1 /*----------------------------------------------------------------------------/ 2 / FatFs - Generic FAT file system module R0.12b / 3 /-----------------------------------------------------------------------------/ 4 / 5 / Copyright (C) 2016, ChaN, all right reserved. 6 / 7 / FatFs module is an open source software. Redistribution and use of FatFs in 8 / source and binary forms, with or without modification, are permitted provided 9 / that the following condition is met: 10 11 / 1. Redistributions of source code must retain the above copyright notice, 12 / this condition and the following disclaimer. 13 / 14 / This software is provided by the copyright holder and contributors "AS IS" 15 / and any warranties related to this software are DISCLAIMED. 16 / The copyright owner or contributors be NOT LIABLE for any damages caused 17 / by use of this software. 18 /----------------------------------------------------------------------------*/ 19 20 21 #include "ff.h" /* Declarations of FatFs API */ 22 #include "diskio.h" /* Declarations of device I/O functions */ 23 24 25 /*-------------------------------------------------------------------------- 26 27 Module Private Definitions 28 29 ---------------------------------------------------------------------------*/ 30 31 #if _FATFS != 68020 /* Revision ID */ 32 #error Wrong include file (ff.h). 33 #endif 34 35 36 #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); } 37 38 39 /* Reentrancy related */ 40 #if _FS_REENTRANT 41 #if _USE_LFN == 1 42 #error Static LFN work area cannot be used at thread-safe configuration 43 #endif 44 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; } 45 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } 46 #else 47 #define ENTER_FF(fs) 48 #define LEAVE_FF(fs, res) return res 49 #endif 50 51 52 53 /* Definitions of sector size */ 54 #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) 55 #error Wrong sector size configuration 56 #endif 57 #if _MAX_SS == _MIN_SS 58 #define SS(fs) ((UINT)_MAX_SS) /* Fixed sector size */ 59 #else 60 #define SS(fs) ((fs)->ssize) /* Variable sector size */ 61 #endif 62 63 64 /* Timestamp */ 65 #if _FS_NORTC == 1 66 #if _NORTC_YEAR < 1980 || _NORTC_YEAR > 2107 || _NORTC_MON < 1 || _NORTC_MON > 12 || _NORTC_MDAY < 1 || _NORTC_MDAY > 31 67 #error Invalid _FS_NORTC settings 68 #endif 69 #define GET_FATTIME() ((DWORD)(_NORTC_YEAR - 1980) << 25 | (DWORD)_NORTC_MON << 21 | (DWORD)_NORTC_MDAY << 16) 70 #else 71 #define GET_FATTIME() get_fattime() 72 #endif 73 74 75 /* File lock controls */ 76 #if _FS_LOCK != 0 77 #if _FS_READONLY 78 #error _FS_LOCK must be 0 at read-only configuration 79 #endif 80 typedef struct { 81 FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */ 82 DWORD clu; /* Object ID 2, directory (0:root) */ 83 DWORD ofs; /* Object ID 3, directory offset */ 84 WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */ 85 } FILESEM; 86 #endif 87 88 89 90 /* DBCS code ranges and SBCS upper conversion tables */ 91 92 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */ 93 #define _DF1S 0x81 /* DBC 1st byte range 1 start */ 94 #define _DF1E 0x9F /* DBC 1st byte range 1 end */ 95 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */ 96 #define _DF2E 0xFC /* DBC 1st byte range 2 end */ 97 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */ 98 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */ 99 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */ 100 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */ 101 102 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */ 103 #define _DF1S 0x81 104 #define _DF1E 0xFE 105 #define _DS1S 0x40 106 #define _DS1E 0x7E 107 #define _DS2S 0x80 108 #define _DS2E 0xFE 109 110 #elif _CODE_PAGE == 949 /* Korean */ 111 #define _DF1S 0x81 112 #define _DF1E 0xFE 113 #define _DS1S 0x41 114 #define _DS1E 0x5A 115 #define _DS2S 0x61 116 #define _DS2E 0x7A 117 #define _DS3S 0x81 118 #define _DS3E 0xFE 119 120 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */ 121 #define _DF1S 0x81 122 #define _DF1E 0xFE 123 #define _DS1S 0x40 124 #define _DS1E 0x7E 125 #define _DS2S 0xA1 126 #define _DS2E 0xFE 127 128 #elif _CODE_PAGE == 437 /* U.S. */ 129 #define _DF1S 0 130 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 131 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 132 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 133 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 134 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 135 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 136 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 137 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 138 139 #elif _CODE_PAGE == 720 /* Arabic */ 140 #define _DF1S 0 141 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 142 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 143 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 144 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 145 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 146 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 147 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 148 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 149 150 #elif _CODE_PAGE == 737 /* Greek */ 151 #define _DF1S 0 152 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 153 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \ 154 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \ 155 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 156 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 157 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 158 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 159 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 160 161 #elif _CODE_PAGE == 771 /* KBL */ 162 #define _DF1S 0 163 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 164 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 165 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 166 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 167 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 168 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \ 169 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 170 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF} 171 172 #elif _CODE_PAGE == 775 /* Baltic */ 173 #define _DF1S 0 174 #define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \ 175 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 176 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 177 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 178 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 179 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 180 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \ 181 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 182 183 #elif _CODE_PAGE == 850 /* Latin 1 */ 184 #define _DF1S 0 185 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \ 186 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \ 187 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 188 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 189 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 190 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \ 191 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \ 192 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 193 194 #elif _CODE_PAGE == 852 /* Latin 2 */ 195 #define _DF1S 0 196 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \ 197 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \ 198 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \ 199 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \ 200 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 201 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 202 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \ 203 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF} 204 205 #elif _CODE_PAGE == 855 /* Cyrillic */ 206 #define _DF1S 0 207 #define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \ 208 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \ 209 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \ 210 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \ 211 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 212 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \ 213 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \ 214 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF} 215 216 #elif _CODE_PAGE == 857 /* Turkish */ 217 #define _DF1S 0 218 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \ 219 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \ 220 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 221 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 222 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 223 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 224 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \ 225 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 226 227 #elif _CODE_PAGE == 860 /* Portuguese */ 228 #define _DF1S 0 229 #define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \ 230 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 231 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 232 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 233 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 234 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 235 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 236 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 237 238 #elif _CODE_PAGE == 861 /* Icelandic */ 239 #define _DF1S 0 240 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \ 241 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 242 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 243 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 244 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 245 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 246 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 247 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 248 249 #elif _CODE_PAGE == 862 /* Hebrew */ 250 #define _DF1S 0 251 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 252 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 253 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 254 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 255 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 256 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 257 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 258 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 259 260 #elif _CODE_PAGE == 863 /* Canadian-French */ 261 #define _DF1S 0 262 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \ 263 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \ 264 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 265 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 266 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 267 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 268 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 269 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 270 271 #elif _CODE_PAGE == 864 /* Arabic */ 272 #define _DF1S 0 273 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 274 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 275 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 276 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 277 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 278 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 279 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 280 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 281 282 #elif _CODE_PAGE == 865 /* Nordic */ 283 #define _DF1S 0 284 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 285 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 286 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 287 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 288 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 289 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 290 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 291 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 292 293 #elif _CODE_PAGE == 866 /* Russian */ 294 #define _DF1S 0 295 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 296 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 297 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 298 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 299 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 300 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 301 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 302 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 303 304 #elif _CODE_PAGE == 869 /* Greek 2 */ 305 #define _DF1S 0 306 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 307 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \ 308 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 309 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 310 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 311 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \ 312 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \ 313 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF} 314 315 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */ 316 #if _USE_LFN != 0 317 #error Cannot enable LFN without valid code page. 318 #endif 319 #define _DF1S 0 320 321 #else 322 #error Unknown code page 323 324 #endif 325 326 327 /* Character code support macros */ 328 #define IsUpper(c) (((c)>='A')&&((c)<='Z')) 329 #define IsLower(c) (((c)>='a')&&((c)<='z')) 330 #define IsDigit(c) (((c)>='0')&&((c)<='9')) 331 332 #if _DF1S != 0 /* Code page is DBCS */ 333 334 #ifdef _DF2S /* Two 1st byte areas */ 335 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) 336 #else /* One 1st byte area */ 337 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) 338 #endif 339 340 #ifdef _DS3S /* Three 2nd byte areas */ 341 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) 342 #else /* Two 2nd byte areas */ 343 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) 344 #endif 345 346 #else /* Code page is SBCS */ 347 348 #define IsDBCS1(c) 0 349 #define IsDBCS2(c) 0 350 351 #endif /* _DF1S */ 352 353 354 /* File attribute bits (internal use) */ 355 #define AM_VOL 0x08 /* Volume label */ 356 #define AM_LFN 0x0F /* LFN entry */ 357 #define AM_MASK 0x3F /* Mask of defined bits */ 358 359 360 /* File access control and file status flags (internal use) */ 361 #define FA_SEEKEND 0x20 /* Seek to end of the file on file open */ 362 #define FA_MODIFIED 0x40 /* File has been modified */ 363 #define FA_DIRTY 0x80 /* FIL.buf[] needs to be written-back */ 364 365 366 /* Name status flags */ 367 #define NSFLAG 11 /* Index of name status byte in fn[] */ 368 #define NS_LOSS 0x01 /* Out of 8.3 format */ 369 #define NS_LFN 0x02 /* Force to create LFN entry */ 370 #define NS_LAST 0x04 /* Last segment */ 371 #define NS_BODY 0x08 /* Lower case flag (body) */ 372 #define NS_EXT 0x10 /* Lower case flag (ext) */ 373 #define NS_DOT 0x20 /* Dot entry */ 374 #define NS_NOLFN 0x40 /* Do not find LFN */ 375 #define NS_NONAME 0x80 /* Not followed */ 376 377 378 /* Limits and boundaries (differ from specs but correct for real DOS/Windows) */ 379 #define MAX_FAT12 0xFF5 /* Maximum number of FAT12 clusters */ 380 #define MAX_FAT16 0xFFF5 /* Maximum number of FAT16 clusters */ 381 #define MAX_FAT32 0xFFFFFF5 /* Maximum number of FAT32 clusters */ 382 #define MAX_EXFAT 0x7FFFFFFD /* Maximum number of exFAT clusters (limited by implementation) */ 383 #define MAX_DIR 0x200000 /* Maximum size of FAT directory */ 384 #define MAX_DIR_EX 0x10000000 /* Maximum size of exFAT directory */ 385 386 387 /* FatFs refers the members in the FAT structures as byte array instead of 388 / structure members because the structure is not binary compatible between 389 / different platforms */ 390 391 #define BS_JmpBoot 0 /* x86 jump instruction (3-byte) */ 392 #define BS_OEMName 3 /* OEM name (8-byte) */ 393 #define BPB_BytsPerSec 11 /* Sector size [byte] (WORD) */ 394 #define BPB_SecPerClus 13 /* Cluster size [sector] (BYTE) */ 395 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (WORD) */ 396 #define BPB_NumFATs 16 /* Number of FATs (BYTE) */ 397 #define BPB_RootEntCnt 17 /* Size of root directory area for FAT12/16 [entry] (WORD) */ 398 #define BPB_TotSec16 19 /* Volume size (16-bit) [sector] (WORD) */ 399 #define BPB_Media 21 /* Media descriptor byte (BYTE) */ 400 #define BPB_FATSz16 22 /* FAT size (16-bit) [sector] (WORD) */ 401 #define BPB_SecPerTrk 24 /* Track size for int13h [sector] (WORD) */ 402 #define BPB_NumHeads 26 /* Number of heads for int13h (WORD) */ 403 #define BPB_HiddSec 28 /* Volume offset from top of the drive (DWORD) */ 404 #define BPB_TotSec32 32 /* Volume size (32-bit) [sector] (DWORD) */ 405 #define BS_DrvNum 36 /* Physical drive number for int13h (BYTE) */ 406 #define BS_NTres 37 /* Error flag (BYTE) */ 407 #define BS_BootSig 38 /* Extended boot signature (BYTE) */ 408 #define BS_VolID 39 /* Volume serial number (DWORD) */ 409 #define BS_VolLab 43 /* Volume label string (8-byte) */ 410 #define BS_FilSysType 54 /* File system type string (8-byte) */ 411 #define BS_BootCode 62 /* Boot code (448-byte) */ 412 #define BS_55AA 510 /* Signature word (WORD) */ 413 414 #define BPB_FATSz32 36 /* FAT32: FAT size [sector] (DWORD) */ 415 #define BPB_ExtFlags32 40 /* FAT32: Extended flags (WORD) */ 416 #define BPB_FSVer32 42 /* FAT32: File system version (WORD) */ 417 #define BPB_RootClus32 44 /* FAT32: Root directory cluster (DWORD) */ 418 #define BPB_FSInfo32 48 /* FAT32: Offset of FSINFO sector (WORD) */ 419 #define BPB_BkBootSec32 50 /* FAT32: Offset of backup boot sector (WORD) */ 420 #define BS_DrvNum32 64 /* FAT32: Physical drive number for int13h (BYTE) */ 421 #define BS_NTres32 65 /* FAT32: Error flag (BYTE) */ 422 #define BS_BootSig32 66 /* FAT32: Extended boot signature (BYTE) */ 423 #define BS_VolID32 67 /* FAT32: Volume serial number (DWORD) */ 424 #define BS_VolLab32 71 /* FAT32: Volume label string (8-byte) */ 425 #define BS_FilSysType32 82 /* FAT32: File system type string (8-byte) */ 426 #define BS_BootCode32 90 /* FAT32: Boot code (420-byte) */ 427 428 #define BPB_ZeroedEx 11 /* exFAT: MBZ field (53-byte) */ 429 #define BPB_VolOfsEx 64 /* exFAT: Volume offset from top of the drive [sector] (QWORD) */ 430 #define BPB_TotSecEx 72 /* exFAT: Volume size [sector] (QWORD) */ 431 #define BPB_FatOfsEx 80 /* exFAT: FAT offset from top of the volume [sector] (DWORD) */ 432 #define BPB_FatSzEx 84 /* exFAT: FAT size [sector] (DWORD) */ 433 #define BPB_DataOfsEx 88 /* exFAT: Data offset from top of the volume [sector] (DWORD) */ 434 #define BPB_NumClusEx 92 /* exFAT: Number of clusters (DWORD) */ 435 #define BPB_RootClusEx 96 /* exFAT: Root directory cluster (DWORD) */ 436 #define BPB_VolIDEx 100 /* exFAT: Volume serial number (DWORD) */ 437 #define BPB_FSVerEx 104 /* exFAT: File system version (WORD) */ 438 #define BPB_VolFlagEx 106 /* exFAT: Volume flags (BYTE) */ 439 #define BPB_ActFatEx 107 /* exFAT: Active FAT flags (BYTE) */ 440 #define BPB_BytsPerSecEx 108 /* exFAT: Log2 of sector size in byte (BYTE) */ 441 #define BPB_SecPerClusEx 109 /* exFAT: Log2 of cluster size in sector (BYTE) */ 442 #define BPB_NumFATsEx 110 /* exFAT: Number of FATs (BYTE) */ 443 #define BPB_DrvNumEx 111 /* exFAT: Physical drive number for int13h (BYTE) */ 444 #define BPB_PercInUseEx 112 /* exFAT: Percent in use (BYTE) */ 445 #define BPB_RsvdEx 113 /* exFAT: Reserved (7-byte) */ 446 #define BS_BootCodeEx 120 /* exFAT: Boot code (390-byte) */ 447 448 #define FSI_LeadSig 0 /* FAT32 FSI: Leading signature (DWORD) */ 449 #define FSI_StrucSig 484 /* FAT32 FSI: Structure signature (DWORD) */ 450 #define FSI_Free_Count 488 /* FAT32 FSI: Number of free clusters (DWORD) */ 451 #define FSI_Nxt_Free 492 /* FAT32 FSI: Last allocated cluster (DWORD) */ 452 453 #define MBR_Table 446 /* MBR: Offset of partition table in the MBR */ 454 #define SZ_PTE 16 /* MBR: Size of a partition table entry */ 455 #define PTE_Boot 0 /* MBR PTE: Boot indicator */ 456 #define PTE_StHead 1 /* MBR PTE: Start head */ 457 #define PTE_StSec 2 /* MBR PTE: Start sector */ 458 #define PTE_StCyl 3 /* MBR PTE: Start cylinder */ 459 #define PTE_System 4 /* MBR PTE: System ID */ 460 #define PTE_EdHead 5 /* MBR PTE: End head */ 461 #define PTE_EdSec 6 /* MBR PTE: End sector */ 462 #define PTE_EdCyl 7 /* MBR PTE: End cylinder */ 463 #define PTE_StLba 8 /* MBR PTE: Start in LBA */ 464 #define PTE_SizLba 12 /* MBR PTE: Size in LBA */ 465 466 #define DIR_Name 0 /* Short file name (11-byte) */ 467 #define DIR_Attr 11 /* Attribute (BYTE) */ 468 #define DIR_NTres 12 /* Lower case flag (BYTE) */ 469 #define DIR_CrtTime10 13 /* Created time sub-second (BYTE) */ 470 #define DIR_CrtTime 14 /* Created time (DWORD) */ 471 #define DIR_LstAccDate 18 /* Last accessed date (WORD) */ 472 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (WORD) */ 473 #define DIR_ModTime 22 /* Modified time (DWORD) */ 474 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (WORD) */ 475 #define DIR_FileSize 28 /* File size (DWORD) */ 476 #define LDIR_Ord 0 /* LFN entry order and LLE flag (BYTE) */ 477 #define LDIR_Attr 11 /* LFN attribute (BYTE) */ 478 #define LDIR_Type 12 /* LFN type (BYTE) */ 479 #define LDIR_Chksum 13 /* Checksum of the SFN entry (BYTE) */ 480 #define LDIR_FstClusLO 26 /* Must be zero (WORD) */ 481 #define XDIR_Type 0 /* Type of exFAT directory entry (BYTE) */ 482 #define XDIR_NumLabel 1 /* Number of volume label characters (BYTE) */ 483 #define XDIR_Label 2 /* Volume label (11-WORD) */ 484 #define XDIR_CaseSum 4 /* Sum of case conversion table (DWORD) */ 485 #define XDIR_NumSec 1 /* Number of secondary entries (BYTE) */ 486 #define XDIR_SetSum 2 /* Sum of the set of directory entries (WORD) */ 487 #define XDIR_Attr 4 /* File attribute (WORD) */ 488 #define XDIR_CrtTime 8 /* Created time (DWORD) */ 489 #define XDIR_ModTime 12 /* Modified time (DWORD) */ 490 #define XDIR_AccTime 16 /* Last accessed time (DWORD) */ 491 #define XDIR_CrtTime10 20 /* Created time subsecond (BYTE) */ 492 #define XDIR_ModTime10 21 /* Modified time subsecond (BYTE) */ 493 #define XDIR_CrtTZ 22 /* Created timezone (BYTE) */ 494 #define XDIR_ModTZ 23 /* Modified timezone (BYTE) */ 495 #define XDIR_AccTZ 24 /* Last accessed timezone (BYTE) */ 496 #define XDIR_GenFlags 33 /* Gneral secondary flags (WORD) */ 497 #define XDIR_NumName 35 /* Number of file name characters (BYTE) */ 498 #define XDIR_NameHash 36 /* Hash of file name (WORD) */ 499 #define XDIR_ValidFileSize 40 /* Valid file size (QWORD) */ 500 #define XDIR_FstClus 52 /* First cluster of the file data (DWORD) */ 501 #define XDIR_FileSize 56 /* File/Directory size (QWORD) */ 502 503 #define SZDIRE 32 /* Size of a directory entry */ 504 #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */ 505 #define DDEM 0xE5 /* Deleted directory entry mark set to DIR_Name[0] */ 506 #define RDDEM 0x05 /* Replacement of the character collides with DDEM */ 507 508 509 510 511 512 /*-------------------------------------------------------------------------- 513 514 Module Private Work Area 515 516 ---------------------------------------------------------------------------*/ 517 518 /* Remark: Variables here without initial value shall be guaranteed zero/null 519 / at start-up. If not, either the linker or start-up routine being used is 520 / not compliance with C standard. */ 521 522 #if _VOLUMES < 1 || _VOLUMES > 9 523 #error Wrong _VOLUMES setting 524 #endif 525 static FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */ 526 static WORD Fsid; /* File system mount ID */ 527 528 #if _FS_RPATH != 0 && _VOLUMES >= 2 529 static BYTE CurrVol; /* Current drive */ 530 #endif 531 532 #if _FS_LOCK != 0 533 static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */ 534 #endif 535 536 #if _USE_LFN == 0 /* Non-LFN configuration */ 537 #define DEF_NAMBUF 538 #define INIT_NAMBUF(fs) 539 #define FREE_NAMBUF() 540 #else 541 #if _MAX_LFN < 12 || _MAX_LFN > 255 542 #error Wrong _MAX_LFN setting 543 #endif 544 545 #if _USE_LFN == 1 /* LFN enabled with static working buffer */ 546 #if _FS_EXFAT 547 static BYTE DirBuf[SZDIRE*19]; /* Directory entry block scratchpad buffer (19 entries in size) */ 548 #endif 549 static WCHAR LfnBuf[_MAX_LFN+1]; /* LFN enabled with static working buffer */ 550 #define DEF_NAMBUF 551 #define INIT_NAMBUF(fs) 552 #define FREE_NAMBUF() 553 554 #elif _USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */ 555 #if _FS_EXFAT 556 #define DEF_NAMBUF WCHAR lbuf[_MAX_LFN+1]; BYTE dbuf[SZDIRE*19]; 557 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; } 558 #define FREE_NAMBUF() 559 #else 560 #define DEF_NAMBUF WCHAR lbuf[_MAX_LFN+1]; 561 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; } 562 #define FREE_NAMBUF() 563 #endif 564 565 #elif _USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */ 566 #if _FS_EXFAT 567 #define DEF_NAMBUF WCHAR *lfn; 568 #define INIT_NAMBUF(fs) { lfn = ff_memalloc((_MAX_LFN+1)*2 + SZDIRE*19); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; (fs)->dirbuf = (BYTE*)(lfn+_MAX_LFN+1); } 569 #define FREE_NAMBUF() ff_memfree(lfn) 570 #else 571 #define DEF_NAMBUF WCHAR *lfn; 572 #define INIT_NAMBUF(fs) { lfn = ff_memalloc((_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; } 573 #define FREE_NAMBUF() ff_memfree(lfn) 574 #endif 575 576 #else 577 #error Wrong _USE_LFN setting 578 #endif 579 #endif 580 581 #ifdef _EXCVT 582 static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for SBCS extended characters */ 583 #endif 584 585 586 587 588 589 590 /*-------------------------------------------------------------------------- 591 592 Module Private Functions 593 594 ---------------------------------------------------------------------------*/ 595 596 597 /*-----------------------------------------------------------------------*/ 598 /* Load/Store multi-byte word in the FAT structure */ 599 /*-----------------------------------------------------------------------*/ 600 601 static 602 WORD ld_word (const BYTE* ptr) /* Load a 2-byte little-endian word */ 603 { 604 WORD rv; 605 606 rv = ptr[1]; 607 rv = rv << 8 | ptr[0]; 608 return rv; 609 } 610 611 static 612 DWORD ld_dword (const BYTE* ptr) /* Load a 4-byte little-endian word */ 613 { 614 DWORD rv; 615 616 rv = ptr[3]; 617 rv = rv << 8 | ptr[2]; 618 rv = rv << 8 | ptr[1]; 619 rv = rv << 8 | ptr[0]; 620 return rv; 621 } 622 623 #if _FS_EXFAT 624 static 625 QWORD ld_qword (const BYTE* ptr) /* Load an 8-byte little-endian word */ 626 { 627 QWORD rv; 628 629 rv = ptr[7]; 630 rv = rv << 8 | ptr[6]; 631 rv = rv << 8 | ptr[5]; 632 rv = rv << 8 | ptr[4]; 633 rv = rv << 8 | ptr[3]; 634 rv = rv << 8 | ptr[2]; 635 rv = rv << 8 | ptr[1]; 636 rv = rv << 8 | ptr[0]; 637 return rv; 638 } 639 #endif 640 641 #if !_FS_READONLY 642 static 643 void st_word (BYTE* ptr, WORD val) /* Store a 2-byte word in little-endian */ 644 { 645 *ptr++ = (BYTE)val; val >>= 8; 646 *ptr++ = (BYTE)val; 647 } 648 649 static 650 void st_dword (BYTE* ptr, DWORD val) /* Store a 4-byte word in little-endian */ 651 { 652 *ptr++ = (BYTE)val; val >>= 8; 653 *ptr++ = (BYTE)val; val >>= 8; 654 *ptr++ = (BYTE)val; val >>= 8; 655 *ptr++ = (BYTE)val; 656 } 657 658 #if _FS_EXFAT 659 static 660 void st_qword (BYTE* ptr, QWORD val) /* Store an 8-byte word in little-endian */ 661 { 662 *ptr++ = (BYTE)val; val >>= 8; 663 *ptr++ = (BYTE)val; val >>= 8; 664 *ptr++ = (BYTE)val; val >>= 8; 665 *ptr++ = (BYTE)val; val >>= 8; 666 *ptr++ = (BYTE)val; val >>= 8; 667 *ptr++ = (BYTE)val; val >>= 8; 668 *ptr++ = (BYTE)val; val >>= 8; 669 *ptr++ = (BYTE)val; 670 } 671 #endif 672 #endif /* !_FS_READONLY */ 673 674 675 676 /*-----------------------------------------------------------------------*/ 677 /* String functions */ 678 /*-----------------------------------------------------------------------*/ 679 680 /* Copy memory to memory */ 681 static 682 void mem_cpy (void* dst, const void* src, UINT cnt) { 683 BYTE *d = (BYTE*)dst; 684 const BYTE *s = (const BYTE*)src; 685 686 if (cnt) { 687 do *d++ = *s++; while (--cnt); 688 } 689 } 690 691 /* Fill memory block */ 692 static 693 void mem_set (void* dst, int val, UINT cnt) { 694 BYTE *d = (BYTE*)dst; 695 696 do *d++ = (BYTE)val; while (--cnt); 697 } 698 699 /* Compare memory block */ 700 static 701 int mem_cmp (const void* dst, const void* src, UINT cnt) { /* ZR:same, NZ:different */ 702 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; 703 int r = 0; 704 705 do { 706 r = *d++ - *s++; 707 } while (--cnt && r == 0); 708 709 return r; 710 } 711 712 /* Check if chr is contained in the string */ 713 static 714 int chk_chr (const char* str, int chr) { /* NZ:contained, ZR:not contained */ 715 while (*str && *str != chr) str++; 716 return *str; 717 } 718 719 720 721 722 #if _FS_REENTRANT 723 /*-----------------------------------------------------------------------*/ 724 /* Request/Release grant to access the volume */ 725 /*-----------------------------------------------------------------------*/ 726 static 727 int lock_fs ( 728 FATFS* fs /* File system object */ 729 ) 730 { 731 return ff_req_grant(fs->sobj); 732 } 733 734 735 static 736 void unlock_fs ( 737 FATFS* fs, /* File system object */ 738 FRESULT res /* Result code to be returned */ 739 ) 740 { 741 if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_TIMEOUT) { 742 ff_rel_grant(fs->sobj); 743 } 744 } 745 746 #endif 747 748 749 750 #if _FS_LOCK != 0 751 /*-----------------------------------------------------------------------*/ 752 /* File lock control functions */ 753 /*-----------------------------------------------------------------------*/ 754 755 static 756 FRESULT chk_lock ( /* Check if the file can be accessed */ 757 DIR* dp, /* Directory object pointing the file to be checked */ 758 int acc /* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */ 759 ) 760 { 761 UINT i, be; 762 763 /* Search file semaphore table */ 764 for (i = be = 0; i < _FS_LOCK; i++) { 765 if (Files[i].fs) { /* Existing entry */ 766 if (Files[i].fs == dp->obj.fs && /* Check if the object matched with an open object */ 767 Files[i].clu == dp->obj.sclust && 768 Files[i].ofs == dp->dptr) break; 769 } else { /* Blank entry */ 770 be = 1; 771 } 772 } 773 if (i == _FS_LOCK) { /* The object is not opened */ 774 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */ 775 } 776 777 /* The object has been opened. Reject any open against writing file and all write mode open */ 778 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK; 779 } 780 781 782 static 783 int enq_lock (void) /* Check if an entry is available for a new object */ 784 { 785 UINT i; 786 787 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; 788 return (i == _FS_LOCK) ? 0 : 1; 789 } 790 791 792 static 793 UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */ 794 DIR* dp, /* Directory object pointing the file to register or increment */ 795 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ 796 ) 797 { 798 UINT i; 799 800 801 for (i = 0; i < _FS_LOCK; i++) { /* Find the object */ 802 if (Files[i].fs == dp->obj.fs && 803 Files[i].clu == dp->obj.sclust && 804 Files[i].ofs == dp->dptr) break; 805 } 806 807 if (i == _FS_LOCK) { /* Not opened. Register it as new. */ 808 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; 809 if (i == _FS_LOCK) return 0; /* No free entry to register (int err) */ 810 Files[i].fs = dp->obj.fs; 811 Files[i].clu = dp->obj.sclust; 812 Files[i].ofs = dp->dptr; 813 Files[i].ctr = 0; 814 } 815 816 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */ 817 818 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */ 819 820 return i + 1; 821 } 822 823 824 static 825 FRESULT dec_lock ( /* Decrement object open counter */ 826 UINT i /* Semaphore index (1..) */ 827 ) 828 { 829 WORD n; 830 FRESULT res; 831 832 833 if (--i < _FS_LOCK) { /* Shift index number origin from 0 */ 834 n = Files[i].ctr; 835 if (n == 0x100) n = 0; /* If write mode open, delete the entry */ 836 if (n > 0) n--; /* Decrement read mode open count */ 837 Files[i].ctr = n; 838 if (n == 0) Files[i].fs = 0; /* Delete the entry if open count gets zero */ 839 res = FR_OK; 840 } else { 841 res = FR_INT_ERR; /* Invalid index nunber */ 842 } 843 return res; 844 } 845 846 847 static 848 void clear_lock ( /* Clear lock entries of the volume */ 849 FATFS *fs 850 ) 851 { 852 UINT i; 853 854 for (i = 0; i < _FS_LOCK; i++) { 855 if (Files[i].fs == fs) Files[i].fs = 0; 856 } 857 } 858 859 #endif /* _FS_LOCK != 0 */ 860 861 862 863 /*-----------------------------------------------------------------------*/ 864 /* Move/Flush disk access window in the file system object */ 865 /*-----------------------------------------------------------------------*/ 866 #if !_FS_READONLY 867 static 868 FRESULT sync_window ( /* Returns FR_OK or FR_DISK_ERROR */ 869 FATFS* fs /* File system object */ 870 ) 871 { 872 DWORD wsect; 873 UINT nf; 874 FRESULT res = FR_OK; 875 876 877 if (fs->wflag) { /* Write back the sector if it is dirty */ 878 wsect = fs->winsect; /* Current sector number */ 879 if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) { 880 res = FR_DISK_ERR; 881 } else { 882 fs->wflag = 0; 883 if (wsect - fs->fatbase < fs->fsize) { /* Is it in the FAT area? */ 884 for (nf = fs->n_fats; nf >= 2; nf--) { /* Reflect the change to all FAT copies */ 885 wsect += fs->fsize; 886 disk_write(fs->drv, fs->win, wsect, 1); 887 } 888 } 889 } 890 } 891 return res; 892 } 893 #endif 894 895 896 static 897 FRESULT move_window ( /* Returns FR_OK or FR_DISK_ERROR */ 898 FATFS* fs, /* File system object */ 899 DWORD sector /* Sector number to make appearance in the fs->win[] */ 900 ) 901 { 902 FRESULT res = FR_OK; 903 904 905 if (sector != fs->winsect) { /* Window offset changed? */ 906 #if !_FS_READONLY 907 res = sync_window(fs); /* Write-back changes */ 908 #endif 909 if (res == FR_OK) { /* Fill sector window with new data */ 910 if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) { 911 sector = 0xFFFFFFFF; /* Invalidate window if data is not reliable */ 912 res = FR_DISK_ERR; 913 } 914 fs->winsect = sector; 915 } 916 } 917 return res; 918 } 919 920 921 922 923 #if !_FS_READONLY 924 /*-----------------------------------------------------------------------*/ 925 /* Synchronize file system and strage device */ 926 /*-----------------------------------------------------------------------*/ 927 928 static 929 FRESULT sync_fs ( /* FR_OK:succeeded, !=0:error */ 930 FATFS* fs /* File system object */ 931 ) 932 { 933 FRESULT res; 934 935 936 res = sync_window(fs); 937 if (res == FR_OK) { 938 /* Update FSInfo sector if needed */ 939 if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) { 940 /* Create FSInfo structure */ 941 mem_set(fs->win, 0, SS(fs)); 942 st_word(fs->win + BS_55AA, 0xAA55); 943 st_dword(fs->win + FSI_LeadSig, 0x41615252); 944 st_dword(fs->win + FSI_StrucSig, 0x61417272); 945 st_dword(fs->win + FSI_Free_Count, fs->free_clst); 946 st_dword(fs->win + FSI_Nxt_Free, fs->last_clst); 947 /* Write it into the FSInfo sector */ 948 fs->winsect = fs->volbase + 1; 949 disk_write(fs->drv, fs->win, fs->winsect, 1); 950 fs->fsi_flag = 0; 951 } 952 /* Make sure that no pending write process in the physical drive */ 953 if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK) res = FR_DISK_ERR; 954 } 955 956 return res; 957 } 958 959 #endif 960 961 962 963 /*-----------------------------------------------------------------------*/ 964 /* Get sector# from cluster# */ 965 /*-----------------------------------------------------------------------*/ 966 967 static 968 DWORD clust2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */ 969 FATFS* fs, /* File system object */ 970 DWORD clst /* Cluster# to be converted */ 971 ) 972 { 973 clst -= 2; 974 if (clst >= fs->n_fatent - 2) return 0; /* Invalid cluster# */ 975 return clst * fs->csize + fs->database; 976 } 977 978 979 980 981 /*-----------------------------------------------------------------------*/ 982 /* FAT access - Read value of a FAT entry */ 983 /*-----------------------------------------------------------------------*/ 984 985 static 986 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */ 987 _FDID* obj, /* Corresponding object */ 988 DWORD clst /* Cluster number to get the value */ 989 ) 990 { 991 UINT wc, bc; 992 DWORD val; 993 FATFS *fs = obj->fs; 994 995 996 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */ 997 val = 1; /* Internal error */ 998 999 } else { 1000 val = 0xFFFFFFFF; /* Default value falls on disk error */ 1001 1002 switch (fs->fs_type) { 1003 case FS_FAT12 : 1004 bc = (UINT)clst; bc += bc / 2; 1005 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; 1006 wc = fs->win[bc++ % SS(fs)]; 1007 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; 1008 wc |= fs->win[bc % SS(fs)] << 8; 1009 val = (clst & 1) ? (wc >> 4) : (wc & 0xFFF); 1010 break; 1011 1012 case FS_FAT16 : 1013 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break; 1014 val = ld_word(fs->win + clst * 2 % SS(fs)); 1015 break; 1016 1017 case FS_FAT32 : 1018 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break; 1019 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF; 1020 break; 1021 #if _FS_EXFAT 1022 case FS_EXFAT : 1023 if (obj->objsize) { 1024 DWORD cofs = clst - obj->sclust; /* Offset from start cluster */ 1025 DWORD clen = (DWORD)((obj->objsize - 1) / SS(fs)) / fs->csize; /* Number of clusters - 1 */ 1026 1027 if (obj->stat == 2) { /* Is there no valid chain on the FAT? */ 1028 if (cofs <= clen) { 1029 val = (cofs == clen) ? 0x7FFFFFFF : clst + 1; /* Generate the value */ 1030 break; 1031 } 1032 } 1033 if (obj->stat == 3 && cofs < obj->n_cont) { /* Is it in the contiguous part? */ 1034 val = clst + 1; /* Generate the value */ 1035 break; 1036 } 1037 if (obj->stat != 2) { /* Get value from FAT if FAT chain is valid */ 1038 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break; 1039 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF; 1040 break; 1041 } 1042 } 1043 /* go next */ 1044 #endif 1045 default: 1046 val = 1; /* Internal error */ 1047 } 1048 } 1049 1050 return val; 1051 } 1052 1053 1054 1055 1056 #if !_FS_READONLY 1057 /*-----------------------------------------------------------------------*/ 1058 /* FAT access - Change value of a FAT entry */ 1059 /*-----------------------------------------------------------------------*/ 1060 1061 static 1062 FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */ 1063 FATFS* fs, /* Corresponding file system object */ 1064 DWORD clst, /* FAT index number (cluster number) to be changed */ 1065 DWORD val /* New value to be set to the entry */ 1066 ) 1067 { 1068 UINT bc; 1069 BYTE *p; 1070 FRESULT res = FR_INT_ERR; 1071 1072 1073 if (clst >= 2 && clst < fs->n_fatent) { /* Check if in valid range */ 1074 switch (fs->fs_type) { 1075 case FS_FAT12 : /* Bitfield items */ 1076 bc = (UINT)clst; bc += bc / 2; 1077 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 1078 if (res != FR_OK) break; 1079 p = fs->win + bc++ % SS(fs); 1080 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; 1081 fs->wflag = 1; 1082 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 1083 if (res != FR_OK) break; 1084 p = fs->win + bc % SS(fs); 1085 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); 1086 fs->wflag = 1; 1087 break; 1088 1089 case FS_FAT16 : /* WORD aligned items */ 1090 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); 1091 if (res != FR_OK) break; 1092 st_word(fs->win + clst * 2 % SS(fs), (WORD)val); 1093 fs->wflag = 1; 1094 break; 1095 1096 case FS_FAT32 : /* DWORD aligned items */ 1097 #if _FS_EXFAT 1098 case FS_EXFAT : 1099 #endif 1100 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); 1101 if (res != FR_OK) break; 1102 if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) { 1103 val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000); 1104 } 1105 st_dword(fs->win + clst * 4 % SS(fs), val); 1106 fs->wflag = 1; 1107 break; 1108 } 1109 } 1110 return res; 1111 } 1112 1113 #endif /* !_FS_READONLY */ 1114 1115 1116 1117 1118 #if _FS_EXFAT && !_FS_READONLY 1119 /*-----------------------------------------------------------------------*/ 1120 /* exFAT: Accessing FAT and Allocation Bitmap */ 1121 /*-----------------------------------------------------------------------*/ 1122 1123 /*---------------------------------------------*/ 1124 /* exFAT: Find a contiguous free cluster block */ 1125 /*---------------------------------------------*/ 1126 1127 static 1128 DWORD find_bitmap ( /* 0:No free cluster, 2..:Free cluster found, 0xFFFFFFFF:Disk error */ 1129 FATFS* fs, /* File system object */ 1130 DWORD clst, /* Cluster number to scan from */ 1131 DWORD ncl /* Number of contiguous clusters to find (1..) */ 1132 ) 1133 { 1134 BYTE bm, bv; 1135 UINT i; 1136 DWORD val, scl, ctr; 1137 1138 1139 clst -= 2; /* The first bit in the bitmap corresponds to cluster #2 */ 1140 if (clst >= fs->n_fatent - 2) clst = 0; 1141 scl = val = clst; ctr = 0; 1142 for (;;) { 1143 if (move_window(fs, fs->database + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF; /* (assuming bitmap is located top of the cluster heap) */ 1144 i = val / 8 % SS(fs); bm = 1 << (val % 8); 1145 do { 1146 do { 1147 bv = fs->win[i] & bm; bm <<= 1; /* Get bit value */ 1148 if (++val >= fs->n_fatent - 2) { /* Next cluster (with wrap-around) */ 1149 val = 0; bm = 0; i = 4096; 1150 } 1151 if (!bv) { /* Is it a free cluster? */ 1152 if (++ctr == ncl) return scl + 2; /* Check run length */ 1153 } else { 1154 scl = val; ctr = 0; /* Encountered a live cluster, restart to scan */ 1155 } 1156 if (val == clst) return 0; /* All cluster scanned? */ 1157 } while (bm); 1158 bm = 1; 1159 } while (++i < SS(fs)); 1160 } 1161 } 1162 1163 1164 /*------------------------------------*/ 1165 /* exFAT: Set/Clear a block of bitmap */ 1166 /*------------------------------------*/ 1167 1168 static 1169 FRESULT change_bitmap ( 1170 FATFS* fs, /* File system object */ 1171 DWORD clst, /* Cluster number to change from */ 1172 DWORD ncl, /* Number of clusters to be changed */ 1173 int bv /* bit value to be set (0 or 1) */ 1174 ) 1175 { 1176 BYTE bm; 1177 UINT i; 1178 DWORD sect; 1179 1180 1181 clst -= 2; /* The first bit corresponds to cluster #2 */ 1182 sect = fs->database + clst / 8 / SS(fs); /* Sector address (assuming bitmap is located top of the cluster heap) */ 1183 i = clst / 8 % SS(fs); /* Byte offset in the sector */ 1184 bm = 1 << (clst % 8); /* Bit mask in the byte */ 1185 for (;;) { 1186 if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR; 1187 do { 1188 do { 1189 if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR; /* Is the bit expected value? */ 1190 fs->win[i] ^= bm; /* Flip the bit */ 1191 fs->wflag = 1; 1192 if (--ncl == 0) return FR_OK; /* All bits processed? */ 1193 } while (bm <<= 1); /* Next bit */ 1194 bm = 1; 1195 } while (++i < SS(fs)); /* Next byte */ 1196 i = 0; 1197 } 1198 } 1199 1200 1201 /*---------------------------------------------*/ 1202 /* Complement contiguous part of the FAT chain */ 1203 /*---------------------------------------------*/ 1204 1205 static 1206 FRESULT fill_fat_chain ( 1207 _FDID* obj /* Pointer to the corresponding object */ 1208 ) 1209 { 1210 FRESULT res; 1211 DWORD cl, n; 1212 1213 if (obj->stat == 3) { /* Has the object been changed 'fragmented'? */ 1214 for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) { /* Create cluster chain on the FAT */ 1215 res = put_fat(obj->fs, cl, cl + 1); 1216 if (res != FR_OK) return res; 1217 } 1218 obj->stat = 0; /* Change status 'FAT chain is valid' */ 1219 } 1220 return FR_OK; 1221 } 1222 1223 #endif /* _FS_EXFAT && !_FS_READONLY */ 1224 1225 1226 1227 #if !_FS_READONLY 1228 /*-----------------------------------------------------------------------*/ 1229 /* FAT handling - Remove a cluster chain */ 1230 /*-----------------------------------------------------------------------*/ 1231 static 1232 FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */ 1233 _FDID* obj, /* Corresponding object */ 1234 DWORD clst, /* Cluster to remove a chain from */ 1235 DWORD pclst /* Previous cluster of clst (0:an entire chain) */ 1236 ) 1237 { 1238 FRESULT res = FR_OK; 1239 DWORD nxt; 1240 FATFS *fs = obj->fs; 1241 #if _FS_EXFAT || _USE_TRIM 1242 DWORD scl = clst, ecl = clst; 1243 #endif 1244 #if _USE_TRIM 1245 DWORD rt[2]; 1246 #endif 1247 1248 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Check if in valid range */ 1249 1250 /* Mark the previous cluster 'EOC' on the FAT if it exists */ 1251 if (pclst && (!_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) { 1252 res = put_fat(fs, pclst, 0xFFFFFFFF); 1253 if (res != FR_OK) return res; 1254 } 1255 1256 /* Remove the chain */ 1257 do { 1258 nxt = get_fat(obj, clst); /* Get cluster status */ 1259 if (nxt == 0) break; /* Empty cluster? */ 1260 if (nxt == 1) return FR_INT_ERR; /* Internal error? */ 1261 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error? */ 1262 if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) { 1263 res = put_fat(fs, clst, 0); /* Mark the cluster 'free' on the FAT */ 1264 if (res != FR_OK) return res; 1265 } 1266 if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */ 1267 fs->free_clst++; 1268 fs->fsi_flag |= 1; 1269 } 1270 #if _FS_EXFAT || _USE_TRIM 1271 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */ 1272 ecl = nxt; 1273 } else { /* End of contiguous cluster block */ 1274 #if _FS_EXFAT 1275 if (fs->fs_type == FS_EXFAT) { 1276 res = change_bitmap(fs, scl, ecl - scl + 1, 0); /* Mark the cluster block 'free' on the bitmap */ 1277 if (res != FR_OK) return res; 1278 } 1279 #endif 1280 #if _USE_TRIM 1281 rt[0] = clust2sect(fs, scl); /* Start sector */ 1282 rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ 1283 disk_ioctl(fs->drv, CTRL_TRIM, rt); /* Inform device the block can be erased */ 1284 #endif 1285 scl = ecl = nxt; 1286 } 1287 #endif 1288 clst = nxt; /* Next cluster */ 1289 } while (clst < fs->n_fatent); /* Repeat while not the last link */ 1290 1291 #if _FS_EXFAT 1292 if (fs->fs_type == FS_EXFAT) { 1293 if (pclst == 0) { /* Does object have no chain? */ 1294 obj->stat = 0; /* Change the object status 'initial' */ 1295 } else { 1296 if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) { /* Did the chain got contiguous? */ 1297 obj->stat = 2; /* Change the object status 'contiguous' */ 1298 } 1299 } 1300 } 1301 #endif 1302 return FR_OK; 1303 } 1304 1305 1306 1307 1308 /*-----------------------------------------------------------------------*/ 1309 /* FAT handling - Stretch a chain or Create a new chain */ 1310 /*-----------------------------------------------------------------------*/ 1311 static 1312 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ 1313 _FDID* obj, /* Corresponding object */ 1314 DWORD clst /* Cluster# to stretch, 0:Create a new chain */ 1315 ) 1316 { 1317 DWORD cs, ncl, scl; 1318 FRESULT res; 1319 FATFS *fs = obj->fs; 1320 1321 1322 if (clst == 0) { /* Create a new chain */ 1323 scl = fs->last_clst; /* Get suggested cluster to start from */ 1324 if (scl == 0 || scl >= fs->n_fatent) scl = 1; 1325 } 1326 else { /* Stretch current chain */ 1327 cs = get_fat(obj, clst); /* Check the cluster status */ 1328 if (cs < 2) return 1; /* Invalid value */ 1329 if (cs == 0xFFFFFFFF) return cs; /* A disk error occurred */ 1330 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */ 1331 scl = clst; 1332 } 1333 1334 #if _FS_EXFAT 1335 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 1336 ncl = find_bitmap(fs, scl, 1); /* Find a free cluster */ 1337 if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl; /* No free cluster or hard error? */ 1338 res = change_bitmap(fs, ncl, 1, 1); /* Mark the cluster 'in use' */ 1339 if (res == FR_INT_ERR) return 1; 1340 if (res == FR_DISK_ERR) return 0xFFFFFFFF; 1341 if (clst == 0) { /* Is it a new chain? */ 1342 obj->stat = 2; /* Set status 'contiguous chain' */ 1343 } else { /* This is a stretched chain */ 1344 if (obj->stat == 2 && ncl != scl + 1) { /* Is the chain got fragmented? */ 1345 obj->n_cont = scl - obj->sclust; /* Set size of the contiguous part */ 1346 obj->stat = 3; /* Change status 'just fragmented' */ 1347 } 1348 } 1349 } else 1350 #endif 1351 { /* On the FAT12/16/32 volume */ 1352 ncl = scl; /* Start cluster */ 1353 for (;;) { 1354 ncl++; /* Next cluster */ 1355 if (ncl >= fs->n_fatent) { /* Check wrap-around */ 1356 ncl = 2; 1357 if (ncl > scl) return 0; /* No free cluster */ 1358 } 1359 cs = get_fat(obj, ncl); /* Get the cluster status */ 1360 if (cs == 0) break; /* Found a free cluster */ 1361 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* An error occurred */ 1362 if (ncl == scl) return 0; /* No free cluster */ 1363 } 1364 } 1365 1366 if (_FS_EXFAT && fs->fs_type == FS_EXFAT && obj->stat == 2) { /* Is it a contiguous chain? */ 1367 res = FR_OK; /* FAT does not need to be written */ 1368 } else { 1369 res = put_fat(fs, ncl, 0xFFFFFFFF); /* Mark the new cluster 'EOC' */ 1370 if (res == FR_OK && clst) { 1371 res = put_fat(fs, clst, ncl); /* Link it from the previous one if needed */ 1372 } 1373 } 1374 1375 if (res == FR_OK) { /* Update FSINFO if function succeeded. */ 1376 fs->last_clst = ncl; 1377 if (fs->free_clst < fs->n_fatent - 2) fs->free_clst--; 1378 fs->fsi_flag |= 1; 1379 } else { 1380 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; /* Failed. Create error status */ 1381 } 1382 1383 return ncl; /* Return new cluster number or error status */ 1384 } 1385 1386 #endif /* !_FS_READONLY */ 1387 1388 1389 1390 1391 #if _USE_FASTSEEK 1392 /*-----------------------------------------------------------------------*/ 1393 /* FAT handling - Convert offset into cluster with link map table */ 1394 /*-----------------------------------------------------------------------*/ 1395 1396 static 1397 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ 1398 FIL* fp, /* Pointer to the file object */ 1399 FSIZE_t ofs /* File offset to be converted to cluster# */ 1400 ) 1401 { 1402 DWORD cl, ncl, *tbl; 1403 FATFS *fs = fp->obj.fs; 1404 1405 1406 tbl = fp->cltbl + 1; /* Top of CLMT */ 1407 cl = (DWORD)(ofs / SS(fs) / fs->csize); /* Cluster order from top of the file */ 1408 for (;;) { 1409 ncl = *tbl++; /* Number of cluters in the fragment */ 1410 if (ncl == 0) return 0; /* End of table? (error) */ 1411 if (cl < ncl) break; /* In this fragment? */ 1412 cl -= ncl; tbl++; /* Next fragment */ 1413 } 1414 return cl + *tbl; /* Return the cluster number */ 1415 } 1416 1417 #endif /* _USE_FASTSEEK */ 1418 1419 1420 1421 1422 /*-----------------------------------------------------------------------*/ 1423 /* Directory handling - Set directory index */ 1424 /*-----------------------------------------------------------------------*/ 1425 1426 static 1427 FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */ 1428 DIR* dp, /* Pointer to directory object */ 1429 DWORD ofs /* Offset of directory table */ 1430 ) 1431 { 1432 DWORD csz, clst; 1433 FATFS *fs = dp->obj.fs; 1434 1435 1436 if (ofs >= (DWORD)((_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) { /* Check range of offset and alignment */ 1437 return FR_INT_ERR; 1438 } 1439 dp->dptr = ofs; /* Set current offset */ 1440 clst = dp->obj.sclust; /* Table start cluster (0:root) */ 1441 if (clst == 0 && fs->fs_type >= FS_FAT32) { /* Replace cluster# 0 with root cluster# */ 1442 clst = fs->dirbase; 1443 if (_FS_EXFAT) dp->obj.stat = 0; /* exFAT: Root dir has an FAT chain */ 1444 } 1445 1446 if (clst == 0) { /* Static table (root-directory in FAT12/16) */ 1447 if (ofs / SZDIRE >= fs->n_rootdir) return FR_INT_ERR; /* Is index out of range? */ 1448 dp->sect = fs->dirbase; 1449 1450 } else { /* Dynamic table (sub-directory or root-directory in FAT32+) */ 1451 csz = (DWORD)fs->csize * SS(fs); /* Bytes per cluster */ 1452 while (ofs >= csz) { /* Follow cluster chain */ 1453 clst = get_fat(&dp->obj, clst); /* Get next cluster */ 1454 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 1455 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Reached to end of table or internal error */ 1456 ofs -= csz; 1457 } 1458 dp->sect = clust2sect(fs, clst); 1459 } 1460 dp->clust = clst; /* Current cluster# */ 1461 if (!dp->sect) return FR_INT_ERR; 1462 dp->sect += ofs / SS(fs); /* Sector# of the directory entry */ 1463 dp->dir = fs->win + (ofs % SS(fs)); /* Pointer to the entry in the win[] */ 1464 1465 return FR_OK; 1466 } 1467 1468 1469 1470 1471 /*-----------------------------------------------------------------------*/ 1472 /* Directory handling - Move directory table index next */ 1473 /*-----------------------------------------------------------------------*/ 1474 1475 static 1476 FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */ 1477 DIR* dp, /* Pointer to the directory object */ 1478 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ 1479 ) 1480 { 1481 DWORD ofs, clst; 1482 FATFS *fs = dp->obj.fs; 1483 #if !_FS_READONLY 1484 UINT n; 1485 #endif 1486 1487 ofs = dp->dptr + SZDIRE; /* Next entry */ 1488 if (!dp->sect || ofs >= (DWORD)((_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR)) return FR_NO_FILE; /* Report EOT when offset has reached max value */ 1489 1490 if (ofs % SS(fs) == 0) { /* Sector changed? */ 1491 dp->sect++; /* Next sector */ 1492 1493 if (!dp->clust) { /* Static table */ 1494 if (ofs / SZDIRE >= fs->n_rootdir) { /* Report EOT if it reached end of static table */ 1495 dp->sect = 0; return FR_NO_FILE; 1496 } 1497 } 1498 else { /* Dynamic table */ 1499 if ((ofs / SS(fs) & (fs->csize - 1)) == 0) { /* Cluster changed? */ 1500 clst = get_fat(&dp->obj, dp->clust); /* Get next cluster */ 1501 if (clst <= 1) return FR_INT_ERR; /* Internal error */ 1502 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 1503 if (clst >= fs->n_fatent) { /* Reached end of dynamic table */ 1504 #if !_FS_READONLY 1505 if (!stretch) { /* If no stretch, report EOT */ 1506 dp->sect = 0; return FR_NO_FILE; 1507 } 1508 clst = create_chain(&dp->obj, dp->clust); /* Allocate a cluster */ 1509 if (clst == 0) return FR_DENIED; /* No free cluster */ 1510 if (clst == 1) return FR_INT_ERR; /* Internal error */ 1511 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 1512 /* Clean-up the stretched table */ 1513 if (_FS_EXFAT) dp->obj.stat |= 4; /* The directory needs to be updated */ 1514 if (sync_window(fs) != FR_OK) return FR_DISK_ERR; /* Flush disk access window */ 1515 mem_set(fs->win, 0, SS(fs)); /* Clear window buffer */ 1516 for (n = 0, fs->winsect = clust2sect(fs, clst); n < fs->csize; n++, fs->winsect++) { /* Fill the new cluster with 0 */ 1517 fs->wflag = 1; 1518 if (sync_window(fs) != FR_OK) return FR_DISK_ERR; 1519 } 1520 fs->winsect -= n; /* Restore window offset */ 1521 #else 1522 if (!stretch) dp->sect = 0; /* If no stretch, report EOT (this is to suppress warning) */ 1523 dp->sect = 0; return FR_NO_FILE; /* Report EOT */ 1524 #endif 1525 } 1526 dp->clust = clst; /* Initialize data for new cluster */ 1527 dp->sect = clust2sect(fs, clst); 1528 } 1529 } 1530 } 1531 dp->dptr = ofs; /* Current entry */ 1532 dp->dir = fs->win + ofs % SS(fs); /* Pointer to the entry in the win[] */ 1533 1534 return FR_OK; 1535 } 1536 1537 1538 1539 1540 #if !_FS_READONLY 1541 /*-----------------------------------------------------------------------*/ 1542 /* Directory handling - Reserve a block of directory entries */ 1543 /*-----------------------------------------------------------------------*/ 1544 1545 static 1546 FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */ 1547 DIR* dp, /* Pointer to the directory object */ 1548 UINT nent /* Number of contiguous entries to allocate */ 1549 ) 1550 { 1551 FRESULT res; 1552 UINT n; 1553 FATFS *fs = dp->obj.fs; 1554 1555 1556 res = dir_sdi(dp, 0); 1557 if (res == FR_OK) { 1558 n = 0; 1559 do { 1560 res = move_window(fs, dp->sect); 1561 if (res != FR_OK) break; 1562 #if _FS_EXFAT 1563 if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) { 1564 #else 1565 if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) { 1566 #endif 1567 if (++n == nent) break; /* A block of contiguous free entries is found */ 1568 } else { 1569 n = 0; /* Not a blank entry. Restart to search */ 1570 } 1571 res = dir_next(dp, 1); 1572 } while (res == FR_OK); /* Next entry with table stretch enabled */ 1573 } 1574 1575 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */ 1576 return res; 1577 } 1578 1579 #endif /* !_FS_READONLY */ 1580 1581 1582 1583 1584 /*-----------------------------------------------------------------------*/ 1585 /* FAT: Directory handling - Load/Store start cluster number */ 1586 /*-----------------------------------------------------------------------*/ 1587 1588 static 1589 DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */ 1590 FATFS* fs, /* Pointer to the fs object */ 1591 const BYTE* dir /* Pointer to the key entry */ 1592 ) 1593 { 1594 DWORD cl; 1595 1596 cl = ld_word(dir + DIR_FstClusLO); 1597 if (fs->fs_type == FS_FAT32) { 1598 cl |= (DWORD)ld_word(dir + DIR_FstClusHI) << 16; 1599 } 1600 1601 return cl; 1602 } 1603 1604 1605 #if !_FS_READONLY 1606 static 1607 void st_clust ( 1608 FATFS* fs, /* Pointer to the fs object */ 1609 BYTE* dir, /* Pointer to the key entry */ 1610 DWORD cl /* Value to be set */ 1611 ) 1612 { 1613 st_word(dir + DIR_FstClusLO, (WORD)cl); 1614 if (fs->fs_type == FS_FAT32) { 1615 st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16)); 1616 } 1617 } 1618 #endif 1619 1620 1621 1622 #if _USE_LFN != 0 1623 /*------------------------------------------------------------------------*/ 1624 /* FAT-LFN: LFN handling */ 1625 /*------------------------------------------------------------------------*/ 1626 static 1627 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN characters in the directory entry */ 1628 1629 1630 /*--------------------------------------------------------*/ 1631 /* FAT-LFN: Compare a part of file name with an LFN entry */ 1632 /*--------------------------------------------------------*/ 1633 static 1634 int cmp_lfn ( /* 1:matched, 0:not matched */ 1635 const WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */ 1636 BYTE* dir /* Pointer to the directory entry containing the part of LFN */ 1637 ) 1638 { 1639 UINT i, s; 1640 WCHAR wc, uc; 1641 1642 1643 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */ 1644 1645 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 1646 1647 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ 1648 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */ 1649 if (wc) { 1650 if (i >= _MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) { /* Compare it */ 1651 return 0; /* Not matched */ 1652 } 1653 wc = uc; 1654 } else { 1655 if (uc != 0xFFFF) return 0; /* Check filler */ 1656 } 1657 } 1658 1659 if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) return 0; /* Last segment matched but different length */ 1660 1661 return 1; /* The part of LFN matched */ 1662 } 1663 1664 1665 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 || _USE_LABEL || _FS_EXFAT 1666 /*-----------------------------------------------------*/ 1667 /* FAT-LFN: Pick a part of file name from an LFN entry */ 1668 /*-----------------------------------------------------*/ 1669 static 1670 int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */ 1671 WCHAR* lfnbuf, /* Pointer to the LFN working buffer */ 1672 BYTE* dir /* Pointer to the LFN entry */ 1673 ) 1674 { 1675 UINT i, s; 1676 WCHAR wc, uc; 1677 1678 1679 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */ 1680 1681 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 1682 1683 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ 1684 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */ 1685 if (wc) { 1686 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 1687 lfnbuf[i++] = wc = uc; /* Store it */ 1688 } else { 1689 if (uc != 0xFFFF) return 0; /* Check filler */ 1690 } 1691 } 1692 1693 if (dir[LDIR_Ord] & LLEF) { /* Put terminator if it is the last LFN part */ 1694 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 1695 lfnbuf[i] = 0; 1696 } 1697 1698 return 1; /* The part of LFN is valid */ 1699 } 1700 #endif 1701 1702 1703 #if !_FS_READONLY 1704 /*-----------------------------------------*/ 1705 /* FAT-LFN: Create an entry of LFN entries */ 1706 /*-----------------------------------------*/ 1707 static 1708 void put_lfn ( 1709 const WCHAR* lfn, /* Pointer to the LFN */ 1710 BYTE* dir, /* Pointer to the LFN entry to be created */ 1711 BYTE ord, /* LFN order (1-20) */ 1712 BYTE sum /* Checksum of the corresponding SFN */ 1713 ) 1714 { 1715 UINT i, s; 1716 WCHAR wc; 1717 1718 1719 dir[LDIR_Chksum] = sum; /* Set checksum */ 1720 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ 1721 dir[LDIR_Type] = 0; 1722 st_word(dir + LDIR_FstClusLO, 0); 1723 1724 i = (ord - 1) * 13; /* Get offset in the LFN working buffer */ 1725 s = wc = 0; 1726 do { 1727 if (wc != 0xFFFF) wc = lfn[i++]; /* Get an effective character */ 1728 st_word(dir + LfnOfs[s], wc); /* Put it */ 1729 if (wc == 0) wc = 0xFFFF; /* Padding characters for left locations */ 1730 } while (++s < 13); 1731 if (wc == 0xFFFF || !lfn[i]) ord |= LLEF; /* Last LFN part is the start of LFN sequence */ 1732 dir[LDIR_Ord] = ord; /* Set the LFN order */ 1733 } 1734 1735 #endif /* !_FS_READONLY */ 1736 #endif /* _USE_LFN != 0 */ 1737 1738 1739 1740 #if _USE_LFN != 0 && !_FS_READONLY 1741 /*-----------------------------------------------------------------------*/ 1742 /* FAT-LFN: Create a Numbered SFN */ 1743 /*-----------------------------------------------------------------------*/ 1744 1745 static 1746 void gen_numname ( 1747 BYTE* dst, /* Pointer to the buffer to store numbered SFN */ 1748 const BYTE* src, /* Pointer to SFN */ 1749 const WCHAR* lfn, /* Pointer to LFN */ 1750 UINT seq /* Sequence number */ 1751 ) 1752 { 1753 BYTE ns[8], c; 1754 UINT i, j; 1755 WCHAR wc; 1756 DWORD sr; 1757 1758 1759 mem_cpy(dst, src, 11); 1760 1761 if (seq > 5) { /* In case of many collisions, generate a hash number instead of sequential number */ 1762 sr = seq; 1763 while (*lfn) { /* Create a CRC */ 1764 wc = *lfn++; 1765 for (i = 0; i < 16; i++) { 1766 sr = (sr << 1) + (wc & 1); 1767 wc >>= 1; 1768 if (sr & 0x10000) sr ^= 0x11021; 1769 } 1770 } 1771 seq = (UINT)sr; 1772 } 1773 1774 /* itoa (hexdecimal) */ 1775 i = 7; 1776 do { 1777 c = (BYTE)((seq % 16) + '0'); 1778 if (c > '9') c += 7; 1779 ns[i--] = c; 1780 seq /= 16; 1781 } while (seq); 1782 ns[i] = '~'; 1783 1784 /* Append the number */ 1785 for (j = 0; j < i && dst[j] != ' '; j++) { 1786 if (IsDBCS1(dst[j])) { 1787 if (j == i - 1) break; 1788 j++; 1789 } 1790 } 1791 do { 1792 dst[j++] = (i < 8) ? ns[i++] : ' '; 1793 } while (j < 8); 1794 } 1795 #endif /* _USE_LFN != 0 && !_FS_READONLY */ 1796 1797 1798 1799 #if _USE_LFN != 0 1800 /*-----------------------------------------------------------------------*/ 1801 /* FAT-LFN: Calculate checksum of an SFN entry */ 1802 /*-----------------------------------------------------------------------*/ 1803 1804 static 1805 BYTE sum_sfn ( 1806 const BYTE* dir /* Pointer to the SFN entry */ 1807 ) 1808 { 1809 BYTE sum = 0; 1810 UINT n = 11; 1811 1812 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n); 1813 return sum; 1814 } 1815 1816 #endif /* _USE_LFN != 0 */ 1817 1818 1819 1820 #if _FS_EXFAT 1821 /*-----------------------------------------------------------------------*/ 1822 /* exFAT: Checksum */ 1823 /*-----------------------------------------------------------------------*/ 1824 1825 static 1826 WORD xdir_sum ( /* Get checksum of the directoly block */ 1827 const BYTE* dir /* Directory entry block to be calculated */ 1828 ) 1829 { 1830 UINT i, szblk; 1831 WORD sum; 1832 1833 1834 szblk = (dir[XDIR_NumSec] + 1) * SZDIRE; 1835 for (i = sum = 0; i < szblk; i++) { 1836 if (i == XDIR_SetSum) { /* Skip sum field */ 1837 i++; 1838 } else { 1839 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i]; 1840 } 1841 } 1842 return sum; 1843 } 1844 1845 1846 1847 static 1848 WORD xname_sum ( /* Get check sum (to be used as hash) of the name */ 1849 const WCHAR* name /* File name to be calculated */ 1850 ) 1851 { 1852 WCHAR chr; 1853 WORD sum = 0; 1854 1855 1856 while ((chr = *name++) != 0) { 1857 chr = ff_wtoupper(chr); /* File name needs to be ignored case */ 1858 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF); 1859 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8); 1860 } 1861 return sum; 1862 } 1863 1864 1865 #if !_FS_READONLY && _USE_MKFS 1866 static 1867 DWORD xsum32 ( 1868 BYTE dat, /* Data to be sumed */ 1869 DWORD sum /* Previous value */ 1870 ) 1871 { 1872 sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat; 1873 return sum; 1874 } 1875 #endif 1876 1877 1878 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 1879 /*------------------------------------------------------*/ 1880 /* exFAT: Get object information from a directory block */ 1881 /*------------------------------------------------------*/ 1882 1883 static 1884 void get_xdir_info ( 1885 BYTE* dirb, /* Pointer to the direcotry entry block 85+C0+C1s */ 1886 FILINFO* fno /* Buffer to store the extracted file information */ 1887 ) 1888 { 1889 UINT di, si; 1890 WCHAR w; 1891 #if !_LFN_UNICODE 1892 UINT nc; 1893 #endif 1894 1895 /* Get file name */ 1896 #if _LFN_UNICODE 1897 if (dirb[XDIR_NumName] <= _MAX_LFN) { 1898 for (si = SZDIRE * 2, di = 0; di < dirb[XDIR_NumName]; si += 2, di++) { 1899 if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */ 1900 w = ld_word(dirb + si); /* Get a character */ 1901 fno->fname[di] = w; /* Store it */ 1902 } 1903 } else { 1904 di = 0; /* Buffer overflow and inaccessible object */ 1905 } 1906 #else 1907 for (si = SZDIRE * 2, di = nc = 0; nc < dirb[XDIR_NumName]; si += 2, nc++) { 1908 if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */ 1909 w = ld_word(dirb + si); /* Get a character */ 1910 w = ff_convert(w, 0); /* Unicode -> OEM */ 1911 if (w == 0) { di = 0; break; } /* Could not be converted and inaccessible object */ 1912 if (_DF1S && w >= 0x100) { /* Put 1st byte if it is a DBC (always false at SBCS cfg) */ 1913 fno->fname[di++] = (char)(w >> 8); 1914 } 1915 if (di >= _MAX_LFN) { di = 0; break; } /* Buffer overflow and inaccessible object */ 1916 fno->fname[di++] = (char)w; 1917 } 1918 #endif 1919 if (di == 0) fno->fname[di++] = '?'; /* Inaccessible object? */ 1920 fno->fname[di] = 0; /* Terminate file name */ 1921 1922 fno->altname[0] = 0; /* No SFN */ 1923 fno->fattrib = dirb[XDIR_Attr]; /* Attribute */ 1924 fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(dirb + XDIR_FileSize); /* Size */ 1925 fno->ftime = ld_word(dirb + XDIR_ModTime + 0); /* Time */ 1926 fno->fdate = ld_word(dirb + XDIR_ModTime + 2); /* Date */ 1927 } 1928 1929 #endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */ 1930 1931 1932 /*-----------------------------------*/ 1933 /* exFAT: Get a directry entry block */ 1934 /*-----------------------------------*/ 1935 1936 static 1937 FRESULT load_xdir ( /* FR_INT_ERR: invalid entry block */ 1938 DIR* dp /* Pointer to the reading direcotry object pointing the 85 entry */ 1939 ) 1940 { 1941 FRESULT res; 1942 UINT i, nent; 1943 BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the on-memory direcotry entry block 85+C0+C1s */ 1944 1945 1946 /* Load 85 entry */ 1947 res = move_window(dp->obj.fs, dp->sect); 1948 if (res != FR_OK) return res; 1949 if (dp->dir[XDIR_Type] != 0x85) return FR_INT_ERR; 1950 mem_cpy(dirb, dp->dir, SZDIRE); 1951 nent = dirb[XDIR_NumSec] + 1; 1952 1953 /* Load C0 entry */ 1954 res = dir_next(dp, 0); 1955 if (res != FR_OK) return res; 1956 res = move_window(dp->obj.fs, dp->sect); 1957 if (res != FR_OK) return res; 1958 if (dp->dir[XDIR_Type] != 0xC0) return FR_INT_ERR; 1959 mem_cpy(dirb + SZDIRE, dp->dir, SZDIRE); 1960 1961 /* Load C1 entries */ 1962 if (nent < 3 || nent > 19) return FR_NO_FILE; 1963 i = SZDIRE * 2; nent *= SZDIRE; 1964 do { 1965 res = dir_next(dp, 0); 1966 if (res != FR_OK) return res; 1967 res = move_window(dp->obj.fs, dp->sect); 1968 if (res != FR_OK) return res; 1969 if (dp->dir[XDIR_Type] != 0xC1) return FR_INT_ERR; 1970 mem_cpy(dirb + i, dp->dir, SZDIRE); 1971 i += SZDIRE; 1972 } while (i < nent); 1973 1974 /* Sanity check */ 1975 if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR; 1976 1977 return FR_OK; 1978 } 1979 1980 1981 #if !_FS_READONLY || _FS_RPATH != 0 1982 /*------------------------------------------------*/ 1983 /* exFAT: Load the object's directory entry block */ 1984 /*------------------------------------------------*/ 1985 static 1986 FRESULT load_obj_dir ( 1987 DIR* dp, /* Blank directory object to be used to access containing direcotry */ 1988 const _FDID* obj /* Object with containing directory information */ 1989 ) 1990 { 1991 FRESULT res; 1992 1993 1994 /* Open object containing directory */ 1995 dp->obj.fs = obj->fs; 1996 dp->obj.sclust = obj->c_scl; 1997 dp->obj.stat = (BYTE)obj->c_size; 1998 dp->obj.objsize = obj->c_size & 0xFFFFFF00; 1999 dp->blk_ofs = obj->c_ofs; 2000 2001 res = dir_sdi(dp, dp->blk_ofs); /* Goto the block location */ 2002 if (res == FR_OK) { 2003 res = load_xdir(dp); /* Load the object's entry block */ 2004 } 2005 return res; 2006 } 2007 #endif 2008 2009 2010 #if !_FS_READONLY 2011 /*-----------------------------------------------*/ 2012 /* exFAT: Store the directory block to the media */ 2013 /*-----------------------------------------------*/ 2014 static 2015 FRESULT store_xdir ( 2016 DIR* dp /* Pointer to the direcotry object */ 2017 ) 2018 { 2019 FRESULT res; 2020 UINT nent; 2021 BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the direcotry entry block 85+C0+C1s */ 2022 2023 /* Create set sum */ 2024 st_word(dirb + XDIR_SetSum, xdir_sum(dirb)); 2025 nent = dirb[XDIR_NumSec] + 1; 2026 2027 /* Store the set of directory to the volume */ 2028 res = dir_sdi(dp, dp->blk_ofs); 2029 while (res == FR_OK) { 2030 res = move_window(dp->obj.fs, dp->sect); 2031 if (res != FR_OK) break; 2032 mem_cpy(dp->dir, dirb, SZDIRE); 2033 dp->obj.fs->wflag = 1; 2034 if (--nent == 0) break; 2035 dirb += SZDIRE; 2036 res = dir_next(dp, 0); 2037 } 2038 return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR; 2039 } 2040 2041 2042 2043 /*-------------------------------------------*/ 2044 /* exFAT: Create a new directory enrty block */ 2045 /*-------------------------------------------*/ 2046 2047 static 2048 void create_xdir ( 2049 BYTE* dirb, /* Pointer to the direcotry entry block buffer */ 2050 const WCHAR* lfn /* Pointer to the nul terminated file name */ 2051 ) 2052 { 2053 UINT i; 2054 BYTE nb, nc; 2055 WCHAR chr; 2056 2057 2058 mem_set(dirb, 0, 2 * SZDIRE); /* Initialize 85+C0 entry */ 2059 dirb[XDIR_Type] = 0x85; 2060 dirb[XDIR_Type + SZDIRE] = 0xC0; 2061 st_word(dirb + XDIR_NameHash, xname_sum(lfn)); /* Set name hash */ 2062 2063 i = SZDIRE * 2; /* C1 offset */ 2064 nc = 0; nb = 1; chr = 1; 2065 do { 2066 dirb[i++] = 0xC1; dirb[i++] = 0; /* Entry type C1 */ 2067 do { /* Fill name field */ 2068 if (chr && (chr = lfn[nc]) != 0) nc++; /* Get a character if exist */ 2069 st_word(dirb + i, chr); i += 2; /* Store it */ 2070 } while (i % SZDIRE); 2071 nb++; 2072 } while (lfn[nc]); /* Fill next entry if any char follows */ 2073 2074 dirb[XDIR_NumName] = nc; /* Set name length */ 2075 dirb[XDIR_NumSec] = nb; /* Set number of C0+C1s */ 2076 } 2077 2078 #endif /* !_FS_READONLY */ 2079 #endif /* _FS_EXFAT */ 2080 2081 2082 2083 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 || _USE_LABEL || _FS_EXFAT 2084 /*-----------------------------------------------------------------------*/ 2085 /* Read an object from the directory */ 2086 /*-----------------------------------------------------------------------*/ 2087 2088 static 2089 FRESULT dir_read ( 2090 DIR* dp, /* Pointer to the directory object */ 2091 int vol /* Filtered by 0:file/directory or 1:volume label */ 2092 ) 2093 { 2094 FRESULT res = FR_NO_FILE; 2095 FATFS *fs = dp->obj.fs; 2096 BYTE a, c; 2097 #if _USE_LFN != 0 2098 BYTE ord = 0xFF, sum = 0xFF; 2099 #endif 2100 2101 while (dp->sect) { 2102 res = move_window(fs, dp->sect); 2103 if (res != FR_OK) break; 2104 c = dp->dir[DIR_Name]; /* Test for the entry type */ 2105 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of the directory */ 2106 #if _FS_EXFAT 2107 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 2108 if (_USE_LABEL && vol) { 2109 if (c == 0x83) break; /* Volume label entry? */ 2110 } else { 2111 if (c == 0x85) { /* Start of the file entry block? */ 2112 dp->blk_ofs = dp->dptr; /* Get location of the block */ 2113 res = load_xdir(dp); /* Load the entry block */ 2114 if (res == FR_OK) { 2115 dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK; /* Get attribute */ 2116 } 2117 break; 2118 } 2119 } 2120 } else 2121 #endif 2122 { /* On the FAT12/16/32 volume */ 2123 dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK; /* Get attribute */ 2124 #if _USE_LFN != 0 /* LFN configuration */ 2125 if (c == DDEM || c == '.' || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */ 2126 ord = 0xFF; 2127 } else { 2128 if (a == AM_LFN) { /* An LFN entry is found */ 2129 if (c & LLEF) { /* Is it start of an LFN sequence? */ 2130 sum = dp->dir[LDIR_Chksum]; 2131 c &= (BYTE)~LLEF; ord = c; 2132 dp->blk_ofs = dp->dptr; 2133 } 2134 /* Check LFN validity and capture it */ 2135 ord = (c == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF; 2136 } else { /* An SFN entry is found */ 2137 if (ord || sum != sum_sfn(dp->dir)) { /* Is there a valid LFN? */ 2138 dp->blk_ofs = 0xFFFFFFFF; /* It has no LFN. */ 2139 } 2140 break; 2141 } 2142 } 2143 #else /* Non LFN configuration */ 2144 if (c != DDEM && c != '.' && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) { /* Is it a valid entry? */ 2145 break; 2146 } 2147 #endif 2148 } 2149 res = dir_next(dp, 0); /* Next entry */ 2150 if (res != FR_OK) break; 2151 } 2152 2153 if (res != FR_OK) dp->sect = 0; /* Terminate the read operation on error or EOT */ 2154 return res; 2155 } 2156 2157 #endif /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */ 2158 2159 2160 2161 /*-----------------------------------------------------------------------*/ 2162 /* Directory handling - Find an object in the directory */ 2163 /*-----------------------------------------------------------------------*/ 2164 2165 static 2166 FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */ 2167 DIR* dp /* Pointer to the directory object with the file name */ 2168 ) 2169 { 2170 FRESULT res; 2171 FATFS *fs = dp->obj.fs; 2172 BYTE c; 2173 #if _USE_LFN != 0 2174 BYTE a, ord, sum; 2175 #endif 2176 2177 res = dir_sdi(dp, 0); /* Rewind directory object */ 2178 if (res != FR_OK) return res; 2179 #if _FS_EXFAT 2180 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 2181 BYTE nc; 2182 UINT di, ni; 2183 WORD hash = xname_sum(fs->lfnbuf); /* Hash value of the name to find */ 2184 2185 while ((res = dir_read(dp, 0)) == FR_OK) { /* Read an item */ 2186 if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue; /* Skip the comparison if hash value mismatched */ 2187 for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) { /* Compare the name */ 2188 if ((di % SZDIRE) == 0) di += 2; 2189 if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break; 2190 } 2191 if (nc == 0 && !fs->lfnbuf[ni]) break; /* Name matched? */ 2192 } 2193 return res; 2194 } 2195 #endif 2196 /* On the FAT12/16/32 volume */ 2197 #if _USE_LFN != 0 2198 ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ 2199 #endif 2200 do { 2201 res = move_window(fs, dp->sect); 2202 if (res != FR_OK) break; 2203 c = dp->dir[DIR_Name]; 2204 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 2205 #if _USE_LFN != 0 /* LFN configuration */ 2206 dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK; 2207 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 2208 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ 2209 } else { 2210 if (a == AM_LFN) { /* An LFN entry is found */ 2211 if (!(dp->fn[NSFLAG] & NS_NOLFN)) { 2212 if (c & LLEF) { /* Is it start of LFN sequence? */ 2213 sum = dp->dir[LDIR_Chksum]; 2214 c &= (BYTE)~LLEF; ord = c; /* LFN start order */ 2215 dp->blk_ofs = dp->dptr; /* Start offset of LFN */ 2216 } 2217 /* Check validity of the LFN entry and compare it with given name */ 2218 ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF; 2219 } 2220 } else { /* An SFN entry is found */ 2221 if (!ord && sum == sum_sfn(dp->dir)) break; /* LFN matched? */ 2222 if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* SFN matched? */ 2223 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ 2224 } 2225 } 2226 #else /* Non LFN configuration */ 2227 dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK; 2228 if (!(dp->dir[DIR_Attr] & AM_VOL) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* Is it a valid entry? */ 2229 #endif 2230 res = dir_next(dp, 0); /* Next entry */ 2231 } while (res == FR_OK); 2232 2233 return res; 2234 } 2235 2236 2237 2238 2239 #if !_FS_READONLY 2240 /*-----------------------------------------------------------------------*/ 2241 /* Register an object to the directory */ 2242 /*-----------------------------------------------------------------------*/ 2243 2244 static 2245 FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */ 2246 DIR* dp /* Target directory with object name to be created */ 2247 ) 2248 { 2249 FRESULT res; 2250 FATFS *fs = dp->obj.fs; 2251 #if _USE_LFN != 0 /* LFN configuration */ 2252 UINT n, nlen, nent; 2253 BYTE sn[12], sum; 2254 2255 2256 if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME; /* Check name validity */ 2257 for (nlen = 0; fs->lfnbuf[nlen]; nlen++) ; /* Get lfn length */ 2258 2259 #if _FS_EXFAT 2260 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 2261 DIR dj; 2262 2263 nent = (nlen + 14) / 15 + 2; /* Number of entries to allocate (85+C0+C1s) */ 2264 res = dir_alloc(dp, nent); /* Allocate entries */ 2265 if (res != FR_OK) return res; 2266 dp->blk_ofs = dp->dptr - SZDIRE * (nent - 1); /* Set block position */ 2267 2268 if (dp->obj.sclust != 0 && (dp->obj.stat & 4)) { /* Has the sub-directory been stretched? */ 2269 dp->obj.stat &= 3; 2270 dp->obj.objsize += (DWORD)fs->csize * SS(fs); /* Increase object size by cluster size */ 2271 res = fill_fat_chain(&dp->obj); /* Complement FAT chain if needed */ 2272 if (res != FR_OK) return res; 2273 res = load_obj_dir(&dj, &dp->obj); 2274 if (res != FR_OK) return res; /* Load the object status */ 2275 st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize); /* Update the allocation status */ 2276 st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize); 2277 fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1; 2278 res = store_xdir(&dj); /* Store the object status */ 2279 if (res != FR_OK) return res; 2280 } 2281 2282 create_xdir(fs->dirbuf, fs->lfnbuf); /* Create on-memory directory block to be written later */ 2283 return FR_OK; 2284 } 2285 #endif 2286 /* On the FAT12/16/32 volume */ 2287 mem_cpy(sn, dp->fn, 12); 2288 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ 2289 dp->fn[NSFLAG] = NS_NOLFN; /* Find only SFN */ 2290 for (n = 1; n < 100; n++) { 2291 gen_numname(dp->fn, sn, fs->lfnbuf, n); /* Generate a numbered name */ 2292 res = dir_find(dp); /* Check if the name collides with existing SFN */ 2293 if (res != FR_OK) break; 2294 } 2295 if (n == 100) return FR_DENIED; /* Abort if too many collisions */ 2296 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ 2297 dp->fn[NSFLAG] = sn[NSFLAG]; 2298 } 2299 2300 /* Create an SFN with/without LFNs. */ 2301 nent = (sn[NSFLAG] & NS_LFN) ? (nlen + 12) / 13 + 1 : 1; /* Number of entries to allocate */ 2302 res = dir_alloc(dp, nent); /* Allocate entries */ 2303 if (res == FR_OK && --nent) { /* Set LFN entry if needed */ 2304 res = dir_sdi(dp, dp->dptr - nent * SZDIRE); 2305 if (res == FR_OK) { 2306 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */ 2307 do { /* Store LFN entries in bottom first */ 2308 res = move_window(fs, dp->sect); 2309 if (res != FR_OK) break; 2310 put_lfn(fs->lfnbuf, dp->dir, (BYTE)nent, sum); 2311 fs->wflag = 1; 2312 res = dir_next(dp, 0); /* Next entry */ 2313 } while (res == FR_OK && --nent); 2314 } 2315 } 2316 2317 #else /* Non LFN configuration */ 2318 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */ 2319 2320 #endif 2321 2322 /* Set SFN entry */ 2323 if (res == FR_OK) { 2324 res = move_window(fs, dp->sect); 2325 if (res == FR_OK) { 2326 mem_set(dp->dir, 0, SZDIRE); /* Clean the entry */ 2327 mem_cpy(dp->dir + DIR_Name, dp->fn, 11); /* Put SFN */ 2328 #if _USE_LFN != 0 2329 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */ 2330 #endif 2331 fs->wflag = 1; 2332 } 2333 } 2334 2335 return res; 2336 } 2337 2338 #endif /* !_FS_READONLY */ 2339 2340 2341 2342 #if !_FS_READONLY && _FS_MINIMIZE == 0 2343 /*-----------------------------------------------------------------------*/ 2344 /* Remove an object from the directory */ 2345 /*-----------------------------------------------------------------------*/ 2346 2347 static 2348 FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */ 2349 DIR* dp /* Directory object pointing the entry to be removed */ 2350 ) 2351 { 2352 FRESULT res; 2353 FATFS *fs = dp->obj.fs; 2354 #if _USE_LFN != 0 /* LFN configuration */ 2355 DWORD last = dp->dptr; 2356 2357 res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs); /* Goto top of the entry block if LFN is exist */ 2358 if (res == FR_OK) { 2359 do { 2360 res = move_window(fs, dp->sect); 2361 if (res != FR_OK) break; 2362 /* Mark an entry 'deleted' */ 2363 if (_FS_EXFAT && fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 2364 dp->dir[XDIR_Type] &= 0x7F; 2365 } else { /* On the FAT12/16/32 volume */ 2366 dp->dir[DIR_Name] = DDEM; 2367 } 2368 fs->wflag = 1; 2369 if (dp->dptr >= last) break; /* If reached last entry then all entries of the object has been deleted. */ 2370 res = dir_next(dp, 0); /* Next entry */ 2371 } while (res == FR_OK); 2372 if (res == FR_NO_FILE) res = FR_INT_ERR; 2373 } 2374 #else /* Non LFN configuration */ 2375 2376 res = move_window(fs, dp->sect); 2377 if (res == FR_OK) { 2378 dp->dir[DIR_Name] = DDEM; 2379 fs->wflag = 1; 2380 } 2381 #endif 2382 2383 return res; 2384 } 2385 2386 #endif /* !_FS_READONLY && _FS_MINIMIZE == 0 */ 2387 2388 2389 2390 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 2391 /*-----------------------------------------------------------------------*/ 2392 /* Get file information from directory entry */ 2393 /*-----------------------------------------------------------------------*/ 2394 2395 static 2396 void get_fileinfo ( /* No return code */ 2397 DIR* dp, /* Pointer to the directory object */ 2398 FILINFO* fno /* Pointer to the file information to be filled */ 2399 ) 2400 { 2401 UINT i, j; 2402 TCHAR c; 2403 DWORD tm; 2404 #if _USE_LFN != 0 2405 WCHAR w, lfv; 2406 FATFS *fs = dp->obj.fs; 2407 #endif 2408 2409 2410 fno->fname[0] = 0; /* Invaidate file info */ 2411 if (!dp->sect) return; /* Exit if read pointer has reached end of directory */ 2412 2413 #if _USE_LFN != 0 /* LFN configuration */ 2414 #if _FS_EXFAT 2415 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 2416 get_xdir_info(fs->dirbuf, fno); 2417 return; 2418 } else 2419 #endif 2420 { /* On the FAT12/16/32 volume */ 2421 if (dp->blk_ofs != 0xFFFFFFFF) { /* Get LFN if available */ 2422 i = j = 0; 2423 while ((w = fs->lfnbuf[j++]) != 0) { /* Get an LFN character */ 2424 #if !_LFN_UNICODE 2425 w = ff_convert(w, 0); /* Unicode -> OEM */ 2426 if (w == 0) { i = 0; break; } /* No LFN if it could not be converted */ 2427 if (_DF1S && w >= 0x100) { /* Put 1st byte if it is a DBC (always false at SBCS cfg) */ 2428 fno->fname[i++] = (char)(w >> 8); 2429 } 2430 #endif 2431 if (i >= _MAX_LFN) { i = 0; break; } /* No LFN if buffer overflow */ 2432 fno->fname[i++] = (TCHAR)w; 2433 } 2434 fno->fname[i] = 0; /* Terminate the LFN */ 2435 } 2436 } 2437 2438 i = j = 0; 2439 lfv = fno->fname[i]; /* LFN is exist if non-zero */ 2440 while (i < 11) { /* Copy name body and extension */ 2441 c = (TCHAR)dp->dir[i++]; 2442 if (c == ' ') continue; /* Skip padding spaces */ 2443 if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */ 2444 if (i == 9) { /* Insert a . if extension is exist */ 2445 if (!lfv) fno->fname[j] = '.'; 2446 fno->altname[j++] = '.'; 2447 } 2448 #if _LFN_UNICODE 2449 if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dp->dir[i])) { 2450 c = c << 8 | dp->dir[i++]; 2451 } 2452 c = ff_convert(c, 1); /* OEM -> Unicode */ 2453 if (!c) c = '?'; 2454 #endif 2455 fno->altname[j] = c; 2456 if (!lfv) { 2457 if (IsUpper(c) && (dp->dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY))) { 2458 c += 0x20; /* To lower */ 2459 } 2460 fno->fname[j] = c; 2461 } 2462 j++; 2463 } 2464 if (!lfv) { 2465 fno->fname[j] = 0; 2466 if (!dp->dir[DIR_NTres]) j = 0; /* Altname is no longer needed if neither LFN nor case info is exist. */ 2467 } 2468 fno->altname[j] = 0; /* Terminate the SFN */ 2469 2470 #else /* Non-LFN configuration */ 2471 i = j = 0; 2472 while (i < 11) { /* Copy name body and extension */ 2473 c = (TCHAR)dp->dir[i++]; 2474 if (c == ' ') continue; /* Skip padding spaces */ 2475 if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */ 2476 if (i == 9) fno->fname[j++] = '.'; /* Insert a . if extension is exist */ 2477 fno->fname[j++] = c; 2478 } 2479 fno->fname[j] = 0; 2480 #endif 2481 2482 fno->fattrib = dp->dir[DIR_Attr]; /* Attribute */ 2483 fno->fsize = ld_dword(dp->dir + DIR_FileSize); /* Size */ 2484 tm = ld_dword(dp->dir + DIR_ModTime); /* Timestamp */ 2485 fno->ftime = (WORD)tm; fno->fdate = (WORD)(tm >> 16); 2486 } 2487 2488 #endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */ 2489 2490 2491 2492 #if _USE_FIND && _FS_MINIMIZE <= 1 2493 /*-----------------------------------------------------------------------*/ 2494 /* Pattern matching */ 2495 /*-----------------------------------------------------------------------*/ 2496 2497 static 2498 WCHAR get_achar ( /* Get a character and advances ptr 1 or 2 */ 2499 const TCHAR** ptr /* Pointer to pointer to the SBCS/DBCS/Unicode string */ 2500 ) 2501 { 2502 #if !_LFN_UNICODE 2503 WCHAR chr; 2504 2505 chr = (BYTE)*(*ptr)++; /* Get a byte */ 2506 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */ 2507 #ifdef _EXCVT 2508 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */ 2509 #else 2510 if (IsDBCS1(chr) && IsDBCS2(**ptr)) { /* Get DBC 2nd byte if needed */ 2511 chr = chr << 8 | (BYTE)*(*ptr)++; 2512 } 2513 #endif 2514 return chr; 2515 #else 2516 return ff_wtoupper(*(*ptr)++); /* Get a word and to upper */ 2517 #endif 2518 } 2519 2520 2521 static 2522 int pattern_matching ( /* 0:not matched, 1:matched */ 2523 const TCHAR* pat, /* Matching pattern */ 2524 const TCHAR* nam, /* String to be tested */ 2525 int skip, /* Number of pre-skip chars (number of ?s) */ 2526 int inf /* Infinite search (* specified) */ 2527 ) 2528 { 2529 const TCHAR *pp, *np; 2530 WCHAR pc, nc; 2531 int nm, nx; 2532 2533 2534 while (skip--) { /* Pre-skip name chars */ 2535 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */ 2536 } 2537 if (!*pat && inf) return 1; /* (short circuit) */ 2538 2539 do { 2540 pp = pat; np = nam; /* Top of pattern and name to match */ 2541 for (;;) { 2542 if (*pp == '?' || *pp == '*') { /* Wildcard? */ 2543 nm = nx = 0; 2544 do { /* Analyze the wildcard chars */ 2545 if (*pp++ == '?') nm++; else nx = 1; 2546 } while (*pp == '?' || *pp == '*'); 2547 if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */ 2548 nc = *np; break; /* Branch mismatched */ 2549 } 2550 pc = get_achar(&pp); /* Get a pattern char */ 2551 nc = get_achar(&np); /* Get a name char */ 2552 if (pc != nc) break; /* Branch mismatched? */ 2553 if (pc == 0) return 1; /* Branch matched? (matched at end of both strings) */ 2554 } 2555 get_achar(&nam); /* nam++ */ 2556 } while (inf && nc); /* Retry until end of name if infinite search is specified */ 2557 2558 return 0; 2559 } 2560 2561 #endif /* _USE_FIND && _FS_MINIMIZE <= 1 */ 2562 2563 2564 2565 /*-----------------------------------------------------------------------*/ 2566 /* Pick a top segment and create the object name in directory form */ 2567 /*-----------------------------------------------------------------------*/ 2568 2569 static 2570 FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */ 2571 DIR* dp, /* Pointer to the directory object */ 2572 const TCHAR** path /* Pointer to pointer to the segment in the path string */ 2573 ) 2574 { 2575 #if _USE_LFN != 0 /* LFN configuration */ 2576 BYTE b, cf; 2577 WCHAR w, *lfn; 2578 UINT i, ni, si, di; 2579 const TCHAR *p; 2580 2581 /* Create LFN in Unicode */ 2582 p = *path; lfn = dp->obj.fs->lfnbuf; si = di = 0; 2583 for (;;) { 2584 w = p[si++]; /* Get a character */ 2585 if (w < ' ') break; /* Break if end of the path name */ 2586 if (w == '/' || w == '\\') { /* Break if a separator is found */ 2587 while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */ 2588 break; 2589 } 2590 if (di >= _MAX_LFN) return FR_INVALID_NAME; /* Reject too long name */ 2591 #if !_LFN_UNICODE 2592 w &= 0xFF; 2593 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ 2594 b = (BYTE)p[si++]; /* Get 2nd byte */ 2595 w = (w << 8) + b; /* Create a DBC */ 2596 if (!IsDBCS2(b)) return FR_INVALID_NAME; /* Reject invalid sequence */ 2597 } 2598 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */ 2599 if (!w) return FR_INVALID_NAME; /* Reject invalid code */ 2600 #endif 2601 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) return FR_INVALID_NAME; /* Reject illegal characters for LFN */ 2602 lfn[di++] = w; /* Store the Unicode character */ 2603 } 2604 *path = &p[si]; /* Return pointer to the next segment */ 2605 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */ 2606 #if _FS_RPATH != 0 2607 if ((di == 1 && lfn[di - 1] == '.') || 2608 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot name? */ 2609 lfn[di] = 0; 2610 for (i = 0; i < 11; i++) /* Create dot name for SFN entry */ 2611 dp->fn[i] = (i < di) ? '.' : ' '; 2612 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */ 2613 return FR_OK; 2614 } 2615 #endif 2616 while (di) { /* Snip off trailing spaces and dots if exist */ 2617 w = lfn[di - 1]; 2618 if (w != ' ' && w != '.') break; 2619 di--; 2620 } 2621 lfn[di] = 0; /* LFN is created */ 2622 if (di == 0) return FR_INVALID_NAME; /* Reject nul name */ 2623 2624 /* Create SFN in directory form */ 2625 mem_set(dp->fn, ' ', 11); 2626 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */ 2627 if (si) cf |= NS_LOSS | NS_LFN; 2628 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */ 2629 2630 i = b = 0; ni = 8; 2631 for (;;) { 2632 w = lfn[si++]; /* Get an LFN character */ 2633 if (!w) break; /* Break on end of the LFN */ 2634 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */ 2635 cf |= NS_LOSS | NS_LFN; continue; 2636 } 2637 2638 if (i >= ni || si == di) { /* Extension or end of SFN */ 2639 if (ni == 11) { /* Long extension */ 2640 cf |= NS_LOSS | NS_LFN; break; 2641 } 2642 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */ 2643 if (si > di) break; /* No extension */ 2644 si = di; i = 8; ni = 11; /* Enter extension section */ 2645 b <<= 2; continue; 2646 } 2647 2648 if (w >= 0x80) { /* Non ASCII character */ 2649 #ifdef _EXCVT 2650 w = ff_convert(w, 0); /* Unicode -> OEM code */ 2651 if (w) w = ExCvt[w - 0x80]; /* Convert extended character to upper (SBCS) */ 2652 #else 2653 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */ 2654 #endif 2655 cf |= NS_LFN; /* Force create LFN entry */ 2656 } 2657 2658 if (_DF1S && w >= 0x100) { /* Is this DBC? (always false at SBCS cfg) */ 2659 if (i >= ni - 1) { 2660 cf |= NS_LOSS | NS_LFN; i = ni; continue; 2661 } 2662 dp->fn[i++] = (BYTE)(w >> 8); 2663 } else { /* SBC */ 2664 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */ 2665 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ 2666 } else { 2667 if (IsUpper(w)) { /* ASCII large capital */ 2668 b |= 2; 2669 } else { 2670 if (IsLower(w)) { /* ASCII small capital */ 2671 b |= 1; w -= 0x20; 2672 } 2673 } 2674 } 2675 } 2676 dp->fn[i++] = (BYTE)w; 2677 } 2678 2679 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */ 2680 2681 if (ni == 8) b <<= 2; 2682 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN; /* Create LFN entry when there are composite capitals */ 2683 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */ 2684 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */ 2685 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */ 2686 } 2687 2688 dp->fn[NSFLAG] = cf; /* SFN is created */ 2689 2690 return FR_OK; 2691 2692 2693 #else /* _USE_LFN != 0 : Non-LFN configuration */ 2694 BYTE c, d, *sfn; 2695 UINT ni, si, i; 2696 const char *p; 2697 2698 /* Create file name in directory form */ 2699 p = *path; sfn = dp->fn; 2700 mem_set(sfn, ' ', 11); 2701 si = i = 0; ni = 8; 2702 #if _FS_RPATH != 0 2703 if (p[si] == '.') { /* Is this a dot entry? */ 2704 for (;;) { 2705 c = (BYTE)p[si++]; 2706 if (c != '.' || si >= 3) break; 2707 sfn[i++] = c; 2708 } 2709 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; 2710 *path = p + si; /* Return pointer to the next segment */ 2711 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of the path */ 2712 return FR_OK; 2713 } 2714 #endif 2715 for (;;) { 2716 c = (BYTE)p[si++]; 2717 if (c <= ' ') break; /* Break if end of the path name */ 2718 if (c == '/' || c == '\\') { /* Break if a separator is found */ 2719 while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */ 2720 break; 2721 } 2722 if (c == '.' || i >= ni) { /* End of body or over size? */ 2723 if (ni == 11 || c != '.') return FR_INVALID_NAME; /* Over size or invalid dot */ 2724 i = 8; ni = 11; /* Goto extension */ 2725 continue; 2726 } 2727 if (c >= 0x80) { /* Extended character? */ 2728 #ifdef _EXCVT 2729 c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */ 2730 #else 2731 #if !_DF1S 2732 return FR_INVALID_NAME; /* Reject extended characters (ASCII only cfg) */ 2733 #endif 2734 #endif 2735 } 2736 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false at SBCS cfg.) */ 2737 d = (BYTE)p[si++]; /* Get 2nd byte */ 2738 if (!IsDBCS2(d) || i >= ni - 1) return FR_INVALID_NAME; /* Reject invalid DBC */ 2739 sfn[i++] = c; 2740 sfn[i++] = d; 2741 } else { /* SBC */ 2742 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) return FR_INVALID_NAME; /* Reject illegal chrs for SFN */ 2743 if (IsLower(c)) c -= 0x20; /* To upper */ 2744 sfn[i++] = c; 2745 } 2746 } 2747 *path = p + si; /* Return pointer to the next segment */ 2748 if (i == 0) return FR_INVALID_NAME; /* Reject nul string */ 2749 2750 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */ 2751 sfn[NSFLAG] = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */ 2752 2753 return FR_OK; 2754 #endif /* _USE_LFN != 0 */ 2755 } 2756 2757 2758 2759 2760 /*-----------------------------------------------------------------------*/ 2761 /* Follow a file path */ 2762 /*-----------------------------------------------------------------------*/ 2763 2764 static 2765 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ 2766 DIR* dp, /* Directory object to return last directory and found object */ 2767 const TCHAR* path /* Full-path string to find a file or directory */ 2768 ) 2769 { 2770 FRESULT res; 2771 BYTE ns; 2772 _FDID *obj = &dp->obj; 2773 FATFS *fs = obj->fs; 2774 2775 2776 #if _FS_RPATH != 0 2777 if (*path != '/' && *path != '\\') { /* Without heading separator */ 2778 obj->sclust = fs->cdir; /* Start from the current directory */ 2779 } else 2780 #endif 2781 { /* With heading separator */ 2782 while (*path == '/' || *path == '\\') path++; /* Strip heading separator */ 2783 obj->sclust = 0; /* Start from the root directory */ 2784 } 2785 #if _FS_EXFAT && _FS_RPATH != 0 2786 if (fs->fs_type == FS_EXFAT && obj->sclust) { /* Retrieve the sub-directory status if needed */ 2787 DIR dj; 2788 2789 obj->c_scl = fs->cdc_scl; 2790 obj->c_size = fs->cdc_size; 2791 obj->c_ofs = fs->cdc_ofs; 2792 res = load_obj_dir(&dj, obj); 2793 if (res != FR_OK) return res; 2794 obj->objsize = ld_dword(fs->dirbuf + XDIR_FileSize); 2795 obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; 2796 } 2797 #endif 2798 2799 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */ 2800 dp->fn[NSFLAG] = NS_NONAME; 2801 res = dir_sdi(dp, 0); 2802 2803 } else { /* Follow path */ 2804 for (;;) { 2805 res = create_name(dp, &path); /* Get a segment name of the path */ 2806 if (res != FR_OK) break; 2807 res = dir_find(dp); /* Find an object with the segment name */ 2808 ns = dp->fn[NSFLAG]; 2809 if (res != FR_OK) { /* Failed to find the object */ 2810 if (res == FR_NO_FILE) { /* Object is not found */ 2811 if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, stay there */ 2812 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */ 2813 dp->fn[NSFLAG] = NS_NONAME; 2814 res = FR_OK; 2815 } else { /* Could not find the object */ 2816 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */ 2817 } 2818 } 2819 break; 2820 } 2821 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */ 2822 /* Get into the sub-directory */ 2823 if (!(obj->attr & AM_DIR)) { /* It is not a sub-directory and cannot follow */ 2824 res = FR_NO_PATH; break; 2825 } 2826 #if _FS_EXFAT 2827 if (fs->fs_type == FS_EXFAT) { 2828 obj->c_scl = obj->sclust; /* Save containing directory information for next dir */ 2829 obj->c_size = ((DWORD)obj->objsize & 0xFFFFFF00) | obj->stat; 2830 obj->c_ofs = dp->blk_ofs; 2831 obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Open next directory */ 2832 obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; 2833 obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize); 2834 } else 2835 #endif 2836 { 2837 obj->sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs)); /* Open next directory */ 2838 } 2839 } 2840 } 2841 2842 return res; 2843 } 2844 2845 2846 2847 2848 /*-----------------------------------------------------------------------*/ 2849 /* Get logical drive number from path name */ 2850 /*-----------------------------------------------------------------------*/ 2851 2852 static 2853 int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */ 2854 const TCHAR** path /* Pointer to pointer to the path name */ 2855 ) 2856 { 2857 const TCHAR *tp, *tt; 2858 UINT i; 2859 int vol = -1; 2860 #if _STR_VOLUME_ID /* Find string drive id */ 2861 static const char* const str[] = {_VOLUME_STRS}; 2862 const char *sp; 2863 char c; 2864 TCHAR tc; 2865 #endif 2866 2867 2868 if (*path) { /* If the pointer is not a null */ 2869 for (tt = *path; (UINT)*tt >= (_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find ':' in the path */ 2870 if (*tt == ':') { /* If a ':' is exist in the path name */ 2871 tp = *path; 2872 i = *tp++ - '0'; 2873 if (i < 10 && tp == tt) { /* Is there a numeric drive id? */ 2874 if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */ 2875 vol = (int)i; 2876 *path = ++tt; 2877 } 2878 } 2879 #if _STR_VOLUME_ID 2880 else { /* No numeric drive number, find string drive id */ 2881 i = 0; tt++; 2882 do { 2883 sp = str[i]; tp = *path; 2884 do { /* Compare a string drive id with path name */ 2885 c = *sp++; tc = *tp++; 2886 if (IsLower(tc)) tc -= 0x20; 2887 } while (c && (TCHAR)c == tc); 2888 } while ((c || tp != tt) && ++i < _VOLUMES); /* Repeat for each id until pattern match */ 2889 if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */ 2890 vol = (int)i; 2891 *path = tt; 2892 } 2893 } 2894 #endif 2895 return vol; 2896 } 2897 #if _FS_RPATH != 0 && _VOLUMES >= 2 2898 vol = CurrVol; /* Current drive */ 2899 #else 2900 vol = 0; /* Drive 0 */ 2901 #endif 2902 } 2903 return vol; 2904 } 2905 2906 2907 2908 2909 /*-----------------------------------------------------------------------*/ 2910 /* Load a sector and check if it is an FAT boot sector */ 2911 /*-----------------------------------------------------------------------*/ 2912 2913 static 2914 BYTE check_fs ( /* 0:FAT, 1:exFAT, 2:Valid BS but not FAT, 3:Not a BS, 4:Disk error */ 2915 FATFS* fs, /* File system object */ 2916 DWORD sect /* Sector# (lba) to check if it is an FAT-VBR or not */ 2917 ) 2918 { 2919 fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */ 2920 if (move_window(fs, sect) != FR_OK) return 4; /* Load boot record */ 2921 2922 if (ld_word(fs->win + BS_55AA) != 0xAA55) return 3; /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */ 2923 2924 if (fs->win[BS_JmpBoot] == 0xE9 || (fs->win[BS_JmpBoot] == 0xEB && fs->win[BS_JmpBoot + 2] == 0x90)) { 2925 if ((ld_dword(fs->win + BS_FilSysType) & 0xFFFFFF) == 0x544146) return 0; /* Check "FAT" string */ 2926 if (ld_dword(fs->win + BS_FilSysType32) == 0x33544146) return 0; /* Check "FAT3" string */ 2927 } 2928 #if _FS_EXFAT 2929 if (!mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11)) return 1; 2930 #endif 2931 return 2; 2932 } 2933 2934 2935 2936 2937 /*-----------------------------------------------------------------------*/ 2938 /* Find logical drive and check if the volume is mounted */ 2939 /*-----------------------------------------------------------------------*/ 2940 2941 static 2942 FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */ 2943 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */ 2944 FATFS** rfs, /* Pointer to pointer to the found file system object */ 2945 BYTE mode /* !=0: Check write protection for write access */ 2946 ) 2947 { 2948 BYTE fmt, *pt; 2949 int vol; 2950 DSTATUS stat; 2951 DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4]; 2952 WORD nrsv; 2953 FATFS *fs; 2954 UINT i; 2955 2956 2957 /* Get logical drive number */ 2958 *rfs = 0; 2959 vol = get_ldnumber(path); 2960 if (vol < 0) return FR_INVALID_DRIVE; 2961 2962 /* Check if the file system object is valid or not */ 2963 fs = FatFs[vol]; /* Get pointer to the file system object */ 2964 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */ 2965 2966 ENTER_FF(fs); /* Lock the volume */ 2967 *rfs = fs; /* Return pointer to the file system object */ 2968 2969 mode &= (BYTE)~FA_READ; /* Desired access mode, write access or not */ 2970 if (fs->fs_type) { /* If the volume has been mounted */ 2971 stat = disk_status(fs->drv); 2972 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */ 2973 if (!_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check write protection if needed */ 2974 return FR_WRITE_PROTECTED; 2975 } 2976 return FR_OK; /* The file system object is valid */ 2977 } 2978 } 2979 2980 /* The file system object is not valid. */ 2981 /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */ 2982 2983 fs->fs_type = 0; /* Clear the file system object */ 2984 fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */ 2985 stat = disk_initialize(fs->drv); /* Initialize the physical drive */ 2986 if (stat & STA_NOINIT) { /* Check if the initialization succeeded */ 2987 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */ 2988 } 2989 if (!_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check disk write protection if needed */ 2990 return FR_WRITE_PROTECTED; 2991 } 2992 #if _MAX_SS != _MIN_SS /* Get sector size (multiple sector size cfg only) */ 2993 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) return FR_DISK_ERR; 2994 if (SS(fs) > _MAX_SS || SS(fs) < _MIN_SS || (SS(fs) & (SS(fs) - 1))) return FR_DISK_ERR; 2995 #endif 2996 /* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */ 2997 bsect = 0; 2998 fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT-VBR as SFD */ 2999 if (fmt == 2 || (fmt < 2 && LD2PT(vol) != 0)) { /* Not an FAT-VBR or forced partition number */ 3000 for (i = 0; i < 4; i++) { /* Get partition offset */ 3001 pt = fs->win + (MBR_Table + i * SZ_PTE); 3002 br[i] = pt[PTE_System] ? ld_dword(pt + PTE_StLba) : 0; 3003 } 3004 i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */ 3005 if (i) i--; 3006 do { /* Find an FAT volume */ 3007 bsect = br[i]; 3008 fmt = bsect ? check_fs(fs, bsect) : 3; /* Check the partition */ 3009 } while (!LD2PT(vol) && fmt >= 2 && ++i < 4); 3010 } 3011 if (fmt == 4) return FR_DISK_ERR; /* An error occured in the disk I/O layer */ 3012 if (fmt >= 2) return FR_NO_FILESYSTEM; /* No FAT volume is found */ 3013 3014 /* An FAT volume is found. Following code initializes the file system object */ 3015 3016 #if _FS_EXFAT 3017 if (fmt == 1) { 3018 QWORD maxlba; 3019 3020 for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ; /* Check zero filler */ 3021 if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM; 3022 3023 if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM; /* Check exFAT revision (Must be 1.0) */ 3024 3025 if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs)) /* (BPB_BytsPerSecEx must be equal to the physical sector size) */ 3026 return FR_NO_FILESYSTEM; 3027 3028 maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect; /* Last LBA + 1 of the volume */ 3029 if (maxlba >= 0x100000000) return FR_NO_FILESYSTEM; /* (It cannot be handled in 32-bit LBA) */ 3030 3031 fs->fsize = ld_dword(fs->win + BPB_FatSzEx); /* Number of sectors per FAT */ 3032 3033 fs->n_fats = fs->win[BPB_NumFATsEx]; /* Number of FATs */ 3034 if (fs->n_fats != 1) return FR_NO_FILESYSTEM; /* (Supports only 1 FAT) */ 3035 3036 fs->csize = 1 << fs->win[BPB_SecPerClusEx]; /* Cluster size */ 3037 if (fs->csize == 0) return FR_NO_FILESYSTEM; /* (Must be 1..32768) */ 3038 3039 nclst = ld_dword(fs->win + BPB_NumClusEx); /* Number of clusters */ 3040 if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM; /* (Too many clusters) */ 3041 fs->n_fatent = nclst + 2; 3042 3043 /* Boundaries and Limits */ 3044 fs->volbase = bsect; 3045 fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx); 3046 fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx); 3047 if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM; /* (Volume size must not be smaller than the size requiered) */ 3048 fs->dirbase = ld_dword(fs->win + BPB_RootClusEx); 3049 3050 /* Check if bitmap location is in assumption (at the first cluster) */ 3051 if (move_window(fs, clust2sect(fs, fs->dirbase)) != FR_OK) return FR_DISK_ERR; 3052 for (i = 0; i < SS(fs); i += SZDIRE) { 3053 if (fs->win[i] == 0x81 && ld_dword(fs->win + i + 20) == 2) break; /* 81 entry with cluster #2? */ 3054 } 3055 if (i == SS(fs)) return FR_NO_FILESYSTEM; 3056 #if !_FS_READONLY 3057 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */ 3058 #endif 3059 fmt = FS_EXFAT; /* FAT sub-type */ 3060 } else 3061 #endif /* _FS_EXFAT */ 3062 { 3063 if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_BytsPerSec must be equal to the physical sector size) */ 3064 3065 fasize = ld_word(fs->win + BPB_FATSz16); /* Number of sectors per FAT */ 3066 if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32); 3067 fs->fsize = fasize; 3068 3069 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FATs */ 3070 if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */ 3071 fasize *= fs->n_fats; /* Number of sectors for FAT area */ 3072 3073 fs->csize = fs->win[BPB_SecPerClus]; /* Cluster size */ 3074 if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */ 3075 3076 fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt); /* Number of root directory entries */ 3077 if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM; /* (Must be sector aligned) */ 3078 3079 tsect = ld_word(fs->win + BPB_TotSec16); /* Number of sectors on the volume */ 3080 if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32); 3081 3082 nrsv = ld_word(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */ 3083 if (nrsv == 0) return FR_NO_FILESYSTEM; /* (Must not be 0) */ 3084 3085 /* Determine the FAT sub type */ 3086 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE); /* RSV + FAT + DIR */ 3087 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 3088 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ 3089 if (nclst == 0) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 3090 fmt = FS_FAT32; 3091 if (nclst <= MAX_FAT16) fmt = FS_FAT16; 3092 if (nclst <= MAX_FAT12) fmt = FS_FAT12; 3093 3094 /* Boundaries and Limits */ 3095 fs->n_fatent = nclst + 2; /* Number of FAT entries */ 3096 fs->volbase = bsect; /* Volume start sector */ 3097 fs->fatbase = bsect + nrsv; /* FAT start sector */ 3098 fs->database = bsect + sysect; /* Data start sector */ 3099 if (fmt == FS_FAT32) { 3100 if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM; /* (Must be FAT32 revision 0.0) */ 3101 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ 3102 fs->dirbase = ld_dword(fs->win + BPB_RootClus32); /* Root directory start cluster */ 3103 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */ 3104 } else { 3105 if (fs->n_rootdir == 0) return FR_NO_FILESYSTEM;/* (BPB_RootEntCnt must not be 0) */ 3106 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ 3107 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */ 3108 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); 3109 } 3110 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_FATSz must not be less than the size needed) */ 3111 3112 #if !_FS_READONLY 3113 /* Get FSINFO if available */ 3114 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */ 3115 fs->fsi_flag = 0x80; 3116 #if (_FS_NOFSINFO & 3) != 3 3117 if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo32 == 1 */ 3118 && ld_word(fs->win + BPB_FSInfo32) == 1 3119 && move_window(fs, bsect + 1) == FR_OK) 3120 { 3121 fs->fsi_flag = 0; 3122 if (ld_word(fs->win + BS_55AA) == 0xAA55 /* Load FSINFO data if available */ 3123 && ld_dword(fs->win + FSI_LeadSig) == 0x41615252 3124 && ld_dword(fs->win + FSI_StrucSig) == 0x61417272) 3125 { 3126 #if (_FS_NOFSINFO & 1) == 0 3127 fs->free_clst = ld_dword(fs->win + FSI_Free_Count); 3128 #endif 3129 #if (_FS_NOFSINFO & 2) == 0 3130 fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free); 3131 #endif 3132 } 3133 } 3134 #endif /* (_FS_NOFSINFO & 3) != 3 */ 3135 #endif /* !_FS_READONLY */ 3136 } 3137 3138 fs->fs_type = fmt; /* FAT sub-type */ 3139 fs->id = ++Fsid; /* File system mount ID */ 3140 #if _USE_LFN == 1 3141 fs->lfnbuf = LfnBuf; /* Static LFN working buffer */ 3142 #if _FS_EXFAT 3143 fs->dirbuf = DirBuf; /* Static directory block working buuffer */ 3144 #endif 3145 #endif 3146 #if _FS_RPATH != 0 3147 fs->cdir = 0; /* Initialize current directory */ 3148 #endif 3149 #if _FS_LOCK != 0 /* Clear file lock semaphores */ 3150 clear_lock(fs); 3151 #endif 3152 return FR_OK; 3153 } 3154 3155 3156 3157 3158 /*-----------------------------------------------------------------------*/ 3159 /* Check if the file/directory object is valid or not */ 3160 /*-----------------------------------------------------------------------*/ 3161 3162 static 3163 FRESULT validate ( /* Returns FR_OK or FR_INVALID_OBJECT */ 3164 _FDID* obj, /* Pointer to the _OBJ, the 1st member in the FIL/DIR object, to check validity */ 3165 FATFS** fs /* Pointer to pointer to the owner file system object to return */ 3166 ) 3167 { 3168 FRESULT res; 3169 3170 3171 if (!obj || !obj->fs || !obj->fs->fs_type || obj->fs->id != obj->id || (disk_status(obj->fs->drv) & STA_NOINIT)) { 3172 *fs = 0; /* The object is invalid */ 3173 res = FR_INVALID_OBJECT; 3174 } else { 3175 *fs = obj->fs; /* Owner file sytem object */ 3176 ENTER_FF(obj->fs); /* Lock file system */ 3177 res = FR_OK; 3178 } 3179 return res; 3180 } 3181 3182 3183 3184 3185 /*--------------------------------------------------------------------------- 3186 3187 Public Functions (FatFs API) 3188 3189 ----------------------------------------------------------------------------*/ 3190 3191 3192 3193 /*-----------------------------------------------------------------------*/ 3194 /* Mount/Unmount a Logical Drive */ 3195 /*-----------------------------------------------------------------------*/ 3196 3197 FRESULT f_mount ( 3198 FATFS* fs, /* Pointer to the file system object (NULL:unmount)*/ 3199 const TCHAR* path, /* Logical drive number to be mounted/unmounted */ 3200 BYTE opt /* Mode option 0:Do not mount (delayed mount), 1:Mount immediately */ 3201 ) 3202 { 3203 FATFS *cfs; 3204 int vol; 3205 FRESULT res; 3206 const TCHAR *rp = path; 3207 3208 3209 /* Get logical drive number */ 3210 vol = get_ldnumber(&rp); 3211 if (vol < 0) return FR_INVALID_DRIVE; 3212 cfs = FatFs[vol]; /* Pointer to fs object */ 3213 3214 if (cfs) { 3215 #if _FS_LOCK != 0 3216 clear_lock(cfs); 3217 #endif 3218 #if _FS_REENTRANT /* Discard sync object of the current volume */ 3219 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR; 3220 #endif 3221 cfs->fs_type = 0; /* Clear old fs object */ 3222 } 3223 3224 if (fs) { 3225 fs->fs_type = 0; /* Clear new fs object */ 3226 #if _FS_REENTRANT /* Create sync object for the new volume */ 3227 if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR; 3228 #endif 3229 } 3230 FatFs[vol] = fs; /* Register new fs object */ 3231 3232 if (!fs || opt != 1) return FR_OK; /* Do not mount now, it will be mounted later */ 3233 3234 res = find_volume(&path, &fs, 0); /* Force mounted the volume */ 3235 LEAVE_FF(fs, res); 3236 } 3237 3238 3239 3240 3241 /*-----------------------------------------------------------------------*/ 3242 /* Open or Create a File */ 3243 /*-----------------------------------------------------------------------*/ 3244 3245 FRESULT f_open ( 3246 FIL* fp, /* Pointer to the blank file object */ 3247 const TCHAR* path, /* Pointer to the file name */ 3248 BYTE mode /* Access mode and file open mode flags */ 3249 ) 3250 { 3251 FRESULT res; 3252 DIR dj; 3253 FATFS *fs; 3254 #if !_FS_READONLY 3255 DWORD dw, cl, bcs, clst, sc; 3256 FSIZE_t ofs; 3257 #endif 3258 DEF_NAMBUF 3259 3260 3261 if (!fp) return FR_INVALID_OBJECT; 3262 3263 /* Get logical drive */ 3264 mode &= _FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND | FA_SEEKEND; 3265 res = find_volume(&path, &fs, mode); 3266 if (res == FR_OK) { 3267 dj.obj.fs = fs; 3268 INIT_NAMBUF(fs); 3269 res = follow_path(&dj, path); /* Follow the file path */ 3270 #if !_FS_READONLY /* R/W configuration */ 3271 if (res == FR_OK) { 3272 if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */ 3273 res = FR_INVALID_NAME; 3274 } 3275 #if _FS_LOCK != 0 3276 else { 3277 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 3278 } 3279 #endif 3280 } 3281 /* Create or Open a file */ 3282 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { 3283 if (res != FR_OK) { /* No file, create new */ 3284 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */ 3285 #if _FS_LOCK != 0 3286 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; 3287 #else 3288 res = dir_register(&dj); 3289 #endif 3290 mode |= FA_CREATE_ALWAYS; /* File is created */ 3291 } 3292 else { /* Any object is already existing */ 3293 if (dj.obj.attr & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */ 3294 res = FR_DENIED; 3295 } else { 3296 if (mode & FA_CREATE_NEW) res = FR_EXIST; /* Cannot create as new file */ 3297 } 3298 } 3299 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */ 3300 dw = GET_FATTIME(); 3301 #if _FS_EXFAT 3302 if (fs->fs_type == FS_EXFAT) { 3303 /* Get current allocation info */ 3304 fp->obj.fs = fs; 3305 fp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus); 3306 fp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize); 3307 fp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2; 3308 /* Initialize directory entry block */ 3309 st_dword(fs->dirbuf + XDIR_CrtTime, dw); /* Set created time */ 3310 fs->dirbuf[XDIR_CrtTime10] = 0; 3311 st_dword(fs->dirbuf + XDIR_ModTime, dw); /* Set modified time */ 3312 fs->dirbuf[XDIR_ModTime10] = 0; 3313 fs->dirbuf[XDIR_Attr] = AM_ARC; /* Reset attribute */ 3314 st_dword(fs->dirbuf + XDIR_FstClus, 0); /* Reset file allocation info */ 3315 st_qword(fs->dirbuf + XDIR_FileSize, 0); 3316 st_qword(fs->dirbuf + XDIR_ValidFileSize, 0); 3317 fs->dirbuf[XDIR_GenFlags] = 1; 3318 res = store_xdir(&dj); 3319 if (res == FR_OK && fp->obj.sclust) { /* Remove the cluster chain if exist */ 3320 res = remove_chain(&fp->obj, fp->obj.sclust, 0); 3321 fs->last_clst = fp->obj.sclust - 1; /* Reuse the cluster hole */ 3322 } 3323 } else 3324 #endif 3325 { 3326 /* Clean directory info */ 3327 st_dword(dj.dir + DIR_CrtTime, dw); /* Set created time */ 3328 st_dword(dj.dir + DIR_ModTime, dw); /* Set modified time */ 3329 dj.dir[DIR_Attr] = AM_ARC; /* Reset attribute */ 3330 cl = ld_clust(fs, dj.dir); /* Get cluster chain */ 3331 st_clust(fs, dj.dir, 0); /* Reset file allocation info */ 3332 st_dword(dj.dir + DIR_FileSize, 0); 3333 fs->wflag = 1; 3334 3335 if (cl) { /* Remove the cluster chain if exist */ 3336 dw = fs->winsect; 3337 res = remove_chain(&dj.obj, cl, 0); 3338 if (res == FR_OK) { 3339 res = move_window(fs, dw); 3340 fs->last_clst = cl - 1; /* Reuse the cluster hole */ 3341 } 3342 } 3343 } 3344 } 3345 } 3346 else { /* Open an existing file */ 3347 if (res == FR_OK) { /* Following succeeded */ 3348 if (dj.obj.attr & AM_DIR) { /* It is a directory */ 3349 res = FR_NO_FILE; 3350 } else { 3351 if ((mode & FA_WRITE) && (dj.obj.attr & AM_RDO)) { /* R/O violation */ 3352 res = FR_DENIED; 3353 } 3354 } 3355 } 3356 } 3357 if (res == FR_OK) { 3358 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */ 3359 mode |= FA_MODIFIED; 3360 fp->dir_sect = fs->winsect; /* Pointer to the directory entry */ 3361 fp->dir_ptr = dj.dir; 3362 #if _FS_LOCK != 0 3363 fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 3364 if (!fp->obj.lockid) res = FR_INT_ERR; 3365 #endif 3366 } 3367 #else /* R/O configuration */ 3368 if (res == FR_OK) { 3369 if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */ 3370 res = FR_INVALID_NAME; 3371 } else { 3372 if (dj.obj.attr & AM_DIR) { /* It is a directory */ 3373 res = FR_NO_FILE; 3374 } 3375 } 3376 } 3377 #endif 3378 3379 if (res == FR_OK) { 3380 #if _FS_EXFAT 3381 if (fs->fs_type == FS_EXFAT) { 3382 fp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Get allocation info */ 3383 fp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize); 3384 fp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2; 3385 fp->obj.c_scl = dj.obj.sclust; 3386 fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat; 3387 fp->obj.c_ofs = dj.blk_ofs; 3388 } else 3389 #endif 3390 { 3391 fp->obj.sclust = ld_clust(fs, dj.dir); /* Get allocation info */ 3392 fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize); 3393 } 3394 #if _USE_FASTSEEK 3395 fp->cltbl = 0; /* Disable fast seek mode */ 3396 #endif 3397 fp->obj.fs = fs; /* Validate the file object */ 3398 fp->obj.id = fs->id; 3399 fp->flag = mode; /* Set file access mode */ 3400 fp->err = 0; /* Clear error flag */ 3401 fp->sect = 0; /* Invalidate current data sector */ 3402 fp->fptr = 0; /* Set file pointer top of the file */ 3403 #if !_FS_READONLY 3404 #if !_FS_TINY 3405 mem_set(fp->buf, 0, _MAX_SS); /* Clear sector buffer */ 3406 #endif 3407 if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) { /* Seek to end of file if FA_OPEN_APPEND is specified */ 3408 fp->fptr = fp->obj.objsize; /* Offset to seek */ 3409 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size in byte */ 3410 clst = fp->obj.sclust; /* Follow the cluster chain */ 3411 for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) { 3412 clst = get_fat(&fp->obj, clst); 3413 if (clst <= 1) res = FR_INT_ERR; 3414 if (clst == 0xFFFFFFFF) res = FR_DISK_ERR; 3415 } 3416 fp->clust = clst; 3417 if (res == FR_OK && ofs % SS(fs)) { /* Fill sector buffer if not on the sector boundary */ 3418 if ((sc = clust2sect(fs, clst)) == 0) { 3419 res = FR_INT_ERR; 3420 } else { 3421 fp->sect = sc + (DWORD)(ofs / SS(fs)); 3422 #if !_FS_TINY 3423 if (disk_read(fs->drv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR; 3424 #endif 3425 } 3426 } 3427 } 3428 #endif 3429 } 3430 3431 FREE_NAMBUF(); 3432 } 3433 3434 if (res != FR_OK) fp->obj.fs = 0; /* Invalidate file object on error */ 3435 3436 LEAVE_FF(fs, res); 3437 } 3438 3439 3440 3441 3442 /*-----------------------------------------------------------------------*/ 3443 /* Read File */ 3444 /*-----------------------------------------------------------------------*/ 3445 3446 FRESULT f_read ( 3447 FIL* fp, /* Pointer to the file object */ 3448 void* buff, /* Pointer to data buffer */ 3449 UINT btr, /* Number of bytes to read */ 3450 UINT* br /* Pointer to number of bytes read */ 3451 ) 3452 { 3453 FRESULT res; 3454 FATFS *fs; 3455 DWORD clst, sect; 3456 FSIZE_t remain; 3457 UINT rcnt, cc, csect; 3458 BYTE *rbuff = (BYTE*)buff; 3459 3460 3461 *br = 0; /* Clear read byte counter */ 3462 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 3463 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ 3464 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 3465 remain = fp->obj.objsize - fp->fptr; 3466 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 3467 3468 for ( ; btr; /* Repeat until all data read */ 3469 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { 3470 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ 3471 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */ 3472 if (csect == 0) { /* On the cluster boundary? */ 3473 if (fp->fptr == 0) { /* On the top of the file? */ 3474 clst = fp->obj.sclust; /* Follow cluster chain from the origin */ 3475 } else { /* Middle or end of the file */ 3476 #if _USE_FASTSEEK 3477 if (fp->cltbl) { 3478 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 3479 } else 3480 #endif 3481 { 3482 clst = get_fat(&fp->obj, fp->clust); /* Follow cluster chain on the FAT */ 3483 } 3484 } 3485 if (clst < 2) ABORT(fs, FR_INT_ERR); 3486 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 3487 fp->clust = clst; /* Update current cluster */ 3488 } 3489 sect = clust2sect(fs, fp->clust); /* Get current sector */ 3490 if (!sect) ABORT(fs, FR_INT_ERR); 3491 sect += csect; 3492 cc = btr / SS(fs); /* When remaining bytes >= sector size, */ 3493 if (cc) { /* Read maximum contiguous sectors directly */ 3494 if (csect + cc > fs->csize) { /* Clip at cluster boundary */ 3495 cc = fs->csize - csect; 3496 } 3497 if (disk_read(fs->drv, rbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR); 3498 #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ 3499 #if _FS_TINY 3500 if (fs->wflag && fs->winsect - sect < cc) { 3501 mem_cpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs)); 3502 } 3503 #else 3504 if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) { 3505 mem_cpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs)); 3506 } 3507 #endif 3508 #endif 3509 rcnt = SS(fs) * cc; /* Number of bytes transferred */ 3510 continue; 3511 } 3512 #if !_FS_TINY 3513 if (fp->sect != sect) { /* Load data sector if not in cache */ 3514 #if !_FS_READONLY 3515 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 3516 if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 3517 fp->flag &= (BYTE)~FA_DIRTY; 3518 } 3519 #endif 3520 if (disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */ 3521 } 3522 #endif 3523 fp->sect = sect; 3524 } 3525 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */ 3526 if (rcnt > btr) rcnt = btr; /* Clip it by btr if needed */ 3527 #if _FS_TINY 3528 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */ 3529 mem_cpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt); /* Extract partial sector */ 3530 #else 3531 mem_cpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt); /* Extract partial sector */ 3532 #endif 3533 } 3534 3535 LEAVE_FF(fs, FR_OK); 3536 } 3537 3538 3539 3540 3541 #if !_FS_READONLY 3542 /*-----------------------------------------------------------------------*/ 3543 /* Write File */ 3544 /*-----------------------------------------------------------------------*/ 3545 3546 FRESULT f_write ( 3547 FIL* fp, /* Pointer to the file object */ 3548 const void* buff, /* Pointer to the data to be written */ 3549 UINT btw, /* Number of bytes to write */ 3550 UINT* bw /* Pointer to number of bytes written */ 3551 ) 3552 { 3553 FRESULT res; 3554 FATFS *fs; 3555 DWORD clst, sect; 3556 UINT wcnt, cc, csect; 3557 const BYTE *wbuff = (const BYTE*)buff; 3558 3559 3560 *bw = 0; /* Clear write byte counter */ 3561 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 3562 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ 3563 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 3564 3565 /* Check fptr wrap-around (file size cannot reach 4GiB on FATxx) */ 3566 if ((!_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) { 3567 btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr); 3568 } 3569 3570 for ( ; btw; /* Repeat until all data written */ 3571 wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize, *bw += wcnt, btw -= wcnt) { 3572 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ 3573 csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1); /* Sector offset in the cluster */ 3574 if (csect == 0) { /* On the cluster boundary? */ 3575 if (fp->fptr == 0) { /* On the top of the file? */ 3576 clst = fp->obj.sclust; /* Follow from the origin */ 3577 if (clst == 0) { /* If no cluster is allocated, */ 3578 clst = create_chain(&fp->obj, 0); /* create a new cluster chain */ 3579 } 3580 } else { /* On the middle or end of the file */ 3581 #if _USE_FASTSEEK 3582 if (fp->cltbl) { 3583 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 3584 } else 3585 #endif 3586 { 3587 clst = create_chain(&fp->obj, fp->clust); /* Follow or stretch cluster chain on the FAT */ 3588 } 3589 } 3590 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ 3591 if (clst == 1) ABORT(fs, FR_INT_ERR); 3592 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 3593 fp->clust = clst; /* Update current cluster */ 3594 if (fp->obj.sclust == 0) fp->obj.sclust = clst; /* Set start cluster if the first write */ 3595 } 3596 #if _FS_TINY 3597 if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Write-back sector cache */ 3598 #else 3599 if (fp->flag & FA_DIRTY) { /* Write-back sector cache */ 3600 if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 3601 fp->flag &= (BYTE)~FA_DIRTY; 3602 } 3603 #endif 3604 sect = clust2sect(fs, fp->clust); /* Get current sector */ 3605 if (!sect) ABORT(fs, FR_INT_ERR); 3606 sect += csect; 3607 cc = btw / SS(fs); /* When remaining bytes >= sector size, */ 3608 if (cc) { /* Write maximum contiguous sectors directly */ 3609 if (csect + cc > fs->csize) { /* Clip at cluster boundary */ 3610 cc = fs->csize - csect; 3611 } 3612 if (disk_write(fs->drv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR); 3613 #if _FS_MINIMIZE <= 2 3614 #if _FS_TINY 3615 if (fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 3616 mem_cpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs)); 3617 fs->wflag = 0; 3618 } 3619 #else 3620 if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 3621 mem_cpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs)); 3622 fp->flag &= (BYTE)~FA_DIRTY; 3623 } 3624 #endif 3625 #endif 3626 wcnt = SS(fs) * cc; /* Number of bytes transferred */ 3627 continue; 3628 } 3629 #if _FS_TINY 3630 if (fp->fptr >= fp->obj.objsize) { /* Avoid silly cache filling on the growing edge */ 3631 if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); 3632 fs->winsect = sect; 3633 } 3634 #else 3635 if (fp->sect != sect && /* Fill sector cache with file data */ 3636 fp->fptr < fp->obj.objsize && 3637 disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) { 3638 ABORT(fs, FR_DISK_ERR); 3639 } 3640 #endif 3641 fp->sect = sect; 3642 } 3643 wcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */ 3644 if (wcnt > btw) wcnt = btw; /* Clip it by btw if needed */ 3645 #if _FS_TINY 3646 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */ 3647 mem_cpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */ 3648 fs->wflag = 1; 3649 #else 3650 mem_cpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */ 3651 fp->flag |= FA_DIRTY; 3652 #endif 3653 } 3654 3655 fp->flag |= FA_MODIFIED; /* Set file change flag */ 3656 3657 LEAVE_FF(fs, FR_OK); 3658 } 3659 3660 3661 3662 3663 /*-----------------------------------------------------------------------*/ 3664 /* Synchronize the File */ 3665 /*-----------------------------------------------------------------------*/ 3666 3667 FRESULT f_sync ( 3668 FIL* fp /* Pointer to the file object */ 3669 ) 3670 { 3671 FRESULT res; 3672 FATFS *fs; 3673 DWORD tm; 3674 BYTE *dir; 3675 #if _FS_EXFAT 3676 DEF_NAMBUF 3677 #endif 3678 3679 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 3680 if (res == FR_OK) { 3681 if (fp->flag & FA_MODIFIED) { /* Is there any change to the file? */ 3682 #if !_FS_TINY 3683 if (fp->flag & FA_DIRTY) { /* Write-back cached data if needed */ 3684 if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR); 3685 fp->flag &= (BYTE)~FA_DIRTY; 3686 } 3687 #endif 3688 /* Update the directory entry */ 3689 tm = GET_FATTIME(); /* Modified time */ 3690 #if _FS_EXFAT 3691 if (fs->fs_type == FS_EXFAT) { 3692 res = fill_fat_chain(&fp->obj); /* Create FAT chain if needed */ 3693 if (res == FR_OK) { 3694 DIR dj; 3695 3696 INIT_NAMBUF(fs); 3697 res = load_obj_dir(&dj, &fp->obj); /* Load directory entry block */ 3698 if (res == FR_OK) { 3699 fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive bit */ 3700 fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1; /* Update file allocation info */ 3701 st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust); 3702 st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize); 3703 st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize); 3704 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Update modified time */ 3705 fs->dirbuf[XDIR_ModTime10] = 0; 3706 st_dword(fs->dirbuf + XDIR_AccTime, 0); 3707 res = store_xdir(&dj); /* Restore it to the directory */ 3708 if (res == FR_OK) { 3709 res = sync_fs(fs); 3710 fp->flag &= (BYTE)~FA_MODIFIED; 3711 } 3712 } 3713 FREE_NAMBUF(); 3714 } 3715 } else 3716 #endif 3717 { 3718 res = move_window(fs, fp->dir_sect); 3719 if (res == FR_OK) { 3720 dir = fp->dir_ptr; 3721 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ 3722 st_clust(fp->obj.fs, dir, fp->obj.sclust); /* Update file allocation info */ 3723 st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize); /* Update file size */ 3724 st_dword(dir + DIR_ModTime, tm); /* Update modified time */ 3725 st_word(dir + DIR_LstAccDate, 0); 3726 fs->wflag = 1; 3727 res = sync_fs(fs); /* Restore it to the directory */ 3728 fp->flag &= (BYTE)~FA_MODIFIED; 3729 } 3730 } 3731 } 3732 } 3733 3734 LEAVE_FF(fs, res); 3735 } 3736 3737 #endif /* !_FS_READONLY */ 3738 3739 3740 3741 3742 /*-----------------------------------------------------------------------*/ 3743 /* Close File */ 3744 /*-----------------------------------------------------------------------*/ 3745 3746 FRESULT f_close ( 3747 FIL* fp /* Pointer to the file object to be closed */ 3748 ) 3749 { 3750 FRESULT res; 3751 FATFS *fs; 3752 3753 #if !_FS_READONLY 3754 res = f_sync(fp); /* Flush cached data */ 3755 if (res == FR_OK) 3756 #endif 3757 { 3758 res = validate(&fp->obj, &fs); /* Lock volume */ 3759 if (res == FR_OK) { 3760 #if _FS_LOCK != 0 3761 res = dec_lock(fp->obj.lockid); /* Decrement file open counter */ 3762 if (res == FR_OK) 3763 #endif 3764 { 3765 fp->obj.fs = 0; /* Invalidate file object */ 3766 } 3767 #if _FS_REENTRANT 3768 unlock_fs(fs, FR_OK); /* Unlock volume */ 3769 #endif 3770 } 3771 } 3772 return res; 3773 } 3774 3775 3776 3777 3778 #if _FS_RPATH >= 1 3779 /*-----------------------------------------------------------------------*/ 3780 /* Change Current Directory or Current Drive, Get Current Directory */ 3781 /*-----------------------------------------------------------------------*/ 3782 3783 #if _VOLUMES >= 2 3784 FRESULT f_chdrive ( 3785 const TCHAR* path /* Drive number */ 3786 ) 3787 { 3788 int vol; 3789 3790 3791 /* Get logical drive number */ 3792 vol = get_ldnumber(&path); 3793 if (vol < 0) return FR_INVALID_DRIVE; 3794 3795 CurrVol = (BYTE)vol; /* Set it as current volume */ 3796 3797 return FR_OK; 3798 } 3799 #endif 3800 3801 3802 FRESULT f_chdir ( 3803 const TCHAR* path /* Pointer to the directory path */ 3804 ) 3805 { 3806 FRESULT res; 3807 DIR dj; 3808 FATFS *fs; 3809 DEF_NAMBUF 3810 3811 /* Get logical drive */ 3812 res = find_volume(&path, &fs, 0); 3813 if (res == FR_OK) { 3814 dj.obj.fs = fs; 3815 INIT_NAMBUF(fs); 3816 res = follow_path(&dj, path); /* Follow the path */ 3817 if (res == FR_OK) { /* Follow completed */ 3818 if (dj.fn[NSFLAG] & NS_NONAME) { 3819 fs->cdir = dj.obj.sclust; /* It is the start directory itself */ 3820 #if _FS_EXFAT 3821 if (fs->fs_type == FS_EXFAT) { 3822 fs->cdc_scl = dj.obj.c_scl; 3823 fs->cdc_size = dj.obj.c_size; 3824 fs->cdc_ofs = dj.obj.c_ofs; 3825 } 3826 #endif 3827 } else { 3828 if (dj.obj.attr & AM_DIR) { /* It is a sub-directory */ 3829 #if _FS_EXFAT 3830 if (fs->fs_type == FS_EXFAT) { 3831 fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus); /* Sub-directory cluster */ 3832 fs->cdc_scl = dj.obj.sclust; /* Save containing directory information */ 3833 fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat; 3834 fs->cdc_ofs = dj.blk_ofs; 3835 } else 3836 #endif 3837 { 3838 fs->cdir = ld_clust(fs, dj.dir); /* Sub-directory cluster */ 3839 } 3840 } else { 3841 res = FR_NO_PATH; /* Reached but a file */ 3842 } 3843 } 3844 } 3845 FREE_NAMBUF(); 3846 if (res == FR_NO_FILE) res = FR_NO_PATH; 3847 } 3848 3849 LEAVE_FF(fs, res); 3850 } 3851 3852 3853 #if _FS_RPATH >= 2 3854 FRESULT f_getcwd ( 3855 TCHAR* buff, /* Pointer to the directory path */ 3856 UINT len /* Size of path */ 3857 ) 3858 { 3859 FRESULT res; 3860 DIR dj; 3861 FATFS *fs; 3862 UINT i, n; 3863 DWORD ccl; 3864 TCHAR *tp; 3865 FILINFO fno; 3866 DEF_NAMBUF 3867 3868 3869 *buff = 0; 3870 /* Get logical drive */ 3871 res = find_volume((const TCHAR**)&buff, &fs, 0); /* Get current volume */ 3872 if (res == FR_OK) { 3873 dj.obj.fs = fs; 3874 INIT_NAMBUF(fs); 3875 i = len; /* Bottom of buffer (directory stack base) */ 3876 if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* (Cannot do getcwd on exFAT and returns root path) */ 3877 dj.obj.sclust = fs->cdir; /* Start to follow upper directory from current directory */ 3878 while ((ccl = dj.obj.sclust) != 0) { /* Repeat while current directory is a sub-directory */ 3879 res = dir_sdi(&dj, 1 * SZDIRE); /* Get parent directory */ 3880 if (res != FR_OK) break; 3881 res = move_window(fs, dj.sect); 3882 if (res != FR_OK) break; 3883 dj.obj.sclust = ld_clust(fs, dj.dir); /* Goto parent directory */ 3884 res = dir_sdi(&dj, 0); 3885 if (res != FR_OK) break; 3886 do { /* Find the entry links to the child directory */ 3887 res = dir_read(&dj, 0); 3888 if (res != FR_OK) break; 3889 if (ccl == ld_clust(fs, dj.dir)) break; /* Found the entry */ 3890 res = dir_next(&dj, 0); 3891 } while (res == FR_OK); 3892 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ 3893 if (res != FR_OK) break; 3894 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */ 3895 for (n = 0; fno.fname[n]; n++) ; 3896 if (i < n + 3) { 3897 res = FR_NOT_ENOUGH_CORE; break; 3898 } 3899 while (n) buff[--i] = fno.fname[--n]; 3900 buff[--i] = '/'; 3901 } 3902 } 3903 tp = buff; 3904 if (res == FR_OK) { 3905 #if _VOLUMES >= 2 3906 *tp++ = '0' + CurrVol; /* Put drive number */ 3907 *tp++ = ':'; 3908 #endif 3909 if (i == len) { /* Root-directory */ 3910 *tp++ = '/'; 3911 } else { /* Sub-directroy */ 3912 do /* Add stacked path str */ 3913 *tp++ = buff[i++]; 3914 while (i < len); 3915 } 3916 } 3917 *tp = 0; 3918 FREE_NAMBUF(); 3919 } 3920 3921 LEAVE_FF(fs, res); 3922 } 3923 3924 #endif /* _FS_RPATH >= 2 */ 3925 #endif /* _FS_RPATH >= 1 */ 3926 3927 3928 3929 #if _FS_MINIMIZE <= 2 3930 /*-----------------------------------------------------------------------*/ 3931 /* Seek File R/W Pointer */ 3932 /*-----------------------------------------------------------------------*/ 3933 3934 FRESULT f_lseek ( 3935 FIL* fp, /* Pointer to the file object */ 3936 FSIZE_t ofs /* File pointer from top of file */ 3937 ) 3938 { 3939 FRESULT res; 3940 FATFS *fs; 3941 DWORD clst, bcs, nsect; 3942 FSIZE_t ifptr; 3943 #if _USE_FASTSEEK 3944 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl; 3945 #endif 3946 3947 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 3948 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ 3949 #if _USE_FASTSEEK 3950 if (fp->cltbl) { /* Fast seek */ 3951 if (ofs == CREATE_LINKMAP) { /* Create CLMT */ 3952 tbl = fp->cltbl; 3953 tlen = *tbl++; ulen = 2; /* Given table size and required table size */ 3954 cl = fp->obj.sclust; /* Origin of the chain */ 3955 if (cl) { 3956 do { 3957 /* Get a fragment */ 3958 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */ 3959 do { 3960 pcl = cl; ncl++; 3961 cl = get_fat(&fp->obj, cl); 3962 if (cl <= 1) ABORT(fs, FR_INT_ERR); 3963 if (cl == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 3964 } while (cl == pcl + 1); 3965 if (ulen <= tlen) { /* Store the length and top of the fragment */ 3966 *tbl++ = ncl; *tbl++ = tcl; 3967 } 3968 } while (cl < fs->n_fatent); /* Repeat until end of chain */ 3969 } 3970 *fp->cltbl = ulen; /* Number of items used */ 3971 if (ulen <= tlen) { 3972 *tbl = 0; /* Terminate table */ 3973 } else { 3974 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */ 3975 } 3976 } else { /* Fast seek */ 3977 if (ofs > fp->obj.objsize) ofs = fp->obj.objsize; /* Clip offset at the file size */ 3978 fp->fptr = ofs; /* Set file pointer */ 3979 if (ofs) { 3980 fp->clust = clmt_clust(fp, ofs - 1); 3981 dsc = clust2sect(fs, fp->clust); 3982 if (!dsc) ABORT(fs, FR_INT_ERR); 3983 dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1); 3984 if (fp->fptr % SS(fs) && dsc != fp->sect) { /* Refill sector cache if needed */ 3985 #if !_FS_TINY 3986 #if !_FS_READONLY 3987 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 3988 if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 3989 fp->flag &= (BYTE)~FA_DIRTY; 3990 } 3991 #endif 3992 if (disk_read(fs->drv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Load current sector */ 3993 #endif 3994 fp->sect = dsc; 3995 } 3996 } 3997 } 3998 } else 3999 #endif 4000 4001 /* Normal Seek */ 4002 { 4003 #if _FS_EXFAT 4004 if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF; /* Clip at 4GiB-1 if at FATxx */ 4005 #endif 4006 if (ofs > fp->obj.objsize && (_FS_READONLY || !(fp->flag & FA_WRITE))) { /* In read-only mode, clip offset with the file size */ 4007 ofs = fp->obj.objsize; 4008 } 4009 ifptr = fp->fptr; 4010 fp->fptr = nsect = 0; 4011 if (ofs) { 4012 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size (byte) */ 4013 if (ifptr > 0 && 4014 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ 4015 fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1); /* start from the current cluster */ 4016 ofs -= fp->fptr; 4017 clst = fp->clust; 4018 } else { /* When seek to back cluster, */ 4019 clst = fp->obj.sclust; /* start from the first cluster */ 4020 #if !_FS_READONLY 4021 if (clst == 0) { /* If no cluster chain, create a new chain */ 4022 clst = create_chain(&fp->obj, 0); 4023 if (clst == 1) ABORT(fs, FR_INT_ERR); 4024 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 4025 fp->obj.sclust = clst; 4026 } 4027 #endif 4028 fp->clust = clst; 4029 } 4030 if (clst != 0) { 4031 while (ofs > bcs) { /* Cluster following loop */ 4032 ofs -= bcs; fp->fptr += bcs; 4033 #if !_FS_READONLY 4034 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ 4035 if (_FS_EXFAT && fp->fptr > fp->obj.objsize) { /* No FAT chain object needs correct objsize to generate FAT value */ 4036 fp->obj.objsize = fp->fptr; 4037 fp->flag |= FA_MODIFIED; 4038 } 4039 clst = create_chain(&fp->obj, clst); /* Follow chain with forceed stretch */ 4040 if (clst == 0) { /* Clip file size in case of disk full */ 4041 ofs = 0; break; 4042 } 4043 } else 4044 #endif 4045 { 4046 clst = get_fat(&fp->obj, clst); /* Follow cluster chain if not in write mode */ 4047 } 4048 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 4049 if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR); 4050 fp->clust = clst; 4051 } 4052 fp->fptr += ofs; 4053 if (ofs % SS(fs)) { 4054 nsect = clust2sect(fs, clst); /* Current sector */ 4055 if (!nsect) ABORT(fs, FR_INT_ERR); 4056 nsect += (DWORD)(ofs / SS(fs)); 4057 } 4058 } 4059 } 4060 if (!_FS_READONLY && fp->fptr > fp->obj.objsize) { /* Set file change flag if the file size is extended */ 4061 fp->obj.objsize = fp->fptr; 4062 fp->flag |= FA_MODIFIED; 4063 } 4064 if (fp->fptr % SS(fs) && nsect != fp->sect) { /* Fill sector cache if needed */ 4065 #if !_FS_TINY 4066 #if !_FS_READONLY 4067 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 4068 if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 4069 fp->flag &= (BYTE)~FA_DIRTY; 4070 } 4071 #endif 4072 if (disk_read(fs->drv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */ 4073 #endif 4074 fp->sect = nsect; 4075 } 4076 } 4077 4078 LEAVE_FF(fs, res); 4079 } 4080 4081 4082 4083 #if _FS_MINIMIZE <= 1 4084 /*-----------------------------------------------------------------------*/ 4085 /* Create a Directory Object */ 4086 /*-----------------------------------------------------------------------*/ 4087 4088 FRESULT f_opendir ( 4089 DIR* dp, /* Pointer to directory object to create */ 4090 const TCHAR* path /* Pointer to the directory path */ 4091 ) 4092 { 4093 FRESULT res; 4094 FATFS *fs; 4095 _FDID *obj; 4096 DEF_NAMBUF 4097 4098 4099 if (!dp) return FR_INVALID_OBJECT; 4100 4101 /* Get logical drive */ 4102 obj = &dp->obj; 4103 res = find_volume(&path, &fs, 0); 4104 if (res == FR_OK) { 4105 obj->fs = fs; 4106 INIT_NAMBUF(fs); 4107 res = follow_path(dp, path); /* Follow the path to the directory */ 4108 if (res == FR_OK) { /* Follow completed */ 4109 if (!(dp->fn[NSFLAG] & NS_NONAME)) { /* It is not the origin directory itself */ 4110 if (obj->attr & AM_DIR) { /* This object is a sub-directory */ 4111 #if _FS_EXFAT 4112 if (fs->fs_type == FS_EXFAT) { 4113 obj->c_scl = obj->sclust; /* Save containing directory inforamation */ 4114 obj->c_size = ((DWORD)obj->objsize & 0xFFFFFF00) | obj->stat; 4115 obj->c_ofs = dp->blk_ofs; 4116 obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Get object location and status */ 4117 obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize); 4118 obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; 4119 } else 4120 #endif 4121 { 4122 obj->sclust = ld_clust(fs, dp->dir); /* Get object location */ 4123 } 4124 } else { /* This object is a file */ 4125 res = FR_NO_PATH; 4126 } 4127 } 4128 if (res == FR_OK) { 4129 obj->id = fs->id; 4130 res = dir_sdi(dp, 0); /* Rewind directory */ 4131 #if _FS_LOCK != 0 4132 if (res == FR_OK) { 4133 if (obj->sclust) { 4134 obj->lockid = inc_lock(dp, 0); /* Lock the sub directory */ 4135 if (!obj->lockid) res = FR_TOO_MANY_OPEN_FILES; 4136 } else { 4137 obj->lockid = 0; /* Root directory need not to be locked */ 4138 } 4139 } 4140 #endif 4141 } 4142 } 4143 FREE_NAMBUF(); 4144 if (res == FR_NO_FILE) res = FR_NO_PATH; 4145 } 4146 if (res != FR_OK) obj->fs = 0; /* Invalidate the directory object if function faild */ 4147 4148 LEAVE_FF(fs, res); 4149 } 4150 4151 4152 4153 4154 /*-----------------------------------------------------------------------*/ 4155 /* Close Directory */ 4156 /*-----------------------------------------------------------------------*/ 4157 4158 FRESULT f_closedir ( 4159 DIR *dp /* Pointer to the directory object to be closed */ 4160 ) 4161 { 4162 FRESULT res; 4163 FATFS *fs; 4164 4165 4166 res = validate(&dp->obj, &fs); /* Check validity of the file object */ 4167 if (res == FR_OK) { 4168 #if _FS_LOCK != 0 4169 if (dp->obj.lockid) { /* Decrement sub-directory open counter */ 4170 res = dec_lock(dp->obj.lockid); 4171 } 4172 if (res == FR_OK) 4173 #endif 4174 { 4175 dp->obj.fs = 0; /* Invalidate directory object */ 4176 } 4177 #if _FS_REENTRANT 4178 unlock_fs(fs, FR_OK); /* Unlock volume */ 4179 #endif 4180 } 4181 return res; 4182 } 4183 4184 4185 4186 4187 /*-----------------------------------------------------------------------*/ 4188 /* Read Directory Entries in Sequence */ 4189 /*-----------------------------------------------------------------------*/ 4190 4191 FRESULT f_readdir ( 4192 DIR* dp, /* Pointer to the open directory object */ 4193 FILINFO* fno /* Pointer to file information to return */ 4194 ) 4195 { 4196 FRESULT res; 4197 FATFS *fs; 4198 DEF_NAMBUF 4199 4200 4201 res = validate(&dp->obj, &fs); /* Check validity of the directory object */ 4202 if (res == FR_OK) { 4203 if (!fno) { 4204 res = dir_sdi(dp, 0); /* Rewind the directory object */ 4205 } else { 4206 INIT_NAMBUF(fs); 4207 res = dir_read(dp, 0); /* Read an item */ 4208 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory */ 4209 if (res == FR_OK) { /* A valid entry is found */ 4210 get_fileinfo(dp, fno); /* Get the object information */ 4211 res = dir_next(dp, 0); /* Increment index for next */ 4212 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory now */ 4213 } 4214 FREE_NAMBUF(); 4215 } 4216 } 4217 LEAVE_FF(fs, res); 4218 } 4219 4220 FRESULT f_seekdir( 4221 DIR *dj, /* Pointer to the open directory object */ 4222 int offset /* the seek offset */ 4223 ) 4224 { 4225 int i = 0; 4226 4227 if (dir_sdi(dj, 0) != FR_OK || offset < 0) 4228 return FR_INT_ERR; 4229 4230 while(i < offset) 4231 { 4232 if(dir_read(dj, 0) != FR_OK || dir_next(dj, 0) != FR_OK) 4233 return FR_INT_ERR; 4234 i++; 4235 } 4236 return FR_OK; 4237 } 4238 4239 #if _USE_FIND 4240 /*-----------------------------------------------------------------------*/ 4241 /* Find Next File */ 4242 /*-----------------------------------------------------------------------*/ 4243 4244 FRESULT f_findnext ( 4245 DIR* dp, /* Pointer to the open directory object */ 4246 FILINFO* fno /* Pointer to the file information structure */ 4247 ) 4248 { 4249 FRESULT res; 4250 4251 4252 for (;;) { 4253 res = f_readdir(dp, fno); /* Get a directory item */ 4254 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */ 4255 if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for the file name */ 4256 #if _USE_LFN != 0 && _USE_FIND == 2 4257 if (pattern_matching(dp->pat, fno->altname, 0, 0)) break; /* Test for alternative name if exist */ 4258 #endif 4259 } 4260 return res; 4261 } 4262 4263 4264 4265 /*-----------------------------------------------------------------------*/ 4266 /* Find First File */ 4267 /*-----------------------------------------------------------------------*/ 4268 4269 FRESULT f_findfirst ( 4270 DIR* dp, /* Pointer to the blank directory object */ 4271 FILINFO* fno, /* Pointer to the file information structure */ 4272 const TCHAR* path, /* Pointer to the directory to open */ 4273 const TCHAR* pattern /* Pointer to the matching pattern */ 4274 ) 4275 { 4276 FRESULT res; 4277 4278 4279 dp->pat = pattern; /* Save pointer to pattern string */ 4280 res = f_opendir(dp, path); /* Open the target directory */ 4281 if (res == FR_OK) { 4282 res = f_findnext(dp, fno); /* Find the first item */ 4283 } 4284 return res; 4285 } 4286 4287 #endif /* _USE_FIND */ 4288 4289 4290 4291 #if _FS_MINIMIZE == 0 4292 /*-----------------------------------------------------------------------*/ 4293 /* Get File Status */ 4294 /*-----------------------------------------------------------------------*/ 4295 4296 FRESULT f_stat ( 4297 const TCHAR* path, /* Pointer to the file path */ 4298 FILINFO* fno /* Pointer to file information to return */ 4299 ) 4300 { 4301 FRESULT res; 4302 DIR dj; 4303 DEF_NAMBUF 4304 4305 4306 /* Get logical drive */ 4307 res = find_volume(&path, &dj.obj.fs, 0); 4308 if (res == FR_OK) { 4309 INIT_NAMBUF(dj.obj.fs); 4310 res = follow_path(&dj, path); /* Follow the file path */ 4311 if (res == FR_OK) { /* Follow completed */ 4312 if (dj.fn[NSFLAG] & NS_NONAME) { /* It is origin directory */ 4313 res = FR_INVALID_NAME; 4314 } else { /* Found an object */ 4315 if (fno) get_fileinfo(&dj, fno); 4316 } 4317 } 4318 FREE_NAMBUF(); 4319 } 4320 4321 LEAVE_FF(dj.obj.fs, res); 4322 } 4323 4324 4325 4326 #if !_FS_READONLY 4327 /*-----------------------------------------------------------------------*/ 4328 /* Get Number of Free Clusters */ 4329 /*-----------------------------------------------------------------------*/ 4330 4331 FRESULT f_getfree ( 4332 const TCHAR* path, /* Path name of the logical drive number */ 4333 DWORD* nclst, /* Pointer to a variable to return number of free clusters */ 4334 FATFS** fatfs /* Pointer to return pointer to corresponding file system object */ 4335 ) 4336 { 4337 FRESULT res; 4338 FATFS *fs; 4339 DWORD nfree, clst, sect, stat; 4340 UINT i; 4341 BYTE *p; 4342 _FDID obj; 4343 4344 4345 /* Get logical drive */ 4346 res = find_volume(&path, &fs, 0); 4347 if (res == FR_OK) { 4348 *fatfs = fs; /* Return ptr to the fs object */ 4349 /* If free_clst is valid, return it without full cluster scan */ 4350 if (fs->free_clst <= fs->n_fatent - 2) { 4351 *nclst = fs->free_clst; 4352 } else { 4353 /* Get number of free clusters */ 4354 nfree = 0; 4355 if (fs->fs_type == FS_FAT12) { /* FAT12: Sector unalighed FAT entries */ 4356 clst = 2; obj.fs = fs; 4357 do { 4358 stat = get_fat(&obj, clst); 4359 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 4360 if (stat == 1) { res = FR_INT_ERR; break; } 4361 if (stat == 0) nfree++; 4362 } while (++clst < fs->n_fatent); 4363 } else { 4364 #if _FS_EXFAT 4365 if (fs->fs_type == FS_EXFAT) { /* exFAT: Scan bitmap table */ 4366 BYTE bm; 4367 UINT b; 4368 4369 clst = fs->n_fatent - 2; 4370 sect = fs->database; 4371 i = 0; 4372 do { 4373 if (i == 0 && (res = move_window(fs, sect++)) != FR_OK) break; 4374 for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) { 4375 if (!(bm & 1)) nfree++; 4376 bm >>= 1; 4377 } 4378 i = (i + 1) % SS(fs); 4379 } while (clst); 4380 } else 4381 #endif 4382 { /* FAT16/32: Sector alighed FAT entries */ 4383 clst = fs->n_fatent; sect = fs->fatbase; 4384 i = 0; p = 0; 4385 do { 4386 if (i == 0) { 4387 res = move_window(fs, sect++); 4388 if (res != FR_OK) break; 4389 p = fs->win; 4390 i = SS(fs); 4391 } 4392 if (fs->fs_type == FS_FAT16) { 4393 if (ld_word(p) == 0) nfree++; 4394 p += 2; i -= 2; 4395 } else { 4396 if ((ld_dword(p) & 0x0FFFFFFF) == 0) nfree++; 4397 p += 4; i -= 4; 4398 } 4399 } while (--clst); 4400 } 4401 } 4402 *nclst = nfree; /* Return the free clusters */ 4403 fs->free_clst = nfree; /* Now free_clst is valid */ 4404 fs->fsi_flag |= 1; /* FSInfo is to be updated */ 4405 } 4406 } 4407 4408 LEAVE_FF(fs, res); 4409 } 4410 4411 4412 4413 4414 /*-----------------------------------------------------------------------*/ 4415 /* Truncate File */ 4416 /*-----------------------------------------------------------------------*/ 4417 4418 FRESULT f_truncate ( 4419 FIL* fp /* Pointer to the file object */ 4420 ) 4421 { 4422 FRESULT res; 4423 FATFS *fs; 4424 DWORD ncl; 4425 4426 4427 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 4428 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); 4429 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 4430 4431 if (fp->obj.objsize > fp->fptr) { 4432 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ 4433 res = remove_chain(&fp->obj, fp->obj.sclust, 0); 4434 fp->obj.sclust = 0; 4435 } else { /* When truncate a part of the file, remove remaining clusters */ 4436 ncl = get_fat(&fp->obj, fp->clust); 4437 res = FR_OK; 4438 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; 4439 if (ncl == 1) res = FR_INT_ERR; 4440 if (res == FR_OK && ncl < fs->n_fatent) { 4441 res = remove_chain(&fp->obj, ncl, fp->clust); 4442 } 4443 } 4444 fp->obj.objsize = fp->fptr; /* Set file size to current R/W point */ 4445 fp->flag |= FA_MODIFIED; 4446 #if !_FS_TINY 4447 if (res == FR_OK && (fp->flag & FA_DIRTY)) { 4448 if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) { 4449 res = FR_DISK_ERR; 4450 } else { 4451 fp->flag &= (BYTE)~FA_DIRTY; 4452 } 4453 } 4454 #endif 4455 if (res != FR_OK) ABORT(fs, res); 4456 } 4457 4458 LEAVE_FF(fs, res); 4459 } 4460 4461 4462 4463 4464 /*-----------------------------------------------------------------------*/ 4465 /* Delete a File/Directory */ 4466 /*-----------------------------------------------------------------------*/ 4467 4468 FRESULT f_unlink ( 4469 const TCHAR* path /* Pointer to the file or directory path */ 4470 ) 4471 { 4472 FRESULT res; 4473 DIR dj, sdj; 4474 DWORD dclst = 0; 4475 FATFS *fs; 4476 #if _FS_EXFAT 4477 _FDID obj; 4478 #endif 4479 DEF_NAMBUF 4480 4481 4482 /* Get logical drive */ 4483 res = find_volume(&path, &fs, FA_WRITE); 4484 dj.obj.fs = fs; 4485 if (res == FR_OK) { 4486 INIT_NAMBUF(fs); 4487 res = follow_path(&dj, path); /* Follow the file path */ 4488 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) { 4489 res = FR_INVALID_NAME; /* Cannot remove dot entry */ 4490 } 4491 #if _FS_LOCK != 0 4492 if (res == FR_OK) res = chk_lock(&dj, 2); /* Check if it is an open object */ 4493 #endif 4494 if (res == FR_OK) { /* The object is accessible */ 4495 if (dj.fn[NSFLAG] & NS_NONAME) { 4496 res = FR_INVALID_NAME; /* Cannot remove the origin directory */ 4497 } else { 4498 if (dj.obj.attr & AM_RDO) { 4499 res = FR_DENIED; /* Cannot remove R/O object */ 4500 } 4501 } 4502 if (res == FR_OK) { 4503 #if _FS_EXFAT 4504 obj.fs = fs; 4505 if (fs->fs_type == FS_EXFAT) { 4506 obj.sclust = dclst = ld_dword(fs->dirbuf + XDIR_FstClus); 4507 obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize); 4508 obj.stat = fs->dirbuf[XDIR_GenFlags] & 2; 4509 } else 4510 #endif 4511 { 4512 dclst = ld_clust(fs, dj.dir); 4513 } 4514 if (dj.obj.attr & AM_DIR) { /* Is it a sub-directory ? */ 4515 #if _FS_RPATH != 0 4516 if (dclst == fs->cdir) { /* Is it the current directory? */ 4517 res = FR_DENIED; 4518 } else 4519 #endif 4520 { 4521 sdj.obj.fs = fs; /* Open the sub-directory */ 4522 sdj.obj.sclust = dclst; 4523 #if _FS_EXFAT 4524 if (fs->fs_type == FS_EXFAT) { 4525 sdj.obj.objsize = obj.objsize; 4526 sdj.obj.stat = obj.stat; 4527 } 4528 #endif 4529 res = dir_sdi(&sdj, 0); 4530 if (res == FR_OK) { 4531 res = dir_read(&sdj, 0); /* Read an item */ 4532 if (res == FR_OK) res = FR_DENIED; /* Not empty? */ 4533 if (res == FR_NO_FILE) res = FR_OK; /* Empty? */ 4534 } 4535 } 4536 } 4537 } 4538 if (res == FR_OK) { 4539 res = dir_remove(&dj); /* Remove the directory entry */ 4540 if (res == FR_OK && dclst) { /* Remove the cluster chain if exist */ 4541 #if _FS_EXFAT 4542 res = remove_chain(&obj, dclst, 0); 4543 #else 4544 res = remove_chain(&dj.obj, dclst, 0); 4545 #endif 4546 } 4547 if (res == FR_OK) res = sync_fs(fs); 4548 } 4549 } 4550 FREE_NAMBUF(); 4551 } 4552 4553 LEAVE_FF(fs, res); 4554 } 4555 4556 4557 4558 4559 /*-----------------------------------------------------------------------*/ 4560 /* Create a Directory */ 4561 /*-----------------------------------------------------------------------*/ 4562 4563 FRESULT f_mkdir ( 4564 const TCHAR* path /* Pointer to the directory path */ 4565 ) 4566 { 4567 FRESULT res; 4568 DIR dj; 4569 FATFS *fs; 4570 BYTE *dir; 4571 UINT n; 4572 DWORD dsc, dcl, pcl, tm; 4573 DEF_NAMBUF 4574 4575 4576 /* Get logical drive */ 4577 res = find_volume(&path, &fs, FA_WRITE); 4578 dj.obj.fs = fs; 4579 if (res == FR_OK) { 4580 INIT_NAMBUF(fs); 4581 res = follow_path(&dj, path); /* Follow the file path */ 4582 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */ 4583 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) { 4584 res = FR_INVALID_NAME; 4585 } 4586 if (res == FR_NO_FILE) { /* Can create a new directory */ 4587 dcl = create_chain(&dj.obj, 0); /* Allocate a cluster for the new directory table */ 4588 dj.obj.objsize = (DWORD)fs->csize * SS(fs); 4589 res = FR_OK; 4590 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */ 4591 if (dcl == 1) res = FR_INT_ERR; 4592 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; 4593 if (res == FR_OK) res = sync_window(fs); /* Flush FAT */ 4594 tm = GET_FATTIME(); 4595 if (res == FR_OK) { /* Initialize the new directory table */ 4596 dsc = clust2sect(fs, dcl); 4597 dir = fs->win; 4598 mem_set(dir, 0, SS(fs)); 4599 if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) { 4600 mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */ 4601 dir[DIR_Name] = '.'; 4602 dir[DIR_Attr] = AM_DIR; 4603 st_dword(dir + DIR_ModTime, tm); 4604 st_clust(fs, dir, dcl); 4605 mem_cpy(dir + SZDIRE, dir, SZDIRE); /* Create ".." entry */ 4606 dir[SZDIRE + 1] = '.'; pcl = dj.obj.sclust; 4607 if (fs->fs_type == FS_FAT32 && pcl == fs->dirbase) pcl = 0; 4608 st_clust(fs, dir + SZDIRE, pcl); 4609 } 4610 for (n = fs->csize; n; n--) { /* Write dot entries and clear following sectors */ 4611 fs->winsect = dsc++; 4612 fs->wflag = 1; 4613 res = sync_window(fs); 4614 if (res != FR_OK) break; 4615 mem_set(dir, 0, SS(fs)); 4616 } 4617 } 4618 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */ 4619 if (res == FR_OK) { 4620 #if _FS_EXFAT 4621 if (fs->fs_type == FS_EXFAT) { /* Initialize directory entry block */ 4622 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Created time */ 4623 st_dword(fs->dirbuf + XDIR_FstClus, dcl); /* Table start cluster */ 4624 st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)dj.obj.objsize); /* File size needs to be valid */ 4625 st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)dj.obj.objsize); 4626 fs->dirbuf[XDIR_GenFlags] = 3; /* Initialize the object flag (contiguous) */ 4627 fs->dirbuf[XDIR_Attr] = AM_DIR; /* Attribute */ 4628 res = store_xdir(&dj); 4629 } else 4630 #endif 4631 { 4632 dir = dj.dir; 4633 st_dword(dir + DIR_ModTime, tm); /* Created time */ 4634 st_clust(fs, dir, dcl); /* Table start cluster */ 4635 dir[DIR_Attr] = AM_DIR; /* Attribute */ 4636 fs->wflag = 1; 4637 } 4638 if (res == FR_OK) res = sync_fs(fs); 4639 } else { 4640 remove_chain(&dj.obj, dcl, 0); /* Could not register, remove cluster chain */ 4641 } 4642 } 4643 FREE_NAMBUF(); 4644 } 4645 4646 LEAVE_FF(fs, res); 4647 } 4648 4649 4650 4651 4652 /*-----------------------------------------------------------------------*/ 4653 /* Rename a File/Directory */ 4654 /*-----------------------------------------------------------------------*/ 4655 4656 FRESULT f_rename ( 4657 const TCHAR* path_old, /* Pointer to the object name to be renamed */ 4658 const TCHAR* path_new /* Pointer to the new name */ 4659 ) 4660 { 4661 FRESULT res; 4662 DIR djo, djn; 4663 FATFS *fs; 4664 BYTE buf[_FS_EXFAT ? SZDIRE * 2 : 24], *dir; 4665 DWORD dw; 4666 DEF_NAMBUF 4667 4668 4669 get_ldnumber(&path_new); /* Ignore drive number of new name */ 4670 res = find_volume(&path_old, &fs, FA_WRITE); /* Get logical drive of the old object */ 4671 if (res == FR_OK) { 4672 djo.obj.fs = fs; 4673 INIT_NAMBUF(fs); 4674 res = follow_path(&djo, path_old); /* Check old object */ 4675 if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check validity of name */ 4676 #if _FS_LOCK != 0 4677 if (res == FR_OK) res = chk_lock(&djo, 2); 4678 #endif 4679 if (res == FR_OK) { /* Object to be renamed is found */ 4680 #if _FS_EXFAT 4681 if (fs->fs_type == FS_EXFAT) { /* At exFAT */ 4682 BYTE nf, nn; 4683 WORD nh; 4684 4685 mem_cpy(buf, fs->dirbuf, SZDIRE * 2); /* Save 85+C0 entry of old object */ 4686 mem_cpy(&djn, &djo, sizeof djo); 4687 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */ 4688 if (res == FR_OK) { /* Is new name already in use by any other object? */ 4689 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST; 4690 } 4691 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */ 4692 res = dir_register(&djn); /* Register the new entry */ 4693 if (res == FR_OK) { 4694 nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName]; 4695 nh = ld_word(fs->dirbuf + XDIR_NameHash); 4696 mem_cpy(fs->dirbuf, buf, SZDIRE * 2); 4697 fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn; 4698 st_word(fs->dirbuf + XDIR_NameHash, nh); 4699 /* Start of critical section where any interruption can cause a cross-link */ 4700 res = store_xdir(&djn); 4701 } 4702 } 4703 } else 4704 #endif 4705 { /* At FAT12/FAT16/FAT32 */ 4706 mem_cpy(buf, djo.dir + DIR_Attr, 21); /* Save information about the object except name */ 4707 mem_cpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */ 4708 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */ 4709 if (res == FR_OK) { /* Is new name already in use by any other object? */ 4710 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST; 4711 } 4712 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */ 4713 res = dir_register(&djn); /* Register the new entry */ 4714 if (res == FR_OK) { 4715 dir = djn.dir; /* Copy information about object except name */ 4716 mem_cpy(dir + 13, buf + 2, 19); 4717 dir[DIR_Attr] = buf[0] | AM_ARC; 4718 fs->wflag = 1; 4719 if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) { /* Update .. entry in the sub-directory if needed */ 4720 dw = clust2sect(fs, ld_clust(fs, dir)); 4721 if (!dw) { 4722 res = FR_INT_ERR; 4723 } else { 4724 /* Start of critical section where any interruption can cause a cross-link */ 4725 res = move_window(fs, dw); 4726 dir = fs->win + SZDIRE * 1; /* Ptr to .. entry */ 4727 if (res == FR_OK && dir[1] == '.') { 4728 st_clust(fs, dir, djn.obj.sclust); 4729 fs->wflag = 1; 4730 } 4731 } 4732 } 4733 } 4734 } 4735 } 4736 if (res == FR_OK) { 4737 res = dir_remove(&djo); /* Remove old entry */ 4738 if (res == FR_OK) { 4739 res = sync_fs(fs); 4740 } 4741 } 4742 /* End of critical section */ 4743 } 4744 FREE_NAMBUF(); 4745 } 4746 4747 LEAVE_FF(fs, res); 4748 } 4749 4750 #endif /* !_FS_READONLY */ 4751 #endif /* _FS_MINIMIZE == 0 */ 4752 #endif /* _FS_MINIMIZE <= 1 */ 4753 #endif /* _FS_MINIMIZE <= 2 */ 4754 4755 4756 4757 #if _USE_CHMOD && !_FS_READONLY 4758 /*-----------------------------------------------------------------------*/ 4759 /* Change Attribute */ 4760 /*-----------------------------------------------------------------------*/ 4761 4762 FRESULT f_chmod ( 4763 const TCHAR* path, /* Pointer to the file path */ 4764 BYTE attr, /* Attribute bits */ 4765 BYTE mask /* Attribute mask to change */ 4766 ) 4767 { 4768 FRESULT res; 4769 DIR dj; 4770 FATFS *fs; 4771 DEF_NAMBUF 4772 4773 4774 res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */ 4775 dj.obj.fs = fs; 4776 if (res == FR_OK) { 4777 INIT_NAMBUF(fs); 4778 res = follow_path(&dj, path); /* Follow the file path */ 4779 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */ 4780 if (res == FR_OK) { 4781 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ 4782 #if _FS_EXFAT 4783 if (fs->fs_type == FS_EXFAT) { 4784 fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 4785 res = store_xdir(&dj); 4786 } else 4787 #endif 4788 { 4789 dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 4790 fs->wflag = 1; 4791 } 4792 if (res == FR_OK) res = sync_fs(fs); 4793 } 4794 FREE_NAMBUF(); 4795 } 4796 4797 LEAVE_FF(fs, res); 4798 } 4799 4800 4801 4802 4803 /*-----------------------------------------------------------------------*/ 4804 /* Change Timestamp */ 4805 /*-----------------------------------------------------------------------*/ 4806 4807 FRESULT f_utime ( 4808 const TCHAR* path, /* Pointer to the file/directory name */ 4809 const FILINFO* fno /* Pointer to the time stamp to be set */ 4810 ) 4811 { 4812 FRESULT res; 4813 DIR dj; 4814 FATFS *fs; 4815 DEF_NAMBUF 4816 4817 4818 res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */ 4819 dj.obj.fs = fs; 4820 if (res == FR_OK) { 4821 INIT_NAMBUF(fs); 4822 res = follow_path(&dj, path); /* Follow the file path */ 4823 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */ 4824 if (res == FR_OK) { 4825 #if _FS_EXFAT 4826 if (fs->fs_type == FS_EXFAT) { 4827 st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime); 4828 res = store_xdir(&dj); 4829 } else 4830 #endif 4831 { 4832 st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime); 4833 fs->wflag = 1; 4834 } 4835 if (res == FR_OK) res = sync_fs(fs); 4836 } 4837 FREE_NAMBUF(); 4838 } 4839 4840 LEAVE_FF(fs, res); 4841 } 4842 4843 #endif /* _USE_CHMOD && !_FS_READONLY */ 4844 4845 4846 4847 #if _USE_LABEL 4848 /*-----------------------------------------------------------------------*/ 4849 /* Get Volume Label */ 4850 /*-----------------------------------------------------------------------*/ 4851 4852 FRESULT f_getlabel ( 4853 const TCHAR* path, /* Path name of the logical drive number */ 4854 TCHAR* label, /* Pointer to a buffer to return the volume label */ 4855 DWORD* vsn /* Pointer to a variable to return the volume serial number */ 4856 ) 4857 { 4858 FRESULT res; 4859 DIR dj; 4860 FATFS *fs; 4861 UINT si, di; 4862 #if _LFN_UNICODE || _FS_EXFAT 4863 WCHAR w; 4864 #endif 4865 4866 /* Get logical drive */ 4867 res = find_volume(&path, &fs, 0); 4868 4869 /* Get volume label */ 4870 if (res == FR_OK && label) { 4871 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */ 4872 res = dir_sdi(&dj, 0); 4873 if (res == FR_OK) { 4874 res = dir_read(&dj, 1); /* Find a volume label entry */ 4875 if (res == FR_OK) { 4876 #if _FS_EXFAT 4877 if (fs->fs_type == FS_EXFAT) { 4878 for (si = di = 0; si < dj.dir[XDIR_NumLabel]; si++) { /* Extract volume label from 83 entry */ 4879 w = ld_word(dj.dir + XDIR_Label + si * 2); 4880 #if _LFN_UNICODE 4881 label[di++] = w; 4882 #else 4883 w = ff_convert(w, 0); /* Unicode -> OEM */ 4884 if (w == 0) w = '?'; /* Replace wrong character */ 4885 if (_DF1S && w >= 0x100) label[di++] = (char)(w >> 8); 4886 label[di++] = (char)w; 4887 #endif 4888 } 4889 label[di] = 0; 4890 } else 4891 #endif 4892 { 4893 si = di = 0; /* Extract volume label from AM_VOL entry with code comversion */ 4894 do { 4895 #if _LFN_UNICODE 4896 w = (si < 11) ? dj.dir[si++] : ' '; 4897 if (IsDBCS1(w) && si < 11 && IsDBCS2(dj.dir[si])) { 4898 w = w << 8 | dj.dir[si++]; 4899 } 4900 label[di++] = ff_convert(w, 1); /* OEM -> Unicode */ 4901 #else 4902 label[di++] = dj.dir[si++]; 4903 #endif 4904 } while (di < 11); 4905 do { /* Truncate trailing spaces */ 4906 label[di] = 0; 4907 if (di == 0) break; 4908 } while (label[--di] == ' '); 4909 } 4910 } 4911 } 4912 if (res == FR_NO_FILE) { /* No label entry and return nul string */ 4913 label[0] = 0; 4914 res = FR_OK; 4915 } 4916 } 4917 4918 /* Get volume serial number */ 4919 if (res == FR_OK && vsn) { 4920 res = move_window(fs, fs->volbase); 4921 if (res == FR_OK) { 4922 switch (fs->fs_type) { 4923 case FS_EXFAT: di = BPB_VolIDEx; break; 4924 case FS_FAT32: di = BS_VolID32; break; 4925 default: di = BS_VolID; 4926 } 4927 *vsn = ld_dword(fs->win + di); 4928 } 4929 } 4930 4931 LEAVE_FF(fs, res); 4932 } 4933 4934 4935 4936 #if !_FS_READONLY 4937 /*-----------------------------------------------------------------------*/ 4938 /* Set Volume Label */ 4939 /*-----------------------------------------------------------------------*/ 4940 4941 FRESULT f_setlabel ( 4942 const TCHAR* label /* Pointer to the volume label to set */ 4943 ) 4944 { 4945 FRESULT res; 4946 DIR dj; 4947 FATFS *fs; 4948 BYTE dirvn[22]; 4949 UINT i, j, slen; 4950 WCHAR w; 4951 static const char badchr[] = "\"*+,.:;<=>\?[]|\x7F"; 4952 4953 4954 /* Get logical drive */ 4955 res = find_volume(&label, &fs, FA_WRITE); 4956 if (res != FR_OK) LEAVE_FF(fs, res); 4957 dj.obj.fs = fs; 4958 4959 /* Get length of given volume label */ 4960 for (slen = 0; (UINT)label[slen] >= ' '; slen++) ; /* Get name length */ 4961 4962 #if _FS_EXFAT 4963 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 4964 for (i = j = 0; i < slen; ) { /* Create volume label in directory form */ 4965 w = label[i++]; 4966 #if !_LFN_UNICODE 4967 if (IsDBCS1(w)) { 4968 w = (i < slen && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0; 4969 } 4970 w = ff_convert(w, 1); 4971 #endif 4972 if (w == 0 || chk_chr(badchr, w) || j == 22) { /* Check validity check validity of the volume label */ 4973 LEAVE_FF(fs, FR_INVALID_NAME); 4974 } 4975 st_word(dirvn + j, w); j += 2; 4976 } 4977 slen = j; 4978 } else 4979 #endif 4980 { /* On the FAT12/16/32 volume */ 4981 for ( ; slen && label[slen - 1] == ' '; slen--) ; /* Remove trailing spaces */ 4982 if (slen) { /* Is there a volume label to be set? */ 4983 dirvn[0] = 0; i = j = 0; /* Create volume label in directory form */ 4984 do { 4985 #if _LFN_UNICODE 4986 w = ff_convert(ff_wtoupper(label[i++]), 0); 4987 #else 4988 w = (BYTE)label[i++]; 4989 if (IsDBCS1(w)) { 4990 w = (j < 10 && i < slen && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0; 4991 } 4992 #if _USE_LFN != 0 4993 w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0); 4994 #else 4995 if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */ 4996 #ifdef _EXCVT 4997 if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */ 4998 #else 4999 if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */ 5000 #endif 5001 #endif 5002 #endif 5003 if (w == 0 || chk_chr(badchr, w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) { /* Reject invalid characters for volume label */ 5004 LEAVE_FF(fs, FR_INVALID_NAME); 5005 } 5006 if (w >= 0x100) dirvn[j++] = (BYTE)(w >> 8); 5007 dirvn[j++] = (BYTE)w; 5008 } while (i < slen); 5009 while (j < 11) dirvn[j++] = ' '; /* Fill remaining name field */ 5010 if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */ 5011 } 5012 } 5013 5014 /* Set volume label */ 5015 dj.obj.sclust = 0; /* Open root directory */ 5016 res = dir_sdi(&dj, 0); 5017 if (res == FR_OK) { 5018 res = dir_read(&dj, 1); /* Get volume label entry */ 5019 if (res == FR_OK) { 5020 if (_FS_EXFAT && fs->fs_type == FS_EXFAT) { 5021 dj.dir[XDIR_NumLabel] = (BYTE)(slen / 2); /* Change the volume label */ 5022 mem_cpy(dj.dir + XDIR_Label, dirvn, slen); 5023 } else { 5024 if (slen) { 5025 mem_cpy(dj.dir, dirvn, 11); /* Change the volume label */ 5026 } else { 5027 dj.dir[DIR_Name] = DDEM; /* Remove the volume label */ 5028 } 5029 } 5030 fs->wflag = 1; 5031 res = sync_fs(fs); 5032 } else { /* No volume label entry is found or error */ 5033 if (res == FR_NO_FILE) { 5034 res = FR_OK; 5035 if (slen) { /* Create a volume label entry */ 5036 res = dir_alloc(&dj, 1); /* Allocate an entry */ 5037 if (res == FR_OK) { 5038 mem_set(dj.dir, 0, SZDIRE); /* Clear the entry */ 5039 if (_FS_EXFAT && fs->fs_type == FS_EXFAT) { 5040 dj.dir[XDIR_Type] = 0x83; /* Create 83 entry */ 5041 dj.dir[XDIR_NumLabel] = (BYTE)(slen / 2); 5042 mem_cpy(dj.dir + XDIR_Label, dirvn, slen); 5043 } else { 5044 dj.dir[DIR_Attr] = AM_VOL; /* Create volume label entry */ 5045 mem_cpy(dj.dir, dirvn, 11); 5046 } 5047 fs->wflag = 1; 5048 res = sync_fs(fs); 5049 } 5050 } 5051 } 5052 } 5053 } 5054 5055 LEAVE_FF(fs, res); 5056 } 5057 5058 #endif /* !_FS_READONLY */ 5059 #endif /* _USE_LABEL */ 5060 5061 5062 5063 #if _USE_EXPAND && !_FS_READONLY 5064 /*-----------------------------------------------------------------------*/ 5065 /* Allocate a Contiguous Blocks to the File */ 5066 /*-----------------------------------------------------------------------*/ 5067 5068 FRESULT f_expand ( 5069 FIL* fp, /* Pointer to the file object */ 5070 FSIZE_t fsz, /* File size to be expanded to */ 5071 BYTE opt /* Operation mode 0:Find and prepare or 1:Find and allocate */ 5072 ) 5073 { 5074 FRESULT res; 5075 FATFS *fs; 5076 DWORD n, clst, stcl, scl, ncl, tcl, lclst; 5077 5078 5079 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 5080 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); 5081 if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); 5082 #if _FS_EXFAT 5083 if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED); /* Check if in size limit */ 5084 #endif 5085 n = (DWORD)fs->csize * SS(fs); /* Cluster size */ 5086 tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0); /* Number of clusters required */ 5087 stcl = fs->last_clst; lclst = 0; 5088 if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2; 5089 5090 #if _FS_EXFAT 5091 if (fs->fs_type == FS_EXFAT) { 5092 scl = find_bitmap(fs, stcl, tcl); /* Find a contiguous cluster block */ 5093 if (scl == 0) res = FR_DENIED; /* No contiguous cluster block was found */ 5094 if (scl == 0xFFFFFFFF) res = FR_DISK_ERR; 5095 if (res == FR_OK) { 5096 if (opt) { 5097 res = change_bitmap(fs, scl, tcl, 1); /* Mark the cluster block 'in use' */ 5098 lclst = scl + tcl - 1; 5099 } else { 5100 lclst = scl - 1; 5101 } 5102 } 5103 } else 5104 #endif 5105 { 5106 scl = clst = stcl; ncl = 0; 5107 for (;;) { /* Find a contiguous cluster block */ 5108 n = get_fat(&fp->obj, clst); 5109 if (++clst >= fs->n_fatent) clst = 2; 5110 if (n == 1) { res = FR_INT_ERR; break; } 5111 if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 5112 if (n == 0) { /* Is it a free cluster? */ 5113 if (++ncl == tcl) break; /* Break if a contiguous cluster block is found */ 5114 } else { 5115 scl = clst; ncl = 0; /* Not a free cluster */ 5116 } 5117 if (clst == stcl) { res = FR_DENIED; break; } /* No contiguous cluster? */ 5118 } 5119 if (res == FR_OK) { 5120 if (opt) { 5121 for (clst = scl, n = tcl; n; clst++, n--) { /* Create a cluster chain on the FAT */ 5122 res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1); 5123 if (res != FR_OK) break; 5124 lclst = clst; 5125 } 5126 } else { 5127 lclst = scl - 1; 5128 } 5129 } 5130 } 5131 5132 if (res == FR_OK) { 5133 fs->last_clst = lclst; /* Set suggested start cluster to start next */ 5134 if (opt) { 5135 fp->obj.sclust = scl; /* Update object allocation information */ 5136 fp->obj.objsize = fsz; 5137 if (_FS_EXFAT) fp->obj.stat = 2; /* Set status 'contiguous chain' */ 5138 fp->flag |= FA_MODIFIED; 5139 if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */ 5140 fs->free_clst -= tcl; 5141 fs->fsi_flag |= 1; 5142 } 5143 } 5144 } 5145 5146 LEAVE_FF(fs, res); 5147 } 5148 5149 #endif /* _USE_EXPAND && !_FS_READONLY */ 5150 5151 5152 5153 #if _USE_FORWARD 5154 /*-----------------------------------------------------------------------*/ 5155 /* Forward data to the stream directly */ 5156 /*-----------------------------------------------------------------------*/ 5157 5158 FRESULT f_forward ( 5159 FIL* fp, /* Pointer to the file object */ 5160 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ 5161 UINT btf, /* Number of bytes to forward */ 5162 UINT* bf /* Pointer to number of bytes forwarded */ 5163 ) 5164 { 5165 FRESULT res; 5166 FATFS *fs; 5167 DWORD clst, sect; 5168 FSIZE_t remain; 5169 UINT rcnt, csect; 5170 BYTE *dbuf; 5171 5172 5173 *bf = 0; /* Clear transfer byte counter */ 5174 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 5175 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); 5176 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 5177 5178 remain = fp->obj.objsize - fp->fptr; 5179 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */ 5180 5181 for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream goes busy */ 5182 fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) { 5183 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */ 5184 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ 5185 if (csect == 0) { /* On the cluster boundary? */ 5186 clst = (fp->fptr == 0) ? /* On the top of the file? */ 5187 fp->obj.sclust : get_fat(&fp->obj, fp->clust); 5188 if (clst <= 1) ABORT(fs, FR_INT_ERR); 5189 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 5190 fp->clust = clst; /* Update current cluster */ 5191 } 5192 } 5193 sect = clust2sect(fs, fp->clust); /* Get current data sector */ 5194 if (!sect) ABORT(fs, FR_INT_ERR); 5195 sect += csect; 5196 #if _FS_TINY 5197 if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window to the file data */ 5198 dbuf = fs->win; 5199 #else 5200 if (fp->sect != sect) { /* Fill sector cache with file data */ 5201 #if !_FS_READONLY 5202 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 5203 if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 5204 fp->flag &= (BYTE)~FA_DIRTY; 5205 } 5206 #endif 5207 if (disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 5208 } 5209 dbuf = fp->buf; 5210 #endif 5211 fp->sect = sect; 5212 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */ 5213 if (rcnt > btf) rcnt = btf; /* Clip it by btr if needed */ 5214 rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt); /* Forward the file data */ 5215 if (!rcnt) ABORT(fs, FR_INT_ERR); 5216 } 5217 5218 LEAVE_FF(fs, FR_OK); 5219 } 5220 #endif /* _USE_FORWARD */ 5221 5222 5223 5224 #if _USE_MKFS && !_FS_READONLY 5225 /*-----------------------------------------------------------------------*/ 5226 /* Create FAT file system on the logical drive */ 5227 /*-----------------------------------------------------------------------*/ 5228 5229 FRESULT f_mkfs ( 5230 const TCHAR* path, /* Logical drive number */ 5231 BYTE opt, /* Format option */ 5232 DWORD au, /* Size of allocation unit [byte] */ 5233 void* work, /* Pointer to working buffer */ 5234 UINT len /* Size of working buffer */ 5235 ) 5236 { 5237 const UINT n_fats = 1; /* Number of FATs for FAT12/16/32 volume (1 or 2) */ 5238 const UINT n_rootdir = 512; /* Number of root directory entries for FAT12/16 volume */ 5239 static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0}; /* Cluster size boundary for FAT12/16 volume (4Ks unit) */ 5240 static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0}; /* Cluster size boundary for FAT32 volume (128Ks unit) */ 5241 BYTE fmt, sys, *buf, *pte, pdrv, part; 5242 WORD ss; 5243 DWORD szb_buf, sz_buf, sz_blk, n_clst, pau, sect, nsect, n; 5244 DWORD b_vol, b_fat, b_data; /* Base LBA for volume, fat, data */ 5245 DWORD sz_vol, sz_rsv, sz_fat, sz_dir; /* Size for volume, fat, dir, data */ 5246 UINT i; 5247 int vol; 5248 DSTATUS stat; 5249 #if _USE_TRIM || _FS_EXFAT 5250 DWORD tbl[3]; 5251 #endif 5252 5253 5254 /* Check mounted drive and clear work area */ 5255 vol = get_ldnumber(&path); /* Get target logical drive */ 5256 if (vol < 0) return FR_INVALID_DRIVE; 5257 if (FatFs[vol]) FatFs[vol]->fs_type = 0; /* Clear mounted volume */ 5258 pdrv = LD2PD(vol); /* Physical drive */ 5259 part = LD2PT(vol); /* Partition (0:create as new, 1-4:get from partition table) */ 5260 5261 /* Check physical drive status */ 5262 stat = disk_initialize(pdrv); 5263 if (stat & STA_NOINIT) return FR_NOT_READY; 5264 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 5265 if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &sz_blk) != RES_OK || !sz_blk || sz_blk > 32768 || (sz_blk & (sz_blk - 1))) sz_blk = 1; /* Erase block to align data area */ 5266 #if _MAX_SS != _MIN_SS /* Get sector size of the medium */ 5267 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR; 5268 if (ss > _MAX_SS || ss < _MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR; 5269 #else 5270 ss = _MAX_SS; 5271 #endif 5272 if ((au != 0 && au < ss) || au > 0x1000000 || (au & (au - 1))) return FR_INVALID_PARAMETER; /* Check if au is valid */ 5273 au /= ss; /* Cluster size in unit of sector */ 5274 5275 /* Get working buffer */ 5276 buf = (BYTE*)work; /* Working buffer */ 5277 sz_buf = len / ss; /* Size of working buffer (sector) */ 5278 szb_buf = sz_buf * ss; /* Size of working buffer (byte) */ 5279 if (!szb_buf) return FR_MKFS_ABORTED; 5280 5281 /* Determine where the volume to be located (b_vol, sz_vol) */ 5282 if (_MULTI_PARTITION && part != 0) { 5283 /* Get partition information from partition table in the MBR */ 5284 if (disk_read(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Load MBR */ 5285 if (ld_word(buf + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED; /* Check if MBR is valid */ 5286 pte = buf + (MBR_Table + (part - 1) * SZ_PTE); 5287 if (!pte[PTE_System]) return FR_MKFS_ABORTED; /* No partition? */ 5288 b_vol = ld_dword(pte + PTE_StLba); /* Get volume start sector */ 5289 sz_vol = ld_dword(pte + PTE_SizLba); /* Get volume size */ 5290 } else { 5291 /* Create a single-partition in this function */ 5292 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) return FR_DISK_ERR; 5293 b_vol = (opt & FM_SFD) ? 0 : 63; /* Volume start sector */ 5294 if (sz_vol < b_vol) return FR_MKFS_ABORTED; 5295 sz_vol -= b_vol; /* Volume size */ 5296 } 5297 if (sz_vol < 128) return FR_MKFS_ABORTED; /* Check if volume size is >=128s */ 5298 5299 /* Pre-determine the FAT type */ 5300 do { 5301 if (_FS_EXFAT && (opt & FM_EXFAT)) { /* exFAT possible? */ 5302 if ((opt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || au > 128) { /* exFAT only, vol >= 64Ms or au > 128s ? */ 5303 fmt = FS_EXFAT; break; 5304 } 5305 } 5306 if (au > 128) return FR_INVALID_PARAMETER; /* Too large au for FAT/FAT32 */ 5307 if (opt & FM_FAT32) { /* FAT32 possible? */ 5308 if ((opt & FM_ANY) == FM_FAT32 || !(opt & FM_FAT)) { /* FAT32 only or no-FAT? */ 5309 fmt = FS_FAT32; break; 5310 } 5311 } 5312 if (!(opt & FM_FAT)) return FR_INVALID_PARAMETER; /* no-FAT? */ 5313 fmt = FS_FAT16; 5314 } while (0); 5315 5316 #if _FS_EXFAT 5317 if (fmt == FS_EXFAT) { /* Create an exFAT volume */ 5318 DWORD szb_bit, szb_case, sum, nb, cl; 5319 WCHAR ch, si; 5320 UINT j, st; 5321 BYTE b; 5322 5323 if (sz_vol < 0x1000) return FR_MKFS_ABORTED; /* Too small volume? */ 5324 #if _USE_TRIM 5325 tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area can be erased */ 5326 disk_ioctl(pdrv, CTRL_TRIM, tbl); 5327 #endif 5328 /* Determine FAT location, data location and number of clusters */ 5329 if (!au) { /* au auto-selection */ 5330 au = 8; 5331 if (sz_vol >= 0x80000) au = 64; /* >= 512Ks */ 5332 if (sz_vol >= 0x4000000) au = 256; /* >= 64Ms */ 5333 } 5334 b_fat = b_vol + 32; /* FAT start at offset 32 */ 5335 sz_fat = ((sz_vol / au + 2) * 4 + ss - 1) / ss; /* Number of FAT sectors */ 5336 b_data = (b_fat + sz_fat + sz_blk - 1) & ~(sz_blk - 1); /* Align data area to the erase block boundary */ 5337 if (b_data >= sz_vol / 2) return FR_MKFS_ABORTED; /* Too small volume? */ 5338 n_clst = (sz_vol - (b_data - b_vol)) / au; /* Number of clusters */ 5339 if (n_clst <16) return FR_MKFS_ABORTED; /* Too few clusters? */ 5340 if (n_clst > MAX_EXFAT) return FR_MKFS_ABORTED; /* Too many clusters? */ 5341 5342 szb_bit = (n_clst + 7) / 8; /* Size of allocation bitmap */ 5343 tbl[0] = (szb_bit + au * ss - 1) / (au * ss); /* Number of allocation bitmap clusters */ 5344 5345 /* Create a compressed up-case table */ 5346 sect = b_data + au * tbl[0]; /* Table start sector */ 5347 sum = 0; /* Table checksum to be stored in the 82 entry */ 5348 st = si = i = j = szb_case = 0; 5349 do { 5350 switch (st) { 5351 case 0: 5352 ch = ff_wtoupper(si); /* Get an up-case char */ 5353 if (ch != si) { 5354 si++; break; /* Store the up-case char if exist */ 5355 } 5356 for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ; /* Get run length of no-case block */ 5357 if (j >= 128) { 5358 ch = 0xFFFF; st = 2; break; /* Compress the no-case block if run is >= 128 */ 5359 } 5360 st = 1; /* Do not compress short run */ 5361 /* continue */ 5362 case 1: 5363 ch = si++; /* Fill the short run */ 5364 if (--j == 0) st = 0; 5365 break; 5366 default: 5367 ch = (WCHAR)j; si += j; /* Number of chars to skip */ 5368 st = 0; 5369 } 5370 sum = xsum32(buf[i + 0] = (BYTE)ch, sum); /* Put it into the write buffer */ 5371 sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum); 5372 i += 2; szb_case += 2; 5373 if (!si || i == szb_buf) { /* Write buffered data when buffer full or end of process */ 5374 n = (i + ss - 1) / ss; 5375 if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR; 5376 sect += n; i = 0; 5377 } 5378 } while (si); 5379 tbl[1] = (szb_case + au * ss - 1) / (au * ss); /* Number of up-case table clusters */ 5380 tbl[2] = 1; /* Number of root dir clusters */ 5381 5382 /* Initialize the allocation bitmap */ 5383 sect = b_data; nsect = (szb_bit + ss - 1) / ss; /* Start of bitmap and number of sectors */ 5384 nb = tbl[0] + tbl[1] + tbl[2]; /* Number of clusters in-use by system */ 5385 do { 5386 mem_set(buf, 0, szb_buf); 5387 for (i = 0; nb >= 8 && i < szb_buf; buf[i++] = 0xFF, nb -= 8) ; 5388 for (b = 1; nb && i < szb_buf; buf[i] |= b, b <<= 1, nb--) ; 5389 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */ 5390 if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR; 5391 sect += n; nsect -= n; 5392 } while (nsect); 5393 5394 /* Initialize the FAT */ 5395 sect = b_fat; nsect = sz_fat; /* Start of FAT and number of FAT sectors */ 5396 j = nb = cl = 0; 5397 do { 5398 mem_set(buf, 0, szb_buf); i = 0; /* Clear work area and reset write index */ 5399 if (cl == 0) { /* Set entry 0 and 1 */ 5400 st_dword(buf + i, 0xFFFFFFF8); i += 4; cl++; 5401 st_dword(buf + i, 0xFFFFFFFF); i += 4; cl++; 5402 } 5403 do { /* Create chains of bitmap, up-case and root dir */ 5404 while (nb && i < szb_buf) { /* Create a chain */ 5405 st_dword(buf + i, (nb > 1) ? cl + 1 : 0xFFFFFFFF); 5406 i += 4; cl++; nb--; 5407 } 5408 if (!nb && j < 3) nb = tbl[j++]; /* Next chain */ 5409 } while (nb && i < szb_buf); 5410 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */ 5411 if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR; 5412 sect += n; nsect -= n; 5413 } while (nsect); 5414 5415 /* Initialize the root directory */ 5416 mem_set(buf, 0, szb_buf); 5417 buf[SZDIRE * 0 + 0] = 0x83; /* 83 entry (volume label) */ 5418 buf[SZDIRE * 1 + 0] = 0x81; /* 81 entry (allocation bitmap) */ 5419 st_dword(buf + SZDIRE * 1 + 20, 2); 5420 st_dword(buf + SZDIRE * 1 + 24, szb_bit); 5421 buf[SZDIRE * 2 + 0] = 0x82; /* 82 entry (up-case table) */ 5422 st_dword(buf + SZDIRE * 2 + 4, sum); 5423 st_dword(buf + SZDIRE * 2 + 20, 2 + tbl[0]); 5424 st_dword(buf + SZDIRE * 2 + 24, szb_case); 5425 sect = b_data + au * (tbl[0] + tbl[1]); nsect = au; /* Start of the root directory and number of sectors */ 5426 do { /* Fill root directory sectors */ 5427 n = (nsect > sz_buf) ? sz_buf : nsect; 5428 if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR; 5429 mem_set(buf, 0, ss); 5430 sect += n; nsect -= n; 5431 } while (nsect); 5432 5433 /* Create two set of the exFAT VBR blocks */ 5434 sect = b_vol; 5435 for (n = 0; n < 2; n++) { 5436 /* Main record (+0) */ 5437 mem_set(buf, 0, ss); 5438 mem_cpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11); /* Boot jump code (x86), OEM name */ 5439 st_dword(buf + BPB_VolOfsEx, b_vol); /* Volume offset in the physical drive [sector] */ 5440 st_dword(buf + BPB_TotSecEx, sz_vol); /* Volume size [sector] */ 5441 st_dword(buf + BPB_FatOfsEx, b_fat - b_vol); /* FAT offset [sector] */ 5442 st_dword(buf + BPB_FatSzEx, sz_fat); /* FAT size [sector] */ 5443 st_dword(buf + BPB_DataOfsEx, b_data - b_vol); /* Data offset [sector] */ 5444 st_dword(buf + BPB_NumClusEx, n_clst); /* Number of clusters */ 5445 st_dword(buf + BPB_RootClusEx, 2 + tbl[0] + tbl[1]); /* Root dir cluster # */ 5446 st_dword(buf + BPB_VolIDEx, GET_FATTIME()); /* VSN */ 5447 st_word(buf + BPB_FSVerEx, 0x100); /* File system version (1.00) */ 5448 for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ; /* Log2 of sector size [byte] */ 5449 for (buf[BPB_SecPerClusEx] = 0, i = au; i >>= 1; buf[BPB_SecPerClusEx]++) ; /* Log2 of cluster size [sector] */ 5450 buf[BPB_NumFATsEx] = 1; /* Number of FATs */ 5451 buf[BPB_DrvNumEx] = 0x80; /* Drive number (for int13) */ 5452 st_word(buf + BS_BootCodeEx, 0xFEEB); /* Boot code (x86) */ 5453 st_word(buf + BS_55AA, 0xAA55); /* Signature (placed here regardless of sector size) */ 5454 for (i = sum = 0; i < ss; i++) { /* VBR checksum */ 5455 if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum); 5456 } 5457 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR; 5458 /* Extended bootstrap record (+1..+8) */ 5459 mem_set(buf, 0, ss); 5460 st_word(buf + ss - 2, 0xAA55); /* Signature (placed at end of sector) */ 5461 for (j = 1; j < 9; j++) { 5462 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */ 5463 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR; 5464 } 5465 /* OEM/Reserved record (+9..+10) */ 5466 mem_set(buf, 0, ss); 5467 for ( ; j < 11; j++) { 5468 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */ 5469 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR; 5470 } 5471 /* Sum record (+11) */ 5472 for (i = 0; i < ss; i += 4) st_dword(buf + i, sum); /* Fill with checksum value */ 5473 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR; 5474 } 5475 5476 } else 5477 #endif /* _FS_EXFAT */ 5478 { /* Create an FAT12/16/32 volume */ 5479 do { 5480 pau = au; 5481 /* Pre-determine number of clusters and FAT sub-type */ 5482 if (fmt == FS_FAT32) { /* FAT32 volume */ 5483 if (!pau) { /* au auto-selection */ 5484 n = sz_vol / 0x20000; /* Volume size in unit of 128KS */ 5485 for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ; /* Get from table */ 5486 } 5487 n_clst = sz_vol / pau; /* Number of clusters */ 5488 sz_fat = (n_clst * 4 + 8 + ss - 1) / ss; /* FAT size [sector] */ 5489 sz_rsv = 32; /* Number of reserved sectors */ 5490 sz_dir = 0; /* No static directory */ 5491 if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) return FR_MKFS_ABORTED; 5492 } else { /* FAT12/16 volume */ 5493 if (!pau) { /* au auto-selection */ 5494 n = sz_vol / 0x1000; /* Volume size in unit of 4KS */ 5495 for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ; /* Get from table */ 5496 } 5497 n_clst = sz_vol / pau; 5498 if (n_clst > MAX_FAT12) { 5499 n = n_clst * 2 + 4; /* FAT size [byte] */ 5500 } else { 5501 fmt = FS_FAT12; 5502 n = (n_clst * 3 + 1) / 2 + 3; /* FAT size [byte] */ 5503 } 5504 sz_fat = (n + ss - 1) / ss; /* FAT size [sector] */ 5505 sz_rsv = 1; /* Number of reserved sectors */ 5506 sz_dir = (DWORD)n_rootdir * SZDIRE / ss; /* Rootdir size [sector] */ 5507 } 5508 b_fat = b_vol + sz_rsv; /* FAT base */ 5509 b_data = b_fat + sz_fat * n_fats + sz_dir; /* Data base */ 5510 5511 /* Align data base to erase block boundary (for flash memory media) */ 5512 n = ((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data; /* Next nearest erase block from current data base */ 5513 if (fmt == FS_FAT32) { /* FAT32: Move FAT base */ 5514 sz_rsv += n; b_fat += n; 5515 } else { /* FAT12/16: Expand FAT size */ 5516 sz_fat += n / n_fats; 5517 } 5518 5519 /* Determine number of clusters and final check of validity of the FAT sub-type */ 5520 if (sz_vol < b_data + pau * 16 - b_vol) return FR_MKFS_ABORTED; /* Too small volume */ 5521 n_clst = (sz_vol - sz_rsv - sz_fat * n_fats - sz_dir) / pau; 5522 if (fmt == FS_FAT32) { 5523 if (n_clst <= MAX_FAT16) { /* Too few clusters for FAT32 */ 5524 if (!au && (au = pau / 2) != 0) continue; /* Adjust cluster size and retry */ 5525 return FR_MKFS_ABORTED; 5526 } 5527 } 5528 if (fmt == FS_FAT16) { 5529 if (n_clst > MAX_FAT16) { /* Too many clusters for FAT16 */ 5530 if (!au && (pau * 2) <= 64) { 5531 au = pau * 2; continue; /* Adjust cluster size and retry */ 5532 } 5533 if ((opt & FM_FAT32)) { 5534 fmt = FS_FAT32; continue; /* Switch type to FAT32 and retry */ 5535 } 5536 if (!au && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */ 5537 return FR_MKFS_ABORTED; 5538 } 5539 if (n_clst <= MAX_FAT12) { /* Too few clusters for FAT16 */ 5540 if (!au && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */ 5541 return FR_MKFS_ABORTED; 5542 } 5543 } 5544 if (fmt == FS_FAT12 && n_clst > MAX_FAT12) return FR_MKFS_ABORTED; /* Too many clusters for FAT12 */ 5545 5546 /* Ok, it is the valid cluster configuration */ 5547 break; 5548 } while (1); 5549 5550 #if _USE_TRIM 5551 tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area can be erased */ 5552 disk_ioctl(pdrv, CTRL_TRIM, tbl); 5553 #endif 5554 /* Create FAT VBR */ 5555 mem_set(buf, 0, ss); 5556 mem_cpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code (x86), OEM name */ 5557 st_word(buf + BPB_BytsPerSec, ss); /* Sector size [byte] */ 5558 buf[BPB_SecPerClus] = (BYTE)pau; /* Cluster size [sector] */ 5559 st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv); /* Size of reserved area */ 5560 buf[BPB_NumFATs] = (BYTE)n_fats; /* Number of FATs */ 5561 st_word(buf + BPB_RootEntCnt, (WORD)((fmt == FS_FAT32) ? 0 : n_rootdir)); /* Number of root directory entries */ 5562 if (sz_vol < 0x10000) { 5563 st_word(buf + BPB_TotSec16, (WORD)sz_vol); /* Volume size in 16-bit LBA */ 5564 } else { 5565 st_dword(buf + BPB_TotSec32, sz_vol); /* Volume size in 32-bit LBA */ 5566 } 5567 buf[BPB_Media] = 0xF8; /* Media descriptor byte */ 5568 st_word(buf + BPB_SecPerTrk, 63); /* Number of sectors per track (for int13) */ 5569 st_word(buf + BPB_NumHeads, 255); /* Number of heads (for int13) */ 5570 st_dword(buf + BPB_HiddSec, b_vol); /* Volume offset in the physical drive [sector] */ 5571 if (fmt == FS_FAT32) { 5572 st_dword(buf + BS_VolID32, GET_FATTIME()); /* VSN */ 5573 st_dword(buf + BPB_FATSz32, sz_fat); /* FAT size [sector] */ 5574 st_dword(buf + BPB_RootClus32, 2); /* Root directory cluster # (2) */ 5575 st_word(buf + BPB_FSInfo32, 1); /* Offset of FSINFO sector (VBR + 1) */ 5576 st_word(buf + BPB_BkBootSec32, 6); /* Offset of backup VBR (VBR + 6) */ 5577 buf[BS_DrvNum32] = 0x80; /* Drive number (for int13) */ 5578 buf[BS_BootSig32] = 0x29; /* Extended boot signature */ 5579 mem_cpy(buf + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ 5580 } else { 5581 st_dword(buf + BS_VolID, GET_FATTIME()); /* VSN */ 5582 st_word(buf + BPB_FATSz16, (WORD)sz_fat); /* FAT size [sector] */ 5583 buf[BS_DrvNum] = 0x80; /* Drive number (for int13) */ 5584 buf[BS_BootSig] = 0x29; /* Extended boot signature */ 5585 mem_cpy(buf + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ 5586 } 5587 st_word(buf + BS_55AA, 0xAA55); /* Signature (offset is fixed here regardless of sector size) */ 5588 if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) return FR_DISK_ERR; /* Write it to the VBR sector */ 5589 5590 /* Create FSINFO record if needed */ 5591 if (fmt == FS_FAT32) { 5592 disk_write(pdrv, buf, b_vol + 6, 1); /* Write backup VBR (VBR + 6) */ 5593 mem_set(buf, 0, ss); 5594 st_dword(buf + FSI_LeadSig, 0x41615252); 5595 st_dword(buf + FSI_StrucSig, 0x61417272); 5596 st_dword(buf + FSI_Free_Count, n_clst - 1); /* Number of free clusters */ 5597 st_dword(buf + FSI_Nxt_Free, 2); /* Last allocated cluster# */ 5598 st_word(buf + BS_55AA, 0xAA55); 5599 disk_write(pdrv, buf, b_vol + 7, 1); /* Write backup FSINFO (VBR + 7) */ 5600 disk_write(pdrv, buf, b_vol + 1, 1); /* Write original FSINFO (VBR + 1) */ 5601 } 5602 5603 /* Initialize FAT area */ 5604 mem_set(buf, 0, (UINT)szb_buf); 5605 sect = b_fat; /* FAT start sector */ 5606 for (i = 0; i < n_fats; i++) { /* Initialize FATs each */ 5607 if (fmt == FS_FAT32) { 5608 st_dword(buf + 0, 0xFFFFFFF8); /* Entry 0 */ 5609 st_dword(buf + 4, 0xFFFFFFFF); /* Entry 1 */ 5610 st_dword(buf + 8, 0x0FFFFFFF); /* Entry 2 (root directory) */ 5611 } else { 5612 st_dword(buf + 0, (fmt == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8); /* Entry 0 and 1 */ 5613 } 5614 nsect = sz_fat; /* Number of FAT sectors */ 5615 do { /* Fill FAT sectors */ 5616 n = (nsect > sz_buf) ? sz_buf : nsect; 5617 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) return FR_DISK_ERR; 5618 mem_set(buf, 0, ss); 5619 sect += n; nsect -= n; 5620 } while (nsect); 5621 } 5622 5623 /* Initialize root directory (fill with zero) */ 5624 nsect = (fmt == FS_FAT32) ? pau : sz_dir; /* Number of root directory sectors */ 5625 do { 5626 n = (nsect > sz_buf) ? sz_buf : nsect; 5627 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) return FR_DISK_ERR; 5628 sect += n; nsect -= n; 5629 } while (nsect); 5630 } 5631 5632 /* Determine system ID in the partition table */ 5633 if (_FS_EXFAT && fmt == FS_EXFAT) { 5634 sys = 0x07; /* HPFS/NTFS/exFAT */ 5635 } else { 5636 if (fmt == FS_FAT32) { 5637 sys = 0x0C; /* FAT32X */ 5638 } else { 5639 if (sz_vol >= 0x10000) { 5640 sys = 0x06; /* FAT12/16 (>=64KS) */ 5641 } else { 5642 sys = (fmt == FS_FAT16) ? 0x04 : 0x01; /* FAT16 (<64KS) : FAT12 (<64KS) */ 5643 } 5644 } 5645 } 5646 5647 if (_MULTI_PARTITION && part != 0) { 5648 /* Update system ID in the partition table */ 5649 if (disk_read(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Read the MBR */ 5650 buf[MBR_Table + (part - 1) * SZ_PTE + PTE_System] = sys; /* Set system type */ 5651 if (disk_write(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Write it back to the MBR */ 5652 } else { 5653 if (!(opt & FM_SFD)) { 5654 /* Create partition table in FDISK format */ 5655 mem_set(buf, 0, ss); 5656 st_word(buf + BS_55AA, 0xAA55); /* MBR signature */ 5657 pte = buf + MBR_Table; /* Create partition table for single partition in the drive */ 5658 pte[PTE_Boot] = 0; /* Boot indicator */ 5659 pte[PTE_StHead] = 1; /* Start head */ 5660 pte[PTE_StSec] = 1; /* Start sector */ 5661 pte[PTE_StCyl] = 0; /* Start cylinder */ 5662 pte[PTE_System] = sys; /* System type */ 5663 n = (b_vol + sz_vol) / (63 * 255); /* (End CHS is incorrect) */ 5664 pte[PTE_EdHead] = 254; /* End head */ 5665 pte[PTE_EdSec] = (BYTE)(n >> 2 | 63); /* End sector */ 5666 pte[PTE_EdCyl] = (BYTE)n; /* End cylinder */ 5667 st_dword(pte + PTE_StLba, b_vol); /* Start offset in LBA */ 5668 st_dword(pte + PTE_SizLba, sz_vol); /* Size in sectors */ 5669 if (disk_write(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Write it to the MBR */ 5670 } 5671 } 5672 5673 if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) return FR_DISK_ERR; 5674 5675 return FR_OK; 5676 } 5677 5678 5679 5680 #if _MULTI_PARTITION 5681 /*-----------------------------------------------------------------------*/ 5682 /* Create partition table on the physical drive */ 5683 /*-----------------------------------------------------------------------*/ 5684 5685 FRESULT f_fdisk ( 5686 BYTE pdrv, /* Physical drive number */ 5687 const DWORD* szt, /* Pointer to the size table for each partitions */ 5688 void* work /* Pointer to the working buffer */ 5689 ) 5690 { 5691 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl; 5692 BYTE s_hd, e_hd, *p, *buf = (BYTE*)work; 5693 DSTATUS stat; 5694 DWORD sz_disk, sz_part, s_part; 5695 5696 5697 stat = disk_initialize(pdrv); 5698 if (stat & STA_NOINIT) return FR_NOT_READY; 5699 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 5700 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR; 5701 5702 /* Determine the CHS without any care of the drive geometry */ 5703 for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ; 5704 if (n == 256) n--; 5705 e_hd = n - 1; 5706 sz_cyl = 63 * n; 5707 tot_cyl = sz_disk / sz_cyl; 5708 5709 /* Create partition table */ 5710 mem_set(buf, 0, _MAX_SS); 5711 p = buf + MBR_Table; b_cyl = 0; 5712 for (i = 0; i < 4; i++, p += SZ_PTE) { 5713 p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl; 5714 if (!p_cyl) continue; 5715 s_part = (DWORD)sz_cyl * b_cyl; 5716 sz_part = (DWORD)sz_cyl * p_cyl; 5717 if (i == 0) { /* Exclude first track of cylinder 0 */ 5718 s_hd = 1; 5719 s_part += 63; sz_part -= 63; 5720 } else { 5721 s_hd = 0; 5722 } 5723 e_cyl = b_cyl + p_cyl - 1; 5724 if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER; 5725 5726 /* Set partition table */ 5727 p[1] = s_hd; /* Start head */ 5728 p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */ 5729 p[3] = (BYTE)b_cyl; /* Start cylinder */ 5730 p[4] = 0x06; /* System type (temporary setting) */ 5731 p[5] = e_hd; /* End head */ 5732 p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */ 5733 p[7] = (BYTE)e_cyl; /* End cylinder */ 5734 st_dword(p + 8, s_part); /* Start sector in LBA */ 5735 st_dword(p + 12, sz_part); /* Partition size */ 5736 5737 /* Next partition */ 5738 b_cyl += p_cyl; 5739 } 5740 st_word(p, 0xAA55); 5741 5742 /* Write it to the MBR */ 5743 return (disk_write(pdrv, buf, 0, 1) != RES_OK || disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK; 5744 } 5745 5746 #endif /* _MULTI_PARTITION */ 5747 #endif /* _USE_MKFS && !_FS_READONLY */ 5748 5749 5750 5751 5752 #if _USE_STRFUNC 5753 /*-----------------------------------------------------------------------*/ 5754 /* Get a string from the file */ 5755 /*-----------------------------------------------------------------------*/ 5756 5757 TCHAR* f_gets ( 5758 TCHAR* buff, /* Pointer to the string buffer to read */ 5759 int len, /* Size of string buffer (characters) */ 5760 FIL* fp /* Pointer to the file object */ 5761 ) 5762 { 5763 int n = 0; 5764 TCHAR c, *p = buff; 5765 BYTE s[2]; 5766 UINT rc; 5767 5768 5769 while (n < len - 1) { /* Read characters until buffer gets filled */ 5770 #if _LFN_UNICODE 5771 #if _STRF_ENCODE == 3 /* Read a character in UTF-8 */ 5772 f_read(fp, s, 1, &rc); 5773 if (rc != 1) break; 5774 c = s[0]; 5775 if (c >= 0x80) { 5776 if (c < 0xC0) continue; /* Skip stray trailer */ 5777 if (c < 0xE0) { /* Two-byte sequence */ 5778 f_read(fp, s, 1, &rc); 5779 if (rc != 1) break; 5780 c = (c & 0x1F) << 6 | (s[0] & 0x3F); 5781 if (c < 0x80) c = '?'; 5782 } else { 5783 if (c < 0xF0) { /* Three-byte sequence */ 5784 f_read(fp, s, 2, &rc); 5785 if (rc != 2) break; 5786 c = c << 12 | (s[0] & 0x3F) << 6 | (s[1] & 0x3F); 5787 if (c < 0x800) c = '?'; 5788 } else { /* Reject four-byte sequence */ 5789 c = '?'; 5790 } 5791 } 5792 } 5793 #elif _STRF_ENCODE == 2 /* Read a character in UTF-16BE */ 5794 f_read(fp, s, 2, &rc); 5795 if (rc != 2) break; 5796 c = s[1] + (s[0] << 8); 5797 #elif _STRF_ENCODE == 1 /* Read a character in UTF-16LE */ 5798 f_read(fp, s, 2, &rc); 5799 if (rc != 2) break; 5800 c = s[0] + (s[1] << 8); 5801 #else /* Read a character in ANSI/OEM */ 5802 f_read(fp, s, 1, &rc); 5803 if (rc != 1) break; 5804 c = s[0]; 5805 if (IsDBCS1(c)) { 5806 f_read(fp, s, 1, &rc); 5807 if (rc != 1) break; 5808 c = (c << 8) + s[0]; 5809 } 5810 c = ff_convert(c, 1); /* OEM -> Unicode */ 5811 if (!c) c = '?'; 5812 #endif 5813 #else /* Read a character without conversion */ 5814 f_read(fp, s, 1, &rc); 5815 if (rc != 1) break; 5816 c = s[0]; 5817 #endif 5818 if (_USE_STRFUNC == 2 && c == '\r') continue; /* Strip '\r' */ 5819 *p++ = c; 5820 n++; 5821 if (c == '\n') break; /* Break on EOL */ 5822 } 5823 *p = 0; 5824 return n ? buff : 0; /* When no data read (eof or error), return with error. */ 5825 } 5826 5827 5828 5829 5830 #if !_FS_READONLY 5831 #include <stdarg.h> 5832 /*-----------------------------------------------------------------------*/ 5833 /* Put a character to the file */ 5834 /*-----------------------------------------------------------------------*/ 5835 5836 typedef struct { 5837 FIL *fp; /* Ptr to the writing file */ 5838 int idx, nchr; /* Write index of buf[] (-1:error), number of chars written */ 5839 BYTE buf[64]; /* Write buffer */ 5840 } putbuff; 5841 5842 5843 static 5844 void putc_bfd ( /* Buffered write with code conversion */ 5845 putbuff* pb, 5846 TCHAR c 5847 ) 5848 { 5849 UINT bw; 5850 int i; 5851 5852 5853 if (_USE_STRFUNC == 2 && c == '\n') { /* LF -> CRLF conversion */ 5854 putc_bfd(pb, '\r'); 5855 } 5856 5857 i = pb->idx; /* Write index of pb->buf[] */ 5858 if (i < 0) return; 5859 5860 #if _LFN_UNICODE 5861 #if _STRF_ENCODE == 3 /* Write a character in UTF-8 */ 5862 if (c < 0x80) { /* 7-bit */ 5863 pb->buf[i++] = (BYTE)c; 5864 } else { 5865 if (c < 0x800) { /* 11-bit */ 5866 pb->buf[i++] = (BYTE)(0xC0 | c >> 6); 5867 } else { /* 16-bit */ 5868 pb->buf[i++] = (BYTE)(0xE0 | c >> 12); 5869 pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F)); 5870 } 5871 pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F)); 5872 } 5873 #elif _STRF_ENCODE == 2 /* Write a character in UTF-16BE */ 5874 pb->buf[i++] = (BYTE)(c >> 8); 5875 pb->buf[i++] = (BYTE)c; 5876 #elif _STRF_ENCODE == 1 /* Write a character in UTF-16LE */ 5877 pb->buf[i++] = (BYTE)c; 5878 pb->buf[i++] = (BYTE)(c >> 8); 5879 #else /* Write a character in ANSI/OEM */ 5880 c = ff_convert(c, 0); /* Unicode -> OEM */ 5881 if (!c) c = '?'; 5882 if (c >= 0x100) 5883 pb->buf[i++] = (BYTE)(c >> 8); 5884 pb->buf[i++] = (BYTE)c; 5885 #endif 5886 #else /* Write a character without conversion */ 5887 pb->buf[i++] = (BYTE)c; 5888 #endif 5889 5890 if (i >= (int)(sizeof pb->buf) - 3) { /* Write buffered characters to the file */ 5891 f_write(pb->fp, pb->buf, (UINT)i, &bw); 5892 i = (bw == (UINT)i) ? 0 : -1; 5893 } 5894 pb->idx = i; 5895 pb->nchr++; 5896 } 5897 5898 5899 static 5900 int putc_flush ( /* Flush left characters in the buffer */ 5901 putbuff* pb 5902 ) 5903 { 5904 UINT nw; 5905 5906 if ( pb->idx >= 0 /* Flush buffered characters to the file */ 5907 && f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK 5908 && (UINT)pb->idx == nw) return pb->nchr; 5909 return EOF; 5910 } 5911 5912 5913 static 5914 void putc_init ( /* Initialize write buffer */ 5915 putbuff* pb, 5916 FIL* fp 5917 ) 5918 { 5919 pb->fp = fp; 5920 pb->nchr = pb->idx = 0; 5921 } 5922 5923 5924 5925 int f_putc ( 5926 TCHAR c, /* A character to be output */ 5927 FIL* fp /* Pointer to the file object */ 5928 ) 5929 { 5930 putbuff pb; 5931 5932 5933 putc_init(&pb, fp); 5934 putc_bfd(&pb, c); /* Put the character */ 5935 return putc_flush(&pb); 5936 } 5937 5938 5939 5940 5941 /*-----------------------------------------------------------------------*/ 5942 /* Put a string to the file */ 5943 /*-----------------------------------------------------------------------*/ 5944 5945 int f_puts ( 5946 const TCHAR* str, /* Pointer to the string to be output */ 5947 FIL* fp /* Pointer to the file object */ 5948 ) 5949 { 5950 putbuff pb; 5951 5952 5953 putc_init(&pb, fp); 5954 while (*str) putc_bfd(&pb, *str++); /* Put the string */ 5955 return putc_flush(&pb); 5956 } 5957 5958 5959 5960 5961 /*-----------------------------------------------------------------------*/ 5962 /* Put a formatted string to the file */ 5963 /*-----------------------------------------------------------------------*/ 5964 5965 int f_printf ( 5966 FIL* fp, /* Pointer to the file object */ 5967 const TCHAR* fmt, /* Pointer to the format string */ 5968 ... /* Optional arguments... */ 5969 ) 5970 { 5971 va_list arp; 5972 putbuff pb; 5973 BYTE f, r; 5974 UINT i, j, w; 5975 DWORD v; 5976 TCHAR c, d, str[32], *p; 5977 5978 5979 putc_init(&pb, fp); 5980 5981 va_start(arp, fmt); 5982 5983 for (;;) { 5984 c = *fmt++; 5985 if (c == 0) break; /* End of string */ 5986 if (c != '%') { /* Non escape character */ 5987 putc_bfd(&pb, c); 5988 continue; 5989 } 5990 w = f = 0; 5991 c = *fmt++; 5992 if (c == '0') { /* Flag: '0' padding */ 5993 f = 1; c = *fmt++; 5994 } else { 5995 if (c == '-') { /* Flag: left justified */ 5996 f = 2; c = *fmt++; 5997 } 5998 } 5999 while (IsDigit(c)) { /* Precision */ 6000 w = w * 10 + c - '0'; 6001 c = *fmt++; 6002 } 6003 if (c == 'l' || c == 'L') { /* Prefix: Size is long int */ 6004 f |= 4; c = *fmt++; 6005 } 6006 if (!c) break; 6007 d = c; 6008 if (IsLower(d)) d -= 0x20; 6009 switch (d) { /* Type is... */ 6010 case 'S' : /* String */ 6011 p = va_arg(arp, TCHAR*); 6012 for (j = 0; p[j]; j++) ; 6013 if (!(f & 2)) { 6014 while (j++ < w) putc_bfd(&pb, ' '); 6015 } 6016 while (*p) putc_bfd(&pb, *p++); 6017 while (j++ < w) putc_bfd(&pb, ' '); 6018 continue; 6019 case 'C' : /* Character */ 6020 putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue; 6021 case 'B' : /* Binary */ 6022 r = 2; break; 6023 case 'O' : /* Octal */ 6024 r = 8; break; 6025 case 'D' : /* Signed decimal */ 6026 case 'U' : /* Unsigned decimal */ 6027 r = 10; break; 6028 case 'X' : /* Hexdecimal */ 6029 r = 16; break; 6030 default: /* Unknown type (pass-through) */ 6031 putc_bfd(&pb, c); continue; 6032 } 6033 6034 /* Get an argument and put it in numeral */ 6035 v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int)); 6036 if (d == 'D' && (v & 0x80000000)) { 6037 v = 0 - v; 6038 f |= 8; 6039 } 6040 i = 0; 6041 do { 6042 d = (TCHAR)(v % r); v /= r; 6043 if (d > 9) d += (c == 'x') ? 0x27 : 0x07; 6044 str[i++] = d + '0'; 6045 } while (v && i < sizeof str / sizeof str[0]); 6046 if (f & 8) str[i++] = '-'; 6047 j = i; d = (f & 1) ? '0' : ' '; 6048 while (!(f & 2) && j++ < w) putc_bfd(&pb, d); 6049 do putc_bfd(&pb, str[--i]); while (i); 6050 while (j++ < w) putc_bfd(&pb, d); 6051 } 6052 6053 va_end(arp); 6054 6055 return putc_flush(&pb); 6056 } 6057 6058 #endif /* !_FS_READONLY */ 6059 #endif /* _USE_STRFUNC */ 6060 6061 #include <rtthread.h> 6062 #if _VOLUMES > 1 6063 int elm_get_vol(FATFS *fat) 6064 { 6065 int vol; 6066 6067 for (vol = 0; vol < _VOLUMES; vol ++) 6068 { 6069 if (FatFs[vol] == fat) return vol; 6070 } 6071 6072 return -1; 6073 } 6074 #endif 6075 6076