this library has few changes from the original library, for effects of this work.
FATFileSystem/ChaN/ff.cpp
- Committer:
- FannyCalle
- Date:
- 2018-05-21
- Revision:
- 0:8214896432e0
File content as of revision 0:8214896432e0:
/*----------------------------------------------------------------------------/ / FatFs - FAT file system module R0.11a (C)ChaN, 2015 / /-----------------------------------------------------------------------------/ / FatFs module is a free software that opened under license policy of / following conditions. / / Copyright (C) 2015, ChaN, all right reserved. / / 1. Redistributions of source code must retain the above copyright notice, / this condition and the following disclaimer. / / This software is provided by the copyright holder and contributors "AS IS" / and any warranties related to this software are DISCLAIMED. / The copyright owner or contributors be NOT LIABLE for any damages caused / by use of this software. /----------------------------------------------------------------------------*/ #include "ff.h" /* Declarations of FatFs API */ #include "diskio.h" /* Declarations of disk I/O functions */ /*-------------------------------------------------------------------------- Module Private Definitions ---------------------------------------------------------------------------*/ #if _FATFS != 64180 /* Revision ID */ #error Wrong include file (ff.h). #endif /* Reentrancy related */ #if _FS_REENTRANT #if _USE_LFN == 1 #error Static LFN work area cannot be used at thread-safe configuration #endif #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; } #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } #else #define ENTER_FF(fs) #define LEAVE_FF(fs, res) return res #endif #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); } /* Definitions of sector size */ #if (_MAX_SS < _MIN_SS) || (_MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096) || (_MIN_SS != 512 && _MIN_SS != 1024 && _MIN_SS != 2048 && _MIN_SS != 4096) #error Wrong sector size configuration #endif #if _MAX_SS == _MIN_SS #define SS(fs) ((UINT)_MAX_SS) /* Fixed sector size */ #else #define SS(fs) ((fs)->ssize) /* Variable sector size */ #endif /* Timestamp feature */ #if _FS_NORTC == 1 #if _NORTC_YEAR < 1980 || _NORTC_YEAR > 2107 || _NORTC_MON < 1 || _NORTC_MON > 12 || _NORTC_MDAY < 1 || _NORTC_MDAY > 31 #error Invalid _FS_NORTC settings #endif #define GET_FATTIME() ((DWORD)(_NORTC_YEAR - 1980) << 25 | (DWORD)_NORTC_MON << 21 | (DWORD)_NORTC_MDAY << 16) #else #define GET_FATTIME() get_fattime() #endif /* File access control feature */ #if _FS_LOCK #if _FS_READONLY #error _FS_LOCK must be 0 at read-only configuration #endif typedef struct { FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */ DWORD clu; /* Object ID 2, directory (0:root) */ WORD idx; /* Object ID 3, directory index */ WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */ } FILESEM; #endif /* DBCS code ranges and SBCS upper conversion tables */ #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. */ #define _DF1S 0 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,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,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 == 720 /* Arabic */ #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 == 737 /* Greek */ #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,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 771 /* KBL */ #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,0xDC,0xDE,0xDE, \ 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF} #elif _CODE_PAGE == 775 /* Baltic */ #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 /* Latin 1 */ #define _DF1S 0 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \ 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \ 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \ 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 852 /* Latin 2 */ #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,0xAC, \ 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 */ #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 */ #define _DF1S 0 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,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,0xAD,0xAE,0xAF, \ 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \ 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} #elif _CODE_PAGE == 860 /* Portuguese */ #define _DF1S 0 #define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \ 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,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 == 861 /* Icelandic */ #define _DF1S 0 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \ 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,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 == 862 /* Hebrew */ #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,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 == 863 /* Canadian-French */ #define _DF1S 0 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \ 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \ 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,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 == 864 /* Arabic */ #define _DF1S 0 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,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,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 == 865 /* Nordic */ #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,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 == 866 /* Russian */ #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 == 869 /* Greek 2 */ #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,0x86,0x9C,0x8D,0x8F,0x90, \ 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,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, \ 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \ 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \ 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF} #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */ #if _USE_LFN #error Cannot use LFN feature without valid code page. #endif #define _DF1S 0 #else #error Unknown code page #endif /* Character code support macros */ #define IsUpper(c) (((c)>='A')&&((c)<='Z')) #define IsLower(c) (((c)>='a')&&((c)<='z')) #define IsDigit(c) (((c)>='0')&&((c)<='9')) #if _DF1S /* Code page is DBCS */ #ifdef _DF2S /* Two 1st byte areas */ #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) #else /* One 1st byte area */ #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) #endif #ifdef _DS3S /* Three 2nd byte areas */ #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) #else /* Two 2nd byte areas */ #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) #endif #else /* Code page is SBCS */ #define IsDBCS1(c) 0 #define IsDBCS2(c) 0 #endif /* _DF1S */ /* Name status flags */ #define NSFLAG 11 /* Index of name status byte in fn[] */ #define NS_LOSS 0x01 /* Out of 8.3 format */ #define NS_LFN 0x02 /* Force to create LFN entry */ #define NS_LAST 0x04 /* Last segment */ #define NS_BODY 0x08 /* Lower case flag (body) */ #define NS_EXT 0x10 /* Lower case flag (ext) */ #define NS_DOT 0x20 /* Dot entry */ /* FAT sub-type boundaries (Differ from specs but correct for real DOS/Windows) */ #define MIN_FAT16 4086U /* Minimum number of clusters of FAT16 */ #define MIN_FAT32 65526U /* Minimum number of clusters of FAT32 */ /* FatFs refers the members in the FAT structures as byte array instead of / structure members because the structure is not binary compatible between / different platforms */ #define BS_jmpBoot 0 /* x86 jump instruction (3) */ #define BS_OEMName 3 /* OEM name (8) */ #define BPB_BytsPerSec 11 /* Sector size [byte] (2) */ #define BPB_SecPerClus 13 /* Cluster size [sector] (1) */ #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */ #define BPB_NumFATs 16 /* Number of FAT copies (1) */ #define BPB_RootEntCnt 17 /* Number of root directory entries for FAT12/16 (2) */ #define BPB_TotSec16 19 /* Volume size [sector] (2) */ #define BPB_Media 21 /* Media descriptor (1) */ #define BPB_FATSz16 22 /* FAT size [sector] (2) */ #define BPB_SecPerTrk 24 /* Track size [sector] (2) */ #define BPB_NumHeads 26 /* Number of heads (2) */ #define BPB_HiddSec 28 /* Number of special hidden sectors (4) */ #define BPB_TotSec32 32 /* Volume size [sector] (4) */ #define BS_DrvNum 36 /* Physical drive number (1) */ #define BS_NTres 37 /* Error flag (1) */ #define BS_BootSig 38 /* Extended boot signature (1) */ #define BS_VolID 39 /* Volume serial number (4) */ #define BS_VolLab 43 /* Volume label (8) */ #define BS_FilSysType 54 /* File system type (1) */ #define BPB_FATSz32 36 /* FAT size [sector] (4) */ #define BPB_ExtFlags 40 /* Extended flags (2) */ #define BPB_FSVer 42 /* File system version (2) */ #define BPB_RootClus 44 /* Root directory first cluster (4) */ #define BPB_FSInfo 48 /* Offset of FSINFO sector (2) */ #define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */ #define BS_DrvNum32 64 /* Physical drive number (1) */ #define BS_NTres32 65 /* Error flag (1) */ #define BS_BootSig32 66 /* Extended boot signature (1) */ #define BS_VolID32 67 /* Volume serial number (4) */ #define BS_VolLab32 71 /* Volume label (8) */ #define BS_FilSysType32 82 /* File system type (1) */ #define FSI_LeadSig 0 /* FSI: Leading signature (4) */ #define FSI_StrucSig 484 /* FSI: Structure signature (4) */ #define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */ #define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */ #define MBR_Table 446 /* MBR: Partition table offset (2) */ #define SZ_PTE 16 /* MBR: Size of a partition table entry */ #define BS_55AA 510 /* Signature word (2) */ #define DIR_Name 0 /* Short file name (11) */ #define DIR_Attr 11 /* Attribute (1) */ #define DIR_NTres 12 /* Lower case flag (1) */ #define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */ #define DIR_CrtTime 14 /* Created time (2) */ #define DIR_CrtDate 16 /* Created date (2) */ #define DIR_LstAccDate 18 /* Last accessed date (2) */ #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */ #define DIR_WrtTime 22 /* Modified time (2) */ #define DIR_WrtDate 24 /* Modified date (2) */ #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */ #define DIR_FileSize 28 /* File size (4) */ #define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */ #define LDIR_Attr 11 /* LFN attribute (1) */ #define LDIR_Type 12 /* LFN type (1) */ #define LDIR_Chksum 13 /* Checksum of corresponding SFN entry */ #define LDIR_FstClusLO 26 /* Must be zero (0) */ #define SZ_DIRE 32 /* Size of a directory entry */ #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */ #define DDEM 0xE5 /* Deleted directory entry mark at DIR_Name[0] */ #define RDDEM 0x05 /* Replacement of the character collides with DDEM */ /*-------------------------------------------------------------------------- Module Private Work Area ---------------------------------------------------------------------------*/ /* Remark: Uninitialized variables with static duration are guaranteed / zero/null at start-up. If not, either the linker or start-up routine / being used is not compliance with ANSI-C standard. */ #if _VOLUMES < 1 || _VOLUMES > 9 #error Wrong _VOLUMES setting #endif static FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */ static WORD Fsid; /* File system mount ID */ #if _FS_RPATH && _VOLUMES >= 2 static BYTE CurrVol; /* Current drive */ #endif #if _FS_LOCK static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */ #endif #if _USE_LFN == 0 /* Non LFN feature */ #define DEFINE_NAMEBUF BYTE sfn[12] #define INIT_BUF(dobj) (dobj).fn = sfn #define FREE_BUF() #else #if _MAX_LFN < 12 || _MAX_LFN > 255 #error Wrong _MAX_LFN setting #endif #if _USE_LFN == 1 /* LFN feature with static working buffer */ static WCHAR LfnBuf[_MAX_LFN + 1]; #define DEFINE_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 DEFINE_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 DEFINE_NAMEBUF BYTE sfn[12]; WCHAR *lfn #define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); (dobj).lfn = lfn; (dobj).fn = sfn; } #define FREE_BUF() ff_memfree(lfn) #else #error Wrong _USE_LFN setting #endif #endif #ifdef _EXCVT static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for SBCS extended characters */ #endif /*-------------------------------------------------------------------------- Module Private Functions ---------------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/ /* String functions */ /*-----------------------------------------------------------------------*/ /* Copy memory to memory */ static void mem_cpy (void* dst, const void* src, UINT cnt) { BYTE *d = (BYTE*)dst; const BYTE *s = (const BYTE*)src; #if _WORD_ACCESS == 1 while (cnt >= sizeof (int)) { *(int*)d = *(int*)s; d += sizeof (int); s += sizeof (int); cnt -= sizeof (int); } #endif while (cnt--) *d++ = *s++; } /* Fill memory */ static void mem_set (void* dst, int val, UINT cnt) { BYTE *d = (BYTE*)dst; while (cnt--) *d++ = (BYTE)val; } /* Compare memory to memory */ static int mem_cmp (const void* dst, const void* src, UINT cnt) { const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; int r = 0; while (cnt-- && (r = *d++ - *s++) == 0) ; return r; } /* Check if chr is contained in the string */ static int chk_chr (const char* str, int chr) { while (*str && *str != chr) str++; return *str; } /*-----------------------------------------------------------------------*/ /* Request/Release grant to access the volume */ /*-----------------------------------------------------------------------*/ #if _FS_REENTRANT static int lock_fs ( FATFS* fs /* File system object */ ) { return ff_req_grant(fs->sobj); } static void unlock_fs ( FATFS* fs, /* File system object */ FRESULT res /* Result code to be returned */ ) { if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_INVALID_OBJECT && res != FR_TIMEOUT) { ff_rel_grant(fs->sobj); } } #endif /*-----------------------------------------------------------------------*/ /* File lock control functions */ /*-----------------------------------------------------------------------*/ #if _FS_LOCK static FRESULT chk_lock ( /* Check if the file can be accessed */ FATFS_DIR* dp, /* Directory object pointing the file to be checked */ int acc /* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */ ) { UINT i, be; /* Search file semaphore table */ for (i = be = 0; i < _FS_LOCK; i++) { if (Files[i].fs) { /* Existing entry */ if (Files[i].fs == dp->fs && /* Check if the object matched with an open object */ Files[i].clu == dp->sclust && Files[i].idx == dp->index) break; } else { /* Blank entry */ be = 1; } } if (i == _FS_LOCK) /* The object is not opened */ return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */ /* The object has been opened. Reject any open against writing file and all write mode open */ return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK; } static int enq_lock (void) /* Check if an entry is available for a new object */ { UINT i; for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; return (i == _FS_LOCK) ? 0 : 1; } static UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */ FATFS_DIR* dp, /* Directory object pointing the file to register or increment */ int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ ) { UINT i; for (i = 0; i < _FS_LOCK; i++) { /* Find the object */ if (Files[i].fs == dp->fs && Files[i].clu == dp->sclust && Files[i].idx == dp->index) break; } if (i == _FS_LOCK) { /* Not opened. Register it as new. */ for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; if (i == _FS_LOCK) return 0; /* No free entry to register (int err) */ Files[i].fs = dp->fs; Files[i].clu = dp->sclust; Files[i].idx = dp->index; Files[i].ctr = 0; } if (acc && Files[i].ctr) return 0; /* Access violation (int err) */ Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */ return i + 1; } static FRESULT dec_lock ( /* Decrement object open counter */ UINT i /* Semaphore index (1..) */ ) { WORD n; FRESULT res; if (--i < _FS_LOCK) { /* Shift index number origin from 0 */ n = Files[i].ctr; if (n == 0x100) n = 0; /* If write mode open, delete the entry */ if (n) n--; /* Decrement read mode open count */ Files[i].ctr = n; if (!n) Files[i].fs = 0; /* Delete the entry if open count gets zero */ res = FR_OK; } else { res = FR_INT_ERR; /* Invalid index nunber */ } return res; } static void clear_lock ( /* Clear lock entries of the volume */ FATFS *fs ) { UINT i; for (i = 0; i < _FS_LOCK; i++) { if (Files[i].fs == fs) Files[i].fs = 0; } } #endif /*-----------------------------------------------------------------------*/ /* Move/Flush disk access window in the file system object */ /*-----------------------------------------------------------------------*/ #if !_FS_READONLY static FRESULT sync_window ( /* FR_OK:succeeded, !=0:error */ FATFS* fs /* File system object */ ) { DWORD wsect; UINT nf; FRESULT res = FR_OK; if (fs->wflag) { /* Write back the sector if it is dirty */ wsect = fs->winsect; /* Current sector number */ if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) { res = FR_DISK_ERR; } else { fs->wflag = 0; if (wsect - fs->fatbase < fs->fsize) { /* Is it in the FAT area? */ for (nf = fs->n_fats; nf >= 2; nf--) { /* Reflect the change to all FAT copies */ wsect += fs->fsize; disk_write(fs->drv, fs->win, wsect, 1); } } } } return res; } #endif static FRESULT move_window ( /* FR_OK(0):succeeded, !=0:error */ FATFS* fs, /* File system object */ DWORD sector /* Sector number to make appearance in the fs->win[] */ ) { FRESULT res = FR_OK; if (sector != fs->winsect) { /* Window offset changed? */ #if !_FS_READONLY res = sync_window(fs); /* Write-back changes */ #endif if (res == FR_OK) { /* Fill sector window with new data */ if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) { sector = 0xFFFFFFFF; /* Invalidate window if data is not reliable */ res = FR_DISK_ERR; } fs->winsect = sector; } } return res; } /*-----------------------------------------------------------------------*/ /* Synchronize file system and strage device */ /*-----------------------------------------------------------------------*/ #if !_FS_READONLY static FRESULT sync_fs ( /* FR_OK:succeeded, !=0:error */ FATFS* fs /* File system object */ ) { FRESULT res; res = sync_window(fs); if (res == FR_OK) { /* Update FSInfo sector if needed */ if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) { /* Create FSInfo structure */ mem_set(fs->win, 0, SS(fs)); ST_WORD(fs->win + BS_55AA, 0xAA55); ST_DWORD(fs->win + FSI_LeadSig, 0x41615252); ST_DWORD(fs->win + FSI_StrucSig, 0x61417272); ST_DWORD(fs->win + FSI_Free_Count, fs->free_clust); ST_DWORD(fs->win + FSI_Nxt_Free, fs->last_clust); /* Write it into the FSInfo sector */ fs->winsect = fs->volbase + 1; disk_write(fs->drv, fs->win, fs->winsect, 1); fs->fsi_flag = 0; } /* Make sure that no pending write process in the physical drive */ if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK) res = FR_DISK_ERR; } return res; } #endif /*-----------------------------------------------------------------------*/ /* Get sector# from cluster# */ /*-----------------------------------------------------------------------*/ /* Hidden API for hacks and disk tools */ DWORD clust2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */ FATFS* fs, /* File system object */ DWORD clst /* Cluster# to be converted */ ) { clst -= 2; if (clst >= fs->n_fatent - 2) return 0; /* Invalid cluster# */ return clst * fs->csize + fs->database; } /*-----------------------------------------------------------------------*/ /* FAT access - Read value of a FAT entry */ /*-----------------------------------------------------------------------*/ /* Hidden API for hacks and disk tools */ DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x0FFFFFFF:Cluster status */ FATFS* fs, /* File system object */ DWORD clst /* FAT index number (cluster number) to get the value */ ) { UINT wc, bc; BYTE *p; DWORD val; if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */ val = 1; /* Internal error */ } else { val = 0xFFFFFFFF; /* Default value falls on disk error */ switch (fs->fs_type) { case FS_FAT12 : bc = (UINT)clst; bc += bc / 2; if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; wc = fs->win[bc++ % SS(fs)]; if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; wc |= fs->win[bc % SS(fs)] << 8; val = clst & 1 ? wc >> 4 : (wc & 0xFFF); break; case FS_FAT16 : if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break; p = &fs->win[clst * 2 % SS(fs)]; val = LD_WORD(p); break; case FS_FAT32 : if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break; p = &fs->win[clst * 4 % SS(fs)]; val = LD_DWORD(p) & 0x0FFFFFFF; break; default: val = 1; /* Internal error */ } } return val; } /*-----------------------------------------------------------------------*/ /* FAT access - Change value of a FAT entry */ /*-----------------------------------------------------------------------*/ /* Hidden API for hacks and disk tools */ #if !_FS_READONLY FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */ FATFS* fs, /* File system object */ DWORD clst, /* FAT index number (cluster number) to be changed */ DWORD val /* New value to be set to the entry */ ) { UINT bc; BYTE *p; FRESULT res; if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */ res = FR_INT_ERR; } else { switch (fs->fs_type) { case FS_FAT12 : bc = (UINT)clst; bc += bc / 2; res = move_window(fs, fs->fatbase + (bc / SS(fs))); if (res != FR_OK) break; p = &fs->win[bc++ % SS(fs)]; *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; fs->wflag = 1; res = move_window(fs, fs->fatbase + (bc / SS(fs))); if (res != FR_OK) break; p = &fs->win[bc % SS(fs)]; *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); fs->wflag = 1; break; case FS_FAT16 : res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); if (res != FR_OK) break; p = &fs->win[clst * 2 % SS(fs)]; ST_WORD(p, (WORD)val); fs->wflag = 1; break; case FS_FAT32 : res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); if (res != FR_OK) break; p = &fs->win[clst * 4 % SS(fs)]; val |= LD_DWORD(p) & 0xF0000000; ST_DWORD(p, val); fs->wflag = 1; break; default : res = FR_INT_ERR; } } return res; } #endif /* !_FS_READONLY */ /*-----------------------------------------------------------------------*/ /* FAT handling - Remove a cluster chain */ /*-----------------------------------------------------------------------*/ #if !_FS_READONLY static FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */ FATFS* fs, /* File system object */ DWORD clst /* Cluster# to remove a chain from */ ) { FRESULT res; DWORD nxt; #if _USE_TRIM DWORD scl = clst, ecl = clst, rt[2]; #endif if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */ res = FR_INT_ERR; } else { res = FR_OK; while (clst < fs->n_fatent) { /* Not a last link? */ nxt = get_fat(fs, clst); /* Get cluster status */ if (nxt == 0) break; /* Empty cluster? */ if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */ if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */ res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */ if (res != FR_OK) break; if (fs->free_clust != 0xFFFFFFFF) { /* Update FSINFO */ fs->free_clust++; fs->fsi_flag |= 1; } #if _USE_TRIM if (ecl + 1 == nxt) { /* Is next cluster contiguous? */ ecl = nxt; } else { /* End of contiguous clusters */ rt[0] = clust2sect(fs, scl); /* Start sector */ rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ disk_ioctl(fs->drv, CTRL_TRIM, rt); /* Erase the block */ scl = ecl = nxt; } #endif clst = nxt; /* Next cluster */ } } return res; } #endif /*-----------------------------------------------------------------------*/ /* FAT handling - Stretch or Create a cluster chain */ /*-----------------------------------------------------------------------*/ #if !_FS_READONLY static DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ FATFS* fs, /* File system object */ DWORD clst /* Cluster# to stretch, 0:Create a new chain */ ) { DWORD cs, ncl, scl; FRESULT res; if (clst == 0) { /* Create a new chain */ scl = fs->last_clust; /* Get suggested start point */ if (!scl || scl >= fs->n_fatent) scl = 1; } else { /* Stretch the current chain */ cs = get_fat(fs, clst); /* Check the cluster status */ if (cs < 2) return 1; /* Invalid value */ if (cs == 0xFFFFFFFF) return cs; /* A disk error occurred */ if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */ scl = clst; } ncl = scl; /* Start cluster */ for (;;) { ncl++; /* Next cluster */ if (ncl >= fs->n_fatent) { /* Check wrap around */ ncl = 2; if (ncl > scl) return 0; /* No free cluster */ } cs = get_fat(fs, ncl); /* Get the cluster status */ if (cs == 0) break; /* Found a free cluster */ if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */ return cs; if (ncl == scl) return 0; /* No free cluster */ } res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */ if (res == FR_OK && clst != 0) { res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */ } if (res == FR_OK) { fs->last_clust = ncl; /* Update FSINFO */ if (fs->free_clust != 0xFFFFFFFF) { fs->free_clust--; fs->fsi_flag |= 1; } } else { ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; } return ncl; /* Return new cluster number or error code */ } #endif /* !_FS_READONLY */ /*-----------------------------------------------------------------------*/ /* FAT handling - Convert offset into cluster with link map table */ /*-----------------------------------------------------------------------*/ #if _USE_FASTSEEK static DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ FIL* fp, /* Pointer to the file object */ DWORD ofs /* File offset to be converted to cluster# */ ) { DWORD cl, ncl, *tbl; tbl = fp->cltbl + 1; /* Top of CLMT */ cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */ for (;;) { ncl = *tbl++; /* Number of cluters in the fragment */ if (!ncl) return 0; /* End of table? (error) */ if (cl < ncl) break; /* In this fragment? */ cl -= ncl; tbl++; /* Next fragment */ } return cl + *tbl; /* Return the cluster number */ } #endif /* _USE_FASTSEEK */ /*-----------------------------------------------------------------------*/ /* Directory handling - Set directory index */ /*-----------------------------------------------------------------------*/ static FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */ FATFS_DIR* dp, /* Pointer to directory object */ UINT idx /* Index of directory table */ ) { DWORD clst, sect; UINT ic; dp->index = (WORD)idx; /* Current index */ clst = dp->sclust; /* Table start cluster (0:root) */ if (clst == 1 || clst >= dp->fs->n_fatent) /* Check start cluster range */ return FR_INT_ERR; if (!clst && dp->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ clst = dp->fs->dirbase; if (clst == 0) { /* Static table (root-directory in FAT12/16) */ if (idx >= dp->fs->n_rootdir) /* Is index out of range? */ return FR_INT_ERR; sect = dp->fs->dirbase; } else { /* Dynamic table (root-directory in FAT32 or sub-directory) */ ic = SS(dp->fs) / SZ_DIRE * dp->fs->csize; /* Entries per cluster */ while (idx >= ic) { /* Follow cluster chain */ clst = get_fat(dp->fs, clst); /* Get next cluster */ if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ if (clst < 2 || clst >= dp->fs->n_fatent) /* Reached to end of table or internal error */ return FR_INT_ERR; idx -= ic; } sect = clust2sect(dp->fs, clst); } dp->clust = clst; /* Current cluster# */ if (!sect) return FR_INT_ERR; dp->sect = sect + idx / (SS(dp->fs) / SZ_DIRE); /* Sector# of the directory entry */ dp->dir = dp->fs->win + (idx % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Ptr to the entry in the sector */ return FR_OK; } /*-----------------------------------------------------------------------*/ /* Directory handling - Move directory table index next */ /*-----------------------------------------------------------------------*/ static FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */ FATFS_DIR* dp, /* Pointer to the directory object */ int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ ) { DWORD clst; UINT i; #if !_FS_READONLY UINT c; #endif i = dp->index + 1; if (!(i & 0xFFFF) || !dp->sect) /* Report EOT when index has reached 65535 */ return FR_NO_FILE; if (!(i % (SS(dp->fs) / SZ_DIRE))) { /* Sector changed? */ dp->sect++; /* Next sector */ if (!dp->clust) { /* Static table */ if (i >= dp->fs->n_rootdir) /* Report EOT if it reached end of static table */ return FR_NO_FILE; } else { /* Dynamic table */ if (((i / (SS(dp->fs) / SZ_DIRE)) & (dp->fs->csize - 1)) == 0) { /* Cluster changed? */ clst = get_fat(dp->fs, dp->clust); /* Get next cluster */ if (clst <= 1) return FR_INT_ERR; if (clst == 0xFFFFFFFF) return FR_DISK_ERR; if (clst >= dp->fs->n_fatent) { /* If it reached end of dynamic table, */ #if !_FS_READONLY if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT */ clst = create_chain(dp->fs, dp->clust); /* Stretch cluster chain */ if (clst == 0) return FR_DENIED; /* No free cluster */ if (clst == 1) return FR_INT_ERR; if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Clean-up stretched table */ if (sync_window(dp->fs)) return FR_DISK_ERR;/* Flush disk access window */ mem_set(dp->fs->win, 0, SS(dp->fs)); /* Clear window buffer */ dp->fs->winsect = clust2sect(dp->fs, clst); /* Cluster start sector */ for (c = 0; c < dp->fs->csize; c++) { /* Fill the new cluster with 0 */ dp->fs->wflag = 1; if (sync_window(dp->fs)) return FR_DISK_ERR; dp->fs->winsect++; } dp->fs->winsect -= c; /* Rewind window offset */ #else if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT (this is to suppress warning) */ return FR_NO_FILE; /* Report EOT */ #endif } dp->clust = clst; /* Initialize data for new cluster */ dp->sect = clust2sect(dp->fs, clst); } } } dp->index = (WORD)i; /* Current index */ dp->dir = dp->fs->win + (i % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Current entry in the window */ return FR_OK; } /*-----------------------------------------------------------------------*/ /* Directory handling - Reserve directory entry */ /*-----------------------------------------------------------------------*/ #if !_FS_READONLY static FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */ FATFS_DIR* dp, /* Pointer to the directory object */ UINT nent /* Number of contiguous entries to allocate (1-21) */ ) { FRESULT res; UINT n; res = dir_sdi(dp, 0); if (res == FR_OK) { n = 0; do { res = move_window(dp->fs, dp->sect); if (res != FR_OK) break; if (dp->dir[0] == DDEM || dp->dir[0] == 0) { /* Is it a free entry? */ if (++n == nent) break; /* A block of contiguous free entries is found */ } else { n = 0; /* Not a blank entry. Restart to search */ } res = dir_next(dp, 1); /* Next entry with table stretch enabled */ } while (res == FR_OK); } if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */ return res; } #endif /*-----------------------------------------------------------------------*/ /* Directory handling - Load/Store start cluster number */ /*-----------------------------------------------------------------------*/ static DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */ FATFS* fs, /* Pointer to the fs object */ const BYTE* dir /* Pointer to the SFN entry */ ) { DWORD cl; cl = LD_WORD(dir + DIR_FstClusLO); if (fs->fs_type == FS_FAT32) cl |= (DWORD)LD_WORD(dir + DIR_FstClusHI) << 16; return cl; } #if !_FS_READONLY static void st_clust ( BYTE* dir, /* Pointer to the SFN entry */ DWORD cl /* Value to be set */ ) { ST_WORD(dir + DIR_FstClusLO, cl); ST_WORD(dir + DIR_FstClusHI, cl >> 16); } #endif /*-----------------------------------------------------------------------*/ /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */ /*-----------------------------------------------------------------------*/ #if _USE_LFN static const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN characters in the directory entry */ static int cmp_lfn ( /* 1:matched, 0:not matched */ WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */ BYTE* dir /* Pointer to the directory entry containing the part of LFN */ ) { UINT i, s; WCHAR wc, uc; if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */ i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */ if (wc) { if (i >= _MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) /* Compare it */ return 0; /* Not matched */ wc = uc; } else { if (uc != 0xFFFF) return 0; /* Check filler */ } } if ((dir[LDIR_Ord] & LLEF) && 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 or invalid LFN entry */ WCHAR* lfnbuf, /* Pointer to the LFN working buffer */ BYTE* dir /* Pointer to the LFN entry */ ) { UINT i, s; WCHAR wc, uc; if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */ i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */ if (wc) { if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ lfnbuf[i++] = wc = uc; /* Store it */ } else { if (uc != 0xFFFF) return 0; /* Check filler */ } } if (dir[LDIR_Ord] & LLEF) { /* Put terminator if it is the last LFN part */ if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ lfnbuf[i] = 0; } return 1; /* The part of LFN is valid */ } #if !_FS_READONLY static void fit_lfn ( const WCHAR* lfnbuf, /* Pointer to the LFN working buffer */ BYTE* dir, /* Pointer to the LFN entry to be processed */ BYTE ord, /* LFN order (1-20) */ BYTE sum /* Checksum of the corresponding SFN */ ) { UINT i, s; WCHAR wc; dir[LDIR_Chksum] = sum; /* Set checksum */ 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 working buffer */ s = wc = 0; do { if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective character */ ST_WORD(dir+LfnOfs[s], wc); /* Put it */ if (!wc) wc = 0xFFFF; /* Padding characters following last character */ } while (++s < 13); if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLEF; /* Bottom LFN part is the start of LFN sequence */ dir[LDIR_Ord] = ord; /* Set the LFN order */ } #endif #endif /*-----------------------------------------------------------------------*/ /* Create numbered name */ /*-----------------------------------------------------------------------*/ #if _USE_LFN static void gen_numname ( BYTE* dst, /* Pointer to the buffer to store numbered SFN */ const BYTE* src, /* Pointer to SFN */ const WCHAR* lfn, /* Pointer to LFN */ UINT seq /* Sequence number */ ) { BYTE ns[8], c; UINT i, j; WCHAR wc; DWORD sr; mem_cpy(dst, src, 11); if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */ sr = seq; while (*lfn) { /* Create a CRC */ wc = *lfn++; for (i = 0; i < 16; i++) { sr = (sr << 1) + (wc & 1); wc >>= 1; if (sr & 0x10000) sr ^= 0x11021; } } seq = (UINT)sr; } /* itoa (hexdecimal) */ i = 7; do { c = (seq % 16) + '0'; if (c > '9') c += 7; ns[i--] = c; seq /= 16; } while (seq); ns[i] = '~'; /* Append the number */ for (j = 0; j < i && dst[j] != ' '; j++) { if (IsDBCS1(dst[j])) { if (j == i - 1) break; j++; } } do { dst[j++] = (i < 8) ? ns[i++] : ' '; } while (j < 8); } #endif /*-----------------------------------------------------------------------*/ /* Calculate checksum of an SFN entry */ /*-----------------------------------------------------------------------*/ #if _USE_LFN static BYTE sum_sfn ( const BYTE* dir /* Pointer to the SFN entry */ ) { BYTE sum = 0; UINT n = 11; do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n); return sum; } #endif /*-----------------------------------------------------------------------*/ /* Directory handling - Find an object in the directory */ /*-----------------------------------------------------------------------*/ static FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */ FATFS_DIR* dp /* Pointer to the directory object linked to the file name */ ) { FRESULT res; BYTE c, *dir; #if _USE_LFN BYTE a, ord, sum; #endif res = dir_sdi(dp, 0); /* Rewind directory object */ if (res != FR_OK) return res; #if _USE_LFN ord = sum = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */ #endif do { res = move_window(dp->fs, dp->sect); if (res != FR_OK) break; dir = dp->dir; /* Ptr to the directory entry of current index */ c = dir[DIR_Name]; if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ #if _USE_LFN /* LFN configuration */ a = dir[DIR_Attr] & AM_MASK; if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */ } else { if (a == AM_LFN) { /* An LFN entry is found */ if (dp->lfn) { if (c & LLEF) { /* Is it start of LFN sequence? */ sum = dir[LDIR_Chksum]; c &= ~LLEF; ord = c; /* LFN start order */ dp->lfn_idx = dp->index; /* Start index of LFN */ } /* Check validity of the LFN entry and compare it with given name */ ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF; } } else { /* An SFN entry is found */ if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */ if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dir, dp->fn, 11)) break; /* SFN matched? */ ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */ } } #else /* Non LFN configuration */ if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dp->fn, 11)) /* Is it a valid entry? */ break; #endif res = dir_next(dp, 0); /* Next entry */ } while (res == FR_OK); return res; } /*-----------------------------------------------------------------------*/ /* Read an object from the directory */ /*-----------------------------------------------------------------------*/ #if _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 static FRESULT dir_read ( FATFS_DIR* dp, /* Pointer to the directory object */ int vol /* Filtered by 0:file/directory or 1:volume label */ ) { FRESULT res; BYTE a, c, *dir; #if _USE_LFN BYTE ord = 0xFF, sum = 0xFF; #endif res = FR_NO_FILE; while (dp->sect) { res = move_window(dp->fs, dp->sect); if (res != FR_OK) break; dir = dp->dir; /* Ptr to the directory entry of current index */ c = dir[DIR_Name]; if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ a = dir[DIR_Attr] & AM_MASK; #if _USE_LFN /* LFN configuration */ if (c == DDEM || (!_FS_RPATH && c == '.') || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */ ord = 0xFF; } else { if (a == AM_LFN) { /* An LFN entry is found */ if (c & LLEF) { /* Is it start of LFN sequence? */ sum = dir[LDIR_Chksum]; c &= ~LLEF; ord = c; dp->lfn_idx = dp->index; } /* Check LFN validity and capture it */ ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF; } else { /* An SFN entry is found */ if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */ dp->lfn_idx = 0xFFFF; /* It has no LFN. */ break; } } #else /* Non LFN configuration */ if (c != DDEM && (_FS_RPATH || c != '.') && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) /* Is it a valid entry? */ break; #endif res = dir_next(dp, 0); /* Next entry */ if (res != FR_OK) break; } if (res != FR_OK) dp->sect = 0; return res; } #endif /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */ /*-----------------------------------------------------------------------*/ /* Register an object to the directory */ /*-----------------------------------------------------------------------*/ #if !_FS_READONLY static FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */ FATFS_DIR* dp /* Target directory with object name to be created */ ) { FRESULT res; #if _USE_LFN /* LFN configuration */ UINT n, nent; BYTE sn[12], *fn, sum; WCHAR *lfn; fn = dp->fn; lfn = dp->lfn; mem_cpy(sn, fn, 12); if (_FS_RPATH && (sn[NSFLAG] & NS_DOT)) /* Cannot create dot entry */ return FR_INVALID_NAME; if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ fn[NSFLAG] = 0; dp->lfn = 0; /* Find only SFN */ for (n = 1; n < 100; n++) { gen_numname(fn, sn, lfn, n); /* Generate a numbered name */ res = dir_find(dp); /* Check if the name collides with existing SFN */ if (res != FR_OK) break; } if (n == 100) return FR_DENIED; /* Abort if too many collisions */ if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ fn[NSFLAG] = sn[NSFLAG]; dp->lfn = lfn; } if (sn[NSFLAG] & NS_LFN) { /* When LFN is to be created, allocate entries for an SFN + LFNs. */ for (n = 0; lfn[n]; n++) ; nent = (n + 25) / 13; } else { /* Otherwise allocate an entry for an SFN */ nent = 1; } res = dir_alloc(dp, nent); /* Allocate entries */ if (res == FR_OK && --nent) { /* Set LFN entry if needed */ res = dir_sdi(dp, dp->index - nent); if (res == FR_OK) { sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */ do { /* Store LFN entries in bottom first */ res = move_window(dp->fs, dp->sect); if (res != FR_OK) break; fit_lfn(dp->lfn, dp->dir, (BYTE)nent, sum); dp->fs->wflag = 1; res = dir_next(dp, 0); /* Next entry */ } while (res == FR_OK && --nent); } } #else /* Non LFN configuration */ res = dir_alloc(dp, 1); /* Allocate an entry for SFN */ #endif if (res == FR_OK) { /* Set SFN entry */ res = move_window(dp->fs, dp->sect); if (res == FR_OK) { mem_set(dp->dir, 0, SZ_DIRE); /* Clean the entry */ mem_cpy(dp->dir, dp->fn, 11); /* Put SFN */ #if _USE_LFN dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */ #endif dp->fs->wflag = 1; } } return res; } #endif /* !_FS_READONLY */ /*-----------------------------------------------------------------------*/ /* Remove an object from the directory */ /*-----------------------------------------------------------------------*/ #if !_FS_READONLY && !_FS_MINIMIZE static FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */ FATFS_DIR* dp /* Directory object pointing the entry to be removed */ ) { FRESULT res; #if _USE_LFN /* LFN configuration */ UINT i; i = dp->index; /* SFN index */ res = dir_sdi(dp, (dp->lfn_idx == 0xFFFF) ? i : dp->lfn_idx); /* Goto the SFN or top of the LFN entries */ if (res == FR_OK) { do { res = move_window(dp->fs, dp->sect); if (res != FR_OK) break; mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */ *dp->dir = DDEM; dp->fs->wflag = 1; if (dp->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */ res = dir_next(dp, 0); /* Next entry */ } while (res == FR_OK); if (res == FR_NO_FILE) res = FR_INT_ERR; } #else /* Non LFN configuration */ res = dir_sdi(dp, dp->index); if (res == FR_OK) { res = move_window(dp->fs, dp->sect); if (res == FR_OK) { mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */ *dp->dir = DDEM; dp->fs->wflag = 1; } } #endif return res; } #endif /* !_FS_READONLY */ /*-----------------------------------------------------------------------*/ /* Get file information from directory entry */ /*-----------------------------------------------------------------------*/ #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 static void get_fileinfo ( /* No return code */ FATFS_DIR* dp, /* Pointer to the directory object */ FILINFO* fno /* Pointer to the file information to be filled */ ) { UINT i; TCHAR *p, c; BYTE *dir; #if _USE_LFN WCHAR w, *lfn; #endif p = fno->fname; if (dp->sect) { /* Get SFN */ dir = dp->dir; i = 0; while (i < 11) { /* Copy name body and extension */ c = (TCHAR)dir[i++]; if (c == ' ') continue; /* Skip padding spaces */ if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */ if (i == 9) *p++ = '.'; /* Insert a . if extension is exist */ #if _USE_LFN if (IsUpper(c) && (dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY))) c += 0x20; /* To lower */ #if _LFN_UNICODE if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dir[i])) c = c << 8 | dir[i++]; c = ff_convert(c, 1); /* OEM -> Unicode */ if (!c) c = '?'; #endif #endif *p++ = c; } fno->fattrib = dir[DIR_Attr]; /* Attribute */ fno->fsize = LD_DWORD(dir + DIR_FileSize); /* Size */ fno->fdate = LD_WORD(dir + DIR_WrtDate); /* Date */ fno->ftime = LD_WORD(dir + DIR_WrtTime); /* Time */ } *p = 0; /* Terminate SFN string by a \0 */ #if _USE_LFN if (fno->lfname) { i = 0; p = fno->lfname; if (dp->sect && fno->lfsize && dp->lfn_idx != 0xFFFF) { /* Get LFN if available */ lfn = dp->lfn; while ((w = *lfn++) != 0) { /* Get an LFN character */ #if !_LFN_UNICODE w = ff_convert(w, 0); /* Unicode -> OEM */ if (!w) { i = 0; break; } /* No LFN if it could not be converted */ if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */ p[i++] = (TCHAR)(w >> 8); #endif if (i >= fno->lfsize - 1) { i = 0; break; } /* No LFN if buffer overflow */ p[i++] = (TCHAR)w; } } p[i] = 0; /* Terminate LFN string by a \0 */ } #endif } #endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */ /*-----------------------------------------------------------------------*/ /* Pattern matching */ /*-----------------------------------------------------------------------*/ #if _USE_FIND && _FS_MINIMIZE <= 1 static WCHAR get_achar ( /* Get a character and advances ptr 1 or 2 */ const TCHAR** ptr /* Pointer to pointer to the SBCS/DBCS/Unicode string */ ) { WCHAR chr; #if !_LFN_UNICODE chr = (BYTE)*(*ptr)++; /* Get a byte */ if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */ if (IsDBCS1(chr) && IsDBCS2(**ptr)) /* Get DBC 2nd byte if needed */ chr = chr << 8 | (BYTE)*(*ptr)++; #ifdef _EXCVT if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */ #endif #else chr = ff_wtoupper(*(*ptr)++); /* Get a word and to upper */ #endif return chr; } static int pattern_matching ( /* 0:mismatched, 1:matched */ const TCHAR* pat, /* Matching pattern */ const TCHAR* nam, /* String to be tested */ int skip, /* Number of pre-skip chars (number of ?s) */ int inf /* Infinite search (* specified) */ ) { const TCHAR *pp, *np; WCHAR pc, nc; int nm, nx; while (skip--) { /* Pre-skip name chars */ if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */ } if (!*pat && inf) return 1; /* (short circuit) */ do { pp = pat; np = nam; /* Top of pattern and name to match */ for (;;) { if (*pp == '?' || *pp == '*') { /* Wildcard? */ nm = nx = 0; do { /* Analyze the wildcard chars */ if (*pp++ == '?') nm++; else nx = 1; } while (*pp == '?' || *pp == '*'); if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */ nc = *np; break; /* Branch mismatched */ } pc = get_achar(&pp); /* Get a pattern char */ nc = get_achar(&np); /* Get a name char */ if (pc != nc) break; /* Branch mismatched? */ if (!pc) return 1; /* Branch matched? (matched at end of both strings) */ } get_achar(&nam); /* nam++ */ } while (inf && nc); /* Retry until end of name if infinite search is specified */ return 0; } #endif /* _USE_FIND && _FS_MINIMIZE <= 1 */ /*-----------------------------------------------------------------------*/ /* Pick a top segment and create the object name in directory form */ /*-----------------------------------------------------------------------*/ static FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */ FATFS_DIR* dp, /* Pointer to the directory object */ const TCHAR** path /* Pointer to pointer to the segment in the path string */ ) { #if _USE_LFN /* LFN configuration */ BYTE b, cf; WCHAR w, *lfn; UINT i, ni, si, di; const TCHAR *p; /* Create LFN in Unicode */ for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ lfn = dp->lfn; si = di = 0; for (;;) { w = p[si++]; /* Get a character */ if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */ if (di >= _MAX_LFN) /* Reject too long name */ return FR_INVALID_NAME; #if !_LFN_UNICODE w &= 0xFF; if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ b = (BYTE)p[si++]; /* Get 2nd byte */ w = (w << 8) + b; /* Create a DBC */ if (!IsDBCS2(b)) return FR_INVALID_NAME; /* Reject invalid sequence */ } w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */ if (!w) return FR_INVALID_NAME; /* Reject invalid code */ #endif if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal characters for LFN */ return FR_INVALID_NAME; lfn[di++] = w; /* Store the Unicode character */ } *path = &p[si]; /* Return pointer to the next segment */ cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ #if _FS_RPATH if ((di == 1 && lfn[di - 1] == '.') || (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot entry? */ lfn[di] = 0; for (i = 0; i < 11; i++) /* Create dot name for SFN entry */ dp->fn[i] = (i < di) ? '.' : ' '; dp->fn[i] = cf | NS_DOT; /* This is a dot entry */ return FR_OK; } #endif while (di) { /* Snip off trailing spaces and dots if exist */ w = lfn[di - 1]; if (w != ' ' && w != '.') break; di--; } if (!di) return FR_INVALID_NAME; /* Reject nul string */ lfn[di] = 0; /* LFN is created */ /* Create SFN in directory form */ mem_set(dp->fn, ' ', 11); for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */ if (si) cf |= NS_LOSS | NS_LFN; while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */ b = i = 0; ni = 8; for (;;) { w = lfn[si++]; /* Get an LFN character */ if (!w) break; /* Break on end of the LFN */ if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */ cf |= NS_LOSS | NS_LFN; continue; } if (i >= ni || si == di) { /* Extension or end of SFN */ if (ni == 11) { /* Long extension */ cf |= NS_LOSS | NS_LFN; break; } if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */ if (si > di) break; /* No extension */ si = di; i = 8; ni = 11; /* Enter extension section */ b <<= 2; continue; } if (w >= 0x80) { /* Non ASCII character */ #ifdef _EXCVT w = ff_convert(w, 0); /* Unicode -> OEM code */ if (w) w = ExCvt[w - 0x80]; /* Convert extended character to upper (SBCS) */ #else w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */ #endif cf |= NS_LFN; /* Force create LFN entry */ } if (_DF1S && w >= 0x100) { /* Is this DBC? (always false at SBCS cfg) */ if (i >= ni - 1) { cf |= NS_LOSS | NS_LFN; i = ni; continue; } dp->fn[i++] = (BYTE)(w >> 8); } else { /* SBC */ if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */ w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ } else { if (IsUpper(w)) { /* ASCII large capital */ b |= 2; } else { if (IsLower(w)) { /* ASCII small capital */ b |= 1; w -= 0x20; } } } } dp->fn[i++] = (BYTE)w; } if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */ if (ni == 8) b <<= 2; if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */ cf |= NS_LFN; if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */ if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */ if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */ } dp->fn[NSFLAG] = cf; /* SFN is created */ return FR_OK; #else /* Non-LFN configuration */ BYTE b, c, d, *sfn; UINT ni, si, i; const char *p; /* Create file name in directory form */ for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Skip duplicated separator */ sfn = dp->fn; mem_set(sfn, ' ', 11); si = i = b = 0; ni = 8; #if _FS_RPATH if (p[si] == '.') { /* Is this a dot entry? */ for (;;) { c = (BYTE)p[si++]; if (c != '.' || si >= 3) break; sfn[i++] = c; } if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; *path = &p[si]; /* Return pointer to the next segment */ sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */ return FR_OK; } #endif for (;;) { c = (BYTE)p[si++]; if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */ if (c == '.' || i >= ni) { if (ni != 8 || c != '.') return FR_INVALID_NAME; i = 8; ni = 11; b <<= 2; continue; } if (c >= 0x80) { /* Extended character? */ b |= 3; /* Eliminate NT flag */ #ifdef _EXCVT c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */ #else #if !_DF1S return FR_INVALID_NAME; /* Reject extended characters (ASCII cfg) */ #endif #endif } if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false at 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 { /* SBC */ 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] == DDEM) sfn[0] = RDDEM; /* When first character collides with DDEM, replace it with RDDEM */ if (ni == 8) b <<= 2; if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */ if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */ sfn[NSFLAG] = c; /* Store NT flag, File name is created */ return FR_OK; #endif } /*-----------------------------------------------------------------------*/ /* Follow a file path */ /*-----------------------------------------------------------------------*/ static FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ FATFS_DIR* dp, /* Directory object to return last directory and found object */ const TCHAR* path /* Full-path string to find a file or directory */ ) { FRESULT res; BYTE *dir, ns; #if _FS_RPATH if (*path == '/' || *path == '\\') { /* There is a heading separator */ path++; dp->sclust = 0; /* Strip it and start from the root directory */ } else { /* No heading separator */ dp->sclust = dp->fs->cdir; /* Start from the current directory */ } #else if (*path == '/' || *path == '\\') /* Strip heading separator if exist */ path++; dp->sclust = 0; /* Always start from the root directory */ #endif if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */ res = dir_sdi(dp, 0); dp->dir = 0; } else { /* Follow path */ for (;;) { res = create_name(dp, &path); /* Get a segment name of the path */ if (res != FR_OK) break; res = dir_find(dp); /* Find an object with the sagment name */ ns = dp->fn[NSFLAG]; if (res != FR_OK) { /* Failed to find the object */ if (res == FR_NO_FILE) { /* Object is not found */ if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, */ dp->sclust = 0; dp->dir = 0; /* it is the root directory and stay there */ if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */ res = FR_OK; /* Ended at the root directroy. Function completed. */ } else { /* Could not find the object */ if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */ } } break; } if (ns & NS_LAST) break; /* Last segment matched. Function completed. */ dir = dp->dir; /* Follow the sub-directory */ if (!(dir[DIR_Attr] & AM_DIR)) { /* It is not a sub-directory and cannot follow */ res = FR_NO_PATH; break; } dp->sclust = ld_clust(dp->fs, dir); } } return res; } /*-----------------------------------------------------------------------*/ /* Get logical drive number from path name */ /*-----------------------------------------------------------------------*/ static int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */ const TCHAR** path /* Pointer to pointer to the path name */ ) { const TCHAR *tp, *tt; UINT i; int vol = -1; #if _STR_VOLUME_ID /* Find string drive id */ static const char* const str[] = {_VOLUME_STRS}; const char *sp; char c; TCHAR tc; #endif if (*path) { /* If the pointer is not a null */ for (tt = *path; (UINT)*tt >= (_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find ':' in the path */ if (*tt == ':') { /* If a ':' is exist in the path name */ tp = *path; i = *tp++ - '0'; if (i < 10 && tp == tt) { /* Is there a numeric drive id? */ if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */ vol = (int)i; *path = ++tt; } } #if _STR_VOLUME_ID else { /* No numeric drive number, find string drive id */ i = 0; tt++; do { sp = str[i]; tp = *path; do { /* Compare a string drive id with path name */ c = *sp++; tc = *tp++; if (IsLower(tc)) tc -= 0x20; } while (c && (TCHAR)c == tc); } while ((c || tp != tt) && ++i < _VOLUMES); /* Repeat for each id until pattern match */ if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */ vol = (int)i; *path = tt; } } #endif return vol; } #if _FS_RPATH && _VOLUMES >= 2 vol = CurrVol; /* Current drive */ #else vol = 0; /* Drive 0 */ #endif } return vol; } /*-----------------------------------------------------------------------*/ /* Load a sector and check if it is an FAT boot sector */ /*-----------------------------------------------------------------------*/ static BYTE check_fs ( /* 0:Valid FAT-BS, 1:Valid BS but not FAT, 2:Not a BS, 3:Disk error */ FATFS* fs, /* File system object */ DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ ) { fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */ if (move_window(fs, sect) != FR_OK) /* Load boot record */ return 3; if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */ return 2; if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ return 0; if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ return 0; return 1; } /*-----------------------------------------------------------------------*/ /* Find logical drive and check if the volume is mounted */ /*-----------------------------------------------------------------------*/ static FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */ FATFS** rfs, /* Pointer to pointer to the found file system object */ const TCHAR** path, /* Pointer to pointer to the path name (drive number) */ BYTE wmode /* !=0: Check write protection for write access */ ) { BYTE fmt, *pt; int vol; DSTATUS stat; DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4]; WORD nrsv; FATFS *fs; UINT i; /* Get logical drive number from the path name */ *rfs = 0; vol = get_ldnumber(path); if (vol < 0) return FR_INVALID_DRIVE; /* Check if the file system object is valid or not */ fs = FatFs[vol]; /* Get pointer to the file system object */ if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */ ENTER_FF(fs); /* Lock the volume */ *rfs = fs; /* Return pointer to the file system object */ if (fs->fs_type) { /* If the volume has been mounted */ stat = disk_status(fs->drv); if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */ if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */ return FR_WRITE_PROTECTED; return FR_OK; /* The file system object is valid */ } } /* The file system object is not valid. */ /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */ fs->fs_type = 0; /* Clear the file system object */ fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */ stat = disk_initialize(fs->drv); /* Initialize the physical drive */ if (stat & STA_NOINIT) /* Check if the initialization succeeded */ return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */ if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */ return FR_WRITE_PROTECTED; #if _MAX_SS != _MIN_SS /* Get sector size (multiple sector size cfg only) */ if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) < _MIN_SS || SS(fs) > _MAX_SS) return FR_DISK_ERR; #endif /* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */ bsect = 0; fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT boot sector as SFD */ if (fmt == 1 || (!fmt && (LD2PT(vol)))) { /* Not an FAT boot sector or forced partition number */ for (i = 0; i < 4; i++) { /* Get partition offset */ pt = fs->win + MBR_Table + i * SZ_PTE; br[i] = pt[4] ? LD_DWORD(&pt[8]) : 0; } i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */ if (i) i--; do { /* Find an FAT volume */ bsect = br[i]; fmt = bsect ? check_fs(fs, bsect) : 2; /* Check the partition */ } while (!LD2PT(vol) && fmt && ++i < 4); } if (fmt == 3) return FR_DISK_ERR; /* An error occured in the disk I/O layer */ if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */ /* An FAT volume is found. Following code initializes the file system object */ if (LD_WORD(fs->win + BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */ return FR_NO_FILESYSTEM; fasize = LD_WORD(fs->win + BPB_FATSz16); /* Number of sectors per FAT */ if (!fasize) fasize = LD_DWORD(fs->win + BPB_FATSz32); fs->fsize = fasize; fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */ if (fs->n_fats != 1 && fs->n_fats != 2) /* (Must be 1 or 2) */ return FR_NO_FILESYSTEM; fasize *= fs->n_fats; /* Number of sectors for FAT area */ fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */ if (!fs->csize || (fs->csize & (fs->csize - 1))) /* (Must be power of 2) */ return FR_NO_FILESYSTEM; fs->n_rootdir = LD_WORD(fs->win + BPB_RootEntCnt); /* Number of root directory entries */ if (fs->n_rootdir % (SS(fs) / SZ_DIRE)) /* (Must be sector aligned) */ return FR_NO_FILESYSTEM; tsect = LD_WORD(fs->win + BPB_TotSec16); /* Number of sectors on the volume */ if (!tsect) tsect = LD_DWORD(fs->win + BPB_TotSec32); nrsv = LD_WORD(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */ if (!nrsv) return FR_NO_FILESYSTEM; /* (Must not be 0) */ /* Determine the FAT sub type */ sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIRE); /* RSV + FAT + FATFS_DIR */ if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ fmt = FS_FAT12; if (nclst >= MIN_FAT16) fmt = FS_FAT16; if (nclst >= MIN_FAT32) fmt = FS_FAT32; /* Boundaries and Limits */ fs->n_fatent = nclst + 2; /* Number of FAT entries */ fs->volbase = bsect; /* Volume start sector */ fs->fatbase = bsect + nrsv; /* FAT start sector */ fs->database = bsect + sysect; /* Data start sector */ if (fmt == FS_FAT32) { if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ fs->dirbase = LD_DWORD(fs->win + BPB_RootClus); /* Root directory start cluster */ szbfat = fs->n_fatent * 4; /* (Needed FAT size) */ } else { if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */ fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */ fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); } if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than the size needed) */ return FR_NO_FILESYSTEM; #if !_FS_READONLY /* Initialize cluster allocation information */ fs->last_clust = fs->free_clust = 0xFFFFFFFF; /* Get fsinfo if available */ fs->fsi_flag = 0x80; #if (_FS_NOFSINFO & 3) != 3 if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo == 1 */ && LD_WORD(fs->win + BPB_FSInfo) == 1 && move_window(fs, bsect + 1) == FR_OK) { fs->fsi_flag = 0; if (LD_WORD(fs->win + BS_55AA) == 0xAA55 /* Load FSINFO data if available */ && LD_DWORD(fs->win + FSI_LeadSig) == 0x41615252 && LD_DWORD(fs->win + FSI_StrucSig) == 0x61417272) { #if (_FS_NOFSINFO & 1) == 0 fs->free_clust = LD_DWORD(fs->win + FSI_Free_Count); #endif #if (_FS_NOFSINFO & 2) == 0 fs->last_clust = LD_DWORD(fs->win + FSI_Nxt_Free); #endif } } #endif #endif fs->fs_type = fmt; /* FAT sub-type */ fs->id = ++Fsid; /* File system mount ID */ #if _FS_RPATH fs->cdir = 0; /* Set current directory to root */ #endif #if _FS_LOCK /* Clear file lock semaphores */ clear_lock(fs); #endif return FR_OK; } /*-----------------------------------------------------------------------*/ /* Check if the file/directory object is valid or not */ /*-----------------------------------------------------------------------*/ static FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */ void* obj /* Pointer to the object FIL/FATFS_DIR to check validity */ ) { FIL *fil = (FIL*)obj; /* Assuming offset of .fs and .id in the FIL/FATFS_DIR structure is identical */ if (!fil || !fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id || (disk_status(fil->fs->drv) & STA_NOINIT)) return FR_INVALID_OBJECT; ENTER_FF(fil->fs); /* Lock file system */ return FR_OK; } /*-------------------------------------------------------------------------- Public Functions ---------------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/ /* Mount/Unmount a Logical Drive */ /*-----------------------------------------------------------------------*/ FRESULT f_mount ( FATFS* fs, /* Pointer to the file system object (NULL:unmount)*/ const TCHAR* path, /* Logical drive number to be mounted/unmounted */ BYTE opt /* 0:Do not mount (delayed mount), 1:Mount immediately */ ) { FATFS *cfs; int vol; FRESULT res; const TCHAR *rp = path; vol = get_ldnumber(&rp); if (vol < 0) return FR_INVALID_DRIVE; cfs = FatFs[vol]; /* Pointer to fs object */ if (cfs) { #if _FS_LOCK clear_lock(cfs); #endif #if _FS_REENTRANT /* Discard sync object of the current volume */ if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR; #endif cfs->fs_type = 0; /* Clear old fs object */ } if (fs) { fs->fs_type = 0; /* Clear new fs object */ #if _FS_REENTRANT /* Create sync object for the new volume */ if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR; #endif } FatFs[vol] = fs; /* Register new fs object */ if (!fs || opt != 1) return FR_OK; /* Do not mount now, it will be mounted later */ res = find_volume(&fs, &path, 0); /* Force mounted the volume */ LEAVE_FF(fs, res); } /*-----------------------------------------------------------------------*/ /* Open or Create a File */ /*-----------------------------------------------------------------------*/ FRESULT f_open ( FIL* fp, /* Pointer to the blank file object */ const TCHAR* path, /* Pointer to the file name */ BYTE mode /* Access mode and file open mode flags */ ) { FRESULT res; FATFS_DIR dj; BYTE *dir; DEFINE_NAMEBUF; #if !_FS_READONLY DWORD dw, cl; #endif if (!fp) return FR_INVALID_OBJECT; fp->fs = 0; /* Clear file object */ /* Get logical drive number */ #if !_FS_READONLY mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW; res = find_volume(&dj.fs, &path, (BYTE)(mode & ~FA_READ)); #else mode &= FA_READ; res = find_volume(&dj.fs, &path, 0); #endif if (res == FR_OK) { INIT_BUF(dj); res = follow_path(&dj, path); /* Follow the file path */ dir = dj.dir; #if !_FS_READONLY /* R/W configuration */ if (res == FR_OK) { if (!dir) /* Default directory itself */ res = FR_INVALID_NAME; #if _FS_LOCK else res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); #endif } /* Create or Open a file */ if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { if (res != FR_OK) { /* No file, create new */ if (res == FR_NO_FILE) /* There is no file to open, create a new entry */ #if _FS_LOCK res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; #else res = dir_register(&dj); #endif mode |= FA_CREATE_ALWAYS; /* File is created */ dir = dj.dir; /* New entry */ } else { /* Any object is already existing */ if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or FATFS_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(); ST_DWORD(dir + DIR_CrtTime, dw);/* Set created time */ ST_DWORD(dir + DIR_WrtTime, dw);/* Set modified time */ dir[DIR_Attr] = 0; /* Reset attribute */ ST_DWORD(dir + DIR_FileSize, 0);/* Reset file size */ cl = ld_clust(dj.fs, dir); /* Get cluster chain */ st_clust(dir, 0); /* Reset cluster */ 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) { /* Following succeeded */ if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */ res = FR_NO_FILE; } else { if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */ res = FR_DENIED; } } } if (res == FR_OK) { if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */ mode |= FA__WRITTEN; fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */ fp->dir_ptr = dir; #if _FS_LOCK fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); if (!fp->lockid) res = FR_INT_ERR; #endif } #else /* R/O configuration */ if (res == FR_OK) { /* Follow succeeded */ dir = dj.dir; if (!dir) { /* Current directory itself */ res = FR_INVALID_NAME; } else { if (dir[DIR_Attr] & AM_DIR) /* It is a directory */ res = FR_NO_FILE; } } #endif FREE_BUF(); if (res == FR_OK) { fp->flag = mode; /* File access mode */ fp->err = 0; /* Clear error flag */ fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */ fp->fsize = LD_DWORD(dir + DIR_FileSize); /* File size */ fp->fptr = 0; /* File pointer */ fp->dsect = 0; #if _USE_FASTSEEK fp->cltbl = 0; /* Normal seek mode */ #endif fp->fs = dj.fs; /* Validate file object */ fp->id = fp->fs->id; } } LEAVE_FF(dj.fs, res); } /*-----------------------------------------------------------------------*/ /* Read File */ /*-----------------------------------------------------------------------*/ FRESULT f_read ( FIL* fp, /* Pointer to the file object */ void* buff, /* Pointer to data buffer */ UINT btr, /* Number of bytes to read */ UINT* br /* Pointer to number of bytes read */ ) { FRESULT res; DWORD clst, sect, remain; UINT rcnt, cc; BYTE csect, *rbuff = (BYTE*)buff; *br = 0; /* Clear read byte counter */ res = validate(fp); /* Check validity */ if (res != FR_OK) LEAVE_FF(fp->fs, res); if (fp->err) /* Check error */ LEAVE_FF(fp->fs, (FRESULT)fp->err); if (!(fp->flag & FA_READ)) /* Check access mode */ LEAVE_FF(fp->fs, FR_DENIED); remain = fp->fsize - fp->fptr; if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ for ( ; btr; /* Repeat until all data read */ rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ if (!csect) { /* On the cluster boundary? */ if (fp->fptr == 0) { /* On the top of the file? */ clst = fp->sclust; /* Follow from the origin */ } else { /* Middle or end of the file */ #if _USE_FASTSEEK if (fp->cltbl) clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ else #endif clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */ } if (clst < 2) ABORT(fp->fs, FR_INT_ERR); if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); fp->clust = clst; /* Update current cluster */ } sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ if (!sect) ABORT(fp->fs, FR_INT_ERR); sect += csect; cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */ if (cc) { /* Read maximum contiguous sectors directly */ if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ cc = fp->fs->csize - csect; if (disk_read(fp->fs->drv, rbuff, sect, cc) != RES_OK) ABORT(fp->fs, FR_DISK_ERR); #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ #if _FS_TINY if (fp->fs->wflag && fp->fs->winsect - sect < cc) mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs)); #else if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs)); #endif #endif rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ continue; } #if !_FS_TINY if (fp->dsect != sect) { /* Load data sector if not in cache */ #if !_FS_READONLY if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) ABORT(fp->fs, FR_DISK_ERR); fp->flag &= ~FA__DIRTY; } #endif if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */ ABORT(fp->fs, FR_DISK_ERR); } #endif fp->dsect = sect; } rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */ if (rcnt > btr) rcnt = btr; #if _FS_TINY if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */ ABORT(fp->fs, FR_DISK_ERR); mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ #else mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ #endif } LEAVE_FF(fp->fs, FR_OK); } #if !_FS_READONLY /*-----------------------------------------------------------------------*/ /* Write File */ /*-----------------------------------------------------------------------*/ FRESULT f_write ( FIL* fp, /* Pointer to the file object */ const void *buff, /* Pointer to the data to be written */ UINT btw, /* Number of bytes to write */ UINT* bw /* Pointer to number of bytes written */ ) { FRESULT res; DWORD clst, sect; UINT wcnt, cc; const BYTE *wbuff = (const BYTE*)buff; BYTE csect; bool need_sync = false; *bw = 0; /* Clear write byte counter */ res = validate(fp); /* Check validity */ if (res != FR_OK) LEAVE_FF(fp->fs, res); if (fp->err) /* Check error */ LEAVE_FF(fp->fs, (FRESULT)fp->err); if (!(fp->flag & FA_WRITE)) /* Check access mode */ LEAVE_FF(fp->fs, FR_DENIED); if (fp->fptr + btw < fp->fptr) btw = 0; /* File size cannot reach 4GB */ for ( ; btw; /* Repeat until all data written */ wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) { if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ if (!csect) { /* On the cluster boundary? */ if (fp->fptr == 0) { /* On the top of the file? */ clst = fp->sclust; /* Follow from the origin */ if (clst == 0) /* When no cluster is allocated, */ clst = create_chain(fp->fs, 0); /* Create a new cluster chain */ } else { /* Middle or end of the file */ #if _USE_FASTSEEK if (fp->cltbl) clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ else #endif clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */ } if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ if (clst == 1) ABORT(fp->fs, FR_INT_ERR); if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); fp->clust = clst; /* Update current cluster */ if (fp->sclust == 0) fp->sclust = clst; /* Set start cluster if the first write */ #if FLUSH_ON_NEW_CLUSTER // We do not need to flush for the first cluster if (fp->fptr != 0) { need_sync = true; } #endif } #if _FS_TINY if (fp->fs->winsect == fp->dsect && sync_window(fp->fs)) /* Write-back sector cache */ ABORT(fp->fs, FR_DISK_ERR); #else if (fp->flag & FA__DIRTY) { /* Write-back sector cache */ if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) ABORT(fp->fs, FR_DISK_ERR); fp->flag &= ~FA__DIRTY; } #endif sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ if (!sect) ABORT(fp->fs, FR_INT_ERR); sect += csect; cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */ if (cc) { /* Write maximum contiguous sectors directly */ if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ cc = fp->fs->csize - csect; if (disk_write(fp->fs->drv, wbuff, sect, cc) != RES_OK) ABORT(fp->fs, FR_DISK_ERR); #if _FS_MINIMIZE <= 2 #if _FS_TINY if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs)); fp->fs->wflag = 0; } #else if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs)); fp->flag &= ~FA__DIRTY; } #endif #endif wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ #if FLUSH_ON_NEW_SECTOR need_sync = true; #endif continue; } #if _FS_TINY if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */ if (sync_window(fp->fs)) ABORT(fp->fs, FR_DISK_ERR); fp->fs->winsect = sect; } #else if (fp->dsect != sect) { /* Fill sector cache with file data */ if (fp->fptr < fp->fsize && disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) ABORT(fp->fs, FR_DISK_ERR); } #endif fp->dsect = sect; } wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */ if (wcnt > btw) wcnt = btw; #if _FS_TINY if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */ ABORT(fp->fs, FR_DISK_ERR); mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ fp->fs->wflag = 1; #else mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ fp->flag |= FA__DIRTY; #endif } if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */ fp->flag |= FA__WRITTEN; /* Set file change flag */ if (need_sync) { f_sync (fp); } LEAVE_FF(fp->fs, FR_OK); } /*-----------------------------------------------------------------------*/ /* Synchronize the File */ /*-----------------------------------------------------------------------*/ FRESULT f_sync ( FIL* fp /* Pointer to the file object */ ) { FRESULT res; DWORD tm; BYTE *dir; res = validate(fp); /* Check validity of the object */ if (res == FR_OK) { if (fp->flag & FA__WRITTEN) { /* Is there any change to the file? */ #if !_FS_TINY if (fp->flag & FA__DIRTY) { /* Write-back cached data if needed */ if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) LEAVE_FF(fp->fs, FR_DISK_ERR); fp->flag &= ~FA__DIRTY; } #endif /* Update the directory entry */ res = move_window(fp->fs, fp->dir_sect); if (res == FR_OK) { dir = fp->dir_ptr; dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ ST_DWORD(dir + DIR_FileSize, fp->fsize); /* Update file size */ st_clust(dir, fp->sclust); /* Update start cluster */ tm = GET_FATTIME(); /* Update modified time */ ST_DWORD(dir + DIR_WrtTime, tm); ST_WORD(dir + DIR_LstAccDate, 0); fp->flag &= ~FA__WRITTEN; fp->fs->wflag = 1; res = sync_fs(fp->fs); } } } LEAVE_FF(fp->fs, res); } #endif /* !_FS_READONLY */ /*-----------------------------------------------------------------------*/ /* Close File */ /*-----------------------------------------------------------------------*/ FRESULT f_close ( FIL *fp /* Pointer to the file object to be closed */ ) { FRESULT res; #if !_FS_READONLY res = f_sync(fp); /* Flush cached data */ if (res == FR_OK) #endif { res = validate(fp); /* Lock volume */ if (res == FR_OK) { #if _FS_REENTRANT FATFS *fs = fp->fs; #endif #if _FS_LOCK res = dec_lock(fp->lockid); /* Decrement file open counter */ if (res == FR_OK) #endif fp->fs = 0; /* Invalidate file object */ #if _FS_REENTRANT unlock_fs(fs, FR_OK); /* Unlock volume */ #endif } } return res; } /*-----------------------------------------------------------------------*/ /* Change Current Directory or Current Drive, Get Current Directory */ /*-----------------------------------------------------------------------*/ #if _FS_RPATH >= 1 #if _VOLUMES >= 2 FRESULT f_chdrive ( const TCHAR* path /* Drive number */ ) { int vol; vol = get_ldnumber(&path); if (vol < 0) return FR_INVALID_DRIVE; CurrVol = (BYTE)vol; return FR_OK; } #endif FRESULT f_chdir ( const TCHAR* path /* Pointer to the directory path */ ) { FRESULT res; FATFS_DIR dj; DEFINE_NAMEBUF; /* Get logical drive number */ res = find_volume(&dj.fs, &path, 0); if (res == FR_OK) { INIT_BUF(dj); res = follow_path(&dj, path); /* Follow the path */ FREE_BUF(); if (res == FR_OK) { /* Follow completed */ if (!dj.dir) { dj.fs->cdir = dj.sclust; /* Start directory itself */ } else { if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */ dj.fs->cdir = ld_clust(dj.fs, dj.dir); else res = FR_NO_PATH; /* Reached but a file */ } } if (res == FR_NO_FILE) res = FR_NO_PATH; } LEAVE_FF(dj.fs, res); } #if _FS_RPATH >= 2 FRESULT f_getcwd ( TCHAR* buff, /* Pointer to the directory path */ UINT len /* Size of path */ ) { FRESULT res; FATFS_DIR dj; UINT i, n; DWORD ccl; TCHAR *tp; FILINFO fno; DEFINE_NAMEBUF; *buff = 0; /* Get logical drive number */ res = find_volume(&dj.fs, (const TCHAR**)&buff, 0); /* Get current volume */ if (res == FR_OK) { INIT_BUF(dj); i = len; /* Bottom of buffer (directory stack base) */ dj.sclust = dj.fs->cdir; /* Start to follow upper directory from current directory */ while ((ccl = dj.sclust) != 0) { /* Repeat while current directory is a sub-directory */ res = dir_sdi(&dj, 1); /* Get parent directory */ if (res != FR_OK) break; res = dir_read(&dj, 0); if (res != FR_OK) break; dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent directory */ res = dir_sdi(&dj, 0); if (res != FR_OK) break; do { /* Find the entry links to the child directory */ res = dir_read(&dj, 0); if (res != FR_OK) break; if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */ res = dir_next(&dj, 0); } while (res == FR_OK); if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ if (res != FR_OK) break; #if _USE_LFN fno.lfname = buff; fno.lfsize = i; #endif get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */ tp = fno.fname; #if _USE_LFN if (*buff) tp = buff; #endif for (n = 0; tp[n]; n++) ; if (i < n + 3) { res = FR_NOT_ENOUGH_CORE; break; } while (n) buff[--i] = tp[--n]; buff[--i] = '/'; } tp = buff; if (res == FR_OK) { #if _VOLUMES >= 2 *tp++ = '0' + CurrVol; /* Put drive number */ *tp++ = ':'; #endif if (i == len) { /* Root-directory */ *tp++ = '/'; } else { /* Sub-directroy */ do /* Add stacked path str */ *tp++ = buff[i++]; while (i < len); } } *tp = 0; FREE_BUF(); } LEAVE_FF(dj.fs, res); } #endif /* _FS_RPATH >= 2 */ #endif /* _FS_RPATH >= 1 */ #if _FS_MINIMIZE <= 2 /*-----------------------------------------------------------------------*/ /* Seek File R/W Pointer */ /*-----------------------------------------------------------------------*/ FRESULT f_lseek ( FIL* fp, /* Pointer to the file object */ DWORD ofs /* File pointer from top of file */ ) { FRESULT res; DWORD clst, bcs, nsect, ifptr; #if _USE_FASTSEEK DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl; #endif res = validate(fp); /* Check validity of the object */ if (res != FR_OK) LEAVE_FF(fp->fs, res); if (fp->err) /* Check error */ LEAVE_FF(fp->fs, (FRESULT)fp->err); #if _USE_FASTSEEK if (fp->cltbl) { /* Fast seek */ 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 */ { if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */ #if !_FS_READONLY && !(fp->flag & FA_WRITE) #endif ) ofs = fp->fsize; ifptr = fp->fptr; fp->fptr = nsect = 0; if (ofs) { bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */ if (ifptr > 0 && (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ ofs -= fp->fptr; clst = fp->clust; } else { /* When seek to back cluster, */ clst = fp->sclust; /* start from the first cluster */ #if !_FS_READONLY if (clst == 0) { /* If no cluster chain, create a new chain */ clst = create_chain(fp->fs, 0); if (clst == 1) ABORT(fp->fs, FR_INT_ERR); if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); fp->sclust = clst; } #endif fp->clust = clst; } if (clst != 0) { while (ofs > bcs) { /* Cluster following loop */ #if !_FS_READONLY if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */ if (clst == 0) { /* When disk gets full, clip file size */ ofs = bcs; break; } } else #endif clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */ if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR); fp->clust = clst; fp->fptr += bcs; ofs -= bcs; } fp->fptr += ofs; if (ofs % SS(fp->fs)) { nsect = clust2sect(fp->fs, clst); /* Current sector */ if (!nsect) ABORT(fp->fs, FR_INT_ERR); nsect += ofs / SS(fp->fs); } } } if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */ #if !_FS_TINY #if !_FS_READONLY if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) ABORT(fp->fs, FR_DISK_ERR); fp->flag &= ~FA__DIRTY; } #endif if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */ ABORT(fp->fs, FR_DISK_ERR); #endif fp->dsect = nsect; } #if !_FS_READONLY if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */ fp->fsize = fp->fptr; fp->flag |= FA__WRITTEN; } #endif } LEAVE_FF(fp->fs, res); } #if _FS_MINIMIZE <= 1 /*-----------------------------------------------------------------------*/ /* Create a Directory Object */ /*-----------------------------------------------------------------------*/ FRESULT f_opendir ( FATFS_DIR* dp, /* Pointer to directory object to create */ const TCHAR* path /* Pointer to the directory path */ ) { FRESULT res; FATFS* fs; DEFINE_NAMEBUF; if (!dp) return FR_INVALID_OBJECT; /* Get logical drive number */ res = find_volume(&fs, &path, 0); if (res == FR_OK) { dp->fs = fs; INIT_BUF(*dp); res = follow_path(dp, path); /* Follow the path to the directory */ FREE_BUF(); if (res == FR_OK) { /* Follow completed */ if (dp->dir) { /* It is not the origin directory itself */ if (dp->dir[DIR_Attr] & AM_DIR) /* The object is a sub directory */ dp->sclust = ld_clust(fs, dp->dir); else /* The object is a file */ res = FR_NO_PATH; } if (res == FR_OK) { dp->id = fs->id; res = dir_sdi(dp, 0); /* Rewind directory */ #if _FS_LOCK if (res == FR_OK) { if (dp->sclust) { dp->lockid = inc_lock(dp, 0); /* Lock the sub directory */ if (!dp->lockid) res = FR_TOO_MANY_OPEN_FILES; } else { dp->lockid = 0; /* Root directory need not to be locked */ } } #endif } } if (res == FR_NO_FILE) res = FR_NO_PATH; } if (res != FR_OK) dp->fs = 0; /* Invalidate the directory object if function faild */ LEAVE_FF(fs, res); } /*-----------------------------------------------------------------------*/ /* Close Directory */ /*-----------------------------------------------------------------------*/ FRESULT f_closedir ( FATFS_DIR *dp /* Pointer to the directory object to be closed */ ) { FRESULT res; res = validate(dp); if (res == FR_OK) { #if _FS_REENTRANT FATFS *fs = dp->fs; #endif #if _FS_LOCK if (dp->lockid) /* Decrement sub-directory open counter */ res = dec_lock(dp->lockid); if (res == FR_OK) #endif dp->fs = 0; /* Invalidate directory object */ #if _FS_REENTRANT unlock_fs(fs, FR_OK); /* Unlock volume */ #endif } return res; } /*-----------------------------------------------------------------------*/ /* Read Directory Entries in Sequence */ /*-----------------------------------------------------------------------*/ FRESULT f_readdir ( FATFS_DIR* dp, /* Pointer to the open directory object */ FILINFO* fno /* Pointer to file information to return */ ) { FRESULT res; DEFINE_NAMEBUF; res = validate(dp); /* Check validity of the object */ if (res == FR_OK) { if (!fno) { res = dir_sdi(dp, 0); /* Rewind the directory object */ } else { INIT_BUF(*dp); res = dir_read(dp, 0); /* Read an item */ if (res == FR_NO_FILE) { /* Reached end of directory */ dp->sect = 0; res = FR_OK; } if (res == FR_OK) { /* A valid entry is found */ get_fileinfo(dp, fno); /* Get the object information */ res = dir_next(dp, 0); /* Increment index for next */ if (res == FR_NO_FILE) { dp->sect = 0; res = FR_OK; } } FREE_BUF(); } } LEAVE_FF(dp->fs, res); } #if _USE_FIND /*-----------------------------------------------------------------------*/ /* Find next file */ /*-----------------------------------------------------------------------*/ FRESULT f_findnext ( FATFS_DIR* dp, /* Pointer to the open directory object */ FILINFO* fno /* Pointer to the file information structure */ ) { FRESULT res; for (;;) { res = f_readdir(dp, fno); /* Get a directory item */ if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */ #if _USE_LFN if (fno->lfname && pattern_matching(dp->pat, fno->lfname, 0, 0)) break; /* Test for LFN if exist */ #endif if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for SFN */ } return res; } /*-----------------------------------------------------------------------*/ /* Find first file */ /*-----------------------------------------------------------------------*/ FRESULT f_findfirst ( FATFS_DIR* dp, /* Pointer to the blank directory object */ FILINFO* fno, /* Pointer to the file information structure */ const TCHAR* path, /* Pointer to the directory to open */ const TCHAR* pattern /* Pointer to the matching pattern */ ) { FRESULT res; dp->pat = pattern; /* Save pointer to pattern string */ res = f_opendir(dp, path); /* Open the target directory */ if (res == FR_OK) res = f_findnext(dp, fno); /* Find the first item */ return res; } #endif /* _USE_FIND */ #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; FATFS_DIR dj; DEFINE_NAMEBUF; /* Get logical drive number */ res = find_volume(&dj.fs, &path, 0); if (res == FR_OK) { INIT_BUF(dj); res = follow_path(&dj, path); /* Follow the file path */ if (res == FR_OK) { /* Follow completed */ if (dj.dir) { /* Found an object */ if (fno) get_fileinfo(&dj, fno); } else { /* It is root directory */ res = FR_INVALID_NAME; } } FREE_BUF(); } LEAVE_FF(dj.fs, res); } #if !_FS_READONLY /*-----------------------------------------------------------------------*/ /* Get Number of Free Clusters */ /*-----------------------------------------------------------------------*/ FRESULT f_getfree ( const TCHAR* path, /* Path name of the logical drive number */ DWORD* nclst, /* Pointer to a variable to return number of free clusters */ FATFS** fatfs /* Pointer to return pointer to corresponding file system object */ ) { FRESULT res; FATFS *fs; DWORD nfree, clst, sect, stat; UINT i; BYTE fat, *p; /* Get logical drive number */ res = find_volume(fatfs, &path, 0); fs = *fatfs; if (res == FR_OK) { /* If free_clust is valid, return it without full cluster scan */ if (fs->free_clust <= fs->n_fatent - 2) { *nclst = fs->free_clust; } else { /* Get number of free clusters */ fat = fs->fs_type; nfree = 0; if (fat == FS_FAT12) { /* Sector unalighed entries: Search FAT via regular routine. */ clst = 2; do { stat = get_fat(fs, clst); if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } if (stat == 1) { res = FR_INT_ERR; break; } if (stat == 0) nfree++; } while (++clst < fs->n_fatent); } else { /* Sector alighed entries: Accelerate the FAT search. */ clst = fs->n_fatent; sect = fs->fatbase; i = 0; p = 0; do { if (!i) { res = move_window(fs, sect++); if (res != FR_OK) break; p = fs->win; i = SS(fs); } if (fat == FS_FAT16) { if (LD_WORD(p) == 0) nfree++; p += 2; i -= 2; } else { if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) nfree++; p += 4; i -= 4; } } while (--clst); } fs->free_clust = nfree; /* free_clust is valid */ fs->fsi_flag |= 1; /* FSInfo is to be updated */ *nclst = nfree; /* Return the free clusters */ } } LEAVE_FF(fs, res); } /*-----------------------------------------------------------------------*/ /* Truncate File */ /*-----------------------------------------------------------------------*/ FRESULT f_truncate ( FIL* fp /* Pointer to the file object */ ) { FRESULT res; DWORD ncl; res = validate(fp); /* Check validity of the object */ if (res == FR_OK) { if (fp->err) { /* Check error */ res = (FRESULT)fp->err; } else { if (!(fp->flag & FA_WRITE)) /* Check access mode */ res = FR_DENIED; } } if (res == FR_OK) { if (fp->fsize > fp->fptr) { fp->fsize = fp->fptr; /* Set file size to current R/W point */ fp->flag |= FA__WRITTEN; if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ res = remove_chain(fp->fs, fp->sclust); fp->sclust = 0; } else { /* When truncate a part of the file, remove remaining clusters */ ncl = get_fat(fp->fs, fp->clust); res = FR_OK; if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; if (ncl == 1) res = FR_INT_ERR; if (res == FR_OK && ncl < fp->fs->n_fatent) { res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF); if (res == FR_OK) res = remove_chain(fp->fs, ncl); } } #if !_FS_TINY if (res == FR_OK && (fp->flag & FA__DIRTY)) { if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) res = FR_DISK_ERR; else fp->flag &= ~FA__DIRTY; } #endif } if (res != FR_OK) fp->err = (FRESULT)res; } LEAVE_FF(fp->fs, res); } /*-----------------------------------------------------------------------*/ /* Delete a File or Directory */ /*-----------------------------------------------------------------------*/ FRESULT f_unlink ( const TCHAR* path /* Pointer to the file or directory path */ ) { FRESULT res; FATFS_DIR dj, sdj; BYTE *dir; DWORD dclst = 0; DEFINE_NAMEBUF; /* Get logical drive number */ res = find_volume(&dj.fs, &path, 1); if (res == FR_OK) { INIT_BUF(dj); res = follow_path(&dj, path); /* Follow the file path */ if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) res = FR_INVALID_NAME; /* Cannot remove dot entry */ #if _FS_LOCK if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open object */ #endif if (res == FR_OK) { /* The object is accessible */ dir = dj.dir; if (!dir) { res = FR_INVALID_NAME; /* Cannot remove the origin directory */ } else { if (dir[DIR_Attr] & AM_RDO) res = FR_DENIED; /* Cannot remove R/O object */ } if (res == FR_OK) { dclst = ld_clust(dj.fs, dir); if (dclst && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-directory ? */ #if _FS_RPATH if (dclst == dj.fs->cdir) { /* Is it the current directory? */ res = FR_DENIED; } else #endif { mem_cpy(&sdj, &dj, sizeof (FATFS_DIR)); /* Open the sub-directory */ sdj.sclust = dclst; res = dir_sdi(&sdj, 2); if (res == FR_OK) { res = dir_read(&sdj, 0); /* Read an item (excluding dot entries) */ if (res == FR_OK) res = FR_DENIED; /* Not empty? (cannot remove) */ if (res == FR_NO_FILE) res = FR_OK; /* Empty? (can remove) */ } } } } if (res == FR_OK) { res = dir_remove(&dj); /* Remove the directory entry */ if (res == FR_OK && dclst) /* Remove the cluster chain if exist */ res = remove_chain(dj.fs, dclst); if (res == FR_OK) res = sync_fs(dj.fs); } } FREE_BUF(); } LEAVE_FF(dj.fs, res); } /*-----------------------------------------------------------------------*/ /* Create a Directory */ /*-----------------------------------------------------------------------*/ FRESULT f_mkdir ( const TCHAR* path /* Pointer to the directory path */ ) { FRESULT res; FATFS_DIR dj; BYTE *dir, n; DWORD dsc, dcl, pcl, tm = GET_FATTIME(); DEFINE_NAMEBUF; /* Get logical drive number */ res = find_volume(&dj.fs, &path, 1); if (res == FR_OK) { INIT_BUF(dj); res = follow_path(&dj, path); /* Follow the file path */ if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */ if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) res = FR_INVALID_NAME; if (res == FR_NO_FILE) { /* Can create a new directory */ dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */ res = FR_OK; if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */ if (dcl == 1) res = FR_INT_ERR; if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; if (res == FR_OK) /* Flush FAT */ res = sync_window(dj.fs); if (res == FR_OK) { /* Initialize the new directory table */ dsc = clust2sect(dj.fs, dcl); dir = dj.fs->win; mem_set(dir, 0, SS(dj.fs)); mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */ dir[DIR_Name] = '.'; dir[DIR_Attr] = AM_DIR; ST_DWORD(dir + DIR_WrtTime, tm); st_clust(dir, dcl); mem_cpy(dir + SZ_DIRE, dir, SZ_DIRE); /* Create ".." entry */ dir[SZ_DIRE + 1] = '.'; pcl = dj.sclust; if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase) pcl = 0; st_clust(dir + SZ_DIRE, pcl); for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */ dj.fs->winsect = dsc++; dj.fs->wflag = 1; res = sync_window(dj.fs); if (res != FR_OK) break; mem_set(dir, 0, SS(dj.fs)); } } if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */ if (res != FR_OK) { remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */ } else { dir = dj.dir; dir[DIR_Attr] = AM_DIR; /* Attribute */ ST_DWORD(dir + DIR_WrtTime, tm); /* Created time */ st_clust(dir, dcl); /* Table start cluster */ dj.fs->wflag = 1; res = sync_fs(dj.fs); } } FREE_BUF(); } LEAVE_FF(dj.fs, res); } /*-----------------------------------------------------------------------*/ /* Change Attribute */ /*-----------------------------------------------------------------------*/ FRESULT f_chmod ( const TCHAR* path, /* Pointer to the file path */ BYTE attr, /* Attribute bits */ BYTE mask /* Attribute mask to change */ ) { FRESULT res; FATFS_DIR dj; BYTE *dir; DEFINE_NAMEBUF; res = find_volume(&dj.fs, &path, 1); /* Get logical drive number */ if (res == FR_OK) { INIT_BUF(dj); res = follow_path(&dj, path); /* Follow the file path */ FREE_BUF(); if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) res = FR_INVALID_NAME; if (res == FR_OK) { dir = dj.dir; if (!dir) { /* Is it a root directory? */ res = FR_INVALID_NAME; } else { /* File or sub directory */ mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ dir[DIR_Attr] = (attr & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ dj.fs->wflag = 1; res = sync_fs(dj.fs); } } } LEAVE_FF(dj.fs, res); } /*-----------------------------------------------------------------------*/ /* Rename File/Directory */ /*-----------------------------------------------------------------------*/ FRESULT f_rename ( const TCHAR* path_old, /* Pointer to the object to be renamed */ const TCHAR* path_new /* Pointer to the new name */ ) { FRESULT res; FATFS_DIR djo, djn; BYTE buf[21], *dir; DWORD dw; DEFINE_NAMEBUF; /* Get logical drive number of the source object */ res = find_volume(&djo.fs, &path_old, 1); if (res == FR_OK) { djn.fs = djo.fs; INIT_BUF(djo); res = follow_path(&djo, path_old); /* Check old object */ if (_FS_RPATH && res == FR_OK && (djo.fn[NSFLAG] & NS_DOT)) res = FR_INVALID_NAME; #if _FS_LOCK if (res == FR_OK) res = chk_lock(&djo, 2); #endif if (res == FR_OK) { /* Old object is found */ if (!djo.dir) { /* Is root dir? */ res = FR_NO_FILE; } else { mem_cpy(buf, djo.dir + DIR_Attr, 21); /* Save information about object except name */ mem_cpy(&djn, &djo, sizeof (FATFS_DIR)); /* Duplicate the directory object */ if (get_ldnumber(&path_new) >= 0) /* Snip drive number off and ignore it */ res = follow_path(&djn, path_new); /* and make sure if new object name is not conflicting */ else res = FR_INVALID_DRIVE; if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */ if (res == FR_NO_FILE) { /* It is a valid path and no name collision */ res = dir_register(&djn); /* Register the new entry */ if (res == FR_OK) { /* Start of critical section where any interruption can cause a cross-link */ dir = djn.dir; /* Copy information about object except name */ mem_cpy(dir + 13, buf + 2, 19); dir[DIR_Attr] = buf[0] | AM_ARC; djo.fs->wflag = 1; if ((dir[DIR_Attr] & AM_DIR) && djo.sclust != djn.sclust) { /* Update .. entry in the sub-directory if needed */ dw = clust2sect(djo.fs, ld_clust(djo.fs, dir)); if (!dw) { res = FR_INT_ERR; } else { res = move_window(djo.fs, dw); dir = djo.fs->win + SZ_DIRE * 1; /* Ptr to .. entry */ if (res == FR_OK && dir[1] == '.') { st_clust(dir, djn.sclust); djo.fs->wflag = 1; } } } if (res == FR_OK) { res = dir_remove(&djo); /* Remove old entry */ if (res == FR_OK) res = sync_fs(djo.fs); } /* End of critical section */ } } } } FREE_BUF(); } LEAVE_FF(djo.fs, res); } /*-----------------------------------------------------------------------*/ /* Change Timestamp */ /*-----------------------------------------------------------------------*/ FRESULT f_utime ( const TCHAR* path, /* Pointer to the file/directory name */ const FILINFO* fno /* Pointer to the time stamp to be set */ ) { FRESULT res; FATFS_DIR dj; BYTE *dir; DEFINE_NAMEBUF; /* Get logical drive number */ res = find_volume(&dj.fs, &path, 1); if (res == FR_OK) { INIT_BUF(dj); res = follow_path(&dj, path); /* Follow the file path */ FREE_BUF(); if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) res = FR_INVALID_NAME; if (res == FR_OK) { dir = dj.dir; if (!dir) { /* Root directory */ res = FR_INVALID_NAME; } else { /* File or sub-directory */ ST_WORD(dir + DIR_WrtTime, fno->ftime); ST_WORD(dir + DIR_WrtDate, fno->fdate); dj.fs->wflag = 1; res = sync_fs(dj.fs); } } } LEAVE_FF(dj.fs, res); } #endif /* !_FS_READONLY */ #endif /* _FS_MINIMIZE == 0 */ #endif /* _FS_MINIMIZE <= 1 */ #endif /* _FS_MINIMIZE <= 2 */ #if _USE_LABEL /*-----------------------------------------------------------------------*/ /* Get volume label */ /*-----------------------------------------------------------------------*/ FRESULT f_getlabel ( const TCHAR* path, /* Path name of the logical drive number */ TCHAR* label, /* Pointer to a buffer to return the volume label */ DWORD* vsn /* Pointer to a variable to return the volume serial number */ ) { FRESULT res; FATFS_DIR dj; UINT i, j; #if _USE_LFN && _LFN_UNICODE WCHAR w; #endif /* Get logical drive number */ res = find_volume(&dj.fs, &path, 0); /* Get volume label */ if (res == FR_OK && label) { dj.sclust = 0; /* Open root directory */ res = dir_sdi(&dj, 0); if (res == FR_OK) { res = dir_read(&dj, 1); /* Get an entry with AM_VOL */ if (res == FR_OK) { /* A volume label is exist */ #if _USE_LFN && _LFN_UNICODE i = j = 0; do { w = (i < 11) ? dj.dir[i++] : ' '; if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i])) w = w << 8 | dj.dir[i++]; label[j++] = ff_convert(w, 1); /* OEM -> Unicode */ } while (j < 11); #else mem_cpy(label, dj.dir, 11); #endif j = 11; do { label[j] = 0; if (!j) break; } while (label[--j] == ' '); } if (res == FR_NO_FILE) { /* No label, return nul string */ label[0] = 0; res = FR_OK; } } } /* Get volume serial number */ if (res == FR_OK && vsn) { res = move_window(dj.fs, dj.fs->volbase); if (res == FR_OK) { i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID; *vsn = LD_DWORD(&dj.fs->win[i]); } } LEAVE_FF(dj.fs, res); } #if !_FS_READONLY /*-----------------------------------------------------------------------*/ /* Set volume label */ /*-----------------------------------------------------------------------*/ FRESULT f_setlabel ( const TCHAR* label /* Pointer to the volume label to set */ ) { FRESULT res; FATFS_DIR dj; BYTE vn[11]; UINT i, j, sl; WCHAR w; DWORD tm; /* Get logical drive number */ res = find_volume(&dj.fs, &label, 1); if (res) LEAVE_FF(dj.fs, res); /* Create a volume label in directory form */ vn[0] = 0; for (sl = 0; label[sl]; sl++) ; /* Get name length */ for ( ; sl && label[sl - 1] == ' '; sl--) ; /* Remove trailing spaces */ if (sl) { /* Create volume label in directory form */ i = j = 0; do { #if _USE_LFN && _LFN_UNICODE w = ff_convert(ff_wtoupper(label[i++]), 0); #else w = (BYTE)label[i++]; if (IsDBCS1(w)) w = (j < 10 && i < sl && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0; #if _USE_LFN w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0); #else if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */ #ifdef _EXCVT if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */ #else if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */ #endif #endif #endif if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid characters for volume label */ LEAVE_FF(dj.fs, FR_INVALID_NAME); if (w >= 0x100) vn[j++] = (BYTE)(w >> 8); vn[j++] = (BYTE)w; } while (i < sl); while (j < 11) vn[j++] = ' '; /* Fill remaining name field */ if (vn[0] == DDEM) LEAVE_FF(dj.fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */ } /* Set volume label */ dj.sclust = 0; /* Open root directory */ res = dir_sdi(&dj, 0); if (res == FR_OK) { res = dir_read(&dj, 1); /* Get an entry with AM_VOL */ if (res == FR_OK) { /* A volume label is found */ if (vn[0]) { mem_cpy(dj.dir, vn, 11); /* Change the volume label name */ tm = GET_FATTIME(); ST_DWORD(dj.dir + DIR_WrtTime, tm); } else { dj.dir[0] = DDEM; /* Remove the volume label */ } dj.fs->wflag = 1; res = sync_fs(dj.fs); } else { /* No volume label is found or error */ if (res == FR_NO_FILE) { res = FR_OK; if (vn[0]) { /* Create volume label as new */ res = dir_alloc(&dj, 1); /* Allocate an entry for volume label */ if (res == FR_OK) { mem_set(dj.dir, 0, SZ_DIRE); /* Set volume label */ mem_cpy(dj.dir, vn, 11); dj.dir[DIR_Attr] = AM_VOL; tm = GET_FATTIME(); ST_DWORD(dj.dir + DIR_WrtTime, tm); dj.fs->wflag = 1; res = sync_fs(dj.fs); } } } } } LEAVE_FF(dj.fs, res); } #endif /* !_FS_READONLY */ #endif /* _USE_LABEL */ /*-----------------------------------------------------------------------*/ /* Forward data to the stream directly (available on only tiny cfg) */ /*-----------------------------------------------------------------------*/ #if _USE_FORWARD && _FS_TINY FRESULT f_forward ( FIL* fp, /* Pointer to the file object */ UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ UINT btf, /* Number of bytes to forward */ UINT* bf /* Pointer to number of bytes forwarded */ ) { FRESULT res; DWORD remain, clst, sect; UINT rcnt; BYTE csect; *bf = 0; /* Clear transfer byte counter */ res = validate(fp); /* Check validity of the object */ if (res != FR_OK) LEAVE_FF(fp->fs, res); if (fp->err) /* Check error */ LEAVE_FF(fp->fs, (FRESULT)fp->err); if (!(fp->flag & FA_READ)) /* Check access mode */ LEAVE_FF(fp->fs, FR_DENIED); remain = fp->fsize - fp->fptr; if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */ for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */ fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) { csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ if (!csect) { /* On the cluster boundary? */ clst = (fp->fptr == 0) ? /* On the top of the file? */ fp->sclust : get_fat(fp->fs, fp->clust); if (clst <= 1) ABORT(fp->fs, FR_INT_ERR); if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); fp->clust = clst; /* Update current cluster */ } } sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */ if (!sect) ABORT(fp->fs, FR_INT_ERR); sect += csect; if (move_window(fp->fs, sect) != FR_OK) /* Move sector window */ ABORT(fp->fs, FR_DISK_ERR); fp->dsect = sect; rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */ if (rcnt > btf) rcnt = btf; rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt); if (!rcnt) ABORT(fp->fs, FR_INT_ERR); } LEAVE_FF(fp->fs, FR_OK); } #endif /* _USE_FORWARD */ #if _USE_MKFS && !_FS_READONLY /*-----------------------------------------------------------------------*/ /* Create file system on the logical drive */ /*-----------------------------------------------------------------------*/ #define N_ROOTDIR 512 /* Number of root directory entries for FAT12/16 */ #define N_FATS 1 /* Number of FATs (1 or 2) */ FRESULT f_mkfs ( const TCHAR* path, /* Logical drive number */ BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */ UINT au /* Size of allocation unit in unit of byte or sector */ ) { static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0}; static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512}; int vol; BYTE fmt, md, sys, *tbl, pdrv, part; DWORD n_clst, vs, n, wsect; UINT i; DWORD b_vol, b_fat, b_dir, b_data; /* LBA */ DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */ FATFS *fs; DSTATUS stat; #if _USE_TRIM DWORD eb[2]; #endif /* Check mounted drive and clear work area */ if (sfd > 1) return FR_INVALID_PARAMETER; vol = get_ldnumber(&path); if (vol < 0) return FR_INVALID_DRIVE; fs = FatFs[vol]; if (!fs) return FR_NOT_ENABLED; fs->fs_type = 0; pdrv = LD2PD(vol); /* Physical drive */ part = LD2PT(vol); /* Partition (0:auto detect, 1-4:get from partition table)*/ /* Get disk statics */ stat = disk_initialize(pdrv); if (stat & STA_NOINIT) return FR_NOT_READY; if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; #if _MAX_SS != _MIN_SS /* Get disk sector size */ if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS || SS(fs) < _MIN_SS) return FR_DISK_ERR; #endif if (_MULTI_PARTITION && part) { /* Get partition information from partition table in the MBR */ if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR; if (LD_WORD(fs->win + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED; tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE]; if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */ b_vol = LD_DWORD(tbl + 8); /* Volume start sector */ n_vol = LD_DWORD(tbl + 12); /* Volume size */ } else { /* Create a partition in this function */ if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128) return FR_DISK_ERR; b_vol = (sfd) ? 0 : 63; /* Volume start sector */ n_vol -= b_vol; /* Volume size */ } if (au & (au - 1)) au = 0; if (!au) { /* AU auto selection */ vs = n_vol / (2000 / (SS(fs) / 512)); for (i = 0; vs < vst[i]; i++) ; au = cst[i]; } if (au >= _MIN_SS) au /= SS(fs); /* Number of sectors per cluster */ if (!au) au = 1; if (au > 128) au = 128; /* Pre-compute number of clusters and FAT sub-type */ n_clst = n_vol / au; fmt = FS_FAT12; if (n_clst >= MIN_FAT16) fmt = FS_FAT16; if (n_clst >= MIN_FAT32) fmt = FS_FAT32; /* Determine offset and size of FAT structure */ if (fmt == FS_FAT32) { n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs); n_rsv = 32; n_dir = 0; } else { n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4; n_fat = (n_fat + SS(fs) - 1) / SS(fs); n_rsv = 1; n_dir = (DWORD)N_ROOTDIR * SZ_DIRE / SS(fs); } b_fat = b_vol + n_rsv; /* FAT area start sector */ b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */ b_data = b_dir + n_dir; /* Data area start sector */ if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */ /* Align data start sector to erase block boundary (for flash memory media) */ if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1; n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */ n = (n - b_data) / N_FATS; if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */ n_rsv += n; b_fat += n; } else { /* FAT12/16: Expand FAT size */ n_fat += n; } /* Determine number of clusters and final check of validity of the FAT sub-type */ n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au; if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16) || (fmt == FS_FAT32 && n_clst < MIN_FAT32)) return FR_MKFS_ABORTED; /* Determine system ID in the partition table */ if (fmt == FS_FAT32) { sys = 0x0C; /* FAT32X */ } else { if (fmt == FS_FAT12 && n_vol < 0x10000) { sys = 0x01; /* FAT12(<65536) */ } else { sys = (n_vol < 0x10000) ? 0x04 : 0x06; /* FAT16(<65536) : FAT12/16(>=65536) */ } } if (_MULTI_PARTITION && part) { /* Update system ID in the partition table */ tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE]; tbl[4] = sys; if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to teh MBR */ return FR_DISK_ERR; md = 0xF8; } else { if (sfd) { /* No partition table (SFD) */ md = 0xF0; } else { /* Create partition table (FDISK) */ mem_set(fs->win, 0, SS(fs)); tbl = fs->win + MBR_Table; /* Create partition table for single partition in the drive */ tbl[1] = 1; /* Partition start head */ tbl[2] = 1; /* Partition start sector */ tbl[3] = 0; /* Partition start cylinder */ tbl[4] = sys; /* System type */ tbl[5] = 254; /* Partition end head */ n = (b_vol + n_vol) / 63 / 255; tbl[6] = (BYTE)(n >> 2 | 63); /* Partition end sector */ tbl[7] = (BYTE)n; /* End cylinder */ ST_DWORD(tbl + 8, 63); /* Partition start in LBA */ ST_DWORD(tbl + 12, n_vol); /* Partition size in LBA */ ST_WORD(fs->win + BS_55AA, 0xAA55); /* MBR signature */ if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR */ return FR_DISK_ERR; md = 0xF8; } } /* Create BPB in the VBR */ tbl = fs->win; /* Clear sector */ mem_set(tbl, 0, SS(fs)); mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */ i = SS(fs); /* Sector size */ ST_WORD(tbl + BPB_BytsPerSec, i); tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */ ST_WORD(tbl + BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */ tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */ i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of root directory entries */ ST_WORD(tbl + BPB_RootEntCnt, i); if (n_vol < 0x10000) { /* Number of total sectors */ ST_WORD(tbl + BPB_TotSec16, n_vol); } else { ST_DWORD(tbl + BPB_TotSec32, n_vol); } tbl[BPB_Media] = md; /* Media descriptor */ ST_WORD(tbl + BPB_SecPerTrk, 63); /* Number of sectors per track */ ST_WORD(tbl + BPB_NumHeads, 255); /* Number of heads */ ST_DWORD(tbl + BPB_HiddSec, b_vol); /* Hidden sectors */ n = GET_FATTIME(); /* Use current time as VSN */ if (fmt == FS_FAT32) { ST_DWORD(tbl + BS_VolID32, n); /* VSN */ ST_DWORD(tbl + BPB_FATSz32, n_fat); /* Number of sectors per FAT */ ST_DWORD(tbl + BPB_RootClus, 2); /* Root directory start cluster (2) */ ST_WORD(tbl + BPB_FSInfo, 1); /* FSINFO record offset (VBR + 1) */ ST_WORD(tbl + BPB_BkBootSec, 6); /* Backup boot record offset (VBR + 6) */ tbl[BS_DrvNum32] = 0x80; /* Drive number */ tbl[BS_BootSig32] = 0x29; /* Extended boot signature */ mem_cpy(tbl + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ } else { ST_DWORD(tbl + BS_VolID, n); /* VSN */ ST_WORD(tbl + BPB_FATSz16, n_fat); /* Number of sectors per FAT */ tbl[BS_DrvNum] = 0x80; /* Drive number */ tbl[BS_BootSig] = 0x29; /* Extended boot signature */ mem_cpy(tbl + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ } ST_WORD(tbl + BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */ if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */ return FR_DISK_ERR; if (fmt == FS_FAT32) /* Write it to the backup VBR if needed (VBR + 6) */ disk_write(pdrv, tbl, b_vol + 6, 1); /* Initialize FAT area */ wsect = b_fat; for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */ mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */ n = md; /* Media descriptor byte */ if (fmt != FS_FAT32) { n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00; ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT12/16) */ } else { n |= 0xFFFFFF00; ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT32) */ ST_DWORD(tbl + 4, 0xFFFFFFFF); ST_DWORD(tbl + 8, 0x0FFFFFFF); /* Reserve cluster #2 for root directory */ } if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) return FR_DISK_ERR; mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */ for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */ if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) return FR_DISK_ERR; } } /* Initialize root directory */ i = (fmt == FS_FAT32) ? au : (UINT)n_dir; do { if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) return FR_DISK_ERR; } while (--i); #if _USE_TRIM /* Erase data area if needed */ { eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1; disk_ioctl(pdrv, CTRL_TRIM, eb); } #endif /* Create FSINFO if needed */ if (fmt == FS_FAT32) { ST_DWORD(tbl + FSI_LeadSig, 0x41615252); ST_DWORD(tbl + FSI_StrucSig, 0x61417272); ST_DWORD(tbl + FSI_Free_Count, n_clst - 1); /* Number of free clusters */ ST_DWORD(tbl + FSI_Nxt_Free, 2); /* Last allocated cluster# */ ST_WORD(tbl + BS_55AA, 0xAA55); disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR + 1) */ disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR + 7) */ } return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR; } #if _MULTI_PARTITION /*-----------------------------------------------------------------------*/ /* Create partition table on the physical drive */ /*-----------------------------------------------------------------------*/ FRESULT f_fdisk ( BYTE pdrv, /* Physical drive number */ const DWORD szt[], /* Pointer to the size table for each partitions */ void* work /* Pointer to the working buffer */ ) { UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl; BYTE s_hd, e_hd, *p, *buf = (BYTE*)work; DSTATUS stat; DWORD sz_disk, sz_part, s_part; stat = disk_initialize(pdrv); if (stat & STA_NOINIT) return FR_NOT_READY; if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR; /* Determine CHS in the table regardless of the drive geometry */ for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ; if (n == 256) n--; e_hd = n - 1; sz_cyl = 63 * n; tot_cyl = sz_disk / sz_cyl; /* Create partition table */ mem_set(buf, 0, _MAX_SS); p = buf + MBR_Table; b_cyl = 0; for (i = 0; i < 4; i++, p += SZ_PTE) { p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl; if (!p_cyl) continue; s_part = (DWORD)sz_cyl * b_cyl; sz_part = (DWORD)sz_cyl * p_cyl; if (i == 0) { /* Exclude first track of cylinder 0 */ s_hd = 1; s_part += 63; sz_part -= 63; } else { s_hd = 0; } e_cyl = b_cyl + p_cyl - 1; if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER; /* Set partition table */ p[1] = s_hd; /* Start head */ p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */ p[3] = (BYTE)b_cyl; /* Start cylinder */ p[4] = 0x06; /* System type (temporary setting) */ p[5] = e_hd; /* End head */ p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */ p[7] = (BYTE)e_cyl; /* End cylinder */ ST_DWORD(p + 8, s_part); /* Start sector in LBA */ ST_DWORD(p + 12, sz_part); /* Partition size */ /* Next partition */ b_cyl += p_cyl; } ST_WORD(p, 0xAA55); /* Write it to the MBR */ return (disk_write(pdrv, buf, 0, 1) != RES_OK || disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK; } #endif /* _MULTI_PARTITION */ #endif /* _USE_MKFS && !_FS_READONLY */ #if _USE_STRFUNC /*-----------------------------------------------------------------------*/ /* Get a string from the file */ /*-----------------------------------------------------------------------*/ TCHAR* f_gets ( TCHAR* buff, /* Pointer to the string buffer to read */ int len, /* Size of string buffer (characters) */ FIL* fp /* Pointer to the file object */ ) { int n = 0; TCHAR c, *p = buff; BYTE s[2]; UINT rc; while (n < len - 1) { /* Read characters until buffer gets filled */ #if _USE_LFN && _LFN_UNICODE #if _STRF_ENCODE == 3 /* Read a character in UTF-8 */ f_read(fp, s, 1, &rc); if (rc != 1) break; c = s[0]; if (c >= 0x80) { if (c < 0xC0) continue; /* Skip stray trailer */ if (c < 0xE0) { /* Two-byte sequence */ f_read(fp, s, 1, &rc); if (rc != 1) break; c = (c & 0x1F) << 6 | (s[0] & 0x3F); if (c < 0x80) c = '?'; } else { if (c < 0xF0) { /* Three-byte sequence */ f_read(fp, s, 2, &rc); if (rc != 2) break; c = c << 12 | (s[0] & 0x3F) << 6 | (s[1] & 0x3F); if (c < 0x800) c = '?'; } else { /* Reject four-byte sequence */ c = '?'; } } } #elif _STRF_ENCODE == 2 /* Read a character in UTF-16BE */ f_read(fp, s, 2, &rc); if (rc != 2) break; c = s[1] + (s[0] << 8); #elif _STRF_ENCODE == 1 /* Read a character in UTF-16LE */ f_read(fp, s, 2, &rc); if (rc != 2) break; c = s[0] + (s[1] << 8); #else /* Read a character in ANSI/OEM */ f_read(fp, s, 1, &rc); if (rc != 1) break; c = s[0]; if (IsDBCS1(c)) { f_read(fp, s, 1, &rc); if (rc != 1) break; c = (c << 8) + s[0]; } c = ff_convert(c, 1); /* OEM -> Unicode */ if (!c) c = '?'; #endif #else /* Read a character without conversion */ f_read(fp, s, 1, &rc); if (rc != 1) break; c = s[0]; #endif if (_USE_STRFUNC == 2 && c == '\r') continue; /* Strip '\r' */ *p++ = c; n++; if (c == '\n') break; /* Break on EOL */ } *p = 0; return n ? buff : 0; /* When no data read (eof or error), return with error. */ } #if !_FS_READONLY #include <stdarg.h> /*-----------------------------------------------------------------------*/ /* Put a character to the file */ /*-----------------------------------------------------------------------*/ typedef struct { FIL* fp; int idx, nchr; BYTE buf[64]; } putbuff; static void putc_bfd ( putbuff* pb, TCHAR c ) { UINT bw; int i; if (_USE_STRFUNC == 2 && c == '\n') /* LF -> CRLF conversion */ putc_bfd(pb, '\r'); i = pb->idx; /* Buffer write index (-1:error) */ if (i < 0) return; #if _USE_LFN && _LFN_UNICODE #if _STRF_ENCODE == 3 /* Write a character in UTF-8 */ if (c < 0x80) { /* 7-bit */ pb->buf[i++] = (BYTE)c; } else { if (c < 0x800) { /* 11-bit */ pb->buf[i++] = (BYTE)(0xC0 | c >> 6); } else { /* 16-bit */ pb->buf[i++] = (BYTE)(0xE0 | c >> 12); pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F)); } pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F)); } #elif _STRF_ENCODE == 2 /* Write a character in UTF-16BE */ pb->buf[i++] = (BYTE)(c >> 8); pb->buf[i++] = (BYTE)c; #elif _STRF_ENCODE == 1 /* Write a character in UTF-16LE */ pb->buf[i++] = (BYTE)c; pb->buf[i++] = (BYTE)(c >> 8); #else /* Write a character in ANSI/OEM */ c = ff_convert(c, 0); /* Unicode -> OEM */ if (!c) c = '?'; if (c >= 0x100) pb->buf[i++] = (BYTE)(c >> 8); pb->buf[i++] = (BYTE)c; #endif #else /* Write a character without conversion */ pb->buf[i++] = (BYTE)c; #endif if (i >= (int)(sizeof pb->buf) - 3) { /* Write buffered characters to the file */ f_write(pb->fp, pb->buf, (UINT)i, &bw); i = (bw == (UINT)i) ? 0 : -1; } pb->idx = i; pb->nchr++; } int f_putc ( TCHAR c, /* A character to be output */ FIL* fp /* Pointer to the file object */ ) { putbuff pb; UINT nw; pb.fp = fp; /* Initialize output buffer */ pb.nchr = pb.idx = 0; putc_bfd(&pb, c); /* Put a character */ if ( pb.idx >= 0 /* Flush buffered characters to the file */ && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK && (UINT)pb.idx == nw) return pb.nchr; return EOF; } /*-----------------------------------------------------------------------*/ /* Put a string to the file */ /*-----------------------------------------------------------------------*/ int f_puts ( const TCHAR* str, /* Pointer to the string to be output */ FIL* fp /* Pointer to the file object */ ) { putbuff pb; UINT nw; pb.fp = fp; /* Initialize output buffer */ pb.nchr = pb.idx = 0; while (*str) /* Put the string */ putc_bfd(&pb, *str++); if ( pb.idx >= 0 /* Flush buffered characters to the file */ && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK && (UINT)pb.idx == nw) return pb.nchr; return EOF; } /*-----------------------------------------------------------------------*/ /* Put a formatted string to the file */ /*-----------------------------------------------------------------------*/ int f_printf ( FIL* fp, /* Pointer to the file object */ const TCHAR* fmt, /* Pointer to the format string */ ... /* Optional arguments... */ ) { va_list arp; BYTE f, r; UINT nw, i, j, w; DWORD v; TCHAR c, d, s[16], *p; putbuff pb; pb.fp = fp; /* Initialize output buffer */ pb.nchr = pb.idx = 0; va_start(arp, fmt); for (;;) { c = *fmt++; if (c == 0) break; /* End of string */ if (c != '%') { /* Non escape character */ putc_bfd(&pb, c); continue; } w = f = 0; c = *fmt++; if (c == '0') { /* Flag: '0' padding */ f = 1; c = *fmt++; } else { if (c == '-') { /* Flag: left justified */ f = 2; c = *fmt++; } } while (IsDigit(c)) { /* Precision */ w = w * 10 + c - '0'; c = *fmt++; } if (c == 'l' || c == 'L') { /* Prefix: Size is long int */ f |= 4; c = *fmt++; } if (!c) break; d = c; if (IsLower(d)) d -= 0x20; switch (d) { /* Type is... */ case 'S' : /* String */ p = va_arg(arp, TCHAR*); for (j = 0; p[j]; j++) ; if (!(f & 2)) { while (j++ < w) putc_bfd(&pb, ' '); } while (*p) putc_bfd(&pb, *p++); while (j++ < w) putc_bfd(&pb, ' '); continue; case 'C' : /* Character */ putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue; case 'B' : /* Binary */ r = 2; break; case 'O' : /* Octal */ r = 8; break; case 'D' : /* Signed decimal */ case 'U' : /* Unsigned decimal */ r = 10; break; case 'X' : /* Hexdecimal */ r = 16; break; default: /* Unknown type (pass-through) */ putc_bfd(&pb, c); continue; } /* Get an argument and put it in numeral */ v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int)); if (d == 'D' && (v & 0x80000000)) { v = 0 - v; f |= 8; } i = 0; do { d = (TCHAR)(v % r); v /= r; if (d > 9) d += (c == 'x') ? 0x27 : 0x07; s[i++] = d + '0'; } while (v && i < sizeof s / sizeof s[0]); if (f & 8) s[i++] = '-'; j = i; d = (f & 1) ? '0' : ' '; while (!(f & 2) && j++ < w) putc_bfd(&pb, d); do putc_bfd(&pb, s[--i]); while (i); while (j++ < w) putc_bfd(&pb, d); } va_end(arp); if ( pb.idx >= 0 /* Flush buffered characters to the file */ && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK && (UINT)pb.idx == nw) return pb.nchr; return EOF; } #endif /* !_FS_READONLY */ #endif /* _USE_STRFUNC */