1 /*----------------------------------------------------------------------------/ 2 / FatFs - FAT file system module R0.11a (C)ChaN, 2015 / 3 /-----------------------------------------------------------------------------/ 4 / FatFs module is a free software that opened under license policy of 5 / following conditions. 6 / 7 / Copyright (C) 2015, ChaN, all right reserved. 8 / 9 / 1. Redistributions of source code must retain the above copyright notice, 10 / this condition and the following disclaimer. 11 / 12 / This software is provided by the copyright holder and contributors "AS IS" 13 / and any warranties related to this software are DISCLAIMED. 14 / The copyright owner or contributors be NOT LIABLE for any damages caused 15 / by use of this software. 16 /----------------------------------------------------------------------------*/ 17 18 19 #include "ff.h" /* Declarations of FatFs API */ 20 #include "diskio.h" /* Declarations of disk I/O functions */ 21 22 23 /*-------------------------------------------------------------------------- 24 25 Module Private Definitions 26 27 ---------------------------------------------------------------------------*/ 28 29 #if _FATFS != 64180 /* Revision ID */ 30 #error Wrong include file (ff.h). 31 #endif 32 33 34 /* Reentrancy related */ 35 #if _FS_REENTRANT 36 #if _USE_LFN == 1 37 #error Static LFN work area cannot be used at thread-safe configuration 38 #endif 39 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; } 40 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } 41 #else 42 #define ENTER_FF(fs) 43 #define LEAVE_FF(fs, res) return res 44 #endif 45 46 #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); } 47 48 49 /* Definitions of sector size */ 50 #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) 51 #error Wrong sector size configuration 52 #endif 53 #if _MAX_SS == _MIN_SS 54 #define SS(fs) ((UINT)_MAX_SS) /* Fixed sector size */ 55 #else 56 #define SS(fs) ((fs)->ssize) /* Variable sector size */ 57 #endif 58 59 60 /* Timestamp feature */ 61 #if _FS_NORTC == 1 62 #if _NORTC_YEAR < 1980 || _NORTC_YEAR > 2107 || _NORTC_MON < 1 || _NORTC_MON > 12 || _NORTC_MDAY < 1 || _NORTC_MDAY > 31 63 #error Invalid _FS_NORTC settings 64 #endif 65 #define GET_FATTIME() ((DWORD)(_NORTC_YEAR - 1980) << 25 | (DWORD)_NORTC_MON << 21 | (DWORD)_NORTC_MDAY << 16) 66 #else 67 #define GET_FATTIME() get_fattime() 68 #endif 69 70 71 /* File access control feature */ 72 #if _FS_LOCK 73 #if _FS_READONLY 74 #error _FS_LOCK must be 0 at read-only configuration 75 #endif 76 typedef struct { 77 FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */ 78 DWORD clu; /* Object ID 2, directory (0:root) */ 79 WORD idx; /* Object ID 3, directory index */ 80 WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */ 81 } FILESEM; 82 #endif 83 84 85 86 /* DBCS code ranges and SBCS upper conversion tables */ 87 88 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */ 89 #define _DF1S 0x81 /* DBC 1st byte range 1 start */ 90 #define _DF1E 0x9F /* DBC 1st byte range 1 end */ 91 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */ 92 #define _DF2E 0xFC /* DBC 1st byte range 2 end */ 93 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */ 94 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */ 95 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */ 96 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */ 97 98 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */ 99 #define _DF1S 0x81 100 #define _DF1E 0xFE 101 #define _DS1S 0x40 102 #define _DS1E 0x7E 103 #define _DS2S 0x80 104 #define _DS2E 0xFE 105 106 #elif _CODE_PAGE == 949 /* Korean */ 107 #define _DF1S 0x81 108 #define _DF1E 0xFE 109 #define _DS1S 0x41 110 #define _DS1E 0x5A 111 #define _DS2S 0x61 112 #define _DS2E 0x7A 113 #define _DS3S 0x81 114 #define _DS3E 0xFE 115 116 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */ 117 #define _DF1S 0x81 118 #define _DF1E 0xFE 119 #define _DS1S 0x40 120 #define _DS1E 0x7E 121 #define _DS2S 0xA1 122 #define _DS2E 0xFE 123 124 #elif _CODE_PAGE == 437 /* U.S. */ 125 #define _DF1S 0 126 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 127 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 128 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 129 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 130 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 131 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 132 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 133 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 134 135 #elif _CODE_PAGE == 720 /* Arabic */ 136 #define _DF1S 0 137 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 138 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 139 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 140 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 141 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 142 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 143 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 144 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 145 146 #elif _CODE_PAGE == 737 /* Greek */ 147 #define _DF1S 0 148 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 149 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \ 150 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \ 151 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 152 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 153 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 154 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 155 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 156 157 #elif _CODE_PAGE == 771 /* KBL */ 158 #define _DF1S 0 159 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 160 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 161 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 162 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 163 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 164 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \ 165 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 166 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF} 167 168 #elif _CODE_PAGE == 775 /* Baltic */ 169 #define _DF1S 0 170 #define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \ 171 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 172 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 173 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 174 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 175 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 176 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \ 177 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 178 179 #elif _CODE_PAGE == 850 /* Latin 1 */ 180 #define _DF1S 0 181 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \ 182 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \ 183 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 184 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 185 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 186 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \ 187 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \ 188 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 189 190 #elif _CODE_PAGE == 852 /* Latin 2 */ 191 #define _DF1S 0 192 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \ 193 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \ 194 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \ 195 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \ 196 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 197 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 198 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \ 199 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF} 200 201 #elif _CODE_PAGE == 855 /* Cyrillic */ 202 #define _DF1S 0 203 #define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \ 204 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \ 205 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \ 206 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \ 207 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 208 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \ 209 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \ 210 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF} 211 212 #elif _CODE_PAGE == 857 /* Turkish */ 213 #define _DF1S 0 214 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \ 215 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \ 216 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 217 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 218 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 219 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 220 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \ 221 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 222 223 #elif _CODE_PAGE == 860 /* Portuguese */ 224 #define _DF1S 0 225 #define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \ 226 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 227 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 228 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 229 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 230 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 231 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 232 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 233 234 #elif _CODE_PAGE == 861 /* Icelandic */ 235 #define _DF1S 0 236 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \ 237 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 238 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 239 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 240 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 241 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 242 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 243 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 244 245 #elif _CODE_PAGE == 862 /* Hebrew */ 246 #define _DF1S 0 247 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 248 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 249 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 250 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 251 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 252 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 253 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 254 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 255 256 #elif _CODE_PAGE == 863 /* Canadian-French */ 257 #define _DF1S 0 258 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \ 259 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \ 260 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 261 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 262 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 263 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 264 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 265 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 266 267 #elif _CODE_PAGE == 864 /* Arabic */ 268 #define _DF1S 0 269 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 270 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 271 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 272 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 273 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 274 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 275 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 276 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 277 278 #elif _CODE_PAGE == 865 /* Nordic */ 279 #define _DF1S 0 280 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 281 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 282 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 283 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 284 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 285 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 286 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 287 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 288 289 #elif _CODE_PAGE == 866 /* Russian */ 290 #define _DF1S 0 291 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 292 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 293 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 294 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 295 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 296 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 297 0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 298 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 299 300 #elif _CODE_PAGE == 869 /* Greek 2 */ 301 #define _DF1S 0 302 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 303 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \ 304 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 305 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 306 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 307 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \ 308 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \ 309 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF} 310 311 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */ 312 #if _USE_LFN 313 #error Cannot use LFN feature without valid code page. 314 #endif 315 #define _DF1S 0 316 317 #else 318 #error Unknown code page 319 320 #endif 321 322 323 /* Character code support macros */ 324 #define IsUpper(c) (((c)>='A')&&((c)<='Z')) 325 #define IsLower(c) (((c)>='a')&&((c)<='z')) 326 #define IsDigit(c) (((c)>='0')&&((c)<='9')) 327 328 #if _DF1S /* Code page is DBCS */ 329 330 #ifdef _DF2S /* Two 1st byte areas */ 331 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) 332 #else /* One 1st byte area */ 333 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) 334 #endif 335 336 #ifdef _DS3S /* Three 2nd byte areas */ 337 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) 338 #else /* Two 2nd byte areas */ 339 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) 340 #endif 341 342 #else /* Code page is SBCS */ 343 344 #define IsDBCS1(c) 0 345 #define IsDBCS2(c) 0 346 347 #endif /* _DF1S */ 348 349 350 /* Name status flags */ 351 #define NSFLAG 11 /* Index of name status byte in fn[] */ 352 #define NS_LOSS 0x01 /* Out of 8.3 format */ 353 #define NS_LFN 0x02 /* Force to create LFN entry */ 354 #define NS_LAST 0x04 /* Last segment */ 355 #define NS_BODY 0x08 /* Lower case flag (body) */ 356 #define NS_EXT 0x10 /* Lower case flag (ext) */ 357 #define NS_DOT 0x20 /* Dot entry */ 358 359 360 /* FAT sub-type boundaries (Differ from specs but correct for real DOS/Windows) */ 361 #define MIN_FAT16 4086U /* Minimum number of clusters of FAT16 */ 362 #define MIN_FAT32 65526U /* Minimum number of clusters of FAT32 */ 363 364 365 /* FatFs refers the members in the FAT structures as byte array instead of 366 / structure members because the structure is not binary compatible between 367 / different platforms */ 368 369 #define BS_jmpBoot 0 /* x86 jump instruction (3) */ 370 #define BS_OEMName 3 /* OEM name (8) */ 371 #define BPB_BytsPerSec 11 /* Sector size [byte] (2) */ 372 #define BPB_SecPerClus 13 /* Cluster size [sector] (1) */ 373 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */ 374 #define BPB_NumFATs 16 /* Number of FAT copies (1) */ 375 #define BPB_RootEntCnt 17 /* Number of root directory entries for FAT12/16 (2) */ 376 #define BPB_TotSec16 19 /* Volume size [sector] (2) */ 377 #define BPB_Media 21 /* Media descriptor (1) */ 378 #define BPB_FATSz16 22 /* FAT size [sector] (2) */ 379 #define BPB_SecPerTrk 24 /* Track size [sector] (2) */ 380 #define BPB_NumHeads 26 /* Number of heads (2) */ 381 #define BPB_HiddSec 28 /* Number of special hidden sectors (4) */ 382 #define BPB_TotSec32 32 /* Volume size [sector] (4) */ 383 #define BS_DrvNum 36 /* Physical drive number (1) */ 384 #define BS_NTres 37 /* Error flag (1) */ 385 #define BS_BootSig 38 /* Extended boot signature (1) */ 386 #define BS_VolID 39 /* Volume serial number (4) */ 387 #define BS_VolLab 43 /* Volume label (8) */ 388 #define BS_FilSysType 54 /* File system type (1) */ 389 #define BPB_FATSz32 36 /* FAT size [sector] (4) */ 390 #define BPB_ExtFlags 40 /* Extended flags (2) */ 391 #define BPB_FSVer 42 /* File system version (2) */ 392 #define BPB_RootClus 44 /* Root directory first cluster (4) */ 393 #define BPB_FSInfo 48 /* Offset of FSINFO sector (2) */ 394 #define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */ 395 #define BS_DrvNum32 64 /* Physical drive number (1) */ 396 #define BS_NTres32 65 /* Error flag (1) */ 397 #define BS_BootSig32 66 /* Extended boot signature (1) */ 398 #define BS_VolID32 67 /* Volume serial number (4) */ 399 #define BS_VolLab32 71 /* Volume label (8) */ 400 #define BS_FilSysType32 82 /* File system type (1) */ 401 #define FSI_LeadSig 0 /* FSI: Leading signature (4) */ 402 #define FSI_StrucSig 484 /* FSI: Structure signature (4) */ 403 #define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */ 404 #define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */ 405 #define MBR_Table 446 /* MBR: Partition table offset (2) */ 406 #define SZ_PTE 16 /* MBR: Size of a partition table entry */ 407 #define BS_55AA 510 /* Signature word (2) */ 408 409 #define DIR_Name 0 /* Short file name (11) */ 410 #define DIR_Attr 11 /* Attribute (1) */ 411 #define DIR_NTres 12 /* Lower case flag (1) */ 412 #define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */ 413 #define DIR_CrtTime 14 /* Created time (2) */ 414 #define DIR_CrtDate 16 /* Created date (2) */ 415 #define DIR_LstAccDate 18 /* Last accessed date (2) */ 416 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */ 417 #define DIR_WrtTime 22 /* Modified time (2) */ 418 #define DIR_WrtDate 24 /* Modified date (2) */ 419 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */ 420 #define DIR_FileSize 28 /* File size (4) */ 421 #define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */ 422 #define LDIR_Attr 11 /* LFN attribute (1) */ 423 #define LDIR_Type 12 /* LFN type (1) */ 424 #define LDIR_Chksum 13 /* Checksum of corresponding SFN entry */ 425 #define LDIR_FstClusLO 26 /* Must be zero (0) */ 426 #define SZ_DIRE 32 /* Size of a directory entry */ 427 #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */ 428 #define DDEM 0xE5 /* Deleted directory entry mark at DIR_Name[0] */ 429 #define RDDEM 0x05 /* Replacement of the character collides with DDEM */ 430 431 432 433 434 /*-------------------------------------------------------------------------- 435 436 Module Private Work Area 437 438 ---------------------------------------------------------------------------*/ 439 440 /* Remark: Uninitialized variables with static duration are guaranteed 441 / zero/null at start-up. If not, either the linker or start-up routine 442 / being used is not compliance with ANSI-C standard. 443 */ 444 445 #if _VOLUMES < 1 || _VOLUMES > 9 446 #error Wrong _VOLUMES setting 447 #endif 448 static FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */ 449 static WORD Fsid; /* File system mount ID */ 450 451 #if _FS_RPATH && _VOLUMES >= 2 452 static BYTE CurrVol; /* Current drive */ 453 #endif 454 455 #if _FS_LOCK 456 static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */ 457 #endif 458 459 #if _USE_LFN == 0 /* Non LFN feature */ 460 #define DEFINE_NAMEBUF BYTE sfn[12] 461 #define INIT_BUF(dobj) (dobj).fn = sfn 462 #define FREE_BUF() 463 #else 464 #if _MAX_LFN < 12 || _MAX_LFN > 255 465 #error Wrong _MAX_LFN setting 466 #endif 467 #if _USE_LFN == 1 /* LFN feature with static working buffer */ 468 static WCHAR LfnBuf[_MAX_LFN + 1]; 469 #define DEFINE_NAMEBUF BYTE sfn[12] 470 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; } 471 #define FREE_BUF() 472 #elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */ 473 #define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN + 1] 474 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; } 475 #define FREE_BUF() 476 #elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */ 477 #define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR *lfn 478 #define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); (dobj).lfn = lfn; (dobj).fn = sfn; } 479 #define FREE_BUF() ff_memfree(lfn) 480 #else 481 #error Wrong _USE_LFN setting 482 #endif 483 #endif 484 485 #ifdef _EXCVT 486 static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for SBCS extended characters */ 487 #endif 488 489 490 491 492 493 494 /*-------------------------------------------------------------------------- 495 496 Module Private Functions 497 498 ---------------------------------------------------------------------------*/ 499 500 501 /*-----------------------------------------------------------------------*/ 502 /* String functions */ 503 /*-----------------------------------------------------------------------*/ 504 505 /* Copy memory to memory */ 506 static 507 void mem_cpy (void* dst, const void* src, UINT cnt) { 508 BYTE *d = (BYTE*)dst; 509 const BYTE *s = (const BYTE*)src; 510 511 #if _WORD_ACCESS == 1 512 while (cnt >= sizeof (int)) { 513 *(int*)d = *(int*)s; 514 d += sizeof (int); s += sizeof (int); 515 cnt -= sizeof (int); 516 } 517 #endif 518 while (cnt--) 519 *d++ = *s++; 520 } 521 522 /* Fill memory */ 523 static 524 void mem_set (void* dst, int val, UINT cnt) { 525 BYTE *d = (BYTE*)dst; 526 527 while (cnt--) 528 *d++ = (BYTE)val; 529 } 530 531 /* Compare memory to memory */ 532 static 533 int mem_cmp (const void* dst, const void* src, UINT cnt) { 534 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; 535 int r = 0; 536 537 while (cnt-- && (r = *d++ - *s++) == 0) ; 538 return r; 539 } 540 541 /* Check if chr is contained in the string */ 542 static 543 int chk_chr (const char* str, int chr) { 544 while (*str && *str != chr) str++; 545 return *str; 546 } 547 548 549 550 551 /*-----------------------------------------------------------------------*/ 552 /* Request/Release grant to access the volume */ 553 /*-----------------------------------------------------------------------*/ 554 #if _FS_REENTRANT 555 static 556 int lock_fs ( 557 FATFS* fs /* File system object */ 558 ) 559 { 560 return ff_req_grant(fs->sobj); 561 } 562 563 564 static 565 void unlock_fs ( 566 FATFS* fs, /* File system object */ 567 FRESULT res /* Result code to be returned */ 568 ) 569 { 570 if (fs && 571 res != FR_NOT_ENABLED && 572 res != FR_INVALID_DRIVE && 573 res != FR_INVALID_OBJECT && 574 res != FR_TIMEOUT) { 575 ff_rel_grant(fs->sobj); 576 } 577 } 578 #endif 579 580 581 582 583 /*-----------------------------------------------------------------------*/ 584 /* File lock control functions */ 585 /*-----------------------------------------------------------------------*/ 586 #if _FS_LOCK 587 588 static 589 FRESULT chk_lock ( /* Check if the file can be accessed */ 590 DIR* dp, /* Directory object pointing the file to be checked */ 591 int acc /* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */ 592 ) 593 { 594 UINT i, be; 595 596 /* Search file semaphore table */ 597 for (i = be = 0; i < _FS_LOCK; i++) { 598 if (Files[i].fs) { /* Existing entry */ 599 if (Files[i].fs == dp->fs && /* Check if the object matched with an open object */ 600 Files[i].clu == dp->sclust && 601 Files[i].idx == dp->index) break; 602 } else { /* Blank entry */ 603 be = 1; 604 } 605 } 606 if (i == _FS_LOCK) /* The object is not opened */ 607 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */ 608 609 /* The object has been opened. Reject any open against writing file and all write mode open */ 610 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK; 611 } 612 613 614 static 615 int enq_lock (void) /* Check if an entry is available for a new object */ 616 { 617 UINT i; 618 619 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; 620 return (i == _FS_LOCK) ? 0 : 1; 621 } 622 623 624 static 625 UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */ 626 DIR* dp, /* Directory object pointing the file to register or increment */ 627 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ 628 ) 629 { 630 UINT i; 631 632 633 for (i = 0; i < _FS_LOCK; i++) { /* Find the object */ 634 if (Files[i].fs == dp->fs && 635 Files[i].clu == dp->sclust && 636 Files[i].idx == dp->index) break; 637 } 638 639 if (i == _FS_LOCK) { /* Not opened. Register it as new. */ 640 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; 641 if (i == _FS_LOCK) return 0; /* No free entry to register (int err) */ 642 Files[i].fs = dp->fs; 643 Files[i].clu = dp->sclust; 644 Files[i].idx = dp->index; 645 Files[i].ctr = 0; 646 } 647 648 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */ 649 650 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */ 651 652 return i + 1; 653 } 654 655 656 static 657 FRESULT dec_lock ( /* Decrement object open counter */ 658 UINT i /* Semaphore index (1..) */ 659 ) 660 { 661 WORD n; 662 FRESULT res; 663 664 665 if (--i < _FS_LOCK) { /* Shift index number origin from 0 */ 666 n = Files[i].ctr; 667 if (n == 0x100) n = 0; /* If write mode open, delete the entry */ 668 if (n) n--; /* Decrement read mode open count */ 669 Files[i].ctr = n; 670 if (!n) Files[i].fs = 0; /* Delete the entry if open count gets zero */ 671 res = FR_OK; 672 } else { 673 res = FR_INT_ERR; /* Invalid index nunber */ 674 } 675 return res; 676 } 677 678 679 static 680 void clear_lock ( /* Clear lock entries of the volume */ 681 FATFS *fs 682 ) 683 { 684 UINT i; 685 686 for (i = 0; i < _FS_LOCK; i++) { 687 if (Files[i].fs == fs) Files[i].fs = 0; 688 } 689 } 690 #endif 691 692 693 694 695 /*-----------------------------------------------------------------------*/ 696 /* Move/Flush disk access window in the file system object */ 697 /*-----------------------------------------------------------------------*/ 698 #if !_FS_READONLY 699 static 700 FRESULT sync_window ( /* FR_OK:succeeded, !=0:error */ 701 FATFS* fs /* File system object */ 702 ) 703 { 704 DWORD wsect; 705 UINT nf; 706 FRESULT res = FR_OK; 707 708 709 if (fs->wflag) { /* Write back the sector if it is dirty */ 710 wsect = fs->winsect; /* Current sector number */ 711 if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) { 712 res = FR_DISK_ERR; 713 } else { 714 fs->wflag = 0; 715 if (wsect - fs->fatbase < fs->fsize) { /* Is it in the FAT area? */ 716 for (nf = fs->n_fats; nf >= 2; nf--) { /* Reflect the change to all FAT copies */ 717 wsect += fs->fsize; 718 disk_write(fs->drv, fs->win, wsect, 1); 719 } 720 } 721 } 722 } 723 return res; 724 } 725 #endif 726 727 728 static 729 FRESULT move_window ( /* FR_OK(0):succeeded, !=0:error */ 730 FATFS* fs, /* File system object */ 731 DWORD sector /* Sector number to make appearance in the fs->win[] */ 732 ) 733 { 734 FRESULT res = FR_OK; 735 736 737 if (sector != fs->winsect) { /* Window offset changed? */ 738 #if !_FS_READONLY 739 res = sync_window(fs); /* Write-back changes */ 740 #endif 741 if (res == FR_OK) { /* Fill sector window with new data */ 742 if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) { 743 sector = 0xFFFFFFFF; /* Invalidate window if data is not reliable */ 744 res = FR_DISK_ERR; 745 } 746 fs->winsect = sector; 747 } 748 } 749 return res; 750 } 751 752 753 754 755 /*-----------------------------------------------------------------------*/ 756 /* Synchronize file system and strage device */ 757 /*-----------------------------------------------------------------------*/ 758 #if !_FS_READONLY 759 static 760 FRESULT sync_fs ( /* FR_OK:succeeded, !=0:error */ 761 FATFS* fs /* File system object */ 762 ) 763 { 764 FRESULT res; 765 766 767 res = sync_window(fs); 768 if (res == FR_OK) { 769 /* Update FSInfo sector if needed */ 770 if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) { 771 /* Create FSInfo structure */ 772 mem_set(fs->win, 0, SS(fs)); 773 ST_WORD(fs->win + BS_55AA, 0xAA55); 774 ST_DWORD(fs->win + FSI_LeadSig, 0x41615252); 775 ST_DWORD(fs->win + FSI_StrucSig, 0x61417272); 776 ST_DWORD(fs->win + FSI_Free_Count, fs->free_clust); 777 ST_DWORD(fs->win + FSI_Nxt_Free, fs->last_clust); 778 /* Write it into the FSInfo sector */ 779 fs->winsect = fs->volbase + 1; 780 disk_write(fs->drv, fs->win, fs->winsect, 1); 781 fs->fsi_flag = 0; 782 } 783 /* Make sure that no pending write process in the physical drive */ 784 if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK) 785 res = FR_DISK_ERR; 786 } 787 788 return res; 789 } 790 #endif 791 792 793 794 795 /*-----------------------------------------------------------------------*/ 796 /* Get sector# from cluster# */ 797 /*-----------------------------------------------------------------------*/ 798 /* Hidden API for hacks and disk tools */ 799 800 DWORD clust2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */ 801 FATFS* fs, /* File system object */ 802 DWORD clst /* Cluster# to be converted */ 803 ) 804 { 805 clst -= 2; 806 if (clst >= fs->n_fatent - 2) return 0; /* Invalid cluster# */ 807 return clst * fs->csize + fs->database; 808 } 809 810 811 812 813 /*-----------------------------------------------------------------------*/ 814 /* FAT access - Read value of a FAT entry */ 815 /*-----------------------------------------------------------------------*/ 816 /* Hidden API for hacks and disk tools */ 817 818 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x0FFFFFFF:Cluster status */ 819 FATFS* fs, /* File system object */ 820 DWORD clst /* FAT index number (cluster number) to get the value */ 821 ) 822 { 823 UINT wc, bc; 824 BYTE *p; 825 DWORD val; 826 827 828 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */ 829 val = 1; /* Internal error */ 830 831 } else { 832 val = 0xFFFFFFFF; /* Default value falls on disk error */ 833 834 switch (fs->fs_type) { 835 case FS_FAT12 : 836 bc = (UINT)clst; bc += bc / 2; 837 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; 838 wc = fs->win[bc++ % SS(fs)]; 839 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; 840 wc |= fs->win[bc % SS(fs)] << 8; 841 val = clst & 1 ? wc >> 4 : (wc & 0xFFF); 842 break; 843 844 case FS_FAT16 : 845 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break; 846 p = &fs->win[clst * 2 % SS(fs)]; 847 val = LD_WORD(p); 848 break; 849 850 case FS_FAT32 : 851 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break; 852 p = &fs->win[clst * 4 % SS(fs)]; 853 val = LD_DWORD(p) & 0x0FFFFFFF; 854 break; 855 856 default: 857 val = 1; /* Internal error */ 858 } 859 } 860 861 return val; 862 } 863 864 865 866 867 /*-----------------------------------------------------------------------*/ 868 /* FAT access - Change value of a FAT entry */ 869 /*-----------------------------------------------------------------------*/ 870 /* Hidden API for hacks and disk tools */ 871 872 #if !_FS_READONLY 873 FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */ 874 FATFS* fs, /* File system object */ 875 DWORD clst, /* FAT index number (cluster number) to be changed */ 876 DWORD val /* New value to be set to the entry */ 877 ) 878 { 879 UINT bc; 880 BYTE *p; 881 FRESULT res; 882 883 884 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */ 885 res = FR_INT_ERR; 886 887 } else { 888 switch (fs->fs_type) { 889 case FS_FAT12 : 890 bc = (UINT)clst; bc += bc / 2; 891 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 892 if (res != FR_OK) break; 893 p = &fs->win[bc++ % SS(fs)]; 894 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; 895 fs->wflag = 1; 896 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 897 if (res != FR_OK) break; 898 p = &fs->win[bc % SS(fs)]; 899 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); 900 fs->wflag = 1; 901 break; 902 903 case FS_FAT16 : 904 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); 905 if (res != FR_OK) break; 906 p = &fs->win[clst * 2 % SS(fs)]; 907 ST_WORD(p, (WORD)val); 908 fs->wflag = 1; 909 break; 910 911 case FS_FAT32 : 912 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); 913 if (res != FR_OK) break; 914 p = &fs->win[clst * 4 % SS(fs)]; 915 val |= LD_DWORD(p) & 0xF0000000; 916 ST_DWORD(p, val); 917 fs->wflag = 1; 918 break; 919 920 default : 921 res = FR_INT_ERR; 922 } 923 } 924 925 return res; 926 } 927 #endif /* !_FS_READONLY */ 928 929 930 931 932 /*-----------------------------------------------------------------------*/ 933 /* FAT handling - Remove a cluster chain */ 934 /*-----------------------------------------------------------------------*/ 935 #if !_FS_READONLY 936 static 937 FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */ 938 FATFS* fs, /* File system object */ 939 DWORD clst /* Cluster# to remove a chain from */ 940 ) 941 { 942 FRESULT res; 943 DWORD nxt; 944 #if _USE_TRIM 945 DWORD scl = clst, ecl = clst, rt[2]; 946 #endif 947 948 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */ 949 res = FR_INT_ERR; 950 951 } else { 952 res = FR_OK; 953 while (clst < fs->n_fatent) { /* Not a last link? */ 954 nxt = get_fat(fs, clst); /* Get cluster status */ 955 if (nxt == 0) break; /* Empty cluster? */ 956 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */ 957 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */ 958 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */ 959 if (res != FR_OK) break; 960 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSINFO */ 961 fs->free_clust++; 962 fs->fsi_flag |= 1; 963 } 964 #if _USE_TRIM 965 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */ 966 ecl = nxt; 967 } else { /* End of contiguous clusters */ 968 rt[0] = clust2sect(fs, scl); /* Start sector */ 969 rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ 970 disk_ioctl(fs->drv, CTRL_TRIM, rt); /* Erase the block */ 971 scl = ecl = nxt; 972 } 973 #endif 974 clst = nxt; /* Next cluster */ 975 } 976 } 977 978 return res; 979 } 980 #endif 981 982 983 984 985 /*-----------------------------------------------------------------------*/ 986 /* FAT handling - Stretch or Create a cluster chain */ 987 /*-----------------------------------------------------------------------*/ 988 #if !_FS_READONLY 989 static 990 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ 991 FATFS* fs, /* File system object */ 992 DWORD clst /* Cluster# to stretch, 0:Create a new chain */ 993 ) 994 { 995 DWORD cs, ncl, scl; 996 FRESULT res; 997 998 999 if (clst == 0) { /* Create a new chain */ 1000 scl = fs->last_clust; /* Get suggested start point */ 1001 if (!scl || scl >= fs->n_fatent) scl = 1; 1002 } 1003 else { /* Stretch the current chain */ 1004 cs = get_fat(fs, clst); /* Check the cluster status */ 1005 if (cs < 2) return 1; /* Invalid value */ 1006 if (cs == 0xFFFFFFFF) return cs; /* A disk error occurred */ 1007 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */ 1008 scl = clst; 1009 } 1010 1011 ncl = scl; /* Start cluster */ 1012 for (;;) { 1013 ncl++; /* Next cluster */ 1014 if (ncl >= fs->n_fatent) { /* Check wrap around */ 1015 ncl = 2; 1016 if (ncl > scl) return 0; /* No free cluster */ 1017 } 1018 cs = get_fat(fs, ncl); /* Get the cluster status */ 1019 if (cs == 0) break; /* Found a free cluster */ 1020 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */ 1021 return cs; 1022 if (ncl == scl) return 0; /* No free cluster */ 1023 } 1024 1025 res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */ 1026 if (res == FR_OK && clst != 0) { 1027 res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */ 1028 } 1029 if (res == FR_OK) { 1030 fs->last_clust = ncl; /* Update FSINFO */ 1031 if (fs->free_clust != 0xFFFFFFFF) { 1032 fs->free_clust--; 1033 fs->fsi_flag |= 1; 1034 } 1035 } else { 1036 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; 1037 } 1038 1039 return ncl; /* Return new cluster number or error code */ 1040 } 1041 #endif /* !_FS_READONLY */ 1042 1043 1044 1045 1046 /*-----------------------------------------------------------------------*/ 1047 /* FAT handling - Convert offset into cluster with link map table */ 1048 /*-----------------------------------------------------------------------*/ 1049 1050 #if _USE_FASTSEEK 1051 static 1052 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ 1053 FIL* fp, /* Pointer to the file object */ 1054 DWORD ofs /* File offset to be converted to cluster# */ 1055 ) 1056 { 1057 DWORD cl, ncl, *tbl; 1058 1059 1060 tbl = fp->cltbl + 1; /* Top of CLMT */ 1061 cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */ 1062 for (;;) { 1063 ncl = *tbl++; /* Number of cluters in the fragment */ 1064 if (!ncl) return 0; /* End of table? (error) */ 1065 if (cl < ncl) break; /* In this fragment? */ 1066 cl -= ncl; tbl++; /* Next fragment */ 1067 } 1068 return cl + *tbl; /* Return the cluster number */ 1069 } 1070 #endif /* _USE_FASTSEEK */ 1071 1072 1073 1074 1075 /*-----------------------------------------------------------------------*/ 1076 /* Directory handling - Set directory index */ 1077 /*-----------------------------------------------------------------------*/ 1078 1079 static 1080 FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */ 1081 DIR* dp, /* Pointer to directory object */ 1082 UINT idx /* Index of directory table */ 1083 ) 1084 { 1085 DWORD clst, sect; 1086 UINT ic; 1087 1088 1089 dp->index = (WORD)idx; /* Current index */ 1090 clst = dp->sclust; /* Table start cluster (0:root) */ 1091 if (clst == 1 || clst >= dp->fs->n_fatent) /* Check start cluster range */ 1092 return FR_INT_ERR; 1093 if (!clst && dp->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ 1094 clst = dp->fs->dirbase; 1095 1096 if (clst == 0) { /* Static table (root-directory in FAT12/16) */ 1097 if (idx >= dp->fs->n_rootdir) /* Is index out of range? */ 1098 return FR_INT_ERR; 1099 sect = dp->fs->dirbase; 1100 } 1101 else { /* Dynamic table (root-directory in FAT32 or sub-directory) */ 1102 ic = SS(dp->fs) / SZ_DIRE * dp->fs->csize; /* Entries per cluster */ 1103 while (idx >= ic) { /* Follow cluster chain */ 1104 clst = get_fat(dp->fs, clst); /* Get next cluster */ 1105 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 1106 if (clst < 2 || clst >= dp->fs->n_fatent) /* Reached to end of table or internal error */ 1107 return FR_INT_ERR; 1108 idx -= ic; 1109 } 1110 sect = clust2sect(dp->fs, clst); 1111 } 1112 dp->clust = clst; /* Current cluster# */ 1113 if (!sect) return FR_INT_ERR; 1114 dp->sect = sect + idx / (SS(dp->fs) / SZ_DIRE); /* Sector# of the directory entry */ 1115 dp->dir = dp->fs->win + (idx % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Ptr to the entry in the sector */ 1116 1117 return FR_OK; 1118 } 1119 1120 1121 1122 1123 /*-----------------------------------------------------------------------*/ 1124 /* Directory handling - Move directory table index next */ 1125 /*-----------------------------------------------------------------------*/ 1126 1127 static 1128 FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */ 1129 DIR* dp, /* Pointer to the directory object */ 1130 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ 1131 ) 1132 { 1133 DWORD clst; 1134 UINT i; 1135 #if !_FS_READONLY 1136 UINT c; 1137 #endif 1138 1139 1140 i = dp->index + 1; 1141 if (!(i & 0xFFFF) || !dp->sect) /* Report EOT when index has reached 65535 */ 1142 return FR_NO_FILE; 1143 1144 if (!(i % (SS(dp->fs) / SZ_DIRE))) { /* Sector changed? */ 1145 dp->sect++; /* Next sector */ 1146 1147 if (!dp->clust) { /* Static table */ 1148 if (i >= dp->fs->n_rootdir) /* Report EOT if it reached end of static table */ 1149 return FR_NO_FILE; 1150 } 1151 else { /* Dynamic table */ 1152 if (((i / (SS(dp->fs) / SZ_DIRE)) & (dp->fs->csize - 1)) == 0) { /* Cluster changed? */ 1153 clst = get_fat(dp->fs, dp->clust); /* Get next cluster */ 1154 if (clst <= 1) return FR_INT_ERR; 1155 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 1156 if (clst >= dp->fs->n_fatent) { /* If it reached end of dynamic table, */ 1157 #if !_FS_READONLY 1158 if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT */ 1159 clst = create_chain(dp->fs, dp->clust); /* Stretch cluster chain */ 1160 if (clst == 0) return FR_DENIED; /* No free cluster */ 1161 if (clst == 1) return FR_INT_ERR; 1162 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 1163 /* Clean-up stretched table */ 1164 if (sync_window(dp->fs)) return FR_DISK_ERR;/* Flush disk access window */ 1165 mem_set(dp->fs->win, 0, SS(dp->fs)); /* Clear window buffer */ 1166 dp->fs->winsect = clust2sect(dp->fs, clst); /* Cluster start sector */ 1167 for (c = 0; c < dp->fs->csize; c++) { /* Fill the new cluster with 0 */ 1168 dp->fs->wflag = 1; 1169 if (sync_window(dp->fs)) return FR_DISK_ERR; 1170 dp->fs->winsect++; 1171 } 1172 dp->fs->winsect -= c; /* Rewind window offset */ 1173 #else 1174 if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT (this is to suppress warning) */ 1175 return FR_NO_FILE; /* Report EOT */ 1176 #endif 1177 } 1178 dp->clust = clst; /* Initialize data for new cluster */ 1179 dp->sect = clust2sect(dp->fs, clst); 1180 } 1181 } 1182 } 1183 1184 dp->index = (WORD)i; /* Current index */ 1185 dp->dir = dp->fs->win + (i % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Current entry in the window */ 1186 1187 return FR_OK; 1188 } 1189 1190 1191 1192 1193 /*-----------------------------------------------------------------------*/ 1194 /* Directory handling - Reserve directory entry */ 1195 /*-----------------------------------------------------------------------*/ 1196 1197 #if !_FS_READONLY 1198 static 1199 FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */ 1200 DIR* dp, /* Pointer to the directory object */ 1201 UINT nent /* Number of contiguous entries to allocate (1-21) */ 1202 ) 1203 { 1204 FRESULT res; 1205 UINT n; 1206 1207 1208 res = dir_sdi(dp, 0); 1209 if (res == FR_OK) { 1210 n = 0; 1211 do { 1212 res = move_window(dp->fs, dp->sect); 1213 if (res != FR_OK) break; 1214 if (dp->dir[0] == DDEM || dp->dir[0] == 0) { /* Is it a free entry? */ 1215 if (++n == nent) break; /* A block of contiguous free entries is found */ 1216 } else { 1217 n = 0; /* Not a blank entry. Restart to search */ 1218 } 1219 res = dir_next(dp, 1); /* Next entry with table stretch enabled */ 1220 } while (res == FR_OK); 1221 } 1222 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */ 1223 return res; 1224 } 1225 #endif 1226 1227 1228 1229 1230 /*-----------------------------------------------------------------------*/ 1231 /* Directory handling - Load/Store start cluster number */ 1232 /*-----------------------------------------------------------------------*/ 1233 1234 static 1235 DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */ 1236 FATFS* fs, /* Pointer to the fs object */ 1237 const BYTE* dir /* Pointer to the SFN entry */ 1238 ) 1239 { 1240 DWORD cl; 1241 1242 cl = LD_WORD(dir + DIR_FstClusLO); 1243 if (fs->fs_type == FS_FAT32) 1244 cl |= (DWORD)LD_WORD(dir + DIR_FstClusHI) << 16; 1245 1246 return cl; 1247 } 1248 1249 1250 #if !_FS_READONLY 1251 static 1252 void st_clust ( 1253 BYTE* dir, /* Pointer to the SFN entry */ 1254 DWORD cl /* Value to be set */ 1255 ) 1256 { 1257 ST_WORD(dir + DIR_FstClusLO, cl); 1258 ST_WORD(dir + DIR_FstClusHI, cl >> 16); 1259 } 1260 #endif 1261 1262 1263 1264 1265 /*-----------------------------------------------------------------------*/ 1266 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */ 1267 /*-----------------------------------------------------------------------*/ 1268 #if _USE_LFN 1269 static 1270 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN characters in the directory entry */ 1271 1272 1273 static 1274 int cmp_lfn ( /* 1:matched, 0:not matched */ 1275 WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */ 1276 BYTE* dir /* Pointer to the directory entry containing the part of LFN */ 1277 ) 1278 { 1279 UINT i, s; 1280 WCHAR wc, uc; 1281 1282 1283 if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */ 1284 1285 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 1286 1287 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ 1288 uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */ 1289 if (wc) { 1290 if (i >= _MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) /* Compare it */ 1291 return 0; /* Not matched */ 1292 wc = uc; 1293 } else { 1294 if (uc != 0xFFFF) return 0; /* Check filler */ 1295 } 1296 } 1297 1298 if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) /* Last segment matched but different length */ 1299 return 0; 1300 1301 return 1; /* The part of LFN matched */ 1302 } 1303 1304 1305 1306 static 1307 int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */ 1308 WCHAR* lfnbuf, /* Pointer to the LFN working buffer */ 1309 BYTE* dir /* Pointer to the LFN entry */ 1310 ) 1311 { 1312 UINT i, s; 1313 WCHAR wc, uc; 1314 1315 1316 if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */ 1317 1318 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 1319 1320 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ 1321 uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */ 1322 if (wc) { 1323 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 1324 lfnbuf[i++] = wc = uc; /* Store it */ 1325 } else { 1326 if (uc != 0xFFFF) return 0; /* Check filler */ 1327 } 1328 } 1329 1330 if (dir[LDIR_Ord] & LLEF) { /* Put terminator if it is the last LFN part */ 1331 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 1332 lfnbuf[i] = 0; 1333 } 1334 1335 return 1; /* The part of LFN is valid */ 1336 } 1337 1338 1339 #if !_FS_READONLY 1340 static 1341 void fit_lfn ( 1342 const WCHAR* lfnbuf, /* Pointer to the LFN working buffer */ 1343 BYTE* dir, /* Pointer to the LFN entry to be processed */ 1344 BYTE ord, /* LFN order (1-20) */ 1345 BYTE sum /* Checksum of the corresponding SFN */ 1346 ) 1347 { 1348 UINT i, s; 1349 WCHAR wc; 1350 1351 1352 dir[LDIR_Chksum] = sum; /* Set checksum */ 1353 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ 1354 dir[LDIR_Type] = 0; 1355 ST_WORD(dir + LDIR_FstClusLO, 0); 1356 1357 i = (ord - 1) * 13; /* Get offset in the LFN working buffer */ 1358 s = wc = 0; 1359 do { 1360 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective character */ 1361 ST_WORD(dir+LfnOfs[s], wc); /* Put it */ 1362 if (!wc) wc = 0xFFFF; /* Padding characters following last character */ 1363 } while (++s < 13); 1364 if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLEF; /* Bottom LFN part is the start of LFN sequence */ 1365 dir[LDIR_Ord] = ord; /* Set the LFN order */ 1366 } 1367 1368 #endif 1369 #endif 1370 1371 1372 1373 1374 /*-----------------------------------------------------------------------*/ 1375 /* Create numbered name */ 1376 /*-----------------------------------------------------------------------*/ 1377 #if _USE_LFN 1378 static 1379 void gen_numname ( 1380 BYTE* dst, /* Pointer to the buffer to store numbered SFN */ 1381 const BYTE* src, /* Pointer to SFN */ 1382 const WCHAR* lfn, /* Pointer to LFN */ 1383 UINT seq /* Sequence number */ 1384 ) 1385 { 1386 BYTE ns[8], c; 1387 UINT i, j; 1388 WCHAR wc; 1389 DWORD sr; 1390 1391 1392 mem_cpy(dst, src, 11); 1393 1394 if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */ 1395 sr = seq; 1396 while (*lfn) { /* Create a CRC */ 1397 wc = *lfn++; 1398 for (i = 0; i < 16; i++) { 1399 sr = (sr << 1) + (wc & 1); 1400 wc >>= 1; 1401 if (sr & 0x10000) sr ^= 0x11021; 1402 } 1403 } 1404 seq = (UINT)sr; 1405 } 1406 1407 /* itoa (hexdecimal) */ 1408 i = 7; 1409 do { 1410 c = (seq % 16) + '0'; 1411 if (c > '9') c += 7; 1412 ns[i--] = c; 1413 seq /= 16; 1414 } while (seq); 1415 ns[i] = '~'; 1416 1417 /* Append the number */ 1418 for (j = 0; j < i && dst[j] != ' '; j++) { 1419 if (IsDBCS1(dst[j])) { 1420 if (j == i - 1) break; 1421 j++; 1422 } 1423 } 1424 do { 1425 dst[j++] = (i < 8) ? ns[i++] : ' '; 1426 } while (j < 8); 1427 } 1428 #endif 1429 1430 1431 1432 1433 /*-----------------------------------------------------------------------*/ 1434 /* Calculate checksum of an SFN entry */ 1435 /*-----------------------------------------------------------------------*/ 1436 #if _USE_LFN 1437 static 1438 BYTE sum_sfn ( 1439 const BYTE* dir /* Pointer to the SFN entry */ 1440 ) 1441 { 1442 BYTE sum = 0; 1443 UINT n = 11; 1444 1445 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n); 1446 return sum; 1447 } 1448 #endif 1449 1450 1451 1452 1453 /*-----------------------------------------------------------------------*/ 1454 /* Directory handling - Find an object in the directory */ 1455 /*-----------------------------------------------------------------------*/ 1456 1457 static 1458 FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */ 1459 DIR* dp /* Pointer to the directory object linked to the file name */ 1460 ) 1461 { 1462 FRESULT res; 1463 BYTE c, *dir; 1464 #if _USE_LFN 1465 BYTE a, ord, sum; 1466 #endif 1467 1468 res = dir_sdi(dp, 0); /* Rewind directory object */ 1469 if (res != FR_OK) return res; 1470 1471 #if _USE_LFN 1472 ord = sum = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */ 1473 #endif 1474 do { 1475 res = move_window(dp->fs, dp->sect); 1476 if (res != FR_OK) break; 1477 dir = dp->dir; /* Ptr to the directory entry of current index */ 1478 c = dir[DIR_Name]; 1479 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 1480 #if _USE_LFN /* LFN configuration */ 1481 a = dir[DIR_Attr] & AM_MASK; 1482 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 1483 ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */ 1484 } else { 1485 if (a == AM_LFN) { /* An LFN entry is found */ 1486 if (dp->lfn) { 1487 if (c & LLEF) { /* Is it start of LFN sequence? */ 1488 sum = dir[LDIR_Chksum]; 1489 c &= ~LLEF; ord = c; /* LFN start order */ 1490 dp->lfn_idx = dp->index; /* Start index of LFN */ 1491 } 1492 /* Check validity of the LFN entry and compare it with given name */ 1493 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF; 1494 } 1495 } else { /* An SFN entry is found */ 1496 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */ 1497 if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dir, dp->fn, 11)) break; /* SFN matched? */ 1498 ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */ 1499 } 1500 } 1501 #else /* Non LFN configuration */ 1502 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dp->fn, 11)) /* Is it a valid entry? */ 1503 break; 1504 #endif 1505 res = dir_next(dp, 0); /* Next entry */ 1506 } while (res == FR_OK); 1507 1508 return res; 1509 } 1510 1511 1512 1513 1514 /*-----------------------------------------------------------------------*/ 1515 /* Read an object from the directory */ 1516 /*-----------------------------------------------------------------------*/ 1517 #if _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 1518 static 1519 FRESULT dir_read ( 1520 DIR* dp, /* Pointer to the directory object */ 1521 int vol /* Filtered by 0:file/directory or 1:volume label */ 1522 ) 1523 { 1524 FRESULT res; 1525 BYTE a, c, *dir; 1526 #if _USE_LFN 1527 BYTE ord = 0xFF, sum = 0xFF; 1528 #endif 1529 1530 res = FR_NO_FILE; 1531 while (dp->sect) { 1532 res = move_window(dp->fs, dp->sect); 1533 if (res != FR_OK) break; 1534 dir = dp->dir; /* Ptr to the directory entry of current index */ 1535 c = dir[DIR_Name]; 1536 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 1537 a = dir[DIR_Attr] & AM_MASK; 1538 #if _USE_LFN /* LFN configuration */ 1539 if (c == DDEM || (!_FS_RPATH && c == '.') || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */ 1540 ord = 0xFF; 1541 } else { 1542 if (a == AM_LFN) { /* An LFN entry is found */ 1543 if (c & LLEF) { /* Is it start of LFN sequence? */ 1544 sum = dir[LDIR_Chksum]; 1545 c &= ~LLEF; ord = c; 1546 dp->lfn_idx = dp->index; 1547 } 1548 /* Check LFN validity and capture it */ 1549 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF; 1550 } else { /* An SFN entry is found */ 1551 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */ 1552 dp->lfn_idx = 0xFFFF; /* It has no LFN. */ 1553 break; 1554 } 1555 } 1556 #else /* Non LFN configuration */ 1557 if (c != DDEM && (_FS_RPATH || c != '.') && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) /* Is it a valid entry? */ 1558 break; 1559 #endif 1560 res = dir_next(dp, 0); /* Next entry */ 1561 if (res != FR_OK) break; 1562 } 1563 1564 if (res != FR_OK) dp->sect = 0; 1565 1566 return res; 1567 } 1568 #endif /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */ 1569 1570 1571 1572 1573 /*-----------------------------------------------------------------------*/ 1574 /* Register an object to the directory */ 1575 /*-----------------------------------------------------------------------*/ 1576 #if !_FS_READONLY 1577 static 1578 FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */ 1579 DIR* dp /* Target directory with object name to be created */ 1580 ) 1581 { 1582 FRESULT res; 1583 #if _USE_LFN /* LFN configuration */ 1584 UINT n, nent; 1585 BYTE sn[12], *fn, sum; 1586 WCHAR *lfn; 1587 1588 1589 fn = dp->fn; lfn = dp->lfn; 1590 mem_cpy(sn, fn, 12); 1591 1592 if (_FS_RPATH && (sn[NSFLAG] & NS_DOT)) /* Cannot create dot entry */ 1593 return FR_INVALID_NAME; 1594 1595 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ 1596 fn[NSFLAG] = 0; dp->lfn = 0; /* Find only SFN */ 1597 for (n = 1; n < 100; n++) { 1598 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */ 1599 res = dir_find(dp); /* Check if the name collides with existing SFN */ 1600 if (res != FR_OK) break; 1601 } 1602 if (n == 100) return FR_DENIED; /* Abort if too many collisions */ 1603 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ 1604 fn[NSFLAG] = sn[NSFLAG]; dp->lfn = lfn; 1605 } 1606 1607 if (sn[NSFLAG] & NS_LFN) { /* When LFN is to be created, allocate entries for an SFN + LFNs. */ 1608 for (n = 0; lfn[n]; n++) ; 1609 nent = (n + 25) / 13; 1610 } else { /* Otherwise allocate an entry for an SFN */ 1611 nent = 1; 1612 } 1613 res = dir_alloc(dp, nent); /* Allocate entries */ 1614 1615 if (res == FR_OK && --nent) { /* Set LFN entry if needed */ 1616 res = dir_sdi(dp, dp->index - nent); 1617 if (res == FR_OK) { 1618 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */ 1619 do { /* Store LFN entries in bottom first */ 1620 res = move_window(dp->fs, dp->sect); 1621 if (res != FR_OK) break; 1622 fit_lfn(dp->lfn, dp->dir, (BYTE)nent, sum); 1623 dp->fs->wflag = 1; 1624 res = dir_next(dp, 0); /* Next entry */ 1625 } while (res == FR_OK && --nent); 1626 } 1627 } 1628 #else /* Non LFN configuration */ 1629 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */ 1630 #endif 1631 1632 if (res == FR_OK) { /* Set SFN entry */ 1633 res = move_window(dp->fs, dp->sect); 1634 if (res == FR_OK) { 1635 mem_set(dp->dir, 0, SZ_DIRE); /* Clean the entry */ 1636 mem_cpy(dp->dir, dp->fn, 11); /* Put SFN */ 1637 #if _USE_LFN 1638 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */ 1639 #endif 1640 dp->fs->wflag = 1; 1641 } 1642 } 1643 1644 return res; 1645 } 1646 #endif /* !_FS_READONLY */ 1647 1648 1649 1650 1651 /*-----------------------------------------------------------------------*/ 1652 /* Remove an object from the directory */ 1653 /*-----------------------------------------------------------------------*/ 1654 #if !_FS_READONLY && !_FS_MINIMIZE 1655 static 1656 FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */ 1657 DIR* dp /* Directory object pointing the entry to be removed */ 1658 ) 1659 { 1660 FRESULT res; 1661 #if _USE_LFN /* LFN configuration */ 1662 UINT i; 1663 1664 i = dp->index; /* SFN index */ 1665 res = dir_sdi(dp, (dp->lfn_idx == 0xFFFF) ? i : dp->lfn_idx); /* Goto the SFN or top of the LFN entries */ 1666 if (res == FR_OK) { 1667 do { 1668 res = move_window(dp->fs, dp->sect); 1669 if (res != FR_OK) break; 1670 mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */ 1671 *dp->dir = DDEM; 1672 dp->fs->wflag = 1; 1673 if (dp->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */ 1674 res = dir_next(dp, 0); /* Next entry */ 1675 } while (res == FR_OK); 1676 if (res == FR_NO_FILE) res = FR_INT_ERR; 1677 } 1678 1679 #else /* Non LFN configuration */ 1680 res = dir_sdi(dp, dp->index); 1681 if (res == FR_OK) { 1682 res = move_window(dp->fs, dp->sect); 1683 if (res == FR_OK) { 1684 mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */ 1685 *dp->dir = DDEM; 1686 dp->fs->wflag = 1; 1687 } 1688 } 1689 #endif 1690 1691 return res; 1692 } 1693 #endif /* !_FS_READONLY */ 1694 1695 1696 1697 1698 /*-----------------------------------------------------------------------*/ 1699 /* Get file information from directory entry */ 1700 /*-----------------------------------------------------------------------*/ 1701 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 1702 static 1703 void get_fileinfo ( /* No return code */ 1704 DIR* dp, /* Pointer to the directory object */ 1705 FILINFO* fno /* Pointer to the file information to be filled */ 1706 ) 1707 { 1708 UINT i; 1709 TCHAR *p, c; 1710 BYTE *dir; 1711 #if _USE_LFN 1712 WCHAR w, *lfn; 1713 #endif 1714 1715 p = fno->fname; 1716 if (dp->sect) { /* Get SFN */ 1717 dir = dp->dir; 1718 i = 0; 1719 while (i < 11) { /* Copy name body and extension */ 1720 c = (TCHAR)dir[i++]; 1721 if (c == ' ') continue; /* Skip padding spaces */ 1722 if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */ 1723 if (i == 9) *p++ = '.'; /* Insert a . if extension is exist */ 1724 #if _USE_LFN 1725 if (IsUpper(c) && (dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY))) 1726 c += 0x20; /* To lower */ 1727 #if _LFN_UNICODE 1728 if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dir[i])) 1729 c = c << 8 | dir[i++]; 1730 c = ff_convert(c, 1); /* OEM -> Unicode */ 1731 if (!c) c = '?'; 1732 #endif 1733 #endif 1734 *p++ = c; 1735 } 1736 fno->fattrib = dir[DIR_Attr]; /* Attribute */ 1737 fno->fsize = LD_DWORD(dir + DIR_FileSize); /* Size */ 1738 fno->fdate = LD_WORD(dir + DIR_WrtDate); /* Date */ 1739 fno->ftime = LD_WORD(dir + DIR_WrtTime); /* Time */ 1740 } 1741 *p = 0; /* Terminate SFN string by a \0 */ 1742 1743 #if _USE_LFN 1744 if (fno->lfname) { 1745 i = 0; p = fno->lfname; 1746 if (dp->sect && fno->lfsize && dp->lfn_idx != 0xFFFF) { /* Get LFN if available */ 1747 lfn = dp->lfn; 1748 while ((w = *lfn++) != 0) { /* Get an LFN character */ 1749 #if !_LFN_UNICODE 1750 w = ff_convert(w, 0); /* Unicode -> OEM */ 1751 if (!w) { i = 0; break; } /* No LFN if it could not be converted */ 1752 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */ 1753 p[i++] = (TCHAR)(w >> 8); 1754 #endif 1755 if (i >= fno->lfsize - 1) { i = 0; break; } /* No LFN if buffer overflow */ 1756 p[i++] = (TCHAR)w; 1757 } 1758 } 1759 p[i] = 0; /* Terminate LFN string by a \0 */ 1760 } 1761 #endif 1762 } 1763 #endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */ 1764 1765 1766 1767 1768 /*-----------------------------------------------------------------------*/ 1769 /* Pattern matching */ 1770 /*-----------------------------------------------------------------------*/ 1771 #if _USE_FIND && _FS_MINIMIZE <= 1 1772 static 1773 WCHAR get_achar ( /* Get a character and advances ptr 1 or 2 */ 1774 const TCHAR** ptr /* Pointer to pointer to the SBCS/DBCS/Unicode string */ 1775 ) 1776 { 1777 WCHAR chr; 1778 1779 #if !_LFN_UNICODE 1780 chr = (BYTE)*(*ptr)++; /* Get a byte */ 1781 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */ 1782 if (IsDBCS1(chr) && IsDBCS2(**ptr)) /* Get DBC 2nd byte if needed */ 1783 chr = chr << 8 | (BYTE)*(*ptr)++; 1784 #ifdef _EXCVT 1785 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */ 1786 #endif 1787 #else 1788 chr = ff_wtoupper(*(*ptr)++); /* Get a word and to upper */ 1789 #endif 1790 return chr; 1791 } 1792 1793 1794 static 1795 int pattern_matching ( /* 0:mismatched, 1:matched */ 1796 const TCHAR* pat, /* Matching pattern */ 1797 const TCHAR* nam, /* String to be tested */ 1798 int skip, /* Number of pre-skip chars (number of ?s) */ 1799 int inf /* Infinite search (* specified) */ 1800 ) 1801 { 1802 const TCHAR *pp, *np; 1803 WCHAR pc, nc; 1804 int nm, nx; 1805 1806 1807 while (skip--) { /* Pre-skip name chars */ 1808 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */ 1809 } 1810 if (!*pat && inf) return 1; /* (short circuit) */ 1811 1812 do { 1813 pp = pat; np = nam; /* Top of pattern and name to match */ 1814 for (;;) { 1815 if (*pp == '?' || *pp == '*') { /* Wildcard? */ 1816 nm = nx = 0; 1817 do { /* Analyze the wildcard chars */ 1818 if (*pp++ == '?') nm++; else nx = 1; 1819 } while (*pp == '?' || *pp == '*'); 1820 if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */ 1821 nc = *np; break; /* Branch mismatched */ 1822 } 1823 pc = get_achar(&pp); /* Get a pattern char */ 1824 nc = get_achar(&np); /* Get a name char */ 1825 if (pc != nc) break; /* Branch mismatched? */ 1826 if (!pc) return 1; /* Branch matched? (matched at end of both strings) */ 1827 } 1828 get_achar(&nam); /* nam++ */ 1829 } while (inf && nc); /* Retry until end of name if infinite search is specified */ 1830 1831 return 0; 1832 } 1833 #endif /* _USE_FIND && _FS_MINIMIZE <= 1 */ 1834 1835 1836 1837 1838 /*-----------------------------------------------------------------------*/ 1839 /* Pick a top segment and create the object name in directory form */ 1840 /*-----------------------------------------------------------------------*/ 1841 1842 static 1843 FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */ 1844 DIR* dp, /* Pointer to the directory object */ 1845 const TCHAR** path /* Pointer to pointer to the segment in the path string */ 1846 ) 1847 { 1848 #if _USE_LFN /* LFN configuration */ 1849 BYTE b, cf; 1850 WCHAR w, *lfn; 1851 UINT i, ni, si, di; 1852 const TCHAR *p; 1853 1854 /* Create LFN in Unicode */ 1855 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ 1856 lfn = dp->lfn; 1857 si = di = 0; 1858 for (;;) { 1859 w = p[si++]; /* Get a character */ 1860 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */ 1861 if (di >= _MAX_LFN) /* Reject too long name */ 1862 return FR_INVALID_NAME; 1863 #if !_LFN_UNICODE 1864 w &= 0xFF; 1865 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ 1866 b = (BYTE)p[si++]; /* Get 2nd byte */ 1867 w = (w << 8) + b; /* Create a DBC */ 1868 if (!IsDBCS2(b)) 1869 return FR_INVALID_NAME; /* Reject invalid sequence */ 1870 } 1871 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */ 1872 if (!w) return FR_INVALID_NAME; /* Reject invalid code */ 1873 #endif 1874 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal characters for LFN */ 1875 return FR_INVALID_NAME; 1876 lfn[di++] = w; /* Store the Unicode character */ 1877 } 1878 *path = &p[si]; /* Return pointer to the next segment */ 1879 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 1880 #if _FS_RPATH 1881 if ((di == 1 && lfn[di - 1] == '.') || 1882 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot entry? */ 1883 lfn[di] = 0; 1884 for (i = 0; i < 11; i++) /* Create dot name for SFN entry */ 1885 dp->fn[i] = (i < di) ? '.' : ' '; 1886 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */ 1887 return FR_OK; 1888 } 1889 #endif 1890 while (di) { /* Snip off trailing spaces and dots if exist */ 1891 w = lfn[di - 1]; 1892 if (w != ' ' && w != '.') break; 1893 di--; 1894 } 1895 if (!di) return FR_INVALID_NAME; /* Reject nul string */ 1896 lfn[di] = 0; /* LFN is created */ 1897 1898 /* Create SFN in directory form */ 1899 mem_set(dp->fn, ' ', 11); 1900 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */ 1901 if (si) cf |= NS_LOSS | NS_LFN; 1902 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */ 1903 1904 b = i = 0; ni = 8; 1905 for (;;) { 1906 w = lfn[si++]; /* Get an LFN character */ 1907 if (!w) break; /* Break on end of the LFN */ 1908 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */ 1909 cf |= NS_LOSS | NS_LFN; continue; 1910 } 1911 1912 if (i >= ni || si == di) { /* Extension or end of SFN */ 1913 if (ni == 11) { /* Long extension */ 1914 cf |= NS_LOSS | NS_LFN; break; 1915 } 1916 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */ 1917 if (si > di) break; /* No extension */ 1918 si = di; i = 8; ni = 11; /* Enter extension section */ 1919 b <<= 2; continue; 1920 } 1921 1922 if (w >= 0x80) { /* Non ASCII character */ 1923 #ifdef _EXCVT 1924 w = ff_convert(w, 0); /* Unicode -> OEM code */ 1925 if (w) w = ExCvt[w - 0x80]; /* Convert extended character to upper (SBCS) */ 1926 #else 1927 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */ 1928 #endif 1929 cf |= NS_LFN; /* Force create LFN entry */ 1930 } 1931 1932 if (_DF1S && w >= 0x100) { /* Is this DBC? (always false at SBCS cfg) */ 1933 if (i >= ni - 1) { 1934 cf |= NS_LOSS | NS_LFN; i = ni; continue; 1935 } 1936 dp->fn[i++] = (BYTE)(w >> 8); 1937 } else { /* SBC */ 1938 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */ 1939 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ 1940 } else { 1941 if (IsUpper(w)) { /* ASCII large capital */ 1942 b |= 2; 1943 } else { 1944 if (IsLower(w)) { /* ASCII small capital */ 1945 b |= 1; w -= 0x20; 1946 } 1947 } 1948 } 1949 } 1950 dp->fn[i++] = (BYTE)w; 1951 } 1952 1953 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */ 1954 1955 if (ni == 8) b <<= 2; 1956 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */ 1957 cf |= NS_LFN; 1958 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */ 1959 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */ 1960 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */ 1961 } 1962 1963 dp->fn[NSFLAG] = cf; /* SFN is created */ 1964 1965 return FR_OK; 1966 1967 1968 #else /* Non-LFN configuration */ 1969 BYTE b, c, d, *sfn; 1970 UINT ni, si, i; 1971 const char *p; 1972 1973 /* Create file name in directory form */ 1974 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Skip duplicated separator */ 1975 sfn = dp->fn; 1976 mem_set(sfn, ' ', 11); 1977 si = i = b = 0; ni = 8; 1978 #if _FS_RPATH 1979 if (p[si] == '.') { /* Is this a dot entry? */ 1980 for (;;) { 1981 c = (BYTE)p[si++]; 1982 if (c != '.' || si >= 3) break; 1983 sfn[i++] = c; 1984 } 1985 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; 1986 *path = &p[si]; /* Return pointer to the next segment */ 1987 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */ 1988 return FR_OK; 1989 } 1990 #endif 1991 for (;;) { 1992 c = (BYTE)p[si++]; 1993 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */ 1994 if (c == '.' || i >= ni) { 1995 if (ni != 8 || c != '.') return FR_INVALID_NAME; 1996 i = 8; ni = 11; 1997 b <<= 2; continue; 1998 } 1999 if (c >= 0x80) { /* Extended character? */ 2000 b |= 3; /* Eliminate NT flag */ 2001 #ifdef _EXCVT 2002 c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */ 2003 #else 2004 #if !_DF1S 2005 return FR_INVALID_NAME; /* Reject extended characters (ASCII cfg) */ 2006 #endif 2007 #endif 2008 } 2009 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false at SBCS cfg.) */ 2010 d = (BYTE)p[si++]; /* Get 2nd byte */ 2011 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */ 2012 return FR_INVALID_NAME; 2013 sfn[i++] = c; 2014 sfn[i++] = d; 2015 } else { /* SBC */ 2016 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */ 2017 return FR_INVALID_NAME; 2018 if (IsUpper(c)) { /* ASCII large capital? */ 2019 b |= 2; 2020 } else { 2021 if (IsLower(c)) { /* ASCII small capital? */ 2022 b |= 1; c -= 0x20; 2023 } 2024 } 2025 sfn[i++] = c; 2026 } 2027 } 2028 *path = &p[si]; /* Return pointer to the next segment */ 2029 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 2030 2031 if (!i) return FR_INVALID_NAME; /* Reject nul string */ 2032 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* When first character collides with DDEM, replace it with RDDEM */ 2033 2034 if (ni == 8) b <<= 2; 2035 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */ 2036 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */ 2037 2038 sfn[NSFLAG] = c; /* Store NT flag, File name is created */ 2039 2040 return FR_OK; 2041 #endif 2042 } 2043 2044 2045 2046 2047 /*-----------------------------------------------------------------------*/ 2048 /* Follow a file path */ 2049 /*-----------------------------------------------------------------------*/ 2050 2051 static 2052 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ 2053 DIR* dp, /* Directory object to return last directory and found object */ 2054 const TCHAR* path /* Full-path string to find a file or directory */ 2055 ) 2056 { 2057 FRESULT res; 2058 BYTE *dir, ns; 2059 2060 2061 #if _FS_RPATH 2062 if (*path == '/' || *path == '\\') { /* There is a heading separator */ 2063 path++; dp->sclust = 0; /* Strip it and start from the root directory */ 2064 } else { /* No heading separator */ 2065 dp->sclust = dp->fs->cdir; /* Start from the current directory */ 2066 } 2067 #else 2068 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */ 2069 path++; 2070 dp->sclust = 0; /* Always start from the root directory */ 2071 #endif 2072 2073 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */ 2074 res = dir_sdi(dp, 0); 2075 dp->dir = 0; 2076 } else { /* Follow path */ 2077 for (;;) { 2078 res = create_name(dp, &path); /* Get a segment name of the path */ 2079 if (res != FR_OK) break; 2080 res = dir_find(dp); /* Find an object with the sagment name */ 2081 ns = dp->fn[NSFLAG]; 2082 if (res != FR_OK) { /* Failed to find the object */ 2083 if (res == FR_NO_FILE) { /* Object is not found */ 2084 if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, */ 2085 dp->sclust = 0; dp->dir = 0; /* it is the root directory and stay there */ 2086 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */ 2087 res = FR_OK; /* Ended at the root directroy. Function completed. */ 2088 } else { /* Could not find the object */ 2089 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */ 2090 } 2091 } 2092 break; 2093 } 2094 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */ 2095 dir = dp->dir; /* Follow the sub-directory */ 2096 if (!(dir[DIR_Attr] & AM_DIR)) { /* It is not a sub-directory and cannot follow */ 2097 res = FR_NO_PATH; break; 2098 } 2099 dp->sclust = ld_clust(dp->fs, dir); 2100 } 2101 } 2102 2103 return res; 2104 } 2105 2106 2107 2108 2109 /*-----------------------------------------------------------------------*/ 2110 /* Get logical drive number from path name */ 2111 /*-----------------------------------------------------------------------*/ 2112 2113 static 2114 int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */ 2115 const TCHAR** path /* Pointer to pointer to the path name */ 2116 ) 2117 { 2118 const TCHAR *tp, *tt; 2119 UINT i; 2120 int vol = -1; 2121 #if _STR_VOLUME_ID /* Find string drive id */ 2122 static const char* const str[] = {_VOLUME_STRS}; 2123 const char *sp; 2124 char c; 2125 TCHAR tc; 2126 #endif 2127 2128 2129 if (*path) { /* If the pointer is not a null */ 2130 for (tt = *path; (UINT)*tt >= (_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find ':' in the path */ 2131 if (*tt == ':') { /* If a ':' is exist in the path name */ 2132 tp = *path; 2133 i = *tp++ - '0'; 2134 if (i < 10 && tp == tt) { /* Is there a numeric drive id? */ 2135 if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */ 2136 vol = (int)i; 2137 *path = ++tt; 2138 } 2139 } 2140 #if _STR_VOLUME_ID 2141 else { /* No numeric drive number, find string drive id */ 2142 i = 0; tt++; 2143 do { 2144 sp = str[i]; tp = *path; 2145 do { /* Compare a string drive id with path name */ 2146 c = *sp++; tc = *tp++; 2147 if (IsLower(tc)) tc -= 0x20; 2148 } while (c && (TCHAR)c == tc); 2149 } while ((c || tp != tt) && ++i < _VOLUMES); /* Repeat for each id until pattern match */ 2150 if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */ 2151 vol = (int)i; 2152 *path = tt; 2153 } 2154 } 2155 #endif 2156 return vol; 2157 } 2158 #if _FS_RPATH && _VOLUMES >= 2 2159 vol = CurrVol; /* Current drive */ 2160 #else 2161 vol = 0; /* Drive 0 */ 2162 #endif 2163 } 2164 return vol; 2165 } 2166 2167 2168 2169 2170 /*-----------------------------------------------------------------------*/ 2171 /* Load a sector and check if it is an FAT boot sector */ 2172 /*-----------------------------------------------------------------------*/ 2173 2174 static 2175 BYTE check_fs ( /* 0:Valid FAT-BS, 1:Valid BS but not FAT, 2:Not a BS, 3:Disk error */ 2176 FATFS* fs, /* File system object */ 2177 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ 2178 ) 2179 { 2180 fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */ 2181 if (move_window(fs, sect) != FR_OK) /* Load boot record */ 2182 return 3; 2183 2184 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */ 2185 return 2; 2186 2187 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ 2188 return 0; 2189 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ 2190 return 0; 2191 2192 return 1; 2193 } 2194 2195 2196 2197 2198 /*-----------------------------------------------------------------------*/ 2199 /* Find logical drive and check if the volume is mounted */ 2200 /*-----------------------------------------------------------------------*/ 2201 2202 static 2203 FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */ 2204 FATFS** rfs, /* Pointer to pointer to the found file system object */ 2205 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */ 2206 BYTE wmode /* !=0: Check write protection for write access */ 2207 ) 2208 { 2209 BYTE fmt, *pt; 2210 int vol; 2211 DSTATUS stat; 2212 DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4]; 2213 WORD nrsv; 2214 FATFS *fs; 2215 UINT i; 2216 2217 2218 /* Get logical drive number from the path name */ 2219 *rfs = 0; 2220 vol = get_ldnumber(path); 2221 if (vol < 0) return FR_INVALID_DRIVE; 2222 2223 /* Check if the file system object is valid or not */ 2224 fs = FatFs[vol]; /* Get pointer to the file system object */ 2225 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */ 2226 2227 ENTER_FF(fs); /* Lock the volume */ 2228 *rfs = fs; /* Return pointer to the file system object */ 2229 2230 if (fs->fs_type) { /* If the volume has been mounted */ 2231 stat = disk_status(fs->drv); 2232 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */ 2233 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */ 2234 return FR_WRITE_PROTECTED; 2235 return FR_OK; /* The file system object is valid */ 2236 } 2237 } 2238 2239 /* The file system object is not valid. */ 2240 /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */ 2241 2242 fs->fs_type = 0; /* Clear the file system object */ 2243 fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */ 2244 stat = disk_initialize(fs->drv); /* Initialize the physical drive */ 2245 if (stat & STA_NOINIT) /* Check if the initialization succeeded */ 2246 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */ 2247 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */ 2248 return FR_WRITE_PROTECTED; 2249 #if _MAX_SS != _MIN_SS /* Get sector size (multiple sector size cfg only) */ 2250 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK 2251 || SS(fs) < _MIN_SS || SS(fs) > _MAX_SS) return FR_DISK_ERR; 2252 #endif 2253 /* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */ 2254 bsect = 0; 2255 fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT boot sector as SFD */ 2256 if (fmt == 1 || (!fmt && (LD2PT(vol)))) { /* Not an FAT boot sector or forced partition number */ 2257 for (i = 0; i < 4; i++) { /* Get partition offset */ 2258 pt = fs->win + MBR_Table + i * SZ_PTE; 2259 br[i] = pt[4] ? LD_DWORD(&pt[8]) : 0; 2260 } 2261 i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */ 2262 if (i) i--; 2263 do { /* Find an FAT volume */ 2264 bsect = br[i]; 2265 fmt = bsect ? check_fs(fs, bsect) : 2; /* Check the partition */ 2266 } while (!LD2PT(vol) && fmt && ++i < 4); 2267 } 2268 if (fmt == 3) return FR_DISK_ERR; /* An error occured in the disk I/O layer */ 2269 if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */ 2270 2271 /* An FAT volume is found. Following code initializes the file system object */ 2272 2273 if (LD_WORD(fs->win + BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */ 2274 return FR_NO_FILESYSTEM; 2275 2276 fasize = LD_WORD(fs->win + BPB_FATSz16); /* Number of sectors per FAT */ 2277 if (!fasize) fasize = LD_DWORD(fs->win + BPB_FATSz32); 2278 fs->fsize = fasize; 2279 2280 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */ 2281 if (fs->n_fats != 1 && fs->n_fats != 2) /* (Must be 1 or 2) */ 2282 return FR_NO_FILESYSTEM; 2283 fasize *= fs->n_fats; /* Number of sectors for FAT area */ 2284 2285 fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */ 2286 if (!fs->csize || (fs->csize & (fs->csize - 1))) /* (Must be power of 2) */ 2287 return FR_NO_FILESYSTEM; 2288 2289 fs->n_rootdir = LD_WORD(fs->win + BPB_RootEntCnt); /* Number of root directory entries */ 2290 if (fs->n_rootdir % (SS(fs) / SZ_DIRE)) /* (Must be sector aligned) */ 2291 return FR_NO_FILESYSTEM; 2292 2293 tsect = LD_WORD(fs->win + BPB_TotSec16); /* Number of sectors on the volume */ 2294 if (!tsect) tsect = LD_DWORD(fs->win + BPB_TotSec32); 2295 2296 nrsv = LD_WORD(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */ 2297 if (!nrsv) return FR_NO_FILESYSTEM; /* (Must not be 0) */ 2298 2299 /* Determine the FAT sub type */ 2300 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIRE); /* RSV + FAT + DIR */ 2301 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 2302 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ 2303 if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 2304 fmt = FS_FAT12; 2305 if (nclst >= MIN_FAT16) fmt = FS_FAT16; 2306 if (nclst >= MIN_FAT32) fmt = FS_FAT32; 2307 2308 /* Boundaries and Limits */ 2309 fs->n_fatent = nclst + 2; /* Number of FAT entries */ 2310 fs->volbase = bsect; /* Volume start sector */ 2311 fs->fatbase = bsect + nrsv; /* FAT start sector */ 2312 fs->database = bsect + sysect; /* Data start sector */ 2313 if (fmt == FS_FAT32) { 2314 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ 2315 fs->dirbase = LD_DWORD(fs->win + BPB_RootClus); /* Root directory start cluster */ 2316 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */ 2317 } else { 2318 if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */ 2319 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ 2320 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */ 2321 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); 2322 } 2323 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than the size needed) */ 2324 return FR_NO_FILESYSTEM; 2325 2326 #if !_FS_READONLY 2327 /* Initialize cluster allocation information */ 2328 fs->last_clust = fs->free_clust = 0xFFFFFFFF; 2329 2330 /* Get fsinfo if available */ 2331 fs->fsi_flag = 0x80; 2332 #if (_FS_NOFSINFO & 3) != 3 2333 if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo == 1 */ 2334 && LD_WORD(fs->win + BPB_FSInfo) == 1 2335 && move_window(fs, bsect + 1) == FR_OK) 2336 { 2337 fs->fsi_flag = 0; 2338 if (LD_WORD(fs->win + BS_55AA) == 0xAA55 /* Load FSINFO data if available */ 2339 && LD_DWORD(fs->win + FSI_LeadSig) == 0x41615252 2340 && LD_DWORD(fs->win + FSI_StrucSig) == 0x61417272) 2341 { 2342 #if (_FS_NOFSINFO & 1) == 0 2343 fs->free_clust = LD_DWORD(fs->win + FSI_Free_Count); 2344 #endif 2345 #if (_FS_NOFSINFO & 2) == 0 2346 fs->last_clust = LD_DWORD(fs->win + FSI_Nxt_Free); 2347 #endif 2348 } 2349 } 2350 #endif 2351 #endif 2352 fs->fs_type = fmt; /* FAT sub-type */ 2353 fs->id = ++Fsid; /* File system mount ID */ 2354 #if _FS_RPATH 2355 fs->cdir = 0; /* Set current directory to root */ 2356 #endif 2357 #if _FS_LOCK /* Clear file lock semaphores */ 2358 clear_lock(fs); 2359 #endif 2360 2361 return FR_OK; 2362 } 2363 2364 2365 2366 2367 /*-----------------------------------------------------------------------*/ 2368 /* Check if the file/directory object is valid or not */ 2369 /*-----------------------------------------------------------------------*/ 2370 2371 static 2372 FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */ 2373 void* obj /* Pointer to the object FIL/DIR to check validity */ 2374 ) 2375 { 2376 FIL *fil = (FIL*)obj; /* Assuming offset of .fs and .id in the FIL/DIR structure is identical */ 2377 2378 2379 if (!fil || !fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id || (disk_status(fil->fs->drv) & STA_NOINIT)) 2380 return FR_INVALID_OBJECT; 2381 2382 ENTER_FF(fil->fs); /* Lock file system */ 2383 2384 return FR_OK; 2385 } 2386 2387 2388 2389 2390 /*-------------------------------------------------------------------------- 2391 2392 Public Functions 2393 2394 ---------------------------------------------------------------------------*/ 2395 2396 2397 2398 /*-----------------------------------------------------------------------*/ 2399 /* Mount/Unmount a Logical Drive */ 2400 /*-----------------------------------------------------------------------*/ 2401 2402 FRESULT f_mount ( 2403 FATFS* fs, /* Pointer to the file system object (NULL:unmount)*/ 2404 const TCHAR* path, /* Logical drive number to be mounted/unmounted */ 2405 BYTE opt /* 0:Do not mount (delayed mount), 1:Mount immediately */ 2406 ) 2407 { 2408 FATFS *cfs; 2409 int vol; 2410 FRESULT res; 2411 const TCHAR *rp = path; 2412 2413 2414 vol = get_ldnumber(&rp); 2415 if (vol < 0) return FR_INVALID_DRIVE; 2416 cfs = FatFs[vol]; /* Pointer to fs object */ 2417 2418 if (cfs) { 2419 #if _FS_LOCK 2420 clear_lock(cfs); 2421 #endif 2422 #if _FS_REENTRANT /* Discard sync object of the current volume */ 2423 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR; 2424 #endif 2425 cfs->fs_type = 0; /* Clear old fs object */ 2426 } 2427 2428 if (fs) { 2429 fs->fs_type = 0; /* Clear new fs object */ 2430 #if _FS_REENTRANT /* Create sync object for the new volume */ 2431 if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR; 2432 #endif 2433 } 2434 FatFs[vol] = fs; /* Register new fs object */ 2435 2436 if (!fs || opt != 1) return FR_OK; /* Do not mount now, it will be mounted later */ 2437 2438 res = find_volume(&fs, &path, 0); /* Force mounted the volume */ 2439 LEAVE_FF(fs, res); 2440 } 2441 2442 2443 2444 2445 /*-----------------------------------------------------------------------*/ 2446 /* Open or Create a File */ 2447 /*-----------------------------------------------------------------------*/ 2448 2449 FRESULT f_open ( 2450 FIL* fp, /* Pointer to the blank file object */ 2451 const TCHAR* path, /* Pointer to the file name */ 2452 BYTE mode /* Access mode and file open mode flags */ 2453 ) 2454 { 2455 FRESULT res; 2456 DIR dj; 2457 BYTE *dir; 2458 DEFINE_NAMEBUF; 2459 #if !_FS_READONLY 2460 DWORD dw, cl; 2461 #endif 2462 2463 2464 if (!fp) return FR_INVALID_OBJECT; 2465 fp->fs = 0; /* Clear file object */ 2466 2467 /* Get logical drive number */ 2468 #if !_FS_READONLY 2469 mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW; 2470 res = find_volume(&dj.fs, &path, (BYTE)(mode & ~FA_READ)); 2471 #else 2472 mode &= FA_READ; 2473 res = find_volume(&dj.fs, &path, 0); 2474 #endif 2475 if (res == FR_OK) { 2476 INIT_BUF(dj); 2477 res = follow_path(&dj, path); /* Follow the file path */ 2478 dir = dj.dir; 2479 #if !_FS_READONLY /* R/W configuration */ 2480 if (res == FR_OK) { 2481 if (!dir) /* Default directory itself */ 2482 res = FR_INVALID_NAME; 2483 #if _FS_LOCK 2484 else 2485 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 2486 #endif 2487 } 2488 /* Create or Open a file */ 2489 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { 2490 if (res != FR_OK) { /* No file, create new */ 2491 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */ 2492 #if _FS_LOCK 2493 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; 2494 #else 2495 res = dir_register(&dj); 2496 #endif 2497 mode |= FA_CREATE_ALWAYS; /* File is created */ 2498 dir = dj.dir; /* New entry */ 2499 } 2500 else { /* Any object is already existing */ 2501 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */ 2502 res = FR_DENIED; 2503 } else { 2504 if (mode & FA_CREATE_NEW) /* Cannot create as new file */ 2505 res = FR_EXIST; 2506 } 2507 } 2508 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */ 2509 dw = GET_FATTIME(); 2510 ST_DWORD(dir + DIR_CrtTime, dw);/* Set created time */ 2511 ST_DWORD(dir + DIR_WrtTime, dw);/* Set modified time */ 2512 dir[DIR_Attr] = 0; /* Reset attribute */ 2513 ST_DWORD(dir + DIR_FileSize, 0);/* Reset file size */ 2514 cl = ld_clust(dj.fs, dir); /* Get cluster chain */ 2515 st_clust(dir, 0); /* Reset cluster */ 2516 dj.fs->wflag = 1; 2517 if (cl) { /* Remove the cluster chain if exist */ 2518 dw = dj.fs->winsect; 2519 res = remove_chain(dj.fs, cl); 2520 if (res == FR_OK) { 2521 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */ 2522 res = move_window(dj.fs, dw); 2523 } 2524 } 2525 } 2526 } 2527 else { /* Open an existing file */ 2528 if (res == FR_OK) { /* Following succeeded */ 2529 if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */ 2530 res = FR_NO_FILE; 2531 } else { 2532 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */ 2533 res = FR_DENIED; 2534 } 2535 } 2536 } 2537 if (res == FR_OK) { 2538 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */ 2539 mode |= FA__WRITTEN; 2540 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */ 2541 fp->dir_ptr = dir; 2542 #if _FS_LOCK 2543 fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 2544 if (!fp->lockid) res = FR_INT_ERR; 2545 #endif 2546 } 2547 2548 #else /* R/O configuration */ 2549 if (res == FR_OK) { /* Follow succeeded */ 2550 dir = dj.dir; 2551 if (!dir) { /* Current directory itself */ 2552 res = FR_INVALID_NAME; 2553 } else { 2554 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */ 2555 res = FR_NO_FILE; 2556 } 2557 } 2558 #endif 2559 FREE_BUF(); 2560 2561 if (res == FR_OK) { 2562 fp->flag = mode; /* File access mode */ 2563 fp->err = 0; /* Clear error flag */ 2564 fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */ 2565 fp->fsize = LD_DWORD(dir + DIR_FileSize); /* File size */ 2566 fp->fptr = 0; /* File pointer */ 2567 fp->dsect = 0; 2568 #if _USE_FASTSEEK 2569 fp->cltbl = 0; /* Normal seek mode */ 2570 #endif 2571 fp->fs = dj.fs; /* Validate file object */ 2572 fp->id = fp->fs->id; 2573 } 2574 } 2575 2576 LEAVE_FF(dj.fs, res); 2577 } 2578 2579 2580 2581 2582 /*-----------------------------------------------------------------------*/ 2583 /* Read File */ 2584 /*-----------------------------------------------------------------------*/ 2585 2586 FRESULT f_read ( 2587 FIL* fp, /* Pointer to the file object */ 2588 void* buff, /* Pointer to data buffer */ 2589 UINT btr, /* Number of bytes to read */ 2590 UINT* br /* Pointer to number of bytes read */ 2591 ) 2592 { 2593 FRESULT res; 2594 DWORD clst, sect, remain; 2595 UINT rcnt, cc; 2596 BYTE csect, *rbuff = (BYTE*)buff; 2597 2598 2599 *br = 0; /* Clear read byte counter */ 2600 2601 res = validate(fp); /* Check validity */ 2602 if (res != FR_OK) LEAVE_FF(fp->fs, res); 2603 if (fp->err) /* Check error */ 2604 LEAVE_FF(fp->fs, (FRESULT)fp->err); 2605 if (!(fp->flag & FA_READ)) /* Check access mode */ 2606 LEAVE_FF(fp->fs, FR_DENIED); 2607 remain = fp->fsize - fp->fptr; 2608 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 2609 2610 for ( ; btr; /* Repeat until all data read */ 2611 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { 2612 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 2613 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 2614 if (!csect) { /* On the cluster boundary? */ 2615 if (fp->fptr == 0) { /* On the top of the file? */ 2616 clst = fp->sclust; /* Follow from the origin */ 2617 } else { /* Middle or end of the file */ 2618 #if _USE_FASTSEEK 2619 if (fp->cltbl) 2620 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 2621 else 2622 #endif 2623 clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */ 2624 } 2625 if (clst < 2) ABORT(fp->fs, FR_INT_ERR); 2626 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 2627 fp->clust = clst; /* Update current cluster */ 2628 } 2629 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ 2630 if (!sect) ABORT(fp->fs, FR_INT_ERR); 2631 sect += csect; 2632 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */ 2633 if (cc) { /* Read maximum contiguous sectors directly */ 2634 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 2635 cc = fp->fs->csize - csect; 2636 if (disk_read(fp->fs->drv, rbuff, sect, cc) != RES_OK) 2637 ABORT(fp->fs, FR_DISK_ERR); 2638 #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ 2639 #if _FS_TINY 2640 if (fp->fs->wflag && fp->fs->winsect - sect < cc) 2641 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs)); 2642 #else 2643 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) 2644 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs)); 2645 #endif 2646 #endif 2647 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 2648 continue; 2649 } 2650 #if !_FS_TINY 2651 if (fp->dsect != sect) { /* Load data sector if not in cache */ 2652 #if !_FS_READONLY 2653 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 2654 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 2655 ABORT(fp->fs, FR_DISK_ERR); 2656 fp->flag &= ~FA__DIRTY; 2657 } 2658 #endif 2659 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */ 2660 ABORT(fp->fs, FR_DISK_ERR); 2661 } 2662 #endif 2663 fp->dsect = sect; 2664 } 2665 rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */ 2666 if (rcnt > btr) rcnt = btr; 2667 #if _FS_TINY 2668 if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */ 2669 ABORT(fp->fs, FR_DISK_ERR); 2670 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 2671 #else 2672 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 2673 #endif 2674 } 2675 2676 LEAVE_FF(fp->fs, FR_OK); 2677 } 2678 2679 2680 2681 2682 #if !_FS_READONLY 2683 /*-----------------------------------------------------------------------*/ 2684 /* Write File */ 2685 /*-----------------------------------------------------------------------*/ 2686 2687 FRESULT f_write ( 2688 FIL* fp, /* Pointer to the file object */ 2689 const void *buff, /* Pointer to the data to be written */ 2690 UINT btw, /* Number of bytes to write */ 2691 UINT* bw /* Pointer to number of bytes written */ 2692 ) 2693 { 2694 FRESULT res; 2695 DWORD clst, sect; 2696 UINT wcnt, cc; 2697 const BYTE *wbuff = (const BYTE*)buff; 2698 BYTE csect; 2699 2700 2701 *bw = 0; /* Clear write byte counter */ 2702 2703 res = validate(fp); /* Check validity */ 2704 if (res != FR_OK) LEAVE_FF(fp->fs, res); 2705 if (fp->err) /* Check error */ 2706 LEAVE_FF(fp->fs, (FRESULT)fp->err); 2707 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 2708 LEAVE_FF(fp->fs, FR_DENIED); 2709 if (fp->fptr + btw < fp->fptr) btw = 0; /* File size cannot reach 4GB */ 2710 2711 for ( ; btw; /* Repeat until all data written */ 2712 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) { 2713 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 2714 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 2715 if (!csect) { /* On the cluster boundary? */ 2716 if (fp->fptr == 0) { /* On the top of the file? */ 2717 clst = fp->sclust; /* Follow from the origin */ 2718 if (clst == 0) /* When no cluster is allocated, */ 2719 clst = create_chain(fp->fs, 0); /* Create a new cluster chain */ 2720 } else { /* Middle or end of the file */ 2721 #if _USE_FASTSEEK 2722 if (fp->cltbl) 2723 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 2724 else 2725 #endif 2726 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */ 2727 } 2728 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ 2729 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 2730 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 2731 fp->clust = clst; /* Update current cluster */ 2732 if (fp->sclust == 0) fp->sclust = clst; /* Set start cluster if the first write */ 2733 } 2734 #if _FS_TINY 2735 if (fp->fs->winsect == fp->dsect && sync_window(fp->fs)) /* Write-back sector cache */ 2736 ABORT(fp->fs, FR_DISK_ERR); 2737 #else 2738 if (fp->flag & FA__DIRTY) { /* Write-back sector cache */ 2739 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 2740 ABORT(fp->fs, FR_DISK_ERR); 2741 fp->flag &= ~FA__DIRTY; 2742 } 2743 #endif 2744 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ 2745 if (!sect) ABORT(fp->fs, FR_INT_ERR); 2746 sect += csect; 2747 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */ 2748 if (cc) { /* Write maximum contiguous sectors directly */ 2749 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 2750 cc = fp->fs->csize - csect; 2751 if (disk_write(fp->fs->drv, wbuff, sect, cc) != RES_OK) 2752 ABORT(fp->fs, FR_DISK_ERR); 2753 #if _FS_MINIMIZE <= 2 2754 #if _FS_TINY 2755 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 2756 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs)); 2757 fp->fs->wflag = 0; 2758 } 2759 #else 2760 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 2761 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs)); 2762 fp->flag &= ~FA__DIRTY; 2763 } 2764 #endif 2765 #endif 2766 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 2767 continue; 2768 } 2769 #if _FS_TINY 2770 if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */ 2771 if (sync_window(fp->fs)) ABORT(fp->fs, FR_DISK_ERR); 2772 fp->fs->winsect = sect; 2773 } 2774 #else 2775 if (fp->dsect != sect) { /* Fill sector cache with file data */ 2776 if (fp->fptr < fp->fsize && 2777 disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) 2778 ABORT(fp->fs, FR_DISK_ERR); 2779 } 2780 #endif 2781 fp->dsect = sect; 2782 } 2783 wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */ 2784 if (wcnt > btw) wcnt = btw; 2785 #if _FS_TINY 2786 if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */ 2787 ABORT(fp->fs, FR_DISK_ERR); 2788 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 2789 fp->fs->wflag = 1; 2790 #else 2791 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 2792 fp->flag |= FA__DIRTY; 2793 #endif 2794 } 2795 2796 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */ 2797 fp->flag |= FA__WRITTEN; /* Set file change flag */ 2798 2799 LEAVE_FF(fp->fs, FR_OK); 2800 } 2801 2802 2803 2804 2805 /*-----------------------------------------------------------------------*/ 2806 /* Synchronize the File */ 2807 /*-----------------------------------------------------------------------*/ 2808 2809 FRESULT f_sync ( 2810 FIL* fp /* Pointer to the file object */ 2811 ) 2812 { 2813 FRESULT res; 2814 DWORD tm; 2815 BYTE *dir; 2816 2817 2818 res = validate(fp); /* Check validity of the object */ 2819 if (res == FR_OK) { 2820 if (fp->flag & FA__WRITTEN) { /* Is there any change to the file? */ 2821 #if !_FS_TINY 2822 if (fp->flag & FA__DIRTY) { /* Write-back cached data if needed */ 2823 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 2824 LEAVE_FF(fp->fs, FR_DISK_ERR); 2825 fp->flag &= ~FA__DIRTY; 2826 } 2827 #endif 2828 /* Update the directory entry */ 2829 res = move_window(fp->fs, fp->dir_sect); 2830 if (res == FR_OK) { 2831 dir = fp->dir_ptr; 2832 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ 2833 ST_DWORD(dir + DIR_FileSize, fp->fsize); /* Update file size */ 2834 st_clust(dir, fp->sclust); /* Update start cluster */ 2835 tm = GET_FATTIME(); /* Update modified time */ 2836 ST_DWORD(dir + DIR_WrtTime, tm); 2837 ST_WORD(dir + DIR_LstAccDate, 0); 2838 fp->flag &= ~FA__WRITTEN; 2839 fp->fs->wflag = 1; 2840 res = sync_fs(fp->fs); 2841 } 2842 } 2843 } 2844 2845 LEAVE_FF(fp->fs, res); 2846 } 2847 2848 #endif /* !_FS_READONLY */ 2849 2850 2851 2852 2853 /*-----------------------------------------------------------------------*/ 2854 /* Close File */ 2855 /*-----------------------------------------------------------------------*/ 2856 2857 FRESULT f_close ( 2858 FIL *fp /* Pointer to the file object to be closed */ 2859 ) 2860 { 2861 FRESULT res; 2862 2863 2864 #if !_FS_READONLY 2865 res = f_sync(fp); /* Flush cached data */ 2866 if (res == FR_OK) 2867 #endif 2868 { 2869 res = validate(fp); /* Lock volume */ 2870 if (res == FR_OK) { 2871 #if _FS_REENTRANT 2872 FATFS *fs = fp->fs; 2873 #endif 2874 #if _FS_LOCK 2875 res = dec_lock(fp->lockid); /* Decrement file open counter */ 2876 if (res == FR_OK) 2877 #endif 2878 fp->fs = 0; /* Invalidate file object */ 2879 #if _FS_REENTRANT 2880 unlock_fs(fs, FR_OK); /* Unlock volume */ 2881 #endif 2882 } 2883 } 2884 return res; 2885 } 2886 2887 2888 2889 2890 /*-----------------------------------------------------------------------*/ 2891 /* Change Current Directory or Current Drive, Get Current Directory */ 2892 /*-----------------------------------------------------------------------*/ 2893 2894 #if _FS_RPATH >= 1 2895 #if _VOLUMES >= 2 2896 FRESULT f_chdrive ( 2897 const TCHAR* path /* Drive number */ 2898 ) 2899 { 2900 int vol; 2901 2902 2903 vol = get_ldnumber(&path); 2904 if (vol < 0) return FR_INVALID_DRIVE; 2905 2906 CurrVol = (BYTE)vol; 2907 2908 return FR_OK; 2909 } 2910 #endif 2911 2912 2913 FRESULT f_chdir ( 2914 const TCHAR* path /* Pointer to the directory path */ 2915 ) 2916 { 2917 FRESULT res; 2918 DIR dj; 2919 DEFINE_NAMEBUF; 2920 2921 2922 /* Get logical drive number */ 2923 res = find_volume(&dj.fs, &path, 0); 2924 if (res == FR_OK) { 2925 INIT_BUF(dj); 2926 res = follow_path(&dj, path); /* Follow the path */ 2927 FREE_BUF(); 2928 if (res == FR_OK) { /* Follow completed */ 2929 if (!dj.dir) { 2930 dj.fs->cdir = dj.sclust; /* Start directory itself */ 2931 } else { 2932 if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */ 2933 dj.fs->cdir = ld_clust(dj.fs, dj.dir); 2934 else 2935 res = FR_NO_PATH; /* Reached but a file */ 2936 } 2937 } 2938 if (res == FR_NO_FILE) res = FR_NO_PATH; 2939 } 2940 2941 LEAVE_FF(dj.fs, res); 2942 } 2943 2944 2945 #if _FS_RPATH >= 2 2946 FRESULT f_getcwd ( 2947 TCHAR* buff, /* Pointer to the directory path */ 2948 UINT len /* Size of path */ 2949 ) 2950 { 2951 FRESULT res; 2952 DIR dj; 2953 UINT i, n; 2954 DWORD ccl; 2955 TCHAR *tp; 2956 FILINFO fno; 2957 DEFINE_NAMEBUF; 2958 2959 2960 *buff = 0; 2961 /* Get logical drive number */ 2962 res = find_volume(&dj.fs, (const TCHAR**)&buff, 0); /* Get current volume */ 2963 if (res == FR_OK) { 2964 INIT_BUF(dj); 2965 i = len; /* Bottom of buffer (directory stack base) */ 2966 dj.sclust = dj.fs->cdir; /* Start to follow upper directory from current directory */ 2967 while ((ccl = dj.sclust) != 0) { /* Repeat while current directory is a sub-directory */ 2968 res = dir_sdi(&dj, 1); /* Get parent directory */ 2969 if (res != FR_OK) break; 2970 res = dir_read(&dj, 0); 2971 if (res != FR_OK) break; 2972 dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent directory */ 2973 res = dir_sdi(&dj, 0); 2974 if (res != FR_OK) break; 2975 do { /* Find the entry links to the child directory */ 2976 res = dir_read(&dj, 0); 2977 if (res != FR_OK) break; 2978 if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */ 2979 res = dir_next(&dj, 0); 2980 } while (res == FR_OK); 2981 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ 2982 if (res != FR_OK) break; 2983 #if _USE_LFN 2984 fno.lfname = buff; 2985 fno.lfsize = i; 2986 #endif 2987 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */ 2988 tp = fno.fname; 2989 #if _USE_LFN 2990 if (*buff) tp = buff; 2991 #endif 2992 for (n = 0; tp[n]; n++) ; 2993 if (i < n + 3) { 2994 res = FR_NOT_ENOUGH_CORE; break; 2995 } 2996 while (n) buff[--i] = tp[--n]; 2997 buff[--i] = '/'; 2998 } 2999 tp = buff; 3000 if (res == FR_OK) { 3001 #if _VOLUMES >= 2 3002 *tp++ = '0' + CurrVol; /* Put drive number */ 3003 *tp++ = ':'; 3004 #endif 3005 if (i == len) { /* Root-directory */ 3006 *tp++ = '/'; 3007 } else { /* Sub-directroy */ 3008 do /* Add stacked path str */ 3009 *tp++ = buff[i++]; 3010 while (i < len); 3011 } 3012 } 3013 *tp = 0; 3014 FREE_BUF(); 3015 } 3016 3017 LEAVE_FF(dj.fs, res); 3018 } 3019 #endif /* _FS_RPATH >= 2 */ 3020 #endif /* _FS_RPATH >= 1 */ 3021 3022 3023 3024 #if _FS_MINIMIZE <= 2 3025 /*-----------------------------------------------------------------------*/ 3026 /* Seek File R/W Pointer */ 3027 /*-----------------------------------------------------------------------*/ 3028 3029 FRESULT f_lseek ( 3030 FIL* fp, /* Pointer to the file object */ 3031 DWORD ofs /* File pointer from top of file */ 3032 ) 3033 { 3034 FRESULT res; 3035 DWORD clst, bcs, nsect, ifptr; 3036 #if _USE_FASTSEEK 3037 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl; 3038 #endif 3039 3040 3041 res = validate(fp); /* Check validity of the object */ 3042 if (res != FR_OK) LEAVE_FF(fp->fs, res); 3043 if (fp->err) /* Check error */ 3044 LEAVE_FF(fp->fs, (FRESULT)fp->err); 3045 3046 #if _USE_FASTSEEK 3047 if (fp->cltbl) { /* Fast seek */ 3048 if (ofs == CREATE_LINKMAP) { /* Create CLMT */ 3049 tbl = fp->cltbl; 3050 tlen = *tbl++; ulen = 2; /* Given table size and required table size */ 3051 cl = fp->sclust; /* Top of the chain */ 3052 if (cl) { 3053 do { 3054 /* Get a fragment */ 3055 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */ 3056 do { 3057 pcl = cl; ncl++; 3058 cl = get_fat(fp->fs, cl); 3059 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR); 3060 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 3061 } while (cl == pcl + 1); 3062 if (ulen <= tlen) { /* Store the length and top of the fragment */ 3063 *tbl++ = ncl; *tbl++ = tcl; 3064 } 3065 } while (cl < fp->fs->n_fatent); /* Repeat until end of chain */ 3066 } 3067 *fp->cltbl = ulen; /* Number of items used */ 3068 if (ulen <= tlen) 3069 *tbl = 0; /* Terminate table */ 3070 else 3071 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */ 3072 3073 } else { /* Fast seek */ 3074 if (ofs > fp->fsize) /* Clip offset at the file size */ 3075 ofs = fp->fsize; 3076 fp->fptr = ofs; /* Set file pointer */ 3077 if (ofs) { 3078 fp->clust = clmt_clust(fp, ofs - 1); 3079 dsc = clust2sect(fp->fs, fp->clust); 3080 if (!dsc) ABORT(fp->fs, FR_INT_ERR); 3081 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1); 3082 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */ 3083 #if !_FS_TINY 3084 #if !_FS_READONLY 3085 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 3086 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 3087 ABORT(fp->fs, FR_DISK_ERR); 3088 fp->flag &= ~FA__DIRTY; 3089 } 3090 #endif 3091 if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */ 3092 ABORT(fp->fs, FR_DISK_ERR); 3093 #endif 3094 fp->dsect = dsc; 3095 } 3096 } 3097 } 3098 } else 3099 #endif 3100 3101 /* Normal Seek */ 3102 { 3103 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */ 3104 #if !_FS_READONLY 3105 && !(fp->flag & FA_WRITE) 3106 #endif 3107 ) ofs = fp->fsize; 3108 3109 ifptr = fp->fptr; 3110 fp->fptr = nsect = 0; 3111 if (ofs) { 3112 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */ 3113 if (ifptr > 0 && 3114 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ 3115 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ 3116 ofs -= fp->fptr; 3117 clst = fp->clust; 3118 } else { /* When seek to back cluster, */ 3119 clst = fp->sclust; /* start from the first cluster */ 3120 #if !_FS_READONLY 3121 if (clst == 0) { /* If no cluster chain, create a new chain */ 3122 clst = create_chain(fp->fs, 0); 3123 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 3124 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 3125 fp->sclust = clst; 3126 } 3127 #endif 3128 fp->clust = clst; 3129 } 3130 if (clst != 0) { 3131 while (ofs > bcs) { /* Cluster following loop */ 3132 #if !_FS_READONLY 3133 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ 3134 clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */ 3135 if (clst == 0) { /* When disk gets full, clip file size */ 3136 ofs = bcs; break; 3137 } 3138 } else 3139 #endif 3140 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */ 3141 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 3142 if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR); 3143 fp->clust = clst; 3144 fp->fptr += bcs; 3145 ofs -= bcs; 3146 } 3147 fp->fptr += ofs; 3148 if (ofs % SS(fp->fs)) { 3149 nsect = clust2sect(fp->fs, clst); /* Current sector */ 3150 if (!nsect) ABORT(fp->fs, FR_INT_ERR); 3151 nsect += ofs / SS(fp->fs); 3152 } 3153 } 3154 } 3155 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */ 3156 #if !_FS_TINY 3157 #if !_FS_READONLY 3158 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 3159 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 3160 ABORT(fp->fs, FR_DISK_ERR); 3161 fp->flag &= ~FA__DIRTY; 3162 } 3163 #endif 3164 if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */ 3165 ABORT(fp->fs, FR_DISK_ERR); 3166 #endif 3167 fp->dsect = nsect; 3168 } 3169 #if !_FS_READONLY 3170 if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */ 3171 fp->fsize = fp->fptr; 3172 fp->flag |= FA__WRITTEN; 3173 } 3174 #endif 3175 } 3176 3177 LEAVE_FF(fp->fs, res); 3178 } 3179 3180 3181 3182 #if _FS_MINIMIZE <= 1 3183 /*-----------------------------------------------------------------------*/ 3184 /* Create a Directory Object */ 3185 /*-----------------------------------------------------------------------*/ 3186 3187 FRESULT f_opendir ( 3188 DIR* dp, /* Pointer to directory object to create */ 3189 const TCHAR* path /* Pointer to the directory path */ 3190 ) 3191 { 3192 FRESULT res; 3193 FATFS* fs; 3194 DEFINE_NAMEBUF; 3195 3196 3197 if (!dp) return FR_INVALID_OBJECT; 3198 3199 /* Get logical drive number */ 3200 res = find_volume(&fs, &path, 0); 3201 if (res == FR_OK) { 3202 dp->fs = fs; 3203 INIT_BUF(*dp); 3204 res = follow_path(dp, path); /* Follow the path to the directory */ 3205 FREE_BUF(); 3206 if (res == FR_OK) { /* Follow completed */ 3207 if (dp->dir) { /* It is not the origin directory itself */ 3208 if (dp->dir[DIR_Attr] & AM_DIR) /* The object is a sub directory */ 3209 dp->sclust = ld_clust(fs, dp->dir); 3210 else /* The object is a file */ 3211 res = FR_NO_PATH; 3212 } 3213 if (res == FR_OK) { 3214 dp->id = fs->id; 3215 res = dir_sdi(dp, 0); /* Rewind directory */ 3216 #if _FS_LOCK 3217 if (res == FR_OK) { 3218 if (dp->sclust) { 3219 dp->lockid = inc_lock(dp, 0); /* Lock the sub directory */ 3220 if (!dp->lockid) 3221 res = FR_TOO_MANY_OPEN_FILES; 3222 } else { 3223 dp->lockid = 0; /* Root directory need not to be locked */ 3224 } 3225 } 3226 #endif 3227 } 3228 } 3229 if (res == FR_NO_FILE) res = FR_NO_PATH; 3230 } 3231 if (res != FR_OK) dp->fs = 0; /* Invalidate the directory object if function faild */ 3232 3233 LEAVE_FF(fs, res); 3234 } 3235 3236 3237 3238 3239 /*-----------------------------------------------------------------------*/ 3240 /* Close Directory */ 3241 /*-----------------------------------------------------------------------*/ 3242 3243 FRESULT f_closedir ( 3244 DIR *dp /* Pointer to the directory object to be closed */ 3245 ) 3246 { 3247 FRESULT res; 3248 3249 3250 res = validate(dp); 3251 if (res == FR_OK) { 3252 #if _FS_REENTRANT 3253 FATFS *fs = dp->fs; 3254 #endif 3255 #if _FS_LOCK 3256 if (dp->lockid) /* Decrement sub-directory open counter */ 3257 res = dec_lock(dp->lockid); 3258 if (res == FR_OK) 3259 #endif 3260 dp->fs = 0; /* Invalidate directory object */ 3261 #if _FS_REENTRANT 3262 unlock_fs(fs, FR_OK); /* Unlock volume */ 3263 #endif 3264 } 3265 return res; 3266 } 3267 3268 3269 3270 3271 /*-----------------------------------------------------------------------*/ 3272 /* Read Directory Entries in Sequence */ 3273 /*-----------------------------------------------------------------------*/ 3274 3275 FRESULT f_readdir ( 3276 DIR* dp, /* Pointer to the open directory object */ 3277 FILINFO* fno /* Pointer to file information to return */ 3278 ) 3279 { 3280 FRESULT res; 3281 DEFINE_NAMEBUF; 3282 3283 3284 res = validate(dp); /* Check validity of the object */ 3285 if (res == FR_OK) { 3286 if (!fno) { 3287 res = dir_sdi(dp, 0); /* Rewind the directory object */ 3288 } else { 3289 INIT_BUF(*dp); 3290 res = dir_read(dp, 0); /* Read an item */ 3291 if (res == FR_NO_FILE) { /* Reached end of directory */ 3292 dp->sect = 0; 3293 res = FR_OK; 3294 } 3295 if (res == FR_OK) { /* A valid entry is found */ 3296 get_fileinfo(dp, fno); /* Get the object information */ 3297 res = dir_next(dp, 0); /* Increment index for next */ 3298 if (res == FR_NO_FILE) { 3299 dp->sect = 0; 3300 res = FR_OK; 3301 } 3302 } 3303 FREE_BUF(); 3304 } 3305 } 3306 3307 LEAVE_FF(dp->fs, res); 3308 } 3309 3310 3311 3312 #if _USE_FIND 3313 /*-----------------------------------------------------------------------*/ 3314 /* Find next file */ 3315 /*-----------------------------------------------------------------------*/ 3316 3317 FRESULT f_findnext ( 3318 DIR* dp, /* Pointer to the open directory object */ 3319 FILINFO* fno /* Pointer to the file information structure */ 3320 ) 3321 { 3322 FRESULT res; 3323 3324 3325 for (;;) { 3326 res = f_readdir(dp, fno); /* Get a directory item */ 3327 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */ 3328 #if _USE_LFN 3329 if (fno->lfname && pattern_matching(dp->pat, fno->lfname, 0, 0)) break; /* Test for LFN if exist */ 3330 #endif 3331 if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for SFN */ 3332 } 3333 return res; 3334 3335 } 3336 3337 3338 3339 /*-----------------------------------------------------------------------*/ 3340 /* Find first file */ 3341 /*-----------------------------------------------------------------------*/ 3342 3343 FRESULT f_findfirst ( 3344 DIR* dp, /* Pointer to the blank directory object */ 3345 FILINFO* fno, /* Pointer to the file information structure */ 3346 const TCHAR* path, /* Pointer to the directory to open */ 3347 const TCHAR* pattern /* Pointer to the matching pattern */ 3348 ) 3349 { 3350 FRESULT res; 3351 3352 3353 dp->pat = pattern; /* Save pointer to pattern string */ 3354 res = f_opendir(dp, path); /* Open the target directory */ 3355 if (res == FR_OK) 3356 res = f_findnext(dp, fno); /* Find the first item */ 3357 return res; 3358 } 3359 3360 #endif /* _USE_FIND */ 3361 3362 3363 3364 #if _FS_MINIMIZE == 0 3365 /*-----------------------------------------------------------------------*/ 3366 /* Get File Status */ 3367 /*-----------------------------------------------------------------------*/ 3368 3369 FRESULT f_stat ( 3370 const TCHAR* path, /* Pointer to the file path */ 3371 FILINFO* fno /* Pointer to file information to return */ 3372 ) 3373 { 3374 FRESULT res; 3375 DIR dj; 3376 DEFINE_NAMEBUF; 3377 3378 3379 /* Get logical drive number */ 3380 res = find_volume(&dj.fs, &path, 0); 3381 if (res == FR_OK) { 3382 INIT_BUF(dj); 3383 res = follow_path(&dj, path); /* Follow the file path */ 3384 if (res == FR_OK) { /* Follow completed */ 3385 if (dj.dir) { /* Found an object */ 3386 if (fno) get_fileinfo(&dj, fno); 3387 } else { /* It is root directory */ 3388 res = FR_INVALID_NAME; 3389 } 3390 } 3391 FREE_BUF(); 3392 } 3393 3394 LEAVE_FF(dj.fs, res); 3395 } 3396 3397 3398 3399 #if !_FS_READONLY 3400 /*-----------------------------------------------------------------------*/ 3401 /* Get Number of Free Clusters */ 3402 /*-----------------------------------------------------------------------*/ 3403 3404 FRESULT f_getfree ( 3405 const TCHAR* path, /* Path name of the logical drive number */ 3406 DWORD* nclst, /* Pointer to a variable to return number of free clusters */ 3407 FATFS** fatfs /* Pointer to return pointer to corresponding file system object */ 3408 ) 3409 { 3410 FRESULT res; 3411 FATFS *fs; 3412 DWORD nfree, clst, sect, stat; 3413 UINT i; 3414 BYTE fat, *p; 3415 3416 3417 /* Get logical drive number */ 3418 res = find_volume(fatfs, &path, 0); 3419 fs = *fatfs; 3420 if (res == FR_OK) { 3421 /* If free_clust is valid, return it without full cluster scan */ 3422 if (fs->free_clust <= fs->n_fatent - 2) { 3423 *nclst = fs->free_clust; 3424 } else { 3425 /* Get number of free clusters */ 3426 fat = fs->fs_type; 3427 nfree = 0; 3428 if (fat == FS_FAT12) { /* Sector unalighed entries: Search FAT via regular routine. */ 3429 clst = 2; 3430 do { 3431 stat = get_fat(fs, clst); 3432 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 3433 if (stat == 1) { res = FR_INT_ERR; break; } 3434 if (stat == 0) nfree++; 3435 } while (++clst < fs->n_fatent); 3436 } else { /* Sector alighed entries: Accelerate the FAT search. */ 3437 clst = fs->n_fatent; sect = fs->fatbase; 3438 i = 0; p = 0; 3439 do { 3440 if (!i) { 3441 res = move_window(fs, sect++); 3442 if (res != FR_OK) break; 3443 p = fs->win; 3444 i = SS(fs); 3445 } 3446 if (fat == FS_FAT16) { 3447 if (LD_WORD(p) == 0) nfree++; 3448 p += 2; i -= 2; 3449 } else { 3450 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) nfree++; 3451 p += 4; i -= 4; 3452 } 3453 } while (--clst); 3454 } 3455 fs->free_clust = nfree; /* free_clust is valid */ 3456 fs->fsi_flag |= 1; /* FSInfo is to be updated */ 3457 *nclst = nfree; /* Return the free clusters */ 3458 } 3459 } 3460 LEAVE_FF(fs, res); 3461 } 3462 3463 3464 3465 3466 /*-----------------------------------------------------------------------*/ 3467 /* Truncate File */ 3468 /*-----------------------------------------------------------------------*/ 3469 3470 FRESULT f_truncate ( 3471 FIL* fp /* Pointer to the file object */ 3472 ) 3473 { 3474 FRESULT res; 3475 DWORD ncl; 3476 3477 3478 res = validate(fp); /* Check validity of the object */ 3479 if (res == FR_OK) { 3480 if (fp->err) { /* Check error */ 3481 res = (FRESULT)fp->err; 3482 } else { 3483 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 3484 res = FR_DENIED; 3485 } 3486 } 3487 if (res == FR_OK) { 3488 if (fp->fsize > fp->fptr) { 3489 fp->fsize = fp->fptr; /* Set file size to current R/W point */ 3490 fp->flag |= FA__WRITTEN; 3491 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ 3492 res = remove_chain(fp->fs, fp->sclust); 3493 fp->sclust = 0; 3494 } else { /* When truncate a part of the file, remove remaining clusters */ 3495 ncl = get_fat(fp->fs, fp->clust); 3496 res = FR_OK; 3497 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; 3498 if (ncl == 1) res = FR_INT_ERR; 3499 if (res == FR_OK && ncl < fp->fs->n_fatent) { 3500 res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF); 3501 if (res == FR_OK) res = remove_chain(fp->fs, ncl); 3502 } 3503 } 3504 #if !_FS_TINY 3505 if (res == FR_OK && (fp->flag & FA__DIRTY)) { 3506 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 3507 res = FR_DISK_ERR; 3508 else 3509 fp->flag &= ~FA__DIRTY; 3510 } 3511 #endif 3512 } 3513 if (res != FR_OK) fp->err = (FRESULT)res; 3514 } 3515 3516 LEAVE_FF(fp->fs, res); 3517 } 3518 3519 3520 3521 3522 /*-----------------------------------------------------------------------*/ 3523 /* Delete a File or Directory */ 3524 /*-----------------------------------------------------------------------*/ 3525 3526 FRESULT f_unlink ( 3527 const TCHAR* path /* Pointer to the file or directory path */ 3528 ) 3529 { 3530 FRESULT res; 3531 DIR dj, sdj; 3532 BYTE *dir; 3533 DWORD dclst = 0; 3534 DEFINE_NAMEBUF; 3535 3536 3537 /* Get logical drive number */ 3538 res = find_volume(&dj.fs, &path, 1); 3539 if (res == FR_OK) { 3540 INIT_BUF(dj); 3541 res = follow_path(&dj, path); /* Follow the file path */ 3542 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) 3543 res = FR_INVALID_NAME; /* Cannot remove dot entry */ 3544 #if _FS_LOCK 3545 if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open object */ 3546 #endif 3547 if (res == FR_OK) { /* The object is accessible */ 3548 dir = dj.dir; 3549 if (!dir) { 3550 res = FR_INVALID_NAME; /* Cannot remove the origin directory */ 3551 } else { 3552 if (dir[DIR_Attr] & AM_RDO) 3553 res = FR_DENIED; /* Cannot remove R/O object */ 3554 } 3555 if (res == FR_OK) { 3556 dclst = ld_clust(dj.fs, dir); 3557 if (dclst && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-directory ? */ 3558 #if _FS_RPATH 3559 if (dclst == dj.fs->cdir) { /* Is it the current directory? */ 3560 res = FR_DENIED; 3561 } else 3562 #endif 3563 { 3564 mem_cpy(&sdj, &dj, sizeof (DIR)); /* Open the sub-directory */ 3565 sdj.sclust = dclst; 3566 res = dir_sdi(&sdj, 2); 3567 if (res == FR_OK) { 3568 res = dir_read(&sdj, 0); /* Read an item (excluding dot entries) */ 3569 if (res == FR_OK) res = FR_DENIED; /* Not empty? (cannot remove) */ 3570 if (res == FR_NO_FILE) res = FR_OK; /* Empty? (can remove) */ 3571 } 3572 } 3573 } 3574 } 3575 if (res == FR_OK) { 3576 res = dir_remove(&dj); /* Remove the directory entry */ 3577 if (res == FR_OK && dclst) /* Remove the cluster chain if exist */ 3578 res = remove_chain(dj.fs, dclst); 3579 if (res == FR_OK) res = sync_fs(dj.fs); 3580 } 3581 } 3582 FREE_BUF(); 3583 } 3584 3585 LEAVE_FF(dj.fs, res); 3586 } 3587 3588 3589 3590 3591 /*-----------------------------------------------------------------------*/ 3592 /* Create a Directory */ 3593 /*-----------------------------------------------------------------------*/ 3594 3595 FRESULT f_mkdir ( 3596 const TCHAR* path /* Pointer to the directory path */ 3597 ) 3598 { 3599 FRESULT res; 3600 DIR dj; 3601 BYTE *dir, n; 3602 DWORD dsc, dcl, pcl, tm = GET_FATTIME(); 3603 DEFINE_NAMEBUF; 3604 3605 3606 /* Get logical drive number */ 3607 res = find_volume(&dj.fs, &path, 1); 3608 if (res == FR_OK) { 3609 INIT_BUF(dj); 3610 res = follow_path(&dj, path); /* Follow the file path */ 3611 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */ 3612 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) 3613 res = FR_INVALID_NAME; 3614 if (res == FR_NO_FILE) { /* Can create a new directory */ 3615 dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */ 3616 res = FR_OK; 3617 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */ 3618 if (dcl == 1) res = FR_INT_ERR; 3619 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; 3620 if (res == FR_OK) /* Flush FAT */ 3621 res = sync_window(dj.fs); 3622 if (res == FR_OK) { /* Initialize the new directory table */ 3623 dsc = clust2sect(dj.fs, dcl); 3624 dir = dj.fs->win; 3625 mem_set(dir, 0, SS(dj.fs)); 3626 mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */ 3627 dir[DIR_Name] = '.'; 3628 dir[DIR_Attr] = AM_DIR; 3629 ST_DWORD(dir + DIR_CrtTime, tm); 3630 ST_DWORD(dir + DIR_WrtTime, tm); 3631 st_clust(dir, dcl); 3632 mem_cpy(dir + SZ_DIRE, dir, SZ_DIRE); /* Create ".." entry */ 3633 dir[SZ_DIRE + 1] = '.'; pcl = dj.sclust; 3634 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase) 3635 pcl = 0; 3636 st_clust(dir + SZ_DIRE, pcl); 3637 for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */ 3638 dj.fs->winsect = dsc++; 3639 dj.fs->wflag = 1; 3640 res = sync_window(dj.fs); 3641 if (res != FR_OK) break; 3642 mem_set(dir, 0, SS(dj.fs)); 3643 } 3644 } 3645 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */ 3646 if (res != FR_OK) { 3647 remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */ 3648 } else { 3649 dir = dj.dir; 3650 dir[DIR_Attr] = AM_DIR; /* Attribute */ 3651 ST_DWORD(dir + DIR_CrtTime, tm); /* Created time */ 3652 ST_DWORD(dir + DIR_WrtTime, tm); /* Modified time */ 3653 st_clust(dir, dcl); /* Table start cluster */ 3654 dj.fs->wflag = 1; 3655 res = sync_fs(dj.fs); 3656 } 3657 } 3658 FREE_BUF(); 3659 } 3660 3661 LEAVE_FF(dj.fs, res); 3662 } 3663 3664 3665 3666 3667 /*-----------------------------------------------------------------------*/ 3668 /* Change Attribute */ 3669 /*-----------------------------------------------------------------------*/ 3670 3671 FRESULT f_chmod ( 3672 const TCHAR* path, /* Pointer to the file path */ 3673 BYTE attr, /* Attribute bits */ 3674 BYTE mask /* Attribute mask to change */ 3675 ) 3676 { 3677 FRESULT res; 3678 DIR dj; 3679 BYTE *dir; 3680 DEFINE_NAMEBUF; 3681 3682 3683 res = find_volume(&dj.fs, &path, 1); /* Get logical drive number */ 3684 if (res == FR_OK) { 3685 INIT_BUF(dj); 3686 res = follow_path(&dj, path); /* Follow the file path */ 3687 FREE_BUF(); 3688 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) 3689 res = FR_INVALID_NAME; 3690 if (res == FR_OK) { 3691 dir = dj.dir; 3692 if (!dir) { /* Is it a root directory? */ 3693 res = FR_INVALID_NAME; 3694 } else { /* File or sub directory */ 3695 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ 3696 dir[DIR_Attr] = (attr & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 3697 dj.fs->wflag = 1; 3698 res = sync_fs(dj.fs); 3699 } 3700 } 3701 } 3702 3703 LEAVE_FF(dj.fs, res); 3704 } 3705 3706 3707 3708 3709 /*-----------------------------------------------------------------------*/ 3710 /* Rename File/Directory */ 3711 /*-----------------------------------------------------------------------*/ 3712 3713 FRESULT f_rename ( 3714 const TCHAR* path_old, /* Pointer to the object to be renamed */ 3715 const TCHAR* path_new /* Pointer to the new name */ 3716 ) 3717 { 3718 FRESULT res; 3719 DIR djo, djn; 3720 BYTE buf[21], *dir; 3721 DWORD dw; 3722 DEFINE_NAMEBUF; 3723 3724 3725 /* Get logical drive number of the source object */ 3726 res = find_volume(&djo.fs, &path_old, 1); 3727 if (res == FR_OK) { 3728 djn.fs = djo.fs; 3729 INIT_BUF(djo); 3730 res = follow_path(&djo, path_old); /* Check old object */ 3731 if (_FS_RPATH && res == FR_OK && (djo.fn[NSFLAG] & NS_DOT)) 3732 res = FR_INVALID_NAME; 3733 #if _FS_LOCK 3734 if (res == FR_OK) res = chk_lock(&djo, 2); 3735 #endif 3736 if (res == FR_OK) { /* Old object is found */ 3737 if (!djo.dir) { /* Is root dir? */ 3738 res = FR_NO_FILE; 3739 } else { 3740 mem_cpy(buf, djo.dir + DIR_Attr, 21); /* Save information about object except name */ 3741 mem_cpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */ 3742 if (get_ldnumber(&path_new) >= 0) /* Snip drive number off and ignore it */ 3743 res = follow_path(&djn, path_new); /* and make sure if new object name is not conflicting */ 3744 else 3745 res = FR_INVALID_DRIVE; 3746 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */ 3747 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */ 3748 res = dir_register(&djn); /* Register the new entry */ 3749 if (res == FR_OK) { 3750 /* Start of critical section where any interruption can cause a cross-link */ 3751 dir = djn.dir; /* Copy information about object except name */ 3752 mem_cpy(dir + 13, buf + 2, 19); 3753 dir[DIR_Attr] = buf[0] | AM_ARC; 3754 djo.fs->wflag = 1; 3755 if ((dir[DIR_Attr] & AM_DIR) && djo.sclust != djn.sclust) { /* Update .. entry in the sub-directory if needed */ 3756 dw = clust2sect(djo.fs, ld_clust(djo.fs, dir)); 3757 if (!dw) { 3758 res = FR_INT_ERR; 3759 } else { 3760 res = move_window(djo.fs, dw); 3761 dir = djo.fs->win + SZ_DIRE * 1; /* Ptr to .. entry */ 3762 if (res == FR_OK && dir[1] == '.') { 3763 st_clust(dir, djn.sclust); 3764 djo.fs->wflag = 1; 3765 } 3766 } 3767 } 3768 if (res == FR_OK) { 3769 res = dir_remove(&djo); /* Remove old entry */ 3770 if (res == FR_OK) 3771 res = sync_fs(djo.fs); 3772 } 3773 /* End of critical section */ 3774 } 3775 } 3776 } 3777 } 3778 FREE_BUF(); 3779 } 3780 3781 LEAVE_FF(djo.fs, res); 3782 } 3783 3784 3785 3786 3787 /*-----------------------------------------------------------------------*/ 3788 /* Change Timestamp */ 3789 /*-----------------------------------------------------------------------*/ 3790 3791 FRESULT f_utime ( 3792 const TCHAR* path, /* Pointer to the file/directory name */ 3793 const FILINFO* fno /* Pointer to the time stamp to be set */ 3794 ) 3795 { 3796 FRESULT res; 3797 DIR dj; 3798 BYTE *dir; 3799 DEFINE_NAMEBUF; 3800 3801 3802 /* Get logical drive number */ 3803 res = find_volume(&dj.fs, &path, 1); 3804 if (res == FR_OK) { 3805 INIT_BUF(dj); 3806 res = follow_path(&dj, path); /* Follow the file path */ 3807 FREE_BUF(); 3808 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) 3809 res = FR_INVALID_NAME; 3810 if (res == FR_OK) { 3811 dir = dj.dir; 3812 if (!dir) { /* Root directory */ 3813 res = FR_INVALID_NAME; 3814 } else { /* File or sub-directory */ 3815 ST_WORD(dir + DIR_WrtTime, fno->ftime); 3816 ST_WORD(dir + DIR_WrtDate, fno->fdate); 3817 dj.fs->wflag = 1; 3818 res = sync_fs(dj.fs); 3819 } 3820 } 3821 } 3822 3823 LEAVE_FF(dj.fs, res); 3824 } 3825 3826 #endif /* !_FS_READONLY */ 3827 #endif /* _FS_MINIMIZE == 0 */ 3828 #endif /* _FS_MINIMIZE <= 1 */ 3829 #endif /* _FS_MINIMIZE <= 2 */ 3830 3831 3832 3833 3834 #if _USE_LABEL 3835 /*-----------------------------------------------------------------------*/ 3836 /* Get volume label */ 3837 /*-----------------------------------------------------------------------*/ 3838 3839 FRESULT f_getlabel ( 3840 const TCHAR* path, /* Path name of the logical drive number */ 3841 TCHAR* label, /* Pointer to a buffer to return the volume label */ 3842 DWORD* vsn /* Pointer to a variable to return the volume serial number */ 3843 ) 3844 { 3845 FRESULT res; 3846 DIR dj; 3847 UINT i, j; 3848 #if _USE_LFN && _LFN_UNICODE 3849 WCHAR w; 3850 #endif 3851 3852 3853 /* Get logical drive number */ 3854 res = find_volume(&dj.fs, &path, 0); 3855 3856 /* Get volume label */ 3857 if (res == FR_OK && label) { 3858 dj.sclust = 0; /* Open root directory */ 3859 res = dir_sdi(&dj, 0); 3860 if (res == FR_OK) { 3861 res = dir_read(&dj, 1); /* Get an entry with AM_VOL */ 3862 if (res == FR_OK) { /* A volume label is exist */ 3863 #if _USE_LFN && _LFN_UNICODE 3864 i = j = 0; 3865 do { 3866 w = (i < 11) ? dj.dir[i++] : ' '; 3867 if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i])) 3868 w = w << 8 | dj.dir[i++]; 3869 label[j++] = ff_convert(w, 1); /* OEM -> Unicode */ 3870 } while (j < 11); 3871 #else 3872 mem_cpy(label, dj.dir, 11); 3873 #endif 3874 j = 11; 3875 do { 3876 label[j] = 0; 3877 if (!j) break; 3878 } while (label[--j] == ' '); 3879 } 3880 if (res == FR_NO_FILE) { /* No label, return nul string */ 3881 label[0] = 0; 3882 res = FR_OK; 3883 } 3884 } 3885 } 3886 3887 /* Get volume serial number */ 3888 if (res == FR_OK && vsn) { 3889 res = move_window(dj.fs, dj.fs->volbase); 3890 if (res == FR_OK) { 3891 i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID; 3892 *vsn = LD_DWORD(&dj.fs->win[i]); 3893 } 3894 } 3895 3896 LEAVE_FF(dj.fs, res); 3897 } 3898 3899 3900 3901 #if !_FS_READONLY 3902 /*-----------------------------------------------------------------------*/ 3903 /* Set volume label */ 3904 /*-----------------------------------------------------------------------*/ 3905 3906 FRESULT f_setlabel ( 3907 const TCHAR* label /* Pointer to the volume label to set */ 3908 ) 3909 { 3910 FRESULT res; 3911 DIR dj; 3912 BYTE vn[11]; 3913 UINT i, j, sl; 3914 WCHAR w; 3915 DWORD tm; 3916 3917 3918 /* Get logical drive number */ 3919 res = find_volume(&dj.fs, &label, 1); 3920 if (res) LEAVE_FF(dj.fs, res); 3921 3922 /* Create a volume label in directory form */ 3923 vn[0] = 0; 3924 for (sl = 0; label[sl]; sl++) ; /* Get name length */ 3925 for ( ; sl && label[sl - 1] == ' '; sl--) ; /* Remove trailing spaces */ 3926 if (sl) { /* Create volume label in directory form */ 3927 i = j = 0; 3928 do { 3929 #if _USE_LFN && _LFN_UNICODE 3930 w = ff_convert(ff_wtoupper(label[i++]), 0); 3931 #else 3932 w = (BYTE)label[i++]; 3933 if (IsDBCS1(w)) 3934 w = (j < 10 && i < sl && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0; 3935 #if _USE_LFN 3936 w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0); 3937 #else 3938 if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */ 3939 #ifdef _EXCVT 3940 if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */ 3941 #else 3942 if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */ 3943 #endif 3944 #endif 3945 #endif 3946 if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid characters for volume label */ 3947 LEAVE_FF(dj.fs, FR_INVALID_NAME); 3948 if (w >= 0x100) vn[j++] = (BYTE)(w >> 8); 3949 vn[j++] = (BYTE)w; 3950 } while (i < sl); 3951 while (j < 11) vn[j++] = ' '; /* Fill remaining name field */ 3952 if (vn[0] == DDEM) LEAVE_FF(dj.fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */ 3953 } 3954 3955 /* Set volume label */ 3956 dj.sclust = 0; /* Open root directory */ 3957 res = dir_sdi(&dj, 0); 3958 if (res == FR_OK) { 3959 res = dir_read(&dj, 1); /* Get an entry with AM_VOL */ 3960 if (res == FR_OK) { /* A volume label is found */ 3961 if (vn[0]) { 3962 mem_cpy(dj.dir, vn, 11); /* Change the volume label name */ 3963 tm = GET_FATTIME(); 3964 ST_DWORD(dj.dir + DIR_CrtTime, tm); 3965 ST_DWORD(dj.dir + DIR_WrtTime, tm); 3966 } else { 3967 dj.dir[0] = DDEM; /* Remove the volume label */ 3968 } 3969 dj.fs->wflag = 1; 3970 res = sync_fs(dj.fs); 3971 } else { /* No volume label is found or error */ 3972 if (res == FR_NO_FILE) { 3973 res = FR_OK; 3974 if (vn[0]) { /* Create volume label as new */ 3975 res = dir_alloc(&dj, 1); /* Allocate an entry for volume label */ 3976 if (res == FR_OK) { 3977 mem_set(dj.dir, 0, SZ_DIRE); /* Set volume label */ 3978 mem_cpy(dj.dir, vn, 11); 3979 dj.dir[DIR_Attr] = AM_VOL; 3980 tm = GET_FATTIME(); 3981 ST_DWORD(dj.dir + DIR_CrtTime, tm); 3982 ST_DWORD(dj.dir + DIR_WrtTime, tm); 3983 dj.fs->wflag = 1; 3984 res = sync_fs(dj.fs); 3985 } 3986 } 3987 } 3988 } 3989 } 3990 3991 LEAVE_FF(dj.fs, res); 3992 } 3993 3994 #endif /* !_FS_READONLY */ 3995 #endif /* _USE_LABEL */ 3996 3997 3998 3999 /*-----------------------------------------------------------------------*/ 4000 /* Forward data to the stream directly (available on only tiny cfg) */ 4001 /*-----------------------------------------------------------------------*/ 4002 #if _USE_FORWARD && _FS_TINY 4003 4004 FRESULT f_forward ( 4005 FIL* fp, /* Pointer to the file object */ 4006 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ 4007 UINT btf, /* Number of bytes to forward */ 4008 UINT* bf /* Pointer to number of bytes forwarded */ 4009 ) 4010 { 4011 FRESULT res; 4012 DWORD remain, clst, sect; 4013 UINT rcnt; 4014 BYTE csect; 4015 4016 4017 *bf = 0; /* Clear transfer byte counter */ 4018 4019 res = validate(fp); /* Check validity of the object */ 4020 if (res != FR_OK) LEAVE_FF(fp->fs, res); 4021 if (fp->err) /* Check error */ 4022 LEAVE_FF(fp->fs, (FRESULT)fp->err); 4023 if (!(fp->flag & FA_READ)) /* Check access mode */ 4024 LEAVE_FF(fp->fs, FR_DENIED); 4025 4026 remain = fp->fsize - fp->fptr; 4027 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */ 4028 4029 for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */ 4030 fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) { 4031 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 4032 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 4033 if (!csect) { /* On the cluster boundary? */ 4034 clst = (fp->fptr == 0) ? /* On the top of the file? */ 4035 fp->sclust : get_fat(fp->fs, fp->clust); 4036 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR); 4037 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 4038 fp->clust = clst; /* Update current cluster */ 4039 } 4040 } 4041 sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */ 4042 if (!sect) ABORT(fp->fs, FR_INT_ERR); 4043 sect += csect; 4044 if (move_window(fp->fs, sect) != FR_OK) /* Move sector window */ 4045 ABORT(fp->fs, FR_DISK_ERR); 4046 fp->dsect = sect; 4047 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */ 4048 if (rcnt > btf) rcnt = btf; 4049 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt); 4050 if (!rcnt) ABORT(fp->fs, FR_INT_ERR); 4051 } 4052 4053 LEAVE_FF(fp->fs, FR_OK); 4054 } 4055 #endif /* _USE_FORWARD */ 4056 4057 4058 4059 #if _USE_MKFS && !_FS_READONLY 4060 /*-----------------------------------------------------------------------*/ 4061 /* Create file system on the logical drive */ 4062 /*-----------------------------------------------------------------------*/ 4063 #define N_ROOTDIR12 224 /* Number of root directory entries for FAT12 */ 4064 #define N_ROOTDIR16 512 /* Number of root directory entries for FAT16 */ 4065 #define N_FATS 2 /* Number of FATs (1 or 2) */ 4066 4067 4068 FRESULT f_mkfs ( 4069 const TCHAR* path, /* Logical drive number */ 4070 BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */ 4071 UINT au /* Size of allocation unit in unit of byte or sector */ 4072 ) 4073 { 4074 static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0}; 4075 static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512}; 4076 int vol; 4077 BYTE fmt, md, sys, *tbl, pdrv, part; 4078 DWORD n_clst, vs, n, wsect; 4079 UINT i; 4080 DWORD b_vol, b_fat, b_dir, b_data; /* LBA */ 4081 DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */ 4082 FATFS *fs; 4083 DSTATUS stat; 4084 #if _USE_TRIM 4085 DWORD eb[2]; 4086 #endif 4087 4088 4089 /* Check mounted drive and clear work area */ 4090 if (sfd > 1) return FR_INVALID_PARAMETER; 4091 vol = get_ldnumber(&path); 4092 if (vol < 0) return FR_INVALID_DRIVE; 4093 fs = FatFs[vol]; 4094 if (!fs) return FR_NOT_ENABLED; 4095 fs->fs_type = 0; 4096 pdrv = LD2PD(vol); /* Physical drive */ 4097 part = LD2PT(vol); /* Partition (0:auto detect, 1-4:get from partition table)*/ 4098 4099 /* Get disk statics */ 4100 stat = disk_initialize(pdrv); 4101 if (stat & STA_NOINIT) return FR_NOT_READY; 4102 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 4103 #if _MAX_SS != _MIN_SS /* Get disk sector size */ 4104 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS || SS(fs) < _MIN_SS) 4105 return FR_DISK_ERR; 4106 #endif 4107 if (_MULTI_PARTITION && part) { 4108 /* Get partition information from partition table in the MBR */ 4109 if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR; 4110 if (LD_WORD(fs->win + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED; 4111 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE]; 4112 if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */ 4113 b_vol = LD_DWORD(tbl + 8); /* Volume start sector */ 4114 n_vol = LD_DWORD(tbl + 12); /* Volume size */ 4115 } else { 4116 /* Create a partition in this function */ 4117 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128) 4118 return FR_DISK_ERR; 4119 b_vol = (sfd) ? 0 : 63; /* Volume start sector */ 4120 n_vol -= b_vol; /* Volume size */ 4121 } 4122 4123 if (au & (au - 1)) au = 0; 4124 if (!au) { /* AU auto selection */ 4125 vs = n_vol / (2000 / (SS(fs) / 512)); 4126 for (i = 0; vs < vst[i]; i++) ; 4127 au = cst[i]; 4128 } 4129 if (au >= _MIN_SS) au /= SS(fs); /* Number of sectors per cluster */ 4130 if (!au) au = 1; 4131 if (au > 128) au = 128; 4132 4133 /* Pre-compute number of clusters and FAT sub-type */ 4134 n_clst = n_vol / au; 4135 fmt = FS_FAT12; 4136 if (n_clst >= MIN_FAT16) fmt = FS_FAT16; 4137 if (n_clst >= MIN_FAT32) fmt = FS_FAT32; 4138 4139 /* Determine offset and size of FAT structure */ 4140 if (fmt == FS_FAT32) { 4141 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs); 4142 n_rsv = 32; 4143 n_dir = 0; 4144 } else { 4145 n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4; 4146 n_fat = (n_fat + SS(fs) - 1) / SS(fs); 4147 n_rsv = 1; 4148 if (fmt == FS_FAT12) 4149 n_dir = (DWORD)N_ROOTDIR12 * SZ_DIRE / SS(fs); 4150 else 4151 n_dir = (DWORD)N_ROOTDIR16 * SZ_DIRE / SS(fs); 4152 } 4153 b_fat = b_vol + n_rsv; /* FAT area start sector */ 4154 b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */ 4155 b_data = b_dir + n_dir; /* Data area start sector */ 4156 if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */ 4157 4158 /* Align data start sector to erase block boundary (for flash memory media) */ 4159 if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1; 4160 n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */ 4161 n = (n - b_data) / N_FATS; 4162 if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */ 4163 n_rsv += n; 4164 b_fat += n; 4165 } else if (fmt == FS_FAT16) { /* FAT16: Expand FAT size */ 4166 n_fat += n; 4167 } // else /* if (fmt == FS_FAT12) */ {} /* FAT12: Do nothing */ 4168 4169 /* Determine number of clusters and final check of validity of the FAT sub-type */ 4170 n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au; 4171 if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16) 4172 || (fmt == FS_FAT32 && n_clst < MIN_FAT32)) 4173 return FR_MKFS_ABORTED; 4174 4175 /* Determine system ID in the partition table */ 4176 if (fmt == FS_FAT32) { 4177 sys = 0x0C; /* FAT32X */ 4178 } else { 4179 if (fmt == FS_FAT12 && n_vol < 0x10000) { 4180 sys = 0x01; /* FAT12(<65536) */ 4181 } else { 4182 sys = (n_vol < 0x10000) ? 0x04 : 0x06; /* FAT16(<65536) : FAT12/16(>=65536) */ 4183 } 4184 } 4185 4186 if (_MULTI_PARTITION && part) { 4187 /* Update system ID in the partition table */ 4188 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE]; 4189 tbl[4] = sys; 4190 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to teh MBR */ 4191 return FR_DISK_ERR; 4192 md = 0xF8; 4193 } else { 4194 if (sfd) { /* No partition table (SFD) */ 4195 md = 0xF0; 4196 } else { /* Create partition table (FDISK) */ 4197 mem_set(fs->win, 0, SS(fs)); 4198 tbl = fs->win + MBR_Table; /* Create partition table for single partition in the drive */ 4199 tbl[1] = 1; /* Partition start head */ 4200 tbl[2] = 1; /* Partition start sector */ 4201 tbl[3] = 0; /* Partition start cylinder */ 4202 tbl[4] = sys; /* System type */ 4203 tbl[5] = 254; /* Partition end head */ 4204 n = (b_vol + n_vol) / 63 / 255; 4205 tbl[6] = (BYTE)(n >> 2 | 63); /* Partition end sector */ 4206 tbl[7] = (BYTE)n; /* End cylinder */ 4207 ST_DWORD(tbl + 8, 63); /* Partition start in LBA */ 4208 ST_DWORD(tbl + 12, n_vol); /* Partition size in LBA */ 4209 ST_WORD(fs->win + BS_55AA, 0xAA55); /* MBR signature */ 4210 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR */ 4211 return FR_DISK_ERR; 4212 md = 0xF8; 4213 } 4214 } 4215 4216 /* Create BPB in the VBR */ 4217 tbl = fs->win; /* Clear sector */ 4218 mem_set(tbl, 0, SS(fs)); 4219 mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */ 4220 i = SS(fs); /* Sector size */ 4221 ST_WORD(tbl + BPB_BytsPerSec, i); 4222 tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */ 4223 ST_WORD(tbl + BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */ 4224 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */ 4225 i = (fmt == FS_FAT32) ? 0 : (fmt == FS_FAT12 ? N_ROOTDIR12 : N_ROOTDIR16); /* Number of root directory entries */ 4226 ST_WORD(tbl + BPB_RootEntCnt, i); 4227 if (n_vol < 0x10000) { /* Number of total sectors */ 4228 ST_WORD(tbl + BPB_TotSec16, n_vol); 4229 } else { 4230 ST_DWORD(tbl + BPB_TotSec32, n_vol); 4231 } 4232 tbl[BPB_Media] = md; /* Media descriptor */ 4233 ST_DWORD(tbl + BPB_HiddSec, b_vol); /* Hidden sectors */ 4234 n = GET_FATTIME(); /* Use current time as VSN */ 4235 if (fmt == FS_FAT32) { 4236 ST_WORD(tbl + BPB_SecPerTrk, 63); /* Number of sectors per track */ 4237 ST_WORD(tbl + BPB_NumHeads, 255); /* Number of heads */ 4238 ST_DWORD(tbl + BS_VolID32, n); /* VSN */ 4239 ST_DWORD(tbl + BPB_FATSz32, n_fat); /* Number of sectors per FAT */ 4240 ST_DWORD(tbl + BPB_RootClus, 2); /* Root directory start cluster (2) */ 4241 ST_WORD(tbl + BPB_FSInfo, 1); /* FSINFO record offset (VBR + 1) */ 4242 ST_WORD(tbl + BPB_BkBootSec, 6); /* Backup boot record offset (VBR + 6) */ 4243 tbl[BS_DrvNum32] = 0x80; /* Drive number */ 4244 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */ 4245 mem_cpy(tbl + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ 4246 } else if (fmt == FS_FAT16) { 4247 ST_WORD(tbl + BPB_SecPerTrk, 63); /* Number of sectors per track */ 4248 ST_WORD(tbl + BPB_NumHeads, 255); /* Number of heads */ 4249 ST_DWORD(tbl + BS_VolID, n); /* VSN */ 4250 ST_WORD(tbl + BPB_FATSz16, n_fat); /* Number of sectors per FAT */ 4251 tbl[BS_DrvNum] = 0x80; /* Drive number */ 4252 tbl[BS_BootSig] = 0x29; /* Extended boot signature */ 4253 mem_cpy(tbl + BS_VolLab, "NO NAME " "FAT16 ", 19); /* Volume label, FAT signature */ 4254 } else /* if (fmt == FS_FAT12) */ { 4255 /* Assume floppy characteristics */ 4256 ST_WORD(tbl + BPB_SecPerTrk, 0x12); /* Number of sectors per track */ 4257 ST_WORD(tbl + BPB_NumHeads, 0x02); /* Number of heads */ 4258 ST_DWORD(tbl + BS_VolID, n); /* VSN */ 4259 ST_WORD(tbl + BPB_FATSz16, n_fat); /* Number of sectors per FAT */ 4260 tbl[BS_DrvNum] = 0x00; /* Drive number */ 4261 tbl[BS_BootSig] = 0x29; /* Extended boot signature */ 4262 mem_cpy(tbl + BS_VolLab, "NO NAME " "FAT12 ", 19); /* Volume label, FAT signature */ 4263 } 4264 ST_WORD(tbl + BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */ 4265 if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */ 4266 return FR_DISK_ERR; 4267 if (fmt == FS_FAT32) /* Write it to the backup VBR if needed (VBR + 6) */ 4268 disk_write(pdrv, tbl, b_vol + 6, 1); 4269 4270 /* Initialize FAT area */ 4271 wsect = b_fat; 4272 for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */ 4273 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */ 4274 n = md; /* Media descriptor byte */ 4275 if (fmt != FS_FAT32) { 4276 n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00; 4277 ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT12/16) */ 4278 } else { 4279 n |= 0xFFFFFF00; 4280 ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT32) */ 4281 ST_DWORD(tbl + 4, 0xFFFFFFFF); 4282 ST_DWORD(tbl + 8, 0x0FFFFFFF); /* Reserve cluster #2 for root directory */ 4283 } 4284 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) 4285 return FR_DISK_ERR; 4286 mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */ 4287 for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */ 4288 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) 4289 return FR_DISK_ERR; 4290 } 4291 } 4292 4293 /* Initialize root directory */ 4294 i = (fmt == FS_FAT32) ? au : (UINT)n_dir; 4295 do { 4296 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) 4297 return FR_DISK_ERR; 4298 } while (--i); 4299 4300 #if _USE_TRIM /* Erase data area if needed */ 4301 { 4302 eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1; 4303 disk_ioctl(pdrv, CTRL_TRIM, eb); 4304 } 4305 #endif 4306 4307 /* Create FSINFO if needed */ 4308 if (fmt == FS_FAT32) { 4309 ST_DWORD(tbl + FSI_LeadSig, 0x41615252); 4310 ST_DWORD(tbl + FSI_StrucSig, 0x61417272); 4311 ST_DWORD(tbl + FSI_Free_Count, n_clst - 1); /* Number of free clusters */ 4312 ST_DWORD(tbl + FSI_Nxt_Free, 2); /* Last allocated cluster# */ 4313 ST_WORD(tbl + BS_55AA, 0xAA55); 4314 disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR + 1) */ 4315 disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR + 7) */ 4316 } 4317 4318 return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR; 4319 } 4320 4321 4322 4323 #if _MULTI_PARTITION 4324 /*-----------------------------------------------------------------------*/ 4325 /* Create partition table on the physical drive */ 4326 /*-----------------------------------------------------------------------*/ 4327 4328 FRESULT f_fdisk ( 4329 BYTE pdrv, /* Physical drive number */ 4330 const DWORD szt[], /* Pointer to the size table for each partitions */ 4331 void* work /* Pointer to the working buffer */ 4332 ) 4333 { 4334 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl; 4335 BYTE s_hd, e_hd, *p, *buf = (BYTE*)work; 4336 DSTATUS stat; 4337 DWORD sz_disk, sz_part, s_part; 4338 4339 4340 stat = disk_initialize(pdrv); 4341 if (stat & STA_NOINIT) return FR_NOT_READY; 4342 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 4343 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR; 4344 4345 /* Determine CHS in the table regardless of the drive geometry */ 4346 for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ; 4347 if (n == 256) n--; 4348 e_hd = n - 1; 4349 sz_cyl = 63 * n; 4350 tot_cyl = sz_disk / sz_cyl; 4351 4352 /* Create partition table */ 4353 mem_set(buf, 0, _MAX_SS); 4354 p = buf + MBR_Table; b_cyl = 0; 4355 for (i = 0; i < 4; i++, p += SZ_PTE) { 4356 p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl; 4357 if (!p_cyl) continue; 4358 s_part = (DWORD)sz_cyl * b_cyl; 4359 sz_part = (DWORD)sz_cyl * p_cyl; 4360 if (i == 0) { /* Exclude first track of cylinder 0 */ 4361 s_hd = 1; 4362 s_part += 63; sz_part -= 63; 4363 } else { 4364 s_hd = 0; 4365 } 4366 e_cyl = b_cyl + p_cyl - 1; 4367 if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER; 4368 4369 /* Set partition table */ 4370 p[1] = s_hd; /* Start head */ 4371 p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */ 4372 p[3] = (BYTE)b_cyl; /* Start cylinder */ 4373 p[4] = 0x06; /* System type (temporary setting) */ 4374 p[5] = e_hd; /* End head */ 4375 p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */ 4376 p[7] = (BYTE)e_cyl; /* End cylinder */ 4377 ST_DWORD(p + 8, s_part); /* Start sector in LBA */ 4378 ST_DWORD(p + 12, sz_part); /* Partition size */ 4379 4380 /* Next partition */ 4381 b_cyl += p_cyl; 4382 } 4383 ST_WORD(p, 0xAA55); 4384 4385 /* Write it to the MBR */ 4386 return (disk_write(pdrv, buf, 0, 1) != RES_OK || disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK; 4387 } 4388 4389 4390 #endif /* _MULTI_PARTITION */ 4391 #endif /* _USE_MKFS && !_FS_READONLY */ 4392 4393 4394 4395 4396 #if _USE_STRFUNC 4397 /*-----------------------------------------------------------------------*/ 4398 /* Get a string from the file */ 4399 /*-----------------------------------------------------------------------*/ 4400 4401 TCHAR* f_gets ( 4402 TCHAR* buff, /* Pointer to the string buffer to read */ 4403 int len, /* Size of string buffer (characters) */ 4404 FIL* fp /* Pointer to the file object */ 4405 ) 4406 { 4407 int n = 0; 4408 TCHAR c, *p = buff; 4409 BYTE s[2]; 4410 UINT rc; 4411 4412 4413 while (n < len - 1) { /* Read characters until buffer gets filled */ 4414 #if _USE_LFN && _LFN_UNICODE 4415 #if _STRF_ENCODE == 3 /* Read a character in UTF-8 */ 4416 f_read(fp, s, 1, &rc); 4417 if (rc != 1) break; 4418 c = s[0]; 4419 if (c >= 0x80) { 4420 if (c < 0xC0) continue; /* Skip stray trailer */ 4421 if (c < 0xE0) { /* Two-byte sequence */ 4422 f_read(fp, s, 1, &rc); 4423 if (rc != 1) break; 4424 c = (c & 0x1F) << 6 | (s[0] & 0x3F); 4425 if (c < 0x80) c = '?'; 4426 } else { 4427 if (c < 0xF0) { /* Three-byte sequence */ 4428 f_read(fp, s, 2, &rc); 4429 if (rc != 2) break; 4430 c = c << 12 | (s[0] & 0x3F) << 6 | (s[1] & 0x3F); 4431 if (c < 0x800) c = '?'; 4432 } else { /* Reject four-byte sequence */ 4433 c = '?'; 4434 } 4435 } 4436 } 4437 #elif _STRF_ENCODE == 2 /* Read a character in UTF-16BE */ 4438 f_read(fp, s, 2, &rc); 4439 if (rc != 2) break; 4440 c = s[1] + (s[0] << 8); 4441 #elif _STRF_ENCODE == 1 /* Read a character in UTF-16LE */ 4442 f_read(fp, s, 2, &rc); 4443 if (rc != 2) break; 4444 c = s[0] + (s[1] << 8); 4445 #else /* Read a character in ANSI/OEM */ 4446 f_read(fp, s, 1, &rc); 4447 if (rc != 1) break; 4448 c = s[0]; 4449 if (IsDBCS1(c)) { 4450 f_read(fp, s, 1, &rc); 4451 if (rc != 1) break; 4452 c = (c << 8) + s[0]; 4453 } 4454 c = ff_convert(c, 1); /* OEM -> Unicode */ 4455 if (!c) c = '?'; 4456 #endif 4457 #else /* Read a character without conversion */ 4458 f_read(fp, s, 1, &rc); 4459 if (rc != 1) break; 4460 c = s[0]; 4461 #endif 4462 if (_USE_STRFUNC == 2 && c == '\r') continue; /* Strip '\r' */ 4463 *p++ = c; 4464 n++; 4465 if (c == '\n') break; /* Break on EOL */ 4466 } 4467 *p = 0; 4468 return n ? buff : 0; /* When no data read (eof or error), return with error. */ 4469 } 4470 4471 4472 4473 4474 #if !_FS_READONLY 4475 #include <stdarg.h> 4476 /*-----------------------------------------------------------------------*/ 4477 /* Put a character to the file */ 4478 /*-----------------------------------------------------------------------*/ 4479 4480 typedef struct { 4481 FIL* fp; 4482 int idx, nchr; 4483 BYTE buf[64]; 4484 } putbuff; 4485 4486 4487 static 4488 void putc_bfd ( 4489 putbuff* pb, 4490 TCHAR c 4491 ) 4492 { 4493 UINT bw; 4494 int i; 4495 4496 4497 if (_USE_STRFUNC == 2 && c == '\n') /* LF -> CRLF conversion */ 4498 putc_bfd(pb, '\r'); 4499 4500 i = pb->idx; /* Buffer write index (-1:error) */ 4501 if (i < 0) return; 4502 4503 #if _USE_LFN && _LFN_UNICODE 4504 #if _STRF_ENCODE == 3 /* Write a character in UTF-8 */ 4505 if (c < 0x80) { /* 7-bit */ 4506 pb->buf[i++] = (BYTE)c; 4507 } else { 4508 if (c < 0x800) { /* 11-bit */ 4509 pb->buf[i++] = (BYTE)(0xC0 | c >> 6); 4510 } else { /* 16-bit */ 4511 pb->buf[i++] = (BYTE)(0xE0 | c >> 12); 4512 pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F)); 4513 } 4514 pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F)); 4515 } 4516 #elif _STRF_ENCODE == 2 /* Write a character in UTF-16BE */ 4517 pb->buf[i++] = (BYTE)(c >> 8); 4518 pb->buf[i++] = (BYTE)c; 4519 #elif _STRF_ENCODE == 1 /* Write a character in UTF-16LE */ 4520 pb->buf[i++] = (BYTE)c; 4521 pb->buf[i++] = (BYTE)(c >> 8); 4522 #else /* Write a character in ANSI/OEM */ 4523 c = ff_convert(c, 0); /* Unicode -> OEM */ 4524 if (!c) c = '?'; 4525 if (c >= 0x100) 4526 pb->buf[i++] = (BYTE)(c >> 8); 4527 pb->buf[i++] = (BYTE)c; 4528 #endif 4529 #else /* Write a character without conversion */ 4530 pb->buf[i++] = (BYTE)c; 4531 #endif 4532 4533 if (i >= (int)(sizeof pb->buf) - 3) { /* Write buffered characters to the file */ 4534 f_write(pb->fp, pb->buf, (UINT)i, &bw); 4535 i = (bw == (UINT)i) ? 0 : -1; 4536 } 4537 pb->idx = i; 4538 pb->nchr++; 4539 } 4540 4541 4542 4543 int f_putc ( 4544 TCHAR c, /* A character to be output */ 4545 FIL* fp /* Pointer to the file object */ 4546 ) 4547 { 4548 putbuff pb; 4549 UINT nw; 4550 4551 4552 pb.fp = fp; /* Initialize output buffer */ 4553 pb.nchr = pb.idx = 0; 4554 4555 putc_bfd(&pb, c); /* Put a character */ 4556 4557 if ( pb.idx >= 0 /* Flush buffered characters to the file */ 4558 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK 4559 && (UINT)pb.idx == nw) return pb.nchr; 4560 return EOF; 4561 } 4562 4563 4564 4565 4566 /*-----------------------------------------------------------------------*/ 4567 /* Put a string to the file */ 4568 /*-----------------------------------------------------------------------*/ 4569 4570 int f_puts ( 4571 const TCHAR* str, /* Pointer to the string to be output */ 4572 FIL* fp /* Pointer to the file object */ 4573 ) 4574 { 4575 putbuff pb; 4576 UINT nw; 4577 4578 4579 pb.fp = fp; /* Initialize output buffer */ 4580 pb.nchr = pb.idx = 0; 4581 4582 while (*str) /* Put the string */ 4583 putc_bfd(&pb, *str++); 4584 4585 if ( pb.idx >= 0 /* Flush buffered characters to the file */ 4586 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK 4587 && (UINT)pb.idx == nw) return pb.nchr; 4588 return EOF; 4589 } 4590 4591 4592 4593 4594 /*-----------------------------------------------------------------------*/ 4595 /* Put a formatted string to the file */ 4596 /*-----------------------------------------------------------------------*/ 4597 4598 int f_printf ( 4599 FIL* fp, /* Pointer to the file object */ 4600 const TCHAR* fmt, /* Pointer to the format string */ 4601 ... /* Optional arguments... */ 4602 ) 4603 { 4604 va_list arp; 4605 BYTE f, r; 4606 UINT nw, i, j, w; 4607 DWORD v; 4608 TCHAR c, d, s[16], *p; 4609 putbuff pb; 4610 4611 4612 pb.fp = fp; /* Initialize output buffer */ 4613 pb.nchr = pb.idx = 0; 4614 4615 va_start(arp, fmt); 4616 4617 for (;;) { 4618 c = *fmt++; 4619 if (c == 0) break; /* End of string */ 4620 if (c != '%') { /* Non escape character */ 4621 putc_bfd(&pb, c); 4622 continue; 4623 } 4624 w = f = 0; 4625 c = *fmt++; 4626 if (c == '0') { /* Flag: '0' padding */ 4627 f = 1; c = *fmt++; 4628 } else { 4629 if (c == '-') { /* Flag: left justified */ 4630 f = 2; c = *fmt++; 4631 } 4632 } 4633 while (IsDigit(c)) { /* Precision */ 4634 w = w * 10 + c - '0'; 4635 c = *fmt++; 4636 } 4637 if (c == 'l' || c == 'L') { /* Prefix: Size is long int */ 4638 f |= 4; c = *fmt++; 4639 } 4640 if (!c) break; 4641 d = c; 4642 if (IsLower(d)) d -= 0x20; 4643 switch (d) { /* Type is... */ 4644 case 'S' : /* String */ 4645 p = va_arg(arp, TCHAR*); 4646 for (j = 0; p[j]; j++) ; 4647 if (!(f & 2)) { 4648 while (j++ < w) putc_bfd(&pb, ' '); 4649 } 4650 while (*p) putc_bfd(&pb, *p++); 4651 while (j++ < w) putc_bfd(&pb, ' '); 4652 continue; 4653 case 'C' : /* Character */ 4654 putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue; 4655 case 'B' : /* Binary */ 4656 r = 2; break; 4657 case 'O' : /* Octal */ 4658 r = 8; break; 4659 case 'D' : /* Signed decimal */ 4660 case 'U' : /* Unsigned decimal */ 4661 r = 10; break; 4662 case 'X' : /* Hexdecimal */ 4663 r = 16; break; 4664 default: /* Unknown type (pass-through) */ 4665 putc_bfd(&pb, c); continue; 4666 } 4667 4668 /* Get an argument and put it in numeral */ 4669 v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int)); 4670 if (d == 'D' && (v & 0x80000000)) { 4671 v = 0 - v; 4672 f |= 8; 4673 } 4674 i = 0; 4675 do { 4676 d = (TCHAR)(v % r); v /= r; 4677 if (d > 9) d += (c == 'x') ? 0x27 : 0x07; 4678 s[i++] = d + '0'; 4679 } while (v && i < sizeof s / sizeof s[0]); 4680 if (f & 8) s[i++] = '-'; 4681 j = i; d = (f & 1) ? '0' : ' '; 4682 while (!(f & 2) && j++ < w) putc_bfd(&pb, d); 4683 do putc_bfd(&pb, s[--i]); while (i); 4684 while (j++ < w) putc_bfd(&pb, d); 4685 } 4686 4687 va_end(arp); 4688 4689 if ( pb.idx >= 0 /* Flush buffered characters to the file */ 4690 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK 4691 && (UINT)pb.idx == nw) return pb.nchr; 4692 return EOF; 4693 } 4694 4695 #endif /* !_FS_READONLY */ 4696 #endif /* _USE_STRFUNC */ 4697