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openblt/Target/Source/third_party/fatfs/src/ff.c

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/*----------------------------------------------------------------------------/
/ FatFs - FAT file system module R0.09b (C)ChaN, 2013
/-----------------------------------------------------------------------------/
/ FatFs module is a generic FAT file system module for small embedded systems.
/ This is a free software that opened for education, research and commercial
/ developments under license policy of following terms.
/
/ Copyright (C) 2013, ChaN, all right reserved.
/
/ * The FatFs module is a free software and there is NO WARRANTY.
/ * No restriction on use. You can use, modify and redistribute it for
/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
/ * Redistributions of source code must retain the above copyright notice.
/
/-----------------------------------------------------------------------------/
/ Feb 26,'06 R0.00 Prototype.
/
/ Apr 29,'06 R0.01 First stable version.
/
/ Jun 01,'06 R0.02 Added FAT12 support.
/ Removed unbuffered mode.
/ Fixed a problem on small (<32M) partition.
/ Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
/
/ Sep 22,'06 R0.03 Added f_rename().
/ Changed option _FS_MINIMUM to _FS_MINIMIZE.
/ Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast.
/ Fixed f_mkdir() creates incorrect directory on FAT32.
/
/ Feb 04,'07 R0.04 Supported multiple drive system.
/ Changed some interfaces for multiple drive system.
/ Changed f_mountdrv() to f_mount().
/ Added f_mkfs().
/ Apr 01,'07 R0.04a Supported multiple partitions on a physical drive.
/ Added a capability of extending file size to f_lseek().
/ Added minimization level 3.
/ Fixed an endian sensitive code in f_mkfs().
/ May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
/ Added FSInfo support.
/ Fixed DBCS name can result FR_INVALID_NAME.
/ Fixed short seek (<= csize) collapses the file object.
/
/ Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs().
/ Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
/ Fixed f_mkdir() on FAT32 creates incorrect directory.
/ Feb 03,'08 R0.05a Added f_truncate() and f_utime().
/ Fixed off by one error at FAT sub-type determination.
/ Fixed btr in f_read() can be mistruncated.
/ Fixed cached sector is not flushed when create and close without write.
/
/ Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets().
/ Improved performance of f_lseek() on moving to the same or following cluster.
/
/ Apr 01,'09 R0.07 Merged Tiny-FatFs as a configuration option. (_FS_TINY)
/ Added long file name feature.
/ Added multiple code page feature.
/ Added re-entrancy for multitask operation.
/ Added auto cluster size selection to f_mkfs().
/ Added rewind option to f_readdir().
/ Changed result code of critical errors.
/ Renamed string functions to avoid name collision.
/ Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
/ Added multiple sector size feature.
/ Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
/ Fixed wrong cache control in f_lseek().
/ Added relative path feature.
/ Added f_chdir() and f_chdrive().
/ Added proper case conversion to extended char.
/ Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
/ Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
/ Fixed name matching error on the 13 char boundary.
/ Added a configuration option, _LFN_UNICODE.
/ Changed f_readdir() to return the SFN with always upper case on non-LFN cfg.
/
/ May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN = 3)
/ Added file lock feature. (_FS_SHARE)
/ Added fast seek feature. (_USE_FASTSEEK)
/ Changed some types on the API, XCHAR->TCHAR.
/ Changed fname member in the FILINFO structure on Unicode cfg.
/ String functions support UTF-8 encoding files on Unicode cfg.
/ Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2)
/ Added sector erase feature. (_USE_ERASE)
/ Moved file lock semaphore table from fs object to the bss.
/ Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'.
/ Fixed f_mkfs() creates wrong FAT32 volume.
/ Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write().
/ f_lseek() reports required table size on creating CLMP.
/ Extended format syntax of f_printf function.
/ Ignores duplicated directory separators in given path name.
/
/ Sep 06,'11 R0.09 f_mkfs() supports multiple partition to finish the multiple partition feature.
/ Added f_fdisk(). (_MULTI_PARTITION = 2)
/ Aug 27,'12 R0.09a Fixed assertion failure due to OS/2 EA on FAT12/16 volume.
/ Changed f_open() and f_opendir reject null object pointer to avoid crash.
/ Changed option name _FS_SHARE to _FS_LOCK.
/ Jan 24,'13 R0.09b Added f_setlabel() and f_getlabel(). (_USE_LABEL = 1)
/---------------------------------------------------------------------------*/
#include "ff.h" /* FatFs configurations and declarations */
#include "diskio.h" /* Declarations of low level disk I/O functions */
/*--------------------------------------------------------------------------
Module Private Definitions
---------------------------------------------------------------------------*/
#if _FATFS != 82786 /* Revision ID */
#error Wrong include file (ff.h).
#endif
/* Definitions on sector size */
#if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096
#error Wrong sector size.
#endif
#if _MAX_SS != 512
#define SS(fs) ((fs)->ssize) /* Variable sector size */
#else
#define SS(fs) 512U /* Fixed sector size */
#endif
/* Reentrancy related */
#if _FS_REENTRANT
#if _USE_LFN == 1
#error Static LFN work area must not be used in re-entrant configuration.
#endif
#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
#else
#define ENTER_FF(fs)
#define LEAVE_FF(fs, res) return res
#endif
#define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
/* File access control feature */
#if _FS_LOCK
#if _FS_READONLY
#error _FS_LOCK must be 0 on read-only cfg.
#endif
typedef struct
{
FATFS *fs; /* File ID 1, volume (NULL:blank entry) */
DWORD clu; /* File ID 2, directory */
WORD idx; /* File ID 3, directory index */
WORD ctr; /* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */
} FILESEM;
#endif
/* DBCS code ranges and SBCS extend char conversion table */
#if _CODE_PAGE == 932 /* Japanese Shift-JIS */
#define _DF1S 0x81 /* DBC 1st byte range 1 start */
#define _DF1E 0x9F /* DBC 1st byte range 1 end */
#define _DF2S 0xE0 /* DBC 1st byte range 2 start */
#define _DF2E 0xFC /* DBC 1st byte range 2 end */
#define _DS1S 0x40 /* DBC 2nd byte range 1 start */
#define _DS1E 0x7E /* DBC 2nd byte range 1 end */
#define _DS2S 0x80 /* DBC 2nd byte range 2 start */
#define _DS2E 0xFC /* DBC 2nd byte range 2 end */
#elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
#define _DF1S 0x81
#define _DF1E 0xFE
#define _DS1S 0x40
#define _DS1E 0x7E
#define _DS2S 0x80
#define _DS2E 0xFE
#elif _CODE_PAGE == 949 /* Korean */
#define _DF1S 0x81
#define _DF1E 0xFE
#define _DS1S 0x41
#define _DS1E 0x5A
#define _DS2S 0x61
#define _DS2E 0x7A
#define _DS3S 0x81
#define _DS3E 0xFE
#elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
#define _DF1S 0x81
#define _DF1E 0xFE
#define _DS1S 0x40
#define _DS1E 0x7E
#define _DS2S 0xA1
#define _DS2E 0xFE
#elif _CODE_PAGE == 437 /* U.S. (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F,0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 720 /* Arabic (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x45,0x41,0x84,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x49,0x49,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 737 /* Greek (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 775 /* Baltic (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 852 /* Latin 2 (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F,0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0x9F, \
0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
#elif _CODE_PAGE == 855 /* Cyrillic (OEM) */
#define _DF1S 0
#define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F,0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 857 /* Turkish (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x98,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 862 /* Hebrew (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 866 /* Russian (OEM) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 1250 /* Central Europe (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xA3,0xB4,0xB5,0xB6,0xB7,0xB8,0xA5,0xAA,0xBB,0xBC,0xBD,0xBC,0xAF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
#elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x82,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x80,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
0xA0,0xA2,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB2,0xA5,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xA3,0xBD,0xBD,0xAF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF}
#elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0xAd,0x9B,0x8C,0x9D,0xAE,0x9F, \
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
#elif _CODE_PAGE == 1253 /* Greek (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xA2,0xB8,0xB9,0xBA, \
0xE0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xFB,0xBC,0xFD,0xBF,0xFF}
#elif _CODE_PAGE == 1254 /* Turkish (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x9D,0x9E,0x9F, \
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
#elif _CODE_PAGE == 1255 /* Hebrew (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 1256 /* Arabic (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x8C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0x41,0xE1,0x41,0xE3,0xE4,0xE5,0xE6,0x43,0x45,0x45,0x45,0x45,0xEC,0xED,0x49,0x49,0xF0,0xF1,0xF2,0xF3,0x4F,0xF5,0xF6,0xF7,0xF8,0x55,0xFA,0x55,0x55,0xFD,0xFE,0xFF}
#elif _CODE_PAGE == 1257 /* Baltic (Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xBC,0xBD,0xBE,0xAF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
#elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */
#define _DF1S 0
#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0xAC,0x9D,0x9E,0x9F, \
0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xEC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xFE,0x9F}
#elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
#if _USE_LFN
#error Cannot use LFN feature without valid code page.
#endif
#define _DF1S 0
#else
#error Unknown code page
#endif
/* Character code support macros */
#define IsUpper(c) (((c)>='A')&&((c)<='Z'))
#define IsLower(c) (((c)>='a')&&((c)<='z'))
#define IsDigit(c) (((c)>='0')&&((c)<='9'))
#if _DF1S /* Code page is DBCS */
#ifdef _DF2S /* Two 1st byte areas */
#define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
#else /* One 1st byte area */
#define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
#endif
#ifdef _DS3S /* Three 2nd byte areas */
#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
#else /* Two 2nd byte areas */
#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
#endif
#else /* Code page is SBCS */
#define IsDBCS1(c) 0
#define IsDBCS2(c) 0
#endif /* _DF1S */
/* Name status flags */
#define NS 11 /* Index of name status byte in fn[] */
#define NS_LOSS 0x01 /* Out of 8.3 format */
#define NS_LFN 0x02 /* Force to create LFN entry */
#define NS_LAST 0x04 /* Last segment */
#define NS_BODY 0x08 /* Lower case flag (body) */
#define NS_EXT 0x10 /* Lower case flag (ext) */
#define NS_DOT 0x20 /* Dot entry */
/* FAT sub-type boundaries */
/* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */
#define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */
#define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */
/* FatFs refers the members in the FAT structures as byte array instead of
/ structure member because the structure is not binary compatible between
/ different platforms */
#define BS_jmpBoot 0 /* Jump instruction (3) */
#define BS_OEMName 3 /* OEM name (8) */
#define BPB_BytsPerSec 11 /* Sector size [byte] (2) */
#define BPB_SecPerClus 13 /* Cluster size [sector] (1) */
#define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */
#define BPB_NumFATs 16 /* Number of FAT copies (1) */
#define BPB_RootEntCnt 17 /* Number of root dir entries for FAT12/16 (2) */
#define BPB_TotSec16 19 /* Volume size [sector] (2) */
#define BPB_Media 21 /* Media descriptor (1) */
#define BPB_FATSz16 22 /* FAT size [sector] (2) */
#define BPB_SecPerTrk 24 /* Track size [sector] (2) */
#define BPB_NumHeads 26 /* Number of heads (2) */
#define BPB_HiddSec 28 /* Number of special hidden sectors (4) */
#define BPB_TotSec32 32 /* Volume size [sector] (4) */
#define BS_DrvNum 36 /* Physical drive number (2) */
#define BS_BootSig 38 /* Extended boot signature (1) */
#define BS_VolID 39 /* Volume serial number (4) */
#define BS_VolLab 43 /* Volume label (8) */
#define BS_FilSysType 54 /* File system type (1) */
#define BPB_FATSz32 36 /* FAT size [sector] (4) */
#define BPB_ExtFlags 40 /* Extended flags (2) */
#define BPB_FSVer 42 /* File system version (2) */
#define BPB_RootClus 44 /* Root dir first cluster (4) */
#define BPB_FSInfo 48 /* Offset of FSInfo sector (2) */
#define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */
#define BS_DrvNum32 64 /* Physical drive number (2) */
#define BS_BootSig32 66 /* Extended boot signature (1) */
#define BS_VolID32 67 /* Volume serial number (4) */
#define BS_VolLab32 71 /* Volume label (8) */
#define BS_FilSysType32 82 /* File system type (1) */
#define FSI_LeadSig 0 /* FSI: Leading signature (4) */
#define FSI_StrucSig 484 /* FSI: Structure signature (4) */
#define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */
#define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */
#define MBR_Table 446 /* MBR: Partition table offset (2) */
#define SZ_PTE 16 /* MBR: Size of a partition table entry */
#define BS_55AA 510 /* Boot sector signature (2) */
#define DIR_Name 0 /* Short file name (11) */
#define DIR_Attr 11 /* Attribute (1) */
#define DIR_NTres 12 /* NT flag (1) */
#define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */
#define DIR_CrtTime 14 /* Created time (2) */
#define DIR_CrtDate 16 /* Created date (2) */
#define DIR_LstAccDate 18 /* Last accessed date (2) */
#define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */
#define DIR_WrtTime 22 /* Modified time (2) */
#define DIR_WrtDate 24 /* Modified date (2) */
#define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */
#define DIR_FileSize 28 /* File size (4) */
#define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */
#define LDIR_Attr 11 /* LFN attribute (1) */
#define LDIR_Type 12 /* LFN type (1) */
#define LDIR_Chksum 13 /* Sum of corresponding SFN entry */
#define LDIR_FstClusLO 26 /* Filled by zero (0) */
#define SZ_DIR 32 /* Size of a directory entry */
#define LLE 0x40 /* Last long entry flag in LDIR_Ord */
#define DDE 0xE5 /* Deleted directory entry mark in DIR_Name[0] */
#define NDDE 0x05 /* Replacement of the character collides with DDE */
/*------------------------------------------------------------*/
/* Module private work area */
/*------------------------------------------------------------*/
/* Note that uninitialized variables with static duration are
/ zeroed/nulled at start-up. If not, the compiler or start-up
/ routine is out of ANSI-C standard.
*/
#if _VOLUMES
static
FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */
#else
#error Number of volumes must not be 0.
#endif
static
WORD Fsid; /* File system mount ID */
#if _FS_RPATH
static
BYTE CurrVol; /* Current drive */
#endif
#if _FS_LOCK
static
FILESEM Files[_FS_LOCK]; /* File lock semaphores */
#endif
#if _USE_LFN == 0 /* No LFN feature */
#define DEF_NAMEBUF BYTE sfn[12]
#define INIT_BUF(dobj) (dobj).fn = sfn
#define FREE_BUF()
#elif _USE_LFN == 1 /* LFN feature with static working buffer */
static WCHAR LfnBuf[_MAX_LFN+1];
#define DEF_NAMEBUF BYTE sfn[12]
#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
#define FREE_BUF()
#elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */
#define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1]
#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; }
#define FREE_BUF()
#elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */
#define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn
#define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \
if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \
(dobj).lfn = lfn; (dobj).fn = sfn; }
#define FREE_BUF() ff_memfree(lfn)
#else
#error Wrong LFN configuration.
#endif
#ifdef _EXCVT
static
const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for extended chars */
#endif
/*--------------------------------------------------------------------------
Module Private Functions
---------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------*/
/* String functions */
/*-----------------------------------------------------------------------*/
/* Copy memory to memory */
static
void mem_cpy(void *dst, const void *src, UINT cnt)
{
BYTE *d = (BYTE *)dst;
const BYTE *s = (const BYTE *)src;
#if _WORD_ACCESS == 1
while (cnt >= sizeof(int))
{
*(int *)d = *(int *)s;
d += sizeof(int);
s += sizeof(int);
cnt -= sizeof(int);
}
#endif
while (cnt--)
{
*d++ = *s++;
}
}
/* Fill memory */
static
void mem_set(void *dst, int val, UINT cnt)
{
BYTE *d = (BYTE *)dst;
while (cnt--)
{
*d++ = (BYTE)val;
}
}
/* Compare memory to memory */
static
int mem_cmp(const void *dst, const void *src, UINT cnt)
{
const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
int r = 0;
while (cnt-- && (r = *d++ - *s++) == 0) ;
return r;
}
/* Check if chr is contained in the string */
static
int chk_chr(const char *str, int chr)
{
while (*str && *str != chr)
{
str++;
}
return *str;
}
/*-----------------------------------------------------------------------*/
/* Request/Release grant to access the volume */
/*-----------------------------------------------------------------------*/
#if _FS_REENTRANT
static
int lock_fs(
FATFS *fs /* File system object */
)
{
return ff_req_grant(fs->sobj);
}
static
void unlock_fs(
FATFS *fs, /* File system object */
FRESULT res /* Result code to be returned */
)
{
if (fs &&
res != FR_NOT_ENABLED &&
res != FR_INVALID_DRIVE &&
res != FR_INVALID_OBJECT &&
res != FR_TIMEOUT)
{
ff_rel_grant(fs->sobj);
}
}
#endif
/*-----------------------------------------------------------------------*/
/* File lock control functions */
/*-----------------------------------------------------------------------*/
#if _FS_LOCK
static
FRESULT chk_lock( /* Check if the file can be accessed */
DIR *dj, /* Directory object pointing the file to be checked */
int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
)
{
UINT i, be;
/* Search file semaphore table */
for (i = be = 0; i < _FS_LOCK; i++)
{
if (Files[i].fs) /* Existing entry */
{
if (Files[i].fs == dj->fs && /* Check if the file matched with an open file */
Files[i].clu == dj->sclust &&
Files[i].idx == dj->index)
{
break;
}
}
else /* Blank entry */
{
be++;
}
}
if (i == _FS_LOCK) /* The file is not opened */
{
return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new file? */
}
/* The file has been opened. Reject any open against writing file and all write mode open */
return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
}
static
int enq_lock(void) /* Check if an entry is available for a new file */
{
UINT i;
for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
return (i == _FS_LOCK) ? 0 : 1;
}
static
UINT inc_lock( /* Increment file open counter and returns its index (0:int error) */
DIR *dj, /* Directory object pointing the file to register or increment */
int acc /* Desired access mode (0:Read, !0:Write) */
)
{
UINT i;
for (i = 0; i < _FS_LOCK; i++) /* Find the file */
{
if (Files[i].fs == dj->fs &&
Files[i].clu == dj->sclust &&
Files[i].idx == dj->index)
{
break;
}
}
if (i == _FS_LOCK) /* Not opened. Register it as new. */
{
for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
if (i == _FS_LOCK)
{
return 0; /* No space to register (int err) */
}
Files[i].fs = dj->fs;
Files[i].clu = dj->sclust;
Files[i].idx = dj->index;
Files[i].ctr = 0;
}
if (acc && Files[i].ctr)
{
return 0; /* Access violation (int err) */
}
Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
return i + 1;
}
static
FRESULT dec_lock( /* Decrement file open counter */
UINT i /* Semaphore index */
)
{
WORD n;
FRESULT res;
if (--i < _FS_LOCK)
{
n = Files[i].ctr;
if (n == 0x100)
{
n = 0;
}
if (n)
{
n--;
}
Files[i].ctr = n;
if (!n)
{
Files[i].fs = 0;
}
res = FR_OK;
}
else
{
res = FR_INT_ERR;
}
return res;
}
static
void clear_lock( /* Clear lock entries of the volume */
FATFS *fs
)
{
UINT i;
for (i = 0; i < _FS_LOCK; i++)
{
if (Files[i].fs == fs)
{
Files[i].fs = 0;
}
}
}
#endif
/*-----------------------------------------------------------------------*/
/* Move/Flush disk access window */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT sync_window(
FATFS *fs /* File system object */
)
{
DWORD wsect;
UINT nf;
if (fs->wflag) /* Write back the sector if it is dirty */
{
wsect = fs->winsect; /* Current sector number */
if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK)
{
return FR_DISK_ERR;
}
fs->wflag = 0;
if (wsect >= fs->fatbase && wsect < (fs->fatbase + fs->fsize)) /* In FAT area? */
{
for (nf = fs->n_fats; nf >= 2; nf--) /* Reflect the change to all FAT copies */
{
wsect += fs->fsize;
disk_write(fs->drv, fs->win, wsect, 1);
}
}
}
return FR_OK;
}
#endif
static
FRESULT move_window(
FATFS *fs, /* File system object */
DWORD sector /* Sector number to make appearance in the fs->win[] */
)
{
if (sector != fs->winsect) /* Changed current window */
{
#if !_FS_READONLY
if (sync_window(fs) != FR_OK)
{
return FR_DISK_ERR;
}
#endif
if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK)
{
return FR_DISK_ERR;
}
fs->winsect = sector;
}
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Synchronize file system and strage device */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT sync_fs( /* FR_OK: successful, FR_DISK_ERR: failed */
FATFS *fs /* File system object */
)
{
FRESULT res;
res = sync_window(fs);
if (res == FR_OK)
{
/* Update FSInfo sector if needed */
if (fs->fs_type == FS_FAT32 && fs->fsi_flag)
{
fs->winsect = 0;
/* Create FSInfo structure */
mem_set(fs->win, 0, 512);
ST_WORD(fs->win+BS_55AA, 0xAA55);
ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
/* Write it into the FSInfo sector */
disk_write(fs->drv, fs->win, fs->fsi_sector, 1);
fs->fsi_flag = 0;
}
/* Make sure that no pending write process in the physical drive */
if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
{
res = FR_DISK_ERR;
}
}
return res;
}
#endif
/*-----------------------------------------------------------------------*/
/* Get sector# from cluster# */
/*-----------------------------------------------------------------------*/
DWORD clust2sect( /* !=0: Sector number, 0: Failed - invalid cluster# */
FATFS *fs, /* File system object */
DWORD clst /* Cluster# to be converted */
)
{
clst -= 2;
if (clst >= (fs->n_fatent - 2))
{
return 0; /* Invalid cluster# */
}
return clst * fs->csize + fs->database;
}
/*-----------------------------------------------------------------------*/
/* FAT access - Read value of a FAT entry */
/*-----------------------------------------------------------------------*/
DWORD get_fat( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */
FATFS *fs, /* File system object */
DWORD clst /* Cluster# to get the link information */
)
{
UINT wc, bc;
BYTE *p;
if (clst < 2 || clst >= fs->n_fatent) /* Check range */
{
return 1;
}
switch (fs->fs_type)
{
case FS_FAT12 :
bc = (UINT)clst;
bc += bc / 2;
if (move_window(fs, fs->fatbase + (bc / SS(fs))))
{
break;
}
wc = fs->win[bc % SS(fs)];
bc++;
if (move_window(fs, fs->fatbase + (bc / SS(fs))))
{
break;
}
wc |= fs->win[bc % SS(fs)] << 8;
return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
case FS_FAT16 :
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))))
{
break;
}
p = &fs->win[clst * 2 % SS(fs)];
return LD_WORD(p);
case FS_FAT32 :
if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))))
{
break;
}
p = &fs->win[clst * 4 % SS(fs)];
return LD_DWORD(p) & 0x0FFFFFFF;
}
return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */
}
/*-----------------------------------------------------------------------*/
/* FAT access - Change value of a FAT entry */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
FRESULT put_fat(
FATFS *fs, /* File system object */
DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */
DWORD val /* New value to mark the cluster */
)
{
UINT bc;
BYTE *p;
FRESULT res;
if (clst < 2 || clst >= fs->n_fatent) /* Check range */
{
res = FR_INT_ERR;
}
else
{
switch (fs->fs_type)
{
case FS_FAT12 :
bc = (UINT)clst;
bc += bc / 2;
res = move_window(fs, fs->fatbase + (bc / SS(fs)));
if (res != FR_OK)
{
break;
}
p = &fs->win[bc % SS(fs)];
*p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
bc++;
fs->wflag = 1;
res = move_window(fs, fs->fatbase + (bc / SS(fs)));
if (res != FR_OK)
{
break;
}
p = &fs->win[bc % SS(fs)];
*p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
break;
case FS_FAT16 :
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
if (res != FR_OK)
{
break;
}
p = &fs->win[clst * 2 % SS(fs)];
ST_WORD(p, (WORD)val);
break;
case FS_FAT32 :
res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
if (res != FR_OK)
{
break;
}
p = &fs->win[clst * 4 % SS(fs)];
val |= LD_DWORD(p) & 0xF0000000;
ST_DWORD(p, val);
break;
default :
res = FR_INT_ERR;
}
fs->wflag = 1;
}
return res;
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* FAT handling - Remove a cluster chain */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT remove_chain(
FATFS *fs, /* File system object */
DWORD clst /* Cluster# to remove a chain from */
)
{
FRESULT res;
DWORD nxt;
#if _USE_ERASE
DWORD scl = clst, ecl = clst, rt[2];
#endif
if (clst < 2 || clst >= fs->n_fatent) /* Check range */
{
res = FR_INT_ERR;
}
else
{
res = FR_OK;
while (clst < fs->n_fatent) /* Not a last link? */
{
nxt = get_fat(fs, clst); /* Get cluster status */
if (nxt == 0)
{
break; /* Empty cluster? */
}
if (nxt == 1)
{
res = FR_INT_ERR; /* Internal error? */
break;
}
if (nxt == 0xFFFFFFFF)
{
res = FR_DISK_ERR; /* Disk error? */
break;
}
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; /* It is an invalid cluster */
}
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) /* 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 *dj, /* Pointer to directory object */
WORD idx /* Index of directory table */
)
{
DWORD clst;
WORD ic;
dj->index = idx;
clst = dj->sclust;
if (clst == 1 || clst >= dj->fs->n_fatent) /* Check start cluster range */
{
return FR_INT_ERR;
}
if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
{
clst = dj->fs->dirbase;
}
if (clst == 0) /* Static table (root-dir in FAT12/16) */
{
dj->clust = clst;
if (idx >= dj->fs->n_rootdir) /* Index is out of range */
{
return FR_INT_ERR;
}
dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */
}
else /* Dynamic table (sub-dirs or root-dir in FAT32) */
{
ic = SS(dj->fs) / SZ_DIR * dj->fs->csize; /* Entries per cluster */
while (idx >= ic) /* Follow cluster chain */
{
clst = get_fat(dj->fs, clst); /* Get next cluster */
if (clst == 0xFFFFFFFF)
{
return FR_DISK_ERR; /* Disk error */
}
if (clst < 2 || clst >= dj->fs->n_fatent) /* Reached to end of table or int error */
{
return FR_INT_ERR;
}
idx -= ic;
}
dj->clust = clst;
dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */
}
dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */
return FR_OK; /* Seek succeeded */
}
/*-----------------------------------------------------------------------*/
/* 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 *dj, /* Pointer to the directory object */
int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
)
{
DWORD clst;
WORD i;
stretch = stretch; /* To suppress warning on read-only cfg. */
i = dj->index + 1;
if (!i || !dj->sect) /* Report EOT when index has reached 65535 */
{
return FR_NO_FILE;
}
if (!(i % (SS(dj->fs) / SZ_DIR))) /* Sector changed? */
{
dj->sect++; /* Next sector */
if (dj->clust == 0) /* Static table */
{
if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */
{
return FR_NO_FILE;
}
}
else /* Dynamic table */
{
if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) /* Cluster changed? */
{
clst = get_fat(dj->fs, dj->clust); /* Get next cluster */
if (clst <= 1)
{
return FR_INT_ERR;
}
if (clst == 0xFFFFFFFF)
{
return FR_DISK_ERR;
}
if (clst >= dj->fs->n_fatent) /* When it reached end of dynamic table */
{
#if !_FS_READONLY
BYTE c;
if (!stretch)
{
return FR_NO_FILE; /* When do not stretch, report EOT */
}
clst = create_chain(dj->fs, dj->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(dj->fs))
{
return FR_DISK_ERR; /* Flush active window */
}
mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */
dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */
for (c = 0; c < dj->fs->csize; c++) /* Fill the new cluster with 0 */
{
dj->fs->wflag = 1;
if (sync_window(dj->fs))
{
return FR_DISK_ERR;
}
dj->fs->winsect++;
}
dj->fs->winsect -= c; /* Rewind window address */
#else
return FR_NO_FILE; /* Report EOT */
#endif
}
dj->clust = clst; /* Initialize data for new cluster */
dj->sect = clust2sect(dj->fs, clst);
}
}
}
dj->index = i;
dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR;
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Directory handling - Reserve directory entry */
/*-----------------------------------------------------------------------*/
#if !_FS_READONLY
static
FRESULT dir_alloc(
DIR *dj, /* Pointer to the directory object */
UINT nent /* Number of contiguous entries to allocate (1-21) */
)
{
FRESULT res;
UINT n;
res = dir_sdi(dj, 0);
if (res == FR_OK)
{
n = 0;
do
{
res = move_window(dj->fs, dj->sect);
if (res != FR_OK)
{
break;
}
if (dj->dir[0] == DDE || dj->dir[0] == 0) /* Is it a blank entry? */
{
if (++n == nent)
{
break; /* A block of contiguous entry is found */
}
}
else
{
n = 0; /* Not a blank entry. Restart to search */
}
res = dir_next(dj, 1); /* Next entry with table stretch enabled */
}
while (res == FR_OK);
}
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 chars 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 char 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 chars 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 char 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 char */
}
ST_WORD(dir+LfnOfs[s], wc); /* Put it */
if (!wc)
{
wc = 0xFFFF; /* Padding chars following last char */
}
}
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
void gen_numname(
BYTE *dst, /* Pointer to generated SFN */
const BYTE *src, /* Pointer to source SFN to be modified */
const WCHAR *lfn, /* Pointer to LFN */
WORD 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 */
{
do
{
seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++;
}
while (*lfn);
}
/* 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 /* Ptr to directory 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 *dj /* 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(dj, 0); /* Rewind directory object */
if (res != FR_OK)
{
return res;
}
#if _USE_LFN
ord = sum = 0xFF;
#endif
do
{
res = move_window(dj->fs, dj->sect);
if (res != FR_OK)
{
break;
}
dir = dj->dir; /* Ptr to the directory entry of current index */
c = dir[DIR_Name];
if (c == 0)
{
res = FR_NO_FILE; /* Reached to end of table */
break;
}
#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;
}
else
{
if (a == AM_LFN) /* An LFN entry is found */
{
if (dj->lfn)
{
if (c & LLE) /* Is it start of LFN sequence? */
{
sum = dir[LDIR_Chksum];
c &= ~LLE;
ord = c; /* LFN start order */
dj->lfn_idx = dj->index;
}
/* Check validity of the LFN entry and compare it with given name */
ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
}
}
else /* An SFN entry is found */
{
if (!ord && sum == sum_sfn(dir))
{
break; /* LFN matched? */
}
ord = 0xFF;
dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */
if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11))
{
break; /* SFN matched? */
}
}
}
#else /* Non LFN configuration */
if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
{
break;
}
#endif
res = dir_next(dj, 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 *dj, /* Pointer to the directory object */
int vol /* Filtered by 0:file/dir or 1:volume label */
)
{
FRESULT res;
BYTE a, c, *dir;
#if _USE_LFN
BYTE ord = 0xFF, sum = 0xFF;
#endif
res = FR_NO_FILE;
while (dj->sect)
{
res = move_window(dj->fs, dj->sect);
if (res != FR_OK)
{
break;
}
dir = dj->dir; /* Ptr to the directory entry of current index */
c = dir[DIR_Name];
if (c == 0)
{
res = FR_NO_FILE; /* Reached to end of table */
break;
}
a = dir[DIR_Attr] & AM_MASK;
#if _USE_LFN /* LFN configuration */
if (c == DDE || (!_FS_RPATH && c == '.') || (a == 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;
dj->lfn_idx = dj->index;
}
/* Check LFN validity and capture it */
ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
}
else /* An SFN entry is found */
{
if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
{
dj->lfn_idx = 0xFFFF; /* It has no LFN. */
}
break;
}
}
#else /* Non LFN configuration */
if (c != DDE && (_FS_RPATH || c != '.') && a != AM_LFN && (a == AM_VOL) == vol) /* Is it a valid entry? */
{
break;
}
#endif
res = dir_next(dj, 0); /* Next entry */
if (res != FR_OK)
{
break;
}
}
if (res != FR_OK)
{
dj->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 *dj /* Target directory with object name to be created */
)
{
FRESULT res;
#if _USE_LFN /* LFN configuration */
WORD n, ne;
BYTE sn[12], *fn, sum;
WCHAR *lfn;
fn = dj->fn;
lfn = dj->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;
dj->lfn = 0; /* Find only SFN */
for (n = 1; n < 100; n++)
{
gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
res = dir_find(dj); /* 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];
dj->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++) ;
ne = (n + 25) / 13;
}
else /* Otherwise allocate an entry for an SFN */
{
ne = 1;
}
res = dir_alloc(dj, ne); /* Allocate entries */
if (res == FR_OK && --ne) /* Set LFN entry if needed */
{
res = dir_sdi(dj, (WORD)(dj->index - ne));
if (res == FR_OK)
{
sum = sum_sfn(dj->fn); /* Sum value of the SFN tied to the LFN */
do /* Store LFN entries in bottom first */
{
res = move_window(dj->fs, dj->sect);
if (res != FR_OK)
{
break;
}
fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
dj->fs->wflag = 1;
res = dir_next(dj, 0); /* Next entry */
}
while (res == FR_OK && --ne);
}
}
#else /* Non LFN configuration */
res = dir_alloc(dj, 1); /* Allocate an entry for SFN */
#endif
if (res == FR_OK) /* Set SFN entry */
{
res = move_window(dj->fs, dj->sect);
if (res == FR_OK)
{
mem_set(dj->dir, 0, SZ_DIR); /* Clean the entry */
mem_cpy(dj->dir, dj->fn, 11); /* Put SFN */
#if _USE_LFN
dj->dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */
#endif
dj->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 *dj /* Directory object pointing the entry to be removed */
)
{
FRESULT res;
#if _USE_LFN /* LFN configuration */
WORD i;
i = dj->index; /* SFN index */
res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */
if (res == FR_OK)
{
do
{
res = move_window(dj->fs, dj->sect);
if (res != FR_OK)
{
break;
}
*dj->dir = DDE; /* Mark the entry "deleted" */
dj->fs->wflag = 1;
if (dj->index >= i)
{
break; /* When reached SFN, all entries of the object has been deleted. */
}
res = dir_next(dj, 0); /* Next entry */
}
while (res == FR_OK);
if (res == FR_NO_FILE)
{
res = FR_INT_ERR;
}
}
#else /* Non LFN configuration */
res = dir_sdi(dj, dj->index);
if (res == FR_OK)
{
res = move_window(dj->fs, dj->sect);
if (res == FR_OK)
{
*dj->dir = DDE; /* Mark the entry "deleted" */
dj->fs->wflag = 1;
}
}
#endif
return res;
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* Pick a segment and create the object name in directory form */
/*-----------------------------------------------------------------------*/
static
FRESULT create_name(
DIR *dj, /* 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 = dj->lfn;
si = di = 0;
for (;;)
{
w = p[si++]; /* Get a character */
if (w < ' ' || w == '/' || w == '\\')
{
break; /* Break on end of segment */
}
if (di >= _MAX_LFN) /* Reject too long name */
{
return FR_INVALID_NAME;
}
#if !_LFN_UNICODE
w &= 0xFF;
if (IsDBCS1(w)) /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
{
b = (BYTE)p[si++]; /* Get 2nd byte */
if (!IsDBCS2(b))
{
return FR_INVALID_NAME; /* Reject invalid sequence */
}
w = (w << 8) + b; /* Create a DBC */
}
w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */
if (!w)
{
return FR_INVALID_NAME; /* Reject invalid code */
}
#endif
if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */
{
return FR_INVALID_NAME;
}
lfn[di++] = w; /* Store the Unicode char */
}
*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++)
{
dj->fn[i] = (i < di) ? '.' : ' ';
}
dj->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(dj->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 char */
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 char */
{
#ifdef _EXCVT
w = ff_convert(w, 0); /* Unicode -> OEM code */
if (w)
{
w = ExCvt[w - 0x80]; /* Convert extended char 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 char (always false on SBCS cfg) */
{
if (i >= ni - 1)
{
cf |= NS_LOSS | NS_LFN;
i = ni;
continue;
}
dj->fn[i++] = (BYTE)(w >> 8);
}
else /* Single byte char */
{
if (!w || chk_chr("+,;=[]", w)) /* Replace illegal chars 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;
}
}
}
}
dj->fn[i++] = (BYTE)w;
}
if (dj->fn[0] == DDE)
{
dj->fn[0] = NDDE; /* If the first char 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 char, 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) */
}
}
dj->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 = dj->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 char? */
{
b |= 3; /* Eliminate NT flag */
#ifdef _EXCVT
c = ExCvt[c - 0x80]; /* To upper extended chars (SBCS cfg) */
#else
#if !_DF1S
return FR_INVALID_NAME; /* Reject extended chars (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 char 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
}
/*-----------------------------------------------------------------------*/
/* Get file information from directory entry */
/*-----------------------------------------------------------------------*/
#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2
static
void get_fileinfo( /* No return code */
DIR *dj, /* Pointer to the directory object */
FILINFO *fno /* Pointer to the file information to be filled */
)
{
UINT i;
BYTE nt, *dir;
TCHAR *p, c;
p = fno->fname;
if (dj->sect)
{
dir = dj->dir;
nt = dir[DIR_NTres]; /* NT flag */
for (i = 0; i < 8; i++) /* Copy name body */
{
c = dir[i];
if (c == ' ')
{
break;
}
if (c == NDDE)
{
c = (TCHAR)DDE;
}
if (_USE_LFN && (nt & NS_BODY) && IsUpper(c))
{
c += 0x20;
}
#if _LFN_UNICODE
if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1]))
{
c = (c << 8) | dir[++i];
}
c = ff_convert(c, 1);
if (!c)
{
c = '?';
}
#endif
*p++ = c;
}
if (dir[8] != ' ') /* Copy name extension */
{
*p++ = '.';
for (i = 8; i < 11; i++)
{
c = dir[i];
if (c == ' ')
{
break;
}
if (_USE_LFN && (nt & NS_EXT) && IsUpper(c))
{
c += 0x20;
}
#if _LFN_UNICODE
if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1]))
{
c = (c << 8) | dir[++i];
}
c = ff_convert(c, 1);
if (!c)
{
c = '?';
}
#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 str by a \0 */
#if _USE_LFN
if (fno->lfname && fno->lfsize)
{
TCHAR *tp = fno->lfname;
WCHAR w, *lfn;
i = 0;
if (dj->sect && dj->lfn_idx != 0xFFFF) /* Get LFN if available */
{
lfn = dj->lfn;
while ((w = *lfn++) != 0) /* Get an LFN char */
{
#if !_LFN_UNICODE
w = ff_convert(w, 0); /* Unicode -> OEM conversion */
if (!w)
{
i = 0; /* Could not convert, no LFN */
break;
}
if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
{
tp[i++] = (TCHAR)(w >> 8);
}
#endif
if (i >= fno->lfsize - 1)
{
i = 0; /* Buffer overflow, no LFN */
break;
}
tp[i++] = (TCHAR)w;
}
}
tp[i] = 0; /* Terminate the LFN str by a \0 */
}
#endif
}
#endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2*/
/*-----------------------------------------------------------------------*/
/* Follow a file path */
/*-----------------------------------------------------------------------*/
static
FRESULT follow_path( /* FR_OK(0): successful, !=0: error code */
DIR *dj, /* 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++;
dj->sclust = 0; /* Strip it and start from the root dir */
}
else /* No heading separator */
{
dj->sclust = dj->fs->cdir; /* Start from the current dir */
}
#else
if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
{
path++;
}
dj->sclust = 0; /* Start from the root dir */
#endif
if ((UINT)*path < ' ') /* Nul path means the start directory itself */
{
res = dir_sdi(dj, 0);
dj->dir = 0;
}
else /* Follow path */
{
for (;;)
{
res = create_name(dj, &path); /* Get a segment */
if (res != FR_OK)
{
break;
}
res = dir_find(dj); /* Find it */
ns = *(dj->fn+NS);
if (res != FR_OK) /* Failed to find the object */
{
if (res != FR_NO_FILE)
{
break; /* Abort if any hard error occurred */
}
/* Object not found */
if (_FS_RPATH && (ns & NS_DOT)) /* If dot entry is not exit */
{
dj->sclust = 0;
dj->dir = 0; /* It is the root dir */
res = FR_OK;
if (!(ns & NS_LAST))
{
continue;
}
}
else /* Could not find the object */
{
if (!(ns & NS_LAST))
{
res = FR_NO_PATH;
}
}
break;
}
if (ns & NS_LAST)
{
break; /* Last segment match. Function completed. */
}
dir = dj->dir; /* There is next segment. Follow the sub directory */
if (!(dir[DIR_Attr] & AM_DIR)) /* Cannot follow because it is a file */
{
res = FR_NO_PATH;
break;
}
dj->sclust = ld_clust(dj->fs, dir);
}
}
return res;
}
/*-----------------------------------------------------------------------*/
/* Load a sector and check if it is an FAT Volume Boot Record */
/*-----------------------------------------------------------------------*/
static
BYTE check_fs( /* 0:FAT-VBR, 1:Any BR but not FAT, 2:Not a BR, 3:Disk error */
FATFS *fs, /* File system object */
DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
)
{
if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK) /* Load boot record */
{
return 3;
}
if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */
{
return 2;
}
if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
{
return 0;
}
if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
{
return 0;
}
return 1;
}
/*-----------------------------------------------------------------------*/
/* Check if the file system object is valid or not */
/*-----------------------------------------------------------------------*/
static
FRESULT chk_mounted( /* FR_OK(0): successful, !=0: any error occurred */
const TCHAR **path, /* Pointer to pointer to the path name (drive number) */
FATFS **rfs, /* Pointer to pointer to the found file system object */
BYTE wmode /* !=0: Check write protection for write access */
)
{
BYTE fmt, b, pi, *tbl;
UINT vol;
DSTATUS stat;
DWORD bsect, fasize, tsect, sysect, nclst, szbfat;
WORD nrsv;
const TCHAR *p = *path;
FATFS *fs;
/* Get logical drive number from the path name */
vol = p[0] - '0'; /* Is there a drive number? */
if (vol <= 9 && p[1] == ':') /* Found a drive number, get and strip it */
{
p += 2;
*path = p; /* Return pointer to the path name */
}
else /* No drive number, use default drive */
{
#if _FS_RPATH
vol = CurrVol; /* Use current drive */
#else
vol = 0; /* Use drive 0 */
#endif
}
/* Check if the file system object is valid or not */
*rfs = 0;
if (vol >= _VOLUMES) /* Is the drive number valid? */
{
return FR_INVALID_DRIVE;
}
fs = FatFs[vol]; /* Get corresponding file system object */
if (!fs)
{
return FR_NOT_ENABLED; /* Is the file system object available? */
}
ENTER_FF(fs); /* Lock volume */
*rfs = fs; /* Return pointer to the corresponding 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 (has not been changed), */
{
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 != 512 /* Get disk sector size (variable sector size cfg only) */
if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK)
{
return FR_DISK_ERR;
}
#endif
/* Search FAT partition on the drive. Supports only generic partitions, FDISK and SFD. */
fmt = check_fs(fs, bsect = 0); /* Load sector 0 and check if it is an FAT-VBR (in SFD) */
if (LD2PT(vol) && !fmt)
{
fmt = 1; /* Force non-SFD if the volume is forced partition */
}
if (fmt == 1) /* Not an FAT-VBR, the physical drive can be partitioned */
{
/* Check the partition listed in the partition table */
pi = LD2PT(vol);
if (pi)
{
pi--;
}
tbl = &fs->win[MBR_Table + pi * SZ_PTE];/* Partition table */
if (tbl[4]) /* Is the partition existing? */
{
bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */
fmt = check_fs(fs, bsect); /* Check the partition */
}
}
if (fmt == 3)
{
return FR_DISK_ERR;
}
if (fmt)
{
return FR_NO_FILESYSTEM; /* No FAT volume is found */
}
/* An FAT volume is found. Following code initializes the file system object */
if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */
{
return FR_NO_FILESYSTEM;
}
fasize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */
if (!fasize)
{
fasize = LD_DWORD(fs->win+BPB_FATSz32);
}
fs->fsize = fasize;
fs->n_fats = b = fs->win[BPB_NumFATs]; /* Number of FAT copies */
if (b != 1 && b != 2)
{
return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */
}
fasize *= b; /* Number of sectors for FAT area */
fs->csize = b = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
if (!b || (b & (b - 1)))
{
return FR_NO_FILESYSTEM; /* (Must be power of 2) */
}
fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Number of root directory entries */
if (fs->n_rootdir % (SS(fs) / SZ_DIR))
{
return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */
}
tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */
if (!tsect)
{
tsect = LD_DWORD(fs->win+BPB_TotSec32);
}
nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); /* Number of reserved sectors */
if (!nrsv)
{
return FR_NO_FILESYSTEM; /* (BPB_RsvdSecCnt must not be 0) */
}
/* Determine the FAT sub type */
sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); /* RSV+FAT+DIR */
if (tsect < sysect)
{
return FR_NO_FILESYSTEM; /* (Invalid volume size) */
}
nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
if (!nclst)
{
return FR_NO_FILESYSTEM; /* (Invalid volume size) */
}
fmt = FS_FAT12;
if (nclst >= MIN_FAT16)
{
fmt = FS_FAT16;
}
if (nclst >= MIN_FAT32)
{
fmt = FS_FAT32;
}
/* Boundaries and Limits */
fs->n_fatent = nclst + 2; /* Number of FAT entries */
fs->volbase = bsect; /* Volume start sector */
fs->fatbase = bsect + nrsv; /* FAT start sector */
fs->database = bsect + sysect; /* Data start sector */
if (fmt == FS_FAT32)
{
if (fs->n_rootdir)
{
return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
}
fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */
szbfat = fs->n_fatent * 4; /* (Required 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) ? /* (Required 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 required) */
{
return FR_NO_FILESYSTEM;
}
#if !_FS_READONLY
/* Initialize cluster allocation information */
fs->free_clust = 0xFFFFFFFF;
fs->last_clust = 0;
/* Get fsinfo if available */
if (fmt == FS_FAT32)
{
fs->fsi_flag = 0;
fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK &&
LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272)
{
fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
}
}
#endif
fs->fs_type = fmt; /* FAT sub-type */
fs->id = ++Fsid; /* File system mount ID */
fs->winsect = 0; /* Invalidate sector cache */
fs->wflag = 0;
#if _FS_RPATH
fs->cdir = 0; /* Current directory (root dir) */
#endif
#if _FS_LOCK /* Clear file lock semaphores */
clear_lock(fs);
#endif
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* Check if the file/dir 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 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(
BYTE vol, /* Logical drive number to be mounted/unmounted */
FATFS *fs /* Pointer to new file system object (NULL for unmount)*/
)
{
FATFS *rfs;
if (vol >= _VOLUMES) /* Check if the drive number is valid */
{
return FR_INVALID_DRIVE;
}
rfs = FatFs[vol]; /* Get current fs object */
if (rfs)
{
#if _FS_LOCK
clear_lock(rfs);
#endif
#if _FS_REENTRANT /* Discard sync object of the current volume */
if (!ff_del_syncobj(rfs->sobj))
{
return FR_INT_ERR;
}
#endif
rfs->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(vol, &fs->sobj))
{
return FR_INT_ERR;
}
#endif
}
FatFs[vol] = fs; /* Register new fs object */
return FR_OK;
}
/*-----------------------------------------------------------------------*/
/* 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 */
#if !_FS_READONLY
mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ));
#else
mode &= FA_READ;
res = chk_mounted(&path, &dj.fs, 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) /* Current dir 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 dir 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->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;
fp->id = dj.fs->id; /* Validate file object */
}
}
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->flag & FA__ERROR) /* Aborted file? */
{
LEAVE_FF(fp->fs, FR_INT_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, (BYTE)cc) != RES_OK)
{
ABORT(fp->fs, FR_DISK_ERR);
}
#if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
#if _FS_TINY
if (fp->fs->wflag && fp->fs->winsect - sect < cc)
{
mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
}
#else
if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
{
mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
}
#endif
#endif
rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
continue;
}
#if !_FS_TINY
if (fp->dsect != sect) /* Load data sector if not in cache */
{
#if !_FS_READONLY
if (fp->flag & FA__DIRTY) /* Write-back dirty sector cache */
{
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
{
ABORT(fp->fs, FR_DISK_ERR);
}
fp->flag &= ~FA__DIRTY;
}
#endif
if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */
{
ABORT(fp->fs, FR_DISK_ERR);
}
}
#endif
fp->dsect = sect;
}
rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
if (rcnt > btr)
{
rcnt = btr;
}
#if _FS_TINY
if (move_window(fp->fs, fp->dsect)) /* Move sector window */
{
ABORT(fp->fs, FR_DISK_ERR);
}
mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
#else
mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
#endif
}
LEAVE_FF(fp->fs, FR_OK);
}
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Write File */
/*-----------------------------------------------------------------------*/
FRESULT f_write(
FIL *fp, /* Pointer to the file object */
const void *buff, /* Pointer to the data to be written */
UINT btw, /* Number of bytes to write */
UINT *bw /* Pointer to number of bytes written */
)
{
FRESULT res;
DWORD clst, sect;
UINT wcnt, cc;
const BYTE *wbuff = (const BYTE *)buff;
BYTE csect;
*bw = 0; /* Clear write byte counter */
res = validate(fp); /* Check validity */
if (res != FR_OK)
{
LEAVE_FF(fp->fs, res);
}
if (fp->flag & FA__ERROR) /* Aborted file? */
{
LEAVE_FF(fp->fs, FR_INT_ERR);
}
if (!(fp->flag & FA_WRITE)) /* Check access mode */
{
LEAVE_FF(fp->fs, FR_DENIED);
}
if ((DWORD)(fp->fsize + btw) < fp->fsize)
{
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, */
{
fp->sclust = 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 _FS_TINY
if (fp->fs->winsect == fp->dsect && sync_window(fp->fs)) /* Write-back sector cache */
{
ABORT(fp->fs, FR_DISK_ERR);
}
#else
if (fp->flag & FA__DIRTY) /* Write-back sector cache */
{
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
{
ABORT(fp->fs, FR_DISK_ERR);
}
fp->flag &= ~FA__DIRTY;
}
#endif
sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
if (!sect)
{
ABORT(fp->fs, FR_INT_ERR);
}
sect += csect;
cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
if (cc) /* Write maximum contiguous sectors directly */
{
if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
{
cc = fp->fs->csize - csect;
}
if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK)
{
ABORT(fp->fs, FR_DISK_ERR);
}
#if _FS_TINY
if (fp->fs->winsect - sect < cc) /* Refill sector cache if it gets invalidated by the direct write */
{
mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
fp->fs->wflag = 0;
}
#else
if (fp->dsect - sect < cc) /* Refill sector cache if it gets invalidated by the direct write */
{
mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
fp->flag &= ~FA__DIRTY;
}
#endif
wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
continue;
}
#if _FS_TINY
if (fp->fptr >= fp->fsize) /* Avoid silly cache filling at growing edge */
{
if (sync_window(fp->fs))
{
ABORT(fp->fs, FR_DISK_ERR);
}
fp->fs->winsect = sect;
}
#else
if (fp->dsect != sect) /* Fill sector cache with file data */
{
if (fp->fptr < fp->fsize &&
disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
{
ABORT(fp->fs, FR_DISK_ERR);
}
}
#endif
fp->dsect = sect;
}
wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
if (wcnt > btw)
{
wcnt = btw;
}
#if _FS_TINY
if (move_window(fp->fs, fp->dsect)) /* Move sector window */
{
ABORT(fp->fs, FR_DISK_ERR);
}
mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
fp->fs->wflag = 1;
#else
mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
fp->flag |= FA__DIRTY;
#endif
}
if (fp->fptr > fp->fsize)
{
fp->fsize = fp->fptr; /* Update file size if needed */
}
fp->flag |= FA__WRITTEN; /* Set file change flag */
LEAVE_FF(fp->fs, FR_OK);
}
/*-----------------------------------------------------------------------*/
/* Synchronize the File Object */
/*-----------------------------------------------------------------------*/
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? */
{
#if !_FS_TINY /* Write-back dirty buffer */
if (fp->flag & FA__DIRTY)
{
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
{
LEAVE_FF(fp->fs, FR_DISK_ERR);
}
fp->flag &= ~FA__DIRTY;
}
#endif
/* Update the directory entry */
res = move_window(fp->fs, fp->dir_sect);
if (res == FR_OK)
{
dir = fp->dir_ptr;
dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */
st_clust(dir, fp->sclust); /* Update start cluster */
tm = get_fattime(); /* Update updated time */
ST_DWORD(dir+DIR_WrtTime, tm);
ST_WORD(dir+DIR_LstAccDate, 0);
fp->flag &= ~FA__WRITTEN;
fp->fs->wflag = 1;
res = sync_fs(fp->fs);
}
}
}
LEAVE_FF(fp->fs, res);
}
#endif /* !_FS_READONLY */
/*-----------------------------------------------------------------------*/
/* Close File */
/*-----------------------------------------------------------------------*/
FRESULT f_close(
FIL *fp /* Pointer to the file object to be closed */
)
{
FRESULT res;
#if _FS_READONLY
res = validate(fp);
{
#if _FS_REENTRANT
FATFS *fs = fp->fs;
#endif
if (res == FR_OK)
{
fp->fs = 0; /* Discard file object */
}
LEAVE_FF(fs, res);
}
#else
res = f_sync(fp); /* Flush cached data */
#if _FS_LOCK
if (res == FR_OK) /* Decrement open counter */
{
#if _FS_REENTRANT
FATFS *fs = fp->fs;;
res = validate(fp);
if (res == FR_OK)
{
res = dec_lock(fp->lockid);
unlock_fs(fs, FR_OK);
}
#else
res = dec_lock(fp->lockid);
#endif
}
#endif
if (res == FR_OK)
{
fp->fs = 0; /* Discard file object */
}
return res;
#endif
}
/*-----------------------------------------------------------------------*/
/* Current Drive/Directory Handlings */
/*-----------------------------------------------------------------------*/
#if _FS_RPATH >= 1
FRESULT f_chdrive(
BYTE drv /* Drive number */
)
{
if (drv >= _VOLUMES)
{
return FR_INVALID_DRIVE;
}
CurrVol = drv;
return FR_OK;
}
FRESULT f_chdir(
const TCHAR *path /* Pointer to the directory path */
)
{
FRESULT res;
DIR dj;
DEF_NAMEBUF;
res = chk_mounted(&path, &dj.fs, 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;
res = chk_mounted((const TCHAR **)&buff, &dj.fs, 0); /* Get current volume */
if (res == FR_OK)
{
INIT_BUF(dj);
i = len; /* Bottom of buffer (dir stack base) */
dj.sclust = dj.fs->cdir; /* Start to follow upper dir from current dir */
while ((ccl = dj.sclust) != 0) /* Repeat while current dir is a sub-dir */
{
res = dir_sdi(&dj, 1); /* Get parent dir */
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 dir */
res = dir_sdi(&dj, 0);
if (res != FR_OK)
{
break;
}
do /* Find the entry links to the child dir */
{
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 dir name and push it to the buffer */
tp = fno.fname;
if (_USE_LFN && *buff)
{
tp = buff;
}
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)
{
*tp++ = '0' + CurrVol; /* Put drive number */
*tp++ = ':';
if (i == len) /* Root-dir */
{
*tp++ = '/';
}
else /* Sub-dir */
{
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->flag & FA__ERROR) /* Check abort flag */
{
LEAVE_FF(fp->fs, FR_INT_ERR);
}
#if _USE_FASTSEEK
if (fp->cltbl) /* Fast seek */
{
DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
if (ofs == CREATE_LINKMAP) /* Create CLMT */
{
tbl = fp->cltbl;
tlen = *tbl++;
ulen = 2; /* Given table size and required table size */
cl = fp->sclust; /* Top of the chain */
if (cl)
{
do
{
/* Get a fragment */
tcl = cl;
ncl = 0;
ulen += 2; /* Top, length and used items */
do
{
pcl = cl;
ncl++;
cl = get_fat(fp->fs, cl);
if (cl <= 1)
{
ABORT(fp->fs, FR_INT_ERR);
}
if (cl == 0xFFFFFFFF)
{
ABORT(fp->fs, FR_DISK_ERR);
}
}
while (cl == pcl + 1);
if (ulen <= tlen) /* Store the length and top of the fragment */
{
*tbl++ = ncl;
*tbl++ = tcl;
}
}
while (cl < fp->fs->n_fatent); /* Repeat until end of chain */
}
*fp->cltbl = ulen; /* Number of items used */
if (ulen <= tlen)
{
*tbl = 0; /* Terminate table */
}
else
{
res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
}
}
else /* Fast seek */
{
if (ofs > fp->fsize) /* Clip offset at the file size */
{
ofs = fp->fsize;
}
fp->fptr = ofs; /* Set file pointer */
if (ofs)
{
fp->clust = clmt_clust(fp, ofs - 1);
dsc = clust2sect(fp->fs, fp->clust);
if (!dsc)
{
ABORT(fp->fs, FR_INT_ERR);
}
dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) /* Refill sector cache if needed */
{
#if !_FS_TINY
#if !_FS_READONLY
if (fp->flag & FA__DIRTY) /* Write-back dirty sector cache */
{
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
{
ABORT(fp->fs, FR_DISK_ERR);
}
fp->flag &= ~FA__DIRTY;
}
#endif
if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */
{
ABORT(fp->fs, FR_DISK_ERR);
}
#endif
fp->dsect = dsc;
}
}
}
}
else
#endif
/* Normal Seek */
{
DWORD clst, bcs, nsect, ifptr;
if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
#if !_FS_READONLY
&& !(fp->flag & FA_WRITE)
#endif
)
{
ofs = fp->fsize;
}
ifptr = fp->fptr;
fp->fptr = nsect = 0;
if (ofs)
{
bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
if (ifptr > 0 &&
(ofs - 1) / bcs >= (ifptr - 1) / bcs) /* When seek to same or following cluster, */
{
fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
ofs -= fp->fptr;
clst = fp->clust;
}
else /* When seek to back cluster, */
{
clst = fp->sclust; /* start from the first cluster */
#if !_FS_READONLY
if (clst == 0) /* If no cluster chain, create a new chain */
{
clst = create_chain(fp->fs, 0);
if (clst == 1)
{
ABORT(fp->fs, FR_INT_ERR);
}
if (clst == 0xFFFFFFFF)
{
ABORT(fp->fs, FR_DISK_ERR);
}
fp->sclust = clst;
}
#endif
fp->clust = clst;
}
if (clst != 0)
{
while (ofs > bcs) /* Cluster following loop */
{
#if !_FS_READONLY
if (fp->flag & FA_WRITE) /* Check if in write mode or not */
{
clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */
if (clst == 0) /* When disk gets full, clip file size */
{
ofs = bcs;
break;
}
}
else
#endif
clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
if (clst == 0xFFFFFFFF)
{
ABORT(fp->fs, FR_DISK_ERR);
}
if (clst <= 1 || clst >= fp->fs->n_fatent)
{
ABORT(fp->fs, FR_INT_ERR);
}
fp->clust = clst;
fp->fptr += bcs;
ofs -= bcs;
}
fp->fptr += ofs;
if (ofs % SS(fp->fs))
{
nsect = clust2sect(fp->fs, clst); /* Current sector */
if (!nsect)
{
ABORT(fp->fs, FR_INT_ERR);
}
nsect += ofs / SS(fp->fs);
}
}
}
if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) /* Fill sector cache if needed */
{
#if !_FS_TINY
#if !_FS_READONLY
if (fp->flag & FA__DIRTY) /* Write-back dirty sector cache */
{
if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
{
ABORT(fp->fs, FR_DISK_ERR);
}
fp->flag &= ~FA__DIRTY;
}
#endif
if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */
{
ABORT(fp->fs, FR_DISK_ERR);
}
#endif
fp->dsect = nsect;
}
#if !_FS_READONLY
if (fp->fptr > fp->fsize) /* Set file change flag if the file size is extended */
{
fp->fsize = fp->fptr;
fp->flag |= FA__WRITTEN;
}
#endif
}
LEAVE_FF(fp->fs, res);
}
#if _FS_MINIMIZE <= 1
/*-----------------------------------------------------------------------*/
/* Create a Directory Object */
/*-----------------------------------------------------------------------*/
FRESULT f_opendir(
DIR *dj, /* Pointer to directory object to create */
const TCHAR *path /* Pointer to the directory path */
)
{
FRESULT res;
FATFS *fs;
DEF_NAMEBUF;
if (!dj)
{
return FR_INVALID_OBJECT;
}
res = chk_mounted(&path, &dj->fs, 0);
fs = dj->fs;
if (res == FR_OK)
{
INIT_BUF(*dj);
res = follow_path(dj, path); /* Follow the path to the directory */
FREE_BUF();
if (res == FR_OK) /* Follow completed */
{
if (dj->dir) /* It is not the root dir */
{
if (dj->dir[DIR_Attr] & AM_DIR) /* The object is a directory */
{
dj->sclust = ld_clust(fs, dj->dir);
}
else /* The object is not a directory */
{
res = FR_NO_PATH;
}
}
if (res == FR_OK)
{
dj->id = fs->id;
res = dir_sdi(dj, 0); /* Rewind dir */
}
}
if (res == FR_NO_FILE)
{
res = FR_NO_PATH;
}
if (res != FR_OK)
{
dj->fs = 0; /* Invalidate the dir object if function faild */
}
}
else
{
dj->fs = 0;
}
LEAVE_FF(fs, res);
}
/*-----------------------------------------------------------------------*/
/* Read Directory Entry in Sequence */
/*-----------------------------------------------------------------------*/
FRESULT f_readdir(
DIR *dj, /* Pointer to the open directory object */
FILINFO *fno /* Pointer to file information to return */
)
{
FRESULT res;
DEF_NAMEBUF;
res = validate(dj); /* Check validity of the object */
if (res == FR_OK)
{
if (!fno)
{
res = dir_sdi(dj, 0); /* Rewind the directory object */
}
else
{
INIT_BUF(*dj);
res = dir_read(dj, 0); /* Read an item */
if (res == FR_NO_FILE) /* Reached end of dir */
{
dj->sect = 0;
res = FR_OK;
}
if (res == FR_OK) /* A valid entry is found */
{
get_fileinfo(dj, fno); /* Get the object information */
res = dir_next(dj, 0); /* Increment index for next */
if (res == FR_NO_FILE)
{
dj->sect = 0;
res = FR_OK;
}
}
FREE_BUF();
}
}
LEAVE_FF(dj->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;
res = chk_mounted(&path, &dj.fs, 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 */
{
get_fileinfo(&dj, fno);
}
else /* It is root dir */
{
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 drive number */
res = chk_mounted(&path, fatfs, 0);
fs = *fatfs;
if (res == FR_OK)
{
/* If free_clust is valid, return it without full cluster scan */
if (fs->free_clust <= fs->n_fatent - 2)
{
*nclst = fs->free_clust;
}
else
{
/* Get number of free clusters */
fat = fs->fs_type;
n = 0;
if (fat == FS_FAT12)
{
clst = 2;
do
{
stat = get_fat(fs, clst);
if (stat == 0xFFFFFFFF)
{
res = FR_DISK_ERR;
break;
}
if (stat == 1)
{
res = FR_INT_ERR;
break;
}
if (stat == 0)
{
n++;
}
}
while (++clst < fs->n_fatent);
}
else
{
clst = fs->n_fatent;
sect = fs->fatbase;
i = 0;
p = 0;
do
{
if (!i)
{
res = move_window(fs, sect++);
if (res != FR_OK)
{
break;
}
p = fs->win;
i = SS(fs);
}
if (fat == FS_FAT16)
{
if (LD_WORD(p) == 0)
{
n++;
}
p += 2;
i -= 2;
}
else
{
if ((LD_DWORD(p) & 0x0FFFFFFF) == 0)
{
n++;
}
p += 4;
i -= 4;
}
}
while (--clst);
}
fs->free_clust = n;
if (fat == FS_FAT32)
{
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->flag & FA__ERROR) /* Check abort flag */
{
res = FR_INT_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 (res != FR_OK)
{
fp->flag |= FA__ERROR;
}
}
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;
res = chk_mounted(&path, &dj.fs, 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-dir 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 dir */
#if _FS_RPATH
|| dclst == dj.fs->cdir /* Current dir */
#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;
res = chk_mounted(&path, &dj.fs, 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;
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[33] = '.';
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;
res = chk_mounted(&path, &dj.fs, 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;
res = chk_mounted(&path, &dj.fs, 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 old name */
const TCHAR *path_new /* Pointer to the new name */
)
{
FRESULT res;
DIR djo, djn;
BYTE buf[21], *dir;
DWORD dw;
DEF_NAMEBUF;
res = chk_mounted(&path_old, &djo.fs, 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 for name */
mem_cpy(&djn, &djo, sizeof(DIR)); /* Check new object */
res = follow_path(&djn, path_new);
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 for 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+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 *sn /* Pointer to a variable to return the volume serial number */
)
{
FRESULT res;
DIR dj;
UINT i, j;
/* Get logical drive */
res = chk_mounted(&path, &dj.fs, 0);
/* Get volume label */
if (res == FR_OK && label)
{
dj.sclust = 0; /* Open root dir */
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 _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);
}
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 && sn)
{
res = move_window(dj.fs, dj.fs->volbase);
if (res == FR_OK)
{
i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID;
*sn = LD_DWORD(&dj.fs->win[i]);
}
}
LEAVE_FF(dj.fs, res);
}
#if !_FS_READONLY
/*-----------------------------------------------------------------------*/
/* Set volume label */
/*-----------------------------------------------------------------------*/
FRESULT f_setlabel(
const TCHAR *label /* Pointer to the volume label to set */
)
{
FRESULT res;
DIR dj;
BYTE vn[11];
UINT i, j, sl;
WCHAR w;
DWORD tm;
/* Get logical drive */
res = chk_mounted(&label, &dj.fs, 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 _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 chars */
}
#ifdef _EXCVT
if (w >= 0x80)
{
w = ExCvt[w - 0x80]; /* To upper extended chars (SBCS cfg) */
}
#else
if (!_DF1S && w >= 0x80)
{
w = 0; /* Reject extended chars (ASCII cfg) */
}
#endif
#endif
#endif
if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid chars 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 dir */
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->flag & FA__ERROR) /* Check error flag */
{
LEAVE_FF(fp->fs, FR_INT_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[(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 dir entries for FAT12/16 */
#define N_FATS 1 /* Number of FAT copies (1 or 2) */
FRESULT f_mkfs(
BYTE vol, /* Logical drive number */
BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */
UINT au /* Allocation unit size [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};
BYTE fmt, md, sys, *tbl, pdrv, part;
DWORD n_clst, vs, n, wsect;
UINT i;
DWORD b_vol, b_fat, b_dir, b_data; /* LBA */
DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */
FATFS *fs;
DSTATUS stat;
/* Check mounted drive and clear work area */
if (vol >= _VOLUMES)
{
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 != 512 /* Get disk sector size */
if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS)
{
return FR_DISK_ERR;
}
#endif
if (_MULTI_PARTITION && part)
{
/* Get partition information from partition table in the MBR */
if (disk_read(pdrv, fs->win, 0, 1) != RES_OK)
{
return FR_DISK_ERR;
}
if (LD_WORD(fs->win+BS_55AA) != 0xAA55)
{
return FR_MKFS_ABORTED;
}
tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
if (!tbl[4])
{
return FR_MKFS_ABORTED; /* No partition? */
}
b_vol = LD_DWORD(tbl+8); /* Volume start sector */
n_vol = LD_DWORD(tbl+12); /* Volume size */
}
else
{
/* Create a partition in this function */
if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128)
{
return FR_DISK_ERR;
}
b_vol = (sfd) ? 0 : 63; /* Volume start sector */
n_vol -= b_vol; /* Volume size */
}
if (!au) /* AU 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;
}
switch (fmt) /* Determine system ID for partition table */
{
case FS_FAT12:
sys = 0x01;
break;
case FS_FAT16:
sys = (n_vol < 0x10000) ? 0x04 : 0x06;
break;
default:
sys = 0x0C;
}
if (_MULTI_PARTITION && part)
{
/* Update system ID in the partition table */
tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
tbl[4] = sys;
if (disk_write(pdrv, fs->win, 0, 1) != RES_OK)
{
return FR_DISK_ERR;
}
md = 0xF8;
}
else
{
if (sfd) /* No partition table (SFD) */
{
md = 0xF0;
}
else /* Create partition table (FDISK) */
{
mem_set(fs->win, 0, SS(fs));
tbl = fs->win+MBR_Table; /* Create partition table for single partition in the drive */
tbl[1] = 1; /* Partition start head */
tbl[2] = 1; /* Partition start sector */
tbl[3] = 0; /* Partition start cylinder */
tbl[4] = sys; /* System type */
tbl[5] = 254; /* Partition end head */
n = (b_vol + n_vol) / 63 / 255;
tbl[6] = (BYTE)((n >> 2) | 63); /* Partition end sector */
tbl[7] = (BYTE)n; /* End cylinder */
ST_DWORD(tbl+8, 63); /* Partition start in LBA */
ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */
ST_WORD(fs->win+BS_55AA, 0xAA55); /* MBR signature */
if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR sector */
{
return FR_DISK_ERR;
}
md = 0xF8;
}
}
/* Create BPB in the VBR */
tbl = fs->win; /* Clear sector */
mem_set(tbl, 0, SS(fs));
mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
i = SS(fs); /* Sector size */
ST_WORD(tbl+BPB_BytsPerSec, i);
tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */
ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of rootdir entries */
ST_WORD(tbl+BPB_RootEntCnt, i);
if (n_vol < 0x10000) /* Number of total sectors */
{
ST_WORD(tbl+BPB_TotSec16, n_vol);
}
else
{
ST_DWORD(tbl+BPB_TotSec32, n_vol);
}
tbl[BPB_Media] = md; /* Media descriptor */
ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */
ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */
ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */
n = get_fattime(); /* Use current time as VSN */
if (fmt == FS_FAT32)
{
ST_DWORD(tbl+BS_VolID32, n); /* VSN */
ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */
ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */
ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (VBR+1) */
ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */
tbl[BS_DrvNum32] = 0x80; /* Drive number */
tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
mem_cpy(tbl+BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
}
else
{
ST_DWORD(tbl+BS_VolID, n); /* VSN */
ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */
tbl[BS_DrvNum] = 0x80; /* Drive number */
tbl[BS_BootSig] = 0x29; /* Extended boot signature */
mem_cpy(tbl+BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
}
ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */
if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */
{
return FR_DISK_ERR;
}
if (fmt == FS_FAT32) /* Write backup VBR if needed (VBR+6) */
{
disk_write(pdrv, tbl, b_vol + 6, 1);
}
/* Initialize FAT area */
wsect = b_fat;
for (i = 0; i < N_FATS; i++) /* Initialize each FAT copy */
{
mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
n = md; /* Media descriptor byte */
if (fmt != FS_FAT32)
{
n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */
}
else
{
n |= 0xFFFFFF00;
ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */
ST_DWORD(tbl+4, 0xFFFFFFFF);
ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */
}
if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
{
return FR_DISK_ERR;
}
mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */
for (n = 1; n < n_fat; n++) /* This loop may take a time on FAT32 volume due to many single sector writes */
{
if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
{
return FR_DISK_ERR;
}
}
}
/* Initialize root directory */
i = (fmt == FS_FAT32) ? au : n_dir;
do
{
if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
{
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] <= 100) ? (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 bytes until buffer gets filled */
{
f_read(fp, s, 1, &rc);
if (rc != 1)
{
break; /* Break on EOF or error */
}
c = s[0];
#if _LFN_UNICODE /* Read a character in UTF-8 encoding */
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 = '?';
}
}
}
#endif
#if _USE_STRFUNC >= 2
if (c == '\r')
{
continue; /* Strip '\r' */
}
#endif
*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 */
/*-----------------------------------------------------------------------*/
int f_putc(
TCHAR c, /* A character to be output */
FIL *fp /* Pointer to the file object */
)
{
UINT bw, btw;
BYTE s[3];
#if _USE_STRFUNC >= 2
if (c == '\n')
{
f_putc('\r', fp); /* LF -> CRLF conversion */
}
#endif
#if _LFN_UNICODE /* Write the character in UTF-8 encoding */
if (c < 0x80) /* 7-bit */
{
s[0] = (BYTE)c;
btw = 1;
}
else
{
if (c < 0x800) /* 11-bit */
{
s[0] = (BYTE)(0xC0 | (c >> 6));
s[1] = (BYTE)(0x80 | (c & 0x3F));
btw = 2;
}
else /* 16-bit */
{
s[0] = (BYTE)(0xE0 | (c >> 12));
s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F));
s[2] = (BYTE)(0x80 | (c & 0x3F));
btw = 3;
}
}
#else /* Write the character without conversion */
s[0] = (BYTE)c;
btw = 1;
#endif
f_write(fp, s, btw, &bw); /* Write the char to the file */
return (bw == btw) ? 1 : EOF; /* Return the result */
}
/*-----------------------------------------------------------------------*/
/* 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 */
)
{
int n;
for (n = 0; *str; str++, n++)
{
if (f_putc(*str, fp) == EOF)
{
return EOF;
}
}
return n;
}
/*-----------------------------------------------------------------------*/
/* Put a formatted string to the file */
/*-----------------------------------------------------------------------*/
int f_printf(
FIL *fp, /* Pointer to the file object */
const TCHAR *str, /* Pointer to the format string */
... /* Optional arguments... */
)
{
va_list arp;
BYTE f, r;
UINT i, j, w;
ULONG v;
TCHAR c, d, s[16], *p;
int res, chc, cc;
va_start(arp, str);
for (cc = res = 0; cc != EOF; res += cc)
{
c = *str++;
if (c == 0)
{
break; /* End of string */
}
if (c != '%') /* Non escape character */
{
cc = f_putc(c, fp);
if (cc != EOF)
{
cc = 1;
}
continue;
}
w = f = 0;
c = *str++;
if (c == '0') /* Flag: '0' padding */
{
f = 1;
c = *str++;
}
else
{
if (c == '-') /* Flag: left justified */
{
f = 2;
c = *str++;
}
}
while (IsDigit(c)) /* Precision */
{
w = w * 10 + c - '0';
c = *str++;
}
if (c == 'l' || c == 'L') /* Prefix: Size is long int */
{
f |= 4;
c = *str++;
}
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++) ;
chc = 0;
if (!(f & 2))
{
while (j++ < w)
{
chc += (cc = f_putc(' ', fp));
}
}
chc += (cc = f_puts(p, fp));
while (j++ < w)
{
chc += (cc = f_putc(' ', fp));
}
if (cc != EOF)
{
cc = chc;
}
continue;
case 'C' : /* Character */
cc = f_putc((TCHAR)va_arg(arp, int), fp);
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) */
cc = f_putc(c, fp);
continue;
}
/* Get an argument and put it in numeral */
v = (f & 4) ? (ULONG)va_arg(arp, long) : ((d == 'D') ? (ULONG)(long)va_arg(arp, int) : (ULONG)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' : ' ';
chc = 0;
while (!(f & 2) && j++ < w)
{
chc += (cc = f_putc(d, fp));
}
do
{
chc += (cc = f_putc(s[--i], fp));
}
while (i);
while (j++ < w)
{
chc += (cc = f_putc(' ', fp));
}
if (cc != EOF)
{
cc = chc;
}
}
va_end(arp);
return (cc == EOF) ? cc : res;
}
#endif /* !_FS_READONLY */
#endif /* _USE_STRFUNC */
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