WILLY BAYOT
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stm32_adafruit
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ff.c
00001 /*----------------------------------------------------------------------------/ 00002 / FatFs - FAT file system module R0.10 (C)ChaN, 2013 00003 /-----------------------------------------------------------------------------/ 00004 / FatFs module is a generic FAT file system module for small embedded systems. 00005 / This is a free software that opened for education, research and commercial 00006 / developments under license policy of following terms. 00007 / 00008 / Copyright (C) 2013, ChaN, all right reserved. 00009 / 00010 / * The FatFs module is a free software and there is NO WARRANTY. 00011 / * No restriction on use. You can use, modify and redistribute it for 00012 / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY. 00013 / * Redistributions of source code must retain the above copyright notice. 00014 / 00015 /-----------------------------------------------------------------------------/ 00016 / Feb 26,'06 R0.00 Prototype. 00017 / 00018 / Apr 29,'06 R0.01 First stable version. 00019 / 00020 / Jun 01,'06 R0.02 Added FAT12 support. 00021 / Removed unbuffered mode. 00022 / Fixed a problem on small (<32M) partition. 00023 / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM). 00024 / 00025 / Sep 22,'06 R0.03 Added f_rename(). 00026 / Changed option _FS_MINIMUM to _FS_MINIMIZE. 00027 / Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast. 00028 / Fixed f_mkdir() creates incorrect directory on FAT32. 00029 / 00030 / Feb 04,'07 R0.04 Supported multiple drive system. 00031 / Changed some interfaces for multiple drive system. 00032 / Changed f_mountdrv() to f_mount(). 00033 / Added f_mkfs(). 00034 / Apr 01,'07 R0.04a Supported multiple partitions on a physical drive. 00035 / Added a capability of extending file size to f_lseek(). 00036 / Added minimization level 3. 00037 / Fixed an endian sensitive code in f_mkfs(). 00038 / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG. 00039 / Added FSINFO support. 00040 / Fixed DBCS name can result FR_INVALID_NAME. 00041 / Fixed short seek (<= csize) collapses the file object. 00042 / 00043 / Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs(). 00044 / Fixed f_mkfs() on FAT32 creates incorrect FSINFO. 00045 / Fixed f_mkdir() on FAT32 creates incorrect directory. 00046 / Feb 03,'08 R0.05a Added f_truncate() and f_utime(). 00047 / Fixed off by one error at FAT sub-type determination. 00048 / Fixed btr in f_read() can be mistruncated. 00049 / Fixed cached sector is not flushed when create and close without write. 00050 / 00051 / Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets(). 00052 / Improved performance of f_lseek() on moving to the same or following cluster. 00053 / 00054 / Apr 01,'09 R0.07 Merged Tiny-FatFs as a configuration option. (_FS_TINY) 00055 / Added long file name feature. 00056 / Added multiple code page feature. 00057 / Added re-entrancy for multitask operation. 00058 / Added auto cluster size selection to f_mkfs(). 00059 / Added rewind option to f_readdir(). 00060 / Changed result code of critical errors. 00061 / Renamed string functions to avoid name collision. 00062 / Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg. 00063 / Added multiple sector size feature. 00064 / Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error. 00065 / Fixed wrong cache control in f_lseek(). 00066 / Added relative path feature. 00067 / Added f_chdir() and f_chdrive(). 00068 / Added proper case conversion to extended character. 00069 / Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h. 00070 / Fixed f_unlink() fails to remove a sub-directory on _FS_RPATH. 00071 / Fixed name matching error on the 13 character boundary. 00072 / Added a configuration option, _LFN_UNICODE. 00073 / Changed f_readdir() to return the SFN with always upper case on non-LFN cfg. 00074 / 00075 / May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN = 3) 00076 / Added file lock feature. (_FS_SHARE) 00077 / Added fast seek feature. (_USE_FASTSEEK) 00078 / Changed some types on the API, XCHAR->TCHAR. 00079 / Changed .fname in the FILINFO structure on Unicode cfg. 00080 / String functions support UTF-8 encoding files on Unicode cfg. 00081 / Aug 16,'10 R0.08a Added f_getcwd(). 00082 / Added sector erase feature. (_USE_ERASE) 00083 / Moved file lock semaphore table from fs object to the bss. 00084 / Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'. 00085 / Fixed f_mkfs() creates wrong FAT32 volume. 00086 / Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write(). 00087 / f_lseek() reports required table size on creating CLMP. 00088 / Extended format syntax of f_printf(). 00089 / Ignores duplicated directory separators in given path name. 00090 / 00091 / Sep 06,'11 R0.09 f_mkfs() supports multiple partition to complete the multiple partition feature. 00092 / Added f_fdisk(). 00093 / Aug 27,'12 R0.09a Changed f_open() and f_opendir() reject null object pointer to avoid crash. 00094 / Changed option name _FS_SHARE to _FS_LOCK. 00095 / Fixed assertion failure due to OS/2 EA on FAT12/16 volume. 00096 / Jan 24,'13 R0.09b Added f_setlabel() and f_getlabel(). 00097 / 00098 / Oct 02,'13 R0.10 Added selection of character encoding on the file. (_STRF_ENCODE) 00099 / Added f_closedir(). 00100 / Added forced full FAT scan for f_getfree(). (_FS_NOFSINFO) 00101 / Added forced mount feature with changes of f_mount(). 00102 / Improved behavior of volume auto detection. 00103 / Improved write throughput of f_puts() and f_printf(). 00104 / Changed argument of f_chdrive(), f_mkfs(), disk_read() and disk_write(). 00105 / Fixed f_write() can be truncated when the file size is close to 4GB. 00106 / Fixed f_open(), f_mkdir() and f_setlabel() can return incorrect error code. 00107 /---------------------------------------------------------------------------*/ 00108 00109 #include "ff.h" /* Declarations of FatFs API */ 00110 #include "diskio.h" /* Declarations of disk I/O functions */ 00111 00112 00113 /*-------------------------------------------------------------------------- 00114 00115 Module Private Definitions 00116 00117 ---------------------------------------------------------------------------*/ 00118 00119 #if _FATFS != 80960 /* Revision ID */ 00120 #error Wrong include file (ff.h). 00121 #endif 00122 00123 00124 /* Definitions on sector size */ 00125 #if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096 00126 #error Wrong sector size. 00127 #endif 00128 #if _MAX_SS != 512 00129 #define SS(fs) ((fs)->ssize) /* Variable sector size */ 00130 #else 00131 #define SS(fs) 512U /* Fixed sector size */ 00132 #endif 00133 00134 00135 /* Reentrancy related */ 00136 #if _FS_REENTRANT 00137 #if _USE_LFN == 1 00138 #error Static LFN work area cannot be used at thread-safe configuration. 00139 #endif 00140 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; } 00141 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } 00142 #else 00143 #define ENTER_FF(fs) 00144 #define LEAVE_FF(fs, res) return res 00145 #endif 00146 00147 #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); } 00148 00149 00150 /* File access control feature */ 00151 #if _FS_LOCK 00152 #if _FS_READONLY 00153 #error _FS_LOCK must be 0 at read-only cfg. 00154 #endif 00155 typedef struct { 00156 FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */ 00157 DWORD clu; /* Object ID 2, directory */ 00158 WORD idx; /* Object ID 3, directory index */ 00159 WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */ 00160 } FILESEM; 00161 #endif 00162 00163 00164 00165 /* DBCS code ranges and SBCS extend character conversion table */ 00166 00167 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */ 00168 #define _DF1S 0x81 /* DBC 1st byte range 1 start */ 00169 #define _DF1E 0x9F /* DBC 1st byte range 1 end */ 00170 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */ 00171 #define _DF2E 0xFC /* DBC 1st byte range 2 end */ 00172 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */ 00173 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */ 00174 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */ 00175 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */ 00176 00177 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */ 00178 #define _DF1S 0x81 00179 #define _DF1E 0xFE 00180 #define _DS1S 0x40 00181 #define _DS1E 0x7E 00182 #define _DS2S 0x80 00183 #define _DS2E 0xFE 00184 00185 #elif _CODE_PAGE == 949 /* Korean */ 00186 #define _DF1S 0x81 00187 #define _DF1E 0xFE 00188 #define _DS1S 0x41 00189 #define _DS1E 0x5A 00190 #define _DS2S 0x61 00191 #define _DS2E 0x7A 00192 #define _DS3S 0x81 00193 #define _DS3E 0xFE 00194 00195 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */ 00196 #define _DF1S 0x81 00197 #define _DF1E 0xFE 00198 #define _DS1S 0x40 00199 #define _DS1E 0x7E 00200 #define _DS2S 0xA1 00201 #define _DS2E 0xFE 00202 00203 #elif _CODE_PAGE == 437 /* U.S. (OEM) */ 00204 #define _DF1S 0 00205 #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, \ 00206 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, \ 00207 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, \ 00208 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} 00209 00210 #elif _CODE_PAGE == 720 /* Arabic (OEM) */ 00211 #define _DF1S 0 00212 #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, \ 00213 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, \ 00214 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, \ 00215 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} 00216 00217 #elif _CODE_PAGE == 737 /* Greek (OEM) */ 00218 #define _DF1S 0 00219 #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, \ 00220 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, \ 00221 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, \ 00222 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} 00223 00224 #elif _CODE_PAGE == 775 /* Baltic (OEM) */ 00225 #define _DF1S 0 00226 #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, \ 00227 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, \ 00228 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, \ 00229 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} 00230 00231 #elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */ 00232 #define _DF1S 0 00233 #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, \ 00234 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, \ 00235 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, \ 00236 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} 00237 00238 #elif _CODE_PAGE == 852 /* Latin 2 (OEM) */ 00239 #define _DF1S 0 00240 #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, \ 00241 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, \ 00242 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, \ 00243 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} 00244 00245 #elif _CODE_PAGE == 855 /* Cyrillic (OEM) */ 00246 #define _DF1S 0 00247 #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, \ 00248 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, \ 00249 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, \ 00250 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} 00251 00252 #elif _CODE_PAGE == 857 /* Turkish (OEM) */ 00253 #define _DF1S 0 00254 #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, \ 00255 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, \ 00256 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, \ 00257 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} 00258 00259 #elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */ 00260 #define _DF1S 0 00261 #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, \ 00262 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, \ 00263 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, \ 00264 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} 00265 00266 #elif _CODE_PAGE == 862 /* Hebrew (OEM) */ 00267 #define _DF1S 0 00268 #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, \ 00269 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, \ 00270 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, \ 00271 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} 00272 00273 #elif _CODE_PAGE == 866 /* Russian (OEM) */ 00274 #define _DF1S 0 00275 #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, \ 00276 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, \ 00277 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, \ 00278 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} 00279 00280 #elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */ 00281 #define _DF1S 0 00282 #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, \ 00283 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, \ 00284 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, \ 00285 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} 00286 00287 #elif _CODE_PAGE == 1250 /* Central Europe (Windows) */ 00288 #define _DF1S 0 00289 #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, \ 00290 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, \ 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 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} 00293 00294 #elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */ 00295 #define _DF1S 0 00296 #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, \ 00297 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, \ 00298 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, \ 00299 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} 00300 00301 #elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */ 00302 #define _DF1S 0 00303 #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, \ 00304 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, \ 00305 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, \ 00306 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} 00307 00308 #elif _CODE_PAGE == 1253 /* Greek (Windows) */ 00309 #define _DF1S 0 00310 #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, \ 00311 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, \ 00312 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, \ 00313 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} 00314 00315 #elif _CODE_PAGE == 1254 /* Turkish (Windows) */ 00316 #define _DF1S 0 00317 #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, \ 00318 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, \ 00319 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, \ 00320 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} 00321 00322 #elif _CODE_PAGE == 1255 /* Hebrew (Windows) */ 00323 #define _DF1S 0 00324 #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, \ 00325 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, \ 00326 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, \ 00327 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} 00328 00329 #elif _CODE_PAGE == 1256 /* Arabic (Windows) */ 00330 #define _DF1S 0 00331 #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, \ 00332 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, \ 00333 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, \ 00334 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} 00335 00336 #elif _CODE_PAGE == 1257 /* Baltic (Windows) */ 00337 #define _DF1S 0 00338 #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, \ 00339 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, \ 00340 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, \ 00341 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} 00342 00343 #elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */ 00344 #define _DF1S 0 00345 #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, \ 00346 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, \ 00347 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, \ 00348 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} 00349 00350 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */ 00351 #if _USE_LFN 00352 #error Cannot use LFN feature without valid code page. 00353 #endif 00354 #define _DF1S 0 00355 00356 #else 00357 #error Unknown code page 00358 00359 #endif 00360 00361 00362 /* Character code support macros */ 00363 #define IsUpper(c) (((c)>='A')&&((c)<='Z')) 00364 #define IsLower(c) (((c)>='a')&&((c)<='z')) 00365 #define IsDigit(c) (((c)>='0')&&((c)<='9')) 00366 00367 #if _DF1S /* Code page is DBCS */ 00368 00369 #ifdef _DF2S /* Two 1st byte areas */ 00370 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E)) 00371 #else /* One 1st byte area */ 00372 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) 00373 #endif 00374 00375 #ifdef _DS3S /* Three 2nd byte areas */ 00376 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E)) 00377 #else /* Two 2nd byte areas */ 00378 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E)) 00379 #endif 00380 00381 #else /* Code page is SBCS */ 00382 00383 #define IsDBCS1(c) 0 00384 #define IsDBCS2(c) 0 00385 00386 #endif /* _DF1S */ 00387 00388 00389 /* Name status flags */ 00390 #define NS 11 /* Index of name status byte in fn[] */ 00391 #define NS_LOSS 0x01 /* Out of 8.3 format */ 00392 #define NS_LFN 0x02 /* Force to create LFN entry */ 00393 #define NS_LAST 0x04 /* Last segment */ 00394 #define NS_BODY 0x08 /* Lower case flag (body) */ 00395 #define NS_EXT 0x10 /* Lower case flag (ext) */ 00396 #define NS_DOT 0x20 /* Dot entry */ 00397 00398 00399 /* FAT sub-type boundaries */ 00400 #define MIN_FAT16 4086U /* Minimum number of clusters for FAT16 */ 00401 #define MIN_FAT32 65526U /* Minimum number of clusters for FAT32 */ 00402 00403 00404 /* FatFs refers the members in the FAT structures as byte array instead of 00405 / structure member because the structure is not binary compatible between 00406 / different platforms */ 00407 00408 #define BS_jmpBoot 0 /* Jump instruction (3) */ 00409 #define BS_OEMName 3 /* OEM name (8) */ 00410 #define BPB_BytsPerSec 11 /* Sector size [byte] (2) */ 00411 #define BPB_SecPerClus 13 /* Cluster size [sector] (1) */ 00412 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */ 00413 #define BPB_NumFATs 16 /* Number of FAT copies (1) */ 00414 #define BPB_RootEntCnt 17 /* Number of root directory entries for FAT12/16 (2) */ 00415 #define BPB_TotSec16 19 /* Volume size [sector] (2) */ 00416 #define BPB_Media 21 /* Media descriptor (1) */ 00417 #define BPB_FATSz16 22 /* FAT size [sector] (2) */ 00418 #define BPB_SecPerTrk 24 /* Track size [sector] (2) */ 00419 #define BPB_NumHeads 26 /* Number of heads (2) */ 00420 #define BPB_HiddSec 28 /* Number of special hidden sectors (4) */ 00421 #define BPB_TotSec32 32 /* Volume size [sector] (4) */ 00422 #define BS_DrvNum 36 /* Physical drive number (2) */ 00423 #define BS_BootSig 38 /* Extended boot signature (1) */ 00424 #define BS_VolID 39 /* Volume serial number (4) */ 00425 #define BS_VolLab 43 /* Volume label (8) */ 00426 #define BS_FilSysType 54 /* File system type (1) */ 00427 #define BPB_FATSz32 36 /* FAT size [sector] (4) */ 00428 #define BPB_ExtFlags 40 /* Extended flags (2) */ 00429 #define BPB_FSVer 42 /* File system version (2) */ 00430 #define BPB_RootClus 44 /* Root directory first cluster (4) */ 00431 #define BPB_FSInfo 48 /* Offset of FSINFO sector (2) */ 00432 #define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */ 00433 #define BS_DrvNum32 64 /* Physical drive number (2) */ 00434 #define BS_BootSig32 66 /* Extended boot signature (1) */ 00435 #define BS_VolID32 67 /* Volume serial number (4) */ 00436 #define BS_VolLab32 71 /* Volume label (8) */ 00437 #define BS_FilSysType32 82 /* File system type (1) */ 00438 #define FSI_LeadSig 0 /* FSI: Leading signature (4) */ 00439 #define FSI_StrucSig 484 /* FSI: Structure signature (4) */ 00440 #define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */ 00441 #define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */ 00442 #define MBR_Table 446 /* MBR: Partition table offset (2) */ 00443 #define SZ_PTE 16 /* MBR: Size of a partition table entry */ 00444 #define BS_55AA 510 /* Boot sector signature (2) */ 00445 00446 #define DIR_Name 0 /* Short file name (11) */ 00447 #define DIR_Attr 11 /* Attribute (1) */ 00448 #define DIR_NTres 12 /* NT flag (1) */ 00449 #define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */ 00450 #define DIR_CrtTime 14 /* Created time (2) */ 00451 #define DIR_CrtDate 16 /* Created date (2) */ 00452 #define DIR_LstAccDate 18 /* Last accessed date (2) */ 00453 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */ 00454 #define DIR_WrtTime 22 /* Modified time (2) */ 00455 #define DIR_WrtDate 24 /* Modified date (2) */ 00456 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */ 00457 #define DIR_FileSize 28 /* File size (4) */ 00458 #define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */ 00459 #define LDIR_Attr 11 /* LFN attribute (1) */ 00460 #define LDIR_Type 12 /* LFN type (1) */ 00461 #define LDIR_Chksum 13 /* Sum of corresponding SFN entry */ 00462 #define LDIR_FstClusLO 26 /* Filled by zero (0) */ 00463 #define SZ_DIR 32 /* Size of a directory entry */ 00464 #define LLE 0x40 /* Last long entry flag in LDIR_Ord */ 00465 #define DDE 0xE5 /* Deleted directory entry mark in DIR_Name[0] */ 00466 #define NDDE 0x05 /* Replacement of the character collides with DDE */ 00467 00468 00469 /*------------------------------------------------------------*/ 00470 /* Module private work area */ 00471 /*------------------------------------------------------------*/ 00472 /* Note that uninitialized variables with static duration are 00473 / zeroed/nulled at start-up. If not, the compiler or start-up 00474 / routine is out of ANSI-C standard. 00475 */ 00476 00477 #if _VOLUMES 00478 static 00479 FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */ 00480 #else 00481 #error Number of volumes must not be 0. 00482 #endif 00483 00484 static 00485 WORD Fsid; /* File system mount ID */ 00486 00487 #if _FS_RPATH && _VOLUMES >= 2 00488 static 00489 BYTE CurrVol; /* Current drive */ 00490 #endif 00491 00492 #if _FS_LOCK 00493 static 00494 FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */ 00495 #endif 00496 00497 #if _USE_LFN == 0 /* No LFN feature */ 00498 #define DEF_NAMEBUF BYTE sfn[12] 00499 #define INIT_BUF(dobj) (dobj).fn = sfn 00500 #define FREE_BUF() 00501 00502 #elif _USE_LFN == 1 /* LFN feature with static working buffer */ 00503 static 00504 WCHAR LfnBuf[_MAX_LFN+1]; 00505 #define DEF_NAMEBUF BYTE sfn[12] 00506 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; } 00507 #define FREE_BUF() 00508 00509 #elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */ 00510 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1] 00511 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; } 00512 #define FREE_BUF() 00513 00514 #elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */ 00515 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn 00516 #define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \ 00517 if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \ 00518 (dobj).lfn = lfn; (dobj).fn = sfn; } 00519 #define FREE_BUF() ff_memfree(lfn) 00520 00521 #else 00522 #error Wrong LFN configuration. 00523 #endif 00524 00525 00526 #ifdef _EXCVT 00527 static 00528 const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for extended characters */ 00529 #endif 00530 00531 00532 00533 00534 00535 00536 /*-------------------------------------------------------------------------- 00537 00538 Module Private Functions 00539 00540 ---------------------------------------------------------------------------*/ 00541 DWORD clust2sect (FATFS* fs, DWORD clst); 00542 DWORD get_fat (FATFS* fs, DWORD clst); 00543 00544 #if !_FS_READONLY 00545 FRESULT put_fat (FATFS* fs, DWORD clst, DWORD val); 00546 #endif /* !_FS_READONLY */ 00547 00548 #if _USE_LFN 00549 void gen_numname (BYTE* dst, const BYTE* src, const WCHAR* lfn, WORD seq); 00550 #endif /* !_USE_LFN */ 00551 00552 /*-----------------------------------------------------------------------*/ 00553 /* String functions */ 00554 /*-----------------------------------------------------------------------*/ 00555 00556 /* Copy memory to memory */ 00557 static 00558 void mem_cpy (void* dst, const void* src, UINT cnt) { 00559 BYTE *d = (BYTE*)dst; 00560 const BYTE *s = (const BYTE*)src; 00561 00562 #if _WORD_ACCESS == 1 00563 while (cnt >= sizeof (int)) { 00564 *(int*)d = *(int*)s; 00565 d += sizeof (int); s += sizeof (int); 00566 cnt -= sizeof (int); 00567 } 00568 #endif 00569 while (cnt--) 00570 *d++ = *s++; 00571 } 00572 00573 /* Fill memory */ 00574 static 00575 void mem_set (void* dst, int val, UINT cnt) { 00576 BYTE *d = (BYTE*)dst; 00577 00578 while (cnt--) 00579 *d++ = (BYTE)val; 00580 } 00581 00582 /* Compare memory to memory */ 00583 static 00584 int mem_cmp (const void* dst, const void* src, UINT cnt) { 00585 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; 00586 int r = 0; 00587 00588 while (cnt-- && (r = *d++ - *s++) == 0) ; 00589 return r; 00590 } 00591 00592 /* Check if chr is contained in the string */ 00593 static 00594 int chk_chr (const char* str, int chr) { 00595 while (*str && *str != chr) str++; 00596 return *str; 00597 } 00598 00599 00600 00601 00602 /*-----------------------------------------------------------------------*/ 00603 /* Request/Release grant to access the volume */ 00604 /*-----------------------------------------------------------------------*/ 00605 #if _FS_REENTRANT 00606 static 00607 int lock_fs ( 00608 FATFS* fs /* File system object */ 00609 ) 00610 { 00611 return ff_req_grant(fs->sobj); 00612 } 00613 00614 00615 static 00616 void unlock_fs ( 00617 FATFS* fs, /* File system object */ 00618 FRESULT res /* Result code to be returned */ 00619 ) 00620 { 00621 if (fs && 00622 res != FR_NOT_ENABLED && 00623 res != FR_INVALID_DRIVE && 00624 res != FR_INVALID_OBJECT && 00625 res != FR_TIMEOUT) { 00626 ff_rel_grant(fs->sobj); 00627 } 00628 } 00629 #endif 00630 00631 00632 00633 00634 /*-----------------------------------------------------------------------*/ 00635 /* File lock control functions */ 00636 /*-----------------------------------------------------------------------*/ 00637 #if _FS_LOCK 00638 00639 static 00640 FRESULT chk_lock ( /* Check if the file can be accessed */ 00641 DIR* dp, /* Directory object pointing the file to be checked */ 00642 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ 00643 ) 00644 { 00645 UINT i, be; 00646 00647 /* Search file semaphore table */ 00648 for (i = be = 0; i < _FS_LOCK; i++) { 00649 if (Files[i].fs) { /* Existing entry */ 00650 if (Files[i].fs == dp->fs && /* Check if the object matched with an open object */ 00651 Files[i].clu == dp->sclust && 00652 Files[i].idx == dp->index) break; 00653 } else { /* Blank entry */ 00654 be = 1; 00655 } 00656 } 00657 if (i == _FS_LOCK) /* The object is not opened */ 00658 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */ 00659 00660 /* The object has been opened. Reject any open against writing file and all write mode open */ 00661 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK; 00662 } 00663 00664 00665 static 00666 int enq_lock (void) /* Check if an entry is available for a new object */ 00667 { 00668 UINT i; 00669 00670 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; 00671 return (i == _FS_LOCK) ? 0 : 1; 00672 } 00673 00674 00675 static 00676 UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */ 00677 DIR* dp, /* Directory object pointing the file to register or increment */ 00678 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ 00679 ) 00680 { 00681 UINT i; 00682 00683 00684 for (i = 0; i < _FS_LOCK; i++) { /* Find the object */ 00685 if (Files[i].fs == dp->fs && 00686 Files[i].clu == dp->sclust && 00687 Files[i].idx == dp->index) break; 00688 } 00689 00690 if (i == _FS_LOCK) { /* Not opened. Register it as new. */ 00691 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ; 00692 if (i == _FS_LOCK) return 0; /* No free entry to register (int err) */ 00693 Files[i].fs = dp->fs; 00694 Files[i].clu = dp->sclust; 00695 Files[i].idx = dp->index; 00696 Files[i].ctr = 0; 00697 } 00698 00699 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */ 00700 00701 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */ 00702 00703 return i + 1; 00704 } 00705 00706 00707 static 00708 FRESULT dec_lock ( /* Decrement object open counter */ 00709 UINT i /* Semaphore index (1..) */ 00710 ) 00711 { 00712 WORD n; 00713 FRESULT res; 00714 00715 00716 if (--i < _FS_LOCK) { /* Shift index number origin from 0 */ 00717 n = Files[i].ctr; 00718 if (n == 0x100) n = 0; /* If write mode open, delete the entry */ 00719 if (n) n--; /* Decrement read mode open count */ 00720 Files[i].ctr = n; 00721 if (!n) Files[i].fs = 0; /* Delete the entry if open count gets zero */ 00722 res = FR_OK; 00723 } else { 00724 res = FR_INT_ERR; /* Invalid index nunber */ 00725 } 00726 return res; 00727 } 00728 00729 00730 static 00731 void clear_lock ( /* Clear lock entries of the volume */ 00732 FATFS *fs 00733 ) 00734 { 00735 UINT i; 00736 00737 for (i = 0; i < _FS_LOCK; i++) { 00738 if (Files[i].fs == fs) Files[i].fs = 0; 00739 } 00740 } 00741 #endif 00742 00743 00744 00745 00746 /*-----------------------------------------------------------------------*/ 00747 /* Move/Flush disk access window in the file system object */ 00748 /*-----------------------------------------------------------------------*/ 00749 #if !_FS_READONLY 00750 static 00751 FRESULT sync_window ( 00752 FATFS* fs /* File system object */ 00753 ) 00754 { 00755 DWORD wsect; 00756 UINT nf; 00757 00758 00759 if (fs->wflag) { /* Write back the sector if it is dirty */ 00760 wsect = fs->winsect; /* Current sector number */ 00761 if (disk_write(fs->drv, fs->win.d8, wsect, 1)) 00762 return FR_DISK_ERR; 00763 fs->wflag = 0; 00764 if (wsect - fs->fatbase < fs->fsize) { /* Is it in the FAT area? */ 00765 for (nf = fs->n_fats; nf >= 2; nf--) { /* Reflect the change to all FAT copies */ 00766 wsect += fs->fsize; 00767 disk_write(fs->drv, fs->win.d8, wsect, 1); 00768 } 00769 } 00770 } 00771 return FR_OK; 00772 } 00773 #endif 00774 00775 00776 static 00777 FRESULT move_window ( 00778 FATFS* fs, /* File system object */ 00779 DWORD sector /* Sector number to make appearance in the fs->win.d8[] */ 00780 ) 00781 { 00782 if (sector != fs->winsect) { /* Changed current window */ 00783 #if !_FS_READONLY 00784 if (sync_window(fs) != FR_OK) 00785 return FR_DISK_ERR; 00786 #endif 00787 if (disk_read(fs->drv, fs->win.d8, sector, 1)) 00788 return FR_DISK_ERR; 00789 fs->winsect = sector; 00790 } 00791 00792 return FR_OK; 00793 } 00794 00795 00796 00797 00798 /*-----------------------------------------------------------------------*/ 00799 /* Synchronize file system and strage device */ 00800 /*-----------------------------------------------------------------------*/ 00801 #if !_FS_READONLY 00802 static 00803 FRESULT sync_fs ( /* FR_OK: successful, FR_DISK_ERR: failed */ 00804 FATFS* fs /* File system object */ 00805 ) 00806 { 00807 FRESULT res; 00808 00809 00810 res = sync_window(fs); 00811 if (res == FR_OK) { 00812 /* Update FSINFO sector if needed */ 00813 if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) { 00814 /* Create FSINFO structure */ 00815 mem_set(fs->win.d8, 0, SS(fs)); 00816 ST_WORD(fs->win.d8+BS_55AA, 0xAA55); 00817 ST_DWORD(fs->win.d8+FSI_LeadSig, 0x41615252); 00818 ST_DWORD(fs->win.d8+FSI_StrucSig, 0x61417272); 00819 ST_DWORD(fs->win.d8+FSI_Free_Count, fs->free_clust); 00820 ST_DWORD(fs->win.d8+FSI_Nxt_Free, fs->last_clust); 00821 /* Write it into the FSINFO sector */ 00822 fs->winsect = fs->volbase + 1; 00823 disk_write(fs->drv, fs->win.d8, fs->winsect, 1); 00824 fs->fsi_flag = 0; 00825 } 00826 /* Make sure that no pending write process in the physical drive */ 00827 if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK) 00828 res = FR_DISK_ERR; 00829 } 00830 00831 return res; 00832 } 00833 #endif 00834 00835 00836 00837 00838 /*-----------------------------------------------------------------------*/ 00839 /* Get sector# from cluster# */ 00840 /*-----------------------------------------------------------------------*/ 00841 00842 00843 DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */ 00844 FATFS* fs, /* File system object */ 00845 DWORD clst /* Cluster# to be converted */ 00846 ) 00847 { 00848 clst -= 2; 00849 if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */ 00850 return clst * fs->csize + fs->database; 00851 } 00852 00853 00854 00855 00856 /*-----------------------------------------------------------------------*/ 00857 /* FAT access - Read value of a FAT entry */ 00858 /*-----------------------------------------------------------------------*/ 00859 00860 00861 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */ 00862 FATFS* fs, /* File system object */ 00863 DWORD clst /* Cluster# to get the link information */ 00864 ) 00865 { 00866 UINT wc, bc; 00867 BYTE *p; 00868 00869 00870 if (clst < 2 || clst >= fs->n_fatent) /* Check range */ 00871 return 1; 00872 00873 switch (fs->fs_type) { 00874 case FS_FAT12 : 00875 bc = (UINT)clst; bc += bc / 2; 00876 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break; 00877 wc = fs->win.d8[bc % SS(fs)]; bc++; 00878 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break; 00879 wc |= fs->win.d8[bc % SS(fs)] << 8; 00880 return clst & 1 ? wc >> 4 : (wc & 0xFFF); 00881 00882 case FS_FAT16 : 00883 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break; 00884 p = &fs->win.d8[clst * 2 % SS(fs)]; 00885 return LD_WORD(p); 00886 00887 case FS_FAT32 : 00888 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break; 00889 p = &fs->win.d8[clst * 4 % SS(fs)]; 00890 return LD_DWORD(p) & 0x0FFFFFFF; 00891 } 00892 00893 return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */ 00894 } 00895 00896 00897 00898 00899 /*-----------------------------------------------------------------------*/ 00900 /* FAT access - Change value of a FAT entry */ 00901 /*-----------------------------------------------------------------------*/ 00902 #if !_FS_READONLY 00903 00904 FRESULT put_fat ( 00905 FATFS* fs, /* File system object */ 00906 DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */ 00907 DWORD val /* New value to mark the cluster */ 00908 ) 00909 { 00910 UINT bc; 00911 BYTE *p; 00912 FRESULT res; 00913 00914 00915 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ 00916 res = FR_INT_ERR; 00917 00918 } else { 00919 switch (fs->fs_type) { 00920 case FS_FAT12 : 00921 bc = (UINT)clst; bc += bc / 2; 00922 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 00923 if (res != FR_OK) break; 00924 p = &fs->win.d8[bc % SS(fs)]; 00925 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; 00926 bc++; 00927 fs->wflag = 1; 00928 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 00929 if (res != FR_OK) break; 00930 p = &fs->win.d8[bc % SS(fs)]; 00931 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); 00932 break; 00933 00934 case FS_FAT16 : 00935 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); 00936 if (res != FR_OK) break; 00937 p = &fs->win.d8[clst * 2 % SS(fs)]; 00938 ST_WORD(p, (WORD)val); 00939 break; 00940 00941 case FS_FAT32 : 00942 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); 00943 if (res != FR_OK) break; 00944 p = &fs->win.d8[clst * 4 % SS(fs)]; 00945 val |= LD_DWORD(p) & 0xF0000000; 00946 ST_DWORD(p, val); 00947 break; 00948 00949 default : 00950 res = FR_INT_ERR; 00951 } 00952 fs->wflag = 1; 00953 } 00954 00955 return res; 00956 } 00957 #endif /* !_FS_READONLY */ 00958 00959 00960 00961 00962 /*-----------------------------------------------------------------------*/ 00963 /* FAT handling - Remove a cluster chain */ 00964 /*-----------------------------------------------------------------------*/ 00965 #if !_FS_READONLY 00966 static 00967 FRESULT remove_chain ( 00968 FATFS* fs, /* File system object */ 00969 DWORD clst /* Cluster# to remove a chain from */ 00970 ) 00971 { 00972 FRESULT res; 00973 DWORD nxt; 00974 #if _USE_ERASE 00975 DWORD scl = clst, ecl = clst, rt[2]; 00976 #endif 00977 00978 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */ 00979 res = FR_INT_ERR; 00980 00981 } else { 00982 res = FR_OK; 00983 while (clst < fs->n_fatent) { /* Not a last link? */ 00984 nxt = get_fat(fs, clst); /* Get cluster status */ 00985 if (nxt == 0) break; /* Empty cluster? */ 00986 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */ 00987 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */ 00988 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */ 00989 if (res != FR_OK) break; 00990 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSINFO */ 00991 fs->free_clust++; 00992 fs->fsi_flag |= 1; 00993 } 00994 #if _USE_ERASE 00995 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */ 00996 ecl = nxt; 00997 } else { /* End of contiguous clusters */ 00998 rt[0] = clust2sect(fs, scl); /* Start sector */ 00999 rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */ 01000 disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, rt); /* Erase the block */ 01001 scl = ecl = nxt; 01002 } 01003 #endif 01004 clst = nxt; /* Next cluster */ 01005 } 01006 } 01007 01008 return res; 01009 } 01010 #endif 01011 01012 01013 01014 01015 /*-----------------------------------------------------------------------*/ 01016 /* FAT handling - Stretch or Create a cluster chain */ 01017 /*-----------------------------------------------------------------------*/ 01018 #if !_FS_READONLY 01019 static 01020 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ 01021 FATFS* fs, /* File system object */ 01022 DWORD clst /* Cluster# to stretch. 0 means create a new chain. */ 01023 ) 01024 { 01025 DWORD cs, ncl, scl; 01026 FRESULT res; 01027 01028 01029 if (clst == 0) { /* Create a new chain */ 01030 scl = fs->last_clust; /* Get suggested start point */ 01031 if (!scl || scl >= fs->n_fatent) scl = 1; 01032 } 01033 else { /* Stretch the current chain */ 01034 cs = get_fat(fs, clst); /* Check the cluster status */ 01035 if (cs < 2) return 1; /* It is an invalid cluster */ 01036 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */ 01037 scl = clst; 01038 } 01039 01040 ncl = scl; /* Start cluster */ 01041 for (;;) { 01042 ncl++; /* Next cluster */ 01043 if (ncl >= fs->n_fatent) { /* Wrap around */ 01044 ncl = 2; 01045 if (ncl > scl) return 0; /* No free cluster */ 01046 } 01047 cs = get_fat(fs, ncl); /* Get the cluster status */ 01048 if (cs == 0) break; /* Found a free cluster */ 01049 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */ 01050 return cs; 01051 if (ncl == scl) return 0; /* No free cluster */ 01052 } 01053 01054 res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */ 01055 if (res == FR_OK && clst != 0) { 01056 res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */ 01057 } 01058 if (res == FR_OK) { 01059 fs->last_clust = ncl; /* Update FSINFO */ 01060 if (fs->free_clust != 0xFFFFFFFF) { 01061 fs->free_clust--; 01062 fs->fsi_flag |= 1; 01063 } 01064 } else { 01065 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; 01066 } 01067 01068 return ncl; /* Return new cluster number or error code */ 01069 } 01070 #endif /* !_FS_READONLY */ 01071 01072 01073 01074 01075 /*-----------------------------------------------------------------------*/ 01076 /* FAT handling - Convert offset into cluster with link map table */ 01077 /*-----------------------------------------------------------------------*/ 01078 01079 #if _USE_FASTSEEK 01080 static 01081 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ 01082 FIL* fp, /* Pointer to the file object */ 01083 DWORD ofs /* File offset to be converted to cluster# */ 01084 ) 01085 { 01086 DWORD cl, ncl, *tbl; 01087 01088 01089 tbl = fp->cltbl + 1; /* Top of CLMT */ 01090 cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */ 01091 for (;;) { 01092 ncl = *tbl++; /* Number of cluters in the fragment */ 01093 if (!ncl) return 0; /* End of table? (error) */ 01094 if (cl < ncl) break; /* In this fragment? */ 01095 cl -= ncl; tbl++; /* Next fragment */ 01096 } 01097 return cl + *tbl; /* Return the cluster number */ 01098 } 01099 #endif /* _USE_FASTSEEK */ 01100 01101 01102 01103 01104 /*-----------------------------------------------------------------------*/ 01105 /* Directory handling - Set directory index */ 01106 /*-----------------------------------------------------------------------*/ 01107 01108 static 01109 FRESULT dir_sdi ( 01110 DIR* dp, /* Pointer to directory object */ 01111 WORD idx /* Index of directory table */ 01112 ) 01113 { 01114 DWORD clst; 01115 WORD ic; 01116 01117 01118 dp->index = idx; 01119 clst = dp->sclust; 01120 if (clst == 1 || clst >= dp->fs->n_fatent) /* Check start cluster range */ 01121 return FR_INT_ERR; 01122 if (!clst && dp->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */ 01123 clst = dp->fs->dirbase; 01124 01125 if (clst == 0) { /* Static table (root-directory in FAT12/16) */ 01126 dp->clust = clst; 01127 if (idx >= dp->fs->n_rootdir) /* Index is out of range */ 01128 return FR_INT_ERR; 01129 dp->sect = dp->fs->dirbase + idx / (SS(dp->fs) / SZ_DIR); /* Sector# */ 01130 } 01131 else { /* Dynamic table (sub-dirs or root-directory in FAT32) */ 01132 ic = SS(dp->fs) / SZ_DIR * dp->fs->csize; /* Entries per cluster */ 01133 while (idx >= ic) { /* Follow cluster chain */ 01134 clst = get_fat(dp->fs, clst); /* Get next cluster */ 01135 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 01136 if (clst < 2 || clst >= dp->fs->n_fatent) /* Reached to end of table or int error */ 01137 return FR_INT_ERR; 01138 idx -= ic; 01139 } 01140 dp->clust = clst; 01141 dp->sect = clust2sect(dp->fs, clst) + idx / (SS(dp->fs) / SZ_DIR); /* Sector# */ 01142 } 01143 01144 dp->dir = dp->fs->win.d8 + (idx % (SS(dp->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */ 01145 01146 return FR_OK; /* Seek succeeded */ 01147 } 01148 01149 01150 01151 01152 /*-----------------------------------------------------------------------*/ 01153 /* Directory handling - Move directory table index next */ 01154 /*-----------------------------------------------------------------------*/ 01155 01156 static 01157 FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */ 01158 DIR* dp, /* Pointer to the directory object */ 01159 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ 01160 ) 01161 { 01162 DWORD clst; 01163 WORD i; 01164 01165 01166 i = dp->index + 1; 01167 if (!i || !dp->sect) /* Report EOT when index has reached 65535 */ 01168 return FR_NO_FILE; 01169 01170 if (!(i % (SS(dp->fs) / SZ_DIR))) { /* Sector changed? */ 01171 dp->sect++; /* Next sector */ 01172 01173 if (!dp->clust) { /* Static table */ 01174 if (i >= dp->fs->n_rootdir) /* Report EOT if it reached end of static table */ 01175 return FR_NO_FILE; 01176 } 01177 else { /* Dynamic table */ 01178 if (((i / (SS(dp->fs) / SZ_DIR)) & (dp->fs->csize - 1)) == 0) { /* Cluster changed? */ 01179 clst = get_fat(dp->fs, dp->clust); /* Get next cluster */ 01180 if (clst <= 1) return FR_INT_ERR; 01181 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 01182 if (clst >= dp->fs->n_fatent) { /* If it reached end of dynamic table, */ 01183 #if !_FS_READONLY 01184 BYTE c; 01185 if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT */ 01186 clst = create_chain(dp->fs, dp->clust); /* Stretch cluster chain */ 01187 if (clst == 0) return FR_DENIED; /* No free cluster */ 01188 if (clst == 1) return FR_INT_ERR; 01189 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; 01190 /* Clean-up stretched table */ 01191 if (sync_window(dp->fs)) return FR_DISK_ERR;/* Flush disk access window */ 01192 mem_set(dp->fs->win.d8, 0, SS(dp->fs)); /* Clear window buffer */ 01193 dp->fs->winsect = clust2sect(dp->fs, clst); /* Cluster start sector */ 01194 for (c = 0; c < dp->fs->csize; c++) { /* Fill the new cluster with 0 */ 01195 dp->fs->wflag = 1; 01196 if (sync_window(dp->fs)) return FR_DISK_ERR; 01197 dp->fs->winsect++; 01198 } 01199 dp->fs->winsect -= c; /* Rewind window offset */ 01200 #else 01201 if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT */ 01202 return FR_NO_FILE; /* Report EOT */ 01203 #endif 01204 } 01205 dp->clust = clst; /* Initialize data for new cluster */ 01206 dp->sect = clust2sect(dp->fs, clst); 01207 } 01208 } 01209 } 01210 01211 dp->index = i; /* Current index */ 01212 dp->dir = dp->fs->win.d8 + (i % (SS(dp->fs) / SZ_DIR)) * SZ_DIR; /* Current entry in the window */ 01213 01214 return FR_OK; 01215 } 01216 01217 01218 01219 01220 /*-----------------------------------------------------------------------*/ 01221 /* Directory handling - Reserve directory entry */ 01222 /*-----------------------------------------------------------------------*/ 01223 01224 #if !_FS_READONLY 01225 static 01226 FRESULT dir_alloc ( 01227 DIR* dp, /* Pointer to the directory object */ 01228 UINT nent /* Number of contiguous entries to allocate (1-21) */ 01229 ) 01230 { 01231 FRESULT res; 01232 UINT n; 01233 01234 01235 res = dir_sdi(dp, 0); 01236 if (res == FR_OK) { 01237 n = 0; 01238 do { 01239 res = move_window(dp->fs, dp->sect); 01240 if (res != FR_OK) break; 01241 if (dp->dir[0] == DDE || dp->dir[0] == 0) { /* Is it a blank entry? */ 01242 if (++n == nent) break; /* A block of contiguous entries is found */ 01243 } else { 01244 n = 0; /* Not a blank entry. Restart to search */ 01245 } 01246 res = dir_next(dp, 1); /* Next entry with table stretch enabled */ 01247 } while (res == FR_OK); 01248 } 01249 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */ 01250 return res; 01251 } 01252 #endif 01253 01254 01255 01256 01257 /*-----------------------------------------------------------------------*/ 01258 /* Directory handling - Load/Store start cluster number */ 01259 /*-----------------------------------------------------------------------*/ 01260 01261 static 01262 DWORD ld_clust ( 01263 FATFS* fs, /* Pointer to the fs object */ 01264 BYTE* dir /* Pointer to the directory entry */ 01265 ) 01266 { 01267 DWORD cl; 01268 01269 cl = LD_WORD(dir+DIR_FstClusLO); 01270 if (fs->fs_type == FS_FAT32) 01271 cl |= (DWORD)LD_WORD(dir+DIR_FstClusHI) << 16; 01272 01273 return cl; 01274 } 01275 01276 01277 #if !_FS_READONLY 01278 static 01279 void st_clust ( 01280 BYTE* dir, /* Pointer to the directory entry */ 01281 DWORD cl /* Value to be set */ 01282 ) 01283 { 01284 ST_WORD(dir+DIR_FstClusLO, cl); 01285 ST_WORD(dir+DIR_FstClusHI, cl >> 16); 01286 } 01287 #endif 01288 01289 01290 01291 01292 /*-----------------------------------------------------------------------*/ 01293 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */ 01294 /*-----------------------------------------------------------------------*/ 01295 #if _USE_LFN 01296 static 01297 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN characters in the directory entry */ 01298 01299 01300 static 01301 int cmp_lfn ( /* 1:Matched, 0:Not matched */ 01302 WCHAR* lfnbuf, /* Pointer to the LFN to be compared */ 01303 BYTE* dir /* Pointer to the directory entry containing a part of LFN */ 01304 ) 01305 { 01306 UINT i, s; 01307 WCHAR wc, uc; 01308 01309 01310 i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13; /* Get offset in the LFN buffer */ 01311 s = 0; wc = 1; 01312 do { 01313 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ 01314 if (wc) { /* Last character has not been processed */ 01315 wc = ff_wtoupper(uc); /* Convert it to upper case */ 01316 if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */ 01317 return 0; /* Not matched */ 01318 } else { 01319 if (uc != 0xFFFF) return 0; /* Check filler */ 01320 } 01321 } while (++s < 13); /* Repeat until all characters in the entry are checked */ 01322 01323 if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i]) /* Last segment matched but different length */ 01324 return 0; 01325 01326 return 1; /* The part of LFN matched */ 01327 } 01328 01329 01330 01331 static 01332 int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */ 01333 WCHAR* lfnbuf, /* Pointer to the Unicode-LFN buffer */ 01334 BYTE* dir /* Pointer to the directory entry */ 01335 ) 01336 { 01337 UINT i, s; 01338 WCHAR wc, uc; 01339 01340 01341 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 01342 01343 s = 0; wc = 1; 01344 do { 01345 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */ 01346 if (wc) { /* Last character has not been processed */ 01347 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 01348 lfnbuf[i++] = wc = uc; /* Store it */ 01349 } else { 01350 if (uc != 0xFFFF) return 0; /* Check filler */ 01351 } 01352 } while (++s < 13); /* Read all character in the entry */ 01353 01354 if (dir[LDIR_Ord] & LLE) { /* Put terminator if it is the last LFN part */ 01355 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */ 01356 lfnbuf[i] = 0; 01357 } 01358 01359 return 1; 01360 } 01361 01362 01363 #if !_FS_READONLY 01364 static 01365 void fit_lfn ( 01366 const WCHAR* lfnbuf, /* Pointer to the LFN buffer */ 01367 BYTE* dir, /* Pointer to the directory entry */ 01368 BYTE ord, /* LFN order (1-20) */ 01369 BYTE sum /* SFN sum */ 01370 ) 01371 { 01372 UINT i, s; 01373 WCHAR wc; 01374 01375 01376 dir[LDIR_Chksum] = sum; /* Set check sum */ 01377 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ 01378 dir[LDIR_Type] = 0; 01379 ST_WORD(dir+LDIR_FstClusLO, 0); 01380 01381 i = (ord - 1) * 13; /* Get offset in the LFN buffer */ 01382 s = wc = 0; 01383 do { 01384 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective character */ 01385 ST_WORD(dir+LfnOfs[s], wc); /* Put it */ 01386 if (!wc) wc = 0xFFFF; /* Padding characters following last character */ 01387 } while (++s < 13); 01388 if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE; /* Bottom LFN part is the start of LFN sequence */ 01389 dir[LDIR_Ord] = ord; /* Set the LFN order */ 01390 } 01391 01392 #endif 01393 #endif 01394 01395 01396 01397 01398 /*-----------------------------------------------------------------------*/ 01399 /* Create numbered name */ 01400 /*-----------------------------------------------------------------------*/ 01401 #if _USE_LFN 01402 void gen_numname ( 01403 BYTE* dst, /* Pointer to generated SFN */ 01404 const BYTE* src, /* Pointer to source SFN to be modified */ 01405 const WCHAR* lfn, /* Pointer to LFN */ 01406 WORD seq /* Sequence number */ 01407 ) 01408 { 01409 BYTE ns[8], c; 01410 UINT i, j; 01411 01412 01413 mem_cpy(dst, src, 11); 01414 01415 if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */ 01416 do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; while (*lfn); 01417 } 01418 01419 /* itoa (hexdecimal) */ 01420 i = 7; 01421 do { 01422 c = (seq % 16) + '0'; 01423 if (c > '9') c += 7; 01424 ns[i--] = c; 01425 seq /= 16; 01426 } while (seq); 01427 ns[i] = '~'; 01428 01429 /* Append the number */ 01430 for (j = 0; j < i && dst[j] != ' '; j++) { 01431 if (IsDBCS1(dst[j])) { 01432 if (j == i - 1) break; 01433 j++; 01434 } 01435 } 01436 do { 01437 dst[j++] = (i < 8) ? ns[i++] : ' '; 01438 } while (j < 8); 01439 } 01440 #endif 01441 01442 01443 01444 01445 /*-----------------------------------------------------------------------*/ 01446 /* Calculate sum of an SFN */ 01447 /*-----------------------------------------------------------------------*/ 01448 #if _USE_LFN 01449 static 01450 BYTE sum_sfn ( 01451 const BYTE* dir /* Pointer to the SFN entry */ 01452 ) 01453 { 01454 BYTE sum = 0; 01455 UINT n = 11; 01456 01457 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n); 01458 return sum; 01459 } 01460 #endif 01461 01462 01463 01464 01465 /*-----------------------------------------------------------------------*/ 01466 /* Directory handling - Find an object in the directory */ 01467 /*-----------------------------------------------------------------------*/ 01468 01469 static 01470 FRESULT dir_find ( 01471 DIR* dp /* Pointer to the directory object linked to the file name */ 01472 ) 01473 { 01474 FRESULT res; 01475 BYTE c, *dir; 01476 #if _USE_LFN 01477 BYTE a, ord, sum; 01478 #endif 01479 01480 res = dir_sdi(dp, 0); /* Rewind directory object */ 01481 if (res != FR_OK) return res; 01482 01483 #if _USE_LFN 01484 ord = sum = 0xFF; 01485 #endif 01486 do { 01487 res = move_window(dp->fs, dp->sect); 01488 if (res != FR_OK) break; 01489 dir = dp->dir; /* Ptr to the directory entry of current index */ 01490 c = dir[DIR_Name]; 01491 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 01492 #if _USE_LFN /* LFN configuration */ 01493 a = dir[DIR_Attr] & AM_MASK; 01494 if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 01495 ord = 0xFF; 01496 } else { 01497 if (a == AM_LFN) { /* An LFN entry is found */ 01498 if (dp->lfn) { 01499 if (c & LLE) { /* Is it start of LFN sequence? */ 01500 sum = dir[LDIR_Chksum]; 01501 c &= ~LLE; ord = c; /* LFN start order */ 01502 dp->lfn_idx = dp->index; 01503 } 01504 /* Check validity of the LFN entry and compare it with given name */ 01505 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF; 01506 } 01507 } else { /* An SFN entry is found */ 01508 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */ 01509 ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */ 01510 if (!(dp->fn[NS] & NS_LOSS) && !mem_cmp(dir, dp->fn, 11)) break; /* SFN matched? */ 01511 } 01512 } 01513 #else /* Non LFN configuration */ 01514 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dp->fn, 11)) /* Is it a valid entry? */ 01515 break; 01516 #endif 01517 res = dir_next(dp, 0); /* Next entry */ 01518 } while (res == FR_OK); 01519 01520 return res; 01521 } 01522 01523 01524 01525 01526 /*-----------------------------------------------------------------------*/ 01527 /* Read an object from the directory */ 01528 /*-----------------------------------------------------------------------*/ 01529 #if _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 01530 static 01531 FRESULT dir_read ( 01532 DIR* dp, /* Pointer to the directory object */ 01533 int vol /* Filtered by 0:file/directory or 1:volume label */ 01534 ) 01535 { 01536 FRESULT res; 01537 BYTE a, c, *dir; 01538 #if _USE_LFN 01539 BYTE ord = 0xFF, sum = 0xFF; 01540 #endif 01541 01542 res = FR_NO_FILE; 01543 while (dp->sect) { 01544 res = move_window(dp->fs, dp->sect); 01545 if (res != FR_OK) break; 01546 dir = dp->dir; /* Ptr to the directory entry of current index */ 01547 c = dir[DIR_Name]; 01548 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 01549 a = dir[DIR_Attr] & AM_MASK; 01550 #if _USE_LFN /* LFN configuration */ 01551 if (c == DDE || (!_FS_RPATH && c == '.') || (int)(a == AM_VOL) != vol) { /* An entry without valid data */ 01552 ord = 0xFF; 01553 } else { 01554 if (a == AM_LFN) { /* An LFN entry is found */ 01555 if (c & LLE) { /* Is it start of LFN sequence? */ 01556 sum = dir[LDIR_Chksum]; 01557 c &= ~LLE; ord = c; 01558 dp->lfn_idx = dp->index; 01559 } 01560 /* Check LFN validity and capture it */ 01561 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF; 01562 } else { /* An SFN entry is found */ 01563 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */ 01564 dp->lfn_idx = 0xFFFF; /* It has no LFN. */ 01565 break; 01566 } 01567 } 01568 #else /* Non LFN configuration */ 01569 if (c != DDE && (_FS_RPATH || c != '.') && a != AM_LFN && (int)(a == AM_VOL) == vol) /* Is it a valid entry? */ 01570 break; 01571 #endif 01572 res = dir_next(dp, 0); /* Next entry */ 01573 if (res != FR_OK) break; 01574 } 01575 01576 if (res != FR_OK) dp->sect = 0; 01577 01578 return res; 01579 } 01580 #endif /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */ 01581 01582 01583 01584 01585 /*-----------------------------------------------------------------------*/ 01586 /* Register an object to the directory */ 01587 /*-----------------------------------------------------------------------*/ 01588 #if !_FS_READONLY 01589 static 01590 FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */ 01591 DIR* dp /* Target directory with object name to be created */ 01592 ) 01593 { 01594 FRESULT res; 01595 #if _USE_LFN /* LFN configuration */ 01596 WORD n, ne; 01597 BYTE sn[12], *fn, sum; 01598 WCHAR *lfn; 01599 01600 01601 fn = dp->fn; lfn = dp->lfn; 01602 mem_cpy(sn, fn, 12); 01603 01604 if (_FS_RPATH && (sn[NS] & NS_DOT)) /* Cannot create dot entry */ 01605 return FR_INVALID_NAME; 01606 01607 if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ 01608 fn[NS] = 0; dp->lfn = 0; /* Find only SFN */ 01609 for (n = 1; n < 100; n++) { 01610 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */ 01611 res = dir_find(dp); /* Check if the name collides with existing SFN */ 01612 if (res != FR_OK) break; 01613 } 01614 if (n == 100) return FR_DENIED; /* Abort if too many collisions */ 01615 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ 01616 fn[NS] = sn[NS]; dp->lfn = lfn; 01617 } 01618 01619 if (sn[NS] & NS_LFN) { /* When LFN is to be created, allocate entries for an SFN + LFNs. */ 01620 for (n = 0; lfn[n]; n++) ; 01621 ne = (n + 25) / 13; 01622 } else { /* Otherwise allocate an entry for an SFN */ 01623 ne = 1; 01624 } 01625 res = dir_alloc(dp, ne); /* Allocate entries */ 01626 01627 if (res == FR_OK && --ne) { /* Set LFN entry if needed */ 01628 res = dir_sdi(dp, (WORD)(dp->index - ne)); 01629 if (res == FR_OK) { 01630 sum = sum_sfn(dp->fn); /* Sum value of the SFN tied to the LFN */ 01631 do { /* Store LFN entries in bottom first */ 01632 res = move_window(dp->fs, dp->sect); 01633 if (res != FR_OK) break; 01634 fit_lfn(dp->lfn, dp->dir, (BYTE)ne, sum); 01635 dp->fs->wflag = 1; 01636 res = dir_next(dp, 0); /* Next entry */ 01637 } while (res == FR_OK && --ne); 01638 } 01639 } 01640 #else /* Non LFN configuration */ 01641 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */ 01642 #endif 01643 01644 if (res == FR_OK) { /* Set SFN entry */ 01645 res = move_window(dp->fs, dp->sect); 01646 if (res == FR_OK) { 01647 mem_set(dp->dir, 0, SZ_DIR); /* Clean the entry */ 01648 mem_cpy(dp->dir, dp->fn, 11); /* Put SFN */ 01649 #if _USE_LFN 01650 dp->dir[DIR_NTres] = dp->fn[NS] & (NS_BODY | NS_EXT); /* Put NT flag */ 01651 #endif 01652 dp->fs->wflag = 1; 01653 } 01654 } 01655 01656 return res; 01657 } 01658 #endif /* !_FS_READONLY */ 01659 01660 01661 01662 01663 /*-----------------------------------------------------------------------*/ 01664 /* Remove an object from the directory */ 01665 /*-----------------------------------------------------------------------*/ 01666 #if !_FS_READONLY && !_FS_MINIMIZE 01667 static 01668 FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */ 01669 DIR* dp /* Directory object pointing the entry to be removed */ 01670 ) 01671 { 01672 FRESULT res; 01673 #if _USE_LFN /* LFN configuration */ 01674 WORD i; 01675 01676 i = dp->index; /* SFN index */ 01677 res = dir_sdi(dp, (WORD)((dp->lfn_idx == 0xFFFF) ? i : dp->lfn_idx)); /* Goto the SFN or top of the LFN entries */ 01678 if (res == FR_OK) { 01679 do { 01680 res = move_window(dp->fs, dp->sect); 01681 if (res != FR_OK) break; 01682 *dp->dir = DDE; /* Mark the entry "deleted" */ 01683 dp->fs->wflag = 1; 01684 if (dp->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */ 01685 res = dir_next(dp, 0); /* Next entry */ 01686 } while (res == FR_OK); 01687 if (res == FR_NO_FILE) res = FR_INT_ERR; 01688 } 01689 01690 #else /* Non LFN configuration */ 01691 res = dir_sdi(dp, dp->index); 01692 if (res == FR_OK) { 01693 res = move_window(dp->fs, dp->sect); 01694 if (res == FR_OK) { 01695 *dp->dir = DDE; /* Mark the entry "deleted" */ 01696 dp->fs->wflag = 1; 01697 } 01698 } 01699 #endif 01700 01701 return res; 01702 } 01703 #endif /* !_FS_READONLY */ 01704 01705 01706 01707 01708 /*-----------------------------------------------------------------------*/ 01709 /* Pick a segment and create the object name in directory form */ 01710 /*-----------------------------------------------------------------------*/ 01711 01712 static 01713 FRESULT create_name ( 01714 DIR* dp, /* Pointer to the directory object */ 01715 const TCHAR** path /* Pointer to pointer to the segment in the path string */ 01716 ) 01717 { 01718 #if _USE_LFN /* LFN configuration */ 01719 BYTE b, cf; 01720 WCHAR w, *lfn; 01721 UINT i, ni, si, di; 01722 const TCHAR *p; 01723 01724 /* Create LFN in Unicode */ 01725 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ 01726 lfn = dp->lfn; 01727 si = di = 0; 01728 for (;;) { 01729 w = p[si++]; /* Get a character */ 01730 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */ 01731 if (di >= _MAX_LFN) /* Reject too long name */ 01732 return FR_INVALID_NAME; 01733 #if !_LFN_UNICODE 01734 w &= 0xFF; 01735 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ 01736 01737 #if _DF1S 01738 b = (BYTE)p[si++]; /* Get 2nd byte */ 01739 if (!IsDBCS2(b)) 01740 return FR_INVALID_NAME; /* Reject invalid sequence */ 01741 w = (w << 8) + b; /* Create a DBC */ 01742 #endif 01743 } 01744 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */ 01745 if (!w) return FR_INVALID_NAME; /* Reject invalid code */ 01746 #endif 01747 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal characters for LFN */ 01748 return FR_INVALID_NAME; 01749 lfn[di++] = w; /* Store the Unicode character */ 01750 } 01751 *path = &p[si]; /* Return pointer to the next segment */ 01752 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 01753 #if _FS_RPATH 01754 if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */ 01755 (di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) { 01756 lfn[di] = 0; 01757 for (i = 0; i < 11; i++) 01758 dp->fn[i] = (i < di) ? '.' : ' '; 01759 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */ 01760 return FR_OK; 01761 } 01762 #endif 01763 while (di) { /* Strip trailing spaces and dots */ 01764 w = lfn[di-1]; 01765 if (w != ' ' && w != '.') break; 01766 di--; 01767 } 01768 if (!di) return FR_INVALID_NAME; /* Reject nul string */ 01769 01770 lfn[di] = 0; /* LFN is created */ 01771 01772 /* Create SFN in directory form */ 01773 mem_set(dp->fn, ' ', 11); 01774 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */ 01775 if (si) cf |= NS_LOSS | NS_LFN; 01776 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */ 01777 01778 b = i = 0; ni = 8; 01779 for (;;) { 01780 w = lfn[si++]; /* Get an LFN character */ 01781 if (!w) break; /* Break on end of the LFN */ 01782 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */ 01783 cf |= NS_LOSS | NS_LFN; continue; 01784 } 01785 01786 if (i >= ni || si == di) { /* Extension or end of SFN */ 01787 if (ni == 11) { /* Long extension */ 01788 cf |= NS_LOSS | NS_LFN; break; 01789 } 01790 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */ 01791 if (si > di) break; /* No extension */ 01792 si = di; i = 8; ni = 11; /* Enter extension section */ 01793 b <<= 2; continue; 01794 } 01795 01796 if (w >= 0x80) { /* Non ASCII character */ 01797 #ifdef _EXCVT 01798 w = ff_convert(w, 0); /* Unicode -> OEM code */ 01799 if (w) w = ExCvt[w - 0x80]; /* Convert extended character to upper (SBCS) */ 01800 #else 01801 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */ 01802 #endif 01803 cf |= NS_LFN; /* Force create LFN entry */ 01804 } 01805 01806 if (_DF1S && w >= 0x100) { /* Double byte character (always false on SBCS cfg) */ 01807 if (i >= ni - 1) { 01808 cf |= NS_LOSS | NS_LFN; i = ni; continue; 01809 } 01810 dp->fn[i++] = (BYTE)(w >> 8); 01811 } else { /* Single byte character */ 01812 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */ 01813 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ 01814 } else { 01815 if (IsUpper(w)) { /* ASCII large capital */ 01816 b |= 2; 01817 } else { 01818 if (IsLower(w)) { /* ASCII small capital */ 01819 b |= 1; w -= 0x20; 01820 } 01821 } 01822 } 01823 } 01824 dp->fn[i++] = (BYTE)w; 01825 } 01826 01827 if (dp->fn[0] == DDE) dp->fn[0] = NDDE; /* If the first character collides with deleted mark, replace it with 0x05 */ 01828 01829 if (ni == 8) b <<= 2; 01830 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */ 01831 cf |= NS_LFN; 01832 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */ 01833 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */ 01834 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */ 01835 } 01836 01837 dp->fn[NS] = cf; /* SFN is created */ 01838 01839 return FR_OK; 01840 01841 01842 #else /* Non-LFN configuration */ 01843 BYTE b, c, d, *sfn; 01844 UINT ni, si, i; 01845 const char *p; 01846 01847 /* Create file name in directory form */ 01848 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */ 01849 sfn = dp->fn; 01850 mem_set(sfn, ' ', 11); 01851 si = i = b = 0; ni = 8; 01852 #if _FS_RPATH 01853 if (p[si] == '.') { /* Is this a dot entry? */ 01854 for (;;) { 01855 c = (BYTE)p[si++]; 01856 if (c != '.' || si >= 3) break; 01857 sfn[i++] = c; 01858 } 01859 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; 01860 *path = &p[si]; /* Return pointer to the next segment */ 01861 sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */ 01862 return FR_OK; 01863 } 01864 #endif 01865 for (;;) { 01866 c = (BYTE)p[si++]; 01867 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */ 01868 if (c == '.' || i >= ni) { 01869 if (ni != 8 || c != '.') return FR_INVALID_NAME; 01870 i = 8; ni = 11; 01871 b <<= 2; continue; 01872 } 01873 if (c >= 0x80) { /* Extended character? */ 01874 b |= 3; /* Eliminate NT flag */ 01875 #ifdef _EXCVT 01876 c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */ 01877 #else 01878 #if !_DF1S 01879 return FR_INVALID_NAME; /* Reject extended characters (ASCII cfg) */ 01880 #endif 01881 #endif 01882 } 01883 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */ 01884 d = (BYTE)p[si++]; /* Get 2nd byte */ 01885 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */ 01886 return FR_INVALID_NAME; 01887 sfn[i++] = c; 01888 sfn[i++] = d; 01889 } else { /* Single byte code */ 01890 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */ 01891 return FR_INVALID_NAME; 01892 if (IsUpper(c)) { /* ASCII large capital? */ 01893 b |= 2; 01894 } else { 01895 if (IsLower(c)) { /* ASCII small capital? */ 01896 b |= 1; c -= 0x20; 01897 } 01898 } 01899 sfn[i++] = c; 01900 } 01901 } 01902 *path = &p[si]; /* Return pointer to the next segment */ 01903 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */ 01904 01905 if (!i) return FR_INVALID_NAME; /* Reject nul string */ 01906 if (sfn[0] == DDE) sfn[0] = NDDE; /* When first character collides with DDE, replace it with 0x05 */ 01907 01908 if (ni == 8) b <<= 2; 01909 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */ 01910 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */ 01911 01912 sfn[NS] = c; /* Store NT flag, File name is created */ 01913 01914 return FR_OK; 01915 #endif 01916 } 01917 01918 01919 01920 01921 /*-----------------------------------------------------------------------*/ 01922 /* Get file information from directory entry */ 01923 /*-----------------------------------------------------------------------*/ 01924 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 01925 static 01926 void get_fileinfo ( /* No return code */ 01927 DIR* dp, /* Pointer to the directory object */ 01928 FILINFO* fno /* Pointer to the file information to be filled */ 01929 ) 01930 { 01931 UINT i; 01932 TCHAR *p, c; 01933 01934 01935 p = fno->fname; 01936 if (dp->sect) { /* Get SFN */ 01937 BYTE *dir = dp->dir; 01938 01939 i = 0; 01940 while (i < 11) { /* Copy name body and extension */ 01941 c = (TCHAR)dir[i++]; 01942 if (c == ' ') continue; /* Skip padding spaces */ 01943 if (c == NDDE) c = (TCHAR)DDE; /* Restore replaced DDE character */ 01944 if (i == 9) *p++ = '.'; /* Insert a . if extension is exist */ 01945 #if _USE_LFN 01946 if (IsUpper(c) && (dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY))) 01947 c += 0x20; /* To lower */ 01948 #if _LFN_UNICODE 01949 if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dir[i])) 01950 c = c << 8 | dir[i++]; 01951 c = ff_convert(c, 1); /* OEM -> Unicode */ 01952 if (!c) c = '?'; 01953 #endif 01954 #endif 01955 *p++ = c; 01956 } 01957 fno->fattrib = dir[DIR_Attr]; /* Attribute */ 01958 fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */ 01959 fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */ 01960 fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */ 01961 } 01962 *p = 0; /* Terminate SFN string by a \0 */ 01963 01964 #if _USE_LFN 01965 if (fno->lfname) { 01966 WCHAR w, *lfn; 01967 01968 i = 0; p = fno->lfname; 01969 if (dp->sect && fno->lfsize && dp->lfn_idx != 0xFFFF) { /* Get LFN if available */ 01970 lfn = dp->lfn; 01971 while ((w = *lfn++) != 0) { /* Get an LFN character */ 01972 #if !_LFN_UNICODE 01973 w = ff_convert(w, 0); /* Unicode -> OEM */ 01974 if (!w) { i = 0; break; } /* No LFN if it could not be converted */ 01975 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */ 01976 p[i++] = (TCHAR)(w >> 8); 01977 #endif 01978 if (i >= fno->lfsize - 1) { i = 0; break; } /* No LFN if buffer overflow */ 01979 p[i++] = (TCHAR)w; 01980 } 01981 } 01982 p[i] = 0; /* Terminate LFN string by a \0 */ 01983 } 01984 #endif 01985 } 01986 #endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2*/ 01987 01988 01989 01990 01991 /*-----------------------------------------------------------------------*/ 01992 /* Get logical drive number from path name */ 01993 /*-----------------------------------------------------------------------*/ 01994 01995 static 01996 int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */ 01997 const TCHAR** path /* Pointer to pointer to the path name */ 01998 ) 01999 { 02000 int vol = -1; 02001 02002 02003 if (*path) { 02004 vol = (*path)[0] - '0'; 02005 if ((UINT)vol < 9 && (*path)[1] == ':') { /* There is a drive number */ 02006 *path += 2; /* Get value and strip it */ 02007 if (vol >= _VOLUMES) vol = -1; /* Check if the drive number is valid */ 02008 } else { /* No drive number use default drive */ 02009 #if _FS_RPATH && _VOLUMES >= 2 02010 vol = CurrVol; /* Current drive */ 02011 #else 02012 vol = 0; /* Drive 0 */ 02013 #endif 02014 } 02015 } 02016 02017 return vol; 02018 } 02019 02020 02021 02022 02023 /*-----------------------------------------------------------------------*/ 02024 /* Follow a file path */ 02025 /*-----------------------------------------------------------------------*/ 02026 02027 static 02028 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ 02029 DIR* dp, /* Directory object to return last directory and found object */ 02030 const TCHAR* path /* Full-path string to find a file or directory */ 02031 ) 02032 { 02033 FRESULT res; 02034 BYTE *dir, ns; 02035 02036 02037 #if _FS_RPATH 02038 if (*path == '/' || *path == '\\') { /* There is a heading separator */ 02039 path++; dp->sclust = 0; /* Strip it and start from the root directory */ 02040 } else { /* No heading separator */ 02041 dp->sclust = dp->fs->cdir; /* Start from the current directory */ 02042 } 02043 #else 02044 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */ 02045 path++; 02046 dp->sclust = 0; /* Always start from the root directory */ 02047 #endif 02048 02049 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */ 02050 res = dir_sdi(dp, 0); 02051 dp->dir = 0; 02052 } else { /* Follow path */ 02053 for (;;) { 02054 res = create_name(dp, &path); /* Get a segment name of the path */ 02055 if (res != FR_OK) break; 02056 res = dir_find(dp); /* Find an object with the sagment name */ 02057 ns = dp->fn[NS]; 02058 if (res != FR_OK) { /* Failed to find the object */ 02059 if (res == FR_NO_FILE) { /* Object is not found */ 02060 if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, */ 02061 dp->sclust = 0; dp->dir = 0; /* it is the root directory and stay there */ 02062 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */ 02063 res = FR_OK; /* Ended at the root directroy. Function completed. */ 02064 } else { /* Could not find the object */ 02065 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */ 02066 } 02067 } 02068 break; 02069 } 02070 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */ 02071 dir = dp->dir; /* Follow the sub-directory */ 02072 if (!(dir[DIR_Attr] & AM_DIR)) { /* It is not a sub-directory and cannot follow */ 02073 res = FR_NO_PATH; break; 02074 } 02075 dp->sclust = ld_clust(dp->fs, dir); 02076 } 02077 } 02078 02079 return res; 02080 } 02081 02082 02083 02084 02085 /*-----------------------------------------------------------------------*/ 02086 /* Load a sector and check if it is an FAT boot sector */ 02087 /*-----------------------------------------------------------------------*/ 02088 02089 static 02090 BYTE check_fs ( /* 0:FAT boor sector, 1:Valid boor sector but not FAT, 2:Not a boot sector, 3:Disk error */ 02091 FATFS* fs, /* File system object */ 02092 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ 02093 ) 02094 { 02095 fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */ 02096 if (move_window(fs, sect) != FR_OK) /* Load boot record */ 02097 return 3; 02098 02099 if (LD_WORD(&fs->win.d8[BS_55AA]) != 0xAA55) /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */ 02100 return 2; 02101 02102 if ((LD_DWORD(&fs->win.d8[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ 02103 return 0; 02104 if ((LD_DWORD(&fs->win.d8[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */ 02105 return 0; 02106 02107 return 1; 02108 } 02109 02110 02111 02112 02113 /*-----------------------------------------------------------------------*/ 02114 /* Find logical drive and check if the volume is mounted */ 02115 /*-----------------------------------------------------------------------*/ 02116 02117 static 02118 FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */ 02119 FATFS** rfs, /* Pointer to pointer to the found file system object */ 02120 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */ 02121 BYTE wmode /* !=0: Check write protection for write access */ 02122 ) 02123 { 02124 BYTE fmt; 02125 int vol; 02126 DSTATUS stat; 02127 DWORD bsect, fasize, tsect, sysect, nclst, szbfat; 02128 WORD nrsv; 02129 FATFS *fs; 02130 02131 02132 /* Get logical drive number from the path name */ 02133 *rfs = 0; 02134 vol = get_ldnumber(path); 02135 if (vol < 0) return FR_INVALID_DRIVE; 02136 02137 /* Check if the file system object is valid or not */ 02138 fs = FatFs[vol]; /* Get pointer to the file system object */ 02139 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */ 02140 02141 ENTER_FF(fs); /* Lock the volume */ 02142 *rfs = fs; /* Return pointer to the file system object */ 02143 02144 if (fs->fs_type) { /* If the volume has been mounted */ 02145 stat = disk_status(fs->drv); 02146 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */ 02147 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */ 02148 return FR_WRITE_PROTECTED; 02149 return FR_OK; /* The file system object is valid */ 02150 } 02151 } 02152 02153 /* The file system object is not valid. */ 02154 /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */ 02155 02156 fs->fs_type = 0; /* Clear the file system object */ 02157 fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */ 02158 stat = disk_initialize(fs->drv); /* Initialize the physical drive */ 02159 if (stat & STA_NOINIT) /* Check if the initialization succeeded */ 02160 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */ 02161 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */ 02162 return FR_WRITE_PROTECTED; 02163 #if _MAX_SS != 512 /* Get sector size (variable sector size cfg only) */ 02164 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK) 02165 return FR_DISK_ERR; 02166 #endif 02167 /* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */ 02168 bsect = 0; 02169 fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT boot sector as SFD */ 02170 if (fmt == 1 || (!fmt && (LD2PT(vol)))) { /* Not an FAT boot sector or forced partition number */ 02171 UINT i; 02172 DWORD br[4]; 02173 02174 for (i = 0; i < 4; i++) { /* Get partition offset */ 02175 BYTE *pt = fs->win.d8+MBR_Table + i * SZ_PTE; 02176 br[i] = pt[4] ? LD_DWORD(&pt[8]) : 0; 02177 } 02178 i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */ 02179 if (i) i--; 02180 do { /* Find an FAT volume */ 02181 bsect = br[i]; 02182 fmt = bsect ? check_fs(fs, bsect) : 2; /* Check the partition */ 02183 } while (!LD2PT(vol) && fmt && ++i < 4); 02184 } 02185 if (fmt == 3) return FR_DISK_ERR; /* An error occured in the disk I/O layer */ 02186 if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */ 02187 02188 /* An FAT volume is found. Following code initializes the file system object */ 02189 02190 if (LD_WORD(fs->win.d8+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */ 02191 return FR_NO_FILESYSTEM; 02192 02193 fasize = LD_WORD(fs->win.d8+BPB_FATSz16); /* Number of sectors per FAT */ 02194 if (!fasize) fasize = LD_DWORD(fs->win.d8+BPB_FATSz32); 02195 fs->fsize = fasize; 02196 02197 fs->n_fats = fs->win.d8[BPB_NumFATs]; /* Number of FAT copies */ 02198 if (fs->n_fats != 1 && fs->n_fats != 2) /* (Must be 1 or 2) */ 02199 return FR_NO_FILESYSTEM; 02200 fasize *= fs->n_fats; /* Number of sectors for FAT area */ 02201 02202 fs->csize = fs->win.d8[BPB_SecPerClus]; /* Number of sectors per cluster */ 02203 if (!fs->csize || (fs->csize & (fs->csize - 1))) /* (Must be power of 2) */ 02204 return FR_NO_FILESYSTEM; 02205 02206 fs->n_rootdir = LD_WORD(fs->win.d8+BPB_RootEntCnt); /* Number of root directory entries */ 02207 if (fs->n_rootdir % (SS(fs) / SZ_DIR)) /* (Must be sector aligned) */ 02208 return FR_NO_FILESYSTEM; 02209 02210 tsect = LD_WORD(fs->win.d8+BPB_TotSec16); /* Number of sectors on the volume */ 02211 if (!tsect) tsect = LD_DWORD(fs->win.d8+BPB_TotSec32); 02212 02213 nrsv = LD_WORD(fs->win.d8+BPB_RsvdSecCnt); /* Number of reserved sectors */ 02214 if (!nrsv) return FR_NO_FILESYSTEM; /* (Must not be 0) */ 02215 02216 /* Determine the FAT sub type */ 02217 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); /* RSV+FAT+DIR */ 02218 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 02219 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ 02220 if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 02221 fmt = FS_FAT12; 02222 if (nclst >= MIN_FAT16) fmt = FS_FAT16; 02223 if (nclst >= MIN_FAT32) fmt = FS_FAT32; 02224 02225 /* Boundaries and Limits */ 02226 fs->n_fatent = nclst + 2; /* Number of FAT entries */ 02227 fs->volbase = bsect; /* Volume start sector */ 02228 fs->fatbase = bsect + nrsv; /* FAT start sector */ 02229 fs->database = bsect + sysect; /* Data start sector */ 02230 if (fmt == FS_FAT32) { 02231 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ 02232 fs->dirbase = LD_DWORD(fs->win.d8+BPB_RootClus); /* Root directory start cluster */ 02233 szbfat = fs->n_fatent * 4; /* (Required FAT size) */ 02234 } else { 02235 if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */ 02236 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ 02237 szbfat = (fmt == FS_FAT16) ? /* (Required FAT size) */ 02238 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); 02239 } 02240 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than required) */ 02241 return FR_NO_FILESYSTEM; 02242 02243 #if !_FS_READONLY 02244 /* Initialize cluster allocation information */ 02245 fs->last_clust = fs->free_clust = 0xFFFFFFFF; 02246 02247 /* Get fsinfo if available */ 02248 fs->fsi_flag = 0x80; 02249 if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo is 1 */ 02250 && LD_WORD(fs->win.d8+BPB_FSInfo) == 1 02251 && move_window(fs, bsect + 1) == FR_OK) 02252 { 02253 fs->fsi_flag = 0; 02254 if (LD_WORD(fs->win.d8+BS_55AA) == 0xAA55 /* Load FSINFO data if available */ 02255 && LD_DWORD(fs->win.d8+FSI_LeadSig) == 0x41615252 02256 && LD_DWORD(fs->win.d8+FSI_StrucSig) == 0x61417272) 02257 { 02258 #if !_FS_NOFSINFO 02259 fs->free_clust = LD_DWORD(fs->win.d8+FSI_Free_Count); 02260 #endif 02261 fs->last_clust = LD_DWORD(fs->win.d8+FSI_Nxt_Free); 02262 } 02263 } 02264 #endif 02265 fs->fs_type = fmt; /* FAT sub-type */ 02266 fs->id = ++Fsid; /* File system mount ID */ 02267 #if _FS_RPATH 02268 fs->cdir = 0; /* Current directory (root dir) */ 02269 #endif 02270 #if _FS_LOCK /* Clear file lock semaphores */ 02271 clear_lock(fs); 02272 #endif 02273 02274 return FR_OK; 02275 } 02276 02277 02278 02279 02280 /*-----------------------------------------------------------------------*/ 02281 /* Check if the file/directory object is valid or not */ 02282 /*-----------------------------------------------------------------------*/ 02283 02284 static 02285 FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */ 02286 void* obj /* Pointer to the object FIL/DIR to check validity */ 02287 ) 02288 { 02289 FIL *fil = (FIL*)obj; /* Assuming offset of .fs and .id in the FIL/DIR structure is identical */ 02290 02291 02292 if (!fil || !fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id) 02293 return FR_INVALID_OBJECT; 02294 02295 ENTER_FF(fil->fs); /* Lock file system */ 02296 02297 if (disk_status(fil->fs->drv) & STA_NOINIT) 02298 return FR_NOT_READY; 02299 02300 return FR_OK; 02301 } 02302 02303 02304 02305 02306 /*-------------------------------------------------------------------------- 02307 02308 Public Functions 02309 02310 --------------------------------------------------------------------------*/ 02311 02312 02313 02314 /*-----------------------------------------------------------------------*/ 02315 /* Mount/Unmount a Logical Drive */ 02316 /*-----------------------------------------------------------------------*/ 02317 02318 FRESULT f_mount ( 02319 FATFS* fs, /* Pointer to the file system object (NULL:unmount)*/ 02320 const TCHAR* path, /* Logical drive number to be mounted/unmounted */ 02321 BYTE opt /* 0:Do not mount (delayed mount), 1:Mount immediately */ 02322 ) 02323 { 02324 FATFS *cfs; 02325 int vol; 02326 FRESULT res; 02327 const TCHAR *rp = path; 02328 02329 vol = get_ldnumber(&rp); 02330 if (vol < 0) return FR_INVALID_DRIVE; 02331 cfs = FatFs[vol]; /* Pointer to fs object */ 02332 02333 if (cfs) { 02334 #if _FS_LOCK 02335 clear_lock(cfs); 02336 #endif 02337 #if _FS_REENTRANT /* Discard sync object of the current volume */ 02338 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR; 02339 #endif 02340 cfs->fs_type = 0; /* Clear old fs object */ 02341 } 02342 02343 if (fs) { 02344 fs->fs_type = 0; /* Clear new fs object */ 02345 #if _FS_REENTRANT /* Create sync object for the new volume */ 02346 if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR; 02347 #endif 02348 } 02349 FatFs[vol] = fs; /* Register new fs object */ 02350 02351 if (!fs || opt != 1) return FR_OK; /* Do not mount now, it will be mounted later */ 02352 02353 res = find_volume(&fs, &path, 0); /* Force mounted the volume */ 02354 LEAVE_FF(fs, res); 02355 } 02356 02357 02358 02359 02360 /*-----------------------------------------------------------------------*/ 02361 /* Open or Create a File */ 02362 /*-----------------------------------------------------------------------*/ 02363 02364 FRESULT f_open ( 02365 FIL* fp, /* Pointer to the blank file object */ 02366 const TCHAR* path, /* Pointer to the file name */ 02367 BYTE mode /* Access mode and file open mode flags */ 02368 ) 02369 { 02370 FRESULT res; 02371 DIR dj; 02372 BYTE *dir; 02373 DEF_NAMEBUF; 02374 02375 02376 if (!fp) return FR_INVALID_OBJECT; 02377 fp->fs = 0; /* Clear file object */ 02378 02379 /* Get logical drive number */ 02380 #if !_FS_READONLY 02381 mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW; 02382 res = find_volume(&dj.fs, &path, (BYTE)(mode & ~FA_READ)); 02383 #else 02384 mode &= FA_READ; 02385 res = find_volume(&dj.fs, &path, 0); 02386 #endif 02387 if (res == FR_OK) { 02388 INIT_BUF(dj); 02389 res = follow_path(&dj, path); /* Follow the file path */ 02390 dir = dj.dir; 02391 #if !_FS_READONLY /* R/W configuration */ 02392 if (res == FR_OK) { 02393 if (!dir) /* Default directory itself */ 02394 res = FR_INVALID_NAME; 02395 #if _FS_LOCK 02396 else 02397 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 02398 #endif 02399 } 02400 /* Create or Open a file */ 02401 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { 02402 DWORD dw, cl; 02403 02404 if (res != FR_OK) { /* No file, create new */ 02405 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */ 02406 #if _FS_LOCK 02407 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; 02408 #else 02409 res = dir_register(&dj); 02410 #endif 02411 mode |= FA_CREATE_ALWAYS; /* File is created */ 02412 dir = dj.dir; /* New entry */ 02413 } 02414 else { /* Any object is already existing */ 02415 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */ 02416 res = FR_DENIED; 02417 } else { 02418 if (mode & FA_CREATE_NEW) /* Cannot create as new file */ 02419 res = FR_EXIST; 02420 } 02421 } 02422 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */ 02423 dw = get_fattime(); /* Created time */ 02424 ST_DWORD(dir+DIR_CrtTime, dw); 02425 dir[DIR_Attr] = 0; /* Reset attribute */ 02426 ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */ 02427 cl = ld_clust(dj.fs, dir); /* Get start cluster */ 02428 st_clust(dir, 0); /* cluster = 0 */ 02429 dj.fs->wflag = 1; 02430 if (cl) { /* Remove the cluster chain if exist */ 02431 dw = dj.fs->winsect; 02432 res = remove_chain(dj.fs, cl); 02433 if (res == FR_OK) { 02434 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */ 02435 res = move_window(dj.fs, dw); 02436 } 02437 } 02438 } 02439 } 02440 else { /* Open an existing file */ 02441 if (res == FR_OK) { /* Follow succeeded */ 02442 if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */ 02443 res = FR_NO_FILE; 02444 } else { 02445 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */ 02446 res = FR_DENIED; 02447 } 02448 } 02449 } 02450 if (res == FR_OK) { 02451 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */ 02452 mode |= FA__WRITTEN; 02453 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */ 02454 fp->dir_ptr = dir; 02455 #if _FS_LOCK 02456 fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); 02457 if (!fp->lockid) res = FR_INT_ERR; 02458 #endif 02459 } 02460 02461 #else /* R/O configuration */ 02462 if (res == FR_OK) { /* Follow succeeded */ 02463 dir = dj.dir; 02464 if (!dir) { /* Current directory itself */ 02465 res = FR_INVALID_NAME; 02466 } else { 02467 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */ 02468 res = FR_NO_FILE; 02469 } 02470 } 02471 #endif 02472 FREE_BUF(); 02473 02474 if (res == FR_OK) { 02475 fp->flag = mode; /* File access mode */ 02476 fp->err = 0; /* Clear error flag */ 02477 fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */ 02478 fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */ 02479 fp->fptr = 0; /* File pointer */ 02480 fp->dsect = 0; 02481 #if _USE_FASTSEEK 02482 fp->cltbl = 0; /* Normal seek mode */ 02483 #endif 02484 fp->fs = dj.fs; /* Validate file object */ 02485 fp->id = fp->fs->id; 02486 } 02487 } 02488 02489 LEAVE_FF(dj.fs, res); 02490 } 02491 02492 02493 02494 02495 /*-----------------------------------------------------------------------*/ 02496 /* Read File */ 02497 /*-----------------------------------------------------------------------*/ 02498 02499 FRESULT f_read ( 02500 FIL* fp, /* Pointer to the file object */ 02501 void* buff, /* Pointer to data buffer */ 02502 UINT btr, /* Number of bytes to read */ 02503 UINT* br /* Pointer to number of bytes read */ 02504 ) 02505 { 02506 FRESULT res; 02507 DWORD clst, sect, remain; 02508 UINT rcnt, cc; 02509 BYTE csect, *rbuff = (BYTE*)buff; 02510 02511 02512 *br = 0; /* Clear read byte counter */ 02513 02514 res = validate(fp); /* Check validity */ 02515 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02516 if (fp->err) /* Check error */ 02517 LEAVE_FF(fp->fs, (FRESULT)fp->err); 02518 if (!(fp->flag & FA_READ)) /* Check access mode */ 02519 LEAVE_FF(fp->fs, FR_DENIED); 02520 remain = fp->fsize - fp->fptr; 02521 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 02522 02523 for ( ; btr; /* Repeat until all data read */ 02524 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { 02525 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 02526 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 02527 if (!csect) { /* On the cluster boundary? */ 02528 if (fp->fptr == 0) { /* On the top of the file? */ 02529 clst = fp->sclust; /* Follow from the origin */ 02530 } else { /* Middle or end of the file */ 02531 #if _USE_FASTSEEK 02532 if (fp->cltbl) 02533 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 02534 else 02535 #endif 02536 clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */ 02537 } 02538 if (clst < 2) ABORT(fp->fs, FR_INT_ERR); 02539 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02540 fp->clust = clst; /* Update current cluster */ 02541 } 02542 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ 02543 if (!sect) ABORT(fp->fs, FR_INT_ERR); 02544 sect += csect; 02545 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */ 02546 if (cc) { /* Read maximum contiguous sectors directly */ 02547 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 02548 cc = fp->fs->csize - csect; 02549 if (disk_read(fp->fs->drv, rbuff, sect, cc)) 02550 ABORT(fp->fs, FR_DISK_ERR); 02551 #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ 02552 #if _FS_TINY 02553 if (fp->fs->wflag && fp->fs->winsect - sect < cc) 02554 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win.d8, SS(fp->fs)); 02555 #else 02556 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) 02557 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf.d8, SS(fp->fs)); 02558 #endif 02559 #endif 02560 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 02561 continue; 02562 } 02563 #if !_FS_TINY 02564 if (fp->dsect != sect) { /* Load data sector if not in cache */ 02565 #if !_FS_READONLY 02566 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 02567 if (disk_write(fp->fs->drv, fp->buf.d8, fp->dsect, 1)) 02568 ABORT(fp->fs, FR_DISK_ERR); 02569 fp->flag &= ~FA__DIRTY; 02570 } 02571 #endif 02572 if (disk_read(fp->fs->drv, fp->buf.d8, sect, 1)) /* Fill sector cache */ 02573 ABORT(fp->fs, FR_DISK_ERR); 02574 } 02575 #endif 02576 fp->dsect = sect; 02577 } 02578 rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */ 02579 if (rcnt > btr) rcnt = btr; 02580 #if _FS_TINY 02581 if (move_window(fp->fs, fp->dsect)) /* Move sector window */ 02582 ABORT(fp->fs, FR_DISK_ERR); 02583 mem_cpy(rbuff, &fp->fs->win.d8[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 02584 #else 02585 mem_cpy(rbuff, &fp->buf.d8[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */ 02586 #endif 02587 } 02588 02589 LEAVE_FF(fp->fs, FR_OK); 02590 } 02591 02592 02593 02594 02595 #if !_FS_READONLY 02596 /*-----------------------------------------------------------------------*/ 02597 /* Write File */ 02598 /*-----------------------------------------------------------------------*/ 02599 02600 FRESULT f_write ( 02601 FIL* fp, /* Pointer to the file object */ 02602 const void *buff, /* Pointer to the data to be written */ 02603 UINT btw, /* Number of bytes to write */ 02604 UINT* bw /* Pointer to number of bytes written */ 02605 ) 02606 { 02607 FRESULT res; 02608 DWORD clst, sect; 02609 UINT wcnt, cc; 02610 const BYTE *wbuff = (const BYTE*)buff; 02611 BYTE csect; 02612 02613 02614 *bw = 0; /* Clear write byte counter */ 02615 02616 res = validate(fp); /* Check validity */ 02617 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02618 if (fp->err) /* Check error */ 02619 LEAVE_FF(fp->fs, (FRESULT)fp->err); 02620 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 02621 LEAVE_FF(fp->fs, FR_DENIED); 02622 if (fp->fptr + btw < fp->fptr) btw = 0; /* File size cannot reach 4GB */ 02623 02624 for ( ; btw; /* Repeat until all data written */ 02625 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) { 02626 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 02627 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 02628 if (!csect) { /* On the cluster boundary? */ 02629 if (fp->fptr == 0) { /* On the top of the file? */ 02630 clst = fp->sclust; /* Follow from the origin */ 02631 if (clst == 0) /* When no cluster is allocated, */ 02632 fp->sclust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */ 02633 } else { /* Middle or end of the file */ 02634 #if _USE_FASTSEEK 02635 if (fp->cltbl) 02636 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 02637 else 02638 #endif 02639 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */ 02640 } 02641 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ 02642 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 02643 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02644 fp->clust = clst; /* Update current cluster */ 02645 } 02646 #if _FS_TINY 02647 if (fp->fs->winsect == fp->dsect && sync_window(fp->fs)) /* Write-back sector cache */ 02648 ABORT(fp->fs, FR_DISK_ERR); 02649 #else 02650 if (fp->flag & FA__DIRTY) { /* Write-back sector cache */ 02651 if (disk_write(fp->fs->drv, fp->buf.d8, fp->dsect, 1)) 02652 ABORT(fp->fs, FR_DISK_ERR); 02653 fp->flag &= ~FA__DIRTY; 02654 } 02655 #endif 02656 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */ 02657 if (!sect) ABORT(fp->fs, FR_INT_ERR); 02658 sect += csect; 02659 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */ 02660 if (cc) { /* Write maximum contiguous sectors directly */ 02661 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */ 02662 cc = fp->fs->csize - csect; 02663 if (disk_write(fp->fs->drv, wbuff, sect, cc)) 02664 ABORT(fp->fs, FR_DISK_ERR); 02665 #if _FS_MINIMIZE <= 2 02666 #if _FS_TINY 02667 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 02668 mem_cpy(fp->fs->win.d8, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs)); 02669 fp->fs->wflag = 0; 02670 } 02671 #else 02672 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 02673 mem_cpy(fp->buf.d8, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs)); 02674 fp->flag &= ~FA__DIRTY; 02675 } 02676 #endif 02677 #endif 02678 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ 02679 continue; 02680 } 02681 #if _FS_TINY 02682 if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */ 02683 if (sync_window(fp->fs)) ABORT(fp->fs, FR_DISK_ERR); 02684 fp->fs->winsect = sect; 02685 } 02686 #else 02687 if (fp->dsect != sect) { /* Fill sector cache with file data */ 02688 if (fp->fptr < fp->fsize && 02689 disk_read(fp->fs->drv, fp->buf.d8, sect, 1)) 02690 ABORT(fp->fs, FR_DISK_ERR); 02691 } 02692 #endif 02693 fp->dsect = sect; 02694 } 02695 wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */ 02696 if (wcnt > btw) wcnt = btw; 02697 #if _FS_TINY 02698 if (move_window(fp->fs, fp->dsect)) /* Move sector window */ 02699 ABORT(fp->fs, FR_DISK_ERR); 02700 mem_cpy(&fp->fs->win.d8[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 02701 fp->fs->wflag = 1; 02702 #else 02703 mem_cpy(&fp->buf.d8[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */ 02704 fp->flag |= FA__DIRTY; 02705 #endif 02706 } 02707 02708 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */ 02709 fp->flag |= FA__WRITTEN; /* Set file change flag */ 02710 02711 LEAVE_FF(fp->fs, FR_OK); 02712 } 02713 02714 02715 02716 02717 /*-----------------------------------------------------------------------*/ 02718 /* Synchronize the File */ 02719 /*-----------------------------------------------------------------------*/ 02720 02721 FRESULT f_sync ( 02722 FIL* fp /* Pointer to the file object */ 02723 ) 02724 { 02725 FRESULT res; 02726 DWORD tm; 02727 BYTE *dir; 02728 02729 02730 res = validate(fp); /* Check validity of the object */ 02731 if (res == FR_OK) { 02732 if (fp->flag & FA__WRITTEN) { /* Has the file been written? */ 02733 /* Write-back dirty buffer */ 02734 #if !_FS_TINY 02735 if (fp->flag & FA__DIRTY) { 02736 if (disk_write(fp->fs->drv, fp->buf.d8, fp->dsect, 1)) 02737 LEAVE_FF(fp->fs, FR_DISK_ERR); 02738 fp->flag &= ~FA__DIRTY; 02739 } 02740 #endif 02741 /* Update the directory entry */ 02742 res = move_window(fp->fs, fp->dir_sect); 02743 if (res == FR_OK) { 02744 dir = fp->dir_ptr; 02745 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ 02746 ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */ 02747 st_clust(dir, fp->sclust); /* Update start cluster */ 02748 tm = get_fattime(); /* Update updated time */ 02749 ST_DWORD(dir+DIR_WrtTime, tm); 02750 ST_WORD(dir+DIR_LstAccDate, 0); 02751 fp->flag &= ~FA__WRITTEN; 02752 fp->fs->wflag = 1; 02753 res = sync_fs(fp->fs); 02754 } 02755 } 02756 } 02757 02758 LEAVE_FF(fp->fs, res); 02759 } 02760 02761 #endif /* !_FS_READONLY */ 02762 02763 02764 02765 02766 /*-----------------------------------------------------------------------*/ 02767 /* Close File */ 02768 /*-----------------------------------------------------------------------*/ 02769 02770 FRESULT f_close ( 02771 FIL *fp /* Pointer to the file object to be closed */ 02772 ) 02773 { 02774 FRESULT res; 02775 02776 02777 #if !_FS_READONLY 02778 res = f_sync(fp); /* Flush cached data */ 02779 if (res == FR_OK) 02780 #endif 02781 { 02782 res = validate(fp); /* Lock volume */ 02783 if (res == FR_OK) { 02784 #if _FS_REENTRANT 02785 FATFS *fs = fp->fs; 02786 #endif 02787 #if _FS_LOCK 02788 res = dec_lock(fp->lockid); /* Decrement file open counter */ 02789 if (res == FR_OK) 02790 #endif 02791 fp->fs = 0; /* Invalidate file object */ 02792 #if _FS_REENTRANT 02793 unlock_fs(fs, FR_OK); /* Unlock volume */ 02794 #endif 02795 } 02796 } 02797 return res; 02798 } 02799 02800 02801 02802 02803 /*-----------------------------------------------------------------------*/ 02804 /* Change Current Directory or Current Drive, Get Current Directory */ 02805 /*-----------------------------------------------------------------------*/ 02806 02807 #if _FS_RPATH >= 1 02808 #if _VOLUMES >= 2 02809 FRESULT f_chdrive ( 02810 const TCHAR* path /* Drive number */ 02811 ) 02812 { 02813 int vol; 02814 02815 02816 vol = get_ldnumber(&path); 02817 if (vol < 0) return FR_INVALID_DRIVE; 02818 02819 CurrVol = (BYTE)vol; 02820 02821 return FR_OK; 02822 } 02823 #endif 02824 02825 02826 FRESULT f_chdir ( 02827 const TCHAR* path /* Pointer to the directory path */ 02828 ) 02829 { 02830 FRESULT res; 02831 DIR dj; 02832 DEF_NAMEBUF; 02833 02834 02835 /* Get logical drive number */ 02836 res = find_volume(&dj.fs, &path, 0); 02837 if (res == FR_OK) { 02838 INIT_BUF(dj); 02839 res = follow_path(&dj, path); /* Follow the path */ 02840 FREE_BUF(); 02841 if (res == FR_OK) { /* Follow completed */ 02842 if (!dj.dir) { 02843 dj.fs->cdir = dj.sclust; /* Start directory itself */ 02844 } else { 02845 if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */ 02846 dj.fs->cdir = ld_clust(dj.fs, dj.dir); 02847 else 02848 res = FR_NO_PATH; /* Reached but a file */ 02849 } 02850 } 02851 if (res == FR_NO_FILE) res = FR_NO_PATH; 02852 } 02853 02854 LEAVE_FF(dj.fs, res); 02855 } 02856 02857 02858 #if _FS_RPATH >= 2 02859 FRESULT f_getcwd ( 02860 TCHAR* buff, /* Pointer to the directory path */ 02861 UINT len /* Size of path */ 02862 ) 02863 { 02864 FRESULT res; 02865 DIR dj; 02866 UINT i, n; 02867 DWORD ccl; 02868 TCHAR *tp; 02869 FILINFO fno; 02870 DEF_NAMEBUF; 02871 02872 02873 *buff = 0; 02874 /* Get logical drive number */ 02875 res = find_volume(&dj.fs, (const TCHAR**)&buff, 0); /* Get current volume */ 02876 if (res == FR_OK) { 02877 INIT_BUF(dj); 02878 i = len; /* Bottom of buffer (directory stack base) */ 02879 dj.sclust = dj.fs->cdir; /* Start to follow upper directory from current directory */ 02880 while ((ccl = dj.sclust) != 0) { /* Repeat while current directory is a sub-directory */ 02881 res = dir_sdi(&dj, 1); /* Get parent directory */ 02882 if (res != FR_OK) break; 02883 res = dir_read(&dj, 0); 02884 if (res != FR_OK) break; 02885 dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent directory */ 02886 res = dir_sdi(&dj, 0); 02887 if (res != FR_OK) break; 02888 do { /* Find the entry links to the child directory */ 02889 res = dir_read(&dj, 0); 02890 if (res != FR_OK) break; 02891 if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */ 02892 res = dir_next(&dj, 0); 02893 } while (res == FR_OK); 02894 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ 02895 if (res != FR_OK) break; 02896 #if _USE_LFN 02897 fno.lfname = buff; 02898 fno.lfsize = i; 02899 #endif 02900 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */ 02901 tp = fno.fname; 02902 #if _USE_LFN 02903 if (*buff) tp = buff; 02904 #endif 02905 for (n = 0; tp[n]; n++) ; 02906 if (i < n + 3) { 02907 res = FR_NOT_ENOUGH_CORE; break; 02908 } 02909 while (n) buff[--i] = tp[--n]; 02910 buff[--i] = '/'; 02911 } 02912 tp = buff; 02913 if (res == FR_OK) { 02914 #if _VOLUMES >= 2 02915 *tp++ = '0' + CurrVol; /* Put drive number */ 02916 *tp++ = ':'; 02917 #endif 02918 if (i == len) { /* Root-directory */ 02919 *tp++ = '/'; 02920 } else { /* Sub-directroy */ 02921 do /* Add stacked path str */ 02922 *tp++ = buff[i++]; 02923 while (i < len); 02924 } 02925 } 02926 *tp = 0; 02927 FREE_BUF(); 02928 } 02929 02930 LEAVE_FF(dj.fs, res); 02931 } 02932 #endif /* _FS_RPATH >= 2 */ 02933 #endif /* _FS_RPATH >= 1 */ 02934 02935 02936 02937 #if _FS_MINIMIZE <= 2 02938 /*-----------------------------------------------------------------------*/ 02939 /* Seek File R/W Pointer */ 02940 /*-----------------------------------------------------------------------*/ 02941 02942 FRESULT f_lseek ( 02943 FIL* fp, /* Pointer to the file object */ 02944 DWORD ofs /* File pointer from top of file */ 02945 ) 02946 { 02947 FRESULT res; 02948 02949 02950 res = validate(fp); /* Check validity of the object */ 02951 if (res != FR_OK) LEAVE_FF(fp->fs, res); 02952 if (fp->err) /* Check error */ 02953 LEAVE_FF(fp->fs, (FRESULT)fp->err); 02954 02955 #if _USE_FASTSEEK 02956 if (fp->cltbl) { /* Fast seek */ 02957 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl; 02958 02959 if (ofs == CREATE_LINKMAP) { /* Create CLMT */ 02960 tbl = fp->cltbl; 02961 tlen = *tbl++; ulen = 2; /* Given table size and required table size */ 02962 cl = fp->sclust; /* Top of the chain */ 02963 if (cl) { 02964 do { 02965 /* Get a fragment */ 02966 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */ 02967 do { 02968 pcl = cl; ncl++; 02969 cl = get_fat(fp->fs, cl); 02970 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR); 02971 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 02972 } while (cl == pcl + 1); 02973 if (ulen <= tlen) { /* Store the length and top of the fragment */ 02974 *tbl++ = ncl; *tbl++ = tcl; 02975 } 02976 } while (cl < fp->fs->n_fatent); /* Repeat until end of chain */ 02977 } 02978 *fp->cltbl = ulen; /* Number of items used */ 02979 if (ulen <= tlen) 02980 *tbl = 0; /* Terminate table */ 02981 else 02982 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */ 02983 02984 } else { /* Fast seek */ 02985 if (ofs > fp->fsize) /* Clip offset at the file size */ 02986 ofs = fp->fsize; 02987 fp->fptr = ofs; /* Set file pointer */ 02988 if (ofs) { 02989 fp->clust = clmt_clust(fp, ofs - 1); 02990 dsc = clust2sect(fp->fs, fp->clust); 02991 if (!dsc) ABORT(fp->fs, FR_INT_ERR); 02992 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1); 02993 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */ 02994 #if !_FS_TINY 02995 #if !_FS_READONLY 02996 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 02997 if (disk_write(fp->fs->drv, fp->buf.d8, fp->dsect, 1)) 02998 ABORT(fp->fs, FR_DISK_ERR); 02999 fp->flag &= ~FA__DIRTY; 03000 } 03001 #endif 03002 if (disk_read(fp->fs->drv, fp->buf.d8, dsc, 1)) /* Load current sector */ 03003 ABORT(fp->fs, FR_DISK_ERR); 03004 #endif 03005 fp->dsect = dsc; 03006 } 03007 } 03008 } 03009 } else 03010 #endif 03011 03012 /* Normal Seek */ 03013 { 03014 DWORD clst, bcs, nsect, ifptr; 03015 03016 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */ 03017 #if !_FS_READONLY 03018 && !(fp->flag & FA_WRITE) 03019 #endif 03020 ) ofs = fp->fsize; 03021 03022 ifptr = fp->fptr; 03023 fp->fptr = nsect = 0; 03024 if (ofs) { 03025 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */ 03026 if (ifptr > 0 && 03027 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ 03028 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */ 03029 ofs -= fp->fptr; 03030 clst = fp->clust; 03031 } else { /* When seek to back cluster, */ 03032 clst = fp->sclust; /* start from the first cluster */ 03033 #if !_FS_READONLY 03034 if (clst == 0) { /* If no cluster chain, create a new chain */ 03035 clst = create_chain(fp->fs, 0); 03036 if (clst == 1) ABORT(fp->fs, FR_INT_ERR); 03037 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 03038 fp->sclust = clst; 03039 } 03040 #endif 03041 fp->clust = clst; 03042 } 03043 if (clst != 0) { 03044 while (ofs > bcs) { /* Cluster following loop */ 03045 #if !_FS_READONLY 03046 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ 03047 clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */ 03048 if (clst == 0) { /* When disk gets full, clip file size */ 03049 ofs = bcs; break; 03050 } 03051 } else 03052 #endif 03053 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */ 03054 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 03055 if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR); 03056 fp->clust = clst; 03057 fp->fptr += bcs; 03058 ofs -= bcs; 03059 } 03060 fp->fptr += ofs; 03061 if (ofs % SS(fp->fs)) { 03062 nsect = clust2sect(fp->fs, clst); /* Current sector */ 03063 if (!nsect) ABORT(fp->fs, FR_INT_ERR); 03064 nsect += ofs / SS(fp->fs); 03065 } 03066 } 03067 } 03068 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */ 03069 #if !_FS_TINY 03070 #if !_FS_READONLY 03071 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */ 03072 if (disk_write(fp->fs->drv, fp->buf.d8, fp->dsect, 1)) 03073 ABORT(fp->fs, FR_DISK_ERR); 03074 fp->flag &= ~FA__DIRTY; 03075 } 03076 #endif 03077 if (disk_read(fp->fs->drv, fp->buf.d8, nsect, 1)) /* Fill sector cache */ 03078 ABORT(fp->fs, FR_DISK_ERR); 03079 #endif 03080 fp->dsect = nsect; 03081 } 03082 #if !_FS_READONLY 03083 if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */ 03084 fp->fsize = fp->fptr; 03085 fp->flag |= FA__WRITTEN; 03086 } 03087 #endif 03088 } 03089 03090 LEAVE_FF(fp->fs, res); 03091 } 03092 03093 03094 03095 #if _FS_MINIMIZE <= 1 03096 /*-----------------------------------------------------------------------*/ 03097 /* Create a Directory Object */ 03098 /*-----------------------------------------------------------------------*/ 03099 03100 FRESULT f_opendir ( 03101 DIR* dp, /* Pointer to directory object to create */ 03102 const TCHAR* path /* Pointer to the directory path */ 03103 ) 03104 { 03105 FRESULT res; 03106 FATFS* fs; 03107 DEF_NAMEBUF; 03108 03109 03110 if (!dp) return FR_INVALID_OBJECT; 03111 03112 /* Get logical drive number */ 03113 res = find_volume(&fs, &path, 0); 03114 if (res == FR_OK) { 03115 dp->fs = fs; 03116 INIT_BUF(*dp); 03117 res = follow_path(dp, path); /* Follow the path to the directory */ 03118 FREE_BUF(); 03119 if (res == FR_OK) { /* Follow completed */ 03120 if (dp->dir) { /* It is not the origin directory itself */ 03121 if (dp->dir[DIR_Attr] & AM_DIR) /* The object is a sub directory */ 03122 dp->sclust = ld_clust(fs, dp->dir); 03123 else /* The object is a file */ 03124 res = FR_NO_PATH; 03125 } 03126 if (res == FR_OK) { 03127 dp->id = fs->id; 03128 res = dir_sdi(dp, 0); /* Rewind directory */ 03129 #if _FS_LOCK 03130 if (res == FR_OK) { 03131 if (dp->sclust) { 03132 dp->lockid = inc_lock(dp, 0); /* Lock the sub directory */ 03133 if (!dp->lockid) 03134 res = FR_TOO_MANY_OPEN_FILES; 03135 } else { 03136 dp->lockid = 0; /* Root directory need not to be locked */ 03137 } 03138 } 03139 #endif 03140 } 03141 } 03142 if (res == FR_NO_FILE) res = FR_NO_PATH; 03143 } 03144 if (res != FR_OK) dp->fs = 0; /* Invalidate the directory object if function faild */ 03145 03146 LEAVE_FF(fs, res); 03147 } 03148 03149 03150 03151 03152 /*-----------------------------------------------------------------------*/ 03153 /* Close Directory */ 03154 /*-----------------------------------------------------------------------*/ 03155 03156 FRESULT f_closedir ( 03157 DIR *dp /* Pointer to the directory object to be closed */ 03158 ) 03159 { 03160 FRESULT res; 03161 03162 03163 res = validate(dp); 03164 if (res == FR_OK) { 03165 #if _FS_REENTRANT 03166 FATFS *fs = dp->fs; 03167 #endif 03168 #if _FS_LOCK 03169 if (dp->lockid) /* Decrement sub-directory open counter */ 03170 res = dec_lock(dp->lockid); 03171 if (res == FR_OK) 03172 #endif 03173 dp->fs = 0; /* Invalidate directory object */ 03174 #if _FS_REENTRANT 03175 unlock_fs(fs, FR_OK); /* Unlock volume */ 03176 #endif 03177 } 03178 return res; 03179 } 03180 03181 03182 03183 03184 /*-----------------------------------------------------------------------*/ 03185 /* Read Directory Entries in Sequence */ 03186 /*-----------------------------------------------------------------------*/ 03187 03188 FRESULT f_readdir ( 03189 DIR* dp, /* Pointer to the open directory object */ 03190 FILINFO* fno /* Pointer to file information to return */ 03191 ) 03192 { 03193 FRESULT res; 03194 DEF_NAMEBUF; 03195 03196 03197 res = validate(dp); /* Check validity of the object */ 03198 if (res == FR_OK) { 03199 if (!fno) { 03200 res = dir_sdi(dp, 0); /* Rewind the directory object */ 03201 } else { 03202 INIT_BUF(*dp); 03203 res = dir_read(dp, 0); /* Read an item */ 03204 if (res == FR_NO_FILE) { /* Reached end of directory */ 03205 dp->sect = 0; 03206 res = FR_OK; 03207 } 03208 if (res == FR_OK) { /* A valid entry is found */ 03209 get_fileinfo(dp, fno); /* Get the object information */ 03210 res = dir_next(dp, 0); /* Increment index for next */ 03211 if (res == FR_NO_FILE) { 03212 dp->sect = 0; 03213 res = FR_OK; 03214 } 03215 } 03216 FREE_BUF(); 03217 } 03218 } 03219 03220 LEAVE_FF(dp->fs, res); 03221 } 03222 03223 03224 03225 #if _FS_MINIMIZE == 0 03226 /*-----------------------------------------------------------------------*/ 03227 /* Get File Status */ 03228 /*-----------------------------------------------------------------------*/ 03229 03230 FRESULT f_stat ( 03231 const TCHAR* path, /* Pointer to the file path */ 03232 FILINFO* fno /* Pointer to file information to return */ 03233 ) 03234 { 03235 FRESULT res; 03236 DIR dj; 03237 DEF_NAMEBUF; 03238 03239 03240 /* Get logical drive number */ 03241 res = find_volume(&dj.fs, &path, 0); 03242 if (res == FR_OK) { 03243 INIT_BUF(dj); 03244 res = follow_path(&dj, path); /* Follow the file path */ 03245 if (res == FR_OK) { /* Follow completed */ 03246 if (dj.dir) { /* Found an object */ 03247 if (fno) get_fileinfo(&dj, fno); 03248 } else { /* It is root directory */ 03249 res = FR_INVALID_NAME; 03250 } 03251 } 03252 FREE_BUF(); 03253 } 03254 03255 LEAVE_FF(dj.fs, res); 03256 } 03257 03258 03259 03260 #if !_FS_READONLY 03261 /*-----------------------------------------------------------------------*/ 03262 /* Get Number of Free Clusters */ 03263 /*-----------------------------------------------------------------------*/ 03264 03265 FRESULT f_getfree ( 03266 const TCHAR* path, /* Path name of the logical drive number */ 03267 DWORD* nclst, /* Pointer to a variable to return number of free clusters */ 03268 FATFS** fatfs /* Pointer to return pointer to corresponding file system object */ 03269 ) 03270 { 03271 FRESULT res; 03272 FATFS *fs; 03273 DWORD n, clst, sect, stat; 03274 UINT i; 03275 BYTE fat, *p; 03276 03277 03278 /* Get logical drive number */ 03279 res = find_volume(fatfs, &path, 0); 03280 fs = *fatfs; 03281 if (res == FR_OK) { 03282 /* If free_clust is valid, return it without full cluster scan */ 03283 if (fs->free_clust <= fs->n_fatent - 2) { 03284 *nclst = fs->free_clust; 03285 } else { 03286 /* Get number of free clusters */ 03287 fat = fs->fs_type; 03288 n = 0; 03289 if (fat == FS_FAT12) { 03290 clst = 2; 03291 do { 03292 stat = get_fat(fs, clst); 03293 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 03294 if (stat == 1) { res = FR_INT_ERR; break; } 03295 if (stat == 0) n++; 03296 } while (++clst < fs->n_fatent); 03297 } else { 03298 clst = fs->n_fatent; 03299 sect = fs->fatbase; 03300 i = 0; p = 0; 03301 do { 03302 if (!i) { 03303 res = move_window(fs, sect++); 03304 if (res != FR_OK) break; 03305 p = fs->win.d8; 03306 i = SS(fs); 03307 } 03308 if (fat == FS_FAT16) { 03309 if (LD_WORD(p) == 0) n++; 03310 p += 2; i -= 2; 03311 } else { 03312 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++; 03313 p += 4; i -= 4; 03314 } 03315 } while (--clst); 03316 } 03317 fs->free_clust = n; 03318 fs->fsi_flag |= 1; 03319 *nclst = n; 03320 } 03321 } 03322 LEAVE_FF(fs, res); 03323 } 03324 03325 03326 03327 03328 /*-----------------------------------------------------------------------*/ 03329 /* Truncate File */ 03330 /*-----------------------------------------------------------------------*/ 03331 03332 FRESULT f_truncate ( 03333 FIL* fp /* Pointer to the file object */ 03334 ) 03335 { 03336 FRESULT res; 03337 DWORD ncl; 03338 03339 03340 res = validate(fp); /* Check validity of the object */ 03341 if (res == FR_OK) { 03342 if (fp->err) { /* Check error */ 03343 res = (FRESULT)fp->err; 03344 } else { 03345 if (!(fp->flag & FA_WRITE)) /* Check access mode */ 03346 res = FR_DENIED; 03347 } 03348 } 03349 if (res == FR_OK) { 03350 if (fp->fsize > fp->fptr) { 03351 fp->fsize = fp->fptr; /* Set file size to current R/W point */ 03352 fp->flag |= FA__WRITTEN; 03353 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ 03354 res = remove_chain(fp->fs, fp->sclust); 03355 fp->sclust = 0; 03356 } else { /* When truncate a part of the file, remove remaining clusters */ 03357 ncl = get_fat(fp->fs, fp->clust); 03358 res = FR_OK; 03359 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; 03360 if (ncl == 1) res = FR_INT_ERR; 03361 if (res == FR_OK && ncl < fp->fs->n_fatent) { 03362 res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF); 03363 if (res == FR_OK) res = remove_chain(fp->fs, ncl); 03364 } 03365 } 03366 #if !_FS_TINY 03367 if (res == FR_OK && (fp->flag & FA__DIRTY)) { 03368 if (disk_write(fp->fs->drv, fp->buf.d8, fp->dsect, 1)) 03369 res = FR_DISK_ERR; 03370 else 03371 fp->flag &= ~FA__DIRTY; 03372 } 03373 #endif 03374 } 03375 if (res != FR_OK) fp->err = (FRESULT)res; 03376 } 03377 03378 LEAVE_FF(fp->fs, res); 03379 } 03380 03381 03382 03383 03384 /*-----------------------------------------------------------------------*/ 03385 /* Delete a File or Directory */ 03386 /*-----------------------------------------------------------------------*/ 03387 03388 FRESULT f_unlink ( 03389 const TCHAR* path /* Pointer to the file or directory path */ 03390 ) 03391 { 03392 FRESULT res; 03393 DIR dj, sdj; 03394 BYTE *dir; 03395 DWORD dclst; 03396 DEF_NAMEBUF; 03397 03398 03399 /* Get logical drive number */ 03400 res = find_volume(&dj.fs, &path, 1); 03401 if (res == FR_OK) { 03402 INIT_BUF(dj); 03403 res = follow_path(&dj, path); /* Follow the file path */ 03404 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 03405 res = FR_INVALID_NAME; /* Cannot remove dot entry */ 03406 #if _FS_LOCK 03407 if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open file */ 03408 #endif 03409 if (res == FR_OK) { /* The object is accessible */ 03410 dir = dj.dir; 03411 if (!dir) { 03412 res = FR_INVALID_NAME; /* Cannot remove the start directory */ 03413 } else { 03414 if (dir[DIR_Attr] & AM_RDO) 03415 res = FR_DENIED; /* Cannot remove R/O object */ 03416 } 03417 dclst = ld_clust(dj.fs, dir); 03418 if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */ 03419 if (dclst < 2) { 03420 res = FR_INT_ERR; 03421 } else { 03422 mem_cpy(&sdj, &dj, sizeof (DIR)); /* Check if the sub-directory is empty or not */ 03423 sdj.sclust = dclst; 03424 res = dir_sdi(&sdj, 2); /* Exclude dot entries */ 03425 if (res == FR_OK) { 03426 res = dir_read(&sdj, 0); /* Read an item */ 03427 if (res == FR_OK /* Not empty directory */ 03428 #if _FS_RPATH 03429 || dclst == dj.fs->cdir /* Current directory */ 03430 #endif 03431 ) res = FR_DENIED; 03432 if (res == FR_NO_FILE) res = FR_OK; /* Empty */ 03433 } 03434 } 03435 } 03436 if (res == FR_OK) { 03437 res = dir_remove(&dj); /* Remove the directory entry */ 03438 if (res == FR_OK) { 03439 if (dclst) /* Remove the cluster chain if exist */ 03440 res = remove_chain(dj.fs, dclst); 03441 if (res == FR_OK) res = sync_fs(dj.fs); 03442 } 03443 } 03444 } 03445 FREE_BUF(); 03446 } 03447 03448 LEAVE_FF(dj.fs, res); 03449 } 03450 03451 03452 03453 03454 /*-----------------------------------------------------------------------*/ 03455 /* Create a Directory */ 03456 /*-----------------------------------------------------------------------*/ 03457 03458 FRESULT f_mkdir ( 03459 const TCHAR* path /* Pointer to the directory path */ 03460 ) 03461 { 03462 FRESULT res; 03463 DIR dj; 03464 BYTE *dir, n; 03465 DWORD dsc, dcl, pcl, tm = get_fattime(); 03466 DEF_NAMEBUF; 03467 03468 03469 /* Get logical drive number */ 03470 res = find_volume(&dj.fs, &path, 1); 03471 if (res == FR_OK) { 03472 INIT_BUF(dj); 03473 res = follow_path(&dj, path); /* Follow the file path */ 03474 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */ 03475 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT)) 03476 res = FR_INVALID_NAME; 03477 if (res == FR_NO_FILE) { /* Can create a new directory */ 03478 dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */ 03479 res = FR_OK; 03480 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */ 03481 if (dcl == 1) res = FR_INT_ERR; 03482 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; 03483 if (res == FR_OK) /* Flush FAT */ 03484 res = sync_window(dj.fs); 03485 if (res == FR_OK) { /* Initialize the new directory table */ 03486 dsc = clust2sect(dj.fs, dcl); 03487 dir = dj.fs->win.d8; 03488 mem_set(dir, 0, SS(dj.fs)); 03489 mem_set(dir+DIR_Name, ' ', 11); /* Create "." entry */ 03490 dir[DIR_Name] = '.'; 03491 dir[DIR_Attr] = AM_DIR; 03492 ST_DWORD(dir+DIR_WrtTime, tm); 03493 st_clust(dir, dcl); 03494 mem_cpy(dir+SZ_DIR, dir, SZ_DIR); /* Create ".." entry */ 03495 dir[SZ_DIR+1] = '.'; pcl = dj.sclust; 03496 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase) 03497 pcl = 0; 03498 st_clust(dir+SZ_DIR, pcl); 03499 for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */ 03500 dj.fs->winsect = dsc++; 03501 dj.fs->wflag = 1; 03502 res = sync_window(dj.fs); 03503 if (res != FR_OK) break; 03504 mem_set(dir, 0, SS(dj.fs)); 03505 } 03506 } 03507 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */ 03508 if (res != FR_OK) { 03509 remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */ 03510 } else { 03511 dir = dj.dir; 03512 dir[DIR_Attr] = AM_DIR; /* Attribute */ 03513 ST_DWORD(dir+DIR_WrtTime, tm); /* Created time */ 03514 st_clust(dir, dcl); /* Table start cluster */ 03515 dj.fs->wflag = 1; 03516 res = sync_fs(dj.fs); 03517 } 03518 } 03519 FREE_BUF(); 03520 } 03521 03522 LEAVE_FF(dj.fs, res); 03523 } 03524 03525 03526 03527 03528 /*-----------------------------------------------------------------------*/ 03529 /* Change Attribute */ 03530 /*-----------------------------------------------------------------------*/ 03531 03532 FRESULT f_chmod ( 03533 const TCHAR* path, /* Pointer to the file path */ 03534 BYTE value, /* Attribute bits */ 03535 BYTE mask /* Attribute mask to change */ 03536 ) 03537 { 03538 FRESULT res; 03539 DIR dj; 03540 BYTE *dir; 03541 DEF_NAMEBUF; 03542 03543 03544 /* Get logical drive number */ 03545 res = find_volume(&dj.fs, &path, 1); 03546 if (res == FR_OK) { 03547 INIT_BUF(dj); 03548 res = follow_path(&dj, path); /* Follow the file path */ 03549 FREE_BUF(); 03550 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 03551 res = FR_INVALID_NAME; 03552 if (res == FR_OK) { 03553 dir = dj.dir; 03554 if (!dir) { /* Is it a root directory? */ 03555 res = FR_INVALID_NAME; 03556 } else { /* File or sub directory */ 03557 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ 03558 dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 03559 dj.fs->wflag = 1; 03560 res = sync_fs(dj.fs); 03561 } 03562 } 03563 } 03564 03565 LEAVE_FF(dj.fs, res); 03566 } 03567 03568 03569 03570 03571 /*-----------------------------------------------------------------------*/ 03572 /* Change Timestamp */ 03573 /*-----------------------------------------------------------------------*/ 03574 03575 FRESULT f_utime ( 03576 const TCHAR* path, /* Pointer to the file/directory name */ 03577 const FILINFO* fno /* Pointer to the time stamp to be set */ 03578 ) 03579 { 03580 FRESULT res; 03581 DIR dj; 03582 BYTE *dir; 03583 DEF_NAMEBUF; 03584 03585 03586 /* Get logical drive number */ 03587 res = find_volume(&dj.fs, &path, 1); 03588 if (res == FR_OK) { 03589 INIT_BUF(dj); 03590 res = follow_path(&dj, path); /* Follow the file path */ 03591 FREE_BUF(); 03592 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT)) 03593 res = FR_INVALID_NAME; 03594 if (res == FR_OK) { 03595 dir = dj.dir; 03596 if (!dir) { /* Root directory */ 03597 res = FR_INVALID_NAME; 03598 } else { /* File or sub-directory */ 03599 ST_WORD(dir+DIR_WrtTime, fno->ftime); 03600 ST_WORD(dir+DIR_WrtDate, fno->fdate); 03601 dj.fs->wflag = 1; 03602 res = sync_fs(dj.fs); 03603 } 03604 } 03605 } 03606 03607 LEAVE_FF(dj.fs, res); 03608 } 03609 03610 03611 03612 03613 /*-----------------------------------------------------------------------*/ 03614 /* Rename File/Directory */ 03615 /*-----------------------------------------------------------------------*/ 03616 03617 FRESULT f_rename ( 03618 const TCHAR* path_old, /* Pointer to the old name */ 03619 const TCHAR* path_new /* Pointer to the new name */ 03620 ) 03621 { 03622 FRESULT res; 03623 DIR djo, djn; 03624 BYTE buf[21], *dir; 03625 DWORD dw; 03626 DEF_NAMEBUF; 03627 03628 03629 /* Get logical drive number of the source object */ 03630 res = find_volume(&djo.fs, &path_old, 1); 03631 if (res == FR_OK) { 03632 djn.fs = djo.fs; 03633 INIT_BUF(djo); 03634 res = follow_path(&djo, path_old); /* Check old object */ 03635 if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT)) 03636 res = FR_INVALID_NAME; 03637 #if _FS_LOCK 03638 if (res == FR_OK) res = chk_lock(&djo, 2); 03639 #endif 03640 if (res == FR_OK) { /* Old object is found */ 03641 if (!djo.dir) { /* Is root dir? */ 03642 res = FR_NO_FILE; 03643 } else { 03644 mem_cpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except for name */ 03645 mem_cpy(&djn, &djo, sizeof (DIR)); /* Check new object */ 03646 res = follow_path(&djn, path_new); 03647 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */ 03648 if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */ 03649 /* Start critical section that any interruption can cause a cross-link */ 03650 res = dir_register(&djn); /* Register the new entry */ 03651 if (res == FR_OK) { 03652 dir = djn.dir; /* Copy object information except for name */ 03653 mem_cpy(dir+13, buf+2, 19); 03654 dir[DIR_Attr] = buf[0] | AM_ARC; 03655 djo.fs->wflag = 1; 03656 if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) { /* Update .. entry in the directory if needed */ 03657 dw = clust2sect(djo.fs, ld_clust(djo.fs, dir)); 03658 if (!dw) { 03659 res = FR_INT_ERR; 03660 } else { 03661 res = move_window(djo.fs, dw); 03662 dir = djo.fs->win.d8+SZ_DIR; /* .. entry */ 03663 if (res == FR_OK && dir[1] == '.') { 03664 dw = (djo.fs->fs_type == FS_FAT32 && djn.sclust == djo.fs->dirbase) ? 0 : djn.sclust; 03665 st_clust(dir, dw); 03666 djo.fs->wflag = 1; 03667 } 03668 } 03669 } 03670 if (res == FR_OK) { 03671 res = dir_remove(&djo); /* Remove old entry */ 03672 if (res == FR_OK) 03673 res = sync_fs(djo.fs); 03674 } 03675 } 03676 /* End critical section */ 03677 } 03678 } 03679 } 03680 FREE_BUF(); 03681 } 03682 03683 LEAVE_FF(djo.fs, res); 03684 } 03685 03686 #endif /* !_FS_READONLY */ 03687 #endif /* _FS_MINIMIZE == 0 */ 03688 #endif /* _FS_MINIMIZE <= 1 */ 03689 #endif /* _FS_MINIMIZE <= 2 */ 03690 03691 03692 03693 #if _USE_LABEL 03694 /*-----------------------------------------------------------------------*/ 03695 /* Get volume label */ 03696 /*-----------------------------------------------------------------------*/ 03697 03698 FRESULT f_getlabel ( 03699 const TCHAR* path, /* Path name of the logical drive number */ 03700 TCHAR* label, /* Pointer to a buffer to return the volume label */ 03701 DWORD* sn /* Pointer to a variable to return the volume serial number */ 03702 ) 03703 { 03704 FRESULT res; 03705 DIR dj; 03706 UINT i, j; 03707 03708 03709 /* Get logical drive number */ 03710 res = find_volume(&dj.fs, &path, 0); 03711 03712 /* Get volume label */ 03713 if (res == FR_OK && label) { 03714 dj.sclust = 0; /* Open root directory */ 03715 res = dir_sdi(&dj, 0); 03716 if (res == FR_OK) { 03717 res = dir_read(&dj, 1); /* Get an entry with AM_VOL */ 03718 if (res == FR_OK) { /* A volume label is exist */ 03719 #if _LFN_UNICODE 03720 WCHAR w; 03721 i = j = 0; 03722 do { 03723 w = (i < 11) ? dj.dir[i++] : ' '; 03724 if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i])) 03725 w = w << 8 | dj.dir[i++]; 03726 label[j++] = ff_convert(w, 1); /* OEM -> Unicode */ 03727 } while (j < 11); 03728 #else 03729 mem_cpy(label, dj.dir, 11); 03730 #endif 03731 j = 11; 03732 do { 03733 label[j] = 0; 03734 if (!j) break; 03735 } while (label[--j] == ' '); 03736 } 03737 if (res == FR_NO_FILE) { /* No label, return nul string */ 03738 label[0] = 0; 03739 res = FR_OK; 03740 } 03741 } 03742 } 03743 03744 /* Get volume serial number */ 03745 if (res == FR_OK && sn) { 03746 res = move_window(dj.fs, dj.fs->volbase); 03747 if (res == FR_OK) { 03748 i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID; 03749 *sn = LD_DWORD(&dj.fs->win.d8[i]); 03750 } 03751 } 03752 03753 LEAVE_FF(dj.fs, res); 03754 } 03755 03756 03757 03758 #if !_FS_READONLY 03759 /*-----------------------------------------------------------------------*/ 03760 /* Set volume label */ 03761 /*-----------------------------------------------------------------------*/ 03762 03763 FRESULT f_setlabel ( 03764 const TCHAR* label /* Pointer to the volume label to set */ 03765 ) 03766 { 03767 FRESULT res; 03768 DIR dj; 03769 BYTE vn[11]; 03770 UINT i, j, sl; 03771 WCHAR w; 03772 DWORD tm; 03773 03774 03775 /* Get logical drive number */ 03776 res = find_volume(&dj.fs, &label, 1); 03777 if (res) LEAVE_FF(dj.fs, res); 03778 03779 /* Create a volume label in directory form */ 03780 vn[0] = 0; 03781 for (sl = 0; label[sl]; sl++) ; /* Get name length */ 03782 for ( ; sl && label[sl-1] == ' '; sl--) ; /* Remove trailing spaces */ 03783 if (sl) { /* Create volume label in directory form */ 03784 i = j = 0; 03785 do { 03786 #if _LFN_UNICODE 03787 w = ff_convert(ff_wtoupper(label[i++]), 0); 03788 #else 03789 w = (BYTE)label[i++]; 03790 if (IsDBCS1(w)) 03791 w = (j < 10 && i < sl && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0; 03792 #if _USE_LFN 03793 w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0); 03794 #else 03795 if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */ 03796 #ifdef _EXCVT 03797 if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */ 03798 #else 03799 if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */ 03800 #endif 03801 #endif 03802 #endif 03803 if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid characters for volume label */ 03804 LEAVE_FF(dj.fs, FR_INVALID_NAME); 03805 if (w >= 0x100) vn[j++] = (BYTE)(w >> 8); 03806 vn[j++] = (BYTE)w; 03807 } while (i < sl); 03808 while (j < 11) vn[j++] = ' '; 03809 } 03810 03811 /* Set volume label */ 03812 dj.sclust = 0; /* Open root directory */ 03813 res = dir_sdi(&dj, 0); 03814 if (res == FR_OK) { 03815 res = dir_read(&dj, 1); /* Get an entry with AM_VOL */ 03816 if (res == FR_OK) { /* A volume label is found */ 03817 if (vn[0]) { 03818 mem_cpy(dj.dir, vn, 11); /* Change the volume label name */ 03819 tm = get_fattime(); 03820 ST_DWORD(dj.dir+DIR_WrtTime, tm); 03821 } else { 03822 dj.dir[0] = DDE; /* Remove the volume label */ 03823 } 03824 dj.fs->wflag = 1; 03825 res = sync_fs(dj.fs); 03826 } else { /* No volume label is found or error */ 03827 if (res == FR_NO_FILE) { 03828 res = FR_OK; 03829 if (vn[0]) { /* Create volume label as new */ 03830 res = dir_alloc(&dj, 1); /* Allocate an entry for volume label */ 03831 if (res == FR_OK) { 03832 mem_set(dj.dir, 0, SZ_DIR); /* Set volume label */ 03833 mem_cpy(dj.dir, vn, 11); 03834 dj.dir[DIR_Attr] = AM_VOL; 03835 tm = get_fattime(); 03836 ST_DWORD(dj.dir+DIR_WrtTime, tm); 03837 dj.fs->wflag = 1; 03838 res = sync_fs(dj.fs); 03839 } 03840 } 03841 } 03842 } 03843 } 03844 03845 LEAVE_FF(dj.fs, res); 03846 } 03847 03848 #endif /* !_FS_READONLY */ 03849 #endif /* _USE_LABEL */ 03850 03851 03852 03853 /*-----------------------------------------------------------------------*/ 03854 /* Forward data to the stream directly (available on only tiny cfg) */ 03855 /*-----------------------------------------------------------------------*/ 03856 #if _USE_FORWARD && _FS_TINY 03857 03858 FRESULT f_forward ( 03859 FIL* fp, /* Pointer to the file object */ 03860 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ 03861 UINT btf, /* Number of bytes to forward */ 03862 UINT* bf /* Pointer to number of bytes forwarded */ 03863 ) 03864 { 03865 FRESULT res; 03866 DWORD remain, clst, sect; 03867 UINT rcnt; 03868 BYTE csect; 03869 03870 03871 *bf = 0; /* Clear transfer byte counter */ 03872 03873 res = validate(fp); /* Check validity of the object */ 03874 if (res != FR_OK) LEAVE_FF(fp->fs, res); 03875 if (fp->err) /* Check error */ 03876 LEAVE_FF(fp->fs, (FRESULT)fp->err); 03877 if (!(fp->flag & FA_READ)) /* Check access mode */ 03878 LEAVE_FF(fp->fs, FR_DENIED); 03879 03880 remain = fp->fsize - fp->fptr; 03881 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */ 03882 03883 for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */ 03884 fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) { 03885 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */ 03886 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ 03887 if (!csect) { /* On the cluster boundary? */ 03888 clst = (fp->fptr == 0) ? /* On the top of the file? */ 03889 fp->sclust : get_fat(fp->fs, fp->clust); 03890 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR); 03891 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR); 03892 fp->clust = clst; /* Update current cluster */ 03893 } 03894 } 03895 sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */ 03896 if (!sect) ABORT(fp->fs, FR_INT_ERR); 03897 sect += csect; 03898 if (move_window(fp->fs, sect)) /* Move sector window */ 03899 ABORT(fp->fs, FR_DISK_ERR); 03900 fp->dsect = sect; 03901 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */ 03902 if (rcnt > btf) rcnt = btf; 03903 rcnt = (*func)(&fp->fs->win.d8[(WORD)fp->fptr % SS(fp->fs)], rcnt); 03904 if (!rcnt) ABORT(fp->fs, FR_INT_ERR); 03905 } 03906 03907 LEAVE_FF(fp->fs, FR_OK); 03908 } 03909 #endif /* _USE_FORWARD */ 03910 03911 03912 03913 #if _USE_MKFS && !_FS_READONLY 03914 /*-----------------------------------------------------------------------*/ 03915 /* Create File System on the Drive */ 03916 /*-----------------------------------------------------------------------*/ 03917 #define N_ROOTDIR 512 /* Number of root directory entries for FAT12/16 */ 03918 #define N_FATS 1 /* Number of FAT copies (1 or 2) */ 03919 03920 03921 FRESULT f_mkfs ( 03922 const TCHAR* path, /* Logical drive number */ 03923 BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */ 03924 UINT au /* Allocation unit [bytes] */ 03925 ) 03926 { 03927 static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0}; 03928 static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512}; 03929 int vol; 03930 BYTE fmt, md, sys, *tbl, pdrv, part; 03931 DWORD n_clst, vs, n, wsect; 03932 UINT i; 03933 DWORD b_vol, b_fat, b_dir, b_data; /* LBA */ 03934 DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */ 03935 FATFS *fs; 03936 DSTATUS stat; 03937 03938 03939 /* Check mounted drive and clear work area */ 03940 vol = get_ldnumber(&path); 03941 if (vol < 0) return FR_INVALID_DRIVE; 03942 if (sfd > 1) return FR_INVALID_PARAMETER; 03943 if (au & (au - 1)) return FR_INVALID_PARAMETER; 03944 fs = FatFs[vol]; 03945 if (!fs) return FR_NOT_ENABLED; 03946 fs->fs_type = 0; 03947 pdrv = LD2PD(vol); /* Physical drive */ 03948 part = LD2PT(vol); /* Partition (0:auto detect, 1-4:get from partition table)*/ 03949 03950 /* Get disk statics */ 03951 stat = disk_initialize(pdrv); 03952 if (stat & STA_NOINIT) return FR_NOT_READY; 03953 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 03954 #if _MAX_SS != 512 /* Get disk sector size */ 03955 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS) 03956 return FR_DISK_ERR; 03957 #endif 03958 if (_MULTI_PARTITION && part) { 03959 /* Get partition information from partition table in the MBR */ 03960 if (disk_read(pdrv, fs->win.d8, 0, 1)) return FR_DISK_ERR; 03961 if (LD_WORD(fs->win.d8+BS_55AA) != 0xAA55) return FR_MKFS_ABORTED; 03962 tbl = &fs->win.d8[MBR_Table + (part - 1) * SZ_PTE]; 03963 if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */ 03964 b_vol = LD_DWORD(tbl+8); /* Volume start sector */ 03965 n_vol = LD_DWORD(tbl+12); /* Volume size */ 03966 } else { 03967 /* Create a partition in this function */ 03968 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128) 03969 return FR_DISK_ERR; 03970 b_vol = (sfd) ? 0 : 63; /* Volume start sector */ 03971 n_vol -= b_vol; /* Volume size */ 03972 } 03973 03974 if (!au) { /* AU auto selection */ 03975 vs = n_vol / (2000 / (SS(fs) / 512)); 03976 for (i = 0; vs < vst[i]; i++) ; 03977 au = cst[i]; 03978 } 03979 au /= SS(fs); /* Number of sectors per cluster */ 03980 if (au == 0) au = 1; 03981 if (au > 128) au = 128; 03982 03983 /* Pre-compute number of clusters and FAT sub-type */ 03984 n_clst = n_vol / au; 03985 fmt = FS_FAT12; 03986 if (n_clst >= MIN_FAT16) fmt = FS_FAT16; 03987 if (n_clst >= MIN_FAT32) fmt = FS_FAT32; 03988 03989 /* Determine offset and size of FAT structure */ 03990 if (fmt == FS_FAT32) { 03991 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs); 03992 n_rsv = 32; 03993 n_dir = 0; 03994 } else { 03995 n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4; 03996 n_fat = (n_fat + SS(fs) - 1) / SS(fs); 03997 n_rsv = 1; 03998 n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs); 03999 } 04000 b_fat = b_vol + n_rsv; /* FAT area start sector */ 04001 b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */ 04002 b_data = b_dir + n_dir; /* Data area start sector */ 04003 if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */ 04004 04005 /* Align data start sector to erase block boundary (for flash memory media) */ 04006 if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1; 04007 n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */ 04008 n = (n - b_data) / N_FATS; 04009 if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */ 04010 n_rsv += n; 04011 b_fat += n; 04012 } else { /* FAT12/16: Expand FAT size */ 04013 n_fat += n; 04014 } 04015 04016 /* Determine number of clusters and final check of validity of the FAT sub-type */ 04017 n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au; 04018 if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16) 04019 || (fmt == FS_FAT32 && n_clst < MIN_FAT32)) 04020 return FR_MKFS_ABORTED; 04021 04022 /* Determine system ID in the partition table */ 04023 if (fmt == FS_FAT32) { 04024 sys = 0x0C; /* FAT32X */ 04025 } else { 04026 if (fmt == FS_FAT12 && n_vol < 0x10000) { 04027 sys = 0x01; /* FAT12(<65536) */ 04028 } else { 04029 sys = (n_vol < 0x10000) ? 0x04 : 0x06; /* FAT16(<65536) : FAT12/16(>=65536) */ 04030 } 04031 } 04032 04033 if (_MULTI_PARTITION && part) { 04034 /* Update system ID in the partition table */ 04035 tbl = &fs->win.d8[MBR_Table + (part - 1) * SZ_PTE]; 04036 tbl[4] = sys; 04037 if (disk_write(pdrv, fs->win.d8, 0, 1)) /* Write it to teh MBR */ 04038 return FR_DISK_ERR; 04039 md = 0xF8; 04040 } else { 04041 if (sfd) { /* No partition table (SFD) */ 04042 md = 0xF0; 04043 } else { /* Create partition table (FDISK) */ 04044 mem_set(fs->win.d8, 0, SS(fs)); 04045 tbl = fs->win.d8+MBR_Table; /* Create partition table for single partition in the drive */ 04046 tbl[1] = 1; /* Partition start head */ 04047 tbl[2] = 1; /* Partition start sector */ 04048 tbl[3] = 0; /* Partition start cylinder */ 04049 tbl[4] = sys; /* System type */ 04050 tbl[5] = 254; /* Partition end head */ 04051 n = (b_vol + n_vol) / 63 / 255; 04052 tbl[6] = (BYTE)(n >> 2 | 63); /* Partition end sector */ 04053 tbl[7] = (BYTE)n; /* End cylinder */ 04054 ST_DWORD(tbl+8, 63); /* Partition start in LBA */ 04055 ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */ 04056 ST_WORD(fs->win.d8+BS_55AA, 0xAA55); /* MBR signature */ 04057 if (disk_write(pdrv, fs->win.d8, 0, 1)) /* Write it to the MBR */ 04058 return FR_DISK_ERR; 04059 md = 0xF8; 04060 } 04061 } 04062 04063 /* Create BPB in the VBR */ 04064 tbl = fs->win.d8; /* Clear sector */ 04065 mem_set(tbl, 0, SS(fs)); 04066 mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */ 04067 i = SS(fs); /* Sector size */ 04068 ST_WORD(tbl+BPB_BytsPerSec, i); 04069 tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */ 04070 ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */ 04071 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */ 04072 i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of root directory entries */ 04073 ST_WORD(tbl+BPB_RootEntCnt, i); 04074 if (n_vol < 0x10000) { /* Number of total sectors */ 04075 ST_WORD(tbl+BPB_TotSec16, n_vol); 04076 } else { 04077 ST_DWORD(tbl+BPB_TotSec32, n_vol); 04078 } 04079 tbl[BPB_Media] = md; /* Media descriptor */ 04080 ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */ 04081 ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */ 04082 ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */ 04083 n = get_fattime(); /* Use current time as VSN */ 04084 if (fmt == FS_FAT32) { 04085 ST_DWORD(tbl+BS_VolID32, n); /* VSN */ 04086 ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */ 04087 ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */ 04088 ST_WORD(tbl+BPB_FSInfo, 1); /* FSINFO record offset (VBR+1) */ 04089 ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */ 04090 tbl[BS_DrvNum32] = 0x80; /* Drive number */ 04091 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */ 04092 mem_cpy(tbl+BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ 04093 } else { 04094 ST_DWORD(tbl+BS_VolID, n); /* VSN */ 04095 ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */ 04096 tbl[BS_DrvNum] = 0x80; /* Drive number */ 04097 tbl[BS_BootSig] = 0x29; /* Extended boot signature */ 04098 mem_cpy(tbl+BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ 04099 } 04100 ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */ 04101 if (disk_write(pdrv, tbl, b_vol, 1)) /* Write it to the VBR sector */ 04102 return FR_DISK_ERR; 04103 if (fmt == FS_FAT32) /* Write backup VBR if needed (VBR+6) */ 04104 disk_write(pdrv, tbl, b_vol + 6, 1); 04105 04106 /* Initialize FAT area */ 04107 wsect = b_fat; 04108 for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */ 04109 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */ 04110 n = md; /* Media descriptor byte */ 04111 if (fmt != FS_FAT32) { 04112 n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00; 04113 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */ 04114 } else { 04115 n |= 0xFFFFFF00; 04116 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */ 04117 ST_DWORD(tbl+4, 0xFFFFFFFF); 04118 ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root directory */ 04119 } 04120 if (disk_write(pdrv, tbl, wsect++, 1)) 04121 return FR_DISK_ERR; 04122 mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */ 04123 for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */ 04124 if (disk_write(pdrv, tbl, wsect++, 1)) 04125 return FR_DISK_ERR; 04126 } 04127 } 04128 04129 /* Initialize root directory */ 04130 i = (fmt == FS_FAT32) ? au : n_dir; 04131 do { 04132 if (disk_write(pdrv, tbl, wsect++, 1)) 04133 return FR_DISK_ERR; 04134 } while (--i); 04135 04136 #if _USE_ERASE /* Erase data area if needed */ 04137 { 04138 DWORD eb[2]; 04139 04140 eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1; 04141 disk_ioctl(pdrv, CTRL_ERASE_SECTOR, eb); 04142 } 04143 #endif 04144 04145 /* Create FSINFO if needed */ 04146 if (fmt == FS_FAT32) { 04147 ST_DWORD(tbl+FSI_LeadSig, 0x41615252); 04148 ST_DWORD(tbl+FSI_StrucSig, 0x61417272); 04149 ST_DWORD(tbl+FSI_Free_Count, n_clst - 1); /* Number of free clusters */ 04150 ST_DWORD(tbl+FSI_Nxt_Free, 2); /* Last allocated cluster# */ 04151 ST_WORD(tbl+BS_55AA, 0xAA55); 04152 disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR+1) */ 04153 disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR+7) */ 04154 } 04155 04156 return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR; 04157 } 04158 04159 04160 04161 #if _MULTI_PARTITION 04162 /*-----------------------------------------------------------------------*/ 04163 /* Divide Physical Drive */ 04164 /*-----------------------------------------------------------------------*/ 04165 04166 FRESULT f_fdisk ( 04167 BYTE pdrv, /* Physical drive number */ 04168 const DWORD szt[], /* Pointer to the size table for each partitions */ 04169 void* work /* Pointer to the working buffer */ 04170 ) 04171 { 04172 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl; 04173 BYTE s_hd, e_hd, *p, *buf = (BYTE*)work; 04174 DSTATUS stat; 04175 DWORD sz_disk, sz_part, s_part; 04176 04177 04178 stat = disk_initialize(pdrv); 04179 if (stat & STA_NOINIT) return FR_NOT_READY; 04180 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 04181 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR; 04182 04183 /* Determine CHS in the table regardless of the drive geometry */ 04184 for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ; 04185 if (n == 256) n--; 04186 e_hd = n - 1; 04187 sz_cyl = 63 * n; 04188 tot_cyl = sz_disk / sz_cyl; 04189 04190 /* Create partition table */ 04191 mem_set(buf, 0, _MAX_SS); 04192 p = buf + MBR_Table; b_cyl = 0; 04193 for (i = 0; i < 4; i++, p += SZ_PTE) { 04194 p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl; 04195 if (!p_cyl) continue; 04196 s_part = (DWORD)sz_cyl * b_cyl; 04197 sz_part = (DWORD)sz_cyl * p_cyl; 04198 if (i == 0) { /* Exclude first track of cylinder 0 */ 04199 s_hd = 1; 04200 s_part += 63; sz_part -= 63; 04201 } else { 04202 s_hd = 0; 04203 } 04204 e_cyl = b_cyl + p_cyl - 1; 04205 if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER; 04206 04207 /* Set partition table */ 04208 p[1] = s_hd; /* Start head */ 04209 p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */ 04210 p[3] = (BYTE)b_cyl; /* Start cylinder */ 04211 p[4] = 0x06; /* System type (temporary setting) */ 04212 p[5] = e_hd; /* End head */ 04213 p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */ 04214 p[7] = (BYTE)e_cyl; /* End cylinder */ 04215 ST_DWORD(p + 8, s_part); /* Start sector in LBA */ 04216 ST_DWORD(p + 12, sz_part); /* Partition size */ 04217 04218 /* Next partition */ 04219 b_cyl += p_cyl; 04220 } 04221 ST_WORD(p, 0xAA55); 04222 04223 /* Write it to the MBR */ 04224 return (disk_write(pdrv, buf, 0, 1) || disk_ioctl(pdrv, CTRL_SYNC, 0)) ? FR_DISK_ERR : FR_OK; 04225 } 04226 04227 04228 #endif /* _MULTI_PARTITION */ 04229 #endif /* _USE_MKFS && !_FS_READONLY */ 04230 04231 04232 04233 04234 #if _USE_STRFUNC 04235 /*-----------------------------------------------------------------------*/ 04236 /* Get a string from the file */ 04237 /*-----------------------------------------------------------------------*/ 04238 04239 TCHAR* f_gets ( 04240 TCHAR* buff, /* Pointer to the string buffer to read */ 04241 int len, /* Size of string buffer (characters) */ 04242 FIL* fp /* Pointer to the file object */ 04243 ) 04244 { 04245 int n = 0; 04246 TCHAR c, *p = buff; 04247 BYTE s[2]; 04248 UINT rc; 04249 04250 04251 while (n < len - 1) { /* Read characters until buffer gets filled */ 04252 #if _LFN_UNICODE 04253 #if _STRF_ENCODE == 3 /* Read a character in UTF-8 */ 04254 f_read(fp, s, 1, &rc); 04255 if (rc != 1) break; 04256 c = s[0]; 04257 if (c >= 0x80) { 04258 if (c < 0xC0) continue; /* Skip stray trailer */ 04259 if (c < 0xE0) { /* Two-byte sequence */ 04260 f_read(fp, s, 1, &rc); 04261 if (rc != 1) break; 04262 c = (c & 0x1F) << 6 | (s[0] & 0x3F); 04263 if (c < 0x80) c = '?'; 04264 } else { 04265 if (c < 0xF0) { /* Three-byte sequence */ 04266 f_read(fp, s, 2, &rc); 04267 if (rc != 2) break; 04268 c = c << 12 | (s[0] & 0x3F) << 6 | (s[1] & 0x3F); 04269 if (c < 0x800) c = '?'; 04270 } else { /* Reject four-byte sequence */ 04271 c = '?'; 04272 } 04273 } 04274 } 04275 #elif _STRF_ENCODE == 2 /* Read a character in UTF-16BE */ 04276 f_read(fp, s, 2, &rc); 04277 if (rc != 2) break; 04278 c = s[1] + (s[0] << 8); 04279 #elif _STRF_ENCODE == 1 /* Read a character in UTF-16LE */ 04280 f_read(fp, s, 2, &rc); 04281 if (rc != 2) break; 04282 c = s[0] + (s[1] << 8); 04283 #else /* Read a character in ANSI/OEM */ 04284 f_read(fp, s, 1, &rc); 04285 if (rc != 1) break; 04286 c = s[0]; 04287 if (IsDBCS1(c)) { 04288 f_read(fp, s, 1, &rc); 04289 if (rc != 1) break; 04290 c = (c << 8) + s[0]; 04291 } 04292 c = ff_convert(c, 1); /* OEM -> Unicode */ 04293 if (!c) c = '?'; 04294 #endif 04295 #else /* Read a character without conversion */ 04296 f_read(fp, s, 1, &rc); 04297 if (rc != 1) break; 04298 c = s[0]; 04299 #endif 04300 if (_USE_STRFUNC == 2 && c == '\r') continue; /* Strip '\r' */ 04301 *p++ = c; 04302 n++; 04303 if (c == '\n') break; /* Break on EOL */ 04304 } 04305 *p = 0; 04306 return n ? buff : 0; /* When no data read (eof or error), return with error. */ 04307 } 04308 04309 04310 04311 #if !_FS_READONLY 04312 #include <stdarg.h> 04313 /*-----------------------------------------------------------------------*/ 04314 /* Put a character to the file */ 04315 /*-----------------------------------------------------------------------*/ 04316 04317 typedef struct { 04318 FIL* fp; 04319 int idx, nchr; 04320 BYTE buf[64]; 04321 } putbuff; 04322 04323 04324 static 04325 void putc_bfd ( 04326 putbuff* pb, 04327 TCHAR c 04328 ) 04329 { 04330 UINT bw; 04331 int i; 04332 04333 04334 if (_USE_STRFUNC == 2 && c == '\n') /* LF -> CRLF conversion */ 04335 putc_bfd(pb, '\r'); 04336 04337 i = pb->idx; /* Buffer write index (-1:error) */ 04338 if (i < 0) return; 04339 04340 #if _LFN_UNICODE 04341 #if _STRF_ENCODE == 3 /* Write a character in UTF-8 */ 04342 if (c < 0x80) { /* 7-bit */ 04343 pb->buf[i++] = (BYTE)c; 04344 } else { 04345 if (c < 0x800) { /* 11-bit */ 04346 pb->buf[i++] = (BYTE)(0xC0 | c >> 6); 04347 } else { /* 16-bit */ 04348 pb->buf[i++] = (BYTE)(0xE0 | c >> 12); 04349 pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F)); 04350 } 04351 pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F)); 04352 } 04353 #elif _STRF_ENCODE == 2 /* Write a character in UTF-16BE */ 04354 pb->buf[i++] = (BYTE)(c >> 8); 04355 pb->buf[i++] = (BYTE)c; 04356 #elif _STRF_ENCODE == 1 /* Write a character in UTF-16LE */ 04357 pb->buf[i++] = (BYTE)c; 04358 pb->buf[i++] = (BYTE)(c >> 8); 04359 #else /* Write a character in ANSI/OEM */ 04360 c = ff_convert(c, 0); /* Unicode -> OEM */ 04361 if (!c) c = '?'; 04362 if (c >= 0x100) 04363 pb->buf[i++] = (BYTE)(c >> 8); 04364 pb->buf[i++] = (BYTE)c; 04365 #endif 04366 #else /* Write a character without conversion */ 04367 pb->buf[i++] = (BYTE)c; 04368 #endif 04369 04370 if (i >= (int)(sizeof pb->buf) - 3) { /* Write buffered characters to the file */ 04371 f_write(pb->fp, pb->buf, (UINT)i, &bw); 04372 i = (bw == (UINT)i) ? 0 : -1; 04373 } 04374 pb->idx = i; 04375 pb->nchr++; 04376 } 04377 04378 04379 04380 int f_putc ( 04381 TCHAR c, /* A character to be output */ 04382 FIL* fp /* Pointer to the file object */ 04383 ) 04384 { 04385 putbuff pb; 04386 UINT nw; 04387 04388 04389 pb.fp = fp; /* Initialize output buffer */ 04390 pb.nchr = pb.idx = 0; 04391 04392 putc_bfd(&pb, c); /* Put a character */ 04393 04394 if ( pb.idx >= 0 /* Flush buffered characters to the file */ 04395 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK 04396 && (UINT)pb.idx == nw) return pb.nchr; 04397 return EOF; 04398 } 04399 04400 04401 04402 04403 /*-----------------------------------------------------------------------*/ 04404 /* Put a string to the file */ 04405 /*-----------------------------------------------------------------------*/ 04406 04407 int f_puts ( 04408 const TCHAR* str, /* Pointer to the string to be output */ 04409 FIL* fp /* Pointer to the file object */ 04410 ) 04411 { 04412 putbuff pb; 04413 UINT nw; 04414 04415 04416 pb.fp = fp; /* Initialize output buffer */ 04417 pb.nchr = pb.idx = 0; 04418 04419 while (*str) /* Put the string */ 04420 putc_bfd(&pb, *str++); 04421 04422 if ( pb.idx >= 0 /* Flush buffered characters to the file */ 04423 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK 04424 && (UINT)pb.idx == nw) return pb.nchr; 04425 return EOF; 04426 } 04427 04428 04429 04430 04431 /*-----------------------------------------------------------------------*/ 04432 /* Put a formatted string to the file */ 04433 /*-----------------------------------------------------------------------*/ 04434 04435 int f_printf ( 04436 FIL* fp, /* Pointer to the file object */ 04437 const TCHAR* fmt, /* Pointer to the format string */ 04438 ... /* Optional arguments... */ 04439 ) 04440 { 04441 va_list arp; 04442 BYTE f, r; 04443 UINT nw, i, j, w; 04444 DWORD v; 04445 TCHAR c, d, s[16], *p; 04446 putbuff pb; 04447 04448 04449 pb.fp = fp; /* Initialize output buffer */ 04450 pb.nchr = pb.idx = 0; 04451 04452 va_start(arp, fmt); 04453 04454 for (;;) { 04455 c = *fmt++; 04456 if (c == 0) break; /* End of string */ 04457 if (c != '%') { /* Non escape character */ 04458 putc_bfd(&pb, c); 04459 continue; 04460 } 04461 w = f = 0; 04462 c = *fmt++; 04463 if (c == '0') { /* Flag: '0' padding */ 04464 f = 1; c = *fmt++; 04465 } else { 04466 if (c == '-') { /* Flag: left justified */ 04467 f = 2; c = *fmt++; 04468 } 04469 } 04470 while (IsDigit(c)) { /* Precision */ 04471 w = w * 10 + c - '0'; 04472 c = *fmt++; 04473 } 04474 if (c == 'l' || c == 'L') { /* Prefix: Size is long int */ 04475 f |= 4; c = *fmt++; 04476 } 04477 if (!c) break; 04478 d = c; 04479 if (IsLower(d)) d -= 0x20; 04480 switch (d) { /* Type is... */ 04481 case 'S' : /* String */ 04482 p = va_arg(arp, TCHAR*); 04483 for (j = 0; p[j]; j++) ; 04484 if (!(f & 2)) { 04485 while (j++ < w) putc_bfd(&pb, ' '); 04486 } 04487 while (*p) putc_bfd(&pb, *p++); 04488 while (j++ < w) putc_bfd(&pb, ' '); 04489 continue; 04490 case 'C' : /* Character */ 04491 putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue; 04492 case 'B' : /* Binary */ 04493 r = 2; break; 04494 case 'O' : /* Octal */ 04495 r = 8; break; 04496 case 'D' : /* Signed decimal */ 04497 case 'U' : /* Unsigned decimal */ 04498 r = 10; break; 04499 case 'X' : /* Hexdecimal */ 04500 r = 16; break; 04501 default: /* Unknown type (pass-through) */ 04502 putc_bfd(&pb, c); continue; 04503 } 04504 04505 /* Get an argument and put it in numeral */ 04506 v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int)); 04507 if (d == 'D' && (v & 0x80000000)) { 04508 v = 0 - v; 04509 f |= 8; 04510 } 04511 i = 0; 04512 do { 04513 d = (TCHAR)(v % r); v /= r; 04514 if (d > 9) d += (c == 'x') ? 0x27 : 0x07; 04515 s[i++] = d + '0'; 04516 } while (v && i < sizeof s / sizeof s[0]); 04517 if (f & 8) s[i++] = '-'; 04518 j = i; d = (f & 1) ? '0' : ' '; 04519 while (!(f & 2) && j++ < w) putc_bfd(&pb, d); 04520 do putc_bfd(&pb, s[--i]); while (i); 04521 while (j++ < w) putc_bfd(&pb, d); 04522 } 04523 04524 va_end(arp); 04525 04526 if ( pb.idx >= 0 /* Flush buffered characters to the file */ 04527 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK 04528 && (UINT)pb.idx == nw) return pb.nchr; 04529 return EOF; 04530 } 04531 04532 #endif /* !_FS_READONLY */ 04533 #endif /* _USE_STRFUNC */
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