tmk_core/protocol/lufa/LUFA-git/Projects/Webserver/Lib/FATFs/ff.c

   1 /*----------------------------------------------------------------------------/
   2 /  FatFs - FAT file system module  R0.09a                 (C)ChaN, 2012
   3 /-----------------------------------------------------------------------------/
   4 / FatFs module is a generic FAT file system module for small embedded systems.
   5 / This is a free software that opened for education, research and commercial
   6 / developments under license policy of following terms.
   7 /
   8 /  Copyright (C) 2012, ChaN, all right reserved.
   9 /
  10 / * The FatFs module is a free software and there is NO WARRANTY.
  11 / * No restriction on use. You can use, modify and redistribute it for
  12 /   personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
  13 / * Redistributions of source code must retain the above copyright notice.
  14 /
  15 /-----------------------------------------------------------------------------/
  16 / Feb 26,'06 R0.00  Prototype.
  17 /
  18 / Apr 29,'06 R0.01  First stable version.
  19 /
  20 / Jun 01,'06 R0.02  Added FAT12 support.
  21 /                   Removed unbuffered mode.
  22 /                   Fixed a problem on small (<32M) partition.
  23 / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
  24 /
  25 / Sep 22,'06 R0.03  Added f_rename().
  26 /                   Changed option _FS_MINIMUM to _FS_MINIMIZE.
  27 / Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast.
  28 /                   Fixed f_mkdir() creates incorrect directory on FAT32.
  29 /
  30 / Feb 04,'07 R0.04  Supported multiple drive system.
  31 /                   Changed some interfaces for multiple drive system.
  32 /                   Changed f_mountdrv() to f_mount().
  33 /                   Added f_mkfs().
  34 / Apr 01,'07 R0.04a Supported multiple partitions on a physical drive.
  35 /                   Added a capability of extending file size to f_lseek().
  36 /                   Added minimization level 3.
  37 /                   Fixed an endian sensitive code in f_mkfs().
  38 / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
  39 /                   Added FSInfo support.
  40 /                   Fixed DBCS name can result FR_INVALID_NAME.
  41 /                   Fixed short seek (<= csize) collapses the file object.
  42 /
  43 / Aug 25,'07 R0.05  Changed arguments of f_read(), f_write() and f_mkfs().
  44 /                   Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
  45 /                   Fixed f_mkdir() on FAT32 creates incorrect directory.
  46 / Feb 03,'08 R0.05a Added f_truncate() and f_utime().
  47 /                   Fixed off by one error at FAT sub-type determination.
  48 /                   Fixed btr in f_read() can be mistruncated.
  49 /                   Fixed cached sector is not flushed when create and close without write.
  50 /
  51 / Apr 01,'08 R0.06  Added fputc(), fputs(), fprintf() and fgets().
  52 /                   Improved performance of f_lseek() on moving to the same or following cluster.
  53 /
  54 / Apr 01,'09 R0.07  Merged Tiny-FatFs as a configuration option. (_FS_TINY)
  55 /                   Added long file name feature.
  56 /                   Added multiple code page feature.
  57 /                   Added re-entrancy for multitask operation.
  58 /                   Added auto cluster size selection to f_mkfs().
  59 /                   Added rewind option to f_readdir().
  60 /                   Changed result code of critical errors.
  61 /                   Renamed string functions to avoid name collision.
  62 / Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
  63 /                   Added multiple sector size feature.
  64 / Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
  65 /                   Fixed wrong cache control in f_lseek().
  66 /                   Added relative path feature.
  67 /                   Added f_chdir() and f_chdrive().
  68 /                   Added proper case conversion to extended char.
  69 / Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
  70 /                   Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
  71 /                   Fixed name matching error on the 13 char boundary.
  72 /                   Added a configuration option, _LFN_UNICODE.
  73 /                   Changed f_readdir() to return the SFN with always upper case on non-LFN cfg.
  74 /
  75 / May 15,'10 R0.08  Added a memory configuration option. (_USE_LFN = 3)
  76 /                   Added file lock feature. (_FS_SHARE)
  77 /                   Added fast seek feature. (_USE_FASTSEEK)
  78 /                   Changed some types on the API, XCHAR->TCHAR.
  79 /                   Changed fname member in the FILINFO structure on Unicode cfg.
  80 /                   String functions support UTF-8 encoding files on Unicode cfg.
  81 / Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2)
  82 /                   Added sector erase feature. (_USE_ERASE)
  83 /                   Moved file lock semaphore table from fs object to the bss.
  84 /                   Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'.
  85 /                   Fixed f_mkfs() creates wrong FAT32 volume.
  86 / Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write().
  87 /                   f_lseek() reports required table size on creating CLMP.
  88 /                   Extended format syntax of f_printf function.
  89 /                   Ignores duplicated directory separators in given path name.
  90 /
  91 / Sep 06,'11 R0.09  f_mkfs() supports multiple partition to finish the multiple partition feature.
  92 /                   Added f_fdisk(). (_MULTI_PARTITION = 2)
  93 / Aug 27,'12 R0.09a Fixed assertion failure due to OS/2 EA on FAT12/16 volume.
  94 /                   Changed f_open() and f_opendir reject null object pointer to avoid crash.
  95 /                   Changed option name _FS_SHARE to _FS_LOCK.
  96 /---------------------------------------------------------------------------*/
  97
  98 #include "ff.h"                 /* FatFs configurations and declarations */
  99 #include "diskio.h"             /* Declarations of low level disk I/O functions */
 100
 101
 102 /*--------------------------------------------------------------------------
 103
 104    Module Private Definitions
 105
 106 ---------------------------------------------------------------------------*/
 107
 108 #if _FATFS != 4004      /* Revision ID */
 109 #error Wrong include file (ff.h).
 110 #endif
 111
 112
 113 /* Definitions on sector size */
 114 #if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096
 115 #error Wrong sector size.
 116 #endif
 117 #if _MAX_SS != 512
 118 #define SS(fs)  ((fs)->ssize)   /* Variable sector size */
 119 #else
 120 #define SS(fs)  512U                    /* Fixed sector size */
 121 #endif
 122
 123
 124 /* Reentrancy related */
 125 #if _FS_REENTRANT
 126 #if _USE_LFN == 1
 127 #error Static LFN work area must not be used in re-entrant configuration.
 128 #endif
 129 #define ENTER_FF(fs)            { if (!lock_fs(fs)) return FR_TIMEOUT; }
 130 #define LEAVE_FF(fs, res)       { unlock_fs(fs, res); return res; }
 131 #else
 132 #define ENTER_FF(fs)
 133 #define LEAVE_FF(fs, res)       return res
 134 #endif
 135
 136 #define ABORT(fs, res)          { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
 137
 138
 139 /* File access control feature */
 140 #if _FS_LOCK
 141 #if _FS_READONLY
 142 #error _FS_LOCK must be 0 on read-only cfg.
 143 #endif
 144 typedef struct {
 145         FATFS *fs;                              /* File ID 1, volume (NULL:blank entry) */
 146         DWORD clu;                              /* File ID 2, directory */
 147         WORD idx;                               /* File ID 3, directory index */
 148         WORD ctr;                               /* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */
 149 } FILESEM;
 150 #endif
 151
 152
 153
 154 /* DBCS code ranges and SBCS extend char conversion table */
 155
 156 #if _CODE_PAGE == 932   /* Japanese Shift-JIS */
 157 #define _DF1S   0x81    /* DBC 1st byte range 1 start */
 158 #define _DF1E   0x9F    /* DBC 1st byte range 1 end */
 159 #define _DF2S   0xE0    /* DBC 1st byte range 2 start */
 160 #define _DF2E   0xFC    /* DBC 1st byte range 2 end */
 161 #define _DS1S   0x40    /* DBC 2nd byte range 1 start */
 162 #define _DS1E   0x7E    /* DBC 2nd byte range 1 end */
 163 #define _DS2S   0x80    /* DBC 2nd byte range 2 start */
 164 #define _DS2E   0xFC    /* DBC 2nd byte range 2 end */
 165
 166 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
 167 #define _DF1S   0x81
 168 #define _DF1E   0xFE
 169 #define _DS1S   0x40
 170 #define _DS1E   0x7E
 171 #define _DS2S   0x80
 172 #define _DS2E   0xFE
 173
 174 #elif _CODE_PAGE == 949 /* Korean */
 175 #define _DF1S   0x81
 176 #define _DF1E   0xFE
 177 #define _DS1S   0x41
 178 #define _DS1E   0x5A
 179 #define _DS2S   0x61
 180 #define _DS2E   0x7A
 181 #define _DS3S   0x81
 182 #define _DS3E   0xFE
 183
 184 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
 185 #define _DF1S   0x81
 186 #define _DF1E   0xFE
 187 #define _DS1S   0x40
 188 #define _DS1E   0x7E
 189 #define _DS2S   0xA1
 190 #define _DS2E   0xFE
 191
 192 #elif _CODE_PAGE == 437 /* U.S. (OEM) */
 193 #define _DF1S   0
 194 #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, \
 195                                 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, \
 196                                 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, \
 197                                 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}
 198
 199 #elif _CODE_PAGE == 720 /* Arabic (OEM) */
 200 #define _DF1S   0
 201 #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, \
 202                                 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, \
 203                                 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, \
 204                                 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}
 205
 206 #elif _CODE_PAGE == 737 /* Greek (OEM) */
 207 #define _DF1S   0
 208 #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, \
 209                                 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, \
 210                                 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, \
 211                                 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}
 212
 213 #elif _CODE_PAGE == 775 /* Baltic (OEM) */
 214 #define _DF1S   0
 215 #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, \
 216                                 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, \
 217                                 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, \
 218                                 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}
 219
 220 #elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */
 221 #define _DF1S   0
 222 #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, \
 223                                 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, \
 224                                 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, \
 225                                 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}
 226
 227 #elif _CODE_PAGE == 852 /* Latin 2 (OEM) */
 228 #define _DF1S   0
 229 #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, \
 230                                 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, \
 231                                 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, \
 232                                 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}
 233
 234 #elif _CODE_PAGE == 855 /* Cyrillic (OEM) */
 235 #define _DF1S   0
 236 #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, \
 237                                 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, \
 238                                 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, \
 239                                 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}
 240
 241 #elif _CODE_PAGE == 857 /* Turkish (OEM) */
 242 #define _DF1S   0
 243 #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, \
 244                                 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, \
 245                                 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, \
 246                                 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}
 247
 248 #elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */
 249 #define _DF1S   0
 250 #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, \
 251                                 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, \
 252                                 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, \
 253                                 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}
 254
 255 #elif _CODE_PAGE == 862 /* Hebrew (OEM) */
 256 #define _DF1S   0
 257 #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, \
 258                                 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, \
 259                                 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, \
 260                                 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}
 261
 262 #elif _CODE_PAGE == 866 /* Russian (OEM) */
 263 #define _DF1S   0
 264 #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, \
 265                                 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, \
 266                                 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, \
 267                                 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}
 268
 269 #elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */
 270 #define _DF1S   0
 271 #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, \
 272                                 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, \
 273                                 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, \
 274                                 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}
 275
 276 #elif _CODE_PAGE == 1250 /* Central Europe (Windows) */
 277 #define _DF1S   0
 278 #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, \
 279                                 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, \
 280                                 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, \
 281                                 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}
 282
 283 #elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */
 284 #define _DF1S   0
 285 #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, \
 286                                 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, \
 287                                 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, \
 288                                 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}
 289
 290 #elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */
 291 #define _DF1S   0
 292 #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, \
 293                                 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, \
 294                                 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, \
 295                                 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}
 296
 297 #elif _CODE_PAGE == 1253 /* Greek (Windows) */
 298 #define _DF1S   0
 299 #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, \
 300                                 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, \
 301                                 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, \
 302                                 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}
 303
 304 #elif _CODE_PAGE == 1254 /* Turkish (Windows) */
 305 #define _DF1S   0
 306 #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, \
 307                                 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, \
 308                                 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, \
 309                                 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}
 310
 311 #elif _CODE_PAGE == 1255 /* Hebrew (Windows) */
 312 #define _DF1S   0
 313 #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, \
 314                                 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, \
 315                                 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, \
 316                                 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}
 317
 318 #elif _CODE_PAGE == 1256 /* Arabic (Windows) */
 319 #define _DF1S   0
 320 #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, \
 321                                 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, \
 322                                 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, \
 323                                 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}
 324
 325 #elif _CODE_PAGE == 1257 /* Baltic (Windows) */
 326 #define _DF1S   0
 327 #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, \
 328                                 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, \
 329                                 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, \
 330                                 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}
 331
 332 #elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */
 333 #define _DF1S   0
 334 #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, \
 335                                 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, \
 336                                 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, \
 337                                 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}
 338
 339 #elif _CODE_PAGE == 1   /* ASCII (for only non-LFN cfg) */
 340 #if _USE_LFN
 341 #error Cannot use LFN feature without valid code page.
 342 #endif
 343 #define _DF1S   0
 344
 345 #else
 346 #error Unknown code page
 347
 348 #endif
 349
 350
 351 /* Character code support macros */
 352 #define IsUpper(c)      (((c)>='A')&&((c)<='Z'))
 353 #define IsLower(c)      (((c)>='a')&&((c)<='z'))
 354 #define IsDigit(c)      (((c)>='0')&&((c)<='9'))
 355
 356 #if _DF1S               /* Code page is DBCS */
 357
 358 #ifdef _DF2S    /* Two 1st byte areas */
 359 #define IsDBCS1(c)      (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
 360 #else                   /* One 1st byte area */
 361 #define IsDBCS1(c)      ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
 362 #endif
 363
 364 #ifdef _DS3S    /* Three 2nd byte areas */
 365 #define IsDBCS2(c)      (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
 366 #else                   /* Two 2nd byte areas */
 367 #define IsDBCS2(c)      (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
 368 #endif
 369
 370 #else                   /* Code page is SBCS */
 371
 372 #define IsDBCS1(c)      0
 373 #define IsDBCS2(c)      0
 374
 375 #endif /* _DF1S */
 376
 377
 378 /* Name status flags */
 379 #define NS                      11              /* Index of name status byte in fn[] */
 380 #define NS_LOSS         0x01    /* Out of 8.3 format */
 381 #define NS_LFN          0x02    /* Force to create LFN entry */
 382 #define NS_LAST         0x04    /* Last segment */
 383 #define NS_BODY         0x08    /* Lower case flag (body) */
 384 #define NS_EXT          0x10    /* Lower case flag (ext) */
 385 #define NS_DOT          0x20    /* Dot entry */
 386
 387
 388 /* FAT sub-type boundaries */
 389 /* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */
 390 #define MIN_FAT16       4086    /* Minimum number of clusters for FAT16 */
 391 #define MIN_FAT32       65526   /* Minimum number of clusters for FAT32 */
 392
 393
 394 /* FatFs refers the members in the FAT structures as byte array instead of
 395 / structure member because the structure is not binary compatible between
 396 / different platforms */
 397
 398 #define BS_jmpBoot                      0       /* Jump instruction (3) */
 399 #define BS_OEMName                      3       /* OEM name (8) */
 400 #define BPB_BytsPerSec          11      /* Sector size [byte] (2) */
 401 #define BPB_SecPerClus          13      /* Cluster size [sector] (1) */
 402 #define BPB_RsvdSecCnt          14      /* Size of reserved area [sector] (2) */
 403 #define BPB_NumFATs                     16      /* Number of FAT copies (1) */
 404 #define BPB_RootEntCnt          17      /* Number of root dir entries for FAT12/16 (2) */
 405 #define BPB_TotSec16            19      /* Volume size [sector] (2) */
 406 #define BPB_Media                       21      /* Media descriptor (1) */
 407 #define BPB_FATSz16                     22      /* FAT size [sector] (2) */
 408 #define BPB_SecPerTrk           24      /* Track size [sector] (2) */
 409 #define BPB_NumHeads            26      /* Number of heads (2) */
 410 #define BPB_HiddSec                     28      /* Number of special hidden sectors (4) */
 411 #define BPB_TotSec32            32      /* Volume size [sector] (4) */
 412 #define BS_DrvNum                       36      /* Physical drive number (2) */
 413 #define BS_BootSig                      38      /* Extended boot signature (1) */
 414 #define BS_VolID                        39      /* Volume serial number (4) */
 415 #define BS_VolLab                       43      /* Volume label (8) */
 416 #define BS_FilSysType           54      /* File system type (1) */
 417 #define BPB_FATSz32                     36      /* FAT size [sector] (4) */
 418 #define BPB_ExtFlags            40      /* Extended flags (2) */
 419 #define BPB_FSVer                       42      /* File system version (2) */
 420 #define BPB_RootClus            44      /* Root dir first cluster (4) */
 421 #define BPB_FSInfo                      48      /* Offset of FSInfo sector (2) */
 422 #define BPB_BkBootSec           50      /* Offset of backup boot sector (2) */
 423 #define BS_DrvNum32                     64      /* Physical drive number (2) */
 424 #define BS_BootSig32            66      /* Extended boot signature (1) */
 425 #define BS_VolID32                      67      /* Volume serial number (4) */
 426 #define BS_VolLab32                     71      /* Volume label (8) */
 427 #define BS_FilSysType32         82      /* File system type (1) */
 428 #define FSI_LeadSig                     0       /* FSI: Leading signature (4) */
 429 #define FSI_StrucSig            484     /* FSI: Structure signature (4) */
 430 #define FSI_Free_Count          488     /* FSI: Number of free clusters (4) */
 431 #define FSI_Nxt_Free            492     /* FSI: Last allocated cluster (4) */
 432 #define MBR_Table                       446     /* MBR: Partition table offset (2) */
 433 #define SZ_PTE                          16      /* MBR: Size of a partition table entry */
 434 #define BS_55AA                         510     /* Boot sector signature (2) */
 435
 436 #define DIR_Name                        0       /* Short file name (11) */
 437 #define DIR_Attr                        11      /* Attribute (1) */
 438 #define DIR_NTres                       12      /* NT flag (1) */
 439 #define DIR_CrtTimeTenth        13      /* Created time sub-second (1) */
 440 #define DIR_CrtTime                     14      /* Created time (2) */
 441 #define DIR_CrtDate                     16      /* Created date (2) */
 442 #define DIR_LstAccDate          18      /* Last accessed date (2) */
 443 #define DIR_FstClusHI           20      /* Higher 16-bit of first cluster (2) */
 444 #define DIR_WrtTime                     22      /* Modified time (2) */
 445 #define DIR_WrtDate                     24      /* Modified date (2) */
 446 #define DIR_FstClusLO           26      /* Lower 16-bit of first cluster (2) */
 447 #define DIR_FileSize            28      /* File size (4) */
 448 #define LDIR_Ord                        0       /* LFN entry order and LLE flag (1) */
 449 #define LDIR_Attr                       11      /* LFN attribute (1) */
 450 #define LDIR_Type                       12      /* LFN type (1) */
 451 #define LDIR_Chksum                     13      /* Sum of corresponding SFN entry */
 452 #define LDIR_FstClusLO          26      /* Filled by zero (0) */
 453 #define SZ_DIR                          32              /* Size of a directory entry */
 454 #define LLE                                     0x40    /* Last long entry flag in LDIR_Ord */
 455 #define DDE                                     0xE5    /* Deleted directory entry mark in DIR_Name[0] */
 456 #define NDDE                            0x05    /* Replacement of the character collides with DDE */
 457
 458
 459 /*------------------------------------------------------------*/
 460 /* Module private work area                                   */
 461 /*------------------------------------------------------------*/
 462 /* Note that uninitialized variables with static duration are
 463 /  zeroed/nulled at start-up. If not, the compiler or start-up
 464 /  routine is out of ANSI-C standard.
 465 */
 466
 467 #if _VOLUMES
 468 static
 469 FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */
 470 #else
 471 #error Number of volumes must not be 0.
 472 #endif
 473
 474 static
 475 WORD Fsid;                              /* File system mount ID */
 476
 477 #if _FS_RPATH
 478 static
 479 BYTE CurrVol;                   /* Current drive */
 480 #endif
 481
 482 #if _FS_LOCK
 483 static
 484 FILESEM Files[_FS_LOCK];        /* File lock semaphores */
 485 #endif
 486
 487 #if _USE_LFN == 0                       /* No LFN feature */
 488 #define DEF_NAMEBUF                     BYTE sfn[12]
 489 #define INIT_BUF(dobj)          (dobj).fn = sfn
 490 #define FREE_BUF()
 491
 492 #elif _USE_LFN == 1                     /* LFN feature with static working buffer */
 493 static WCHAR LfnBuf[_MAX_LFN+1];
 494 #define DEF_NAMEBUF                     BYTE sfn[12]
 495 #define INIT_BUF(dobj)          { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
 496 #define FREE_BUF()
 497
 498 #elif _USE_LFN == 2             /* LFN feature with dynamic working buffer on the stack */
 499 #define DEF_NAMEBUF                     BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1]
 500 #define INIT_BUF(dobj)          { (dobj).fn = sfn; (dobj).lfn = lbuf; }
 501 #define FREE_BUF()
 502
 503 #elif _USE_LFN == 3             /* LFN feature with dynamic working buffer on the heap */
 504 #define DEF_NAMEBUF                     BYTE sfn[12]; WCHAR *lfn
 505 #define INIT_BUF(dobj)          { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \
 506                                                           if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \
 507                                                           (dobj).lfn = lfn;     (dobj).fn = sfn; }
 508 #define FREE_BUF()                      ff_memfree(lfn)
 509
 510 #else
 511 #error Wrong LFN configuration.
 512 #endif
 513
 514
 515
 516
 517 /*--------------------------------------------------------------------------
 518
 519    Module Private Functions
 520
 521 ---------------------------------------------------------------------------*/
 522
 523
 524 /*-----------------------------------------------------------------------*/
 525 /* String functions                                                      */
 526 /*-----------------------------------------------------------------------*/
 527
 528 /* Copy memory to memory */
 529 static
 530 void mem_cpy (void* dst, const void* src, UINT cnt) {
 531         BYTE *d = (BYTE*)dst;
 532         const BYTE *s = (const BYTE*)src;
 533
 534 #if _WORD_ACCESS == 1
 535         while (cnt >= sizeof (int)) {
 536                 *(int*)d = *(int*)s;
 537                 d += sizeof (int); s += sizeof (int);
 538                 cnt -= sizeof (int);
 539         }
 540 #endif
 541         while (cnt--)
 542                 *d++ = *s++;
 543 }
 544
 545 /* Fill memory */
 546 static
 547 void mem_set (void* dst, int val, UINT cnt) {
 548         BYTE *d = (BYTE*)dst;
 549
 550         while (cnt--)
 551                 *d++ = (BYTE)val;
 552 }
 553
 554 /* Compare memory to memory */
 555 static
 556 int mem_cmp (const void* dst, const void* src, UINT cnt) {
 557         const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
 558         int r = 0;
 559
 560         while (cnt-- && (r = *d++ - *s++) == 0) ;
 561         return r;
 562 }
 563
 564 /* Check if chr is contained in the string */
 565 static
 566 int chk_chr (const char* str, int chr) {
 567         while (*str && *str != chr) str++;
 568         return *str;
 569 }
 570
 571
 572
 573 /*-----------------------------------------------------------------------*/
 574 /* Request/Release grant to access the volume                            */
 575 /*-----------------------------------------------------------------------*/
 576 #if _FS_REENTRANT
 577
 578 static
 579 int lock_fs (
 580         FATFS *fs               /* File system object */
 581 )
 582 {
 583         return ff_req_grant(fs->sobj);
 584 }
 585
 586
 587 static
 588 void unlock_fs (
 589         FATFS *fs,              /* File system object */
 590         FRESULT res             /* Result code to be returned */
 591 )
 592 {
 593         if (fs &&
 594                 res != FR_NOT_ENABLED &&
 595                 res != FR_INVALID_DRIVE &&
 596                 res != FR_INVALID_OBJECT &&
 597                 res != FR_TIMEOUT) {
 598                 ff_rel_grant(fs->sobj);
 599         }
 600 }
 601 #endif
 602
 603
 604
 605 /*-----------------------------------------------------------------------*/
 606 /* File lock control functions                                           */
 607 /*-----------------------------------------------------------------------*/
 608 #if _FS_LOCK
 609
 610 static
 611 FRESULT chk_lock (      /* Check if the file can be accessed */
 612         DIR* dj,                /* Directory object pointing the file to be checked */
 613         int acc                 /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
 614 )
 615 {
 616         UINT i, be;
 617
 618         /* Search file semaphore table */
 619         for (i = be = 0; i < _FS_LOCK; i++) {
 620                 if (Files[i].fs) {      /* Existing entry */
 621                         if (Files[i].fs == dj->fs &&            /* Check if the file matched with an open file */
 622                                 Files[i].clu == dj->sclust &&
 623                                 Files[i].idx == dj->index) break;
 624                 } else {                        /* Blank entry */
 625                         be++;
 626                 }
 627         }
 628         if (i == _FS_LOCK)      /* The file is not opened */
 629                 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES;       /* Is there a blank entry for new file? */
 630
 631         /* The file has been opened. Reject any open against writing file and all write mode open */
 632         return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
 633 }
 634
 635
 636 static
 637 int enq_lock (void)     /* Check if an entry is available for a new file */
 638 {
 639         UINT i;
 640
 641         for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
 642         return (i == _FS_LOCK) ? 0 : 1;
 643 }
 644
 645
 646 static
 647 UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */
 648         DIR* dj,        /* Directory object pointing the file to register or increment */
 649         int acc         /* Desired access mode (0:Read, !0:Write) */
 650 )
 651 {
 652         UINT i;
 653
 654
 655         for (i = 0; i < _FS_LOCK; i++) {        /* Find the file */
 656                 if (Files[i].fs == dj->fs &&
 657                         Files[i].clu == dj->sclust &&
 658                         Files[i].idx == dj->index) break;
 659         }
 660
 661         if (i == _FS_LOCK) {                            /* Not opened. Register it as new. */
 662                 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
 663                 if (i == _FS_LOCK) return 0;    /* No space to register (int err) */
 664                 Files[i].fs = dj->fs;
 665                 Files[i].clu = dj->sclust;
 666                 Files[i].idx = dj->index;
 667                 Files[i].ctr = 0;
 668         }
 669
 670         if (acc && Files[i].ctr) return 0;      /* Access violation (int err) */
 671
 672         Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1;  /* Set semaphore value */
 673
 674         return i + 1;
 675 }
 676
 677
 678 static
 679 FRESULT dec_lock (      /* Decrement file open counter */
 680         UINT i                  /* Semaphore index */
 681 )
 682 {
 683         WORD n;
 684         FRESULT res;
 685
 686
 687         if (--i < _FS_LOCK) {
 688                 n = Files[i].ctr;
 689                 if (n == 0x100) n = 0;
 690                 if (n) n--;
 691                 Files[i].ctr = n;
 692                 if (!n) Files[i].fs = 0;
 693                 res = FR_OK;
 694         } else {
 695                 res = FR_INT_ERR;
 696         }
 697         return res;
 698 }
 699
 700
 701 static
 702 void clear_lock (       /* Clear lock entries of the volume */
 703         FATFS *fs
 704 )
 705 {
 706         UINT i;
 707
 708         for (i = 0; i < _FS_LOCK; i++) {
 709                 if (Files[i].fs == fs) Files[i].fs = 0;
 710         }
 711 }
 712 #endif
 713
 714
 715
 716 /*-----------------------------------------------------------------------*/
 717 /* Change window offset                                                  */
 718 /*-----------------------------------------------------------------------*/
 719
 720 static
 721 FRESULT move_window (
 722         FATFS *fs,              /* File system object */
 723         DWORD sector    /* Sector number to make appearance in the fs->win[] */
 724 )                                       /* Move to zero only writes back dirty window */
 725 {
 726         DWORD wsect;
 727
 728
 729         wsect = fs->winsect;
 730         if (wsect != sector) {  /* Changed current window */
 731 #if !_FS_READONLY
 732                 if (fs->wflag) {        /* Write back dirty window if needed */
 733                         if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK)
 734                                 return FR_DISK_ERR;
 735                         fs->wflag = 0;
 736                         if (wsect < (fs->fatbase + fs->fsize)) {        /* In FAT area */
 737                                 BYTE nf;
 738                                 for (nf = fs->n_fats; nf > 1; nf--) {   /* Reflect the change to all FAT copies */
 739                                         wsect += fs->fsize;
 740                                         disk_write(fs->drv, fs->win, wsect, 1);
 741                                 }
 742                         }
 743                 }
 744 #endif
 745                 if (sector) {
 746                         if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK)
 747                                 return FR_DISK_ERR;
 748                         fs->winsect = sector;
 749                 }
 750         }
 751
 752         return FR_OK;
 753 }
 754
 755
 756
 757
 758 /*-----------------------------------------------------------------------*/
 759 /* Clean-up cached data                                                  */
 760 /*-----------------------------------------------------------------------*/
 761 #if !_FS_READONLY
 762 static
 763 FRESULT sync (  /* FR_OK: successful, FR_DISK_ERR: failed */
 764         FATFS *fs       /* File system object */
 765 )
 766 {
 767         FRESULT res;
 768
 769
 770         res = move_window(fs, 0);
 771         if (res == FR_OK) {
 772                 /* Update FSInfo sector if needed */
 773                 if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
 774                         fs->winsect = 0;
 775                         /* Create FSInfo structure */
 776                         mem_set(fs->win, 0, 512);
 777                         ST_WORD(fs->win+BS_55AA, 0xAA55);
 778                         ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
 779                         ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
 780                         ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
 781                         ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
 782                         /* Write it into the FSInfo sector */
 783                         disk_write(fs->drv, fs->win, fs->fsi_sector, 1);
 784                         fs->fsi_flag = 0;
 785                 }
 786                 /* Make sure that no pending write process in the physical drive */
 787                 if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
 788                         res = FR_DISK_ERR;
 789         }
 790
 791         return res;
 792 }
 793 #endif
 794
 795
 796
 797
 798 /*-----------------------------------------------------------------------*/
 799 /* Get sector# from cluster#                                             */
 800 /*-----------------------------------------------------------------------*/
 801
 802
 803 DWORD clust2sect (      /* !=0: Sector number, 0: Failed - invalid cluster# */
 804         FATFS *fs,              /* File system object */
 805         DWORD clst              /* Cluster# to be converted */
 806 )
 807 {
 808         clst -= 2;
 809         if (clst >= (fs->n_fatent - 2)) return 0;               /* Invalid cluster# */
 810         return clst * fs->csize + fs->database;
 811 }
 812
 813
 814
 815
 816 /*-----------------------------------------------------------------------*/
 817 /* FAT access - Read value of a FAT entry                                */
 818 /*-----------------------------------------------------------------------*/
 819
 820
 821 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */
 822         FATFS *fs,      /* File system object */
 823         DWORD clst      /* Cluster# to get the link information */
 824 )
 825 {
 826         UINT wc, bc;
 827         BYTE *p;
 828
 829
 830         if (clst < 2 || clst >= fs->n_fatent)   /* Check range */
 831                 return 1;
 832
 833         switch (fs->fs_type) {
 834         case FS_FAT12 :
 835                 bc = (UINT)clst; bc += bc / 2;
 836                 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
 837                 wc = fs->win[bc % SS(fs)]; bc++;
 838                 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
 839                 wc |= fs->win[bc % SS(fs)] << 8;
 840                 return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
 841
 842         case FS_FAT16 :
 843                 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break;
 844                 p = &fs->win[clst * 2 % SS(fs)];
 845                 return LD_WORD(p);
 846
 847         case FS_FAT32 :
 848                 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break;
 849                 p = &fs->win[clst * 4 % SS(fs)];
 850                 return LD_DWORD(p) & 0x0FFFFFFF;
 851         }
 852
 853         return 0xFFFFFFFF;      /* An error occurred at the disk I/O layer */
 854 }
 855
 856
 857
 858
 859 /*-----------------------------------------------------------------------*/
 860 /* FAT access - Change value of a FAT entry                              */
 861 /*-----------------------------------------------------------------------*/
 862 #if !_FS_READONLY
 863
 864 FRESULT put_fat (
 865         FATFS *fs,      /* File system object */
 866         DWORD clst,     /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */
 867         DWORD val       /* New value to mark the cluster */
 868 )
 869 {
 870         UINT bc;
 871         BYTE *p;
 872         FRESULT res;
 873
 874
 875         if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
 876                 res = FR_INT_ERR;
 877
 878         } else {
 879                 switch (fs->fs_type) {
 880                 case FS_FAT12 :
 881                         bc = (UINT)clst; bc += bc / 2;
 882                         res = move_window(fs, fs->fatbase + (bc / SS(fs)));
 883                         if (res != FR_OK) break;
 884                         p = &fs->win[bc % SS(fs)];
 885                         *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
 886                         bc++;
 887                         fs->wflag = 1;
 888                         res = move_window(fs, fs->fatbase + (bc / SS(fs)));
 889                         if (res != FR_OK) break;
 890                         p = &fs->win[bc % SS(fs)];
 891                         *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
 892                         break;
 893
 894                 case FS_FAT16 :
 895                         res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
 896                         if (res != FR_OK) break;
 897                         p = &fs->win[clst * 2 % SS(fs)];
 898                         ST_WORD(p, (WORD)val);
 899                         break;
 900
 901                 case FS_FAT32 :
 902                         res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
 903                         if (res != FR_OK) break;
 904                         p = &fs->win[clst * 4 % SS(fs)];
 905                         val |= LD_DWORD(p) & 0xF0000000;
 906                         ST_DWORD(p, val);
 907                         break;
 908
 909                 default :
 910                         res = FR_INT_ERR;
 911                 }
 912                 fs->wflag = 1;
 913         }
 914
 915         return res;
 916 }
 917 #endif /* !_FS_READONLY */
 918
 919
 920
 921
 922 /*-----------------------------------------------------------------------*/
 923 /* FAT handling - Remove a cluster chain                                 */
 924 /*-----------------------------------------------------------------------*/
 925 #if !_FS_READONLY
 926 static
 927 FRESULT remove_chain (
 928         FATFS *fs,                      /* File system object */
 929         DWORD clst                      /* Cluster# to remove a chain from */
 930 )
 931 {
 932         FRESULT res;
 933         DWORD nxt;
 934 #if _USE_ERASE
 935         DWORD scl = clst, ecl = clst, rt[2];
 936 #endif
 937
 938         if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
 939                 res = FR_INT_ERR;
 940
 941         } else {
 942                 res = FR_OK;
 943                 while (clst < fs->n_fatent) {                   /* Not a last link? */
 944                         nxt = get_fat(fs, clst);                        /* Get cluster status */
 945                         if (nxt == 0) break;                            /* Empty cluster? */
 946                         if (nxt == 1) { res = FR_INT_ERR; break; }      /* Internal error? */
 947                         if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }    /* Disk error? */
 948                         res = put_fat(fs, clst, 0);                     /* Mark the cluster "empty" */
 949                         if (res != FR_OK) break;
 950                         if (fs->free_clust != 0xFFFFFFFF) {     /* Update FSInfo */
 951                                 fs->free_clust++;
 952                                 fs->fsi_flag = 1;
 953                         }
 954 #if _USE_ERASE
 955                         if (ecl + 1 == nxt) {   /* Is next cluster contiguous? */
 956                                 ecl = nxt;
 957                         } else {                                /* End of contiguous clusters */
 958                                 rt[0] = clust2sect(fs, scl);                                    /* Start sector */
 959                                 rt[1] = clust2sect(fs, ecl) + fs->csize - 1;    /* End sector */
 960                                 disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, rt);             /* Erase the block */
 961                                 scl = ecl = nxt;
 962                         }
 963 #endif
 964                         clst = nxt;     /* Next cluster */
 965                 }
 966         }
 967
 968         return res;
 969 }
 970 #endif
 971
 972
 973
 974
 975 /*-----------------------------------------------------------------------*/
 976 /* FAT handling - Stretch or Create a cluster chain                      */
 977 /*-----------------------------------------------------------------------*/
 978 #if !_FS_READONLY
 979 static
 980 DWORD create_chain (    /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
 981         FATFS *fs,                      /* File system object */
 982         DWORD clst                      /* Cluster# to stretch. 0 means create a new chain. */
 983 )
 984 {
 985         DWORD cs, ncl, scl;
 986         FRESULT res;
 987
 988
 989         if (clst == 0) {                /* Create a new chain */
 990                 scl = fs->last_clust;                   /* Get suggested start point */
 991                 if (!scl || scl >= fs->n_fatent) scl = 1;
 992         }
 993         else {                                  /* Stretch the current chain */
 994                 cs = get_fat(fs, clst);                 /* Check the cluster status */
 995                 if (cs < 2) return 1;                   /* It is an invalid cluster */
 996                 if (cs < fs->n_fatent) return cs;       /* It is already followed by next cluster */
 997                 scl = clst;
 998         }
 999
1000         ncl = scl;                              /* Start cluster */
1001         for (;;) {
1002                 ncl++;                                                  /* Next cluster */
1003                 if (ncl >= fs->n_fatent) {              /* Wrap around */
1004                         ncl = 2;
1005                         if (ncl > scl) return 0;        /* No free cluster */
1006                 }
1007                 cs = get_fat(fs, ncl);                  /* Get the cluster status */
1008                 if (cs == 0) break;                             /* Found a free cluster */
1009                 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */
1010                         return cs;
1011                 if (ncl == scl) return 0;               /* No free cluster */
1012         }
1013
1014         res = put_fat(fs, ncl, 0x0FFFFFFF);     /* Mark the new cluster "last link" */
1015         if (res == FR_OK && clst != 0) {
1016                 res = put_fat(fs, clst, ncl);   /* Link it to the previous one if needed */
1017         }
1018         if (res == FR_OK) {
1019                 fs->last_clust = ncl;                   /* Update FSINFO */
1020                 if (fs->free_clust != 0xFFFFFFFF) {
1021                         fs->free_clust--;
1022                         fs->fsi_flag = 1;
1023                 }
1024         } else {
1025                 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
1026         }
1027
1028         return ncl;             /* Return new cluster number or error code */
1029 }
1030 #endif /* !_FS_READONLY */
1031
1032
1033
1034 /*-----------------------------------------------------------------------*/
1035 /* FAT handling - Convert offset into cluster with link map table        */
1036 /*-----------------------------------------------------------------------*/
1037
1038 #if _USE_FASTSEEK
1039 static
1040 DWORD clmt_clust (      /* <2:Error, >=2:Cluster number */
1041         FIL* fp,                /* Pointer to the file object */
1042         DWORD ofs               /* File offset to be converted to cluster# */
1043 )
1044 {
1045         DWORD cl, ncl, *tbl;
1046
1047
1048         tbl = fp->cltbl + 1;    /* Top of CLMT */
1049         cl = ofs / SS(fp->fs) / fp->fs->csize;  /* Cluster order from top of the file */
1050         for (;;) {
1051                 ncl = *tbl++;                   /* Number of cluters in the fragment */
1052                 if (!ncl) return 0;             /* End of table? (error) */
1053                 if (cl < ncl) break;    /* In this fragment? */
1054                 cl -= ncl; tbl++;               /* Next fragment */
1055         }
1056         return cl + *tbl;       /* Return the cluster number */
1057 }
1058 #endif  /* _USE_FASTSEEK */
1059
1060
1061
1062 /*-----------------------------------------------------------------------*/
1063 /* Directory handling - Set directory index                              */
1064 /*-----------------------------------------------------------------------*/
1065
1066 static
1067 FRESULT dir_sdi (
1068         DIR *dj,                /* Pointer to directory object */
1069         WORD idx                /* Index of directory table */
1070 )
1071 {
1072         DWORD clst;
1073         WORD ic;
1074
1075
1076         dj->index = idx;
1077         clst = dj->sclust;
1078         if (clst == 1 || clst >= dj->fs->n_fatent)      /* Check start cluster range */
1079                 return FR_INT_ERR;
1080         if (!clst && dj->fs->fs_type == FS_FAT32)       /* Replace cluster# 0 with root cluster# if in FAT32 */
1081                 clst = dj->fs->dirbase;
1082
1083         if (clst == 0) {        /* Static table (root-dir in FAT12/16) */
1084                 dj->clust = clst;
1085                 if (idx >= dj->fs->n_rootdir)           /* Index is out of range */
1086                         return FR_INT_ERR;
1087                 dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR);       /* Sector# */
1088         }
1089         else {                          /* Dynamic table (sub-dirs or root-dir in FAT32) */
1090                 ic = SS(dj->fs) / SZ_DIR * dj->fs->csize;       /* Entries per cluster */
1091                 while (idx >= ic) {     /* Follow cluster chain */
1092                         clst = get_fat(dj->fs, clst);                           /* Get next cluster */
1093                         if (clst == 0xFFFFFFFF) return FR_DISK_ERR;     /* Disk error */
1094                         if (clst < 2 || clst >= dj->fs->n_fatent)       /* Reached to end of table or int error */
1095                                 return FR_INT_ERR;
1096                         idx -= ic;
1097                 }
1098                 dj->clust = clst;
1099                 dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR);      /* Sector# */
1100         }
1101
1102         dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */
1103
1104         return FR_OK;   /* Seek succeeded */
1105 }
1106
1107
1108
1109
1110 /*-----------------------------------------------------------------------*/
1111 /* Directory handling - Move directory table index next                  */
1112 /*-----------------------------------------------------------------------*/
1113
1114 static
1115 FRESULT dir_next (      /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */
1116         DIR *dj,                /* Pointer to directory object */
1117         int stretch             /* 0: Do not stretch table, 1: Stretch table if needed */
1118 )
1119 {
1120         DWORD clst;
1121         WORD i;
1122
1123
1124         stretch = stretch;              /* To suppress warning on read-only cfg. */
1125         i = dj->index + 1;
1126         if (!i || !dj->sect)    /* Report EOT when index has reached 65535 */
1127                 return FR_NO_FILE;
1128
1129         if (!(i % (SS(dj->fs) / SZ_DIR))) {     /* Sector changed? */
1130                 dj->sect++;                                     /* Next sector */
1131
1132                 if (dj->clust == 0) {   /* Static table */
1133                         if (i >= dj->fs->n_rootdir)     /* Report EOT when end of table */
1134                                 return FR_NO_FILE;
1135                 }
1136                 else {                                  /* Dynamic table */
1137                         if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
1138                                 clst = get_fat(dj->fs, dj->clust);                              /* Get next cluster */
1139                                 if (clst <= 1) return FR_INT_ERR;
1140                                 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1141                                 if (clst >= dj->fs->n_fatent) {                                 /* When it reached end of dynamic table */
1142 #if !_FS_READONLY
1143                                         BYTE c;
1144                                         if (!stretch) return FR_NO_FILE;                        /* When do not stretch, report EOT */
1145                                         clst = create_chain(dj->fs, dj->clust);         /* Stretch cluster chain */
1146                                         if (clst == 0) return FR_DENIED;                        /* No free cluster */
1147                                         if (clst == 1) return FR_INT_ERR;
1148                                         if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1149                                         /* Clean-up stretched table */
1150                                         if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */
1151                                         mem_set(dj->fs->win, 0, SS(dj->fs));                    /* Clear window buffer */
1152                                         dj->fs->winsect = clust2sect(dj->fs, clst);     /* Cluster start sector */
1153                                         for (c = 0; c < dj->fs->csize; c++) {           /* Fill the new cluster with 0 */
1154                                                 dj->fs->wflag = 1;
1155                                                 if (move_window(dj->fs, 0)) return FR_DISK_ERR;
1156                                                 dj->fs->winsect++;
1157                                         }
1158                                         dj->fs->winsect -= c;                                           /* Rewind window address */
1159 #else
1160                                         return FR_NO_FILE;                      /* Report EOT */
1161 #endif
1162                                 }
1163                                 dj->clust = clst;                               /* Initialize data for new cluster */
1164                                 dj->sect = clust2sect(dj->fs, clst);
1165                         }
1166                 }
1167         }
1168
1169         dj->index = i;
1170         dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR;
1171
1172         return FR_OK;
1173 }
1174
1175
1176
1177
1178 /*-----------------------------------------------------------------------*/
1179 /* Directory handling - Load/Store start cluster number                  */
1180 /*-----------------------------------------------------------------------*/
1181
1182 static
1183 DWORD ld_clust (
1184         FATFS *fs,      /* Pointer to the fs object */
1185         BYTE *dir       /* Pointer to the directory entry */
1186 )
1187 {
1188         DWORD cl;
1189
1190         cl = LD_WORD(dir+DIR_FstClusLO);
1191         if (fs->fs_type == FS_FAT32)
1192                 cl |= (DWORD)LD_WORD(dir+DIR_FstClusHI) << 16;
1193
1194         return cl;
1195 }
1196
1197
1198 #if !_FS_READONLY
1199 static
1200 void st_clust (
1201         BYTE *dir,      /* Pointer to the directory entry */
1202         DWORD cl        /* Value to be set */
1203 )
1204 {
1205         ST_WORD(dir+DIR_FstClusLO, cl);
1206         ST_WORD(dir+DIR_FstClusHI, cl >> 16);
1207 }
1208 #endif
1209
1210
1211
1212 /*-----------------------------------------------------------------------*/
1213 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry   */
1214 /*-----------------------------------------------------------------------*/
1215 #if _USE_LFN
1216 static
1217 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30};      /* Offset of LFN chars in the directory entry */
1218
1219
1220 static
1221 int cmp_lfn (                   /* 1:Matched, 0:Not matched */
1222         WCHAR *lfnbuf,          /* Pointer to the LFN to be compared */
1223         BYTE *dir                       /* Pointer to the directory entry containing a part of LFN */
1224 )
1225 {
1226         UINT i, s;
1227         WCHAR wc, uc;
1228
1229
1230         i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13;  /* Get offset in the LFN buffer */
1231         s = 0; wc = 1;
1232         do {
1233                 uc = LD_WORD(dir+LfnOfs[s]);    /* Pick an LFN character from the entry */
1234                 if (wc) {       /* Last char has not been processed */
1235                         wc = ff_wtoupper(uc);           /* Convert it to upper case */
1236                         if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++]))    /* Compare it */
1237                                 return 0;                               /* Not matched */
1238                 } else {
1239                         if (uc != 0xFFFF) return 0;     /* Check filler */
1240                 }
1241         } while (++s < 13);                             /* Repeat until all chars in the entry are checked */
1242
1243         if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i])   /* Last segment matched but different length */
1244                 return 0;
1245
1246         return 1;                                               /* The part of LFN matched */
1247 }
1248
1249
1250
1251 static
1252 int pick_lfn (                  /* 1:Succeeded, 0:Buffer overflow */
1253         WCHAR *lfnbuf,          /* Pointer to the Unicode-LFN buffer */
1254         BYTE *dir                       /* Pointer to the directory entry */
1255 )
1256 {
1257         UINT i, s;
1258         WCHAR wc, uc;
1259
1260
1261         i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13;  /* Offset in the LFN buffer */
1262
1263         s = 0; wc = 1;
1264         do {
1265                 uc = LD_WORD(dir+LfnOfs[s]);            /* Pick an LFN character from the entry */
1266                 if (wc) {       /* Last char has not been processed */
1267                         if (i >= _MAX_LFN) return 0;    /* Buffer overflow? */
1268                         lfnbuf[i++] = wc = uc;                  /* Store it */
1269                 } else {
1270                         if (uc != 0xFFFF) return 0;             /* Check filler */
1271                 }
1272         } while (++s < 13);                                             /* Read all character in the entry */
1273
1274         if (dir[LDIR_Ord] & LLE) {                              /* Put terminator if it is the last LFN part */
1275                 if (i >= _MAX_LFN) return 0;            /* Buffer overflow? */
1276                 lfnbuf[i] = 0;
1277         }
1278
1279         return 1;
1280 }
1281
1282
1283 #if !_FS_READONLY
1284 static
1285 void fit_lfn (
1286         const WCHAR *lfnbuf,    /* Pointer to the LFN buffer */
1287         BYTE *dir,                              /* Pointer to the directory entry */
1288         BYTE ord,                               /* LFN order (1-20) */
1289         BYTE sum                                /* SFN sum */
1290 )
1291 {
1292         UINT i, s;
1293         WCHAR wc;
1294
1295
1296         dir[LDIR_Chksum] = sum;                 /* Set check sum */
1297         dir[LDIR_Attr] = AM_LFN;                /* Set attribute. LFN entry */
1298         dir[LDIR_Type] = 0;
1299         ST_WORD(dir+LDIR_FstClusLO, 0);
1300
1301         i = (ord - 1) * 13;                             /* Get offset in the LFN buffer */
1302         s = wc = 0;
1303         do {
1304                 if (wc != 0xFFFF) wc = lfnbuf[i++];     /* Get an effective char */
1305                 ST_WORD(dir+LfnOfs[s], wc);     /* Put it */
1306                 if (!wc) wc = 0xFFFF;           /* Padding chars following last char */
1307         } while (++s < 13);
1308         if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE;     /* Bottom LFN part is the start of LFN sequence */
1309         dir[LDIR_Ord] = ord;                    /* Set the LFN order */
1310 }
1311
1312 #endif
1313 #endif
1314
1315
1316
1317 /*-----------------------------------------------------------------------*/
1318 /* Create numbered name                                                  */
1319 /*-----------------------------------------------------------------------*/
1320 #if _USE_LFN
1321 void gen_numname (
1322         BYTE *dst,                      /* Pointer to generated SFN */
1323         const BYTE *src,        /* Pointer to source SFN to be modified */
1324         const WCHAR *lfn,       /* Pointer to LFN */
1325         WORD seq                        /* Sequence number */
1326 )
1327 {
1328         BYTE ns[8], c;
1329         UINT i, j;
1330
1331
1332         mem_cpy(dst, src, 11);
1333
1334         if (seq > 5) {  /* On many collisions, generate a hash number instead of sequential number */
1335                 do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; while (*lfn);
1336         }
1337
1338         /* itoa (hexdecimal) */
1339         i = 7;
1340         do {
1341                 c = (seq % 16) + '0';
1342                 if (c > '9') c += 7;
1343                 ns[i--] = c;
1344                 seq /= 16;
1345         } while (seq);
1346         ns[i] = '~';
1347
1348         /* Append the number */
1349         for (j = 0; j < i && dst[j] != ' '; j++) {
1350                 if (IsDBCS1(dst[j])) {
1351                         if (j == i - 1) break;
1352                         j++;
1353                 }
1354         }
1355         do {
1356                 dst[j++] = (i < 8) ? ns[i++] : ' ';
1357         } while (j < 8);
1358 }
1359 #endif
1360
1361
1362
1363
1364 /*-----------------------------------------------------------------------*/
1365 /* Calculate sum of an SFN                                               */
1366 /*-----------------------------------------------------------------------*/
1367 #if _USE_LFN
1368 static
1369 BYTE sum_sfn (
1370         const BYTE *dir         /* Ptr to directory entry */
1371 )
1372 {
1373         BYTE sum = 0;
1374         UINT n = 11;
1375
1376         do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
1377         return sum;
1378 }
1379 #endif
1380
1381
1382
1383
1384 /*-----------------------------------------------------------------------*/
1385 /* Directory handling - Find an object in the directory                  */
1386 /*-----------------------------------------------------------------------*/
1387
1388 static
1389 FRESULT dir_find (
1390         DIR *dj                 /* Pointer to the directory object linked to the file name */
1391 )
1392 {
1393         FRESULT res;
1394         BYTE c, *dir;
1395 #if _USE_LFN
1396         BYTE a, ord, sum;
1397 #endif
1398
1399         res = dir_sdi(dj, 0);                   /* Rewind directory object */
1400         if (res != FR_OK) return res;
1401
1402 #if _USE_LFN
1403         ord = sum = 0xFF;
1404 #endif
1405         do {
1406                 res = move_window(dj->fs, dj->sect);
1407                 if (res != FR_OK) break;
1408                 dir = dj->dir;                                  /* Ptr to the directory entry of current index */
1409                 c = dir[DIR_Name];
1410                 if (c == 0) { res = FR_NO_FILE; break; }        /* Reached to end of table */
1411 #if _USE_LFN    /* LFN configuration */
1412                 a = dir[DIR_Attr] & AM_MASK;
1413                 if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) {        /* An entry without valid data */
1414                         ord = 0xFF;
1415                 } else {
1416                         if (a == AM_LFN) {                      /* An LFN entry is found */
1417                                 if (dj->lfn) {
1418                                         if (c & LLE) {          /* Is it start of LFN sequence? */
1419                                                 sum = dir[LDIR_Chksum];
1420                                                 c &= ~LLE; ord = c;     /* LFN start order */
1421                                                 dj->lfn_idx = dj->index;
1422                                         }
1423                                         /* Check validity of the LFN entry and compare it with given name */
1424                                         ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
1425                                 }
1426                         } else {                                        /* An SFN entry is found */
1427                                 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
1428                                 ord = 0xFF; dj->lfn_idx = 0xFFFF;       /* Reset LFN sequence */
1429                                 if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break;        /* SFN matched? */
1430                         }
1431                 }
1432 #else           /* Non LFN configuration */
1433                 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
1434                         break;
1435 #endif
1436                 res = dir_next(dj, 0);          /* Next entry */
1437         } while (res == FR_OK);
1438
1439         return res;
1440 }
1441
1442
1443
1444
1445 /*-----------------------------------------------------------------------*/
1446 /* Read an object from the directory                                     */
1447 /*-----------------------------------------------------------------------*/
1448 #if _FS_MINIMIZE <= 1
1449 static
1450 FRESULT dir_read (
1451         DIR *dj                 /* Pointer to the directory object that pointing the entry to be read */
1452 )
1453 {
1454         FRESULT res;
1455         BYTE c, *dir;
1456 #if _USE_LFN
1457         BYTE a, ord = 0xFF, sum = 0xFF;
1458 #endif
1459
1460         res = FR_NO_FILE;
1461         while (dj->sect) {
1462                 res = move_window(dj->fs, dj->sect);
1463                 if (res != FR_OK) break;
1464                 dir = dj->dir;                                  /* Ptr to the directory entry of current index */
1465                 c = dir[DIR_Name];
1466                 if (c == 0) { res = FR_NO_FILE; break; }        /* Reached to end of table */
1467 #if _USE_LFN    /* LFN configuration */
1468                 a = dir[DIR_Attr] & AM_MASK;
1469                 if (c == DDE || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) {    /* An entry without valid data */
1470                         ord = 0xFF;
1471                 } else {
1472                         if (a == AM_LFN) {                      /* An LFN entry is found */
1473                                 if (c & LLE) {                  /* Is it start of LFN sequence? */
1474                                         sum = dir[LDIR_Chksum];
1475                                         c &= ~LLE; ord = c;
1476                                         dj->lfn_idx = dj->index;
1477                                 }
1478                                 /* Check LFN validity and capture it */
1479                                 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
1480                         } else {                                        /* An SFN entry is found */
1481                                 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
1482                                         dj->lfn_idx = 0xFFFF;           /* It has no LFN. */
1483                                 break;
1484                         }
1485                 }
1486 #else           /* Non LFN configuration */
1487                 if (c != DDE && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL))   /* Is it a valid entry? */
1488                         break;
1489 #endif
1490                 res = dir_next(dj, 0);                          /* Next entry */
1491                 if (res != FR_OK) break;
1492         }
1493
1494         if (res != FR_OK) dj->sect = 0;
1495
1496         return res;
1497 }
1498 #endif
1499
1500
1501
1502 /*-----------------------------------------------------------------------*/
1503 /* Register an object to the directory                                   */
1504 /*-----------------------------------------------------------------------*/
1505 #if !_FS_READONLY
1506 static
1507 FRESULT dir_register (  /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
1508         DIR *dj                         /* Target directory with object name to be created */
1509 )
1510 {
1511         FRESULT res;
1512         BYTE c, *dir;
1513 #if _USE_LFN    /* LFN configuration */
1514         WORD n, ne, is;
1515         BYTE sn[12], *fn, sum;
1516         WCHAR *lfn;
1517
1518
1519         fn = dj->fn; lfn = dj->lfn;
1520         mem_cpy(sn, fn, 12);
1521
1522         if (_FS_RPATH && (sn[NS] & NS_DOT))             /* Cannot create dot entry */
1523                 return FR_INVALID_NAME;
1524
1525         if (sn[NS] & NS_LOSS) {                 /* When LFN is out of 8.3 format, generate a numbered name */
1526                 fn[NS] = 0; dj->lfn = 0;                        /* Find only SFN */
1527                 for (n = 1; n < 100; n++) {
1528                         gen_numname(fn, sn, lfn, n);    /* Generate a numbered name */
1529                         res = dir_find(dj);                             /* Check if the name collides with existing SFN */
1530                         if (res != FR_OK) break;
1531                 }
1532                 if (n == 100) return FR_DENIED;         /* Abort if too many collisions */
1533                 if (res != FR_NO_FILE) return res;      /* Abort if the result is other than 'not collided' */
1534                 fn[NS] = sn[NS]; dj->lfn = lfn;
1535         }
1536
1537         if (sn[NS] & NS_LFN) {                  /* When LFN is to be created, reserve an SFN + LFN entries. */
1538                 for (ne = 0; lfn[ne]; ne++) ;
1539                 ne = (ne + 25) / 13;
1540         } else {                                                /* Otherwise reserve only an SFN entry. */
1541                 ne = 1;
1542         }
1543
1544         /* Reserve contiguous entries */
1545         res = dir_sdi(dj, 0);
1546         if (res != FR_OK) return res;
1547         n = is = 0;
1548         do {
1549                 res = move_window(dj->fs, dj->sect);
1550                 if (res != FR_OK) break;
1551                 c = *dj->dir;                           /* Check the entry status */
1552                 if (c == DDE || c == 0) {       /* Is it a blank entry? */
1553                         if (n == 0) is = dj->index;     /* First index of the contiguous entry */
1554                         if (++n == ne) break;   /* A contiguous entry that required count is found */
1555                 } else {
1556                         n = 0;                                  /* Not a blank entry. Restart to search */
1557                 }
1558                 res = dir_next(dj, 1);          /* Next entry with table stretch */
1559         } while (res == FR_OK);
1560
1561         if (res == FR_OK && ne > 1) {   /* Initialize LFN entry if needed */
1562                 res = dir_sdi(dj, is);
1563                 if (res == FR_OK) {
1564                         sum = sum_sfn(dj->fn);  /* Sum of the SFN tied to the LFN */
1565                         ne--;
1566                         do {                                    /* Store LFN entries in bottom first */
1567                                 res = move_window(dj->fs, dj->sect);
1568                                 if (res != FR_OK) break;
1569                                 fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
1570                                 dj->fs->wflag = 1;
1571                                 res = dir_next(dj, 0);  /* Next entry */
1572                         } while (res == FR_OK && --ne);
1573                 }
1574         }
1575
1576 #else   /* Non LFN configuration */
1577         res = dir_sdi(dj, 0);
1578         if (res == FR_OK) {
1579                 do {    /* Find a blank entry for the SFN */
1580                         res = move_window(dj->fs, dj->sect);
1581                         if (res != FR_OK) break;
1582                         c = *dj->dir;
1583                         if (c == DDE || c == 0) break;  /* Is it a blank entry? */
1584                         res = dir_next(dj, 1);                  /* Next entry with table stretch */
1585                 } while (res == FR_OK);
1586         }
1587 #endif
1588
1589         if (res == FR_OK) {             /* Initialize the SFN entry */
1590                 res = move_window(dj->fs, dj->sect);
1591                 if (res == FR_OK) {
1592                         dir = dj->dir;
1593                         mem_set(dir, 0, SZ_DIR);        /* Clean the entry */
1594                         mem_cpy(dir, dj->fn, 11);       /* Put SFN */
1595 #if _USE_LFN
1596                         dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT);     /* Put NT flag */
1597 #endif
1598                         dj->fs->wflag = 1;
1599                 }
1600         }
1601
1602         return res;
1603 }
1604 #endif /* !_FS_READONLY */
1605
1606
1607
1608
1609 /*-----------------------------------------------------------------------*/
1610 /* Remove an object from the directory                                   */
1611 /*-----------------------------------------------------------------------*/
1612 #if !_FS_READONLY && !_FS_MINIMIZE
1613 static
1614 FRESULT dir_remove (    /* FR_OK: Successful, FR_DISK_ERR: A disk error */
1615         DIR *dj                         /* Directory object pointing the entry to be removed */
1616 )
1617 {
1618         FRESULT res;
1619 #if _USE_LFN    /* LFN configuration */
1620         WORD i;
1621
1622         i = dj->index;  /* SFN index */
1623         res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx));   /* Goto the SFN or top of the LFN entries */
1624         if (res == FR_OK) {
1625                 do {
1626                         res = move_window(dj->fs, dj->sect);
1627                         if (res != FR_OK) break;
1628                         *dj->dir = DDE;                 /* Mark the entry "deleted" */
1629                         dj->fs->wflag = 1;
1630                         if (dj->index >= i) break;      /* When reached SFN, all entries of the object has been deleted. */
1631                         res = dir_next(dj, 0);          /* Next entry */
1632                 } while (res == FR_OK);
1633                 if (res == FR_NO_FILE) res = FR_INT_ERR;
1634         }
1635
1636 #else                   /* Non LFN configuration */
1637         res = dir_sdi(dj, dj->index);
1638         if (res == FR_OK) {
1639                 res = move_window(dj->fs, dj->sect);
1640                 if (res == FR_OK) {
1641                         *dj->dir = DDE;                 /* Mark the entry "deleted" */
1642                         dj->fs->wflag = 1;
1643                 }
1644         }
1645 #endif
1646
1647         return res;
1648 }
1649 #endif /* !_FS_READONLY */
1650
1651
1652
1653
1654 /*-----------------------------------------------------------------------*/
1655 /* Pick a segment and create the object name in directory form           */
1656 /*-----------------------------------------------------------------------*/
1657
1658 static
1659 FRESULT create_name (
1660         DIR *dj,                        /* Pointer to the directory object */
1661         const TCHAR **path      /* Pointer to pointer to the segment in the path string */
1662 )
1663 {
1664 #ifdef _EXCVT
1665         static const BYTE excvt[] = _EXCVT;     /* Upper conversion table for extended chars */
1666 #endif
1667
1668 #if _USE_LFN    /* LFN configuration */
1669         BYTE b, cf;
1670         WCHAR w, *lfn;
1671         UINT i, ni, si, di;
1672         const TCHAR *p;
1673
1674         /* Create LFN in Unicode */
1675         for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
1676         lfn = dj->lfn;
1677         si = di = 0;
1678         for (;;) {
1679                 w = p[si++];                                    /* Get a character */
1680                 if (w < ' ' || w == '/' || w == '\\') break;    /* Break on end of segment */
1681                 if (di >= _MAX_LFN)                             /* Reject too long name */
1682                         return FR_INVALID_NAME;
1683 #if !_LFN_UNICODE
1684                 w &= 0xFF;
1685                 if (IsDBCS1(w)) {                               /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
1686                         b = (BYTE)p[si++];                      /* Get 2nd byte */
1687                         if (!IsDBCS2(b))
1688                                 return FR_INVALID_NAME; /* Reject invalid sequence */
1689                         w = (w << 8) + b;                       /* Create a DBC */
1690                 }
1691                 w = ff_convert(w, 1);                   /* Convert ANSI/OEM to Unicode */
1692                 if (!w) return FR_INVALID_NAME; /* Reject invalid code */
1693 #endif
1694                 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */
1695                         return FR_INVALID_NAME;
1696                 lfn[di++] = w;                                  /* Store the Unicode char */
1697         }
1698         *path = &p[si];                                         /* Return pointer to the next segment */
1699         cf = (w < ' ') ? NS_LAST : 0;           /* Set last segment flag if end of path */
1700 #if _FS_RPATH
1701         if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */
1702                 (di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) {
1703                 lfn[di] = 0;
1704                 for (i = 0; i < 11; i++)
1705                         dj->fn[i] = (i < di) ? '.' : ' ';
1706                 dj->fn[i] = cf | NS_DOT;                /* This is a dot entry */
1707                 return FR_OK;
1708         }
1709 #endif
1710         while (di) {                                            /* Strip trailing spaces and dots */
1711                 w = lfn[di-1];
1712                 if (w != ' ' && w != '.') break;
1713                 di--;
1714         }
1715         if (!di) return FR_INVALID_NAME;        /* Reject nul string */
1716
1717         lfn[di] = 0;                                            /* LFN is created */
1718
1719         /* Create SFN in directory form */
1720         mem_set(dj->fn, ' ', 11);
1721         for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ;  /* Strip leading spaces and dots */
1722         if (si) cf |= NS_LOSS | NS_LFN;
1723         while (di && lfn[di - 1] != '.') di--;  /* Find extension (di<=si: no extension) */
1724
1725         b = i = 0; ni = 8;
1726         for (;;) {
1727                 w = lfn[si++];                                  /* Get an LFN char */
1728                 if (!w) break;                                  /* Break on end of the LFN */
1729                 if (w == ' ' || (w == '.' && si != di)) {       /* Remove spaces and dots */
1730                         cf |= NS_LOSS | NS_LFN; continue;
1731                 }
1732
1733                 if (i >= ni || si == di) {              /* Extension or end of SFN */
1734                         if (ni == 11) {                         /* Long extension */
1735                                 cf |= NS_LOSS | NS_LFN; break;
1736                         }
1737                         if (si != di) cf |= NS_LOSS | NS_LFN;   /* Out of 8.3 format */
1738                         if (si > di) break;                     /* No extension */
1739                         si = di; i = 8; ni = 11;        /* Enter extension section */
1740                         b <<= 2; continue;
1741                 }
1742
1743                 if (w >= 0x80) {                                /* Non ASCII char */
1744 #ifdef _EXCVT
1745                         w = ff_convert(w, 0);           /* Unicode -> OEM code */
1746                         if (w) w = excvt[w - 0x80];     /* Convert extended char to upper (SBCS) */
1747 #else
1748                         w = ff_convert(ff_wtoupper(w), 0);      /* Upper converted Unicode -> OEM code */
1749 #endif
1750                         cf |= NS_LFN;                           /* Force create LFN entry */
1751                 }
1752
1753                 if (_DF1S && w >= 0x100) {              /* Double byte char (always false on SBCS cfg) */
1754                         if (i >= ni - 1) {
1755                                 cf |= NS_LOSS | NS_LFN; i = ni; continue;
1756                         }
1757                         dj->fn[i++] = (BYTE)(w >> 8);
1758                 } else {                                                /* Single byte char */
1759                         if (!w || chk_chr("+,;=[]", w)) {       /* Replace illegal chars for SFN */
1760                                 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
1761                         } else {
1762                                 if (IsUpper(w)) {               /* ASCII large capital */
1763                                         b |= 2;
1764                                 } else {
1765                                         if (IsLower(w)) {       /* ASCII small capital */
1766                                                 b |= 1; w -= 0x20;
1767                                         }
1768                                 }
1769                         }
1770                 }
1771                 dj->fn[i++] = (BYTE)w;
1772         }
1773
1774         if (dj->fn[0] == DDE) dj->fn[0] = NDDE; /* If the first char collides with deleted mark, replace it with 0x05 */
1775
1776         if (ni == 8) b <<= 2;
1777         if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03)   /* Create LFN entry when there are composite capitals */
1778                 cf |= NS_LFN;
1779         if (!(cf & NS_LFN)) {                                           /* When LFN is in 8.3 format without extended char, NT flags are created */
1780                 if ((b & 0x03) == 0x01) cf |= NS_EXT;   /* NT flag (Extension has only small capital) */
1781                 if ((b & 0x0C) == 0x04) cf |= NS_BODY;  /* NT flag (Filename has only small capital) */
1782         }
1783
1784         dj->fn[NS] = cf;        /* SFN is created */
1785
1786         return FR_OK;
1787
1788
1789 #else   /* Non-LFN configuration */
1790         BYTE b, c, d, *sfn;
1791         UINT ni, si, i;
1792         const char *p;
1793
1794         /* Create file name in directory form */
1795         for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
1796         sfn = dj->fn;
1797         mem_set(sfn, ' ', 11);
1798         si = i = b = 0; ni = 8;
1799 #if _FS_RPATH
1800         if (p[si] == '.') { /* Is this a dot entry? */
1801                 for (;;) {
1802                         c = (BYTE)p[si++];
1803                         if (c != '.' || si >= 3) break;
1804                         sfn[i++] = c;
1805                 }
1806                 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
1807                 *path = &p[si];                                                                 /* Return pointer to the next segment */
1808                 sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT;       /* Set last segment flag if end of path */
1809                 return FR_OK;
1810         }
1811 #endif
1812         for (;;) {
1813                 c = (BYTE)p[si++];
1814                 if (c <= ' ' || c == '/' || c == '\\') break;   /* Break on end of segment */
1815                 if (c == '.' || i >= ni) {
1816                         if (ni != 8 || c != '.') return FR_INVALID_NAME;
1817                         i = 8; ni = 11;
1818                         b <<= 2; continue;
1819                 }
1820                 if (c >= 0x80) {                                /* Extended char? */
1821                         b |= 3;                                         /* Eliminate NT flag */
1822 #ifdef _EXCVT
1823                         c = excvt[c - 0x80];            /* Upper conversion (SBCS) */
1824 #else
1825 #if !_DF1S      /* ASCII only cfg */
1826                         return FR_INVALID_NAME;
1827 #endif
1828 #endif
1829                 }
1830                 if (IsDBCS1(c)) {                               /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
1831                         d = (BYTE)p[si++];                      /* Get 2nd byte */
1832                         if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
1833                                 return FR_INVALID_NAME;
1834                         sfn[i++] = c;
1835                         sfn[i++] = d;
1836                 } else {                                                /* Single byte code */
1837                         if (chk_chr("\"*+,:;<=>\?[]|\x7F", c))  /* Reject illegal chrs for SFN */
1838                                 return FR_INVALID_NAME;
1839                         if (IsUpper(c)) {                       /* ASCII large capital? */
1840                                 b |= 2;
1841                         } else {
1842                                 if (IsLower(c)) {               /* ASCII small capital? */
1843                                         b |= 1; c -= 0x20;
1844                                 }
1845                         }
1846                         sfn[i++] = c;
1847                 }
1848         }
1849         *path = &p[si];                                         /* Return pointer to the next segment */
1850         c = (c <= ' ') ? NS_LAST : 0;           /* Set last segment flag if end of path */
1851
1852         if (!i) return FR_INVALID_NAME;         /* Reject nul string */
1853         if (sfn[0] == DDE) sfn[0] = NDDE;       /* When first char collides with DDE, replace it with 0x05 */
1854
1855         if (ni == 8) b <<= 2;
1856         if ((b & 0x03) == 0x01) c |= NS_EXT;    /* NT flag (Name extension has only small capital) */
1857         if ((b & 0x0C) == 0x04) c |= NS_BODY;   /* NT flag (Name body has only small capital) */
1858
1859         sfn[NS] = c;            /* Store NT flag, File name is created */
1860
1861         return FR_OK;
1862 #endif
1863 }
1864
1865
1866
1867
1868 /*-----------------------------------------------------------------------*/
1869 /* Get file information from directory entry                             */
1870 /*-----------------------------------------------------------------------*/
1871 #if _FS_MINIMIZE <= 1
1872 static
1873 void get_fileinfo (             /* No return code */
1874         DIR *dj,                        /* Pointer to the directory object */
1875         FILINFO *fno            /* Pointer to the file information to be filled */
1876 )
1877 {
1878         UINT i;
1879         BYTE nt, *dir;
1880         TCHAR *p, c;
1881
1882
1883         p = fno->fname;
1884         if (dj->sect) {
1885                 dir = dj->dir;
1886                 nt = dir[DIR_NTres];            /* NT flag */
1887                 for (i = 0; i < 8; i++) {       /* Copy name body */
1888                         c = dir[i];
1889                         if (c == ' ') break;
1890                         if (c == NDDE) c = (TCHAR)DDE;
1891                         if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20;
1892 #if _LFN_UNICODE
1893                         if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1]))
1894                                 c = (c << 8) | dir[++i];
1895                         c = ff_convert(c, 1);
1896                         if (!c) c = '?';
1897 #endif
1898                         *p++ = c;
1899                 }
1900                 if (dir[8] != ' ') {            /* Copy name extension */
1901                         *p++ = '.';
1902                         for (i = 8; i < 11; i++) {
1903                                 c = dir[i];
1904                                 if (c == ' ') break;
1905                                 if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20;
1906 #if _LFN_UNICODE
1907                                 if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1]))
1908                                         c = (c << 8) | dir[++i];
1909                                 c = ff_convert(c, 1);
1910                                 if (!c) c = '?';
1911 #endif
1912                                 *p++ = c;
1913                         }
1914                 }
1915                 fno->fattrib = dir[DIR_Attr];                           /* Attribute */
1916                 fno->fsize = LD_DWORD(dir+DIR_FileSize);        /* Size */
1917                 fno->fdate = LD_WORD(dir+DIR_WrtDate);          /* Date */
1918                 fno->ftime = LD_WORD(dir+DIR_WrtTime);          /* Time */
1919         }
1920         *p = 0;         /* Terminate SFN str by a \0 */
1921
1922 #if _USE_LFN
1923         if (fno->lfname && fno->lfsize) {
1924                 TCHAR *tp = fno->lfname;
1925                 WCHAR w, *lfn;
1926
1927                 i = 0;
1928                 if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
1929                         lfn = dj->lfn;
1930                         while ((w = *lfn++) != 0) {                     /* Get an LFN char */
1931 #if !_LFN_UNICODE
1932                                 w = ff_convert(w, 0);                   /* Unicode -> OEM conversion */
1933                                 if (!w) { i = 0; break; }               /* Could not convert, no LFN */
1934                                 if (_DF1S && w >= 0x100)                /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
1935                                         tp[i++] = (TCHAR)(w >> 8);
1936 #endif
1937                                 if (i >= fno->lfsize - 1) { i = 0; break; }     /* Buffer overflow, no LFN */
1938                                 tp[i++] = (TCHAR)w;
1939                         }
1940                 }
1941                 tp[i] = 0;      /* Terminate the LFN str by a \0 */
1942         }
1943 #endif
1944 }
1945 #endif /* _FS_MINIMIZE <= 1 */
1946
1947
1948
1949
1950 /*-----------------------------------------------------------------------*/
1951 /* Follow a file path                                                    */
1952 /*-----------------------------------------------------------------------*/
1953
1954 static
1955 FRESULT follow_path (   /* FR_OK(0): successful, !=0: error code */
1956         DIR *dj,                        /* Directory object to return last directory and found object */
1957         const TCHAR *path       /* Full-path string to find a file or directory */
1958 )
1959 {
1960         FRESULT res;
1961         BYTE *dir, ns;
1962
1963
1964 #if _FS_RPATH
1965         if (*path == '/' || *path == '\\') { /* There is a heading separator */
1966                 path++; dj->sclust = 0;         /* Strip it and start from the root dir */
1967         } else {                                                        /* No heading separator */
1968                 dj->sclust = dj->fs->cdir;      /* Start from the current dir */
1969         }
1970 #else
1971         if (*path == '/' || *path == '\\')      /* Strip heading separator if exist */
1972                 path++;
1973         dj->sclust = 0;                                         /* Start from the root dir */
1974 #endif
1975
1976         if ((UINT)*path < ' ') {                        /* Nul path means the start directory itself */
1977                 res = dir_sdi(dj, 0);
1978                 dj->dir = 0;
1979         } else {                                                        /* Follow path */
1980                 for (;;) {
1981                         res = create_name(dj, &path);   /* Get a segment */
1982                         if (res != FR_OK) break;
1983                         res = dir_find(dj);                             /* Find it */
1984                         ns = *(dj->fn+NS);
1985                         if (res != FR_OK) {                             /* Failed to find the object */
1986                                 if (res != FR_NO_FILE) break;   /* Abort if any hard error occurred */
1987                                 /* Object not found */
1988                                 if (_FS_RPATH && (ns & NS_DOT)) {       /* If dot entry is not exit */
1989                                         dj->sclust = 0; dj->dir = 0;    /* It is the root dir */
1990                                         res = FR_OK;
1991                                         if (!(ns & NS_LAST)) continue;
1992                                 } else {                                                        /* Could not find the object */
1993                                         if (!(ns & NS_LAST)) res = FR_NO_PATH;
1994                                 }
1995                                 break;
1996                         }
1997                         if (ns & NS_LAST) break;                        /* Last segment match. Function completed. */
1998                         dir = dj->dir;                                          /* There is next segment. Follow the sub directory */
1999                         if (!(dir[DIR_Attr] & AM_DIR)) {        /* Cannot follow because it is a file */
2000                                 res = FR_NO_PATH; break;
2001                         }
2002                         dj->sclust = ld_clust(dj->fs, dir);
2003                 }
2004         }
2005
2006         return res;
2007 }
2008
2009
2010
2011
2012 /*-----------------------------------------------------------------------*/
2013 /* Load a sector and check if it is an FAT Volume Boot Record            */
2014 /*-----------------------------------------------------------------------*/
2015
2016 static
2017 BYTE check_fs ( /* 0:FAT-VBR, 1:Any BR but not FAT, 2:Not a BR, 3:Disk error */
2018         FATFS *fs,      /* File system object */
2019         DWORD sect      /* Sector# (lba) to check if it is an FAT boot record or not */
2020 )
2021 {
2022         if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK)     /* Load boot record */
2023                 return 3;
2024         if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55)               /* Check record signature (always placed at offset 510 even if the sector size is >512) */
2025                 return 2;
2026
2027         if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
2028                 return 0;
2029         if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
2030                 return 0;
2031
2032         return 1;
2033 }
2034
2035
2036
2037
2038 /*-----------------------------------------------------------------------*/
2039 /* Check if the file system object is valid or not                       */
2040 /*-----------------------------------------------------------------------*/
2041
2042 static
2043 FRESULT chk_mounted (   /* FR_OK(0): successful, !=0: any error occurred */
2044         const TCHAR **path,     /* Pointer to pointer to the path name (drive number) */
2045         FATFS **rfs,            /* Pointer to pointer to the found file system object */
2046         BYTE wmode                      /* !=0: Check write protection for write access */
2047 )
2048 {
2049         BYTE fmt, b, pi, *tbl;
2050         UINT vol;
2051         DSTATUS stat;
2052         DWORD bsect, fasize, tsect, sysect, nclst, szbfat;
2053         WORD nrsv;
2054         const TCHAR *p = *path;
2055         FATFS *fs;
2056
2057
2058         /* Get logical drive number from the path name */
2059         vol = p[0] - '0';                                       /* Is there a drive number? */
2060         if (vol <= 9 && p[1] == ':') {          /* Found a drive number, get and strip it */
2061                 p += 2; *path = p;                              /* Return pointer to the path name */
2062         } else {                                                        /* No drive number is given */
2063 #if _FS_RPATH
2064                 vol = CurrVol;                                  /* Use current drive */
2065 #else
2066                 vol = 0;                                                /* Use drive 0 */
2067 #endif
2068         }
2069
2070         /* Check if the file system object is valid or not */
2071         *rfs = 0;
2072         if (vol >= _VOLUMES)                            /* Is the drive number valid? */
2073                 return FR_INVALID_DRIVE;
2074         fs = FatFs[vol];                                        /* Get corresponding file system object */
2075         if (!fs) return FR_NOT_ENABLED;         /* Is the file system object available? */
2076
2077         ENTER_FF(fs);                                           /* Lock file system */
2078
2079         *rfs = fs;                                                      /* Return pointer to the corresponding file system object */
2080         if (fs->fs_type) {                                      /* If the volume has been mounted */
2081                 stat = disk_status(fs->drv);
2082                 if (!(stat & STA_NOINIT)) {             /* and the physical drive is kept initialized (has not been changed), */
2083                         if (!_FS_READONLY && wmode && (stat & STA_PROTECT))     /* Check write protection if needed */
2084                                 return FR_WRITE_PROTECTED;
2085                         return FR_OK;                           /* The file system object is valid */
2086                 }
2087         }
2088
2089         /* The file system object is not valid. */
2090         /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
2091
2092         fs->fs_type = 0;                                        /* Clear the file system object */
2093         fs->drv = LD2PD(vol);                           /* Bind the logical drive and a physical drive */
2094         stat = disk_initialize(fs->drv);        /* Initialize the physical drive */
2095         if (stat & STA_NOINIT)                          /* Check if the initialization succeeded */
2096                 return FR_NOT_READY;                    /* Failed to initialize due to no medium or hard error */
2097         if (!_FS_READONLY && wmode && (stat & STA_PROTECT))     /* Check disk write protection if needed */
2098                 return FR_WRITE_PROTECTED;
2099 #if _MAX_SS != 512                                              /* Get disk sector size (variable sector size cfg only) */
2100         if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK)
2101                 return FR_DISK_ERR;
2102 #endif
2103         /* Search FAT partition on the drive. Supports only generic partitions, FDISK and SFD. */
2104         fmt = check_fs(fs, bsect = 0);          /* Load sector 0 and check if it is an FAT-VBR (in SFD) */
2105         if (LD2PT(vol) && !fmt) fmt = 1;        /* Force non-SFD if the volume is forced partition */
2106         if (fmt == 1) {                                         /* Not an FAT-VBR, the physical drive can be partitioned */
2107                 /* Check the partition listed in the partition table */
2108                 pi = LD2PT(vol);
2109                 if (pi) pi--;
2110                 tbl = &fs->win[MBR_Table + pi * SZ_PTE];/* Partition table */
2111                 if (tbl[4]) {                                           /* Is the partition existing? */
2112                         bsect = LD_DWORD(&tbl[8]);              /* Partition offset in LBA */
2113                         fmt = check_fs(fs, bsect);              /* Check the partition */
2114                 }
2115         }
2116         if (fmt == 3) return FR_DISK_ERR;
2117         if (fmt) return FR_NO_FILESYSTEM;               /* No FAT volume is found */
2118
2119         /* An FAT volume is found. Following code initializes the file system object */
2120
2121         if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs))          /* (BPB_BytsPerSec must be equal to the physical sector size) */
2122                 return FR_NO_FILESYSTEM;
2123
2124         fasize = LD_WORD(fs->win+BPB_FATSz16);                          /* Number of sectors per FAT */
2125         if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32);
2126         fs->fsize = fasize;
2127
2128         fs->n_fats = b = fs->win[BPB_NumFATs];                          /* Number of FAT copies */
2129         if (b != 1 && b != 2) return FR_NO_FILESYSTEM;          /* (Must be 1 or 2) */
2130         fasize *= b;                                                                            /* Number of sectors for FAT area */
2131
2132         fs->csize = b = fs->win[BPB_SecPerClus];                        /* Number of sectors per cluster */
2133         if (!b || (b & (b - 1))) return FR_NO_FILESYSTEM;       /* (Must be power of 2) */
2134
2135         fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt);        /* Number of root directory entries */
2136         if (fs->n_rootdir % (SS(fs) / SZ_DIR)) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */
2137
2138         tsect = LD_WORD(fs->win+BPB_TotSec16);                          /* Number of sectors on the volume */
2139         if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
2140
2141         nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt);                         /* Number of reserved sectors */
2142         if (!nrsv) return FR_NO_FILESYSTEM;                                     /* (BPB_RsvdSecCnt must not be 0) */
2143
2144         /* Determine the FAT sub type */
2145         sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR);     /* RSV+FAT+DIR */
2146         if (tsect < sysect) return FR_NO_FILESYSTEM;            /* (Invalid volume size) */
2147         nclst = (tsect - sysect) / fs->csize;                           /* Number of clusters */
2148         if (!nclst) return FR_NO_FILESYSTEM;                            /* (Invalid volume size) */
2149         fmt = FS_FAT12;
2150         if (nclst >= MIN_FAT16) fmt = FS_FAT16;
2151         if (nclst >= MIN_FAT32) fmt = FS_FAT32;
2152
2153         /* Boundaries and Limits */
2154         fs->n_fatent = nclst + 2;                                                       /* Number of FAT entries */
2155         fs->database = bsect + sysect;                                          /* Data start sector */
2156         fs->fatbase = bsect + nrsv;                                             /* FAT start sector */
2157         if (fmt == FS_FAT32) {
2158                 if (fs->n_rootdir) return FR_NO_FILESYSTEM;             /* (BPB_RootEntCnt must be 0) */
2159                 fs->dirbase = LD_DWORD(fs->win+BPB_RootClus);   /* Root directory start cluster */
2160                 szbfat = fs->n_fatent * 4;                                              /* (Required FAT size) */
2161         } else {
2162                 if (!fs->n_rootdir)     return FR_NO_FILESYSTEM;        /* (BPB_RootEntCnt must not be 0) */
2163                 fs->dirbase = fs->fatbase + fasize;                             /* Root directory start sector */
2164                 szbfat = (fmt == FS_FAT16) ?                                    /* (Required FAT size) */
2165                         fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
2166         }
2167         if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs))       /* (BPB_FATSz must not be less than required) */
2168                 return FR_NO_FILESYSTEM;
2169
2170 #if !_FS_READONLY
2171         /* Initialize cluster allocation information */
2172         fs->free_clust = 0xFFFFFFFF;
2173         fs->last_clust = 0;
2174
2175         /* Get fsinfo if available */
2176         if (fmt == FS_FAT32) {
2177                 fs->fsi_flag = 0;
2178                 fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
2179                 if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK &&
2180                         LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
2181                         LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
2182                         LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) {
2183                                 fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
2184                                 fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
2185                 }
2186         }
2187 #endif
2188         fs->fs_type = fmt;              /* FAT sub-type */
2189         fs->id = ++Fsid;                /* File system mount ID */
2190         fs->winsect = 0;                /* Invalidate sector cache */
2191         fs->wflag = 0;
2192 #if _FS_RPATH
2193         fs->cdir = 0;                   /* Current directory (root dir) */
2194 #endif
2195 #if _FS_LOCK                            /* Clear file lock semaphores */
2196         clear_lock(fs);
2197 #endif
2198
2199         return FR_OK;
2200 }
2201
2202
2203
2204
2205 /*-----------------------------------------------------------------------*/
2206 /* Check if the file/dir object is valid or not                          */
2207 /*-----------------------------------------------------------------------*/
2208
2209 static
2210 FRESULT validate (      /* FR_OK(0): The object is valid, !=0: Invalid */
2211         void* obj               /* Pointer to the object FIL/DIR to check validity */
2212 )
2213 {
2214         FIL *fil;
2215
2216
2217         fil = (FIL*)obj;        /* Assuming offset of fs and id in the FIL/DIR is identical */
2218         if (!fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id)
2219                 return FR_INVALID_OBJECT;
2220
2221         ENTER_FF(fil->fs);              /* Lock file system */
2222
2223         if (disk_status(fil->fs->drv) & STA_NOINIT)
2224                 return FR_NOT_READY;
2225
2226         return FR_OK;
2227 }
2228
2229
2230
2231
2232 /*--------------------------------------------------------------------------
2233
2234    Public Functions
2235
2236 --------------------------------------------------------------------------*/
2237
2238
2239
2240 /*-----------------------------------------------------------------------*/
2241 /* Mount/Unmount a Logical Drive                                         */
2242 /*-----------------------------------------------------------------------*/
2243
2244 FRESULT f_mount (
2245         BYTE vol,               /* Logical drive number to be mounted/unmounted */
2246         FATFS *fs               /* Pointer to new file system object (NULL for unmount)*/
2247 )
2248 {
2249         FATFS *rfs;
2250
2251
2252         if (vol >= _VOLUMES)            /* Check if the drive number is valid */
2253                 return FR_INVALID_DRIVE;
2254         rfs = FatFs[vol];                       /* Get current fs object */
2255
2256         if (rfs) {
2257 #if _FS_LOCK
2258                 clear_lock(rfs);
2259 #endif
2260 #if _FS_REENTRANT                               /* Discard sync object of the current volume */
2261                 if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR;
2262 #endif
2263                 rfs->fs_type = 0;               /* Clear old fs object */
2264         }
2265
2266         if (fs) {
2267                 fs->fs_type = 0;                /* Clear new fs object */
2268 #if _FS_REENTRANT                               /* Create sync object for the new volume */
2269                 if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
2270 #endif
2271         }
2272         FatFs[vol] = fs;                        /* Register new fs object */
2273
2274         return FR_OK;
2275 }
2276
2277
2278
2279
2280 /*-----------------------------------------------------------------------*/
2281 /* Open or Create a File                                                 */
2282 /*-----------------------------------------------------------------------*/
2283
2284 FRESULT f_open (
2285         FIL *fp,                        /* Pointer to the blank file object */
2286         const TCHAR *path,      /* Pointer to the file name */
2287         BYTE mode                       /* Access mode and file open mode flags */
2288 )
2289 {
2290         FRESULT res;
2291         DIR dj;
2292         BYTE *dir;
2293         DEF_NAMEBUF;
2294
2295
2296         if (!fp) return FR_INVALID_OBJECT;
2297         fp->fs = 0;                     /* Clear file object */
2298
2299 #if !_FS_READONLY
2300         mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
2301         res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ));
2302 #else
2303         mode &= FA_READ;
2304         res = chk_mounted(&path, &dj.fs, 0);
2305 #endif
2306         if (res == FR_OK) {
2307                 INIT_BUF(dj);
2308                 res = follow_path(&dj, path);   /* Follow the file path */
2309                 dir = dj.dir;
2310 #if !_FS_READONLY       /* R/W configuration */
2311                 if (res == FR_OK) {
2312                         if (!dir)       /* Current dir itself */
2313                                 res = FR_INVALID_NAME;
2314 #if _FS_LOCK
2315                         else
2316                                 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2317 #endif
2318                 }
2319                 /* Create or Open a file */
2320                 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
2321                         DWORD dw, cl;
2322
2323                         if (res != FR_OK) {                                     /* No file, create new */
2324                                 if (res == FR_NO_FILE)                  /* There is no file to open, create a new entry */
2325 #if _FS_LOCK
2326                                         res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
2327 #else
2328                                         res = dir_register(&dj);
2329 #endif
2330                                 mode |= FA_CREATE_ALWAYS;               /* File is created */
2331                                 dir = dj.dir;                                   /* New entry */
2332                         }
2333                         else {                                                          /* Any object is already existing */
2334                                 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) {        /* Cannot overwrite it (R/O or DIR) */
2335                                         res = FR_DENIED;
2336                                 } else {
2337                                         if (mode & FA_CREATE_NEW)       /* Cannot create as new file */
2338                                                 res = FR_EXIST;
2339                                 }
2340                         }
2341                         if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) {        /* Truncate it if overwrite mode */
2342                                 dw = get_fattime();                                     /* Created time */
2343                                 ST_DWORD(dir+DIR_CrtTime, dw);
2344                                 dir[DIR_Attr] = 0;                                      /* Reset attribute */
2345                                 ST_DWORD(dir+DIR_FileSize, 0);          /* size = 0 */
2346                                 cl = ld_clust(dj.fs, dir);                      /* Get start cluster */
2347                                 st_clust(dir, 0);                                       /* cluster = 0 */
2348                                 dj.fs->wflag = 1;
2349                                 if (cl) {                                                       /* Remove the cluster chain if exist */
2350                                         dw = dj.fs->winsect;
2351                                         res = remove_chain(dj.fs, cl);
2352                                         if (res == FR_OK) {
2353                                                 dj.fs->last_clust = cl - 1;     /* Reuse the cluster hole */
2354                                                 res = move_window(dj.fs, dw);
2355                                         }
2356                                 }
2357                         }
2358                 }
2359                 else {  /* Open an existing file */
2360                         if (res == FR_OK) {                                             /* Follow succeeded */
2361                                 if (dir[DIR_Attr] & AM_DIR) {           /* It is a directory */
2362                                         res = FR_NO_FILE;
2363                                 } else {
2364                                         if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
2365                                                 res = FR_DENIED;
2366                                 }
2367                         }
2368                 }
2369                 if (res == FR_OK) {
2370                         if (mode & FA_CREATE_ALWAYS)                    /* Set file change flag if created or overwritten */
2371                                 mode |= FA__WRITTEN;
2372                         fp->dir_sect = dj.fs->winsect;                  /* Pointer to the directory entry */
2373                         fp->dir_ptr = dir;
2374 #if _FS_LOCK
2375                         fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2376                         if (!fp->lockid) res = FR_INT_ERR;
2377 #endif
2378                 }
2379
2380 #else                           /* R/O configuration */
2381                 if (res == FR_OK) {                                     /* Follow succeeded */
2382                         dir = dj.dir;
2383                         if (!dir) {                                             /* Current dir itself */
2384                                 res = FR_INVALID_NAME;
2385                         } else {
2386                                 if (dir[DIR_Attr] & AM_DIR)     /* It is a directory */
2387                                         res = FR_NO_FILE;
2388                         }
2389                 }
2390 #endif
2391                 FREE_BUF();
2392
2393                 if (res == FR_OK) {
2394                         fp->flag = mode;                                        /* File access mode */
2395                         fp->sclust = ld_clust(dj.fs, dir);      /* File start cluster */
2396                         fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
2397                         fp->fptr = 0;                                           /* File pointer */
2398                         fp->dsect = 0;
2399 #if _USE_FASTSEEK
2400                         fp->cltbl = 0;                                          /* Normal seek mode */
2401 #endif
2402                         fp->fs = dj.fs; fp->id = dj.fs->id;     /* Validate file object */
2403                 }
2404         }
2405
2406         LEAVE_FF(dj.fs, res);
2407 }
2408
2409
2410
2411
2412 /*-----------------------------------------------------------------------*/
2413 /* Read File                                                             */
2414 /*-----------------------------------------------------------------------*/
2415
2416 FRESULT f_read (
2417         FIL *fp,                /* Pointer to the file object */
2418         void *buff,             /* Pointer to data buffer */
2419         UINT btr,               /* Number of bytes to read */
2420         UINT *br                /* Pointer to number of bytes read */
2421 )
2422 {
2423         FRESULT res;
2424         DWORD clst, sect, remain;
2425         UINT rcnt, cc;
2426         BYTE csect, *rbuff = buff;
2427
2428
2429         *br = 0;        /* Clear read byte counter */
2430
2431         res = validate(fp);                                                     /* Check validity */
2432         if (res != FR_OK) LEAVE_FF(fp->fs, res);
2433         if (fp->flag & FA__ERROR)                                       /* Aborted file? */
2434                 LEAVE_FF(fp->fs, FR_INT_ERR);
2435         if (!(fp->flag & FA_READ))                                      /* Check access mode */
2436                 LEAVE_FF(fp->fs, FR_DENIED);
2437         remain = fp->fsize - fp->fptr;
2438         if (btr > remain) btr = (UINT)remain;           /* Truncate btr by remaining bytes */
2439
2440         for ( ;  btr;                                                           /* Repeat until all data read */
2441                 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
2442                 if ((fp->fptr % SS(fp->fs)) == 0) {             /* On the sector boundary? */
2443                         csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1));    /* Sector offset in the cluster */
2444                         if (!csect) {                                           /* On the cluster boundary? */
2445                                 if (fp->fptr == 0) {                    /* On the top of the file? */
2446                                         clst = fp->sclust;                      /* Follow from the origin */
2447                                 } else {                                                /* Middle or end of the file */
2448 #if _USE_FASTSEEK
2449                                         if (fp->cltbl)
2450                                                 clst = clmt_clust(fp, fp->fptr);        /* Get cluster# from the CLMT */
2451                                         else
2452 #endif
2453                                                 clst = get_fat(fp->fs, fp->clust);      /* Follow cluster chain on the FAT */
2454                                 }
2455                                 if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
2456                                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2457                                 fp->clust = clst;                               /* Update current cluster */
2458                         }
2459                         sect = clust2sect(fp->fs, fp->clust);   /* Get current sector */
2460                         if (!sect) ABORT(fp->fs, FR_INT_ERR);
2461                         sect += csect;
2462                         cc = btr / SS(fp->fs);                          /* When remaining bytes >= sector size, */
2463                         if (cc) {                                                       /* Read maximum contiguous sectors directly */
2464                                 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2465                                         cc = fp->fs->csize - csect;
2466                                 if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK)
2467                                         ABORT(fp->fs, FR_DISK_ERR);
2468 #if !_FS_READONLY && _FS_MINIMIZE <= 2                  /* Replace one of the read sectors with cached data if it contains a dirty sector */
2469 #if _FS_TINY
2470                                 if (fp->fs->wflag && fp->fs->winsect - sect < cc)
2471                                         mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
2472 #else
2473                                 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
2474                                         mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
2475 #endif
2476 #endif
2477                                 rcnt = SS(fp->fs) * cc;                 /* Number of bytes transferred */
2478                                 continue;
2479                         }
2480 #if !_FS_TINY
2481                         if (fp->dsect != sect) {                        /* Load data sector if not in cache */
2482 #if !_FS_READONLY
2483                                 if (fp->flag & FA__DIRTY) {             /* Write-back dirty sector cache */
2484                                         if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2485                                                 ABORT(fp->fs, FR_DISK_ERR);
2486                                         fp->flag &= ~FA__DIRTY;
2487                                 }
2488 #endif
2489                                 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */
2490                                         ABORT(fp->fs, FR_DISK_ERR);
2491                         }
2492 #endif
2493                         fp->dsect = sect;
2494                 }
2495                 rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));      /* Get partial sector data from sector buffer */
2496                 if (rcnt > btr) rcnt = btr;
2497 #if _FS_TINY
2498                 if (move_window(fp->fs, fp->dsect))             /* Move sector window */
2499                         ABORT(fp->fs, FR_DISK_ERR);
2500                 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt);      /* Pick partial sector */
2501 #else
2502                 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt);  /* Pick partial sector */
2503 #endif
2504         }
2505
2506         LEAVE_FF(fp->fs, FR_OK);
2507 }
2508
2509
2510
2511
2512 #if !_FS_READONLY
2513 /*-----------------------------------------------------------------------*/
2514 /* Write File                                                            */
2515 /*-----------------------------------------------------------------------*/
2516
2517 FRESULT f_write (
2518         FIL *fp,                        /* Pointer to the file object */
2519         const void *buff,       /* Pointer to the data to be written */
2520         UINT btw,                       /* Number of bytes to write */
2521         UINT *bw                        /* Pointer to number of bytes written */
2522 )
2523 {
2524         FRESULT res;
2525         DWORD clst, sect;
2526         UINT wcnt, cc;
2527         const BYTE *wbuff = buff;
2528         BYTE csect;
2529
2530
2531         *bw = 0;        /* Clear write byte counter */
2532
2533         res = validate(fp);                                             /* Check validity */
2534         if (res != FR_OK) LEAVE_FF(fp->fs, res);
2535         if (fp->flag & FA__ERROR)                               /* Aborted file? */
2536                 LEAVE_FF(fp->fs, FR_INT_ERR);
2537         if (!(fp->flag & FA_WRITE))                             /* Check access mode */
2538                 LEAVE_FF(fp->fs, FR_DENIED);
2539         if ((DWORD)(fp->fsize + btw) < fp->fsize) btw = 0;      /* File size cannot reach 4GB */
2540
2541         for ( ;  btw;                                                   /* Repeat until all data written */
2542                 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
2543                 if ((fp->fptr % SS(fp->fs)) == 0) {     /* On the sector boundary? */
2544                         csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1));    /* Sector offset in the cluster */
2545                         if (!csect) {                                   /* On the cluster boundary? */
2546                                 if (fp->fptr == 0) {            /* On the top of the file? */
2547                                         clst = fp->sclust;              /* Follow from the origin */
2548                                         if (clst == 0)                  /* When no cluster is allocated, */
2549                                                 fp->sclust = clst = create_chain(fp->fs, 0);    /* Create a new cluster chain */
2550                                 } else {                                        /* Middle or end of the file */
2551 #if _USE_FASTSEEK
2552                                         if (fp->cltbl)
2553                                                 clst = clmt_clust(fp, fp->fptr);        /* Get cluster# from the CLMT */
2554                                         else
2555 #endif
2556                                                 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */
2557                                 }
2558                                 if (clst == 0) break;           /* Could not allocate a new cluster (disk full) */
2559                                 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
2560                                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2561                                 fp->clust = clst;                       /* Update current cluster */
2562                         }
2563 #if _FS_TINY
2564                         if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0))     /* Write-back sector cache */
2565                                 ABORT(fp->fs, FR_DISK_ERR);
2566 #else
2567                         if (fp->flag & FA__DIRTY) {             /* Write-back sector cache */
2568                                 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2569                                         ABORT(fp->fs, FR_DISK_ERR);
2570                                 fp->flag &= ~FA__DIRTY;
2571                         }
2572 #endif
2573                         sect = clust2sect(fp->fs, fp->clust);   /* Get current sector */
2574                         if (!sect) ABORT(fp->fs, FR_INT_ERR);
2575                         sect += csect;
2576                         cc = btw / SS(fp->fs);                  /* When remaining bytes >= sector size, */
2577                         if (cc) {                                               /* Write maximum contiguous sectors directly */
2578                                 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2579                                         cc = fp->fs->csize - csect;
2580                                 if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK)
2581                                         ABORT(fp->fs, FR_DISK_ERR);
2582 #if _FS_TINY
2583                                 if (fp->fs->winsect - sect < cc) {      /* Refill sector cache if it gets invalidated by the direct write */
2584                                         mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
2585                                         fp->fs->wflag = 0;
2586                                 }
2587 #else
2588                                 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2589                                         mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
2590                                         fp->flag &= ~FA__DIRTY;
2591                                 }
2592 #endif
2593                                 wcnt = SS(fp->fs) * cc;         /* Number of bytes transferred */
2594                                 continue;
2595                         }
2596 #if _FS_TINY
2597                         if (fp->fptr >= fp->fsize) {    /* Avoid silly cache filling at growing edge */
2598                                 if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR);
2599                                 fp->fs->winsect = sect;
2600                         }
2601 #else
2602                         if (fp->dsect != sect) {                /* Fill sector cache with file data */
2603                                 if (fp->fptr < fp->fsize &&
2604                                         disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
2605                                                 ABORT(fp->fs, FR_DISK_ERR);
2606                         }
2607 #endif
2608                         fp->dsect = sect;
2609                 }
2610                 wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
2611                 if (wcnt > btw) wcnt = btw;
2612 #if _FS_TINY
2613                 if (move_window(fp->fs, fp->dsect))     /* Move sector window */
2614                         ABORT(fp->fs, FR_DISK_ERR);
2615                 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt);      /* Fit partial sector */
2616                 fp->fs->wflag = 1;
2617 #else
2618                 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt);  /* Fit partial sector */
2619                 fp->flag |= FA__DIRTY;
2620 #endif
2621         }
2622
2623         if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
2624         fp->flag |= FA__WRITTEN;                                                /* Set file change flag */
2625
2626         LEAVE_FF(fp->fs, FR_OK);
2627 }
2628
2629
2630
2631
2632 /*-----------------------------------------------------------------------*/
2633 /* Synchronize the File Object                                           */
2634 /*-----------------------------------------------------------------------*/
2635
2636 FRESULT f_sync (
2637         FIL *fp         /* Pointer to the file object */
2638 )
2639 {
2640         FRESULT res;
2641         DWORD tim;
2642         BYTE *dir;
2643
2644
2645         res = validate(fp);                                     /* Check validity of the object */
2646         if (res == FR_OK) {
2647                 if (fp->flag & FA__WRITTEN) {   /* Has the file been written? */
2648 #if !_FS_TINY   /* Write-back dirty buffer */
2649                         if (fp->flag & FA__DIRTY) {
2650                                 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2651                                         LEAVE_FF(fp->fs, FR_DISK_ERR);
2652                                 fp->flag &= ~FA__DIRTY;
2653                         }
2654 #endif
2655                         /* Update the directory entry */
2656                         res = move_window(fp->fs, fp->dir_sect);
2657                         if (res == FR_OK) {
2658                                 dir = fp->dir_ptr;
2659                                 dir[DIR_Attr] |= AM_ARC;                                        /* Set archive bit */
2660                                 ST_DWORD(dir+DIR_FileSize, fp->fsize);          /* Update file size */
2661                                 st_clust(dir, fp->sclust);                                      /* Update start cluster */
2662                                 tim = get_fattime();                                            /* Update updated time */
2663                                 ST_DWORD(dir+DIR_WrtTime, tim);
2664                                 ST_WORD(dir+DIR_LstAccDate, 0);
2665                                 fp->flag &= ~FA__WRITTEN;
2666                                 fp->fs->wflag = 1;
2667                                 res = sync(fp->fs);
2668                         }
2669                 }
2670         }
2671
2672         LEAVE_FF(fp->fs, res);
2673 }
2674
2675 #endif /* !_FS_READONLY */
2676
2677
2678
2679
2680 /*-----------------------------------------------------------------------*/
2681 /* Close File                                                            */
2682 /*-----------------------------------------------------------------------*/
2683
2684 FRESULT f_close (
2685         FIL *fp         /* Pointer to the file object to be closed */
2686 )
2687 {
2688         FRESULT res;
2689
2690
2691 #if _FS_READONLY
2692         res = validate(fp);
2693         {
2694 #if _FS_REENTRANT
2695                 FATFS *fs = fp->fs;
2696 #endif
2697                 if (res == FR_OK) fp->fs = 0;   /* Discard file object */
2698                 LEAVE_FF(fs, res);
2699         }
2700 #else
2701         res = f_sync(fp);               /* Flush cached data */
2702 #if _FS_LOCK
2703         if (res == FR_OK) {             /* Decrement open counter */
2704 #if _FS_REENTRANT
2705                 FATFS *fs = fp->fs;;
2706                 res = validate(fp);
2707                 if (res == FR_OK) {
2708                         res = dec_lock(fp->lockid);
2709                         unlock_fs(fs, FR_OK);
2710                 }
2711 #else
2712                 res = dec_lock(fp->lockid);
2713 #endif
2714         }
2715 #endif
2716         if (res == FR_OK) fp->fs = 0;   /* Discard file object */
2717         return res;
2718 #endif
2719 }
2720
2721
2722
2723
2724 /*-----------------------------------------------------------------------*/
2725 /* Current Drive/Directory Handlings                                     */
2726 /*-----------------------------------------------------------------------*/
2727
2728 #if _FS_RPATH >= 1
2729
2730 FRESULT f_chdrive (
2731         BYTE drv                /* Drive number */
2732 )
2733 {
2734         if (drv >= _VOLUMES) return FR_INVALID_DRIVE;
2735
2736         CurrVol = drv;
2737
2738         return FR_OK;
2739 }
2740
2741
2742
2743 FRESULT f_chdir (
2744         const TCHAR *path       /* Pointer to the directory path */
2745 )
2746 {
2747         FRESULT res;
2748         DIR dj;
2749         DEF_NAMEBUF;
2750
2751
2752         res = chk_mounted(&path, &dj.fs, 0);
2753         if (res == FR_OK) {
2754                 INIT_BUF(dj);
2755                 res = follow_path(&dj, path);           /* Follow the path */
2756                 FREE_BUF();
2757                 if (res == FR_OK) {                                     /* Follow completed */
2758                         if (!dj.dir) {
2759                                 dj.fs->cdir = dj.sclust;        /* Start directory itself */
2760                         } else {
2761                                 if (dj.dir[DIR_Attr] & AM_DIR)  /* Reached to the directory */
2762                                         dj.fs->cdir = ld_clust(dj.fs, dj.dir);
2763                                 else
2764                                         res = FR_NO_PATH;               /* Reached but a file */
2765                         }
2766                 }
2767                 if (res == FR_NO_FILE) res = FR_NO_PATH;
2768         }
2769
2770         LEAVE_FF(dj.fs, res);
2771 }
2772
2773
2774 #if _FS_RPATH >= 2
2775 FRESULT f_getcwd (
2776         TCHAR *path,    /* Pointer to the directory path */
2777         UINT sz_path    /* Size of path */
2778 )
2779 {
2780         FRESULT res;
2781         DIR dj;
2782         UINT i, n;
2783         DWORD ccl;
2784         TCHAR *tp;
2785         FILINFO fno;
2786         DEF_NAMEBUF;
2787
2788
2789         *path = 0;
2790         res = chk_mounted((const TCHAR**)&path, &dj.fs, 0);     /* Get current volume */
2791         if (res == FR_OK) {
2792                 INIT_BUF(dj);
2793                 i = sz_path;            /* Bottom of buffer (dir stack base) */
2794                 dj.sclust = dj.fs->cdir;                        /* Start to follow upper dir from current dir */
2795                 while ((ccl = dj.sclust) != 0) {        /* Repeat while current dir is a sub-dir */
2796                         res = dir_sdi(&dj, 1);                  /* Get parent dir */
2797                         if (res != FR_OK) break;
2798                         res = dir_read(&dj);
2799                         if (res != FR_OK) break;
2800                         dj.sclust = ld_clust(dj.fs, dj.dir);    /* Goto parent dir */
2801                         res = dir_sdi(&dj, 0);
2802                         if (res != FR_OK) break;
2803                         do {                                                    /* Find the entry links to the child dir */
2804                                 res = dir_read(&dj);
2805                                 if (res != FR_OK) break;
2806                                 if (ccl == ld_clust(dj.fs, dj.dir)) break;      /* Found the entry */
2807                                 res = dir_next(&dj, 0);
2808                         } while (res == FR_OK);
2809                         if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
2810                         if (res != FR_OK) break;
2811 #if _USE_LFN
2812                         fno.lfname = path;
2813                         fno.lfsize = i;
2814 #endif
2815                         get_fileinfo(&dj, &fno);                /* Get the dir name and push it to the buffer */
2816                         tp = fno.fname;
2817                         if (_USE_LFN && *path) tp = path;
2818                         for (n = 0; tp[n]; n++) ;
2819                         if (i < n + 3) {
2820                                 res = FR_NOT_ENOUGH_CORE; break;
2821                         }
2822                         while (n) path[--i] = tp[--n];
2823                         path[--i] = '/';
2824                 }
2825                 tp = path;
2826                 if (res == FR_OK) {
2827                         *tp++ = '0' + CurrVol;                  /* Put drive number */
2828                         *tp++ = ':';
2829                         if (i == sz_path) {                             /* Root-dir */
2830                                 *tp++ = '/';
2831                         } else {                                                /* Sub-dir */
2832                                 do              /* Add stacked path str */
2833                                         *tp++ = path[i++];
2834                                 while (i < sz_path);
2835                         }
2836                 }
2837                 *tp = 0;
2838                 FREE_BUF();
2839         }
2840
2841         LEAVE_FF(dj.fs, res);
2842 }
2843 #endif /* _FS_RPATH >= 2 */
2844 #endif /* _FS_RPATH >= 1 */
2845
2846
2847
2848 #if _FS_MINIMIZE <= 2
2849 /*-----------------------------------------------------------------------*/
2850 /* Seek File R/W Pointer                                                 */
2851 /*-----------------------------------------------------------------------*/
2852
2853 FRESULT f_lseek (
2854         FIL *fp,                /* Pointer to the file object */
2855         DWORD ofs               /* File pointer from top of file */
2856 )
2857 {
2858         FRESULT res;
2859
2860
2861         res = validate(fp);                                     /* Check validity of the object */
2862         if (res != FR_OK) LEAVE_FF(fp->fs, res);
2863         if (fp->flag & FA__ERROR)                       /* Check abort flag */
2864                 LEAVE_FF(fp->fs, FR_INT_ERR);
2865
2866 #if _USE_FASTSEEK
2867         if (fp->cltbl) {        /* Fast seek */
2868                 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
2869
2870                 if (ofs == CREATE_LINKMAP) {    /* Create CLMT */
2871                         tbl = fp->cltbl;
2872                         tlen = *tbl++; ulen = 2;        /* Given table size and required table size */
2873                         cl = fp->sclust;                        /* Top of the chain */
2874                         if (cl) {
2875                                 do {
2876                                         /* Get a fragment */
2877                                         tcl = cl; ncl = 0; ulen += 2;   /* Top, length and used items */
2878                                         do {
2879                                                 pcl = cl; ncl++;
2880                                                 cl = get_fat(fp->fs, cl);
2881                                                 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
2882                                                 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2883                                         } while (cl == pcl + 1);
2884                                         if (ulen <= tlen) {             /* Store the length and top of the fragment */
2885                                                 *tbl++ = ncl; *tbl++ = tcl;
2886                                         }
2887                                 } while (cl < fp->fs->n_fatent);        /* Repeat until end of chain */
2888                         }
2889                         *fp->cltbl = ulen;      /* Number of items used */
2890                         if (ulen <= tlen)
2891                                 *tbl = 0;               /* Terminate table */
2892                         else
2893                                 res = FR_NOT_ENOUGH_CORE;       /* Given table size is smaller than required */
2894
2895                 } else {                                                /* Fast seek */
2896                         if (ofs > fp->fsize)            /* Clip offset at the file size */
2897                                 ofs = fp->fsize;
2898                         fp->fptr = ofs;                         /* Set file pointer */
2899                         if (ofs) {
2900                                 fp->clust = clmt_clust(fp, ofs - 1);
2901                                 dsc = clust2sect(fp->fs, fp->clust);
2902                                 if (!dsc) ABORT(fp->fs, FR_INT_ERR);
2903                                 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
2904                                 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) {        /* Refill sector cache if needed */
2905 #if !_FS_TINY
2906 #if !_FS_READONLY
2907                                         if (fp->flag & FA__DIRTY) {             /* Write-back dirty sector cache */
2908                                                 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2909                                                         ABORT(fp->fs, FR_DISK_ERR);
2910                                                 fp->flag &= ~FA__DIRTY;
2911                                         }
2912 #endif
2913                                         if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK)  /* Load current sector */
2914                                                 ABORT(fp->fs, FR_DISK_ERR);
2915 #endif
2916                                         fp->dsect = dsc;
2917                                 }
2918                         }
2919                 }
2920         } else
2921 #endif
2922
2923         /* Normal Seek */
2924         {
2925                 DWORD clst, bcs, nsect, ifptr;
2926
2927                 if (ofs > fp->fsize                                     /* In read-only mode, clip offset with the file size */
2928 #if !_FS_READONLY
2929                          && !(fp->flag & FA_WRITE)
2930 #endif
2931                         ) ofs = fp->fsize;
2932
2933                 ifptr = fp->fptr;
2934                 fp->fptr = nsect = 0;
2935                 if (ofs) {
2936                         bcs = (DWORD)fp->fs->csize * SS(fp->fs);        /* Cluster size (byte) */
2937                         if (ifptr > 0 &&
2938                                 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
2939                                 fp->fptr = (ifptr - 1) & ~(bcs - 1);    /* start from the current cluster */
2940                                 ofs -= fp->fptr;
2941                                 clst = fp->clust;
2942                         } else {                                                                        /* When seek to back cluster, */
2943                                 clst = fp->sclust;                                              /* start from the first cluster */
2944 #if !_FS_READONLY
2945                                 if (clst == 0) {                                                /* If no cluster chain, create a new chain */
2946                                         clst = create_chain(fp->fs, 0);
2947                                         if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
2948                                         if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2949                                         fp->sclust = clst;
2950                                 }
2951 #endif
2952                                 fp->clust = clst;
2953                         }
2954                         if (clst != 0) {
2955                                 while (ofs > bcs) {                                             /* Cluster following loop */
2956 #if !_FS_READONLY
2957                                         if (fp->flag & FA_WRITE) {                      /* Check if in write mode or not */
2958                                                 clst = create_chain(fp->fs, clst);      /* Force stretch if in write mode */
2959                                                 if (clst == 0) {                                /* When disk gets full, clip file size */
2960                                                         ofs = bcs; break;
2961                                                 }
2962                                         } else
2963 #endif
2964                                                 clst = get_fat(fp->fs, clst);   /* Follow cluster chain if not in write mode */
2965                                         if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2966                                         if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
2967                                         fp->clust = clst;
2968                                         fp->fptr += bcs;
2969                                         ofs -= bcs;
2970                                 }
2971                                 fp->fptr += ofs;
2972                                 if (ofs % SS(fp->fs)) {
2973                                         nsect = clust2sect(fp->fs, clst);       /* Current sector */
2974                                         if (!nsect) ABORT(fp->fs, FR_INT_ERR);
2975                                         nsect += ofs / SS(fp->fs);
2976                                 }
2977                         }
2978                 }
2979                 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) {      /* Fill sector cache if needed */
2980 #if !_FS_TINY
2981 #if !_FS_READONLY
2982                         if (fp->flag & FA__DIRTY) {                     /* Write-back dirty sector cache */
2983                                 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2984                                         ABORT(fp->fs, FR_DISK_ERR);
2985                                 fp->flag &= ~FA__DIRTY;
2986                         }
2987 #endif
2988                         if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK)        /* Fill sector cache */
2989                                 ABORT(fp->fs, FR_DISK_ERR);
2990 #endif
2991                         fp->dsect = nsect;
2992                 }
2993 #if !_FS_READONLY
2994                 if (fp->fptr > fp->fsize) {                     /* Set file change flag if the file size is extended */
2995                         fp->fsize = fp->fptr;
2996                         fp->flag |= FA__WRITTEN;
2997                 }
2998 #endif
2999         }
3000
3001         LEAVE_FF(fp->fs, res);
3002 }
3003
3004
3005
3006 #if _FS_MINIMIZE <= 1
3007 /*-----------------------------------------------------------------------*/
3008 /* Create a Directory Object                                             */
3009 /*-----------------------------------------------------------------------*/
3010
3011 FRESULT f_opendir (
3012         DIR *dj,                        /* Pointer to directory object to create */
3013         const TCHAR *path       /* Pointer to the directory path */
3014 )
3015 {
3016         FRESULT res;
3017         FATFS *fs;
3018         DEF_NAMEBUF;
3019
3020
3021         if (!dj) return FR_INVALID_OBJECT;
3022
3023         res = chk_mounted(&path, &dj->fs, 0);
3024         fs = dj->fs;
3025         if (res == FR_OK) {
3026                 INIT_BUF(*dj);
3027                 res = follow_path(dj, path);                    /* Follow the path to the directory */
3028                 FREE_BUF();
3029                 if (res == FR_OK) {                                             /* Follow completed */
3030                         if (dj->dir) {                                          /* It is not the root dir */
3031                                 if (dj->dir[DIR_Attr] & AM_DIR) {       /* The object is a directory */
3032                                         dj->sclust = ld_clust(fs, dj->dir);
3033                                 } else {                                                /* The object is not a directory */
3034                                         res = FR_NO_PATH;
3035                                 }
3036                         }
3037                         if (res == FR_OK) {
3038                                 dj->id = fs->id;
3039                                 res = dir_sdi(dj, 0);                   /* Rewind dir */
3040                         }
3041                 }
3042                 if (res == FR_NO_FILE) res = FR_NO_PATH;
3043                 if (res != FR_OK) dj->fs = 0;                   /* Invalidate the dir object if function failed */
3044         } else {
3045                 dj->fs = 0;
3046         }
3047
3048         LEAVE_FF(fs, res);
3049 }
3050
3051
3052
3053
3054 /*-----------------------------------------------------------------------*/
3055 /* Read Directory Entry in Sequence                                      */
3056 /*-----------------------------------------------------------------------*/
3057
3058 FRESULT f_readdir (
3059         DIR *dj,                        /* Pointer to the open directory object */
3060         FILINFO *fno            /* Pointer to file information to return */
3061 )
3062 {
3063         FRESULT res;
3064         DEF_NAMEBUF;
3065
3066
3067         res = validate(dj);                                             /* Check validity of the object */
3068         if (res == FR_OK) {
3069                 if (!fno) {
3070                         res = dir_sdi(dj, 0);                   /* Rewind the directory object */
3071                 } else {
3072                         INIT_BUF(*dj);
3073                         res = dir_read(dj);                             /* Read an directory item */
3074                         if (res == FR_NO_FILE) {                /* Reached end of dir */
3075                                 dj->sect = 0;
3076                                 res = FR_OK;
3077                         }
3078                         if (res == FR_OK) {                             /* A valid entry is found */
3079                                 get_fileinfo(dj, fno);          /* Get the object information */
3080                                 res = dir_next(dj, 0);          /* Increment index for next */
3081                                 if (res == FR_NO_FILE) {
3082                                         dj->sect = 0;
3083                                         res = FR_OK;
3084                                 }
3085                         }
3086                         FREE_BUF();
3087                 }
3088         }
3089
3090         LEAVE_FF(dj->fs, res);
3091 }
3092
3093
3094
3095 #if _FS_MINIMIZE == 0
3096 /*-----------------------------------------------------------------------*/
3097 /* Get File Status                                                       */
3098 /*-----------------------------------------------------------------------*/
3099
3100 FRESULT f_stat (
3101         const TCHAR *path,      /* Pointer to the file path */
3102         FILINFO *fno            /* Pointer to file information to return */
3103 )
3104 {
3105         FRESULT res;
3106         DIR dj;
3107         DEF_NAMEBUF;
3108
3109
3110         res = chk_mounted(&path, &dj.fs, 0);
3111         if (res == FR_OK) {
3112                 INIT_BUF(dj);
3113                 res = follow_path(&dj, path);   /* Follow the file path */
3114                 if (res == FR_OK) {                             /* Follow completed */
3115                         if (dj.dir)             /* Found an object */
3116                                 get_fileinfo(&dj, fno);
3117                         else                    /* It is root dir */
3118                                 res = FR_INVALID_NAME;
3119                 }
3120                 FREE_BUF();
3121         }
3122
3123         LEAVE_FF(dj.fs, res);
3124 }
3125
3126
3127
3128 #if !_FS_READONLY
3129 /*-----------------------------------------------------------------------*/
3130 /* Get Number of Free Clusters                                           */
3131 /*-----------------------------------------------------------------------*/
3132
3133 FRESULT f_getfree (
3134         const TCHAR *path,      /* Pointer to the logical drive number (root dir) */
3135         DWORD *nclst,           /* Pointer to the variable to return number of free clusters */
3136         FATFS **fatfs           /* Pointer to pointer to corresponding file system object to return */
3137 )
3138 {
3139         FRESULT res;
3140         FATFS *fs;
3141         DWORD n, clst, sect, stat;
3142         UINT i;
3143         BYTE fat, *p;
3144
3145
3146         /* Get drive number */
3147         res = chk_mounted(&path, fatfs, 0);
3148         fs = *fatfs;
3149         if (res == FR_OK) {
3150                 /* If free_clust is valid, return it without full cluster scan */
3151                 if (fs->free_clust <= fs->n_fatent - 2) {
3152                         *nclst = fs->free_clust;
3153                 } else {
3154                         /* Get number of free clusters */
3155                         fat = fs->fs_type;
3156                         n = 0;
3157                         if (fat == FS_FAT12) {
3158                                 clst = 2;
3159                                 do {
3160                                         stat = get_fat(fs, clst);
3161                                         if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
3162                                         if (stat == 1) { res = FR_INT_ERR; break; }
3163                                         if (stat == 0) n++;
3164                                 } while (++clst < fs->n_fatent);
3165                         } else {
3166                                 clst = fs->n_fatent;
3167                                 sect = fs->fatbase;
3168                                 i = 0; p = 0;
3169                                 do {
3170                                         if (!i) {
3171                                                 res = move_window(fs, sect++);
3172                                                 if (res != FR_OK) break;
3173                                                 p = fs->win;
3174                                                 i = SS(fs);
3175                                         }
3176                                         if (fat == FS_FAT16) {
3177                                                 if (LD_WORD(p) == 0) n++;
3178                                                 p += 2; i -= 2;
3179                                         } else {
3180                                                 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
3181                                                 p += 4; i -= 4;
3182                                         }
3183                                 } while (--clst);
3184                         }
3185                         fs->free_clust = n;
3186                         if (fat == FS_FAT32) fs->fsi_flag = 1;
3187                         *nclst = n;
3188                 }
3189         }
3190         LEAVE_FF(fs, res);
3191 }
3192
3193
3194
3195
3196 /*-----------------------------------------------------------------------*/
3197 /* Truncate File                                                         */
3198 /*-----------------------------------------------------------------------*/
3199
3200 FRESULT f_truncate (
3201         FIL *fp         /* Pointer to the file object */
3202 )
3203 {
3204         FRESULT res;
3205         DWORD ncl;
3206
3207
3208         if (!fp) return FR_INVALID_OBJECT;
3209
3210         res = validate(fp);                                             /* Check validity of the object */
3211         if (res == FR_OK) {
3212                 if (fp->flag & FA__ERROR) {                     /* Check abort flag */
3213                         res = FR_INT_ERR;
3214                 } else {
3215                         if (!(fp->flag & FA_WRITE))             /* Check access mode */
3216                                 res = FR_DENIED;
3217                 }
3218         }
3219         if (res == FR_OK) {
3220                 if (fp->fsize > fp->fptr) {
3221                         fp->fsize = fp->fptr;   /* Set file size to current R/W point */
3222                         fp->flag |= FA__WRITTEN;
3223                         if (fp->fptr == 0) {    /* When set file size to zero, remove entire cluster chain */
3224                                 res = remove_chain(fp->fs, fp->sclust);
3225                                 fp->sclust = 0;
3226                         } else {                                /* When truncate a part of the file, remove remaining clusters */
3227                                 ncl = get_fat(fp->fs, fp->clust);
3228                                 res = FR_OK;
3229                                 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
3230                                 if (ncl == 1) res = FR_INT_ERR;
3231                                 if (res == FR_OK && ncl < fp->fs->n_fatent) {
3232                                         res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF);
3233                                         if (res == FR_OK) res = remove_chain(fp->fs, ncl);
3234                                 }
3235                         }
3236                 }
3237                 if (res != FR_OK) fp->flag |= FA__ERROR;
3238         }
3239
3240         LEAVE_FF(fp->fs, res);
3241 }
3242
3243
3244
3245
3246 /*-----------------------------------------------------------------------*/
3247 /* Delete a File or Directory                                            */
3248 /*-----------------------------------------------------------------------*/
3249
3250 FRESULT f_unlink (
3251         const TCHAR *path               /* Pointer to the file or directory path */
3252 )
3253 {
3254         FRESULT res;
3255         DIR dj, sdj;
3256         BYTE *dir;
3257         DWORD dclst;
3258         DEF_NAMEBUF;
3259
3260
3261         res = chk_mounted(&path, &dj.fs, 1);
3262         if (res == FR_OK) {
3263                 INIT_BUF(dj);
3264                 res = follow_path(&dj, path);           /* Follow the file path */
3265                 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
3266                         res = FR_INVALID_NAME;                  /* Cannot remove dot entry */
3267 #if _FS_LOCK
3268                 if (res == FR_OK) res = chk_lock(&dj, 2);       /* Cannot remove open file */
3269 #endif
3270                 if (res == FR_OK) {                                     /* The object is accessible */
3271                         dir = dj.dir;
3272                         if (!dir) {
3273                                 res = FR_INVALID_NAME;          /* Cannot remove the start directory */
3274                         } else {
3275                                 if (dir[DIR_Attr] & AM_RDO)
3276                                         res = FR_DENIED;                /* Cannot remove R/O object */
3277                         }
3278                         dclst = ld_clust(dj.fs, dir);
3279                         if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */
3280                                 if (dclst < 2) {
3281                                         res = FR_INT_ERR;
3282                                 } else {
3283                                         mem_cpy(&sdj, &dj, sizeof (DIR));       /* Check if the sub-dir is empty or not */
3284                                         sdj.sclust = dclst;
3285                                         res = dir_sdi(&sdj, 2);         /* Exclude dot entries */
3286                                         if (res == FR_OK) {
3287                                                 res = dir_read(&sdj);
3288                                                 if (res == FR_OK                /* Not empty dir */
3289 #if _FS_RPATH
3290                                                 || dclst == dj.fs->cdir /* Current dir */
3291 #endif
3292                                                 ) res = FR_DENIED;
3293                                                 if (res == FR_NO_FILE) res = FR_OK;     /* Empty */
3294                                         }
3295                                 }
3296                         }
3297                         if (res == FR_OK) {
3298                                 res = dir_remove(&dj);          /* Remove the directory entry */
3299                                 if (res == FR_OK) {
3300                                         if (dclst)                              /* Remove the cluster chain if exist */
3301                                                 res = remove_chain(dj.fs, dclst);
3302                                         if (res == FR_OK) res = sync(dj.fs);
3303                                 }
3304                         }
3305                 }
3306                 FREE_BUF();
3307         }
3308         LEAVE_FF(dj.fs, res);
3309 }
3310
3311
3312
3313
3314 /*-----------------------------------------------------------------------*/
3315 /* Create a Directory                                                    */
3316 /*-----------------------------------------------------------------------*/
3317
3318 FRESULT f_mkdir (
3319         const TCHAR *path               /* Pointer to the directory path */
3320 )
3321 {
3322         FRESULT res;
3323         DIR dj;
3324         BYTE *dir, n;
3325         DWORD dsc, dcl, pcl, tim = get_fattime();
3326         DEF_NAMEBUF;
3327
3328
3329         res = chk_mounted(&path, &dj.fs, 1);
3330         if (res == FR_OK) {
3331                 INIT_BUF(dj);
3332                 res = follow_path(&dj, path);                   /* Follow the file path */
3333                 if (res == FR_OK) res = FR_EXIST;               /* Any object with same name is already existing */
3334                 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT))
3335                         res = FR_INVALID_NAME;
3336                 if (res == FR_NO_FILE) {                                /* Can create a new directory */
3337                         dcl = create_chain(dj.fs, 0);           /* Allocate a cluster for the new directory table */
3338                         res = FR_OK;
3339                         if (dcl == 0) res = FR_DENIED;          /* No space to allocate a new cluster */
3340                         if (dcl == 1) res = FR_INT_ERR;
3341                         if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
3342                         if (res == FR_OK)                                       /* Flush FAT */
3343                                 res = move_window(dj.fs, 0);
3344                         if (res == FR_OK) {                                     /* Initialize the new directory table */
3345                                 dsc = clust2sect(dj.fs, dcl);
3346                                 dir = dj.fs->win;
3347                                 mem_set(dir, 0, SS(dj.fs));
3348                                 mem_set(dir+DIR_Name, ' ', 8+3);        /* Create "." entry */
3349                                 dir[DIR_Name] = '.';
3350                                 dir[DIR_Attr] = AM_DIR;
3351                                 ST_DWORD(dir+DIR_WrtTime, tim);
3352                                 st_clust(dir, dcl);
3353                                 mem_cpy(dir+SZ_DIR, dir, SZ_DIR);       /* Create ".." entry */
3354                                 dir[33] = '.'; pcl = dj.sclust;
3355                                 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
3356                                         pcl = 0;
3357                                 st_clust(dir+SZ_DIR, pcl);
3358                                 for (n = dj.fs->csize; n; n--) {        /* Write dot entries and clear following sectors */
3359                                         dj.fs->winsect = dsc++;
3360                                         dj.fs->wflag = 1;
3361                                         res = move_window(dj.fs, 0);
3362                                         if (res != FR_OK) break;
3363                                         mem_set(dir, 0, SS(dj.fs));
3364                                 }
3365                         }
3366                         if (res == FR_OK) res = dir_register(&dj);      /* Register the object to the directory */
3367                         if (res != FR_OK) {
3368                                 remove_chain(dj.fs, dcl);                       /* Could not register, remove cluster chain */
3369                         } else {
3370                                 dir = dj.dir;
3371                                 dir[DIR_Attr] = AM_DIR;                         /* Attribute */
3372                                 ST_DWORD(dir+DIR_WrtTime, tim);         /* Created time */
3373                                 st_clust(dir, dcl);                                     /* Table start cluster */
3374                                 dj.fs->wflag = 1;
3375                                 res = sync(dj.fs);
3376                         }
3377                 }
3378                 FREE_BUF();
3379         }
3380
3381         LEAVE_FF(dj.fs, res);
3382 }
3383
3384
3385
3386
3387 /*-----------------------------------------------------------------------*/
3388 /* Change Attribute                                                      */
3389 /*-----------------------------------------------------------------------*/
3390
3391 FRESULT f_chmod (
3392         const TCHAR *path,      /* Pointer to the file path */
3393         BYTE value,                     /* Attribute bits */
3394         BYTE mask                       /* Attribute mask to change */
3395 )
3396 {
3397         FRESULT res;
3398         DIR dj;
3399         BYTE *dir;
3400         DEF_NAMEBUF;
3401
3402
3403         res = chk_mounted(&path, &dj.fs, 1);
3404         if (res == FR_OK) {
3405                 INIT_BUF(dj);
3406                 res = follow_path(&dj, path);           /* Follow the file path */
3407                 FREE_BUF();
3408                 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
3409                         res = FR_INVALID_NAME;
3410                 if (res == FR_OK) {
3411                         dir = dj.dir;
3412                         if (!dir) {                                             /* Is it a root directory? */
3413                                 res = FR_INVALID_NAME;
3414                         } else {                                                /* File or sub directory */
3415                                 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC;    /* Valid attribute mask */
3416                                 dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
3417                                 dj.fs->wflag = 1;
3418                                 res = sync(dj.fs);
3419                         }
3420                 }
3421         }
3422
3423         LEAVE_FF(dj.fs, res);
3424 }
3425
3426
3427
3428
3429 /*-----------------------------------------------------------------------*/
3430 /* Change Timestamp                                                      */
3431 /*-----------------------------------------------------------------------*/
3432
3433 FRESULT f_utime (
3434         const TCHAR *path,      /* Pointer to the file/directory name */
3435         const FILINFO *fno      /* Pointer to the time stamp to be set */
3436 )
3437 {
3438         FRESULT res;
3439         DIR dj;
3440         BYTE *dir;
3441         DEF_NAMEBUF;
3442
3443
3444         res = chk_mounted(&path, &dj.fs, 1);
3445         if (res == FR_OK) {
3446                 INIT_BUF(dj);
3447                 res = follow_path(&dj, path);   /* Follow the file path */
3448                 FREE_BUF();
3449                 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
3450                         res = FR_INVALID_NAME;
3451                 if (res == FR_OK) {
3452                         dir = dj.dir;
3453                         if (!dir) {                                     /* Root directory */
3454                                 res = FR_INVALID_NAME;
3455                         } else {                                        /* File or sub-directory */
3456                                 ST_WORD(dir+DIR_WrtTime, fno->ftime);
3457                                 ST_WORD(dir+DIR_WrtDate, fno->fdate);
3458                                 dj.fs->wflag = 1;
3459                                 res = sync(dj.fs);
3460                         }
3461                 }
3462         }
3463
3464         LEAVE_FF(dj.fs, res);
3465 }
3466
3467
3468
3469
3470 /*-----------------------------------------------------------------------*/
3471 /* Rename File/Directory                                                 */
3472 /*-----------------------------------------------------------------------*/
3473
3474 FRESULT f_rename (
3475         const TCHAR *path_old,  /* Pointer to the old name */
3476         const TCHAR *path_new   /* Pointer to the new name */
3477 )
3478 {
3479         FRESULT res;
3480         DIR djo, djn;
3481         BYTE buf[21], *dir;
3482         DWORD dw;
3483         DEF_NAMEBUF;
3484
3485
3486         res = chk_mounted(&path_old, &djo.fs, 1);
3487         if (res == FR_OK) {
3488                 djn.fs = djo.fs;
3489                 INIT_BUF(djo);
3490                 res = follow_path(&djo, path_old);              /* Check old object */
3491                 if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT))
3492                         res = FR_INVALID_NAME;
3493 #if _FS_LOCK
3494                 if (res == FR_OK) res = chk_lock(&djo, 2);
3495 #endif
3496                 if (res == FR_OK) {                                             /* Old object is found */
3497                         if (!djo.dir) {                                         /* Is root dir? */
3498                                 res = FR_NO_FILE;
3499                         } else {
3500                                 mem_cpy(buf, djo.dir+DIR_Attr, 21);             /* Save the object information except for name */
3501                                 mem_cpy(&djn, &djo, sizeof (DIR));              /* Check new object */
3502                                 res = follow_path(&djn, path_new);
3503                                 if (res == FR_OK) res = FR_EXIST;               /* The new object name is already existing */
3504                                 if (res == FR_NO_FILE) {                                /* Is it a valid path and no name collision? */
3505 /* Start critical section that an interruption or error can cause cross-link */
3506                                         res = dir_register(&djn);                       /* Register the new entry */
3507                                         if (res == FR_OK) {
3508                                                 dir = djn.dir;                                  /* Copy object information except for name */
3509                                                 mem_cpy(dir+13, buf+2, 19);
3510                                                 dir[DIR_Attr] = buf[0] | AM_ARC;
3511                                                 djo.fs->wflag = 1;
3512                                                 if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) {             /* Update .. entry in the directory if needed */
3513                                                         dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
3514                                                         if (!dw) {
3515                                                                 res = FR_INT_ERR;
3516                                                         } else {
3517                                                                 res = move_window(djo.fs, dw);
3518                                                                 dir = djo.fs->win+SZ_DIR;       /* .. entry */
3519                                                                 if (res == FR_OK && dir[1] == '.') {
3520                                                                         dw = (djo.fs->fs_type == FS_FAT32 && djn.sclust == djo.fs->dirbase) ? 0 : djn.sclust;
3521                                                                         st_clust(dir, dw);
3522                                                                         djo.fs->wflag = 1;
3523                                                                 }
3524                                                         }
3525                                                 }
3526                                                 if (res == FR_OK) {
3527                                                         res = dir_remove(&djo);         /* Remove old entry */
3528                                                         if (res == FR_OK)
3529                                                                 res = sync(djo.fs);
3530                                                 }
3531                                         }
3532 /* End critical section */
3533                                 }
3534                         }
3535                 }
3536                 FREE_BUF();
3537         }
3538         LEAVE_FF(djo.fs, res);
3539 }
3540
3541 #endif /* !_FS_READONLY */
3542 #endif /* _FS_MINIMIZE == 0 */
3543 #endif /* _FS_MINIMIZE <= 1 */
3544 #endif /* _FS_MINIMIZE <= 2 */
3545
3546
3547
3548 /*-----------------------------------------------------------------------*/
3549 /* Forward data to the stream directly (available on only tiny cfg)      */
3550 /*-----------------------------------------------------------------------*/
3551 #if _USE_FORWARD && _FS_TINY
3552
3553 FRESULT f_forward (
3554         FIL *fp,                                                /* Pointer to the file object */
3555         UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
3556         UINT btr,                                               /* Number of bytes to forward */
3557         UINT *bf                                                /* Pointer to number of bytes forwarded */
3558 )
3559 {
3560         FRESULT res;
3561         DWORD remain, clst, sect;
3562         UINT rcnt;
3563         BYTE csect;
3564
3565
3566         *bf = 0;        /* Clear transfer byte counter */
3567
3568         if (!fp) return FR_INVALID_OBJECT;
3569
3570         res = validate(fp);                                                             /* Check validity of the object */
3571         if (res != FR_OK) LEAVE_FF(fp->fs, res);
3572         if (fp->flag & FA__ERROR)                                               /* Check error flag */
3573                 LEAVE_FF(fp->fs, FR_INT_ERR);
3574         if (!(fp->flag & FA_READ))                                              /* Check access mode */
3575                 LEAVE_FF(fp->fs, FR_DENIED);
3576
3577         remain = fp->fsize - fp->fptr;
3578         if (btr > remain) btr = (UINT)remain;                   /* Truncate btr by remaining bytes */
3579
3580         for ( ;  btr && (*func)(0, 0);                                  /* Repeat until all data transferred or stream becomes busy */
3581                 fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) {
3582                 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1));    /* Sector offset in the cluster */
3583                 if ((fp->fptr % SS(fp->fs)) == 0) {                     /* On the sector boundary? */
3584                         if (!csect) {                                                   /* On the cluster boundary? */
3585                                 clst = (fp->fptr == 0) ?                        /* On the top of the file? */
3586                                         fp->sclust : get_fat(fp->fs, fp->clust);
3587                                 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
3588                                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3589                                 fp->clust = clst;                                       /* Update current cluster */
3590                         }
3591                 }
3592                 sect = clust2sect(fp->fs, fp->clust);           /* Get current data sector */
3593                 if (!sect) ABORT(fp->fs, FR_INT_ERR);
3594                 sect += csect;
3595                 if (move_window(fp->fs, sect))                          /* Move sector window */
3596                         ABORT(fp->fs, FR_DISK_ERR);
3597                 fp->dsect = sect;
3598                 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs));      /* Forward data from sector window */
3599                 if (rcnt > btr) rcnt = btr;
3600                 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
3601                 if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
3602         }
3603
3604         LEAVE_FF(fp->fs, FR_OK);
3605 }
3606 #endif /* _USE_FORWARD */
3607
3608
3609
3610 #if _USE_MKFS && !_FS_READONLY
3611 /*-----------------------------------------------------------------------*/
3612 /* Create File System on the Drive                                       */
3613 /*-----------------------------------------------------------------------*/
3614 #define N_ROOTDIR       512             /* Number of root dir entries for FAT12/16 */
3615 #define N_FATS          1               /* Number of FAT copies (1 or 2) */
3616
3617
3618 FRESULT f_mkfs (
3619         BYTE drv,               /* Logical drive number */
3620         BYTE sfd,               /* Partitioning rule 0:FDISK, 1:SFD */
3621         UINT au                 /* Allocation unit size [bytes] */
3622 )
3623 {
3624         static const WORD vst[] = { 1024,   512,  256,  128,   64,    32,   16,    8,    4,    2,   0};
3625         static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
3626         BYTE fmt, md, sys, *tbl, pdrv, part;
3627         DWORD n_clst, vs, n, wsect;
3628         UINT i;
3629         DWORD b_vol, b_fat, b_dir, b_data;      /* LBA */
3630         DWORD n_vol, n_rsv, n_fat, n_dir;       /* Size */
3631         FATFS *fs;
3632         DSTATUS stat;
3633
3634
3635         /* Check mounted drive and clear work area */
3636         if (drv >= _VOLUMES) return FR_INVALID_DRIVE;
3637         if (sfd > 1) return FR_INVALID_PARAMETER;
3638         if (au & (au - 1)) return FR_INVALID_PARAMETER;
3639         fs = FatFs[drv];
3640         if (!fs) return FR_NOT_ENABLED;
3641         fs->fs_type = 0;
3642         pdrv = LD2PD(drv);      /* Physical drive */
3643         part = LD2PT(drv);      /* Partition (0:auto detect, 1-4:get from partition table)*/
3644
3645         /* Get disk statics */
3646         stat = disk_initialize(pdrv);
3647         if (stat & STA_NOINIT) return FR_NOT_READY;
3648         if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
3649 #if _MAX_SS != 512                                      /* Get disk sector size */
3650         if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS)
3651                 return FR_DISK_ERR;
3652 #endif
3653         if (_MULTI_PARTITION && part) {
3654                 /* Get partition information from partition table in the MBR */
3655                 if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
3656                 if (LD_WORD(fs->win+BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
3657                 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
3658                 if (!tbl[4]) return FR_MKFS_ABORTED;    /* No partition? */
3659                 b_vol = LD_DWORD(tbl+8);        /* Volume start sector */
3660                 n_vol = LD_DWORD(tbl+12);       /* Volume size */
3661         } else {
3662                 /* Create a partition in this function */
3663                 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128)
3664                         return FR_DISK_ERR;
3665                 b_vol = (sfd) ? 0 : 63;         /* Volume start sector */
3666                 n_vol -= b_vol;                         /* Volume size */
3667         }
3668
3669         if (!au) {                              /* AU auto selection */
3670                 vs = n_vol / (2000 / (SS(fs) / 512));
3671                 for (i = 0; vs < vst[i]; i++) ;
3672                 au = cst[i];
3673         }
3674         au /= SS(fs);           /* Number of sectors per cluster */
3675         if (au == 0) au = 1;
3676         if (au > 128) au = 128;
3677
3678         /* Pre-compute number of clusters and FAT sub-type */
3679         n_clst = n_vol / au;
3680         fmt = FS_FAT12;
3681         if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
3682         if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
3683
3684         /* Determine offset and size of FAT structure */
3685         if (fmt == FS_FAT32) {
3686                 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
3687                 n_rsv = 32;
3688                 n_dir = 0;
3689         } else {
3690                 n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
3691                 n_fat = (n_fat + SS(fs) - 1) / SS(fs);
3692                 n_rsv = 1;
3693                 n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs);
3694         }
3695         b_fat = b_vol + n_rsv;                          /* FAT area start sector */
3696         b_dir = b_fat + n_fat * N_FATS;         /* Directory area start sector */
3697         b_data = b_dir + n_dir;                         /* Data area start sector */
3698         if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED;        /* Too small volume */
3699
3700         /* Align data start sector to erase block boundary (for flash memory media) */
3701         if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1;
3702         n = (b_data + n - 1) & ~(n - 1);        /* Next nearest erase block from current data start */
3703         n = (n - b_data) / N_FATS;
3704         if (fmt == FS_FAT32) {          /* FAT32: Move FAT offset */
3705                 n_rsv += n;
3706                 b_fat += n;
3707         } else {                                        /* FAT12/16: Expand FAT size */
3708                 n_fat += n;
3709         }
3710
3711         /* Determine number of clusters and final check of validity of the FAT sub-type */
3712         n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
3713         if (   (fmt == FS_FAT16 && n_clst < MIN_FAT16)
3714                 || (fmt == FS_FAT32 && n_clst < MIN_FAT32))
3715                 return FR_MKFS_ABORTED;
3716
3717         switch (fmt) {  /* Determine system ID for partition table */
3718         case FS_FAT12:  sys = 0x01; break;
3719         case FS_FAT16:  sys = (n_vol < 0x10000) ? 0x04 : 0x06; break;
3720         default:                sys = 0x0C;
3721         }
3722
3723         if (_MULTI_PARTITION && part) {
3724                 /* Update system ID in the partition table */
3725                 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
3726                 tbl[4] = sys;
3727                 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
3728                 md = 0xF8;
3729         } else {
3730                 if (sfd) {      /* No partition table (SFD) */
3731                         md = 0xF0;
3732                 } else {        /* Create partition table (FDISK) */
3733                         mem_set(fs->win, 0, SS(fs));
3734                         tbl = fs->win+MBR_Table;        /* Create partition table for single partition in the drive */
3735                         tbl[1] = 1;                                             /* Partition start head */
3736                         tbl[2] = 1;                                             /* Partition start sector */
3737                         tbl[3] = 0;                                             /* Partition start cylinder */
3738                         tbl[4] = sys;                                   /* System type */
3739                         tbl[5] = 254;                                   /* Partition end head */
3740                         n = (b_vol + n_vol) / 63 / 255;
3741                         tbl[6] = (BYTE)((n >> 2) | 63); /* Partition end sector */
3742                         tbl[7] = (BYTE)n;                               /* End cylinder */
3743                         ST_DWORD(tbl+8, 63);                    /* Partition start in LBA */
3744                         ST_DWORD(tbl+12, n_vol);                /* Partition size in LBA */
3745                         ST_WORD(fs->win+BS_55AA, 0xAA55);       /* MBR signature */
3746                         if (disk_write(pdrv, fs->win, 0, 1) != RES_OK)  /* Write it to the MBR sector */
3747                                 return FR_DISK_ERR;
3748                         md = 0xF8;
3749                 }
3750         }
3751
3752         /* Create BPB in the VBR */
3753         tbl = fs->win;                                                  /* Clear sector */
3754         mem_set(tbl, 0, SS(fs));
3755         mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
3756         i = SS(fs);                                                             /* Sector size */
3757         ST_WORD(tbl+BPB_BytsPerSec, i);
3758         tbl[BPB_SecPerClus] = (BYTE)au;                 /* Sectors per cluster */
3759         ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv);             /* Reserved sectors */
3760         tbl[BPB_NumFATs] = N_FATS;                              /* Number of FATs */
3761         i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR;  /* Number of rootdir entries */
3762         ST_WORD(tbl+BPB_RootEntCnt, i);
3763         if (n_vol < 0x10000) {                                  /* Number of total sectors */
3764                 ST_WORD(tbl+BPB_TotSec16, n_vol);
3765         } else {
3766                 ST_DWORD(tbl+BPB_TotSec32, n_vol);
3767         }
3768         tbl[BPB_Media] = md;                                    /* Media descriptor */
3769         ST_WORD(tbl+BPB_SecPerTrk, 63);                 /* Number of sectors per track */
3770         ST_WORD(tbl+BPB_NumHeads, 255);                 /* Number of heads */
3771         ST_DWORD(tbl+BPB_HiddSec, b_vol);               /* Hidden sectors */
3772         n = get_fattime();                                              /* Use current time as VSN */
3773         if (fmt == FS_FAT32) {
3774                 ST_DWORD(tbl+BS_VolID32, n);            /* VSN */
3775                 ST_DWORD(tbl+BPB_FATSz32, n_fat);       /* Number of sectors per FAT */
3776                 ST_DWORD(tbl+BPB_RootClus, 2);          /* Root directory start cluster (2) */
3777                 ST_WORD(tbl+BPB_FSInfo, 1);                     /* FSInfo record offset (VBR+1) */
3778                 ST_WORD(tbl+BPB_BkBootSec, 6);          /* Backup boot record offset (VBR+6) */
3779                 tbl[BS_DrvNum32] = 0x80;                        /* Drive number */
3780                 tbl[BS_BootSig32] = 0x29;                       /* Extended boot signature */
3781                 mem_cpy(tbl+BS_VolLab32, "NO NAME    " "FAT32   ", 19); /* Volume label, FAT signature */
3782         } else {
3783                 ST_DWORD(tbl+BS_VolID, n);                      /* VSN */
3784                 ST_WORD(tbl+BPB_FATSz16, n_fat);        /* Number of sectors per FAT */
3785                 tbl[BS_DrvNum] = 0x80;                          /* Drive number */
3786                 tbl[BS_BootSig] = 0x29;                         /* Extended boot signature */
3787                 mem_cpy(tbl+BS_VolLab, "NO NAME    " "FAT     ", 19);   /* Volume label, FAT signature */
3788         }
3789         ST_WORD(tbl+BS_55AA, 0xAA55);                   /* Signature (Offset is fixed here regardless of sector size) */
3790         if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK)  /* Write it to the VBR sector */
3791                 return FR_DISK_ERR;
3792         if (fmt == FS_FAT32)                                                    /* Write backup VBR if needed (VBR+6) */
3793                 disk_write(pdrv, tbl, b_vol + 6, 1);
3794
3795         /* Initialize FAT area */
3796         wsect = b_fat;
3797         for (i = 0; i < N_FATS; i++) {          /* Initialize each FAT copy */
3798                 mem_set(tbl, 0, SS(fs));                        /* 1st sector of the FAT  */
3799                 n = md;                                                         /* Media descriptor byte */
3800                 if (fmt != FS_FAT32) {
3801                         n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
3802                         ST_DWORD(tbl+0, n);                             /* Reserve cluster #0-1 (FAT12/16) */
3803                 } else {
3804                         n |= 0xFFFFFF00;
3805                         ST_DWORD(tbl+0, n);                             /* Reserve cluster #0-1 (FAT32) */
3806                         ST_DWORD(tbl+4, 0xFFFFFFFF);
3807                         ST_DWORD(tbl+8, 0x0FFFFFFF);    /* Reserve cluster #2 for root dir */
3808                 }
3809                 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
3810                         return FR_DISK_ERR;
3811                 mem_set(tbl, 0, SS(fs));                        /* Fill following FAT entries with zero */
3812                 for (n = 1; n < n_fat; n++) {           /* This loop may take a time on FAT32 volume due to many single sector writes */
3813                         if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
3814                                 return FR_DISK_ERR;
3815                 }
3816         }
3817
3818         /* Initialize root directory */
3819         i = (fmt == FS_FAT32) ? au : n_dir;
3820         do {
3821                 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
3822                         return FR_DISK_ERR;
3823         } while (--i);
3824
3825 #if _USE_ERASE  /* Erase data area if needed */
3826         {
3827                 DWORD eb[2];
3828
3829                 eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1;
3830                 disk_ioctl(pdrv, CTRL_ERASE_SECTOR, eb);
3831         }
3832 #endif
3833
3834         /* Create FSInfo if needed */
3835         if (fmt == FS_FAT32) {
3836                 ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
3837                 ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
3838                 ST_DWORD(tbl+FSI_Free_Count, n_clst - 1);       /* Number of free clusters */
3839                 ST_DWORD(tbl+FSI_Nxt_Free, 2);                          /* Last allocated cluster# */
3840                 ST_WORD(tbl+BS_55AA, 0xAA55);
3841                 disk_write(pdrv, tbl, b_vol + 1, 1);    /* Write original (VBR+1) */
3842                 disk_write(pdrv, tbl, b_vol + 7, 1);    /* Write backup (VBR+7) */
3843         }
3844
3845         return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR;
3846 }
3847
3848
3849 #if _MULTI_PARTITION == 2
3850 /*-----------------------------------------------------------------------*/
3851 /* Divide Physical Drive                                                 */
3852 /*-----------------------------------------------------------------------*/
3853
3854 FRESULT f_fdisk (
3855         BYTE pdrv,                      /* Physical drive number */
3856         const DWORD szt[],      /* Pointer to the size table for each partitions */
3857         void* work                      /* Pointer to the working buffer */
3858 )
3859 {
3860         UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
3861         BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
3862         DSTATUS stat;
3863         DWORD sz_disk, sz_part, s_part;
3864
3865
3866         stat = disk_initialize(pdrv);
3867         if (stat & STA_NOINIT) return FR_NOT_READY;
3868         if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
3869         if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
3870
3871         /* Determine CHS in the table regardless of the drive geometry */
3872         for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
3873         if (n == 256) n--;
3874         e_hd = n - 1;
3875         sz_cyl = 63 * n;
3876         tot_cyl = sz_disk / sz_cyl;
3877
3878         /* Create partition table */
3879         mem_set(buf, 0, _MAX_SS);
3880         p = buf + MBR_Table; b_cyl = 0;
3881         for (i = 0; i < 4; i++, p += SZ_PTE) {
3882                 p_cyl = (szt[i] <= 100) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;
3883                 if (!p_cyl) continue;
3884                 s_part = (DWORD)sz_cyl * b_cyl;
3885                 sz_part = (DWORD)sz_cyl * p_cyl;
3886                 if (i == 0) {   /* Exclude first track of cylinder 0 */
3887                         s_hd = 1;
3888                         s_part += 63; sz_part -= 63;
3889                 } else {
3890                         s_hd = 0;
3891                 }
3892                 e_cyl = b_cyl + p_cyl - 1;
3893                 if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
3894
3895                 /* Set partition table */
3896                 p[1] = s_hd;                                            /* Start head */
3897                 p[2] = (BYTE)((b_cyl >> 2) + 1);        /* Start sector */
3898                 p[3] = (BYTE)b_cyl;                                     /* Start cylinder */
3899                 p[4] = 0x06;                                            /* System type (temporary setting) */
3900                 p[5] = e_hd;                                            /* End head */
3901                 p[6] = (BYTE)((e_cyl >> 2) + 63);       /* End sector */
3902                 p[7] = (BYTE)e_cyl;                                     /* End cylinder */
3903                 ST_DWORD(p + 8, s_part);                        /* Start sector in LBA */
3904                 ST_DWORD(p + 12, sz_part);                      /* Partition size */
3905
3906                 /* Next partition */
3907                 b_cyl += p_cyl;
3908         }
3909         ST_WORD(p, 0xAA55);
3910
3911         /* Write it to the MBR */
3912         return (disk_write(pdrv, buf, 0, 1) || disk_ioctl(pdrv, CTRL_SYNC, 0)) ? FR_DISK_ERR : FR_OK;
3913 }
3914
3915
3916 #endif /* _MULTI_PARTITION == 2 */
3917 #endif /* _USE_MKFS && !_FS_READONLY */
3918
3919
3920
3921
3922 #if _USE_STRFUNC
3923 /*-----------------------------------------------------------------------*/
3924 /* Get a string from the file                                            */
3925 /*-----------------------------------------------------------------------*/
3926 TCHAR* f_gets (
3927         TCHAR* buff,    /* Pointer to the string buffer to read */
3928         int len,                /* Size of string buffer (characters) */
3929         FIL* fil                /* Pointer to the file object */
3930 )
3931 {
3932         int n = 0;
3933         TCHAR c, *p = buff;
3934         BYTE s[2];
3935         UINT rc;
3936
3937
3938         while (n < len - 1) {                   /* Read bytes until buffer gets filled */
3939                 f_read(fil, s, 1, &rc);
3940                 if (rc != 1) break;                     /* Break on EOF or error */
3941                 c = s[0];
3942 #if _LFN_UNICODE                                        /* Read a character in UTF-8 encoding */
3943                 if (c >= 0x80) {
3944                         if (c < 0xC0) continue; /* Skip stray trailer */
3945                         if (c < 0xE0) {                 /* Two-byte sequence */
3946                                 f_read(fil, s, 1, &rc);
3947                                 if (rc != 1) break;
3948                                 c = ((c & 0x1F) << 6) | (s[0] & 0x3F);
3949                                 if (c < 0x80) c = '?';
3950                         } else {
3951                                 if (c < 0xF0) {         /* Three-byte sequence */
3952                                         f_read(fil, s, 2, &rc);
3953                                         if (rc != 2) break;
3954                                         c = (c << 12) | ((s[0] & 0x3F) << 6) | (s[1] & 0x3F);
3955                                         if (c < 0x800) c = '?';
3956                                 } else {                        /* Reject four-byte sequence */
3957                                         c = '?';
3958                                 }
3959                         }
3960                 }
3961 #endif
3962 #if _USE_STRFUNC >= 2
3963                 if (c == '\r') continue;        /* Strip '\r' */
3964 #endif
3965                 *p++ = c;
3966                 n++;
3967                 if (c == '\n') break;           /* Break on EOL */
3968         }
3969         *p = 0;
3970         return n ? buff : 0;                    /* When no data read (eof or error), return with error. */
3971 }
3972
3973
3974
3975 #if !_FS_READONLY
3976 #include <stdarg.h>
3977 /*-----------------------------------------------------------------------*/
3978 /* Put a character to the file                                           */
3979 /*-----------------------------------------------------------------------*/
3980 int f_putc (
3981         TCHAR c,        /* A character to be output */
3982         FIL* fil        /* Pointer to the file object */
3983 )
3984 {
3985         UINT bw, btw;
3986         BYTE s[3];
3987
3988
3989 #if _USE_STRFUNC >= 2
3990         if (c == '\n') f_putc ('\r', fil);      /* LF -> CRLF conversion */
3991 #endif
3992
3993 #if _LFN_UNICODE        /* Write the character in UTF-8 encoding */
3994         if (c < 0x80) {                 /* 7-bit */
3995                 s[0] = (BYTE)c;
3996                 btw = 1;
3997         } else {
3998                 if (c < 0x800) {        /* 11-bit */
3999                         s[0] = (BYTE)(0xC0 | (c >> 6));
4000                         s[1] = (BYTE)(0x80 | (c & 0x3F));
4001                         btw = 2;
4002                 } else {                        /* 16-bit */
4003                         s[0] = (BYTE)(0xE0 | (c >> 12));
4004                         s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F));
4005                         s[2] = (BYTE)(0x80 | (c & 0x3F));
4006                         btw = 3;
4007                 }
4008         }
4009 #else                           /* Write the character without conversion */
4010         s[0] = (BYTE)c;
4011         btw = 1;
4012 #endif
4013         f_write(fil, s, btw, &bw);              /* Write the char to the file */
4014         return (bw == btw) ? 1 : EOF;   /* Return the result */
4015 }
4016
4017
4018
4019
4020 /*-----------------------------------------------------------------------*/
4021 /* Put a string to the file                                              */
4022 /*-----------------------------------------------------------------------*/
4023 int f_puts (
4024         const TCHAR* str,       /* Pointer to the string to be output */
4025         FIL* fil                        /* Pointer to the file object */
4026 )
4027 {
4028         int n;
4029
4030
4031         for (n = 0; *str; str++, n++) {
4032                 if (f_putc(*str, fil) == EOF) return EOF;
4033         }
4034         return n;
4035 }
4036
4037
4038
4039
4040 /*-----------------------------------------------------------------------*/
4041 /* Put a formatted string to the file                                    */
4042 /*-----------------------------------------------------------------------*/
4043 int f_printf (
4044         FIL* fil,                       /* Pointer to the file object */
4045         const TCHAR* str,       /* Pointer to the format string */
4046         ...                                     /* Optional arguments... */
4047 )
4048 {
4049         va_list arp;
4050         BYTE f, r;
4051         UINT i, j, w;
4052         ULONG v;
4053         TCHAR c, d, s[16], *p;
4054         int res, chc, cc;
4055
4056
4057         va_start(arp, str);
4058
4059         for (cc = res = 0; cc != EOF; res += cc) {
4060                 c = *str++;
4061                 if (c == 0) break;                      /* End of string */
4062                 if (c != '%') {                         /* Non escape character */
4063                         cc = f_putc(c, fil);
4064                         if (cc != EOF) cc = 1;
4065                         continue;
4066                 }
4067                 w = f = 0;
4068                 c = *str++;
4069                 if (c == '0') {                         /* Flag: '0' padding */
4070                         f = 1; c = *str++;
4071                 } else {
4072                         if (c == '-') {                 /* Flag: left justified */
4073                                 f = 2; c = *str++;
4074                         }
4075                 }
4076                 while (IsDigit(c)) {            /* Precision */
4077                         w = w * 10 + c - '0';
4078                         c = *str++;
4079                 }
4080                 if (c == 'l' || c == 'L') {     /* Prefix: Size is long int */
4081                         f |= 4; c = *str++;
4082                 }
4083                 if (!c) break;
4084                 d = c;
4085                 if (IsLower(d)) d -= 0x20;
4086                 switch (d) {                            /* Type is... */
4087                 case 'S' :                                      /* String */
4088                         p = va_arg(arp, TCHAR*);
4089                         for (j = 0; p[j]; j++) ;
4090                         chc = 0;
4091                         if (!(f & 2)) {
4092                                 while (j++ < w) chc += (cc = f_putc(' ', fil));
4093                         }
4094                         chc += (cc = f_puts(p, fil));
4095                         while (j++ < w) chc += (cc = f_putc(' ', fil));
4096                         if (cc != EOF) cc = chc;
4097                         continue;
4098                 case 'C' :                                      /* Character */
4099                         cc = f_putc((TCHAR)va_arg(arp, int), fil); continue;
4100                 case 'B' :                                      /* Binary */
4101                         r = 2; break;
4102                 case 'O' :                                      /* Octal */
4103                         r = 8; break;
4104                 case 'D' :                                      /* Signed decimal */
4105                 case 'U' :                                      /* Unsigned decimal */
4106                         r = 10; break;
4107                 case 'X' :                                      /* Hexdecimal */
4108                         r = 16; break;
4109                 default:                                        /* Unknown type (pass-through) */
4110                         cc = f_putc(c, fil); continue;
4111                 }
4112
4113                 /* Get an argument and put it in numeral */
4114                 v = (f & 4) ? (ULONG)va_arg(arp, long) : ((d == 'D') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int));
4115                 if (d == 'D' && (v & 0x80000000)) {
4116                         v = 0 - v;
4117                         f |= 8;
4118                 }
4119                 i = 0;
4120                 do {
4121                         d = (TCHAR)(v % r); v /= r;
4122                         if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
4123                         s[i++] = d + '0';
4124                 } while (v && i < sizeof s / sizeof s[0]);
4125                 if (f & 8) s[i++] = '-';
4126                 j = i; d = (f & 1) ? '0' : ' ';
4127                 res = 0;
4128                 while (!(f & 2) && j++ < w) res += (cc = f_putc(d, fil));
4129                 do res += (cc = f_putc(s[--i], fil)); while(i);
4130                 while (j++ < w) res += (cc = f_putc(' ', fil));
4131                 if (cc != EOF) cc = res;
4132         }
4133
4134         va_end(arp);
4135         return (cc == EOF) ? cc : res;
4136 }
4137
4138 #endif /* !_FS_READONLY */
4139 #endif /* _USE_STRFUNC */