Eli Hughes
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ff.c
00001 00002 00003 /*----------------------------------------------------------------------------/ 00004 / FatFs - FAT file system module R0.09 (C)ChaN, 2011 00005 /-----------------------------------------------------------------------------/ 00006 / FatFs module is a generic FAT file system module for small embedded systems. 00007 / This is a free software that opened for education, research and commercial 00008 / developments under license policy of following terms. 00009 / 00010 / Copyright (C) 2011, ChaN, all right reserved. 00011 / 00012 / * The FatFs module is a free software and there is NO WARRANTY. 00013 / * No restriction on use. You can use, modify and redistribute it for 00014 / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY. 00015 / * Redistributions of source code must retain the above copyright notice. 00016 / 00017 /-----------------------------------------------------------------------------/ 00018 / Feb 26,'06 R0.00 Prototype. 00019 / 00020 / Apr 29,'06 R0.01 First stable version. 00021 / 00022 / Jun 01,'06 R0.02 Added FAT12 support. 00023 / Removed unbuffered mode. 00024 / Fixed a problem on small (<32M) partition. 00025 / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM). 00026 / 00027 / Sep 22,'06 R0.03 Added f_rename(). 00028 / Changed option _FS_MINIMUM to _FS_MINIMIZE. 00029 / Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast. 00030 / Fixed f_mkdir() creates incorrect directory on FAT32. 00031 / 00032 / Feb 04,'07 R0.04 Supported multiple drive system. 00033 / Changed some interfaces for multiple drive system. 00034 / Changed f_mountdrv() to f_mount(). 00035 / Added f_mkfs(). 00036 / Apr 01,'07 R0.04a Supported multiple partitions on a physical drive. 00037 / Added a capability of extending file size to f_lseek(). 00038 / Added minimization level 3. 00039 / Fixed an endian sensitive code in f_mkfs(). 00040 / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG. 00041 / Added FSInfo support. 00042 / Fixed DBCS name can result FR_INVALID_NAME. 00043 / Fixed short seek (<= csize) collapses the file object. 00044 / 00045 / Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs(). 00046 / Fixed f_mkfs() on FAT32 creates incorrect FSInfo. 00047 / Fixed f_mkdir() on FAT32 creates incorrect directory. 00048 / Feb 03,'08 R0.05a Added f_truncate() and f_utime(). 00049 / Fixed off by one error at FAT sub-type determination. 00050 / Fixed btr in f_read() can be mistruncated. 00051 / Fixed cached sector is not flushed when create and close without write. 00052 / 00053 / Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets(). 00054 / Improved performance of f_lseek() on moving to the same or following cluster. 00055 / 00056 / Apr 01,'09 R0.07 Merged Tiny-FatFs as a configuration option. (_FS_TINY) 00057 / Added long file name feature. 00058 / Added multiple code page feature. 00059 / Added re-entrancy for multitask operation. 00060 / Added auto cluster size selection to f_mkfs(). 00061 / Added rewind option to f_readdir(). 00062 / Changed result code of critical errors. 00063 / Renamed string functions to avoid name collision. 00064 / Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg. 00065 / Added multiple sector size feature. 00066 / Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error. 00067 / Fixed wrong cache control in f_lseek(). 00068 / Added relative path feature. 00069 / Added f_chdir() and f_chdrive(). 00070 / Added proper case conversion to extended char. 00071 / Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h. 00072 / Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH. 00073 / Fixed name matching error on the 13 char boundary. 00074 / Added a configuration option, _LFN_UNICODE. 00075 / Changed f_readdir() to return the SFN with always upper case on non-LFN cfg. 00076 / 00077 / May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN = 3) 00078 / Added file lock feature. (_FS_SHARE) 00079 / Added fast seek feature. (_USE_FASTSEEK) 00080 / Changed some types on the API, XCHAR->TCHAR. 00081 / Changed fname member in the FILINFO structure on Unicode cfg. 00082 / String functions support UTF-8 encoding files on Unicode cfg. 00083 / Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2) 00084 / Added sector erase feature. (_USE_ERASE) 00085 / Moved file lock semaphore table from fs object to the bss. 00086 / Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'. 00087 / Fixed f_mkfs() creates wrong FAT32 volume. 00088 / Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write(). 00089 / f_lseek() reports required table size on creating CLMP. 00090 / Extended format syntax of f_printf function. 00091 / Ignores duplicated directory separators in given path names. 00092 / 00093 / Sep 06,'11 R0.09 f_mkfs() supports multiple partition to finish the multiple partition feature. 00094 / Added f_fdisk(). (_MULTI_PARTITION = 2) 00095 /---------------------------------------------------------------------------*/ 00096 00097 #include "ff.h" /* FatFs configurations and declarations */ 00098 #include "diskio.h" /* Declarations of low level disk I/O functions */ 00099 00100 00101 /*-------------------------------------------------------------------------- 00102 00103 Module Private Definitions 00104 00105 ---------------------------------------------------------------------------*/ 00106 00107 #if _FATFS != 6502 /* Revision ID */ 00108 #error Wrong include file (ff.h). 00109 #endif 00110 00111 00112 /* Definitions on sector size */ 00113 #if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096 00114 #error Wrong sector size. 00115 #endif 00116 #if _MAX_SS != 512 00117 #define SS(fs) ((fs)->ssize) /* Variable sector size */ 00118 #else 00119 #define SS(fs) 512U /* Fixed sector size */ 00120 #endif 00121 00122 00123 /* Reentrancy related */ 00124 #if _FS_REENTRANT 00125 #if _USE_LFN == 1 00126 #error Static LFN work area must not be used in re-entrant configuration. 00127 #endif 00128 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; } 00129 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } 00130 #else 00131 #define ENTER_FF(fs) 00132 #define LEAVE_FF(fs, res) return res 00133 #endif 00134 00135 #define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); } 00136 00137 00138 /* File shareing feature */ 00139 #if _FS_SHARE 00140 #if _FS_READONLY 00141 #error _FS_SHARE must be 0 on read-only cfg. 00142 #endif 00143 typedef struct { 00144 FATFS *fs; /* File ID 1, volume (NULL:blank entry) */ 00145 DWORD clu; /* File ID 2, directory */ 00146 WORD idx; /* File ID 3, directory index */ 00147 WORD ctr; /* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */ 00148 } FILESEM; 00149 #endif 00150 00151 00152 /* Misc definitions */ 00153 #define LD_CLUST(dir) (((DWORD)LD_WORD(dir+DIR_FstClusHI)<<16) | LD_WORD(dir+DIR_FstClusLO)) 00154 #define ST_CLUST(dir,cl) {ST_WORD(dir+DIR_FstClusLO, cl); ST_WORD(dir+DIR_FstClusHI, (DWORD)cl>>16);} 00155 00156 00157 /* DBCS code ranges and SBCS extend char conversion table */ 00158 00159 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */ 00160 #define _DF1S 0x81 /* DBC 1st byte range 1 start */ 00161 #define _DF1E 0x9F /* DBC 1st byte range 1 end */ 00162 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */ 00163 #define _DF2E 0xFC /* DBC 1st byte range 2 end */ 00164 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */ 00165 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */ 00166 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */ 00167 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */ 00168 00169 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */ 00170 #define _DF1S 0x81 00171 #define _DF1E 0xFE 00172 #define _DS1S 0x40 00173 #define _DS1E 0x7E 00174 #define _DS2S 0x80 00175 #define _DS2E 0xFE 00176 00177 #elif _CODE_PAGE == 949 /* Korean */ 00178 #define _DF1S 0x81 00179 #define _DF1E 0xFE 00180 #define _DS1S 0x41 00181 #define _DS1E 0x5A 00182 #define _DS2S 0x61 00183 #define _DS2E 0x7A 00184 #define _DS3S 0x81 00185 #define _DS3E 0xFE 00186 00187 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */ 00188 #define _DF1S 0x81 00189 #define _DF1E 0xFE 00190 #define _DS1S 0x40 00191 #define _DS1E 0x7E 00192 #define _DS2S 0xA1 00193 #define _DS2E 0xFE 00194 00195 #elif _CODE_PAGE == 437 /* U.S. (OEM) */ 00196 #define _DF1S 0 00197 #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, \ 00198 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, \ 00199 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, \ 00200 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} 00201 00202 #elif _CODE_PAGE == 720 /* Arabic (OEM) */ 00203 #define _DF1S 0 00204 #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, \ 00205 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, \ 00206 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, \ 00207 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} 00208 00209 #elif _CODE_PAGE == 737 /* Greek (OEM) */ 00210 #define _DF1S 0 00211 #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, \ 00212 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, \ 00213 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, \ 00214 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} 00215 00216 #elif _CODE_PAGE == 775 /* Baltic (OEM) */ 00217 #define _DF1S 0 00218 #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, \ 00219 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, \ 00220 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, \ 00221 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} 00222 00223 #elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */ 00224 #define _DF1S 0 00225 #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, \ 00226 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, \ 00227 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, \ 00228 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} 00229 00230 #elif _CODE_PAGE == 852 /* Latin 2 (OEM) */ 00231 #define _DF1S 0 00232 #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, \ 00233 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, \ 00234 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, \ 00235 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} 00236 00237 #elif _CODE_PAGE == 855 /* Cyrillic (OEM) */ 00238 #define _DF1S 0 00239 #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, \ 00240 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, \ 00241 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, \ 00242 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} 00243 00244 #elif _CODE_PAGE == 857 /* Turkish (OEM) */ 00245 #define _DF1S 0 00246 #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, \ 00247 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, \ 00248 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, \ 00249 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} 00250 00251 #elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */ 00252 #define _DF1S 0 00253 #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, \ 00254 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, \ 00255 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, \ 00256 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} 00257 00258 #elif _CODE_PAGE == 862 /* Hebrew (OEM) */ 00259 #define _DF1S 0 00260 #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, \ 00261 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, \ 00262 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, \ 00263 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} 00264 00265 #elif _CODE_PAGE == 866 /* Russian (OEM) */ 00266 #define _DF1S 0 00267 #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, \ 00268 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, \ 00269 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, \ 00270 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} 00271 00272 #elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */ 00273 #define _DF1S 0 00274 #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, \ 00275 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, \ 00276 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, \ 00277 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} 00278 00279 #elif _CODE_PAGE == 1250 /* Central Europe (Windows) */ 00280 #define _DF1S 0 00281 #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, \ 00282 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, \ 00283 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, \ 00284 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} 00285 00286 #elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */ 00287 #define _DF1S 0 00288 #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, \ 00289 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, \ 00290 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, \ 00291 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} 00292 00293 #elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */ 00294 #define _DF1S 0 00295 #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, \ 00296 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, \ 00297 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, \ 00298 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} 00299 00300 #elif _CODE_PAGE == 1253 /* Greek (Windows) */ 00301 #define _DF1S 0 00302 #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, \ 00303 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, \ 00304 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, \ 00305 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} 00306 00307 #elif _CODE_PAGE == 1254 /* Turkish (Windows) */ 00308 #define _DF1S 0 00309 #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, \ 00310 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, \ 00311 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, \ 00312 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} 00313 00314 #elif _CODE_PAGE == 1255 /* Hebrew (Windows) */ 00315 #define _DF1S 0 00316 #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, \ 00317 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, \ 00318 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, \ 00319 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} 00320 00321 #elif _CODE_PAGE == 1256 /* Arabic (Windows) */ 00322 #define _DF1S 0 00323 #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, \ 00324 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, \ 00325 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, \ 00326 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} 00327 00328 #elif _CODE_PAGE == 1257 /* Baltic (Windows) */ 00329 #define _DF1S 0 00330 #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, \ 00331 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, \ 00332 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, \ 00333 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} 00334 00335 #elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */ 00336 #define _DF1S 0 00337 #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, \ 00338 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, \ 00339 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, \ 00340 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} 00341 00342 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */ 00343 #if _USE_LFN 00344 #error Cannot use LFN feature without valid code page. 00345 #endif 00346 #define _DF1S 0 00347 00348 #else 00349 #error Unknown code page 00350 00351 #endif 00352 00353 00354 /* Character code support macros */ 00355 #define IsUpper(c) (((c)>='A')&&((c)<='Z')) 00356 #define IsLower(c) (((c)>='a')&&((c)<='z')) 00357 #define IsDigit(c) (((c)>='0')&&((c)<='9')) 00358 00359 #if _DF1S /* Code page is DBCS */ 00360 00361 #ifdef _DF2S /* Two 1st byte areas */ 00362 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) 00363 #else /* One 1st byte area */ 00364 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) 00365 #endif 00366 00367 #ifdef _DS3S /* Three 2nd byte areas */ 00368 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) 00369 #else /* Two 2nd byte areas */ 00370 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) 00371 #endif 00372 00373 #else /* Code page is SBCS */ 00374 00375 #define IsDBCS1(c) 0 00376 #define IsDBCS2(c) 0 00377 00378 #endif /* _DF1S */ 00379 00380 00381 /* Name status flags */ 00382 #define NS 11 /* Index of name status byte in fn[] */ 00383 #define NS_LOSS 0x01 /* Out of 8.3 format */ 00384 #define NS_LFN 0x02 /* Force to create LFN entry */ 00385 #define NS_LAST 0x04 /* Last segment */ 00386 #define NS_BODY 0x08 /* Lower case flag (body) */ 00387 #define NS_EXT 0x10 /* Lower case flag (ext) */ 00388 #define NS_DOT 0x20 /* Dot entry */ 00389 00390 00391 /* FAT sub-type boundaries */ 00392 /* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */ 00393 #define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */ 00394 #define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */ 00395 00396 00397 /* FatFs refers the members in the FAT structures as byte array instead of 00398 / structure member because the structure is not binary compatible between 00399 / different platforms */ 00400 00401 #define BS_jmpBoot 0 /* Jump instruction (3) */ 00402 #define BS_OEMName 3 /* OEM name (8) */ 00403 #define BPB_BytsPerSec 11 /* Sector size [byte] (2) */ 00404 #define BPB_SecPerClus 13 /* Cluster size [sector] (1) */ 00405 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */ 00406 #define BPB_NumFATs 16 /* Number of FAT copies (1) */ 00407 #define BPB_RootEntCnt 17 /* Number of root dir entries for FAT12/16 (2) */ 00408 #define BPB_TotSec16 19 /* Volume size [sector] (2) */ 00409 #define BPB_Media 21 /* Media descriptor (1) */ 00410 #define BPB_FATSz16 22 /* FAT size [sector] (2) */ 00411 #define BPB_SecPerTrk 24 /* Track size [sector] (2) */ 00412 #define BPB_NumHeads 26 /* Number of heads (2) */ 00413 #define BPB_HiddSec 28 /* Number of special hidden sectors (4) */ 00414 #define BPB_TotSec32 32 /* Volume size [sector] (4) */ 00415 #define BS_DrvNum 36 /* Physical drive number (2) */ 00416 #define BS_BootSig 38 /* Extended boot signature (1) */ 00417 #define BS_VolID 39 /* Volume serial number (4) */ 00418 #define BS_VolLab 43 /* Volume label (8) */ 00419 #define BS_FilSysType 54 /* File system type (1) */ 00420 #define BPB_FATSz32 36 /* FAT size [sector] (4) */ 00421 #define BPB_ExtFlags 40 /* Extended flags (2) */ 00422 #define BPB_FSVer 42 /* File system version (2) */ 00423 #define BPB_RootClus 44 /* Root dir first cluster (4) */ 00424 #define BPB_FSInfo 48 /* Offset of FSInfo sector (2) */ 00425 #define BPB_BkBootSec 50 /* Offset of backup boot sectot (2) */ 00426 #define BS_DrvNum32 64 /* Physical drive number (2) */ 00427 #define BS_BootSig32 66 /* Extended boot signature (1) */ 00428 #define BS_VolID32 67 /* Volume serial number (4) */ 00429 #define BS_VolLab32 71 /* Volume label (8) */ 00430 #define BS_FilSysType32 82 /* File system type (1) */ 00431 #define FSI_LeadSig 0 /* FSI: Leading signature (4) */ 00432 #define FSI_StrucSig 484 /* FSI: Structure signature (4) */ 00433 #define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */ 00434 #define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */ 00435 #define MBR_Table 446 /* MBR: Partition table offset (2) */ 00436 #define SZ_PTE 16 /* MBR: Size of a partition table entry */ 00437 #define BS_55AA 510 /* Boot sector signature (2) */ 00438 00439 #define DIR_Name 0 /* Short file name (11) */ 00440 #define DIR_Attr 11 /* Attribute (1) */ 00441 #define DIR_NTres 12 /* NT flag (1) */ 00442 #define DIR_CrtTime 14 /* Created time (2) */ 00443 #define DIR_CrtDate 16 /* Created date (2) */ 00444 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */ 00445 #define DIR_WrtTime 22 /* Modified time (2) */ 00446 #define DIR_WrtDate 24 /* Modified date (2) */ 00447 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */ 00448 #define DIR_FileSize 28 /* File size (4) */ 00449 #define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */ 00450 #define LDIR_Attr 11 /* LFN attribute (1) */ 00451 #define LDIR_Type 12 /* LFN type (1) */ 00452 #define LDIR_Chksum 13 /* Sum of corresponding SFN entry */ 00453 #define LDIR_FstClusLO 26 /* Filled by zero (0) */ 00454 #define SZ_DIR 32 /* Size of a directory entry */ 00455 #define LLE 0x40 /* Last long entry flag in LDIR_Ord */ 00456 #define DDE 0xE5 /* Deleted directory enrty mark in DIR_Name[0] */ 00457 #define NDDE 0x05 /* Replacement of a character collides with DDE */ 00458 00459 00460 /*------------------------------------------------------------*/ 00461 /* Module private work area */ 00462 /*------------------------------------------------------------*/ 00463 /* Note that uninitialized variables with static duration are 00464 / zeroed/nulled at start-up. If not, the compiler or start-up 00465 / routine is out of ANSI-C standard. 00466 */ 00467 00468 #if _VOLUMES 00469 static 00470 FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */ 00471 #else 00472 #error Number of volumes must not be 0. 00473 #endif 00474 00475 static 00476 WORD Fsid; /* File system mount ID */ 00477 00478 #if _FS_RPATH 00479 static 00480 BYTE CurrVol; /* Current drive */ 00481 #endif 00482 00483 #if _FS_SHARE 00484 static 00485 FILESEM Files[_FS_SHARE]; /* File lock semaphores */ 00486 #endif 00487 00488 #if _USE_LFN == 0 /* No LFN feature */ 00489 #define DEF_NAMEBUF BYTE sfn[12] 00490 #define INIT_BUF(dobj) (dobj).fn = sfn 00491 #define FREE_BUF() 00492 00493 #elif _USE_LFN == 1 /* LFN feature with static working buffer */ 00494 static WCHAR LfnBuf[_MAX_LFN+1]; 00495 #define DEF_NAMEBUF BYTE sfn[12] 00496 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; } 00497 #define FREE_BUF() 00498 00499 #elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */ 00500 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1] 00501 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; } 00502 #define FREE_BUF() 00503 00504 #elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */ 00505 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn 00506 #define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \ 00507 if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \ 00508 (dobj).lfn = lfn; (dobj).fn = sfn; } 00509 #define FREE_BUF() ff_memfree(lfn) 00510 00511 #else 00512 #error Wrong LFN configuration. 00513 #endif 00514 00515 00516 00517 00518 /*-------------------------------------------------------------------------- 00519 00520 Module Private Functions 00521 00522 ---------------------------------------------------------------------------*/ 00523 00524 00525 /*-----------------------------------------------------------------------*/ 00526 /* String functions */ 00527 /*-----------------------------------------------------------------------*/ 00528 00529 /* Copy memory to memory */ 00530 static 00531 void mem_cpy (void* dst, const void* src, UINT cnt) { 00532 BYTE *d = (BYTE*)dst; 00533 const BYTE *s = (const BYTE*)src; 00534 00535 #if _WORD_ACCESS == 1 00536 while (cnt >= sizeof(int)) { 00537 *(int*)d = *(int*)s; 00538 d += sizeof(int); s += sizeof(int); 00539 cnt -= sizeof(int); 00540 } 00541 #endif 00542 while (cnt--) 00543 *d++ = *s++; 00544 } 00545 00546 /* Fill memory */ 00547 static 00548 void mem_set (void* dst, int val, UINT cnt) { 00549 BYTE *d = (BYTE*)dst; 00550 00551 while (cnt--) 00552 *d++ = (BYTE)val; 00553 } 00554 00555 /* Compare memory to memory */ 00556 static 00557 int mem_cmp (const void* dst, const void* src, UINT cnt) { 00558 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; 00559 int r = 0; 00560 00561 while (cnt-- && (r = *d++ - *s++) == 0) ; 00562 return r; 00563 } 00564 00565 /* Check if chr is contained in the string */ 00566 static 00567 int chk_chr (const char* str, int chr) { 00568 while (*str && *str != chr) str++; 00569 return *str; 00570 } 00571 00572 00573 00574 /*-----------------------------------------------------------------------*/ 00575 /* Request/Release grant to access the volume */ 00576 /*-----------------------------------------------------------------------*/ 00577 #if _FS_REENTRANT 00578 00579 static 00580 int lock_fs ( 00581 FATFS *fs /* File system object */ 00582 ) 00583 { 00584 return ff_req_grant(fs->sobj); 00585 } 00586 00587 00588 static 00589 void unlock_fs ( 00590 FATFS *fs, /* File system object */ 00591 FRESULT res /* Result code to be returned */ 00592 ) 00593 { 00594 if (res != FR_NOT_ENABLED && 00595 res != FR_INVALID_DRIVE && 00596 res != FR_INVALID_OBJECT && 00597 res != FR_TIMEOUT) { 00598 ff_rel_grant(fs->sobj); 00599 } 00600 } 00601 #endif 00602 00603 00604 00605 /*-----------------------------------------------------------------------*/ 00606 /* File shareing control functions */ 00607 /*-----------------------------------------------------------------------*/ 00608 #if _FS_SHARE 00609 00610 static 00611 FRESULT chk_lock ( /* Check if the file can be accessed */ 00612 DIR* dj, /* Directory object pointing the file to be checked */ 00613 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ 00614 ) 00615 { 00616 UINT i, be; 00617 00618 /* Search file semaphore table */ 00619 for (i = be = 0; i < _FS_SHARE; i++) { 00620 if (Files[i].fs) { /* Existing entry */ 00621 if (Files[i].fs == dj->fs && /* Check if the file matched with an open file */ 00622 Files[i].clu == dj->sclust && 00623 Files[i].idx == dj->index) break; 00624 } else { /* Blank entry */ 00625 be++; 00626 } 00627 } 00628 if (i == _FS_SHARE) /* The file is not opened */ 00629 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new file? */ 00630 00631 /* The file has been opened. Reject any open against writing file and all write mode open */ 00632 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK; 00633 } 00634 00635 00636 static 00637 int enq_lock (void) /* Check if an entry is available for a new file */ 00638 { 00639 UINT i; 00640 00641 for (i = 0; i < _FS_SHARE && Files[i].fs; i++) ; 00642 return (i == _FS_SHARE) ? 0 : 1; 00643 } 00644 00645 00646 static 00647 UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */ 00648 DIR* dj, /* Directory object pointing the file to register or increment */ 00649 int acc /* Desired access mode (0:Read, !0:Write) */ 00650 ) 00651 { 00652 UINT i; 00653 00654 00655 for (i = 0; i < _FS_SHARE; i++) { /* Find the file */ 00656 if (Files[i].fs == dj->fs && 00657 Files[i].clu == dj->sclust && 00658 Files[i].idx == dj->index) break; 00659 } 00660 00661 if (i == _FS_SHARE) { /* Not opened. Register it as new. */ 00662 for (i = 0; i < _FS_SHARE && Files[i].fs; i++) ; 00663 if (i == _FS_SHARE) return 0; /* No space to register (int err) */ 00664 Files[i].fs = dj->fs; 00665 Files[i].clu = dj->sclust; 00666 Files[i].idx = dj->index; 00667 Files[i].ctr = 0; 00668 } 00669 00670 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */ 00671 00672 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */ 00673 00674 return i + 1; 00675 } 00676 00677 00678 static 00679 FRESULT dec_lock ( /* Decrement file open counter */ 00680 UINT i /* Semaphore index */ 00681 ) 00682 { 00683 WORD n; 00684 FRESULT res; 00685 00686 00687 if (--i < _FS_SHARE) { 00688 n = Files[i].ctr; 00689 if (n == 0x100) n = 0; 00690 if (n) n--; 00691 Files[i].ctr = n; 00692 if (!n) Files[i].fs = 0; 00693 res = FR_OK; 00694 } else { 00695 res = FR_INT_ERR; 00696 } 00697 return res; 00698 } 00699 00700 00701 static 00702 void clear_lock ( /* Clear lock entries of the volume */ 00703 FATFS *fs 00704 ) 00705 { 00706 UINT i; 00707 00708 for (i = 0; i < _FS_SHARE; i++) { 00709 if (Files[i].fs == fs) Files[i].fs = 0; 00710 } 00711 } 00712 #endif 00713 00714 00715 00716 /*-----------------------------------------------------------------------*/ 00717 /* Change window offset */ 00718 /*-----------------------------------------------------------------------*/ 00719 00720 static 00721 FRESULT move_window ( 00722 FATFS *fs, /* File system object */ 00723 DWORD sector /* Sector number to make appearance in the fs->win[] */ 00724 ) /* Move to zero only writes back dirty window */ 00725 { 00726 DWORD wsect; 00727 00728 00729 wsect = fs->winsect; 00730 if (wsect != sector) { /* Changed current window */ 00731 #if !_FS_READONLY 00732 if (fs->wflag) { /* Write back dirty window if needed */ 00733 if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) 00734 return FR_DISK_ERR; 00735 fs->wflag = 0; 00736 if (wsect < (fs->fatbase + fs->fsize)) { /* In FAT area */ 00737 BYTE nf; 00738 for (nf = fs->n_fats; nf > 1; nf--) { /* Reflect the change to all FAT copies */ 00739 wsect += fs->fsize; 00740 disk_write(fs->drv, fs->win, wsect, 1); 00741 } 00742 } 00743 } 00744 #endif 00745 if (sector) { 00746 if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) 00747 return FR_DISK_ERR; 00748 fs->winsect = sector; 00749 } 00750 } 00751 00752 return FR_OK; 00753 } 00754 00755 00756 00757 00758 /*-----------------------------------------------------------------------*/ 00759 /* Clean-up cached data */ 00760 /*-----------------------------------------------------------------------*/ 00761 #if !_FS_READONLY 00762 static 00763 FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */ 00764 FATFS *fs /* File system object */ 00765 ) 00766 { 00767 FRESULT res; 00768 00769 00770 res = move_window(fs, 0); 00771 if (res == FR_OK) { 00772 /* Update FSInfo sector if needed */ 00773 if (fs->fs_type == FS_FAT32 && fs->fsi_flag) { 00774 fs->winsect = 0; 00775 /* Create FSInfo structure */ 00776 mem_set(fs->win, 0, 512); 00777 ST_WORD(fs->win+BS_55AA, 0xAA55); 00778 ST_DWORD(fs->win+FSI_LeadSig, 0x41615252); 00779 ST_DWORD(fs->win+FSI_StrucSig, 0x61417272); 00780 ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust); 00781 ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust); 00782 /* Write it into the FSInfo sector */ 00783 disk_write(fs->drv, fs->win, fs->fsi_sector, 1); 00784 fs->fsi_flag = 0; 00785 } 00786 /* Make sure that no pending write process in the physical drive */ 00787 if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK) 00788 res = FR_DISK_ERR; 00789 } 00790 00791 return res; 00792 } 00793 #endif 00794 00795 00796 00797 00798 /*-----------------------------------------------------------------------*/ 00799 /* Get sector# from cluster# */ 00800 /*-----------------------------------------------------------------------*/ 00801 00802 00803 DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */ 00804 FATFS *fs, /* File system object */ 00805 DWORD clst /* Cluster# to be converted */ 00806 ) 00807 { 00808 clst -= 2; 00809 if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */ 00810 return clst * fs->csize + fs->database; 00811 } 00812 00813 00814 00815 00816 /*-----------------------------------------------------------------------*/ 00817 /* FAT access - Read value of a FAT entry */ 00818 /*-----------------------------------------------------------------------*/ 00819 00820 00821 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */ 00822 FATFS *fs, /* File system object */ 00823 DWORD clst /* Cluster# to get the link information */ 00824 ) 00825 { 00826 UINT wc, bc; 00827 BYTE *p; 00828 00829 00830 if (clst < 2 || clst >= fs->n_fatent) /* Chack range */ 00831 return 1; 00832 00833 switch (fs->fs_type) { 00834 case FS_FAT12 : 00835 bc = (UINT)clst; bc += bc / 2; 00836 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break; 00837 wc = fs->win[bc % SS(fs)]; bc++; 00838 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break; 00839 wc |= fs->win[bc % SS(fs)] << 8; 00840 return (clst & 1) ? (wc >> 4) : (wc & 0xFFF); 00841 00842 case FS_FAT16 : 00843 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break; 00844 p = &fs->win[clst * 2 % SS(fs)]; 00845 return LD_WORD(p); 00846 00847 case FS_FAT32 : 00848 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break; 00849 p = &fs->win[clst * 4 % SS(fs)]; 00850 return LD_DWORD(p) & 0x0FFFFFFF; 00851 } 00852 00853 return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */ 00854 } 00855 00856 00857 00858 00859 /*-----------------------------------------------------------------------*/ 00860 /* FAT access - Change value of a FAT entry */ 00861 /*-----------------------------------------------------------------------*/ 00862 #if !_FS_READONLY 00863 00864 FRESULT put_fat ( 00865 FATFS *fs, /* File system object */ 00866 DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */ 00867 DWORD val /* New value to mark the cluster */ 00868 ) 00869 { 00870 UINT bc; 00871 BYTE *p; 00872 FRESULT res; 00873 00874 00875 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ 00876 res = FR_INT_ERR; 00877 00878 } else { 00879 switch (fs->fs_type) { 00880 case FS_FAT12 : 00881 bc = clst; bc += bc / 2; 00882 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 00883 if (res != FR_OK) break; 00884 p = &fs->win[bc % SS(fs)]; 00885 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; 00886 bc++; 00887 fs->wflag = 1; 00888 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 00889 if (res != FR_OK) break; 00890 p = &fs->win[bc % SS(fs)]; 00891 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); 00892 break; 00893 00894 case FS_FAT16 : 00895 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); 00896 if (res != FR_OK) break; 00897 p = &fs->win[clst * 2 % SS(fs)]; 00898 ST_WORD(p, (WORD)val); 00899 break; 00900 00901 case FS_FAT32 : 00902 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); 00903 if (res != FR_OK) break; 00904 p = &fs->win[clst * 4 % SS(fs)]; 00905 val |= LD_DWORD(p) & 0xF0000000; 00906 ST_DWORD(p, val); 00907 break; 00908 00909 default : 00910 res = FR_INT_ERR; 00911 } 00912 fs->wflag = 1; 00913 } 00914 00915 return res; 00916 } 00917 #endif /* !_FS_READONLY */ 00918 00919 00920 00921 00922 /*-----------------------------------------------------------------------*/ 00923 /* FAT handling - Remove a cluster chain */ 00924 /*-----------------------------------------------------------------------*/ 00925 #if !_FS_READONLY 00926 static 00927 FRESULT remove_chain ( 00928 FATFS *fs, /* File system object */ 00929 DWORD clst /* Cluster# to remove a chain from */ 00930 ) 00931 { 00932 FRESULT res; 00933 DWORD nxt; 00934 #if _USE_ERASE 00935 DWORD scl = clst, ecl = clst, resion[2]; 00936 #endif 00937 00938 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ 00939 res = FR_INT_ERR; 00940 00941 } else { 00942 res = FR_OK; 00943 while (clst < fs->n_fatent) { /* Not a last link? */ 00944 nxt = get_fat(fs, clst); /* Get cluster status */ 00945 if (nxt == 0) break; /* Empty cluster? */ 00946 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */ 00947 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */ 00948 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */ 00949 if (res != FR_OK) break; 00950 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */ 00951 fs->free_clust++; 00952 fs->fsi_flag = 1; 00953 } 00954 #if _USE_ERASE 00955 if (ecl + 1 == nxt) { /* Next cluster is contiguous */ 00956 ecl = nxt; 00957 } else { /* End of contiguous clusters */ 00958 resion[0] = clust2sect(fs, scl); /* Start sector */ 00959 resion[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ 00960 disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, resion); /* Erase the block */ 00961 scl = ecl = nxt; 00962 } 00963 #endif 00964 clst = nxt; /* Next cluster */ 00965 } 00966 } 00967 00968 return res; 00969 } 00970 #endif 00971 00972 00973 00974 00975 /*-----------------------------------------------------------------------*/ 00976 /* FAT handling - Stretch or Create a cluster chain */ 00977 /*-----------------------------------------------------------------------*/ 00978 #if !_FS_READONLY 00979 static 00980 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ 00981 FATFS *fs, /* File system object */ 00982 DWORD clst /* Cluster# to stretch. 0 means create a new chain. */ 00983 ) 00984 { 00985 DWORD cs, ncl, scl; 00986 FRESULT res; 00987 00988 00989 if (clst == 0) { /* Create a new chain */ 00990 scl = fs->last_clust; /* Get suggested start point */ 00991 if (!scl || scl >= fs->n_fatent) scl = 1; 00992 } 00993 else { /* Stretch the current chain */ 00994 cs = get_fat(fs, clst); /* Check the cluster status */ 00995 if (cs < 2) return 1; /* It is an invalid cluster */ 00996 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */ 00997 scl = clst; 00998 } 00999 01000 ncl = scl; /* Start cluster */ 01001 for (;;) { 01002 ncl++; /* Next cluster */ 01003 if (ncl >= fs->n_fatent) { /* Wrap around */ 01004 ncl = 2; 01005 if (ncl > scl) return 0; /* No free cluster */ 01006 } 01007 cs = get_fat(fs, ncl); /* Get the cluster status */ 01008 if (cs == 0) break; /* Found a free cluster */ 01009 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */ 01010 return cs; 01011 if (ncl == scl) return 0; /* No free cluster */ 01012 } 01013 01014 res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */ 01015 if (res == FR_OK && clst != 0) { 01016 res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */ 01017 } 01018 if (res == FR_OK) { 01019 fs->last_clust = ncl; /* Update FSINFO */ 01020 if (fs->free_clust != 0xFFFFFFFF) { 01021 fs->free_clust--; 01022 fs->fsi_flag = 1; 01023 } 01024 } else { 01025 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; 01026 } 01027 01028 return ncl; /* Return new cluster number or error code */ 01029 } 01030 #endif /* !_FS_READONLY */ 01031 01032 01033 01034 /*-----------------------------------------------------------------------*/ 01035 /* FAT handling - Convert offset into cluster with link map table */ 01036 /*-----------------------------------------------------------------------*/ 01037 01038 #if _USE_FASTSEEK 01039 static 01040 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ 01041 FIL* fp, /* Pointer to the file object */ 01042 DWORD ofs /* File offset to be converted to cluster# */ 01043 ) 01044 { 01045 DWORD cl, ncl, *tbl; 01046 01047 01048 tbl = fp->cltbl + 1; /* Top of CLMT */ 01049 cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */ 01050 for (;;) { 01051 ncl = *tbl++; /* Number of cluters in the fragment */ 01052 if (!ncl) return 0; /* End of table? (error) */ 01053 if (cl < ncl) break; /* In this fragment? */ 01054 cl -= ncl; tbl++; /* Next fragment */ 01055 } 01056 return cl + *tbl; /* Return the cluster number */ 01057 } 01058 #endif /* _USE_FASTSEEK */ 01059 01060 01061 01062 /*-----------------------------------------------------------------------*/ 01063 /* Directory handling - Set directory index */ 01064 /*-----------------------------------------------------------------------*/ 01065 01066 static 01067 FRESULT dir_sdi ( 01068 eDIR *dj, /* Pointer to directory object */ 01069 WORD idx /* Directory index number */ 01070 ) 01071 { 01072 DWORD clst; 01073 WORD ic; 01074 01075 01076 dj->index = idx; 01077 clst = dj->sclust; 01078 if (clst == 1 || clst >= dj->fs->n_fatent) /* Check start cluster range */ 01079 return FR_INT_ERR; 01080 if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ 01081 clst = dj->fs->dirbase; 01082 01083 if (clst == 0) { /* Static table (root-dir in FAT12/16) */ 01084 dj->clust = clst; 01085 if (idx >= dj->fs->n_rootdir) /* Index is out of range */ 01086 return FR_INT_ERR; 01087 dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */ 01088 } 01089 else { /* Dynamic table (sub-dirs or root-dir in FAT32) */ 01090 ic = SS(dj->fs) / SZ_DIR * dj->fs->csize; /* Entries per cluster */ 01091 while (idx >= ic) { /* Follow cluster chain */ 01092 clst = get_fat(dj->fs, clst); /* Get next cluster */ 01093 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 01094 if (clst < 2 || clst >= dj->fs->n_fatent) /* Reached to end of table or int error */ 01095 return FR_INT_ERR; 01096 idx -= ic; 01097 } 01098 dj->clust = clst; 01099 dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */ 01100 } 01101 01102 dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */ 01103 01104 return FR_OK; /* Seek succeeded */ 01105 } 01106 01107 01108 01109 01110 /*-----------------------------------------------------------------------*/ 01111 /* Directory handling - Move directory index next */ 01112 /*-----------------------------------------------------------------------*/ 01113 01114 static 01115 FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */ 01116 eDIR *dj, /* Pointer to directory object */ 01117 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ 01118 ) 01119 { 01120 DWORD clst; 01121 WORD i; 01122 01123 01124 stretch = stretch; /* To suppress warning on read-only cfg. */ 01125 i = dj->index + 1; 01126 if (!i || !dj->sect) /* Report EOT when index has reached 65535 */ 01127 return FR_NO_FILE; 01128 01129 if (!(i % (SS(dj->fs) / SZ_DIR))) { /* Sector changed? */ 01130 dj->sect++; /* Next sector */ 01131 01132 if (dj->clust == 0) { /* Static table */ 01133 if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */ 01134 return FR_NO_FILE; 01135 } 01136 else { /* Dynamic table */ 01137 if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */ 01138 clst = get_fat(dj->fs, dj->clust); /* Get next cluster */ 01139 if (clst <= 1) return FR_INT_ERR; 01140 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 01141 if (clst >= dj->fs->n_fatent) { /* When it reached end of dynamic table */ 01142 #if !_FS_READONLY 01143 BYTE c; 01144 if (!stretch) return FR_NO_FILE; /* When do not stretch, report EOT */ 01145 clst = create_chain(dj->fs, dj->clust); /* Stretch cluster chain */ 01146 if (clst == 0) return FR_DENIED; /* No free cluster */ 01147 if (clst == 1) return FR_INT_ERR; 01148 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 01149 /* Clean-up stretched table */ 01150 if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */ 01151 mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */ 01152 dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */ 01153 for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */ 01154 dj->fs->wflag = 1; 01155 if (move_window(dj->fs, 0)) return FR_DISK_ERR; 01156 dj->fs->winsect++; 01157 } 01158 dj->fs->winsect -= c; /* Rewind window address */ 01159 #else 01160 return FR_NO_FILE; /* Report EOT */ 01161 #endif 01162 } 01163 dj->clust = clst; /* Initialize data for new cluster */ 01164 dj->sect = clust2sect(dj->fs, clst); 01165 } 01166 } 01167 } 01168 01169 dj->index = i; 01170 dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; 01171 01172 return FR_OK; 01173 } 01174 01175 01176 01177 01178 /*-----------------------------------------------------------------------*/ 01179 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */ 01180 /*-----------------------------------------------------------------------*/ 01181 #if _USE_LFN 01182 static 01183 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */ 01184 01185 01186 static 01187 int cmp_lfn ( /* 1:Matched, 0:Not matched */ 01188 WCHAR *lfnbuf, /* Pointer to the LFN to be compared */ 01189 BYTE *dir /* Pointer to the directory entry containing a part of LFN */ 01190 ) 01191 { 01192 UINT i, s; 01193 WCHAR wc, uc; 01194 01195 01196 i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13; /* Get offset in the LFN buffer */ 01197 s = 0; wc = 1; 01198 do { 01199 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ 01200 if (wc) { /* Last char has not been processed */ 01201 wc = ff_wtoupper(uc); /* Convert it to upper case */ 01202 if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */ 01203 return 0; /* Not matched */ 01204 } else { 01205 if (uc != 0xFFFF) return 0; /* Check filler */ 01206 } 01207 } while (++s < 13); /* Repeat until all chars in the entry are checked */ 01208 01209 if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i]) /* Last segment matched but different length */ 01210 return 0; 01211 01212 return 1; /* The part of LFN matched */ 01213 } 01214 01215 01216 01217 static 01218 int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */ 01219 WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */ 01220 BYTE *dir /* Pointer to the directory entry */ 01221 ) 01222 { 01223 UINT i, s; 01224 WCHAR wc, uc; 01225 01226 01227 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 01228 01229 s = 0; wc = 1; 01230 do { 01231 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ 01232 if (wc) { /* Last char has not been processed */ 01233 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 01234 lfnbuf[i++] = wc = uc; /* Store it */ 01235 } else { 01236 if (uc != 0xFFFF) return 0; /* Check filler */ 01237 } 01238 } while (++s < 13); /* Read all character in the entry */ 01239 01240 if (dir[LDIR_Ord] & LLE) { /* Put terminator if it is the last LFN part */ 01241 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 01242 lfnbuf[i] = 0; 01243 } 01244 01245 return 1; 01246 } 01247 01248 01249 #if !_FS_READONLY 01250 static 01251 void fit_lfn ( 01252 const WCHAR *lfnbuf, /* Pointer to the LFN buffer */ 01253 BYTE *dir, /* Pointer to the directory entry */ 01254 BYTE ord, /* LFN order (1-20) */ 01255 BYTE sum /* SFN sum */ 01256 ) 01257 { 01258 UINT i, s; 01259 WCHAR wc; 01260 01261 01262 dir[LDIR_Chksum] = sum; /* Set check sum */ 01263 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ 01264 dir[LDIR_Type] = 0; 01265 ST_WORD(dir+LDIR_FstClusLO, 0); 01266 01267 i = (ord - 1) * 13; /* Get offset in the LFN buffer */ 01268 s = wc = 0; 01269 do { 01270 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */ 01271 ST_WORD(dir+LfnOfs[s], wc); /* Put it */ 01272 if (!wc) wc = 0xFFFF; /* Padding chars following last char */ 01273 } while (++s < 13); 01274 if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE; /* Bottom LFN part is the start of LFN sequence */ 01275 dir[LDIR_Ord] = ord; /* Set the LFN order */ 01276 } 01277 01278 #endif 01279 #endif 01280 01281 01282 01283 /*-----------------------------------------------------------------------*/ 01284 /* Create numbered name */ 01285 /*-----------------------------------------------------------------------*/ 01286 #if _USE_LFN 01287 void gen_numname ( 01288 BYTE *dst, /* Pointer to generated SFN */ 01289 const BYTE *src, /* Pointer to source SFN to be modified */ 01290 const WCHAR *lfn, /* Pointer to LFN */ 01291 WORD seq /* Sequence number */ 01292 ) 01293 { 01294 BYTE ns[8], c; 01295 UINT i, j; 01296 01297 01298 mem_cpy(dst, src, 11); 01299 01300 if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */ 01301 do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; while (*lfn); 01302 } 01303 01304 /* itoa (hexdecimal) */ 01305 i = 7; 01306 do { 01307 c = (seq % 16) + '0'; 01308 if (c > '9') c += 7; 01309 ns[i--] = c; 01310 seq /= 16; 01311 } while (seq); 01312 ns[i] = '~'; 01313 01314 /* Append the number */ 01315 for (j = 0; j < i && dst[j] != ' '; j++) { 01316 if (IsDBCS1(dst[j])) { 01317 if (j == i - 1) break; 01318 j++; 01319 } 01320 } 01321 do { 01322 dst[j++] = (i < 8) ? ns[i++] : ' '; 01323 } while (j < 8); 01324 } 01325 #endif 01326 01327 01328 01329 01330 /*-----------------------------------------------------------------------*/ 01331 /* Calculate sum of an SFN */ 01332 /*-----------------------------------------------------------------------*/ 01333 #if _USE_LFN 01334 static 01335 BYTE sum_sfn ( 01336 const BYTE *dir /* Ptr to directory entry */ 01337 ) 01338 { 01339 BYTE sum = 0; 01340 UINT n = 11; 01341 01342 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n); 01343 return sum; 01344 } 01345 #endif 01346 01347 01348 01349 01350 /*-----------------------------------------------------------------------*/ 01351 /* Directory handling - Find an object in the directory */ 01352 /*-----------------------------------------------------------------------*/ 01353 01354 static 01355 FRESULT dir_find ( 01356 eDIR *dj /* Pointer to the directory object linked to the file name */ 01357 ) 01358 { 01359 FRESULT res; 01360 BYTE c, *dir; 01361 #if _USE_LFN 01362 BYTE a, ord, sum; 01363 #endif 01364 01365 res = dir_sdi(dj, 0); /* Rewind directory object */ 01366 if (res != FR_OK) return res; 01367 01368 #if _USE_LFN 01369 ord = sum = 0xFF; 01370 #endif 01371 do { 01372 res = move_window(dj->fs, dj->sect); 01373 if (res != FR_OK) break; 01374 dir = dj->dir; /* Ptr to the directory entry of current index */ 01375 c = dir[DIR_Name]; 01376 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 01377 #if _USE_LFN /* LFN configuration */ 01378 a = dir[DIR_Attr] & AM_MASK; 01379 if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 01380 ord = 0xFF; 01381 } else { 01382 if (a == AM_LFN) { /* An LFN entry is found */ 01383 if (dj->lfn) { 01384 if (c & LLE) { /* Is it start of LFN sequence? */ 01385 sum = dir[LDIR_Chksum]; 01386 c &= ~LLE; ord = c; /* LFN start order */ 01387 dj->lfn_idx = dj->index; 01388 } 01389 /* Check validity of the LFN entry and compare it with given name */ 01390 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; 01391 } 01392 } else { /* An SFN entry is found */ 01393 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */ 01394 ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */ 01395 if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */ 01396 } 01397 } 01398 #else /* Non LFN configuration */ 01399 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */ 01400 break; 01401 #endif 01402 res = dir_next(dj, 0); /* Next entry */ 01403 } while (res == FR_OK); 01404 01405 return res; 01406 } 01407 01408 01409 01410 01411 /*-----------------------------------------------------------------------*/ 01412 /* Read an object from the directory */ 01413 /*-----------------------------------------------------------------------*/ 01414 #if _FS_MINIMIZE <= 1 01415 static 01416 FRESULT dir_read ( 01417 eDIR *dj /* Pointer to the directory object that pointing the entry to be read */ 01418 ) 01419 { 01420 FRESULT res; 01421 BYTE c, *dir; 01422 #if _USE_LFN 01423 BYTE a, ord = 0xFF, sum = 0xFF; 01424 #endif 01425 01426 res = FR_NO_FILE; 01427 while (dj->sect) { 01428 res = move_window(dj->fs, dj->sect); 01429 if (res != FR_OK) break; 01430 dir = dj->dir; /* Ptr to the directory entry of current index */ 01431 c = dir[DIR_Name]; 01432 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 01433 #if _USE_LFN /* LFN configuration */ 01434 a = dir[DIR_Attr] & AM_MASK; 01435 if (c == DDE || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 01436 ord = 0xFF; 01437 } else { 01438 if (a == AM_LFN) { /* An LFN entry is found */ 01439 if (c & LLE) { /* Is it start of LFN sequence? */ 01440 sum = dir[LDIR_Chksum]; 01441 c &= ~LLE; ord = c; 01442 dj->lfn_idx = dj->index; 01443 } 01444 /* Check LFN validity and capture it */ 01445 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF; 01446 } else { /* An SFN entry is found */ 01447 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */ 01448 dj->lfn_idx = 0xFFFF; /* It has no LFN. */ 01449 break; 01450 } 01451 } 01452 #else /* Non LFN configuration */ 01453 if (c != DDE && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */ 01454 break; 01455 #endif 01456 res = dir_next(dj, 0); /* Next entry */ 01457 if (res != FR_OK) break; 01458 } 01459 01460 if (res != FR_OK) dj->sect = 0; 01461 01462 return res; 01463 } 01464 #endif 01465 01466 01467 01468 /*-----------------------------------------------------------------------*/ 01469 /* Register an object to the directory */ 01470 /*-----------------------------------------------------------------------*/ 01471 #if !_FS_READONLY 01472 static 01473 FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */ 01474 eDIR *dj /* Target directory with object name to be created */ 01475 ) 01476 { 01477 FRESULT res; 01478 BYTE c, *dir; 01479 #if _USE_LFN /* LFN configuration */ 01480 WORD n, ne, is; 01481 BYTE sn[12], *fn, sum; 01482 WCHAR *lfn; 01483 01484 01485 fn = dj->fn; lfn = dj->lfn; 01486 mem_cpy(sn, fn, 12); 01487 01488 if (_FS_RPATH && (sn[NS] & NS_DOT)) /* Cannot create dot entry */ 01489 return FR_INVALID_NAME; 01490 01491 if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ 01492 fn[NS] = 0; dj->lfn = 0; /* Find only SFN */ 01493 for (n = 1; n < 100; n++) { 01494 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */ 01495 res = dir_find(dj); /* Check if the name collides with existing SFN */ 01496 if (res != FR_OK) break; 01497 } 01498 if (n == 100) return FR_DENIED; /* Abort if too many collisions */ 01499 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ 01500 fn[NS] = sn[NS]; dj->lfn = lfn; 01501 } 01502 01503 if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve an SFN + LFN entries. */ 01504 for (ne = 0; lfn[ne]; ne++) ; 01505 ne = (ne + 25) / 13; 01506 } else { /* Otherwise reserve only an SFN entry. */ 01507 ne = 1; 01508 } 01509 01510 /* Reserve contiguous entries */ 01511 res = dir_sdi(dj, 0); 01512 if (res != FR_OK) return res; 01513 n = is = 0; 01514 do { 01515 res = move_window(dj->fs, dj->sect); 01516 if (res != FR_OK) break; 01517 c = *dj->dir; /* Check the entry status */ 01518 if (c == DDE || c == 0) { /* Is it a blank entry? */ 01519 if (n == 0) is = dj->index; /* First index of the contiguous entry */ 01520 if (++n == ne) break; /* A contiguous entry that required count is found */ 01521 } else { 01522 n = 0; /* Not a blank entry. Restart to search */ 01523 } 01524 res = dir_next(dj, 1); /* Next entry with table stretch */ 01525 } while (res == FR_OK); 01526 01527 if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */ 01528 res = dir_sdi(dj, is); 01529 if (res == FR_OK) { 01530 sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */ 01531 ne--; 01532 do { /* Store LFN entries in bottom first */ 01533 res = move_window(dj->fs, dj->sect); 01534 if (res != FR_OK) break; 01535 fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum); 01536 dj->fs->wflag = 1; 01537 res = dir_next(dj, 0); /* Next entry */ 01538 } while (res == FR_OK && --ne); 01539 } 01540 } 01541 01542 #else /* Non LFN configuration */ 01543 res = dir_sdi(dj, 0); 01544 if (res == FR_OK) { 01545 do { /* Find a blank entry for the SFN */ 01546 res = move_window(dj->fs, dj->sect); 01547 if (res != FR_OK) break; 01548 c = *dj->dir; 01549 if (c == DDE || c == 0) break; /* Is it a blank entry? */ 01550 res = dir_next(dj, 1); /* Next entry with table stretch */ 01551 } while (res == FR_OK); 01552 } 01553 #endif 01554 01555 if (res == FR_OK) { /* Initialize the SFN entry */ 01556 res = move_window(dj->fs, dj->sect); 01557 if (res == FR_OK) { 01558 dir = dj->dir; 01559 mem_set(dir, 0, SZ_DIR); /* Clean the entry */ 01560 mem_cpy(dir, dj->fn, 11); /* Put SFN */ 01561 #if _USE_LFN 01562 dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */ 01563 #endif 01564 dj->fs->wflag = 1; 01565 } 01566 } 01567 01568 return res; 01569 } 01570 #endif /* !_FS_READONLY */ 01571 01572 01573 01574 01575 /*-----------------------------------------------------------------------*/ 01576 /* Remove an object from the directory */ 01577 /*-----------------------------------------------------------------------*/ 01578 #if !_FS_READONLY && !_FS_MINIMIZE 01579 static 01580 FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */ 01581 eDIR *dj /* Directory object pointing the entry to be removed */ 01582 ) 01583 { 01584 FRESULT res; 01585 #if _USE_LFN /* LFN configuration */ 01586 WORD i; 01587 01588 i = dj->index; /* SFN index */ 01589 res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */ 01590 if (res == FR_OK) { 01591 do { 01592 res = move_window(dj->fs, dj->sect); 01593 if (res != FR_OK) break; 01594 *dj->dir = DDE; /* Mark the entry "deleted" */ 01595 dj->fs->wflag = 1; 01596 if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */ 01597 res = dir_next(dj, 0); /* Next entry */ 01598 } while (res == FR_OK); 01599 if (res == FR_NO_FILE) res = FR_INT_ERR; 01600 } 01601 01602 #else /* Non LFN configuration */ 01603 res = dir_sdi(dj, dj->index); 01604 if (res == FR_OK) { 01605 res = move_window(dj->fs, dj->sect); 01606 if (res == FR_OK) { 01607 *dj->dir = DDE; /* Mark the entry "deleted" */ 01608 dj->fs->wflag = 1; 01609 } 01610 } 01611 #endif 01612 01613 return res; 01614 } 01615 #endif /* !_FS_READONLY */ 01616 01617 01618 01619 01620 /*-----------------------------------------------------------------------*/ 01621 /* Pick a segment and create the object name in directory form */ 01622 /*-----------------------------------------------------------------------*/ 01623 01624 static 01625 FRESULT create_name ( 01626 eDIR *dj, /* Pointer to the directory object */ 01627 const TCHAR **path /* Pointer to pointer to the segment in the path string */ 01628 ) 01629 { 01630 #ifdef _EXCVT 01631 static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */ 01632 #endif 01633 01634 #if _USE_LFN /* LFN configuration */ 01635 BYTE b, cf; 01636 WCHAR w, *lfn; 01637 UINT i, ni, si, di; 01638 const TCHAR *p; 01639 01640 /* Create LFN in Unicode */ 01641 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ 01642 lfn = dj->lfn; 01643 si = di = 0; 01644 for (;;) { 01645 w = p[si++]; /* Get a character */ 01646 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */ 01647 if (di >= _MAX_LFN) /* Reject too long name */ 01648 return FR_INVALID_NAME; 01649 #if !_LFN_UNICODE 01650 w &= 0xFF; 01651 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ 01652 b = (BYTE)p[si++]; /* Get 2nd byte */ 01653 if (!IsDBCS2(b)) 01654 return FR_INVALID_NAME; /* Reject invalid sequence */ 01655 w = (w << 8) + b; /* Create a DBC */ 01656 } 01657 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */ 01658 if (!w) return FR_INVALID_NAME; /* Reject invalid code */ 01659 #endif 01660 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */ 01661 return FR_INVALID_NAME; 01662 lfn[di++] = w; /* Store the Unicode char */ 01663 } 01664 *path = &p[si]; /* Return pointer to the next segment */ 01665 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 01666 #if _FS_RPATH 01667 if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */ 01668 (di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) { 01669 lfn[di] = 0; 01670 for (i = 0; i < 11; i++) 01671 dj->fn[i] = (i < di) ? '.' : ' '; 01672 dj->fn[i] = cf | NS_DOT; /* This is a dot entry */ 01673 return FR_OK; 01674 } 01675 #endif 01676 while (di) { /* Strip trailing spaces and dots */ 01677 w = lfn[di-1]; 01678 if (w != ' ' && w != '.') break; 01679 di--; 01680 } 01681 if (!di) return FR_INVALID_NAME; /* Reject nul string */ 01682 01683 lfn[di] = 0; /* LFN is created */ 01684 01685 /* Create SFN in directory form */ 01686 mem_set(dj->fn, ' ', 11); 01687 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */ 01688 if (si) cf |= NS_LOSS | NS_LFN; 01689 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */ 01690 01691 b = i = 0; ni = 8; 01692 for (;;) { 01693 w = lfn[si++]; /* Get an LFN char */ 01694 if (!w) break; /* Break on end of the LFN */ 01695 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */ 01696 cf |= NS_LOSS | NS_LFN; continue; 01697 } 01698 01699 if (i >= ni || si == di) { /* Extension or end of SFN */ 01700 if (ni == 11) { /* Long extension */ 01701 cf |= NS_LOSS | NS_LFN; break; 01702 } 01703 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */ 01704 if (si > di) break; /* No extension */ 01705 si = di; i = 8; ni = 11; /* Enter extension section */ 01706 b <<= 2; continue; 01707 } 01708 01709 if (w >= 0x80) { /* Non ASCII char */ 01710 #ifdef _EXCVT 01711 w = ff_convert(w, 0); /* Unicode -> OEM code */ 01712 if (w) w = excvt[w - 0x80]; /* Convert extended char to upper (SBCS) */ 01713 #else 01714 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */ 01715 #endif 01716 cf |= NS_LFN; /* Force create LFN entry */ 01717 } 01718 01719 if (_DF1S && w >= 0x100) { /* Double byte char (always false on SBCS cfg) */ 01720 if (i >= ni - 1) { 01721 cf |= NS_LOSS | NS_LFN; i = ni; continue; 01722 } 01723 dj->fn[i++] = (BYTE)(w >> 8); 01724 } else { /* Single byte char */ 01725 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal chars for SFN */ 01726 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ 01727 } else { 01728 if (IsUpper(w)) { /* ASCII large capital */ 01729 b |= 2; 01730 } else { 01731 if (IsLower(w)) { /* ASCII small capital */ 01732 b |= 1; w -= 0x20; 01733 } 01734 } 01735 } 01736 } 01737 dj->fn[i++] = (BYTE)w; 01738 } 01739 01740 if (dj->fn[0] == DDE) dj->fn[0] = NDDE; /* If the first char collides with deleted mark, replace it with 0x05 */ 01741 01742 if (ni == 8) b <<= 2; 01743 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */ 01744 cf |= NS_LFN; 01745 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */ 01746 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */ 01747 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */ 01748 } 01749 01750 dj->fn[NS] = cf; /* SFN is created */ 01751 01752 return FR_OK; 01753 01754 01755 #else /* Non-LFN configuration */ 01756 BYTE b, c, d, *sfn; 01757 UINT ni, si, i; 01758 const char *p; 01759 01760 /* Create file name in directory form */ 01761 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ 01762 sfn = dj->fn; 01763 mem_set(sfn, ' ', 11); 01764 si = i = b = 0; ni = 8; 01765 #if _FS_RPATH 01766 if (p[si] == '.') { /* Is this a dot entry? */ 01767 for (;;) { 01768 c = (BYTE)p[si++]; 01769 if (c != '.' || si >= 3) break; 01770 sfn[i++] = c; 01771 } 01772 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; 01773 *path = &p[si]; /* Return pointer to the next segment */ 01774 sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */ 01775 return FR_OK; 01776 } 01777 #endif 01778 for (;;) { 01779 c = (BYTE)p[si++]; 01780 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */ 01781 if (c == '.' || i >= ni) { 01782 if (ni != 8 || c != '.') return FR_INVALID_NAME; 01783 i = 8; ni = 11; 01784 b <<= 2; continue; 01785 } 01786 if (c >= 0x80) { /* Extended char? */ 01787 b |= 3; /* Eliminate NT flag */ 01788 #ifdef _EXCVT 01789 c = excvt[c-0x80]; /* Upper conversion (SBCS) */ 01790 #else 01791 #if !_DF1S /* ASCII only cfg */ 01792 return FR_INVALID_NAME; 01793 #endif 01794 #endif 01795 } 01796 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ 01797 d = (BYTE)p[si++]; /* Get 2nd byte */ 01798 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */ 01799 return FR_INVALID_NAME; 01800 sfn[i++] = c; 01801 sfn[i++] = d; 01802 } else { /* Single byte code */ 01803 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */ 01804 return FR_INVALID_NAME; 01805 if (IsUpper(c)) { /* ASCII large capital? */ 01806 b |= 2; 01807 } else { 01808 if (IsLower(c)) { /* ASCII small capital? */ 01809 b |= 1; c -= 0x20; 01810 } 01811 } 01812 sfn[i++] = c; 01813 } 01814 } 01815 *path = &p[si]; /* Return pointer to the next segment */ 01816 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 01817 01818 if (!i) return FR_INVALID_NAME; /* Reject nul string */ 01819 if (sfn[0] == DDE) sfn[0] = NDDE; /* When first char collides with DDE, replace it with 0x05 */ 01820 01821 if (ni == 8) b <<= 2; 01822 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */ 01823 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */ 01824 01825 sfn[NS] = c; /* Store NT flag, File name is created */ 01826 01827 return FR_OK; 01828 #endif 01829 } 01830 01831 01832 01833 01834 /*-----------------------------------------------------------------------*/ 01835 /* Get file information from directory entry */ 01836 /*-----------------------------------------------------------------------*/ 01837 #if _FS_MINIMIZE <= 1 01838 static 01839 void get_fileinfo ( /* No return code */ 01840 eDIR *dj, /* Pointer to the directory object */ 01841 FILINFO *fno /* Pointer to the file information to be filled */ 01842 ) 01843 { 01844 UINT i; 01845 BYTE nt, *dir; 01846 TCHAR *p, c; 01847 01848 01849 p = fno->fname; 01850 if (dj->sect) { 01851 dir = dj->dir; 01852 nt = dir[DIR_NTres]; /* NT flag */ 01853 for (i = 0; i < 8; i++) { /* Copy name body */ 01854 c = dir[i]; 01855 if (c == ' ') break; 01856 if (c == NDDE) c = (TCHAR)DDE; 01857 if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20; 01858 #if _LFN_UNICODE 01859 if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1])) 01860 c = (c << 8) | dir[++i]; 01861 c = ff_convert(c, 1); 01862 if (!c) c = '?'; 01863 #endif 01864 *p++ = c; 01865 } 01866 if (dir[8] != ' ') { /* Copy name extension */ 01867 *p++ = '.'; 01868 for (i = 8; i < 11; i++) { 01869 c = dir[i]; 01870 if (c == ' ') break; 01871 if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20; 01872 #if _LFN_UNICODE 01873 if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1])) 01874 c = (c << 8) | dir[++i]; 01875 c = ff_convert(c, 1); 01876 if (!c) c = '?'; 01877 #endif 01878 *p++ = c; 01879 } 01880 } 01881 fno->fattrib = dir[DIR_Attr]; /* Attribute */ 01882 fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */ 01883 fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */ 01884 fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */ 01885 } 01886 *p = 0; /* Terminate SFN str by a \0 */ 01887 01888 #if _USE_LFN 01889 if (fno->lfname && fno->lfsize) { 01890 TCHAR *tp = fno->lfname; 01891 WCHAR w, *lfn; 01892 01893 i = 0; 01894 if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */ 01895 lfn = dj->lfn; 01896 while ((w = *lfn++) != 0) { /* Get an LFN char */ 01897 #if !_LFN_UNICODE 01898 w = ff_convert(w, 0); /* Unicode -> OEM conversion */ 01899 if (!w) { i = 0; break; } /* Could not convert, no LFN */ 01900 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */ 01901 tp[i++] = (TCHAR)(w >> 8); 01902 #endif 01903 if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overflow, no LFN */ 01904 tp[i++] = (TCHAR)w; 01905 } 01906 } 01907 tp[i] = 0; /* Terminate the LFN str by a \0 */ 01908 } 01909 #endif 01910 } 01911 #endif /* _FS_MINIMIZE <= 1 */ 01912 01913 01914 01915 01916 /*-----------------------------------------------------------------------*/ 01917 /* Follow a file path */ 01918 /*-----------------------------------------------------------------------*/ 01919 01920 static 01921 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ 01922 eDIR *dj, /* Directory object to return last directory and found object */ 01923 const TCHAR *path /* Full-path string to find a file or directory */ 01924 ) 01925 { 01926 FRESULT res; 01927 BYTE *dir, ns; 01928 01929 01930 #if _FS_RPATH 01931 if (*path == '/' || *path == '\\') { /* There is a heading separator */ 01932 path++; dj->sclust = 0; /* Strip it and start from the root dir */ 01933 } else { /* No heading separator */ 01934 dj->sclust = dj->fs->cdir; /* Start from the current dir */ 01935 } 01936 #else 01937 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */ 01938 path++; 01939 dj->sclust = 0; /* Start from the root dir */ 01940 #endif 01941 01942 if ((UINT)*path < ' ') { /* Nul path means the start directory itself */ 01943 res = dir_sdi(dj, 0); 01944 dj->dir = 0; 01945 01946 } else { /* Follow path */ 01947 for (;;) { 01948 res = create_name(dj, &path); /* Get a segment */ 01949 if (res != FR_OK) break; 01950 res = dir_find(dj); /* Find it */ 01951 ns = *(dj->fn+NS); 01952 if (res != FR_OK) { /* Failed to find the object */ 01953 if (res != FR_NO_FILE) break; /* Abort if any hard error occured */ 01954 /* Object not found */ 01955 if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exit */ 01956 dj->sclust = 0; dj->dir = 0; /* It is the root dir */ 01957 res = FR_OK; 01958 if (!(ns & NS_LAST)) continue; 01959 } else { /* Could not find the object */ 01960 if (!(ns & NS_LAST)) res = FR_NO_PATH; 01961 } 01962 break; 01963 } 01964 if (ns & NS_LAST) break; /* Last segment match. Function completed. */ 01965 dir = dj->dir; /* There is next segment. Follow the sub directory */ 01966 if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */ 01967 res = FR_NO_PATH; break; 01968 } 01969 dj->sclust = LD_CLUST(dir); 01970 } 01971 } 01972 01973 return res; 01974 } 01975 01976 01977 01978 01979 /*-----------------------------------------------------------------------*/ 01980 /* Load a sector and check if it is an FAT Volume Boot Record */ 01981 /*-----------------------------------------------------------------------*/ 01982 01983 static 01984 BYTE check_fs ( /* 0:FAT-VBR, 1:Valid BR but not FAT, 2:Not a BR, 3:Disk error */ 01985 FATFS *fs, /* File system object */ 01986 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ 01987 ) 01988 { 01989 if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK) /* Load boot record */ 01990 return 3; 01991 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */ 01992 return 2; 01993 01994 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ 01995 return 0; 01996 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) 01997 return 0; 01998 01999 return 1; 02000 } 02001 02002 02003 02004 02005 /*-----------------------------------------------------------------------*/ 02006 /* Check if the file system object is valid or not */ 02007 /*-----------------------------------------------------------------------*/ 02008 02009 static 02010 FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occurred */ 02011 const TCHAR **path, /* Pointer to pointer to the path name (drive number) */ 02012 FATFS **rfs, /* Pointer to pointer to the found file system object */ 02013 BYTE chk_wp /* !=0: Check media write protection for write access */ 02014 ) 02015 { 02016 BYTE fmt, b, pi, *tbl; 02017 UINT vol; 02018 DSTATUS stat; 02019 DWORD bsect, fasize, tsect, sysect, nclst, szbfat; 02020 WORD nrsv; 02021 const TCHAR *p = *path; 02022 FATFS *fs; 02023 02024 /* Get logical drive number from the path name */ 02025 vol = p[0] - '0'; /* Is there a drive number? */ 02026 if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */ 02027 p += 2; *path = p; /* Return pointer to the path name */ 02028 } else { /* No drive number is given */ 02029 #if _FS_RPATH 02030 vol = CurrVol; /* Use current drive */ 02031 #else 02032 vol = 0; /* Use drive 0 */ 02033 #endif 02034 } 02035 02036 /* Check if the file system object is valid or not */ 02037 if (vol >= _VOLUMES) /* Is the drive number valid? */ 02038 return FR_INVALID_DRIVE; 02039 *rfs = fs = FatFs[vol]; /* Return pointer to the corresponding file system object */ 02040 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */ 02041 02042 ENTER_FF(fs); /* Lock file system */ 02043 02044 if (fs->fs_type) { /* If the logical drive has been mounted */ 02045 stat = disk_status(fs->drv); 02046 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */ 02047 if (!_FS_READONLY && chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */ 02048 return FR_WRITE_PROTECTED; 02049 return FR_OK; /* The file system object is valid */ 02050 } 02051 } 02052 02053 /* The file system object is not valid. */ 02054 /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */ 02055 02056 fs->fs_type = 0; /* Clear the file system object */ 02057 fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */ 02058 stat = disk_initialize(fs->drv); /* Initialize low level disk I/O layer */ 02059 if (stat & STA_NOINIT) /* Check if the initialization succeeded */ 02060 return FR_NOT_READY; /* Failed to initialize due to no media or hard error */ 02061 if (!_FS_READONLY && chk_wp && (stat & STA_PROTECT)) /* Check disk write protection if needed */ 02062 return FR_WRITE_PROTECTED; 02063 #if _MAX_SS != 512 /* Get disk sector size (variable sector size cfg only) */ 02064 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK) 02065 return FR_DISK_ERR; 02066 #endif 02067 /* Search FAT partition on the drive. Supports only generic partitionings, FDISK and SFD. */ 02068 fmt = check_fs(fs, bsect = 0); /* Load sector 0 and check if it is an FAT-VBR (in SFD) */ 02069 if (LD2PT(vol) && !fmt) fmt = 1; /* Force non-SFD if the volume is forced partition */ 02070 if (fmt == 1) { /* Not an FAT-VBR, the physical drive can be partitioned */ 02071 /* Check the partition listed in the partition table */ 02072 pi = LD2PT(vol); 02073 if (pi) pi--; 02074 tbl = &fs->win[MBR_Table + pi * SZ_PTE];/* Partition table */ 02075 if (tbl[4]) { /* Is the partition existing? */ 02076 bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */ 02077 fmt = check_fs(fs, bsect); /* Check the partition */ 02078 } 02079 } 02080 if (fmt == 3) return FR_DISK_ERR; 02081 if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */ 02082 02083 /* An FAT volume is found. Following code initializes the file system object */ 02084 02085 if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */ 02086 return FR_NO_FILESYSTEM; 02087 02088 fasize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */ 02089 if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32); 02090 fs->fsize = fasize; 02091 02092 fs->n_fats = b = fs->win[BPB_NumFATs]; /* Number of FAT copies */ 02093 if (b != 1 && b != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */ 02094 fasize *= b; /* Number of sectors for FAT area */ 02095 02096 fs->csize = b = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */ 02097 if (!b || (b & (b - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */ 02098 02099 fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Number of root directory entries */ 02100 if (fs->n_rootdir % (SS(fs) / SZ_DIR)) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */ 02101 02102 tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */ 02103 if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32); 02104 02105 nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); /* Number of reserved sectors */ 02106 if (!nrsv) return FR_NO_FILESYSTEM; /* (BPB_RsvdSecCnt must not be 0) */ 02107 02108 /* Determine the FAT sub type */ 02109 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); /* RSV+FAT+DIR */ 02110 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 02111 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ 02112 if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 02113 fmt = FS_FAT12; 02114 if (nclst >= MIN_FAT16) fmt = FS_FAT16; 02115 if (nclst >= MIN_FAT32) fmt = FS_FAT32; 02116 02117 /* Boundaries and Limits */ 02118 fs->n_fatent = nclst + 2; /* Number of FAT entries */ 02119 fs->database = bsect + sysect; /* Data start sector */ 02120 fs->fatbase = bsect + nrsv; /* FAT start sector */ 02121 if (fmt == FS_FAT32) { 02122 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ 02123 fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */ 02124 szbfat = fs->n_fatent * 4; /* (Required FAT size) */ 02125 } else { 02126 if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */ 02127 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ 02128 szbfat = (fmt == FS_FAT16) ? /* (Required FAT size) */ 02129 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); 02130 } 02131 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than required) */ 02132 return FR_NO_FILESYSTEM; 02133 02134 #if !_FS_READONLY 02135 /* Initialize cluster allocation information */ 02136 fs->free_clust = 0xFFFFFFFF; 02137 fs->last_clust = 0; 02138 02139 /* Get fsinfo if available */ 02140 if (fmt == FS_FAT32) { 02141 fs->fsi_flag = 0; 02142 fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo); 02143 if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK && 02144 LD_WORD(fs->win+BS_55AA) == 0xAA55 && 02145 LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 && 02146 LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) { 02147 fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free); 02148 fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count); 02149 } 02150 } 02151 #endif 02152 fs->fs_type = fmt; /* FAT sub-type */ 02153 fs->id = ++Fsid; /* File system mount ID */ 02154 fs->winsect = 0; /* Invalidate sector cache */ 02155 fs->wflag = 0; 02156 #if _FS_RPATH 02157 fs->cdir = 0; /* Current directory (root dir) */ 02158 #endif 02159 #if _FS_SHARE /* Clear file lock semaphores */ 02160 clear_lock(fs); 02161 #endif 02162 02163 return FR_OK; 02164 } 02165 02166 02167 02168 02169 /*-----------------------------------------------------------------------*/ 02170 /* Check if the file/dir object is valid or not */ 02171 /*-----------------------------------------------------------------------*/ 02172 02173 static 02174 FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */ 02175 FATFS *fs, /* Pointer to the file system object */ 02176 WORD id /* Member id of the target object to be checked */ 02177 ) 02178 { 02179 if (!fs || !fs->fs_type || fs->id != id) 02180 return FR_INVALID_OBJECT; 02181 02182 ENTER_FF(fs); /* Lock file system */ 02183 02184 if (disk_status(fs->drv) & STA_NOINIT) 02185 return FR_NOT_READY; 02186 02187 return FR_OK; 02188 } 02189 02190 02191 02192 02193 /*-------------------------------------------------------------------------- 02194 02195 Public Functions 02196 02197 --------------------------------------------------------------------------*/ 02198 02199 02200 02201 /*-----------------------------------------------------------------------*/ 02202 /* Mount/Unmount a Logical Drive */ 02203 /*-----------------------------------------------------------------------*/ 02204 02205 FRESULT f_mount ( 02206 BYTE vol, /* Logical drive number to be mounted/unmounted */ 02207 FATFS *fs /* Pointer to new file system object (NULL for unmount)*/ 02208 ) 02209 { 02210 FATFS *rfs; 02211 02212 02213 if (vol >= _VOLUMES) /* Check if the drive number is valid */ 02214 return FR_INVALID_DRIVE; 02215 rfs = FatFs[vol]; /* Get current fs object */ 02216 02217 if (rfs) { 02218 #if _FS_SHARE 02219 clear_lock(rfs); 02220 #endif 02221 #if _FS_REENTRANT /* Discard sync object of the current volume */ 02222 if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR; 02223 #endif 02224 rfs->fs_type = 0; /* Clear old fs object */ 02225 } 02226 02227 if (fs) { 02228 fs->fs_type = 0; /* Clear new fs object */ 02229 #if _FS_REENTRANT /* Create sync object for the new volume */ 02230 if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR; 02231 #endif 02232 } 02233 FatFs[vol] = fs; /* Register new fs object */ 02234 02235 return FR_OK; 02236 } 02237 02238 02239 02240 02241 /*-----------------------------------------------------------------------*/ 02242 /* Open or Create a File */ 02243 /*-----------------------------------------------------------------------*/ 02244 02245 FRESULT f_open ( 02246 FIL *fp, /* Pointer to the blank file object */ 02247 const TCHAR *path, /* Pointer to the file name */ 02248 BYTE mode /* Access mode and file open mode flags */ 02249 ) 02250 { 02251 FRESULT res; 02252 eDIR dj; 02253 BYTE *dir; 02254 DEF_NAMEBUF; 02255 02256 02257 fp->fs = 0; /* Clear file object */ 02258 02259 #if !_FS_READONLY 02260 mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW; 02261 res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ)); 02262 #else 02263 mode &= FA_READ; 02264 res = chk_mounted(&path, &dj.fs, 0); 02265 #endif 02266 INIT_BUF(dj); 02267 if (res == FR_OK) 02268 res = follow_path(&dj, path); /* Follow the file path */ 02269 dir = dj.dir; 02270 02271 #if !_FS_READONLY /* R/W configuration */ 02272 if (res == FR_OK) { 02273 if (!dir) /* Current dir itself */ 02274 res = FR_INVALID_NAME; 02275 #if _FS_SHARE 02276 else 02277 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 02278 #endif 02279 } 02280 /* Create or Open a file */ 02281 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { 02282 DWORD dw, cl; 02283 02284 if (res != FR_OK) { /* No file, create new */ 02285 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */ 02286 #if _FS_SHARE 02287 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; 02288 #else 02289 res = dir_register(&dj); 02290 #endif 02291 mode |= FA_CREATE_ALWAYS; /* File is created */ 02292 dir = dj.dir; /* New entry */ 02293 } 02294 else { /* Any object is already existing */ 02295 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */ 02296 res = FR_DENIED; 02297 } else { 02298 if (mode & FA_CREATE_NEW) /* Cannot create as new file */ 02299 res = FR_EXIST; 02300 } 02301 } 02302 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */ 02303 dw = get_fattime(); /* Created time */ 02304 ST_DWORD(dir+DIR_CrtTime, dw); 02305 dir[DIR_Attr] = 0; /* Reset attribute */ 02306 ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */ 02307 cl = LD_CLUST(dir); /* Get start cluster */ 02308 ST_CLUST(dir, 0); /* cluster = 0 */ 02309 dj.fs->wflag = 1; 02310 if (cl) { /* Remove the cluster chain if exist */ 02311 dw = dj.fs->winsect; 02312 res = remove_chain(dj.fs, cl); 02313 if (res == FR_OK) { 02314 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */ 02315 res = move_window(dj.fs, dw); 02316 } 02317 } 02318 } 02319 } 02320 else { /* Open an existing file */ 02321 if (res == FR_OK) { /* Follow succeeded */ 02322 if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */ 02323 res = FR_NO_FILE; 02324 } else { 02325 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */ 02326 res = FR_DENIED; 02327 } 02328 } 02329 } 02330 if (res == FR_OK) { 02331 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */ 02332 mode |= FA__WRITTEN; 02333 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */ 02334 fp->dir_ptr = dir; 02335 #if _FS_SHARE 02336 fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 02337 if (!fp->lockid) res = FR_INT_ERR; 02338 #endif 02339 } 02340 02341 #else /* R/O configuration */ 02342 if (res == FR_OK) { /* Follow succeeded */ 02343 if (!dir) { /* Current dir itself */ 02344 res = FR_INVALID_NAME; 02345 } else { 02346 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */ 02347 res = FR_NO_FILE; 02348 } 02349 } 02350 #endif 02351 FREE_BUF(); 02352 02353 if (res == FR_OK) { 02354 fp->flag = mode; /* File access mode */ 02355 fp->sclust = LD_CLUST(dir); /* File start cluster */ 02356 fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */ 02357 fp->fptr = 0; /* File pointer */ 02358 fp->dsect = 0; 02359 #if _USE_FASTSEEK 02360 fp->cltbl = 0; /* Normal seek mode */ 02361 #endif 02362 fp->fs = dj.fs; fp->id = dj.fs->id; /* Validate file object */ 02363 } 02364 02365 LEAVE_FF(dj.fs, res); 02366 } 02367 02368 02369 02370 02371 /*-----------------------------------------------------------------------*/ 02372 /* Read File */ 02373 /*-----------------------------------------------------------------------*/ 02374 02375 FRESULT f_read ( 02376 FIL *fp, /* Pointer to the file object */ 02377 void *buff, /* Pointer to data buffer */ 02378 UINT btr, /* Number of bytes to read */ 02379 UINT *br /* Pointer to number of bytes read */ 02380 ) 02381 { 02382 FRESULT res; 02383 DWORD clst, sect, remain; 02384 UINT rcnt, cc; 02385 BYTE csect, *rbuff = (BYTE *)buff; 02386 02387 02388 *br = 0; /* Initialize byte counter */ 02389 02390 res = validate(fp->fs, fp->id); /* Check validity */ 02391 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02392 if (fp->flag & FA__ERROR) /* Aborted file? */ 02393 LEAVE_FF(fp->fs, FR_INT_ERR); 02394 if (!(fp->flag & FA_READ)) /* Check access mode */ 02395 LEAVE_FF(fp->fs, FR_DENIED); 02396 remain = fp->fsize - fp->fptr; 02397 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 02398 02399 for ( ; btr; /* Repeat until all data read */ 02400 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { 02401 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 02402 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 02403 if (!csect) { /* On the cluster boundary? */ 02404 if (fp->fptr == 0) { /* On the top of the file? */ 02405 clst = fp->sclust; /* Follow from the origin */ 02406 } else { /* Middle or end of the file */ 02407 #if _USE_FASTSEEK 02408 if (fp->cltbl) 02409 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 02410 else 02411 #endif 02412 clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */ 02413 } 02414 if (clst < 2) ABORT(fp->fs, FR_INT_ERR); 02415 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02416 fp->clust = clst; /* Update current cluster */ 02417 } 02418 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ 02419 if (!sect) ABORT(fp->fs, FR_INT_ERR); 02420 sect += csect; 02421 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */ 02422 if (cc) { /* Read maximum contiguous sectors directly */ 02423 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 02424 cc = fp->fs->csize - csect; 02425 if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK) 02426 ABORT(fp->fs, FR_DISK_ERR); 02427 #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ 02428 #if _FS_TINY 02429 if (fp->fs->wflag && fp->fs->winsect - sect < cc) 02430 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs)); 02431 #else 02432 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) 02433 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs)); 02434 #endif 02435 #endif 02436 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 02437 continue; 02438 } 02439 #if !_FS_TINY 02440 if (fp->dsect != sect) { /* Load data sector if not in cache */ 02441 #if !_FS_READONLY 02442 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 02443 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02444 ABORT(fp->fs, FR_DISK_ERR); 02445 fp->flag &= ~FA__DIRTY; 02446 } 02447 #endif 02448 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */ 02449 ABORT(fp->fs, FR_DISK_ERR); 02450 } 02451 #endif 02452 fp->dsect = sect; 02453 } 02454 rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */ 02455 if (rcnt > btr) rcnt = btr; 02456 #if _FS_TINY 02457 if (move_window(fp->fs, fp->dsect)) /* Move sector window */ 02458 ABORT(fp->fs, FR_DISK_ERR); 02459 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 02460 #else 02461 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 02462 #endif 02463 } 02464 02465 LEAVE_FF(fp->fs, FR_OK); 02466 } 02467 02468 02469 02470 02471 #if !_FS_READONLY 02472 /*-----------------------------------------------------------------------*/ 02473 /* Write File */ 02474 /*-----------------------------------------------------------------------*/ 02475 02476 FRESULT f_write ( 02477 FIL *fp, /* Pointer to the file object */ 02478 const void *buff, /* Pointer to the data to be written */ 02479 UINT btw, /* Number of bytes to write */ 02480 UINT *bw /* Pointer to number of bytes written */ 02481 ) 02482 { 02483 FRESULT res; 02484 DWORD clst, sect; 02485 UINT wcnt, cc; 02486 const BYTE *wbuff = (BYTE *)buff; 02487 BYTE csect; 02488 02489 02490 *bw = 0; /* Initialize byte counter */ 02491 02492 res = validate(fp->fs, fp->id); /* Check validity */ 02493 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02494 if (fp->flag & FA__ERROR) /* Aborted file? */ 02495 LEAVE_FF(fp->fs, FR_INT_ERR); 02496 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 02497 LEAVE_FF(fp->fs, FR_DENIED); 02498 if ((DWORD)(fp->fsize + btw) < fp->fsize) btw = 0; /* File size cannot reach 4GB */ 02499 02500 for ( ; btw; /* Repeat until all data written */ 02501 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) { 02502 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 02503 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 02504 if (!csect) { /* On the cluster boundary? */ 02505 if (fp->fptr == 0) { /* On the top of the file? */ 02506 clst = fp->sclust; /* Follow from the origin */ 02507 if (clst == 0) /* When no cluster is allocated, */ 02508 fp->sclust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */ 02509 } else { /* Middle or end of the file */ 02510 #if _USE_FASTSEEK 02511 if (fp->cltbl) 02512 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 02513 else 02514 #endif 02515 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */ 02516 } 02517 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ 02518 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 02519 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02520 fp->clust = clst; /* Update current cluster */ 02521 } 02522 #if _FS_TINY 02523 if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write-back sector cache */ 02524 ABORT(fp->fs, FR_DISK_ERR); 02525 #else 02526 if (fp->flag & FA__DIRTY) { /* Write-back sector cache */ 02527 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02528 ABORT(fp->fs, FR_DISK_ERR); 02529 fp->flag &= ~FA__DIRTY; 02530 } 02531 #endif 02532 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ 02533 if (!sect) ABORT(fp->fs, FR_INT_ERR); 02534 sect += csect; 02535 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */ 02536 if (cc) { /* Write maximum contiguous sectors directly */ 02537 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 02538 cc = fp->fs->csize - csect; 02539 if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK) 02540 ABORT(fp->fs, FR_DISK_ERR); 02541 #if _FS_TINY 02542 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 02543 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs)); 02544 fp->fs->wflag = 0; 02545 } 02546 #else 02547 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 02548 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs)); 02549 fp->flag &= ~FA__DIRTY; 02550 } 02551 #endif 02552 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 02553 continue; 02554 } 02555 #if _FS_TINY 02556 if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */ 02557 if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR); 02558 fp->fs->winsect = sect; 02559 } 02560 #else 02561 if (fp->dsect != sect) { /* Fill sector cache with file data */ 02562 if (fp->fptr < fp->fsize && 02563 disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) 02564 ABORT(fp->fs, FR_DISK_ERR); 02565 } 02566 #endif 02567 fp->dsect = sect; 02568 } 02569 wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */ 02570 if (wcnt > btw) wcnt = btw; 02571 #if _FS_TINY 02572 if (move_window(fp->fs, fp->dsect)) /* Move sector window */ 02573 ABORT(fp->fs, FR_DISK_ERR); 02574 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 02575 fp->fs->wflag = 1; 02576 #else 02577 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 02578 fp->flag |= FA__DIRTY; 02579 #endif 02580 } 02581 02582 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */ 02583 fp->flag |= FA__WRITTEN; /* Set file change flag */ 02584 02585 LEAVE_FF(fp->fs, FR_OK); 02586 } 02587 02588 02589 02590 02591 /*-----------------------------------------------------------------------*/ 02592 /* Synchronize the File Object */ 02593 /*-----------------------------------------------------------------------*/ 02594 02595 FRESULT f_sync ( 02596 FIL *fp /* Pointer to the file object */ 02597 ) 02598 { 02599 FRESULT res; 02600 DWORD tim; 02601 BYTE *dir; 02602 02603 02604 res = validate(fp->fs, fp->id); /* Check validity of the object */ 02605 if (res == FR_OK) { 02606 if (fp->flag & FA__WRITTEN) { /* Has the file been written? */ 02607 #if !_FS_TINY /* Write-back dirty buffer */ 02608 if (fp->flag & FA__DIRTY) { 02609 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02610 LEAVE_FF(fp->fs, FR_DISK_ERR); 02611 fp->flag &= ~FA__DIRTY; 02612 } 02613 #endif 02614 /* Update the directory entry */ 02615 res = move_window(fp->fs, fp->dir_sect); 02616 if (res == FR_OK) { 02617 dir = fp->dir_ptr; 02618 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ 02619 ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */ 02620 ST_CLUST(dir, fp->sclust); /* Update start cluster */ 02621 tim = get_fattime(); /* Update updated time */ 02622 ST_DWORD(dir+DIR_WrtTime, tim); 02623 fp->flag &= ~FA__WRITTEN; 02624 fp->fs->wflag = 1; 02625 res = sync(fp->fs); 02626 } 02627 } 02628 } 02629 02630 LEAVE_FF(fp->fs, res); 02631 } 02632 02633 #endif /* !_FS_READONLY */ 02634 02635 02636 02637 02638 /*-----------------------------------------------------------------------*/ 02639 /* Close File */ 02640 /*-----------------------------------------------------------------------*/ 02641 02642 FRESULT f_close ( 02643 FIL *fp /* Pointer to the file object to be closed */ 02644 ) 02645 { 02646 FRESULT res; 02647 02648 #if _FS_READONLY 02649 FATFS *fs = fp->fs; 02650 res = validate(fs, fp->id); 02651 if (res == FR_OK) fp->fs = 0; /* Discard file object */ 02652 LEAVE_FF(fs, res); 02653 02654 #else 02655 res = f_sync(fp); /* Flush cached data */ 02656 #if _FS_SHARE 02657 if (res == FR_OK) { /* Decrement open counter */ 02658 #if _FS_REENTRANT 02659 res = validate(fp->fs, fp->id); 02660 if (res == FR_OK) { 02661 res = dec_lock(fp->lockid); 02662 unlock_fs(fp->fs, FR_OK); 02663 } 02664 #else 02665 res = dec_lock(fp->lockid); 02666 #endif 02667 } 02668 #endif 02669 if (res == FR_OK) fp->fs = 0; /* Discard file object */ 02670 return res; 02671 #endif 02672 } 02673 02674 02675 02676 02677 /*-----------------------------------------------------------------------*/ 02678 /* Current Drive/Directory Handlings */ 02679 /*-----------------------------------------------------------------------*/ 02680 02681 #if _FS_RPATH >= 1 02682 02683 FRESULT f_chdrive ( 02684 BYTE drv /* Drive number */ 02685 ) 02686 { 02687 if (drv >= _VOLUMES) return FR_INVALID_DRIVE; 02688 02689 CurrVol = drv; 02690 02691 return FR_OK; 02692 } 02693 02694 02695 02696 FRESULT f_chdir ( 02697 const TCHAR *path /* Pointer to the directory path */ 02698 ) 02699 { 02700 FRESULT res; 02701 DIR dj; 02702 DEF_NAMEBUF; 02703 02704 02705 res = chk_mounted(&path, &dj.fs, 0); 02706 if (res == FR_OK) { 02707 INIT_BUF(dj); 02708 res = follow_path(&dj, path); /* Follow the path */ 02709 FREE_BUF(); 02710 if (res == FR_OK) { /* Follow completed */ 02711 if (!dj.dir) { 02712 dj.fs->cdir = dj.sclust; /* Start directory itself */ 02713 } else { 02714 if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */ 02715 dj.fs->cdir = LD_CLUST(dj.dir); 02716 else 02717 res = FR_NO_PATH; /* Reached but a file */ 02718 } 02719 } 02720 if (res == FR_NO_FILE) res = FR_NO_PATH; 02721 } 02722 02723 LEAVE_FF(dj.fs, res); 02724 } 02725 02726 02727 #if _FS_RPATH >= 2 02728 FRESULT f_getcwd ( 02729 TCHAR *path, /* Pointer to the directory path */ 02730 UINT sz_path /* Size of path */ 02731 ) 02732 { 02733 FRESULT res; 02734 DIR dj; 02735 UINT i, n; 02736 DWORD ccl; 02737 TCHAR *tp; 02738 FILINFO fno; 02739 DEF_NAMEBUF; 02740 02741 02742 *path = 0; 02743 res = chk_mounted((const TCHAR**)&path, &dj.fs, 0); /* Get current volume */ 02744 if (res == FR_OK) { 02745 INIT_BUF(dj); 02746 i = sz_path; /* Bottom of buffer (dir stack base) */ 02747 dj.sclust = dj.fs->cdir; /* Start to follow upper dir from current dir */ 02748 while ((ccl = dj.sclust) != 0) { /* Repeat while current dir is a sub-dir */ 02749 res = dir_sdi(&dj, 1); /* Get parent dir */ 02750 if (res != FR_OK) break; 02751 res = dir_read(&dj); 02752 if (res != FR_OK) break; 02753 dj.sclust = LD_CLUST(dj.dir); /* Goto parent dir */ 02754 res = dir_sdi(&dj, 0); 02755 if (res != FR_OK) break; 02756 do { /* Find the entry links to the child dir */ 02757 res = dir_read(&dj); 02758 if (res != FR_OK) break; 02759 if (ccl == LD_CLUST(dj.dir)) break; /* Found the entry */ 02760 res = dir_next(&dj, 0); 02761 } while (res == FR_OK); 02762 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ 02763 if (res != FR_OK) break; 02764 #if _USE_LFN 02765 fno.lfname = path; 02766 fno.lfsize = i; 02767 #endif 02768 get_fileinfo(&dj, &fno); /* Get the dir name and push it to the buffer */ 02769 tp = fno.fname; 02770 if (_USE_LFN && *path) tp = path; 02771 for (n = 0; tp[n]; n++) ; 02772 if (i < n + 3) { 02773 res = FR_NOT_ENOUGH_CORE; break; 02774 } 02775 while (n) path[--i] = tp[--n]; 02776 path[--i] = '/'; 02777 } 02778 tp = path; 02779 if (res == FR_OK) { 02780 *tp++ = '0' + CurrVol; /* Put drive number */ 02781 *tp++ = ':'; 02782 if (i == sz_path) { /* Root-dir */ 02783 *tp++ = '/'; 02784 } else { /* Sub-dir */ 02785 do /* Add stacked path str */ 02786 *tp++ = path[i++]; 02787 while (i < sz_path); 02788 } 02789 } 02790 *tp = 0; 02791 FREE_BUF(); 02792 } 02793 02794 LEAVE_FF(dj.fs, res); 02795 } 02796 #endif /* _FS_RPATH >= 2 */ 02797 #endif /* _FS_RPATH >= 1 */ 02798 02799 02800 02801 #if _FS_MINIMIZE <= 2 02802 /*-----------------------------------------------------------------------*/ 02803 /* Seek File R/W Pointer */ 02804 /*-----------------------------------------------------------------------*/ 02805 02806 FRESULT f_lseek ( 02807 FIL *fp, /* Pointer to the file object */ 02808 DWORD ofs /* File pointer from top of file */ 02809 ) 02810 { 02811 FRESULT res; 02812 02813 02814 res = validate(fp->fs, fp->id); /* Check validity of the object */ 02815 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02816 if (fp->flag & FA__ERROR) /* Check abort flag */ 02817 LEAVE_FF(fp->fs, FR_INT_ERR); 02818 02819 #if _USE_FASTSEEK 02820 if (fp->cltbl) { /* Fast seek */ 02821 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl; 02822 02823 if (ofs == CREATE_LINKMAP) { /* Create CLMT */ 02824 tbl = fp->cltbl; 02825 tlen = *tbl++; ulen = 2; /* Given table size and required table size */ 02826 cl = fp->sclust; /* Top of the chain */ 02827 if (cl) { 02828 do { 02829 /* Get a fragment */ 02830 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */ 02831 do { 02832 pcl = cl; ncl++; 02833 cl = get_fat(fp->fs, cl); 02834 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR); 02835 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02836 } while (cl == pcl + 1); 02837 if (ulen <= tlen) { /* Store the length and top of the fragment */ 02838 *tbl++ = ncl; *tbl++ = tcl; 02839 } 02840 } while (cl < fp->fs->n_fatent); /* Repeat until end of chain */ 02841 } 02842 *fp->cltbl = ulen; /* Number of items used */ 02843 if (ulen <= tlen) 02844 *tbl = 0; /* Terminate table */ 02845 else 02846 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */ 02847 02848 } else { /* Fast seek */ 02849 if (ofs > fp->fsize) /* Clip offset at the file size */ 02850 ofs = fp->fsize; 02851 fp->fptr = ofs; /* Set file pointer */ 02852 if (ofs) { 02853 fp->clust = clmt_clust(fp, ofs - 1); 02854 dsc = clust2sect(fp->fs, fp->clust); 02855 if (!dsc) ABORT(fp->fs, FR_INT_ERR); 02856 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1); 02857 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */ 02858 #if !_FS_TINY 02859 #if !_FS_READONLY 02860 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 02861 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02862 ABORT(fp->fs, FR_DISK_ERR); 02863 fp->flag &= ~FA__DIRTY; 02864 } 02865 #endif 02866 if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */ 02867 ABORT(fp->fs, FR_DISK_ERR); 02868 #endif 02869 fp->dsect = dsc; 02870 } 02871 } 02872 } 02873 } else 02874 #endif 02875 02876 /* Normal Seek */ 02877 { 02878 DWORD clst, bcs, nsect, ifptr; 02879 02880 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */ 02881 #if !_FS_READONLY 02882 && !(fp->flag & FA_WRITE) 02883 #endif 02884 ) ofs = fp->fsize; 02885 02886 ifptr = fp->fptr; 02887 fp->fptr = nsect = 0; 02888 if (ofs) { 02889 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */ 02890 if (ifptr > 0 && 02891 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ 02892 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ 02893 ofs -= fp->fptr; 02894 clst = fp->clust; 02895 } else { /* When seek to back cluster, */ 02896 clst = fp->sclust; /* start from the first cluster */ 02897 #if !_FS_READONLY 02898 if (clst == 0) { /* If no cluster chain, create a new chain */ 02899 clst = create_chain(fp->fs, 0); 02900 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 02901 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02902 fp->sclust = clst; 02903 } 02904 #endif 02905 fp->clust = clst; 02906 } 02907 if (clst != 0) { 02908 while (ofs > bcs) { /* Cluster following loop */ 02909 #if !_FS_READONLY 02910 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ 02911 clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */ 02912 if (clst == 0) { /* When disk gets full, clip file size */ 02913 ofs = bcs; break; 02914 } 02915 } else 02916 #endif 02917 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */ 02918 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02919 if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR); 02920 fp->clust = clst; 02921 fp->fptr += bcs; 02922 ofs -= bcs; 02923 } 02924 fp->fptr += ofs; 02925 if (ofs % SS(fp->fs)) { 02926 nsect = clust2sect(fp->fs, clst); /* Current sector */ 02927 if (!nsect) ABORT(fp->fs, FR_INT_ERR); 02928 nsect += ofs / SS(fp->fs); 02929 } 02930 } 02931 } 02932 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */ 02933 #if !_FS_TINY 02934 #if !_FS_READONLY 02935 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 02936 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK) 02937 ABORT(fp->fs, FR_DISK_ERR); 02938 fp->flag &= ~FA__DIRTY; 02939 } 02940 #endif 02941 if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */ 02942 ABORT(fp->fs, FR_DISK_ERR); 02943 #endif 02944 fp->dsect = nsect; 02945 } 02946 #if !_FS_READONLY 02947 if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */ 02948 fp->fsize = fp->fptr; 02949 fp->flag |= FA__WRITTEN; 02950 } 02951 #endif 02952 } 02953 02954 LEAVE_FF(fp->fs, res); 02955 } 02956 02957 02958 02959 #if _FS_MINIMIZE <= 1 02960 /*-----------------------------------------------------------------------*/ 02961 /* Create a Directroy Object */ 02962 /*-----------------------------------------------------------------------*/ 02963 02964 FRESULT f_opendir ( 02965 eDIR *dj, /* Pointer to directory object to create */ 02966 const TCHAR *path /* Pointer to the directory path */ 02967 ) 02968 { 02969 FRESULT res; 02970 DEF_NAMEBUF; 02971 02972 02973 res = chk_mounted(&path, &dj->fs, 0); 02974 if (res == FR_OK) { 02975 INIT_BUF(*dj); 02976 res = follow_path(dj, path); /* Follow the path to the directory */ 02977 FREE_BUF(); 02978 if (res == FR_OK) { /* Follow completed */ 02979 if (dj->dir) { /* It is not the root dir */ 02980 if (dj->dir[DIR_Attr] & AM_DIR) { /* The object is a directory */ 02981 dj->sclust = LD_CLUST(dj->dir); 02982 } else { /* The object is not a directory */ 02983 res = FR_NO_PATH; 02984 } 02985 } 02986 if (res == FR_OK) { 02987 dj->id = dj->fs->id; 02988 res = dir_sdi(dj, 0); /* Rewind dir */ 02989 } 02990 } 02991 if (res == FR_NO_FILE) res = FR_NO_PATH; 02992 } 02993 02994 LEAVE_FF(dj->fs, res); 02995 } 02996 02997 02998 02999 03000 /*-----------------------------------------------------------------------*/ 03001 /* Read Directory Entry in Sequense */ 03002 /*-----------------------------------------------------------------------*/ 03003 03004 FRESULT f_readdir ( 03005 eDIR *dj, /* Pointer to the open directory object */ 03006 FILINFO *fno /* Pointer to file information to return */ 03007 ) 03008 { 03009 FRESULT res; 03010 DEF_NAMEBUF; 03011 03012 03013 res = validate(dj->fs, dj->id); /* Check validity of the object */ 03014 if (res == FR_OK) { 03015 if (!fno) { 03016 res = dir_sdi(dj, 0); /* Rewind the directory object */ 03017 } else { 03018 INIT_BUF(*dj); 03019 res = dir_read(dj); /* Read an directory item */ 03020 if (res == FR_NO_FILE) { /* Reached end of dir */ 03021 dj->sect = 0; 03022 res = FR_OK; 03023 } 03024 if (res == FR_OK) { /* A valid entry is found */ 03025 get_fileinfo(dj, fno); /* Get the object information */ 03026 res = dir_next(dj, 0); /* Increment index for next */ 03027 if (res == FR_NO_FILE) { 03028 dj->sect = 0; 03029 res = FR_OK; 03030 } 03031 } 03032 FREE_BUF(); 03033 } 03034 } 03035 03036 LEAVE_FF(dj->fs, res); 03037 } 03038 03039 03040 03041 #if _FS_MINIMIZE == 0 03042 /*-----------------------------------------------------------------------*/ 03043 /* Get File Status */ 03044 /*-----------------------------------------------------------------------*/ 03045 03046 FRESULT f_stat ( 03047 const TCHAR *path, /* Pointer to the file path */ 03048 FILINFO *fno /* Pointer to file information to return */ 03049 ) 03050 { 03051 FRESULT res; 03052 eDIR dj; 03053 DEF_NAMEBUF; 03054 03055 03056 res = chk_mounted(&path, &dj.fs, 0); 03057 if (res == FR_OK) { 03058 INIT_BUF(dj); 03059 res = follow_path(&dj, path); /* Follow the file path */ 03060 if (res == FR_OK) { /* Follow completed */ 03061 if (dj.dir) /* Found an object */ 03062 get_fileinfo(&dj, fno); 03063 else /* It is root dir */ 03064 res = FR_INVALID_NAME; 03065 } 03066 FREE_BUF(); 03067 } 03068 03069 LEAVE_FF(dj.fs, res); 03070 } 03071 03072 03073 03074 #if !_FS_READONLY 03075 /*-----------------------------------------------------------------------*/ 03076 /* Get Number of Free Clusters */ 03077 /*-----------------------------------------------------------------------*/ 03078 03079 FRESULT f_getfree ( 03080 const TCHAR *path, /* Pointer to the logical drive number (root dir) */ 03081 DWORD *nclst, /* Pointer to the variable to return number of free clusters */ 03082 FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */ 03083 ) 03084 { 03085 FRESULT res; 03086 DWORD n, clst, sect, stat; 03087 UINT i; 03088 BYTE fat, *p; 03089 03090 03091 /* Get drive number */ 03092 res = chk_mounted(&path, fatfs, 0); 03093 if (res == FR_OK) { 03094 /* If free_clust is valid, return it without full cluster scan */ 03095 if ((*fatfs)->free_clust <= (*fatfs)->n_fatent - 2) { 03096 *nclst = (*fatfs)->free_clust; 03097 } else { 03098 /* Get number of free clusters */ 03099 fat = (*fatfs)->fs_type; 03100 n = 0; 03101 if (fat == FS_FAT12) { 03102 clst = 2; 03103 do { 03104 stat = get_fat(*fatfs, clst); 03105 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 03106 if (stat == 1) { res = FR_INT_ERR; break; } 03107 if (stat == 0) n++; 03108 } while (++clst < (*fatfs)->n_fatent); 03109 } else { 03110 clst = (*fatfs)->n_fatent; 03111 sect = (*fatfs)->fatbase; 03112 i = 0; p = 0; 03113 do { 03114 if (!i) { 03115 res = move_window(*fatfs, sect++); 03116 if (res != FR_OK) break; 03117 p = (*fatfs)->win; 03118 i = SS(*fatfs); 03119 } 03120 if (fat == FS_FAT16) { 03121 if (LD_WORD(p) == 0) n++; 03122 p += 2; i -= 2; 03123 } else { 03124 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++; 03125 p += 4; i -= 4; 03126 } 03127 } while (--clst); 03128 } 03129 (*fatfs)->free_clust = n; 03130 if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1; 03131 *nclst = n; 03132 } 03133 } 03134 LEAVE_FF(*fatfs, res); 03135 } 03136 03137 03138 03139 03140 /*-----------------------------------------------------------------------*/ 03141 /* Truncate File */ 03142 /*-----------------------------------------------------------------------*/ 03143 03144 FRESULT f_truncate ( 03145 FIL *fp /* Pointer to the file object */ 03146 ) 03147 { 03148 FRESULT res; 03149 DWORD ncl; 03150 03151 03152 res = validate(fp->fs, fp->id); /* Check validity of the object */ 03153 if (res == FR_OK) { 03154 if (fp->flag & FA__ERROR) { /* Check abort flag */ 03155 res = FR_INT_ERR; 03156 } else { 03157 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 03158 res = FR_DENIED; 03159 } 03160 } 03161 if (res == FR_OK) { 03162 if (fp->fsize > fp->fptr) { 03163 fp->fsize = fp->fptr; /* Set file size to current R/W point */ 03164 fp->flag |= FA__WRITTEN; 03165 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ 03166 res = remove_chain(fp->fs, fp->sclust); 03167 fp->sclust = 0; 03168 } else { /* When truncate a part of the file, remove remaining clusters */ 03169 ncl = get_fat(fp->fs, fp->clust); 03170 res = FR_OK; 03171 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; 03172 if (ncl == 1) res = FR_INT_ERR; 03173 if (res == FR_OK && ncl < fp->fs->n_fatent) { 03174 res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF); 03175 if (res == FR_OK) res = remove_chain(fp->fs, ncl); 03176 } 03177 } 03178 } 03179 if (res != FR_OK) fp->flag |= FA__ERROR; 03180 } 03181 03182 LEAVE_FF(fp->fs, res); 03183 } 03184 03185 03186 03187 03188 /*-----------------------------------------------------------------------*/ 03189 /* Delete a File or Directory */ 03190 /*-----------------------------------------------------------------------*/ 03191 03192 FRESULT f_unlink ( 03193 const TCHAR *path /* Pointer to the file or directory path */ 03194 ) 03195 { 03196 FRESULT res; 03197 eDIR dj, sdj; 03198 BYTE *dir; 03199 DWORD dclst; 03200 DEF_NAMEBUF; 03201 03202 03203 res = chk_mounted(&path, &dj.fs, 1); 03204 if (res == FR_OK) { 03205 INIT_BUF(dj); 03206 res = follow_path(&dj, path); /* Follow the file path */ 03207 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 03208 res = FR_INVALID_NAME; /* Cannot remove dot entry */ 03209 #if _FS_SHARE 03210 if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open file */ 03211 #endif 03212 if (res == FR_OK) { /* The object is accessible */ 03213 dir = dj.dir; 03214 if (!dir) { 03215 res = FR_INVALID_NAME; /* Cannot remove the start directory */ 03216 } else { 03217 if (dir[DIR_Attr] & AM_RDO) 03218 res = FR_DENIED; /* Cannot remove R/O object */ 03219 } 03220 dclst = LD_CLUST(dir); 03221 if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */ 03222 if (dclst < 2) { 03223 res = FR_INT_ERR; 03224 } else { 03225 mem_cpy(&sdj, &dj, sizeof(eDIR)); /* Check if the sub-dir is empty or not */ 03226 sdj.sclust = dclst; 03227 res = dir_sdi(&sdj, 2); /* Exclude dot entries */ 03228 if (res == FR_OK) { 03229 res = dir_read(&sdj); 03230 if (res == FR_OK /* Not empty dir */ 03231 #if _FS_RPATH 03232 || dclst == sdj.fs->cdir /* Current dir */ 03233 #endif 03234 ) res = FR_DENIED; 03235 if (res == FR_NO_FILE) res = FR_OK; /* Empty */ 03236 } 03237 } 03238 } 03239 if (res == FR_OK) { 03240 res = dir_remove(&dj); /* Remove the directory entry */ 03241 if (res == FR_OK) { 03242 if (dclst) /* Remove the cluster chain if exist */ 03243 res = remove_chain(dj.fs, dclst); 03244 if (res == FR_OK) res = sync(dj.fs); 03245 } 03246 } 03247 } 03248 FREE_BUF(); 03249 } 03250 LEAVE_FF(dj.fs, res); 03251 } 03252 03253 03254 03255 03256 /*-----------------------------------------------------------------------*/ 03257 /* Create a Directory */ 03258 /*-----------------------------------------------------------------------*/ 03259 03260 FRESULT f_mkdir ( 03261 const TCHAR *path /* Pointer to the directory path */ 03262 ) 03263 { 03264 FRESULT res; 03265 eDIR dj; 03266 BYTE *dir, n; 03267 DWORD dsc, dcl, pcl, tim = get_fattime(); 03268 DEF_NAMEBUF; 03269 03270 03271 res = chk_mounted(&path, &dj.fs, 1); 03272 if (res == FR_OK) { 03273 INIT_BUF(dj); 03274 res = follow_path(&dj, path); /* Follow the file path */ 03275 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */ 03276 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT)) 03277 res = FR_INVALID_NAME; 03278 if (res == FR_NO_FILE) { /* Can create a new directory */ 03279 dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */ 03280 res = FR_OK; 03281 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */ 03282 if (dcl == 1) res = FR_INT_ERR; 03283 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; 03284 if (res == FR_OK) /* Flush FAT */ 03285 res = move_window(dj.fs, 0); 03286 if (res == FR_OK) { /* Initialize the new directory table */ 03287 dsc = clust2sect(dj.fs, dcl); 03288 dir = dj.fs->win; 03289 mem_set(dir, 0, SS(dj.fs)); 03290 mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */ 03291 dir[DIR_Name] = '.'; 03292 dir[DIR_Attr] = AM_DIR; 03293 ST_DWORD(dir+DIR_WrtTime, tim); 03294 ST_CLUST(dir, dcl); 03295 mem_cpy(dir+SZ_DIR, dir, SZ_DIR); /* Create ".." entry */ 03296 dir[33] = '.'; pcl = dj.sclust; 03297 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase) 03298 pcl = 0; 03299 ST_CLUST(dir+SZ_DIR, pcl); 03300 for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */ 03301 dj.fs->winsect = dsc++; 03302 dj.fs->wflag = 1; 03303 res = move_window(dj.fs, 0); 03304 if (res != FR_OK) break; 03305 mem_set(dir, 0, SS(dj.fs)); 03306 } 03307 } 03308 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */ 03309 if (res != FR_OK) { 03310 remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */ 03311 } else { 03312 dir = dj.dir; 03313 dir[DIR_Attr] = AM_DIR; /* Attribute */ 03314 ST_DWORD(dir+DIR_WrtTime, tim); /* Created time */ 03315 ST_CLUST(dir, dcl); /* Table start cluster */ 03316 dj.fs->wflag = 1; 03317 res = sync(dj.fs); 03318 } 03319 } 03320 FREE_BUF(); 03321 } 03322 03323 LEAVE_FF(dj.fs, res); 03324 } 03325 03326 03327 03328 03329 /*-----------------------------------------------------------------------*/ 03330 /* Change Attribute */ 03331 /*-----------------------------------------------------------------------*/ 03332 03333 FRESULT f_chmod ( 03334 const TCHAR *path, /* Pointer to the file path */ 03335 BYTE value, /* Attribute bits */ 03336 BYTE mask /* Attribute mask to change */ 03337 ) 03338 { 03339 FRESULT res; 03340 eDIR dj; 03341 BYTE *dir; 03342 DEF_NAMEBUF; 03343 03344 03345 res = chk_mounted(&path, &dj.fs, 1); 03346 if (res == FR_OK) { 03347 INIT_BUF(dj); 03348 res = follow_path(&dj, path); /* Follow the file path */ 03349 FREE_BUF(); 03350 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 03351 res = FR_INVALID_NAME; 03352 if (res == FR_OK) { 03353 dir = dj.dir; 03354 if (!dir) { /* Is it a root directory? */ 03355 res = FR_INVALID_NAME; 03356 } else { /* File or sub directory */ 03357 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ 03358 dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 03359 dj.fs->wflag = 1; 03360 res = sync(dj.fs); 03361 } 03362 } 03363 } 03364 03365 LEAVE_FF(dj.fs, res); 03366 } 03367 03368 03369 03370 03371 /*-----------------------------------------------------------------------*/ 03372 /* Change Timestamp */ 03373 /*-----------------------------------------------------------------------*/ 03374 03375 FRESULT f_utime ( 03376 const TCHAR *path, /* Pointer to the file/directory name */ 03377 const FILINFO *fno /* Pointer to the time stamp to be set */ 03378 ) 03379 { 03380 FRESULT res; 03381 eDIR dj; 03382 BYTE *dir; 03383 DEF_NAMEBUF; 03384 03385 03386 res = chk_mounted(&path, &dj.fs, 1); 03387 if (res == FR_OK) { 03388 INIT_BUF(dj); 03389 res = follow_path(&dj, path); /* Follow the file path */ 03390 FREE_BUF(); 03391 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 03392 res = FR_INVALID_NAME; 03393 if (res == FR_OK) { 03394 dir = dj.dir; 03395 if (!dir) { /* Root directory */ 03396 res = FR_INVALID_NAME; 03397 } else { /* File or sub-directory */ 03398 ST_WORD(dir+DIR_WrtTime, fno->ftime); 03399 ST_WORD(dir+DIR_WrtDate, fno->fdate); 03400 dj.fs->wflag = 1; 03401 res = sync(dj.fs); 03402 } 03403 } 03404 } 03405 03406 LEAVE_FF(dj.fs, res); 03407 } 03408 03409 03410 03411 03412 /*-----------------------------------------------------------------------*/ 03413 /* Rename File/Directory */ 03414 /*-----------------------------------------------------------------------*/ 03415 03416 FRESULT f_rename ( 03417 const TCHAR *path_old, /* Pointer to the old name */ 03418 const TCHAR *path_new /* Pointer to the new name */ 03419 ) 03420 { 03421 FRESULT res; 03422 eDIR djo, djn; 03423 BYTE buf[21], *dir; 03424 DWORD dw; 03425 DEF_NAMEBUF; 03426 03427 03428 res = chk_mounted(&path_old, &djo.fs, 1); 03429 if (res == FR_OK) { 03430 djn.fs = djo.fs; 03431 INIT_BUF(djo); 03432 res = follow_path(&djo, path_old); /* Check old object */ 03433 if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT)) 03434 res = FR_INVALID_NAME; 03435 #if _FS_SHARE 03436 if (res == FR_OK) res = chk_lock(&djo, 2); 03437 #endif 03438 if (res == FR_OK) { /* Old object is found */ 03439 if (!djo.dir) { /* Is root dir? */ 03440 res = FR_NO_FILE; 03441 } else { 03442 mem_cpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except for name */ 03443 mem_cpy(&djn, &djo, sizeof(eDIR)); /* Check new object */ 03444 res = follow_path(&djn, path_new); 03445 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */ 03446 if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */ 03447 /* Start critical section that any interruption or error can cause cross-link */ 03448 res = dir_register(&djn); /* Register the new entry */ 03449 if (res == FR_OK) { 03450 dir = djn.dir; /* Copy object information except for name */ 03451 mem_cpy(dir+13, buf+2, 19); 03452 dir[DIR_Attr] = buf[0] | AM_ARC; 03453 djo.fs->wflag = 1; 03454 if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) { /* Update .. entry in the directory if needed */ 03455 dw = clust2sect(djn.fs, LD_CLUST(dir)); 03456 if (!dw) { 03457 res = FR_INT_ERR; 03458 } else { 03459 res = move_window(djn.fs, dw); 03460 dir = djn.fs->win+SZ_DIR; /* .. entry */ 03461 if (res == FR_OK && dir[1] == '.') { 03462 dw = (djn.fs->fs_type == FS_FAT32 && djn.sclust == djn.fs->dirbase) ? 0 : djn.sclust; 03463 ST_CLUST(dir, dw); 03464 djn.fs->wflag = 1; 03465 } 03466 } 03467 } 03468 if (res == FR_OK) { 03469 res = dir_remove(&djo); /* Remove old entry */ 03470 if (res == FR_OK) 03471 res = sync(djo.fs); 03472 } 03473 } 03474 /* End critical section */ 03475 } 03476 } 03477 } 03478 FREE_BUF(); 03479 } 03480 LEAVE_FF(djo.fs, res); 03481 } 03482 03483 #endif /* !_FS_READONLY */ 03484 #endif /* _FS_MINIMIZE == 0 */ 03485 #endif /* _FS_MINIMIZE <= 1 */ 03486 #endif /* _FS_MINIMIZE <= 2 */ 03487 03488 03489 03490 /*-----------------------------------------------------------------------*/ 03491 /* Forward data to the stream directly (available on only tiny cfg) */ 03492 /*-----------------------------------------------------------------------*/ 03493 #if _USE_FORWARD && _FS_TINY 03494 03495 FRESULT f_forward ( 03496 FIL *fp, /* Pointer to the file object */ 03497 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ 03498 UINT btr, /* Number of bytes to forward */ 03499 UINT *bf /* Pointer to number of bytes forwarded */ 03500 ) 03501 { 03502 FRESULT res; 03503 DWORD remain, clst, sect; 03504 UINT rcnt; 03505 BYTE csect; 03506 03507 03508 *bf = 0; /* Initialize byte counter */ 03509 03510 res = validate(fp->fs, fp->id); /* Check validity of the object */ 03511 if (res != FR_OK) LEAVE_FF(fp->fs, res); 03512 if (fp->flag & FA__ERROR) /* Check error flag */ 03513 LEAVE_FF(fp->fs, FR_INT_ERR); 03514 if (!(fp->flag & FA_READ)) /* Check access mode */ 03515 LEAVE_FF(fp->fs, FR_DENIED); 03516 03517 remain = fp->fsize - fp->fptr; 03518 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 03519 03520 for ( ; btr && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */ 03521 fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) { 03522 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 03523 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 03524 if (!csect) { /* On the cluster boundary? */ 03525 clst = (fp->fptr == 0) ? /* On the top of the file? */ 03526 fp->sclust : get_fat(fp->fs, fp->clust); 03527 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR); 03528 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 03529 fp->clust = clst; /* Update current cluster */ 03530 } 03531 } 03532 sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */ 03533 if (!sect) ABORT(fp->fs, FR_INT_ERR); 03534 sect += csect; 03535 if (move_window(fp->fs, sect)) /* Move sector window */ 03536 ABORT(fp->fs, FR_DISK_ERR); 03537 fp->dsect = sect; 03538 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */ 03539 if (rcnt > btr) rcnt = btr; 03540 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt); 03541 if (!rcnt) ABORT(fp->fs, FR_INT_ERR); 03542 } 03543 03544 LEAVE_FF(fp->fs, FR_OK); 03545 } 03546 #endif /* _USE_FORWARD */ 03547 03548 03549 03550 #if _USE_MKFS && !_FS_READONLY 03551 /*-----------------------------------------------------------------------*/ 03552 /* Create File System on the Drive */ 03553 /*-----------------------------------------------------------------------*/ 03554 #define N_ROOTDIR 512 /* Number of root dir entries for FAT12/16 */ 03555 #define N_FATS 1 /* Number of FAT copies (1 or 2) */ 03556 03557 03558 FRESULT f_mkfs ( 03559 BYTE drv, /* Logical drive number */ 03560 BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */ 03561 UINT au /* Allocation unit size [bytes] */ 03562 ) 03563 { 03564 static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0}; 03565 static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512}; 03566 BYTE fmt, md, sys, *tbl, pdrv, part; 03567 DWORD n_clst, vs, n, wsect; 03568 UINT i; 03569 DWORD b_vol, b_fat, b_dir, b_data; /* LBA */ 03570 DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */ 03571 FATFS *fs; 03572 DSTATUS stat; 03573 03574 03575 /* Check mounted drive and clear work area */ 03576 if (drv >= _VOLUMES) return FR_INVALID_DRIVE; 03577 if (sfd > 1) return FR_INVALID_PARAMETER; 03578 if (au & (au - 1)) return FR_INVALID_PARAMETER; 03579 fs = FatFs[drv]; 03580 if (!fs) return FR_NOT_ENABLED; 03581 fs->fs_type = 0; 03582 pdrv = LD2PD(drv); /* Physical drive */ 03583 part = LD2PT(drv); /* Partition (0:auto detect, 1-4:get from partition table)*/ 03584 03585 /* Get disk statics */ 03586 stat = disk_initialize(pdrv); 03587 if (stat & STA_NOINIT) return FR_NOT_READY; 03588 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 03589 #if _MAX_SS != 512 /* Get disk sector size */ 03590 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS) 03591 return FR_DISK_ERR; 03592 #endif 03593 if (_MULTI_PARTITION && part) { 03594 /* Get partition information from partition table in the MBR */ 03595 if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR; 03596 if (LD_WORD(fs->win+BS_55AA) != 0xAA55) return FR_MKFS_ABORTED; 03597 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE]; 03598 if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */ 03599 b_vol = LD_DWORD(tbl+8); /* Volume start sector */ 03600 n_vol = LD_DWORD(tbl+12); /* Volume size */ 03601 } else { 03602 /* Create a partition in this function */ 03603 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128) 03604 return FR_DISK_ERR; 03605 b_vol = (sfd) ? 0 : 63; /* Volume start sector */ 03606 n_vol -= b_vol; /* Volume size */ 03607 } 03608 03609 if (!au) { /* AU auto selection */ 03610 vs = n_vol / (2000 / (SS(fs) / 512)); 03611 for (i = 0; vs < vst[i]; i++) ; 03612 au = cst[i]; 03613 } 03614 au /= SS(fs); /* Number of sectors per cluster */ 03615 if (au == 0) au = 1; 03616 if (au > 128) au = 128; 03617 03618 /* Pre-compute number of clusters and FAT syb-type */ 03619 n_clst = n_vol / au; 03620 fmt = FS_FAT12; 03621 if (n_clst >= MIN_FAT16) fmt = FS_FAT16; 03622 if (n_clst >= MIN_FAT32) fmt = FS_FAT32; 03623 03624 /* Determine offset and size of FAT structure */ 03625 if (fmt == FS_FAT32) { 03626 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs); 03627 n_rsv = 32; 03628 n_dir = 0; 03629 } else { 03630 n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4; 03631 n_fat = (n_fat + SS(fs) - 1) / SS(fs); 03632 n_rsv = 1; 03633 n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs); 03634 } 03635 b_fat = b_vol + n_rsv; /* FAT area start sector */ 03636 b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */ 03637 b_data = b_dir + n_dir; /* Data area start sector */ 03638 if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */ 03639 03640 /* Align data start sector to erase block boundary (for flash memory media) */ 03641 if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1; 03642 n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */ 03643 n = (n - b_data) / N_FATS; 03644 if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */ 03645 n_rsv += n; 03646 b_fat += n; 03647 } else { /* FAT12/16: Expand FAT size */ 03648 n_fat += n; 03649 } 03650 03651 /* Determine number of clusters and final check of validity of the FAT sub-type */ 03652 n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au; 03653 if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16) 03654 || (fmt == FS_FAT32 && n_clst < MIN_FAT32)) 03655 return FR_MKFS_ABORTED; 03656 03657 switch (fmt) { /* Determine system ID for partition table */ 03658 case FS_FAT12: sys = 0x01; break; 03659 case FS_FAT16: sys = (n_vol < 0x10000) ? 0x04 : 0x06; break; 03660 default: sys = 0x0C; 03661 } 03662 03663 if (_MULTI_PARTITION && part) { 03664 /* Update system ID in the partition table */ 03665 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE]; 03666 tbl[4] = sys; 03667 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR; 03668 md = 0xF8; 03669 } else { 03670 if (sfd) { /* No patition table (SFD) */ 03671 md = 0xF0; 03672 } else { /* Create partition table (FDISK) */ 03673 mem_set(fs->win, 0, SS(fs)); 03674 tbl = fs->win+MBR_Table; /* Create partiton table for single partition in the drive */ 03675 tbl[1] = 1; /* Partition start head */ 03676 tbl[2] = 1; /* Partition start sector */ 03677 tbl[3] = 0; /* Partition start cylinder */ 03678 tbl[4] = sys; /* System type */ 03679 tbl[5] = 254; /* Partition end head */ 03680 n = (b_vol + n_vol) / 63 / 255; 03681 tbl[6] = (BYTE)((n >> 2) | 63); /* Partiiton end sector */ 03682 tbl[7] = (BYTE)n; /* End cylinder */ 03683 ST_DWORD(tbl+8, 63); /* Partition start in LBA */ 03684 ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */ 03685 ST_WORD(fs->win+BS_55AA, 0xAA55); /* MBR signature */ 03686 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR sector */ 03687 return FR_DISK_ERR; 03688 md = 0xF8; 03689 } 03690 } 03691 03692 /* Create BPB in the VBR */ 03693 tbl = fs->win; /* Clear sector */ 03694 mem_set(tbl, 0, SS(fs)); 03695 mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */ 03696 i = SS(fs); /* Sector size */ 03697 ST_WORD(tbl+BPB_BytsPerSec, i); 03698 tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */ 03699 ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */ 03700 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */ 03701 i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of rootdir entries */ 03702 ST_WORD(tbl+BPB_RootEntCnt, i); 03703 if (n_vol < 0x10000) { /* Number of total sectors */ 03704 ST_WORD(tbl+BPB_TotSec16, n_vol); 03705 } else { 03706 ST_DWORD(tbl+BPB_TotSec32, n_vol); 03707 } 03708 tbl[BPB_Media] = md; /* Media descriptor */ 03709 ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */ 03710 ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */ 03711 ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */ 03712 n = get_fattime(); /* Use current time as VSN */ 03713 if (fmt == FS_FAT32) { 03714 ST_DWORD(tbl+BS_VolID32, n); /* VSN */ 03715 ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */ 03716 ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */ 03717 ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (VBR+1) */ 03718 ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */ 03719 tbl[BS_DrvNum32] = 0x80; /* Drive number */ 03720 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */ 03721 mem_cpy(tbl+BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ 03722 } else { 03723 ST_DWORD(tbl+BS_VolID, n); /* VSN */ 03724 ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */ 03725 tbl[BS_DrvNum] = 0x80; /* Drive number */ 03726 tbl[BS_BootSig] = 0x29; /* Extended boot signature */ 03727 mem_cpy(tbl+BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ 03728 } 03729 ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */ 03730 if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */ 03731 return FR_DISK_ERR; 03732 if (fmt == FS_FAT32) /* Write backup VBR if needed (VBR+6) */ 03733 disk_write(pdrv, tbl, b_vol + 6, 1); 03734 03735 /* Initialize FAT area */ 03736 wsect = b_fat; 03737 for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */ 03738 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */ 03739 n = md; /* Media descriptor byte */ 03740 if (fmt != FS_FAT32) { 03741 n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00; 03742 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */ 03743 } else { 03744 n |= 0xFFFFFF00; 03745 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */ 03746 ST_DWORD(tbl+4, 0xFFFFFFFF); 03747 ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */ 03748 } 03749 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) 03750 return FR_DISK_ERR; 03751 mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */ 03752 for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */ 03753 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) 03754 return FR_DISK_ERR; 03755 } 03756 } 03757 03758 /* Initialize root directory */ 03759 i = (fmt == FS_FAT32) ? au : n_dir; 03760 do { 03761 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK) 03762 return FR_DISK_ERR; 03763 } while (--i); 03764 03765 #if _USE_ERASE /* Erase data area if needed */ 03766 { 03767 DWORD eb[2]; 03768 03769 eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1; 03770 disk_ioctl(pdrv, CTRL_ERASE_SECTOR, eb); 03771 } 03772 #endif 03773 03774 /* Create FSInfo if needed */ 03775 if (fmt == FS_FAT32) { 03776 ST_DWORD(tbl+FSI_LeadSig, 0x41615252); 03777 ST_DWORD(tbl+FSI_StrucSig, 0x61417272); 03778 ST_DWORD(tbl+FSI_Free_Count, n_clst - 1); /* Number of free clusters */ 03779 ST_DWORD(tbl+FSI_Nxt_Free, 2); /* Last allocated cluster# */ 03780 ST_WORD(tbl+BS_55AA, 0xAA55); 03781 disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR+1) */ 03782 disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR+7) */ 03783 } 03784 03785 return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR; 03786 } 03787 03788 03789 #if _MULTI_PARTITION == 2 03790 /*-----------------------------------------------------------------------*/ 03791 /* Divide Physical Drive */ 03792 /*-----------------------------------------------------------------------*/ 03793 03794 FRESULT f_fdisk ( 03795 BYTE pdrv, /* Physical drive number */ 03796 const DWORD szt[], /* Pointer to the size table for each partitions */ 03797 void* work /* Pointer to the working buffer */ 03798 ) 03799 { 03800 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl; 03801 BYTE s_hd, e_hd, *p, *buf = (BYTE*)work; 03802 DSTATUS stat; 03803 DWORD sz_disk, sz_part, s_part; 03804 03805 03806 stat = disk_initialize(pdrv); 03807 if (stat & STA_NOINIT) return FR_NOT_READY; 03808 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 03809 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR; 03810 03811 /* Determine CHS in the table regardless of the drive geometry */ 03812 for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ; 03813 if (n == 256) n--; 03814 e_hd = n - 1; 03815 sz_cyl = 63 * n; 03816 tot_cyl = sz_disk / sz_cyl; 03817 03818 /* Create partition table */ 03819 mem_set(buf, 0, _MAX_SS); 03820 p = buf + MBR_Table; b_cyl = 0; 03821 for (i = 0; i < 4; i++, p += SZ_PTE) { 03822 p_cyl = (szt[i] <= 100) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl; 03823 if (!p_cyl) continue; 03824 s_part = (DWORD)sz_cyl * b_cyl; 03825 sz_part = (DWORD)sz_cyl * p_cyl; 03826 if (i == 0) { /* Exclude first track of cylinder 0 */ 03827 s_hd = 1; 03828 s_part += 63; sz_part -= 63; 03829 } else { 03830 s_hd = 0; 03831 } 03832 e_cyl = b_cyl + p_cyl - 1; 03833 if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER; 03834 03835 /* Set partition table */ 03836 p[1] = s_hd; /* Start head */ 03837 p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */ 03838 p[3] = (BYTE)b_cyl; /* Start cylinder */ 03839 p[4] = 0x06; /* System type (temporary setting) */ 03840 p[5] = e_hd; /* End head */ 03841 p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */ 03842 p[7] = (BYTE)e_cyl; /* End cylinder */ 03843 ST_DWORD(p + 8, s_part); /* Start sector in LBA */ 03844 ST_DWORD(p + 12, sz_part); /* Partition size */ 03845 03846 /* Next partition */ 03847 b_cyl += p_cyl; 03848 } 03849 ST_WORD(p, 0xAA55); 03850 03851 /* Write it to the MBR */ 03852 return (disk_write(pdrv, buf, 0, 1) || disk_ioctl(pdrv, CTRL_SYNC, 0)) ? FR_DISK_ERR : FR_OK; 03853 } 03854 03855 03856 #endif /* _MULTI_PARTITION == 2 */ 03857 #endif /* _USE_MKFS && !_FS_READONLY */ 03858 03859 03860 03861 03862 #if _USE_STRFUNC 03863 /*-----------------------------------------------------------------------*/ 03864 /* Get a string from the file */ 03865 /*-----------------------------------------------------------------------*/ 03866 TCHAR* f_gets ( 03867 TCHAR* buff, /* Pointer to the string buffer to read */ 03868 int len, /* Size of string buffer (characters) */ 03869 FIL* fil /* Pointer to the file object */ 03870 ) 03871 { 03872 int n = 0; 03873 TCHAR c, *p = buff; 03874 BYTE s[2]; 03875 UINT rc; 03876 03877 03878 while (n < len - 1) { /* Read bytes until buffer gets filled */ 03879 f_read(fil, s, 1, &rc); 03880 if (rc != 1) break; /* Break on EOF or error */ 03881 c = s[0]; 03882 #if _LFN_UNICODE /* Read a character in UTF-8 encoding */ 03883 if (c >= 0x80) { 03884 if (c < 0xC0) continue; /* Skip stray trailer */ 03885 if (c < 0xE0) { /* Two-byte sequense */ 03886 f_read(fil, s, 1, &rc); 03887 if (rc != 1) break; 03888 c = ((c & 0x1F) << 6) | (s[0] & 0x3F); 03889 if (c < 0x80) c = '?'; 03890 } else { 03891 if (c < 0xF0) { /* Three-byte sequense */ 03892 f_read(fil, s, 2, &rc); 03893 if (rc != 2) break; 03894 c = (c << 12) | ((s[0] & 0x3F) << 6) | (s[1] & 0x3F); 03895 if (c < 0x800) c = '?'; 03896 } else { /* Reject four-byte sequense */ 03897 c = '?'; 03898 } 03899 } 03900 } 03901 #endif 03902 #if _USE_STRFUNC >= 2 03903 if (c == '\r') continue; /* Strip '\r' */ 03904 #endif 03905 *p++ = c; 03906 n++; 03907 if (c == '\n') break; /* Break on EOL */ 03908 } 03909 *p = 0; 03910 return n ? buff : 0; /* When no data read (eof or error), return with error. */ 03911 } 03912 03913 03914 03915 #if !_FS_READONLY 03916 #include <stdarg.h> 03917 /*-----------------------------------------------------------------------*/ 03918 /* Put a character to the file */ 03919 /*-----------------------------------------------------------------------*/ 03920 int f_putc ( 03921 TCHAR c, /* A character to be output */ 03922 FIL* fil /* Pointer to the file object */ 03923 ) 03924 { 03925 UINT bw, btw; 03926 BYTE s[3]; 03927 03928 03929 #if _USE_STRFUNC >= 2 03930 if (c == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */ 03931 #endif 03932 03933 #if _LFN_UNICODE /* Write the character in UTF-8 encoding */ 03934 if (c < 0x80) { /* 7-bit */ 03935 s[0] = (BYTE)c; 03936 btw = 1; 03937 } else { 03938 if (c < 0x800) { /* 11-bit */ 03939 s[0] = (BYTE)(0xC0 | (c >> 6)); 03940 s[1] = (BYTE)(0x80 | (c & 0x3F)); 03941 btw = 2; 03942 } else { /* 16-bit */ 03943 s[0] = (BYTE)(0xE0 | (c >> 12)); 03944 s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F)); 03945 s[2] = (BYTE)(0x80 | (c & 0x3F)); 03946 btw = 3; 03947 } 03948 } 03949 #else /* Write the character without conversion */ 03950 s[0] = (BYTE)c; 03951 btw = 1; 03952 #endif 03953 f_write(fil, s, btw, &bw); /* Write the char to the file */ 03954 return (bw == btw) ? 1 : EOF; /* Return the result */ 03955 } 03956 03957 03958 03959 03960 /*-----------------------------------------------------------------------*/ 03961 /* Put a string to the file */ 03962 /*-----------------------------------------------------------------------*/ 03963 int f_puts ( 03964 const TCHAR* str, /* Pointer to the string to be output */ 03965 FIL* fil /* Pointer to the file object */ 03966 ) 03967 { 03968 int n; 03969 03970 03971 for (n = 0; *str; str++, n++) { 03972 if (f_putc(*str, fil) == EOF) return EOF; 03973 } 03974 return n; 03975 } 03976 03977 03978 03979 03980 /*-----------------------------------------------------------------------*/ 03981 /* Put a formatted string to the file */ 03982 /*-----------------------------------------------------------------------*/ 03983 int f_printf ( 03984 FIL* fil, /* Pointer to the file object */ 03985 const TCHAR* str, /* Pointer to the format string */ 03986 ... /* Optional arguments... */ 03987 ) 03988 { 03989 va_list arp; 03990 BYTE f, r; 03991 UINT i, j, w; 03992 ULONG v; 03993 TCHAR c, d, s[16], *p; 03994 int res, chc, cc; 03995 03996 03997 va_start(arp, str); 03998 03999 for (cc = res = 0; cc != EOF; res += cc) { 04000 c = *str++; 04001 if (c == 0) break; /* End of string */ 04002 if (c != '%') { /* Non escape character */ 04003 cc = f_putc(c, fil); 04004 if (cc != EOF) cc = 1; 04005 continue; 04006 } 04007 w = f = 0; 04008 c = *str++; 04009 if (c == '0') { /* Flag: '0' padding */ 04010 f = 1; c = *str++; 04011 } else { 04012 if (c == '-') { /* Flag: left justified */ 04013 f = 2; c = *str++; 04014 } 04015 } 04016 while (IsDigit(c)) { /* Precision */ 04017 w = w * 10 + c - '0'; 04018 c = *str++; 04019 } 04020 if (c == 'l' || c == 'L') { /* Prefix: Size is long int */ 04021 f |= 4; c = *str++; 04022 } 04023 if (!c) break; 04024 d = c; 04025 if (IsLower(d)) d -= 0x20; 04026 switch (d) { /* Type is... */ 04027 case 'S' : /* String */ 04028 p = va_arg(arp, TCHAR*); 04029 for (j = 0; p[j]; j++) ; 04030 chc = 0; 04031 if (!(f & 2)) { 04032 while (j++ < w) chc += (cc = f_putc(' ', fil)); 04033 } 04034 chc += (cc = f_puts(p, fil)); 04035 while (j++ < w) chc += (cc = f_putc(' ', fil)); 04036 if (cc != EOF) cc = chc; 04037 continue; 04038 case 'C' : /* Character */ 04039 cc = f_putc((TCHAR)va_arg(arp, int), fil); continue; 04040 case 'B' : /* Binary */ 04041 r = 2; break; 04042 case 'O' : /* Octal */ 04043 r = 8; break; 04044 case 'D' : /* Signed decimal */ 04045 case 'U' : /* Unsigned decimal */ 04046 r = 10; break; 04047 case 'X' : /* Hexdecimal */ 04048 r = 16; break; 04049 default: /* Unknown type (passthrough) */ 04050 cc = f_putc(c, fil); continue; 04051 } 04052 04053 /* Get an argument and put it in numeral */ 04054 v = (f & 4) ? (ULONG)va_arg(arp, long) : ((d == 'D') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int)); 04055 if (d == 'D' && (v & 0x80000000)) { 04056 v = 0 - v; 04057 f |= 8; 04058 } 04059 i = 0; 04060 do { 04061 d = (TCHAR)(v % r); v /= r; 04062 if (d > 9) d += (c == 'x') ? 0x27 : 0x07; 04063 s[i++] = d + '0'; 04064 } while (v && i < sizeof(s) / sizeof(s[0])); 04065 if (f & 8) s[i++] = '-'; 04066 j = i; d = (f & 1) ? '0' : ' '; 04067 res = 0; 04068 while (!(f & 2) && j++ < w) res += (cc = f_putc(d, fil)); 04069 do res += (cc = f_putc(s[--i], fil)); while(i); 04070 while (j++ < w) res += (cc = f_putc(' ', fil)); 04071 if (cc != EOF) cc = res; 04072 } 04073 04074 va_end(arp); 04075 return (cc == EOF) ? cc : res; 04076 } 04077 04078 #endif /* !_FS_READONLY */ 04079 #endif /* _USE_STRFUNC */ 04080 04081
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