text: /*----------------------------------------------------------------------------/
  /  FatFs - FAT file system module  R0.10b                (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.
  /---------------------------------------------------------------------------*/
  
  #include "ff.h"			/* Declarations of FatFs API */
  #include "diskio.h"		/* Declarations of disk I/O functions */
  
  
  
  
  /*--------------------------------------------------------------------------
  
     Module Private Definitions
  
  ---------------------------------------------------------------------------*/
  
  #if _FATFS != 8051	/* 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
  
  
  /* File access control feature */
  #if _FS_LOCK
  #if _FS_READONLY
  #error _FS_LOCK must be 0 at read-only cfg.
  #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 NS			11		/* Index of name status byte in fn[] */
  #define NS_LOSS		0x01	/* Out of 8.3 format */
  #define NS_LFN		0x02	/* Force to create LFN entry */
  #define NS_LAST		0x04	/* Last segment */
  #define NS_BODY		0x08	/* Lower case flag (body) */
  #define NS_EXT		0x10	/* Lower case flag (ext) */
  #define NS_DOT		0x20	/* Dot entry */
  
  
  /* FAT sub-type boundaries */
  #define MIN_FAT16	4086U	/* Minimum number of clusters for FAT16 */
  #define	MIN_FAT32	65526U	/* Minimum number of clusters for FAT32 */
  
  
  /* FatFs refers the members in the FAT structures as byte array instead of
  / structure member because the structure is not binary compatible between
  / different platforms */
  
  #define BS_jmpBoot			0		/* Jump instruction (3) */
  #define BS_OEMName			3		/* OEM name (8) */
  #define BPB_BytsPerSec		11		/* Sector size [byte] (2) */
  #define BPB_SecPerClus		13		/* Cluster size [sector] (1) */
  #define BPB_RsvdSecCnt		14		/* Size of reserved area [sector] (2) */
  #define BPB_NumFATs			16		/* Number of FAT copies (1) */
  #define BPB_RootEntCnt		17		/* Number of root 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                                   */
  /*------------------------------------------------------------*/
  /* Note that uninitialized variables with static duration are
  /  guaranteed zero/null as initial value. If not, either the
  /  linker or start-up routine is out of ANSI-C standard.
  */
  
  #if _VOLUMES >= 1 || _VOLUMES <= 10
  static
  FATFS *FatFs[_VOLUMES];		/* Pointer to the file system objects (logical drives) */
  #else
  #error Number of volumes must be 1 to 10.
  #endif
  
  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			/* No LFN feature */
  #define	DEF_NAMEBUF			BYTE sfn[12]
  #define INIT_BUF(dobj)		(dobj).fn = sfn
  #define	FREE_BUF()
  
  #elif _USE_LFN == 1			/* LFN feature with static working buffer */
  static
  WCHAR LfnBuf[_MAX_LFN+1];
  #define	DEF_NAMEBUF			BYTE sfn[12]
  #define INIT_BUF(dobj)		{ (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
  #define	FREE_BUF()
  
  #elif _USE_LFN == 2 		/* LFN feature with dynamic working buffer on the stack */
  #define	DEF_NAMEBUF			BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1]
  #define INIT_BUF(dobj)		{ (dobj).fn = sfn; (dobj).lfn = lbuf; }
  #define	FREE_BUF()
  
  #elif _USE_LFN == 3 		/* LFN feature with dynamic working buffer on the heap */
  #define	DEF_NAMEBUF			BYTE sfn[12]; WCHAR *lfn
  #define INIT_BUF(dobj)		{ lfn = ff_memalloc((_MAX_LFN + 1) * 2); \
  							  if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \
  							  (dobj).lfn = lfn;	(dobj).fn = sfn; }
  #define	FREE_BUF()			ff_memfree(lfn)
  
  #else
  #error Wrong LFN configuration.
  #endif
  
  
  #ifdef _EXCVT
  static
  const BYTE ExCvt[] = _EXCVT;	/* Upper conversion table for extended characters */
  #endif
  
  
  
  
  
  
  /*--------------------------------------------------------------------------
  
     Module Private Functions
  
  ---------------------------------------------------------------------------*/
  DWORD clust2sect (FATFS* fs, DWORD clst);
  DWORD get_fat (FATFS* fs,	DWORD clst);
  
  #if !_FS_READONLY
  FRESULT put_fat (FATFS* fs,	DWORD clst,	DWORD val);
  #endif /* !_FS_READONLY */
  
  #if _USE_LFN
  static void gen_numname (BYTE* dst, const BYTE* src, const WCHAR* lfn, UINT seq);
  #endif /* !_USE_LFN */
  
  
  
  /*-----------------------------------------------------------------------*/
  /* 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;
  
  
  	if (fs->wflag) {	/* Write back the sector if it is dirty */
  		wsect = fs->winsect;	/* Current sector number */
  		if (disk_write(fs->drv, fs->win.d8, wsect, 1))
  			return FR_DISK_ERR;
  		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.d8, wsect, 1);
  			}
  		}
  	}
  	return FR_OK;
  }
  #endif
  
  
  static
  FRESULT move_window (
  	FATFS* fs,		/* File system object */
  	DWORD sector	/* Sector number to make appearance in the fs->win[].d8 */
  )
  {
  	if (sector != fs->winsect) {	/* Changed current window */
  #if !_FS_READONLY
  		if (sync_window(fs) != FR_OK)
  			return FR_DISK_ERR;
  #endif
  		if (disk_read(fs->drv, fs->win.d8, sector, 1))
  			return FR_DISK_ERR;
  		fs->winsect = sector;
  	}
  
  	return FR_OK;
  }
  
  
  
  
  /*-----------------------------------------------------------------------*/
  /* Synchronize file system and strage device                             */
  /*-----------------------------------------------------------------------*/
  #if !_FS_READONLY
  static
  FRESULT sync_fs (	/* FR_OK: successful, FR_DISK_ERR: failed */
  	FATFS* fs		/* File system object */
  )
  {
  	FRESULT res;
  
  
  	res = sync_window(fs);
  	if (res == FR_OK) {
  		/* Update FSINFO sector if needed */
  		if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) {
  			/* Create FSINFO structure */
  			mem_set(fs->win.d8, 0, SS(fs));
  			ST_WORD(fs->win.d8+BS_55AA, 0xAA55);
  			ST_DWORD(fs->win.d8+FSI_LeadSig, 0x41615252);
  			ST_DWORD(fs->win.d8+FSI_StrucSig, 0x61417272);
  			ST_DWORD(fs->win.d8+FSI_Free_Count, fs->free_clust);
  			ST_DWORD(fs->win.d8+FSI_Nxt_Free, fs->last_clust);
  			/* Write it into the FSINFO sector */
  			fs->winsect = fs->volbase + 1;
  			disk_write(fs->drv, fs->win.d8, 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#                                             */
  /*-----------------------------------------------------------------------*/
  
  
  DWORD clust2sect (	/* !=0: Sector number, 0: Failed - invalid cluster# */
  	FATFS* fs,		/* File system object */
  	DWORD clst		/* Cluster# to be converted */
  )
  {
  	clst -= 2;
  	if (clst >= (fs->n_fatent - 2)) return 0;		/* Invalid cluster# */
  	return clst * fs->csize + fs->database;
  }
  
  
  
  
  /*-----------------------------------------------------------------------*/
  /* FAT access - Read value of a FAT entry                                */
  /*-----------------------------------------------------------------------*/
  
  
  DWORD get_fat (	/* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */
  	FATFS* fs,	/* File system object */
  	DWORD clst	/* Cluster# to get the link information */
  )
  {
  	UINT wc, bc;
  	BYTE *p;
  
  
  	if (clst < 2 || clst >= fs->n_fatent)	/* Check range */
  		return 1;
  
  	switch (fs->fs_type) {
  	case FS_FAT12 :
  		bc = (UINT)clst; bc += bc / 2;
  		if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
  		wc = fs->win.d8[bc % SS(fs)]; bc++;
  		if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
  		wc |= fs->win.d8[bc % SS(fs)] << 8;
  		return clst & 1 ? wc >> 4 : (wc & 0xFFF);
  
  	case FS_FAT16 :
  		if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break;
  		p = &fs->win.d8[clst * 2 % SS(fs)];
  		return LD_WORD(p);
  
  	case FS_FAT32 :
  		if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break;
  		p = &fs->win.d8[clst * 4 % SS(fs)];
  		return LD_DWORD(p) & 0x0FFFFFFF;
  
  	default:
  		return 1;
  	}
  
  	return 0xFFFFFFFF;	/* An error occurred at the disk I/O layer */
  }
  
  
  
  
  /*-----------------------------------------------------------------------*/
  /* FAT access - Change value of a FAT entry                              */
  /*-----------------------------------------------------------------------*/
  #if !_FS_READONLY
  
  FRESULT put_fat (
  	FATFS* fs,	/* File system object */
  	DWORD clst,	/* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */
  	DWORD val	/* New value to mark the cluster */
  )
  {
  	UINT bc;
  	BYTE *p;
  	FRESULT res;
  
  
  	if (clst < 2 || clst >= fs->n_fatent) {	/* Check range */
  		res = FR_INT_ERR;
  
  	} else {
  		switch (fs->fs_type) {
  		case FS_FAT12 :
  			bc = (UINT)clst; bc += bc / 2;
  			res = move_window(fs, fs->fatbase + (bc / SS(fs)));
  			if (res != FR_OK) break;
  			p = &fs->win.d8[bc % SS(fs)];
  			*p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
  			bc++;
  			fs->wflag = 1;
  			res = move_window(fs, fs->fatbase + (bc / SS(fs)));
  			if (res != FR_OK) break;
  			p = &fs->win.d8[bc % SS(fs)];
  			*p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
  			break;
  
  		case FS_FAT16 :
  			res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
  			if (res != FR_OK) break;
  			p = &fs->win.d8[clst * 2 % SS(fs)];
  			ST_WORD(p, (WORD)val);
  			break;
  
  		case FS_FAT32 :
  			res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
  			if (res != FR_OK) break;
  			p = &fs->win.d8[clst * 4 % SS(fs)];
  			val |= LD_DWORD(p) & 0xF0000000;
  			ST_DWORD(p, val);
  			break;
  
  		default :
  			res = FR_INT_ERR;
  		}
  		fs->wflag = 1;
  	}
  
  	return res;
  }
  #endif /* !_FS_READONLY */
  
  
  
  
  /*-----------------------------------------------------------------------*/
  /* FAT handling - Remove a cluster chain                                 */
  /*-----------------------------------------------------------------------*/
  #if !_FS_READONLY
  static
  FRESULT remove_chain (
  	FATFS* fs,			/* File system object */
  	DWORD clst			/* Cluster# to remove a chain from */
  )
  {
  	FRESULT res;
  	DWORD nxt;
  #if _USE_ERASE
  	DWORD scl = clst, ecl = clst, rt[2];
  #endif
  
  	if (clst < 2 || clst >= fs->n_fatent) {	/* Check range */
  		res = FR_INT_ERR;
  
  	} else {
  		res = FR_OK;
  		while (clst < fs->n_fatent) {			/* Not a last link? */
  			nxt = get_fat(fs, clst);			/* Get cluster status */
  			if (nxt == 0) break;				/* Empty cluster? */
  			if (nxt == 1) { res = FR_INT_ERR; break; }	/* Internal error? */
  			if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }	/* Disk error? */
  			res = put_fat(fs, clst, 0);			/* Mark the cluster "empty" */
  			if (res != FR_OK) break;
  			if (fs->free_clust != 0xFFFFFFFF) {	/* Update FSINFO */
  				fs->free_clust++;
  				fs->fsi_flag |= 1;
  			}
  #if _USE_ERASE
  			if (ecl + 1 == nxt) {	/* Is next cluster contiguous? */
  				ecl = nxt;
  			} else {				/* End of contiguous clusters */ 
  				rt[0] = clust2sect(fs, scl);					/* Start sector */
  				rt[1] = clust2sect(fs, ecl) + fs->csize - 1;	/* End sector */
  				disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, rt);		/* Erase the block */
  				scl = ecl = nxt;
  			}
  #endif
  			clst = nxt;	/* Next cluster */
  		}
  	}
  
  	return res;
  }
  #endif
  
  
  
  
  /*-----------------------------------------------------------------------*/
  /* FAT handling - Stretch or Create a cluster chain                      */
  /*-----------------------------------------------------------------------*/
  #if !_FS_READONLY
  static
  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.d8 + (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.d8, 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.d8 + (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 blank entry? */
  				if (++n == nent) break;	/* A block of contiguous 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[NS] & 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[NS] & NS_DOT))		/* Cannot create dot entry */
  		return FR_INVALID_NAME;
  
  	if (sn[NS] & NS_LOSS) {			/* When LFN is out of 8.3 format, generate a numbered name */
  		fn[NS] = 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[NS] = sn[NS]; dp->lfn = lfn;
  	}
  
  	if (sn[NS] & 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[NS] & (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) */
  #if _DF1S
                          b = (BYTE)p[si++];			/* Get 2nd byte */
  			if (!IsDBCS2(b))
  				return FR_INVALID_NAME;	/* Reject invalid sequence */
  			w = (w << 8) + b;			/* Create a DBC */
  #endif
  		}
  		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[NS] = 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[NS] = (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[NS] = 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[NS];
  			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.d8[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.d8[BS_FilSysType]) & 0xFFFFFF) == 0x544146)		/* Check "FAT" string */
  		return 0;
  	if ((LD_DWORD(&fs->win.d8[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.d8+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.d8+BPB_BytsPerSec) != SS(fs))		/* (BPB_BytsPerSec must be equal to the physical sector size) */
  		return FR_NO_FILESYSTEM;
  
  	fasize = LD_WORD(fs->win.d8+BPB_FATSz16);				/* Number of sectors per FAT */
  	if (!fasize) fasize = LD_DWORD(fs->win.d8+BPB_FATSz32);
  	fs->fsize = fasize;
  
  	fs->n_fats = fs->win.d8[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.d8[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.d8+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.d8+BPB_TotSec16);				/* Number of sectors on the volume */
  	if (!tsect) tsect = LD_DWORD(fs->win.d8+BPB_TotSec32);
  
  	nrsv = LD_WORD(fs->win.d8+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.d8+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 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.d8+BPB_FSInfo) == 1
  		&& move_window(fs, bsect + 1) == FR_OK)
  	{
  		fs->fsi_flag = 0;
  		if (LD_WORD(fs->win.d8+BS_55AA) == 0xAA55	/* Load FSINFO data if available */
  			&& LD_DWORD(fs->win.d8+FSI_LeadSig) == 0x41615252
  			&& LD_DWORD(fs->win.d8+FSI_StrucSig) == 0x61417272)
  		{
  #if (_FS_NOFSINFO & 1) == 0
  			fs->free_clust = LD_DWORD(fs->win.d8+FSI_Free_Count);
  #endif
  #if (_FS_NOFSINFO & 2) == 0
  			fs->last_clust = LD_DWORD(fs->win.d8+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))
  					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.d8, SS(fp->fs));
  #else
  				if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
  					mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf.d8, 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.d8, fp->dsect, 1))
  						ABORT(fp->fs, FR_DISK_ERR);
  					fp->flag &= ~FA__DIRTY;
  				}
  #endif
  				if (disk_read(fp->fs->drv, fp->buf.d8, sect, 1))	/* 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))		/* Move sector window */
  			ABORT(fp->fs, FR_DISK_ERR);
  		mem_cpy(rbuff, &fp->fs->win.d8[fp->fptr % SS(fp->fs)], rcnt);	/* Pick partial sector */
  #else
  		mem_cpy(rbuff, &fp->buf.d8[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.d8, fp->dsect, 1))
  					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))
  					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.d8, 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.d8, 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.d8, sect, 1))
  						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))	/* Move sector window */
  			ABORT(fp->fs, FR_DISK_ERR);
  		mem_cpy(&fp->fs->win.d8[fp->fptr % SS(fp->fs)], wbuff, wcnt);	/* Fit partial sector */
  		fp->fs->wflag = 1;
  #else
  		mem_cpy(&fp->buf.d8[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.d8, fp->dsect, 1))
  					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.d8, fp->dsect, 1))
  							ABORT(fp->fs, FR_DISK_ERR);
  						fp->flag &= ~FA__DIRTY;
  					}
  #endif
  					if (disk_read(fp->fs->drv, fp->buf.d8, dsc, 1))	/* 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.d8, fp->dsect, 1))
  					ABORT(fp->fs, FR_DISK_ERR);
  				fp->flag &= ~FA__DIRTY;
  			}
  #endif
  			if (disk_read(fp->fs->drv, fp->buf.d8, nsect, 1))	/* 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.d8;
  						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.d8, fp->dsect, 1))
  					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;
  	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[NS] & 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 file */
  #endif
  		if (res == FR_OK) {					/* The object is accessible */
  			dir = dj.dir;
  			if (!dir) {
  				res = FR_INVALID_NAME;		/* Cannot remove the start directory */
  			} else {
  				if (dir[DIR_Attr] & AM_RDO)
  					res = FR_DENIED;		/* Cannot remove R/O object */
  			}
  			dclst = ld_clust(dj.fs, dir);
  			if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) {	/* Is it a sub-dir? */
  				if (dclst < 2) {
  					res = FR_INT_ERR;
  				} else {
  					mem_cpy(&sdj, &dj, sizeof (DIR));	/* Check if the sub-directory is empty or not */
  					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	/* Current directory */
  #endif
  						) res = FR_DENIED;
  						if (res == FR_NO_FILE) res = FR_OK;	/* Empty */
  					}
  				}
  			}
  			if (res == FR_OK) {
  				res = dir_remove(&dj);		/* Remove the directory entry */
  				if (res == FR_OK) {
  					if (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[NS] & 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.d8;
  				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[NS] & 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);
  }
  
  
  
  
  /*-----------------------------------------------------------------------*/
  /* 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[NS] & 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);
  }
  
  
  
  
  /*-----------------------------------------------------------------------*/
  /* 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[NS] & 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 check if new object is exist */
  				else
  					res = FR_INVALID_DRIVE;
  				if (res == FR_OK) res = FR_EXIST;		/* The new object name is already existing */
  				if (res == FR_NO_FILE) { 				/* Is it a valid path and no name collision? */
  /* Start 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 (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) {		/* 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.d8+SZ_DIR;	/* .. entry */
  								if (res == FR_OK && dir[1] == '.') {
  									dw = (djo.fs->fs_type == FS_FAT32 && djn.sclust == djo.fs->dirbase) ? 0 : djn.sclust;
  									st_clust(dir, dw);
  									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 critical section */
  				}
  			}
  		}
  		FREE_BUF();
  	}
  
  	LEAVE_FF(djo.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.d8[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))				/* 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.d8[(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 FAT copies (1 or 2) */
  
  
  FRESULT f_mkfs (
  	const TCHAR* path,	/* Logical drive number */
  	BYTE sfd,			/* Partitioning rule 0:FDISK, 1:SFD */
  	UINT au				/* Allocation unit [bytes] */
  )
  {
  	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 */
  	vol = get_ldnumber(&path);
  	if (vol < 0) return FR_INVALID_DRIVE;
  	if (sfd > 1) return FR_INVALID_PARAMETER;
  	if (au & (au - 1)) return FR_INVALID_PARAMETER;
  	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.d8, 0, 1)) return FR_DISK_ERR;
  		if (LD_WORD(fs->win.d8+BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
  		tbl = &fs->win.d8[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 auto selection */
  		vs = n_vol / (2000 / (SS(fs) / 512));
  		for (i = 0; vs < vst[i]; i++) ;
  		au = cst[i];
  	}
  	au /= SS(fs);		/* Number of sectors per cluster */
  	if (au == 0) 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.d8[MBR_Table + (part - 1) * SZ_PTE];
  		tbl[4] = sys;
  		if (disk_write(pdrv, fs->win.d8, 0, 1))	/* 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.d8, 0, SS(fs));
  			tbl = fs->win.d8+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.d8+BS_55AA, 0xAA55);	/* MBR signature */
  			if (disk_write(pdrv, fs->win.d8, 0, 1))	/* Write it to the MBR */
  				return FR_DISK_ERR;
  			md = 0xF8;
  		}
  	}
  
  	/* Create BPB in the VBR */
  	tbl = fs->win.d8;							/* 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))	/* 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))
  			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))
  				return FR_DISK_ERR;
  		}
  	}
  
  	/* Initialize root directory */
  	i = (fmt == FS_FAT32) ? au : (UINT)n_dir;
  	do {
  		if (disk_write(pdrv, tbl, wsect++, 1))
  			return FR_DISK_ERR;
  	} while (--i);
  
  #if _USE_ERASE	/* 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_ERASE_SECTOR, 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) || disk_ioctl(pdrv, CTRL_SYNC, 0)) ? 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 */
  