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Dependencies: ChaNFSSD mbed BMP085 SHT2x
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ff.c
00001 /*----------------------------------------------------------------------------/ 00002 / FatFs - FAT file system module R0.08b (C)ChaN, 2011 00003 /-----------------------------------------------------------------------------/ 00004 / FatFs module is a generic FAT file system module for small embedded systems. 00005 / This is a free software that opened for education, research and commercial 00006 / developments under license policy of following terms. 00007 / 00008 / Copyright (C) 2011, ChaN, all right reserved. 00009 / 00010 / * The FatFs module is a free software and there is NO WARRANTY. 00011 / * No restriction on use. You can use, modify and redistribute it for 00012 / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY. 00013 / * Redistributions of source code must retain the above copyright notice. 00014 / 00015 /-----------------------------------------------------------------------------/ 00016 / Feb 26,'06 R0.00 Prototype. 00017 / 00018 / Apr 29,'06 R0.01 First stable version. 00019 / 00020 / Jun 01,'06 R0.02 Added FAT12 support. 00021 / Removed unbuffered mode. 00022 / Fixed a problem on small (<32M) partition. 00023 / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM). 00024 / 00025 / Sep 22,'06 R0.03 Added f_rename(). 00026 / Changed option _FS_MINIMUM to _FS_MINIMIZE. 00027 / Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast. 00028 / Fixed f_mkdir() creates incorrect directory on FAT32. 00029 / 00030 / Feb 04,'07 R0.04 Supported multiple drive system. 00031 / Changed some interfaces for multiple drive system. 00032 / Changed f_mountdrv() to f_mount(). 00033 / Added f_mkfs(). 00034 / Apr 01,'07 R0.04a Supported multiple partitions on a physical drive. 00035 / Added a capability of extending file size to f_lseek(). 00036 / Added minimization level 3. 00037 / Fixed an endian sensitive code in f_mkfs(). 00038 / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG. 00039 / Added FSInfo support. 00040 / Fixed DBCS name can result FR_INVALID_NAME. 00041 / Fixed short seek (<= csize) collapses the file object. 00042 / 00043 / Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs(). 00044 / Fixed f_mkfs() on FAT32 creates incorrect FSInfo. 00045 / Fixed f_mkdir() on FAT32 creates incorrect directory. 00046 / Feb 03,'08 R0.05a Added f_truncate() and f_utime(). 00047 / Fixed off by one error at FAT sub-type determination. 00048 / Fixed btr in f_read() can be mistruncated. 00049 / Fixed cached sector is not flushed when create and close without write. 00050 / 00051 / Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets(). 00052 / Improved performance of f_lseek() on moving to the same or following cluster. 00053 / 00054 / Apr 01,'09 R0.07 Merged Tiny-FatFs as a configuration option. (_FS_TINY) 00055 / Added long file name feature. 00056 / Added multiple code page feature. 00057 / Added re-entrancy for multitask operation. 00058 / Added auto cluster size selection to f_mkfs(). 00059 / Added rewind option to f_readdir(). 00060 / Changed result code of critical errors. 00061 / Renamed string functions to avoid name collision. 00062 / Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg. 00063 / Added multiple sector size feature. 00064 / Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error. 00065 / Fixed wrong cache control in f_lseek(). 00066 / Added relative path feature. 00067 / Added f_chdir() and f_chdrive(). 00068 / Added proper case conversion to extended char. 00069 / Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h. 00070 / Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH. 00071 / Fixed name matching error on the 13 char boundary. 00072 / Added a configuration option, _LFN_UNICODE. 00073 / Changed f_readdir() to return the SFN with always upper case on non-LFN cfg. 00074 / 00075 / May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN = 3) 00076 / Added file lock feature. (_FS_SHARE) 00077 / Added fast seek feature. (_USE_FASTSEEK) 00078 / Changed some types on the API, XCHAR->TCHAR. 00079 / Changed fname member in the FILINFO structure on Unicode cfg. 00080 / String functions support UTF-8 encoding files on Unicode cfg. 00081 / Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2) 00082 / Added sector erase feature. (_USE_ERASE) 00083 / Moved file lock semaphore table from fs object to the bss. 00084 / Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'. 00085 / Fixed f_mkfs() creates wrong FAT32 volume. 00086 / Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write(). 00087 / f_lseek() reports required table size on creating CLMP. 00088 / Extended format syntax of f_printf function. 00089 / Ignores duplicated directory separators in given path names. 00090 /---------------------------------------------------------------------------*/ 00091 00092 #include "ff.h" /* FatFs configurations and declarations */ 00093 #include "diskio.h" /* Declarations of low level disk I/O functions */ 00094 #include "mbed.h" 00095 00096 00097 /*-------------------------------------------------------------------------- 00098 00099 Module Private Definitions 00100 00101 ---------------------------------------------------------------------------*/ 00102 00103 #if _FATFS != 8237 00104 #error Wrong include file (ff.h). 00105 #endif 00106 00107 00108 /* Definitions on sector size */ 00109 #if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096 00110 #error Wrong sector size. 00111 #endif 00112 #if _MAX_SS != 512 00113 #define SS(fs) ((fs)->ssize) /* Multiple sector size */ 00114 #else 00115 #define SS(fs) 512U /* Fixed sector size */ 00116 #endif 00117 00118 00119 /* Reentrancy related */ 00120 #if _FS_REENTRANT 00121 #if _USE_LFN == 1 00122 #error Static LFN work area must not be used in re-entrant configuration. 00123 #endif 00124 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; } 00125 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } 00126 #else 00127 #define ENTER_FF(fs) 00128 #define LEAVE_FF(fs, res) return res 00129 #endif 00130 00131 #define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); } 00132 00133 00134 /* File shareing feature */ 00135 #if _FS_SHARE 00136 #if _FS_READONLY 00137 #error _FS_SHARE must be 0 on read-only cfg. 00138 #endif 00139 typedef struct { 00140 FATFS *fs; /* File ID 1, volume (NULL:blank entry) */ 00141 DWORD clu; /* File ID 2, directory */ 00142 WORD idx; /* File ID 3, directory index */ 00143 WORD ctr; /* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */ 00144 } FILESEM; 00145 #endif 00146 00147 00148 /* Misc definitions */ 00149 #define LD_CLUST(dir) (((DWORD)LD_WORD(dir+DIR_FstClusHI)<<16) | LD_WORD(dir+DIR_FstClusLO)) 00150 #define ST_CLUST(dir,cl) {ST_WORD(dir+DIR_FstClusLO, cl); ST_WORD(dir+DIR_FstClusHI, (DWORD)cl>>16);} 00151 00152 00153 /* DBCS code ranges and SBCS extend char conversion table */ 00154 00155 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */ 00156 #define _DF1S 0x81 /* DBC 1st byte range 1 start */ 00157 #define _DF1E 0x9F /* DBC 1st byte range 1 end */ 00158 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */ 00159 #define _DF2E 0xFC /* DBC 1st byte range 2 end */ 00160 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */ 00161 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */ 00162 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */ 00163 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */ 00164 00165 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */ 00166 #define _DF1S 0x81 00167 #define _DF1E 0xFE 00168 #define _DS1S 0x40 00169 #define _DS1E 0x7E 00170 #define _DS2S 0x80 00171 #define _DS2E 0xFE 00172 00173 #elif _CODE_PAGE == 949 /* Korean */ 00174 #define _DF1S 0x81 00175 #define _DF1E 0xFE 00176 #define _DS1S 0x41 00177 #define _DS1E 0x5A 00178 #define _DS2S 0x61 00179 #define _DS2E 0x7A 00180 #define _DS3S 0x81 00181 #define _DS3E 0xFE 00182 00183 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */ 00184 #define _DF1S 0x81 00185 #define _DF1E 0xFE 00186 #define _DS1S 0x40 00187 #define _DS1E 0x7E 00188 #define _DS2S 0xA1 00189 #define _DS2E 0xFE 00190 00191 #elif _CODE_PAGE == 437 /* U.S. (OEM) */ 00192 #define _DF1S 0 00193 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F,0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00194 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00195 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00196 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00197 00198 #elif _CODE_PAGE == 720 /* Arabic (OEM) */ 00199 #define _DF1S 0 00200 #define _EXCVT {0x80,0x81,0x45,0x41,0x84,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x49,0x49,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00201 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00202 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00203 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00204 00205 #elif _CODE_PAGE == 737 /* Greek (OEM) */ 00206 #define _DF1S 0 00207 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \ 00208 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00209 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00210 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00211 00212 #elif _CODE_PAGE == 775 /* Baltic (OEM) */ 00213 #define _DF1S 0 00214 #define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 00215 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00216 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00217 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00218 00219 #elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */ 00220 #define _DF1S 0 00221 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 00222 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00223 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00224 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00225 00226 #elif _CODE_PAGE == 852 /* Latin 2 (OEM) */ 00227 #define _DF1S 0 00228 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F,0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0x9F, \ 00229 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \ 00230 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00231 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF} 00232 00233 #elif _CODE_PAGE == 855 /* Cyrillic (OEM) */ 00234 #define _DF1S 0 00235 #define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F,0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \ 00236 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \ 00237 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \ 00238 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF} 00239 00240 #elif _CODE_PAGE == 857 /* Turkish (OEM) */ 00241 #define _DF1S 0 00242 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x98,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \ 00243 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00244 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00245 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00246 00247 #elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */ 00248 #define _DF1S 0 00249 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 00250 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00251 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00252 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00253 00254 #elif _CODE_PAGE == 862 /* Hebrew (OEM) */ 00255 #define _DF1S 0 00256 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00257 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00258 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00259 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00260 00261 #elif _CODE_PAGE == 866 /* Russian (OEM) */ 00262 #define _DF1S 0 00263 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00264 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00265 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00266 0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00267 00268 #elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */ 00269 #define _DF1S 0 00270 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00271 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00272 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00273 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00274 00275 #elif _CODE_PAGE == 1250 /* Central Europe (Windows) */ 00276 #define _DF1S 0 00277 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \ 00278 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xA3,0xB4,0xB5,0xB6,0xB7,0xB8,0xA5,0xAA,0xBB,0xBC,0xBD,0xBC,0xAF, \ 00279 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00280 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF} 00281 00282 #elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */ 00283 #define _DF1S 0 00284 #define _EXCVT {0x80,0x81,0x82,0x82,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x80,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \ 00285 0xA0,0xA2,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB2,0xA5,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xA3,0xBD,0xBD,0xAF, \ 00286 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00287 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF} 00288 00289 #elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */ 00290 #define _DF1S 0 00291 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0xAd,0x9B,0x8C,0x9D,0xAE,0x9F, \ 00292 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00293 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00294 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F} 00295 00296 #elif _CODE_PAGE == 1253 /* Greek (Windows) */ 00297 #define _DF1S 0 00298 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00299 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00300 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xA2,0xB8,0xB9,0xBA, \ 00301 0xE0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xFB,0xBC,0xFD,0xBF,0xFF} 00302 00303 #elif _CODE_PAGE == 1254 /* Turkish (Windows) */ 00304 #define _DF1S 0 00305 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x9D,0x9E,0x9F, \ 00306 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00307 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00308 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F} 00309 00310 #elif _CODE_PAGE == 1255 /* Hebrew (Windows) */ 00311 #define _DF1S 0 00312 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00313 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00314 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00315 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00316 00317 #elif _CODE_PAGE == 1256 /* Arabic (Windows) */ 00318 #define _DF1S 0 00319 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x8C,0x9D,0x9E,0x9F, \ 00320 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00321 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00322 0x41,0xE1,0x41,0xE3,0xE4,0xE5,0xE6,0x43,0x45,0x45,0x45,0x45,0xEC,0xED,0x49,0x49,0xF0,0xF1,0xF2,0xF3,0x4F,0xF5,0xF6,0xF7,0xF8,0x55,0xFA,0x55,0x55,0xFD,0xFE,0xFF} 00323 00324 #elif _CODE_PAGE == 1257 /* Baltic (Windows) */ 00325 #define _DF1S 0 00326 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00327 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xBC,0xBD,0xBE,0xAF, \ 00328 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00329 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF} 00330 00331 #elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */ 00332 #define _DF1S 0 00333 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0xAC,0x9D,0x9E,0x9F, \ 00334 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00335 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00336 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xEC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xFE,0x9F} 00337 00338 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */ 00339 #if _USE_LFN 00340 #error Cannot use LFN feature without valid code page. 00341 #endif 00342 #define _DF1S 0 00343 00344 #else 00345 #error Unknown code page 00346 00347 #endif 00348 00349 00350 /* Character code support macros */ 00351 #define IsUpper(c) (((c)>='A')&&((c)<='Z')) 00352 #define IsLower(c) (((c)>='a')&&((c)<='z')) 00353 #define IsDigit(c) (((c)>='0')&&((c)<='9')) 00354 00355 #if _DF1S /* Code page is DBCS */ 00356 00357 #ifdef _DF2S /* Two 1st byte areas */ 00358 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) 00359 #else /* One 1st byte area */ 00360 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) 00361 #endif 00362 00363 #ifdef _DS3S /* Three 2nd byte areas */ 00364 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) 00365 #else /* Two 2nd byte areas */ 00366 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) 00367 #endif 00368 00369 #else /* Code page is SBCS */ 00370 00371 #define IsDBCS1(c) 0 00372 #define IsDBCS2(c) 0 00373 00374 #endif /* _DF1S */ 00375 00376 00377 /* Name status flags */ 00378 #define NS 11 /* Index of name status byte in fn[] */ 00379 #define NS_LOSS 0x01 /* Out of 8.3 format */ 00380 #define NS_LFN 0x02 /* Force to create LFN entry */ 00381 #define NS_LAST 0x04 /* Last segment */ 00382 #define NS_BODY 0x08 /* Lower case flag (body) */ 00383 #define NS_EXT 0x10 /* Lower case flag (ext) */ 00384 #define NS_DOT 0x20 /* Dot entry */ 00385 00386 00387 /* FAT sub-type boundaries */ 00388 /* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */ 00389 #define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */ 00390 #define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */ 00391 00392 00393 /* FatFs refers the members in the FAT structures as byte array instead of 00394 / structure member because the structure is not binary compatible between 00395 / different platforms */ 00396 00397 #define BS_jmpBoot 0 /* Jump instruction (3) */ 00398 #define BS_OEMName 3 /* OEM name (8) */ 00399 #define BPB_BytsPerSec 11 /* Sector size [byte] (2) */ 00400 #define BPB_SecPerClus 13 /* Cluster size [sector] (1) */ 00401 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */ 00402 #define BPB_NumFATs 16 /* Number of FAT copies (1) */ 00403 #define BPB_RootEntCnt 17 /* Number of root dir entries for FAT12/16 (2) */ 00404 #define BPB_TotSec16 19 /* Volume size [sector] (2) */ 00405 #define BPB_Media 21 /* Media descriptor (1) */ 00406 #define BPB_FATSz16 22 /* FAT size [sector] (2) */ 00407 #define BPB_SecPerTrk 24 /* Track size [sector] (2) */ 00408 #define BPB_NumHeads 26 /* Number of heads (2) */ 00409 #define BPB_HiddSec 28 /* Number of special hidden sectors (4) */ 00410 #define BPB_TotSec32 32 /* Volume size [sector] (4) */ 00411 #define BS_DrvNum 36 /* Physical drive number (2) */ 00412 #define BS_BootSig 38 /* Extended boot signature (1) */ 00413 #define BS_VolID 39 /* Volume serial number (4) */ 00414 #define BS_VolLab 43 /* Volume label (8) */ 00415 #define BS_FilSysType 54 /* File system type (1) */ 00416 #define BPB_FATSz32 36 /* FAT size [sector] (4) */ 00417 #define BPB_ExtFlags 40 /* Extended flags (2) */ 00418 #define BPB_FSVer 42 /* File system version (2) */ 00419 #define BPB_RootClus 44 /* Root dir first cluster (4) */ 00420 #define BPB_FSInfo 48 /* Offset of FSInfo sector (2) */ 00421 #define BPB_BkBootSec 50 /* Offset of backup boot sectot (2) */ 00422 #define BS_DrvNum32 64 /* Physical drive number (2) */ 00423 #define BS_BootSig32 66 /* Extended boot signature (1) */ 00424 #define BS_VolID32 67 /* Volume serial number (4) */ 00425 #define BS_VolLab32 71 /* Volume label (8) */ 00426 #define BS_FilSysType32 82 /* File system type (1) */ 00427 #define FSI_LeadSig 0 /* FSI: Leading signature (4) */ 00428 #define FSI_StrucSig 484 /* FSI: Structure signature (4) */ 00429 #define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */ 00430 #define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */ 00431 #define MBR_Table 446 /* MBR: Partition table offset (2) */ 00432 #define SZ_PTE 16 /* MBR: Size of a partition table entry */ 00433 #define BS_55AA 510 /* Boot sector signature (2) */ 00434 00435 #define DIR_Name 0 /* Short file name (11) */ 00436 #define DIR_Attr 11 /* Attribute (1) */ 00437 #define DIR_NTres 12 /* NT flag (1) */ 00438 #define DIR_CrtTime 14 /* Created time (2) */ 00439 #define DIR_CrtDate 16 /* Created date (2) */ 00440 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */ 00441 #define DIR_WrtTime 22 /* Modified time (2) */ 00442 #define DIR_WrtDate 24 /* Modified date (2) */ 00443 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */ 00444 #define DIR_FileSize 28 /* File size (4) */ 00445 #define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */ 00446 #define LDIR_Attr 11 /* LFN attribute (1) */ 00447 #define LDIR_Type 12 /* LFN type (1) */ 00448 #define LDIR_Chksum 13 /* Sum of corresponding SFN entry */ 00449 #define LDIR_FstClusLO 26 /* Filled by zero (0) */ 00450 #define SZ_DIR 32 /* Size of a directory entry */ 00451 #define LLE 0x40 /* Last long entry flag in LDIR_Ord */ 00452 #define DDE 0xE5 /* Deleted directory enrty mark in DIR_Name[0] */ 00453 #define NDDE 0x05 /* Replacement of a character collides with DDE */ 00454 00455 00456 /*------------------------------------------------------------*/ 00457 /* Work area */ 00458 00459 #if _VOLUMES 00460 static 00461 FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */ 00462 #else 00463 #error Number of drives must not be 0. 00464 #endif 00465 00466 static 00467 WORD Fsid; /* File system mount ID */ 00468 00469 #if _FS_RPATH 00470 static 00471 BYTE CurrVol; /* Current drive */ 00472 #endif 00473 00474 #if _FS_SHARE 00475 static 00476 FILESEM Files[_FS_SHARE]; /* File lock semaphores */ 00477 #endif 00478 00479 #if _USE_LFN == 0 /* No LFN */ 00480 #define DEF_NAMEBUF BYTE sfn[12] 00481 #define INIT_BUF(dobj) (dobj).fn = sfn 00482 #define FREE_BUF() 00483 00484 #elif _USE_LFN == 1 /* LFN with static LFN working buffer */ 00485 static WCHAR LfnBuf[_MAX_LFN+1]; 00486 #define DEF_NAMEBUF BYTE sfn[12] 00487 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; } 00488 #define FREE_BUF() 00489 00490 #elif _USE_LFN == 2 /* LFN with dynamic LFN working buffer on the stack */ 00491 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1] 00492 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; } 00493 #define FREE_BUF() 00494 00495 #elif _USE_LFN == 3 /* LFN with dynamic LFN working buffer on the heap */ 00496 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn 00497 #define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \ 00498 if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \ 00499 (dobj).lfn = lfn; (dobj).fn = sfn; } 00500 #define FREE_BUF() ff_memfree(lfn) 00501 00502 #else 00503 #error Wrong LFN configuration. 00504 #endif 00505 00506 00507 00508 00509 /*-------------------------------------------------------------------------- 00510 00511 Module Private Functions 00512 00513 ---------------------------------------------------------------------------*/ 00514 00515 //static FATFS *FatFs[_DRIVES]; /* Pointer to the file system objects (logical drives) */ 00516 //static WORD fsid; /* File system mount ID */ 00517 00518 /*-----------------------------------------------------------------------*/ 00519 /* String functions */ 00520 /*-----------------------------------------------------------------------*/ 00521 00522 /* Copy memory to memory */ 00523 static 00524 void mem_cpy (void* dst, const void* src, UINT cnt) { 00525 BYTE *d = (BYTE*)dst; 00526 const BYTE *s = (const BYTE*)src; 00527 00528 #if _WORD_ACCESS == 1 00529 while (cnt >= sizeof(int)) { 00530 *(int*)d = *(int*)s; 00531 d += sizeof(int); s += sizeof(int); 00532 cnt -= sizeof(int); 00533 } 00534 #endif 00535 while (cnt--) 00536 *d++ = *s++; 00537 } 00538 00539 /* Fill memory */ 00540 static 00541 void mem_set (void* dst, int val, UINT cnt) { 00542 BYTE *d = (BYTE*)dst; 00543 00544 while (cnt--) 00545 *d++ = (BYTE)val; 00546 } 00547 00548 /* Compare memory to memory */ 00549 static 00550 int mem_cmp (const void* dst, const void* src, UINT cnt) { 00551 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; 00552 int r = 0; 00553 00554 while (cnt-- && (r = *d++ - *s++) == 0) ; 00555 return r; 00556 } 00557 00558 /* Check if chr is contained in the string */ 00559 static 00560 int chk_chr (const char* str, int chr) { 00561 while (*str && *str != chr) str++; 00562 return *str; 00563 } 00564 00565 00566 00567 /*-----------------------------------------------------------------------*/ 00568 /* Request/Release grant to access the volume */ 00569 /*-----------------------------------------------------------------------*/ 00570 #if _FS_REENTRANT 00571 00572 static 00573 int lock_fs ( 00574 FATFS *fs /* File system object */ 00575 ) 00576 { 00577 return ff_req_grant(fs->sobj); 00578 } 00579 00580 00581 static 00582 void unlock_fs ( 00583 FATFS *fs, /* File system object */ 00584 FRESULT res /* Result code to be returned */ 00585 ) 00586 { 00587 if (res != FR_NOT_ENABLED && 00588 res != FR_INVALID_DRIVE && 00589 res != FR_INVALID_OBJECT && 00590 res != FR_TIMEOUT) { 00591 ff_rel_grant(fs->sobj); 00592 } 00593 } 00594 #endif 00595 00596 00597 00598 /*-----------------------------------------------------------------------*/ 00599 /* File shareing control functions */ 00600 /*-----------------------------------------------------------------------*/ 00601 #if _FS_SHARE 00602 00603 static 00604 FRESULT chk_lock ( /* Check if the file can be accessed */ 00605 DIR* dj, /* Directory object pointing the file to be checked */ 00606 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ 00607 ) 00608 { 00609 UINT i, be; 00610 00611 /* Search file semaphore table */ 00612 for (i = be = 0; i < _FS_SHARE; i++) { 00613 if (Files[i].fs) { /* Existing entry */ 00614 if (Files[i].fs == dj->fs && /* Check if the file matched with an open file */ 00615 Files[i].clu == dj->sclust && 00616 Files[i].idx == dj->index) break; 00617 } else { /* Blank entry */ 00618 be++; 00619 } 00620 } 00621 if (i == _FS_SHARE) /* The file is not opened */ 00622 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new file? */ 00623 00624 /* The file has been opened. Reject any open against writing file and all write mode open */ 00625 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK; 00626 } 00627 00628 00629 static 00630 int enq_lock ( /* Check if an entry is available for a new file */ 00631 FATFS* fs /* File system object */ 00632 ) 00633 { 00634 UINT i; 00635 00636 for (i = 0; i < _FS_SHARE && Files[i].fs; i++) ; 00637 return (i == _FS_SHARE) ? 0 : 1; 00638 } 00639 00640 00641 static 00642 UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */ 00643 DIR* dj, /* Directory object pointing the file to register or increment */ 00644 int acc /* Desired access mode (0:Read, !0:Write) */ 00645 ) 00646 { 00647 UINT i; 00648 00649 00650 for (i = 0; i < _FS_SHARE; i++) { /* Find the file */ 00651 if (Files[i].fs == dj->fs && 00652 Files[i].clu == dj->sclust && 00653 Files[i].idx == dj->index) break; 00654 } 00655 00656 if (i == _FS_SHARE) { /* Not opened. Register it as new. */ 00657 for (i = 0; i < _FS_SHARE && Files[i].fs; i++) ; 00658 if (i == _FS_SHARE) return 0; /* No space to register (int err) */ 00659 Files[i].fs = dj->fs; 00660 Files[i].clu = dj->sclust; 00661 Files[i].idx = dj->index; 00662 Files[i].ctr = 0; 00663 } 00664 00665 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */ 00666 00667 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */ 00668 00669 return i + 1; 00670 } 00671 00672 00673 static 00674 FRESULT dec_lock ( /* Decrement file open counter */ 00675 UINT i /* Semaphore index */ 00676 ) 00677 { 00678 WORD n; 00679 FRESULT res; 00680 00681 00682 if (--i < _FS_SHARE) { 00683 n = Files[i].ctr; 00684 if (n == 0x100) n = 0; 00685 if (n) n--; 00686 Files[i].ctr = n; 00687 if (!n) Files[i].fs = 0; 00688 res = FR_OK; 00689 } else { 00690 res = FR_INT_ERR; 00691 } 00692 return res; 00693 } 00694 00695 00696 static 00697 void clear_lock ( /* Clear lock entries of the volume */ 00698 FATFS *fs 00699 ) 00700 { 00701 UINT i; 00702 00703 for (i = 0; i < _FS_SHARE; i++) { 00704 if (Files[i].fs == fs) Files[i].fs = 0; 00705 } 00706 } 00707 #endif 00708 00709 00710 00711 /*-----------------------------------------------------------------------*/ 00712 /* Change window offset */ 00713 /*-----------------------------------------------------------------------*/ 00714 00715 static 00716 FRESULT move_window ( 00717 FATFS *fs, /* File system object */ 00718 DWORD sector /* Sector number to make appearance in the fs->win[] */ 00719 ) /* Move to zero only writes back dirty window */ 00720 { 00721 DWORD wsect; 00722 00723 00724 wsect = fs->winsect; 00725 if (wsect != sector) { /* Changed current window */ 00726 #if !_FS_READONLY 00727 if (fs->wflag) { /* Write back dirty window if needed */ 00728 if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) 00729 return FR_DISK_ERR; 00730 fs->wflag = 0; 00731 if (wsect < (fs->fatbase + fs->fsize)) { /* In FAT area */ 00732 BYTE nf; 00733 for (nf = fs->n_fats; nf > 1; nf--) { /* Reflect the change to all FAT copies */ 00734 wsect += fs->fsize; 00735 disk_write(fs->drv, fs->win, wsect, 1); 00736 } 00737 } 00738 } 00739 #endif 00740 if (sector) { 00741 if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) 00742 return FR_DISK_ERR; 00743 fs->winsect = sector; 00744 } 00745 } 00746 00747 return FR_OK; 00748 } 00749 00750 00751 00752 00753 /*-----------------------------------------------------------------------*/ 00754 /* Clean-up cached data */ 00755 /*-----------------------------------------------------------------------*/ 00756 #if !_FS_READONLY 00757 static 00758 FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */ 00759 FATFS *fs /* File system object */ 00760 ) 00761 { 00762 FRESULT res; 00763 00764 00765 res = move_window(fs, 0); 00766 if (res == FR_OK) { 00767 /* Update FSInfo sector if needed */ 00768 if (fs->fs_type == FS_FAT32 && fs->fsi_flag) { 00769 fs->winsect = 0; 00770 /* Create FSInfo structure */ 00771 mem_set(fs->win, 0, 512); 00772 ST_WORD(fs->win+BS_55AA, 0xAA55); 00773 ST_DWORD(fs->win+FSI_LeadSig, 0x41615252); 00774 ST_DWORD(fs->win+FSI_StrucSig, 0x61417272); 00775 ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust); 00776 ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust); 00777 /* Write it into the FSInfo sector */ 00778 disk_write(fs->drv, fs->win, fs->fsi_sector, 1); 00779 fs->fsi_flag = 0; 00780 } 00781 /* Make sure that no pending write process in the physical drive */ 00782 if (disk_ioctl(fs->drv, CTRL_SYNC, (void*)0) != RES_OK) 00783 res = FR_DISK_ERR; 00784 } 00785 00786 return res; 00787 } 00788 #endif 00789 00790 00791 00792 00793 /*-----------------------------------------------------------------------*/ 00794 /* Get sector# from cluster# */ 00795 /*-----------------------------------------------------------------------*/ 00796 00797 00798 DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */ 00799 FATFS *fs, /* File system object */ 00800 DWORD clst /* Cluster# to be converted */ 00801 ) 00802 { 00803 clst -= 2; 00804 if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */ 00805 return clst * fs->csize + fs->database; 00806 } 00807 00808 00809 00810 00811 /*-----------------------------------------------------------------------*/ 00812 /* FAT access - Read value of a FAT entry */ 00813 /*-----------------------------------------------------------------------*/ 00814 00815 00816 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */ 00817 FATFS *fs, /* File system object */ 00818 DWORD clst /* Cluster# to get the link information */ 00819 ) 00820 { 00821 UINT wc, bc; 00822 BYTE *p; 00823 00824 00825 if (clst < 2 || clst >= fs->n_fatent) /* Chack range */ 00826 return 1; 00827 00828 switch (fs->fs_type) { 00829 case FS_FAT12 : 00830 bc = (UINT)clst; bc += bc / 2; 00831 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break; 00832 wc = fs->win[bc % SS(fs)]; bc++; 00833 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break; 00834 wc |= fs->win[bc % SS(fs)] << 8; 00835 return (clst & 1) ? (wc >> 4) : (wc & 0xFFF); 00836 00837 case FS_FAT16 : 00838 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break; 00839 p = &fs->win[clst * 2 % SS(fs)]; 00840 return LD_WORD(p); 00841 00842 case FS_FAT32 : 00843 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break; 00844 p = &fs->win[clst * 4 % SS(fs)]; 00845 return LD_DWORD(p) & 0x0FFFFFFF; 00846 } 00847 00848 return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */ 00849 } 00850 00851 00852 00853 00854 /*-----------------------------------------------------------------------*/ 00855 /* FAT access - Change value of a FAT entry */ 00856 /*-----------------------------------------------------------------------*/ 00857 #if !_FS_READONLY 00858 00859 FRESULT put_fat ( 00860 FATFS *fs, /* File system object */ 00861 DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */ 00862 DWORD val /* New value to mark the cluster */ 00863 ) 00864 { 00865 UINT bc; 00866 BYTE *p; 00867 FRESULT res; 00868 00869 00870 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ 00871 res = FR_INT_ERR; 00872 00873 } else { 00874 switch (fs->fs_type) { 00875 case FS_FAT12 : 00876 bc = clst; bc += bc / 2; 00877 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 00878 if (res != FR_OK) break; 00879 p = &fs->win[bc % SS(fs)]; 00880 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; 00881 bc++; 00882 fs->wflag = 1; 00883 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 00884 if (res != FR_OK) break; 00885 p = &fs->win[bc % SS(fs)]; 00886 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); 00887 break; 00888 00889 case FS_FAT16 : 00890 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); 00891 if (res != FR_OK) break; 00892 p = &fs->win[clst * 2 % SS(fs)]; 00893 ST_WORD(p, (WORD)val); 00894 break; 00895 00896 case FS_FAT32 : 00897 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); 00898 if (res != FR_OK) break; 00899 p = &fs->win[clst * 4 % SS(fs)]; 00900 val |= LD_DWORD(p) & 0xF0000000; 00901 ST_DWORD(p, val); 00902 break; 00903 00904 default : 00905 res = FR_INT_ERR; 00906 } 00907 fs->wflag = 1; 00908 } 00909 00910 return res; 00911 } 00912 #endif /* !_FS_READONLY */ 00913 00914 00915 00916 00917 /*-----------------------------------------------------------------------*/ 00918 /* FAT handling - Remove a cluster chain */ 00919 /*-----------------------------------------------------------------------*/ 00920 #if !_FS_READONLY 00921 static 00922 FRESULT remove_chain ( 00923 FATFS *fs, /* File system object */ 00924 DWORD clst /* Cluster# to remove a chain from */ 00925 ) 00926 { 00927 FRESULT res; 00928 DWORD nxt; 00929 #if _USE_ERASE 00930 DWORD scl = clst, ecl = clst, resion[2]; 00931 #endif 00932 00933 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ 00934 res = FR_INT_ERR; 00935 00936 } else { 00937 res = FR_OK; 00938 while (clst < fs->n_fatent) { /* Not a last link? */ 00939 nxt = get_fat(fs, clst); /* Get cluster status */ 00940 if (nxt == 0) break; /* Empty cluster? */ 00941 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */ 00942 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */ 00943 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */ 00944 if (res != FR_OK) break; 00945 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */ 00946 fs->free_clust++; 00947 fs->fsi_flag = 1; 00948 } 00949 #if _USE_ERASE 00950 if (ecl + 1 == nxt) { /* Next cluster is contiguous */ 00951 ecl = nxt; 00952 } else { /* End of contiguous clusters */ 00953 resion[0] = clust2sect(fs, scl); /* Start sector */ 00954 resion[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ 00955 disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, resion); /* Erase the block */ 00956 scl = ecl = nxt; 00957 } 00958 #endif 00959 clst = nxt; /* Next cluster */ 00960 } 00961 } 00962 00963 return res; 00964 } 00965 #endif 00966 00967 00968 00969 00970 /*-----------------------------------------------------------------------*/ 00971 /* FAT handling - Stretch or Create a cluster chain */ 00972 /*-----------------------------------------------------------------------*/ 00973 #if !_FS_READONLY 00974 static 00975 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ 00976 FATFS *fs, /* File system object */ 00977 DWORD clst /* Cluster# to stretch. 0 means create a new chain. */ 00978 ) 00979 { 00980 DWORD cs, ncl, scl; 00981 FRESULT res; 00982 00983 00984 if (clst == 0) { /* Create a new chain */ 00985 scl = fs->last_clust; /* Get suggested start point */ 00986 if (!scl || scl >= fs->n_fatent) scl = 1; 00987 } 00988 else { /* Stretch the current chain */ 00989 cs = get_fat(fs, clst); /* Check the cluster status */ 00990 if (cs < 2) return 1; /* It is an invalid cluster */ 00991 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */ 00992 scl = clst; 00993 } 00994 00995 ncl = scl; /* Start cluster */ 00996 for (;;) { 00997 ncl++; /* Next cluster */ 00998 if (ncl >= fs->n_fatent) { /* Wrap around */ 00999 ncl = 2; 01000 if (ncl > scl) return 0; /* No free cluster */ 01001 } 01002 cs = get_fat(fs, ncl); /* Get the cluster status */ 01003 if (cs == 0) break; /* Found a free cluster */ 01004 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */ 01005 return cs; 01006 if (ncl == scl) return 0; /* No free cluster */ 01007 } 01008 01009 res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */ 01010 if (res == FR_OK && clst != 0) { 01011 res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */ 01012 } 01013 if (res == FR_OK) { 01014 fs->last_clust = ncl; /* Update FSINFO */ 01015 if (fs->free_clust != 0xFFFFFFFF) { 01016 fs->free_clust--; 01017 fs->fsi_flag = 1; 01018 } 01019 } else { 01020 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; 01021 } 01022 01023 return ncl; /* Return new cluster number or error code */ 01024 } 01025 #endif /* !_FS_READONLY */ 01026 01027 01028 01029 /*-----------------------------------------------------------------------*/ 01030 /* FAT handling - Convert offset into cluster with link map table */ 01031 /*-----------------------------------------------------------------------*/ 01032 01033 #if _USE_FASTSEEK 01034 static 01035 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ 01036 FIL* fp, /* Pointer to the file object */ 01037 DWORD ofs /* File offset to be converted to cluster# */ 01038 ) 01039 { 01040 DWORD cl, ncl, *tbl; 01041 01042 01043 tbl = fp->cltbl + 1; /* Top of CLMT */ 01044 cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */ 01045 for (;;) { 01046 ncl = *tbl++; /* Number of cluters in the fragment */ 01047 if (!ncl) return 0; /* End of table? (error) */ 01048 if (cl < ncl) break; /* In this fragment? */ 01049 cl -= ncl; tbl++; /* Next fragment */ 01050 } 01051 return cl + *tbl; /* Return the cluster number */ 01052 } 01053 #endif /* _USE_FASTSEEK */ 01054 01055 01056 01057 /*-----------------------------------------------------------------------*/ 01058 /* Directory handling - Set directory index */ 01059 /*-----------------------------------------------------------------------*/ 01060 01061 static 01062 FRESULT dir_sdi ( 01063 DIR_t *dj, /* Pointer to directory object */ 01064 WORD idx /* Directory index number */ 01065 ) 01066 { 01067 DWORD clst; 01068 WORD ic; 01069 01070 01071 dj->index = idx; 01072 clst = dj->sclust; 01073 if (clst == 1 || clst >= dj->fs->n_fatent) /* Check start cluster range */ 01074 return FR_INT_ERR; 01075 if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ 01076 clst = dj->fs->dirbase; 01077 01078 if (clst == 0) { /* Static table (root-dir in FAT12/16) */ 01079 dj->clust = clst; 01080 if (idx >= dj->fs->n_rootdir) /* Index is out of range */ 01081 return FR_INT_ERR; 01082 dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */ 01083 } 01084 else { /* Dynamic table (sub-dirs or root-dir in FAT32) */ 01085 ic = SS(dj->fs) / SZ_DIR * dj->fs->csize; /* Entries per cluster */ 01086 while (idx >= ic) { /* Follow cluster chain */ 01087 clst = get_fat(dj->fs, clst); /* Get next cluster */ 01088 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 01089 if (clst < 2 || clst >= dj->fs->n_fatent) /* Reached to end of table or int error */ 01090 return FR_INT_ERR; 01091 idx -= ic; 01092 } 01093 dj->clust = clst; 01094 dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */ 01095 } 01096 01097 dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */ 01098 01099 return FR_OK; /* Seek succeeded */ 01100 } 01101 01102 01103 01104 01105 /*-----------------------------------------------------------------------*/ 01106 /* Directory handling - Move directory index next */ 01107 /*-----------------------------------------------------------------------*/ 01108 01109 static 01110 FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */ 01111 DIR_t *dj, /* Pointer to directory object */ 01112 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ 01113 ) 01114 { 01115 DWORD clst; 01116 WORD i; 01117 01118 01119 i = dj->index + 1; 01120 if (!i || !dj->sect) /* Report EOT when index has reached 65535 */ 01121 return FR_NO_FILE; 01122 01123 if (!(i % (SS(dj->fs) / SZ_DIR))) { /* Sector changed? */ 01124 dj->sect++; /* Next sector */ 01125 01126 if (dj->clust == 0) { /* Static table */ 01127 if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */ 01128 return FR_NO_FILE; 01129 } 01130 else { /* Dynamic table */ 01131 if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */ 01132 clst = get_fat(dj->fs, dj->clust); /* Get next cluster */ 01133 if (clst <= 1) return FR_INT_ERR; 01134 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 01135 if (clst >= dj->fs->n_fatent) { /* When it reached end of dynamic table */ 01136 #if !_FS_READONLY 01137 BYTE c; 01138 if (!stretch) return FR_NO_FILE; /* When do not stretch, report EOT */ 01139 clst = create_chain(dj->fs, dj->clust); /* Stretch cluster chain */ 01140 if (clst == 0) return FR_DENIED; /* No free cluster */ 01141 if (clst == 1) return FR_INT_ERR; 01142 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 01143 /* Clean-up stretched table */ 01144 if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */ 01145 mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */ 01146 dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */ 01147 for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */ 01148 dj->fs->wflag = 1; 01149 if (move_window(dj->fs, 0)) return FR_DISK_ERR; 01150 dj->fs->winsect++; 01151 } 01152 dj->fs->winsect -= c; /* Rewind window address */ 01153 #else 01154 return FR_NO_FILE; /* Report EOT */ 01155 #endif 01156 } 01157 dj->clust = clst; /* Initialize data for new cluster */ 01158 dj->sect = clust2sect(dj->fs, clst); 01159 } 01160 } 01161 } 01162 01163 dj->index = i; 01164 dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; 01165 01166 return FR_OK; 01167 } 01168 01169 01170 01171 01172 /*-----------------------------------------------------------------------*/ 01173 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */ 01174 /*-----------------------------------------------------------------------*/ 01175 #if _USE_LFN 01176 static 01177 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */ 01178 01179 01180 static 01181 int cmp_lfn ( /* 1:Matched, 0:Not matched */ 01182 WCHAR *lfnbuf, /* Pointer to the LFN to be compared */ 01183 BYTE *dir /* Pointer to the directory entry containing a part of LFN */ 01184 ) 01185 { 01186 UINT i, s; 01187 WCHAR wc, uc; 01188 01189 01190 i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13; /* Get offset in the LFN buffer */ 01191 s = 0; wc = 1; 01192 do { 01193 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ 01194 if (wc) { /* Last char has not been processed */ 01195 wc = ff_wtoupper(uc); /* Convert it to upper case */ 01196 if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */ 01197 return 0; /* Not matched */ 01198 } else { 01199 if (uc != 0xFFFF) return 0; /* Check filler */ 01200 } 01201 } while (++s < 13); /* Repeat until all chars in the entry are checked */ 01202 01203 if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i]) /* Last segment matched but different length */ 01204 return 0; 01205 01206 return 1; /* The part of LFN matched */ 01207 } 01208 01209 01210 01211 static 01212 int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */ 01213 WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */ 01214 BYTE *dir /* Pointer to the directory entry */ 01215 ) 01216 { 01217 UINT i, s; 01218 WCHAR wc, uc; 01219 01220 01221 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 01222 01223 s = 0; wc = 1; 01224 do { 01225 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ 01226 if (wc) { /* Last char has not been processed */ 01227 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 01228 lfnbuf[i++] = wc = uc; /* Store it */ 01229 } else { 01230 if (uc != 0xFFFF) return 0; /* Check filler */ 01231 } 01232 } while (++s < 13); /* Read all character in the entry */ 01233 01234 if (dir[LDIR_Ord] & LLE) { /* Put terminator if it is the last LFN part */ 01235 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 01236 lfnbuf[i] = 0; 01237 } 01238 01239 return 1; 01240 } 01241 01242 01243 #if !_FS_READONLY 01244 static 01245 void fit_lfn ( 01246 const WCHAR *lfnbuf, /* Pointer to the LFN buffer */ 01247 BYTE *dir, /* Pointer to the directory entry */ 01248 BYTE ord, /* LFN order (1-20) */ 01249 BYTE sum /* SFN sum */ 01250 ) 01251 { 01252 UINT i, s; 01253 WCHAR wc; 01254 01255 01256 dir[LDIR_Chksum] = sum; /* Set check sum */ 01257 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ 01258 dir[LDIR_Type] = 0; 01259 ST_WORD(dir+LDIR_FstClusLO, 0); 01260 01261 i = (ord - 1) * 13; /* Get offset in the LFN buffer */ 01262 s = wc = 0; 01263 do { 01264 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */ 01265 ST_WORD(dir+LfnOfs[s], wc); /* Put it */ 01266 if (!wc) wc = 0xFFFF; /* Padding chars following last char */ 01267 } while (++s < 13); 01268 if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE; /* Bottom LFN part is the start of LFN sequence */ 01269 dir[LDIR_Ord] = ord; /* Set the LFN order */ 01270 } 01271 01272 #endif 01273 #endif 01274 01275 01276 01277 /*-----------------------------------------------------------------------*/ 01278 /* Create numbered name */ 01279 /*-----------------------------------------------------------------------*/ 01280 #if _USE_LFN 01281 void gen_numname ( 01282 BYTE *dst, /* Pointer to generated SFN */ 01283 const BYTE *src, /* Pointer to source SFN to be modified */ 01284 const WCHAR *lfn, /* Pointer to LFN */ 01285 WORD seq /* Sequence number */ 01286 ) 01287 { 01288 BYTE ns[8], c; 01289 UINT i, j; 01290 01291 01292 mem_cpy(dst, src, 11); 01293 01294 if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */ 01295 do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; while (*lfn); 01296 } 01297 01298 /* itoa (hexdecimal) */ 01299 i = 7; 01300 do { 01301 c = (seq % 16) + '0'; 01302 if (c > '9') c += 7; 01303 ns[i--] = c; 01304 seq /= 16; 01305 } while (seq); 01306 ns[i] = '~'; 01307 01308 /* Append the number */ 01309 for (j = 0; j < i && dst[j] != ' '; j++) { 01310 if (IsDBCS1(dst[j])) { 01311 if (j == i - 1) break; 01312 j++; 01313 } 01314 } 01315 do { 01316 dst[j++] = (i < 8) ? ns[i++] : ' '; 01317 } while (j < 8); 01318 } 01319 #endif 01320 01321 01322 01323 01324 /*-----------------------------------------------------------------------*/ 01325 /* Calculate sum of an SFN */ 01326 /*-----------------------------------------------------------------------*/ 01327 #if _USE_LFN 01328 static 01329 BYTE sum_sfn ( 01330 const BYTE *dir /* Ptr to directory entry */ 01331 ) 01332 { 01333 BYTE sum = 0; 01334 UINT n = 11; 01335 01336 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n); 01337 return sum; 01338 } 01339 #endif 01340 01341 01342 01343 01344 /*-----------------------------------------------------------------------*/ 01345 /* Directory handling - Find an object in the directory */ 01346 /*-----------------------------------------------------------------------*/ 01347 01348 static 01349 FRESULT dir_find ( 01350 DIR_t *dj /* Pointer to the directory object linked to the file name */ 01351 ) 01352 { 01353 FRESULT res; 01354 BYTE c, *dir; 01355 #if _USE_LFN 01356 BYTE a, ord, sum; 01357 #endif 01358 01359 res = dir_sdi(dj, 0); /* Rewind directory object */ 01360 if (res != FR_OK) return res; 01361 01362 #if _USE_LFN 01363 ord = sum = 0xFF; 01364 #endif 01365 do { 01366 res = move_window(dj->fs, dj->sect); 01367 if (res != FR_OK) break; 01368 dir = dj->dir; /* Ptr to the directory entry of current index */ 01369 c = dir[DIR_Name]; 01370 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 01371 #if _USE_LFN /* LFN configuration */ 01372 a = dir[DIR_Attr] & AM_MASK; 01373 if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 01374 ord = 0xFF; 01375 } else { 01376 if (a == AM_LFN) { /* An LFN entry is found */ 01377 if (dj->lfn) { 01378 if (c & LLE) { /* Is it start of LFN sequence? */ 01379 sum = dir[LDIR_Chksum]; 01380 c &= ~LLE; ord = c; /* LFN start order */ 01381 dj->lfn_idx = dj->index; 01382 } 01383 /* Check validity of the LFN entry and compare it with given name */ 01384 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; 01385 } 01386 } else { /* An SFN entry is found */ 01387 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */ 01388 ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */ 01389 if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */ 01390 } 01391 } 01392 #else /* Non LFN configuration */ 01393 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */ 01394 break; 01395 #endif 01396 res = dir_next(dj, 0); /* Next entry */ 01397 } while (res == FR_OK); 01398 01399 return res; 01400 } 01401 01402 01403 01404 01405 /*-----------------------------------------------------------------------*/ 01406 /* Read an object from the directory */ 01407 /*-----------------------------------------------------------------------*/ 01408 #if _FS_MINIMIZE <= 1 01409 static 01410 FRESULT dir_read ( 01411 DIR_t *dj /* Pointer to the directory object that pointing the entry to be read */ 01412 ) 01413 { 01414 FRESULT res; 01415 BYTE c, *dir; 01416 #if _USE_LFN 01417 BYTE a, ord = 0xFF, sum = 0xFF; 01418 #endif 01419 01420 res = FR_NO_FILE; 01421 while (dj->sect) { 01422 res = move_window(dj->fs, dj->sect); 01423 if (res != FR_OK) break; 01424 dir = dj->dir; /* Ptr to the directory entry of current index */ 01425 c = dir[DIR_Name]; 01426 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 01427 #if _USE_LFN /* LFN configuration */ 01428 a = dir[DIR_Attr] & AM_MASK; 01429 if (c == DDE || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 01430 ord = 0xFF; 01431 } else { 01432 if (a == AM_LFN) { /* An LFN entry is found */ 01433 if (c & LLE) { /* Is it start of LFN sequence? */ 01434 sum = dir[LDIR_Chksum]; 01435 c &= ~LLE; ord = c; 01436 dj->lfn_idx = dj->index; 01437 } 01438 /* Check LFN validity and capture it */ 01439 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; 01440 } else { /* An SFN entry is found */ 01441 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */ 01442 dj->lfn_idx = 0xFFFF; /* It has no LFN. */ 01443 break; 01444 } 01445 } 01446 #else /* Non LFN configuration */ 01447 if (c != DDE && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */ 01448 break; 01449 #endif 01450 res = dir_next(dj, 0); /* Next entry */ 01451 if (res != FR_OK) break; 01452 } 01453 01454 if (res != FR_OK) dj->sect = 0; 01455 01456 return res; 01457 } 01458 #endif 01459 01460 01461 01462 /*-----------------------------------------------------------------------*/ 01463 /* Register an object to the directory */ 01464 /*-----------------------------------------------------------------------*/ 01465 #if !_FS_READONLY 01466 static 01467 FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */ 01468 DIR_t *dj /* Target directory with object name to be created */ 01469 ) 01470 { 01471 FRESULT res; 01472 BYTE c, *dir; 01473 #if _USE_LFN /* LFN configuration */ 01474 WORD n, ne, is; 01475 BYTE sn[12], *fn, sum; 01476 WCHAR *lfn; 01477 01478 01479 fn = dj->fn; lfn = dj->lfn; 01480 mem_cpy(sn, fn, 12); 01481 01482 if (_FS_RPATH && (sn[NS] & NS_DOT)) /* Cannot create dot entry */ 01483 return FR_INVALID_NAME; 01484 01485 if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ 01486 fn[NS] = 0; dj->lfn = 0; /* Find only SFN */ 01487 for (n = 1; n < 100; n++) { 01488 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */ 01489 res = dir_find(dj); /* Check if the name collides with existing SFN */ 01490 if (res != FR_OK) break; 01491 } 01492 if (n == 100) return FR_DENIED; /* Abort if too many collisions */ 01493 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ 01494 fn[NS] = sn[NS]; dj->lfn = lfn; 01495 } 01496 01497 if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve an SFN + LFN entries. */ 01498 for (ne = 0; lfn[ne]; ne++) ; 01499 ne = (ne + 25) / 13; 01500 } else { /* Otherwise reserve only an SFN entry. */ 01501 ne = 1; 01502 } 01503 01504 /* Reserve contiguous entries */ 01505 res = dir_sdi(dj, 0); 01506 if (res != FR_OK) return res; 01507 n = is = 0; 01508 do { 01509 res = move_window(dj->fs, dj->sect); 01510 if (res != FR_OK) break; 01511 c = *dj->dir; /* Check the entry status */ 01512 if (c == DDE || c == 0) { /* Is it a blank entry? */ 01513 if (n == 0) is = dj->index; /* First index of the contiguous entry */ 01514 if (++n == ne) break; /* A contiguous entry that required count is found */ 01515 } else { 01516 n = 0; /* Not a blank entry. Restart to search */ 01517 } 01518 res = dir_next(dj, 1); /* Next entry with table stretch */ 01519 } while (res == FR_OK); 01520 01521 if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */ 01522 res = dir_sdi(dj, is); 01523 if (res == FR_OK) { 01524 sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */ 01525 ne--; 01526 do { /* Store LFN entries in bottom first */ 01527 res = move_window(dj->fs, dj->sect); 01528 if (res != FR_OK) break; 01529 fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum); 01530 dj->fs->wflag = 1; 01531 res = dir_next(dj, 0); /* Next entry */ 01532 } while (res == FR_OK && --ne); 01533 } 01534 } 01535 01536 #else /* Non LFN configuration */ 01537 res = dir_sdi(dj, 0); 01538 if (res == FR_OK) { 01539 do { /* Find a blank entry for the SFN */ 01540 res = move_window(dj->fs, dj->sect); 01541 if (res != FR_OK) break; 01542 c = *dj->dir; 01543 if (c == DDE || c == 0) break; /* Is it a blank entry? */ 01544 res = dir_next(dj, 1); /* Next entry with table stretch */ 01545 } while (res == FR_OK); 01546 } 01547 #endif 01548 01549 if (res == FR_OK) { /* Initialize the SFN entry */ 01550 res = move_window(dj->fs, dj->sect); 01551 if (res == FR_OK) { 01552 dir = dj->dir; 01553 mem_set(dir, 0, SZ_DIR); /* Clean the entry */ 01554 mem_cpy(dir, dj->fn, 11); /* Put SFN */ 01555 #if _USE_LFN 01556 dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */ 01557 #endif 01558 dj->fs->wflag = 1; 01559 } 01560 } 01561 01562 return res; 01563 } 01564 #endif /* !_FS_READONLY */ 01565 01566 01567 01568 01569 /*-----------------------------------------------------------------------*/ 01570 /* Remove an object from the directory */ 01571 /*-----------------------------------------------------------------------*/ 01572 #if !_FS_READONLY && !_FS_MINIMIZE 01573 static 01574 FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */ 01575 DIR_t *dj /* Directory object pointing the entry to be removed */ 01576 ) 01577 { 01578 FRESULT res; 01579 #if _USE_LFN /* LFN configuration */ 01580 WORD i; 01581 01582 i = dj->index; /* SFN index */ 01583 res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */ 01584 if (res == FR_OK) { 01585 do { 01586 res = move_window(dj->fs, dj->sect); 01587 if (res != FR_OK) break; 01588 *dj->dir = DDE; /* Mark the entry "deleted" */ 01589 dj->fs->wflag = 1; 01590 if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */ 01591 res = dir_next(dj, 0); /* Next entry */ 01592 } while (res == FR_OK); 01593 if (res == FR_NO_FILE) res = FR_INT_ERR; 01594 } 01595 01596 #else /* Non LFN configuration */ 01597 res = dir_sdi(dj, dj->index); 01598 if (res == FR_OK) { 01599 res = move_window(dj->fs, dj->sect); 01600 if (res == FR_OK) { 01601 *dj->dir = DDE; /* Mark the entry "deleted" */ 01602 dj->fs->wflag = 1; 01603 } 01604 } 01605 #endif 01606 01607 return res; 01608 } 01609 #endif /* !_FS_READONLY */ 01610 01611 01612 01613 01614 /*-----------------------------------------------------------------------*/ 01615 /* Pick a segment and create the object name in directory form */ 01616 /*-----------------------------------------------------------------------*/ 01617 01618 static 01619 FRESULT create_name ( 01620 DIR_t *dj, /* Pointer to the directory object */ 01621 const TCHAR **path /* Pointer to pointer to the segment in the path string */ 01622 ) 01623 { 01624 #ifdef _EXCVT 01625 static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */ 01626 #endif 01627 01628 #if _USE_LFN /* LFN configuration */ 01629 BYTE b, cf; 01630 WCHAR w, *lfn; 01631 UINT i, ni, si, di; 01632 const TCHAR *p; 01633 01634 /* Create LFN in Unicode */ 01635 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ 01636 lfn = dj->lfn; 01637 si = di = 0; 01638 for (;;) { 01639 w = p[si++]; /* Get a character */ 01640 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */ 01641 if (di >= _MAX_LFN) /* Reject too long name */ 01642 return FR_INVALID_NAME; 01643 #if !_LFN_UNICODE 01644 w &= 0xFF; 01645 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ 01646 b = (BYTE)p[si++]; /* Get 2nd byte */ 01647 if (!IsDBCS2(b)) 01648 return FR_INVALID_NAME; /* Reject invalid sequence */ 01649 w = (w << 8) + b; /* Create a DBC */ 01650 } 01651 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */ 01652 if (!w) return FR_INVALID_NAME; /* Reject invalid code */ 01653 #endif 01654 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */ 01655 return FR_INVALID_NAME; 01656 lfn[di++] = w; /* Store the Unicode char */ 01657 } 01658 *path = &p[si]; /* Return pointer to the next segment */ 01659 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 01660 #if _FS_RPATH 01661 if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */ 01662 (di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) { 01663 lfn[di] = 0; 01664 for (i = 0; i < 11; i++) 01665 dj->fn[i] = (i < di) ? '.' : ' '; 01666 dj->fn[i] = cf | NS_DOT; /* This is a dot entry */ 01667 return FR_OK; 01668 } 01669 #endif 01670 while (di) { /* Strip trailing spaces and dots */ 01671 w = lfn[di-1]; 01672 if (w != ' ' && w != '.') break; 01673 di--; 01674 } 01675 if (!di) return FR_INVALID_NAME; /* Reject nul string */ 01676 01677 lfn[di] = 0; /* LFN is created */ 01678 01679 /* Create SFN in directory form */ 01680 mem_set(dj->fn, ' ', 11); 01681 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */ 01682 if (si) cf |= NS_LOSS | NS_LFN; 01683 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */ 01684 01685 b = i = 0; ni = 8; 01686 for (;;) { 01687 w = lfn[si++]; /* Get an LFN char */ 01688 if (!w) break; /* Break on end of the LFN */ 01689 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */ 01690 cf |= NS_LOSS | NS_LFN; continue; 01691 } 01692 01693 if (i >= ni || si == di) { /* Extension or end of SFN */ 01694 if (ni == 11) { /* Long extension */ 01695 cf |= NS_LOSS | NS_LFN; break; 01696 } 01697 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */ 01698 if (si > di) break; /* No extension */ 01699 si = di; i = 8; ni = 11; /* Enter extension section */ 01700 b <<= 2; continue; 01701 } 01702 01703 if (w >= 0x80) { /* Non ASCII char */ 01704 #ifdef _EXCVT 01705 w = ff_convert(w, 0); /* Unicode -> OEM code */ 01706 if (w) w = excvt[w - 0x80]; /* Convert extended char to upper (SBCS) */ 01707 #else 01708 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */ 01709 #endif 01710 cf |= NS_LFN; /* Force create LFN entry */ 01711 } 01712 01713 if (_DF1S && w >= 0x100) { /* Double byte char (always false on SBCS cfg) */ 01714 if (i >= ni - 1) { 01715 cf |= NS_LOSS | NS_LFN; i = ni; continue; 01716 } 01717 dj->fn[i++] = (BYTE)(w >> 8); 01718 } else { /* Single byte char */ 01719 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal chars for SFN */ 01720 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ 01721 } else { 01722 if (IsUpper(w)) { /* ASCII large capital */ 01723 b |= 2; 01724 } else { 01725 if (IsLower(w)) { /* ASCII small capital */ 01726 b |= 1; w -= 0x20; 01727 } 01728 } 01729 } 01730 } 01731 dj->fn[i++] = (BYTE)w; 01732 } 01733 01734 if (dj->fn[0] == DDE) dj->fn[0] = NDDE; /* If the first char collides with deleted mark, replace it with 0x05 */ 01735 01736 if (ni == 8) b <<= 2; 01737 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */ 01738 cf |= NS_LFN; 01739 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */ 01740 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */ 01741 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */ 01742 } 01743 01744 dj->fn[NS] = cf; /* SFN is created */ 01745 01746 return FR_OK; 01747 01748 01749 #else /* Non-LFN configuration */ 01750 BYTE b, c, d, *sfn; 01751 UINT ni, si, i; 01752 const char *p; 01753 01754 /* Create file name in directory form */ 01755 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ 01756 sfn = dj->fn; 01757 mem_set(sfn, ' ', 11); 01758 si = i = b = 0; ni = 8; 01759 #if _FS_RPATH 01760 if (p[si] == '.') { /* Is this a dot entry? */ 01761 for (;;) { 01762 c = (BYTE)p[si++]; 01763 if (c != '.' || si >= 3) break; 01764 sfn[i++] = c; 01765 } 01766 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; 01767 *path = &p[si]; /* Return pointer to the next segment */ 01768 sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */ 01769 return FR_OK; 01770 } 01771 #endif 01772 for (;;) { 01773 c = (BYTE)p[si++]; 01774 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */ 01775 if (c == '.' || i >= ni) { 01776 if (ni != 8 || c != '.') return FR_INVALID_NAME; 01777 i = 8; ni = 11; 01778 b <<= 2; continue; 01779 } 01780 if (c >= 0x80) { /* Extended char? */ 01781 b |= 3; /* Eliminate NT flag */ 01782 #ifdef _EXCVT 01783 c = excvt[c-0x80]; /* Upper conversion (SBCS) */ 01784 #else 01785 #if !_DF1S /* ASCII only cfg */ 01786 return FR_INVALID_NAME; 01787 #endif 01788 #endif 01789 } 01790 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ 01791 d = (BYTE)p[si++]; /* Get 2nd byte */ 01792 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */ 01793 return FR_INVALID_NAME; 01794 sfn[i++] = c; 01795 sfn[i++] = d; 01796 } else { /* Single byte code */ 01797 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */ 01798 return FR_INVALID_NAME; 01799 if (IsUpper(c)) { /* ASCII large capital? */ 01800 b |= 2; 01801 } else { 01802 if (IsLower(c)) { /* ASCII small capital? */ 01803 b |= 1; c -= 0x20; 01804 } 01805 } 01806 sfn[i++] = c; 01807 } 01808 } 01809 *path = &p[si]; /* Return pointer to the next segment */ 01810 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 01811 01812 if (!i) return FR_INVALID_NAME; /* Reject nul string */ 01813 if (sfn[0] == DDE) sfn[0] = NDDE; /* When first char collides with DDE, replace it with 0x05 */ 01814 01815 if (ni == 8) b <<= 2; 01816 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */ 01817 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */ 01818 01819 sfn[NS] = c; /* Store NT flag, File name is created */ 01820 01821 return FR_OK; 01822 #endif 01823 } 01824 01825 01826 01827 01828 /*-----------------------------------------------------------------------*/ 01829 /* Get file information from directory entry */ 01830 /*-----------------------------------------------------------------------*/ 01831 #if _FS_MINIMIZE <= 1 01832 static 01833 void get_fileinfo ( /* No return code */ 01834 DIR_t *dj, /* Pointer to the directory object */ 01835 FILINFO *fno /* Pointer to the file information to be filled */ 01836 ) 01837 { 01838 UINT i; 01839 BYTE nt, *dir; 01840 TCHAR *p, c; 01841 p = fno->fname; 01842 01843 if (dj->sect) { 01844 dir = dj->dir; 01845 nt = dir[DIR_NTres]; /* NT flag */ 01846 for (i = 0; i < 8; i++) { /* Copy name body */ 01847 c = dir[i]; 01848 if (c == ' ') break; 01849 if (c == NDDE) c = (TCHAR)DDE; 01850 if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20; 01851 #if _LFN_UNICODE 01852 if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1])) 01853 c = (c << 8) | dir[++i]; 01854 c = ff_convert(c, 1); 01855 if (!c) c = '?'; 01856 #endif 01857 *p++ = c; 01858 } 01859 if (dir[8] != ' ') { /* Copy name extension */ 01860 *p++ = '.'; 01861 for (i = 8; i < 11; i++) { 01862 c = dir[i]; 01863 if (c == ' ') break; 01864 if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20; 01865 #if _LFN_UNICODE 01866 if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1])) 01867 c = (c << 8) | dir[++i]; 01868 c = ff_convert(c, 1); 01869 if (!c) c = '?'; 01870 #endif 01871 *p++ = c; 01872 } 01873 } 01874 fno->fattrib = dir[DIR_Attr]; /* Attribute */ 01875 fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */ 01876 fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */ 01877 fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */ 01878 } 01879 *p = 0; /* Terminate SFN str by a \0 */ 01880 01881 #if _USE_LFN 01882 if (fno->lfname && fno->lfsize) { 01883 TCHAR *tp = fno->lfname; 01884 WCHAR w, *lfn; 01885 01886 i = 0; 01887 if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */ 01888 lfn = dj->lfn; 01889 while ((w = *lfn++) != 0) { /* Get an LFN char */ 01890 #if !_LFN_UNICODE 01891 w = ff_convert(w, 0); /* Unicode -> OEM conversion */ 01892 if (!w) { i = 0; break; } /* Could not convert, no LFN */ 01893 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */ 01894 tp[i++] = (TCHAR)(w >> 8); 01895 #endif 01896 if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overflow, no LFN */ 01897 tp[i++] = (TCHAR)w; 01898 } 01899 01900 } 01901 tp[i] = 0; /* Terminate the LFN str by a \0 */ 01902 } 01903 #endif 01904 } 01905 #endif /* _FS_MINIMIZE <= 1 */ 01906 01907 01908 01909 01910 /*-----------------------------------------------------------------------*/ 01911 /* Follow a file path */ 01912 /*-----------------------------------------------------------------------*/ 01913 01914 static 01915 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ 01916 DIR_t *dj, /* Directory object to return last directory and found object */ 01917 const TCHAR *path /* Full-path string to find a file or directory */ 01918 ) 01919 { 01920 FRESULT res; 01921 BYTE *dir, ns; 01922 01923 01924 #if _FS_RPATH 01925 if (*path == '/' || *path == '\\') { /* There is a heading separator */ 01926 path++; dj->sclust = 0; /* Strip it and start from the root dir */ 01927 } else { /* No heading separator */ 01928 dj->sclust = dj->fs->cdir; /* Start from the current dir */ 01929 } 01930 #else 01931 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */ 01932 path++; 01933 dj->sclust = 0; /* Start from the root dir */ 01934 #endif 01935 01936 if ((UINT)*path < ' ') { /* Nul path means the start directory itself */ 01937 res = dir_sdi(dj, 0); 01938 dj->dir = 0; 01939 01940 } else { /* Follow path */ 01941 for (;;) { 01942 res = create_name(dj, &path); /* Get a segment */ 01943 if (res != FR_OK) break; 01944 res = dir_find(dj); /* Find it */ 01945 ns = *(dj->fn+NS); 01946 if (res != FR_OK) { /* Failed to find the object */ 01947 if (res != FR_NO_FILE) break; /* Abort if any hard error occured */ 01948 /* Object not found */ 01949 if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exit */ 01950 dj->sclust = 0; dj->dir = 0; /* It is the root dir */ 01951 res = FR_OK; 01952 if (!(ns & NS_LAST)) continue; 01953 } else { /* Could not find the object */ 01954 if (!(ns & NS_LAST)) res = FR_NO_PATH; 01955 } 01956 break; 01957 } 01958 if (ns & NS_LAST) break; /* Last segment match. Function completed. */ 01959 dir = dj->dir; /* There is next segment. Follow the sub directory */ 01960 if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */ 01961 res = FR_NO_PATH; break; 01962 } 01963 dj->sclust = LD_CLUST(dir); 01964 } 01965 } 01966 01967 return res; 01968 } 01969 01970 01971 01972 01973 /*-----------------------------------------------------------------------*/ 01974 /* Load boot record and check if it is an FAT boot record */ 01975 /*-----------------------------------------------------------------------*/ 01976 01977 static 01978 BYTE check_fs ( /* 0:The FAT BR, 1:Valid BR but not an FAT, 2:Not a BR, 3:Disk error */ 01979 FATFS *fs, /* File system object */ 01980 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ 01981 ) 01982 { 01983 if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK) /* Load boot record */ 01984 return 3; 01985 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */ 01986 return 2; 01987 01988 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ 01989 return 0; 01990 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) 01991 return 0; 01992 01993 return 1; 01994 } 01995 01996 01997 01998 01999 /*-----------------------------------------------------------------------*/ 02000 /* Check if the file system object is valid or not */ 02001 /*-----------------------------------------------------------------------*/ 02002 02003 static 02004 FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occurred */ 02005 const TCHAR **path, /* Pointer to pointer to the path name (drive number) */ 02006 FATFS **rfs, /* Pointer to pointer to the found file system object */ 02007 BYTE chk_wp /* !=0: Check media write protection for write access */ 02008 ) 02009 { 02010 BYTE fmt, b, *tbl; 02011 UINT vol; 02012 DSTATUS stat; 02013 DWORD bsect, fasize, tsect, sysect, nclst, szbfat; 02014 WORD nrsv; 02015 const TCHAR *p = *path; 02016 FATFS *fs; 02017 02018 /* Get logical drive number from the path name */ 02019 vol = p[0] - '0'; /* Is there a drive number? */ 02020 if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */ 02021 p += 2; *path = p; /* Return pointer to the path name */ 02022 } else { /* No drive number is given */ 02023 #if _FS_RPATH 02024 vol = CurrVol; /* Use current drive */ 02025 #else 02026 vol = 0; /* Use drive 0 */ 02027 #endif 02028 } 02029 02030 /* Check if the logical drive is valid or not */ 02031 if (vol >= _VOLUMES) /* Is the drive number valid? */ 02032 return FR_INVALID_DRIVE; 02033 *rfs = fs = FatFs[vol]; /* Return pointer to the corresponding file system object */ 02034 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */ 02035 02036 ENTER_FF(fs); /* Lock file system */ 02037 02038 if (fs->fs_type) { /* If the logical drive has been mounted */ 02039 stat = disk_status(fs->drv); 02040 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */ 02041 #if !_FS_READONLY 02042 if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */ 02043 return FR_WRITE_PROTECTED; 02044 #endif 02045 return FR_OK; /* The file system object is valid */ 02046 } 02047 } 02048 02049 /* The logical drive must be mounted. */ 02050 /* Following code attempts to mount a volume. (analyze BPB and initialize the fs object) */ 02051 02052 fs->fs_type = 0; /* Clear the file system object */ 02053 fs->drv = (BYTE)LD2PD(vol); /* Bind the logical drive and a physical drive */ 02054 stat = disk_initialize(fs->drv); /* Initialize low level disk I/O layer */ 02055 if (stat & STA_NOINIT) /* Check if the initialization succeeded */ 02056 return FR_NOT_READY; /* Failed to initialize due to no media or hard error */ 02057 #if _MAX_SS != 512 /* Get disk sector size (variable sector size cfg only) */ 02058 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK) 02059 return FR_DISK_ERR; 02060 #endif 02061 #if !_FS_READONLY 02062 if (chk_wp && (stat & STA_PROTECT)) /* Check disk write protection if needed */ 02063 return FR_WRITE_PROTECTED; 02064 #endif 02065 /* Search FAT partition on the drive. Supports only generic partitionings, FDISK and SFD. */ 02066 fmt = check_fs(fs, bsect = 0); /* Check sector 0 if it is a VBR */ 02067 if (fmt == 1) { /* Not an FAT-VBR, the disk may be partitioned */ 02068 /* Check the partition listed in top of the partition table */ 02069 tbl = &fs->win[MBR_Table + LD2PT(vol) * SZ_PTE];/* Partition table */ 02070 if (tbl[4]) { /* Is the partition existing? */ 02071 bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */ 02072 fmt = check_fs(fs, bsect); /* Check the partition */ 02073 } 02074 } 02075 if (fmt == 3) return FR_DISK_ERR; 02076 if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */ 02077 02078 /* Following code initializes the file system object */ 02079 02080 if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */ 02081 return FR_NO_FILESYSTEM; 02082 02083 fasize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */ 02084 if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32); 02085 fs->fsize = fasize; 02086 02087 fs->n_fats = b = fs->win[BPB_NumFATs]; /* Number of FAT copies */ 02088 if (b != 1 && b != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */ 02089 fasize *= b; /* Number of sectors for FAT area */ 02090 02091 fs->csize = b = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */ 02092 if (!b || (b & (b - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */ 02093 02094 fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Number of root directory entries */ 02095 if (fs->n_rootdir % (SS(fs) / SZ_DIR)) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */ 02096 02097 tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */ 02098 if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32); 02099 02100 nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); /* Number of reserved sectors */ 02101 if (!nrsv) return FR_NO_FILESYSTEM; /* (BPB_RsvdSecCnt must not be 0) */ 02102 02103 /* Determine the FAT sub type */ 02104 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); /* RSV+FAT+DIR */ 02105 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 02106 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ 02107 if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 02108 fmt = FS_FAT12; 02109 if (nclst >= MIN_FAT16) fmt = FS_FAT16; 02110 if (nclst >= MIN_FAT32) fmt = FS_FAT32; 02111 02112 /* Boundaries and Limits */ 02113 fs->n_fatent = nclst + 2; /* Number of FAT entries */ 02114 fs->database = bsect + sysect; /* Data start sector */ 02115 fs->fatbase = bsect + nrsv; /* FAT start sector */ 02116 if (fmt == FS_FAT32) { 02117 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ 02118 fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */ 02119 szbfat = fs->n_fatent * 4; /* (Required FAT size) */ 02120 } else { 02121 if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */ 02122 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ 02123 szbfat = (fmt == FS_FAT16) ? /* (Required FAT size) */ 02124 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); 02125 } 02126 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than required) */ 02127 return FR_NO_FILESYSTEM; 02128 02129 #if !_FS_READONLY 02130 /* Initialize cluster allocation information */ 02131 fs->free_clust = 0xFFFFFFFF; 02132 fs->last_clust = 0; 02133 02134 /* Get fsinfo if available */ 02135 if (fmt == FS_FAT32) { 02136 fs->fsi_flag = 0; 02137 fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo); 02138 if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK && 02139 LD_WORD(fs->win+BS_55AA) == 0xAA55 && 02140 LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 && 02141 LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) { 02142 fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free); 02143 fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count); 02144 } 02145 } 02146 #endif 02147 fs->fs_type = fmt; /* FAT sub-type */ 02148 fs->id = ++Fsid; /* File system mount ID */ 02149 fs->winsect = 0; /* Invalidate sector cache */ 02150 fs->wflag = 0; 02151 #if _FS_RPATH 02152 fs->cdir = 0; /* Current directory (root dir) */ 02153 #endif 02154 #if _FS_SHARE /* Clear file lock semaphores */ 02155 clear_lock(fs); 02156 #endif 02157 02158 return FR_OK; 02159 } 02160 02161 02162 02163 02164 /*-----------------------------------------------------------------------*/ 02165 /* Check if the file/dir object is valid or not */ 02166 /*-----------------------------------------------------------------------*/ 02167 02168 static 02169 FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */ 02170 FATFS *fs, /* Pointer to the file system object */ 02171 WORD id /* Member id of the target object to be checked */ 02172 ) 02173 { 02174 if (!fs || !fs->fs_type || fs->id != id) 02175 return FR_INVALID_OBJECT; 02176 02177 ENTER_FF(fs); /* Lock file system */ 02178 02179 if (disk_status(fs->drv) & STA_NOINIT) 02180 return FR_NOT_READY; 02181 02182 return FR_OK; 02183 } 02184 02185 02186 02187 02188 /*-------------------------------------------------------------------------- 02189 02190 Public Functions 02191 02192 --------------------------------------------------------------------------*/ 02193 02194 02195 02196 /*-----------------------------------------------------------------------*/ 02197 /* Mount/Unmount a Logical Drive */ 02198 /*-----------------------------------------------------------------------*/ 02199 02200 FRESULT f_mount ( 02201 BYTE vol, /* Logical drive number to be mounted/unmounted */ 02202 FATFS *fs /* Pointer to new file system object (NULL for unmount)*/ 02203 ) 02204 { 02205 FATFS *rfs; 02206 02207 02208 if (vol >= _VOLUMES) /* Check if the drive number is valid */ 02209 return FR_INVALID_DRIVE; 02210 rfs = FatFs[vol]; /* Get current fs object */ 02211 02212 if (rfs) { 02213 #if _FS_SHARE 02214 clear_lock(rfs); 02215 #endif 02216 #if _FS_REENTRANT /* Discard sync object of the current volume */ 02217 if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR; 02218 #endif 02219 rfs->fs_type = 0; /* Clear old fs object */ 02220 } 02221 02222 if (fs) { 02223 fs->fs_type = 0; /* Clear new fs object */ 02224 #if _FS_REENTRANT /* Create sync object for the new volume */ 02225 if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR; 02226 #endif 02227 } 02228 FatFs[vol] = fs; /* Register new fs object */ 02229 02230 return FR_OK; 02231 } 02232 02233 02234 02235 02236 /*-----------------------------------------------------------------------*/ 02237 /* Open or Create a File */ 02238 /*-----------------------------------------------------------------------*/ 02239 02240 FRESULT f_open ( 02241 FIL_t *fp, /* Pointer to the blank file object */ 02242 const TCHAR *path, /* Pointer to the file name */ 02243 BYTE mode /* Access mode and file open mode flags */ 02244 ) 02245 { 02246 FRESULT res; 02247 DIR_t dj; 02248 BYTE *dir; 02249 DEF_NAMEBUF; 02250 02251 02252 fp->fs = 0; /* Clear file object */ 02253 02254 #if !_FS_READONLY 02255 mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW; 02256 res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ)); 02257 #else 02258 mode &= FA_READ; 02259 res = chk_mounted(&path, &dj.fs, 0); 02260 #endif 02261 INIT_BUF(dj); 02262 if (res == FR_OK) 02263 res = follow_path(&dj, path); /* Follow the file path */ 02264 dir = dj.dir; 02265 02266 #if !_FS_READONLY /* R/W configuration */ 02267 if (res == FR_OK) { 02268 if (!dir) /* Current dir itself */ 02269 res = FR_INVALID_NAME; 02270 #if _FS_SHARE 02271 else 02272 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 02273 #endif 02274 } 02275 /* Create or Open a file */ 02276 if (mode & (FA_CREATE_ALWAYS|FA_OPEN_ALWAYS|FA_CREATE_NEW)) { 02277 DWORD dw, cl; 02278 02279 if (res != FR_OK) { /* No file, create new */ 02280 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */ 02281 #if _FS_SHARE 02282 res = enq_lock(dj.fs) ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; 02283 #else 02284 res = dir_register(&dj); 02285 #endif 02286 mode |= FA_CREATE_ALWAYS; /* File is created */ 02287 dir = dj.dir; /* New entry */ 02288 } 02289 else { /* Any object is already existing */ 02290 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */ 02291 res = FR_DENIED; 02292 } else { 02293 if (mode & FA_CREATE_NEW) /* Cannot create as new file */ 02294 res = FR_EXIST; 02295 } 02296 } 02297 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */ 02298 dw = get_fattime(); /* Created time */ 02299 ST_DWORD(dir+DIR_CrtTime, dw); 02300 dir[DIR_Attr] = 0; /* Reset attribute */ 02301 ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */ 02302 cl = LD_CLUST(dir); /* Get start cluster */ 02303 ST_CLUST(dir, 0); /* cluster = 0 */ 02304 dj.fs->wflag = 1; 02305 if (cl) { /* Remove the cluster chain if exist */ 02306 dw = dj.fs->winsect; 02307 res = remove_chain(dj.fs, cl); 02308 if (res == FR_OK) { 02309 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */ 02310 res = move_window(dj.fs, dw); 02311 } 02312 } 02313 } 02314 } 02315 else { /* Open an existing file */ 02316 if (res == FR_OK) { /* Follow succeeded */ 02317 if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */ 02318 res = FR_NO_FILE; 02319 } else { 02320 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */ 02321 res = FR_DENIED; 02322 } 02323 } 02324 } 02325 if (res == FR_OK) { 02326 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */ 02327 mode |= FA__WRITTEN; 02328 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */ 02329 fp->dir_ptr = dir; 02330 #if _FS_SHARE 02331 fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 02332 if (!fp->lockid) res = FR_INT_ERR; 02333 #endif 02334 } 02335 02336 #else /* R/O configuration */ 02337 if (res == FR_OK) { /* Follow succeeded */ 02338 if (!dir) { /* Current dir itself */ 02339 res = FR_INVALID_NAME; 02340 } else { 02341 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */ 02342 res = FR_NO_FILE; 02343 } 02344 } 02345 #endif 02346 FREE_BUF(); 02347 02348 if (res == FR_OK) { 02349 fp->flag = mode; /* File access mode */ 02350 fp->sclust = LD_CLUST(dir); /* File start cluster */ 02351 fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */ 02352 fp->fptr = 0; /* File pointer */ 02353 fp->dsect = 0; 02354 #if _USE_FASTSEEK 02355 fp->cltbl = 0; /* Normal seek mode */ 02356 #endif 02357 fp->fs = dj.fs; fp->id = dj.fs->id; /* Validate file object */ 02358 } 02359 02360 LEAVE_FF(dj.fs, res); 02361 } 02362 02363 02364 02365 02366 /*-----------------------------------------------------------------------*/ 02367 /* Read File */ 02368 /*-----------------------------------------------------------------------*/ 02369 02370 FRESULT f_read ( 02371 FIL_t *fp, /* Pointer to the file object */ 02372 void *buff, /* Pointer to data buffer */ 02373 UINT btr, /* Number of bytes to read */ 02374 UINT *br /* Pointer to number of bytes read */ 02375 ) 02376 { 02377 FRESULT res; 02378 DWORD clst, sect, remain; 02379 UINT rcnt, cc; 02380 BYTE csect, *rbuff = (BYTE*)buff; 02381 02382 02383 *br = 0; /* Initialize byte counter */ 02384 02385 res = validate(fp->fs, fp->id); /* Check validity */ 02386 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02387 if (fp->flag & FA__ERROR) /* Aborted file? */ 02388 LEAVE_FF(fp->fs, FR_INT_ERR); 02389 if (!(fp->flag & FA_READ)) /* Check access mode */ 02390 LEAVE_FF(fp->fs, FR_DENIED); 02391 remain = fp->fsize - fp->fptr; 02392 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 02393 02394 for ( ; btr; /* Repeat until all data read */ 02395 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { 02396 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 02397 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 02398 if (!csect) { /* On the cluster boundary? */ 02399 if (fp->fptr == 0) { /* On the top of the file? */ 02400 clst = fp->sclust; /* Follow from the origin */ 02401 } else { /* Middle or end of the file */ 02402 #if _USE_FASTSEEK 02403 if (fp->cltbl) 02404 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 02405 else 02406 #endif 02407 clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */ 02408 } 02409 if (clst < 2) ABORT(fp->fs, FR_INT_ERR); 02410 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02411 fp->clust = clst; /* Update current cluster */ 02412 } 02413 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ 02414 if (!sect) ABORT(fp->fs, FR_INT_ERR); 02415 sect += csect; 02416 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */ 02417 if (cc) { /* Read maximum contiguous sectors directly */ 02418 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 02419 cc = fp->fs->csize - csect; 02420 if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK) 02421 ABORT(fp->fs, FR_DISK_ERR); 02422 #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ 02423 #if _FS_TINY 02424 if (fp->fs->wflag && fp->fs->winsect - sect < cc) 02425 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs)); 02426 #else 02427 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) 02428 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs)); 02429 #endif 02430 #endif 02431 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 02432 continue; 02433 } 02434 #if !_FS_TINY 02435 if (fp->dsect != sect) { /* Load data sector if not in cache */ 02436 #if !_FS_READONLY 02437 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 02438 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02439 ABORT(fp->fs, FR_DISK_ERR); 02440 fp->flag &= ~FA__DIRTY; 02441 } 02442 #endif 02443 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */ 02444 ABORT(fp->fs, FR_DISK_ERR); 02445 } 02446 #endif 02447 fp->dsect = sect; 02448 } 02449 rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */ 02450 if (rcnt > btr) rcnt = btr; 02451 #if _FS_TINY 02452 if (move_window(fp->fs, fp->dsect)) /* Move sector window */ 02453 ABORT(fp->fs, FR_DISK_ERR); 02454 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 02455 #else 02456 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 02457 #endif 02458 } 02459 02460 LEAVE_FF(fp->fs, FR_OK); 02461 } 02462 02463 02464 02465 02466 #if !_FS_READONLY 02467 /*-----------------------------------------------------------------------*/ 02468 /* Write File */ 02469 /*-----------------------------------------------------------------------*/ 02470 02471 FRESULT f_write ( 02472 FIL_t *fp, /* Pointer to the file object */ 02473 const void *buff, /* Pointer to the data to be written */ 02474 UINT btw, /* Number of bytes to write */ 02475 UINT *bw /* Pointer to number of bytes written */ 02476 ) 02477 { 02478 FRESULT res; 02479 DWORD clst, sect; 02480 UINT wcnt, cc; 02481 const BYTE *wbuff = (BYTE*)buff; 02482 BYTE csect; 02483 02484 02485 *bw = 0; /* Initialize byte counter */ 02486 02487 res = validate(fp->fs, fp->id); /* Check validity */ 02488 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02489 if (fp->flag & FA__ERROR) /* Aborted file? */ 02490 LEAVE_FF(fp->fs, FR_INT_ERR); 02491 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 02492 LEAVE_FF(fp->fs, FR_DENIED); 02493 if ((DWORD)(fp->fsize + btw) < fp->fsize) btw = 0; /* File size cannot reach 4GB */ 02494 02495 for ( ; btw; /* Repeat until all data written */ 02496 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) { 02497 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 02498 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 02499 if (!csect) { /* On the cluster boundary? */ 02500 if (fp->fptr == 0) { /* On the top of the file? */ 02501 clst = fp->sclust; /* Follow from the origin */ 02502 if (clst == 0) /* When no cluster is allocated, */ 02503 fp->sclust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */ 02504 } else { /* Middle or end of the file */ 02505 #if _USE_FASTSEEK 02506 if (fp->cltbl) 02507 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 02508 else 02509 #endif 02510 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */ 02511 } 02512 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ 02513 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 02514 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02515 fp->clust = clst; /* Update current cluster */ 02516 } 02517 #if _FS_TINY 02518 if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write-back sector cache */ 02519 ABORT(fp->fs, FR_DISK_ERR); 02520 #else 02521 if (fp->flag & FA__DIRTY) { /* Write-back sector cache */ 02522 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02523 ABORT(fp->fs, FR_DISK_ERR); 02524 fp->flag &= ~FA__DIRTY; 02525 } 02526 #endif 02527 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ 02528 if (!sect) ABORT(fp->fs, FR_INT_ERR); 02529 sect += csect; 02530 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */ 02531 if (cc) { /* Write maximum contiguous sectors directly */ 02532 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 02533 cc = fp->fs->csize - csect; 02534 if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK) 02535 ABORT(fp->fs, FR_DISK_ERR); 02536 #if _FS_TINY 02537 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 02538 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs)); 02539 fp->fs->wflag = 0; 02540 } 02541 #else 02542 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 02543 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs)); 02544 fp->flag &= ~FA__DIRTY; 02545 } 02546 #endif 02547 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 02548 continue; 02549 } 02550 #if _FS_TINY 02551 if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */ 02552 if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR); 02553 fp->fs->winsect = sect; 02554 } 02555 #else 02556 if (fp->dsect != sect) { /* Fill sector cache with file data */ 02557 if (fp->fptr < fp->fsize && 02558 disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) 02559 ABORT(fp->fs, FR_DISK_ERR); 02560 } 02561 #endif 02562 fp->dsect = sect; 02563 } 02564 wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Put partial sector into file I/O buffer */ 02565 if (wcnt > btw) wcnt = btw; 02566 #if _FS_TINY 02567 if (move_window(fp->fs, fp->dsect)) /* Move sector window */ 02568 ABORT(fp->fs, FR_DISK_ERR); 02569 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 02570 fp->fs->wflag = 1; 02571 #else 02572 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 02573 fp->flag |= FA__DIRTY; 02574 #endif 02575 } 02576 02577 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */ 02578 fp->flag |= FA__WRITTEN; /* Set file change flag */ 02579 02580 LEAVE_FF(fp->fs, FR_OK); 02581 } 02582 02583 02584 02585 02586 /*-----------------------------------------------------------------------*/ 02587 /* Synchronize the File Object */ 02588 /*-----------------------------------------------------------------------*/ 02589 02590 FRESULT f_sync ( 02591 FIL_t *fp /* Pointer to the file object */ 02592 ) 02593 { 02594 FRESULT res; 02595 DWORD tim; 02596 BYTE *dir; 02597 02598 02599 res = validate(fp->fs, fp->id); /* Check validity of the object */ 02600 if (res == FR_OK) { 02601 if (fp->flag & FA__WRITTEN) { /* Has the file been written? */ 02602 #if !_FS_TINY /* Write-back dirty buffer */ 02603 if (fp->flag & FA__DIRTY) { 02604 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02605 LEAVE_FF(fp->fs, FR_DISK_ERR); 02606 fp->flag &= ~FA__DIRTY; 02607 } 02608 #endif 02609 /* Update the directory entry */ 02610 res = move_window(fp->fs, fp->dir_sect); 02611 if (res == FR_OK) { 02612 dir = fp->dir_ptr; 02613 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ 02614 ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */ 02615 ST_CLUST(dir, fp->sclust); /* Update start cluster */ 02616 tim = get_fattime(); /* Update updated time */ 02617 ST_DWORD(dir+DIR_WrtTime, tim); 02618 fp->flag &= ~FA__WRITTEN; 02619 fp->fs->wflag = 1; 02620 res = sync(fp->fs); 02621 } 02622 } 02623 } 02624 02625 LEAVE_FF(fp->fs, res); 02626 } 02627 02628 #endif /* !_FS_READONLY */ 02629 02630 02631 02632 02633 /*-----------------------------------------------------------------------*/ 02634 /* Close File */ 02635 /*-----------------------------------------------------------------------*/ 02636 02637 FRESULT f_close ( 02638 FIL_t *fp /* Pointer to the file object to be closed */ 02639 ) 02640 { 02641 FRESULT res; 02642 02643 #if _FS_READONLY 02644 FATFS *fs = fp->fs; 02645 res = validate(fs, fp->id); 02646 if (res == FR_OK) fp->fs = 0; /* Discard file object */ 02647 LEAVE_FF(fs, res); 02648 02649 #else 02650 res = f_sync(fp); /* Flush cached data */ 02651 #if _FS_SHARE 02652 if (res == FR_OK) { /* Decrement open counter */ 02653 #if _FS_REENTRANT 02654 res = validate(fp->fs, fp->id); 02655 if (res == FR_OK) { 02656 res = dec_lock(fp->lockid); 02657 unlock_fs(fp->fs, FR_OK); 02658 } 02659 #else 02660 res = dec_lock(fp->lockid); 02661 #endif 02662 } 02663 #endif 02664 if (res == FR_OK) fp->fs = 0; /* Discard file object */ 02665 return res; 02666 #endif 02667 } 02668 02669 02670 02671 02672 /*-----------------------------------------------------------------------*/ 02673 /* Current Drive/Directory Handlings */ 02674 /*-----------------------------------------------------------------------*/ 02675 02676 #if _FS_RPATH >= 1 02677 02678 FRESULT f_chdrive ( 02679 BYTE drv /* Drive number */ 02680 ) 02681 { 02682 if (drv >= _VOLUMES) return FR_INVALID_DRIVE; 02683 02684 CurrVol = drv; 02685 02686 return FR_OK; 02687 } 02688 02689 02690 02691 FRESULT f_chdir ( 02692 const TCHAR *path /* Pointer to the directory path */ 02693 ) 02694 { 02695 FRESULT res; 02696 DIR_t dj; 02697 DEF_NAMEBUF; 02698 02699 02700 res = chk_mounted(&path, &dj.fs, 0); 02701 if (res == FR_OK) { 02702 INIT_BUF(dj); 02703 res = follow_path(&dj, path); /* Follow the path */ 02704 FREE_BUF(); 02705 if (res == FR_OK) { /* Follow completed */ 02706 if (!dj.dir) { 02707 dj.fs->cdir = dj.sclust; /* Start directory itself */ 02708 } else { 02709 if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */ 02710 dj.fs->cdir = LD_CLUST(dj.dir); 02711 else 02712 res = FR_NO_PATH; /* Reached but a file */ 02713 } 02714 } 02715 if (res == FR_NO_FILE) res = FR_NO_PATH; 02716 } 02717 02718 LEAVE_FF(dj.fs, res); 02719 } 02720 02721 02722 #if _FS_RPATH >= 2 02723 FRESULT f_getcwd ( 02724 TCHAR *path, /* Pointer to the directory path */ 02725 UINT sz_path /* Size of path */ 02726 ) 02727 { 02728 FRESULT res; 02729 DIR_t dj; 02730 UINT i, n; 02731 DWORD ccl; 02732 TCHAR *tp; 02733 FILINFO fno; 02734 DEF_NAMEBUF; 02735 02736 02737 *path = 0; 02738 res = chk_mounted((const TCHAR**)&path, &dj.fs, 0); /* Get current volume */ 02739 if (res == FR_OK) { 02740 INIT_BUF(dj); 02741 i = sz_path; /* Bottom of buffer (dir stack base) */ 02742 dj.sclust = dj.fs->cdir; /* Start to follow upper dir from current dir */ 02743 while ((ccl = dj.sclust) != 0) { /* Repeat while current dir is a sub-dir */ 02744 res = dir_sdi(&dj, 1); /* Get parent dir */ 02745 if (res != FR_OK) break; 02746 res = dir_read(&dj); 02747 if (res != FR_OK) break; 02748 dj.sclust = LD_CLUST(dj.dir); /* Goto parent dir */ 02749 res = dir_sdi(&dj, 0); 02750 if (res != FR_OK) break; 02751 do { /* Find the entry links to the child dir */ 02752 res = dir_read(&dj); 02753 if (res != FR_OK) break; 02754 if (ccl == LD_CLUST(dj.dir)) break; /* Found the entry */ 02755 res = dir_next(&dj, 0); 02756 } while (res == FR_OK); 02757 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ 02758 if (res != FR_OK) break; 02759 #if _USE_LFN 02760 fno.lfname = path; 02761 fno.lfsize = i; 02762 #endif 02763 get_fileinfo(&dj, &fno); /* Get the dir name and push it to the buffer */ 02764 tp = fno.fname; 02765 if (_USE_LFN && *path) tp = path; 02766 for (n = 0; tp[n]; n++) ; 02767 if (i < n + 3) { 02768 res = FR_NOT_ENOUGH_CORE; break; 02769 } 02770 while (n) path[--i] = tp[--n]; 02771 path[--i] = '/'; 02772 } 02773 tp = path; 02774 if (res == FR_OK) { 02775 *tp++ = '0' + CurrVol; /* Put drive number */ 02776 *tp++ = ':'; 02777 if (i == sz_path) { /* Root-dir */ 02778 *tp++ = '/'; 02779 } else { /* Sub-dir */ 02780 do /* Add stacked path str */ 02781 *tp++ = path[i++]; 02782 while (i < sz_path); 02783 } 02784 } 02785 *tp = 0; 02786 FREE_BUF(); 02787 } 02788 02789 LEAVE_FF(dj.fs, res); 02790 } 02791 #endif /* _FS_RPATH >= 2 */ 02792 #endif /* _FS_RPATH >= 1 */ 02793 02794 02795 02796 #if _FS_MINIMIZE <= 2 02797 /*-----------------------------------------------------------------------*/ 02798 /* Seek File R/W Pointer */ 02799 /*-----------------------------------------------------------------------*/ 02800 02801 FRESULT f_lseek ( 02802 FIL_t *fp, /* Pointer to the file object */ 02803 DWORD ofs /* File pointer from top of file */ 02804 ) 02805 { 02806 FRESULT res; 02807 02808 02809 res = validate(fp->fs, fp->id); /* Check validity of the object */ 02810 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02811 if (fp->flag & FA__ERROR) /* Check abort flag */ 02812 LEAVE_FF(fp->fs, FR_INT_ERR); 02813 02814 #if _USE_FASTSEEK 02815 if (fp->cltbl) { /* Fast seek */ 02816 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl; 02817 02818 if (ofs == CREATE_LINKMAP) { /* Create CLMT */ 02819 tbl = fp->cltbl; 02820 tlen = *tbl++; ulen = 2; /* Given table size and required table size */ 02821 cl = fp->sclust; /* Top of the chain */ 02822 if (cl) { 02823 do { 02824 /* Get a fragment */ 02825 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */ 02826 do { 02827 pcl = cl; ncl++; 02828 cl = get_fat(fp->fs, cl); 02829 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR); 02830 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02831 } while (cl == pcl + 1); 02832 if (ulen <= tlen) { /* Store the length and top of the fragment */ 02833 *tbl++ = ncl; *tbl++ = tcl; 02834 } 02835 } while (cl < fp->fs->n_fatent); /* Repeat until end of chain */ 02836 } 02837 *fp->cltbl = ulen; /* Number of items used */ 02838 if (ulen <= tlen) 02839 *tbl = 0; /* Terminate table */ 02840 else 02841 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */ 02842 02843 } else { /* Fast seek */ 02844 if (ofs > fp->fsize) /* Clip offset at the file size */ 02845 ofs = fp->fsize; 02846 fp->fptr = ofs; /* Set file pointer */ 02847 if (ofs) { 02848 fp->clust = clmt_clust(fp, ofs - 1); 02849 dsc = clust2sect(fp->fs, fp->clust); 02850 if (!dsc) ABORT(fp->fs, FR_INT_ERR); 02851 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1); 02852 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */ 02853 #if !_FS_TINY 02854 #if !_FS_READONLY 02855 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 02856 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02857 ABORT(fp->fs, FR_DISK_ERR); 02858 fp->flag &= ~FA__DIRTY; 02859 } 02860 #endif 02861 if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */ 02862 ABORT(fp->fs, FR_DISK_ERR); 02863 #endif 02864 fp->dsect = dsc; 02865 } 02866 } 02867 } 02868 } else 02869 #endif 02870 02871 /* Normal Seek */ 02872 { 02873 DWORD clst, bcs, nsect, ifptr; 02874 02875 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */ 02876 #if !_FS_READONLY 02877 && !(fp->flag & FA_WRITE) 02878 #endif 02879 ) ofs = fp->fsize; 02880 02881 ifptr = fp->fptr; 02882 fp->fptr = nsect = 0; 02883 if (ofs) { 02884 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */ 02885 if (ifptr > 0 && 02886 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ 02887 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ 02888 ofs -= fp->fptr; 02889 clst = fp->clust; 02890 } else { /* When seek to back cluster, */ 02891 clst = fp->sclust; /* start from the first cluster */ 02892 #if !_FS_READONLY 02893 if (clst == 0) { /* If no cluster chain, create a new chain */ 02894 clst = create_chain(fp->fs, 0); 02895 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 02896 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02897 fp->sclust = clst; 02898 } 02899 #endif 02900 fp->clust = clst; 02901 } 02902 if (clst != 0) { 02903 while (ofs > bcs) { /* Cluster following loop */ 02904 #if !_FS_READONLY 02905 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ 02906 clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */ 02907 if (clst == 0) { /* When disk gets full, clip file size */ 02908 ofs = bcs; break; 02909 } 02910 } else 02911 #endif 02912 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */ 02913 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02914 if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR); 02915 fp->clust = clst; 02916 fp->fptr += bcs; 02917 ofs -= bcs; 02918 } 02919 fp->fptr += ofs; 02920 if (ofs % SS(fp->fs)) { 02921 nsect = clust2sect(fp->fs, clst); /* Current sector */ 02922 if (!nsect) ABORT(fp->fs, FR_INT_ERR); 02923 nsect += ofs / SS(fp->fs); 02924 } 02925 } 02926 } 02927 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */ 02928 #if !_FS_TINY 02929 #if !_FS_READONLY 02930 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 02931 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02932 ABORT(fp->fs, FR_DISK_ERR); 02933 fp->flag &= ~FA__DIRTY; 02934 } 02935 #endif 02936 if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */ 02937 ABORT(fp->fs, FR_DISK_ERR); 02938 #endif 02939 fp->dsect = nsect; 02940 } 02941 #if !_FS_READONLY 02942 if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */ 02943 fp->fsize = fp->fptr; 02944 fp->flag |= FA__WRITTEN; 02945 } 02946 #endif 02947 } 02948 02949 LEAVE_FF(fp->fs, res); 02950 } 02951 02952 02953 02954 #if _FS_MINIMIZE <= 1 02955 /*-----------------------------------------------------------------------*/ 02956 /* Create a Directroy Object */ 02957 /*-----------------------------------------------------------------------*/ 02958 02959 FRESULT f_opendir ( 02960 DIR_t *dj, /* Pointer to directory object to create */ 02961 const TCHAR *path /* Pointer to the directory path */ 02962 ) 02963 { 02964 FRESULT res; 02965 DEF_NAMEBUF; 02966 02967 02968 res = chk_mounted(&path, &dj->fs, 0); 02969 if (res == FR_OK) { 02970 INIT_BUF(*dj); 02971 res = follow_path(dj, path); /* Follow the path to the directory */ 02972 FREE_BUF(); 02973 if (res == FR_OK) { /* Follow completed */ 02974 if (dj->dir) { /* It is not the root dir */ 02975 if (dj->dir[DIR_Attr] & AM_DIR) { /* The object is a directory */ 02976 dj->sclust = LD_CLUST(dj->dir); 02977 } else { /* The object is not a directory */ 02978 res = FR_NO_PATH; 02979 } 02980 } 02981 if (res == FR_OK) { 02982 dj->id = dj->fs->id; 02983 res = dir_sdi(dj, 0); /* Rewind dir */ 02984 } 02985 } 02986 if (res == FR_NO_FILE) res = FR_NO_PATH; 02987 } 02988 02989 LEAVE_FF(dj->fs, res); 02990 } 02991 02992 02993 02994 02995 /*-----------------------------------------------------------------------*/ 02996 /* Read Directory Entry in Sequense */ 02997 /*-----------------------------------------------------------------------*/ 02998 02999 FRESULT f_readdir ( 03000 DIR_t *dj, /* Pointer to the open directory object */ 03001 FILINFO *fno /* Pointer to file information to return */ 03002 ) 03003 { 03004 FRESULT res; 03005 DEF_NAMEBUF; 03006 03007 res = validate(dj->fs, dj->id); /* Check validity of the object */ 03008 if (res == FR_OK) { 03009 if (!fno) { 03010 res = dir_sdi(dj, 0); /* Rewind the directory object */ 03011 } else { 03012 INIT_BUF(*dj); 03013 res = dir_read(dj); /* Read an directory item */ 03014 if (res == FR_NO_FILE) { /* Reached end of dir */ 03015 dj->sect = 0; 03016 res = FR_OK; 03017 } 03018 if (res == FR_OK) { /* A valid entry is found */ 03019 get_fileinfo(dj, fno); /* Get the object information */ 03020 res = dir_next(dj, 0); /* Increment index for next */ 03021 if (res == FR_NO_FILE) { 03022 dj->sect = 0; 03023 res = FR_OK; 03024 } 03025 } 03026 FREE_BUF(); 03027 } 03028 } 03029 03030 LEAVE_FF(dj->fs, res); 03031 } 03032 03033 03034 03035 #if _FS_MINIMIZE == 0 03036 /*-----------------------------------------------------------------------*/ 03037 /* Get File Status */ 03038 /*-----------------------------------------------------------------------*/ 03039 03040 FRESULT f_stat ( 03041 const TCHAR *path, /* Pointer to the file path */ 03042 FILINFO *fno /* Pointer to file information to return */ 03043 ) 03044 { 03045 FRESULT res; 03046 DIR_t dj; 03047 DEF_NAMEBUF; 03048 03049 03050 res = chk_mounted(&path, &dj.fs, 0); 03051 if (res == FR_OK) { 03052 INIT_BUF(dj); 03053 res = follow_path(&dj, path); /* Follow the file path */ 03054 if (res == FR_OK) { /* Follow completed */ 03055 if (dj.dir) /* Found an object */ 03056 get_fileinfo(&dj, fno); 03057 else /* It is root dir */ 03058 res = FR_INVALID_NAME; 03059 } 03060 FREE_BUF(); 03061 } 03062 03063 LEAVE_FF(dj.fs, res); 03064 } 03065 03066 03067 03068 #if !_FS_READONLY 03069 /*-----------------------------------------------------------------------*/ 03070 /* Get Number of Free Clusters */ 03071 /*-----------------------------------------------------------------------*/ 03072 03073 FRESULT f_getfree ( 03074 const TCHAR *path, /* Pointer to the logical drive number (root dir) */ 03075 DWORD *nclst, /* Pointer to the variable to return number of free clusters */ 03076 FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */ 03077 ) 03078 { 03079 FRESULT res; 03080 DWORD n, clst, sect, stat; 03081 UINT i; 03082 BYTE fat, *p; 03083 03084 03085 /* Get drive number */ 03086 res = chk_mounted(&path, fatfs, 0); 03087 if (res == FR_OK) { 03088 /* If free_clust is valid, return it without full cluster scan */ 03089 if ((*fatfs)->free_clust <= (*fatfs)->n_fatent - 2) { 03090 *nclst = (*fatfs)->free_clust; 03091 } else { 03092 /* Get number of free clusters */ 03093 fat = (*fatfs)->fs_type; 03094 n = 0; 03095 if (fat == FS_FAT12) { 03096 clst = 2; 03097 do { 03098 stat = get_fat(*fatfs, clst); 03099 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 03100 if (stat == 1) { res = FR_INT_ERR; break; } 03101 if (stat == 0) n++; 03102 } while (++clst < (*fatfs)->n_fatent); 03103 } else { 03104 clst = (*fatfs)->n_fatent; 03105 sect = (*fatfs)->fatbase; 03106 i = 0; p = 0; 03107 do { 03108 if (!i) { 03109 res = move_window(*fatfs, sect++); 03110 if (res != FR_OK) break; 03111 p = (*fatfs)->win; 03112 i = SS(*fatfs); 03113 } 03114 if (fat == FS_FAT16) { 03115 if (LD_WORD(p) == 0) n++; 03116 p += 2; i -= 2; 03117 } else { 03118 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++; 03119 p += 4; i -= 4; 03120 } 03121 } while (--clst); 03122 } 03123 (*fatfs)->free_clust = n; 03124 if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1; 03125 *nclst = n; 03126 } 03127 } 03128 LEAVE_FF(*fatfs, res); 03129 } 03130 03131 03132 03133 03134 /*-----------------------------------------------------------------------*/ 03135 /* Truncate File */ 03136 /*-----------------------------------------------------------------------*/ 03137 03138 FRESULT f_truncate ( 03139 FIL_t *fp /* Pointer to the file object */ 03140 ) 03141 { 03142 FRESULT res; 03143 DWORD ncl; 03144 03145 03146 res = validate(fp->fs, fp->id); /* Check validity of the object */ 03147 if (res == FR_OK) { 03148 if (fp->flag & FA__ERROR) { /* Check abort flag */ 03149 res = FR_INT_ERR; 03150 } else { 03151 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 03152 res = FR_DENIED; 03153 } 03154 } 03155 if (res == FR_OK) { 03156 if (fp->fsize > fp->fptr) { 03157 fp->fsize = fp->fptr; /* Set file size to current R/W point */ 03158 fp->flag |= FA__WRITTEN; 03159 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ 03160 res = remove_chain(fp->fs, fp->sclust); 03161 fp->sclust = 0; 03162 } else { /* When truncate a part of the file, remove remaining clusters */ 03163 ncl = get_fat(fp->fs, fp->clust); 03164 res = FR_OK; 03165 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; 03166 if (ncl == 1) res = FR_INT_ERR; 03167 if (res == FR_OK && ncl < fp->fs->n_fatent) { 03168 res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF); 03169 if (res == FR_OK) res = remove_chain(fp->fs, ncl); 03170 } 03171 } 03172 } 03173 if (res != FR_OK) fp->flag |= FA__ERROR; 03174 } 03175 03176 LEAVE_FF(fp->fs, res); 03177 } 03178 03179 03180 03181 03182 /*-----------------------------------------------------------------------*/ 03183 /* Delete a File or Directory */ 03184 /*-----------------------------------------------------------------------*/ 03185 03186 FRESULT f_unlink ( 03187 const TCHAR *path /* Pointer to the file or directory path */ 03188 ) 03189 { 03190 FRESULT res; 03191 DIR_t dj, sdj; 03192 BYTE *dir; 03193 DWORD dclst; 03194 DEF_NAMEBUF; 03195 03196 03197 res = chk_mounted(&path, &dj.fs, 1); 03198 if (res == FR_OK) { 03199 INIT_BUF(dj); 03200 res = follow_path(&dj, path); /* Follow the file path */ 03201 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 03202 res = FR_INVALID_NAME; /* Cannot remove dot entry */ 03203 #if _FS_SHARE 03204 if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open file */ 03205 #endif 03206 if (res == FR_OK) { /* The object is accessible */ 03207 dir = dj.dir; 03208 if (!dir) { 03209 res = FR_INVALID_NAME; /* Cannot remove the start directory */ 03210 } else { 03211 if (dir[DIR_Attr] & AM_RDO) 03212 res = FR_DENIED; /* Cannot remove R/O object */ 03213 } 03214 dclst = LD_CLUST(dir); 03215 if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */ 03216 if (dclst < 2) { 03217 res = FR_INT_ERR; 03218 } else { 03219 mem_cpy(&sdj, &dj, sizeof(DIR_t)); /* Check if the sub-dir is empty or not */ 03220 sdj.sclust = dclst; 03221 res = dir_sdi(&sdj, 2); /* Exclude dot entries */ 03222 if (res == FR_OK) { 03223 res = dir_read(&sdj); 03224 if (res == FR_OK /* Not empty dir */ 03225 #if _FS_RPATH 03226 || dclst == sdj.fs->cdir /* Current dir */ 03227 #endif 03228 ) res = FR_DENIED; 03229 if (res == FR_NO_FILE) res = FR_OK; /* Empty */ 03230 } 03231 } 03232 } 03233 if (res == FR_OK) { 03234 res = dir_remove(&dj); /* Remove the directory entry */ 03235 if (res == FR_OK) { 03236 if (dclst) /* Remove the cluster chain if exist */ 03237 res = remove_chain(dj.fs, dclst); 03238 if (res == FR_OK) res = sync(dj.fs); 03239 } 03240 } 03241 } 03242 FREE_BUF(); 03243 } 03244 LEAVE_FF(dj.fs, res); 03245 } 03246 03247 03248 03249 03250 /*-----------------------------------------------------------------------*/ 03251 /* Create a Directory */ 03252 /*-----------------------------------------------------------------------*/ 03253 03254 FRESULT f_mkdir ( 03255 const TCHAR *path /* Pointer to the directory path */ 03256 ) 03257 { 03258 FRESULT res; 03259 DIR_t dj; 03260 BYTE *dir, n; 03261 DWORD dsc, dcl, pcl, tim = get_fattime(); 03262 DEF_NAMEBUF; 03263 03264 03265 res = chk_mounted(&path, &dj.fs, 1); 03266 if (res == FR_OK) { 03267 INIT_BUF(dj); 03268 res = follow_path(&dj, path); /* Follow the file path */ 03269 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */ 03270 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT)) 03271 res = FR_INVALID_NAME; 03272 if (res == FR_NO_FILE) { /* Can create a new directory */ 03273 dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */ 03274 res = FR_OK; 03275 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */ 03276 if (dcl == 1) res = FR_INT_ERR; 03277 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; 03278 if (res == FR_OK) /* Flush FAT */ 03279 res = move_window(dj.fs, 0); 03280 if (res == FR_OK) { /* Initialize the new directory table */ 03281 dsc = clust2sect(dj.fs, dcl); 03282 dir = dj.fs->win; 03283 mem_set(dir, 0, SS(dj.fs)); 03284 mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */ 03285 dir[DIR_Name] = '.'; 03286 dir[DIR_Attr] = AM_DIR; 03287 ST_DWORD(dir+DIR_WrtTime, tim); 03288 ST_CLUST(dir, dcl); 03289 mem_cpy(dir+SZ_DIR, dir, SZ_DIR); /* Create ".." entry */ 03290 dir[33] = '.'; pcl = dj.sclust; 03291 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase) 03292 pcl = 0; 03293 ST_CLUST(dir+SZ_DIR, pcl); 03294 for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */ 03295 dj.fs->winsect = dsc++; 03296 dj.fs->wflag = 1; 03297 res = move_window(dj.fs, 0); 03298 if (res != FR_OK) break; 03299 mem_set(dir, 0, SS(dj.fs)); 03300 } 03301 } 03302 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */ 03303 if (res != FR_OK) { 03304 remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */ 03305 } else { 03306 dir = dj.dir; 03307 dir[DIR_Attr] = AM_DIR; /* Attribute */ 03308 ST_DWORD(dir+DIR_WrtTime, tim); /* Created time */ 03309 ST_CLUST(dir, dcl); /* Table start cluster */ 03310 dj.fs->wflag = 1; 03311 res = sync(dj.fs); 03312 } 03313 } 03314 FREE_BUF(); 03315 } 03316 03317 LEAVE_FF(dj.fs, res); 03318 } 03319 03320 03321 03322 03323 /*-----------------------------------------------------------------------*/ 03324 /* Change Attribute */ 03325 /*-----------------------------------------------------------------------*/ 03326 03327 FRESULT f_chmod ( 03328 const TCHAR *path, /* Pointer to the file path */ 03329 BYTE value, /* Attribute bits */ 03330 BYTE mask /* Attribute mask to change */ 03331 ) 03332 { 03333 FRESULT res; 03334 DIR_t dj; 03335 BYTE *dir; 03336 DEF_NAMEBUF; 03337 03338 03339 res = chk_mounted(&path, &dj.fs, 1); 03340 if (res == FR_OK) { 03341 INIT_BUF(dj); 03342 res = follow_path(&dj, path); /* Follow the file path */ 03343 FREE_BUF(); 03344 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 03345 res = FR_INVALID_NAME; 03346 if (res == FR_OK) { 03347 dir = dj.dir; 03348 if (!dir) { /* Is it a root directory? */ 03349 res = FR_INVALID_NAME; 03350 } else { /* File or sub directory */ 03351 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ 03352 dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 03353 dj.fs->wflag = 1; 03354 res = sync(dj.fs); 03355 } 03356 } 03357 } 03358 03359 LEAVE_FF(dj.fs, res); 03360 } 03361 03362 03363 03364 03365 /*-----------------------------------------------------------------------*/ 03366 /* Change Timestamp */ 03367 /*-----------------------------------------------------------------------*/ 03368 03369 FRESULT f_utime ( 03370 const TCHAR *path, /* Pointer to the file/directory name */ 03371 const FILINFO *fno /* Pointer to the time stamp to be set */ 03372 ) 03373 { 03374 FRESULT res; 03375 DIR_t dj; 03376 BYTE *dir; 03377 DEF_NAMEBUF; 03378 03379 03380 res = chk_mounted(&path, &dj.fs, 1); 03381 if (res == FR_OK) { 03382 INIT_BUF(dj); 03383 res = follow_path(&dj, path); /* Follow the file path */ 03384 FREE_BUF(); 03385 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 03386 res = FR_INVALID_NAME; 03387 if (res == FR_OK) { 03388 dir = dj.dir; 03389 if (!dir) { /* Root directory */ 03390 res = FR_INVALID_NAME; 03391 } else { /* File or sub-directory */ 03392 ST_WORD(dir+DIR_WrtTime, fno->ftime); 03393 ST_WORD(dir+DIR_WrtDate, fno->fdate); 03394 dj.fs->wflag = 1; 03395 res = sync(dj.fs); 03396 } 03397 } 03398 } 03399 03400 LEAVE_FF(dj.fs, res); 03401 } 03402 03403 03404 03405 03406 /*-----------------------------------------------------------------------*/ 03407 /* Rename File/Directory */ 03408 /*-----------------------------------------------------------------------*/ 03409 03410 FRESULT f_rename ( 03411 const TCHAR *path_old, /* Pointer to the old name */ 03412 const TCHAR *path_new /* Pointer to the new name */ 03413 ) 03414 { 03415 FRESULT res; 03416 DIR_t djo, djn; 03417 BYTE buf[21], *dir; 03418 DWORD dw; 03419 DEF_NAMEBUF; 03420 03421 03422 res = chk_mounted(&path_old, &djo.fs, 1); 03423 if (res == FR_OK) { 03424 djn.fs = djo.fs; 03425 INIT_BUF(djo); 03426 res = follow_path(&djo, path_old); /* Check old object */ 03427 if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT)) 03428 res = FR_INVALID_NAME; 03429 #if _FS_SHARE 03430 if (res == FR_OK) res = chk_lock(&djo, 2); 03431 #endif 03432 if (res == FR_OK) { /* Old object is found */ 03433 if (!djo.dir) { /* Is root dir? */ 03434 res = FR_NO_FILE; 03435 } else { 03436 mem_cpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except for name */ 03437 mem_cpy(&djn, &djo, sizeof(DIR_t)); /* Check new object */ 03438 res = follow_path(&djn, path_new); 03439 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */ 03440 if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */ 03441 /* Start critical section that any interruption or error can cause cross-link */ 03442 res = dir_register(&djn); /* Register the new entry */ 03443 if (res == FR_OK) { 03444 dir = djn.dir; /* Copy object information except for name */ 03445 mem_cpy(dir+13, buf+2, 19); 03446 dir[DIR_Attr] = buf[0] | AM_ARC; 03447 djo.fs->wflag = 1; 03448 if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) { /* Update .. entry in the directory if needed */ 03449 dw = clust2sect(djn.fs, LD_CLUST(dir)); 03450 if (!dw) { 03451 res = FR_INT_ERR; 03452 } else { 03453 res = move_window(djn.fs, dw); 03454 dir = djn.fs->win+SZ_DIR; /* .. entry */ 03455 if (res == FR_OK && dir[1] == '.') { 03456 dw = (djn.fs->fs_type == FS_FAT32 && djn.sclust == djn.fs->dirbase) ? 0 : djn.sclust; 03457 ST_CLUST(dir, dw); 03458 djn.fs->wflag = 1; 03459 } 03460 } 03461 } 03462 if (res == FR_OK) { 03463 res = dir_remove(&djo); /* Remove old entry */ 03464 if (res == FR_OK) 03465 res = sync(djo.fs); 03466 } 03467 } 03468 /* End critical section */ 03469 } 03470 } 03471 } 03472 FREE_BUF(); 03473 } 03474 LEAVE_FF(djo.fs, res); 03475 } 03476 03477 #endif /* !_FS_READONLY */ 03478 #endif /* _FS_MINIMIZE == 0 */ 03479 #endif /* _FS_MINIMIZE <= 1 */ 03480 #endif /* _FS_MINIMIZE <= 2 */ 03481 03482 03483 03484 /*-----------------------------------------------------------------------*/ 03485 /* Forward data to the stream directly (available on only tiny cfg) */ 03486 /*-----------------------------------------------------------------------*/ 03487 #if _USE_FORWARD && _FS_TINY 03488 03489 FRESULT f_forward ( 03490 FIL_t *fp, /* Pointer to the file object */ 03491 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ 03492 UINT btr, /* Number of bytes to forward */ 03493 UINT *bf /* Pointer to number of bytes forwarded */ 03494 ) 03495 { 03496 FRESULT res; 03497 DWORD remain, clst, sect; 03498 UINT rcnt; 03499 BYTE csect; 03500 03501 03502 *bf = 0; /* Initialize byte counter */ 03503 03504 res = validate(fp->fs, fp->id); /* Check validity of the object */ 03505 if (res != FR_OK) LEAVE_FF(fp->fs, res); 03506 if (fp->flag & FA__ERROR) /* Check error flag */ 03507 LEAVE_FF(fp->fs, FR_INT_ERR); 03508 if (!(fp->flag & FA_READ)) /* Check access mode */ 03509 LEAVE_FF(fp->fs, FR_DENIED); 03510 03511 remain = fp->fsize - fp->fptr; 03512 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 03513 03514 for ( ; btr && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */ 03515 fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) { 03516 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 03517 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 03518 if (!csect) { /* On the cluster boundary? */ 03519 clst = (fp->fptr == 0) ? /* On the top of the file? */ 03520 fp->sclust : get_fat(fp->fs, fp->clust); 03521 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR); 03522 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 03523 fp->clust = clst; /* Update current cluster */ 03524 } 03525 } 03526 sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */ 03527 if (!sect) ABORT(fp->fs, FR_INT_ERR); 03528 sect += csect; 03529 if (move_window(fp->fs, sect)) /* Move sector window */ 03530 ABORT(fp->fs, FR_DISK_ERR); 03531 fp->dsect = sect; 03532 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */ 03533 if (rcnt > btr) rcnt = btr; 03534 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt); 03535 if (!rcnt) ABORT(fp->fs, FR_INT_ERR); 03536 } 03537 03538 LEAVE_FF(fp->fs, FR_OK); 03539 } 03540 #endif /* _USE_FORWARD */ 03541 03542 03543 03544 #if _USE_MKFS && !_FS_READONLY 03545 /*-----------------------------------------------------------------------*/ 03546 /* Create File System on the Drive */ 03547 /*-----------------------------------------------------------------------*/ 03548 #define N_ROOTDIR 512 /* Number of root dir entries for FAT12/16 */ 03549 #define N_FATS 1 /* Number of FAT copies (1 or 2) */ 03550 03551 03552 FRESULT f_mkfs ( 03553 BYTE drv, /* Logical drive number */ 03554 BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */ 03555 UINT au /* Allocation unit size [bytes] */ 03556 ) 03557 { 03558 static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0}; 03559 static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512}; 03560 BYTE fmt, md, *tbl; 03561 DWORD n_clst, vs, n, wsect; 03562 UINT i; 03563 DWORD b_vol, b_fat, b_dir, b_data; /* Offset (LBA) */ 03564 DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */ 03565 FATFS *fs; 03566 DSTATUS stat; 03567 03568 03569 /* Check mounted drive and clear work area */ 03570 if (drv >= _VOLUMES) return FR_INVALID_DRIVE; 03571 fs = FatFs[drv]; 03572 if (!fs) return FR_NOT_ENABLED; 03573 fs->fs_type = 0; 03574 drv = LD2PD(drv); 03575 03576 /* Get disk statics */ 03577 stat = disk_initialize(drv); 03578 if (stat & STA_NOINIT) return FR_NOT_READY; 03579 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 03580 #if _MAX_SS != 512 /* Get disk sector size */ 03581 if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) 03582 return FR_DISK_ERR; 03583 #endif 03584 if (disk_ioctl(drv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128) 03585 return FR_DISK_ERR; 03586 b_vol = (sfd) ? 0 : 63; /* Volume start sector */ 03587 n_vol -= b_vol; 03588 if (au & (au - 1)) au = 0; /* Check validity of the AU size */ 03589 if (!au) { /* AU auto selection */ 03590 vs = n_vol / (2000 / (SS(fs) / 512)); 03591 for (i = 0; vs < vst[i]; i++) ; 03592 au = cst[i]; 03593 } 03594 au /= SS(fs); /* Number of sectors per cluster */ 03595 if (au == 0) au = 1; 03596 if (au > 128) au = 128; 03597 03598 /* Pre-compute number of clusters and FAT syb-type */ 03599 n_clst = n_vol / au; 03600 fmt = FS_FAT12; 03601 if (n_clst >= MIN_FAT16) fmt = FS_FAT16; 03602 if (n_clst >= MIN_FAT32) fmt = FS_FAT32; 03603 03604 /* Determine offset and size of FAT structure */ 03605 if (fmt == FS_FAT32) { 03606 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs); 03607 n_rsv = 32; 03608 n_dir = 0; 03609 } else { 03610 n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4; 03611 n_fat = (n_fat + SS(fs) - 1) / SS(fs); 03612 n_rsv = 1; 03613 n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs); 03614 } 03615 b_fat = b_vol + n_rsv; /* FAT area start sector */ 03616 b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */ 03617 b_data = b_dir + n_dir; /* Data area start sector */ 03618 if (n_vol < b_data + au) return FR_MKFS_ABORTED; /* Too small volume */ 03619 03620 /* Align data start sector to erase block boundary (for flash memory media) */ 03621 if (disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1; 03622 n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */ 03623 n = (n - b_data) / N_FATS; 03624 if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */ 03625 n_rsv += n; 03626 b_fat += n; 03627 } else { /* FAT12/16: Expand FAT size */ 03628 n_fat += n; 03629 } 03630 03631 /* Determine number of clusters and final check of validity of the FAT sub-type */ 03632 n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au; 03633 if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16) 03634 || (fmt == FS_FAT32 && n_clst < MIN_FAT32)) 03635 return FR_MKFS_ABORTED; 03636 03637 /* Create partition table if required */ 03638 if (sfd) { /* No patition table (SFD) */ 03639 md = 0xF0; 03640 } else { /* With patition table (FDISK) */ 03641 DWORD n_disk = b_vol + n_vol; 03642 03643 mem_set(fs->win, 0, SS(fs)); 03644 tbl = fs->win+MBR_Table; 03645 ST_DWORD(tbl, 0x00010180); /* Partition start in CHS */ 03646 if (n_disk < 63UL * 255 * 1024) { /* Partition end in CHS */ 03647 n_disk = n_disk / 63 / 255; 03648 tbl[7] = (BYTE)n_disk; 03649 tbl[6] = (BYTE)((n_disk >> 2) | 63); 03650 } else { 03651 ST_WORD(&tbl[6], 0xFFFF); /* CHS saturated */ 03652 } 03653 tbl[5] = 254; 03654 if (fmt != FS_FAT32) /* System ID */ 03655 tbl[4] = (n_vol < 0x10000) ? 0x04 : 0x06; 03656 else 03657 tbl[4] = 0x0c; 03658 ST_DWORD(tbl+8, 63); /* Partition start in LBA */ 03659 ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */ 03660 ST_WORD(fs->win+BS_55AA, 0xAA55); /* MBR signature */ 03661 if (disk_write(drv, fs->win, 0, 1) != RES_OK) /* Put the MBR into first physical sector */ 03662 return FR_DISK_ERR; 03663 md = 0xF8; 03664 } 03665 03666 /* Create volume boot record */ 03667 tbl = fs->win; /* Clear sector */ 03668 mem_set(tbl, 0, SS(fs)); 03669 mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */ 03670 i = SS(fs); /* Sector size */ 03671 ST_WORD(tbl+BPB_BytsPerSec, i); 03672 tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */ 03673 ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */ 03674 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */ 03675 i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of rootdir entries */ 03676 ST_WORD(tbl+BPB_RootEntCnt, i); 03677 if (n_vol < 0x10000) { /* Number of total sectors */ 03678 ST_WORD(tbl+BPB_TotSec16, n_vol); 03679 } else { 03680 ST_DWORD(tbl+BPB_TotSec32, n_vol); 03681 } 03682 tbl[BPB_Media] = md; /* Media descriptor */ 03683 ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */ 03684 ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */ 03685 ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */ 03686 n = get_fattime(); /* Use current time as VSN */ 03687 if (fmt == FS_FAT32) { 03688 ST_DWORD(tbl+BS_VolID32, n); /* VSN */ 03689 ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */ 03690 ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */ 03691 ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (VBR+1) */ 03692 ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */ 03693 tbl[BS_DrvNum32] = 0x80; /* Drive number */ 03694 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */ 03695 mem_cpy(tbl+BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ 03696 } else { 03697 ST_DWORD(tbl+BS_VolID, n); /* VSN */ 03698 ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */ 03699 tbl[BS_DrvNum] = 0x80; /* Drive number */ 03700 tbl[BS_BootSig] = 0x29; /* Extended boot signature */ 03701 mem_cpy(tbl+BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ 03702 } 03703 ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */ 03704 if (disk_write(drv, tbl, b_vol, 1) != RES_OK) /* Write VBR */ 03705 return FR_DISK_ERR; 03706 if (fmt == FS_FAT32) /* Write backup VBR if needed (VBR+6) */ 03707 disk_write(drv, tbl, b_vol + 6, 1); 03708 03709 /* Initialize FAT area */ 03710 wsect = b_fat; 03711 for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */ 03712 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */ 03713 n = md; /* Media descriptor byte */ 03714 if (fmt != FS_FAT32) { 03715 n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00; 03716 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */ 03717 } else { 03718 n |= 0xFFFFFF00; 03719 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */ 03720 ST_DWORD(tbl+4, 0xFFFFFFFF); 03721 ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */ 03722 } 03723 if (disk_write(drv, tbl, wsect++, 1) != RES_OK) 03724 return FR_DISK_ERR; 03725 mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */ 03726 for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */ 03727 if (disk_write(drv, tbl, wsect++, 1) != RES_OK) 03728 return FR_DISK_ERR; 03729 } 03730 } 03731 03732 /* Initialize root directory */ 03733 i = (fmt == FS_FAT32) ? au : n_dir; 03734 do { 03735 if (disk_write(drv, tbl, wsect++, 1) != RES_OK) 03736 return FR_DISK_ERR; 03737 } while (--i); 03738 03739 #if _USE_ERASE /* Erase data area if needed */ 03740 { 03741 DWORD eb[2]; 03742 03743 eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1; 03744 disk_ioctl(drv, CTRL_ERASE_SECTOR, eb); 03745 } 03746 #endif 03747 03748 /* Create FSInfo if needed */ 03749 if (fmt == FS_FAT32) { 03750 ST_DWORD(tbl+FSI_LeadSig, 0x41615252); 03751 ST_DWORD(tbl+FSI_StrucSig, 0x61417272); 03752 ST_DWORD(tbl+FSI_Free_Count, n_clst - 1); /* Number of free clusters */ 03753 ST_DWORD(tbl+FSI_Nxt_Free, 2); /* Last allocated cluster# */ 03754 ST_WORD(tbl+BS_55AA, 0xAA55); 03755 disk_write(drv, tbl, b_vol + 1, 1); /* Write original (VBR+1) */ 03756 disk_write(drv, tbl, b_vol + 7, 1); /* Write backup (VBR+7) */ 03757 } 03758 03759 return (disk_ioctl(drv, CTRL_SYNC, (void*)0) == RES_OK) ? FR_OK : FR_DISK_ERR; 03760 } 03761 03762 #endif /* _USE_MKFS && !_FS_READONLY */ 03763 03764 03765 03766 03767 #if _USE_STRFUNC 03768 /*-----------------------------------------------------------------------*/ 03769 /* Get a string from the file */ 03770 /*-----------------------------------------------------------------------*/ 03771 TCHAR* f_gets ( 03772 TCHAR* buff, /* Pointer to the string buffer to read */ 03773 int len, /* Size of string buffer (characters) */ 03774 FIL_t* fil /* Pointer to the file object */ 03775 ) 03776 { 03777 int n = 0; 03778 TCHAR c, *p = buff; 03779 BYTE s[2]; 03780 UINT rc; 03781 03782 03783 while (n < len - 1) { /* Read bytes until buffer gets filled */ 03784 f_read(fil, s, 1, &rc); 03785 if (rc != 1) break; /* Break on EOF or error */ 03786 c = s[0]; 03787 #if _LFN_UNICODE /* Read a character in UTF-8 encoding */ 03788 if (c >= 0x80) { 03789 if (c < 0xC0) continue; /* Skip stray trailer */ 03790 if (c < 0xE0) { /* Two-byte sequense */ 03791 f_read(fil, s, 1, &rc); 03792 if (rc != 1) break; 03793 c = ((c & 0x1F) << 6) | (s[0] & 0x3F); 03794 if (c < 0x80) c = '?'; 03795 } else { 03796 if (c < 0xF0) { /* Three-byte sequense */ 03797 f_read(fil, s, 2, &rc); 03798 if (rc != 2) break; 03799 c = (c << 12) | ((s[0] & 0x3F) << 6) | (s[1] & 0x3F); 03800 if (c < 0x800) c = '?'; 03801 } else { /* Reject four-byte sequense */ 03802 c = '?'; 03803 } 03804 } 03805 } 03806 #endif 03807 #if _USE_STRFUNC >= 2 03808 if (c == '\r') continue; /* Strip '\r' */ 03809 #endif 03810 *p++ = c; 03811 n++; 03812 if (c == '\n') break; /* Break on EOL */ 03813 } 03814 *p = 0; 03815 return n ? buff : 0; /* When no data read (eof or error), return with error. */ 03816 } 03817 03818 03819 03820 #if !_FS_READONLY 03821 #include <stdarg.h> 03822 /*-----------------------------------------------------------------------*/ 03823 /* Put a character to the file */ 03824 /*-----------------------------------------------------------------------*/ 03825 int f_putc ( 03826 TCHAR c, /* A character to be output */ 03827 FIL_t* fil /* Pointer to the file object */ 03828 ) 03829 { 03830 UINT bw, btw; 03831 BYTE s[3]; 03832 03833 03834 #if _USE_STRFUNC >= 2 03835 if (c == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */ 03836 #endif 03837 03838 #if _LFN_UNICODE /* Write the character in UTF-8 encoding */ 03839 if (c < 0x80) { /* 7-bit */ 03840 s[0] = (BYTE)c; 03841 btw = 1; 03842 } else { 03843 if (c < 0x800) { /* 11-bit */ 03844 s[0] = (BYTE)(0xC0 | (c >> 6)); 03845 s[1] = (BYTE)(0x80 | (c & 0x3F)); 03846 btw = 2; 03847 } else { /* 16-bit */ 03848 s[0] = (BYTE)(0xE0 | (c >> 12)); 03849 s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F)); 03850 s[2] = (BYTE)(0x80 | (c & 0x3F)); 03851 btw = 3; 03852 } 03853 } 03854 #else /* Write the character without conversion */ 03855 s[0] = (BYTE)c; 03856 btw = 1; 03857 #endif 03858 f_write(fil, s, btw, &bw); /* Write the char to the file */ 03859 return (bw == btw) ? 1 : EOF; /* Return the result */ 03860 } 03861 03862 03863 03864 03865 /*-----------------------------------------------------------------------*/ 03866 /* Put a string to the file */ 03867 /*-----------------------------------------------------------------------*/ 03868 int f_puts ( 03869 const TCHAR* str, /* Pointer to the string to be output */ 03870 FIL_t* fil /* Pointer to the file object */ 03871 ) 03872 { 03873 int n; 03874 03875 03876 for (n = 0; *str; str++, n++) { 03877 if (f_putc(*str, fil) == EOF) return EOF; 03878 } 03879 return n; 03880 } 03881 03882 03883 03884 03885 /*-----------------------------------------------------------------------*/ 03886 /* Put a formatted string to the file */ 03887 /*-----------------------------------------------------------------------*/ 03888 int f_printf ( 03889 FIL_t* fil, /* Pointer to the file object */ 03890 const TCHAR* str, /* Pointer to the format string */ 03891 ... /* Optional arguments... */ 03892 ) 03893 { 03894 va_list arp; 03895 BYTE f, r; 03896 UINT i, j, w; 03897 ULONG v; 03898 TCHAR c, d, s[16], *p; 03899 int res, cc; 03900 03901 03902 va_start(arp, str); 03903 03904 for (cc = res = 0; cc != EOF; res += cc) { 03905 c = *str++; 03906 if (c == 0) break; /* End of string */ 03907 if (c != '%') { /* Non escape character */ 03908 cc = f_putc(c, fil); 03909 if (cc != EOF) cc = 1; 03910 continue; 03911 } 03912 w = f = 0; 03913 c = *str++; 03914 if (c == '0') { /* Flag: '0' padding */ 03915 f = 1; c = *str++; 03916 } else { 03917 if (c == '-') { /* Flag: left justified */ 03918 f = 2; c = *str++; 03919 } 03920 } 03921 while (IsDigit(c)) { /* Precision */ 03922 w = w * 10 + c - '0'; 03923 c = *str++; 03924 } 03925 if (c == 'l' || c == 'L') { /* Prefix: Size is long int */ 03926 f |= 4; c = *str++; 03927 } 03928 if (!c) break; 03929 d = c; 03930 if (IsLower(d)) d -= 0x20; 03931 switch (d) { /* Type is... */ 03932 case 'S' : /* String */ 03933 p = va_arg(arp, TCHAR*); 03934 for (j = 0; p[j]; j++) ; 03935 res = 0; 03936 while (!(f & 2) && j++ < w) res += (cc = f_putc(' ', fil)); 03937 res += (cc = f_puts(p, fil)); 03938 while (j++ < w) res += (cc = f_putc(' ', fil)); 03939 if (cc != EOF) cc = res; 03940 continue; 03941 case 'C' : /* Character */ 03942 cc = f_putc((TCHAR)va_arg(arp, int), fil); continue; 03943 case 'B' : /* Binary */ 03944 r = 2; break; 03945 case 'O' : /* Octal */ 03946 r = 8; break; 03947 case 'D' : /* Signed decimal */ 03948 case 'U' : /* Unsigned decimal */ 03949 r = 10; break; 03950 case 'X' : /* Hexdecimal */ 03951 r = 16; break; 03952 default: /* Unknown type (passthrough) */ 03953 cc = f_putc(c, fil); continue; 03954 } 03955 03956 /* Get an argument and put it in numeral */ 03957 v = (f & 4) ? va_arg(arp, long) : ((d == 'D') ? (long)va_arg(arp, int) : va_arg(arp, unsigned int)); 03958 if (d == 'D' && (v & 0x80000000)) { 03959 v = 0 - v; 03960 f |= 8; 03961 } 03962 i = 0; 03963 do { 03964 d = (TCHAR)(v % r); v /= r; 03965 if (d > 9) d += (c == 'x') ? 0x27 : 0x07; 03966 s[i++] = d + '0'; 03967 } while (v && i < sizeof(s) / sizeof(s[0])); 03968 if (f & 8) s[i++] = '-'; 03969 j = i; d = (f & 1) ? '0' : ' '; 03970 res = 0; 03971 while (!(f & 2) && j++ < w) res += (cc = f_putc(d, fil)); 03972 do res += (cc = f_putc(s[--i], fil)); while(i); 03973 while (j++ < w) res += (cc = f_putc(' ', fil)); 03974 if (cc != EOF) cc = res; 03975 } 03976 03977 va_end(arp); 03978 return (cc == EOF) ? cc : res; 03979 } 03980 03981 #endif /* !_FS_READONLY */ 03982 #endif /* _USE_STRFUNC */
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