
TCHAR c, d, s[16], *p;
putbuff pb;
pb.fp = fp; /* Initialize output buffer */
pb.nchr = pb.idx = 0;
va_start(arp, fmt);
for (;;) {
c = *fmt++;
if (c == 0) break; /* End of string */
if (c != '%') { /* Non escape character */
putc_bfd(&pb, c);
continue;
}
w = f = 0;
c = *fmt++;
if (c == '0') { /* Flag: '0' padding */
f = 1; c = *fmt++;
} else {
if (c == '-') { /* Flag: left justified */
f = 2; c = *fmt++;
}
}
while (IsDigit(c)) { /* Precision */
w = w * 10 + c - '0';
c = *fmt++;
}
if (c == 'l' || c == 'L') { /* Prefix: Size is long int */
f |= 4; c = *fmt++;
}
if (!c) break;
d = c;
if (IsLower(d)) d -= 0x20;
switch (d) { /* Type is... */
case 'S' : /* String */
p = va_arg(arp, TCHAR*);
for (j = 0; p[j]; j++) ;
if (!(f & 2)) {
while (j++ < w) putc_bfd(&pb, ' ');
}
while (*p) putc_bfd(&pb, *p++);
while (j++ < w) putc_bfd(&pb, ' ');
continue;
case 'C' : /* Character */
putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue;
case 'B' : /* Binary */
r = 2; break;
case 'O' : /* Octal */
r = 8; break;
case 'D' : /* Signed decimal */
case 'U' : /* Unsigned decimal */
r = 10; break;
case 'X' : /* Hexdecimal */
r = 16; break;
default: /* Unknown type (pass-through) */
putc_bfd(&pb, c); continue;
}
/* Get an argument and put it in numeral */
v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int));
if (d == 'D' && (v & 0x80000000)) {
v = 0 - v;
f |= 8;
}
i = 0;
do {
d = (TCHAR)(v % r); v /= r;
if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
s[i++] = d + '0';
} while (v && i < sizeof s / sizeof s[0]);
if (f & 8) s[i++] = '-';
j = i; d = (f & 1) ? '0' : ' ';
while (!(f & 2) && j++ < w) putc_bfd(&pb, d);
do putc_bfd(&pb, s[--i]); while (i);
while (j++ < w) putc_bfd(&pb, d);
}
va_end(arp);
if ( pb.idx >= 0 /* Flush buffered characters to the file */
&& f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
&& (UINT)pb.idx == nw) return pb.nchr;
return EOF;
}
#endif /* !_FS_READONLY */
#endif /* _USE_STRFUNC */
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