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view ff.c @ 45:425af63d584d
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| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Sat, 23 Jun 2012 23:37:36 +0800 |
| parents | 888be1b234b6 |
| children |
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/*----------------------------------------------------------------------------/ / FatFs - FAT file system module R0.09 (C)ChaN, 2011 /-----------------------------------------------------------------------------/ / 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) 2011, 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 names. / / Sep 06,'11 R0.09 f_mkfs() supports multiple partition to finish the multiple partition feature. / Added f_fdisk(). (_MULTI_PARTITION = 2) /---------------------------------------------------------------------------*/ #include "ff.h" /* FatFs configurations and declarations */ #include "diskio.h" /* Declarations of low level disk I/O functions */ /*-------------------------------------------------------------------------- Module Private Definitions ---------------------------------------------------------------------------*/ #if _FATFS != 6502 /* 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 shareing feature */ #if _FS_SHARE #if _FS_READONLY #error _FS_SHARE 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 /* Misc definitions */ #define LD_CLUST(dir) (((DWORD)LD_WORD(dir+DIR_FstClusHI)<<16) | LD_WORD(dir+DIR_FstClusLO)) #define ST_CLUST(dir,cl) {ST_WORD(dir+DIR_FstClusLO, cl); ST_WORD(dir+DIR_FstClusHI, (DWORD)cl>>16);} /* 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 sectot (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_CrtTime 14 /* Created time (2) */ #define DIR_CrtDate 16 /* Created 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 enrty mark in DIR_Name[0] */ #define NDDE 0x05 /* Replacement of a 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_SHARE static FILESEM Files[_FS_SHARE]; /* 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 /*-------------------------------------------------------------------------- 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 (res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_INVALID_OBJECT && res != FR_TIMEOUT) { ff_rel_grant(fs->sobj); } } #endif /*-----------------------------------------------------------------------*/ /* File shareing control functions */ /*-----------------------------------------------------------------------*/ #if _FS_SHARE 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_SHARE; 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_SHARE) /* 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_SHARE && Files[i].fs; i++) ; return (i == _FS_SHARE) ? 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_SHARE; i++) { /* Find the file */ if (Files[i].fs == dj->fs && Files[i].clu == dj->sclust && Files[i].idx == dj->index) break; } if (i == _FS_SHARE) { /* Not opened. Register it as new. */ for (i = 0; i < _FS_SHARE && Files[i].fs; i++) ; if (i == _FS_SHARE) 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_SHARE) { 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_SHARE; i++) { if (Files[i].fs == fs) Files[i].fs = 0; } } #endif /*-----------------------------------------------------------------------*/ /* Change window offset */ /*-----------------------------------------------------------------------*/ static FRESULT move_window ( FATFS *fs, /* File system object */ DWORD sector /* Sector number to make appearance in the fs->win[] */ ) /* Move to zero only writes back dirty window */ { DWORD wsect; wsect = fs->winsect; if (wsect != sector) { /* Changed current window */ #if !_FS_READONLY if (fs->wflag) { /* Write back dirty window if needed */ if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) return FR_DISK_ERR; fs->wflag = 0; if (wsect < (fs->fatbase + fs->fsize)) { /* In FAT area */ BYTE nf; for (nf = fs->n_fats; nf > 1; nf--) { /* Reflect the change to all FAT copies */ wsect += fs->fsize; disk_write(fs->drv, fs->win, wsect, 1); } } } #endif if (sector) { if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) return FR_DISK_ERR; fs->winsect = sector; } } return FR_OK; } /*-----------------------------------------------------------------------*/ /* Clean-up cached data */ /*-----------------------------------------------------------------------*/ #if !_FS_READONLY static FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */ FATFS *fs /* File system object */ ) { FRESULT res; res = move_window(fs, 0); 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) /* Chack 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 = 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, resion[2]; #endif if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ res = FR_INT_ERR; } else { res = FR_OK; while (clst < fs->n_fatent) { /* Not a last link? */ nxt = get_fat(fs, clst); /* Get cluster status */ if (nxt == 0) break; /* Empty cluster? */ if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */ if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */ res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */ if (res != FR_OK) break; if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */ fs->free_clust++; fs->fsi_flag = 1; } #if _USE_ERASE if (ecl + 1 == nxt) { /* Next cluster is contiguous */ ecl = nxt; } else { /* End of contiguous clusters */ resion[0] = clust2sect(fs, scl); /* Start sector */ resion[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, resion); /* 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 /* Directory index number */ ) { 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 index next */ /*-----------------------------------------------------------------------*/ static FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */ DIR *dj, /* Pointer to 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 (move_window(dj->fs, 0)) 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 (move_window(dj->fs, 0)) 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; } /*-----------------------------------------------------------------------*/ /* 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; break; } /* Reached to end of table */ #if _USE_LFN /* LFN configuration */ a = dir[DIR_Attr] & AM_MASK; if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ ord = 0xFF; } 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 static FRESULT dir_read ( DIR *dj /* Pointer to the directory object that pointing the entry to be read */ ) { FRESULT res; BYTE c, *dir; #if _USE_LFN BYTE a, 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; break; } /* Reached to end of table */ #if _USE_LFN /* LFN configuration */ a = dir[DIR_Attr] & AM_MASK; if (c == DDE || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* 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 != '.') && !(dir[DIR_Attr] & AM_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 /*-----------------------------------------------------------------------*/ /* 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; BYTE c, *dir; #if _USE_LFN /* LFN configuration */ WORD n, ne, is; 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, reserve an SFN + LFN entries. */ for (ne = 0; lfn[ne]; ne++) ; ne = (ne + 25) / 13; } else { /* Otherwise reserve only an SFN entry. */ ne = 1; } /* Reserve contiguous entries */ res = dir_sdi(dj, 0); if (res != FR_OK) return res; n = is = 0; do { res = move_window(dj->fs, dj->sect); if (res != FR_OK) break; c = *dj->dir; /* Check the entry status */ if (c == DDE || c == 0) { /* Is it a blank entry? */ if (n == 0) is = dj->index; /* First index of the contiguous entry */ if (++n == ne) break; /* A contiguous entry that required count is found */ } else { n = 0; /* Not a blank entry. Restart to search */ } res = dir_next(dj, 1); /* Next entry with table stretch */ } while (res == FR_OK); if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */ res = dir_sdi(dj, is); if (res == FR_OK) { sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */ ne--; 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_sdi(dj, 0); if (res == FR_OK) { do { /* Find a blank entry for the SFN */ res = move_window(dj->fs, dj->sect); if (res != FR_OK) break; c = *dj->dir; if (c == DDE || c == 0) break; /* Is it a blank entry? */ res = dir_next(dj, 1); /* Next entry with table stretch */ } while (res == FR_OK); } #endif if (res == FR_OK) { /* Initialize the SFN entry */ res = move_window(dj->fs, dj->sect); if (res == FR_OK) { dir = dj->dir; mem_set(dir, 0, SZ_DIR); /* Clean the entry */ mem_cpy(dir, dj->fn, 11); /* Put SFN */ #if _USE_LFN 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 */ ) { #ifdef _EXCVT static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */ #endif #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]; /* Upper conversion (SBCS) */ #else #if !_DF1S /* ASCII only cfg */ return FR_INVALID_NAME; #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 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; break; } /* Could not convert, no LFN */ 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; break; } /* Buffer overflow, no LFN */ tp[i++] = (TCHAR)w; } } tp[i] = 0; /* Terminate the LFN str by a \0 */ } #endif } #endif /* _FS_MINIMIZE <= 1 */ /*-----------------------------------------------------------------------*/ /* 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 occured */ /* 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(dir); } } return res; } /*-----------------------------------------------------------------------*/ /* Load a sector and check if it is an FAT Volume Boot Record */ /*-----------------------------------------------------------------------*/ static BYTE check_fs ( /* 0:FAT-VBR, 1:Valid 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 chk_wp /* !=0: Check media 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 is given */ #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 */ if (vol >= _VOLUMES) /* Is the drive number valid? */ return FR_INVALID_DRIVE; *rfs = fs = FatFs[vol]; /* Return pointer to the corresponding file system object */ if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */ ENTER_FF(fs); /* Lock file system */ if (fs->fs_type) { /* If the logical drive 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 && chk_wp && (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 low level disk I/O layer */ if (stat & STA_NOINIT) /* Check if the initialization succeeded */ return FR_NOT_READY; /* Failed to initialize due to no media or hard error */ if (!_FS_READONLY && chk_wp && (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 partitionings, 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->database = bsect + sysect; /* Data start sector */ fs->fatbase = bsect + nrsv; /* FAT 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_SHARE /* 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 */ FATFS *fs, /* Pointer to the file system object */ WORD id /* Member id of the target object to be checked */ ) { if (!fs || !fs->fs_type || fs->id != id) return FR_INVALID_OBJECT; ENTER_FF(fs); /* Lock file system */ if (disk_status(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_SHARE 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; 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 INIT_BUF(dj); if (res == FR_OK) 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_SHARE 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_SHARE 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(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_SHARE 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 */ 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(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 = buff; *br = 0; /* Initialize byte counter */ res = validate(fp->fs, fp->id); /* 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) - (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 = buff; BYTE csect; *bw = 0; /* Initialize byte counter */ res = validate(fp->fs, fp->id); /* 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 && move_window(fp->fs, 0)) /* 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 (move_window(fp->fs, 0)) 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) - (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 tim; BYTE *dir; res = validate(fp->fs, fp->id); /* 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 */ tim = get_fattime(); /* Update updated time */ ST_DWORD(dir+DIR_WrtTime, tim); fp->flag &= ~FA__WRITTEN; fp->fs->wflag = 1; res = sync(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 FATFS *fs = fp->fs; res = validate(fs, fp->id); if (res == FR_OK) fp->fs = 0; /* Discard file object */ LEAVE_FF(fs, res); #else res = f_sync(fp); /* Flush cached data */ #if _FS_SHARE if (res == FR_OK) { /* Decrement open counter */ #if _FS_REENTRANT res = validate(fp->fs, fp->id); if (res == FR_OK) { res = dec_lock(fp->lockid); unlock_fs(fp->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.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 *path, /* Pointer to the directory path */ UINT sz_path /* Size of path */ ) { FRESULT res; DIR dj; UINT i, n; DWORD ccl; TCHAR *tp; FILINFO fno; DEF_NAMEBUF; *path = 0; res = chk_mounted((const TCHAR**)&path, &dj.fs, 0); /* Get current volume */ if (res == FR_OK) { INIT_BUF(dj); i = sz_path; /* 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); if (res != FR_OK) break; dj.sclust = LD_CLUST(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); if (res != FR_OK) break; if (ccl == LD_CLUST(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 = path; fno.lfsize = i; #endif get_fileinfo(&dj, &fno); /* Get the dir name and push it to the buffer */ tp = fno.fname; if (_USE_LFN && *path) tp = path; for (n = 0; tp[n]; n++) ; if (i < n + 3) { res = FR_NOT_ENOUGH_CORE; break; } while (n) path[--i] = tp[--n]; path[--i] = '/'; } tp = path; if (res == FR_OK) { *tp++ = '0' + CurrVol; /* Put drive number */ *tp++ = ':'; if (i == sz_path) { /* Root-dir */ *tp++ = '/'; } else { /* Sub-dir */ do /* Add stacked path str */ *tp++ = path[i++]; while (i < sz_path); } } *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->fs, fp->id); /* 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 Directroy Object */ /*-----------------------------------------------------------------------*/ FRESULT f_opendir ( DIR *dj, /* Pointer to directory object to create */ const TCHAR *path /* Pointer to the directory path */ ) { FRESULT res; DEF_NAMEBUF; res = chk_mounted(&path, &dj->fs, 0); 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(dj->dir); } else { /* The object is not a directory */ res = FR_NO_PATH; } } if (res == FR_OK) { dj->id = dj->fs->id; res = dir_sdi(dj, 0); /* Rewind dir */ } } if (res == FR_NO_FILE) res = FR_NO_PATH; } LEAVE_FF(dj->fs, res); } /*-----------------------------------------------------------------------*/ /* Read Directory Entry in Sequense */ /*-----------------------------------------------------------------------*/ 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->fs, dj->id); /* 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); /* Read an directory 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, /* Pointer to the logical drive number (root dir) */ DWORD *nclst, /* Pointer to the variable to return number of free clusters */ FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */ ) { FRESULT res; DWORD n, clst, sect, stat; UINT i; BYTE fat, *p; /* Get drive number */ res = chk_mounted(&path, fatfs, 0); if (res == FR_OK) { /* If free_clust is valid, return it without full cluster scan */ if ((*fatfs)->free_clust <= (*fatfs)->n_fatent - 2) { *nclst = (*fatfs)->free_clust; } else { /* Get number of free clusters */ fat = (*fatfs)->fs_type; n = 0; if (fat == FS_FAT12) { clst = 2; do { stat = get_fat(*fatfs, clst); if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } if (stat == 1) { res = FR_INT_ERR; break; } if (stat == 0) n++; } while (++clst < (*fatfs)->n_fatent); } else { clst = (*fatfs)->n_fatent; sect = (*fatfs)->fatbase; i = 0; p = 0; do { if (!i) { res = move_window(*fatfs, sect++); if (res != FR_OK) break; p = (*fatfs)->win; i = SS(*fatfs); } 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); } (*fatfs)->free_clust = n; if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1; *nclst = n; } } LEAVE_FF(*fatfs, res); } /*-----------------------------------------------------------------------*/ /* Truncate File */ /*-----------------------------------------------------------------------*/ FRESULT f_truncate ( FIL *fp /* Pointer to the file object */ ) { FRESULT res; DWORD ncl; res = validate(fp->fs, fp->id); /* 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_SHARE 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(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); if (res == FR_OK /* Not empty dir */ #if _FS_RPATH || dclst == sdj.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(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, tim = 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 = move_window(dj.fs, 0); 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, ' ', 8+3); /* Create "." entry */ dir[DIR_Name] = '.'; dir[DIR_Attr] = AM_DIR; ST_DWORD(dir+DIR_WrtTime, tim); 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 = move_window(dj.fs, 0); 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, tim); /* Created time */ ST_CLUST(dir, dcl); /* Table start cluster */ dj.fs->wflag = 1; res = sync(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(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(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_SHARE 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 or error can cause 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(djn.fs, LD_CLUST(dir)); if (!dw) { res = FR_INT_ERR; } else { res = move_window(djn.fs, dw); dir = djn.fs->win+SZ_DIR; /* .. entry */ if (res == FR_OK && dir[1] == '.') { dw = (djn.fs->fs_type == FS_FAT32 && djn.sclust == djn.fs->dirbase) ? 0 : djn.sclust; ST_CLUST(dir, dw); djn.fs->wflag = 1; } } } if (res == FR_OK) { res = dir_remove(&djo); /* Remove old entry */ if (res == FR_OK) res = sync(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 */ /*-----------------------------------------------------------------------*/ /* 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 btr, /* 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; /* Initialize byte counter */ res = validate(fp->fs, fp->id); /* 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 (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ for ( ; btr && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */ fp->fptr += rcnt, *bf += rcnt, btr -= 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 > btr) rcnt = btr; 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 drv, /* 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 (drv >= _VOLUMES) return FR_INVALID_DRIVE; if (sfd > 1) return FR_INVALID_PARAMETER; if (au & (au - 1)) return FR_INVALID_PARAMETER; fs = FatFs[drv]; if (!fs) return FR_NOT_ENABLED; fs->fs_type = 0; pdrv = LD2PD(drv); /* Physical drive */ part = LD2PT(drv); /* 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 syb-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 patition table (SFD) */ md = 0xF0; } else { /* Create partition table (FDISK) */ mem_set(fs->win, 0, SS(fs)); tbl = fs->win+MBR_Table; /* Create partiton 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); /* Partiiton 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 == 2 /*-----------------------------------------------------------------------*/ /* 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 == 2 */ #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* fil /* 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(fil, 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 sequense */ f_read(fil, s, 1, &rc); if (rc != 1) break; c = ((c & 0x1F) << 6) | (s[0] & 0x3F); if (c < 0x80) c = '?'; } else { if (c < 0xF0) { /* Three-byte sequense */ f_read(fil, 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 sequense */ 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* fil /* Pointer to the file object */ ) { UINT bw, btw; BYTE s[3]; #if _USE_STRFUNC >= 2 if (c == '\n') f_putc ('\r', fil); /* 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(fil, 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* fil /* Pointer to the file object */ ) { int n; for (n = 0; *str; str++, n++) { if (f_putc(*str, fil) == EOF) return EOF; } return n; } /*-----------------------------------------------------------------------*/ /* Put a formatted string to the file */ /*-----------------------------------------------------------------------*/ int f_printf ( FIL* fil, /* 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, fil); 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(' ', fil)); } chc += (cc = f_puts(p, fil)); while (j++ < w) chc += (cc = f_putc(' ', fil)); if (cc != EOF) cc = chc; continue; case 'C' : /* Character */ cc = f_putc((TCHAR)va_arg(arp, int), fil); 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 (passthrough) */ cc = f_putc(c, fil); 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' : ' '; res = 0; while (!(f & 2) && j++ < w) res += (cc = f_putc(d, fil)); do res += (cc = f_putc(s[--i], fil)); while(i); while (j++ < w) res += (cc = f_putc(' ', fil)); if (cc != EOF) cc = res; } va_end(arp); return (cc == EOF) ? cc : res; } #endif /* !_FS_READONLY */ #endif /* _USE_STRFUNC */