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ff.cpp

00001 /*----------------------------------------------------------------------------/
00002 /  FatFs - FAT file system module  R0.09a                 (C)ChaN, 2012
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) 2012, ChaN, all right reserved.
00009 /
00010 / * The FatFs module is a free software and there is NO WARRANTY.
00011 / * No restriction on use. You can use, modify and redistribute it for
00012 /   personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
00013 / * Redistributions of source code must retain the above copyright notice.
00014 /
00015 /-----------------------------------------------------------------------------/
00016 / Feb 26,'06 R0.00  Prototype.
00017 /
00018 / Apr 29,'06 R0.01  First stable version.
00019 /
00020 / Jun 01,'06 R0.02  Added FAT12 support.
00021 /                   Removed unbuffered mode.
00022 /                   Fixed a problem on small (<32M) partition.
00023 / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
00024 /
00025 / Sep 22,'06 R0.03  Added f_rename().
00026 /                   Changed option _FS_MINIMUM to _FS_MINIMIZE.
00027 / Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast.
00028 /                   Fixed f_mkdir() creates incorrect directory on FAT32.
00029 /
00030 / Feb 04,'07 R0.04  Supported multiple drive system.
00031 /                   Changed some interfaces for multiple drive system.
00032 /                   Changed f_mountdrv() to f_mount().
00033 /                   Added f_mkfs().
00034 / Apr 01,'07 R0.04a Supported multiple partitions on a physical drive.
00035 /                   Added a capability of extending file size to f_lseek().
00036 /                   Added minimization level 3.
00037 /                   Fixed an endian sensitive code in f_mkfs().
00038 / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
00039 /                   Added FSInfo support.
00040 /                   Fixed DBCS name can result FR_INVALID_NAME.
00041 /                   Fixed short seek (<= csize) collapses the file object.
00042 /
00043 / Aug 25,'07 R0.05  Changed arguments of f_read(), f_write() and f_mkfs().
00044 /                   Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
00045 /                   Fixed f_mkdir() on FAT32 creates incorrect directory.
00046 / Feb 03,'08 R0.05a Added f_truncate() and f_utime().
00047 /                   Fixed off by one error at FAT sub-type determination.
00048 /                   Fixed btr in f_read() can be mistruncated.
00049 /                   Fixed cached sector is not flushed when create and close without write.
00050 /
00051 / Apr 01,'08 R0.06  Added fputc(), fputs(), fprintf() and fgets().
00052 /                   Improved performance of f_lseek() on moving to the same or following cluster.
00053 /
00054 / Apr 01,'09 R0.07  Merged Tiny-FatFs as a configuration option. (_FS_TINY)
00055 /                   Added long file name feature.
00056 /                   Added multiple code page feature.
00057 /                   Added re-entrancy for multitask operation.
00058 /                   Added auto cluster size selection to f_mkfs().
00059 /                   Added rewind option to f_readdir().
00060 /                   Changed result code of critical errors.
00061 /                   Renamed string functions to avoid name collision.
00062 / Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
00063 /                   Added multiple sector size feature.
00064 / Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
00065 /                   Fixed wrong cache control in f_lseek().
00066 /                   Added relative path feature.
00067 /                   Added f_chdir() and f_chdrive().
00068 /                   Added proper case conversion to extended char.
00069 / Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
00070 /                   Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
00071 /                   Fixed name matching error on the 13 char boundary.
00072 /                   Added a configuration option, _LFN_UNICODE.
00073 /                   Changed f_readdir() to return the SFN with always upper case on non-LFN cfg.
00074 /
00075 / May 15,'10 R0.08  Added a memory configuration option. (_USE_LFN = 3)
00076 /                   Added file lock feature. (_FS_SHARE)
00077 /                   Added fast seek feature. (_USE_FASTSEEK)
00078 /                   Changed some types on the API, XCHAR->TCHAR.
00079 /                   Changed fname member in the FILINFO structure on Unicode cfg.
00080 /                   String functions support UTF-8 encoding files on Unicode cfg.
00081 / Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2)
00082 /                   Added sector erase feature. (_USE_ERASE)
00083 /                   Moved file lock semaphore table from fs object to the bss.
00084 /                   Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'.
00085 /                   Fixed f_mkfs() creates wrong FAT32 volume.
00086 / Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write().
00087 /                   f_lseek() reports required table size on creating CLMP.
00088 /                   Extended format syntax of f_printf function.
00089 /                   Ignores duplicated directory separators in given path name.
00090 /
00091 / Sep 06,'11 R0.09  f_mkfs() supports multiple partition to finish the multiple partition feature.
00092 /                   Added f_fdisk(). (_MULTI_PARTITION = 2)
00093 / Aug 27,'12 R0.09a Fixed assertion failure due to OS/2 EA on FAT12/16 volume.
00094 /                   Changed f_open() and f_opendir reject null object pointer to avoid crash.
00095 /                   Changed option name _FS_SHARE to _FS_LOCK.
00096 /---------------------------------------------------------------------------*/
00097 
00098 #include "ff.h"         /* FatFs configurations and declarations */
00099 #include "diskio.h"     /* Declarations of low level disk I/O functions */
00100 
00101 
00102 /*--------------------------------------------------------------------------
00103 
00104    Module Private Definitions
00105 
00106 ---------------------------------------------------------------------------*/
00107 
00108 #if _FATFS != 4004  /* Revision ID */
00109 #error Wrong include file (ff.h).
00110 #endif
00111 
00112 
00113 /* Definitions on sector size */
00114 #if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096
00115 #error Wrong sector size.
00116 #endif
00117 #if _MAX_SS != 512
00118 #define SS(fs)  ((fs)->ssize)   /* Variable sector size */
00119 #else
00120 #define SS(fs)  512U            /* Fixed sector size */
00121 #endif
00122 
00123 
00124 /* Reentrancy related */
00125 #if _FS_REENTRANT
00126 #if _USE_LFN == 1
00127 #error Static LFN work area must not be used in re-entrant configuration.
00128 #endif
00129 #define ENTER_FF(fs)        { if (!lock_fs(fs)) return FR_TIMEOUT; }
00130 #define LEAVE_FF(fs, res)   { unlock_fs(fs, res); return res; }
00131 #else
00132 #define ENTER_FF(fs)
00133 #define LEAVE_FF(fs, res)   return res
00134 #endif
00135 
00136 #define ABORT(fs, res)      { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
00137 
00138 
00139 /* File access control feature */
00140 #if _FS_LOCK
00141 #if _FS_READONLY
00142 #error _FS_LOCK must be 0 on read-only cfg.
00143 #endif
00144 typedef struct {
00145     FATFS *fs;              /* File ID 1, volume (NULL:blank entry) */
00146     DWORD clu;              /* File ID 2, directory */
00147     WORD idx;               /* File ID 3, directory index */
00148     WORD ctr;               /* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */
00149 } FILESEM;
00150 #endif
00151 
00152 
00153 
00154 /* DBCS code ranges and SBCS extend char conversion table */
00155 
00156 #if _CODE_PAGE == 932   /* Japanese Shift-JIS */
00157 #define _DF1S   0x81    /* DBC 1st byte range 1 start */
00158 #define _DF1E   0x9F    /* DBC 1st byte range 1 end */
00159 #define _DF2S   0xE0    /* DBC 1st byte range 2 start */
00160 #define _DF2E   0xFC    /* DBC 1st byte range 2 end */
00161 #define _DS1S   0x40    /* DBC 2nd byte range 1 start */
00162 #define _DS1E   0x7E    /* DBC 2nd byte range 1 end */
00163 #define _DS2S   0x80    /* DBC 2nd byte range 2 start */
00164 #define _DS2E   0xFC    /* DBC 2nd byte range 2 end */
00165 
00166 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
00167 #define _DF1S   0x81
00168 #define _DF1E   0xFE
00169 #define _DS1S   0x40
00170 #define _DS1E   0x7E
00171 #define _DS2S   0x80
00172 #define _DS2E   0xFE
00173 
00174 #elif _CODE_PAGE == 949 /* Korean */
00175 #define _DF1S   0x81
00176 #define _DF1E   0xFE
00177 #define _DS1S   0x41
00178 #define _DS1E   0x5A
00179 #define _DS2S   0x61
00180 #define _DS2E   0x7A
00181 #define _DS3S   0x81
00182 #define _DS3E   0xFE
00183 
00184 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
00185 #define _DF1S   0x81
00186 #define _DF1E   0xFE
00187 #define _DS1S   0x40
00188 #define _DS1E   0x7E
00189 #define _DS2S   0xA1
00190 #define _DS2E   0xFE
00191 
00192 #elif _CODE_PAGE == 437 /* U.S. (OEM) */
00193 #define _DF1S   0
00194 #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, \
00195                 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, \
00196                 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, \
00197                 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}
00198 
00199 #elif _CODE_PAGE == 720 /* Arabic (OEM) */
00200 #define _DF1S   0
00201 #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, \
00202                 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, \
00203                 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, \
00204                 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}
00205 
00206 #elif _CODE_PAGE == 737 /* Greek (OEM) */
00207 #define _DF1S   0
00208 #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, \
00209                 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, \
00210                 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, \
00211                 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}
00212 
00213 #elif _CODE_PAGE == 775 /* Baltic (OEM) */
00214 #define _DF1S   0
00215 #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, \
00216                 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, \
00217                 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, \
00218                 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}
00219 
00220 #elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */
00221 #define _DF1S   0
00222 #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, \
00223                 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, \
00224                 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, \
00225                 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}
00226 
00227 #elif _CODE_PAGE == 852 /* Latin 2 (OEM) */
00228 #define _DF1S   0
00229 #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, \
00230                 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, \
00231                 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, \
00232                 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}
00233 
00234 #elif _CODE_PAGE == 855 /* Cyrillic (OEM) */
00235 #define _DF1S   0
00236 #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, \
00237                 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, \
00238                 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, \
00239                 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}
00240 
00241 #elif _CODE_PAGE == 857 /* Turkish (OEM) */
00242 #define _DF1S   0
00243 #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, \
00244                 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, \
00245                 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, \
00246                 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}
00247 
00248 #elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */
00249 #define _DF1S   0
00250 #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, \
00251                 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, \
00252                 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, \
00253                 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}
00254 
00255 #elif _CODE_PAGE == 862 /* Hebrew (OEM) */
00256 #define _DF1S   0
00257 #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, \
00258                 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, \
00259                 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, \
00260                 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}
00261 
00262 #elif _CODE_PAGE == 866 /* Russian (OEM) */
00263 #define _DF1S   0
00264 #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, \
00265                 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, \
00266                 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, \
00267                 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}
00268 
00269 #elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */
00270 #define _DF1S   0
00271 #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, \
00272                 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, \
00273                 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, \
00274                 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}
00275 
00276 #elif _CODE_PAGE == 1250 /* Central Europe (Windows) */
00277 #define _DF1S   0
00278 #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, \
00279                 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, \
00280                 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, \
00281                 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}
00282 
00283 #elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */
00284 #define _DF1S   0
00285 #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, \
00286                 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, \
00287                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00288                 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}
00289 
00290 #elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */
00291 #define _DF1S   0
00292 #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, \
00293                 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, \
00294                 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, \
00295                 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}
00296 
00297 #elif _CODE_PAGE == 1253 /* Greek (Windows) */
00298 #define _DF1S   0
00299 #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, \
00300                 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, \
00301                 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, \
00302                 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}
00303 
00304 #elif _CODE_PAGE == 1254 /* Turkish (Windows) */
00305 #define _DF1S   0
00306 #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, \
00307                 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, \
00308                 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, \
00309                 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}
00310 
00311 #elif _CODE_PAGE == 1255 /* Hebrew (Windows) */
00312 #define _DF1S   0
00313 #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, \
00314                 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, \
00315                 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, \
00316                 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}
00317 
00318 #elif _CODE_PAGE == 1256 /* Arabic (Windows) */
00319 #define _DF1S   0
00320 #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, \
00321                 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, \
00322                 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, \
00323                 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}
00324 
00325 #elif _CODE_PAGE == 1257 /* Baltic (Windows) */
00326 #define _DF1S   0
00327 #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, \
00328                 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, \
00329                 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, \
00330                 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}
00331 
00332 #elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */
00333 #define _DF1S   0
00334 #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, \
00335                 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, \
00336                 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, \
00337                 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}
00338 
00339 #elif _CODE_PAGE == 1   /* ASCII (for only non-LFN cfg) */
00340 #if _USE_LFN
00341 #error Cannot use LFN feature without valid code page.
00342 #endif
00343 #define _DF1S   0
00344 
00345 #else
00346 #error Unknown code page
00347 
00348 #endif
00349 
00350 
00351 /* Character code support macros */
00352 #define IsUpper(c)  (((c)>='A')&&((c)<='Z'))
00353 #define IsLower(c)  (((c)>='a')&&((c)<='z'))
00354 #define IsDigit(c)  (((c)>='0')&&((c)<='9'))
00355 
00356 #if _DF1S       /* Code page is DBCS */
00357 
00358 #ifdef _DF2S    /* Two 1st byte areas */
00359 #define IsDBCS1(c)  (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
00360 #else           /* One 1st byte area */
00361 #define IsDBCS1(c)  ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
00362 #endif
00363 
00364 #ifdef _DS3S    /* Three 2nd byte areas */
00365 #define IsDBCS2(c)  (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
00366 #else           /* Two 2nd byte areas */
00367 #define IsDBCS2(c)  (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
00368 #endif
00369 
00370 #else           /* Code page is SBCS */
00371 
00372 #define IsDBCS1(c)  0
00373 #define IsDBCS2(c)  0
00374 
00375 #endif /* _DF1S */
00376 
00377 
00378 /* Name status flags */
00379 #define NS          11      /* Index of name status byte in fn[] */
00380 #define NS_LOSS     0x01    /* Out of 8.3 format */
00381 #define NS_LFN      0x02    /* Force to create LFN entry */
00382 #define NS_LAST     0x04    /* Last segment */
00383 #define NS_BODY     0x08    /* Lower case flag (body) */
00384 #define NS_EXT      0x10    /* Lower case flag (ext) */
00385 #define NS_DOT      0x20    /* Dot entry */
00386 
00387 
00388 /* FAT sub-type boundaries */
00389 /* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */
00390 #define MIN_FAT16   4086    /* Minimum number of clusters for FAT16 */
00391 #define MIN_FAT32   65526   /* Minimum number of clusters for FAT32 */
00392 
00393 
00394 /* FatFs refers the members in the FAT structures as byte array instead of
00395 / structure member because the structure is not binary compatible between
00396 / different platforms */
00397 
00398 #define BS_jmpBoot          0   /* Jump instruction (3) */
00399 #define BS_OEMName          3   /* OEM name (8) */
00400 #define BPB_BytsPerSec      11  /* Sector size [byte] (2) */
00401 #define BPB_SecPerClus      13  /* Cluster size [sector] (1) */
00402 #define BPB_RsvdSecCnt      14  /* Size of reserved area [sector] (2) */
00403 #define BPB_NumFATs         16  /* Number of FAT copies (1) */
00404 #define BPB_RootEntCnt      17  /* Number of root dir entries for FAT12/16 (2) */
00405 #define BPB_TotSec16        19  /* Volume size [sector] (2) */
00406 #define BPB_Media           21  /* Media descriptor (1) */
00407 #define BPB_FATSz16         22  /* FAT size [sector] (2) */
00408 #define BPB_SecPerTrk       24  /* Track size [sector] (2) */
00409 #define BPB_NumHeads        26  /* Number of heads (2) */
00410 #define BPB_HiddSec         28  /* Number of special hidden sectors (4) */
00411 #define BPB_TotSec32        32  /* Volume size [sector] (4) */
00412 #define BS_DrvNum           36  /* Physical drive number (2) */
00413 #define BS_BootSig          38  /* Extended boot signature (1) */
00414 #define BS_VolID            39  /* Volume serial number (4) */
00415 #define BS_VolLab           43  /* Volume label (8) */
00416 #define BS_FilSysType       54  /* File system type (1) */
00417 #define BPB_FATSz32         36  /* FAT size [sector] (4) */
00418 #define BPB_ExtFlags        40  /* Extended flags (2) */
00419 #define BPB_FSVer           42  /* File system version (2) */
00420 #define BPB_RootClus        44  /* Root dir first cluster (4) */
00421 #define BPB_FSInfo          48  /* Offset of FSInfo sector (2) */
00422 #define BPB_BkBootSec       50  /* Offset of backup boot sector (2) */
00423 #define BS_DrvNum32         64  /* Physical drive number (2) */
00424 #define BS_BootSig32        66  /* Extended boot signature (1) */
00425 #define BS_VolID32          67  /* Volume serial number (4) */
00426 #define BS_VolLab32         71  /* Volume label (8) */
00427 #define BS_FilSysType32     82  /* File system type (1) */
00428 #define FSI_LeadSig         0   /* FSI: Leading signature (4) */
00429 #define FSI_StrucSig        484 /* FSI: Structure signature (4) */
00430 #define FSI_Free_Count      488 /* FSI: Number of free clusters (4) */
00431 #define FSI_Nxt_Free        492 /* FSI: Last allocated cluster (4) */
00432 #define MBR_Table           446 /* MBR: Partition table offset (2) */
00433 #define SZ_PTE              16  /* MBR: Size of a partition table entry */
00434 #define BS_55AA             510 /* Boot sector signature (2) */
00435 
00436 #define DIR_Name            0   /* Short file name (11) */
00437 #define DIR_Attr            11  /* Attribute (1) */
00438 #define DIR_NTres           12  /* NT flag (1) */
00439 #define DIR_CrtTimeTenth    13  /* Created time sub-second (1) */
00440 #define DIR_CrtTime         14  /* Created time (2) */
00441 #define DIR_CrtDate         16  /* Created date (2) */
00442 #define DIR_LstAccDate      18  /* Last accessed date (2) */
00443 #define DIR_FstClusHI       20  /* Higher 16-bit of first cluster (2) */
00444 #define DIR_WrtTime         22  /* Modified time (2) */
00445 #define DIR_WrtDate         24  /* Modified date (2) */
00446 #define DIR_FstClusLO       26  /* Lower 16-bit of first cluster (2) */
00447 #define DIR_FileSize        28  /* File size (4) */
00448 #define LDIR_Ord            0   /* LFN entry order and LLE flag (1) */
00449 #define LDIR_Attr           11  /* LFN attribute (1) */
00450 #define LDIR_Type           12  /* LFN type (1) */
00451 #define LDIR_Chksum         13  /* Sum of corresponding SFN entry */
00452 #define LDIR_FstClusLO      26  /* Filled by zero (0) */
00453 #define SZ_DIR              32      /* Size of a directory entry */
00454 #define LLE                 0x40    /* Last long entry flag in LDIR_Ord */
00455 #define DDE                 0xE5    /* Deleted directory entry mark in DIR_Name[0] */
00456 #define NDDE                0x05    /* Replacement of the character collides with DDE */
00457 
00458 
00459 /*------------------------------------------------------------*/
00460 /* Module private work area                                   */
00461 /*------------------------------------------------------------*/
00462 /* Note that uninitialized variables with static duration are
00463 /  zeroed/nulled at start-up. If not, the compiler or start-up
00464 /  routine is out of ANSI-C standard.
00465 */
00466 
00467 #if _VOLUMES
00468 static
00469 FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */
00470 #else
00471 #error Number of volumes must not be 0.
00472 #endif
00473 
00474 static
00475 WORD Fsid;              /* File system mount ID */
00476 
00477 #if _FS_RPATH
00478 static
00479 BYTE CurrVol;           /* Current drive */
00480 #endif
00481 
00482 #if _FS_LOCK
00483 static
00484 FILESEM Files[_FS_LOCK];    /* File lock semaphores */
00485 #endif
00486 
00487 #if _USE_LFN == 0           /* No LFN feature */
00488 #define DEF_NAMEBUF         BYTE sfn[12]
00489 #define INIT_BUF(dobj)      (dobj).fn = sfn
00490 #define FREE_BUF()
00491 
00492 #elif _USE_LFN == 1         /* LFN feature with static working buffer */
00493 static WCHAR LfnBuf[_MAX_LFN+1];
00494 #define DEF_NAMEBUF         BYTE sfn[12]
00495 #define INIT_BUF(dobj)      { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
00496 #define FREE_BUF()
00497 
00498 #elif _USE_LFN == 2         /* LFN feature with dynamic working buffer on the stack */
00499 #define DEF_NAMEBUF         BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1]
00500 #define INIT_BUF(dobj)      { (dobj).fn = sfn; (dobj).lfn = lbuf; }
00501 #define FREE_BUF()
00502 
00503 #elif _USE_LFN == 3         /* LFN feature with dynamic working buffer on the heap */
00504 #define DEF_NAMEBUF         BYTE sfn[12]; WCHAR *lfn
00505 #define INIT_BUF(dobj)      { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \
00506                               if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \
00507                               (dobj).lfn = lfn; (dobj).fn = sfn; }
00508 #define FREE_BUF()          ff_memfree(lfn)
00509 
00510 #else
00511 #error Wrong LFN configuration.
00512 #endif
00513 
00514 
00515 
00516 
00517 /*--------------------------------------------------------------------------
00518 
00519    Module Private Functions
00520 
00521 ---------------------------------------------------------------------------*/
00522 
00523 
00524 /*-----------------------------------------------------------------------*/
00525 /* String functions                                                      */
00526 /*-----------------------------------------------------------------------*/
00527 
00528 /* Copy memory to memory */
00529 static
00530 void mem_cpy (void* dst, const void* src, UINT cnt) {
00531     BYTE *d = (BYTE*)dst;
00532     const BYTE *s = (const BYTE*)src;
00533 
00534 #if _WORD_ACCESS == 1
00535     while (cnt >= sizeof (int)) {
00536         *(int*)d = *(int*)s;
00537         d += sizeof (int); s += sizeof (int);
00538         cnt -= sizeof (int);
00539     }
00540 #endif
00541     while (cnt--)
00542         *d++ = *s++;
00543 }
00544 
00545 /* Fill memory */
00546 static
00547 void mem_set (void* dst, int val, UINT cnt) {
00548     BYTE *d = (BYTE*)dst;
00549 
00550     while (cnt--)
00551         *d++ = (BYTE)val;
00552 }
00553 
00554 /* Compare memory to memory */
00555 static
00556 int mem_cmp (const void* dst, const void* src, UINT cnt) {
00557     const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
00558     int r = 0;
00559 
00560     while (cnt-- && (r = *d++ - *s++) == 0) ;
00561     return r;
00562 }
00563 
00564 /* Check if chr is contained in the string */
00565 static
00566 int chk_chr (const char* str, int chr) {
00567     while (*str && *str != chr) str++;
00568     return *str;
00569 }
00570 
00571 
00572 
00573 /*-----------------------------------------------------------------------*/
00574 /* Request/Release grant to access the volume                            */
00575 /*-----------------------------------------------------------------------*/
00576 #if _FS_REENTRANT
00577 
00578 static
00579 int lock_fs (
00580     FATFS *fs       /* File system object */
00581 )
00582 {
00583     return ff_req_grant(fs->sobj);
00584 }
00585 
00586 
00587 static
00588 void unlock_fs (
00589     FATFS *fs,      /* File system object */
00590     FRESULT res     /* Result code to be returned */
00591 )
00592 {
00593     if (fs &&
00594         res != FR_NOT_ENABLED &&
00595         res != FR_INVALID_DRIVE &&
00596         res != FR_INVALID_OBJECT &&
00597         res != FR_TIMEOUT) {
00598         ff_rel_grant(fs->sobj);
00599     }
00600 }
00601 #endif
00602 
00603 
00604 
00605 /*-----------------------------------------------------------------------*/
00606 /* File lock control functions                                           */
00607 /*-----------------------------------------------------------------------*/
00608 #if _FS_LOCK
00609 
00610 static
00611 FRESULT chk_lock (  /* Check if the file can be accessed */
00612     DIR* dj,        /* Directory object pointing the file to be checked */
00613     int acc         /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
00614 )
00615 {
00616     UINT i, be;
00617 
00618     /* Search file semaphore table */
00619     for (i = be = 0; i < _FS_LOCK; i++) {
00620         if (Files[i].fs) {  /* Existing entry */
00621             if (Files[i].fs == dj->fs &&        /* Check if the file matched with an open file */
00622                 Files[i].clu == dj->sclust &&
00623                 Files[i].idx == dj->index) break;
00624         } else {            /* Blank entry */
00625             be++;
00626         }
00627     }
00628     if (i == _FS_LOCK)  /* The file is not opened */
00629         return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES;   /* Is there a blank entry for new file? */
00630 
00631     /* The file has been opened. Reject any open against writing file and all write mode open */
00632     return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
00633 }
00634 
00635 
00636 static
00637 int enq_lock (void) /* Check if an entry is available for a new file */
00638 {
00639     UINT i;
00640 
00641     for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
00642     return (i == _FS_LOCK) ? 0 : 1;
00643 }
00644 
00645 
00646 static
00647 UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */
00648     DIR* dj,    /* Directory object pointing the file to register or increment */
00649     int acc     /* Desired access mode (0:Read, !0:Write) */
00650 )
00651 {
00652     UINT i;
00653 
00654 
00655     for (i = 0; i < _FS_LOCK; i++) {    /* Find the file */
00656         if (Files[i].fs == dj->fs &&
00657             Files[i].clu == dj->sclust &&
00658             Files[i].idx == dj->index) break;
00659     }
00660 
00661     if (i == _FS_LOCK) {                /* Not opened. Register it as new. */
00662         for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
00663         if (i == _FS_LOCK) return 0;    /* No space to register (int err) */
00664         Files[i].fs = dj->fs;
00665         Files[i].clu = dj->sclust;
00666         Files[i].idx = dj->index;
00667         Files[i].ctr = 0;
00668     }
00669 
00670     if (acc && Files[i].ctr) return 0;  /* Access violation (int err) */
00671 
00672     Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1;  /* Set semaphore value */
00673 
00674     return i + 1;
00675 }
00676 
00677 
00678 static
00679 FRESULT dec_lock (  /* Decrement file open counter */
00680     UINT i          /* Semaphore index */
00681 )
00682 {
00683     WORD n;
00684     FRESULT res;
00685 
00686 
00687     if (--i < _FS_LOCK) {
00688         n = Files[i].ctr;
00689         if (n == 0x100) n = 0;
00690         if (n) n--;
00691         Files[i].ctr = n;
00692         if (!n) Files[i].fs = 0;
00693         res = FR_OK;
00694     } else {
00695         res = FR_INT_ERR;
00696     }
00697     return res;
00698 }
00699 
00700 
00701 static
00702 void clear_lock (   /* Clear lock entries of the volume */
00703     FATFS *fs
00704 )
00705 {
00706     UINT i;
00707 
00708     for (i = 0; i < _FS_LOCK; i++) {
00709         if (Files[i].fs == fs) Files[i].fs = 0;
00710     }
00711 }
00712 #endif
00713 
00714 
00715 
00716 /*-----------------------------------------------------------------------*/
00717 /* Change window offset                                                  */
00718 /*-----------------------------------------------------------------------*/
00719 
00720 static
00721 FRESULT move_window (
00722     FATFS *fs,      /* File system object */
00723     DWORD sector    /* Sector number to make appearance in the fs->win[] */
00724 )                   /* Move to zero only writes back dirty window */
00725 {
00726     DWORD wsect;
00727 
00728 
00729     wsect = fs->winsect;
00730     if (wsect != sector) {  /* Changed current window */
00731 #if !_FS_READONLY
00732         if (fs->wflag) {    /* Write back dirty window if needed */
00733             if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK)
00734                 return FR_DISK_ERR;
00735             fs->wflag = 0;
00736             if (wsect < (fs->fatbase + fs->fsize)) {    /* In FAT area */
00737                 BYTE nf;
00738                 for (nf = fs->n_fats; nf > 1; nf--) {   /* Reflect the change to all FAT copies */
00739                     wsect += fs->fsize;
00740                     disk_write(fs->drv, fs->win, wsect, 1);
00741                 }
00742             }
00743         }
00744 #endif
00745         if (sector) {
00746             if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK)
00747                 return FR_DISK_ERR;
00748             fs->winsect = sector;
00749         }
00750     }
00751 
00752     return FR_OK;
00753 }
00754 
00755 
00756 
00757 
00758 /*-----------------------------------------------------------------------*/
00759 /* Clean-up cached data                                                  */
00760 /*-----------------------------------------------------------------------*/
00761 #if !_FS_READONLY
00762 static
00763 FRESULT sync (  /* FR_OK: successful, FR_DISK_ERR: failed */
00764     FATFS *fs   /* File system object */
00765 )
00766 {
00767     FRESULT res;
00768 
00769 
00770     res = move_window(fs, 0);
00771     if (res == FR_OK) {
00772         /* Update FSInfo sector if needed */
00773         if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
00774             fs->winsect = 0;
00775             /* Create FSInfo structure */
00776             mem_set(fs->win, 0, 512);
00777             ST_WORD(fs->win+BS_55AA, 0xAA55);
00778             ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
00779             ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
00780             ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
00781             ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
00782             /* Write it into the FSInfo sector */
00783             disk_write(fs->drv, fs->win, fs->fsi_sector, 1);
00784             fs->fsi_flag = 0;
00785         }
00786         /* Make sure that no pending write process in the physical drive */
00787         if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
00788             res = FR_DISK_ERR;
00789     }
00790 
00791     return res;
00792 }
00793 #endif
00794 
00795 
00796 
00797 
00798 /*-----------------------------------------------------------------------*/
00799 /* Get sector# from cluster#                                             */
00800 /*-----------------------------------------------------------------------*/
00801 
00802 
00803 DWORD clust2sect (  /* !=0: Sector number, 0: Failed - invalid cluster# */
00804     FATFS *fs,      /* File system object */
00805     DWORD clst      /* Cluster# to be converted */
00806 )
00807 {
00808     clst -= 2;
00809     if (clst >= (fs->n_fatent - 2)) return 0;       /* Invalid cluster# */
00810     return clst * fs->csize + fs->database;
00811 }
00812 
00813 
00814 
00815 
00816 /*-----------------------------------------------------------------------*/
00817 /* FAT access - Read value of a FAT entry                                */
00818 /*-----------------------------------------------------------------------*/
00819 
00820 
00821 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */
00822     FATFS *fs,  /* File system object */
00823     DWORD clst  /* Cluster# to get the link information */
00824 )
00825 {
00826     UINT wc, bc;
00827     BYTE *p;
00828 
00829 
00830     if (clst < 2 || clst >= fs->n_fatent)   /* Check range */
00831         return 1;
00832 
00833     switch (fs->fs_type) {
00834     case FS_FAT12 :
00835         bc = (UINT)clst; bc += bc / 2;
00836         if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
00837         wc = fs->win[bc % SS(fs)]; bc++;
00838         if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
00839         wc |= fs->win[bc % SS(fs)] << 8;
00840         return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
00841 
00842     case FS_FAT16 :
00843         if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break;
00844         p = &fs->win[clst * 2 % SS(fs)];
00845         return LD_WORD(p);
00846 
00847     case FS_FAT32 :
00848         if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break;
00849         p = &fs->win[clst * 4 % SS(fs)];
00850         return LD_DWORD(p) & 0x0FFFFFFF;
00851     }
00852 
00853     return 0xFFFFFFFF;  /* An error occurred at the disk I/O layer */
00854 }
00855 
00856 
00857 
00858 
00859 /*-----------------------------------------------------------------------*/
00860 /* FAT access - Change value of a FAT entry                              */
00861 /*-----------------------------------------------------------------------*/
00862 #if !_FS_READONLY
00863 
00864 FRESULT put_fat (
00865     FATFS *fs,  /* File system object */
00866     DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */
00867     DWORD val   /* New value to mark the cluster */
00868 )
00869 {
00870     UINT bc;
00871     BYTE *p;
00872     FRESULT res;
00873 
00874 
00875     if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
00876         res = FR_INT_ERR;
00877 
00878     } else {
00879         switch (fs->fs_type) {
00880         case FS_FAT12 :
00881             bc = (UINT)clst; bc += bc / 2;
00882             res = move_window(fs, fs->fatbase + (bc / SS(fs)));
00883             if (res != FR_OK) break;
00884             p = &fs->win[bc % SS(fs)];
00885             *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
00886             bc++;
00887             fs->wflag = 1;
00888             res = move_window(fs, fs->fatbase + (bc / SS(fs)));
00889             if (res != FR_OK) break;
00890             p = &fs->win[bc % SS(fs)];
00891             *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
00892             break;
00893 
00894         case FS_FAT16 :
00895             res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
00896             if (res != FR_OK) break;
00897             p = &fs->win[clst * 2 % SS(fs)];
00898             ST_WORD(p, (WORD)val);
00899             break;
00900 
00901         case FS_FAT32 :
00902             res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
00903             if (res != FR_OK) break;
00904             p = &fs->win[clst * 4 % SS(fs)];
00905             val |= LD_DWORD(p) & 0xF0000000;
00906             ST_DWORD(p, val);
00907             break;
00908 
00909         default :
00910             res = FR_INT_ERR;
00911         }
00912         fs->wflag = 1;
00913     }
00914 
00915     return res;
00916 }
00917 #endif /* !_FS_READONLY */
00918 
00919 
00920 
00921 
00922 /*-----------------------------------------------------------------------*/
00923 /* FAT handling - Remove a cluster chain                                 */
00924 /*-----------------------------------------------------------------------*/
00925 #if !_FS_READONLY
00926 static
00927 FRESULT remove_chain (
00928     FATFS *fs,          /* File system object */
00929     DWORD clst          /* Cluster# to remove a chain from */
00930 )
00931 {
00932     FRESULT res;
00933     DWORD nxt;
00934 #if _USE_ERASE
00935     DWORD scl = clst, ecl = clst, rt[2];
00936 #endif
00937 
00938     if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
00939         res = FR_INT_ERR;
00940 
00941     } else {
00942         res = FR_OK;
00943         while (clst < fs->n_fatent) {           /* Not a last link? */
00944             nxt = get_fat(fs, clst);            /* Get cluster status */
00945             if (nxt == 0) break;                /* Empty cluster? */
00946             if (nxt == 1) { res = FR_INT_ERR; break; }  /* Internal error? */
00947             if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }    /* Disk error? */
00948             res = put_fat(fs, clst, 0);         /* Mark the cluster "empty" */
00949             if (res != FR_OK) break;
00950             if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */
00951                 fs->free_clust++;
00952                 fs->fsi_flag = 1;
00953             }
00954 #if _USE_ERASE
00955             if (ecl + 1 == nxt) {   /* Is next cluster contiguous? */
00956                 ecl = nxt;
00957             } else {                /* End of contiguous clusters */
00958                 rt[0] = clust2sect(fs, scl);                    /* Start sector */
00959                 rt[1] = clust2sect(fs, ecl) + fs->csize - 1;    /* End sector */
00960                 disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, rt);     /* Erase the block */
00961                 scl = ecl = nxt;
00962             }
00963 #endif
00964             clst = nxt; /* Next cluster */
00965         }
00966     }
00967 
00968     return res;
00969 }
00970 #endif
00971 
00972 
00973 
00974 
00975 /*-----------------------------------------------------------------------*/
00976 /* FAT handling - Stretch or Create a cluster chain                      */
00977 /*-----------------------------------------------------------------------*/
00978 #if !_FS_READONLY
00979 static
00980 DWORD create_chain (    /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
00981     FATFS *fs,          /* File system object */
00982     DWORD clst          /* Cluster# to stretch. 0 means create a new chain. */
00983 )
00984 {
00985     DWORD cs, ncl, scl;
00986     FRESULT res;
00987 
00988 
00989     if (clst == 0) {        /* Create a new chain */
00990         scl = fs->last_clust;           /* Get suggested start point */
00991         if (!scl || scl >= fs->n_fatent) scl = 1;
00992     }
00993     else {                  /* Stretch the current chain */
00994         cs = get_fat(fs, clst);         /* Check the cluster status */
00995         if (cs < 2) return 1;           /* It is an invalid cluster */
00996         if (cs < fs->n_fatent) return cs;   /* It is already followed by next cluster */
00997         scl = clst;
00998     }
00999 
01000     ncl = scl;              /* Start cluster */
01001     for (;;) {
01002         ncl++;                          /* Next cluster */
01003         if (ncl >= fs->n_fatent) {      /* Wrap around */
01004             ncl = 2;
01005             if (ncl > scl) return 0;    /* No free cluster */
01006         }
01007         cs = get_fat(fs, ncl);          /* Get the cluster status */
01008         if (cs == 0) break;             /* Found a free cluster */
01009         if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */
01010             return cs;
01011         if (ncl == scl) return 0;       /* No free cluster */
01012     }
01013 
01014     res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */
01015     if (res == FR_OK && clst != 0) {
01016         res = put_fat(fs, clst, ncl);   /* Link it to the previous one if needed */
01017     }
01018     if (res == FR_OK) {
01019         fs->last_clust = ncl;           /* Update FSINFO */
01020         if (fs->free_clust != 0xFFFFFFFF) {
01021             fs->free_clust--;
01022             fs->fsi_flag = 1;
01023         }
01024     } else {
01025         ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
01026     }
01027 
01028     return ncl;     /* Return new cluster number or error code */
01029 }
01030 #endif /* !_FS_READONLY */
01031 
01032 
01033 
01034 /*-----------------------------------------------------------------------*/
01035 /* FAT handling - Convert offset into cluster with link map table        */
01036 /*-----------------------------------------------------------------------*/
01037 
01038 #if _USE_FASTSEEK
01039 static
01040 DWORD clmt_clust (  /* <2:Error, >=2:Cluster number */
01041     FIL* fp,        /* Pointer to the file object */
01042     DWORD ofs       /* File offset to be converted to cluster# */
01043 )
01044 {
01045     DWORD cl, ncl, *tbl;
01046 
01047 
01048     tbl = fp->cltbl + 1;    /* Top of CLMT */
01049     cl = ofs / SS(fp->fs) / fp->fs->csize;  /* Cluster order from top of the file */
01050     for (;;) {
01051         ncl = *tbl++;           /* Number of cluters in the fragment */
01052         if (!ncl) return 0;     /* End of table? (error) */
01053         if (cl < ncl) break;    /* In this fragment? */
01054         cl -= ncl; tbl++;       /* Next fragment */
01055     }
01056     return cl + *tbl;   /* Return the cluster number */
01057 }
01058 #endif  /* _USE_FASTSEEK */
01059 
01060 
01061 
01062 /*-----------------------------------------------------------------------*/
01063 /* Directory handling - Set directory index                              */
01064 /*-----------------------------------------------------------------------*/
01065 
01066 static
01067 FRESULT dir_sdi (
01068     FATFS_DIR *dj,        /* Pointer to directory object */
01069     WORD idx        /* Index of directory table */
01070 )
01071 {
01072     DWORD clst;
01073     WORD ic;
01074 
01075 
01076     dj->index = idx;
01077     clst = dj->sclust;
01078     if (clst == 1 || clst >= dj->fs->n_fatent)  /* Check start cluster range */
01079         return FR_INT_ERR;
01080     if (!clst && dj->fs->fs_type == FS_FAT32)   /* Replace cluster# 0 with root cluster# if in FAT32 */
01081         clst = dj->fs->dirbase;
01082 
01083     if (clst == 0) {    /* Static table (root-dir in FAT12/16) */
01084         dj->clust = clst;
01085         if (idx >= dj->fs->n_rootdir)       /* Index is out of range */
01086             return FR_INT_ERR;
01087         dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR);   /* Sector# */
01088     }
01089     else {              /* Dynamic table (sub-dirs or root-dir in FAT32) */
01090         ic = SS(dj->fs) / SZ_DIR * dj->fs->csize;   /* Entries per cluster */
01091         while (idx >= ic) { /* Follow cluster chain */
01092             clst = get_fat(dj->fs, clst);               /* Get next cluster */
01093             if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
01094             if (clst < 2 || clst >= dj->fs->n_fatent)   /* Reached to end of table or int error */
01095                 return FR_INT_ERR;
01096             idx -= ic;
01097         }
01098         dj->clust = clst;
01099         dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR);  /* Sector# */
01100     }
01101 
01102     dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */
01103 
01104     return FR_OK;   /* Seek succeeded */
01105 }
01106 
01107 
01108 
01109 
01110 /*-----------------------------------------------------------------------*/
01111 /* Directory handling - Move directory table index next                  */
01112 /*-----------------------------------------------------------------------*/
01113 
01114 static
01115 FRESULT dir_next (  /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */
01116     FATFS_DIR *dj,        /* Pointer to directory object */
01117     int stretch     /* 0: Do not stretch table, 1: Stretch table if needed */
01118 )
01119 {
01120     DWORD clst;
01121     WORD i;
01122 
01123 
01124     stretch = stretch;      /* To suppress warning on read-only cfg. */
01125     i = dj->index + 1;
01126     if (!i || !dj->sect)    /* Report EOT when index has reached 65535 */
01127         return FR_NO_FILE;
01128 
01129     if (!(i % (SS(dj->fs) / SZ_DIR))) { /* Sector changed? */
01130         dj->sect++;                 /* Next sector */
01131 
01132         if (dj->clust == 0) {   /* Static table */
01133             if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */
01134                 return FR_NO_FILE;
01135         }
01136         else {                  /* Dynamic table */
01137             if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
01138                 clst = get_fat(dj->fs, dj->clust);              /* Get next cluster */
01139                 if (clst <= 1) return FR_INT_ERR;
01140                 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
01141                 if (clst >= dj->fs->n_fatent) {                 /* When it reached end of dynamic table */
01142 #if !_FS_READONLY
01143                     BYTE c;
01144                     if (!stretch) return FR_NO_FILE;            /* When do not stretch, report EOT */
01145                     clst = create_chain(dj->fs, dj->clust);     /* Stretch cluster chain */
01146                     if (clst == 0) return FR_DENIED;            /* No free cluster */
01147                     if (clst == 1) return FR_INT_ERR;
01148                     if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
01149                     /* Clean-up stretched table */
01150                     if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */
01151                     mem_set(dj->fs->win, 0, SS(dj->fs));            /* Clear window buffer */
01152                     dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */
01153                     for (c = 0; c < dj->fs->csize; c++) {       /* Fill the new cluster with 0 */
01154                         dj->fs->wflag = 1;
01155                         if (move_window(dj->fs, 0)) return FR_DISK_ERR;
01156                         dj->fs->winsect++;
01157                     }
01158                     dj->fs->winsect -= c;                       /* Rewind window address */
01159 #else
01160                     return FR_NO_FILE;          /* Report EOT */
01161 #endif
01162                 }
01163                 dj->clust = clst;               /* Initialize data for new cluster */
01164                 dj->sect = clust2sect(dj->fs, clst);
01165             }
01166         }
01167     }
01168 
01169     dj->index = i;
01170     dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR;
01171 
01172     return FR_OK;
01173 }
01174 
01175 
01176 
01177 
01178 /*-----------------------------------------------------------------------*/
01179 /* Directory handling - Load/Store start cluster number                  */
01180 /*-----------------------------------------------------------------------*/
01181 
01182 static
01183 DWORD ld_clust (
01184     FATFS *fs,  /* Pointer to the fs object */
01185     BYTE *dir   /* Pointer to the directory entry */
01186 )
01187 {
01188     DWORD cl;
01189 
01190     cl = LD_WORD(dir+DIR_FstClusLO);
01191     if (fs->fs_type == FS_FAT32)
01192         cl |= (DWORD)LD_WORD(dir+DIR_FstClusHI) << 16;
01193 
01194     return cl;
01195 }
01196 
01197 
01198 #if !_FS_READONLY
01199 static
01200 void st_clust (
01201     BYTE *dir,  /* Pointer to the directory entry */
01202     DWORD cl    /* Value to be set */
01203 )
01204 {
01205     ST_WORD(dir+DIR_FstClusLO, cl);
01206     ST_WORD(dir+DIR_FstClusHI, cl >> 16);
01207 }
01208 #endif
01209 
01210 
01211 
01212 /*-----------------------------------------------------------------------*/
01213 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry   */
01214 /*-----------------------------------------------------------------------*/
01215 #if _USE_LFN
01216 static
01217 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30};  /* Offset of LFN chars in the directory entry */
01218 
01219 
01220 static
01221 int cmp_lfn (           /* 1:Matched, 0:Not matched */
01222     WCHAR *lfnbuf,      /* Pointer to the LFN to be compared */
01223     BYTE *dir           /* Pointer to the directory entry containing a part of LFN */
01224 )
01225 {
01226     UINT i, s;
01227     WCHAR wc, uc;
01228 
01229 
01230     i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13;  /* Get offset in the LFN buffer */
01231     s = 0; wc = 1;
01232     do {
01233         uc = LD_WORD(dir+LfnOfs[s]);    /* Pick an LFN character from the entry */
01234         if (wc) {   /* Last char has not been processed */
01235             wc = ff_wtoupper(uc);       /* Convert it to upper case */
01236             if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++]))    /* Compare it */
01237                 return 0;               /* Not matched */
01238         } else {
01239             if (uc != 0xFFFF) return 0; /* Check filler */
01240         }
01241     } while (++s < 13);             /* Repeat until all chars in the entry are checked */
01242 
01243     if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i])   /* Last segment matched but different length */
01244         return 0;
01245 
01246     return 1;                       /* The part of LFN matched */
01247 }
01248 
01249 
01250 
01251 static
01252 int pick_lfn (          /* 1:Succeeded, 0:Buffer overflow */
01253     WCHAR *lfnbuf,      /* Pointer to the Unicode-LFN buffer */
01254     BYTE *dir           /* Pointer to the directory entry */
01255 )
01256 {
01257     UINT i, s;
01258     WCHAR wc, uc;
01259 
01260 
01261     i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13;  /* Offset in the LFN buffer */
01262 
01263     s = 0; wc = 1;
01264     do {
01265         uc = LD_WORD(dir+LfnOfs[s]);        /* Pick an LFN character from the entry */
01266         if (wc) {   /* Last char has not been processed */
01267             if (i >= _MAX_LFN) return 0;    /* Buffer overflow? */
01268             lfnbuf[i++] = wc = uc;          /* Store it */
01269         } else {
01270             if (uc != 0xFFFF) return 0;     /* Check filler */
01271         }
01272     } while (++s < 13);                     /* Read all character in the entry */
01273 
01274     if (dir[LDIR_Ord] & LLE) {              /* Put terminator if it is the last LFN part */
01275         if (i >= _MAX_LFN) return 0;        /* Buffer overflow? */
01276         lfnbuf[i] = 0;
01277     }
01278 
01279     return 1;
01280 }
01281 
01282 
01283 #if !_FS_READONLY
01284 static
01285 void fit_lfn (
01286     const WCHAR *lfnbuf,    /* Pointer to the LFN buffer */
01287     BYTE *dir,              /* Pointer to the directory entry */
01288     BYTE ord,               /* LFN order (1-20) */
01289     BYTE sum                /* SFN sum */
01290 )
01291 {
01292     UINT i, s;
01293     WCHAR wc;
01294 
01295 
01296     dir[LDIR_Chksum] = sum;         /* Set check sum */
01297     dir[LDIR_Attr] = AM_LFN;        /* Set attribute. LFN entry */
01298     dir[LDIR_Type] = 0;
01299     ST_WORD(dir+LDIR_FstClusLO, 0);
01300 
01301     i = (ord - 1) * 13;             /* Get offset in the LFN buffer */
01302     s = wc = 0;
01303     do {
01304         if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */
01305         ST_WORD(dir+LfnOfs[s], wc); /* Put it */
01306         if (!wc) wc = 0xFFFF;       /* Padding chars following last char */
01307     } while (++s < 13);
01308     if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE; /* Bottom LFN part is the start of LFN sequence */
01309     dir[LDIR_Ord] = ord;            /* Set the LFN order */
01310 }
01311 
01312 #endif
01313 #endif
01314 
01315 
01316 
01317 /*-----------------------------------------------------------------------*/
01318 /* Create numbered name                                                  */
01319 /*-----------------------------------------------------------------------*/
01320 #if _USE_LFN
01321 void gen_numname (
01322     BYTE *dst,          /* Pointer to generated SFN */
01323     const BYTE *src,    /* Pointer to source SFN to be modified */
01324     const WCHAR *lfn,   /* Pointer to LFN */
01325     WORD seq            /* Sequence number */
01326 )
01327 {
01328     BYTE ns[8], c;
01329     UINT i, j;
01330 
01331 
01332     mem_cpy(dst, src, 11);
01333 
01334     if (seq > 5) {  /* On many collisions, generate a hash number instead of sequential number */
01335         do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; while (*lfn);
01336     }
01337 
01338     /* itoa (hexdecimal) */
01339     i = 7;
01340     do {
01341         c = (seq % 16) + '0';
01342         if (c > '9') c += 7;
01343         ns[i--] = c;
01344         seq /= 16;
01345     } while (seq);
01346     ns[i] = '~';
01347 
01348     /* Append the number */
01349     for (j = 0; j < i && dst[j] != ' '; j++) {
01350         if (IsDBCS1(dst[j])) {
01351             if (j == i - 1) break;
01352             j++;
01353         }
01354     }
01355     do {
01356         dst[j++] = (i < 8) ? ns[i++] : ' ';
01357     } while (j < 8);
01358 }
01359 #endif
01360 
01361 
01362 
01363 
01364 /*-----------------------------------------------------------------------*/
01365 /* Calculate sum of an SFN                                               */
01366 /*-----------------------------------------------------------------------*/
01367 #if _USE_LFN
01368 static
01369 BYTE sum_sfn (
01370     const BYTE *dir     /* Ptr to directory entry */
01371 )
01372 {
01373     BYTE sum = 0;
01374     UINT n = 11;
01375 
01376     do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
01377     return sum;
01378 }
01379 #endif
01380 
01381 
01382 
01383 
01384 /*-----------------------------------------------------------------------*/
01385 /* Directory handling - Find an object in the directory                  */
01386 /*-----------------------------------------------------------------------*/
01387 
01388 static
01389 FRESULT dir_find (
01390     FATFS_DIR *dj         /* Pointer to the directory object linked to the file name */
01391 )
01392 {
01393     FRESULT res;
01394     BYTE c, *dir;
01395 #if _USE_LFN
01396     BYTE a, ord, sum;
01397 #endif
01398 
01399     res = dir_sdi(dj, 0);           /* Rewind directory object */
01400     if (res != FR_OK) return res;
01401 
01402 #if _USE_LFN
01403     ord = sum = 0xFF;
01404 #endif
01405     do {
01406         res = move_window(dj->fs, dj->sect);
01407         if (res != FR_OK) break;
01408         dir = dj->dir;                  /* Ptr to the directory entry of current index */
01409         c = dir[DIR_Name];
01410         if (c == 0) { res = FR_NO_FILE; break; }    /* Reached to end of table */
01411 #if _USE_LFN    /* LFN configuration */
01412         a = dir[DIR_Attr] & AM_MASK;
01413         if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) {    /* An entry without valid data */
01414             ord = 0xFF;
01415         } else {
01416             if (a == AM_LFN) {          /* An LFN entry is found */
01417                 if (dj->lfn) {
01418                     if (c & LLE) {      /* Is it start of LFN sequence? */
01419                         sum = dir[LDIR_Chksum];
01420                         c &= ~LLE; ord = c; /* LFN start order */
01421                         dj->lfn_idx = dj->index;
01422                     }
01423                     /* Check validity of the LFN entry and compare it with given name */
01424                     ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
01425                 }
01426             } else {                    /* An SFN entry is found */
01427                 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
01428                 ord = 0xFF; dj->lfn_idx = 0xFFFF;   /* Reset LFN sequence */
01429                 if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break;    /* SFN matched? */
01430             }
01431         }
01432 #else       /* Non LFN configuration */
01433         if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
01434             break;
01435 #endif
01436         res = dir_next(dj, 0);      /* Next entry */
01437     } while (res == FR_OK);
01438 
01439     return res;
01440 }
01441 
01442 
01443 
01444 
01445 /*-----------------------------------------------------------------------*/
01446 /* Read an object from the directory                                     */
01447 /*-----------------------------------------------------------------------*/
01448 #if _FS_MINIMIZE <= 1
01449 static
01450 FRESULT dir_read (
01451     FATFS_DIR *dj         /* Pointer to the directory object that pointing the entry to be read */
01452 )
01453 {
01454     FRESULT res;
01455     BYTE c, *dir;
01456 #if _USE_LFN
01457     BYTE a, ord = 0xFF, sum = 0xFF;
01458 #endif
01459 
01460     res = FR_NO_FILE;
01461     while (dj->sect) {
01462         res = move_window(dj->fs, dj->sect);
01463         if (res != FR_OK) break;
01464         dir = dj->dir;                  /* Ptr to the directory entry of current index */
01465         c = dir[DIR_Name];
01466         if (c == 0) { res = FR_NO_FILE; break; }    /* Reached to end of table */
01467 #if _USE_LFN    /* LFN configuration */
01468         a = dir[DIR_Attr] & AM_MASK;
01469         if (c == DDE || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) {    /* An entry without valid data */
01470             ord = 0xFF;
01471         } else {
01472             if (a == AM_LFN) {          /* An LFN entry is found */
01473                 if (c & LLE) {          /* Is it start of LFN sequence? */
01474                     sum = dir[LDIR_Chksum];
01475                     c &= ~LLE; ord = c;
01476                     dj->lfn_idx = dj->index;
01477                 }
01478                 /* Check LFN validity and capture it */
01479                 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
01480             } else {                    /* An SFN entry is found */
01481                 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
01482                     dj->lfn_idx = 0xFFFF;       /* It has no LFN. */
01483                 break;
01484             }
01485         }
01486 #else       /* Non LFN configuration */
01487         if (c != DDE && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL))   /* Is it a valid entry? */
01488             break;
01489 #endif
01490         res = dir_next(dj, 0);              /* Next entry */
01491         if (res != FR_OK) break;
01492     }
01493 
01494     if (res != FR_OK) dj->sect = 0;
01495 
01496     return res;
01497 }
01498 #endif
01499 
01500 
01501 
01502 /*-----------------------------------------------------------------------*/
01503 /* Register an object to the directory                                   */
01504 /*-----------------------------------------------------------------------*/
01505 #if !_FS_READONLY
01506 static
01507 FRESULT dir_register (  /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
01508     FATFS_DIR *dj             /* Target directory with object name to be created */
01509 )
01510 {
01511     FRESULT res;
01512     BYTE c, *dir;
01513 #if _USE_LFN    /* LFN configuration */
01514     WORD n, ne, is;
01515     BYTE sn[12], *fn, sum;
01516     WCHAR *lfn;
01517 
01518 
01519     fn = dj->fn; lfn = dj->lfn;
01520     mem_cpy(sn, fn, 12);
01521 
01522     if (_FS_RPATH && (sn[NS] & NS_DOT))     /* Cannot create dot entry */
01523         return FR_INVALID_NAME;
01524 
01525     if (sn[NS] & NS_LOSS) {         /* When LFN is out of 8.3 format, generate a numbered name */
01526         fn[NS] = 0; dj->lfn = 0;            /* Find only SFN */
01527         for (n = 1; n < 100; n++) {
01528             gen_numname(fn, sn, lfn, n);    /* Generate a numbered name */
01529             res = dir_find(dj);             /* Check if the name collides with existing SFN */
01530             if (res != FR_OK) break;
01531         }
01532         if (n == 100) return FR_DENIED;     /* Abort if too many collisions */
01533         if (res != FR_NO_FILE) return res;  /* Abort if the result is other than 'not collided' */
01534         fn[NS] = sn[NS]; dj->lfn = lfn;
01535     }
01536 
01537     if (sn[NS] & NS_LFN) {          /* When LFN is to be created, reserve an SFN + LFN entries. */
01538         for (ne = 0; lfn[ne]; ne++) ;
01539         ne = (ne + 25) / 13;
01540     } else {                        /* Otherwise reserve only an SFN entry. */
01541         ne = 1;
01542     }
01543 
01544     /* Reserve contiguous entries */
01545     res = dir_sdi(dj, 0);
01546     if (res != FR_OK) return res;
01547     n = is = 0;
01548     do {
01549         res = move_window(dj->fs, dj->sect);
01550         if (res != FR_OK) break;
01551         c = *dj->dir;               /* Check the entry status */
01552         if (c == DDE || c == 0) {   /* Is it a blank entry? */
01553             if (n == 0) is = dj->index; /* First index of the contiguous entry */
01554             if (++n == ne) break;   /* A contiguous entry that required count is found */
01555         } else {
01556             n = 0;                  /* Not a blank entry. Restart to search */
01557         }
01558         res = dir_next(dj, 1);      /* Next entry with table stretch */
01559     } while (res == FR_OK);
01560 
01561     if (res == FR_OK && ne > 1) {   /* Initialize LFN entry if needed */
01562         res = dir_sdi(dj, is);
01563         if (res == FR_OK) {
01564             sum = sum_sfn(dj->fn);  /* Sum of the SFN tied to the LFN */
01565             ne--;
01566             do {                    /* Store LFN entries in bottom first */
01567                 res = move_window(dj->fs, dj->sect);
01568                 if (res != FR_OK) break;
01569                 fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
01570                 dj->fs->wflag = 1;
01571                 res = dir_next(dj, 0);  /* Next entry */
01572             } while (res == FR_OK && --ne);
01573         }
01574     }
01575 
01576 #else   /* Non LFN configuration */
01577     res = dir_sdi(dj, 0);
01578     if (res == FR_OK) {
01579         do {    /* Find a blank entry for the SFN */
01580             res = move_window(dj->fs, dj->sect);
01581             if (res != FR_OK) break;
01582             c = *dj->dir;
01583             if (c == DDE || c == 0) break;  /* Is it a blank entry? */
01584             res = dir_next(dj, 1);          /* Next entry with table stretch */
01585         } while (res == FR_OK);
01586     }
01587 #endif
01588 
01589     if (res == FR_OK) {     /* Initialize the SFN entry */
01590         res = move_window(dj->fs, dj->sect);
01591         if (res == FR_OK) {
01592             dir = dj->dir;
01593             mem_set(dir, 0, SZ_DIR);    /* Clean the entry */
01594             mem_cpy(dir, dj->fn, 11);   /* Put SFN */
01595 #if _USE_LFN
01596             dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */
01597 #endif
01598             dj->fs->wflag = 1;
01599         }
01600     }
01601 
01602     return res;
01603 }
01604 #endif /* !_FS_READONLY */
01605 
01606 
01607 
01608 
01609 /*-----------------------------------------------------------------------*/
01610 /* Remove an object from the directory                                   */
01611 /*-----------------------------------------------------------------------*/
01612 #if !_FS_READONLY && !_FS_MINIMIZE
01613 static
01614 FRESULT dir_remove (    /* FR_OK: Successful, FR_DISK_ERR: A disk error */
01615     FATFS_DIR *dj             /* Directory object pointing the entry to be removed */
01616 )
01617 {
01618     FRESULT res;
01619 #if _USE_LFN    /* LFN configuration */
01620     WORD i;
01621 
01622     i = dj->index;  /* SFN index */
01623     res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx));   /* Goto the SFN or top of the LFN entries */
01624     if (res == FR_OK) {
01625         do {
01626             res = move_window(dj->fs, dj->sect);
01627             if (res != FR_OK) break;
01628             *dj->dir = DDE;         /* Mark the entry "deleted" */
01629             dj->fs->wflag = 1;
01630             if (dj->index >= i) break;  /* When reached SFN, all entries of the object has been deleted. */
01631             res = dir_next(dj, 0);      /* Next entry */
01632         } while (res == FR_OK);
01633         if (res == FR_NO_FILE) res = FR_INT_ERR;
01634     }
01635 
01636 #else           /* Non LFN configuration */
01637     res = dir_sdi(dj, dj->index);
01638     if (res == FR_OK) {
01639         res = move_window(dj->fs, dj->sect);
01640         if (res == FR_OK) {
01641             *dj->dir = DDE;         /* Mark the entry "deleted" */
01642             dj->fs->wflag = 1;
01643         }
01644     }
01645 #endif
01646 
01647     return res;
01648 }
01649 #endif /* !_FS_READONLY */
01650 
01651 
01652 
01653 
01654 /*-----------------------------------------------------------------------*/
01655 /* Pick a segment and create the object name in directory form           */
01656 /*-----------------------------------------------------------------------*/
01657 
01658 static
01659 FRESULT create_name (
01660     FATFS_DIR *dj,            /* Pointer to the directory object */
01661     const TCHAR **path  /* Pointer to pointer to the segment in the path string */
01662 )
01663 {
01664 #ifdef _EXCVT
01665     static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */
01666 #endif
01667 
01668 #if _USE_LFN    /* LFN configuration */
01669     BYTE b, cf;
01670     WCHAR w, *lfn;
01671     UINT i, ni, si, di;
01672     const TCHAR *p;
01673 
01674     /* Create LFN in Unicode */
01675     for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
01676     lfn = dj->lfn;
01677     si = di = 0;
01678     for (;;) {
01679         w = p[si++];                    /* Get a character */
01680         if (w < ' ' || w == '/' || w == '\\') break;    /* Break on end of segment */
01681         if (di >= _MAX_LFN)             /* Reject too long name */
01682             return FR_INVALID_NAME;
01683 #if !_LFN_UNICODE
01684         w &= 0xFF;
01685         if (IsDBCS1(w)) {               /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
01686             b = (BYTE)p[si++];          /* Get 2nd byte */
01687             if (!IsDBCS2(b))
01688                 return FR_INVALID_NAME; /* Reject invalid sequence */
01689             w = (w << 8) + b;           /* Create a DBC */
01690         }
01691         w = ff_convert(w, 1);           /* Convert ANSI/OEM to Unicode */
01692         if (!w) return FR_INVALID_NAME; /* Reject invalid code */
01693 #endif
01694         if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */
01695             return FR_INVALID_NAME;
01696         lfn[di++] = w;                  /* Store the Unicode char */
01697     }
01698     *path = &p[si];                     /* Return pointer to the next segment */
01699     cf = (w < ' ') ? NS_LAST : 0;       /* Set last segment flag if end of path */
01700 #if _FS_RPATH
01701     if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */
01702         (di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) {
01703         lfn[di] = 0;
01704         for (i = 0; i < 11; i++)
01705             dj->fn[i] = (i < di) ? '.' : ' ';
01706         dj->fn[i] = cf | NS_DOT;        /* This is a dot entry */
01707         return FR_OK;
01708     }
01709 #endif
01710     while (di) {                        /* Strip trailing spaces and dots */
01711         w = lfn[di-1];
01712         if (w != ' ' && w != '.') break;
01713         di--;
01714     }
01715     if (!di) return FR_INVALID_NAME;    /* Reject nul string */
01716 
01717     lfn[di] = 0;                        /* LFN is created */
01718 
01719     /* Create SFN in directory form */
01720     mem_set(dj->fn, ' ', 11);
01721     for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ;  /* Strip leading spaces and dots */
01722     if (si) cf |= NS_LOSS | NS_LFN;
01723     while (di && lfn[di - 1] != '.') di--;  /* Find extension (di<=si: no extension) */
01724 
01725     b = i = 0; ni = 8;
01726     for (;;) {
01727         w = lfn[si++];                  /* Get an LFN char */
01728         if (!w) break;                  /* Break on end of the LFN */
01729         if (w == ' ' || (w == '.' && si != di)) {   /* Remove spaces and dots */
01730             cf |= NS_LOSS | NS_LFN; continue;
01731         }
01732 
01733         if (i >= ni || si == di) {      /* Extension or end of SFN */
01734             if (ni == 11) {             /* Long extension */
01735                 cf |= NS_LOSS | NS_LFN; break;
01736             }
01737             if (si != di) cf |= NS_LOSS | NS_LFN;   /* Out of 8.3 format */
01738             if (si > di) break;         /* No extension */
01739             si = di; i = 8; ni = 11;    /* Enter extension section */
01740             b <<= 2; continue;
01741         }
01742 
01743         if (w >= 0x80) {                /* Non ASCII char */
01744 #ifdef _EXCVT
01745             w = ff_convert(w, 0);       /* Unicode -> OEM code */
01746             if (w) w = excvt[w - 0x80]; /* Convert extended char to upper (SBCS) */
01747 #else
01748             w = ff_convert(ff_wtoupper(w), 0);  /* Upper converted Unicode -> OEM code */
01749 #endif
01750             cf |= NS_LFN;               /* Force create LFN entry */
01751         }
01752 
01753         if (_DF1S && w >= 0x100) {      /* Double byte char (always false on SBCS cfg) */
01754             if (i >= ni - 1) {
01755                 cf |= NS_LOSS | NS_LFN; i = ni; continue;
01756             }
01757             dj->fn[i++] = (BYTE)(w >> 8);
01758         } else {                        /* Single byte char */
01759             if (!w || chk_chr("+,;=[]", w)) {   /* Replace illegal chars for SFN */
01760                 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
01761             } else {
01762                 if (IsUpper(w)) {       /* ASCII large capital */
01763                     b |= 2;
01764                 } else {
01765                     if (IsLower(w)) {   /* ASCII small capital */
01766                         b |= 1; w -= 0x20;
01767                     }
01768                 }
01769             }
01770         }
01771         dj->fn[i++] = (BYTE)w;
01772     }
01773 
01774     if (dj->fn[0] == DDE) dj->fn[0] = NDDE; /* If the first char collides with deleted mark, replace it with 0x05 */
01775 
01776     if (ni == 8) b <<= 2;
01777     if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03)   /* Create LFN entry when there are composite capitals */
01778         cf |= NS_LFN;
01779     if (!(cf & NS_LFN)) {                       /* When LFN is in 8.3 format without extended char, NT flags are created */
01780         if ((b & 0x03) == 0x01) cf |= NS_EXT;   /* NT flag (Extension has only small capital) */
01781         if ((b & 0x0C) == 0x04) cf |= NS_BODY;  /* NT flag (Filename has only small capital) */
01782     }
01783 
01784     dj->fn[NS] = cf;    /* SFN is created */
01785 
01786     return FR_OK;
01787 
01788 
01789 #else   /* Non-LFN configuration */
01790     BYTE b, c, d, *sfn;
01791     UINT ni, si, i;
01792     const char *p;
01793 
01794     /* Create file name in directory form */
01795     for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
01796     sfn = dj->fn;
01797     mem_set(sfn, ' ', 11);
01798     si = i = b = 0; ni = 8;
01799 #if _FS_RPATH
01800     if (p[si] == '.') { /* Is this a dot entry? */
01801         for (;;) {
01802             c = (BYTE)p[si++];
01803             if (c != '.' || si >= 3) break;
01804             sfn[i++] = c;
01805         }
01806         if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
01807         *path = &p[si];                                 /* Return pointer to the next segment */
01808         sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT;   /* Set last segment flag if end of path */
01809         return FR_OK;
01810     }
01811 #endif
01812     for (;;) {
01813         c = (BYTE)p[si++];
01814         if (c <= ' ' || c == '/' || c == '\\') break;   /* Break on end of segment */
01815         if (c == '.' || i >= ni) {
01816             if (ni != 8 || c != '.') return FR_INVALID_NAME;
01817             i = 8; ni = 11;
01818             b <<= 2; continue;
01819         }
01820         if (c >= 0x80) {                /* Extended char? */
01821             b |= 3;                     /* Eliminate NT flag */
01822 #ifdef _EXCVT
01823             c = excvt[c - 0x80];        /* Upper conversion (SBCS) */
01824 #else
01825 #if !_DF1S  /* ASCII only cfg */
01826             return FR_INVALID_NAME;
01827 #endif
01828 #endif
01829         }
01830         if (IsDBCS1(c)) {               /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
01831             d = (BYTE)p[si++];          /* Get 2nd byte */
01832             if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
01833                 return FR_INVALID_NAME;
01834             sfn[i++] = c;
01835             sfn[i++] = d;
01836         } else {                        /* Single byte code */
01837             if (chk_chr("\"*+,:;<=>\?[]|\x7F", c))  /* Reject illegal chrs for SFN */
01838                 return FR_INVALID_NAME;
01839             if (IsUpper(c)) {           /* ASCII large capital? */
01840                 b |= 2;
01841             } else {
01842                 if (IsLower(c)) {       /* ASCII small capital? */
01843                     b |= 1; c -= 0x20;
01844                 }
01845             }
01846             sfn[i++] = c;
01847         }
01848     }
01849     *path = &p[si];                     /* Return pointer to the next segment */
01850     c = (c <= ' ') ? NS_LAST : 0;       /* Set last segment flag if end of path */
01851 
01852     if (!i) return FR_INVALID_NAME;     /* Reject nul string */
01853     if (sfn[0] == DDE) sfn[0] = NDDE;   /* When first char collides with DDE, replace it with 0x05 */
01854 
01855     if (ni == 8) b <<= 2;
01856     if ((b & 0x03) == 0x01) c |= NS_EXT;    /* NT flag (Name extension has only small capital) */
01857     if ((b & 0x0C) == 0x04) c |= NS_BODY;   /* NT flag (Name body has only small capital) */
01858 
01859     sfn[NS] = c;        /* Store NT flag, File name is created */
01860 
01861     return FR_OK;
01862 #endif
01863 }
01864 
01865 
01866 
01867 
01868 /*-----------------------------------------------------------------------*/
01869 /* Get file information from directory entry                             */
01870 /*-----------------------------------------------------------------------*/
01871 #if _FS_MINIMIZE <= 1
01872 static
01873 void get_fileinfo (     /* No return code */
01874     FATFS_DIR *dj,            /* Pointer to the directory object */
01875     FILINFO *fno        /* Pointer to the file information to be filled */
01876 )
01877 {
01878     UINT i;
01879     BYTE nt, *dir;
01880     TCHAR *p, c;
01881 
01882 
01883     p = fno->fname;
01884     if (dj->sect) {
01885         dir = dj->dir;
01886         nt = dir[DIR_NTres];        /* NT flag */
01887         for (i = 0; i < 8; i++) {   /* Copy name body */
01888             c = dir[i];
01889             if (c == ' ') break;
01890             if (c == NDDE) c = (TCHAR)DDE;
01891             if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20;
01892 #if _LFN_UNICODE
01893             if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1]))
01894                 c = (c << 8) | dir[++i];
01895             c = ff_convert(c, 1);
01896             if (!c) c = '?';
01897 #endif
01898             *p++ = c;
01899         }
01900         if (dir[8] != ' ') {        /* Copy name extension */
01901             *p++ = '.';
01902             for (i = 8; i < 11; i++) {
01903                 c = dir[i];
01904                 if (c == ' ') break;
01905                 if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20;
01906 #if _LFN_UNICODE
01907                 if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1]))
01908                     c = (c << 8) | dir[++i];
01909                 c = ff_convert(c, 1);
01910                 if (!c) c = '?';
01911 #endif
01912                 *p++ = c;
01913             }
01914         }
01915         fno->fattrib = dir[DIR_Attr];               /* Attribute */
01916         fno->fsize = LD_DWORD(dir+DIR_FileSize);    /* Size */
01917         fno->fdate = LD_WORD(dir+DIR_WrtDate);      /* Date */
01918         fno->ftime = LD_WORD(dir+DIR_WrtTime);      /* Time */
01919     }
01920     *p = 0;     /* Terminate SFN str by a \0 */
01921 
01922 #if _USE_LFN
01923     if (fno->lfname && fno->lfsize) {
01924         TCHAR *tp = fno->lfname;
01925         WCHAR w, *lfn;
01926 
01927         i = 0;
01928         if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
01929             lfn = dj->lfn;
01930             while ((w = *lfn++) != 0) {         /* Get an LFN char */
01931 #if !_LFN_UNICODE
01932                 w = ff_convert(w, 0);           /* Unicode -> OEM conversion */
01933                 if (!w) { i = 0; break; }       /* Could not convert, no LFN */
01934                 if (_DF1S && w >= 0x100)        /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
01935                     tp[i++] = (TCHAR)(w >> 8);
01936 #endif
01937                 if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overflow, no LFN */
01938                 tp[i++] = (TCHAR)w;
01939             }
01940         }
01941         tp[i] = 0;  /* Terminate the LFN str by a \0 */
01942     }
01943 #endif
01944 }
01945 #endif /* _FS_MINIMIZE <= 1 */
01946 
01947 
01948 
01949 
01950 /*-----------------------------------------------------------------------*/
01951 /* Follow a file path                                                    */
01952 /*-----------------------------------------------------------------------*/
01953 
01954 static
01955 FRESULT follow_path (   /* FR_OK(0): successful, !=0: error code */
01956     FATFS_DIR *dj,            /* Directory object to return last directory and found object */
01957     const TCHAR *path   /* Full-path string to find a file or directory */
01958 )
01959 {
01960     FRESULT res;
01961     BYTE *dir, ns;
01962 
01963 
01964 #if _FS_RPATH
01965     if (*path == '/' || *path == '\\') { /* There is a heading separator */
01966         path++; dj->sclust = 0;     /* Strip it and start from the root dir */
01967     } else {                            /* No heading separator */
01968         dj->sclust = dj->fs->cdir;  /* Start from the current dir */
01969     }
01970 #else
01971     if (*path == '/' || *path == '\\')  /* Strip heading separator if exist */
01972         path++;
01973     dj->sclust = 0;                     /* Start from the root dir */
01974 #endif
01975 
01976     if ((UINT)*path < ' ') {            /* Nul path means the start directory itself */
01977         res = dir_sdi(dj, 0);
01978         dj->dir = 0;
01979     } else {                            /* Follow path */
01980         for (;;) {
01981             res = create_name(dj, &path);   /* Get a segment */
01982             if (res != FR_OK) break;
01983             res = dir_find(dj);             /* Find it */
01984             ns = *(dj->fn+NS);
01985             if (res != FR_OK) {             /* Failed to find the object */
01986                 if (res != FR_NO_FILE) break;   /* Abort if any hard error occurred */
01987                 /* Object not found */
01988                 if (_FS_RPATH && (ns & NS_DOT)) {   /* If dot entry is not exit */
01989                     dj->sclust = 0; dj->dir = 0;    /* It is the root dir */
01990                     res = FR_OK;
01991                     if (!(ns & NS_LAST)) continue;
01992                 } else {                            /* Could not find the object */
01993                     if (!(ns & NS_LAST)) res = FR_NO_PATH;
01994                 }
01995                 break;
01996             }
01997             if (ns & NS_LAST) break;            /* Last segment match. Function completed. */
01998             dir = dj->dir;                      /* There is next segment. Follow the sub directory */
01999             if (!(dir[DIR_Attr] & AM_DIR)) {    /* Cannot follow because it is a file */
02000                 res = FR_NO_PATH; break;
02001             }
02002             dj->sclust = ld_clust(dj->fs, dir);
02003         }
02004     }
02005 
02006     return res;
02007 }
02008 
02009 
02010 
02011 
02012 /*-----------------------------------------------------------------------*/
02013 /* Load a sector and check if it is an FAT Volume Boot Record            */
02014 /*-----------------------------------------------------------------------*/
02015 
02016 static
02017 BYTE check_fs ( /* 0:FAT-VBR, 1:Any BR but not FAT, 2:Not a BR, 3:Disk error */
02018     FATFS *fs,  /* File system object */
02019     DWORD sect  /* Sector# (lba) to check if it is an FAT boot record or not */
02020 )
02021 {
02022     if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK) /* Load boot record */
02023         return 3;
02024     if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55)       /* Check record signature (always placed at offset 510 even if the sector size is >512) */
02025         return 2;
02026 
02027     if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
02028         return 0;
02029     if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
02030         return 0;
02031 
02032     return 1;
02033 }
02034 
02035 
02036 
02037 
02038 /*-----------------------------------------------------------------------*/
02039 /* Check if the file system object is valid or not                       */
02040 /*-----------------------------------------------------------------------*/
02041 
02042 static
02043 FRESULT chk_mounted (   /* FR_OK(0): successful, !=0: any error occurred */
02044     const TCHAR **path, /* Pointer to pointer to the path name (drive number) */
02045     FATFS **rfs,        /* Pointer to pointer to the found file system object */
02046     BYTE wmode          /* !=0: Check write protection for write access */
02047 )
02048 {
02049     BYTE fmt, b, pi, *tbl;
02050     UINT vol;
02051     DSTATUS stat;
02052     DWORD bsect, fasize, tsect, sysect, nclst, szbfat;
02053     WORD nrsv;
02054     const TCHAR *p = *path;
02055     FATFS *fs;
02056 
02057 
02058     /* Get logical drive number from the path name */
02059     vol = p[0] - '0';                   /* Is there a drive number? */
02060     if (vol <= 9 && p[1] == ':') {      /* Found a drive number, get and strip it */
02061         p += 2; *path = p;              /* Return pointer to the path name */
02062     } else {                            /* No drive number is given */
02063 #if _FS_RPATH
02064         vol = CurrVol;                  /* Use current drive */
02065 #else
02066         vol = 0;                        /* Use drive 0 */
02067 #endif
02068     }
02069 
02070     /* Check if the file system object is valid or not */
02071     *rfs = 0;
02072     if (vol >= _VOLUMES)                /* Is the drive number valid? */
02073         return FR_INVALID_DRIVE;
02074     fs = FatFs[vol];                    /* Get corresponding file system object */
02075     if (!fs) return FR_NOT_ENABLED;     /* Is the file system object available? */
02076 
02077     ENTER_FF(fs);                       /* Lock file system */
02078 
02079     *rfs = fs;                          /* Return pointer to the corresponding file system object */
02080     if (fs->fs_type) {                  /* If the volume has been mounted */
02081         stat = disk_status(fs->drv);
02082         if (!(stat & STA_NOINIT)) {     /* and the physical drive is kept initialized (has not been changed), */
02083             if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */
02084                 return FR_WRITE_PROTECTED;
02085             return FR_OK;               /* The file system object is valid */
02086         }
02087     }
02088 
02089     /* The file system object is not valid. */
02090     /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
02091 
02092     fs->fs_type = 0;                    /* Clear the file system object */
02093     fs->drv = LD2PD(vol);               /* Bind the logical drive and a physical drive */
02094     stat = disk_initialize(fs->drv);    /* Initialize the physical drive */
02095     if (stat & STA_NOINIT)              /* Check if the initialization succeeded */
02096         return FR_NOT_READY;            /* Failed to initialize due to no medium or hard error */
02097     if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */
02098         return FR_WRITE_PROTECTED;
02099 #if _MAX_SS != 512                      /* Get disk sector size (variable sector size cfg only) */
02100     if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK)
02101         return FR_DISK_ERR;
02102 #endif
02103     /* Search FAT partition on the drive. Supports only generic partitions, FDISK and SFD. */
02104     fmt = check_fs(fs, bsect = 0);      /* Load sector 0 and check if it is an FAT-VBR (in SFD) */
02105     if (LD2PT(vol) && !fmt) fmt = 1;    /* Force non-SFD if the volume is forced partition */
02106     if (fmt == 1) {                     /* Not an FAT-VBR, the physical drive can be partitioned */
02107         /* Check the partition listed in the partition table */
02108         pi = LD2PT(vol);
02109         if (pi) pi--;
02110         tbl = &fs->win[MBR_Table + pi * SZ_PTE];/* Partition table */
02111         if (tbl[4]) {                       /* Is the partition existing? */
02112             bsect = LD_DWORD(&tbl[8]);      /* Partition offset in LBA */
02113             fmt = check_fs(fs, bsect);      /* Check the partition */
02114         }
02115     }
02116     if (fmt == 3) return FR_DISK_ERR;
02117     if (fmt) return FR_NO_FILESYSTEM;       /* No FAT volume is found */
02118 
02119     /* An FAT volume is found. Following code initializes the file system object */
02120 
02121     if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs))      /* (BPB_BytsPerSec must be equal to the physical sector size) */
02122         return FR_NO_FILESYSTEM;
02123 
02124     fasize = LD_WORD(fs->win+BPB_FATSz16);              /* Number of sectors per FAT */
02125     if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32);
02126     fs->fsize = fasize;
02127 
02128     fs->n_fats = b = fs->win[BPB_NumFATs];              /* Number of FAT copies */
02129     if (b != 1 && b != 2) return FR_NO_FILESYSTEM;      /* (Must be 1 or 2) */
02130     fasize *= b;                                        /* Number of sectors for FAT area */
02131 
02132     fs->csize = b = fs->win[BPB_SecPerClus];            /* Number of sectors per cluster */
02133     if (!b || (b & (b - 1))) return FR_NO_FILESYSTEM;   /* (Must be power of 2) */
02134 
02135     fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt);    /* Number of root directory entries */
02136     if (fs->n_rootdir % (SS(fs) / SZ_DIR)) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */
02137 
02138     tsect = LD_WORD(fs->win+BPB_TotSec16);              /* Number of sectors on the volume */
02139     if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
02140 
02141     nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt);             /* Number of reserved sectors */
02142     if (!nrsv) return FR_NO_FILESYSTEM;                 /* (BPB_RsvdSecCnt must not be 0) */
02143 
02144     /* Determine the FAT sub type */
02145     sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); /* RSV+FAT+DIR */
02146     if (tsect < sysect) return FR_NO_FILESYSTEM;        /* (Invalid volume size) */
02147     nclst = (tsect - sysect) / fs->csize;               /* Number of clusters */
02148     if (!nclst) return FR_NO_FILESYSTEM;                /* (Invalid volume size) */
02149     fmt = FS_FAT12;
02150     if (nclst >= MIN_FAT16) fmt = FS_FAT16;
02151     if (nclst >= MIN_FAT32) fmt = FS_FAT32;
02152 
02153     /* Boundaries and Limits */
02154     fs->n_fatent = nclst + 2;                           /* Number of FAT entries */
02155     fs->database = bsect + sysect;                      /* Data start sector */
02156     fs->fatbase = bsect + nrsv;                         /* FAT start sector */
02157     if (fmt == FS_FAT32) {
02158         if (fs->n_rootdir) return FR_NO_FILESYSTEM;     /* (BPB_RootEntCnt must be 0) */
02159         fs->dirbase = LD_DWORD(fs->win+BPB_RootClus);   /* Root directory start cluster */
02160         szbfat = fs->n_fatent * 4;                      /* (Required FAT size) */
02161     } else {
02162         if (!fs->n_rootdir) return FR_NO_FILESYSTEM;    /* (BPB_RootEntCnt must not be 0) */
02163         fs->dirbase = fs->fatbase + fasize;             /* Root directory start sector */
02164         szbfat = (fmt == FS_FAT16) ?                    /* (Required FAT size) */
02165             fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
02166     }
02167     if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs))   /* (BPB_FATSz must not be less than required) */
02168         return FR_NO_FILESYSTEM;
02169 
02170 #if !_FS_READONLY
02171     /* Initialize cluster allocation information */
02172     fs->free_clust = 0xFFFFFFFF;
02173     fs->last_clust = 0;
02174 
02175     /* Get fsinfo if available */
02176     if (fmt == FS_FAT32) {
02177         fs->fsi_flag = 0;
02178         fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
02179         if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK &&
02180             LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
02181             LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
02182             LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) {
02183                 fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
02184                 fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
02185         }
02186     }
02187 #endif
02188     fs->fs_type = fmt;      /* FAT sub-type */
02189     fs->id = ++Fsid;        /* File system mount ID */
02190     fs->winsect = 0;        /* Invalidate sector cache */
02191     fs->wflag = 0;
02192 #if _FS_RPATH
02193     fs->cdir = 0;           /* Current directory (root dir) */
02194 #endif
02195 #if _FS_LOCK                /* Clear file lock semaphores */
02196     clear_lock(fs);
02197 #endif
02198 
02199     return FR_OK;
02200 }
02201 
02202 
02203 
02204 
02205 /*-----------------------------------------------------------------------*/
02206 /* Check if the file/dir object is valid or not                          */
02207 /*-----------------------------------------------------------------------*/
02208 
02209 static
02210 FRESULT validate (  /* FR_OK(0): The object is valid, !=0: Invalid */
02211     void* obj       /* Pointer to the object FIL/DIR to check validity */
02212 )
02213 {
02214     FIL *fil;
02215 
02216 
02217     fil = (FIL*)obj;    /* Assuming offset of fs and id in the FIL/DIR is identical */
02218     if (!fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id)
02219         return FR_INVALID_OBJECT;
02220 
02221     ENTER_FF(fil->fs);      /* Lock file system */
02222 
02223     if (disk_status(fil->fs->drv) & STA_NOINIT)
02224         return FR_NOT_READY;
02225 
02226     return FR_OK;
02227 }
02228 
02229 
02230 
02231 
02232 /*--------------------------------------------------------------------------
02233 
02234    Public Functions
02235 
02236 --------------------------------------------------------------------------*/
02237 
02238 
02239 
02240 /*-----------------------------------------------------------------------*/
02241 /* Mount/Unmount a Logical Drive                                         */
02242 /*-----------------------------------------------------------------------*/
02243 
02244 FRESULT f_mount (
02245     BYTE vol,       /* Logical drive number to be mounted/unmounted */
02246     FATFS *fs       /* Pointer to new file system object (NULL for unmount)*/
02247 )
02248 {
02249     FATFS *rfs;
02250 
02251 
02252     if (vol >= _VOLUMES)        /* Check if the drive number is valid */
02253         return FR_INVALID_DRIVE;
02254     rfs = FatFs[vol];           /* Get current fs object */
02255 
02256     if (rfs) {
02257 #if _FS_LOCK
02258         clear_lock(rfs);
02259 #endif
02260 #if _FS_REENTRANT               /* Discard sync object of the current volume */
02261         if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR;
02262 #endif
02263         rfs->fs_type = 0;       /* Clear old fs object */
02264     }
02265 
02266     if (fs) {
02267         fs->fs_type = 0;        /* Clear new fs object */
02268 #if _FS_REENTRANT               /* Create sync object for the new volume */
02269         if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
02270 #endif
02271     }
02272     FatFs[vol] = fs;            /* Register new fs object */
02273 
02274     return FR_OK;
02275 }
02276 
02277 
02278 
02279 
02280 /*-----------------------------------------------------------------------*/
02281 /* Open or Create a File                                                 */
02282 /*-----------------------------------------------------------------------*/
02283 
02284 FRESULT f_open (
02285     FIL *fp,            /* Pointer to the blank file object */
02286     const TCHAR *path,  /* Pointer to the file name */
02287     BYTE mode           /* Access mode and file open mode flags */
02288 )
02289 {
02290     FRESULT res;
02291     FATFS_DIR dj;
02292     BYTE *dir;
02293     DEF_NAMEBUF;
02294 
02295 
02296     if (!fp) return FR_INVALID_OBJECT;
02297     fp->fs = 0;         /* Clear file object */
02298 
02299 #if !_FS_READONLY
02300     mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
02301     res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ));
02302 #else
02303     mode &= FA_READ;
02304     res = chk_mounted(&path, &dj.fs, 0);
02305 #endif
02306     if (res == FR_OK) {
02307         INIT_BUF(dj);
02308         res = follow_path(&dj, path);   /* Follow the file path */
02309         dir = dj.dir;
02310 #if !_FS_READONLY   /* R/W configuration */
02311         if (res == FR_OK) {
02312             if (!dir)   /* Current dir itself */
02313                 res = FR_INVALID_NAME;
02314 #if _FS_LOCK
02315             else
02316                 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
02317 #endif
02318         }
02319         /* Create or Open a file */
02320         if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
02321             DWORD dw, cl;
02322 
02323             if (res != FR_OK) {                 /* No file, create new */
02324                 if (res == FR_NO_FILE)          /* There is no file to open, create a new entry */
02325 #if _FS_LOCK
02326                     res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
02327 #else
02328                     res = dir_register(&dj);
02329 #endif
02330                 mode |= FA_CREATE_ALWAYS;       /* File is created */
02331                 dir = dj.dir;                   /* New entry */
02332             }
02333             else {                              /* Any object is already existing */
02334                 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) {    /* Cannot overwrite it (R/O or DIR) */
02335                     res = FR_DENIED;
02336                 } else {
02337                     if (mode & FA_CREATE_NEW)   /* Cannot create as new file */
02338                         res = FR_EXIST;
02339                 }
02340             }
02341             if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) {    /* Truncate it if overwrite mode */
02342                 dw = get_fattime();                 /* Created time */
02343                 ST_DWORD(dir+DIR_CrtTime, dw);
02344                 dir[DIR_Attr] = 0;                  /* Reset attribute */
02345                 ST_DWORD(dir+DIR_FileSize, 0);      /* size = 0 */
02346                 cl = ld_clust(dj.fs, dir);          /* Get start cluster */
02347                 st_clust(dir, 0);                   /* cluster = 0 */
02348                 dj.fs->wflag = 1;
02349                 if (cl) {                           /* Remove the cluster chain if exist */
02350                     dw = dj.fs->winsect;
02351                     res = remove_chain(dj.fs, cl);
02352                     if (res == FR_OK) {
02353                         dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
02354                         res = move_window(dj.fs, dw);
02355                     }
02356                 }
02357             }
02358         }
02359         else {  /* Open an existing file */
02360             if (res == FR_OK) {                     /* Follow succeeded */
02361                 if (dir[DIR_Attr] & AM_DIR) {       /* It is a directory */
02362                     res = FR_NO_FILE;
02363                 } else {
02364                     if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
02365                         res = FR_DENIED;
02366                 }
02367             }
02368         }
02369         if (res == FR_OK) {
02370             if (mode & FA_CREATE_ALWAYS)            /* Set file change flag if created or overwritten */
02371                 mode |= FA__WRITTEN;
02372             fp->dir_sect = dj.fs->winsect;          /* Pointer to the directory entry */
02373             fp->dir_ptr = dir;
02374 #if _FS_LOCK
02375             fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
02376             if (!fp->lockid) res = FR_INT_ERR;
02377 #endif
02378         }
02379 
02380 #else               /* R/O configuration */
02381         if (res == FR_OK) {                 /* Follow succeeded */
02382             dir = dj.dir;
02383             if (!dir) {                     /* Current dir itself */
02384                 res = FR_INVALID_NAME;
02385             } else {
02386                 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */
02387                     res = FR_NO_FILE;
02388             }
02389         }
02390 #endif
02391         FREE_BUF();
02392 
02393         if (res == FR_OK) {
02394             fp->flag = mode;                    /* File access mode */
02395             fp->sclust = ld_clust(dj.fs, dir);  /* File start cluster */
02396             fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
02397             fp->fptr = 0;                       /* File pointer */
02398             fp->dsect = 0;
02399 #if _USE_FASTSEEK
02400             fp->cltbl = 0;                      /* Normal seek mode */
02401 #endif
02402             fp->fs = dj.fs; fp->id = dj.fs->id; /* Validate file object */
02403         }
02404     }
02405 
02406     LEAVE_FF(dj.fs, res);
02407 }
02408 
02409 
02410 
02411 
02412 /*-----------------------------------------------------------------------*/
02413 /* Read File                                                             */
02414 /*-----------------------------------------------------------------------*/
02415 
02416 FRESULT f_read (
02417     FIL *fp,        /* Pointer to the file object */
02418     void *buff,     /* Pointer to data buffer */
02419     UINT btr,       /* Number of bytes to read */
02420     UINT *br        /* Pointer to number of bytes read */
02421 )
02422 {
02423     FRESULT res;
02424     DWORD clst, sect, remain;
02425     UINT rcnt, cc;
02426     BYTE csect, *rbuff = (BYTE *)buff;
02427 
02428 
02429     *br = 0;    /* Clear read byte counter */
02430 
02431     res = validate(fp);                         /* Check validity */
02432     if (res != FR_OK) LEAVE_FF(fp->fs, res);
02433     if (fp->flag & FA__ERROR)                   /* Aborted file? */
02434         LEAVE_FF(fp->fs, FR_INT_ERR);
02435     if (!(fp->flag & FA_READ))                  /* Check access mode */
02436         LEAVE_FF(fp->fs, FR_DENIED);
02437     remain = fp->fsize - fp->fptr;
02438     if (btr > remain) btr = (UINT)remain;       /* Truncate btr by remaining bytes */
02439 
02440     for ( ;  btr;                               /* Repeat until all data read */
02441         rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
02442         if ((fp->fptr % SS(fp->fs)) == 0) {     /* On the sector boundary? */
02443             csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1));    /* Sector offset in the cluster */
02444             if (!csect) {                       /* On the cluster boundary? */
02445                 if (fp->fptr == 0) {            /* On the top of the file? */
02446                     clst = fp->sclust;          /* Follow from the origin */
02447                 } else {                        /* Middle or end of the file */
02448 #if _USE_FASTSEEK
02449                     if (fp->cltbl)
02450                         clst = clmt_clust(fp, fp->fptr);    /* Get cluster# from the CLMT */
02451                     else
02452 #endif
02453                         clst = get_fat(fp->fs, fp->clust);  /* Follow cluster chain on the FAT */
02454                 }
02455                 if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
02456                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
02457                 fp->clust = clst;               /* Update current cluster */
02458             }
02459             sect = clust2sect(fp->fs, fp->clust);   /* Get current sector */
02460             if (!sect) ABORT(fp->fs, FR_INT_ERR);
02461             sect += csect;
02462             cc = btr / SS(fp->fs);              /* When remaining bytes >= sector size, */
02463             if (cc) {                           /* Read maximum contiguous sectors directly */
02464                 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
02465                     cc = fp->fs->csize - csect;
02466                 if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK)
02467                     ABORT(fp->fs, FR_DISK_ERR);
02468 #if !_FS_READONLY && _FS_MINIMIZE <= 2          /* Replace one of the read sectors with cached data if it contains a dirty sector */
02469 #if _FS_TINY
02470                 if (fp->fs->wflag && fp->fs->winsect - sect < cc)
02471                     mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
02472 #else
02473                 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
02474                     mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
02475 #endif
02476 #endif
02477                 rcnt = SS(fp->fs) * cc;         /* Number of bytes transferred */
02478                 continue;
02479             }
02480 #if !_FS_TINY
02481             if (fp->dsect != sect) {            /* Load data sector if not in cache */
02482 #if !_FS_READONLY
02483                 if (fp->flag & FA__DIRTY) {     /* Write-back dirty sector cache */
02484                     if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
02485                         ABORT(fp->fs, FR_DISK_ERR);
02486                     fp->flag &= ~FA__DIRTY;
02487                 }
02488 #endif
02489                 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */
02490                     ABORT(fp->fs, FR_DISK_ERR);
02491             }
02492 #endif
02493             fp->dsect = sect;
02494         }
02495         rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));  /* Get partial sector data from sector buffer */
02496         if (rcnt > btr) rcnt = btr;
02497 #if _FS_TINY
02498         if (move_window(fp->fs, fp->dsect))     /* Move sector window */
02499             ABORT(fp->fs, FR_DISK_ERR);
02500         mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt);  /* Pick partial sector */
02501 #else
02502         mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt);  /* Pick partial sector */
02503 #endif
02504     }
02505 
02506     LEAVE_FF(fp->fs, FR_OK);
02507 }
02508 
02509 
02510 
02511 
02512 #if !_FS_READONLY
02513 /*-----------------------------------------------------------------------*/
02514 /* Write File                                                            */
02515 /*-----------------------------------------------------------------------*/
02516 
02517 FRESULT f_write (
02518     FIL *fp,            /* Pointer to the file object */
02519     const void *buff,   /* Pointer to the data to be written */
02520     UINT btw,           /* Number of bytes to write */
02521     UINT *bw            /* Pointer to number of bytes written */
02522 )
02523 {
02524     FRESULT res;
02525     DWORD clst, sect;
02526     UINT wcnt, cc;
02527     const BYTE *wbuff = (const BYTE *)buff;
02528     BYTE csect;
02529 
02530 
02531     *bw = 0;    /* Clear write byte counter */
02532 
02533     res = validate(fp);                     /* Check validity */
02534     if (res != FR_OK) LEAVE_FF(fp->fs, res);
02535     if (fp->flag & FA__ERROR)               /* Aborted file? */
02536         LEAVE_FF(fp->fs, FR_INT_ERR);
02537     if (!(fp->flag & FA_WRITE))             /* Check access mode */
02538         LEAVE_FF(fp->fs, FR_DENIED);
02539     if ((DWORD)(fp->fsize + btw) < fp->fsize) btw = 0;  /* File size cannot reach 4GB */
02540 
02541     for ( ;  btw;                           /* Repeat until all data written */
02542         wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
02543         if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
02544             csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1));    /* Sector offset in the cluster */
02545             if (!csect) {                   /* On the cluster boundary? */
02546                 if (fp->fptr == 0) {        /* On the top of the file? */
02547                     clst = fp->sclust;      /* Follow from the origin */
02548                     if (clst == 0)          /* When no cluster is allocated, */
02549                         fp->sclust = clst = create_chain(fp->fs, 0);    /* Create a new cluster chain */
02550                 } else {                    /* Middle or end of the file */
02551 #if _USE_FASTSEEK
02552                     if (fp->cltbl)
02553                         clst = clmt_clust(fp, fp->fptr);    /* Get cluster# from the CLMT */
02554                     else
02555 #endif
02556                         clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */
02557                 }
02558                 if (clst == 0) break;       /* Could not allocate a new cluster (disk full) */
02559                 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
02560                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
02561                 fp->clust = clst;           /* Update current cluster */
02562             }
02563 #if _FS_TINY
02564             if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write-back sector cache */
02565                 ABORT(fp->fs, FR_DISK_ERR);
02566 #else
02567             if (fp->flag & FA__DIRTY) {     /* Write-back sector cache */
02568                 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
02569                     ABORT(fp->fs, FR_DISK_ERR);
02570                 fp->flag &= ~FA__DIRTY;
02571             }
02572 #endif
02573             sect = clust2sect(fp->fs, fp->clust);   /* Get current sector */
02574             if (!sect) ABORT(fp->fs, FR_INT_ERR);
02575             sect += csect;
02576             cc = btw / SS(fp->fs);          /* When remaining bytes >= sector size, */
02577             if (cc) {                       /* Write maximum contiguous sectors directly */
02578                 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
02579                     cc = fp->fs->csize - csect;
02580                 if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK)
02581                     ABORT(fp->fs, FR_DISK_ERR);
02582 #if _FS_TINY
02583                 if (fp->fs->winsect - sect < cc) {  /* Refill sector cache if it gets invalidated by the direct write */
02584                     mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
02585                     fp->fs->wflag = 0;
02586                 }
02587 #else
02588                 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
02589                     mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
02590                     fp->flag &= ~FA__DIRTY;
02591                 }
02592 #endif
02593                 wcnt = SS(fp->fs) * cc;     /* Number of bytes transferred */
02594                 continue;
02595             }
02596 #if _FS_TINY
02597             if (fp->fptr >= fp->fsize) {    /* Avoid silly cache filling at growing edge */
02598                 if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR);
02599                 fp->fs->winsect = sect;
02600             }
02601 #else
02602             if (fp->dsect != sect) {        /* Fill sector cache with file data */
02603                 if (fp->fptr < fp->fsize &&
02604                     disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
02605                         ABORT(fp->fs, FR_DISK_ERR);
02606             }
02607 #endif
02608             fp->dsect = sect;
02609         }
02610         wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
02611         if (wcnt > btw) wcnt = btw;
02612 #if _FS_TINY
02613         if (move_window(fp->fs, fp->dsect)) /* Move sector window */
02614             ABORT(fp->fs, FR_DISK_ERR);
02615         mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt);  /* Fit partial sector */
02616         fp->fs->wflag = 1;
02617 #else
02618         mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt);  /* Fit partial sector */
02619         fp->flag |= FA__DIRTY;
02620 #endif
02621     }
02622 
02623     if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
02624     fp->flag |= FA__WRITTEN;                        /* Set file change flag */
02625 
02626     LEAVE_FF(fp->fs, FR_OK);
02627 }
02628 
02629 
02630 
02631 
02632 /*-----------------------------------------------------------------------*/
02633 /* Synchronize the File Object                                           */
02634 /*-----------------------------------------------------------------------*/
02635 
02636 FRESULT f_sync (
02637     FIL *fp     /* Pointer to the file object */
02638 )
02639 {
02640     FRESULT res;
02641     DWORD tim;
02642     BYTE *dir;
02643 
02644 
02645     res = validate(fp);                 /* Check validity of the object */
02646     if (res == FR_OK) {
02647         if (fp->flag & FA__WRITTEN) {   /* Has the file been written? */
02648 #if !_FS_TINY   /* Write-back dirty buffer */
02649             if (fp->flag & FA__DIRTY) {
02650                 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
02651                     LEAVE_FF(fp->fs, FR_DISK_ERR);
02652                 fp->flag &= ~FA__DIRTY;
02653             }
02654 #endif
02655             /* Update the directory entry */
02656             res = move_window(fp->fs, fp->dir_sect);
02657             if (res == FR_OK) {
02658                 dir = fp->dir_ptr;
02659                 dir[DIR_Attr] |= AM_ARC;                    /* Set archive bit */
02660                 ST_DWORD(dir+DIR_FileSize, fp->fsize);      /* Update file size */
02661                 st_clust(dir, fp->sclust);                  /* Update start cluster */
02662                 tim = get_fattime();                        /* Update updated time */
02663                 ST_DWORD(dir+DIR_WrtTime, tim);
02664                 ST_WORD(dir+DIR_LstAccDate, 0);
02665                 fp->flag &= ~FA__WRITTEN;
02666                 fp->fs->wflag = 1;
02667                 res = sync(fp->fs);
02668             }
02669         }
02670     }
02671 
02672     LEAVE_FF(fp->fs, res);
02673 }
02674 
02675 #endif /* !_FS_READONLY */
02676 
02677 
02678 
02679 
02680 /*-----------------------------------------------------------------------*/
02681 /* Close File                                                            */
02682 /*-----------------------------------------------------------------------*/
02683 
02684 FRESULT f_close (
02685     FIL *fp     /* Pointer to the file object to be closed */
02686 )
02687 {
02688     FRESULT res;
02689 
02690 
02691 #if _FS_READONLY
02692     res = validate(fp);
02693     {
02694 #if _FS_REENTRANT
02695         FATFS *fs = fp->fs;
02696 #endif
02697         if (res == FR_OK) fp->fs = 0;   /* Discard file object */
02698         LEAVE_FF(fs, res);
02699     }
02700 #else
02701     res = f_sync(fp);       /* Flush cached data */
02702 #if _FS_LOCK
02703     if (res == FR_OK) {     /* Decrement open counter */
02704 #if _FS_REENTRANT
02705         FATFS *fs = fp->fs;;
02706         res = validate(fp);
02707         if (res == FR_OK) {
02708             res = dec_lock(fp->lockid);
02709             unlock_fs(fs, FR_OK);
02710         }
02711 #else
02712         res = dec_lock(fp->lockid);
02713 #endif
02714     }
02715 #endif
02716     if (res == FR_OK) fp->fs = 0;   /* Discard file object */
02717     return res;
02718 #endif
02719 }
02720 
02721 
02722 
02723 
02724 /*-----------------------------------------------------------------------*/
02725 /* Current Drive/Directory Handlings                                     */
02726 /*-----------------------------------------------------------------------*/
02727 
02728 #if _FS_RPATH >= 1
02729 
02730 FRESULT f_chdrive (
02731     BYTE drv        /* Drive number */
02732 )
02733 {
02734     if (drv >= _VOLUMES) return FR_INVALID_DRIVE;
02735 
02736     CurrVol = drv;
02737 
02738     return FR_OK;
02739 }
02740 
02741 
02742 
02743 FRESULT f_chdir (
02744     const TCHAR *path   /* Pointer to the directory path */
02745 )
02746 {
02747     FRESULT res;
02748     DIR dj;
02749     DEF_NAMEBUF;
02750 
02751 
02752     res = chk_mounted(&path, &dj.fs, 0);
02753     if (res == FR_OK) {
02754         INIT_BUF(dj);
02755         res = follow_path(&dj, path);       /* Follow the path */
02756         FREE_BUF();
02757         if (res == FR_OK) {                 /* Follow completed */
02758             if (!dj.dir) {
02759                 dj.fs->cdir = dj.sclust;    /* Start directory itself */
02760             } else {
02761                 if (dj.dir[DIR_Attr] & AM_DIR)  /* Reached to the directory */
02762                     dj.fs->cdir = ld_clust(dj.fs, dj.dir);
02763                 else
02764                     res = FR_NO_PATH;       /* Reached but a file */
02765             }
02766         }
02767         if (res == FR_NO_FILE) res = FR_NO_PATH;
02768     }
02769 
02770     LEAVE_FF(dj.fs, res);
02771 }
02772 
02773 
02774 #if _FS_RPATH >= 2
02775 FRESULT f_getcwd (
02776     TCHAR *path,    /* Pointer to the directory path */
02777     UINT sz_path    /* Size of path */
02778 )
02779 {
02780     FRESULT res;
02781     DIR dj;
02782     UINT i, n;
02783     DWORD ccl;
02784     TCHAR *tp;
02785     FILINFO fno;
02786     DEF_NAMEBUF;
02787 
02788 
02789     *path = 0;
02790     res = chk_mounted((const TCHAR**)&path, &dj.fs, 0); /* Get current volume */
02791     if (res == FR_OK) {
02792         INIT_BUF(dj);
02793         i = sz_path;        /* Bottom of buffer (dir stack base) */
02794         dj.sclust = dj.fs->cdir;            /* Start to follow upper dir from current dir */
02795         while ((ccl = dj.sclust) != 0) {    /* Repeat while current dir is a sub-dir */
02796             res = dir_sdi(&dj, 1);          /* Get parent dir */
02797             if (res != FR_OK) break;
02798             res = dir_read(&dj);
02799             if (res != FR_OK) break;
02800             dj.sclust = ld_clust(dj.fs, dj.dir);    /* Goto parent dir */
02801             res = dir_sdi(&dj, 0);
02802             if (res != FR_OK) break;
02803             do {                            /* Find the entry links to the child dir */
02804                 res = dir_read(&dj);
02805                 if (res != FR_OK) break;
02806                 if (ccl == ld_clust(dj.fs, dj.dir)) break;  /* Found the entry */
02807                 res = dir_next(&dj, 0);
02808             } while (res == FR_OK);
02809             if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
02810             if (res != FR_OK) break;
02811 #if _USE_LFN
02812             fno.lfname = path;
02813             fno.lfsize = i;
02814 #endif
02815             get_fileinfo(&dj, &fno);        /* Get the dir name and push it to the buffer */
02816             tp = fno.fname;
02817             if (_USE_LFN && *path) tp = path;
02818             for (n = 0; tp[n]; n++) ;
02819             if (i < n + 3) {
02820                 res = FR_NOT_ENOUGH_CORE; break;
02821             }
02822             while (n) path[--i] = tp[--n];
02823             path[--i] = '/';
02824         }
02825         tp = path;
02826         if (res == FR_OK) {
02827             *tp++ = '0' + CurrVol;          /* Put drive number */
02828             *tp++ = ':';
02829             if (i == sz_path) {             /* Root-dir */
02830                 *tp++ = '/';
02831             } else {                        /* Sub-dir */
02832                 do      /* Add stacked path str */
02833                     *tp++ = path[i++];
02834                 while (i < sz_path);
02835             }
02836         }
02837         *tp = 0;
02838         FREE_BUF();
02839     }
02840 
02841     LEAVE_FF(dj.fs, res);
02842 }
02843 #endif /* _FS_RPATH >= 2 */
02844 #endif /* _FS_RPATH >= 1 */
02845 
02846 
02847 
02848 #if _FS_MINIMIZE <= 2
02849 /*-----------------------------------------------------------------------*/
02850 /* Seek File R/W Pointer                                                 */
02851 /*-----------------------------------------------------------------------*/
02852 
02853 FRESULT f_lseek (
02854     FIL *fp,        /* Pointer to the file object */
02855     DWORD ofs       /* File pointer from top of file */
02856 )
02857 {
02858     FRESULT res;
02859 
02860 
02861     res = validate(fp);                 /* Check validity of the object */
02862     if (res != FR_OK) LEAVE_FF(fp->fs, res);
02863     if (fp->flag & FA__ERROR)           /* Check abort flag */
02864         LEAVE_FF(fp->fs, FR_INT_ERR);
02865 
02866 #if _USE_FASTSEEK
02867     if (fp->cltbl) {    /* Fast seek */
02868         DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
02869 
02870         if (ofs == CREATE_LINKMAP) {    /* Create CLMT */
02871             tbl = fp->cltbl;
02872             tlen = *tbl++; ulen = 2;    /* Given table size and required table size */
02873             cl = fp->sclust;            /* Top of the chain */
02874             if (cl) {
02875                 do {
02876                     /* Get a fragment */
02877                     tcl = cl; ncl = 0; ulen += 2;   /* Top, length and used items */
02878                     do {
02879                         pcl = cl; ncl++;
02880                         cl = get_fat(fp->fs, cl);
02881                         if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
02882                         if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
02883                     } while (cl == pcl + 1);
02884                     if (ulen <= tlen) {     /* Store the length and top of the fragment */
02885                         *tbl++ = ncl; *tbl++ = tcl;
02886                     }
02887                 } while (cl < fp->fs->n_fatent);    /* Repeat until end of chain */
02888             }
02889             *fp->cltbl = ulen;  /* Number of items used */
02890             if (ulen <= tlen)
02891                 *tbl = 0;       /* Terminate table */
02892             else
02893                 res = FR_NOT_ENOUGH_CORE;   /* Given table size is smaller than required */
02894 
02895         } else {                        /* Fast seek */
02896             if (ofs > fp->fsize)        /* Clip offset at the file size */
02897                 ofs = fp->fsize;
02898             fp->fptr = ofs;             /* Set file pointer */
02899             if (ofs) {
02900                 fp->clust = clmt_clust(fp, ofs - 1);
02901                 dsc = clust2sect(fp->fs, fp->clust);
02902                 if (!dsc) ABORT(fp->fs, FR_INT_ERR);
02903                 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
02904                 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) {    /* Refill sector cache if needed */
02905 #if !_FS_TINY
02906 #if !_FS_READONLY
02907                     if (fp->flag & FA__DIRTY) {     /* Write-back dirty sector cache */
02908                         if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
02909                             ABORT(fp->fs, FR_DISK_ERR);
02910                         fp->flag &= ~FA__DIRTY;
02911                     }
02912 #endif
02913                     if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK)  /* Load current sector */
02914                         ABORT(fp->fs, FR_DISK_ERR);
02915 #endif
02916                     fp->dsect = dsc;
02917                 }
02918             }
02919         }
02920     } else
02921 #endif
02922 
02923     /* Normal Seek */
02924     {
02925         DWORD clst, bcs, nsect, ifptr;
02926 
02927         if (ofs > fp->fsize                 /* In read-only mode, clip offset with the file size */
02928 #if !_FS_READONLY
02929              && !(fp->flag & FA_WRITE)
02930 #endif
02931             ) ofs = fp->fsize;
02932 
02933         ifptr = fp->fptr;
02934         fp->fptr = nsect = 0;
02935         if (ofs) {
02936             bcs = (DWORD)fp->fs->csize * SS(fp->fs);    /* Cluster size (byte) */
02937             if (ifptr > 0 &&
02938                 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
02939                 fp->fptr = (ifptr - 1) & ~(bcs - 1);    /* start from the current cluster */
02940                 ofs -= fp->fptr;
02941                 clst = fp->clust;
02942             } else {                                    /* When seek to back cluster, */
02943                 clst = fp->sclust;                      /* start from the first cluster */
02944 #if !_FS_READONLY
02945                 if (clst == 0) {                        /* If no cluster chain, create a new chain */
02946                     clst = create_chain(fp->fs, 0);
02947                     if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
02948                     if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
02949                     fp->sclust = clst;
02950                 }
02951 #endif
02952                 fp->clust = clst;
02953             }
02954             if (clst != 0) {
02955                 while (ofs > bcs) {                     /* Cluster following loop */
02956 #if !_FS_READONLY
02957                     if (fp->flag & FA_WRITE) {          /* Check if in write mode or not */
02958                         clst = create_chain(fp->fs, clst);  /* Force stretch if in write mode */
02959                         if (clst == 0) {                /* When disk gets full, clip file size */
02960                             ofs = bcs; break;
02961                         }
02962                     } else
02963 #endif
02964                         clst = get_fat(fp->fs, clst);   /* Follow cluster chain if not in write mode */
02965                     if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
02966                     if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
02967                     fp->clust = clst;
02968                     fp->fptr += bcs;
02969                     ofs -= bcs;
02970                 }
02971                 fp->fptr += ofs;
02972                 if (ofs % SS(fp->fs)) {
02973                     nsect = clust2sect(fp->fs, clst);   /* Current sector */
02974                     if (!nsect) ABORT(fp->fs, FR_INT_ERR);
02975                     nsect += ofs / SS(fp->fs);
02976                 }
02977             }
02978         }
02979         if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) {  /* Fill sector cache if needed */
02980 #if !_FS_TINY
02981 #if !_FS_READONLY
02982             if (fp->flag & FA__DIRTY) {         /* Write-back dirty sector cache */
02983                 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
02984                     ABORT(fp->fs, FR_DISK_ERR);
02985                 fp->flag &= ~FA__DIRTY;
02986             }
02987 #endif
02988             if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK)    /* Fill sector cache */
02989                 ABORT(fp->fs, FR_DISK_ERR);
02990 #endif
02991             fp->dsect = nsect;
02992         }
02993 #if !_FS_READONLY
02994         if (fp->fptr > fp->fsize) {         /* Set file change flag if the file size is extended */
02995             fp->fsize = fp->fptr;
02996             fp->flag |= FA__WRITTEN;
02997         }
02998 #endif
02999     }
03000 
03001     LEAVE_FF(fp->fs, res);
03002 }
03003 
03004 
03005 
03006 #if _FS_MINIMIZE <= 1
03007 /*-----------------------------------------------------------------------*/
03008 /* Create a Directory Object                                             */
03009 /*-----------------------------------------------------------------------*/
03010 
03011 FRESULT f_opendir (
03012     FATFS_DIR *dj,            /* Pointer to directory object to create */
03013     const TCHAR *path   /* Pointer to the directory path */
03014 )
03015 {
03016     FRESULT res;
03017     FATFS *fs;
03018     DEF_NAMEBUF;
03019 
03020 
03021     if (!dj) return FR_INVALID_OBJECT;
03022 
03023     res = chk_mounted(&path, &dj->fs, 0);
03024     fs = dj->fs;
03025     if (res == FR_OK) {
03026         INIT_BUF(*dj);
03027         res = follow_path(dj, path);            /* Follow the path to the directory */
03028         FREE_BUF();
03029         if (res == FR_OK) {                     /* Follow completed */
03030             if (dj->dir) {                      /* It is not the root dir */
03031                 if (dj->dir[DIR_Attr] & AM_DIR) {   /* The object is a directory */
03032                     dj->sclust = ld_clust(fs, dj->dir);
03033                 } else {                        /* The object is not a directory */
03034                     res = FR_NO_PATH;
03035                 }
03036             }
03037             if (res == FR_OK) {
03038                 dj->id = fs->id;
03039                 res = dir_sdi(dj, 0);           /* Rewind dir */
03040             }
03041         }
03042         if (res == FR_NO_FILE) res = FR_NO_PATH;
03043         if (res != FR_OK) dj->fs = 0;           /* Invalidate the dir object if function faild */
03044     } else {
03045         dj->fs = 0;
03046     }
03047 
03048     LEAVE_FF(fs, res);
03049 }
03050 
03051 
03052 
03053 
03054 /*-----------------------------------------------------------------------*/
03055 /* Read Directory Entry in Sequence                                      */
03056 /*-----------------------------------------------------------------------*/
03057 
03058 FRESULT f_readdir (
03059     FATFS_DIR *dj,            /* Pointer to the open directory object */
03060     FILINFO *fno        /* Pointer to file information to return */
03061 )
03062 {
03063     FRESULT res;
03064     DEF_NAMEBUF;
03065 
03066 
03067     res = validate(dj);                     /* Check validity of the object */
03068     if (res == FR_OK) {
03069         if (!fno) {
03070             res = dir_sdi(dj, 0);           /* Rewind the directory object */
03071         } else {
03072             INIT_BUF(*dj);
03073             res = dir_read(dj);             /* Read an directory item */
03074             if (res == FR_NO_FILE) {        /* Reached end of dir */
03075                 dj->sect = 0;
03076                 res = FR_OK;
03077             }
03078             if (res == FR_OK) {             /* A valid entry is found */
03079                 get_fileinfo(dj, fno);      /* Get the object information */
03080                 res = dir_next(dj, 0);      /* Increment index for next */
03081                 if (res == FR_NO_FILE) {
03082                     dj->sect = 0;
03083                     res = FR_OK;
03084                 }
03085             }
03086             FREE_BUF();
03087         }
03088     }
03089 
03090     LEAVE_FF(dj->fs, res);
03091 }
03092 
03093 
03094 
03095 #if _FS_MINIMIZE == 0
03096 /*-----------------------------------------------------------------------*/
03097 /* Get File Status                                                       */
03098 /*-----------------------------------------------------------------------*/
03099 
03100 FRESULT f_stat (
03101     const TCHAR *path,  /* Pointer to the file path */
03102     FILINFO *fno        /* Pointer to file information to return */
03103 )
03104 {
03105     FRESULT res;
03106     FATFS_DIR dj;
03107     DEF_NAMEBUF;
03108 
03109 
03110     res = chk_mounted(&path, &dj.fs, 0);
03111     if (res == FR_OK) {
03112         INIT_BUF(dj);
03113         res = follow_path(&dj, path);   /* Follow the file path */
03114         if (res == FR_OK) {             /* Follow completed */
03115             if (dj.dir)     /* Found an object */
03116                 get_fileinfo(&dj, fno);
03117             else            /* It is root dir */
03118                 res = FR_INVALID_NAME;
03119         }
03120         FREE_BUF();
03121     }
03122 
03123     LEAVE_FF(dj.fs, res);
03124 }
03125 
03126 
03127 
03128 #if !_FS_READONLY
03129 /*-----------------------------------------------------------------------*/
03130 /* Get Number of Free Clusters                                           */
03131 /*-----------------------------------------------------------------------*/
03132 
03133 FRESULT f_getfree (
03134     const TCHAR *path,  /* Pointer to the logical drive number (root dir) */
03135     DWORD *nclst,       /* Pointer to the variable to return number of free clusters */
03136     FATFS **fatfs       /* Pointer to pointer to corresponding file system object to return */
03137 )
03138 {
03139     FRESULT res;
03140     FATFS *fs;
03141     DWORD n, clst, sect, stat;
03142     UINT i;
03143     BYTE fat, *p;
03144 
03145 
03146     /* Get drive number */
03147     res = chk_mounted(&path, fatfs, 0);
03148     fs = *fatfs;
03149     if (res == FR_OK) {
03150         /* If free_clust is valid, return it without full cluster scan */
03151         if (fs->free_clust <= fs->n_fatent - 2) {
03152             *nclst = fs->free_clust;
03153         } else {
03154             /* Get number of free clusters */
03155             fat = fs->fs_type;
03156             n = 0;
03157             if (fat == FS_FAT12) {
03158                 clst = 2;
03159                 do {
03160                     stat = get_fat(fs, clst);
03161                     if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
03162                     if (stat == 1) { res = FR_INT_ERR; break; }
03163                     if (stat == 0) n++;
03164                 } while (++clst < fs->n_fatent);
03165             } else {
03166                 clst = fs->n_fatent;
03167                 sect = fs->fatbase;
03168                 i = 0; p = 0;
03169                 do {
03170                     if (!i) {
03171                         res = move_window(fs, sect++);
03172                         if (res != FR_OK) break;
03173                         p = fs->win;
03174                         i = SS(fs);
03175                     }
03176                     if (fat == FS_FAT16) {
03177                         if (LD_WORD(p) == 0) n++;
03178                         p += 2; i -= 2;
03179                     } else {
03180                         if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
03181                         p += 4; i -= 4;
03182                     }
03183                 } while (--clst);
03184             }
03185             fs->free_clust = n;
03186             if (fat == FS_FAT32) fs->fsi_flag = 1;
03187             *nclst = n;
03188         }
03189     }
03190     LEAVE_FF(fs, res);
03191 }
03192 
03193 
03194 
03195 
03196 /*-----------------------------------------------------------------------*/
03197 /* Truncate File                                                         */
03198 /*-----------------------------------------------------------------------*/
03199 
03200 FRESULT f_truncate (
03201     FIL *fp     /* Pointer to the file object */
03202 )
03203 {
03204     FRESULT res;
03205     DWORD ncl;
03206 
03207 
03208     if (!fp) return FR_INVALID_OBJECT;
03209 
03210     res = validate(fp);                     /* Check validity of the object */
03211     if (res == FR_OK) {
03212         if (fp->flag & FA__ERROR) {         /* Check abort flag */
03213             res = FR_INT_ERR;
03214         } else {
03215             if (!(fp->flag & FA_WRITE))     /* Check access mode */
03216                 res = FR_DENIED;
03217         }
03218     }
03219     if (res == FR_OK) {
03220         if (fp->fsize > fp->fptr) {
03221             fp->fsize = fp->fptr;   /* Set file size to current R/W point */
03222             fp->flag |= FA__WRITTEN;
03223             if (fp->fptr == 0) {    /* When set file size to zero, remove entire cluster chain */
03224                 res = remove_chain(fp->fs, fp->sclust);
03225                 fp->sclust = 0;
03226             } else {                /* When truncate a part of the file, remove remaining clusters */
03227                 ncl = get_fat(fp->fs, fp->clust);
03228                 res = FR_OK;
03229                 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
03230                 if (ncl == 1) res = FR_INT_ERR;
03231                 if (res == FR_OK && ncl < fp->fs->n_fatent) {
03232                     res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF);
03233                     if (res == FR_OK) res = remove_chain(fp->fs, ncl);
03234                 }
03235             }
03236         }
03237         if (res != FR_OK) fp->flag |= FA__ERROR;
03238     }
03239 
03240     LEAVE_FF(fp->fs, res);
03241 }
03242 
03243 
03244 
03245 
03246 /*-----------------------------------------------------------------------*/
03247 /* Delete a File or Directory                                            */
03248 /*-----------------------------------------------------------------------*/
03249 
03250 FRESULT f_unlink (
03251     const TCHAR *path       /* Pointer to the file or directory path */
03252 )
03253 {
03254     FRESULT res;
03255     FATFS_DIR dj, sdj;
03256     BYTE *dir;
03257     DWORD dclst;
03258     DEF_NAMEBUF;
03259 
03260 
03261     res = chk_mounted(&path, &dj.fs, 1);
03262     if (res == FR_OK) {
03263         INIT_BUF(dj);
03264         res = follow_path(&dj, path);       /* Follow the file path */
03265         if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
03266             res = FR_INVALID_NAME;          /* Cannot remove dot entry */
03267 #if _FS_LOCK
03268         if (res == FR_OK) res = chk_lock(&dj, 2);   /* Cannot remove open file */
03269 #endif
03270         if (res == FR_OK) {                 /* The object is accessible */
03271             dir = dj.dir;
03272             if (!dir) {
03273                 res = FR_INVALID_NAME;      /* Cannot remove the start directory */
03274             } else {
03275                 if (dir[DIR_Attr] & AM_RDO)
03276                     res = FR_DENIED;        /* Cannot remove R/O object */
03277             }
03278             dclst = ld_clust(dj.fs, dir);
03279             if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */
03280                 if (dclst < 2) {
03281                     res = FR_INT_ERR;
03282                 } else {
03283                     mem_cpy(&sdj, &dj, sizeof (FATFS_DIR));   /* Check if the sub-dir is empty or not */
03284                     sdj.sclust = dclst;
03285                     res = dir_sdi(&sdj, 2);     /* Exclude dot entries */
03286                     if (res == FR_OK) {
03287                         res = dir_read(&sdj);
03288                         if (res == FR_OK        /* Not empty dir */
03289 #if _FS_RPATH
03290                         || dclst == dj.fs->cdir /* Current dir */
03291 #endif
03292                         ) res = FR_DENIED;
03293                         if (res == FR_NO_FILE) res = FR_OK; /* Empty */
03294                     }
03295                 }
03296             }
03297             if (res == FR_OK) {
03298                 res = dir_remove(&dj);      /* Remove the directory entry */
03299                 if (res == FR_OK) {
03300                     if (dclst)              /* Remove the cluster chain if exist */
03301                         res = remove_chain(dj.fs, dclst);
03302                     if (res == FR_OK) res = sync(dj.fs);
03303                 }
03304             }
03305         }
03306         FREE_BUF();
03307     }
03308     LEAVE_FF(dj.fs, res);
03309 }
03310 
03311 
03312 
03313 
03314 /*-----------------------------------------------------------------------*/
03315 /* Create a Directory                                                    */
03316 /*-----------------------------------------------------------------------*/
03317 
03318 FRESULT f_mkdir (
03319     const TCHAR *path       /* Pointer to the directory path */
03320 )
03321 {
03322     FRESULT res;
03323     FATFS_DIR dj;
03324     BYTE *dir, n;
03325     DWORD dsc, dcl, pcl, tim = get_fattime();
03326     DEF_NAMEBUF;
03327 
03328 
03329     res = chk_mounted(&path, &dj.fs, 1);
03330     if (res == FR_OK) {
03331         INIT_BUF(dj);
03332         res = follow_path(&dj, path);           /* Follow the file path */
03333         if (res == FR_OK) res = FR_EXIST;       /* Any object with same name is already existing */
03334         if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT))
03335             res = FR_INVALID_NAME;
03336         if (res == FR_NO_FILE) {                /* Can create a new directory */
03337             dcl = create_chain(dj.fs, 0);       /* Allocate a cluster for the new directory table */
03338             res = FR_OK;
03339             if (dcl == 0) res = FR_DENIED;      /* No space to allocate a new cluster */
03340             if (dcl == 1) res = FR_INT_ERR;
03341             if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
03342             if (res == FR_OK)                   /* Flush FAT */
03343                 res = move_window(dj.fs, 0);
03344             if (res == FR_OK) {                 /* Initialize the new directory table */
03345                 dsc = clust2sect(dj.fs, dcl);
03346                 dir = dj.fs->win;
03347                 mem_set(dir, 0, SS(dj.fs));
03348                 mem_set(dir+DIR_Name, ' ', 8+3);    /* Create "." entry */
03349                 dir[DIR_Name] = '.';
03350                 dir[DIR_Attr] = AM_DIR;
03351                 ST_DWORD(dir+DIR_WrtTime, tim);
03352                 st_clust(dir, dcl);
03353                 mem_cpy(dir+SZ_DIR, dir, SZ_DIR);   /* Create ".." entry */
03354                 dir[33] = '.'; pcl = dj.sclust;
03355                 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
03356                     pcl = 0;
03357                 st_clust(dir+SZ_DIR, pcl);
03358                 for (n = dj.fs->csize; n; n--) {    /* Write dot entries and clear following sectors */
03359                     dj.fs->winsect = dsc++;
03360                     dj.fs->wflag = 1;
03361                     res = move_window(dj.fs, 0);
03362                     if (res != FR_OK) break;
03363                     mem_set(dir, 0, SS(dj.fs));
03364                 }
03365             }
03366             if (res == FR_OK) res = dir_register(&dj);  /* Register the object to the directoy */
03367             if (res != FR_OK) {
03368                 remove_chain(dj.fs, dcl);           /* Could not register, remove cluster chain */
03369             } else {
03370                 dir = dj.dir;
03371                 dir[DIR_Attr] = AM_DIR;             /* Attribute */
03372                 ST_DWORD(dir+DIR_WrtTime, tim);     /* Created time */
03373                 st_clust(dir, dcl);                 /* Table start cluster */
03374                 dj.fs->wflag = 1;
03375                 res = sync(dj.fs);
03376             }
03377         }
03378         FREE_BUF();
03379     }
03380 
03381     LEAVE_FF(dj.fs, res);
03382 }
03383 
03384 
03385 
03386 
03387 /*-----------------------------------------------------------------------*/
03388 /* Change Attribute                                                      */
03389 /*-----------------------------------------------------------------------*/
03390 
03391 FRESULT f_chmod (
03392     const TCHAR *path,  /* Pointer to the file path */
03393     BYTE value,         /* Attribute bits */
03394     BYTE mask           /* Attribute mask to change */
03395 )
03396 {
03397     FRESULT res;
03398     FATFS_DIR dj;
03399     BYTE *dir;
03400     DEF_NAMEBUF;
03401 
03402 
03403     res = chk_mounted(&path, &dj.fs, 1);
03404     if (res == FR_OK) {
03405         INIT_BUF(dj);
03406         res = follow_path(&dj, path);       /* Follow the file path */
03407         FREE_BUF();
03408         if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
03409             res = FR_INVALID_NAME;
03410         if (res == FR_OK) {
03411             dir = dj.dir;
03412             if (!dir) {                     /* Is it a root directory? */
03413                 res = FR_INVALID_NAME;
03414             } else {                        /* File or sub directory */
03415                 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC;    /* Valid attribute mask */
03416                 dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
03417                 dj.fs->wflag = 1;
03418                 res = sync(dj.fs);
03419             }
03420         }
03421     }
03422 
03423     LEAVE_FF(dj.fs, res);
03424 }
03425 
03426 
03427 
03428 
03429 /*-----------------------------------------------------------------------*/
03430 /* Change Timestamp                                                      */
03431 /*-----------------------------------------------------------------------*/
03432 
03433 FRESULT f_utime (
03434     const TCHAR *path,  /* Pointer to the file/directory name */
03435     const FILINFO *fno  /* Pointer to the time stamp to be set */
03436 )
03437 {
03438     FRESULT res;
03439     FATFS_DIR dj;
03440     BYTE *dir;
03441     DEF_NAMEBUF;
03442 
03443 
03444     res = chk_mounted(&path, &dj.fs, 1);
03445     if (res == FR_OK) {
03446         INIT_BUF(dj);
03447         res = follow_path(&dj, path);   /* Follow the file path */
03448         FREE_BUF();
03449         if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
03450             res = FR_INVALID_NAME;
03451         if (res == FR_OK) {
03452             dir = dj.dir;
03453             if (!dir) {                 /* Root directory */
03454                 res = FR_INVALID_NAME;
03455             } else {                    /* File or sub-directory */
03456                 ST_WORD(dir+DIR_WrtTime, fno->ftime);
03457                 ST_WORD(dir+DIR_WrtDate, fno->fdate);
03458                 dj.fs->wflag = 1;
03459                 res = sync(dj.fs);
03460             }
03461         }
03462     }
03463 
03464     LEAVE_FF(dj.fs, res);
03465 }
03466 
03467 
03468 
03469 
03470 /*-----------------------------------------------------------------------*/
03471 /* Rename File/Directory                                                 */
03472 /*-----------------------------------------------------------------------*/
03473 
03474 FRESULT f_rename (
03475     const TCHAR *path_old,  /* Pointer to the old name */
03476     const TCHAR *path_new   /* Pointer to the new name */
03477 )
03478 {
03479     FRESULT res;
03480     FATFS_DIR djo, djn;
03481     BYTE buf[21], *dir;
03482     DWORD dw;
03483     DEF_NAMEBUF;
03484 
03485 
03486     res = chk_mounted(&path_old, &djo.fs, 1);
03487     if (res == FR_OK) {
03488         djn.fs = djo.fs;
03489         INIT_BUF(djo);
03490         res = follow_path(&djo, path_old);      /* Check old object */
03491         if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT))
03492             res = FR_INVALID_NAME;
03493 #if _FS_LOCK
03494         if (res == FR_OK) res = chk_lock(&djo, 2);
03495 #endif
03496         if (res == FR_OK) {                     /* Old object is found */
03497             if (!djo.dir) {                     /* Is root dir? */
03498                 res = FR_NO_FILE;
03499             } else {
03500                 mem_cpy(buf, djo.dir+DIR_Attr, 21);     /* Save the object information except for name */
03501                 mem_cpy(&djn, &djo, sizeof (FATFS_DIR));      /* Check new object */
03502                 res = follow_path(&djn, path_new);
03503                 if (res == FR_OK) res = FR_EXIST;       /* The new object name is already existing */
03504                 if (res == FR_NO_FILE) {                /* Is it a valid path and no name collision? */
03505 /* Start critical section that an interruption or error can cause cross-link */
03506                     res = dir_register(&djn);           /* Register the new entry */
03507                     if (res == FR_OK) {
03508                         dir = djn.dir;                  /* Copy object information except for name */
03509                         mem_cpy(dir+13, buf+2, 19);
03510                         dir[DIR_Attr] = buf[0] | AM_ARC;
03511                         djo.fs->wflag = 1;
03512                         if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) {     /* Update .. entry in the directory if needed */
03513                             dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
03514                             if (!dw) {
03515                                 res = FR_INT_ERR;
03516                             } else {
03517                                 res = move_window(djo.fs, dw);
03518                                 dir = djo.fs->win+SZ_DIR;   /* .. entry */
03519                                 if (res == FR_OK && dir[1] == '.') {
03520                                     dw = (djo.fs->fs_type == FS_FAT32 && djn.sclust == djo.fs->dirbase) ? 0 : djn.sclust;
03521                                     st_clust(dir, dw);
03522                                     djo.fs->wflag = 1;
03523                                 }
03524                             }
03525                         }
03526                         if (res == FR_OK) {
03527                             res = dir_remove(&djo);     /* Remove old entry */
03528                             if (res == FR_OK)
03529                                 res = sync(djo.fs);
03530                         }
03531                     }
03532 /* End critical section */
03533                 }
03534             }
03535         }
03536         FREE_BUF();
03537     }
03538     LEAVE_FF(djo.fs, res);
03539 }
03540 
03541 #endif /* !_FS_READONLY */
03542 #endif /* _FS_MINIMIZE == 0 */
03543 #endif /* _FS_MINIMIZE <= 1 */
03544 #endif /* _FS_MINIMIZE <= 2 */
03545 
03546 
03547 
03548 /*-----------------------------------------------------------------------*/
03549 /* Forward data to the stream directly (available on only tiny cfg)      */
03550 /*-----------------------------------------------------------------------*/
03551 #if _USE_FORWARD && _FS_TINY
03552 
03553 FRESULT f_forward (
03554     FIL *fp,                        /* Pointer to the file object */
03555     UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
03556     UINT btr,                       /* Number of bytes to forward */
03557     UINT *bf                        /* Pointer to number of bytes forwarded */
03558 )
03559 {
03560     FRESULT res;
03561     DWORD remain, clst, sect;
03562     UINT rcnt;
03563     BYTE csect;
03564 
03565 
03566     *bf = 0;    /* Clear transfer byte counter */
03567 
03568     if (!fp) return FR_INVALID_OBJECT;
03569 
03570     res = validate(fp);                             /* Check validity of the object */
03571     if (res != FR_OK) LEAVE_FF(fp->fs, res);
03572     if (fp->flag & FA__ERROR)                       /* Check error flag */
03573         LEAVE_FF(fp->fs, FR_INT_ERR);
03574     if (!(fp->flag & FA_READ))                      /* Check access mode */
03575         LEAVE_FF(fp->fs, FR_DENIED);
03576 
03577     remain = fp->fsize - fp->fptr;
03578     if (btr > remain) btr = (UINT)remain;           /* Truncate btr by remaining bytes */
03579 
03580     for ( ;  btr && (*func)(0, 0);                  /* Repeat until all data transferred or stream becomes busy */
03581         fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) {
03582         csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1));    /* Sector offset in the cluster */
03583         if ((fp->fptr % SS(fp->fs)) == 0) {         /* On the sector boundary? */
03584             if (!csect) {                           /* On the cluster boundary? */
03585                 clst = (fp->fptr == 0) ?            /* On the top of the file? */
03586                     fp->sclust : get_fat(fp->fs, fp->clust);
03587                 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
03588                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
03589                 fp->clust = clst;                   /* Update current cluster */
03590             }
03591         }
03592         sect = clust2sect(fp->fs, fp->clust);       /* Get current data sector */
03593         if (!sect) ABORT(fp->fs, FR_INT_ERR);
03594         sect += csect;
03595         if (move_window(fp->fs, sect))              /* Move sector window */
03596             ABORT(fp->fs, FR_DISK_ERR);
03597         fp->dsect = sect;
03598         rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs));  /* Forward data from sector window */
03599         if (rcnt > btr) rcnt = btr;
03600         rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
03601         if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
03602     }
03603 
03604     LEAVE_FF(fp->fs, FR_OK);
03605 }
03606 #endif /* _USE_FORWARD */
03607 
03608 
03609 
03610 #if _USE_MKFS && !_FS_READONLY
03611 /*-----------------------------------------------------------------------*/
03612 /* Create File System on the Drive                                       */
03613 /*-----------------------------------------------------------------------*/
03614 #define N_ROOTDIR   512     /* Number of root dir entries for FAT12/16 */
03615 #define N_FATS      1       /* Number of FAT copies (1 or 2) */
03616 
03617 
03618 FRESULT f_mkfs (
03619     BYTE drv,       /* Logical drive number */
03620     BYTE sfd,       /* Partitioning rule 0:FDISK, 1:SFD */
03621     UINT au         /* Allocation unit size [bytes] */
03622 )
03623 {
03624     static const WORD vst[] = { 1024,   512,  256,  128,   64,    32,   16,    8,    4,    2,   0};
03625     static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
03626     BYTE fmt, md, sys, *tbl, pdrv, part;
03627     DWORD n_clst, vs, n, wsect;
03628     UINT i;
03629     DWORD b_vol, b_fat, b_dir, b_data;  /* LBA */
03630     DWORD n_vol, n_rsv, n_fat, n_dir;   /* Size */
03631     FATFS *fs;
03632     DSTATUS stat;
03633 
03634 
03635     /* Check mounted drive and clear work area */
03636     if (drv >= _VOLUMES) return FR_INVALID_DRIVE;
03637     if (sfd > 1) return FR_INVALID_PARAMETER;
03638     if (au & (au - 1)) return FR_INVALID_PARAMETER;
03639     fs = FatFs[drv];
03640     if (!fs) return FR_NOT_ENABLED;
03641     fs->fs_type = 0;
03642     pdrv = LD2PD(drv);  /* Physical drive */
03643     part = LD2PT(drv);  /* Partition (0:auto detect, 1-4:get from partition table)*/
03644 
03645     /* Get disk statics */
03646     stat = disk_initialize(pdrv);
03647     if (stat & STA_NOINIT) return FR_NOT_READY;
03648     if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
03649 #if _MAX_SS != 512                  /* Get disk sector size */
03650     if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS)
03651         return FR_DISK_ERR;
03652 #endif
03653     if (_MULTI_PARTITION && part) {
03654         /* Get partition information from partition table in the MBR */
03655         if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
03656         if (LD_WORD(fs->win+BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
03657         tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
03658         if (!tbl[4]) return FR_MKFS_ABORTED;    /* No partition? */
03659         b_vol = LD_DWORD(tbl+8);    /* Volume start sector */
03660         n_vol = LD_DWORD(tbl+12);   /* Volume size */
03661     } else {
03662         /* Create a partition in this function */
03663         if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128)
03664             return FR_DISK_ERR;
03665         b_vol = (sfd) ? 0 : 63;     /* Volume start sector */
03666         n_vol -= b_vol;             /* Volume size */
03667     }
03668 
03669     if (!au) {              /* AU auto selection */
03670         vs = n_vol / (2000 / (SS(fs) / 512));
03671         for (i = 0; vs < vst[i]; i++) ;
03672         au = cst[i];
03673     }
03674     au /= SS(fs);       /* Number of sectors per cluster */
03675     if (au == 0) au = 1;
03676     if (au > 128) au = 128;
03677 
03678     /* Pre-compute number of clusters and FAT sub-type */
03679     n_clst = n_vol / au;
03680     fmt = FS_FAT12;
03681     if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
03682     if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
03683 
03684     /* Determine offset and size of FAT structure */
03685     if (fmt == FS_FAT32) {
03686         n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
03687         n_rsv = 32;
03688         n_dir = 0;
03689     } else {
03690         n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
03691         n_fat = (n_fat + SS(fs) - 1) / SS(fs);
03692         n_rsv = 1;
03693         n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs);
03694     }
03695     b_fat = b_vol + n_rsv;              /* FAT area start sector */
03696     b_dir = b_fat + n_fat * N_FATS;     /* Directory area start sector */
03697     b_data = b_dir + n_dir;             /* Data area start sector */
03698     if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED;    /* Too small volume */
03699 
03700     /* Align data start sector to erase block boundary (for flash memory media) */
03701     if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1;
03702     n = (b_data + n - 1) & ~(n - 1);    /* Next nearest erase block from current data start */
03703     n = (n - b_data) / N_FATS;
03704     if (fmt == FS_FAT32) {      /* FAT32: Move FAT offset */
03705         n_rsv += n;
03706         b_fat += n;
03707     } else {                    /* FAT12/16: Expand FAT size */
03708         n_fat += n;
03709     }
03710 
03711     /* Determine number of clusters and final check of validity of the FAT sub-type */
03712     n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
03713     if (   (fmt == FS_FAT16 && n_clst < MIN_FAT16)
03714         || (fmt == FS_FAT32 && n_clst < MIN_FAT32))
03715         return FR_MKFS_ABORTED;
03716 
03717     switch (fmt) {  /* Determine system ID for partition table */
03718     case FS_FAT12:  sys = 0x01; break;
03719     case FS_FAT16:  sys = (n_vol < 0x10000) ? 0x04 : 0x06; break;
03720     default:        sys = 0x0C;
03721     }
03722 
03723     if (_MULTI_PARTITION && part) {
03724         /* Update system ID in the partition table */
03725         tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
03726         tbl[4] = sys;
03727         if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
03728         md = 0xF8;
03729     } else {
03730         if (sfd) {  /* No partition table (SFD) */
03731             md = 0xF0;
03732         } else {    /* Create partition table (FDISK) */
03733             mem_set(fs->win, 0, SS(fs));
03734             tbl = fs->win+MBR_Table;    /* Create partition table for single partition in the drive */
03735             tbl[1] = 1;                     /* Partition start head */
03736             tbl[2] = 1;                     /* Partition start sector */
03737             tbl[3] = 0;                     /* Partition start cylinder */
03738             tbl[4] = sys;                   /* System type */
03739             tbl[5] = 254;                   /* Partition end head */
03740             n = (b_vol + n_vol) / 63 / 255;
03741             tbl[6] = (BYTE)((n >> 2) | 63); /* Partition end sector */
03742             tbl[7] = (BYTE)n;               /* End cylinder */
03743             ST_DWORD(tbl+8, 63);            /* Partition start in LBA */
03744             ST_DWORD(tbl+12, n_vol);        /* Partition size in LBA */
03745             ST_WORD(fs->win+BS_55AA, 0xAA55);   /* MBR signature */
03746             if (disk_write(pdrv, fs->win, 0, 1) != RES_OK)  /* Write it to the MBR sector */
03747                 return FR_DISK_ERR;
03748             md = 0xF8;
03749         }
03750     }
03751 
03752     /* Create BPB in the VBR */
03753     tbl = fs->win;                          /* Clear sector */
03754     mem_set(tbl, 0, SS(fs));
03755     mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
03756     i = SS(fs);                             /* Sector size */
03757     ST_WORD(tbl+BPB_BytsPerSec, i);
03758     tbl[BPB_SecPerClus] = (BYTE)au;         /* Sectors per cluster */
03759     ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv);     /* Reserved sectors */
03760     tbl[BPB_NumFATs] = N_FATS;              /* Number of FATs */
03761     i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR;  /* Number of rootdir entries */
03762     ST_WORD(tbl+BPB_RootEntCnt, i);
03763     if (n_vol < 0x10000) {                  /* Number of total sectors */
03764         ST_WORD(tbl+BPB_TotSec16, n_vol);
03765     } else {
03766         ST_DWORD(tbl+BPB_TotSec32, n_vol);
03767     }
03768     tbl[BPB_Media] = md;                    /* Media descriptor */
03769     ST_WORD(tbl+BPB_SecPerTrk, 63);         /* Number of sectors per track */
03770     ST_WORD(tbl+BPB_NumHeads, 255);         /* Number of heads */
03771     ST_DWORD(tbl+BPB_HiddSec, b_vol);       /* Hidden sectors */
03772     n = get_fattime();                      /* Use current time as VSN */
03773     if (fmt == FS_FAT32) {
03774         ST_DWORD(tbl+BS_VolID32, n);        /* VSN */
03775         ST_DWORD(tbl+BPB_FATSz32, n_fat);   /* Number of sectors per FAT */
03776         ST_DWORD(tbl+BPB_RootClus, 2);      /* Root directory start cluster (2) */
03777         ST_WORD(tbl+BPB_FSInfo, 1);         /* FSInfo record offset (VBR+1) */
03778         ST_WORD(tbl+BPB_BkBootSec, 6);      /* Backup boot record offset (VBR+6) */
03779         tbl[BS_DrvNum32] = 0x80;            /* Drive number */
03780         tbl[BS_BootSig32] = 0x29;           /* Extended boot signature */
03781         mem_cpy(tbl+BS_VolLab32, "NO NAME    " "FAT32   ", 19); /* Volume label, FAT signature */
03782     } else {
03783         ST_DWORD(tbl+BS_VolID, n);          /* VSN */
03784         ST_WORD(tbl+BPB_FATSz16, n_fat);    /* Number of sectors per FAT */
03785         tbl[BS_DrvNum] = 0x80;              /* Drive number */
03786         tbl[BS_BootSig] = 0x29;             /* Extended boot signature */
03787         mem_cpy(tbl+BS_VolLab, "NO NAME    " "FAT     ", 19);   /* Volume label, FAT signature */
03788     }
03789     ST_WORD(tbl+BS_55AA, 0xAA55);           /* Signature (Offset is fixed here regardless of sector size) */
03790     if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK)  /* Write it to the VBR sector */
03791         return FR_DISK_ERR;
03792     if (fmt == FS_FAT32)                            /* Write backup VBR if needed (VBR+6) */
03793         disk_write(pdrv, tbl, b_vol + 6, 1);
03794 
03795     /* Initialize FAT area */
03796     wsect = b_fat;
03797     for (i = 0; i < N_FATS; i++) {      /* Initialize each FAT copy */
03798         mem_set(tbl, 0, SS(fs));            /* 1st sector of the FAT  */
03799         n = md;                             /* Media descriptor byte */
03800         if (fmt != FS_FAT32) {
03801             n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
03802             ST_DWORD(tbl+0, n);             /* Reserve cluster #0-1 (FAT12/16) */
03803         } else {
03804             n |= 0xFFFFFF00;
03805             ST_DWORD(tbl+0, n);             /* Reserve cluster #0-1 (FAT32) */
03806             ST_DWORD(tbl+4, 0xFFFFFFFF);
03807             ST_DWORD(tbl+8, 0x0FFFFFFF);    /* Reserve cluster #2 for root dir */
03808         }
03809         if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
03810             return FR_DISK_ERR;
03811         mem_set(tbl, 0, SS(fs));            /* Fill following FAT entries with zero */
03812         for (n = 1; n < n_fat; n++) {       /* This loop may take a time on FAT32 volume due to many single sector writes */
03813             if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
03814                 return FR_DISK_ERR;
03815         }
03816     }
03817 
03818     /* Initialize root directory */
03819     i = (fmt == FS_FAT32) ? au : n_dir;
03820     do {
03821         if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
03822             return FR_DISK_ERR;
03823     } while (--i);
03824 
03825 #if _USE_ERASE  /* Erase data area if needed */
03826     {
03827         DWORD eb[2];
03828 
03829         eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1;
03830         disk_ioctl(pdrv, CTRL_ERASE_SECTOR, eb);
03831     }
03832 #endif
03833 
03834     /* Create FSInfo if needed */
03835     if (fmt == FS_FAT32) {
03836         ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
03837         ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
03838         ST_DWORD(tbl+FSI_Free_Count, n_clst - 1);   /* Number of free clusters */
03839         ST_DWORD(tbl+FSI_Nxt_Free, 2);              /* Last allocated cluster# */
03840         ST_WORD(tbl+BS_55AA, 0xAA55);
03841         disk_write(pdrv, tbl, b_vol + 1, 1);    /* Write original (VBR+1) */
03842         disk_write(pdrv, tbl, b_vol + 7, 1);    /* Write backup (VBR+7) */
03843     }
03844 
03845     return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR;
03846 }
03847 
03848 
03849 #if _MULTI_PARTITION == 2
03850 /*-----------------------------------------------------------------------*/
03851 /* Divide Physical Drive                                                 */
03852 /*-----------------------------------------------------------------------*/
03853 
03854 FRESULT f_fdisk (
03855     BYTE pdrv,          /* Physical drive number */
03856     const DWORD szt[],  /* Pointer to the size table for each partitions */
03857     void* work          /* Pointer to the working buffer */
03858 )
03859 {
03860     UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
03861     BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
03862     DSTATUS stat;
03863     DWORD sz_disk, sz_part, s_part;
03864 
03865 
03866     stat = disk_initialize(pdrv);
03867     if (stat & STA_NOINIT) return FR_NOT_READY;
03868     if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
03869     if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
03870 
03871     /* Determine CHS in the table regardless of the drive geometry */
03872     for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
03873     if (n == 256) n--;
03874     e_hd = n - 1;
03875     sz_cyl = 63 * n;
03876     tot_cyl = sz_disk / sz_cyl;
03877 
03878     /* Create partition table */
03879     mem_set(buf, 0, _MAX_SS);
03880     p = buf + MBR_Table; b_cyl = 0;
03881     for (i = 0; i < 4; i++, p += SZ_PTE) {
03882         p_cyl = (szt[i] <= 100) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;
03883         if (!p_cyl) continue;
03884         s_part = (DWORD)sz_cyl * b_cyl;
03885         sz_part = (DWORD)sz_cyl * p_cyl;
03886         if (i == 0) {   /* Exclude first track of cylinder 0 */
03887             s_hd = 1;
03888             s_part += 63; sz_part -= 63;
03889         } else {
03890             s_hd = 0;
03891         }
03892         e_cyl = b_cyl + p_cyl - 1;
03893         if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
03894 
03895         /* Set partition table */
03896         p[1] = s_hd;                        /* Start head */
03897         p[2] = (BYTE)((b_cyl >> 2) + 1);    /* Start sector */
03898         p[3] = (BYTE)b_cyl;                 /* Start cylinder */
03899         p[4] = 0x06;                        /* System type (temporary setting) */
03900         p[5] = e_hd;                        /* End head */
03901         p[6] = (BYTE)((e_cyl >> 2) + 63);   /* End sector */
03902         p[7] = (BYTE)e_cyl;                 /* End cylinder */
03903         ST_DWORD(p + 8, s_part);            /* Start sector in LBA */
03904         ST_DWORD(p + 12, sz_part);          /* Partition size */
03905 
03906         /* Next partition */
03907         b_cyl += p_cyl;
03908     }
03909     ST_WORD(p, 0xAA55);
03910 
03911     /* Write it to the MBR */
03912     return (disk_write(pdrv, buf, 0, 1) || disk_ioctl(pdrv, CTRL_SYNC, 0)) ? FR_DISK_ERR : FR_OK;
03913 }
03914 
03915 
03916 #endif /* _MULTI_PARTITION == 2 */
03917 #endif /* _USE_MKFS && !_FS_READONLY */
03918 
03919 
03920 
03921 
03922 #if _USE_STRFUNC
03923 /*-----------------------------------------------------------------------*/
03924 /* Get a string from the file                                            */
03925 /*-----------------------------------------------------------------------*/
03926 TCHAR* f_gets (
03927     TCHAR* buff,    /* Pointer to the string buffer to read */
03928     int len,        /* Size of string buffer (characters) */
03929     FIL* fil        /* Pointer to the file object */
03930 )
03931 {
03932     int n = 0;
03933     TCHAR c, *p = buff;
03934     BYTE s[2];
03935     UINT rc;
03936 
03937 
03938     while (n < len - 1) {           /* Read bytes until buffer gets filled */
03939         f_read(fil, s, 1, &rc);
03940         if (rc != 1) break;         /* Break on EOF or error */
03941         c = s[0];
03942 #if _LFN_UNICODE                    /* Read a character in UTF-8 encoding */
03943         if (c >= 0x80) {
03944             if (c < 0xC0) continue; /* Skip stray trailer */
03945             if (c < 0xE0) {         /* Two-byte sequence */
03946                 f_read(fil, s, 1, &rc);
03947                 if (rc != 1) break;
03948                 c = ((c & 0x1F) << 6) | (s[0] & 0x3F);
03949                 if (c < 0x80) c = '?';
03950             } else {
03951                 if (c < 0xF0) {     /* Three-byte sequence */
03952                     f_read(fil, s, 2, &rc);
03953                     if (rc != 2) break;
03954                     c = (c << 12) | ((s[0] & 0x3F) << 6) | (s[1] & 0x3F);
03955                     if (c < 0x800) c = '?';
03956                 } else {            /* Reject four-byte sequence */
03957                     c = '?';
03958                 }
03959             }
03960         }
03961 #endif
03962 #if _USE_STRFUNC >= 2
03963         if (c == '\r') continue;    /* Strip '\r' */
03964 #endif
03965         *p++ = c;
03966         n++;
03967         if (c == '\n') break;       /* Break on EOL */
03968     }
03969     *p = 0;
03970     return n ? buff : 0;            /* When no data read (eof or error), return with error. */
03971 }
03972 
03973 
03974 
03975 #if !_FS_READONLY
03976 #include <stdarg.h>
03977 /*-----------------------------------------------------------------------*/
03978 /* Put a character to the file                                           */
03979 /*-----------------------------------------------------------------------*/
03980 int f_putc (
03981     TCHAR c,    /* A character to be output */
03982     FIL* fil    /* Pointer to the file object */
03983 )
03984 {
03985     UINT bw, btw;
03986     BYTE s[3];
03987 
03988 
03989 #if _USE_STRFUNC >= 2
03990     if (c == '\n') f_putc ('\r', fil);  /* LF -> CRLF conversion */
03991 #endif
03992 
03993 #if _LFN_UNICODE    /* Write the character in UTF-8 encoding */
03994     if (c < 0x80) {         /* 7-bit */
03995         s[0] = (BYTE)c;
03996         btw = 1;
03997     } else {
03998         if (c < 0x800) {    /* 11-bit */
03999             s[0] = (BYTE)(0xC0 | (c >> 6));
04000             s[1] = (BYTE)(0x80 | (c & 0x3F));
04001             btw = 2;
04002         } else {            /* 16-bit */
04003             s[0] = (BYTE)(0xE0 | (c >> 12));
04004             s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F));
04005             s[2] = (BYTE)(0x80 | (c & 0x3F));
04006             btw = 3;
04007         }
04008     }
04009 #else               /* Write the character without conversion */
04010     s[0] = (BYTE)c;
04011     btw = 1;
04012 #endif
04013     f_write(fil, s, btw, &bw);      /* Write the char to the file */
04014     return (bw == btw) ? 1 : EOF;   /* Return the result */
04015 }
04016 
04017 
04018 
04019 
04020 /*-----------------------------------------------------------------------*/
04021 /* Put a string to the file                                              */
04022 /*-----------------------------------------------------------------------*/
04023 int f_puts (
04024     const TCHAR* str,   /* Pointer to the string to be output */
04025     FIL* fil            /* Pointer to the file object */
04026 )
04027 {
04028     int n;
04029 
04030 
04031     for (n = 0; *str; str++, n++) {
04032         if (f_putc(*str, fil) == EOF) return EOF;
04033     }
04034     return n;
04035 }
04036 
04037 
04038 
04039 
04040 /*-----------------------------------------------------------------------*/
04041 /* Put a formatted string to the file                                    */
04042 /*-----------------------------------------------------------------------*/
04043 int f_printf (
04044     FIL* fil,           /* Pointer to the file object */
04045     const TCHAR* str,   /* Pointer to the format string */
04046     ...                 /* Optional arguments... */
04047 )
04048 {
04049     va_list arp;
04050     BYTE f, r;
04051     UINT i, j, w;
04052     ULONG v;
04053     TCHAR c, d, s[16], *p;
04054     int res, chc, cc;
04055 
04056 
04057     va_start(arp, str);
04058 
04059     for (cc = res = 0; cc != EOF; res += cc) {
04060         c = *str++;
04061         if (c == 0) break;          /* End of string */
04062         if (c != '%') {             /* Non escape character */
04063             cc = f_putc(c, fil);
04064             if (cc != EOF) cc = 1;
04065             continue;
04066         }
04067         w = f = 0;
04068         c = *str++;
04069         if (c == '0') {             /* Flag: '0' padding */
04070             f = 1; c = *str++;
04071         } else {
04072             if (c == '-') {         /* Flag: left justified */
04073                 f = 2; c = *str++;
04074             }
04075         }
04076         while (IsDigit(c)) {        /* Precision */
04077             w = w * 10 + c - '0';
04078             c = *str++;
04079         }
04080         if (c == 'l' || c == 'L') { /* Prefix: Size is long int */
04081             f |= 4; c = *str++;
04082         }
04083         if (!c) break;
04084         d = c;
04085         if (IsLower(d)) d -= 0x20;
04086         switch (d) {                /* Type is... */
04087         case 'S' :                  /* String */
04088             p = va_arg(arp, TCHAR*);
04089             for (j = 0; p[j]; j++) ;
04090             chc = 0;
04091             if (!(f & 2)) {
04092                 while (j++ < w) chc += (cc = f_putc(' ', fil));
04093             }
04094             chc += (cc = f_puts(p, fil));
04095             while (j++ < w) chc += (cc = f_putc(' ', fil));
04096             if (cc != EOF) cc = chc;
04097             continue;
04098         case 'C' :                  /* Character */
04099             cc = f_putc((TCHAR)va_arg(arp, int), fil); continue;
04100         case 'B' :                  /* Binary */
04101             r = 2; break;
04102         case 'O' :                  /* Octal */
04103             r = 8; break;
04104         case 'D' :                  /* Signed decimal */
04105         case 'U' :                  /* Unsigned decimal */
04106             r = 10; break;
04107         case 'X' :                  /* Hexdecimal */
04108             r = 16; break;
04109         default:                    /* Unknown type (pass-through) */
04110             cc = f_putc(c, fil); continue;
04111         }
04112 
04113         /* Get an argument and put it in numeral */
04114         v = (f & 4) ? (ULONG)va_arg(arp, long) : ((d == 'D') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int));
04115         if (d == 'D' && (v & 0x80000000)) {
04116             v = 0 - v;
04117             f |= 8;
04118         }
04119         i = 0;
04120         do {
04121             d = (TCHAR)(v % r); v /= r;
04122             if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
04123             s[i++] = d + '0';
04124         } while (v && i < sizeof s / sizeof s[0]);
04125         if (f & 8) s[i++] = '-';
04126         j = i; d = (f & 1) ? '0' : ' ';
04127         res = 0;
04128         while (!(f & 2) && j++ < w) res += (cc = f_putc(d, fil));
04129         do res += (cc = f_putc(s[--i], fil)); while(i);
04130         while (j++ < w) res += (cc = f_putc(' ', fil));
04131         if (cc != EOF) cc = res;
04132     }
04133 
04134     va_end(arp);
04135     return (cc == EOF) ? cc : res;
04136 }
04137 
04138 #endif /* !_FS_READONLY */
04139 #endif /* _USE_STRFUNC */