David Smart
Revised to support ability to have both SD and USB drives mounted.
Dependents: Multi-FileSystem Multi-FileSystem
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FATFileSystem
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mbed official
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ff.cpp
00001 /*----------------------------------------------------------------------------/ 00002 / FatFs - FAT file system module R0.11a (C)ChaN, 2015 / 00003 /-----------------------------------------------------------------------------/ 00004 / FatFs module is a free software that opened under license policy of 00005 / following conditions. 00006 / 00007 / Copyright (C) 2015, ChaN, all right reserved. 00008 / 00009 / 1. Redistributions of source code must retain the above copyright notice, 00010 / this condition and the following disclaimer. 00011 / 00012 / This software is provided by the copyright holder and contributors "AS IS" 00013 / and any warranties related to this software are DISCLAIMED. 00014 / The copyright owner or contributors be NOT LIABLE for any damages caused 00015 / by use of this software. 00016 /----------------------------------------------------------------------------*/ 00017 00018 00019 #include "ff.h" /* Declarations of FatFs API */ 00020 #include "diskio.h" /* Declarations of disk I/O functions */ 00021 00022 //#define DEBUG "FF__" 00023 // ... 00024 // INFO("Stuff to show %d", var); // new-line is automatically appended 00025 // 00026 #if (defined(DEBUG) && !defined(TARGET_LPC11U24)) 00027 #include "mbed.h" 00028 #define INFO(x, ...) std::printf("[INF %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__); 00029 #define WARN(x, ...) std::printf("[WRN %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__); 00030 #define ERR(x, ...) std::printf("[ERR %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__); 00031 static void HexDump(const char * title, const uint8_t * p, int count) 00032 { 00033 int i; 00034 char buf[100] = "0000: "; 00035 00036 if (*title) 00037 INFO("%s", title); 00038 for (i=0; i<count; ) { 00039 sprintf(buf + strlen(buf), "%02X ", *(p+i)); 00040 if ((++i & 0x0F) == 0x00) { 00041 INFO("%s", buf); 00042 if (i < count) 00043 sprintf(buf, "%04X: ", i); 00044 else 00045 buf[0] = '\0'; 00046 } 00047 } 00048 if (strlen(buf)) 00049 INFO("%s", buf); 00050 } 00051 #else 00052 #define INFO(x, ...) 00053 #define WARN(x, ...) 00054 #define ERR(x, ...) 00055 #define HexDump(a, b, c) 00056 #endif 00057 00058 /*-------------------------------------------------------------------------- 00059 00060 Module Private Definitions 00061 00062 ---------------------------------------------------------------------------*/ 00063 00064 #if _FATFS != 64180 /* Revision ID */ 00065 #error Wrong include file (ff.h). 00066 #endif 00067 00068 00069 /* Reentrancy related */ 00070 #if _FS_REENTRANT 00071 #if _USE_LFN == 1 00072 #error Static LFN work area cannot be used at thread-safe configuration 00073 #endif 00074 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; } 00075 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } 00076 #else 00077 #define ENTER_FF(fs) 00078 #define LEAVE_FF(fs, res) return res 00079 #endif 00080 00081 #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); } 00082 00083 00084 /* Definitions of sector size */ 00085 #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) 00086 #error Wrong sector size configuration 00087 #endif 00088 #if _MAX_SS == _MIN_SS 00089 #define SS(fs) ((UINT)_MAX_SS) /* Fixed sector size */ 00090 #else 00091 #define SS(fs) ((fs)->ssize) /* Variable sector size */ 00092 #endif 00093 00094 00095 /* Timestamp feature */ 00096 #if _FS_NORTC == 1 00097 #if _NORTC_YEAR < 1980 || _NORTC_YEAR > 2107 || _NORTC_MON < 1 || _NORTC_MON > 12 || _NORTC_MDAY < 1 || _NORTC_MDAY > 31 00098 #error Invalid _FS_NORTC settings 00099 #endif 00100 #define GET_FATTIME() ((DWORD)(_NORTC_YEAR - 1980) << 25 | (DWORD)_NORTC_MON << 21 | (DWORD)_NORTC_MDAY << 16) 00101 #else 00102 #define GET_FATTIME() get_fattime() 00103 #endif 00104 00105 00106 /* File access control feature */ 00107 #if _FS_LOCK 00108 #if _FS_READONLY 00109 #error _FS_LOCK must be 0 at read-only configuration 00110 #endif 00111 typedef struct { 00112 FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */ 00113 DWORD clu; /* Object ID 2, directory (0:root) */ 00114 WORD idx; /* Object ID 3, directory index */ 00115 WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */ 00116 } FILESEM; 00117 #endif 00118 00119 00120 00121 /* DBCS code ranges and SBCS upper conversion tables */ 00122 00123 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */ 00124 #define _DF1S 0x81 /* DBC 1st byte range 1 start */ 00125 #define _DF1E 0x9F /* DBC 1st byte range 1 end */ 00126 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */ 00127 #define _DF2E 0xFC /* DBC 1st byte range 2 end */ 00128 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */ 00129 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */ 00130 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */ 00131 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */ 00132 00133 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */ 00134 #define _DF1S 0x81 00135 #define _DF1E 0xFE 00136 #define _DS1S 0x40 00137 #define _DS1E 0x7E 00138 #define _DS2S 0x80 00139 #define _DS2E 0xFE 00140 00141 #elif _CODE_PAGE == 949 /* Korean */ 00142 #define _DF1S 0x81 00143 #define _DF1E 0xFE 00144 #define _DS1S 0x41 00145 #define _DS1E 0x5A 00146 #define _DS2S 0x61 00147 #define _DS2E 0x7A 00148 #define _DS3S 0x81 00149 #define _DS3E 0xFE 00150 00151 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */ 00152 #define _DF1S 0x81 00153 #define _DF1E 0xFE 00154 #define _DS1S 0x40 00155 #define _DS1E 0x7E 00156 #define _DS2S 0xA1 00157 #define _DS2E 0xFE 00158 00159 #elif _CODE_PAGE == 437 /* U.S. */ 00160 #define _DF1S 0 00161 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 00162 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00163 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00164 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00165 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00166 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00167 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00168 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00169 00170 #elif _CODE_PAGE == 720 /* Arabic */ 00171 #define _DF1S 0 00172 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00173 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00174 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00175 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00176 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00177 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00178 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00179 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00180 00181 #elif _CODE_PAGE == 737 /* Greek */ 00182 #define _DF1S 0 00183 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00184 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \ 00185 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \ 00186 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00187 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00188 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00189 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00190 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00191 00192 #elif _CODE_PAGE == 771 /* KBL */ 00193 #define _DF1S 0 00194 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00195 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00196 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00197 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00198 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00199 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \ 00200 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00201 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF} 00202 00203 #elif _CODE_PAGE == 775 /* Baltic */ 00204 #define _DF1S 0 00205 #define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \ 00206 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 00207 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00208 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00209 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00210 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00211 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \ 00212 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00213 00214 #elif _CODE_PAGE == 850 /* Latin 1 */ 00215 #define _DF1S 0 00216 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \ 00217 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \ 00218 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00219 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00220 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00221 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \ 00222 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \ 00223 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00224 00225 #elif _CODE_PAGE == 852 /* Latin 2 */ 00226 #define _DF1S 0 00227 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \ 00228 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \ 00229 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \ 00230 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \ 00231 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00232 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00233 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \ 00234 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF} 00235 00236 #elif _CODE_PAGE == 855 /* Cyrillic */ 00237 #define _DF1S 0 00238 #define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \ 00239 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \ 00240 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \ 00241 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \ 00242 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00243 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \ 00244 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \ 00245 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF} 00246 00247 #elif _CODE_PAGE == 857 /* Turkish */ 00248 #define _DF1S 0 00249 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \ 00250 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \ 00251 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00252 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00253 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00254 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00255 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \ 00256 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00257 00258 #elif _CODE_PAGE == 860 /* Portuguese */ 00259 #define _DF1S 0 00260 #define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \ 00261 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00262 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00263 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00264 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00265 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00266 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00267 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00268 00269 #elif _CODE_PAGE == 861 /* Icelandic */ 00270 #define _DF1S 0 00271 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \ 00272 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 00273 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00274 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00275 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00276 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00277 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00278 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00279 00280 #elif _CODE_PAGE == 862 /* Hebrew */ 00281 #define _DF1S 0 00282 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00283 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00284 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00285 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00286 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00287 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00288 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00289 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00290 00291 #elif _CODE_PAGE == 863 /* Canadian-French */ 00292 #define _DF1S 0 00293 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \ 00294 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \ 00295 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00296 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00297 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00298 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00299 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00300 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00301 00302 #elif _CODE_PAGE == 864 /* Arabic */ 00303 #define _DF1S 0 00304 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 00305 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00306 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00307 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00308 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00309 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00310 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00311 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00312 00313 #elif _CODE_PAGE == 865 /* Nordic */ 00314 #define _DF1S 0 00315 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 00316 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00317 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00318 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00319 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00320 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00321 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00322 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00323 00324 #elif _CODE_PAGE == 866 /* Russian */ 00325 #define _DF1S 0 00326 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00327 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00328 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00329 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00330 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00331 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00332 0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00333 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00334 00335 #elif _CODE_PAGE == 869 /* Greek 2 */ 00336 #define _DF1S 0 00337 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00338 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \ 00339 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00340 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00341 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00342 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \ 00343 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \ 00344 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF} 00345 00346 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */ 00347 #if _USE_LFN 00348 #error Cannot use LFN feature without valid code page. 00349 #endif 00350 #define _DF1S 0 00351 00352 #else 00353 #error Unknown code page 00354 00355 #endif 00356 00357 00358 /* Character code support macros */ 00359 #define IsUpper(c) (((c)>='A')&&((c)<='Z')) 00360 #define IsLower(c) (((c)>='a')&&((c)<='z')) 00361 #define IsDigit(c) (((c)>='0')&&((c)<='9')) 00362 00363 #if _DF1S /* Code page is DBCS */ 00364 00365 #ifdef _DF2S /* Two 1st byte areas */ 00366 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) 00367 #else /* One 1st byte area */ 00368 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) 00369 #endif 00370 00371 #ifdef _DS3S /* Three 2nd byte areas */ 00372 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) 00373 #else /* Two 2nd byte areas */ 00374 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) 00375 #endif 00376 00377 #else /* Code page is SBCS */ 00378 00379 #define IsDBCS1(c) 0 00380 #define IsDBCS2(c) 0 00381 00382 #endif /* _DF1S */ 00383 00384 00385 /* Name status flags */ 00386 #define NSFLAG 11 /* Index of name status byte in fn[] */ 00387 #define NS_LOSS 0x01 /* Out of 8.3 format */ 00388 #define NS_LFN 0x02 /* Force to create LFN entry */ 00389 #define NS_LAST 0x04 /* Last segment */ 00390 #define NS_BODY 0x08 /* Lower case flag (body) */ 00391 #define NS_EXT 0x10 /* Lower case flag (ext) */ 00392 #define NS_DOT 0x20 /* Dot entry */ 00393 00394 00395 /* FAT sub-type boundaries (Differ from specs but correct for real DOS/Windows) */ 00396 #define MIN_FAT16 4086U /* Minimum number of clusters of FAT16 */ 00397 #define MIN_FAT32 65526U /* Minimum number of clusters of FAT32 */ 00398 00399 00400 /* FatFs refers the members in the FAT structures as byte array instead of 00401 / structure members because the structure is not binary compatible between 00402 / different platforms */ 00403 00404 #define BS_jmpBoot 0 /* x86 jump instruction (3) */ 00405 #define BS_OEMName 3 /* OEM name (8) */ 00406 #define BPB_BytsPerSec 11 /* Sector size [byte] (2) */ 00407 #define BPB_SecPerClus 13 /* Cluster size [sector] (1) */ 00408 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */ 00409 #define BPB_NumFATs 16 /* Number of FAT copies (1) */ 00410 #define BPB_RootEntCnt 17 /* Number of root directory entries for FAT12/16 (2) */ 00411 #define BPB_TotSec16 19 /* Volume size [sector] (2) */ 00412 #define BPB_Media 21 /* Media descriptor (1) */ 00413 #define BPB_FATSz16 22 /* FAT size [sector] (2) */ 00414 #define BPB_SecPerTrk 24 /* Track size [sector] (2) */ 00415 #define BPB_NumHeads 26 /* Number of heads (2) */ 00416 #define BPB_HiddSec 28 /* Number of special hidden sectors (4) */ 00417 #define BPB_TotSec32 32 /* Volume size [sector] (4) */ 00418 #define BS_DrvNum 36 /* Physical drive number (1) */ 00419 #define BS_NTres 37 /* Error flag (1) */ 00420 #define BS_BootSig 38 /* Extended boot signature (1) */ 00421 #define BS_VolID 39 /* Volume serial number (4) */ 00422 #define BS_VolLab 43 /* Volume label (8) */ 00423 #define BS_FilSysType 54 /* File system type (1) */ 00424 #define BPB_FATSz32 36 /* FAT size [sector] (4) */ 00425 #define BPB_ExtFlags 40 /* Extended flags (2) */ 00426 #define BPB_FSVer 42 /* File system version (2) */ 00427 #define BPB_RootClus 44 /* Root directory first cluster (4) */ 00428 #define BPB_FSInfo 48 /* Offset of FSINFO sector (2) */ 00429 #define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */ 00430 #define BS_DrvNum32 64 /* Physical drive number (1) */ 00431 #define BS_NTres32 65 /* Error flag (1) */ 00432 #define BS_BootSig32 66 /* Extended boot signature (1) */ 00433 #define BS_VolID32 67 /* Volume serial number (4) */ 00434 #define BS_VolLab32 71 /* Volume label (8) */ 00435 #define BS_FilSysType32 82 /* File system type (1) */ 00436 #define FSI_LeadSig 0 /* FSI: Leading signature (4) */ 00437 #define FSI_StrucSig 484 /* FSI: Structure signature (4) */ 00438 #define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */ 00439 #define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */ 00440 #define MBR_Table 446 /* MBR: Partition table offset (2) */ 00441 #define SZ_PTE 16 /* MBR: Size of a partition table entry */ 00442 #define BS_55AA 510 /* Signature word (2) */ 00443 00444 #define DIR_Name 0 /* Short file name (11) */ 00445 #define DIR_Attr 11 /* Attribute (1) */ 00446 #define DIR_NTres 12 /* Lower case flag (1) */ 00447 #define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */ 00448 #define DIR_CrtTime 14 /* Created time (2) */ 00449 #define DIR_CrtDate 16 /* Created date (2) */ 00450 #define DIR_LstAccDate 18 /* Last accessed date (2) */ 00451 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */ 00452 #define DIR_WrtTime 22 /* Modified time (2) */ 00453 #define DIR_WrtDate 24 /* Modified date (2) */ 00454 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */ 00455 #define DIR_FileSize 28 /* File size (4) */ 00456 #define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */ 00457 #define LDIR_Attr 11 /* LFN attribute (1) */ 00458 #define LDIR_Type 12 /* LFN type (1) */ 00459 #define LDIR_Chksum 13 /* Checksum of corresponding SFN entry */ 00460 #define LDIR_FstClusLO 26 /* Must be zero (0) */ 00461 #define SZ_DIRE 32 /* Size of a directory entry */ 00462 #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */ 00463 #define DDEM 0xE5 /* Deleted directory entry mark at DIR_Name[0] */ 00464 #define RDDEM 0x05 /* Replacement of the character collides with DDEM */ 00465 00466 00467 00468 00469 /*-------------------------------------------------------------------------- 00470 00471 Module Private Work Area 00472 00473 ---------------------------------------------------------------------------*/ 00474 00475 /* Remark: Uninitialized variables with static duration are guaranteed 00476 / zero/null at start-up. If not, either the linker or start-up routine 00477 / being used is not compliance with ANSI-C standard. 00478 */ 00479 00480 #if _VOLUMES < 1 || _VOLUMES > 9 00481 #error Wrong _VOLUMES setting 00482 #endif 00483 static FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */ 00484 static WORD Fsid; /* File system mount ID */ 00485 00486 #if _FS_RPATH && _VOLUMES >= 2 00487 static BYTE CurrVol; /* Current drive */ 00488 #endif 00489 00490 #if _FS_LOCK 00491 static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */ 00492 #endif 00493 00494 #if _USE_LFN == 0 /* Non LFN feature */ 00495 #define DEFINE_NAMEBUF BYTE sfn[12] 00496 #define INIT_BUF(dobj) (dobj).fn = sfn 00497 #define FREE_BUF() 00498 #else 00499 #if _MAX_LFN < 12 || _MAX_LFN > 255 00500 #error Wrong _MAX_LFN setting 00501 #endif 00502 #if _USE_LFN == 1 /* LFN feature with static working buffer */ 00503 static WCHAR LfnBuf[_MAX_LFN + 1]; 00504 #define DEFINE_NAMEBUF BYTE sfn[12] 00505 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; } 00506 #define FREE_BUF() 00507 #elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */ 00508 #define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN + 1] 00509 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; } 00510 #define FREE_BUF() 00511 #elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */ 00512 #define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR *lfn 00513 #define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); (dobj).lfn = lfn; (dobj).fn = sfn; } 00514 #define FREE_BUF() ff_memfree(lfn) 00515 #else 00516 #error Wrong _USE_LFN setting 00517 #endif 00518 #endif 00519 00520 #ifdef _EXCVT 00521 static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for SBCS extended characters */ 00522 #endif 00523 00524 00525 00526 00527 00528 00529 /*-------------------------------------------------------------------------- 00530 00531 Module Private Functions 00532 00533 ---------------------------------------------------------------------------*/ 00534 00535 00536 /*-----------------------------------------------------------------------*/ 00537 /* String functions */ 00538 /*-----------------------------------------------------------------------*/ 00539 00540 /* Copy memory to memory */ 00541 static 00542 void mem_cpy (void* dst, const void* src, UINT cnt) { 00543 BYTE *d = (BYTE*)dst; 00544 const BYTE *s = (const BYTE*)src; 00545 00546 #if _WORD_ACCESS == 1 00547 while (cnt >= sizeof (int)) { 00548 *(int*)d = *(int*)s; 00549 d += sizeof (int); s += sizeof (int); 00550 cnt -= sizeof (int); 00551 } 00552 #endif 00553 while (cnt--) 00554 *d++ = *s++; 00555 } 00556 00557 /* Fill memory */ 00558 static 00559 void mem_set (void* dst, int val, UINT cnt) { 00560 BYTE *d = (BYTE*)dst; 00561 00562 while (cnt--) 00563 *d++ = (BYTE)val; 00564 } 00565 00566 /* Compare memory to memory */ 00567 static 00568 int mem_cmp (const void* dst, const void* src, UINT cnt) { 00569 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; 00570 int r = 0; 00571 00572 while (cnt-- && (r = *d++ - *s++) == 0) ; 00573 return r; 00574 } 00575 00576 /* Check if chr is contained in the string */ 00577 static 00578 int chk_chr (const char* str, int chr) { 00579 while (*str && *str != chr) str++; 00580 return *str; 00581 } 00582 00583 00584 00585 00586 /*-----------------------------------------------------------------------*/ 00587 /* Request/Release grant to access the volume */ 00588 /*-----------------------------------------------------------------------*/ 00589 #if _FS_REENTRANT 00590 static 00591 int lock_fs ( 00592 FATFS* fs /* File system object */ 00593 ) 00594 { 00595 return ff_req_grant(fs->sobj); 00596 } 00597 00598 00599 static 00600 void unlock_fs ( 00601 FATFS* fs, /* File system object */ 00602 FRESULT res /* Result code to be returned */ 00603 ) 00604 { 00605 if (fs && 00606 res != FR_NOT_ENABLED && 00607 res != FR_INVALID_DRIVE && 00608 res != FR_INVALID_OBJECT && 00609 res != FR_TIMEOUT) { 00610 ff_rel_grant(fs->sobj); 00611 } 00612 } 00613 #endif 00614 00615 00616 00617 00618 /*-----------------------------------------------------------------------*/ 00619 /* File lock control functions */ 00620 /*-----------------------------------------------------------------------*/ 00621 #if _FS_LOCK 00622 00623 static 00624 FRESULT chk_lock ( /* Check if the file can be accessed */ 00625 FATFS_DIR* dp, /* Directory object pointing the file to be checked */ 00626 int acc /* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */ 00627 ) 00628 { 00629 UINT i, be; 00630 00631 /* Search file semaphore table */ 00632 for (i = be = 0; i < _FS_LOCK; i++) { 00633 if (Files[i].fs) { /* Existing entry */ 00634 if (Files[i].fs == dp->fs && /* Check if the object matched with an open object */ 00635 Files[i].clu == dp->sclust && 00636 Files[i].idx == dp->index) break; 00637 } else { /* Blank entry */ 00638 be = 1; 00639 } 00640 } 00641 if (i == _FS_LOCK) /* The object is not opened */ 00642 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */ 00643 00644 /* The object has been opened. Reject any open against writing file and all write mode open */ 00645 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK; 00646 } 00647 00648 00649 static 00650 int enq_lock (void) /* Check if an entry is available for a new object */ 00651 { 00652 UINT i; 00653 00654 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; 00655 return (i == _FS_LOCK) ? 0 : 1; 00656 } 00657 00658 00659 static 00660 UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */ 00661 FATFS_DIR* dp, /* Directory object pointing the file to register or increment */ 00662 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ 00663 ) 00664 { 00665 UINT i; 00666 00667 00668 for (i = 0; i < _FS_LOCK; i++) { /* Find the object */ 00669 if (Files[i].fs == dp->fs && 00670 Files[i].clu == dp->sclust && 00671 Files[i].idx == dp->index) break; 00672 } 00673 00674 if (i == _FS_LOCK) { /* Not opened. Register it as new. */ 00675 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; 00676 if (i == _FS_LOCK) return 0; /* No free entry to register (int err) */ 00677 Files[i].fs = dp->fs; 00678 Files[i].clu = dp->sclust; 00679 Files[i].idx = dp->index; 00680 Files[i].ctr = 0; 00681 } 00682 00683 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */ 00684 00685 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */ 00686 00687 return i + 1; 00688 } 00689 00690 00691 static 00692 FRESULT dec_lock ( /* Decrement object open counter */ 00693 UINT i /* Semaphore index (1..) */ 00694 ) 00695 { 00696 WORD n; 00697 FRESULT res; 00698 00699 00700 if (--i < _FS_LOCK) { /* Shift index number origin from 0 */ 00701 n = Files[i].ctr; 00702 if (n == 0x100) n = 0; /* If write mode open, delete the entry */ 00703 if (n) n--; /* Decrement read mode open count */ 00704 Files[i].ctr = n; 00705 if (!n) Files[i].fs = 0; /* Delete the entry if open count gets zero */ 00706 res = FR_OK; 00707 } else { 00708 res = FR_INT_ERR; /* Invalid index nunber */ 00709 } 00710 return res; 00711 } 00712 00713 00714 static 00715 void clear_lock ( /* Clear lock entries of the volume */ 00716 FATFS *fs 00717 ) 00718 { 00719 UINT i; 00720 00721 for (i = 0; i < _FS_LOCK; i++) { 00722 if (Files[i].fs == fs) Files[i].fs = 0; 00723 } 00724 } 00725 #endif 00726 00727 00728 00729 00730 /*-----------------------------------------------------------------------*/ 00731 /* Move/Flush disk access window in the file system object */ 00732 /*-----------------------------------------------------------------------*/ 00733 #if !_FS_READONLY 00734 static 00735 FRESULT sync_window ( /* FR_OK:succeeded, !=0:error */ 00736 FATFS* fs /* File system object */ 00737 ) 00738 { 00739 DWORD wsect; 00740 UINT nf; 00741 FRESULT res = FR_OK; 00742 00743 00744 if (fs->wflag) { /* Write back the sector if it is dirty */ 00745 wsect = fs->winsect; /* Current sector number */ 00746 if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) { 00747 res = FR_DISK_ERR; 00748 } else { 00749 fs->wflag = 0; 00750 if (wsect - fs->fatbase < fs->fsize) { /* Is it in the FAT area? */ 00751 for (nf = fs->n_fats; nf >= 2; nf--) { /* Reflect the change to all FAT copies */ 00752 wsect += fs->fsize; 00753 disk_write(fs->drv, fs->win, wsect, 1); 00754 } 00755 } 00756 } 00757 } 00758 return res; 00759 } 00760 #endif 00761 00762 00763 static 00764 FRESULT move_window ( /* FR_OK(0):succeeded, !=0:error */ 00765 FATFS* fs, /* File system object */ 00766 DWORD sector /* Sector number to make appearance in the fs->win[] */ 00767 ) 00768 { 00769 FRESULT res = FR_OK; 00770 00771 00772 if (sector != fs->winsect) { /* Window offset changed? */ 00773 #if !_FS_READONLY 00774 res = sync_window(fs); /* Write-back changes */ 00775 #endif 00776 if (res == FR_OK) { /* Fill sector window with new data */ 00777 if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) { 00778 sector = 0xFFFFFFFF; /* Invalidate window if data is not reliable */ 00779 res = FR_DISK_ERR; 00780 } 00781 fs->winsect = sector; 00782 } 00783 } 00784 return res; 00785 } 00786 00787 00788 00789 00790 /*-----------------------------------------------------------------------*/ 00791 /* Synchronize file system and strage device */ 00792 /*-----------------------------------------------------------------------*/ 00793 #if !_FS_READONLY 00794 static 00795 FRESULT sync_fs ( /* FR_OK:succeeded, !=0:error */ 00796 FATFS* fs /* File system object */ 00797 ) 00798 { 00799 FRESULT res; 00800 00801 00802 res = sync_window(fs); 00803 if (res == FR_OK) { 00804 /* Update FSInfo sector if needed */ 00805 if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) { 00806 /* Create FSInfo structure */ 00807 mem_set(fs->win, 0, SS(fs)); 00808 ST_WORD(fs->win + BS_55AA, 0xAA55); 00809 ST_DWORD(fs->win + FSI_LeadSig, 0x41615252); 00810 ST_DWORD(fs->win + FSI_StrucSig, 0x61417272); 00811 ST_DWORD(fs->win + FSI_Free_Count, fs->free_clust); 00812 ST_DWORD(fs->win + FSI_Nxt_Free, fs->last_clust); 00813 /* Write it into the FSInfo sector */ 00814 fs->winsect = fs->volbase + 1; 00815 disk_write(fs->drv, fs->win, fs->winsect, 1); 00816 fs->fsi_flag = 0; 00817 } 00818 /* Make sure that no pending write process in the physical drive */ 00819 if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK) 00820 res = FR_DISK_ERR; 00821 } 00822 00823 return res; 00824 } 00825 #endif 00826 00827 00828 00829 00830 /*-----------------------------------------------------------------------*/ 00831 /* Get sector# from cluster# */ 00832 /*-----------------------------------------------------------------------*/ 00833 /* Hidden API for hacks and disk tools */ 00834 00835 DWORD clust2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */ 00836 FATFS* fs, /* File system object */ 00837 DWORD clst /* Cluster# to be converted */ 00838 ) 00839 { 00840 clst -= 2; 00841 if (clst >= fs->n_fatent - 2) return 0; /* Invalid cluster# */ 00842 return clst * fs->csize + fs->database; 00843 } 00844 00845 00846 00847 00848 /*-----------------------------------------------------------------------*/ 00849 /* FAT access - Read value of a FAT entry */ 00850 /*-----------------------------------------------------------------------*/ 00851 /* Hidden API for hacks and disk tools */ 00852 00853 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x0FFFFFFF:Cluster status */ 00854 FATFS* fs, /* File system object */ 00855 DWORD clst /* FAT index number (cluster number) to get the value */ 00856 ) 00857 { 00858 UINT wc, bc; 00859 BYTE *p; 00860 DWORD val; 00861 00862 00863 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */ 00864 val = 1; /* Internal error */ 00865 00866 } else { 00867 val = 0xFFFFFFFF; /* Default value falls on disk error */ 00868 00869 switch (fs->fs_type) { 00870 case FS_FAT12 : 00871 bc = (UINT)clst; bc += bc / 2; 00872 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; 00873 wc = fs->win[bc++ % SS(fs)]; 00874 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; 00875 wc |= fs->win[bc % SS(fs)] << 8; 00876 val = clst & 1 ? wc >> 4 : (wc & 0xFFF); 00877 break; 00878 00879 case FS_FAT16 : 00880 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break; 00881 p = &fs->win[clst * 2 % SS(fs)]; 00882 val = LD_WORD(p); 00883 break; 00884 00885 case FS_FAT32 : 00886 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break; 00887 p = &fs->win[clst * 4 % SS(fs)]; 00888 val = LD_DWORD(p) & 0x0FFFFFFF; 00889 break; 00890 00891 default: 00892 val = 1; /* Internal error */ 00893 } 00894 } 00895 00896 return val; 00897 } 00898 00899 00900 00901 00902 /*-----------------------------------------------------------------------*/ 00903 /* FAT access - Change value of a FAT entry */ 00904 /*-----------------------------------------------------------------------*/ 00905 /* Hidden API for hacks and disk tools */ 00906 00907 #if !_FS_READONLY 00908 FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */ 00909 FATFS* fs, /* File system object */ 00910 DWORD clst, /* FAT index number (cluster number) to be changed */ 00911 DWORD val /* New value to be set to the entry */ 00912 ) 00913 { 00914 UINT bc; 00915 BYTE *p; 00916 FRESULT res; 00917 00918 00919 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */ 00920 res = FR_INT_ERR; 00921 00922 } else { 00923 switch (fs->fs_type) { 00924 case FS_FAT12 : 00925 bc = (UINT)clst; bc += bc / 2; 00926 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 00927 if (res != FR_OK) break; 00928 p = &fs->win[bc++ % SS(fs)]; 00929 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; 00930 fs->wflag = 1; 00931 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 00932 if (res != FR_OK) break; 00933 p = &fs->win[bc % SS(fs)]; 00934 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); 00935 fs->wflag = 1; 00936 break; 00937 00938 case FS_FAT16 : 00939 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); 00940 if (res != FR_OK) break; 00941 p = &fs->win[clst * 2 % SS(fs)]; 00942 ST_WORD(p, (WORD)val); 00943 fs->wflag = 1; 00944 break; 00945 00946 case FS_FAT32 : 00947 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); 00948 if (res != FR_OK) break; 00949 p = &fs->win[clst * 4 % SS(fs)]; 00950 val |= LD_DWORD(p) & 0xF0000000; 00951 ST_DWORD(p, val); 00952 fs->wflag = 1; 00953 break; 00954 00955 default : 00956 res = FR_INT_ERR; 00957 } 00958 } 00959 00960 return res; 00961 } 00962 #endif /* !_FS_READONLY */ 00963 00964 00965 00966 00967 /*-----------------------------------------------------------------------*/ 00968 /* FAT handling - Remove a cluster chain */ 00969 /*-----------------------------------------------------------------------*/ 00970 #if !_FS_READONLY 00971 static 00972 FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */ 00973 FATFS* fs, /* File system object */ 00974 DWORD clst /* Cluster# to remove a chain from */ 00975 ) 00976 { 00977 FRESULT res; 00978 DWORD nxt; 00979 #if _USE_TRIM 00980 DWORD scl = clst, ecl = clst, rt[2]; 00981 #endif 00982 00983 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */ 00984 res = FR_INT_ERR; 00985 00986 } else { 00987 res = FR_OK; 00988 while (clst < fs->n_fatent) { /* Not a last link? */ 00989 nxt = get_fat(fs, clst); /* Get cluster status */ 00990 if (nxt == 0) break; /* Empty cluster? */ 00991 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */ 00992 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */ 00993 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */ 00994 if (res != FR_OK) break; 00995 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSINFO */ 00996 fs->free_clust++; 00997 fs->fsi_flag |= 1; 00998 } 00999 #if _USE_TRIM 01000 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */ 01001 ecl = nxt; 01002 } else { /* End of contiguous clusters */ 01003 rt[0] = clust2sect(fs, scl); /* Start sector */ 01004 rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ 01005 disk_ioctl(fs->drv, CTRL_TRIM, rt); /* Erase the block */ 01006 scl = ecl = nxt; 01007 } 01008 #endif 01009 clst = nxt; /* Next cluster */ 01010 } 01011 } 01012 01013 return res; 01014 } 01015 #endif 01016 01017 01018 01019 01020 /*-----------------------------------------------------------------------*/ 01021 /* FAT handling - Stretch or Create a cluster chain */ 01022 /*-----------------------------------------------------------------------*/ 01023 #if !_FS_READONLY 01024 static 01025 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ 01026 FATFS* fs, /* File system object */ 01027 DWORD clst /* Cluster# to stretch, 0:Create a new chain */ 01028 ) 01029 { 01030 DWORD cs, ncl, scl; 01031 FRESULT res; 01032 01033 01034 if (clst == 0) { /* Create a new chain */ 01035 scl = fs->last_clust; /* Get suggested start point */ 01036 if (!scl || scl >= fs->n_fatent) scl = 1; 01037 } 01038 else { /* Stretch the current chain */ 01039 cs = get_fat(fs, clst); /* Check the cluster status */ 01040 if (cs < 2) return 1; /* Invalid value */ 01041 if (cs == 0xFFFFFFFF) return cs; /* A disk error occurred */ 01042 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */ 01043 scl = clst; 01044 } 01045 01046 ncl = scl; /* Start cluster */ 01047 for (;;) { 01048 ncl++; /* Next cluster */ 01049 if (ncl >= fs->n_fatent) { /* Check wrap around */ 01050 ncl = 2; 01051 if (ncl > scl) return 0; /* No free cluster */ 01052 } 01053 cs = get_fat(fs, ncl); /* Get the cluster status */ 01054 if (cs == 0) break; /* Found a free cluster */ 01055 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */ 01056 return cs; 01057 if (ncl == scl) return 0; /* No free cluster */ 01058 } 01059 01060 res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */ 01061 if (res == FR_OK && clst != 0) { 01062 res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */ 01063 } 01064 if (res == FR_OK) { 01065 fs->last_clust = ncl; /* Update FSINFO */ 01066 if (fs->free_clust != 0xFFFFFFFF) { 01067 fs->free_clust--; 01068 fs->fsi_flag |= 1; 01069 } 01070 } else { 01071 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; 01072 } 01073 01074 return ncl; /* Return new cluster number or error code */ 01075 } 01076 #endif /* !_FS_READONLY */ 01077 01078 01079 01080 01081 /*-----------------------------------------------------------------------*/ 01082 /* FAT handling - Convert offset into cluster with link map table */ 01083 /*-----------------------------------------------------------------------*/ 01084 01085 #if _USE_FASTSEEK 01086 static 01087 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ 01088 FIL* fp, /* Pointer to the file object */ 01089 DWORD ofs /* File offset to be converted to cluster# */ 01090 ) 01091 { 01092 DWORD cl, ncl, *tbl; 01093 01094 01095 tbl = fp->cltbl + 1; /* Top of CLMT */ 01096 cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */ 01097 for (;;) { 01098 ncl = *tbl++; /* Number of cluters in the fragment */ 01099 if (!ncl) return 0; /* End of table? (error) */ 01100 if (cl < ncl) break; /* In this fragment? */ 01101 cl -= ncl; tbl++; /* Next fragment */ 01102 } 01103 return cl + *tbl; /* Return the cluster number */ 01104 } 01105 #endif /* _USE_FASTSEEK */ 01106 01107 01108 01109 01110 /*-----------------------------------------------------------------------*/ 01111 /* Directory handling - Set directory index */ 01112 /*-----------------------------------------------------------------------*/ 01113 01114 static 01115 FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */ 01116 FATFS_DIR* dp, /* Pointer to directory object */ 01117 UINT idx /* Index of directory table */ 01118 ) 01119 { 01120 DWORD clst, sect; 01121 UINT ic; 01122 01123 01124 dp->index = (WORD)idx; /* Current index */ 01125 clst = dp->sclust; /* Table start cluster (0:root) */ 01126 if (clst == 1 || clst >= dp->fs->n_fatent) /* Check start cluster range */ 01127 return FR_INT_ERR; 01128 if (!clst && dp->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ 01129 clst = dp->fs->dirbase; 01130 01131 if (clst == 0) { /* Static table (root-directory in FAT12/16) */ 01132 if (idx >= dp->fs->n_rootdir) /* Is index out of range? */ 01133 return FR_INT_ERR; 01134 sect = dp->fs->dirbase; 01135 } 01136 else { /* Dynamic table (root-directory in FAT32 or sub-directory) */ 01137 ic = SS(dp->fs) / SZ_DIRE * dp->fs->csize; /* Entries per cluster */ 01138 while (idx >= ic) { /* Follow cluster chain */ 01139 clst = get_fat(dp->fs, clst); /* Get next cluster */ 01140 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 01141 if (clst < 2 || clst >= dp->fs->n_fatent) /* Reached to end of table or internal error */ 01142 return FR_INT_ERR; 01143 idx -= ic; 01144 } 01145 sect = clust2sect(dp->fs, clst); 01146 } 01147 dp->clust = clst; /* Current cluster# */ 01148 if (!sect) return FR_INT_ERR; 01149 dp->sect = sect + idx / (SS(dp->fs) / SZ_DIRE); /* Sector# of the directory entry */ 01150 dp->dir = dp->fs->win + (idx % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Ptr to the entry in the sector */ 01151 01152 return FR_OK; 01153 } 01154 01155 01156 01157 01158 /*-----------------------------------------------------------------------*/ 01159 /* Directory handling - Move directory table index next */ 01160 /*-----------------------------------------------------------------------*/ 01161 01162 static 01163 FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */ 01164 FATFS_DIR* dp, /* Pointer to the directory object */ 01165 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ 01166 ) 01167 { 01168 DWORD clst; 01169 UINT i; 01170 #if !_FS_READONLY 01171 UINT c; 01172 #endif 01173 01174 01175 i = dp->index + 1; 01176 if (!(i & 0xFFFF) || !dp->sect) /* Report EOT when index has reached 65535 */ 01177 return FR_NO_FILE; 01178 01179 if (!(i % (SS(dp->fs) / SZ_DIRE))) { /* Sector changed? */ 01180 dp->sect++; /* Next sector */ 01181 01182 if (!dp->clust) { /* Static table */ 01183 if (i >= dp->fs->n_rootdir) /* Report EOT if it reached end of static table */ 01184 return FR_NO_FILE; 01185 } 01186 else { /* Dynamic table */ 01187 if (((i / (SS(dp->fs) / SZ_DIRE)) & (dp->fs->csize - 1)) == 0) { /* Cluster changed? */ 01188 clst = get_fat(dp->fs, dp->clust); /* Get next cluster */ 01189 if (clst <= 1) return FR_INT_ERR; 01190 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 01191 if (clst >= dp->fs->n_fatent) { /* If it reached end of dynamic table, */ 01192 #if !_FS_READONLY 01193 if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT */ 01194 clst = create_chain(dp->fs, dp->clust); /* Stretch cluster chain */ 01195 if (clst == 0) return FR_DENIED; /* No free cluster */ 01196 if (clst == 1) return FR_INT_ERR; 01197 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 01198 /* Clean-up stretched table */ 01199 if (sync_window(dp->fs)) return FR_DISK_ERR;/* Flush disk access window */ 01200 mem_set(dp->fs->win, 0, SS(dp->fs)); /* Clear window buffer */ 01201 dp->fs->winsect = clust2sect(dp->fs, clst); /* Cluster start sector */ 01202 for (c = 0; c < dp->fs->csize; c++) { /* Fill the new cluster with 0 */ 01203 dp->fs->wflag = 1; 01204 if (sync_window(dp->fs)) return FR_DISK_ERR; 01205 dp->fs->winsect++; 01206 } 01207 dp->fs->winsect -= c; /* Rewind window offset */ 01208 #else 01209 if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT (this is to suppress warning) */ 01210 return FR_NO_FILE; /* Report EOT */ 01211 #endif 01212 } 01213 dp->clust = clst; /* Initialize data for new cluster */ 01214 dp->sect = clust2sect(dp->fs, clst); 01215 } 01216 } 01217 } 01218 01219 dp->index = (WORD)i; /* Current index */ 01220 dp->dir = dp->fs->win + (i % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Current entry in the window */ 01221 01222 return FR_OK; 01223 } 01224 01225 01226 01227 01228 /*-----------------------------------------------------------------------*/ 01229 /* Directory handling - Reserve directory entry */ 01230 /*-----------------------------------------------------------------------*/ 01231 01232 #if !_FS_READONLY 01233 static 01234 FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */ 01235 FATFS_DIR* dp, /* Pointer to the directory object */ 01236 UINT nent /* Number of contiguous entries to allocate (1-21) */ 01237 ) 01238 { 01239 FRESULT res; 01240 UINT n; 01241 01242 01243 res = dir_sdi(dp, 0); 01244 if (res == FR_OK) { 01245 n = 0; 01246 do { 01247 res = move_window(dp->fs, dp->sect); 01248 if (res != FR_OK) break; 01249 if (dp->dir[0] == DDEM || dp->dir[0] == 0) { /* Is it a free entry? */ 01250 if (++n == nent) break; /* A block of contiguous free entries is found */ 01251 } else { 01252 n = 0; /* Not a blank entry. Restart to search */ 01253 } 01254 res = dir_next(dp, 1); /* Next entry with table stretch enabled */ 01255 } while (res == FR_OK); 01256 } 01257 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */ 01258 return res; 01259 } 01260 #endif 01261 01262 01263 01264 01265 /*-----------------------------------------------------------------------*/ 01266 /* Directory handling - Load/Store start cluster number */ 01267 /*-----------------------------------------------------------------------*/ 01268 01269 static 01270 DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */ 01271 FATFS* fs, /* Pointer to the fs object */ 01272 const BYTE* dir /* Pointer to the SFN entry */ 01273 ) 01274 { 01275 DWORD cl; 01276 01277 cl = LD_WORD(dir + DIR_FstClusLO); 01278 if (fs->fs_type == FS_FAT32) 01279 cl |= (DWORD)LD_WORD(dir + DIR_FstClusHI) << 16; 01280 01281 return cl; 01282 } 01283 01284 01285 #if !_FS_READONLY 01286 static 01287 void st_clust ( 01288 BYTE* dir, /* Pointer to the SFN entry */ 01289 DWORD cl /* Value to be set */ 01290 ) 01291 { 01292 ST_WORD(dir + DIR_FstClusLO, cl); 01293 ST_WORD(dir + DIR_FstClusHI, cl >> 16); 01294 } 01295 #endif 01296 01297 01298 01299 01300 /*-----------------------------------------------------------------------*/ 01301 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */ 01302 /*-----------------------------------------------------------------------*/ 01303 #if _USE_LFN 01304 static 01305 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN characters in the directory entry */ 01306 01307 01308 static 01309 int cmp_lfn ( /* 1:matched, 0:not matched */ 01310 WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */ 01311 BYTE* dir /* Pointer to the directory entry containing the part of LFN */ 01312 ) 01313 { 01314 UINT i, s; 01315 WCHAR wc, uc; 01316 01317 01318 if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */ 01319 01320 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 01321 01322 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ 01323 uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */ 01324 if (wc) { 01325 if (i >= _MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) /* Compare it */ 01326 return 0; /* Not matched */ 01327 wc = uc; 01328 } else { 01329 if (uc != 0xFFFF) return 0; /* Check filler */ 01330 } 01331 } 01332 01333 if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) /* Last segment matched but different length */ 01334 return 0; 01335 01336 return 1; /* The part of LFN matched */ 01337 } 01338 01339 01340 01341 static 01342 int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */ 01343 WCHAR* lfnbuf, /* Pointer to the LFN working buffer */ 01344 BYTE* dir /* Pointer to the LFN entry */ 01345 ) 01346 { 01347 UINT i, s; 01348 WCHAR wc, uc; 01349 01350 01351 if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */ 01352 01353 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 01354 01355 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ 01356 uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */ 01357 if (wc) { 01358 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 01359 lfnbuf[i++] = wc = uc; /* Store it */ 01360 } else { 01361 if (uc != 0xFFFF) return 0; /* Check filler */ 01362 } 01363 } 01364 01365 if (dir[LDIR_Ord] & LLEF) { /* Put terminator if it is the last LFN part */ 01366 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 01367 lfnbuf[i] = 0; 01368 } 01369 01370 return 1; /* The part of LFN is valid */ 01371 } 01372 01373 01374 #if !_FS_READONLY 01375 static 01376 void fit_lfn ( 01377 const WCHAR* lfnbuf, /* Pointer to the LFN working buffer */ 01378 BYTE* dir, /* Pointer to the LFN entry to be processed */ 01379 BYTE ord, /* LFN order (1-20) */ 01380 BYTE sum /* Checksum of the corresponding SFN */ 01381 ) 01382 { 01383 UINT i, s; 01384 WCHAR wc; 01385 01386 01387 dir[LDIR_Chksum] = sum; /* Set checksum */ 01388 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ 01389 dir[LDIR_Type] = 0; 01390 ST_WORD(dir + LDIR_FstClusLO, 0); 01391 01392 i = (ord - 1) * 13; /* Get offset in the LFN working buffer */ 01393 s = wc = 0; 01394 do { 01395 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective character */ 01396 ST_WORD(dir+LfnOfs[s], wc); /* Put it */ 01397 if (!wc) wc = 0xFFFF; /* Padding characters following last character */ 01398 } while (++s < 13); 01399 if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLEF; /* Bottom LFN part is the start of LFN sequence */ 01400 dir[LDIR_Ord] = ord; /* Set the LFN order */ 01401 } 01402 01403 #endif 01404 #endif 01405 01406 01407 01408 01409 /*-----------------------------------------------------------------------*/ 01410 /* Create numbered name */ 01411 /*-----------------------------------------------------------------------*/ 01412 #if _USE_LFN 01413 static 01414 void gen_numname ( 01415 BYTE* dst, /* Pointer to the buffer to store numbered SFN */ 01416 const BYTE* src, /* Pointer to SFN */ 01417 const WCHAR* lfn, /* Pointer to LFN */ 01418 UINT seq /* Sequence number */ 01419 ) 01420 { 01421 BYTE ns[8], c; 01422 UINT i, j; 01423 WCHAR wc; 01424 DWORD sr; 01425 01426 01427 mem_cpy(dst, src, 11); 01428 01429 if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */ 01430 sr = seq; 01431 while (*lfn) { /* Create a CRC */ 01432 wc = *lfn++; 01433 for (i = 0; i < 16; i++) { 01434 sr = (sr << 1) + (wc & 1); 01435 wc >>= 1; 01436 if (sr & 0x10000) sr ^= 0x11021; 01437 } 01438 } 01439 seq = (UINT)sr; 01440 } 01441 01442 /* itoa (hexdecimal) */ 01443 i = 7; 01444 do { 01445 c = (seq % 16) + '0'; 01446 if (c > '9') c += 7; 01447 ns[i--] = c; 01448 seq /= 16; 01449 } while (seq); 01450 ns[i] = '~'; 01451 01452 /* Append the number */ 01453 for (j = 0; j < i && dst[j] != ' '; j++) { 01454 if (IsDBCS1(dst[j])) { 01455 if (j == i - 1) break; 01456 j++; 01457 } 01458 } 01459 do { 01460 dst[j++] = (i < 8) ? ns[i++] : ' '; 01461 } while (j < 8); 01462 } 01463 #endif 01464 01465 01466 01467 01468 /*-----------------------------------------------------------------------*/ 01469 /* Calculate checksum of an SFN entry */ 01470 /*-----------------------------------------------------------------------*/ 01471 #if _USE_LFN 01472 static 01473 BYTE sum_sfn ( 01474 const BYTE* dir /* Pointer to the SFN entry */ 01475 ) 01476 { 01477 BYTE sum = 0; 01478 UINT n = 11; 01479 01480 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n); 01481 return sum; 01482 } 01483 #endif 01484 01485 01486 01487 01488 /*-----------------------------------------------------------------------*/ 01489 /* Directory handling - Find an object in the directory */ 01490 /*-----------------------------------------------------------------------*/ 01491 01492 static 01493 FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */ 01494 FATFS_DIR* dp /* Pointer to the directory object linked to the file name */ 01495 ) 01496 { 01497 FRESULT res; 01498 BYTE c, *dir; 01499 #if _USE_LFN 01500 BYTE a, ord, sum; 01501 #endif 01502 01503 res = dir_sdi(dp, 0); /* Rewind directory object */ 01504 if (res != FR_OK) return res; 01505 01506 #if _USE_LFN 01507 ord = sum = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */ 01508 #endif 01509 do { 01510 res = move_window(dp->fs, dp->sect); 01511 if (res != FR_OK) break; 01512 dir = dp->dir; /* Ptr to the directory entry of current index */ 01513 c = dir[DIR_Name]; 01514 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 01515 #if _USE_LFN /* LFN configuration */ 01516 a = dir[DIR_Attr] & AM_MASK; 01517 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 01518 ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */ 01519 } else { 01520 if (a == AM_LFN) { /* An LFN entry is found */ 01521 if (dp->lfn) { 01522 if (c & LLEF) { /* Is it start of LFN sequence? */ 01523 sum = dir[LDIR_Chksum]; 01524 c &= ~LLEF; ord = c; /* LFN start order */ 01525 dp->lfn_idx = dp->index; /* Start index of LFN */ 01526 } 01527 /* Check validity of the LFN entry and compare it with given name */ 01528 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF; 01529 } 01530 } else { /* An SFN entry is found */ 01531 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */ 01532 if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dir, dp->fn, 11)) break; /* SFN matched? */ 01533 ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */ 01534 } 01535 } 01536 #else /* Non LFN configuration */ 01537 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dp->fn, 11)) /* Is it a valid entry? */ 01538 break; 01539 #endif 01540 res = dir_next(dp, 0); /* Next entry */ 01541 } while (res == FR_OK); 01542 01543 return res; 01544 } 01545 01546 01547 01548 01549 /*-----------------------------------------------------------------------*/ 01550 /* Read an object from the directory */ 01551 /*-----------------------------------------------------------------------*/ 01552 #if _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 01553 static 01554 FRESULT dir_read ( 01555 FATFS_DIR* dp, /* Pointer to the directory object */ 01556 int vol /* Filtered by 0:file/directory or 1:volume label */ 01557 ) 01558 { 01559 FRESULT res; 01560 BYTE a, c, *dir; 01561 #if _USE_LFN 01562 BYTE ord = 0xFF, sum = 0xFF; 01563 #endif 01564 01565 res = FR_NO_FILE; 01566 while (dp->sect) { 01567 res = move_window(dp->fs, dp->sect); 01568 if (res != FR_OK) break; 01569 dir = dp->dir; /* Ptr to the directory entry of current index */ 01570 c = dir[DIR_Name]; 01571 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 01572 a = dir[DIR_Attr] & AM_MASK; 01573 #if _USE_LFN /* LFN configuration */ 01574 if (c == DDEM || (!_FS_RPATH && c == '.') || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */ 01575 ord = 0xFF; 01576 } else { 01577 if (a == AM_LFN) { /* An LFN entry is found */ 01578 if (c & LLEF) { /* Is it start of LFN sequence? */ 01579 sum = dir[LDIR_Chksum]; 01580 c &= ~LLEF; ord = c; 01581 dp->lfn_idx = dp->index; 01582 } 01583 /* Check LFN validity and capture it */ 01584 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF; 01585 } else { /* An SFN entry is found */ 01586 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */ 01587 dp->lfn_idx = 0xFFFF; /* It has no LFN. */ 01588 break; 01589 } 01590 } 01591 #else /* Non LFN configuration */ 01592 if (c != DDEM && (_FS_RPATH || c != '.') && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) /* Is it a valid entry? */ 01593 break; 01594 #endif 01595 res = dir_next(dp, 0); /* Next entry */ 01596 if (res != FR_OK) break; 01597 } 01598 01599 if (res != FR_OK) dp->sect = 0; 01600 01601 return res; 01602 } 01603 #endif /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */ 01604 01605 01606 01607 01608 /*-----------------------------------------------------------------------*/ 01609 /* Register an object to the directory */ 01610 /*-----------------------------------------------------------------------*/ 01611 #if !_FS_READONLY 01612 static 01613 FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */ 01614 FATFS_DIR* dp /* Target directory with object name to be created */ 01615 ) 01616 { 01617 FRESULT res; 01618 #if _USE_LFN /* LFN configuration */ 01619 UINT n, nent; 01620 BYTE sn[12], *fn, sum; 01621 WCHAR *lfn; 01622 01623 01624 fn = dp->fn; lfn = dp->lfn; 01625 mem_cpy(sn, fn, 12); 01626 01627 if (_FS_RPATH && (sn[NSFLAG] & NS_DOT)) /* Cannot create dot entry */ 01628 return FR_INVALID_NAME; 01629 01630 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ 01631 fn[NSFLAG] = 0; dp->lfn = 0; /* Find only SFN */ 01632 for (n = 1; n < 100; n++) { 01633 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */ 01634 res = dir_find(dp); /* Check if the name collides with existing SFN */ 01635 if (res != FR_OK) break; 01636 } 01637 if (n == 100) return FR_DENIED; /* Abort if too many collisions */ 01638 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ 01639 fn[NSFLAG] = sn[NSFLAG]; dp->lfn = lfn; 01640 } 01641 01642 if (sn[NSFLAG] & NS_LFN) { /* When LFN is to be created, allocate entries for an SFN + LFNs. */ 01643 for (n = 0; lfn[n]; n++) ; 01644 nent = (n + 25) / 13; 01645 } else { /* Otherwise allocate an entry for an SFN */ 01646 nent = 1; 01647 } 01648 res = dir_alloc(dp, nent); /* Allocate entries */ 01649 01650 if (res == FR_OK && --nent) { /* Set LFN entry if needed */ 01651 res = dir_sdi(dp, dp->index - nent); 01652 if (res == FR_OK) { 01653 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */ 01654 do { /* Store LFN entries in bottom first */ 01655 res = move_window(dp->fs, dp->sect); 01656 if (res != FR_OK) break; 01657 fit_lfn(dp->lfn, dp->dir, (BYTE)nent, sum); 01658 dp->fs->wflag = 1; 01659 res = dir_next(dp, 0); /* Next entry */ 01660 } while (res == FR_OK && --nent); 01661 } 01662 } 01663 #else /* Non LFN configuration */ 01664 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */ 01665 #endif 01666 01667 if (res == FR_OK) { /* Set SFN entry */ 01668 res = move_window(dp->fs, dp->sect); 01669 if (res == FR_OK) { 01670 mem_set(dp->dir, 0, SZ_DIRE); /* Clean the entry */ 01671 mem_cpy(dp->dir, dp->fn, 11); /* Put SFN */ 01672 #if _USE_LFN 01673 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */ 01674 #endif 01675 dp->fs->wflag = 1; 01676 } 01677 } 01678 01679 return res; 01680 } 01681 #endif /* !_FS_READONLY */ 01682 01683 01684 01685 01686 /*-----------------------------------------------------------------------*/ 01687 /* Remove an object from the directory */ 01688 /*-----------------------------------------------------------------------*/ 01689 #if !_FS_READONLY && !_FS_MINIMIZE 01690 static 01691 FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */ 01692 FATFS_DIR* dp /* Directory object pointing the entry to be removed */ 01693 ) 01694 { 01695 FRESULT res; 01696 #if _USE_LFN /* LFN configuration */ 01697 UINT i; 01698 01699 i = dp->index; /* SFN index */ 01700 res = dir_sdi(dp, (dp->lfn_idx == 0xFFFF) ? i : dp->lfn_idx); /* Goto the SFN or top of the LFN entries */ 01701 if (res == FR_OK) { 01702 do { 01703 res = move_window(dp->fs, dp->sect); 01704 if (res != FR_OK) break; 01705 mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */ 01706 *dp->dir = DDEM; 01707 dp->fs->wflag = 1; 01708 if (dp->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */ 01709 res = dir_next(dp, 0); /* Next entry */ 01710 } while (res == FR_OK); 01711 if (res == FR_NO_FILE) res = FR_INT_ERR; 01712 } 01713 01714 #else /* Non LFN configuration */ 01715 res = dir_sdi(dp, dp->index); 01716 if (res == FR_OK) { 01717 res = move_window(dp->fs, dp->sect); 01718 if (res == FR_OK) { 01719 mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */ 01720 *dp->dir = DDEM; 01721 dp->fs->wflag = 1; 01722 } 01723 } 01724 #endif 01725 01726 return res; 01727 } 01728 #endif /* !_FS_READONLY */ 01729 01730 01731 01732 01733 /*-----------------------------------------------------------------------*/ 01734 /* Get file information from directory entry */ 01735 /*-----------------------------------------------------------------------*/ 01736 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 01737 static 01738 void get_fileinfo ( /* No return code */ 01739 FATFS_DIR* dp, /* Pointer to the directory object */ 01740 FILINFO* fno /* Pointer to the file information to be filled */ 01741 ) 01742 { 01743 UINT i; 01744 TCHAR *p, c; 01745 BYTE *dir; 01746 #if _USE_LFN 01747 WCHAR w, *lfn; 01748 #endif 01749 01750 p = fno->fname; 01751 if (dp->sect) { /* Get SFN */ 01752 dir = dp->dir; 01753 i = 0; 01754 while (i < 11) { /* Copy name body and extension */ 01755 c = (TCHAR)dir[i++]; 01756 if (c == ' ') continue; /* Skip padding spaces */ 01757 if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */ 01758 if (i == 9) *p++ = '.'; /* Insert a . if extension is exist */ 01759 #if _USE_LFN 01760 if (IsUpper(c) && (dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY))) 01761 c += 0x20; /* To lower */ 01762 #if _LFN_UNICODE 01763 if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dir[i])) 01764 c = c << 8 | dir[i++]; 01765 c = ff_convert(c, 1); /* OEM -> Unicode */ 01766 if (!c) c = '?'; 01767 #endif 01768 #endif 01769 *p++ = c; 01770 } 01771 fno->fattrib = dir[DIR_Attr]; /* Attribute */ 01772 fno->fsize = LD_DWORD(dir + DIR_FileSize); /* Size */ 01773 fno->fdate = LD_WORD(dir + DIR_WrtDate); /* Date */ 01774 fno->ftime = LD_WORD(dir + DIR_WrtTime); /* Time */ 01775 } 01776 *p = 0; /* Terminate SFN string by a \0 */ 01777 01778 #if _USE_LFN 01779 if (fno->lfname) { 01780 i = 0; p = fno->lfname; 01781 if (dp->sect && fno->lfsize && dp->lfn_idx != 0xFFFF) { /* Get LFN if available */ 01782 lfn = dp->lfn; 01783 while ((w = *lfn++) != 0) { /* Get an LFN character */ 01784 #if !_LFN_UNICODE 01785 w = ff_convert(w, 0); /* Unicode -> OEM */ 01786 if (!w) { i = 0; break; } /* No LFN if it could not be converted */ 01787 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */ 01788 p[i++] = (TCHAR)(w >> 8); 01789 #endif 01790 if (i >= fno->lfsize - 1) { i = 0; break; } /* No LFN if buffer overflow */ 01791 p[i++] = (TCHAR)w; 01792 } 01793 } 01794 p[i] = 0; /* Terminate LFN string by a \0 */ 01795 } 01796 #endif 01797 } 01798 #endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */ 01799 01800 01801 01802 01803 /*-----------------------------------------------------------------------*/ 01804 /* Pattern matching */ 01805 /*-----------------------------------------------------------------------*/ 01806 #if _USE_FIND && _FS_MINIMIZE <= 1 01807 static 01808 WCHAR get_achar ( /* Get a character and advances ptr 1 or 2 */ 01809 const TCHAR** ptr /* Pointer to pointer to the SBCS/DBCS/Unicode string */ 01810 ) 01811 { 01812 WCHAR chr; 01813 01814 #if !_LFN_UNICODE 01815 chr = (BYTE)*(*ptr)++; /* Get a byte */ 01816 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */ 01817 if (IsDBCS1(chr) && IsDBCS2(**ptr)) /* Get DBC 2nd byte if needed */ 01818 chr = chr << 8 | (BYTE)*(*ptr)++; 01819 #ifdef _EXCVT 01820 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */ 01821 #endif 01822 #else 01823 chr = ff_wtoupper(*(*ptr)++); /* Get a word and to upper */ 01824 #endif 01825 return chr; 01826 } 01827 01828 01829 static 01830 int pattern_matching ( /* 0:mismatched, 1:matched */ 01831 const TCHAR* pat, /* Matching pattern */ 01832 const TCHAR* nam, /* String to be tested */ 01833 int skip, /* Number of pre-skip chars (number of ?s) */ 01834 int inf /* Infinite search (* specified) */ 01835 ) 01836 { 01837 const TCHAR *pp, *np; 01838 WCHAR pc, nc; 01839 int nm, nx; 01840 01841 01842 while (skip--) { /* Pre-skip name chars */ 01843 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */ 01844 } 01845 if (!*pat && inf) return 1; /* (short circuit) */ 01846 01847 do { 01848 pp = pat; np = nam; /* Top of pattern and name to match */ 01849 for (;;) { 01850 if (*pp == '?' || *pp == '*') { /* Wildcard? */ 01851 nm = nx = 0; 01852 do { /* Analyze the wildcard chars */ 01853 if (*pp++ == '?') nm++; else nx = 1; 01854 } while (*pp == '?' || *pp == '*'); 01855 if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */ 01856 nc = *np; break; /* Branch mismatched */ 01857 } 01858 pc = get_achar(&pp); /* Get a pattern char */ 01859 nc = get_achar(&np); /* Get a name char */ 01860 if (pc != nc) break; /* Branch mismatched? */ 01861 if (!pc) return 1; /* Branch matched? (matched at end of both strings) */ 01862 } 01863 get_achar(&nam); /* nam++ */ 01864 } while (inf && nc); /* Retry until end of name if infinite search is specified */ 01865 01866 return 0; 01867 } 01868 #endif /* _USE_FIND && _FS_MINIMIZE <= 1 */ 01869 01870 01871 01872 01873 /*-----------------------------------------------------------------------*/ 01874 /* Pick a top segment and create the object name in directory form */ 01875 /*-----------------------------------------------------------------------*/ 01876 01877 static 01878 FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */ 01879 FATFS_DIR* dp, /* Pointer to the directory object */ 01880 const TCHAR** path /* Pointer to pointer to the segment in the path string */ 01881 ) 01882 { 01883 #if _USE_LFN /* LFN configuration */ 01884 BYTE b, cf; 01885 WCHAR w, *lfn; 01886 UINT i, ni, si, di; 01887 const TCHAR *p; 01888 01889 /* Create LFN in Unicode */ 01890 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ 01891 lfn = dp->lfn; 01892 si = di = 0; 01893 for (;;) { 01894 w = p[si++]; /* Get a character */ 01895 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */ 01896 if (di >= _MAX_LFN) /* Reject too long name */ 01897 return FR_INVALID_NAME; 01898 #if !_LFN_UNICODE 01899 w &= 0xFF; 01900 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ 01901 b = (BYTE)p[si++]; /* Get 2nd byte */ 01902 w = (w << 8) + b; /* Create a DBC */ 01903 if (!IsDBCS2(b)) 01904 return FR_INVALID_NAME; /* Reject invalid sequence */ 01905 } 01906 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */ 01907 if (!w) return FR_INVALID_NAME; /* Reject invalid code */ 01908 #endif 01909 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal characters for LFN */ 01910 return FR_INVALID_NAME; 01911 lfn[di++] = w; /* Store the Unicode character */ 01912 } 01913 *path = &p[si]; /* Return pointer to the next segment */ 01914 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 01915 #if _FS_RPATH 01916 if ((di == 1 && lfn[di - 1] == '.') || 01917 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot entry? */ 01918 lfn[di] = 0; 01919 for (i = 0; i < 11; i++) /* Create dot name for SFN entry */ 01920 dp->fn[i] = (i < di) ? '.' : ' '; 01921 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */ 01922 return FR_OK; 01923 } 01924 #endif 01925 while (di) { /* Snip off trailing spaces and dots if exist */ 01926 w = lfn[di - 1]; 01927 if (w != ' ' && w != '.') break; 01928 di--; 01929 } 01930 if (!di) return FR_INVALID_NAME; /* Reject nul string */ 01931 lfn[di] = 0; /* LFN is created */ 01932 01933 /* Create SFN in directory form */ 01934 mem_set(dp->fn, ' ', 11); 01935 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */ 01936 if (si) cf |= NS_LOSS | NS_LFN; 01937 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */ 01938 01939 b = i = 0; ni = 8; 01940 for (;;) { 01941 w = lfn[si++]; /* Get an LFN character */ 01942 if (!w) break; /* Break on end of the LFN */ 01943 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */ 01944 cf |= NS_LOSS | NS_LFN; continue; 01945 } 01946 01947 if (i >= ni || si == di) { /* Extension or end of SFN */ 01948 if (ni == 11) { /* Long extension */ 01949 cf |= NS_LOSS | NS_LFN; break; 01950 } 01951 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */ 01952 if (si > di) break; /* No extension */ 01953 si = di; i = 8; ni = 11; /* Enter extension section */ 01954 b <<= 2; continue; 01955 } 01956 01957 if (w >= 0x80) { /* Non ASCII character */ 01958 #ifdef _EXCVT 01959 w = ff_convert(w, 0); /* Unicode -> OEM code */ 01960 if (w) w = ExCvt[w - 0x80]; /* Convert extended character to upper (SBCS) */ 01961 #else 01962 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */ 01963 #endif 01964 cf |= NS_LFN; /* Force create LFN entry */ 01965 } 01966 01967 if (_DF1S && w >= 0x100) { /* Is this DBC? (always false at SBCS cfg) */ 01968 if (i >= ni - 1) { 01969 cf |= NS_LOSS | NS_LFN; i = ni; continue; 01970 } 01971 dp->fn[i++] = (BYTE)(w >> 8); 01972 } else { /* SBC */ 01973 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */ 01974 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ 01975 } else { 01976 if (IsUpper(w)) { /* ASCII large capital */ 01977 b |= 2; 01978 } else { 01979 if (IsLower(w)) { /* ASCII small capital */ 01980 b |= 1; w -= 0x20; 01981 } 01982 } 01983 } 01984 } 01985 dp->fn[i++] = (BYTE)w; 01986 } 01987 01988 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */ 01989 01990 if (ni == 8) b <<= 2; 01991 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */ 01992 cf |= NS_LFN; 01993 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */ 01994 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */ 01995 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */ 01996 } 01997 01998 dp->fn[NSFLAG] = cf; /* SFN is created */ 01999 02000 return FR_OK; 02001 02002 02003 #else /* Non-LFN configuration */ 02004 BYTE b, c, d, *sfn; 02005 UINT ni, si, i; 02006 const char *p; 02007 02008 /* Create file name in directory form */ 02009 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Skip duplicated separator */ 02010 sfn = dp->fn; 02011 mem_set(sfn, ' ', 11); 02012 si = i = b = 0; ni = 8; 02013 #if _FS_RPATH 02014 if (p[si] == '.') { /* Is this a dot entry? */ 02015 for (;;) { 02016 c = (BYTE)p[si++]; 02017 if (c != '.' || si >= 3) break; 02018 sfn[i++] = c; 02019 } 02020 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; 02021 *path = &p[si]; /* Return pointer to the next segment */ 02022 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */ 02023 return FR_OK; 02024 } 02025 #endif 02026 for (;;) { 02027 c = (BYTE)p[si++]; 02028 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */ 02029 if (c == '.' || i >= ni) { 02030 if (ni != 8 || c != '.') return FR_INVALID_NAME; 02031 i = 8; ni = 11; 02032 b <<= 2; continue; 02033 } 02034 if (c >= 0x80) { /* Extended character? */ 02035 b |= 3; /* Eliminate NT flag */ 02036 #ifdef _EXCVT 02037 c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */ 02038 #else 02039 #if !_DF1S 02040 return FR_INVALID_NAME; /* Reject extended characters (ASCII cfg) */ 02041 #endif 02042 #endif 02043 } 02044 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false at SBCS cfg.) */ 02045 d = (BYTE)p[si++]; /* Get 2nd byte */ 02046 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */ 02047 return FR_INVALID_NAME; 02048 sfn[i++] = c; 02049 sfn[i++] = d; 02050 } else { /* SBC */ 02051 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */ 02052 return FR_INVALID_NAME; 02053 if (IsUpper(c)) { /* ASCII large capital? */ 02054 b |= 2; 02055 } else { 02056 if (IsLower(c)) { /* ASCII small capital? */ 02057 b |= 1; c -= 0x20; 02058 } 02059 } 02060 sfn[i++] = c; 02061 } 02062 } 02063 *path = &p[si]; /* Return pointer to the next segment */ 02064 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 02065 02066 if (!i) return FR_INVALID_NAME; /* Reject nul string */ 02067 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* When first character collides with DDEM, replace it with RDDEM */ 02068 02069 if (ni == 8) b <<= 2; 02070 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */ 02071 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */ 02072 02073 sfn[NSFLAG] = c; /* Store NT flag, File name is created */ 02074 02075 return FR_OK; 02076 #endif 02077 } 02078 02079 02080 02081 02082 /*-----------------------------------------------------------------------*/ 02083 /* Follow a file path */ 02084 /*-----------------------------------------------------------------------*/ 02085 02086 static 02087 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ 02088 FATFS_DIR* dp, /* Directory object to return last directory and found object */ 02089 const TCHAR* path /* Full-path string to find a file or directory */ 02090 ) 02091 { 02092 FRESULT res; 02093 BYTE *dir, ns; 02094 02095 02096 #if _FS_RPATH 02097 if (*path == '/' || *path == '\\') { /* There is a heading separator */ 02098 path++; dp->sclust = 0; /* Strip it and start from the root directory */ 02099 } else { /* No heading separator */ 02100 dp->sclust = dp->fs->cdir; /* Start from the current directory */ 02101 } 02102 #else 02103 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */ 02104 path++; 02105 dp->sclust = 0; /* Always start from the root directory */ 02106 #endif 02107 02108 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */ 02109 res = dir_sdi(dp, 0); 02110 dp->dir = 0; 02111 } else { /* Follow path */ 02112 for (;;) { 02113 res = create_name(dp, &path); /* Get a segment name of the path */ 02114 if (res != FR_OK) break; 02115 res = dir_find(dp); /* Find an object with the sagment name */ 02116 ns = dp->fn[NSFLAG]; 02117 if (res != FR_OK) { /* Failed to find the object */ 02118 if (res == FR_NO_FILE) { /* Object is not found */ 02119 if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, */ 02120 dp->sclust = 0; dp->dir = 0; /* it is the root directory and stay there */ 02121 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */ 02122 res = FR_OK; /* Ended at the root directroy. Function completed. */ 02123 } else { /* Could not find the object */ 02124 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */ 02125 } 02126 } 02127 break; 02128 } 02129 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */ 02130 dir = dp->dir; /* Follow the sub-directory */ 02131 if (!(dir[DIR_Attr] & AM_DIR)) { /* It is not a sub-directory and cannot follow */ 02132 res = FR_NO_PATH; break; 02133 } 02134 dp->sclust = ld_clust(dp->fs, dir); 02135 } 02136 } 02137 02138 return res; 02139 } 02140 02141 02142 02143 02144 /*-----------------------------------------------------------------------*/ 02145 /* Get logical drive number from path name */ 02146 /*-----------------------------------------------------------------------*/ 02147 02148 static 02149 int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */ 02150 const TCHAR** path /* Pointer to pointer to the path name */ 02151 ) 02152 { 02153 const TCHAR *tp, *tt; 02154 UINT i; 02155 int vol = -1; 02156 #if _STR_VOLUME_ID /* Find string drive id */ 02157 static const char* const str[] = {_VOLUME_STRS}; 02158 const char *sp; 02159 char c; 02160 TCHAR tc; 02161 #endif 02162 02163 INFO("get_ldnumber(%s)", *path); 02164 if (*path) { /* If the pointer is not a null */ 02165 for (tt = *path; (UINT)*tt >= (_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find ':' in the path */ 02166 if (*tt == ':') { /* If a ':' is exist in the path name */ 02167 tp = *path; 02168 i = *tp++ - '0'; 02169 if (i < 10 && tp == tt) { /* Is there a numeric drive id? */ 02170 if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */ 02171 vol = (int)i; 02172 *path = ++tt; 02173 } 02174 } 02175 #if _STR_VOLUME_ID 02176 else { /* No numeric drive number, find string drive id */ 02177 i = 0; tt++; 02178 do { 02179 sp = str[i]; tp = *path; 02180 do { /* Compare a string drive id with path name */ 02181 c = *sp++; tc = *tp++; 02182 if (IsLower(tc)) tc -= 0x20; 02183 } while (c && (TCHAR)c == tc); 02184 } while ((c || tp != tt) && ++i < _VOLUMES); /* Repeat for each id until pattern match */ 02185 if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */ 02186 vol = (int)i; 02187 *path = tt; 02188 } 02189 } 02190 #endif 02191 INFO(" ret: %d", vol); 02192 return vol; 02193 } 02194 #if _FS_RPATH && _VOLUMES >= 2 02195 INFO(" CurrVol: %d", CurrVol); 02196 vol = CurrVol; /* Current drive */ 02197 #else 02198 vol = 0; /* Drive 0 */ 02199 #endif 02200 } 02201 INFO(" ret: %d", vol); 02202 return vol; 02203 } 02204 02205 02206 02207 02208 /*-----------------------------------------------------------------------*/ 02209 /* Load a sector and check if it is an FAT boot sector */ 02210 /*-----------------------------------------------------------------------*/ 02211 02212 static 02213 BYTE check_fs ( /* 0:Valid FAT-BS, 1:Valid BS but not FAT, 2:Not a BS, 3:Disk error */ 02214 FATFS* fs, /* File system object */ 02215 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ 02216 ) 02217 { 02218 fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */ 02219 if (move_window(fs, sect) != FR_OK) /* Load boot record */ 02220 return 3; 02221 02222 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */ 02223 return 2; 02224 02225 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ 02226 return 0; 02227 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ 02228 return 0; 02229 02230 return 1; 02231 } 02232 02233 02234 02235 02236 /*-----------------------------------------------------------------------*/ 02237 /* Find logical drive and check if the volume is mounted */ 02238 /*-----------------------------------------------------------------------*/ 02239 02240 static 02241 FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */ 02242 FATFS** rfs, /* Pointer to pointer to the found file system object */ 02243 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */ 02244 BYTE wmode /* !=0: Check write protection for write access */ 02245 ) 02246 { 02247 BYTE fmt, *pt; 02248 int vol; 02249 DSTATUS stat; 02250 DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4]; 02251 WORD nrsv; 02252 FATFS *fs; 02253 UINT i; 02254 02255 INFO("find_volume(%p,%s,%02X)", *rfs, *path, wmode); 02256 /* Get logical drive number from the path name */ 02257 *rfs = 0; 02258 vol = get_ldnumber(path); 02259 INFO(" vol = %d", vol); 02260 if (vol < 0) return FR_INVALID_DRIVE; 02261 02262 /* Check if the file system object is valid or not */ 02263 fs = FatFs[vol]; /* Get pointer to the file system object */ 02264 INFO("FatFs[%d] = %p", vol, fs); 02265 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */ 02266 02267 ENTER_FF(fs); /* Lock the volume */ 02268 *rfs = fs; /* Return pointer to the file system object */ 02269 02270 if (fs->fs_type) { /* If the volume has been mounted */ 02271 stat = disk_status(fs->drv); 02272 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */ 02273 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */ 02274 return FR_WRITE_PROTECTED; 02275 return FR_OK; /* The file system object is valid */ 02276 } 02277 } 02278 02279 /* The file system object is not valid. */ 02280 /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */ 02281 02282 fs->fs_type = 0; /* Clear the file system object */ 02283 fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */ 02284 stat = disk_initialize(fs->drv); /* Initialize the physical drive */ 02285 if (stat & STA_NOINIT) /* Check if the initialization succeeded */ 02286 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */ 02287 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */ 02288 return FR_WRITE_PROTECTED; 02289 #if _MAX_SS != _MIN_SS /* Get sector size (multiple sector size cfg only) */ 02290 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK 02291 || SS(fs) < _MIN_SS || SS(fs) > _MAX_SS) return FR_DISK_ERR; 02292 #endif 02293 /* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */ 02294 bsect = 0; 02295 fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT boot sector as SFD */ 02296 if (fmt == 1 || (!fmt && (LD2PT(vol)))) { /* Not an FAT boot sector or forced partition number */ 02297 for (i = 0; i < 4; i++) { /* Get partition offset */ 02298 pt = fs->win + MBR_Table + i * SZ_PTE; 02299 br[i] = pt[4] ? LD_DWORD(&pt[8]) : 0; 02300 } 02301 i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */ 02302 if (i) i--; 02303 do { /* Find an FAT volume */ 02304 bsect = br[i]; 02305 fmt = bsect ? check_fs(fs, bsect) : 2; /* Check the partition */ 02306 } while (!LD2PT(vol) && fmt && ++i < 4); 02307 } 02308 if (fmt == 3) return FR_DISK_ERR; /* An error occured in the disk I/O layer */ 02309 if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */ 02310 02311 /* An FAT volume is found. Following code initializes the file system object */ 02312 02313 if (LD_WORD(fs->win + BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */ 02314 return FR_NO_FILESYSTEM; 02315 02316 fasize = LD_WORD(fs->win + BPB_FATSz16); /* Number of sectors per FAT */ 02317 if (!fasize) fasize = LD_DWORD(fs->win + BPB_FATSz32); 02318 fs->fsize = fasize; 02319 02320 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */ 02321 if (fs->n_fats != 1 && fs->n_fats != 2) /* (Must be 1 or 2) */ 02322 return FR_NO_FILESYSTEM; 02323 fasize *= fs->n_fats; /* Number of sectors for FAT area */ 02324 02325 fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */ 02326 if (!fs->csize || (fs->csize & (fs->csize - 1))) /* (Must be power of 2) */ 02327 return FR_NO_FILESYSTEM; 02328 02329 fs->n_rootdir = LD_WORD(fs->win + BPB_RootEntCnt); /* Number of root directory entries */ 02330 if (fs->n_rootdir % (SS(fs) / SZ_DIRE)) /* (Must be sector aligned) */ 02331 return FR_NO_FILESYSTEM; 02332 02333 tsect = LD_WORD(fs->win + BPB_TotSec16); /* Number of sectors on the volume */ 02334 if (!tsect) tsect = LD_DWORD(fs->win + BPB_TotSec32); 02335 02336 nrsv = LD_WORD(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */ 02337 if (!nrsv) return FR_NO_FILESYSTEM; /* (Must not be 0) */ 02338 02339 /* Determine the FAT sub type */ 02340 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIRE); /* RSV + FAT + FATFS_DIR */ 02341 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 02342 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ 02343 if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 02344 fmt = FS_FAT12; 02345 if (nclst >= MIN_FAT16) fmt = FS_FAT16; 02346 if (nclst >= MIN_FAT32) fmt = FS_FAT32; 02347 02348 /* Boundaries and Limits */ 02349 fs->n_fatent = nclst + 2; /* Number of FAT entries */ 02350 fs->volbase = bsect; /* Volume start sector */ 02351 fs->fatbase = bsect + nrsv; /* FAT start sector */ 02352 fs->database = bsect + sysect; /* Data start sector */ 02353 if (fmt == FS_FAT32) { 02354 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ 02355 fs->dirbase = LD_DWORD(fs->win + BPB_RootClus); /* Root directory start cluster */ 02356 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */ 02357 } else { 02358 if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */ 02359 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ 02360 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */ 02361 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); 02362 } 02363 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than the size needed) */ 02364 return FR_NO_FILESYSTEM; 02365 02366 #if !_FS_READONLY 02367 /* Initialize cluster allocation information */ 02368 fs->last_clust = fs->free_clust = 0xFFFFFFFF; 02369 02370 /* Get fsinfo if available */ 02371 fs->fsi_flag = 0x80; 02372 #if (_FS_NOFSINFO & 3) != 3 02373 if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo == 1 */ 02374 && LD_WORD(fs->win + BPB_FSInfo) == 1 02375 && move_window(fs, bsect + 1) == FR_OK) 02376 { 02377 fs->fsi_flag = 0; 02378 if (LD_WORD(fs->win + BS_55AA) == 0xAA55 /* Load FSINFO data if available */ 02379 && LD_DWORD(fs->win + FSI_LeadSig) == 0x41615252 02380 && LD_DWORD(fs->win + FSI_StrucSig) == 0x61417272) 02381 { 02382 #if (_FS_NOFSINFO & 1) == 0 02383 fs->free_clust = LD_DWORD(fs->win + FSI_Free_Count); 02384 #endif 02385 #if (_FS_NOFSINFO & 2) == 0 02386 fs->last_clust = LD_DWORD(fs->win + FSI_Nxt_Free); 02387 #endif 02388 } 02389 } 02390 #endif 02391 #endif 02392 fs->fs_type = fmt; /* FAT sub-type */ 02393 fs->id = ++Fsid; /* File system mount ID */ 02394 #if _FS_RPATH 02395 fs->cdir = 0; /* Set current directory to root */ 02396 #endif 02397 #if _FS_LOCK /* Clear file lock semaphores */ 02398 clear_lock(fs); 02399 #endif 02400 02401 return FR_OK; 02402 } 02403 02404 02405 02406 02407 /*-----------------------------------------------------------------------*/ 02408 /* Check if the file/directory object is valid or not */ 02409 /*-----------------------------------------------------------------------*/ 02410 02411 static 02412 FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */ 02413 void* obj /* Pointer to the object FIL/FATFS_DIR to check validity */ 02414 ) 02415 { 02416 FIL *fil = (FIL*)obj; /* Assuming offset of .fs and .id in the FIL/FATFS_DIR structure is identical */ 02417 02418 02419 if (!fil || !fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id || (disk_status(fil->fs->drv) & STA_NOINIT)) 02420 return FR_INVALID_OBJECT; 02421 02422 ENTER_FF(fil->fs); /* Lock file system */ 02423 02424 return FR_OK; 02425 } 02426 02427 02428 02429 02430 /*-------------------------------------------------------------------------- 02431 02432 Public Functions 02433 02434 ---------------------------------------------------------------------------*/ 02435 02436 02437 02438 /*-----------------------------------------------------------------------*/ 02439 /* Mount/Unmount a Logical Drive */ 02440 /*-----------------------------------------------------------------------*/ 02441 02442 FRESULT f_mount ( 02443 FATFS* fs, /* Pointer to the file system object (NULL:unmount)*/ 02444 const TCHAR* path, /* Logical drive number to be mounted/unmounted */ 02445 BYTE opt /* 0:Do not mount (delayed mount), 1:Mount immediately */ 02446 ) 02447 { 02448 FATFS *cfs; 02449 int vol; 02450 FRESULT res; 02451 const TCHAR *rp = path; 02452 02453 INFO("f_mount(%p,%s,%02X)", fs, path, opt); 02454 vol = get_ldnumber(&rp); 02455 if (vol < 0) return FR_INVALID_DRIVE; 02456 cfs = FatFs[vol]; /* Pointer to fs object */ 02457 INFO(" cfs(%p) = FatFs[%d]", cfs, vol); 02458 02459 if (cfs) { 02460 #if _FS_LOCK 02461 clear_lock(cfs); 02462 #endif 02463 #if _FS_REENTRANT /* Discard sync object of the current volume */ 02464 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR; 02465 #endif 02466 cfs->fs_type = 0; /* Clear old fs object */ 02467 } 02468 02469 if (fs) { 02470 fs->fs_type = 0; /* Clear new fs object */ 02471 #if _FS_REENTRANT /* Create sync object for the new volume */ 02472 if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR; 02473 #endif 02474 } 02475 INFO(" assign FatFs[%d] = %p", vol, fs); 02476 FatFs[vol] = fs; /* Register new fs object */ 02477 02478 if (!fs || opt != 1) return FR_OK; /* Do not mount now, it will be mounted later */ 02479 02480 res = find_volume(&fs, &path, 0); /* Force mounted the volume */ 02481 LEAVE_FF(fs, res); 02482 } 02483 02484 02485 02486 02487 /*-----------------------------------------------------------------------*/ 02488 /* Open or Create a File */ 02489 /*-----------------------------------------------------------------------*/ 02490 02491 FRESULT f_open ( 02492 FIL* fp, /* Pointer to the blank file object */ 02493 const TCHAR* path, /* Pointer to the file name */ 02494 BYTE mode /* Access mode and file open mode flags */ 02495 ) 02496 { 02497 FRESULT res; 02498 FATFS_DIR dj; 02499 BYTE *dir; 02500 DEFINE_NAMEBUF; 02501 #if !_FS_READONLY 02502 DWORD dw, cl; 02503 #endif 02504 02505 INFO("f_open(%p,%s,0x%02X)", fp, path, mode); 02506 if (!fp) return FR_INVALID_OBJECT; 02507 fp->fs = 0; /* Clear file object */ 02508 02509 /* Get logical drive number */ 02510 #if !_FS_READONLY 02511 mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW; 02512 res = find_volume(&dj.fs, &path, (BYTE)(mode & ~FA_READ)); 02513 #else 02514 mode &= FA_READ; 02515 res = find_volume(&dj.fs, &path, 0); 02516 #endif 02517 INFO(" res(%d) == FR_OK(%d)", res, FR_OK); 02518 if (res == FR_OK) { 02519 INIT_BUF(dj); 02520 res = follow_path(&dj, path); /* Follow the file path */ 02521 dir = dj.dir; 02522 #if !_FS_READONLY /* R/W configuration */ 02523 INFO(" res(%d) == FR_OK(%d)", res, FR_OK); 02524 if (res == FR_OK) { 02525 if (!dir) /* Default directory itself */ 02526 res = FR_INVALID_NAME; 02527 #if _FS_LOCK 02528 else 02529 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 02530 #endif 02531 } 02532 /* Create or Open a file */ 02533 INFO(" res(%d) == FR_OK(%d)", res, FR_OK); 02534 INFO(" mode(%02X) & const(%02X)", mode, (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)); 02535 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { 02536 if (res != FR_OK) { /* No file, create new */ 02537 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */ 02538 #if _FS_LOCK 02539 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; 02540 #else 02541 res = dir_register(&dj); 02542 #endif 02543 mode |= FA_CREATE_ALWAYS; /* File is created */ 02544 dir = dj.dir; /* New entry */ 02545 } 02546 else { /* Any object is already existing */ 02547 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or FATFS_DIR) */ 02548 res = FR_DENIED; 02549 } else { 02550 if (mode & FA_CREATE_NEW) /* Cannot create as new file */ 02551 res = FR_EXIST; 02552 } 02553 } 02554 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */ 02555 dw = GET_FATTIME(); 02556 ST_DWORD(dir + DIR_CrtTime, dw);/* Set created time */ 02557 ST_DWORD(dir + DIR_WrtTime, dw);/* Set modified time */ 02558 dir[DIR_Attr] = 0; /* Reset attribute */ 02559 ST_DWORD(dir + DIR_FileSize, 0);/* Reset file size */ 02560 cl = ld_clust(dj.fs, dir); /* Get cluster chain */ 02561 st_clust(dir, 0); /* Reset cluster */ 02562 dj.fs->wflag = 1; 02563 if (cl) { /* Remove the cluster chain if exist */ 02564 dw = dj.fs->winsect; 02565 res = remove_chain(dj.fs, cl); 02566 if (res == FR_OK) { 02567 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */ 02568 res = move_window(dj.fs, dw); 02569 } 02570 } 02571 } 02572 } 02573 else { /* Open an existing file */ 02574 if (res == FR_OK) { /* Following succeeded */ 02575 if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */ 02576 res = FR_NO_FILE; 02577 } else { 02578 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */ 02579 res = FR_DENIED; 02580 } 02581 } 02582 } 02583 if (res == FR_OK) { 02584 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */ 02585 mode |= FA__WRITTEN; 02586 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */ 02587 fp->dir_ptr = dir; 02588 #if _FS_LOCK 02589 fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 02590 if (!fp->lockid) res = FR_INT_ERR; 02591 #endif 02592 } 02593 02594 #else /* R/O configuration */ 02595 if (res == FR_OK) { /* Follow succeeded */ 02596 dir = dj.dir; 02597 if (!dir) { /* Current directory itself */ 02598 res = FR_INVALID_NAME; 02599 } else { 02600 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */ 02601 res = FR_NO_FILE; 02602 } 02603 } 02604 #endif 02605 FREE_BUF(); 02606 02607 if (res == FR_OK) { 02608 fp->flag = mode; /* File access mode */ 02609 fp->err = 0; /* Clear error flag */ 02610 fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */ 02611 fp->fsize = LD_DWORD(dir + DIR_FileSize); /* File size */ 02612 fp->fptr = 0; /* File pointer */ 02613 fp->dsect = 0; 02614 #if _USE_FASTSEEK 02615 fp->cltbl = 0; /* Normal seek mode */ 02616 #endif 02617 fp->fs = dj.fs; /* Validate file object */ 02618 fp->id = fp->fs->id; 02619 } 02620 } 02621 02622 LEAVE_FF(dj.fs, res); 02623 } 02624 02625 02626 02627 02628 /*-----------------------------------------------------------------------*/ 02629 /* Read File */ 02630 /*-----------------------------------------------------------------------*/ 02631 02632 FRESULT f_read ( 02633 FIL* fp, /* Pointer to the file object */ 02634 void* buff, /* Pointer to data buffer */ 02635 UINT btr, /* Number of bytes to read */ 02636 UINT* br /* Pointer to number of bytes read */ 02637 ) 02638 { 02639 FRESULT res; 02640 DWORD clst, sect, remain; 02641 UINT rcnt, cc; 02642 BYTE csect, *rbuff = (BYTE*)buff; 02643 02644 02645 *br = 0; /* Clear read byte counter */ 02646 02647 res = validate(fp); /* Check validity */ 02648 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02649 if (fp->err) /* Check error */ 02650 LEAVE_FF(fp->fs, (FRESULT)fp->err); 02651 if (!(fp->flag & FA_READ)) /* Check access mode */ 02652 LEAVE_FF(fp->fs, FR_DENIED); 02653 remain = fp->fsize - fp->fptr; 02654 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 02655 02656 for ( ; btr; /* Repeat until all data read */ 02657 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { 02658 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 02659 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 02660 if (!csect) { /* On the cluster boundary? */ 02661 if (fp->fptr == 0) { /* On the top of the file? */ 02662 clst = fp->sclust; /* Follow from the origin */ 02663 } else { /* Middle or end of the file */ 02664 #if _USE_FASTSEEK 02665 if (fp->cltbl) 02666 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 02667 else 02668 #endif 02669 clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */ 02670 } 02671 if (clst < 2) ABORT(fp->fs, FR_INT_ERR); 02672 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02673 fp->clust = clst; /* Update current cluster */ 02674 } 02675 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ 02676 if (!sect) ABORT(fp->fs, FR_INT_ERR); 02677 sect += csect; 02678 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */ 02679 if (cc) { /* Read maximum contiguous sectors directly */ 02680 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 02681 cc = fp->fs->csize - csect; 02682 if (disk_read(fp->fs->drv, rbuff, sect, cc) != RES_OK) 02683 ABORT(fp->fs, FR_DISK_ERR); 02684 #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ 02685 #if _FS_TINY 02686 if (fp->fs->wflag && fp->fs->winsect - sect < cc) 02687 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs)); 02688 #else 02689 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) 02690 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs)); 02691 #endif 02692 #endif 02693 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 02694 continue; 02695 } 02696 #if !_FS_TINY 02697 if (fp->dsect != sect) { /* Load data sector if not in cache */ 02698 #if !_FS_READONLY 02699 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 02700 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02701 ABORT(fp->fs, FR_DISK_ERR); 02702 fp->flag &= ~FA__DIRTY; 02703 } 02704 #endif 02705 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */ 02706 ABORT(fp->fs, FR_DISK_ERR); 02707 } 02708 #endif 02709 fp->dsect = sect; 02710 } 02711 rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */ 02712 if (rcnt > btr) rcnt = btr; 02713 #if _FS_TINY 02714 if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */ 02715 ABORT(fp->fs, FR_DISK_ERR); 02716 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 02717 #else 02718 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 02719 #endif 02720 } 02721 02722 LEAVE_FF(fp->fs, FR_OK); 02723 } 02724 02725 02726 02727 02728 #if !_FS_READONLY 02729 /*-----------------------------------------------------------------------*/ 02730 /* Write File */ 02731 /*-----------------------------------------------------------------------*/ 02732 02733 FRESULT f_write ( 02734 FIL* fp, /* Pointer to the file object */ 02735 const void *buff, /* Pointer to the data to be written */ 02736 UINT btw, /* Number of bytes to write */ 02737 UINT* bw /* Pointer to number of bytes written */ 02738 ) 02739 { 02740 FRESULT res; 02741 DWORD clst, sect; 02742 UINT wcnt, cc; 02743 const BYTE *wbuff = (const BYTE*)buff; 02744 BYTE csect; 02745 bool need_sync = false; 02746 02747 *bw = 0; /* Clear write byte counter */ 02748 02749 res = validate(fp); /* Check validity */ 02750 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02751 if (fp->err) /* Check error */ 02752 LEAVE_FF(fp->fs, (FRESULT)fp->err); 02753 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 02754 LEAVE_FF(fp->fs, FR_DENIED); 02755 if (fp->fptr + btw < fp->fptr) btw = 0; /* File size cannot reach 4GB */ 02756 02757 for ( ; btw; /* Repeat until all data written */ 02758 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) { 02759 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 02760 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 02761 if (!csect) { /* On the cluster boundary? */ 02762 if (fp->fptr == 0) { /* On the top of the file? */ 02763 clst = fp->sclust; /* Follow from the origin */ 02764 if (clst == 0) /* When no cluster is allocated, */ 02765 clst = create_chain(fp->fs, 0); /* Create a new cluster chain */ 02766 } else { /* Middle or end of the file */ 02767 #if _USE_FASTSEEK 02768 if (fp->cltbl) 02769 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 02770 else 02771 #endif 02772 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */ 02773 } 02774 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ 02775 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 02776 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02777 fp->clust = clst; /* Update current cluster */ 02778 if (fp->sclust == 0) fp->sclust = clst; /* Set start cluster if the first write */ 02779 02780 #if FLUSH_ON_NEW_CLUSTER 02781 // We do not need to flush for the first cluster 02782 if (fp->fptr != 0) { 02783 need_sync = true; 02784 } 02785 #endif 02786 } 02787 #if _FS_TINY 02788 if (fp->fs->winsect == fp->dsect && sync_window(fp->fs)) /* Write-back sector cache */ 02789 ABORT(fp->fs, FR_DISK_ERR); 02790 #else 02791 if (fp->flag & FA__DIRTY) { /* Write-back sector cache */ 02792 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02793 ABORT(fp->fs, FR_DISK_ERR); 02794 fp->flag &= ~FA__DIRTY; 02795 } 02796 #endif 02797 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ 02798 if (!sect) ABORT(fp->fs, FR_INT_ERR); 02799 sect += csect; 02800 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */ 02801 if (cc) { /* Write maximum contiguous sectors directly */ 02802 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 02803 cc = fp->fs->csize - csect; 02804 if (disk_write(fp->fs->drv, wbuff, sect, cc) != RES_OK) 02805 ABORT(fp->fs, FR_DISK_ERR); 02806 #if _FS_MINIMIZE <= 2 02807 #if _FS_TINY 02808 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 02809 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs)); 02810 fp->fs->wflag = 0; 02811 } 02812 #else 02813 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 02814 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs)); 02815 fp->flag &= ~FA__DIRTY; 02816 } 02817 #endif 02818 #endif 02819 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 02820 #if FLUSH_ON_NEW_SECTOR 02821 need_sync = true; 02822 #endif 02823 continue; 02824 } 02825 #if _FS_TINY 02826 if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */ 02827 if (sync_window(fp->fs)) ABORT(fp->fs, FR_DISK_ERR); 02828 fp->fs->winsect = sect; 02829 } 02830 #else 02831 if (fp->dsect != sect) { /* Fill sector cache with file data */ 02832 if (fp->fptr < fp->fsize && 02833 disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) 02834 ABORT(fp->fs, FR_DISK_ERR); 02835 } 02836 #endif 02837 fp->dsect = sect; 02838 } 02839 wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */ 02840 if (wcnt > btw) wcnt = btw; 02841 #if _FS_TINY 02842 if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */ 02843 ABORT(fp->fs, FR_DISK_ERR); 02844 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 02845 fp->fs->wflag = 1; 02846 #else 02847 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 02848 fp->flag |= FA__DIRTY; 02849 #endif 02850 } 02851 02852 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */ 02853 fp->flag |= FA__WRITTEN; /* Set file change flag */ 02854 02855 if (need_sync) { 02856 f_sync (fp); 02857 } 02858 02859 LEAVE_FF(fp->fs, FR_OK); 02860 } 02861 02862 02863 02864 02865 /*-----------------------------------------------------------------------*/ 02866 /* Synchronize the File */ 02867 /*-----------------------------------------------------------------------*/ 02868 02869 FRESULT f_sync ( 02870 FIL* fp /* Pointer to the file object */ 02871 ) 02872 { 02873 FRESULT res; 02874 DWORD tm; 02875 BYTE *dir; 02876 02877 02878 res = validate(fp); /* Check validity of the object */ 02879 if (res == FR_OK) { 02880 if (fp->flag & FA__WRITTEN) { /* Is there any change to the file? */ 02881 #if !_FS_TINY 02882 if (fp->flag & FA__DIRTY) { /* Write-back cached data if needed */ 02883 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02884 LEAVE_FF(fp->fs, FR_DISK_ERR); 02885 fp->flag &= ~FA__DIRTY; 02886 } 02887 #endif 02888 /* Update the directory entry */ 02889 res = move_window(fp->fs, fp->dir_sect); 02890 if (res == FR_OK) { 02891 dir = fp->dir_ptr; 02892 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ 02893 ST_DWORD(dir + DIR_FileSize, fp->fsize); /* Update file size */ 02894 st_clust(dir, fp->sclust); /* Update start cluster */ 02895 tm = GET_FATTIME(); /* Update modified time */ 02896 ST_DWORD(dir + DIR_WrtTime, tm); 02897 ST_WORD(dir + DIR_LstAccDate, 0); 02898 fp->flag &= ~FA__WRITTEN; 02899 fp->fs->wflag = 1; 02900 res = sync_fs(fp->fs); 02901 } 02902 } 02903 } 02904 02905 LEAVE_FF(fp->fs, res); 02906 } 02907 02908 #endif /* !_FS_READONLY */ 02909 02910 02911 02912 02913 /*-----------------------------------------------------------------------*/ 02914 /* Close File */ 02915 /*-----------------------------------------------------------------------*/ 02916 02917 FRESULT f_close ( 02918 FIL *fp /* Pointer to the file object to be closed */ 02919 ) 02920 { 02921 FRESULT res; 02922 02923 02924 #if !_FS_READONLY 02925 res = f_sync(fp); /* Flush cached data */ 02926 if (res == FR_OK) 02927 #endif 02928 { 02929 res = validate(fp); /* Lock volume */ 02930 if (res == FR_OK) { 02931 #if _FS_REENTRANT 02932 FATFS *fs = fp->fs; 02933 #endif 02934 #if _FS_LOCK 02935 res = dec_lock(fp->lockid); /* Decrement file open counter */ 02936 if (res == FR_OK) 02937 #endif 02938 fp->fs = 0; /* Invalidate file object */ 02939 #if _FS_REENTRANT 02940 unlock_fs(fs, FR_OK); /* Unlock volume */ 02941 #endif 02942 } 02943 } 02944 return res; 02945 } 02946 02947 02948 02949 02950 /*-----------------------------------------------------------------------*/ 02951 /* Change Current Directory or Current Drive, Get Current Directory */ 02952 /*-----------------------------------------------------------------------*/ 02953 02954 #if _FS_RPATH >= 1 02955 #if _VOLUMES >= 2 02956 FRESULT f_chdrive ( 02957 const TCHAR* path /* Drive number */ 02958 ) 02959 { 02960 int vol; 02961 02962 02963 vol = get_ldnumber(&path); 02964 if (vol < 0) return FR_INVALID_DRIVE; 02965 02966 CurrVol = (BYTE)vol; 02967 02968 return FR_OK; 02969 } 02970 #endif 02971 02972 02973 FRESULT f_chdir ( 02974 const TCHAR* path /* Pointer to the directory path */ 02975 ) 02976 { 02977 FRESULT res; 02978 FATFS_DIR dj; 02979 DEFINE_NAMEBUF; 02980 02981 02982 /* Get logical drive number */ 02983 res = find_volume(&dj.fs, &path, 0); 02984 if (res == FR_OK) { 02985 INIT_BUF(dj); 02986 res = follow_path(&dj, path); /* Follow the path */ 02987 FREE_BUF(); 02988 if (res == FR_OK) { /* Follow completed */ 02989 if (!dj.dir) { 02990 dj.fs->cdir = dj.sclust; /* Start directory itself */ 02991 } else { 02992 if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */ 02993 dj.fs->cdir = ld_clust(dj.fs, dj.dir); 02994 else 02995 res = FR_NO_PATH; /* Reached but a file */ 02996 } 02997 } 02998 if (res == FR_NO_FILE) res = FR_NO_PATH; 02999 } 03000 03001 LEAVE_FF(dj.fs, res); 03002 } 03003 03004 03005 #if _FS_RPATH >= 2 03006 FRESULT f_getcwd ( 03007 TCHAR* buff, /* Pointer to the directory path */ 03008 UINT len /* Size of path */ 03009 ) 03010 { 03011 FRESULT res; 03012 FATFS_DIR dj; 03013 UINT i, n; 03014 DWORD ccl; 03015 TCHAR *tp; 03016 FILINFO fno; 03017 DEFINE_NAMEBUF; 03018 03019 03020 *buff = 0; 03021 /* Get logical drive number */ 03022 res = find_volume(&dj.fs, (const TCHAR**)&buff, 0); /* Get current volume */ 03023 if (res == FR_OK) { 03024 INIT_BUF(dj); 03025 i = len; /* Bottom of buffer (directory stack base) */ 03026 dj.sclust = dj.fs->cdir; /* Start to follow upper directory from current directory */ 03027 while ((ccl = dj.sclust) != 0) { /* Repeat while current directory is a sub-directory */ 03028 res = dir_sdi(&dj, 1); /* Get parent directory */ 03029 if (res != FR_OK) break; 03030 res = dir_read(&dj, 0); 03031 if (res != FR_OK) break; 03032 dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent directory */ 03033 res = dir_sdi(&dj, 0); 03034 if (res != FR_OK) break; 03035 do { /* Find the entry links to the child directory */ 03036 res = dir_read(&dj, 0); 03037 if (res != FR_OK) break; 03038 if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */ 03039 res = dir_next(&dj, 0); 03040 } while (res == FR_OK); 03041 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ 03042 if (res != FR_OK) break; 03043 #if _USE_LFN 03044 fno.lfname = buff; 03045 fno.lfsize = i; 03046 #endif 03047 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */ 03048 tp = fno.fname; 03049 #if _USE_LFN 03050 if (*buff) tp = buff; 03051 #endif 03052 for (n = 0; tp[n]; n++) ; 03053 if (i < n + 3) { 03054 res = FR_NOT_ENOUGH_CORE; break; 03055 } 03056 while (n) buff[--i] = tp[--n]; 03057 buff[--i] = '/'; 03058 } 03059 tp = buff; 03060 if (res == FR_OK) { 03061 #if _VOLUMES >= 2 03062 *tp++ = '0' + CurrVol; /* Put drive number */ 03063 *tp++ = ':'; 03064 #endif 03065 if (i == len) { /* Root-directory */ 03066 *tp++ = '/'; 03067 } else { /* Sub-directroy */ 03068 do /* Add stacked path str */ 03069 *tp++ = buff[i++]; 03070 while (i < len); 03071 } 03072 } 03073 *tp = 0; 03074 FREE_BUF(); 03075 } 03076 03077 LEAVE_FF(dj.fs, res); 03078 } 03079 #endif /* _FS_RPATH >= 2 */ 03080 #endif /* _FS_RPATH >= 1 */ 03081 03082 03083 03084 #if _FS_MINIMIZE <= 2 03085 /*-----------------------------------------------------------------------*/ 03086 /* Seek File R/W Pointer */ 03087 /*-----------------------------------------------------------------------*/ 03088 03089 FRESULT f_lseek ( 03090 FIL* fp, /* Pointer to the file object */ 03091 DWORD ofs /* File pointer from top of file */ 03092 ) 03093 { 03094 FRESULT res; 03095 DWORD clst, bcs, nsect, ifptr; 03096 #if _USE_FASTSEEK 03097 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl; 03098 #endif 03099 03100 03101 res = validate(fp); /* Check validity of the object */ 03102 if (res != FR_OK) LEAVE_FF(fp->fs, res); 03103 if (fp->err) /* Check error */ 03104 LEAVE_FF(fp->fs, (FRESULT)fp->err); 03105 03106 #if _USE_FASTSEEK 03107 if (fp->cltbl) { /* Fast seek */ 03108 if (ofs == CREATE_LINKMAP) { /* Create CLMT */ 03109 tbl = fp->cltbl; 03110 tlen = *tbl++; ulen = 2; /* Given table size and required table size */ 03111 cl = fp->sclust; /* Top of the chain */ 03112 if (cl) { 03113 do { 03114 /* Get a fragment */ 03115 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */ 03116 do { 03117 pcl = cl; ncl++; 03118 cl = get_fat(fp->fs, cl); 03119 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR); 03120 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 03121 } while (cl == pcl + 1); 03122 if (ulen <= tlen) { /* Store the length and top of the fragment */ 03123 *tbl++ = ncl; *tbl++ = tcl; 03124 } 03125 } while (cl < fp->fs->n_fatent); /* Repeat until end of chain */ 03126 } 03127 *fp->cltbl = ulen; /* Number of items used */ 03128 if (ulen <= tlen) 03129 *tbl = 0; /* Terminate table */ 03130 else 03131 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */ 03132 03133 } else { /* Fast seek */ 03134 if (ofs > fp->fsize) /* Clip offset at the file size */ 03135 ofs = fp->fsize; 03136 fp->fptr = ofs; /* Set file pointer */ 03137 if (ofs) { 03138 fp->clust = clmt_clust(fp, ofs - 1); 03139 dsc = clust2sect(fp->fs, fp->clust); 03140 if (!dsc) ABORT(fp->fs, FR_INT_ERR); 03141 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1); 03142 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */ 03143 #if !_FS_TINY 03144 #if !_FS_READONLY 03145 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 03146 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 03147 ABORT(fp->fs, FR_DISK_ERR); 03148 fp->flag &= ~FA__DIRTY; 03149 } 03150 #endif 03151 if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */ 03152 ABORT(fp->fs, FR_DISK_ERR); 03153 #endif 03154 fp->dsect = dsc; 03155 } 03156 } 03157 } 03158 } else 03159 #endif 03160 03161 /* Normal Seek */ 03162 { 03163 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */ 03164 #if !_FS_READONLY 03165 && !(fp->flag & FA_WRITE) 03166 #endif 03167 ) ofs = fp->fsize; 03168 03169 ifptr = fp->fptr; 03170 fp->fptr = nsect = 0; 03171 if (ofs) { 03172 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */ 03173 if (ifptr > 0 && 03174 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ 03175 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ 03176 ofs -= fp->fptr; 03177 clst = fp->clust; 03178 } else { /* When seek to back cluster, */ 03179 clst = fp->sclust; /* start from the first cluster */ 03180 #if !_FS_READONLY 03181 if (clst == 0) { /* If no cluster chain, create a new chain */ 03182 clst = create_chain(fp->fs, 0); 03183 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 03184 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 03185 fp->sclust = clst; 03186 } 03187 #endif 03188 fp->clust = clst; 03189 } 03190 if (clst != 0) { 03191 while (ofs > bcs) { /* Cluster following loop */ 03192 #if !_FS_READONLY 03193 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ 03194 clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */ 03195 if (clst == 0) { /* When disk gets full, clip file size */ 03196 ofs = bcs; break; 03197 } 03198 } else 03199 #endif 03200 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */ 03201 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 03202 if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR); 03203 fp->clust = clst; 03204 fp->fptr += bcs; 03205 ofs -= bcs; 03206 } 03207 fp->fptr += ofs; 03208 if (ofs % SS(fp->fs)) { 03209 nsect = clust2sect(fp->fs, clst); /* Current sector */ 03210 if (!nsect) ABORT(fp->fs, FR_INT_ERR); 03211 nsect += ofs / SS(fp->fs); 03212 } 03213 } 03214 } 03215 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */ 03216 #if !_FS_TINY 03217 #if !_FS_READONLY 03218 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 03219 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 03220 ABORT(fp->fs, FR_DISK_ERR); 03221 fp->flag &= ~FA__DIRTY; 03222 } 03223 #endif 03224 if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */ 03225 ABORT(fp->fs, FR_DISK_ERR); 03226 #endif 03227 fp->dsect = nsect; 03228 } 03229 #if !_FS_READONLY 03230 if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */ 03231 fp->fsize = fp->fptr; 03232 fp->flag |= FA__WRITTEN; 03233 } 03234 #endif 03235 } 03236 03237 LEAVE_FF(fp->fs, res); 03238 } 03239 03240 03241 03242 #if _FS_MINIMIZE <= 1 03243 /*-----------------------------------------------------------------------*/ 03244 /* Create a Directory Object */ 03245 /*-----------------------------------------------------------------------*/ 03246 03247 FRESULT f_opendir ( 03248 FATFS_DIR* dp, /* Pointer to directory object to create */ 03249 const TCHAR* path /* Pointer to the directory path */ 03250 ) 03251 { 03252 FRESULT res; 03253 FATFS* fs; 03254 DEFINE_NAMEBUF; 03255 03256 03257 if (!dp) return FR_INVALID_OBJECT; 03258 03259 /* Get logical drive number */ 03260 res = find_volume(&fs, &path, 0); 03261 if (res == FR_OK) { 03262 dp->fs = fs; 03263 INIT_BUF(*dp); 03264 res = follow_path(dp, path); /* Follow the path to the directory */ 03265 FREE_BUF(); 03266 if (res == FR_OK) { /* Follow completed */ 03267 if (dp->dir) { /* It is not the origin directory itself */ 03268 if (dp->dir[DIR_Attr] & AM_DIR) /* The object is a sub directory */ 03269 dp->sclust = ld_clust(fs, dp->dir); 03270 else /* The object is a file */ 03271 res = FR_NO_PATH; 03272 } 03273 if (res == FR_OK) { 03274 dp->id = fs->id; 03275 res = dir_sdi(dp, 0); /* Rewind directory */ 03276 #if _FS_LOCK 03277 if (res == FR_OK) { 03278 if (dp->sclust) { 03279 dp->lockid = inc_lock(dp, 0); /* Lock the sub directory */ 03280 if (!dp->lockid) 03281 res = FR_TOO_MANY_OPEN_FILES; 03282 } else { 03283 dp->lockid = 0; /* Root directory need not to be locked */ 03284 } 03285 } 03286 #endif 03287 } 03288 } 03289 if (res == FR_NO_FILE) res = FR_NO_PATH; 03290 } 03291 if (res != FR_OK) dp->fs = 0; /* Invalidate the directory object if function faild */ 03292 03293 LEAVE_FF(fs, res); 03294 } 03295 03296 03297 03298 03299 /*-----------------------------------------------------------------------*/ 03300 /* Close Directory */ 03301 /*-----------------------------------------------------------------------*/ 03302 03303 FRESULT f_closedir ( 03304 FATFS_DIR *dp /* Pointer to the directory object to be closed */ 03305 ) 03306 { 03307 FRESULT res; 03308 03309 03310 res = validate(dp); 03311 if (res == FR_OK) { 03312 #if _FS_REENTRANT 03313 FATFS *fs = dp->fs; 03314 #endif 03315 #if _FS_LOCK 03316 if (dp->lockid) /* Decrement sub-directory open counter */ 03317 res = dec_lock(dp->lockid); 03318 if (res == FR_OK) 03319 #endif 03320 dp->fs = 0; /* Invalidate directory object */ 03321 #if _FS_REENTRANT 03322 unlock_fs(fs, FR_OK); /* Unlock volume */ 03323 #endif 03324 } 03325 return res; 03326 } 03327 03328 03329 03330 03331 /*-----------------------------------------------------------------------*/ 03332 /* Read Directory Entries in Sequence */ 03333 /*-----------------------------------------------------------------------*/ 03334 03335 FRESULT f_readdir ( 03336 FATFS_DIR* dp, /* Pointer to the open directory object */ 03337 FILINFO* fno /* Pointer to file information to return */ 03338 ) 03339 { 03340 FRESULT res; 03341 DEFINE_NAMEBUF; 03342 03343 03344 res = validate(dp); /* Check validity of the object */ 03345 if (res == FR_OK) { 03346 if (!fno) { 03347 res = dir_sdi(dp, 0); /* Rewind the directory object */ 03348 } else { 03349 INIT_BUF(*dp); 03350 res = dir_read(dp, 0); /* Read an item */ 03351 if (res == FR_NO_FILE) { /* Reached end of directory */ 03352 dp->sect = 0; 03353 res = FR_OK; 03354 } 03355 if (res == FR_OK) { /* A valid entry is found */ 03356 get_fileinfo(dp, fno); /* Get the object information */ 03357 res = dir_next(dp, 0); /* Increment index for next */ 03358 if (res == FR_NO_FILE) { 03359 dp->sect = 0; 03360 res = FR_OK; 03361 } 03362 } 03363 FREE_BUF(); 03364 } 03365 } 03366 03367 LEAVE_FF(dp->fs, res); 03368 } 03369 03370 03371 03372 #if _USE_FIND 03373 /*-----------------------------------------------------------------------*/ 03374 /* Find next file */ 03375 /*-----------------------------------------------------------------------*/ 03376 03377 FRESULT f_findnext ( 03378 FATFS_DIR* dp, /* Pointer to the open directory object */ 03379 FILINFO* fno /* Pointer to the file information structure */ 03380 ) 03381 { 03382 FRESULT res; 03383 03384 03385 for (;;) { 03386 res = f_readdir(dp, fno); /* Get a directory item */ 03387 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */ 03388 #if _USE_LFN 03389 if (fno->lfname && pattern_matching(dp->pat, fno->lfname, 0, 0)) break; /* Test for LFN if exist */ 03390 #endif 03391 if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for SFN */ 03392 } 03393 return res; 03394 03395 } 03396 03397 03398 03399 /*-----------------------------------------------------------------------*/ 03400 /* Find first file */ 03401 /*-----------------------------------------------------------------------*/ 03402 03403 FRESULT f_findfirst ( 03404 FATFS_DIR* dp, /* Pointer to the blank directory object */ 03405 FILINFO* fno, /* Pointer to the file information structure */ 03406 const TCHAR* path, /* Pointer to the directory to open */ 03407 const TCHAR* pattern /* Pointer to the matching pattern */ 03408 ) 03409 { 03410 FRESULT res; 03411 03412 03413 dp->pat = pattern; /* Save pointer to pattern string */ 03414 res = f_opendir(dp, path); /* Open the target directory */ 03415 if (res == FR_OK) 03416 res = f_findnext(dp, fno); /* Find the first item */ 03417 return res; 03418 } 03419 03420 #endif /* _USE_FIND */ 03421 03422 03423 03424 #if _FS_MINIMIZE == 0 03425 /*-----------------------------------------------------------------------*/ 03426 /* Get File Status */ 03427 /*-----------------------------------------------------------------------*/ 03428 03429 FRESULT f_stat ( 03430 const TCHAR* path, /* Pointer to the file path */ 03431 FILINFO* fno /* Pointer to file information to return */ 03432 ) 03433 { 03434 FRESULT res; 03435 FATFS_DIR dj; 03436 DEFINE_NAMEBUF; 03437 03438 03439 /* Get logical drive number */ 03440 res = find_volume(&dj.fs, &path, 0); 03441 if (res == FR_OK) { 03442 INIT_BUF(dj); 03443 res = follow_path(&dj, path); /* Follow the file path */ 03444 if (res == FR_OK) { /* Follow completed */ 03445 if (dj.dir) { /* Found an object */ 03446 if (fno) get_fileinfo(&dj, fno); 03447 } else { /* It is root directory */ 03448 res = FR_INVALID_NAME; 03449 } 03450 } 03451 FREE_BUF(); 03452 } 03453 03454 LEAVE_FF(dj.fs, res); 03455 } 03456 03457 03458 03459 #if !_FS_READONLY 03460 /*-----------------------------------------------------------------------*/ 03461 /* Get Number of Free Clusters */ 03462 /*-----------------------------------------------------------------------*/ 03463 03464 FRESULT f_getfree ( 03465 const TCHAR* path, /* Path name of the logical drive number */ 03466 DWORD* nclst, /* Pointer to a variable to return number of free clusters */ 03467 FATFS** fatfs /* Pointer to return pointer to corresponding file system object */ 03468 ) 03469 { 03470 FRESULT res; 03471 FATFS *fs; 03472 DWORD nfree, clst, sect, stat; 03473 UINT i; 03474 BYTE fat, *p; 03475 03476 03477 /* Get logical drive number */ 03478 res = find_volume(fatfs, &path, 0); 03479 fs = *fatfs; 03480 if (res == FR_OK) { 03481 /* If free_clust is valid, return it without full cluster scan */ 03482 if (fs->free_clust <= fs->n_fatent - 2) { 03483 *nclst = fs->free_clust; 03484 } else { 03485 /* Get number of free clusters */ 03486 fat = fs->fs_type; 03487 nfree = 0; 03488 if (fat == FS_FAT12) { /* Sector unalighed entries: Search FAT via regular routine. */ 03489 clst = 2; 03490 do { 03491 stat = get_fat(fs, clst); 03492 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 03493 if (stat == 1) { res = FR_INT_ERR; break; } 03494 if (stat == 0) nfree++; 03495 } while (++clst < fs->n_fatent); 03496 } else { /* Sector alighed entries: Accelerate the FAT search. */ 03497 clst = fs->n_fatent; sect = fs->fatbase; 03498 i = 0; p = 0; 03499 do { 03500 if (!i) { 03501 res = move_window(fs, sect++); 03502 if (res != FR_OK) break; 03503 p = fs->win; 03504 i = SS(fs); 03505 } 03506 if (fat == FS_FAT16) { 03507 if (LD_WORD(p) == 0) nfree++; 03508 p += 2; i -= 2; 03509 } else { 03510 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) nfree++; 03511 p += 4; i -= 4; 03512 } 03513 } while (--clst); 03514 } 03515 fs->free_clust = nfree; /* free_clust is valid */ 03516 fs->fsi_flag |= 1; /* FSInfo is to be updated */ 03517 *nclst = nfree; /* Return the free clusters */ 03518 } 03519 } 03520 LEAVE_FF(fs, res); 03521 } 03522 03523 03524 03525 03526 /*-----------------------------------------------------------------------*/ 03527 /* Truncate File */ 03528 /*-----------------------------------------------------------------------*/ 03529 03530 FRESULT f_truncate ( 03531 FIL* fp /* Pointer to the file object */ 03532 ) 03533 { 03534 FRESULT res; 03535 DWORD ncl; 03536 03537 03538 res = validate(fp); /* Check validity of the object */ 03539 if (res == FR_OK) { 03540 if (fp->err) { /* Check error */ 03541 res = (FRESULT)fp->err; 03542 } else { 03543 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 03544 res = FR_DENIED; 03545 } 03546 } 03547 if (res == FR_OK) { 03548 if (fp->fsize > fp->fptr) { 03549 fp->fsize = fp->fptr; /* Set file size to current R/W point */ 03550 fp->flag |= FA__WRITTEN; 03551 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ 03552 res = remove_chain(fp->fs, fp->sclust); 03553 fp->sclust = 0; 03554 } else { /* When truncate a part of the file, remove remaining clusters */ 03555 ncl = get_fat(fp->fs, fp->clust); 03556 res = FR_OK; 03557 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; 03558 if (ncl == 1) res = FR_INT_ERR; 03559 if (res == FR_OK && ncl < fp->fs->n_fatent) { 03560 res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF); 03561 if (res == FR_OK) res = remove_chain(fp->fs, ncl); 03562 } 03563 } 03564 #if !_FS_TINY 03565 if (res == FR_OK && (fp->flag & FA__DIRTY)) { 03566 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 03567 res = FR_DISK_ERR; 03568 else 03569 fp->flag &= ~FA__DIRTY; 03570 } 03571 #endif 03572 } 03573 if (res != FR_OK) fp->err = (FRESULT)res; 03574 } 03575 03576 LEAVE_FF(fp->fs, res); 03577 } 03578 03579 03580 03581 03582 /*-----------------------------------------------------------------------*/ 03583 /* Delete a File or Directory */ 03584 /*-----------------------------------------------------------------------*/ 03585 03586 FRESULT f_unlink ( 03587 const TCHAR* path /* Pointer to the file or directory path */ 03588 ) 03589 { 03590 FRESULT res; 03591 FATFS_DIR dj, sdj; 03592 BYTE *dir; 03593 DWORD dclst = 0; 03594 DEFINE_NAMEBUF; 03595 03596 INFO("f_unlink(%s)", path); 03597 /* Get logical drive number */ 03598 res = find_volume(&dj.fs, &path, 1); 03599 if (res == FR_OK) { 03600 INIT_BUF(dj); 03601 res = follow_path(&dj, path); /* Follow the file path */ 03602 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) 03603 res = FR_INVALID_NAME; /* Cannot remove dot entry */ 03604 #if _FS_LOCK 03605 if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open object */ 03606 #endif 03607 if (res == FR_OK) { /* The object is accessible */ 03608 dir = dj.dir; 03609 if (!dir) { 03610 res = FR_INVALID_NAME; /* Cannot remove the origin directory */ 03611 } else { 03612 if (dir[DIR_Attr] & AM_RDO) 03613 res = FR_DENIED; /* Cannot remove R/O object */ 03614 } 03615 if (res == FR_OK) { 03616 dclst = ld_clust(dj.fs, dir); 03617 if (dclst && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-directory ? */ 03618 #if _FS_RPATH 03619 if (dclst == dj.fs->cdir) { /* Is it the current directory? */ 03620 res = FR_DENIED; 03621 } else 03622 #endif 03623 { 03624 mem_cpy(&sdj, &dj, sizeof (FATFS_DIR)); /* Open the sub-directory */ 03625 sdj.sclust = dclst; 03626 res = dir_sdi(&sdj, 2); 03627 if (res == FR_OK) { 03628 res = dir_read(&sdj, 0); /* Read an item (excluding dot entries) */ 03629 if (res == FR_OK) res = FR_DENIED; /* Not empty? (cannot remove) */ 03630 if (res == FR_NO_FILE) res = FR_OK; /* Empty? (can remove) */ 03631 } 03632 } 03633 } 03634 } 03635 if (res == FR_OK) { 03636 res = dir_remove(&dj); /* Remove the directory entry */ 03637 if (res == FR_OK && dclst) /* Remove the cluster chain if exist */ 03638 res = remove_chain(dj.fs, dclst); 03639 if (res == FR_OK) res = sync_fs(dj.fs); 03640 } 03641 } 03642 FREE_BUF(); 03643 } 03644 03645 LEAVE_FF(dj.fs, res); 03646 } 03647 03648 03649 03650 03651 /*-----------------------------------------------------------------------*/ 03652 /* Create a Directory */ 03653 /*-----------------------------------------------------------------------*/ 03654 03655 FRESULT f_mkdir ( 03656 const TCHAR* path /* Pointer to the directory path */ 03657 ) 03658 { 03659 FRESULT res; 03660 FATFS_DIR dj; 03661 BYTE *dir, n; 03662 DWORD dsc, dcl, pcl, tm = GET_FATTIME(); 03663 DEFINE_NAMEBUF; 03664 03665 03666 /* Get logical drive number */ 03667 res = find_volume(&dj.fs, &path, 1); 03668 if (res == FR_OK) { 03669 INIT_BUF(dj); 03670 res = follow_path(&dj, path); /* Follow the file path */ 03671 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */ 03672 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) 03673 res = FR_INVALID_NAME; 03674 if (res == FR_NO_FILE) { /* Can create a new directory */ 03675 dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */ 03676 res = FR_OK; 03677 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */ 03678 if (dcl == 1) res = FR_INT_ERR; 03679 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; 03680 if (res == FR_OK) /* Flush FAT */ 03681 res = sync_window(dj.fs); 03682 if (res == FR_OK) { /* Initialize the new directory table */ 03683 dsc = clust2sect(dj.fs, dcl); 03684 dir = dj.fs->win; 03685 mem_set(dir, 0, SS(dj.fs)); 03686 mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */ 03687 dir[DIR_Name] = '.'; 03688 dir[DIR_Attr] = AM_DIR; 03689 ST_DWORD(dir + DIR_WrtTime, tm); 03690 st_clust(dir, dcl); 03691 mem_cpy(dir + SZ_DIRE, dir, SZ_DIRE); /* Create ".." entry */ 03692 dir[SZ_DIRE + 1] = '.'; pcl = dj.sclust; 03693 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase) 03694 pcl = 0; 03695 st_clust(dir + SZ_DIRE, pcl); 03696 for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */ 03697 dj.fs->winsect = dsc++; 03698 dj.fs->wflag = 1; 03699 res = sync_window(dj.fs); 03700 if (res != FR_OK) break; 03701 mem_set(dir, 0, SS(dj.fs)); 03702 } 03703 } 03704 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */ 03705 if (res != FR_OK) { 03706 remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */ 03707 } else { 03708 dir = dj.dir; 03709 dir[DIR_Attr] = AM_DIR; /* Attribute */ 03710 ST_DWORD(dir + DIR_WrtTime, tm); /* Created time */ 03711 st_clust(dir, dcl); /* Table start cluster */ 03712 dj.fs->wflag = 1; 03713 res = sync_fs(dj.fs); 03714 } 03715 } 03716 FREE_BUF(); 03717 } 03718 03719 LEAVE_FF(dj.fs, res); 03720 } 03721 03722 03723 03724 03725 /*-----------------------------------------------------------------------*/ 03726 /* Change Attribute */ 03727 /*-----------------------------------------------------------------------*/ 03728 03729 FRESULT f_chmod ( 03730 const TCHAR* path, /* Pointer to the file path */ 03731 BYTE attr, /* Attribute bits */ 03732 BYTE mask /* Attribute mask to change */ 03733 ) 03734 { 03735 FRESULT res; 03736 FATFS_DIR dj; 03737 BYTE *dir; 03738 DEFINE_NAMEBUF; 03739 03740 03741 res = find_volume(&dj.fs, &path, 1); /* Get logical drive number */ 03742 if (res == FR_OK) { 03743 INIT_BUF(dj); 03744 res = follow_path(&dj, path); /* Follow the file path */ 03745 FREE_BUF(); 03746 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) 03747 res = FR_INVALID_NAME; 03748 if (res == FR_OK) { 03749 dir = dj.dir; 03750 if (!dir) { /* Is it a root directory? */ 03751 res = FR_INVALID_NAME; 03752 } else { /* File or sub directory */ 03753 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ 03754 dir[DIR_Attr] = (attr & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 03755 dj.fs->wflag = 1; 03756 res = sync_fs(dj.fs); 03757 } 03758 } 03759 } 03760 03761 LEAVE_FF(dj.fs, res); 03762 } 03763 03764 03765 03766 03767 /*-----------------------------------------------------------------------*/ 03768 /* Rename File/Directory */ 03769 /*-----------------------------------------------------------------------*/ 03770 03771 FRESULT f_rename ( 03772 const TCHAR* path_old, /* Pointer to the object to be renamed */ 03773 const TCHAR* path_new /* Pointer to the new name */ 03774 ) 03775 { 03776 FRESULT res; 03777 FATFS_DIR djo, djn; 03778 BYTE buf[21], *dir; 03779 DWORD dw; 03780 DEFINE_NAMEBUF; 03781 03782 03783 /* Get logical drive number of the source object */ 03784 res = find_volume(&djo.fs, &path_old, 1); 03785 if (res == FR_OK) { 03786 djn.fs = djo.fs; 03787 INIT_BUF(djo); 03788 res = follow_path(&djo, path_old); /* Check old object */ 03789 if (_FS_RPATH && res == FR_OK && (djo.fn[NSFLAG] & NS_DOT)) 03790 res = FR_INVALID_NAME; 03791 #if _FS_LOCK 03792 if (res == FR_OK) res = chk_lock(&djo, 2); 03793 #endif 03794 if (res == FR_OK) { /* Old object is found */ 03795 if (!djo.dir) { /* Is root dir? */ 03796 res = FR_NO_FILE; 03797 } else { 03798 mem_cpy(buf, djo.dir + DIR_Attr, 21); /* Save information about object except name */ 03799 mem_cpy(&djn, &djo, sizeof (FATFS_DIR)); /* Duplicate the directory object */ 03800 if (get_ldnumber(&path_new) >= 0) /* Snip drive number off and ignore it */ 03801 res = follow_path(&djn, path_new); /* and make sure if new object name is not conflicting */ 03802 else 03803 res = FR_INVALID_DRIVE; 03804 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */ 03805 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */ 03806 res = dir_register(&djn); /* Register the new entry */ 03807 if (res == FR_OK) { 03808 /* Start of critical section where any interruption can cause a cross-link */ 03809 dir = djn.dir; /* Copy information about object except name */ 03810 mem_cpy(dir + 13, buf + 2, 19); 03811 dir[DIR_Attr] = buf[0] | AM_ARC; 03812 djo.fs->wflag = 1; 03813 if ((dir[DIR_Attr] & AM_DIR) && djo.sclust != djn.sclust) { /* Update .. entry in the sub-directory if needed */ 03814 dw = clust2sect(djo.fs, ld_clust(djo.fs, dir)); 03815 if (!dw) { 03816 res = FR_INT_ERR; 03817 } else { 03818 res = move_window(djo.fs, dw); 03819 dir = djo.fs->win + SZ_DIRE * 1; /* Ptr to .. entry */ 03820 if (res == FR_OK && dir[1] == '.') { 03821 st_clust(dir, djn.sclust); 03822 djo.fs->wflag = 1; 03823 } 03824 } 03825 } 03826 if (res == FR_OK) { 03827 res = dir_remove(&djo); /* Remove old entry */ 03828 if (res == FR_OK) 03829 res = sync_fs(djo.fs); 03830 } 03831 /* End of critical section */ 03832 } 03833 } 03834 } 03835 } 03836 FREE_BUF(); 03837 } 03838 03839 LEAVE_FF(djo.fs, res); 03840 } 03841 03842 03843 03844 03845 /*-----------------------------------------------------------------------*/ 03846 /* Change Timestamp */ 03847 /*-----------------------------------------------------------------------*/ 03848 03849 FRESULT f_utime ( 03850 const TCHAR* path, /* Pointer to the file/directory name */ 03851 const FILINFO* fno /* Pointer to the time stamp to be set */ 03852 ) 03853 { 03854 FRESULT res; 03855 FATFS_DIR dj; 03856 BYTE *dir; 03857 DEFINE_NAMEBUF; 03858 03859 03860 /* Get logical drive number */ 03861 res = find_volume(&dj.fs, &path, 1); 03862 if (res == FR_OK) { 03863 INIT_BUF(dj); 03864 res = follow_path(&dj, path); /* Follow the file path */ 03865 FREE_BUF(); 03866 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) 03867 res = FR_INVALID_NAME; 03868 if (res == FR_OK) { 03869 dir = dj.dir; 03870 if (!dir) { /* Root directory */ 03871 res = FR_INVALID_NAME; 03872 } else { /* File or sub-directory */ 03873 ST_WORD(dir + DIR_WrtTime, fno->ftime); 03874 ST_WORD(dir + DIR_WrtDate, fno->fdate); 03875 dj.fs->wflag = 1; 03876 res = sync_fs(dj.fs); 03877 } 03878 } 03879 } 03880 03881 LEAVE_FF(dj.fs, res); 03882 } 03883 03884 #endif /* !_FS_READONLY */ 03885 #endif /* _FS_MINIMIZE == 0 */ 03886 #endif /* _FS_MINIMIZE <= 1 */ 03887 #endif /* _FS_MINIMIZE <= 2 */ 03888 03889 03890 03891 03892 #if _USE_LABEL 03893 /*-----------------------------------------------------------------------*/ 03894 /* Get volume label */ 03895 /*-----------------------------------------------------------------------*/ 03896 03897 FRESULT f_getlabel ( 03898 const TCHAR* path, /* Path name of the logical drive number */ 03899 TCHAR* label, /* Pointer to a buffer to return the volume label */ 03900 DWORD* vsn /* Pointer to a variable to return the volume serial number */ 03901 ) 03902 { 03903 FRESULT res; 03904 FATFS_DIR dj; 03905 UINT i, j; 03906 #if _USE_LFN && _LFN_UNICODE 03907 WCHAR w; 03908 #endif 03909 03910 03911 /* Get logical drive number */ 03912 res = find_volume(&dj.fs, &path, 0); 03913 03914 /* Get volume label */ 03915 if (res == FR_OK && label) { 03916 dj.sclust = 0; /* Open root directory */ 03917 res = dir_sdi(&dj, 0); 03918 if (res == FR_OK) { 03919 res = dir_read(&dj, 1); /* Get an entry with AM_VOL */ 03920 if (res == FR_OK) { /* A volume label is exist */ 03921 #if _USE_LFN && _LFN_UNICODE 03922 i = j = 0; 03923 do { 03924 w = (i < 11) ? dj.dir[i++] : ' '; 03925 if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i])) 03926 w = w << 8 | dj.dir[i++]; 03927 label[j++] = ff_convert(w, 1); /* OEM -> Unicode */ 03928 } while (j < 11); 03929 #else 03930 mem_cpy(label, dj.dir, 11); 03931 #endif 03932 j = 11; 03933 do { 03934 label[j] = 0; 03935 if (!j) break; 03936 } while (label[--j] == ' '); 03937 } 03938 if (res == FR_NO_FILE) { /* No label, return nul string */ 03939 label[0] = 0; 03940 res = FR_OK; 03941 } 03942 } 03943 } 03944 03945 /* Get volume serial number */ 03946 if (res == FR_OK && vsn) { 03947 res = move_window(dj.fs, dj.fs->volbase); 03948 if (res == FR_OK) { 03949 i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID; 03950 *vsn = LD_DWORD(&dj.fs->win[i]); 03951 } 03952 } 03953 03954 LEAVE_FF(dj.fs, res); 03955 } 03956 03957 03958 03959 #if !_FS_READONLY 03960 /*-----------------------------------------------------------------------*/ 03961 /* Set volume label */ 03962 /*-----------------------------------------------------------------------*/ 03963 03964 FRESULT f_setlabel ( 03965 const TCHAR* label /* Pointer to the volume label to set */ 03966 ) 03967 { 03968 FRESULT res; 03969 FATFS_DIR dj; 03970 BYTE vn[11]; 03971 UINT i, j, sl; 03972 WCHAR w; 03973 DWORD tm; 03974 03975 03976 /* Get logical drive number */ 03977 res = find_volume(&dj.fs, &label, 1); 03978 if (res) LEAVE_FF(dj.fs, res); 03979 03980 /* Create a volume label in directory form */ 03981 vn[0] = 0; 03982 for (sl = 0; label[sl]; sl++) ; /* Get name length */ 03983 for ( ; sl && label[sl - 1] == ' '; sl--) ; /* Remove trailing spaces */ 03984 if (sl) { /* Create volume label in directory form */ 03985 i = j = 0; 03986 do { 03987 #if _USE_LFN && _LFN_UNICODE 03988 w = ff_convert(ff_wtoupper(label[i++]), 0); 03989 #else 03990 w = (BYTE)label[i++]; 03991 if (IsDBCS1(w)) 03992 w = (j < 10 && i < sl && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0; 03993 #if _USE_LFN 03994 w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0); 03995 #else 03996 if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */ 03997 #ifdef _EXCVT 03998 if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */ 03999 #else 04000 if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */ 04001 #endif 04002 #endif 04003 #endif 04004 if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid characters for volume label */ 04005 LEAVE_FF(dj.fs, FR_INVALID_NAME); 04006 if (w >= 0x100) vn[j++] = (BYTE)(w >> 8); 04007 vn[j++] = (BYTE)w; 04008 } while (i < sl); 04009 while (j < 11) vn[j++] = ' '; /* Fill remaining name field */ 04010 if (vn[0] == DDEM) LEAVE_FF(dj.fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */ 04011 } 04012 04013 /* Set volume label */ 04014 dj.sclust = 0; /* Open root directory */ 04015 res = dir_sdi(&dj, 0); 04016 if (res == FR_OK) { 04017 res = dir_read(&dj, 1); /* Get an entry with AM_VOL */ 04018 if (res == FR_OK) { /* A volume label is found */ 04019 if (vn[0]) { 04020 mem_cpy(dj.dir, vn, 11); /* Change the volume label name */ 04021 tm = GET_FATTIME(); 04022 ST_DWORD(dj.dir + DIR_WrtTime, tm); 04023 } else { 04024 dj.dir[0] = DDEM; /* Remove the volume label */ 04025 } 04026 dj.fs->wflag = 1; 04027 res = sync_fs(dj.fs); 04028 } else { /* No volume label is found or error */ 04029 if (res == FR_NO_FILE) { 04030 res = FR_OK; 04031 if (vn[0]) { /* Create volume label as new */ 04032 res = dir_alloc(&dj, 1); /* Allocate an entry for volume label */ 04033 if (res == FR_OK) { 04034 mem_set(dj.dir, 0, SZ_DIRE); /* Set volume label */ 04035 mem_cpy(dj.dir, vn, 11); 04036 dj.dir[DIR_Attr] = AM_VOL; 04037 tm = GET_FATTIME(); 04038 ST_DWORD(dj.dir + DIR_WrtTime, tm); 04039 dj.fs->wflag = 1; 04040 res = sync_fs(dj.fs); 04041 } 04042 } 04043 } 04044 } 04045 } 04046 04047 LEAVE_FF(dj.fs, res); 04048 } 04049 04050 #endif /* !_FS_READONLY */ 04051 #endif /* _USE_LABEL */ 04052 04053 04054 04055 /*-----------------------------------------------------------------------*/ 04056 /* Forward data to the stream directly (available on only tiny cfg) */ 04057 /*-----------------------------------------------------------------------*/ 04058 #if _USE_FORWARD && _FS_TINY 04059 04060 FRESULT f_forward ( 04061 FIL* fp, /* Pointer to the file object */ 04062 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ 04063 UINT btf, /* Number of bytes to forward */ 04064 UINT* bf /* Pointer to number of bytes forwarded */ 04065 ) 04066 { 04067 FRESULT res; 04068 DWORD remain, clst, sect; 04069 UINT rcnt; 04070 BYTE csect; 04071 04072 04073 *bf = 0; /* Clear transfer byte counter */ 04074 04075 res = validate(fp); /* Check validity of the object */ 04076 if (res != FR_OK) LEAVE_FF(fp->fs, res); 04077 if (fp->err) /* Check error */ 04078 LEAVE_FF(fp->fs, (FRESULT)fp->err); 04079 if (!(fp->flag & FA_READ)) /* Check access mode */ 04080 LEAVE_FF(fp->fs, FR_DENIED); 04081 04082 remain = fp->fsize - fp->fptr; 04083 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */ 04084 04085 for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */ 04086 fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) { 04087 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 04088 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 04089 if (!csect) { /* On the cluster boundary? */ 04090 clst = (fp->fptr == 0) ? /* On the top of the file? */ 04091 fp->sclust : get_fat(fp->fs, fp->clust); 04092 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR); 04093 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 04094 fp->clust = clst; /* Update current cluster */ 04095 } 04096 } 04097 sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */ 04098 if (!sect) ABORT(fp->fs, FR_INT_ERR); 04099 sect += csect; 04100 if (move_window(fp->fs, sect) != FR_OK) /* Move sector window */ 04101 ABORT(fp->fs, FR_DISK_ERR); 04102 fp->dsect = sect; 04103 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */ 04104 if (rcnt > btf) rcnt = btf; 04105 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt); 04106 if (!rcnt) ABORT(fp->fs, FR_INT_ERR); 04107 } 04108 04109 LEAVE_FF(fp->fs, FR_OK); 04110 } 04111 #endif /* _USE_FORWARD */ 04112 04113 04114 04115 #if _USE_MKFS && !_FS_READONLY 04116 /*-----------------------------------------------------------------------*/ 04117 /* Create file system on the logical drive */ 04118 /*-----------------------------------------------------------------------*/ 04119 #define N_ROOTDIR 512 /* Number of root directory entries for FAT12/16 */ 04120 #define N_FATS 1 /* Number of FATs (1 or 2) */ 04121 04122 04123 FRESULT f_mkfs ( 04124 const TCHAR* path, /* Logical drive number */ 04125 BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */ 04126 UINT au /* Size of allocation unit in unit of byte or sector */ 04127 ) 04128 { 04129 static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0}; 04130 static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512}; 04131 int vol; 04132 BYTE fmt, md, sys, *tbl, pdrv, part; 04133 DWORD n_clst, vs, n, wsect; 04134 UINT i; 04135 DWORD b_vol, b_fat, b_dir, b_data; /* LBA */ 04136 DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */ 04137 FATFS *fs; 04138 DSTATUS stat; 04139 #if _USE_TRIM 04140 DWORD eb[2]; 04141 #endif 04142 04143 04144 /* Check mounted drive and clear work area */ 04145 if (sfd > 1) return FR_INVALID_PARAMETER; 04146 vol = get_ldnumber(&path); 04147 if (vol < 0) return FR_INVALID_DRIVE; 04148 fs = FatFs[vol]; 04149 if (!fs) return FR_NOT_ENABLED; 04150 fs->fs_type = 0; 04151 pdrv = LD2PD(vol); /* Physical drive */ 04152 part = LD2PT(vol); /* Partition (0:auto detect, 1-4:get from partition table)*/ 04153 04154 /* Get disk statics */ 04155 stat = disk_initialize(pdrv); 04156 if (stat & STA_NOINIT) return FR_NOT_READY; 04157 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 04158 #if _MAX_SS != _MIN_SS /* Get disk sector size */ 04159 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS || SS(fs) < _MIN_SS) 04160 return FR_DISK_ERR; 04161 #endif 04162 if (_MULTI_PARTITION && part) { 04163 /* Get partition information from partition table in the MBR */ 04164 if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR; 04165 if (LD_WORD(fs->win + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED; 04166 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE]; 04167 if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */ 04168 b_vol = LD_DWORD(tbl + 8); /* Volume start sector */ 04169 n_vol = LD_DWORD(tbl + 12); /* Volume size */ 04170 } else { 04171 /* Create a partition in this function */ 04172 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128) 04173 return FR_DISK_ERR; 04174 b_vol = (sfd) ? 0 : 63; /* Volume start sector */ 04175 n_vol -= b_vol; /* Volume size */ 04176 } 04177 04178 if (au & (au - 1)) au = 0; 04179 if (!au) { /* AU auto selection */ 04180 vs = n_vol / (2000 / (SS(fs) / 512)); 04181 for (i = 0; vs < vst[i]; i++) ; 04182 au = cst[i]; 04183 } 04184 if (au >= _MIN_SS) au /= SS(fs); /* Number of sectors per cluster */ 04185 if (!au) au = 1; 04186 if (au > 128) au = 128; 04187 04188 /* Pre-compute number of clusters and FAT sub-type */ 04189 n_clst = n_vol / au; 04190 fmt = FS_FAT12; 04191 if (n_clst >= MIN_FAT16) fmt = FS_FAT16; 04192 if (n_clst >= MIN_FAT32) fmt = FS_FAT32; 04193 04194 /* Determine offset and size of FAT structure */ 04195 if (fmt == FS_FAT32) { 04196 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs); 04197 n_rsv = 32; 04198 n_dir = 0; 04199 } else { 04200 n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4; 04201 n_fat = (n_fat + SS(fs) - 1) / SS(fs); 04202 n_rsv = 1; 04203 n_dir = (DWORD)N_ROOTDIR * SZ_DIRE / SS(fs); 04204 } 04205 b_fat = b_vol + n_rsv; /* FAT area start sector */ 04206 b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */ 04207 b_data = b_dir + n_dir; /* Data area start sector */ 04208 if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */ 04209 04210 /* Align data start sector to erase block boundary (for flash memory media) */ 04211 if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1; 04212 n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */ 04213 n = (n - b_data) / N_FATS; 04214 if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */ 04215 n_rsv += n; 04216 b_fat += n; 04217 } else { /* FAT12/16: Expand FAT size */ 04218 n_fat += n; 04219 } 04220 04221 /* Determine number of clusters and final check of validity of the FAT sub-type */ 04222 n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au; 04223 if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16) 04224 || (fmt == FS_FAT32 && n_clst < MIN_FAT32)) 04225 return FR_MKFS_ABORTED; 04226 04227 /* Determine system ID in the partition table */ 04228 if (fmt == FS_FAT32) { 04229 sys = 0x0C; /* FAT32X */ 04230 } else { 04231 if (fmt == FS_FAT12 && n_vol < 0x10000) { 04232 sys = 0x01; /* FAT12(<65536) */ 04233 } else { 04234 sys = (n_vol < 0x10000) ? 0x04 : 0x06; /* FAT16(<65536) : FAT12/16(>=65536) */ 04235 } 04236 } 04237 04238 if (_MULTI_PARTITION && part) { 04239 /* Update system ID in the partition table */ 04240 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE]; 04241 tbl[4] = sys; 04242 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to teh MBR */ 04243 return FR_DISK_ERR; 04244 md = 0xF8; 04245 } else { 04246 if (sfd) { /* No partition table (SFD) */ 04247 md = 0xF0; 04248 } else { /* Create partition table (FDISK) */ 04249 mem_set(fs->win, 0, SS(fs)); 04250 tbl = fs->win + MBR_Table; /* Create partition table for single partition in the drive */ 04251 tbl[1] = 1; /* Partition start head */ 04252 tbl[2] = 1; /* Partition start sector */ 04253 tbl[3] = 0; /* Partition start cylinder */ 04254 tbl[4] = sys; /* System type */ 04255 tbl[5] = 254; /* Partition end head */ 04256 n = (b_vol + n_vol) / 63 / 255; 04257 tbl[6] = (BYTE)(n >> 2 | 63); /* Partition end sector */ 04258 tbl[7] = (BYTE)n; /* End cylinder */ 04259 ST_DWORD(tbl + 8, 63); /* Partition start in LBA */ 04260 ST_DWORD(tbl + 12, n_vol); /* Partition size in LBA */ 04261 ST_WORD(fs->win + BS_55AA, 0xAA55); /* MBR signature */ 04262 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR */ 04263 return FR_DISK_ERR; 04264 md = 0xF8; 04265 } 04266 } 04267 04268 /* Create BPB in the VBR */ 04269 tbl = fs->win; /* Clear sector */ 04270 mem_set(tbl, 0, SS(fs)); 04271 mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */ 04272 i = SS(fs); /* Sector size */ 04273 ST_WORD(tbl + BPB_BytsPerSec, i); 04274 tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */ 04275 ST_WORD(tbl + BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */ 04276 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */ 04277 i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of root directory entries */ 04278 ST_WORD(tbl + BPB_RootEntCnt, i); 04279 if (n_vol < 0x10000) { /* Number of total sectors */ 04280 ST_WORD(tbl + BPB_TotSec16, n_vol); 04281 } else { 04282 ST_DWORD(tbl + BPB_TotSec32, n_vol); 04283 } 04284 tbl[BPB_Media] = md; /* Media descriptor */ 04285 ST_WORD(tbl + BPB_SecPerTrk, 63); /* Number of sectors per track */ 04286 ST_WORD(tbl + BPB_NumHeads, 255); /* Number of heads */ 04287 ST_DWORD(tbl + BPB_HiddSec, b_vol); /* Hidden sectors */ 04288 n = GET_FATTIME(); /* Use current time as VSN */ 04289 if (fmt == FS_FAT32) { 04290 ST_DWORD(tbl + BS_VolID32, n); /* VSN */ 04291 ST_DWORD(tbl + BPB_FATSz32, n_fat); /* Number of sectors per FAT */ 04292 ST_DWORD(tbl + BPB_RootClus, 2); /* Root directory start cluster (2) */ 04293 ST_WORD(tbl + BPB_FSInfo, 1); /* FSINFO record offset (VBR + 1) */ 04294 ST_WORD(tbl + BPB_BkBootSec, 6); /* Backup boot record offset (VBR + 6) */ 04295 tbl[BS_DrvNum32] = 0x80; /* Drive number */ 04296 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */ 04297 mem_cpy(tbl + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ 04298 } else { 04299 ST_DWORD(tbl + BS_VolID, n); /* VSN */ 04300 ST_WORD(tbl + BPB_FATSz16, n_fat); /* Number of sectors per FAT */ 04301 tbl[BS_DrvNum] = 0x80; /* Drive number */ 04302 tbl[BS_BootSig] = 0x29; /* Extended boot signature */ 04303 mem_cpy(tbl + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ 04304 } 04305 ST_WORD(tbl + BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */ 04306 if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */ 04307 return FR_DISK_ERR; 04308 if (fmt == FS_FAT32) /* Write it to the backup VBR if needed (VBR + 6) */ 04309 disk_write(pdrv, tbl, b_vol + 6, 1); 04310 04311 /* Initialize FAT area */ 04312 wsect = b_fat; 04313 for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */ 04314 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */ 04315 n = md; /* Media descriptor byte */ 04316 if (fmt != FS_FAT32) { 04317 n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00; 04318 ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT12/16) */ 04319 } else { 04320 n |= 0xFFFFFF00; 04321 ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT32) */ 04322 ST_DWORD(tbl + 4, 0xFFFFFFFF); 04323 ST_DWORD(tbl + 8, 0x0FFFFFFF); /* Reserve cluster #2 for root directory */ 04324 } 04325 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) 04326 return FR_DISK_ERR; 04327 mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */ 04328 for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */ 04329 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) 04330 return FR_DISK_ERR; 04331 } 04332 } 04333 04334 /* Initialize root directory */ 04335 i = (fmt == FS_FAT32) ? au : (UINT)n_dir; 04336 do { 04337 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) 04338 return FR_DISK_ERR; 04339 } while (--i); 04340 04341 #if _USE_TRIM /* Erase data area if needed */ 04342 { 04343 eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1; 04344 disk_ioctl(pdrv, CTRL_TRIM, eb); 04345 } 04346 #endif 04347 04348 /* Create FSINFO if needed */ 04349 if (fmt == FS_FAT32) { 04350 ST_DWORD(tbl + FSI_LeadSig, 0x41615252); 04351 ST_DWORD(tbl + FSI_StrucSig, 0x61417272); 04352 ST_DWORD(tbl + FSI_Free_Count, n_clst - 1); /* Number of free clusters */ 04353 ST_DWORD(tbl + FSI_Nxt_Free, 2); /* Last allocated cluster# */ 04354 ST_WORD(tbl + BS_55AA, 0xAA55); 04355 disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR + 1) */ 04356 disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR + 7) */ 04357 } 04358 04359 return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR; 04360 } 04361 04362 04363 04364 #if _MULTI_PARTITION 04365 /*-----------------------------------------------------------------------*/ 04366 /* Create partition table on the physical drive */ 04367 /*-----------------------------------------------------------------------*/ 04368 04369 FRESULT f_fdisk ( 04370 BYTE pdrv, /* Physical drive number */ 04371 const DWORD szt[], /* Pointer to the size table for each partitions */ 04372 void* work /* Pointer to the working buffer */ 04373 ) 04374 { 04375 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl; 04376 BYTE s_hd, e_hd, *p, *buf = (BYTE*)work; 04377 DSTATUS stat; 04378 DWORD sz_disk, sz_part, s_part; 04379 04380 04381 stat = disk_initialize(pdrv); 04382 if (stat & STA_NOINIT) return FR_NOT_READY; 04383 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 04384 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR; 04385 04386 /* Determine CHS in the table regardless of the drive geometry */ 04387 for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ; 04388 if (n == 256) n--; 04389 e_hd = n - 1; 04390 sz_cyl = 63 * n; 04391 tot_cyl = sz_disk / sz_cyl; 04392 04393 /* Create partition table */ 04394 mem_set(buf, 0, _MAX_SS); 04395 p = buf + MBR_Table; b_cyl = 0; 04396 for (i = 0; i < 4; i++, p += SZ_PTE) { 04397 p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl; 04398 if (!p_cyl) continue; 04399 s_part = (DWORD)sz_cyl * b_cyl; 04400 sz_part = (DWORD)sz_cyl * p_cyl; 04401 if (i == 0) { /* Exclude first track of cylinder 0 */ 04402 s_hd = 1; 04403 s_part += 63; sz_part -= 63; 04404 } else { 04405 s_hd = 0; 04406 } 04407 e_cyl = b_cyl + p_cyl - 1; 04408 if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER; 04409 04410 /* Set partition table */ 04411 p[1] = s_hd; /* Start head */ 04412 p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */ 04413 p[3] = (BYTE)b_cyl; /* Start cylinder */ 04414 p[4] = 0x06; /* System type (temporary setting) */ 04415 p[5] = e_hd; /* End head */ 04416 p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */ 04417 p[7] = (BYTE)e_cyl; /* End cylinder */ 04418 ST_DWORD(p + 8, s_part); /* Start sector in LBA */ 04419 ST_DWORD(p + 12, sz_part); /* Partition size */ 04420 04421 /* Next partition */ 04422 b_cyl += p_cyl; 04423 } 04424 ST_WORD(p, 0xAA55); 04425 04426 /* Write it to the MBR */ 04427 return (disk_write(pdrv, buf, 0, 1) != RES_OK || disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK; 04428 } 04429 04430 04431 #endif /* _MULTI_PARTITION */ 04432 #endif /* _USE_MKFS && !_FS_READONLY */ 04433 04434 04435 04436 04437 #if _USE_STRFUNC 04438 /*-----------------------------------------------------------------------*/ 04439 /* Get a string from the file */ 04440 /*-----------------------------------------------------------------------*/ 04441 04442 TCHAR* f_gets ( 04443 TCHAR* buff, /* Pointer to the string buffer to read */ 04444 int len, /* Size of string buffer (characters) */ 04445 FIL* fp /* Pointer to the file object */ 04446 ) 04447 { 04448 int n = 0; 04449 TCHAR c, *p = buff; 04450 BYTE s[2]; 04451 UINT rc; 04452 04453 04454 while (n < len - 1) { /* Read characters until buffer gets filled */ 04455 #if _USE_LFN && _LFN_UNICODE 04456 #if _STRF_ENCODE == 3 /* Read a character in UTF-8 */ 04457 f_read(fp, s, 1, &rc); 04458 if (rc != 1) break; 04459 c = s[0]; 04460 if (c >= 0x80) { 04461 if (c < 0xC0) continue; /* Skip stray trailer */ 04462 if (c < 0xE0) { /* Two-byte sequence */ 04463 f_read(fp, s, 1, &rc); 04464 if (rc != 1) break; 04465 c = (c & 0x1F) << 6 | (s[0] & 0x3F); 04466 if (c < 0x80) c = '?'; 04467 } else { 04468 if (c < 0xF0) { /* Three-byte sequence */ 04469 f_read(fp, s, 2, &rc); 04470 if (rc != 2) break; 04471 c = c << 12 | (s[0] & 0x3F) << 6 | (s[1] & 0x3F); 04472 if (c < 0x800) c = '?'; 04473 } else { /* Reject four-byte sequence */ 04474 c = '?'; 04475 } 04476 } 04477 } 04478 #elif _STRF_ENCODE == 2 /* Read a character in UTF-16BE */ 04479 f_read(fp, s, 2, &rc); 04480 if (rc != 2) break; 04481 c = s[1] + (s[0] << 8); 04482 #elif _STRF_ENCODE == 1 /* Read a character in UTF-16LE */ 04483 f_read(fp, s, 2, &rc); 04484 if (rc != 2) break; 04485 c = s[0] + (s[1] << 8); 04486 #else /* Read a character in ANSI/OEM */ 04487 f_read(fp, s, 1, &rc); 04488 if (rc != 1) break; 04489 c = s[0]; 04490 if (IsDBCS1(c)) { 04491 f_read(fp, s, 1, &rc); 04492 if (rc != 1) break; 04493 c = (c << 8) + s[0]; 04494 } 04495 c = ff_convert(c, 1); /* OEM -> Unicode */ 04496 if (!c) c = '?'; 04497 #endif 04498 #else /* Read a character without conversion */ 04499 f_read(fp, s, 1, &rc); 04500 if (rc != 1) break; 04501 c = s[0]; 04502 #endif 04503 if (_USE_STRFUNC == 2 && c == '\r') continue; /* Strip '\r' */ 04504 *p++ = c; 04505 n++; 04506 if (c == '\n') break; /* Break on EOL */ 04507 } 04508 *p = 0; 04509 return n ? buff : 0; /* When no data read (eof or error), return with error. */ 04510 } 04511 04512 04513 04514 04515 #if !_FS_READONLY 04516 #include <stdarg.h> 04517 /*-----------------------------------------------------------------------*/ 04518 /* Put a character to the file */ 04519 /*-----------------------------------------------------------------------*/ 04520 04521 typedef struct { 04522 FIL* fp; 04523 int idx, nchr; 04524 BYTE buf[64]; 04525 } putbuff; 04526 04527 04528 static 04529 void putc_bfd ( 04530 putbuff* pb, 04531 TCHAR c 04532 ) 04533 { 04534 UINT bw; 04535 int i; 04536 04537 04538 if (_USE_STRFUNC == 2 && c == '\n') /* LF -> CRLF conversion */ 04539 putc_bfd(pb, '\r'); 04540 04541 i = pb->idx; /* Buffer write index (-1:error) */ 04542 if (i < 0) return; 04543 04544 #if _USE_LFN && _LFN_UNICODE 04545 #if _STRF_ENCODE == 3 /* Write a character in UTF-8 */ 04546 if (c < 0x80) { /* 7-bit */ 04547 pb->buf[i++] = (BYTE)c; 04548 } else { 04549 if (c < 0x800) { /* 11-bit */ 04550 pb->buf[i++] = (BYTE)(0xC0 | c >> 6); 04551 } else { /* 16-bit */ 04552 pb->buf[i++] = (BYTE)(0xE0 | c >> 12); 04553 pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F)); 04554 } 04555 pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F)); 04556 } 04557 #elif _STRF_ENCODE == 2 /* Write a character in UTF-16BE */ 04558 pb->buf[i++] = (BYTE)(c >> 8); 04559 pb->buf[i++] = (BYTE)c; 04560 #elif _STRF_ENCODE == 1 /* Write a character in UTF-16LE */ 04561 pb->buf[i++] = (BYTE)c; 04562 pb->buf[i++] = (BYTE)(c >> 8); 04563 #else /* Write a character in ANSI/OEM */ 04564 c = ff_convert(c, 0); /* Unicode -> OEM */ 04565 if (!c) c = '?'; 04566 if (c >= 0x100) 04567 pb->buf[i++] = (BYTE)(c >> 8); 04568 pb->buf[i++] = (BYTE)c; 04569 #endif 04570 #else /* Write a character without conversion */ 04571 pb->buf[i++] = (BYTE)c; 04572 #endif 04573 04574 if (i >= (int)(sizeof pb->buf) - 3) { /* Write buffered characters to the file */ 04575 f_write(pb->fp, pb->buf, (UINT)i, &bw); 04576 i = (bw == (UINT)i) ? 0 : -1; 04577 } 04578 pb->idx = i; 04579 pb->nchr++; 04580 } 04581 04582 04583 04584 int f_putc ( 04585 TCHAR c, /* A character to be output */ 04586 FIL* fp /* Pointer to the file object */ 04587 ) 04588 { 04589 putbuff pb; 04590 UINT nw; 04591 04592 04593 pb.fp = fp; /* Initialize output buffer */ 04594 pb.nchr = pb.idx = 0; 04595 04596 putc_bfd(&pb, c); /* Put a character */ 04597 04598 if ( pb.idx >= 0 /* Flush buffered characters to the file */ 04599 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK 04600 && (UINT)pb.idx == nw) return pb.nchr; 04601 return EOF; 04602 } 04603 04604 04605 04606 04607 /*-----------------------------------------------------------------------*/ 04608 /* Put a string to the file */ 04609 /*-----------------------------------------------------------------------*/ 04610 04611 int f_puts ( 04612 const TCHAR* str, /* Pointer to the string to be output */ 04613 FIL* fp /* Pointer to the file object */ 04614 ) 04615 { 04616 putbuff pb; 04617 UINT nw; 04618 04619 04620 pb.fp = fp; /* Initialize output buffer */ 04621 pb.nchr = pb.idx = 0; 04622 04623 while (*str) /* Put the string */ 04624 putc_bfd(&pb, *str++); 04625 04626 if ( pb.idx >= 0 /* Flush buffered characters to the file */ 04627 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK 04628 && (UINT)pb.idx == nw) return pb.nchr; 04629 return EOF; 04630 } 04631 04632 04633 04634 04635 /*-----------------------------------------------------------------------*/ 04636 /* Put a formatted string to the file */ 04637 /*-----------------------------------------------------------------------*/ 04638 04639 int f_printf ( 04640 FIL* fp, /* Pointer to the file object */ 04641 const TCHAR* fmt, /* Pointer to the format string */ 04642 ... /* Optional arguments... */ 04643 ) 04644 { 04645 va_list arp; 04646 BYTE f, r; 04647 UINT nw, i, j, w; 04648 DWORD v; 04649 TCHAR c, d, s[16], *p; 04650 putbuff pb; 04651 04652 04653 pb.fp = fp; /* Initialize output buffer */ 04654 pb.nchr = pb.idx = 0; 04655 04656 va_start(arp, fmt); 04657 04658 for (;;) { 04659 c = *fmt++; 04660 if (c == 0) break; /* End of string */ 04661 if (c != '%') { /* Non escape character */ 04662 putc_bfd(&pb, c); 04663 continue; 04664 } 04665 w = f = 0; 04666 c = *fmt++; 04667 if (c == '0') { /* Flag: '0' padding */ 04668 f = 1; c = *fmt++; 04669 } else { 04670 if (c == '-') { /* Flag: left justified */ 04671 f = 2; c = *fmt++; 04672 } 04673 } 04674 while (IsDigit(c)) { /* Precision */ 04675 w = w * 10 + c - '0'; 04676 c = *fmt++; 04677 } 04678 if (c == 'l' || c == 'L') { /* Prefix: Size is long int */ 04679 f |= 4; c = *fmt++; 04680 } 04681 if (!c) break; 04682 d = c; 04683 if (IsLower(d)) d -= 0x20; 04684 switch (d) { /* Type is... */ 04685 case 'S' : /* String */ 04686 p = va_arg(arp, TCHAR*); 04687 for (j = 0; p[j]; j++) ; 04688 if (!(f & 2)) { 04689 while (j++ < w) putc_bfd(&pb, ' '); 04690 } 04691 while (*p) putc_bfd(&pb, *p++); 04692 while (j++ < w) putc_bfd(&pb, ' '); 04693 continue; 04694 case 'C' : /* Character */ 04695 putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue; 04696 case 'B' : /* Binary */ 04697 r = 2; break; 04698 case 'O' : /* Octal */ 04699 r = 8; break; 04700 case 'D' : /* Signed decimal */ 04701 case 'U' : /* Unsigned decimal */ 04702 r = 10; break; 04703 case 'X' : /* Hexdecimal */ 04704 r = 16; break; 04705 default: /* Unknown type (pass-through) */ 04706 putc_bfd(&pb, c); continue; 04707 } 04708 04709 /* Get an argument and put it in numeral */ 04710 v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int)); 04711 if (d == 'D' && (v & 0x80000000)) { 04712 v = 0 - v; 04713 f |= 8; 04714 } 04715 i = 0; 04716 do { 04717 d = (TCHAR)(v % r); v /= r; 04718 if (d > 9) d += (c == 'x') ? 0x27 : 0x07; 04719 s[i++] = d + '0'; 04720 } while (v && i < sizeof s / sizeof s[0]); 04721 if (f & 8) s[i++] = '-'; 04722 j = i; d = (f & 1) ? '0' : ' '; 04723 while (!(f & 2) && j++ < w) putc_bfd(&pb, d); 04724 do putc_bfd(&pb, s[--i]); while (i); 04725 while (j++ < w) putc_bfd(&pb, d); 04726 } 04727 04728 va_end(arp); 04729 04730 if ( pb.idx >= 0 /* Flush buffered characters to the file */ 04731 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK 04732 && (UINT)pb.idx == nw) return pb.nchr; 04733 return EOF; 04734 } 04735 04736 #endif /* !_FS_READONLY */ 04737 #endif /* _USE_STRFUNC */
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