/*----------------------------------------------------------------------------/ / FatFs - Generic FAT file system module R0.12b / /-----------------------------------------------------------------------------/ / / Copyright (C) 2016, ChaN, all right reserved. / / FatFs module is an open source software. Redistribution and use of FatFs in / source and binary forms, with or without modification, are permitted provided / that the following condition is met: / 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 #include "ff.h" /* Declarations of FatFs API */ #include "diskio.h" /* Declarations of device I/O functions */ /*-------------------------------------------------------------------------- Module Private Definitions ---------------------------------------------------------------------------*/ #if _FATFS != 68020 /* Revision ID */ #error Wrong include file (ff.h). #endif #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); } /* 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 /* 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 */ #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 lock controls */ #if _FS_LOCK != 0 #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) */ DWORD ofs; /* Object ID 3, directory offset */ 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, \ 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,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 != 0 #error Cannot enable LFN 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 != 0 /* 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 */ /* File attribute bits (internal use) */ #define AM_VOL 0x08 /* Volume label */ #define AM_LFN 0x0F /* LFN entry */ #define AM_MASK 0x3F /* Mask of defined bits */ /* File access control and file status flags (internal use) */ #define FA_SEEKEND 0x20 /* Seek to end of the file on file open */ #define FA_MODIFIED 0x40 /* File has been modified */ #define FA_DIRTY 0x80 /* FIL.buf[] needs to be written-back */ /* 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 */ #define NS_NOLFN 0x40 /* Do not find LFN */ #define NS_NONAME 0x80 /* Not followed */ /* Limits and boundaries (differ from specs but correct for real DOS/Windows) */ #define MAX_FAT12 0xFF5 /* Maximum number of FAT12 clusters */ #define MAX_FAT16 0xFFF5 /* Maximum number of FAT16 clusters */ #define MAX_FAT32 0xFFFFFF5 /* Maximum number of FAT32 clusters */ #define MAX_EXFAT 0x7FFFFFFD /* Maximum number of exFAT clusters (limited by implementation) */ #define MAX_DIR 0x200000 /* Maximum size of FAT directory */ #define MAX_DIR_EX 0x10000000 /* Maximum size of exFAT directory */ /* 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-byte) */ #define BS_OEMName 3 /* OEM name (8-byte) */ #define BPB_BytsPerSec 11 /* Sector size [byte] (WORD) */ #define BPB_SecPerClus 13 /* Cluster size [sector] (BYTE) */ #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (WORD) */ #define BPB_NumFATs 16 /* Number of FATs (BYTE) */ #define BPB_RootEntCnt 17 /* Size of root directory area for FAT12/16 [entry] (WORD) */ #define BPB_TotSec16 19 /* Volume size (16-bit) [sector] (WORD) */ #define BPB_Media 21 /* Media descriptor byte (BYTE) */ #define BPB_FATSz16 22 /* FAT size (16-bit) [sector] (WORD) */ #define BPB_SecPerTrk 24 /* Track size for int13h [sector] (WORD) */ #define BPB_NumHeads 26 /* Number of heads for int13h (WORD) */ #define BPB_HiddSec 28 /* Volume offset from top of the drive (DWORD) */ #define BPB_TotSec32 32 /* Volume size (32-bit) [sector] (DWORD) */ #define BS_DrvNum 36 /* Physical drive number for int13h (BYTE) */ #define BS_NTres 37 /* Error flag (BYTE) */ #define BS_BootSig 38 /* Extended boot signature (BYTE) */ #define BS_VolID 39 /* Volume serial number (DWORD) */ #define BS_VolLab 43 /* Volume label string (8-byte) */ #define BS_FilSysType 54 /* File system type string (8-byte) */ #define BS_BootCode 62 /* Boot code (448-byte) */ #define BS_55AA 510 /* Signature word (WORD) */ #define BPB_FATSz32 36 /* FAT32: FAT size [sector] (DWORD) */ #define BPB_ExtFlags32 40 /* FAT32: Extended flags (WORD) */ #define BPB_FSVer32 42 /* FAT32: File system version (WORD) */ #define BPB_RootClus32 44 /* FAT32: Root directory cluster (DWORD) */ #define BPB_FSInfo32 48 /* FAT32: Offset of FSINFO sector (WORD) */ #define BPB_BkBootSec32 50 /* FAT32: Offset of backup boot sector (WORD) */ #define BS_DrvNum32 64 /* FAT32: Physical drive number for int13h (BYTE) */ #define BS_NTres32 65 /* FAT32: Error flag (BYTE) */ #define BS_BootSig32 66 /* FAT32: Extended boot signature (BYTE) */ #define BS_VolID32 67 /* FAT32: Volume serial number (DWORD) */ #define BS_VolLab32 71 /* FAT32: Volume label string (8-byte) */ #define BS_FilSysType32 82 /* FAT32: File system type string (8-byte) */ #define BS_BootCode32 90 /* FAT32: Boot code (420-byte) */ #define BPB_ZeroedEx 11 /* exFAT: MBZ field (53-byte) */ #define BPB_VolOfsEx 64 /* exFAT: Volume offset from top of the drive [sector] (QWORD) */ #define BPB_TotSecEx 72 /* exFAT: Volume size [sector] (QWORD) */ #define BPB_FatOfsEx 80 /* exFAT: FAT offset from top of the volume [sector] (DWORD) */ #define BPB_FatSzEx 84 /* exFAT: FAT size [sector] (DWORD) */ #define BPB_DataOfsEx 88 /* exFAT: Data offset from top of the volume [sector] (DWORD) */ #define BPB_NumClusEx 92 /* exFAT: Number of clusters (DWORD) */ #define BPB_RootClusEx 96 /* exFAT: Root directory cluster (DWORD) */ #define BPB_VolIDEx 100 /* exFAT: Volume serial number (DWORD) */ #define BPB_FSVerEx 104 /* exFAT: File system version (WORD) */ #define BPB_VolFlagEx 106 /* exFAT: Volume flags (BYTE) */ #define BPB_ActFatEx 107 /* exFAT: Active FAT flags (BYTE) */ #define BPB_BytsPerSecEx 108 /* exFAT: Log2 of sector size in byte (BYTE) */ #define BPB_SecPerClusEx 109 /* exFAT: Log2 of cluster size in sector (BYTE) */ #define BPB_NumFATsEx 110 /* exFAT: Number of FATs (BYTE) */ #define BPB_DrvNumEx 111 /* exFAT: Physical drive number for int13h (BYTE) */ #define BPB_PercInUseEx 112 /* exFAT: Percent in use (BYTE) */ #define BPB_RsvdEx 113 /* exFAT: Reserved (7-byte) */ #define BS_BootCodeEx 120 /* exFAT: Boot code (390-byte) */ #define FSI_LeadSig 0 /* FAT32 FSI: Leading signature (DWORD) */ #define FSI_StrucSig 484 /* FAT32 FSI: Structure signature (DWORD) */ #define FSI_Free_Count 488 /* FAT32 FSI: Number of free clusters (DWORD) */ #define FSI_Nxt_Free 492 /* FAT32 FSI: Last allocated cluster (DWORD) */ #define MBR_Table 446 /* MBR: Offset of partition table in the MBR */ #define SZ_PTE 16 /* MBR: Size of a partition table entry */ #define PTE_Boot 0 /* MBR PTE: Boot indicator */ #define PTE_StHead 1 /* MBR PTE: Start head */ #define PTE_StSec 2 /* MBR PTE: Start sector */ #define PTE_StCyl 3 /* MBR PTE: Start cylinder */ #define PTE_System 4 /* MBR PTE: System ID */ #define PTE_EdHead 5 /* MBR PTE: End head */ #define PTE_EdSec 6 /* MBR PTE: End sector */ #define PTE_EdCyl 7 /* MBR PTE: End cylinder */ #define PTE_StLba 8 /* MBR PTE: Start in LBA */ #define PTE_SizLba 12 /* MBR PTE: Size in LBA */ #define DIR_Name 0 /* Short file name (11-byte) */ #define DIR_Attr 11 /* Attribute (BYTE) */ #define DIR_NTres 12 /* Lower case flag (BYTE) */ #define DIR_CrtTime10 13 /* Created time sub-second (BYTE) */ #define DIR_CrtTime 14 /* Created time (DWORD) */ #define DIR_LstAccDate 18 /* Last accessed date (WORD) */ #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (WORD) */ #define DIR_ModTime 22 /* Modified time (DWORD) */ #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (WORD) */ #define DIR_FileSize 28 /* File size (DWORD) */ #define LDIR_Ord 0 /* LFN entry order and LLE flag (BYTE) */ #define LDIR_Attr 11 /* LFN attribute (BYTE) */ #define LDIR_Type 12 /* LFN type (BYTE) */ #define LDIR_Chksum 13 /* Checksum of the SFN entry (BYTE) */ #define LDIR_FstClusLO 26 /* Must be zero (WORD) */ #define XDIR_Type 0 /* Type of exFAT directory entry (BYTE) */ #define XDIR_NumLabel 1 /* Number of volume label characters (BYTE) */ #define XDIR_Label 2 /* Volume label (11-WORD) */ #define XDIR_CaseSum 4 /* Sum of case conversion table (DWORD) */ #define XDIR_NumSec 1 /* Number of secondary entries (BYTE) */ #define XDIR_SetSum 2 /* Sum of the set of directory entries (WORD) */ #define XDIR_Attr 4 /* File attribute (WORD) */ #define XDIR_CrtTime 8 /* Created time (DWORD) */ #define XDIR_ModTime 12 /* Modified time (DWORD) */ #define XDIR_AccTime 16 /* Last accessed time (DWORD) */ #define XDIR_CrtTime10 20 /* Created time subsecond (BYTE) */ #define XDIR_ModTime10 21 /* Modified time subsecond (BYTE) */ #define XDIR_CrtTZ 22 /* Created timezone (BYTE) */ #define XDIR_ModTZ 23 /* Modified timezone (BYTE) */ #define XDIR_AccTZ 24 /* Last accessed timezone (BYTE) */ #define XDIR_GenFlags 33 /* Gneral secondary flags (WORD) */ #define XDIR_NumName 35 /* Number of file name characters (BYTE) */ #define XDIR_NameHash 36 /* Hash of file name (WORD) */ #define XDIR_ValidFileSize 40 /* Valid file size (QWORD) */ #define XDIR_FstClus 52 /* First cluster of the file data (DWORD) */ #define XDIR_FileSize 56 /* File/Directory size (QWORD) */ #define SZDIRE 32 /* Size of a directory entry */ #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */ #define DDEM 0xE5 /* Deleted directory entry mark set to DIR_Name[0] */ #define RDDEM 0x05 /* Replacement of the character collides with DDEM */ /*-------------------------------------------------------------------------- Module Private Work Area ---------------------------------------------------------------------------*/ /* Remark: Variables here without initial value shall be guaranteed zero/null / at start-up. If not, either the linker or start-up routine being used is / not compliance with 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 != 0 && _VOLUMES >= 2 static BYTE CurrVol; /* Current drive */ #endif #if _FS_LOCK != 0 static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */ #endif #if _USE_LFN == 0 /* Non-LFN configuration */ #define DEF_NAMBUF #define INIT_NAMBUF(fs) #define FREE_NAMBUF() #else #if _MAX_LFN < 12 || _MAX_LFN > 255 #error Wrong _MAX_LFN setting #endif #if _USE_LFN == 1 /* LFN enabled with static working buffer */ #if _FS_EXFAT static BYTE DirBuf[SZDIRE*19]; /* Directory entry block scratchpad buffer (19 entries in size) */ #endif static WCHAR LfnBuf[_MAX_LFN+1]; /* LFN enabled with static working buffer */ #define DEF_NAMBUF #define INIT_NAMBUF(fs) #define FREE_NAMBUF() #elif _USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */ #if _FS_EXFAT #define DEF_NAMBUF WCHAR lbuf[_MAX_LFN+1]; BYTE dbuf[SZDIRE*19]; #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; } #define FREE_NAMBUF() #else #define DEF_NAMBUF WCHAR lbuf[_MAX_LFN+1]; #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; } #define FREE_NAMBUF() #endif #elif _USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */ #if _FS_EXFAT #define DEF_NAMBUF WCHAR *lfn; #define INIT_NAMBUF(fs) { lfn = ff_memalloc((_MAX_LFN+1)*2 + SZDIRE*19); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; (fs)->dirbuf = (BYTE*)(lfn+_MAX_LFN+1); } #define FREE_NAMBUF() ff_memfree(lfn) #else #define DEF_NAMBUF WCHAR *lfn; #define INIT_NAMBUF(fs) { lfn = ff_memalloc((_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; } #define FREE_NAMBUF() ff_memfree(lfn) #endif #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 ---------------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/ /* Load/Store multi-byte word in the FAT structure */ /*-----------------------------------------------------------------------*/ static WORD ld_word (const BYTE* ptr) /* Load a 2-byte little-endian word */ { WORD rv; rv = ptr[1]; rv = rv << 8 | ptr[0]; return rv; } static DWORD ld_dword (const BYTE* ptr) /* Load a 4-byte little-endian word */ { DWORD rv; rv = ptr[3]; rv = rv << 8 | ptr[2]; rv = rv << 8 | ptr[1]; rv = rv << 8 | ptr[0]; return rv; } #if _FS_EXFAT static QWORD ld_qword (const BYTE* ptr) /* Load an 8-byte little-endian word */ { QWORD rv; rv = ptr[7]; rv = rv << 8 | ptr[6]; rv = rv << 8 | ptr[5]; rv = rv << 8 | ptr[4]; rv = rv << 8 | ptr[3]; rv = rv << 8 | ptr[2]; rv = rv << 8 | ptr[1]; rv = rv << 8 | ptr[0]; return rv; } #endif #if !_FS_READONLY static void st_word (BYTE* ptr, WORD val) /* Store a 2-byte word in little-endian */ { *ptr++ = (BYTE)val; val >>= 8; *ptr++ = (BYTE)val; } static void st_dword (BYTE* ptr, DWORD val) /* Store a 4-byte word in little-endian */ { *ptr++ = (BYTE)val; val >>= 8; *ptr++ = (BYTE)val; val >>= 8; *ptr++ = (BYTE)val; val >>= 8; *ptr++ = (BYTE)val; } #if _FS_EXFAT static void st_qword (BYTE* ptr, QWORD val) /* Store an 8-byte word in little-endian */ { *ptr++ = (BYTE)val; val >>= 8; *ptr++ = (BYTE)val; val >>= 8; *ptr++ = (BYTE)val; val >>= 8; *ptr++ = (BYTE)val; val >>= 8; *ptr++ = (BYTE)val; val >>= 8; *ptr++ = (BYTE)val; val >>= 8; *ptr++ = (BYTE)val; val >>= 8; *ptr++ = (BYTE)val; } #endif #endif /* !_FS_READONLY */ /*-----------------------------------------------------------------------*/ /* 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 (cnt) { do *d++ = *s++; while (--cnt); } } /* Fill memory block */ static void mem_set (void* dst, int val, UINT cnt) { BYTE *d = (BYTE*)dst; do *d++ = (BYTE)val; while (--cnt); } /* Compare memory block */ static int mem_cmp (const void* dst, const void* src, UINT cnt) { /* ZR:same, NZ:different */ const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; int r = 0; do { r = *d++ - *s++; } while (--cnt && r == 0); return r; } /* Check if chr is contained in the string */ static int chk_chr (const char* str, int chr) { /* NZ:contained, ZR:not contained */ while (*str && *str != chr) str++; return *str; } #if _FS_REENTRANT /*-----------------------------------------------------------------------*/ /* Request/Release grant to access the volume */ /*-----------------------------------------------------------------------*/ 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_TIMEOUT) { ff_rel_grant(fs->sobj); } } #endif #if _FS_LOCK != 0 /*-----------------------------------------------------------------------*/ /* File lock control functions */ /*-----------------------------------------------------------------------*/ static FRESULT chk_lock ( /* Check if the file can be accessed */ const 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->obj.fs && /* Check if the object matched with an open object */ Files[i].clu == dp->obj.sclust && Files[i].ofs == dp->dptr) break; } else { /* Blank entry */ be = 1; } } if (i == _FS_LOCK) { /* The object is not opened */ return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */ } /* The object has been opened. Reject any open against writing file and all write mode open */ return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK; } static int enq_lock (void) /* Check if an entry is available for a new object */ { UINT i; for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; return (i == _FS_LOCK) ? 0 : 1; } static UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */ DIR* dp, /* Directory object pointing the file to register or increment */ int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ ) { UINT i; for (i = 0; i < _FS_LOCK; i++) { /* Find the object */ if (Files[i].fs == dp->obj.fs && Files[i].clu == dp->obj.sclust && Files[i].ofs == dp->dptr) 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->obj.fs; Files[i].clu = dp->obj.sclust; Files[i].ofs = dp->dptr; 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..) */ ) { FRESULT res; if (--i < _FS_LOCK) { /* Shift index number origin from 0 */ WORD n = Files[i].ctr; if (n == 0x100) n = 0; /* If write mode open, delete the entry */ if (n > 0) n--; /* Decrement read mode open count */ Files[i].ctr = n; if (n == 0) 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 */ const FATFS *fs ) { for (UINT i = 0; i < _FS_LOCK; i++) { if (Files[i].fs == fs) Files[i].fs = 0; } } #endif /* _FS_LOCK != 0 */ /*-----------------------------------------------------------------------*/ /* Move/Flush disk access window in the file system object */ /*-----------------------------------------------------------------------*/ #if !_FS_READONLY static FRESULT sync_window ( /* Returns FR_OK or FR_DISK_ERROR */ FATFS* fs /* File system object */ ) {; FRESULT res = FR_OK; if (fs->wflag) { /* Write back the sector if it is dirty */ DWORD 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 (UINT 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 ( /* Returns FR_OK or FR_DISK_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; } #if !_FS_READONLY /*-----------------------------------------------------------------------*/ /* Synchronize file system and strage device */ /*-----------------------------------------------------------------------*/ 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_clst); st_dword(fs->win + FSI_Nxt_Free, fs->last_clst); /* 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# */ /*-----------------------------------------------------------------------*/ static DWORD clust2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */ const 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 */ /*-----------------------------------------------------------------------*/ static DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */ _FDID* obj, /* Corresponding object */ DWORD clst /* Cluster number to get the value */ ) { DWORD val; FATFS *fs = obj->fs; 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 : { UINT bc = (UINT)clst; bc += bc / 2; if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; UINT 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; val = ld_word(fs->win + clst * 2 % SS(fs)); break; case FS_FAT32 : if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break; val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF; break; #if _FS_EXFAT case FS_EXFAT : if (obj->objsize) { DWORD cofs = clst - obj->sclust; /* Offset from start cluster */ DWORD clen = (DWORD)((obj->objsize - 1) / SS(fs)) / fs->csize; /* Number of clusters - 1 */ if (obj->stat == 2) { /* Is there no valid chain on the FAT? */ if (cofs <= clen) { val = (cofs == clen) ? 0x7FFFFFFF : clst + 1; /* Generate the value */ break; } } if (obj->stat == 3 && cofs < obj->n_cont) { /* Is it in the contiguous part? */ val = clst + 1; /* Generate the value */ break; } if (obj->stat != 2) { /* Get value from FAT if FAT chain is valid */ if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break; val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF; break; } } /* go next */ #endif default: val = 1; /* Internal error */ } } return val; } #if !_FS_READONLY /*-----------------------------------------------------------------------*/ /* FAT access - Change value of a FAT entry */ /*-----------------------------------------------------------------------*/ static FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */ FATFS* fs, /* Corresponding file system object */ DWORD clst, /* FAT index number (cluster number) to be changed */ DWORD val /* New value to be set to the entry */ ) { FRESULT res = FR_INT_ERR; if (clst >= 2 && clst < fs->n_fatent) { /* Check if in valid range */ switch (fs->fs_type) { case FS_FAT12 : /* Bitfield items */ { UINT bc = (UINT)clst; bc += bc / 2; res = move_window(fs, fs->fatbase + (bc / SS(fs))); if (res != FR_OK) break; BYTE *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 : /* WORD aligned items */ res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); if (res != FR_OK) break; st_word(fs->win + clst * 2 % SS(fs), (WORD)val); fs->wflag = 1; break; case FS_FAT32 : /* DWORD aligned items */ #if _FS_EXFAT case FS_EXFAT : #endif res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); if (res != FR_OK) break; if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) { val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000); } st_dword(fs->win + clst * 4 % SS(fs), val); fs->wflag = 1; break; } } return res; } #endif /* !_FS_READONLY */ #if _FS_EXFAT && !_FS_READONLY /*-----------------------------------------------------------------------*/ /* exFAT: Accessing FAT and Allocation Bitmap */ /*-----------------------------------------------------------------------*/ /*---------------------------------------------*/ /* exFAT: Find a contiguous free cluster block */ /*---------------------------------------------*/ static DWORD find_bitmap ( /* 0:No free cluster, 2..:Free cluster found, 0xFFFFFFFF:Disk error */ FATFS* fs, /* File system object */ DWORD clst, /* Cluster number to scan from */ DWORD ncl /* Number of contiguous clusters to find (1..) */ ) { BYTE bm, bv; DWORD val, scl, ctr; clst -= 2; /* The first bit in the bitmap corresponds to cluster #2 */ if (clst >= fs->n_fatent - 2) clst = 0; scl = val = clst; ctr = 0; for (;;) { if (move_window(fs, fs->database + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF; UINT i = val / 8 % SS(fs); bm = 1 << (val % 8); do { do { bv = fs->win[i] & bm; bm <<= 1; /* Get bit value */ if (++val >= fs->n_fatent - 2) { /* Next cluster (with wrap-around) */ val = 0; bm = 0; i = 4096; } if (!bv) { /* Is it a free cluster? */ if (++ctr == ncl) return scl + 2; /* Check run length */ } else { scl = val; ctr = 0; /* Encountered a live cluster, restart to scan */ } if (val == clst) return 0; /* All cluster scanned? */ } while (bm); bm = 1; } while (++i < SS(fs)); } } /*------------------------------------*/ /* exFAT: Set/Clear a block of bitmap */ /*------------------------------------*/ static FRESULT change_bitmap ( FATFS* fs, /* File system object */ DWORD clst, /* Cluster number to change from */ DWORD ncl, /* Number of clusters to be changed */ int bv /* bit value to be set (0 or 1) */ ) { BYTE bm; UINT i; DWORD sect; clst -= 2; /* The first bit corresponds to cluster #2 */ sect = fs->database + clst / 8 / SS(fs); /* Sector address */ i = clst / 8 % SS(fs); /* Byte offset in the sector */ bm = 1 << (clst % 8); /* Bit mask in the byte */ for (;;) { if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR; do { do { if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR; /* Is the bit expected value? */ fs->win[i] ^= bm; /* Flip the bit */ fs->wflag = 1; if (--ncl == 0) return FR_OK; /* All bits processed? */ } while (bm <<= 1); /* Next bit */ bm = 1; } while (++i < SS(fs)); /* Next byte */ i = 0; } } /*---------------------------------------------*/ /* Complement contiguous part of the FAT chain */ /*---------------------------------------------*/ static FRESULT fill_fat_chain ( _FDID* obj /* Pointer to the corresponding object */ ) { FRESULT res; if (obj->stat == 3) { /* Has the object been changed 'fragmented'? */ DWORD cl, n; for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) { /* Create cluster chain on the FAT */ res = put_fat(obj->fs, cl, cl + 1); if (res != FR_OK) return res; } obj->stat = 0; /* Change status 'FAT chain is valid' */ } return FR_OK; } #endif /* _FS_EXFAT && !_FS_READONLY */ #if !_FS_READONLY /*-----------------------------------------------------------------------*/ /* FAT handling - Remove a cluster chain */ /*-----------------------------------------------------------------------*/ static FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */ _FDID* obj, /* Corresponding object */ DWORD clst, /* Cluster to remove a chain from */ DWORD pclst /* Previous cluster of clst (0:an entire chain) */ ) { FRESULT res; FATFS *fs = obj->fs; #if _FS_EXFAT || _USE_TRIM DWORD scl = clst, ecl = clst; #endif #if _USE_TRIM DWORD rt[2]; #endif if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Check if in valid range */ /* Mark the previous cluster 'EOC' on the FAT if it exists */ if (pclst && (!_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) { res = put_fat(fs, pclst, 0xFFFFFFFF); if (res != FR_OK) return res; } /* Remove the chain */ do { DWORD nxt = get_fat(obj, clst); /* Get cluster status */ if (nxt == 0) break; /* Empty cluster? */ if (nxt == 1) return FR_INT_ERR; /* Internal error? */ if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error? */ if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) { res = put_fat(fs, clst, 0); /* Mark the cluster 'free' on the FAT */ if (res != FR_OK) return res; } if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */ fs->free_clst++; fs->fsi_flag |= 1; } #if _FS_EXFAT || _USE_TRIM if (ecl + 1 == nxt) { /* Is next cluster contiguous? */ ecl = nxt; } else { /* End of contiguous cluster block */ #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { res = change_bitmap(fs, scl, ecl - scl + 1, 0); /* Mark the cluster block 'free' on the bitmap */ if (res != FR_OK) return res; } #endif #if _USE_TRIM rt[0] = clust2sect(fs, scl); /* Start sector */ rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ disk_ioctl(fs->drv, CTRL_TRIM, rt); /* Inform device the block can be erased */ #endif scl = ecl = nxt; } #endif clst = nxt; /* Next cluster */ } while (clst < fs->n_fatent); /* Repeat while not the last link */ #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { if (pclst == 0) { /* Does object have no chain? */ obj->stat = 0; /* Change the object status 'initial' */ } else { if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) { /* Did the chain got contiguous? */ obj->stat = 2; /* Change the object status 'contiguous' */ } } } #endif return FR_OK; } /*-----------------------------------------------------------------------*/ /* FAT handling - Stretch a chain or Create a new chain */ /*-----------------------------------------------------------------------*/ static DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ _FDID* obj, /* Corresponding object */ DWORD clst /* Cluster# to stretch, 0:Create a new chain */ ) { DWORD cs, ncl, scl; FRESULT res; FATFS *fs = obj->fs; if (clst == 0) { /* Create a new chain */ scl = fs->last_clst; /* Get suggested cluster to start at */ if (scl == 0 || scl >= fs->n_fatent) scl = 1; } else { /* Stretch current chain */ cs = get_fat(obj, 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; } #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { /* At the exFAT */ ncl = find_bitmap(fs, scl, 1); /* Find a free cluster */ if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl; /* No free cluster or hard error? */ res = change_bitmap(fs, ncl, 1, 1); /* Mark the cluster 'in use' */ if (res == FR_INT_ERR) return 1; if (res == FR_DISK_ERR) return 0xFFFFFFFF; if (clst == 0) { /* Is it a new chain? */ obj->stat = 2; /* Set status 'contiguous chain' */ } else { /* This is a stretched chain */ if (obj->stat == 2 && ncl != scl + 1) { /* Is the chain got fragmented? */ obj->n_cont = scl - obj->sclust; /* Set size of the contiguous part */ obj->stat = 3; /* Change status 'just fragmented' */ } } } else #endif { /* At the FAT12/16/32 */ 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(obj, ncl); /* Get the cluster status */ if (cs == 0) break; /* Found a free cluster */ if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* An error occurred */ if (ncl == scl) return 0; /* No free cluster */ } } if (_FS_EXFAT && fs->fs_type == FS_EXFAT && obj->stat == 2) { /* Is it a contiguous chain? */ res = FR_OK; /* FAT does not need to be written */ } else { res = put_fat(fs, ncl, 0xFFFFFFFF); /* Mark the new cluster 'EOC' */ if (res == FR_OK && clst) { res = put_fat(fs, clst, ncl); /* Link it from the previous one if needed */ } } if (res == FR_OK) { /* Update FSINFO if function succeeded. */ fs->last_clst = ncl; if (fs->free_clst < fs->n_fatent - 2) fs->free_clst--; fs->fsi_flag |= 1; } else { ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; /* Failed. Create error status */ } return ncl; /* Return new cluster number or error status */ } #endif /* !_FS_READONLY */ #if _USE_FASTSEEK /*-----------------------------------------------------------------------*/ /* FAT handling - Convert offset into cluster with link map table */ /*-----------------------------------------------------------------------*/ static DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ FIL* fp, /* Pointer to the file object */ FSIZE_t ofs /* File offset to be converted to cluster# */ ) { DWORD cl, *tbl; FATFS *fs = fp->obj.fs; tbl = fp->cltbl + 1; /* Top of CLMT */ cl = (DWORD)(ofs / SS(fs) / fs->csize); /* Cluster order from top of the file */ for (;;) { DWORD ncl = *tbl++; /* Number of cluters in the fragment */ if (ncl == 0) 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 */ DIR* dp, /* Pointer to directory object */ DWORD ofs /* Offset of directory table */ ) { DWORD clst; FATFS *fs = dp->obj.fs; if (ofs >= (DWORD)((_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) { /* Check range of offset and alignment */ return FR_INT_ERR; } dp->dptr = ofs; /* Set current offset */ clst = dp->obj.sclust; /* Table start cluster (0:root) */ if (clst == 0 && fs->fs_type >= FS_FAT32) { /* Replace cluster# 0 with root cluster# */ clst = fs->dirbase; if (_FS_EXFAT) dp->obj.stat = 0; /* exFAT: Root dir has an FAT chain */ } if (clst == 0) { /* Static table (root-directory in FAT12/16) */ if (ofs / SZDIRE >= fs->n_rootdir) return FR_INT_ERR; /* Is index out of range? */ dp->sect = fs->dirbase; } else { /* Dynamic table (sub-directory or root-directory in FAT32+) */ DWORD csz = (DWORD)fs->csize * SS(fs); /* Bytes per cluster */ while (ofs >= csz) { /* Follow cluster chain */ clst = get_fat(&dp->obj, clst); /* Get next cluster */ if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Reached to end of table or internal error */ ofs -= csz; } dp->sect = clust2sect(fs, clst); } dp->clust = clst; /* Current cluster# */ if (!dp->sect) return FR_INT_ERR; dp->sect += ofs / SS(fs); /* Sector# of the directory entry */ dp->dir = fs->win + (ofs % SS(fs)); /* Pointer to the entry in the win[] */ 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 */ DIR* dp, /* Pointer to the directory object */ int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ ) { DWORD ofs; FATFS *fs = dp->obj.fs; ofs = dp->dptr + SZDIRE; /* Next entry */ if (!dp->sect || ofs >= (DWORD)((_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR)) return FR_NO_FILE; /* Report EOT when offset has reached max value */ if (ofs % SS(fs) == 0) { /* Sector changed? */ dp->sect++; /* Next sector */ if (!dp->clust) { /* Static table */ if (ofs / SZDIRE >= fs->n_rootdir) { /* Report EOT if it reached end of static table */ dp->sect = 0; return FR_NO_FILE; } } else { /* Dynamic table */ if ((ofs / SS(fs) & (fs->csize - 1)) == 0) { /* Cluster changed? */ DWORD clst = get_fat(&dp->obj, dp->clust); /* Get next cluster */ if (clst <= 1) return FR_INT_ERR; /* Internal error */ if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ if (clst >= fs->n_fatent) { /* Reached end of dynamic table */ #if !_FS_READONLY UINT n; if (!stretch) { /* If no stretch, report EOT */ dp->sect = 0; return FR_NO_FILE; } clst = create_chain(&dp->obj, dp->clust); /* Allocate a cluster */ if (clst == 0) return FR_DENIED; /* No free cluster */ if (clst == 1) return FR_INT_ERR; /* Internal error */ if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ /* Clean-up the stretched table */ if (_FS_EXFAT) dp->obj.stat |= 4; /* The directory needs to be updated */ if (sync_window(fs) != FR_OK) return FR_DISK_ERR; /* Flush disk access window */ mem_set(fs->win, 0, SS(fs)); /* Clear window buffer */ for (n = 0, fs->winsect = clust2sect(fs, clst); n < fs->csize; n++, fs->winsect++) { /* Fill the new cluster with 0 */ fs->wflag = 1; if (sync_window(fs) != FR_OK) return FR_DISK_ERR; } fs->winsect -= n; /* Restore window offset */ #else if (!stretch) dp->sect = 0; /* If no stretch, report EOT (this is to suppress warning) */ dp->sect = 0; return FR_NO_FILE; /* Report EOT */ #endif } dp->clust = clst; /* Initialize data for new cluster */ dp->sect = clust2sect(fs, clst); } } } dp->dptr = ofs; /* Current entry */ dp->dir = fs->win + ofs % SS(fs); /* Pointer to the entry in the win[] */ return FR_OK; } #if !_FS_READONLY /*-----------------------------------------------------------------------*/ /* Directory handling - Reserve a block of directory entries */ /*-----------------------------------------------------------------------*/ static FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */ DIR* dp, /* Pointer to the directory object */ UINT nent /* Number of contiguous entries to allocate */ ) { FRESULT res; FATFS *fs = dp->obj.fs; res = dir_sdi(dp, 0); if (res == FR_OK) { UINT n = 0; do { res = move_window(fs, dp->sect); if (res != FR_OK) break; #if _FS_EXFAT if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) { #else if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) { #endif 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); } while (res == FR_OK); /* Next entry with table stretch enabled */ } if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */ return res; } #endif /* !_FS_READONLY */ /*-----------------------------------------------------------------------*/ /* FAT: Directory handling - Load/Store start cluster number */ /*-----------------------------------------------------------------------*/ static DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */ const FATFS* fs, /* Pointer to the fs object */ const BYTE* dir /* Pointer to the key 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 ( const FATFS* fs, /* Pointer to the fs object */ BYTE* dir, /* Pointer to the key entry */ DWORD cl /* Value to be set */ ) { st_word(dir + DIR_FstClusLO, (WORD)cl); if (fs->fs_type == FS_FAT32) { st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16)); } } #endif #if _USE_LFN != 0 /*------------------------------------------------------------------------*/ /* FAT-LFN: LFN handling */ /*------------------------------------------------------------------------*/ 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 */ /*--------------------------------------------------------*/ /* FAT-LFN: Compare a part of file name with an LFN entry */ /*--------------------------------------------------------*/ static int cmp_lfn ( /* 1:matched, 0:not matched */ const WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */ const BYTE* dir /* Pointer to the directory entry containing the part of LFN */ ) { UINT s; WCHAR wc; if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */ size_t 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 */ WCHAR 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]) return 0; /* Last segment matched but different length */ return 1; /* The part of LFN matched */ } #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 || _USE_LABEL || _FS_EXFAT /*-----------------------------------------------------*/ /* FAT-LFN: Pick a part of file name from an LFN entry */ /*-----------------------------------------------------*/ static int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */ WCHAR* lfnbuf, /* Pointer to the LFN working buffer */ const BYTE* dir /* Pointer to the LFN entry */ ) { UINT i, s; WCHAR wc; 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 */ WCHAR 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 */ } #endif #if !_FS_READONLY /*-----------------------------------------*/ /* FAT-LFN: Create an entry of LFN entries */ /*-----------------------------------------*/ static void put_lfn ( const WCHAR* lfn, /* Pointer to the LFN */ BYTE* dir, /* Pointer to the LFN entry to be created */ BYTE ord, /* LFN order (1-20) */ BYTE sum /* Checksum of the corresponding SFN */ ) { UINT 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); size_t i = (ord - 1) * 13; /* Get offset in the LFN working buffer */ s = wc = 0; do { if (wc != 0xFFFF) wc = lfn[i++]; /* Get an effective character */ st_word(dir + LfnOfs[s], wc); /* Put it */ if (wc == 0) wc = 0xFFFF; /* Padding characters for left locations */ } while (++s < 13); if (wc == 0xFFFF || !lfn[i]) ord |= LLEF; /* Last LFN part is the start of LFN sequence */ dir[LDIR_Ord] = ord; /* Set the LFN order */ } #endif /* !_FS_READONLY */ #endif /* _USE_LFN != 0 */ #if _USE_LFN != 0 && !_FS_READONLY /*-----------------------------------------------------------------------*/ /* FAT-LFN: Create a Numbered SFN */ /*-----------------------------------------------------------------------*/ 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]; UINT i; size_t j; mem_cpy(dst, src, 11); if (seq > 5) { /* In case of many collisions, generate a hash number instead of sequential number */ DWORD sr = seq; while (*lfn) { /* Create a CRC */ WCHAR 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 { BYTE 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 /* _USE_LFN != 0 && !_FS_READONLY */ #if _USE_LFN != 0 /*-----------------------------------------------------------------------*/ /* FAT-LFN: Calculate checksum of an SFN entry */ /*-----------------------------------------------------------------------*/ 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 /* _USE_LFN != 0 */ #if _FS_EXFAT /*-----------------------------------------------------------------------*/ /* exFAT: Checksum */ /*-----------------------------------------------------------------------*/ static WORD xdir_sum ( /* Get checksum of the directoly block */ const BYTE* dir /* Directory entry block to be calculated */ ) { UINT i, szblk; WORD sum; szblk = (dir[XDIR_NumSec] + 1) * SZDIRE; for (i = sum = 0; i < szblk; i++) { if (i == XDIR_SetSum) { /* Skip sum field */ i++; } else { sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i]; } } return sum; } static WORD xname_sum ( /* Get check sum (to be used as hash) of the name */ const WCHAR* name /* File name to be calculated */ ) { WCHAR chr; WORD sum = 0; while ((chr = *name++) != 0) { chr = ff_wtoupper(chr); /* File name needs to be ignored case */ sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF); sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8); } return sum; } #if !_FS_READONLY && _USE_MKFS static DWORD xsum32 ( BYTE dat, /* Data to be sumed */ DWORD sum /* Previous value */ ) { sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat; return sum; } #endif #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 /*------------------------------------------------------*/ /* exFAT: Get object information from a directory block */ /*------------------------------------------------------*/ static void get_xdir_info ( BYTE* dirb, /* Pointer to the direcotry entry block 85+C0+C1s */ FILINFO* fno /* Buffer to store the extracted file information */ ) { UINT di, si; #if !_LFN_UNICODE UINT nc; #endif /* Get file name */ #if _LFN_UNICODE if (dirb[XDIR_NumName] <= _MAX_LFN) { for (si = SZDIRE * 2, di = 0; di < dirb[XDIR_NumName]; si += 2, di++) { if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */ fno->fname[di] = ld_word(dirb + si); /* Get a character */ } } else { di = 0; /* Buffer overflow and inaccessible object */ } #else for (si = SZDIRE * 2, di = nc = 0; nc < dirb[XDIR_NumName]; si += 2, nc++) { if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */ WCHAR w = ld_word(dirb + si); /* Get a character */ w = ff_convert(w, 0); /* Unicode -> OEM */ if (w == 0) { di = 0; break; } /* Could not be converted and inaccessible object */ if (_DF1S && w >= 0x100) { /* Put 1st byte if it is a DBC (always false at SBCS cfg) */ fno->fname[di++] = (char)(w >> 8); } if (di >= _MAX_LFN) { di = 0; break; } /* Buffer overflow and inaccessible object */ fno->fname[di++] = (char)w; } #endif if (di == 0) fno->fname[di++] = '?'; /* Inaccessible object? */ fno->fname[di] = 0; /* Terminate file name */ fno->altname[0] = 0; /* No SFN */ fno->fattrib = dirb[XDIR_Attr]; /* Attribute */ fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(dirb + XDIR_FileSize); /* Size */ fno->ftime = ld_word(dirb + XDIR_ModTime + 0); /* Time */ fno->fdate = ld_word(dirb + XDIR_ModTime + 2); /* Date */ } #endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */ /*-----------------------------------*/ /* exFAT: Get a directry entry block */ /*-----------------------------------*/ static FRESULT load_xdir ( /* FR_INT_ERR: invalid entry block */ DIR* dp /* Pointer to the reading direcotry object pointing the 85 entry */ ) { FRESULT res; UINT i, nent; BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the on-memory direcotry entry block 85+C0+C1s */ /* Load 85 entry */ res = move_window(dp->obj.fs, dp->sect); if (res != FR_OK) return res; if (dp->dir[XDIR_Type] != 0x85) return FR_INT_ERR; mem_cpy(dirb, dp->dir, SZDIRE); nent = dirb[XDIR_NumSec] + 1; /* Load C0 entry */ res = dir_next(dp, 0); if (res != FR_OK) return res; res = move_window(dp->obj.fs, dp->sect); if (res != FR_OK) return res; if (dp->dir[XDIR_Type] != 0xC0) return FR_INT_ERR; mem_cpy(dirb + SZDIRE, dp->dir, SZDIRE); /* Load C1 entries */ if (nent < 3 || nent > 19) return FR_NO_FILE; i = SZDIRE * 2; nent *= SZDIRE; do { res = dir_next(dp, 0); if (res != FR_OK) return res; res = move_window(dp->obj.fs, dp->sect); if (res != FR_OK) return res; if (dp->dir[XDIR_Type] != 0xC1) return FR_INT_ERR; mem_cpy(dirb + i, dp->dir, SZDIRE); i += SZDIRE; } while (i < nent); /* Sanity check */ if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR; return FR_OK; } #if !_FS_READONLY || _FS_RPATH != 0 /*------------------------------------------------*/ /* exFAT: Load the object's directory entry block */ /*------------------------------------------------*/ static FRESULT load_obj_dir ( DIR* dp, /* Blank directory object to be used to access containing direcotry */ const _FDID* obj /* Object with containing directory information */ ) { FRESULT res; /* Open object containing directory */ dp->obj.fs = obj->fs; dp->obj.sclust = obj->c_scl; dp->obj.stat = (BYTE)obj->c_size; dp->obj.objsize = obj->c_size & 0xFFFFFF00; dp->blk_ofs = obj->c_ofs; res = dir_sdi(dp, dp->blk_ofs); /* Goto the block location */ if (res == FR_OK) { res = load_xdir(dp); /* Load the object's entry block */ } return res; } #endif #if !_FS_READONLY /*-----------------------------------------------*/ /* exFAT: Store the directory block to the media */ /*-----------------------------------------------*/ static FRESULT store_xdir ( DIR* dp /* Pointer to the direcotry object */ ) { FRESULT res; UINT nent; BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the direcotry entry block 85+C0+C1s */ /* Create set sum */ st_word(dirb + XDIR_SetSum, xdir_sum(dirb)); nent = dirb[XDIR_NumSec] + 1; /* Store the set of directory to the volume */ res = dir_sdi(dp, dp->blk_ofs); while (res == FR_OK) { res = move_window(dp->obj.fs, dp->sect); if (res != FR_OK) break; mem_cpy(dp->dir, dirb, SZDIRE); dp->obj.fs->wflag = 1; if (--nent == 0) break; dirb += SZDIRE; res = dir_next(dp, 0); } return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR; } /*-------------------------------------------*/ /* exFAT: Create a new directory enrty block */ /*-------------------------------------------*/ static void create_xdir ( BYTE* dirb, /* Pointer to the direcotry entry block buffer */ const WCHAR* lfn /* Pointer to the nul terminated file name */ ) { BYTE nb, nc; WCHAR chr; mem_set(dirb, 0, 2 * SZDIRE); /* Initialize 85+C0 entry */ dirb[XDIR_Type] = 0x85; dirb[XDIR_Type + SZDIRE] = 0xC0; st_word(dirb + XDIR_NameHash, xname_sum(lfn)); /* Set name hash */ size_t i = SZDIRE * 2; /* C1 offset */ nc = 0; nb = 1; chr = 1; do { dirb[i++] = 0xC1; dirb[i++] = 0; /* Entry type C1 */ do { /* Fill name field */ if (chr && (chr = lfn[nc]) != 0) nc++; /* Get a character if exist */ st_word(dirb + i, chr); i += 2; /* Store it */ } while (i % SZDIRE); nb++; } while (lfn[nc]); /* Fill next entry if any char follows */ dirb[XDIR_NumName] = nc; /* Set name length */ dirb[XDIR_NumSec] = nb; /* Set number of C0+C1s */ } #endif /* !_FS_READONLY */ #endif /* _FS_EXFAT */ #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 || _USE_LABEL || _FS_EXFAT /*-----------------------------------------------------------------------*/ /* Read an object from the directory */ /*-----------------------------------------------------------------------*/ static FRESULT dir_read ( DIR* dp, /* Pointer to the directory object */ int vol /* Filtered by 0:file/directory or 1:volume label */ ) { FRESULT res = FR_NO_FILE; FATFS *fs = dp->obj.fs; BYTE a; #if _USE_LFN != 0 BYTE ord = 0xFF, sum = 0xFF; #endif while (dp->sect) { res = move_window(fs, dp->sect); if (res != FR_OK) break; BYTE c = dp->dir[DIR_Name]; /* Test for the entry type */ if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of the directory */ #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { /* At the exFAT */ if (_USE_LABEL && vol) { if (c == 0x83) break; /* Volume label entry? */ } else { if (c == 0x85) { /* Start of the file entry block? */ dp->blk_ofs = dp->dptr; /* Get location of the block */ res = load_xdir(dp); /* Load the entry block */ if (res == FR_OK) { dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK; /* Get attribute */ } break; } } } else #endif { /* At the FAT12/16/32 */ dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK; /* Get attribute */ #if _USE_LFN != 0 /* LFN configuration */ if (c == DDEM || 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 an LFN sequence? */ sum = dp->dir[LDIR_Chksum]; c &= ~LLEF; ord = c; dp->blk_ofs = dp->dptr; } /* Check LFN validity and capture it */ ord = (c == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF; } else { /* An SFN entry is found */ if (ord || sum != sum_sfn(dp->dir)) { /* Is there a valid LFN? */ dp->blk_ofs = 0xFFFFFFFF; /* It has no LFN. */ } break; } } #else /* Non LFN configuration */ if (c != DDEM && 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; /* Terminate the read operation on error or EOT */ return res; } #endif /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */ /*-----------------------------------------------------------------------*/ /* Directory handling - Find an object in the directory */ /*-----------------------------------------------------------------------*/ static FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */ DIR* dp /* Pointer to the directory object with the file name */ ) { FRESULT res; FATFS *fs = dp->obj.fs; res = dir_sdi(dp, 0); /* Rewind directory object */ if (res != FR_OK) return res; #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { /* At the exFAT */ BYTE nc; UINT di; size_t ni; WORD hash = xname_sum(fs->lfnbuf); /* Hash value of the name to find */ while ((res = dir_read(dp, 0)) == FR_OK) { /* Read an item */ if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue; /* Skip the comparison if hash value mismatched */ for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) { /* Compare the name */ if ((di % SZDIRE) == 0) di += 2; if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break; } if (nc == 0 && !fs->lfnbuf[ni]) break; /* Name matched? */ } return res; } #endif /* At the FAT12/16/32 */ #if _USE_LFN != 0 BYTE ord = 0xFF; BYTE sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ #endif do { res = move_window(fs, dp->sect); if (res != FR_OK) break; BYTE c = dp->dir[DIR_Name]; if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ #if _USE_LFN != 0 /* LFN configuration */ BYTE a; dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK; if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ } else { if (a == AM_LFN) { /* An LFN entry is found */ if (!(dp->fn[NSFLAG] & NS_NOLFN)) { if (c & LLEF) { /* Is it start of LFN sequence? */ sum = dp->dir[LDIR_Chksum]; c &= ~LLEF; ord = c; /* LFN start order */ dp->blk_ofs = dp->dptr; /* Start offset of LFN */ } /* Check validity of the LFN entry and compare it with given name */ ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF; } } else { /* An SFN entry is found */ if (!ord && sum == sum_sfn(dp->dir)) break; /* LFN matched? */ if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* SFN matched? */ ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ } } #else /* Non LFN configuration */ dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK; if (!(dp->dir[DIR_Attr] & AM_VOL) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* Is it a valid entry? */ #endif res = dir_next(dp, 0); /* Next entry */ } while (res == FR_OK); return res; } #if !_FS_READONLY /*-----------------------------------------------------------------------*/ /* Register an object to the directory */ /*-----------------------------------------------------------------------*/ static FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */ DIR* dp /* Target directory with object name to be created */ ) { FRESULT res; FATFS *fs = dp->obj.fs; #if _USE_LFN != 0 /* LFN configuration */ size_t nlen; UINT nent; BYTE sn[12]; if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME; /* Check name validity */ for (nlen = 0; fs->lfnbuf[nlen]; nlen++) ; /* Get lfn length */ #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { /* At the exFAT */ DIR dj; nent = (nlen + 14) / 15 + 2; /* Number of entries to allocate (85+C0+C1s) */ res = dir_alloc(dp, nent); /* Allocate entries */ if (res != FR_OK) return res; dp->blk_ofs = dp->dptr - SZDIRE * (nent - 1); /* Set block position */ if (dp->obj.sclust != 0 && (dp->obj.stat & 4)) { /* Has the sub-directory been stretched? */ dp->obj.stat &= 3; dp->obj.objsize += (DWORD)fs->csize * SS(fs); /* Increase object size by cluster size */ res = fill_fat_chain(&dp->obj); /* Complement FAT chain if needed */ if (res != FR_OK) return res; res = load_obj_dir(&dj, &dp->obj); if (res != FR_OK) return res; /* Load the object status */ st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize); /* Update the allocation status */ st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize); fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1; res = store_xdir(&dj); /* Store the object status */ if (res != FR_OK) return res; } create_xdir(fs->dirbuf, fs->lfnbuf); /* Create on-memory directory block to be written later */ return FR_OK; } #endif /* At the FAT12/16/32 */ mem_cpy(sn, dp->fn, 12); if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ dp->fn[NSFLAG] = NS_NOLFN; /* Find only SFN */ UINT n; for (n = 1; n < 100; n++) { gen_numname(dp->fn, sn, fs->lfnbuf, 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' */ dp->fn[NSFLAG] = sn[NSFLAG]; } /* Create an SFN with/without LFNs. */ nent = (sn[NSFLAG] & NS_LFN) ? (nlen + 12) / 13 + 1 : 1; /* Number of entries to allocate */ res = dir_alloc(dp, nent); /* Allocate entries */ if (res == FR_OK && --nent) { /* Set LFN entry if needed */ res = dir_sdi(dp, dp->dptr - nent * SZDIRE); if (res == FR_OK) { BYTE sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */ do { /* Store LFN entries in bottom first */ res = move_window(fs, dp->sect); if (res != FR_OK) break; put_lfn(fs->lfnbuf, dp->dir, (BYTE)nent, sum); 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 /* Set SFN entry */ if (res == FR_OK) { res = move_window(fs, dp->sect); if (res == FR_OK) { mem_set(dp->dir, 0, SZDIRE); /* Clean the entry */ mem_cpy(dp->dir + DIR_Name, dp->fn, 11); /* Put SFN */ #if _USE_LFN != 0 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */ #endif fs->wflag = 1; } } return res; } #endif /* !_FS_READONLY */ #if !_FS_READONLY && _FS_MINIMIZE == 0 /*-----------------------------------------------------------------------*/ /* Remove an object from the directory */ /*-----------------------------------------------------------------------*/ static FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */ DIR* dp /* Directory object pointing the entry to be removed */ ) { FRESULT res; FATFS *fs = dp->obj.fs; #if _USE_LFN != 0 /* LFN configuration */ DWORD last = dp->dptr; res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs); /* Goto top of the entry block if LFN is exist */ if (res == FR_OK) { do { res = move_window(fs, dp->sect); if (res != FR_OK) break; /* Mark an entry 'deleted' */ if (_FS_EXFAT && fs->fs_type == FS_EXFAT) { /* At the exFAT */ dp->dir[XDIR_Type] &= 0x7F; } else { /* At the FAT12/16/32 */ dp->dir[DIR_Name] = DDEM; } fs->wflag = 1; if (dp->dptr >= last) break; /* If reached last entry then 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 = move_window(fs, dp->sect); if (res == FR_OK) { dp->dir[DIR_Name] = DDEM; fs->wflag = 1; } #endif return res; } #endif /* !_FS_READONLY && _FS_MINIMIZE == 0 */ #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 /*-----------------------------------------------------------------------*/ /* Get file information from directory entry */ /*-----------------------------------------------------------------------*/ static void get_fileinfo ( /* No return code */ DIR* dp, /* Pointer to the directory object */ FILINFO* fno /* Pointer to the file information to be filled */ ) { UINT i; size_t j; DWORD tm; #if _USE_LFN != 0 WCHAR w, lfv; FATFS *fs = dp->obj.fs; #endif fno->fname[0] = 0; /* Invaidate file info */ if (!dp->sect) return; /* Exit if read pointer has reached end of directory */ #if _USE_LFN != 0 /* LFN configuration */ #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { /* At the exFAT */ get_xdir_info(fs->dirbuf, fno); return; } else #endif { /* At the FAT12/16/32 */ if (dp->blk_ofs != 0xFFFFFFFF) { /* Get LFN if available */ i = j = 0; while ((w = fs->lfnbuf[j++]) != 0) { /* Get an LFN character */ #if !_LFN_UNICODE w = ff_convert(w, 0); /* Unicode -> OEM */ if (w == 0) { 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 at SBCS cfg) */ fno->fname[i++] = (char)(w >> 8); } #endif if (i >= _MAX_LFN) { i = 0; break; } /* No LFN if buffer overflow */ fno->fname[i++] = (TCHAR)w; } fno->fname[i] = 0; /* Terminate the LFN */ } } i = j = 0; lfv = fno->fname[i]; /* LFN is exist if non-zero */ while (i < 11) { /* Copy name body and extension */ TCHAR c = (TCHAR)dp->dir[i++]; if (c == ' ') continue; /* Skip padding spaces */ if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */ if (i == 9) { /* Insert a . if extension is exist */ if (!lfv) fno->fname[j] = '.'; fno->altname[j++] = '.'; } #if _LFN_UNICODE if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dp->dir[i])) { c = c << 8 | dp->dir[i++]; } c = ff_convert(c, 1); /* OEM -> Unicode */ if (!c) c = '?'; #endif fno->altname[j] = c; if (!lfv) { if (IsUpper(c) && (dp->dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY))) { c += 0x20; /* To lower */ } fno->fname[j] = c; } j++; } if (!lfv) { fno->fname[j] = 0; if (!dp->dir[DIR_NTres]) j = 0; /* Altname is no longer needed if neither LFN nor case info is exist. */ } fno->altname[j] = 0; /* Terminate the SFN */ #else /* Non-LFN configuration */ i = j = 0; while (i < 11) { /* Copy name body and extension */ TCHAR c = (TCHAR)dp->dir[i++]; if (c == ' ') continue; /* Skip padding spaces */ if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */ if (i == 9) fno->fname[j++] = '.'; /* Insert a . if extension is exist */ fno->fname[j++] = c; } fno->fname[j] = 0; #endif fno->fattrib = dp->dir[DIR_Attr]; /* Attribute */ fno->fsize = ld_dword(dp->dir + DIR_FileSize); /* Size */ tm = ld_dword(dp->dir + DIR_ModTime); /* Timestamp */ fno->ftime = (WORD)tm; fno->fdate = (WORD)(tm >> 16); } #endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */ #if _USE_FIND && _FS_MINIMIZE <= 1 /*-----------------------------------------------------------------------*/ /* Pattern matching */ /*-----------------------------------------------------------------------*/ 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 */ ) { #if !_LFN_UNICODE WCHAR chr; chr = (BYTE)*(*ptr)++; /* Get a byte */ if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */ #ifdef _EXCVT if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */ #else if (IsDBCS1(chr) && IsDBCS2(**ptr)) { /* Get DBC 2nd byte if needed */ chr = chr << 8 | (BYTE)*(*ptr)++; } #endif return chr; #else return ff_wtoupper(*(*ptr)++); /* Get a word and to upper */ #endif } static int pattern_matching ( /* 0:not matched, 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 == 0) 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 */ DIR* dp, /* Pointer to the directory object */ const TCHAR** path /* Pointer to pointer to the segment in the path string */ ) { #if _USE_LFN != 0 /* LFN configuration */ BYTE b, cf; WCHAR w, *lfn; UINT i, ni; size_t di, si; const TCHAR *p; /* Create LFN in Unicode */ p = *path; lfn = dp->obj.fs->lfnbuf; si = di = 0; for (;;) { w = p[si++]; /* Get a character */ if (w < ' ') break; /* Break if end of the path name */ if (w == '/' || w == '\\') { /* Break if a separator is found */ while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */ break; } if (di >= _MAX_LFN) return FR_INVALID_NAME; /* Reject too long 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)) return FR_INVALID_NAME; /* Reject illegal characters for LFN */ 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 the path */ #if _FS_RPATH != 0 if ((di == 1 && lfn[di - 1] == '.') || (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot name? */ 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--; } lfn[di] = 0; /* LFN is created */ if (di == 0) return FR_INVALID_NAME; /* Reject nul name */ /* 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) cf |= NS_LFN; /* Create LFN entry when there are composite capitals */ 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 /* _USE_LFN != 0 : Non-LFN configuration */ BYTE c, d, *sfn; UINT ni, si, i; const char *p; /* Create file name in directory form */ p = *path; sfn = dp->fn; mem_set(sfn, ' ', 11); si = i = 0; ni = 8; #if _FS_RPATH != 0 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 the path */ return FR_OK; } #endif for (;;) { c = (BYTE)p[si++]; if (c <= ' ') break; /* Break if end of the path name */ if (c == '/' || c == '\\') { /* Break if a separator is found */ while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */ break; } if (c == '.' || i >= ni) { /* End of body or over size? */ if (ni == 11 || c != '.') return FR_INVALID_NAME; /* Over size or invalid dot */ i = 8; ni = 11; /* Goto extension */ continue; } if (c >= 0x80) { /* Extended character? */ #ifdef _EXCVT c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */ #else #if !_DF1S return FR_INVALID_NAME; /* Reject extended characters (ASCII only 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) return FR_INVALID_NAME; /* Reject invalid DBC */ sfn[i++] = c; sfn[i++] = d; } else { /* SBC */ if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) return FR_INVALID_NAME; /* Reject illegal chrs for SFN */ if (IsLower(c)) c -= 0x20; /* To upper */ sfn[i++] = c; } } *path = p + si; /* Return pointer to the next segment */ if (i == 0) return FR_INVALID_NAME; /* Reject nul string */ if (sfn[0] == DDEM) sfn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */ sfn[NSFLAG] = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */ return FR_OK; #endif /* _USE_LFN != 0 */ } /*-----------------------------------------------------------------------*/ /* Follow a file path */ /*-----------------------------------------------------------------------*/ static FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ DIR* dp, /* Directory object to return last directory and found object */ const TCHAR* path /* Full-path string to find a file or directory */ ) { FRESULT res; _FDID *obj = &dp->obj; FATFS *fs = obj->fs; #if _FS_RPATH != 0 if (*path != '/' && *path != '\\') { /* Without heading separator */ obj->sclust = fs->cdir; /* Start from the current directory */ } else #endif { /* With heading separator */ while (*path == '/' || *path == '\\') path++; /* Strip heading separator */ obj->sclust = 0; /* Start from the root directory */ } #if _FS_EXFAT && _FS_RPATH != 0 if (fs->fs_type == FS_EXFAT && obj->sclust) { /* Retrieve the sub-directory status if needed */ DIR dj; obj->c_scl = fs->cdc_scl; obj->c_size = fs->cdc_size; obj->c_ofs = fs->cdc_ofs; res = load_obj_dir(&dj, obj); if (res != FR_OK) return res; obj->objsize = ld_dword(fs->dirbuf + XDIR_FileSize); obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; } #endif if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */ dp->fn[NSFLAG] = NS_NONAME; res = dir_sdi(dp, 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 segment name */ BYTE 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, stay there */ if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */ dp->fn[NSFLAG] = NS_NONAME; res = FR_OK; } 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. */ /* Get into the sub-directory */ if (!(obj->attr & AM_DIR)) { /* It is not a sub-directory and cannot follow */ res = FR_NO_PATH; break; } #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { obj->c_scl = obj->sclust; /* Save containing directory information for next dir */ obj->c_size = ((DWORD)obj->objsize & 0xFFFFFF00) | obj->stat; obj->c_ofs = dp->blk_ofs; obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Open next directory */ obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize); } else #endif { obj->sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs)); /* Open next directory */ } } } 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 */ ) { 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 */ const TCHAR *tt; for (tt = *path; (UINT)*tt >= (_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find ':' in the path */ if (*tt == ':') { /* If a ':' is exist in the path name */ const TCHAR *tp; tp = *path; UINT 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 != 0 && _VOLUMES >= 2 vol = CurrVol; /* Current drive */ #else vol = 0; /* Drive 0 */ #endif } return vol; } /*-----------------------------------------------------------------------*/ /* Load a sector and check if it is an FAT boot sector */ /*-----------------------------------------------------------------------*/ static BYTE check_fs ( /* 0:FAT, 1:exFAT, 2:Valid BS but not FAT, 3:Not a BS, 4:Disk error */ FATFS* fs, /* File system object */ DWORD sect /* Sector# (lba) to check if it is an FAT-VBR or not */ ) { fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */ if (move_window(fs, sect) != FR_OK) return 4; /* Load boot record */ if (ld_word(fs->win + BS_55AA) != 0xAA55) return 3; /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */ if (fs->win[BS_JmpBoot] == 0xE9 || (fs->win[BS_JmpBoot] == 0xEB && fs->win[BS_JmpBoot + 2] == 0x90)) { if ((ld_dword(fs->win + BS_FilSysType) & 0xFFFFFF) == 0x544146) return 0; /* Check "FAT" string */ if (ld_dword(fs->win + BS_FilSysType32) == 0x33544146) return 0; /* Check "FAT3" string */ } #if _FS_EXFAT if (!mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11)) return 1; #endif return 2; } /*-----------------------------------------------------------------------*/ /* Find logical drive and check if the volume is mounted */ /*-----------------------------------------------------------------------*/ static FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */ const TCHAR** path, /* Pointer to pointer to the path name (drive number) */ FATFS** rfs, /* Pointer to pointer to the found file system object */ BYTE mode /* !=0: Check write protection for write access */ ) { BYTE fmt, *pt; int vol; DSTATUS stat; DWORD bsect, nclst, br[4]; 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 */ mode &= ~FA_READ; /* Desired access mode, write access or not */ 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 && mode && (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 && mode && (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) return FR_DISK_ERR; if (SS(fs) > _MAX_SS || SS(fs) < _MIN_SS || (SS(fs) & (SS(fs) - 1))) 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-VBR as SFD */ if (fmt == 2 || (fmt < 2 && LD2PT(vol) != 0)) { /* Not an FAT-VBR or forced partition number */ for (i = 0; i < 4; i++) { /* Get partition offset */ pt = fs->win + (MBR_Table + i * SZ_PTE); br[i] = pt[PTE_System] ? ld_dword(pt + PTE_StLba) : 0; } i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */ #if _MULTI_PARTITION if (i) i--; #endif do { /* Find an FAT volume */ bsect = br[i]; fmt = bsect ? check_fs(fs, bsect) : 3; /* Check the partition */ } while (!LD2PT(vol) && fmt >= 2 && ++i < 4); } if (fmt == 4) return FR_DISK_ERR; /* An error occured in the disk I/O layer */ if (fmt >= 2) return FR_NO_FILESYSTEM; /* No FAT volume is found */ /* An FAT volume is found. Following code initializes the file system object */ #if _FS_EXFAT if (fmt == 1) { QWORD maxlba; for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ; /* Check zero filler */ if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM; if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM; /* Check exFAT revision (Must be 1.0) */ if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs)) /* (BPB_BytsPerSecEx must be equal to the physical sector size) */ return FR_NO_FILESYSTEM; maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect; /* Last LBA + 1 of the volume */ if (maxlba >= 0x100000000) return FR_NO_FILESYSTEM; /* (It cannot be handled in 32-bit LBA) */ fs->fsize = ld_dword(fs->win + BPB_FatSzEx); /* Number of sectors per FAT */ fs->n_fats = fs->win[BPB_NumFATsEx]; /* Number of FATs */ if (fs->n_fats != 1) return FR_NO_FILESYSTEM; /* (Supports only 1 FAT) */ fs->csize = 1 << fs->win[BPB_SecPerClusEx]; /* Cluster size */ if (fs->csize == 0) return FR_NO_FILESYSTEM; /* (Must be 1..32768) */ nclst = ld_dword(fs->win + BPB_NumClusEx); /* Number of clusters */ if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM; /* (Too many clusters) */ fs->n_fatent = nclst + 2; /* Boundaries and Limits */ fs->volbase = bsect; fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx); fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx); if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM; /* (Volume size must not be smaller than the size requiered) */ fs->dirbase = ld_dword(fs->win + BPB_RootClusEx); /* Check if bitmap location is in assumption (at the first cluster) */ if (move_window(fs, clust2sect(fs, fs->dirbase)) != FR_OK) return FR_DISK_ERR; for (i = 0; i < SS(fs); i += SZDIRE) { if (fs->win[i] == 0x81 && ld_dword(fs->win + i + 20) == 2) break; /* 81 entry with cluster #2? */ } if (i == SS(fs)) return FR_NO_FILESYSTEM; #if !_FS_READONLY fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */ #endif fmt = FS_EXFAT; /* FAT sub-type */ } else #endif /* _FS_EXFAT */ { if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_BytsPerSec must be equal to the physical sector size) */ DWORD fasize = ld_word(fs->win + BPB_FATSz16); /* Number of sectors per FAT */ if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32); fs->fsize = fasize; fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FATs */ if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */ fasize *= fs->n_fats; /* Number of sectors for FAT area */ fs->csize = fs->win[BPB_SecPerClus]; /* Cluster size */ if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */ fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt); /* Number of root directory entries */ if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM; /* (Must be sector aligned) */ DWORD tsect = ld_word(fs->win + BPB_TotSec16); /* Number of sectors on the volume */ if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32); WORD nrsv = ld_word(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */ if (nrsv == 0) return FR_NO_FILESYSTEM; /* (Must not be 0) */ /* Determine the FAT sub type */ DWORD sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE); /* RSV + FAT + DIR */ if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ if (nclst == 0) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ fmt = FS_FAT32; if (nclst <= MAX_FAT16) fmt = FS_FAT16; if (nclst <= MAX_FAT12) fmt = FS_FAT12; /* 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 */ DWORD szbfat; if (fmt == FS_FAT32) { if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM; /* (Must be FAT32 revision 0.0) */ if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ fs->dirbase = ld_dword(fs->win + BPB_RootClus32); /* Root directory start cluster */ szbfat = fs->n_fatent * 4; /* (Needed FAT size) */ } else { if (fs->n_rootdir == 0) 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)) return FR_NO_FILESYSTEM; /* (BPB_FATSz must not be less than the size needed) */ #if !_FS_READONLY /* Get FSINFO if available */ fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */ fs->fsi_flag = 0x80; #if (_FS_NOFSINFO & 3) != 3 if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo32 == 1 */ && ld_word(fs->win + BPB_FSInfo32) == 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_clst = ld_dword(fs->win + FSI_Free_Count); #endif #if (_FS_NOFSINFO & 2) == 0 fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free); #endif } } #endif /* (_FS_NOFSINFO & 3) != 3 */ #endif /* !_FS_READONLY */ } fs->fs_type = fmt; /* FAT sub-type */ fs->id = ++Fsid; /* File system mount ID */ #if _USE_LFN == 1 fs->lfnbuf = LfnBuf; /* Static LFN working buffer */ #if _FS_EXFAT fs->dirbuf = DirBuf; /* Static directory block working buuffer */ #endif #endif #if _FS_RPATH != 0 fs->cdir = 0; /* Initialize current directory */ #endif #if _FS_LOCK != 0 /* Clear file lock semaphores */ clear_lock(fs); #endif return FR_OK; } /*-----------------------------------------------------------------------*/ /* Check if the file/directory object is valid or not */ /*-----------------------------------------------------------------------*/ static FRESULT validate ( /* Returns FR_OK or FR_INVALID_OBJECT */ void* dfp, /* Pointer to the FIL/DIR object to check validity */ FATFS** fs /* Pointer to pointer to the owner file system object to return */ ) { FRESULT res; if (!dfp) { *fs = 0; /* The object is invalid */ res = FR_INVALID_OBJECT; } else { _FDID *obj = (_FDID*)dfp; /* Assuming .obj in the FIL/DIR is the first member */ if (!obj->fs || !obj->fs->fs_type || obj->fs->id != obj->id || (disk_status(obj->fs->drv) & STA_NOINIT)) { *fs = 0; /* The object is invalid */ res = FR_INVALID_OBJECT; } else { *fs = obj->fs; /* Owner file sytem object */ ENTER_FF(obj->fs); /* Lock file system */ res = FR_OK; } } return res; } /*--------------------------------------------------------------------------- Public Functions (FatFs API) ----------------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/ /* 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 /* Mode option 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 != 0 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(&path, &fs, 0); /* Force mounted the volume */ LEAVE_FF(fs, res); } /*-----------------------------------------------------------------------*/ /* Open or Create a File */ /*-----------------------------------------------------------------------*/ FRESULT f_open ( FIL* fp, /* Pointer to the blank file object */ const TCHAR* path, /* Pointer to the file name */ BYTE mode /* Access mode and file open mode flags */ ) { FRESULT res; DIR dj; FATFS *fs; DEF_NAMBUF if (!fp) return FR_INVALID_OBJECT; /* Get logical drive number */ mode &= _FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND | FA_SEEKEND; res = find_volume(&path, &fs, mode); if (res == FR_OK) { dj.obj.fs = fs; INIT_NAMBUF(fs); res = follow_path(&dj, path); /* Follow the file path */ #if !_FS_READONLY /* R/W configuration */ if (res == FR_OK) { if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */ res = FR_INVALID_NAME; } #if _FS_LOCK != 0 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 != 0 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; #else res = dir_register(&dj); #endif mode |= FA_CREATE_ALWAYS; /* File is created */ } else { /* Any object is already existing */ if (dj.obj.attr & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */ res = FR_DENIED; } else { if (mode & FA_CREATE_NEW) res = FR_EXIST; /* Cannot create as new file */ } } if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */ DWORD dw = GET_FATTIME(); #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { /* Get current allocation info */ fp->obj.fs = fs; fp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus); fp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize); fp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2; /* Initialize directory entry block */ st_dword(fs->dirbuf + XDIR_CrtTime, dw); /* Set created time */ fs->dirbuf[XDIR_CrtTime10] = 0; st_dword(fs->dirbuf + XDIR_ModTime, dw); /* Set modified time */ fs->dirbuf[XDIR_ModTime10] = 0; fs->dirbuf[XDIR_Attr] = AM_ARC; /* Reset attribute */ st_dword(fs->dirbuf + XDIR_FstClus, 0); /* Reset file allocation info */ st_qword(fs->dirbuf + XDIR_FileSize, 0); st_qword(fs->dirbuf + XDIR_ValidFileSize, 0); fs->dirbuf[XDIR_GenFlags] = 1; res = store_xdir(&dj); if (res == FR_OK && fp->obj.sclust) { /* Remove the cluster chain if exist */ res = remove_chain(&fp->obj, fp->obj.sclust, 0); fs->last_clst = fp->obj.sclust - 1; /* Reuse the cluster hole */ } } else #endif { /* Clean directory info */ st_dword(dj.dir + DIR_CrtTime, dw); /* Set created time */ st_dword(dj.dir + DIR_ModTime, dw); /* Set modified time */ dj.dir[DIR_Attr] = AM_ARC; /* Reset attribute */ DWORD cl = ld_clust(fs, dj.dir); /* Get cluster chain */ st_clust(fs, dj.dir, 0); /* Reset file allocation info */ st_dword(dj.dir + DIR_FileSize, 0); fs->wflag = 1; if (cl) { /* Remove the cluster chain if exist */ dw = fs->winsect; res = remove_chain(&dj.obj, cl, 0); if (res == FR_OK) { res = move_window(fs, dw); fs->last_clst = cl - 1; /* Reuse the cluster hole */ } } } } } else { /* Open an existing file */ if (res == FR_OK) { /* Following succeeded */ if (dj.obj.attr & AM_DIR) { /* It is a directory */ res = FR_NO_FILE; } else { if ((mode & FA_WRITE) && (dj.obj.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_MODIFIED; fp->dir_sect = fs->winsect; /* Pointer to the directory entry */ fp->dir_ptr = dj.dir; #if _FS_LOCK != 0 fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); if (!fp->obj.lockid) res = FR_INT_ERR; #endif } #else /* R/O configuration */ if (res == FR_OK) { if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */ res = FR_INVALID_NAME; } else { if (dj.obj.attr & AM_DIR) { /* It is a directory */ res = FR_NO_FILE; } } } #endif if (res == FR_OK) { #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { fp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Get allocation info */ fp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize); fp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2; fp->obj.c_scl = dj.obj.sclust; fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat; fp->obj.c_ofs = dj.blk_ofs; } else #endif { fp->obj.sclust = ld_clust(fs, dj.dir); /* Get allocation info */ fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize); } #if _USE_FASTSEEK fp->cltbl = 0; /* Disable fast seek mode */ #endif fp->obj.fs = fs; /* Validate the file object */ fp->obj.id = fs->id; fp->flag = mode; /* Set file access mode */ fp->err = 0; /* Clear error flag */ fp->sect = 0; /* Invalidate current data sector */ fp->fptr = 0; /* Set file pointer top of the file */ #if !_FS_READONLY #if !_FS_TINY mem_set(fp->buf, 0, _MAX_SS); /* Clear sector buffer */ #endif if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) { /* Seek to end of file if FA_OPEN_APPEND is specified */ fp->fptr = fp->obj.objsize; /* Offset to seek */ DWORD bcs = (DWORD)fs->csize * SS(fs); /* Cluster size in byte */ DWORD clst = fp->obj.sclust; /* Follow the cluster chain */ FSIZE_t ofs; for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) { clst = get_fat(&fp->obj, clst); if (clst <= 1) res = FR_INT_ERR; if (clst == 0xFFFFFFFF) res = FR_DISK_ERR; } fp->clust = clst; if (res == FR_OK && ofs % SS(fs)) { /* Fill sector buffer if not on the sector boundary */ DWORD sc; if ((sc = clust2sect(fs, clst)) == 0) { res = FR_INT_ERR; } else { fp->sect = sc + (DWORD)(ofs / SS(fs)); #if !_FS_TINY if (disk_read(fs->drv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR; #endif } } } #endif } FREE_NAMBUF(); } if (res != FR_OK) fp->obj.fs = 0; /* Invalidate file object on error */ LEAVE_FF(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; FATFS *fs; DWORD clst, sect; FSIZE_t remain; UINT rcnt, cc, csect; BYTE *rbuff = (BYTE*)buff; *br = 0; /* Clear read byte counter */ res = validate(fp, &fs); if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ remain = fp->obj.objsize - 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(fs) == 0) { /* On the sector boundary? */ csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */ if (csect == 0) { /* On the cluster boundary? */ if (fp->fptr == 0) { /* On the top of the file? */ clst = fp->obj.sclust; /* Follow cluster chain 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->obj, fp->clust); /* Follow cluster chain on the FAT */ } } if (clst < 2) ABORT(fs, FR_INT_ERR); if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); fp->clust = clst; /* Update current cluster */ } sect = clust2sect(fs, fp->clust); /* Get current sector */ if (!sect) ABORT(fs, FR_INT_ERR); sect += csect; cc = btr / SS(fs); /* When remaining bytes >= sector size, */ if (cc) { /* Read maximum contiguous sectors directly */ if (csect + cc > fs->csize) { /* Clip at cluster boundary */ cc = fs->csize - csect; } if (disk_read(fs->drv, rbuff, sect, cc) != RES_OK) ABORT(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 (fs->wflag && fs->winsect - sect < cc) { mem_cpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs)); } #else if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) { mem_cpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs)); } #endif #endif rcnt = SS(fs) * cc; /* Number of bytes transferred */ continue; } #if !_FS_TINY if (fp->sect != sect) { /* Load data sector if not in cache */ #if !_FS_READONLY if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); fp->flag &= ~FA_DIRTY; } #endif if (disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */ } #endif fp->sect = sect; } rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */ if (rcnt > btr) rcnt = btr; /* Clip it by btr if needed */ #if _FS_TINY if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */ mem_cpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt); /* Extract partial sector */ #else mem_cpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt); /* Extract partial sector */ #endif } LEAVE_FF(fs, FR_OK); } #if !_FS_READONLY /*-----------------------------------------------------------------------*/ /* Write File */ /*-----------------------------------------------------------------------*/ FRESULT f_write ( FIL* fp, /* Pointer to the file object */ 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; FATFS *fs; DWORD clst, sect; UINT wcnt, cc, csect; BYTE *wbuff = ( BYTE*)buff; *bw = 0; /* Clear write byte counter */ res = validate(fp, &fs); if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ /* Check fptr wrap-around (file size cannot reach 4GiB on FATxx) */ if ((!_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) { btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr); } for ( ; btw; /* Repeat until all data written */ wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize, *bw += wcnt, btw -= wcnt) { if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1); /* Sector offset in the cluster */ if (csect == 0) { /* On the cluster boundary? */ if (fp->fptr == 0) { /* On the top of the file? */ clst = fp->obj.sclust; /* Follow from the origin */ if (clst == 0) { /* If no cluster is allocated, */ clst = create_chain(&fp->obj, 0); /* create a new cluster chain */ } } else { /* On the 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->obj, 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(fs, FR_INT_ERR); if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); fp->clust = clst; /* Update current cluster */ if (fp->obj.sclust == 0) fp->obj.sclust = clst; /* Set start cluster if the first write */ } #if _FS_TINY if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Write-back sector cache */ #else if (fp->flag & FA_DIRTY) { /* Write-back sector cache */ if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); fp->flag &= ~FA_DIRTY; } #endif sect = clust2sect(fs, fp->clust); /* Get current sector */ if (!sect) ABORT(fs, FR_INT_ERR); sect += csect; cc = btw / SS(fs); /* When remaining bytes >= sector size, */ if (cc) { /* Write maximum contiguous sectors directly */ if (csect + cc > fs->csize) { /* Clip at cluster boundary */ cc = fs->csize - csect; } if (disk_write(fs->drv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR); #if _FS_MINIMIZE <= 2 #if _FS_TINY if (fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ mem_cpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs)); fs->wflag = 0; } #else if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ mem_cpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs)); fp->flag &= ~FA_DIRTY; } #endif #endif wcnt = SS(fs) * cc; /* Number of bytes transferred */ continue; } #if _FS_TINY if (fp->fptr >= fp->obj.objsize) { /* Avoid silly cache filling at growing edge */ if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); fs->winsect = sect; } #else if (fp->sect != sect && /* Fill sector cache with file data */ fp->fptr < fp->obj.objsize && disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) { ABORT(fs, FR_DISK_ERR); } #endif fp->sect = sect; } wcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */ if (wcnt > btw) wcnt = btw; /* Clip it by btw if needed */ #if _FS_TINY if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */ mem_cpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */ fs->wflag = 1; #else mem_cpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */ fp->flag |= FA_DIRTY; #endif } fp->flag |= FA_MODIFIED; /* Set file change flag */ LEAVE_FF(fs, FR_OK); } /*-----------------------------------------------------------------------*/ /* Synchronize the File */ /*-----------------------------------------------------------------------*/ FRESULT f_sync ( FIL* fp /* Pointer to the file object */ ) { FRESULT res; FATFS *fs; DEF_NAMBUF res = validate(fp, &fs); /* Check validity of the object */ if (res == FR_OK) { if (fp->flag & FA_MODIFIED) { /* Is there any change to the file? */ #if !_FS_TINY if (fp->flag & FA_DIRTY) { /* Write-back cached data if needed */ if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR); fp->flag &= ~FA_DIRTY; } #endif /* Update the directory entry */ DWORD tm = GET_FATTIME(); /* Modified time */ #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { res = fill_fat_chain(&fp->obj); /* Create FAT chain if needed */ if (res == FR_OK) { DIR dj; INIT_NAMBUF(fs); res = load_obj_dir(&dj, &fp->obj); /* Load directory entry block */ if (res == FR_OK) { fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive bit */ fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1; /* Update file allocation info */ st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust); st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize); st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize); st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Update modified time */ fs->dirbuf[XDIR_ModTime10] = 0; st_dword(fs->dirbuf + XDIR_AccTime, 0); res = store_xdir(&dj); /* Restore it to the directory */ if (res == FR_OK) { res = sync_fs(fs); fp->flag &= ~FA_MODIFIED; } } FREE_NAMBUF(); } } else #endif { res = move_window(fs, fp->dir_sect); if (res == FR_OK) { BYTE *dir; dir = fp->dir_ptr; dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ st_clust(fp->obj.fs, dir, fp->obj.sclust); /* Update file allocation info */ st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize); /* Update file size */ st_dword(dir + DIR_ModTime, tm); /* Update modified time */ st_word(dir + DIR_LstAccDate, 0); fs->wflag = 1; res = sync_fs(fs); /* Restore it to the directory */ fp->flag &= ~FA_MODIFIED; } } } } LEAVE_FF(fs, res); } #endif /* !_FS_READONLY */ /*-----------------------------------------------------------------------*/ /* Close File */ /*-----------------------------------------------------------------------*/ FRESULT f_close ( FIL* fp /* Pointer to the file object to be closed */ ) { FRESULT res; FATFS *fs; #if !_FS_READONLY res = f_sync(fp); /* Flush cached data */ if (res == FR_OK) #endif { res = validate(fp, &fs); /* Lock volume */ if (res == FR_OK) { #if _FS_LOCK != 0 res = dec_lock(fp->obj.lockid); /* Decrement file open counter */ if (res == FR_OK) #endif { fp->obj.fs = 0; /* Invalidate file object */ } #if _FS_REENTRANT unlock_fs(fs, FR_OK); /* Unlock volume */ #endif } } return res; } #if _FS_RPATH >= 1 /*-----------------------------------------------------------------------*/ /* Change Current Directory or Current Drive, Get Current Directory */ /*-----------------------------------------------------------------------*/ #if _VOLUMES >= 2 FRESULT f_chdrive ( const TCHAR* path /* Drive number */ ) { int vol; vol = get_ldnumber(&path); if (vol < 0) return FR_INVALID_DRIVE; CurrVol = (BYTE)vol; return FR_OK; } #endif FRESULT f_chdir ( const TCHAR* path /* Pointer to the directory path */ ) { FRESULT res; DIR dj; FATFS *fs; DEF_NAMBUF /* Get logical drive number */ res = find_volume(&path, &fs, 0); if (res == FR_OK) { dj.obj.fs = fs; INIT_NAMBUF(fs); res = follow_path(&dj, path); /* Follow the path */ if (res == FR_OK) { /* Follow completed */ if (dj.fn[NSFLAG] & NS_NONAME) { fs->cdir = dj.obj.sclust; /* It is the start directory itself */ #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { fs->cdc_scl = dj.obj.c_scl; fs->cdc_size = dj.obj.c_size; fs->cdc_ofs = dj.obj.c_ofs; } #endif } else { if (dj.obj.attr & AM_DIR) { /* It is a sub-directory */ #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus); /* Sub-directory cluster */ fs->cdc_scl = dj.obj.sclust; /* Save containing directory information */ fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat; fs->cdc_ofs = dj.blk_ofs; } else #endif { fs->cdir = ld_clust(fs, dj.dir); /* Sub-directory cluster */ } } else { res = FR_NO_PATH; /* Reached but a file */ } } } FREE_NAMBUF(); if (res == FR_NO_FILE) res = FR_NO_PATH; } LEAVE_FF(fs, res); } #if _FS_RPATH >= 2 FRESULT f_getcwd ( TCHAR* buff, /* Pointer to the directory path */ UINT len /* Size of path */ ) { FRESULT res; DIR dj; FATFS *fs; UINT i, n; DWORD ccl; TCHAR *tp; FILINFO fno; DEF_NAMBUF *buff = 0; /* Get logical drive number */ res = find_volume((const TCHAR**)&buff, &fs, 0); /* Get current volume */ if (res == FR_OK) { dj.obj.fs = fs; INIT_NAMBUF(fs); i = len; /* Bottom of buffer (directory stack base) */ if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* (Cannot do getcwd on exFAT and returns root path) */ dj.obj.sclust = fs->cdir; /* Start to follow upper directory from current directory */ while ((ccl = dj.obj.sclust) != 0) { /* Repeat while current directory is a sub-directory */ res = dir_sdi(&dj, 1 * SZDIRE); /* Get parent directory */ if (res != FR_OK) break; res = move_window(fs, dj.sect); if (res != FR_OK) break; dj.obj.sclust = ld_clust(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(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; get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */ for (n = 0; fno.fname[n]; n++) ; if (i < n + 3) { res = FR_NOT_ENOUGH_CORE; break; } while (n) buff[--i] = fno.fname[--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_NAMBUF(); } LEAVE_FF(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 */ FSIZE_t ofs /* File pointer from top of file */ ) { FRESULT res; FATFS *fs; res = validate(fp, &fs); /* Check validity of the object */ if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ #if _USE_FASTSEEK if (fp->cltbl) { /* Fast seek */ if (ofs == CREATE_LINKMAP) { /* Create CLMT */ DWORD *tbl = fp->cltbl; DWORD tlen = *tbl++; DWORD ulen = 2; /* Given table size and required table size */ DWORD cl = fp->obj.sclust; /* Origin of the chain */ if (cl) { do { /* Get a fragment */ DWORD tcl = cl; DWORD ncl = 0; ulen += 2; /* Top, length and used items */ DWORD pcl; do { pcl = cl; ncl++; cl = get_fat(&fp->obj, cl); if (cl <= 1) ABORT(fs, FR_INT_ERR); if (cl == 0xFFFFFFFF) ABORT(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 < 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->obj.objsize) ofs = fp->obj.objsize; /* Clip offset at the file size */ fp->fptr = ofs; /* Set file pointer */ if (ofs) { fp->clust = clmt_clust(fp, ofs - 1); DWORD dsc = clust2sect(fs, fp->clust); if (!dsc) ABORT(fs, FR_INT_ERR); dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1); if (fp->fptr % SS(fs) && dsc != fp->sect) { /* Refill sector cache if needed */ #if !_FS_TINY #if !_FS_READONLY if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); fp->flag &= ~FA_DIRTY; } #endif if (disk_read(fs->drv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Load current sector */ #endif fp->sect = dsc; } } } } else #endif /* Normal Seek */ { #if _FS_EXFAT if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF; /* Clip at 4GiB-1 if at FATxx */ #endif if (ofs > fp->obj.objsize && (_FS_READONLY || !(fp->flag & FA_WRITE))) { /* In read-only mode, clip offset with the file size */ ofs = fp->obj.objsize; } FSIZE_t ifptr = fp->fptr; DWORD nsect; fp->fptr = nsect = 0; if (ofs) { DWORD clst; DWORD bcs = (DWORD)fs->csize * SS(fs); /* Cluster size (byte) */ if (ifptr > 0 && (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ fp->fptr = (ifptr - 1) & ~(QWORD)(bcs - 1); /* start from the current cluster */ ofs -= fp->fptr; clst = fp->clust; } else { /* When seek to back cluster, */ clst = fp->obj.sclust; /* start from the first cluster */ #if !_FS_READONLY if (clst == 0) { /* If no cluster chain, create a new chain */ clst = create_chain(&fp->obj, 0); if (clst == 1) ABORT(fs, FR_INT_ERR); if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); fp->obj.sclust = clst; } #endif fp->clust = clst; } if (clst != 0) { while (ofs > bcs) { /* Cluster following loop */ ofs -= bcs; fp->fptr += bcs; #if !_FS_READONLY if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ if (_FS_EXFAT && fp->fptr > fp->obj.objsize) { /* No FAT chain object needs correct objsize to generate FAT value */ fp->obj.objsize = fp->fptr; fp->flag |= FA_MODIFIED; } clst = create_chain(&fp->obj, clst); /* Follow chain with forceed stretch */ if (clst == 0) { /* Clip file size in case of disk full */ ofs = 0; break; } } else #endif { clst = get_fat(&fp->obj, clst); /* Follow cluster chain if not in write mode */ } if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR); fp->clust = clst; } fp->fptr += ofs; if (ofs % SS(fs)) { nsect = clust2sect(fs, clst); /* Current sector */ if (!nsect) ABORT(fs, FR_INT_ERR); nsect += (DWORD)(ofs / SS(fs)); } } } if (!_FS_READONLY && fp->fptr > fp->obj.objsize) { /* Set file change flag if the file size is extended */ fp->obj.objsize = fp->fptr; fp->flag |= FA_MODIFIED; } if (fp->fptr % SS(fs) && nsect != fp->sect) { /* Fill sector cache if needed */ #if !_FS_TINY #if !_FS_READONLY if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); fp->flag &= ~FA_DIRTY; } #endif if (disk_read(fs->drv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */ #endif fp->sect = nsect; } } LEAVE_FF(fs, res); } #if _FS_MINIMIZE <= 1 /*-----------------------------------------------------------------------*/ /* Create a Directory Object */ /*-----------------------------------------------------------------------*/ FRESULT f_opendir ( DIR* dp, /* Pointer to directory object to create */ const TCHAR* path /* Pointer to the directory path */ ) { FRESULT res; FATFS *fs; _FDID *obj; DEF_NAMBUF if (!dp) return FR_INVALID_OBJECT; /* Get logical drive number */ obj = &dp->obj; res = find_volume(&path, &fs, 0); if (res == FR_OK) { obj->fs = fs; INIT_NAMBUF(fs); res = follow_path(dp, path); /* Follow the path to the directory */ if (res == FR_OK) { /* Follow completed */ if (!(dp->fn[NSFLAG] & NS_NONAME)) { /* It is not the origin directory itself */ if (obj->attr & AM_DIR) { /* This object is a sub-directory */ #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { obj->c_scl = obj->sclust; /* Save containing directory inforamation */ obj->c_size = ((DWORD)obj->objsize & 0xFFFFFF00) | obj->stat; obj->c_ofs = dp->blk_ofs; obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Get object location and status */ obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize); obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; } else #endif { obj->sclust = ld_clust(fs, dp->dir); /* Get object location */ } } else { /* This object is a file */ res = FR_NO_PATH; } } if (res == FR_OK) { obj->id = fs->id; res = dir_sdi(dp, 0); /* Rewind directory */ #if _FS_LOCK != 0 if (res == FR_OK) { if (obj->sclust) { obj->lockid = inc_lock(dp, 0); /* Lock the sub directory */ if (!obj->lockid) res = FR_TOO_MANY_OPEN_FILES; } else { obj->lockid = 0; /* Root directory need not to be locked */ } } #endif } } FREE_NAMBUF(); if (res == FR_NO_FILE) res = FR_NO_PATH; } if (res != FR_OK) obj->fs = 0; /* Invalidate the directory object if function faild */ LEAVE_FF(fs, res); } /*-----------------------------------------------------------------------*/ /* Close Directory */ /*-----------------------------------------------------------------------*/ FRESULT f_closedir ( DIR *dp /* Pointer to the directory object to be closed */ ) { FRESULT res; FATFS *fs; res = validate(dp, &fs); if (res == FR_OK) { #if _FS_LOCK != 0 if (dp->obj.lockid) { /* Decrement sub-directory open counter */ res = dec_lock(dp->obj.lockid); } if (res == FR_OK) #endif { dp->obj.fs = 0; /* Invalidate directory object */ } #if _FS_REENTRANT unlock_fs(fs, FR_OK); /* Unlock volume */ #endif } return res; } /*-----------------------------------------------------------------------*/ /* Read Directory Entries in Sequence */ /*-----------------------------------------------------------------------*/ FRESULT f_readdir ( DIR* dp, /* Pointer to the open directory object */ FILINFO* fno /* Pointer to file information to return */ ) { FRESULT res; FATFS *fs; DEF_NAMBUF res = validate(dp, &fs); /* Check validity of the object */ if (res == FR_OK) { if (!fno) { res = dir_sdi(dp, 0); /* Rewind the directory object */ } else { INIT_NAMBUF(fs); res = dir_read(dp, 0); /* Read an item */ if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory */ 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) res = FR_OK; /* Ignore end of directory now */ } FREE_NAMBUF(); } } LEAVE_FF(fs, res); } #if _USE_FIND /*-----------------------------------------------------------------------*/ /* Find Next File */ /*-----------------------------------------------------------------------*/ FRESULT f_findnext ( 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 (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for the file name */ #if _USE_LFN != 0 && _USE_FIND == 2 if (pattern_matching(dp->pat, fno->altname, 0, 0)) break; /* Test for alternative name if exist */ #endif } return res; } /*-----------------------------------------------------------------------*/ /* Find First File */ /*-----------------------------------------------------------------------*/ FRESULT f_findfirst ( 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; DIR dj; DEF_NAMBUF /* Get logical drive number */ res = find_volume(&path, &dj.obj.fs, 0); if (res == FR_OK) { INIT_NAMBUF(dj.obj.fs); res = follow_path(&dj, path); /* Follow the file path */ if (res == FR_OK) { /* Follow completed */ if (dj.fn[NSFLAG] & NS_NONAME) { /* It is origin directory */ res = FR_INVALID_NAME; } else { /* Found an object */ if (fno) get_fileinfo(&dj, fno); } } FREE_NAMBUF(); } LEAVE_FF(dj.obj.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; _FDID obj; /* Get logical drive number */ res = find_volume(&path, &fs, 0); if (res == FR_OK) { *fatfs = fs; /* Return ptr to the fs object */ /* If free_clst is valid, return it without full cluster scan */ if (fs->free_clst <= fs->n_fatent - 2) { *nclst = fs->free_clst; } else { /* Get number of free clusters */ DWORD nfree = 0; DWORD clst; DWORD sect; if (fs->fs_type == FS_FAT12) { /* FAT12: Sector unalighed FAT entries */ clst = 2; obj.fs = fs; do { DWORD stat = get_fat(&obj, 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 { #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { /* exFAT: Scan bitmap table */ BYTE bm; UINT b; clst = fs->n_fatent - 2; sect = fs->database; UINT i = 0; do { if (i == 0 && (res = move_window(fs, sect++)) != FR_OK) break; for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) { if (!(bm & 1)) nfree++; bm >>= 1; } i = (i + 1) % SS(fs); } while (clst); } else #endif { /* FAT16/32: Sector alighed FAT entries */ clst = fs->n_fatent; sect = fs->fatbase; BYTE *p; UINT i = 0; p = 0; do { if (i == 0) { res = move_window(fs, sect++); if (res != FR_OK) break; p = fs->win; i = SS(fs); } if (fs->fs_type == 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); } } *nclst = nfree; /* Return the free clusters */ fs->free_clst = nfree; /* Now free_clst is valid */ fs->fsi_flag |= 1; /* FSInfo is to be updated */ } } LEAVE_FF(fs, res); } /*-----------------------------------------------------------------------*/ /* Truncate File */ /*-----------------------------------------------------------------------*/ FRESULT f_truncate ( FIL* fp /* Pointer to the file object */ ) { FRESULT res; FATFS *fs; res = validate(fp, &fs); /* Check validity of the object */ if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ if (fp->obj.objsize > fp->fptr) { if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ res = remove_chain(&fp->obj, fp->obj.sclust, 0); fp->obj.sclust = 0; } else { /* When truncate a part of the file, remove remaining clusters */ DWORD ncl = get_fat(&fp->obj, fp->clust); res = FR_OK; if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; if (ncl == 1) res = FR_INT_ERR; if (res == FR_OK && ncl < fs->n_fatent) { res = remove_chain(&fp->obj, ncl, fp->clust); } } fp->obj.objsize = fp->fptr; /* Set file size to current R/W point */ fp->flag |= FA_MODIFIED; #if !_FS_TINY if (res == FR_OK && (fp->flag & FA_DIRTY)) { if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) { res = FR_DISK_ERR; } else { fp->flag &= ~FA_DIRTY; } } #endif if (res != FR_OK) ABORT(fs, res); } LEAVE_FF(fs, res); } /*-----------------------------------------------------------------------*/ /* Delete a File/Directory */ /*-----------------------------------------------------------------------*/ FRESULT f_unlink ( const TCHAR* path /* Pointer to the file or directory path */ ) { FRESULT res; DIR dj, sdj; FATFS *fs; #if _FS_EXFAT _FDID obj; #endif DEF_NAMBUF /* Get logical drive number */ res = find_volume(&path, &fs, FA_WRITE); dj.obj.fs = fs; if (res == FR_OK) { INIT_NAMBUF(fs); 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 != 0 if (res == FR_OK) res = chk_lock(&dj, 2); /* Check if it is an open object */ #endif if (res == FR_OK) { /* The object is accessible */ DWORD dclst = 0; if (dj.fn[NSFLAG] & NS_NONAME) { res = FR_INVALID_NAME; /* Cannot remove the origin directory */ } else { if (dj.obj.attr & AM_RDO) { res = FR_DENIED; /* Cannot remove R/O object */ } } if (res == FR_OK) { #if _FS_EXFAT obj.fs = fs; if (fs->fs_type == FS_EXFAT) { obj.sclust = dclst = ld_dword(fs->dirbuf + XDIR_FstClus); obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize); obj.stat = fs->dirbuf[XDIR_GenFlags] & 2; } else #endif { dclst = ld_clust(fs, dj.dir); } if (dj.obj.attr & AM_DIR) { /* Is it a sub-directory ? */ #if _FS_RPATH != 0 if (dclst == fs->cdir) { /* Is it the current directory? */ res = FR_DENIED; } else #endif { sdj.obj.fs = fs; /* Open the sub-directory */ sdj.obj.sclust = dclst; #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { sdj.obj.objsize = obj.objsize; sdj.obj.stat = obj.stat; } #endif res = dir_sdi(&sdj, 0); if (res == FR_OK) { res = dir_read(&sdj, 0); /* Read an item */ if (res == FR_OK) res = FR_DENIED; /* Not empty? */ if (res == FR_NO_FILE) res = FR_OK; /* Empty? */ } } } } if (res == FR_OK) { res = dir_remove(&dj); /* Remove the directory entry */ if (res == FR_OK && dclst) { /* Remove the cluster chain if exist */ #if _FS_EXFAT res = remove_chain(&obj, dclst, 0); #else res = remove_chain(&dj.obj, dclst, 0); #endif } if (res == FR_OK) res = sync_fs(fs); } } FREE_NAMBUF(); } LEAVE_FF(fs, res); } /*-----------------------------------------------------------------------*/ /* Create a Directory */ /*-----------------------------------------------------------------------*/ FRESULT f_mkdir ( const TCHAR* path /* Pointer to the directory path */ ) { FRESULT res; DIR dj; FATFS *fs; DEF_NAMBUF /* Get logical drive number */ res = find_volume(&path, &fs, FA_WRITE); dj.obj.fs = fs; if (res == FR_OK) { INIT_NAMBUF(fs); 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 */ DWORD dcl = create_chain(&dj.obj, 0); /* Allocate a cluster for the new directory table */ BYTE *dir; dj.obj.objsize = (DWORD)fs->csize * SS(fs); 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) res = sync_window(fs); /* Flush FAT */ DWORD tm = GET_FATTIME(); if (res == FR_OK) { /* Initialize the new directory table */ DWORD dsc = clust2sect(fs, dcl); dir = fs->win; mem_set(dir, 0, SS(fs)); if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) { mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */ dir[DIR_Name] = '.'; dir[DIR_Attr] = AM_DIR; st_dword(dir + DIR_ModTime, tm); st_clust(fs, dir, dcl); mem_cpy(dir + SZDIRE, dir, SZDIRE); /* Create ".." entry */ dir[SZDIRE + 1] = '.'; DWORD pcl = dj.obj.sclust; if (fs->fs_type == FS_FAT32 && pcl == fs->dirbase) pcl = 0; st_clust(fs, dir + SZDIRE, pcl); } for (UINT n = fs->csize; n; n--) { /* Write dot entries and clear following sectors */ fs->winsect = dsc++; fs->wflag = 1; res = sync_window(fs); if (res != FR_OK) break; mem_set(dir, 0, SS(fs)); } } if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */ if (res == FR_OK) { #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { /* Initialize directory entry block */ st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Created time */ st_dword(fs->dirbuf + XDIR_FstClus, dcl); /* Table start cluster */ st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)dj.obj.objsize); /* File size needs to be valid */ st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)dj.obj.objsize); fs->dirbuf[XDIR_GenFlags] = 3; /* Initialize the object flag (contiguous) */ fs->dirbuf[XDIR_Attr] = AM_DIR; /* Attribute */ res = store_xdir(&dj); } else #endif { dir = dj.dir; st_dword(dir + DIR_ModTime, tm); /* Created time */ st_clust(fs, dir, dcl); /* Table start cluster */ dir[DIR_Attr] = AM_DIR; /* Attribute */ fs->wflag = 1; } if (res == FR_OK) res = sync_fs(fs); } else { remove_chain(&dj.obj, dcl, 0); /* Could not register, remove cluster chain */ } } FREE_NAMBUF(); } LEAVE_FF(fs, res); } /*-----------------------------------------------------------------------*/ /* Rename a File/Directory */ /*-----------------------------------------------------------------------*/ FRESULT f_rename ( const TCHAR* path_old, /* Pointer to the object name to be renamed */ const TCHAR* path_new /* Pointer to the new name */ ) { FRESULT res; DIR djo, djn; FATFS *fs; BYTE buf[_FS_EXFAT ? SZDIRE * 2 : 24]; DEF_NAMBUF get_ldnumber(&path_new); /* Ignore drive number of new name */ res = find_volume(&path_old, &fs, FA_WRITE); /* Get logical drive number of the old object */ if (res == FR_OK) { djo.obj.fs = fs; INIT_NAMBUF(fs); res = follow_path(&djo, path_old); /* Check old object */ if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check validity of name */ #if _FS_LOCK != 0 if (res == FR_OK) res = chk_lock(&djo, 2); #endif if (res == FR_OK) { /* Object to be renamed is found */ #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { /* At exFAT */ mem_cpy(buf, fs->dirbuf, SZDIRE * 2); /* Save 85+C0 entry of old object */ mem_cpy(&djn, &djo, sizeof djo); res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */ if (res == FR_OK) { /* Is new name already in use by any other object? */ res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST; } 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) { BYTE nf = fs->dirbuf[XDIR_NumSec]; BYTE nn = fs->dirbuf[XDIR_NumName]; WORD nh = ld_word(fs->dirbuf + XDIR_NameHash); mem_cpy(fs->dirbuf, buf, SZDIRE * 2); fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn; st_word(fs->dirbuf + XDIR_NameHash, nh); /* Start of critical section where any interruption can cause a cross-link */ res = store_xdir(&djn); } } } else #endif { /* At FAT12/FAT16/FAT32 */ mem_cpy(buf, djo.dir + DIR_Attr, 21); /* Save information about the object except name */ mem_cpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */ res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */ if (res == FR_OK) { /* Is new name already in use by any other object? */ res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST; } 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) { BYTE *dir; dir = djn.dir; /* Copy information about object except name */ mem_cpy(dir + 13, buf + 2, 19); dir[DIR_Attr] = buf[0] | AM_ARC; fs->wflag = 1; if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) { /* Update .. entry in the sub-directory if needed */ DWORD dw = clust2sect(fs, ld_clust(fs, dir)); if (!dw) { res = FR_INT_ERR; } else { /* Start of critical section where any interruption can cause a cross-link */ res = move_window(fs, dw); dir = fs->win + SZDIRE * 1; /* Ptr to .. entry */ if (res == FR_OK && dir[1] == '.') { st_clust(fs, dir, djn.obj.sclust); fs->wflag = 1; } } } } } } if (res == FR_OK) { res = dir_remove(&djo); /* Remove old entry */ if (res == FR_OK) { res = sync_fs(fs); } } /* End of critical section */ } FREE_NAMBUF(); } LEAVE_FF(fs, res); } #endif /* !_FS_READONLY */ #endif /* _FS_MINIMIZE == 0 */ #endif /* _FS_MINIMIZE <= 1 */ #endif /* _FS_MINIMIZE <= 2 */ #if _USE_CHMOD && !_FS_READONLY /*-----------------------------------------------------------------------*/ /* 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; DIR dj; FATFS *fs; DEF_NAMBUF res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive number */ dj.obj.fs = fs; if (res == FR_OK) { INIT_NAMBUF(fs); res = follow_path(&dj, path); /* Follow the file path */ if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */ if (res == FR_OK) { mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask); /* Apply attribute change */ res = store_xdir(&dj); } else #endif { dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ fs->wflag = 1; } if (res == FR_OK) res = sync_fs(fs); } FREE_NAMBUF(); } LEAVE_FF(fs, res); } /*-----------------------------------------------------------------------*/ /* Change Timestamp */ /*-----------------------------------------------------------------------*/ FRESULT f_utime ( const TCHAR* path, /* Pointer to the file/directory name */ const FILINFO* fno /* Pointer to the time stamp to be set */ ) { FRESULT res; DIR dj; FATFS *fs; DEF_NAMBUF res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive number */ dj.obj.fs = fs; if (res == FR_OK) { INIT_NAMBUF(fs); res = follow_path(&dj, path); /* Follow the file path */ if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */ if (res == FR_OK) { #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime); res = store_xdir(&dj); } else #endif { st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime); fs->wflag = 1; } if (res == FR_OK) res = sync_fs(fs); } FREE_NAMBUF(); } LEAVE_FF(fs, res); } #endif /* _USE_CHMOD && !_FS_READONLY */ #if _USE_LABEL /*-----------------------------------------------------------------------*/ /* Get Volume Label */ /*-----------------------------------------------------------------------*/ FRESULT f_getlabel ( const TCHAR* path, /* Path name of the logical drive number */ TCHAR* label, /* Pointer to a buffer to return the volume label */ DWORD* vsn /* Pointer to a variable to return the volume serial number */ ) { FRESULT res; DIR dj; FATFS *fs; size_t di; /* Get logical drive number */ res = find_volume(&path, &fs, 0); /* Get volume label */ if (res == FR_OK && label) { dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */ res = dir_sdi(&dj, 0); if (res == FR_OK) { res = dir_read(&dj, 1); /* Find a volume label entry */ if (res == FR_OK) { size_t si; #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { for (si = di = 0; si < dj.dir[XDIR_NumLabel]; si++) { /* Extract volume label from 83 entry */ WCHAR w = ld_word(dj.dir + XDIR_Label + si * 2); #if _LFN_UNICODE label[di++] = w; #else w = ff_convert(w, 0); /* Unicode -> OEM */ if (w == 0) w = '?'; /* Replace wrong character */ if (_DF1S && w >= 0x100) label[di++] = (char)(w >> 8); label[di++] = (char)w; #endif } label[di] = 0; } else #endif { si = di = 0; /* Extract volume label from AM_VOL entry with code comversion */ do { #if _LFN_UNICODE WCHAR w = (si < 11) ? dj.dir[si++] : ' '; if (IsDBCS1(w) && si < 11 && IsDBCS2(dj.dir[si])) { w = w << 8 | dj.dir[si++]; } label[di++] = ff_convert(w, 1); /* OEM -> Unicode */ #else label[di++] = dj.dir[si++]; #endif } while (di < 11); do { /* Truncate trailing spaces */ label[di] = 0; if (di == 0) break; } while (label[--di] == ' '); } } } if (res == FR_NO_FILE) { /* No label entry and return nul string */ label[0] = 0; res = FR_OK; } } /* Get volume serial number */ if (res == FR_OK && vsn) { res = move_window(fs, fs->volbase); if (res == FR_OK) { switch (fs->fs_type) { case FS_EXFAT: di = BPB_VolIDEx; break; case FS_FAT32: di = BS_VolID32; break; default: di = BS_VolID; } *vsn = ld_dword(fs->win + di); } } LEAVE_FF(fs, res); } #if !_FS_READONLY /*-----------------------------------------------------------------------*/ /* Set Volume Label */ /*-----------------------------------------------------------------------*/ FRESULT f_setlabel ( const TCHAR* label /* Pointer to the volume label to set */ ) { FRESULT res; DIR dj; FATFS *fs; BYTE dirvn[22]; size_t i; UINT j; size_t slen; WCHAR w; static const char badchr[] = "\"*+,.:;<=>\?[]|\x7F"; /* Get logical drive number */ res = find_volume(&label, &fs, FA_WRITE); if (res != FR_OK) LEAVE_FF(fs, res); dj.obj.fs = fs; /* Get length of given volume label */ for (slen = 0; (UINT)label[slen] >= ' '; slen++) ; /* Get name length */ #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { /* At the exFAT */ for (i = j = 0; i < slen; ) { /* Create volume label in directory form */ w = label[i++]; #if !_LFN_UNICODE if (IsDBCS1(w)) { w = (i < slen && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0; } w = ff_convert(w, 1); #endif if (w == 0 || chk_chr(badchr, w) || j == 22) { /* Check validity check validity of the volume label */ LEAVE_FF(fs, FR_INVALID_NAME); } st_word(dirvn + j, w); j += 2; } slen = j; } else #endif { /* At the FAT12/16/32 */ for ( ; slen && label[slen - 1] == ' '; slen--) ; /* Remove trailing spaces */ if (slen) { /* Is there a volume label to be set? */ dirvn[0] = 0; i = j = 0; /* Create volume label in directory form */ do { #if _LFN_UNICODE w = ff_convert(ff_wtoupper(label[i++]), 0); #else w = (BYTE)label[i++]; if (IsDBCS1(w)) { w = (j < 10 && i < slen && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0; } #if _USE_LFN != 0 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 == 0 || chk_chr(badchr, w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) { /* Reject invalid characters for volume label */ LEAVE_FF(fs, FR_INVALID_NAME); } if (w >= 0x100) dirvn[j++] = (BYTE)(w >> 8); dirvn[j++] = (BYTE)w; } while (i < slen); while (j < 11) dirvn[j++] = ' '; /* Fill remaining name field */ if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */ } } /* Set volume label */ dj.obj.sclust = 0; /* Open root directory */ res = dir_sdi(&dj, 0); if (res == FR_OK) { res = dir_read(&dj, 1); /* Get volume label entry */ if (res == FR_OK) { if (_FS_EXFAT && fs->fs_type == FS_EXFAT) { dj.dir[XDIR_NumLabel] = slen / 2; /* Change the volume label */ mem_cpy(dj.dir + XDIR_Label, dirvn, slen); } else { if (slen) { mem_cpy(dj.dir, dirvn, 11); /* Change the volume label */ } else { dj.dir[DIR_Name] = DDEM; /* Remove the volume label */ } } fs->wflag = 1; res = sync_fs(fs); } else { /* No volume label entry is found or error */ if (res == FR_NO_FILE) { res = FR_OK; if (slen) { /* Create a volume label entry */ res = dir_alloc(&dj, 1); /* Allocate an entry */ if (res == FR_OK) { mem_set(dj.dir, 0, SZDIRE); /* Clear the entry */ if (_FS_EXFAT && fs->fs_type == FS_EXFAT) { dj.dir[XDIR_Type] = 0x83; /* Create 83 entry */ dj.dir[XDIR_NumLabel] = slen / 2; mem_cpy(dj.dir + XDIR_Label, dirvn, slen); } else { dj.dir[DIR_Attr] = AM_VOL; /* Create volume label entry */ mem_cpy(dj.dir, dirvn, 11); } fs->wflag = 1; res = sync_fs(fs); } } } } } LEAVE_FF(fs, res); } #endif /* !_FS_READONLY */ #endif /* _USE_LABEL */ #if _USE_EXPAND && !_FS_READONLY /*-----------------------------------------------------------------------*/ /* Allocate a Contiguous Blocks to the File */ /*-----------------------------------------------------------------------*/ FRESULT f_expand ( FIL* fp, /* Pointer to the file object */ FSIZE_t fsz, /* File size to be expanded to */ BYTE opt /* Operation mode 0:Find and prepare or 1:Find and allocate */ ) { FRESULT res; FATFS *fs; DWORD n, stcl, scl, tcl, lclst; res = validate(fp, &fs); /* Check validity of the object */ if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); #if _FS_EXFAT if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED); /* Check if in size limit */ #endif n = (DWORD)fs->csize * SS(fs); /* Cluster size */ tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0); /* Number of clusters required */ stcl = fs->last_clst; lclst = 0; if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2; #if _FS_EXFAT if (fs->fs_type == FS_EXFAT) { scl = find_bitmap(fs, stcl, tcl); /* Find a contiguous cluster block */ if (scl == 0) res = FR_DENIED; /* No contiguous cluster block was found */ if (scl == 0xFFFFFFFF) res = FR_DISK_ERR; if (res == FR_OK) { if (opt) { res = change_bitmap(fs, scl, tcl, 1); /* Mark the cluster block 'in use' */ lclst = scl + tcl - 1; } else { lclst = scl - 1; } } } else #endif { DWORD clst = stcl; scl = stcl; DWORD ncl = 0; for (;;) { /* Find a contiguous cluster block */ n = get_fat(&fp->obj, clst); if (++clst >= fs->n_fatent) clst = 2; if (n == 1) { res = FR_INT_ERR; break; } if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } if (n == 0) { /* Is it a free cluster? */ if (++ncl == tcl) break; /* Break if a contiguous cluster block is found */ } else { scl = clst; ncl = 0; /* Not a free cluster */ } if (clst == stcl) { res = FR_DENIED; break; } /* No contiguous cluster? */ } if (res == FR_OK) { if (opt) { for (clst = scl, n = tcl; n; clst++, n--) { /* Create a cluster chain on the FAT */ res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1); if (res != FR_OK) break; lclst = clst; } } else { lclst = scl - 1; } } } if (res == FR_OK) { fs->last_clst = lclst; /* Set suggested start cluster to start next */ if (opt) { fp->obj.sclust = scl; /* Update object allocation information */ fp->obj.objsize = fsz; if (_FS_EXFAT) fp->obj.stat = 2; /* Set status 'contiguous chain' */ fp->flag |= FA_MODIFIED; if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */ fs->free_clst -= tcl; fs->fsi_flag |= 1; } } } LEAVE_FF(fs, res); } #endif /* _USE_EXPAND && !_FS_READONLY */ #if _USE_FORWARD /*-----------------------------------------------------------------------*/ /* Forward data to the stream directly */ /*-----------------------------------------------------------------------*/ 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; FATFS *fs; DWORD clst, sect; FSIZE_t remain; UINT rcnt, csect; BYTE *dbuf; *bf = 0; /* Clear transfer byte counter */ res = validate(fp, &fs); /* Check validity of the object */ if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ remain = fp->obj.objsize - 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 goes busy */ fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) { csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */ if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ if (csect == 0) { /* On the cluster boundary? */ clst = (fp->fptr == 0) ? /* On the top of the file? */ fp->obj.sclust : get_fat(&fp->obj, fp->clust); if (clst <= 1) ABORT(fs, FR_INT_ERR); if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); fp->clust = clst; /* Update current cluster */ } } sect = clust2sect(fs, fp->clust); /* Get current data sector */ if (!sect) ABORT(fs, FR_INT_ERR); sect += csect; #if _FS_TINY if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window to the file data */ dbuf = fs->win; #else if (fp->sect != sect) { /* Fill sector cache with file data */ #if !_FS_READONLY if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); fp->flag &= ~FA_DIRTY; } #endif if (disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); } dbuf = fp->buf; #endif fp->sect = sect; rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */ if (rcnt > btf) rcnt = btf; /* Clip it by btr if needed */ rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt); /* Forward the file data */ if (!rcnt) ABORT(fs, FR_INT_ERR); } LEAVE_FF(fs, FR_OK); } #endif /* _USE_FORWARD */ #if _USE_MKFS && !_FS_READONLY /*-----------------------------------------------------------------------*/ /* Create FAT file system on the logical drive */ /*-----------------------------------------------------------------------*/ FRESULT f_mkfs ( const TCHAR* path, /* Logical drive number */ BYTE opt, /* Format option */ DWORD au, /* Size of allocation unit [byte] */ void* work, /* Pointer to working buffer */ UINT len /* Size of working buffer */ ) { const UINT n_fats = 1; /* Number of FATs for FAT12/16/32 volume (1 or 2) */ const UINT n_rootdir = 512; /* Number of root directory entries for FAT12/16 volume */ static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0}; /* Cluster size boundary for FAT12/16 volume (4Ks unit) */ static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0}; /* Cluster size boundary for FAT32 volume (128Ks unit) */ BYTE fmt, sys, *buf, *pte, pdrv, part; WORD ss; DWORD szb_buf, sz_buf, sz_blk, n_clst, pau, sect, nsect, n; DWORD b_vol, b_fat, b_data; /* Base LBA for volume, fat, data */ DWORD sz_vol, sz_rsv, sz_fat, sz_dir; /* Size for volume, fat, dir, data */ UINT i; int vol; DSTATUS stat; #if _USE_TRIM || _FS_EXFAT DWORD tbl[3]; #endif /* Check mounted drive and clear work area */ vol = get_ldnumber(&path); /* Get target logical drive */ if (vol < 0) return FR_INVALID_DRIVE; if (FatFs[vol]) FatFs[vol]->fs_type = 0; /* Clear mounted volume */ pdrv = LD2PD(vol); /* Physical drive */ part = LD2PT(vol); /* Partition (0:create as new, 1-4:get from partition table) */ /* Check physical drive status */ 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_BLOCK_SIZE, &sz_blk) != RES_OK || !sz_blk || sz_blk > 32768 || (sz_blk & (sz_blk - 1))) sz_blk = 1; /* Erase block to align data area */ #if _MAX_SS != _MIN_SS /* Get sector size of the medium */ if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR; if (ss > _MAX_SS || ss < _MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR; #else ss = _MAX_SS; #endif if ((au != 0 && au < ss) || au > 0x1000000 || (au & (au - 1))) return FR_INVALID_PARAMETER; /* Check if au is valid */ au /= ss; /* Cluster size in unit of sector */ /* Get working buffer */ buf = (BYTE*)work; /* Working buffer */ sz_buf = len / ss; /* Size of working buffer (sector) */ szb_buf = sz_buf * ss; /* Size of working buffer (byte) */ if (!szb_buf) return FR_MKFS_ABORTED; /* Determine where the volume to be located (b_vol, sz_vol) */ if (_MULTI_PARTITION && part != 0) { /* Get partition information from partition table in the MBR */ if (disk_read(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Load MBR */ if (ld_word(buf + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED; /* Check if MBR is valid */ pte = buf + (MBR_Table + (part - 1) * SZ_PTE); if (!pte[PTE_System]) return FR_MKFS_ABORTED; /* No partition? */ b_vol = ld_dword(pte + PTE_StLba); /* Get volume start sector */ sz_vol = ld_dword(pte + PTE_SizLba); /* Get volume size */ } else { /* Create a single-partition in this function */ if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) return FR_DISK_ERR; b_vol = (opt & FM_SFD) ? 0 : 63; /* Volume start sector */ if (sz_vol < b_vol) return FR_MKFS_ABORTED; sz_vol -= b_vol; /* Volume size */ } if (sz_vol < 128) return FR_MKFS_ABORTED; /* Check if volume size is >=128s */ /* Pre-determine the FAT type */ do { if (_FS_EXFAT && (opt & FM_EXFAT)) { /* exFAT possible? */ if ((opt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || au > 128) { /* exFAT only, vol >= 64Ms or au > 128s ? */ fmt = FS_EXFAT; break; } } if (au > 128) return FR_INVALID_PARAMETER; /* Too large au for FAT/FAT32 */ if (opt & FM_FAT32) { /* FAT32 possible? */ if ((opt & FM_ANY) == FM_FAT32 || !(opt & FM_FAT)) { /* FAT32 only or no-FAT? */ fmt = FS_FAT32; break; } } if (!(opt & FM_FAT)) return FR_INVALID_PARAMETER; /* no-FAT? */ fmt = FS_FAT16; } while (0); #if _FS_EXFAT if (fmt == FS_EXFAT) { /* Create an exFAT volume */ DWORD szb_bit, szb_case, sum, nb, cl; WCHAR ch, si; UINT j, st; BYTE b; if (sz_vol < 0x1000) return FR_MKFS_ABORTED; /* Too small volume? */ #if _USE_TRIM tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area can be erased */ disk_ioctl(pdrv, CTRL_TRIM, tbl); #endif /* Determine FAT location, data location and number of clusters */ if (!au) { /* au auto-selection */ au = 8; if (sz_vol >= 0x80000) au = 64; /* >= 512Ks */ if (sz_vol >= 0x4000000) au = 256; /* >= 64Ms */ } b_fat = b_vol + 32; /* FAT start at offset 32 */ sz_fat = ((sz_vol / au + 2) * 4 + ss - 1) / ss; /* Number of FAT sectors */ b_data = (b_fat + sz_fat + sz_blk - 1) & ~(sz_blk - 1); /* Align data area to the erase block boundary */ if (b_data >= sz_vol / 2) return FR_MKFS_ABORTED; /* Too small volume? */ n_clst = (sz_vol - (b_data - b_vol)) / au; /* Number of clusters */ if (n_clst <16) return FR_MKFS_ABORTED; /* Too few clusters? */ if (n_clst > MAX_EXFAT) return FR_MKFS_ABORTED; /* Too many clusters? */ szb_bit = (n_clst + 7) / 8; /* Size of allocation bitmap */ tbl[0] = (szb_bit + au * ss - 1) / (au * ss); /* Number of allocation bitmap clusters */ /* Create a compressed up-case table */ sect = b_data + au * tbl[0]; /* Table start sector */ sum = 0; /* Table checksum to be stored in the 82 entry */ st = si = i = j = szb_case = 0; do { switch (st) { case 0: ch = ff_wtoupper(si); /* Get an up-case char */ if (ch != si) { si++; break; /* Store the up-case char if exist */ } for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ; /* Get run length of no-case block */ if (j >= 128) { ch = 0xFFFF; st = 2; break; /* Compress the no-case block if run is >= 128 */ } st = 1; /* Do not compress short run */ /* continue */ case 1: ch = si++; /* Fill the short run */ if (--j == 0) st = 0; break; default: ch = (WCHAR)j; si += j; /* Number of chars to skip */ st = 0; } sum = xsum32(buf[i + 0] = (BYTE)ch, sum); /* Put it into the write buffer */ sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum); i += 2; szb_case += 2; if (!si || i == szb_buf) { /* Write buffered data when buffer full or end of process */ n = (i + ss - 1) / ss; if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR; sect += n; i = 0; } } while (si); tbl[1] = (szb_case + au * ss - 1) / (au * ss); /* Number of up-case table clusters */ tbl[2] = 1; /* Number of root dir clusters */ /* Initialize the allocation bitmap */ sect = b_data; nsect = (szb_bit + ss - 1) / ss; /* Start of bitmap and number of sectors */ nb = tbl[0] + tbl[1] + tbl[2]; /* Number of clusters in-use by system */ do { mem_set(buf, 0, szb_buf); for (i = 0; nb >= 8 && i < szb_buf; buf[i++] = 0xFF, nb -= 8) ; for (b = 1; nb && i < szb_buf; buf[i] |= b, b <<= 1, nb--) ; n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */ if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR; sect += n; nsect -= n; } while (nsect); /* Initialize the FAT */ sect = b_fat; nsect = sz_fat; /* Start of FAT and number of FAT sectors */ j = nb = cl = 0; do { mem_set(buf, 0, szb_buf); i = 0; /* Clear work area and reset write index */ if (cl == 0) { /* Set entry 0 and 1 */ st_dword(buf + i, 0xFFFFFFF8); i += 4; cl++; st_dword(buf + i, 0xFFFFFFFF); i += 4; cl++; } do { /* Create chains of bitmap, up-case and root dir */ while (nb && i < szb_buf) { /* Create a chain */ st_dword(buf + i, (nb > 1) ? cl + 1 : 0xFFFFFFFF); i += 4; cl++; nb--; } if (!nb && j < 3) nb = tbl[j++]; /* Next chain */ } while (nb && i < szb_buf); n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */ if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR; sect += n; nsect -= n; } while (nsect); /* Initialize the root directory */ mem_set(buf, 0, szb_buf); buf[SZDIRE * 0 + 0] = 0x83; /* 83 entry (volume label) */ buf[SZDIRE * 1 + 0] = 0x81; /* 81 entry (allocation bitmap) */ st_dword(buf + SZDIRE * 1 + 20, 2); st_dword(buf + SZDIRE * 1 + 24, szb_bit); buf[SZDIRE * 2 + 0] = 0x82; /* 82 entry (up-case table) */ st_dword(buf + SZDIRE * 2 + 4, sum); st_dword(buf + SZDIRE * 2 + 20, 2 + tbl[0]); st_dword(buf + SZDIRE * 2 + 24, szb_case); sect = b_data + au * (tbl[0] + tbl[1]); nsect = au; /* Start of the root directory and number of sectors */ do { /* Fill root directory sectors */ n = (nsect > sz_buf) ? sz_buf : nsect; if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR; mem_set(buf, 0, ss); sect += n; nsect -= n; } while (nsect); /* Create two set of the exFAT VBR blocks */ sect = b_vol; for (n = 0; n < 2; n++) { /* Main record (+0) */ mem_set(buf, 0, ss); mem_cpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11); /* Boot jump code (x86), OEM name */ st_dword(buf + BPB_VolOfsEx, b_vol); /* Volume offset in the physical drive [sector] */ st_dword(buf + BPB_TotSecEx, sz_vol); /* Volume size [sector] */ st_dword(buf + BPB_FatOfsEx, b_fat - b_vol); /* FAT offset [sector] */ st_dword(buf + BPB_FatSzEx, sz_fat); /* FAT size [sector] */ st_dword(buf + BPB_DataOfsEx, b_data - b_vol); /* Data offset [sector] */ st_dword(buf + BPB_NumClusEx, n_clst); /* Number of clusters */ st_dword(buf + BPB_RootClusEx, 2 + tbl[0] + tbl[1]); /* Root dir cluster # */ st_dword(buf + BPB_VolIDEx, GET_FATTIME()); /* VSN */ st_word(buf + BPB_FSVerEx, 0x100); /* File system version (1.00) */ for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ; /* Log2 of sector size [byte] */ for (buf[BPB_SecPerClusEx] = 0, i = au; i >>= 1; buf[BPB_SecPerClusEx]++) ; /* Log2 of cluster size [sector] */ buf[BPB_NumFATsEx] = 1; /* Number of FATs */ buf[BPB_DrvNumEx] = 0x80; /* Drive number (for int13) */ st_word(buf + BS_BootCodeEx, 0xFEEB); /* Boot code (x86) */ st_word(buf + BS_55AA, 0xAA55); /* Signature (placed here regardless of sector size) */ for (i = sum = 0; i < ss; i++) { /* VBR checksum */ if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum); } if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR; /* Extended bootstrap record (+1..+8) */ mem_set(buf, 0, ss); st_word(buf + ss - 2, 0xAA55); /* Signature (placed at end of sector) */ for (j = 1; j < 9; j++) { for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */ if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR; } /* OEM/Reserved record (+9..+10) */ mem_set(buf, 0, ss); for ( ; j < 11; j++) { for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */ if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR; } /* Sum record (+11) */ for (i = 0; i < ss; i += 4) st_dword(buf + i, sum); /* Fill with checksum value */ if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR; } } else #endif /* _FS_EXFAT */ { /* Create an FAT12/16/32 volume */ do { pau = au; /* Pre-determine number of clusters and FAT sub-type */ if (fmt == FS_FAT32) { /* FAT32 volume */ if (!pau) { /* au auto-selection */ n = sz_vol / 0x20000; /* Volume size in unit of 128KS */ for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ; /* Get from table */ } n_clst = sz_vol / pau; /* Number of clusters */ sz_fat = (n_clst * 4 + 8 + ss - 1) / ss; /* FAT size [sector] */ sz_rsv = 32; /* Number of reserved sectors */ sz_dir = 0; /* No static directory */ if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) return FR_MKFS_ABORTED; } else { /* FAT12/16 volume */ if (!pau) { /* au auto-selection */ n = sz_vol / 0x1000; /* Volume size in unit of 4KS */ for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ; /* Get from table */ } n_clst = sz_vol / pau; if (n_clst > MAX_FAT12) { n = n_clst * 2 + 4; /* FAT size [byte] */ } else { fmt = FS_FAT12; n = (n_clst * 3 + 1) / 2 + 3; /* FAT size [byte] */ } sz_fat = (n + ss - 1) / ss; /* FAT size [sector] */ sz_rsv = 1; /* Number of reserved sectors */ sz_dir = (DWORD)n_rootdir * SZDIRE / ss; /* Rootdir size [sector] */ } b_fat = b_vol + sz_rsv; /* FAT base */ b_data = b_fat + sz_fat * n_fats + sz_dir; /* Data base */ /* Align data base to erase block boundary (for flash memory media) */ n = ((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data; /* Next nearest erase block from current data base */ if (fmt == FS_FAT32) { /* FAT32: Move FAT base */ sz_rsv += n; b_fat += n; } else { /* FAT12/16: Expand FAT size */ sz_fat += n / n_fats; } /* Determine number of clusters and final check of validity of the FAT sub-type */ if (sz_vol < b_data + pau * 16 - b_vol) return FR_MKFS_ABORTED; /* Too small volume */ n_clst = (sz_vol - sz_rsv - sz_fat * n_fats - sz_dir) / pau; if (fmt == FS_FAT32) { if (n_clst <= MAX_FAT16) { /* Too few clusters for FAT32 */ if (!au && (au = pau / 2) != 0) continue; /* Adjust cluster size and retry */ return FR_MKFS_ABORTED; } } if (fmt == FS_FAT16) { if (n_clst > MAX_FAT16) { /* Too many clusters for FAT16 */ if (!au && (pau * 2) <= 64) { au = pau * 2; continue; /* Adjust cluster size and retry */ } if ((opt & FM_FAT32)) { fmt = FS_FAT32; continue; /* Switch type to FAT32 and retry */ } if (!au && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */ return FR_MKFS_ABORTED; } if (n_clst <= MAX_FAT12) { /* Too few clusters for FAT16 */ if (!au && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */ return FR_MKFS_ABORTED; } } if (fmt == FS_FAT12 && n_clst > MAX_FAT12) return FR_MKFS_ABORTED; /* Too many clusters for FAT12 */ /* Ok, it is the valid cluster configuration */ break; } while (1); #if _USE_TRIM tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area can be erased */ disk_ioctl(pdrv, CTRL_TRIM, tbl); #endif /* Create FAT VBR */ mem_set(buf, 0, ss); mem_cpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code (x86), OEM name */ st_word(buf + BPB_BytsPerSec, ss); /* Sector size [byte] */ buf[BPB_SecPerClus] = (BYTE)pau; /* Cluster size [sector] */ st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv); /* Size of reserved area */ buf[BPB_NumFATs] = n_fats; /* Number of FATs */ st_word(buf + BPB_RootEntCnt, (WORD)((fmt == FS_FAT32) ? 0 : n_rootdir)); /* Number of root directory entries */ if (sz_vol < 0x10000) { st_word(buf + BPB_TotSec16, (WORD)sz_vol); /* Volume size in 16-bit LBA */ } else { st_dword(buf + BPB_TotSec32, sz_vol); /* Volume size in 32-bit LBA */ } buf[BPB_Media] = 0xF8; /* Media descriptor byte */ st_word(buf + BPB_SecPerTrk, 63); /* Number of sectors per track (for int13) */ st_word(buf + BPB_NumHeads, 255); /* Number of heads (for int13) */ st_dword(buf + BPB_HiddSec, b_vol); /* Volume offset in the physical drive [sector] */ if (fmt == FS_FAT32) { st_dword(buf + BS_VolID32, GET_FATTIME()); /* VSN */ st_dword(buf + BPB_FATSz32, sz_fat); /* FAT size [sector] */ st_dword(buf + BPB_RootClus32, 2); /* Root directory cluster # (2) */ st_word(buf + BPB_FSInfo32, 1); /* Offset of FSINFO sector (VBR + 1) */ st_word(buf + BPB_BkBootSec32, 6); /* Offset of backup VBR (VBR + 6) */ buf[BS_DrvNum32] = 0x80; /* Drive number (for int13) */ buf[BS_BootSig32] = 0x29; /* Extended boot signature */ mem_cpy(buf + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ } else { st_dword(buf + BS_VolID, GET_FATTIME()); /* VSN */ st_word(buf + BPB_FATSz16, (WORD)sz_fat); /* FAT size [sector] */ buf[BS_DrvNum] = 0x80; /* Drive number (for int13) */ buf[BS_BootSig] = 0x29; /* Extended boot signature */ mem_cpy(buf + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ } st_word(buf + BS_55AA, 0xAA55); /* Signature (offset is fixed here regardless of sector size) */ if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) return FR_DISK_ERR; /* Write it to the VBR sector */ /* Create FSINFO record if needed */ if (fmt == FS_FAT32) { disk_write(pdrv, buf, b_vol + 6, 1); /* Write backup VBR (VBR + 6) */ mem_set(buf, 0, ss); st_dword(buf + FSI_LeadSig, 0x41615252); st_dword(buf + FSI_StrucSig, 0x61417272); st_dword(buf + FSI_Free_Count, n_clst - 1); /* Number of free clusters */ st_dword(buf + FSI_Nxt_Free, 2); /* Last allocated cluster# */ st_word(buf + BS_55AA, 0xAA55); disk_write(pdrv, buf, b_vol + 7, 1); /* Write backup FSINFO (VBR + 7) */ disk_write(pdrv, buf, b_vol + 1, 1); /* Write original FSINFO (VBR + 1) */ } /* Initialize FAT area */ mem_set(buf, 0, szb_buf); sect = b_fat; /* FAT start sector */ for (i = 0; i < n_fats; i++) { /* Initialize FATs each */ if (fmt == FS_FAT32) { st_dword(buf + 0, 0xFFFFFFF8); /* Entry 0 */ st_dword(buf + 4, 0xFFFFFFFF); /* Entry 1 */ st_dword(buf + 8, 0x0FFFFFFF); /* Entry 2 (root directory) */ } else { st_dword(buf + 0, (fmt == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8); /* Entry 0 and 1 */ } nsect = sz_fat; /* Number of FAT sectors */ do { /* Fill FAT sectors */ n = (nsect > sz_buf) ? sz_buf : nsect; if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR; mem_set(buf, 0, ss); sect += n; nsect -= n; } while (nsect); } /* Initialize root directory (fill with zero) */ nsect = (fmt == FS_FAT32) ? pau : sz_dir; /* Number of root directory sectors */ do { n = (nsect > sz_buf) ? sz_buf : nsect; if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR; sect += n; nsect -= n; } while (nsect); } /* Determine system ID in the partition table */ if (_FS_EXFAT && fmt == FS_EXFAT) { sys = 0x07; /* HPFS/NTFS/exFAT */ } else { if (fmt == FS_FAT32) { sys = 0x0C; /* FAT32X */ } else { if (sz_vol >= 0x10000) { sys = 0x06; /* FAT12/16 (>=64KS) */ } else { sys = (fmt == FS_FAT16) ? 0x04 : 0x01; /* FAT16 (<64KS) : FAT12 (<64KS) */ } } } if (_MULTI_PARTITION && part != 0) { /* Update system ID in the partition table */ if (disk_read(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Read the MBR */ buf[MBR_Table + (part - 1) * SZ_PTE + PTE_System] = sys; /* Set system type */ if (disk_write(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Write it back to the MBR */ } else { if (!(opt & FM_SFD)) { /* Create partition table in FDISK format */ mem_set(buf, 0, ss); st_word(buf + BS_55AA, 0xAA55); /* MBR signature */ pte = buf + MBR_Table; /* Create partition table for single partition in the drive */ pte[PTE_Boot] = 0; /* Boot indicator */ pte[PTE_StHead] = 1; /* Start head */ pte[PTE_StSec] = 1; /* Start sector */ pte[PTE_StCyl] = 0; /* Start cylinder */ pte[PTE_System] = sys; /* System type */ n = (b_vol + sz_vol) / (63 * 255); /* (End CHS is incorrect) */ pte[PTE_EdHead] = 254; /* End head */ pte[PTE_EdSec] = (BYTE)(n >> 2 | 63); /* End sector */ pte[PTE_EdCyl] = (BYTE)n; /* End cylinder */ st_dword(pte + PTE_StLba, b_vol); /* Start offset in LBA */ st_dword(pte + PTE_SizLba, sz_vol); /* Size in sectors */ if (disk_write(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Write it to the MBR */ } } if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) return FR_DISK_ERR; return FR_OK; } #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 the CHS without any care 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 _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 /*-----------------------------------------------------------------------*/ /* Put a character to the file */ /*-----------------------------------------------------------------------*/ typedef struct { FIL *fp; /* Ptr to the writing file */ int idx, nchr; /* Write index of buf[] (-1:error), number of chars written */ BYTE buf[64]; /* Write buffer */ } putbuff; static void putc_bfd ( /* Buffered write with code conversion */ putbuff* pb, TCHAR c ) { UINT bw; int i; if (_USE_STRFUNC == 2 && c == '\n') { /* LF -> CRLF conversion */ putc_bfd(pb, '\r'); } i = pb->idx; /* Write index of pb->buf[] */ if (i < 0) return; #if _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++; } static int putc_flush ( /* Flush left characters in the buffer */ putbuff* pb ) { UINT nw; 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; } static void putc_init ( /* Initialize write buffer */ putbuff* pb, FIL* fp ) { pb->fp = fp; pb->nchr = pb->idx = 0; } int f_putc ( TCHAR c, /* A character to be output */ FIL* fp /* Pointer to the file object */ ) { putbuff pb; putc_init(&pb, fp); putc_bfd(&pb, c); /* Put the character */ return putc_flush(&pb); } /*-----------------------------------------------------------------------*/ /* 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; putc_init(&pb, fp); while (*str) putc_bfd(&pb, *str++); /* Put the string */ return putc_flush(&pb); } /*-----------------------------------------------------------------------*/ /* 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; putbuff pb; BYTE f, r; UINT i, j, w; DWORD v; TCHAR c, d, str[32], *p; putc_init(&pb, fp); 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; str[i++] = d + '0'; } while (v && i < sizeof str / sizeof str[0]); if (f & 8) str[i++] = '-'; j = i; d = (f & 1) ? '0' : ' '; while (!(f & 2) && j++ < w) putc_bfd(&pb, d); do putc_bfd(&pb, str[--i]); while (i); while (j++ < w) putc_bfd(&pb, d); } va_end(arp); return putc_flush(&pb); } #endif /* !_FS_READONLY */ #endif /* _USE_STRFUNC */