Rtos API example

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ff.cpp

00001 /*----------------------------------------------------------------------------/
00002 /  FatFs - FAT file system module  R0.11a                (C)ChaN, 2015        /
00003 /-----------------------------------------------------------------------------/
00004 / FatFs module is a free software that opened under license policy of
00005 / following conditions.
00006 /
00007 / Copyright (C) 2015, ChaN, all right reserved.
00008 /
00009 / 1. Redistributions of source code must retain the above copyright notice,
00010 /    this condition and the following disclaimer.
00011 /
00012 / This software is provided by the copyright holder and contributors "AS IS"
00013 / and any warranties related to this software are DISCLAIMED.
00014 / The copyright owner or contributors be NOT LIABLE for any damages caused
00015 / by use of this software.
00016 /----------------------------------------------------------------------------*/
00017 
00018 
00019 #include "ff.h"         /* Declarations of FatFs API */
00020 #include "diskio.h"     /* Declarations of disk I/O functions */
00021 
00022 
00023 /*--------------------------------------------------------------------------
00024 
00025    Module Private Definitions
00026 
00027 ---------------------------------------------------------------------------*/
00028 
00029 #if _FATFS != 64180 /* Revision ID */
00030 #error Wrong include file (ff.h).
00031 #endif
00032 
00033 
00034 /* Reentrancy related */
00035 #if _FS_REENTRANT
00036 #if _USE_LFN == 1
00037 #error Static LFN work area cannot be used at thread-safe configuration
00038 #endif
00039 #define ENTER_FF(fs)        { if (!lock_fs(fs)) return FR_TIMEOUT; }
00040 #define LEAVE_FF(fs, res)   { unlock_fs(fs, res); return res; }
00041 #else
00042 #define ENTER_FF(fs)
00043 #define LEAVE_FF(fs, res)   return res
00044 #endif
00045 
00046 #define ABORT(fs, res)      { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
00047 
00048 
00049 /* Definitions of sector size */
00050 #if (_MAX_SS < _MIN_SS) || (_MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096) || (_MIN_SS != 512 && _MIN_SS != 1024 && _MIN_SS != 2048 && _MIN_SS != 4096)
00051 #error Wrong sector size configuration
00052 #endif
00053 #if _MAX_SS == _MIN_SS
00054 #define SS(fs)  ((UINT)_MAX_SS) /* Fixed sector size */
00055 #else
00056 #define SS(fs)  ((fs)->ssize)   /* Variable sector size */
00057 #endif
00058 
00059 
00060 /* Timestamp feature */
00061 #if _FS_NORTC == 1
00062 #if _NORTC_YEAR < 1980 || _NORTC_YEAR > 2107 || _NORTC_MON < 1 || _NORTC_MON > 12 || _NORTC_MDAY < 1 || _NORTC_MDAY > 31
00063 #error Invalid _FS_NORTC settings
00064 #endif
00065 #define GET_FATTIME()   ((DWORD)(_NORTC_YEAR - 1980) << 25 | (DWORD)_NORTC_MON << 21 | (DWORD)_NORTC_MDAY << 16)
00066 #else
00067 #define GET_FATTIME()   get_fattime()
00068 #endif
00069 
00070 
00071 /* File access control feature */
00072 #if _FS_LOCK
00073 #if _FS_READONLY
00074 #error _FS_LOCK must be 0 at read-only configuration
00075 #endif
00076 typedef struct {
00077     FATFS *fs;      /* Object ID 1, volume (NULL:blank entry) */
00078     DWORD clu;      /* Object ID 2, directory (0:root) */
00079     WORD idx;       /* Object ID 3, directory index */
00080     WORD ctr;       /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
00081 } FILESEM;
00082 #endif
00083 
00084 
00085 
00086 /* DBCS code ranges and SBCS upper conversion tables */
00087 
00088 #if _CODE_PAGE == 932   /* Japanese Shift-JIS */
00089 #define _DF1S   0x81    /* DBC 1st byte range 1 start */
00090 #define _DF1E   0x9F    /* DBC 1st byte range 1 end */
00091 #define _DF2S   0xE0    /* DBC 1st byte range 2 start */
00092 #define _DF2E   0xFC    /* DBC 1st byte range 2 end */
00093 #define _DS1S   0x40    /* DBC 2nd byte range 1 start */
00094 #define _DS1E   0x7E    /* DBC 2nd byte range 1 end */
00095 #define _DS2S   0x80    /* DBC 2nd byte range 2 start */
00096 #define _DS2E   0xFC    /* DBC 2nd byte range 2 end */
00097 
00098 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
00099 #define _DF1S   0x81
00100 #define _DF1E   0xFE
00101 #define _DS1S   0x40
00102 #define _DS1E   0x7E
00103 #define _DS2S   0x80
00104 #define _DS2E   0xFE
00105 
00106 #elif _CODE_PAGE == 949 /* Korean */
00107 #define _DF1S   0x81
00108 #define _DF1E   0xFE
00109 #define _DS1S   0x41
00110 #define _DS1E   0x5A
00111 #define _DS2S   0x61
00112 #define _DS2E   0x7A
00113 #define _DS3S   0x81
00114 #define _DS3E   0xFE
00115 
00116 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
00117 #define _DF1S   0x81
00118 #define _DF1E   0xFE
00119 #define _DS1S   0x40
00120 #define _DS1E   0x7E
00121 #define _DS2S   0xA1
00122 #define _DS2E   0xFE
00123 
00124 #elif _CODE_PAGE == 437 /* U.S. */
00125 #define _DF1S   0
00126 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
00127                 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
00128                 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
00129                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00130                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00131                 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00132                 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
00133                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00134 
00135 #elif _CODE_PAGE == 720 /* Arabic */
00136 #define _DF1S   0
00137 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
00138                 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
00139                 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
00140                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00141                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00142                 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00143                 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
00144                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00145 
00146 #elif _CODE_PAGE == 737 /* Greek */
00147 #define _DF1S   0
00148 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
00149                 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
00150                 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \
00151                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00152                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00153                 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00154                 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
00155                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00156 
00157 #elif _CODE_PAGE == 771 /* KBL */
00158 #define _DF1S   0
00159 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
00160                 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
00161                 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
00162                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00163                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00164                 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \
00165                 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
00166                 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
00167 
00168 #elif _CODE_PAGE == 775 /* Baltic */
00169 #define _DF1S   0
00170 #define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \
00171                 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
00172                 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
00173                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00174                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00175                 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00176                 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \
00177                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00178 
00179 #elif _CODE_PAGE == 850 /* Latin 1 */
00180 #define _DF1S   0
00181 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
00182                 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
00183                 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
00184                 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00185                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00186                 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
00187                 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
00188                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00189 
00190 #elif _CODE_PAGE == 852 /* Latin 2 */
00191 #define _DF1S   0
00192 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \
00193                 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \
00194                 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \
00195                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
00196                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00197                 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00198                 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \
00199                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
00200 
00201 #elif _CODE_PAGE == 855 /* Cyrillic */
00202 #define _DF1S   0
00203 #define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \
00204                 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
00205                 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \
00206                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
00207                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00208                 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
00209                 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \
00210                 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
00211 
00212 #elif _CODE_PAGE == 857 /* Turkish */
00213 #define _DF1S   0
00214 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \
00215                 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
00216                 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
00217                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00218                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00219                 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00220                 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
00221                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00222 
00223 #elif _CODE_PAGE == 860 /* Portuguese */
00224 #define _DF1S   0
00225 #define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
00226                 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
00227                 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
00228                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00229                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00230                 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00231                 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
00232                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00233 
00234 #elif _CODE_PAGE == 861 /* Icelandic */
00235 #define _DF1S   0
00236 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
00237                 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
00238                 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
00239                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00240                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00241                 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00242                 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
00243                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00244 
00245 #elif _CODE_PAGE == 862 /* Hebrew */
00246 #define _DF1S   0
00247 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
00248                 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
00249                 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
00250                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00251                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00252                 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00253                 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
00254                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00255 
00256 #elif _CODE_PAGE == 863 /* Canadian-French */
00257 #define _DF1S   0
00258 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
00259                 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
00260                 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
00261                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00262                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00263                 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00264                 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
00265                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00266 
00267 #elif _CODE_PAGE == 864 /* Arabic */
00268 #define _DF1S   0
00269 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
00270                 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
00271                 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
00272                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00273                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00274                 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00275                 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
00276                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00277 
00278 #elif _CODE_PAGE == 865 /* Nordic */
00279 #define _DF1S   0
00280 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
00281                 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
00282                 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
00283                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00284                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00285                 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00286                 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
00287                 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00288 
00289 #elif _CODE_PAGE == 866 /* Russian */
00290 #define _DF1S   0
00291 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
00292                 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
00293                 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
00294                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00295                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00296                 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
00297                 0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
00298                 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
00299 
00300 #elif _CODE_PAGE == 869 /* Greek 2 */
00301 #define _DF1S   0
00302 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
00303                 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \
00304                 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
00305                 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
00306                 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
00307                 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
00308                 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
00309                 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
00310 
00311 #elif _CODE_PAGE == 1   /* ASCII (for only non-LFN cfg) */
00312 #if _USE_LFN
00313 #error Cannot use LFN feature without valid code page.
00314 #endif
00315 #define _DF1S   0
00316 
00317 #else
00318 #error Unknown code page
00319 
00320 #endif
00321 
00322 
00323 /* Character code support macros */
00324 #define IsUpper(c)  (((c)>='A')&&((c)<='Z'))
00325 #define IsLower(c)  (((c)>='a')&&((c)<='z'))
00326 #define IsDigit(c)  (((c)>='0')&&((c)<='9'))
00327 
00328 #if _DF1S       /* Code page is DBCS */
00329 
00330 #ifdef _DF2S    /* Two 1st byte areas */
00331 #define IsDBCS1(c)  (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
00332 #else           /* One 1st byte area */
00333 #define IsDBCS1(c)  ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
00334 #endif
00335 
00336 #ifdef _DS3S    /* Three 2nd byte areas */
00337 #define IsDBCS2(c)  (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
00338 #else           /* Two 2nd byte areas */
00339 #define IsDBCS2(c)  (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
00340 #endif
00341 
00342 #else           /* Code page is SBCS */
00343 
00344 #define IsDBCS1(c)  0
00345 #define IsDBCS2(c)  0
00346 
00347 #endif /* _DF1S */
00348 
00349 
00350 /* Name status flags */
00351 #define NSFLAG      11      /* Index of name status byte in fn[] */
00352 #define NS_LOSS     0x01    /* Out of 8.3 format */
00353 #define NS_LFN      0x02    /* Force to create LFN entry */
00354 #define NS_LAST     0x04    /* Last segment */
00355 #define NS_BODY     0x08    /* Lower case flag (body) */
00356 #define NS_EXT      0x10    /* Lower case flag (ext) */
00357 #define NS_DOT      0x20    /* Dot entry */
00358 
00359 
00360 /* FAT sub-type boundaries (Differ from specs but correct for real DOS/Windows) */
00361 #define MIN_FAT16   4086U   /* Minimum number of clusters of FAT16 */
00362 #define MIN_FAT32   65526U  /* Minimum number of clusters of FAT32 */
00363 
00364 
00365 /* FatFs refers the members in the FAT structures as byte array instead of
00366 / structure members because the structure is not binary compatible between
00367 / different platforms */
00368 
00369 #define BS_jmpBoot          0       /* x86 jump instruction (3) */
00370 #define BS_OEMName          3       /* OEM name (8) */
00371 #define BPB_BytsPerSec      11      /* Sector size [byte] (2) */
00372 #define BPB_SecPerClus      13      /* Cluster size [sector] (1) */
00373 #define BPB_RsvdSecCnt      14      /* Size of reserved area [sector] (2) */
00374 #define BPB_NumFATs         16      /* Number of FAT copies (1) */
00375 #define BPB_RootEntCnt      17      /* Number of root directory entries for FAT12/16 (2) */
00376 #define BPB_TotSec16        19      /* Volume size [sector] (2) */
00377 #define BPB_Media           21      /* Media descriptor (1) */
00378 #define BPB_FATSz16         22      /* FAT size [sector] (2) */
00379 #define BPB_SecPerTrk       24      /* Track size [sector] (2) */
00380 #define BPB_NumHeads        26      /* Number of heads (2) */
00381 #define BPB_HiddSec         28      /* Number of special hidden sectors (4) */
00382 #define BPB_TotSec32        32      /* Volume size [sector] (4) */
00383 #define BS_DrvNum           36      /* Physical drive number (1) */
00384 #define BS_NTres            37      /* Error flag (1) */
00385 #define BS_BootSig          38      /* Extended boot signature (1) */
00386 #define BS_VolID            39      /* Volume serial number (4) */
00387 #define BS_VolLab           43      /* Volume label (8) */
00388 #define BS_FilSysType       54      /* File system type (1) */
00389 #define BPB_FATSz32         36      /* FAT size [sector] (4) */
00390 #define BPB_ExtFlags        40      /* Extended flags (2) */
00391 #define BPB_FSVer           42      /* File system version (2) */
00392 #define BPB_RootClus        44      /* Root directory first cluster (4) */
00393 #define BPB_FSInfo          48      /* Offset of FSINFO sector (2) */
00394 #define BPB_BkBootSec       50      /* Offset of backup boot sector (2) */
00395 #define BS_DrvNum32         64      /* Physical drive number (1) */
00396 #define BS_NTres32          65      /* Error flag (1) */
00397 #define BS_BootSig32        66      /* Extended boot signature (1) */
00398 #define BS_VolID32          67      /* Volume serial number (4) */
00399 #define BS_VolLab32         71      /* Volume label (8) */
00400 #define BS_FilSysType32     82      /* File system type (1) */
00401 #define FSI_LeadSig         0       /* FSI: Leading signature (4) */
00402 #define FSI_StrucSig        484     /* FSI: Structure signature (4) */
00403 #define FSI_Free_Count      488     /* FSI: Number of free clusters (4) */
00404 #define FSI_Nxt_Free        492     /* FSI: Last allocated cluster (4) */
00405 #define MBR_Table           446     /* MBR: Partition table offset (2) */
00406 #define SZ_PTE              16      /* MBR: Size of a partition table entry */
00407 #define BS_55AA             510     /* Signature word (2) */
00408 
00409 #define DIR_Name            0       /* Short file name (11) */
00410 #define DIR_Attr            11      /* Attribute (1) */
00411 #define DIR_NTres           12      /* Lower case flag (1) */
00412 #define DIR_CrtTimeTenth    13      /* Created time sub-second (1) */
00413 #define DIR_CrtTime         14      /* Created time (2) */
00414 #define DIR_CrtDate         16      /* Created date (2) */
00415 #define DIR_LstAccDate      18      /* Last accessed date (2) */
00416 #define DIR_FstClusHI       20      /* Higher 16-bit of first cluster (2) */
00417 #define DIR_WrtTime         22      /* Modified time (2) */
00418 #define DIR_WrtDate         24      /* Modified date (2) */
00419 #define DIR_FstClusLO       26      /* Lower 16-bit of first cluster (2) */
00420 #define DIR_FileSize        28      /* File size (4) */
00421 #define LDIR_Ord            0       /* LFN entry order and LLE flag (1) */
00422 #define LDIR_Attr           11      /* LFN attribute (1) */
00423 #define LDIR_Type           12      /* LFN type (1) */
00424 #define LDIR_Chksum         13      /* Checksum of corresponding SFN entry */
00425 #define LDIR_FstClusLO      26      /* Must be zero (0) */
00426 #define SZ_DIRE             32      /* Size of a directory entry */
00427 #define LLEF                0x40    /* Last long entry flag in LDIR_Ord */
00428 #define DDEM                0xE5    /* Deleted directory entry mark at DIR_Name[0] */
00429 #define RDDEM               0x05    /* Replacement of the character collides with DDEM */
00430 
00431 
00432 
00433 
00434 /*--------------------------------------------------------------------------
00435 
00436    Module Private Work Area
00437 
00438 ---------------------------------------------------------------------------*/
00439 
00440 /* Remark: Uninitialized variables with static duration are guaranteed
00441 /  zero/null at start-up. If not, either the linker or start-up routine
00442 /  being used is not compliance with ANSI-C standard.
00443 */
00444 
00445 #if _VOLUMES < 1 || _VOLUMES > 9
00446 #error Wrong _VOLUMES setting
00447 #endif
00448 static FATFS *FatFs[_VOLUMES];  /* Pointer to the file system objects (logical drives) */
00449 static WORD Fsid;               /* File system mount ID */
00450 
00451 #if _FS_RPATH && _VOLUMES >= 2
00452 static BYTE CurrVol;            /* Current drive */
00453 #endif
00454 
00455 #if _FS_LOCK
00456 static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */
00457 #endif
00458 
00459 #if _USE_LFN == 0           /* Non LFN feature */
00460 #define DEFINE_NAMEBUF      BYTE sfn[12]
00461 #define INIT_BUF(dobj)      (dobj).fn = sfn
00462 #define FREE_BUF()
00463 #else
00464 #if _MAX_LFN < 12 || _MAX_LFN > 255
00465 #error Wrong _MAX_LFN setting
00466 #endif
00467 #if _USE_LFN == 1           /* LFN feature with static working buffer */
00468 static WCHAR LfnBuf[_MAX_LFN + 1];
00469 #define DEFINE_NAMEBUF      BYTE sfn[12]
00470 #define INIT_BUF(dobj)      { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
00471 #define FREE_BUF()
00472 #elif _USE_LFN == 2         /* LFN feature with dynamic working buffer on the stack */
00473 #define DEFINE_NAMEBUF      BYTE sfn[12]; WCHAR lbuf[_MAX_LFN + 1]
00474 #define INIT_BUF(dobj)      { (dobj).fn = sfn; (dobj).lfn = lbuf; }
00475 #define FREE_BUF()
00476 #elif _USE_LFN == 3         /* LFN feature with dynamic working buffer on the heap */
00477 #define DEFINE_NAMEBUF      BYTE sfn[12]; WCHAR *lfn
00478 #define INIT_BUF(dobj)      { lfn = ff_memalloc((_MAX_LFN + 1) * 2); if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); (dobj).lfn = lfn; (dobj).fn = sfn; }
00479 #define FREE_BUF()          ff_memfree(lfn)
00480 #else
00481 #error Wrong _USE_LFN setting
00482 #endif
00483 #endif
00484 
00485 #ifdef _EXCVT
00486 static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for SBCS extended characters */
00487 #endif
00488 
00489 
00490 
00491 
00492 
00493 
00494 /*--------------------------------------------------------------------------
00495 
00496    Module Private Functions
00497 
00498 ---------------------------------------------------------------------------*/
00499 
00500 
00501 /*-----------------------------------------------------------------------*/
00502 /* String functions                                                      */
00503 /*-----------------------------------------------------------------------*/
00504 
00505 /* Copy memory to memory */
00506 static
00507 void mem_cpy (void* dst, const void* src, UINT cnt) {
00508     BYTE *d = (BYTE*)dst;
00509     const BYTE *s = (const BYTE*)src;
00510 
00511 #if _WORD_ACCESS == 1
00512     while (cnt >= sizeof (int)) {
00513         *(int*)d = *(int*)s;
00514         d += sizeof (int); s += sizeof (int);
00515         cnt -= sizeof (int);
00516     }
00517 #endif
00518     while (cnt--)
00519         *d++ = *s++;
00520 }
00521 
00522 /* Fill memory */
00523 static
00524 void mem_set (void* dst, int val, UINT cnt) {
00525     BYTE *d = (BYTE*)dst;
00526 
00527     while (cnt--)
00528         *d++ = (BYTE)val;
00529 }
00530 
00531 /* Compare memory to memory */
00532 static
00533 int mem_cmp (const void* dst, const void* src, UINT cnt) {
00534     const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
00535     int r = 0;
00536 
00537     while (cnt-- && (r = *d++ - *s++) == 0) ;
00538     return r;
00539 }
00540 
00541 /* Check if chr is contained in the string */
00542 static
00543 int chk_chr (const char* str, int chr) {
00544     while (*str && *str != chr) str++;
00545     return *str;
00546 }
00547 
00548 
00549 
00550 
00551 /*-----------------------------------------------------------------------*/
00552 /* Request/Release grant to access the volume                            */
00553 /*-----------------------------------------------------------------------*/
00554 #if _FS_REENTRANT
00555 static
00556 int lock_fs (
00557     FATFS* fs       /* File system object */
00558 )
00559 {
00560     return ff_req_grant(fs->sobj);
00561 }
00562 
00563 
00564 static
00565 void unlock_fs (
00566     FATFS* fs,      /* File system object */
00567     FRESULT res     /* Result code to be returned */
00568 )
00569 {
00570     if (fs &&
00571         res != FR_NOT_ENABLED &&
00572         res != FR_INVALID_DRIVE &&
00573         res != FR_INVALID_OBJECT &&
00574         res != FR_TIMEOUT) {
00575         ff_rel_grant(fs->sobj);
00576     }
00577 }
00578 #endif
00579 
00580 
00581 
00582 
00583 /*-----------------------------------------------------------------------*/
00584 /* File lock control functions                                           */
00585 /*-----------------------------------------------------------------------*/
00586 #if _FS_LOCK
00587 
00588 static
00589 FRESULT chk_lock (  /* Check if the file can be accessed */
00590     FATFS_DIR* dp,      /* Directory object pointing the file to be checked */
00591     int acc         /* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */
00592 )
00593 {
00594     UINT i, be;
00595 
00596     /* Search file semaphore table */
00597     for (i = be = 0; i < _FS_LOCK; i++) {
00598         if (Files[i].fs) {  /* Existing entry */
00599             if (Files[i].fs == dp->fs &&        /* Check if the object matched with an open object */
00600                 Files[i].clu == dp->sclust &&
00601                 Files[i].idx == dp->index) break;
00602         } else {            /* Blank entry */
00603             be = 1;
00604         }
00605     }
00606     if (i == _FS_LOCK)  /* The object is not opened */
00607         return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES;   /* Is there a blank entry for new object? */
00608 
00609     /* The object has been opened. Reject any open against writing file and all write mode open */
00610     return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
00611 }
00612 
00613 
00614 static
00615 int enq_lock (void) /* Check if an entry is available for a new object */
00616 {
00617     UINT i;
00618 
00619     for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
00620     return (i == _FS_LOCK) ? 0 : 1;
00621 }
00622 
00623 
00624 static
00625 UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */
00626     FATFS_DIR* dp,  /* Directory object pointing the file to register or increment */
00627     int acc     /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
00628 )
00629 {
00630     UINT i;
00631 
00632 
00633     for (i = 0; i < _FS_LOCK; i++) {    /* Find the object */
00634         if (Files[i].fs == dp->fs &&
00635             Files[i].clu == dp->sclust &&
00636             Files[i].idx == dp->index) break;
00637     }
00638 
00639     if (i == _FS_LOCK) {                /* Not opened. Register it as new. */
00640         for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
00641         if (i == _FS_LOCK) return 0;    /* No free entry to register (int err) */
00642         Files[i].fs = dp->fs;
00643         Files[i].clu = dp->sclust;
00644         Files[i].idx = dp->index;
00645         Files[i].ctr = 0;
00646     }
00647 
00648     if (acc && Files[i].ctr) return 0;  /* Access violation (int err) */
00649 
00650     Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1;  /* Set semaphore value */
00651 
00652     return i + 1;
00653 }
00654 
00655 
00656 static
00657 FRESULT dec_lock (  /* Decrement object open counter */
00658     UINT i          /* Semaphore index (1..) */
00659 )
00660 {
00661     WORD n;
00662     FRESULT res;
00663 
00664 
00665     if (--i < _FS_LOCK) {   /* Shift index number origin from 0 */
00666         n = Files[i].ctr;
00667         if (n == 0x100) n = 0;      /* If write mode open, delete the entry */
00668         if (n) n--;                 /* Decrement read mode open count */
00669         Files[i].ctr = n;
00670         if (!n) Files[i].fs = 0;    /* Delete the entry if open count gets zero */
00671         res = FR_OK;
00672     } else {
00673         res = FR_INT_ERR;           /* Invalid index nunber */
00674     }
00675     return res;
00676 }
00677 
00678 
00679 static
00680 void clear_lock (   /* Clear lock entries of the volume */
00681     FATFS *fs
00682 )
00683 {
00684     UINT i;
00685 
00686     for (i = 0; i < _FS_LOCK; i++) {
00687         if (Files[i].fs == fs) Files[i].fs = 0;
00688     }
00689 }
00690 #endif
00691 
00692 
00693 
00694 
00695 /*-----------------------------------------------------------------------*/
00696 /* Move/Flush disk access window in the file system object               */
00697 /*-----------------------------------------------------------------------*/
00698 #if !_FS_READONLY
00699 static
00700 FRESULT sync_window (   /* FR_OK:succeeded, !=0:error */
00701     FATFS* fs       /* File system object */
00702 )
00703 {
00704     DWORD wsect;
00705     UINT nf;
00706     FRESULT res = FR_OK;
00707 
00708 
00709     if (fs->wflag) {    /* Write back the sector if it is dirty */
00710         wsect = fs->winsect;    /* Current sector number */
00711         if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) {
00712             res = FR_DISK_ERR;
00713         } else {
00714             fs->wflag = 0;
00715             if (wsect - fs->fatbase < fs->fsize) {      /* Is it in the FAT area? */
00716                 for (nf = fs->n_fats; nf >= 2; nf--) {  /* Reflect the change to all FAT copies */
00717                     wsect += fs->fsize;
00718                     disk_write(fs->drv, fs->win, wsect, 1);
00719                 }
00720             }
00721         }
00722     }
00723     return res;
00724 }
00725 #endif
00726 
00727 
00728 static
00729 FRESULT move_window (   /* FR_OK(0):succeeded, !=0:error */
00730     FATFS* fs,      /* File system object */
00731     DWORD sector    /* Sector number to make appearance in the fs->win[] */
00732 )
00733 {
00734     FRESULT res = FR_OK;
00735 
00736 
00737     if (sector != fs->winsect) {    /* Window offset changed? */
00738 #if !_FS_READONLY
00739         res = sync_window(fs);      /* Write-back changes */
00740 #endif
00741         if (res == FR_OK) {         /* Fill sector window with new data */
00742             if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) {
00743                 sector = 0xFFFFFFFF;    /* Invalidate window if data is not reliable */
00744                 res = FR_DISK_ERR;
00745             }
00746             fs->winsect = sector;
00747         }
00748     }
00749     return res;
00750 }
00751 
00752 
00753 
00754 
00755 /*-----------------------------------------------------------------------*/
00756 /* Synchronize file system and strage device                             */
00757 /*-----------------------------------------------------------------------*/
00758 #if !_FS_READONLY
00759 static
00760 FRESULT sync_fs (   /* FR_OK:succeeded, !=0:error */
00761     FATFS* fs       /* File system object */
00762 )
00763 {
00764     FRESULT res;
00765 
00766 
00767     res = sync_window(fs);
00768     if (res == FR_OK) {
00769         /* Update FSInfo sector if needed */
00770         if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) {
00771             /* Create FSInfo structure */
00772             mem_set(fs->win, 0, SS(fs));
00773             ST_WORD(fs->win + BS_55AA, 0xAA55);
00774             ST_DWORD(fs->win + FSI_LeadSig, 0x41615252);
00775             ST_DWORD(fs->win + FSI_StrucSig, 0x61417272);
00776             ST_DWORD(fs->win + FSI_Free_Count, fs->free_clust);
00777             ST_DWORD(fs->win + FSI_Nxt_Free, fs->last_clust);
00778             /* Write it into the FSInfo sector */
00779             fs->winsect = fs->volbase + 1;
00780             disk_write(fs->drv, fs->win, fs->winsect, 1);
00781             fs->fsi_flag = 0;
00782         }
00783         /* Make sure that no pending write process in the physical drive */
00784         if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
00785             res = FR_DISK_ERR;
00786     }
00787 
00788     return res;
00789 }
00790 #endif
00791 
00792 
00793 
00794 
00795 /*-----------------------------------------------------------------------*/
00796 /* Get sector# from cluster#                                             */
00797 /*-----------------------------------------------------------------------*/
00798 /* Hidden API for hacks and disk tools */
00799 
00800 DWORD clust2sect (  /* !=0:Sector number, 0:Failed (invalid cluster#) */
00801     FATFS* fs,      /* File system object */
00802     DWORD clst      /* Cluster# to be converted */
00803 )
00804 {
00805     clst -= 2;
00806     if (clst >= fs->n_fatent - 2) return 0;     /* Invalid cluster# */
00807     return clst * fs->csize + fs->database;
00808 }
00809 
00810 
00811 
00812 
00813 /*-----------------------------------------------------------------------*/
00814 /* FAT access - Read value of a FAT entry                                */
00815 /*-----------------------------------------------------------------------*/
00816 /* Hidden API for hacks and disk tools */
00817 
00818 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x0FFFFFFF:Cluster status */
00819     FATFS* fs,  /* File system object */
00820     DWORD clst  /* FAT index number (cluster number) to get the value */
00821 )
00822 {
00823     UINT wc, bc;
00824     BYTE *p;
00825     DWORD val;
00826 
00827 
00828     if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
00829         val = 1;    /* Internal error */
00830 
00831     } else {
00832         val = 0xFFFFFFFF;   /* Default value falls on disk error */
00833 
00834         switch (fs->fs_type) {
00835         case FS_FAT12 :
00836             bc = (UINT)clst; bc += bc / 2;
00837             if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
00838             wc = fs->win[bc++ % SS(fs)];
00839             if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
00840             wc |= fs->win[bc % SS(fs)] << 8;
00841             val = clst & 1 ? wc >> 4 : (wc & 0xFFF);
00842             break;
00843 
00844         case FS_FAT16 :
00845             if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
00846             p = &fs->win[clst * 2 % SS(fs)];
00847             val = LD_WORD(p);
00848             break;
00849 
00850         case FS_FAT32 :
00851             if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
00852             p = &fs->win[clst * 4 % SS(fs)];
00853             val = LD_DWORD(p) & 0x0FFFFFFF;
00854             break;
00855 
00856         default:
00857             val = 1;    /* Internal error */
00858         }
00859     }
00860 
00861     return val;
00862 }
00863 
00864 
00865 
00866 
00867 /*-----------------------------------------------------------------------*/
00868 /* FAT access - Change value of a FAT entry                              */
00869 /*-----------------------------------------------------------------------*/
00870 /* Hidden API for hacks and disk tools */
00871 
00872 #if !_FS_READONLY
00873 FRESULT put_fat (   /* FR_OK(0):succeeded, !=0:error */
00874     FATFS* fs,      /* File system object */
00875     DWORD clst,     /* FAT index number (cluster number) to be changed */
00876     DWORD val       /* New value to be set to the entry */
00877 )
00878 {
00879     UINT bc;
00880     BYTE *p;
00881     FRESULT res;
00882 
00883 
00884     if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
00885         res = FR_INT_ERR;
00886 
00887     } else {
00888         switch (fs->fs_type) {
00889         case FS_FAT12 :
00890             bc = (UINT)clst; bc += bc / 2;
00891             res = move_window(fs, fs->fatbase + (bc / SS(fs)));
00892             if (res != FR_OK) break;
00893             p = &fs->win[bc++ % SS(fs)];
00894             *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
00895             fs->wflag = 1;
00896             res = move_window(fs, fs->fatbase + (bc / SS(fs)));
00897             if (res != FR_OK) break;
00898             p = &fs->win[bc % SS(fs)];
00899             *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
00900             fs->wflag = 1;
00901             break;
00902 
00903         case FS_FAT16 :
00904             res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
00905             if (res != FR_OK) break;
00906             p = &fs->win[clst * 2 % SS(fs)];
00907             ST_WORD(p, (WORD)val);
00908             fs->wflag = 1;
00909             break;
00910 
00911         case FS_FAT32 :
00912             res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
00913             if (res != FR_OK) break;
00914             p = &fs->win[clst * 4 % SS(fs)];
00915             val |= LD_DWORD(p) & 0xF0000000;
00916             ST_DWORD(p, val);
00917             fs->wflag = 1;
00918             break;
00919 
00920         default :
00921             res = FR_INT_ERR;
00922         }
00923     }
00924 
00925     return res;
00926 }
00927 #endif /* !_FS_READONLY */
00928 
00929 
00930 
00931 
00932 /*-----------------------------------------------------------------------*/
00933 /* FAT handling - Remove a cluster chain                                 */
00934 /*-----------------------------------------------------------------------*/
00935 #if !_FS_READONLY
00936 static
00937 FRESULT remove_chain (  /* FR_OK(0):succeeded, !=0:error */
00938     FATFS* fs,          /* File system object */
00939     DWORD clst          /* Cluster# to remove a chain from */
00940 )
00941 {
00942     FRESULT res;
00943     DWORD nxt;
00944 #if _USE_TRIM
00945     DWORD scl = clst, ecl = clst, rt[2];
00946 #endif
00947 
00948     if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
00949         res = FR_INT_ERR;
00950 
00951     } else {
00952         res = FR_OK;
00953         while (clst < fs->n_fatent) {           /* Not a last link? */
00954             nxt = get_fat(fs, clst);            /* Get cluster status */
00955             if (nxt == 0) break;                /* Empty cluster? */
00956             if (nxt == 1) { res = FR_INT_ERR; break; }  /* Internal error? */
00957             if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }    /* Disk error? */
00958             res = put_fat(fs, clst, 0);         /* Mark the cluster "empty" */
00959             if (res != FR_OK) break;
00960             if (fs->free_clust != 0xFFFFFFFF) { /* Update FSINFO */
00961                 fs->free_clust++;
00962                 fs->fsi_flag |= 1;
00963             }
00964 #if _USE_TRIM
00965             if (ecl + 1 == nxt) {   /* Is next cluster contiguous? */
00966                 ecl = nxt;
00967             } else {                /* End of contiguous clusters */ 
00968                 rt[0] = clust2sect(fs, scl);                    /* Start sector */
00969                 rt[1] = clust2sect(fs, ecl) + fs->csize - 1;    /* End sector */
00970                 disk_ioctl(fs->drv, CTRL_TRIM, rt);             /* Erase the block */
00971                 scl = ecl = nxt;
00972             }
00973 #endif
00974             clst = nxt; /* Next cluster */
00975         }
00976     }
00977 
00978     return res;
00979 }
00980 #endif
00981 
00982 
00983 
00984 
00985 /*-----------------------------------------------------------------------*/
00986 /* FAT handling - Stretch or Create a cluster chain                      */
00987 /*-----------------------------------------------------------------------*/
00988 #if !_FS_READONLY
00989 static
00990 DWORD create_chain (    /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
00991     FATFS* fs,          /* File system object */
00992     DWORD clst          /* Cluster# to stretch, 0:Create a new chain */
00993 )
00994 {
00995     DWORD cs, ncl, scl;
00996     FRESULT res;
00997 
00998 
00999     if (clst == 0) {        /* Create a new chain */
01000         scl = fs->last_clust;           /* Get suggested start point */
01001         if (!scl || scl >= fs->n_fatent) scl = 1;
01002     }
01003     else {                  /* Stretch the current chain */
01004         cs = get_fat(fs, clst);         /* Check the cluster status */
01005         if (cs < 2) return 1;           /* Invalid value */
01006         if (cs == 0xFFFFFFFF) return cs;    /* A disk error occurred */
01007         if (cs < fs->n_fatent) return cs;   /* It is already followed by next cluster */
01008         scl = clst;
01009     }
01010 
01011     ncl = scl;              /* Start cluster */
01012     for (;;) {
01013         ncl++;                          /* Next cluster */
01014         if (ncl >= fs->n_fatent) {      /* Check wrap around */
01015             ncl = 2;
01016             if (ncl > scl) return 0;    /* No free cluster */
01017         }
01018         cs = get_fat(fs, ncl);          /* Get the cluster status */
01019         if (cs == 0) break;             /* Found a free cluster */
01020         if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */
01021             return cs;
01022         if (ncl == scl) return 0;       /* No free cluster */
01023     }
01024 
01025     res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */
01026     if (res == FR_OK && clst != 0) {
01027         res = put_fat(fs, clst, ncl);   /* Link it to the previous one if needed */
01028     }
01029     if (res == FR_OK) {
01030         fs->last_clust = ncl;           /* Update FSINFO */
01031         if (fs->free_clust != 0xFFFFFFFF) {
01032             fs->free_clust--;
01033             fs->fsi_flag |= 1;
01034         }
01035     } else {
01036         ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
01037     }
01038 
01039     return ncl;     /* Return new cluster number or error code */
01040 }
01041 #endif /* !_FS_READONLY */
01042 
01043 
01044 
01045 
01046 /*-----------------------------------------------------------------------*/
01047 /* FAT handling - Convert offset into cluster with link map table        */
01048 /*-----------------------------------------------------------------------*/
01049 
01050 #if _USE_FASTSEEK
01051 static
01052 DWORD clmt_clust (  /* <2:Error, >=2:Cluster number */
01053     FIL* fp,        /* Pointer to the file object */
01054     DWORD ofs       /* File offset to be converted to cluster# */
01055 )
01056 {
01057     DWORD cl, ncl, *tbl;
01058 
01059 
01060     tbl = fp->cltbl + 1;    /* Top of CLMT */
01061     cl = ofs / SS(fp->fs) / fp->fs->csize;  /* Cluster order from top of the file */
01062     for (;;) {
01063         ncl = *tbl++;           /* Number of cluters in the fragment */
01064         if (!ncl) return 0;     /* End of table? (error) */
01065         if (cl < ncl) break;    /* In this fragment? */
01066         cl -= ncl; tbl++;       /* Next fragment */
01067     }
01068     return cl + *tbl;   /* Return the cluster number */
01069 }
01070 #endif  /* _USE_FASTSEEK */
01071 
01072 
01073 
01074 
01075 /*-----------------------------------------------------------------------*/
01076 /* Directory handling - Set directory index                              */
01077 /*-----------------------------------------------------------------------*/
01078 
01079 static
01080 FRESULT dir_sdi (   /* FR_OK(0):succeeded, !=0:error */
01081     FATFS_DIR* dp,      /* Pointer to directory object */
01082     UINT idx        /* Index of directory table */
01083 )
01084 {
01085     DWORD clst, sect;
01086     UINT ic;
01087 
01088 
01089     dp->index = (WORD)idx;  /* Current index */
01090     clst = dp->sclust;      /* Table start cluster (0:root) */
01091     if (clst == 1 || clst >= dp->fs->n_fatent)  /* Check start cluster range */
01092         return FR_INT_ERR;
01093     if (!clst && dp->fs->fs_type == FS_FAT32)   /* Replace cluster# 0 with root cluster# if in FAT32 */
01094         clst = dp->fs->dirbase;
01095 
01096     if (clst == 0) {    /* Static table (root-directory in FAT12/16) */
01097         if (idx >= dp->fs->n_rootdir)   /* Is index out of range? */
01098             return FR_INT_ERR;
01099         sect = dp->fs->dirbase;
01100     }
01101     else {              /* Dynamic table (root-directory in FAT32 or sub-directory) */
01102         ic = SS(dp->fs) / SZ_DIRE * dp->fs->csize;  /* Entries per cluster */
01103         while (idx >= ic) { /* Follow cluster chain */
01104             clst = get_fat(dp->fs, clst);               /* Get next cluster */
01105             if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
01106             if (clst < 2 || clst >= dp->fs->n_fatent)   /* Reached to end of table or internal error */
01107                 return FR_INT_ERR;
01108             idx -= ic;
01109         }
01110         sect = clust2sect(dp->fs, clst);
01111     }
01112     dp->clust = clst;   /* Current cluster# */
01113     if (!sect) return FR_INT_ERR;
01114     dp->sect = sect + idx / (SS(dp->fs) / SZ_DIRE);                 /* Sector# of the directory entry */
01115     dp->dir = dp->fs->win + (idx % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE;   /* Ptr to the entry in the sector */
01116 
01117     return FR_OK;
01118 }
01119 
01120 
01121 
01122 
01123 /*-----------------------------------------------------------------------*/
01124 /* Directory handling - Move directory table index next                  */
01125 /*-----------------------------------------------------------------------*/
01126 
01127 static
01128 FRESULT dir_next (  /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
01129     FATFS_DIR* dp,      /* Pointer to the directory object */
01130     int stretch     /* 0: Do not stretch table, 1: Stretch table if needed */
01131 )
01132 {
01133     DWORD clst;
01134     UINT i;
01135 #if !_FS_READONLY
01136     UINT c;
01137 #endif
01138 
01139 
01140     i = dp->index + 1;
01141     if (!(i & 0xFFFF) || !dp->sect) /* Report EOT when index has reached 65535 */
01142         return FR_NO_FILE;
01143 
01144     if (!(i % (SS(dp->fs) / SZ_DIRE))) {    /* Sector changed? */
01145         dp->sect++;                 /* Next sector */
01146 
01147         if (!dp->clust) {       /* Static table */
01148             if (i >= dp->fs->n_rootdir) /* Report EOT if it reached end of static table */
01149                 return FR_NO_FILE;
01150         }
01151         else {                  /* Dynamic table */
01152             if (((i / (SS(dp->fs) / SZ_DIRE)) & (dp->fs->csize - 1)) == 0) {    /* Cluster changed? */
01153                 clst = get_fat(dp->fs, dp->clust);              /* Get next cluster */
01154                 if (clst <= 1) return FR_INT_ERR;
01155                 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
01156                 if (clst >= dp->fs->n_fatent) {                 /* If it reached end of dynamic table, */
01157 #if !_FS_READONLY
01158                     if (!stretch) return FR_NO_FILE;            /* If do not stretch, report EOT */
01159                     clst = create_chain(dp->fs, dp->clust);     /* Stretch cluster chain */
01160                     if (clst == 0) return FR_DENIED;            /* No free cluster */
01161                     if (clst == 1) return FR_INT_ERR;
01162                     if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
01163                     /* Clean-up stretched table */
01164                     if (sync_window(dp->fs)) return FR_DISK_ERR;/* Flush disk access window */
01165                     mem_set(dp->fs->win, 0, SS(dp->fs));        /* Clear window buffer */
01166                     dp->fs->winsect = clust2sect(dp->fs, clst); /* Cluster start sector */
01167                     for (c = 0; c < dp->fs->csize; c++) {       /* Fill the new cluster with 0 */
01168                         dp->fs->wflag = 1;
01169                         if (sync_window(dp->fs)) return FR_DISK_ERR;
01170                         dp->fs->winsect++;
01171                     }
01172                     dp->fs->winsect -= c;                       /* Rewind window offset */
01173 #else
01174                     if (!stretch) return FR_NO_FILE;            /* If do not stretch, report EOT (this is to suppress warning) */
01175                     return FR_NO_FILE;                          /* Report EOT */
01176 #endif
01177                 }
01178                 dp->clust = clst;               /* Initialize data for new cluster */
01179                 dp->sect = clust2sect(dp->fs, clst);
01180             }
01181         }
01182     }
01183 
01184     dp->index = (WORD)i;    /* Current index */
01185     dp->dir = dp->fs->win + (i % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Current entry in the window */
01186 
01187     return FR_OK;
01188 }
01189 
01190 
01191 
01192 
01193 /*-----------------------------------------------------------------------*/
01194 /* Directory handling - Reserve directory entry                          */
01195 /*-----------------------------------------------------------------------*/
01196 
01197 #if !_FS_READONLY
01198 static
01199 FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */
01200     FATFS_DIR* dp,      /* Pointer to the directory object */
01201     UINT nent       /* Number of contiguous entries to allocate (1-21) */
01202 )
01203 {
01204     FRESULT res;
01205     UINT n;
01206 
01207 
01208     res = dir_sdi(dp, 0);
01209     if (res == FR_OK) {
01210         n = 0;
01211         do {
01212             res = move_window(dp->fs, dp->sect);
01213             if (res != FR_OK) break;
01214             if (dp->dir[0] == DDEM || dp->dir[0] == 0) {    /* Is it a free entry? */
01215                 if (++n == nent) break; /* A block of contiguous free entries is found */
01216             } else {
01217                 n = 0;                  /* Not a blank entry. Restart to search */
01218             }
01219             res = dir_next(dp, 1);      /* Next entry with table stretch enabled */
01220         } while (res == FR_OK);
01221     }
01222     if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
01223     return res;
01224 }
01225 #endif
01226 
01227 
01228 
01229 
01230 /*-----------------------------------------------------------------------*/
01231 /* Directory handling - Load/Store start cluster number                  */
01232 /*-----------------------------------------------------------------------*/
01233 
01234 static
01235 DWORD ld_clust (    /* Returns the top cluster value of the SFN entry */
01236     FATFS* fs,      /* Pointer to the fs object */
01237     const BYTE* dir /* Pointer to the SFN entry */
01238 )
01239 {
01240     DWORD cl;
01241 
01242     cl = LD_WORD(dir + DIR_FstClusLO);
01243     if (fs->fs_type == FS_FAT32)
01244         cl |= (DWORD)LD_WORD(dir + DIR_FstClusHI) << 16;
01245 
01246     return cl;
01247 }
01248 
01249 
01250 #if !_FS_READONLY
01251 static
01252 void st_clust (
01253     BYTE* dir,  /* Pointer to the SFN entry */
01254     DWORD cl    /* Value to be set */
01255 )
01256 {
01257     ST_WORD(dir + DIR_FstClusLO, cl);
01258     ST_WORD(dir + DIR_FstClusHI, cl >> 16);
01259 }
01260 #endif
01261 
01262 
01263 
01264 
01265 /*-----------------------------------------------------------------------*/
01266 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry   */
01267 /*-----------------------------------------------------------------------*/
01268 #if _USE_LFN
01269 static
01270 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30};  /* Offset of LFN characters in the directory entry */
01271 
01272 
01273 static
01274 int cmp_lfn (           /* 1:matched, 0:not matched */
01275     WCHAR* lfnbuf,      /* Pointer to the LFN working buffer to be compared */
01276     BYTE* dir           /* Pointer to the directory entry containing the part of LFN */
01277 )
01278 {
01279     UINT i, s;
01280     WCHAR wc, uc;
01281 
01282 
01283     if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0;   /* Check LDIR_FstClusLO */
01284 
01285     i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13;  /* Offset in the LFN buffer */
01286 
01287     for (wc = 1, s = 0; s < 13; s++) {      /* Process all characters in the entry */
01288         uc = LD_WORD(dir + LfnOfs[s]);      /* Pick an LFN character */
01289         if (wc) {
01290             if (i >= _MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++]))   /* Compare it */
01291                 return 0;                   /* Not matched */
01292             wc = uc;
01293         } else {
01294             if (uc != 0xFFFF) return 0;     /* Check filler */
01295         }
01296     }
01297 
01298     if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i])  /* Last segment matched but different length */
01299         return 0;
01300 
01301     return 1;       /* The part of LFN matched */
01302 }
01303 
01304 
01305 
01306 static
01307 int pick_lfn (          /* 1:succeeded, 0:buffer overflow or invalid LFN entry */
01308     WCHAR* lfnbuf,      /* Pointer to the LFN working buffer */
01309     BYTE* dir           /* Pointer to the LFN entry */
01310 )
01311 {
01312     UINT i, s;
01313     WCHAR wc, uc;
01314 
01315 
01316     if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0;   /* Check LDIR_FstClusLO */
01317 
01318     i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13;  /* Offset in the LFN buffer */
01319 
01320     for (wc = 1, s = 0; s < 13; s++) {      /* Process all characters in the entry */
01321         uc = LD_WORD(dir + LfnOfs[s]);      /* Pick an LFN character */
01322         if (wc) {
01323             if (i >= _MAX_LFN) return 0;    /* Buffer overflow? */
01324             lfnbuf[i++] = wc = uc;          /* Store it */
01325         } else {
01326             if (uc != 0xFFFF) return 0;     /* Check filler */
01327         }
01328     }
01329 
01330     if (dir[LDIR_Ord] & LLEF) {             /* Put terminator if it is the last LFN part */
01331         if (i >= _MAX_LFN) return 0;        /* Buffer overflow? */
01332         lfnbuf[i] = 0;
01333     }
01334 
01335     return 1;       /* The part of LFN is valid */
01336 }
01337 
01338 
01339 #if !_FS_READONLY
01340 static
01341 void fit_lfn (
01342     const WCHAR* lfnbuf,    /* Pointer to the LFN working buffer */
01343     BYTE* dir,              /* Pointer to the LFN entry to be processed */
01344     BYTE ord,               /* LFN order (1-20) */
01345     BYTE sum                /* Checksum of the corresponding SFN */
01346 )
01347 {
01348     UINT i, s;
01349     WCHAR wc;
01350 
01351 
01352     dir[LDIR_Chksum] = sum;         /* Set checksum */
01353     dir[LDIR_Attr] = AM_LFN;        /* Set attribute. LFN entry */
01354     dir[LDIR_Type] = 0;
01355     ST_WORD(dir + LDIR_FstClusLO, 0);
01356 
01357     i = (ord - 1) * 13;             /* Get offset in the LFN working buffer */
01358     s = wc = 0;
01359     do {
01360         if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective character */
01361         ST_WORD(dir+LfnOfs[s], wc); /* Put it */
01362         if (!wc) wc = 0xFFFF;       /* Padding characters following last character */
01363     } while (++s < 13);
01364     if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLEF;    /* Bottom LFN part is the start of LFN sequence */
01365     dir[LDIR_Ord] = ord;            /* Set the LFN order */
01366 }
01367 
01368 #endif
01369 #endif
01370 
01371 
01372 
01373 
01374 /*-----------------------------------------------------------------------*/
01375 /* Create numbered name                                                  */
01376 /*-----------------------------------------------------------------------*/
01377 #if _USE_LFN
01378 static
01379 void gen_numname (
01380     BYTE* dst,          /* Pointer to the buffer to store numbered SFN */
01381     const BYTE* src,    /* Pointer to SFN */
01382     const WCHAR* lfn,   /* Pointer to LFN */
01383     UINT seq            /* Sequence number */
01384 )
01385 {
01386     BYTE ns[8], c;
01387     UINT i, j;
01388     WCHAR wc;
01389     DWORD sr;
01390 
01391 
01392     mem_cpy(dst, src, 11);
01393 
01394     if (seq > 5) {  /* On many collisions, generate a hash number instead of sequential number */
01395         sr = seq;
01396         while (*lfn) {  /* Create a CRC */
01397             wc = *lfn++;
01398             for (i = 0; i < 16; i++) {
01399                 sr = (sr << 1) + (wc & 1);
01400                 wc >>= 1;
01401                 if (sr & 0x10000) sr ^= 0x11021;
01402             }
01403         }
01404         seq = (UINT)sr;
01405     }
01406 
01407     /* itoa (hexdecimal) */
01408     i = 7;
01409     do {
01410         c = (seq % 16) + '0';
01411         if (c > '9') c += 7;
01412         ns[i--] = c;
01413         seq /= 16;
01414     } while (seq);
01415     ns[i] = '~';
01416 
01417     /* Append the number */
01418     for (j = 0; j < i && dst[j] != ' '; j++) {
01419         if (IsDBCS1(dst[j])) {
01420             if (j == i - 1) break;
01421             j++;
01422         }
01423     }
01424     do {
01425         dst[j++] = (i < 8) ? ns[i++] : ' ';
01426     } while (j < 8);
01427 }
01428 #endif
01429 
01430 
01431 
01432 
01433 /*-----------------------------------------------------------------------*/
01434 /* Calculate checksum of an SFN entry                                    */
01435 /*-----------------------------------------------------------------------*/
01436 #if _USE_LFN
01437 static
01438 BYTE sum_sfn (
01439     const BYTE* dir     /* Pointer to the SFN entry */
01440 )
01441 {
01442     BYTE sum = 0;
01443     UINT n = 11;
01444 
01445     do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
01446     return sum;
01447 }
01448 #endif
01449 
01450 
01451 
01452 
01453 /*-----------------------------------------------------------------------*/
01454 /* Directory handling - Find an object in the directory                  */
01455 /*-----------------------------------------------------------------------*/
01456 
01457 static
01458 FRESULT dir_find (  /* FR_OK(0):succeeded, !=0:error */
01459     FATFS_DIR* dp           /* Pointer to the directory object linked to the file name */
01460 )
01461 {
01462     FRESULT res;
01463     BYTE c, *dir;
01464 #if _USE_LFN
01465     BYTE a, ord, sum;
01466 #endif
01467 
01468     res = dir_sdi(dp, 0);           /* Rewind directory object */
01469     if (res != FR_OK) return res;
01470 
01471 #if _USE_LFN
01472     ord = sum = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
01473 #endif
01474     do {
01475         res = move_window(dp->fs, dp->sect);
01476         if (res != FR_OK) break;
01477         dir = dp->dir;                  /* Ptr to the directory entry of current index */
01478         c = dir[DIR_Name];
01479         if (c == 0) { res = FR_NO_FILE; break; }    /* Reached to end of table */
01480 #if _USE_LFN    /* LFN configuration */
01481         a = dir[DIR_Attr] & AM_MASK;
01482         if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) {   /* An entry without valid data */
01483             ord = 0xFF; dp->lfn_idx = 0xFFFF;   /* Reset LFN sequence */
01484         } else {
01485             if (a == AM_LFN) {          /* An LFN entry is found */
01486                 if (dp->lfn) {
01487                     if (c & LLEF) {     /* Is it start of LFN sequence? */
01488                         sum = dir[LDIR_Chksum];
01489                         c &= ~LLEF; ord = c;    /* LFN start order */
01490                         dp->lfn_idx = dp->index;    /* Start index of LFN */
01491                     }
01492                     /* Check validity of the LFN entry and compare it with given name */
01493                     ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
01494                 }
01495             } else {                    /* An SFN entry is found */
01496                 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
01497                 if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dir, dp->fn, 11)) break;    /* SFN matched? */
01498                 ord = 0xFF; dp->lfn_idx = 0xFFFF;   /* Reset LFN sequence */
01499             }
01500         }
01501 #else       /* Non LFN configuration */
01502         if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dp->fn, 11)) /* Is it a valid entry? */
01503             break;
01504 #endif
01505         res = dir_next(dp, 0);      /* Next entry */
01506     } while (res == FR_OK);
01507 
01508     return res;
01509 }
01510 
01511 
01512 
01513 
01514 /*-----------------------------------------------------------------------*/
01515 /* Read an object from the directory                                     */
01516 /*-----------------------------------------------------------------------*/
01517 #if _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2
01518 static
01519 FRESULT dir_read (
01520     FATFS_DIR* dp,      /* Pointer to the directory object */
01521     int vol         /* Filtered by 0:file/directory or 1:volume label */
01522 )
01523 {
01524     FRESULT res;
01525     BYTE a, c, *dir;
01526 #if _USE_LFN
01527     BYTE ord = 0xFF, sum = 0xFF;
01528 #endif
01529 
01530     res = FR_NO_FILE;
01531     while (dp->sect) {
01532         res = move_window(dp->fs, dp->sect);
01533         if (res != FR_OK) break;
01534         dir = dp->dir;                  /* Ptr to the directory entry of current index */
01535         c = dir[DIR_Name];
01536         if (c == 0) { res = FR_NO_FILE; break; }    /* Reached to end of table */
01537         a = dir[DIR_Attr] & AM_MASK;
01538 #if _USE_LFN    /* LFN configuration */
01539         if (c == DDEM || (!_FS_RPATH && c == '.') || (int)((a & ~AM_ARC) == AM_VOL) != vol) {   /* An entry without valid data */
01540             ord = 0xFF;
01541         } else {
01542             if (a == AM_LFN) {          /* An LFN entry is found */
01543                 if (c & LLEF) {         /* Is it start of LFN sequence? */
01544                     sum = dir[LDIR_Chksum];
01545                     c &= ~LLEF; ord = c;
01546                     dp->lfn_idx = dp->index;
01547                 }
01548                 /* Check LFN validity and capture it */
01549                 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
01550             } else {                    /* An SFN entry is found */
01551                 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
01552                     dp->lfn_idx = 0xFFFF;       /* It has no LFN. */
01553                 break;
01554             }
01555         }
01556 #else       /* Non LFN configuration */
01557         if (c != DDEM && (_FS_RPATH || c != '.') && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol)   /* Is it a valid entry? */
01558             break;
01559 #endif
01560         res = dir_next(dp, 0);              /* Next entry */
01561         if (res != FR_OK) break;
01562     }
01563 
01564     if (res != FR_OK) dp->sect = 0;
01565 
01566     return res;
01567 }
01568 #endif  /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */
01569 
01570 
01571 
01572 
01573 /*-----------------------------------------------------------------------*/
01574 /* Register an object to the directory                                   */
01575 /*-----------------------------------------------------------------------*/
01576 #if !_FS_READONLY
01577 static
01578 FRESULT dir_register (  /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */
01579     FATFS_DIR* dp               /* Target directory with object name to be created */
01580 )
01581 {
01582     FRESULT res;
01583 #if _USE_LFN    /* LFN configuration */
01584     UINT n, nent;
01585     BYTE sn[12], *fn, sum;
01586     WCHAR *lfn;
01587 
01588 
01589     fn = dp->fn; lfn = dp->lfn;
01590     mem_cpy(sn, fn, 12);
01591 
01592     if (_FS_RPATH && (sn[NSFLAG] & NS_DOT))     /* Cannot create dot entry */
01593         return FR_INVALID_NAME;
01594 
01595     if (sn[NSFLAG] & NS_LOSS) {         /* When LFN is out of 8.3 format, generate a numbered name */
01596         fn[NSFLAG] = 0; dp->lfn = 0;            /* Find only SFN */
01597         for (n = 1; n < 100; n++) {
01598             gen_numname(fn, sn, lfn, n);    /* Generate a numbered name */
01599             res = dir_find(dp);             /* Check if the name collides with existing SFN */
01600             if (res != FR_OK) break;
01601         }
01602         if (n == 100) return FR_DENIED;     /* Abort if too many collisions */
01603         if (res != FR_NO_FILE) return res;  /* Abort if the result is other than 'not collided' */
01604         fn[NSFLAG] = sn[NSFLAG]; dp->lfn = lfn;
01605     }
01606 
01607     if (sn[NSFLAG] & NS_LFN) {          /* When LFN is to be created, allocate entries for an SFN + LFNs. */
01608         for (n = 0; lfn[n]; n++) ;
01609         nent = (n + 25) / 13;
01610     } else {                        /* Otherwise allocate an entry for an SFN  */
01611         nent = 1;
01612     }
01613     res = dir_alloc(dp, nent);      /* Allocate entries */
01614 
01615     if (res == FR_OK && --nent) {   /* Set LFN entry if needed */
01616         res = dir_sdi(dp, dp->index - nent);
01617         if (res == FR_OK) {
01618             sum = sum_sfn(dp->fn);  /* Checksum value of the SFN tied to the LFN */
01619             do {                    /* Store LFN entries in bottom first */
01620                 res = move_window(dp->fs, dp->sect);
01621                 if (res != FR_OK) break;
01622                 fit_lfn(dp->lfn, dp->dir, (BYTE)nent, sum);
01623                 dp->fs->wflag = 1;
01624                 res = dir_next(dp, 0);  /* Next entry */
01625             } while (res == FR_OK && --nent);
01626         }
01627     }
01628 #else   /* Non LFN configuration */
01629     res = dir_alloc(dp, 1);     /* Allocate an entry for SFN */
01630 #endif
01631 
01632     if (res == FR_OK) {             /* Set SFN entry */
01633         res = move_window(dp->fs, dp->sect);
01634         if (res == FR_OK) {
01635             mem_set(dp->dir, 0, SZ_DIRE);   /* Clean the entry */
01636             mem_cpy(dp->dir, dp->fn, 11);   /* Put SFN */
01637 #if _USE_LFN
01638             dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT);   /* Put NT flag */
01639 #endif
01640             dp->fs->wflag = 1;
01641         }
01642     }
01643 
01644     return res;
01645 }
01646 #endif /* !_FS_READONLY */
01647 
01648 
01649 
01650 
01651 /*-----------------------------------------------------------------------*/
01652 /* Remove an object from the directory                                   */
01653 /*-----------------------------------------------------------------------*/
01654 #if !_FS_READONLY && !_FS_MINIMIZE
01655 static
01656 FRESULT dir_remove (    /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */
01657     FATFS_DIR* dp               /* Directory object pointing the entry to be removed */
01658 )
01659 {
01660     FRESULT res;
01661 #if _USE_LFN    /* LFN configuration */
01662     UINT i;
01663 
01664     i = dp->index;  /* SFN index */
01665     res = dir_sdi(dp, (dp->lfn_idx == 0xFFFF) ? i : dp->lfn_idx);   /* Goto the SFN or top of the LFN entries */
01666     if (res == FR_OK) {
01667         do {
01668             res = move_window(dp->fs, dp->sect);
01669             if (res != FR_OK) break;
01670             mem_set(dp->dir, 0, SZ_DIRE);   /* Clear and mark the entry "deleted" */
01671             *dp->dir = DDEM;
01672             dp->fs->wflag = 1;
01673             if (dp->index >= i) break;  /* When reached SFN, all entries of the object has been deleted. */
01674             res = dir_next(dp, 0);      /* Next entry */
01675         } while (res == FR_OK);
01676         if (res == FR_NO_FILE) res = FR_INT_ERR;
01677     }
01678 
01679 #else           /* Non LFN configuration */
01680     res = dir_sdi(dp, dp->index);
01681     if (res == FR_OK) {
01682         res = move_window(dp->fs, dp->sect);
01683         if (res == FR_OK) {
01684             mem_set(dp->dir, 0, SZ_DIRE);   /* Clear and mark the entry "deleted" */
01685             *dp->dir = DDEM;
01686             dp->fs->wflag = 1;
01687         }
01688     }
01689 #endif
01690 
01691     return res;
01692 }
01693 #endif /* !_FS_READONLY */
01694 
01695 
01696 
01697 
01698 /*-----------------------------------------------------------------------*/
01699 /* Get file information from directory entry                             */
01700 /*-----------------------------------------------------------------------*/
01701 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2
01702 static
01703 void get_fileinfo (     /* No return code */
01704     FATFS_DIR* dp,          /* Pointer to the directory object */
01705     FILINFO* fno        /* Pointer to the file information to be filled */
01706 )
01707 {
01708     UINT i;
01709     TCHAR *p, c;
01710     BYTE *dir;
01711 #if _USE_LFN
01712     WCHAR w, *lfn;
01713 #endif
01714 
01715     p = fno->fname;
01716     if (dp->sect) {     /* Get SFN */
01717         dir = dp->dir;
01718         i = 0;
01719         while (i < 11) {        /* Copy name body and extension */
01720             c = (TCHAR)dir[i++];
01721             if (c == ' ') continue;             /* Skip padding spaces */
01722             if (c == RDDEM) c = (TCHAR)DDEM;    /* Restore replaced DDEM character */
01723             if (i == 9) *p++ = '.';             /* Insert a . if extension is exist */
01724 #if _USE_LFN
01725             if (IsUpper(c) && (dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY)))
01726                 c += 0x20;          /* To lower */
01727 #if _LFN_UNICODE
01728             if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dir[i]))
01729                 c = c << 8 | dir[i++];
01730             c = ff_convert(c, 1);   /* OEM -> Unicode */
01731             if (!c) c = '?';
01732 #endif
01733 #endif
01734             *p++ = c;
01735         }
01736         fno->fattrib = dir[DIR_Attr];               /* Attribute */
01737         fno->fsize = LD_DWORD(dir + DIR_FileSize);  /* Size */
01738         fno->fdate = LD_WORD(dir + DIR_WrtDate);    /* Date */
01739         fno->ftime = LD_WORD(dir + DIR_WrtTime);    /* Time */
01740     }
01741     *p = 0;     /* Terminate SFN string by a \0 */
01742 
01743 #if _USE_LFN
01744     if (fno->lfname) {
01745         i = 0; p = fno->lfname;
01746         if (dp->sect && fno->lfsize && dp->lfn_idx != 0xFFFF) { /* Get LFN if available */
01747             lfn = dp->lfn;
01748             while ((w = *lfn++) != 0) {     /* Get an LFN character */
01749 #if !_LFN_UNICODE
01750                 w = ff_convert(w, 0);       /* Unicode -> OEM */
01751                 if (!w) { i = 0; break; }   /* No LFN if it could not be converted */
01752                 if (_DF1S && w >= 0x100)    /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
01753                     p[i++] = (TCHAR)(w >> 8);
01754 #endif
01755                 if (i >= fno->lfsize - 1) { i = 0; break; } /* No LFN if buffer overflow */
01756                 p[i++] = (TCHAR)w;
01757             }
01758         }
01759         p[i] = 0;   /* Terminate LFN string by a \0 */
01760     }
01761 #endif
01762 }
01763 #endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */
01764 
01765 
01766 
01767 
01768 /*-----------------------------------------------------------------------*/
01769 /* Pattern matching                                                      */
01770 /*-----------------------------------------------------------------------*/
01771 #if _USE_FIND && _FS_MINIMIZE <= 1
01772 static
01773 WCHAR get_achar (       /* Get a character and advances ptr 1 or 2 */
01774     const TCHAR** ptr   /* Pointer to pointer to the SBCS/DBCS/Unicode string */
01775 )
01776 {
01777     WCHAR chr;
01778 
01779 #if !_LFN_UNICODE
01780     chr = (BYTE)*(*ptr)++;                  /* Get a byte */
01781     if (IsLower(chr)) chr -= 0x20;          /* To upper ASCII char */
01782     if (IsDBCS1(chr) && IsDBCS2(**ptr))     /* Get DBC 2nd byte if needed */
01783         chr = chr << 8 | (BYTE)*(*ptr)++;
01784 #ifdef _EXCVT
01785     if (chr >= 0x80) chr = ExCvt[chr - 0x80];   /* To upper SBCS extended char */
01786 #endif
01787 #else
01788     chr = ff_wtoupper(*(*ptr)++);           /* Get a word and to upper */
01789 #endif
01790     return chr;
01791 }
01792 
01793 
01794 static
01795 int pattern_matching (  /* 0:mismatched, 1:matched */
01796     const TCHAR* pat,   /* Matching pattern */
01797     const TCHAR* nam,   /* String to be tested */
01798     int skip,           /* Number of pre-skip chars (number of ?s) */
01799     int inf             /* Infinite search (* specified) */
01800 )
01801 {
01802     const TCHAR *pp, *np;
01803     WCHAR pc, nc;
01804     int nm, nx;
01805 
01806 
01807     while (skip--) {                /* Pre-skip name chars */
01808         if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */
01809     }
01810     if (!*pat && inf) return 1;     /* (short circuit) */
01811 
01812     do {
01813         pp = pat; np = nam;         /* Top of pattern and name to match */
01814         for (;;) {
01815             if (*pp == '?' || *pp == '*') { /* Wildcard? */
01816                 nm = nx = 0;
01817                 do {                /* Analyze the wildcard chars */
01818                     if (*pp++ == '?') nm++; else nx = 1;
01819                 } while (*pp == '?' || *pp == '*');
01820                 if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */
01821                 nc = *np; break;    /* Branch mismatched */
01822             }
01823             pc = get_achar(&pp);    /* Get a pattern char */
01824             nc = get_achar(&np);    /* Get a name char */
01825             if (pc != nc) break;    /* Branch mismatched? */
01826             if (!pc) return 1;      /* Branch matched? (matched at end of both strings) */
01827         }
01828         get_achar(&nam);            /* nam++ */
01829     } while (inf && nc);            /* Retry until end of name if infinite search is specified */
01830 
01831     return 0;
01832 }
01833 #endif /* _USE_FIND && _FS_MINIMIZE <= 1 */
01834 
01835 
01836 
01837 
01838 /*-----------------------------------------------------------------------*/
01839 /* Pick a top segment and create the object name in directory form       */
01840 /*-----------------------------------------------------------------------*/
01841 
01842 static
01843 FRESULT create_name (   /* FR_OK: successful, FR_INVALID_NAME: could not create */
01844     FATFS_DIR* dp,          /* Pointer to the directory object */
01845     const TCHAR** path  /* Pointer to pointer to the segment in the path string */
01846 )
01847 {
01848 #if _USE_LFN    /* LFN configuration */
01849     BYTE b, cf;
01850     WCHAR w, *lfn;
01851     UINT i, ni, si, di;
01852     const TCHAR *p;
01853 
01854     /* Create LFN in Unicode */
01855     for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
01856     lfn = dp->lfn;
01857     si = di = 0;
01858     for (;;) {
01859         w = p[si++];                    /* Get a character */
01860         if (w < ' ' || w == '/' || w == '\\') break;    /* Break on end of segment */
01861         if (di >= _MAX_LFN)             /* Reject too long name */
01862             return FR_INVALID_NAME;
01863 #if !_LFN_UNICODE
01864         w &= 0xFF;
01865         if (IsDBCS1(w)) {               /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
01866             b = (BYTE)p[si++];          /* Get 2nd byte */
01867             w = (w << 8) + b;           /* Create a DBC */
01868             if (!IsDBCS2(b))
01869                 return FR_INVALID_NAME; /* Reject invalid sequence */
01870         }
01871         w = ff_convert(w, 1);           /* Convert ANSI/OEM to Unicode */
01872         if (!w) return FR_INVALID_NAME; /* Reject invalid code */
01873 #endif
01874         if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal characters for LFN */
01875             return FR_INVALID_NAME;
01876         lfn[di++] = w;                  /* Store the Unicode character */
01877     }
01878     *path = &p[si];                     /* Return pointer to the next segment */
01879     cf = (w < ' ') ? NS_LAST : 0;       /* Set last segment flag if end of path */
01880 #if _FS_RPATH
01881     if ((di == 1 && lfn[di - 1] == '.') ||
01882         (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) {    /* Is this segment a dot entry? */
01883         lfn[di] = 0;
01884         for (i = 0; i < 11; i++)        /* Create dot name for SFN entry */
01885             dp->fn[i] = (i < di) ? '.' : ' ';
01886         dp->fn[i] = cf | NS_DOT;        /* This is a dot entry */
01887         return FR_OK;
01888     }
01889 #endif
01890     while (di) {                        /* Snip off trailing spaces and dots if exist */
01891         w = lfn[di - 1];
01892         if (w != ' ' && w != '.') break;
01893         di--;
01894     }
01895     if (!di) return FR_INVALID_NAME;    /* Reject nul string */
01896     lfn[di] = 0;                        /* LFN is created */
01897 
01898     /* Create SFN in directory form */
01899     mem_set(dp->fn, ' ', 11);
01900     for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ;  /* Strip leading spaces and dots */
01901     if (si) cf |= NS_LOSS | NS_LFN;
01902     while (di && lfn[di - 1] != '.') di--;  /* Find extension (di<=si: no extension) */
01903 
01904     b = i = 0; ni = 8;
01905     for (;;) {
01906         w = lfn[si++];                  /* Get an LFN character */
01907         if (!w) break;                  /* Break on end of the LFN */
01908         if (w == ' ' || (w == '.' && si != di)) {   /* Remove spaces and dots */
01909             cf |= NS_LOSS | NS_LFN; continue;
01910         }
01911 
01912         if (i >= ni || si == di) {      /* Extension or end of SFN */
01913             if (ni == 11) {             /* Long extension */
01914                 cf |= NS_LOSS | NS_LFN; break;
01915             }
01916             if (si != di) cf |= NS_LOSS | NS_LFN;   /* Out of 8.3 format */
01917             if (si > di) break;         /* No extension */
01918             si = di; i = 8; ni = 11;    /* Enter extension section */
01919             b <<= 2; continue;
01920         }
01921 
01922         if (w >= 0x80) {                /* Non ASCII character */
01923 #ifdef _EXCVT
01924             w = ff_convert(w, 0);       /* Unicode -> OEM code */
01925             if (w) w = ExCvt[w - 0x80]; /* Convert extended character to upper (SBCS) */
01926 #else
01927             w = ff_convert(ff_wtoupper(w), 0);  /* Upper converted Unicode -> OEM code */
01928 #endif
01929             cf |= NS_LFN;               /* Force create LFN entry */
01930         }
01931 
01932         if (_DF1S && w >= 0x100) {      /* Is this DBC? (always false at SBCS cfg) */
01933             if (i >= ni - 1) {
01934                 cf |= NS_LOSS | NS_LFN; i = ni; continue;
01935             }
01936             dp->fn[i++] = (BYTE)(w >> 8);
01937         } else {                        /* SBC */
01938             if (!w || chk_chr("+,;=[]", w)) {   /* Replace illegal characters for SFN */
01939                 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
01940             } else {
01941                 if (IsUpper(w)) {       /* ASCII large capital */
01942                     b |= 2;
01943                 } else {
01944                     if (IsLower(w)) {   /* ASCII small capital */
01945                         b |= 1; w -= 0x20;
01946                     }
01947                 }
01948             }
01949         }
01950         dp->fn[i++] = (BYTE)w;
01951     }
01952 
01953     if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM;   /* If the first character collides with DDEM, replace it with RDDEM */
01954 
01955     if (ni == 8) b <<= 2;
01956     if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03)   /* Create LFN entry when there are composite capitals */
01957         cf |= NS_LFN;
01958     if (!(cf & NS_LFN)) {                       /* When LFN is in 8.3 format without extended character, NT flags are created */
01959         if ((b & 0x03) == 0x01) cf |= NS_EXT;   /* NT flag (Extension has only small capital) */
01960         if ((b & 0x0C) == 0x04) cf |= NS_BODY;  /* NT flag (Filename has only small capital) */
01961     }
01962 
01963     dp->fn[NSFLAG] = cf;    /* SFN is created */
01964 
01965     return FR_OK;
01966 
01967 
01968 #else   /* Non-LFN configuration */
01969     BYTE b, c, d, *sfn;
01970     UINT ni, si, i;
01971     const char *p;
01972 
01973     /* Create file name in directory form */
01974     for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Skip duplicated separator */
01975     sfn = dp->fn;
01976     mem_set(sfn, ' ', 11);
01977     si = i = b = 0; ni = 8;
01978 #if _FS_RPATH
01979     if (p[si] == '.') { /* Is this a dot entry? */
01980         for (;;) {
01981             c = (BYTE)p[si++];
01982             if (c != '.' || si >= 3) break;
01983             sfn[i++] = c;
01984         }
01985         if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
01986         *path = &p[si];                                 /* Return pointer to the next segment */
01987         sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT;   /* Set last segment flag if end of path */
01988         return FR_OK;
01989     }
01990 #endif
01991     for (;;) {
01992         c = (BYTE)p[si++];
01993         if (c <= ' ' || c == '/' || c == '\\') break;   /* Break on end of segment */
01994         if (c == '.' || i >= ni) {
01995             if (ni != 8 || c != '.') return FR_INVALID_NAME;
01996             i = 8; ni = 11;
01997             b <<= 2; continue;
01998         }
01999         if (c >= 0x80) {                /* Extended character? */
02000             b |= 3;                     /* Eliminate NT flag */
02001 #ifdef _EXCVT
02002             c = ExCvt[c - 0x80];        /* To upper extended characters (SBCS cfg) */
02003 #else
02004 #if !_DF1S
02005             return FR_INVALID_NAME;     /* Reject extended characters (ASCII cfg) */
02006 #endif
02007 #endif
02008         }
02009         if (IsDBCS1(c)) {               /* Check if it is a DBC 1st byte (always false at SBCS cfg.) */
02010             d = (BYTE)p[si++];          /* Get 2nd byte */
02011             if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
02012                 return FR_INVALID_NAME;
02013             sfn[i++] = c;
02014             sfn[i++] = d;
02015         } else {                        /* SBC */
02016             if (chk_chr("\"*+,:;<=>\?[]|\x7F", c))  /* Reject illegal chrs for SFN */
02017                 return FR_INVALID_NAME;
02018             if (IsUpper(c)) {           /* ASCII large capital? */
02019                 b |= 2;
02020             } else {
02021                 if (IsLower(c)) {       /* ASCII small capital? */
02022                     b |= 1; c -= 0x20;
02023                 }
02024             }
02025             sfn[i++] = c;
02026         }
02027     }
02028     *path = &p[si];                     /* Return pointer to the next segment */
02029     c = (c <= ' ') ? NS_LAST : 0;       /* Set last segment flag if end of path */
02030 
02031     if (!i) return FR_INVALID_NAME;     /* Reject nul string */
02032     if (sfn[0] == DDEM) sfn[0] = RDDEM; /* When first character collides with DDEM, replace it with RDDEM */
02033 
02034     if (ni == 8) b <<= 2;
02035     if ((b & 0x03) == 0x01) c |= NS_EXT;    /* NT flag (Name extension has only small capital) */
02036     if ((b & 0x0C) == 0x04) c |= NS_BODY;   /* NT flag (Name body has only small capital) */
02037 
02038     sfn[NSFLAG] = c;        /* Store NT flag, File name is created */
02039 
02040     return FR_OK;
02041 #endif
02042 }
02043 
02044 
02045 
02046 
02047 /*-----------------------------------------------------------------------*/
02048 /* Follow a file path                                                    */
02049 /*-----------------------------------------------------------------------*/
02050 
02051 static
02052 FRESULT follow_path (   /* FR_OK(0): successful, !=0: error code */
02053     FATFS_DIR* dp,          /* Directory object to return last directory and found object */
02054     const TCHAR* path   /* Full-path string to find a file or directory */
02055 )
02056 {
02057     FRESULT res;
02058     BYTE *dir, ns;
02059 
02060 
02061 #if _FS_RPATH
02062     if (*path == '/' || *path == '\\') {    /* There is a heading separator */
02063         path++; dp->sclust = 0;             /* Strip it and start from the root directory */
02064     } else {                                /* No heading separator */
02065         dp->sclust = dp->fs->cdir;          /* Start from the current directory */
02066     }
02067 #else
02068     if (*path == '/' || *path == '\\')      /* Strip heading separator if exist */
02069         path++;
02070     dp->sclust = 0;                         /* Always start from the root directory */
02071 #endif
02072 
02073     if ((UINT)*path < ' ') {                /* Null path name is the origin directory itself */
02074         res = dir_sdi(dp, 0);
02075         dp->dir = 0;
02076     } else {                                /* Follow path */
02077         for (;;) {
02078             res = create_name(dp, &path);   /* Get a segment name of the path */
02079             if (res != FR_OK) break;
02080             res = dir_find(dp);             /* Find an object with the sagment name */
02081             ns = dp->fn[NSFLAG];
02082             if (res != FR_OK) {             /* Failed to find the object */
02083                 if (res == FR_NO_FILE) {    /* Object is not found */
02084                     if (_FS_RPATH && (ns & NS_DOT)) {   /* If dot entry is not exist, */
02085                         dp->sclust = 0; dp->dir = 0;    /* it is the root directory and stay there */
02086                         if (!(ns & NS_LAST)) continue;  /* Continue to follow if not last segment */
02087                         res = FR_OK;                    /* Ended at the root directroy. Function completed. */
02088                     } else {                            /* Could not find the object */
02089                         if (!(ns & NS_LAST)) res = FR_NO_PATH;  /* Adjust error code if not last segment */
02090                     }
02091                 }
02092                 break;
02093             }
02094             if (ns & NS_LAST) break;            /* Last segment matched. Function completed. */
02095             dir = dp->dir;                      /* Follow the sub-directory */
02096             if (!(dir[DIR_Attr] & AM_DIR)) {    /* It is not a sub-directory and cannot follow */
02097                 res = FR_NO_PATH; break;
02098             }
02099             dp->sclust = ld_clust(dp->fs, dir);
02100         }
02101     }
02102 
02103     return res;
02104 }
02105 
02106 
02107 
02108 
02109 /*-----------------------------------------------------------------------*/
02110 /* Get logical drive number from path name                               */
02111 /*-----------------------------------------------------------------------*/
02112 
02113 static
02114 int get_ldnumber (      /* Returns logical drive number (-1:invalid drive) */
02115     const TCHAR** path  /* Pointer to pointer to the path name */
02116 )
02117 {
02118     const TCHAR *tp, *tt;
02119     UINT i;
02120     int vol = -1;
02121 #if _STR_VOLUME_ID      /* Find string drive id */
02122     static const char* const str[] = {_VOLUME_STRS};
02123     const char *sp;
02124     char c;
02125     TCHAR tc;
02126 #endif
02127 
02128 
02129     if (*path) {    /* If the pointer is not a null */
02130         for (tt = *path; (UINT)*tt >= (_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find ':' in the path */
02131         if (*tt == ':') {   /* If a ':' is exist in the path name */
02132             tp = *path;
02133             i = *tp++ - '0'; 
02134             if (i < 10 && tp == tt) {   /* Is there a numeric drive id? */
02135                 if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
02136                     vol = (int)i;
02137                     *path = ++tt;
02138                 }
02139             }
02140 #if _STR_VOLUME_ID
02141              else { /* No numeric drive number, find string drive id */
02142                 i = 0; tt++;
02143                 do {
02144                     sp = str[i]; tp = *path;
02145                     do {    /* Compare a string drive id with path name */
02146                         c = *sp++; tc = *tp++;
02147                         if (IsLower(tc)) tc -= 0x20;
02148                     } while (c && (TCHAR)c == tc);
02149                 } while ((c || tp != tt) && ++i < _VOLUMES);    /* Repeat for each id until pattern match */
02150                 if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
02151                     vol = (int)i;
02152                     *path = tt;
02153                 }
02154             }
02155 #endif
02156             return vol;
02157         }
02158 #if _FS_RPATH && _VOLUMES >= 2
02159         vol = CurrVol;  /* Current drive */
02160 #else
02161         vol = 0;        /* Drive 0 */
02162 #endif
02163     }
02164     return vol;
02165 }
02166 
02167 
02168 
02169 
02170 /*-----------------------------------------------------------------------*/
02171 /* Load a sector and check if it is an FAT boot sector                   */
02172 /*-----------------------------------------------------------------------*/
02173 
02174 static
02175 BYTE check_fs ( /* 0:Valid FAT-BS, 1:Valid BS but not FAT, 2:Not a BS, 3:Disk error */
02176     FATFS* fs,  /* File system object */
02177     DWORD sect  /* Sector# (lba) to check if it is an FAT boot record or not */
02178 )
02179 {
02180     fs->wflag = 0; fs->winsect = 0xFFFFFFFF;    /* Invaidate window */
02181     if (move_window(fs, sect) != FR_OK)         /* Load boot record */
02182         return 3;
02183 
02184     if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55)   /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */
02185         return 2;
02186 
02187     if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146)     /* Check "FAT" string */
02188         return 0;
02189     if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)   /* Check "FAT" string */
02190         return 0;
02191 
02192     return 1;
02193 }
02194 
02195 
02196 
02197 
02198 /*-----------------------------------------------------------------------*/
02199 /* Find logical drive and check if the volume is mounted                 */
02200 /*-----------------------------------------------------------------------*/
02201 
02202 static
02203 FRESULT find_volume (   /* FR_OK(0): successful, !=0: any error occurred */
02204     FATFS** rfs,        /* Pointer to pointer to the found file system object */
02205     const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
02206     BYTE wmode          /* !=0: Check write protection for write access */
02207 )
02208 {
02209     BYTE fmt, *pt;
02210     int vol;
02211     DSTATUS stat;
02212     DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4];
02213     WORD nrsv;
02214     FATFS *fs;
02215     UINT i;
02216 
02217 
02218     /* Get logical drive number from the path name */
02219     *rfs = 0;
02220     vol = get_ldnumber(path);
02221     if (vol < 0) return FR_INVALID_DRIVE;
02222 
02223     /* Check if the file system object is valid or not */
02224     fs = FatFs[vol];                    /* Get pointer to the file system object */
02225     if (!fs) return FR_NOT_ENABLED;     /* Is the file system object available? */
02226 
02227     ENTER_FF(fs);                       /* Lock the volume */
02228     *rfs = fs;                          /* Return pointer to the file system object */
02229 
02230     if (fs->fs_type) {                  /* If the volume has been mounted */
02231         stat = disk_status(fs->drv);
02232         if (!(stat & STA_NOINIT)) {     /* and the physical drive is kept initialized */
02233             if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */
02234                 return FR_WRITE_PROTECTED;
02235             return FR_OK;               /* The file system object is valid */
02236         }
02237     }
02238 
02239     /* The file system object is not valid. */
02240     /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
02241 
02242     fs->fs_type = 0;                    /* Clear the file system object */
02243     fs->drv = LD2PD(vol);               /* Bind the logical drive and a physical drive */
02244     stat = disk_initialize(fs->drv);    /* Initialize the physical drive */
02245     if (stat & STA_NOINIT)              /* Check if the initialization succeeded */
02246         return FR_NOT_READY;            /* Failed to initialize due to no medium or hard error */
02247     if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */
02248         return FR_WRITE_PROTECTED;
02249 #if _MAX_SS != _MIN_SS                      /* Get sector size (multiple sector size cfg only) */
02250     if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
02251         || SS(fs) < _MIN_SS || SS(fs) > _MAX_SS) return FR_DISK_ERR;
02252 #endif
02253 #if _FS_HEAPBUF
02254     if (!fs->win) {
02255         fs->win = (BYTE*)ff_memalloc(SS(fs));   /* Allocate buffer to back window if necessary */
02256         if (!fs->win)
02257             return FR_NOT_ENOUGH_CORE;
02258     }
02259 #endif
02260     /* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */
02261     bsect = 0;
02262     fmt = check_fs(fs, bsect);                  /* Load sector 0 and check if it is an FAT boot sector as SFD */
02263     if (fmt == 1 || (!fmt && (LD2PT(vol)))) {   /* Not an FAT boot sector or forced partition number */
02264         for (i = 0; i < 4; i++) {           /* Get partition offset */
02265             pt = fs->win + MBR_Table + i * SZ_PTE;
02266             br[i] = pt[4] ? LD_DWORD(&pt[8]) : 0;
02267         }
02268         i = LD2PT(vol);                     /* Partition number: 0:auto, 1-4:forced */
02269         if (i) i--;
02270         do {                                /* Find an FAT volume */
02271             bsect = br[i];
02272             fmt = bsect ? check_fs(fs, bsect) : 2;  /* Check the partition */
02273         } while (!LD2PT(vol) && fmt && ++i < 4);
02274     }
02275     if (fmt == 3) return FR_DISK_ERR;       /* An error occured in the disk I/O layer */
02276     if (fmt) return FR_NO_FILESYSTEM;       /* No FAT volume is found */
02277 
02278     /* An FAT volume is found. Following code initializes the file system object */
02279 
02280     if (LD_WORD(fs->win + BPB_BytsPerSec) != SS(fs))    /* (BPB_BytsPerSec must be equal to the physical sector size) */
02281         return FR_NO_FILESYSTEM;
02282 
02283     fasize = LD_WORD(fs->win + BPB_FATSz16);            /* Number of sectors per FAT */
02284     if (!fasize) fasize = LD_DWORD(fs->win + BPB_FATSz32);
02285     fs->fsize = fasize;
02286 
02287     fs->n_fats = fs->win[BPB_NumFATs];                  /* Number of FAT copies */
02288     if (fs->n_fats != 1 && fs->n_fats != 2)             /* (Must be 1 or 2) */
02289         return FR_NO_FILESYSTEM;
02290     fasize *= fs->n_fats;                               /* Number of sectors for FAT area */
02291 
02292     fs->csize = fs->win[BPB_SecPerClus];                /* Number of sectors per cluster */
02293     if (!fs->csize || (fs->csize & (fs->csize - 1)))    /* (Must be power of 2) */
02294         return FR_NO_FILESYSTEM;
02295 
02296     fs->n_rootdir = LD_WORD(fs->win + BPB_RootEntCnt);  /* Number of root directory entries */
02297     if (fs->n_rootdir % (SS(fs) / SZ_DIRE))             /* (Must be sector aligned) */
02298         return FR_NO_FILESYSTEM;
02299 
02300     tsect = LD_WORD(fs->win + BPB_TotSec16);            /* Number of sectors on the volume */
02301     if (!tsect) tsect = LD_DWORD(fs->win + BPB_TotSec32);
02302 
02303     nrsv = LD_WORD(fs->win + BPB_RsvdSecCnt);           /* Number of reserved sectors */
02304     if (!nrsv) return FR_NO_FILESYSTEM;                 /* (Must not be 0) */
02305 
02306     /* Determine the FAT sub type */
02307     sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIRE);    /* RSV + FAT + FATFS_DIR */
02308     if (tsect < sysect) return FR_NO_FILESYSTEM;        /* (Invalid volume size) */
02309     nclst = (tsect - sysect) / fs->csize;               /* Number of clusters */
02310     if (!nclst) return FR_NO_FILESYSTEM;                /* (Invalid volume size) */
02311     fmt = FS_FAT12;
02312     if (nclst >= MIN_FAT16) fmt = FS_FAT16;
02313     if (nclst >= MIN_FAT32) fmt = FS_FAT32;
02314 
02315     /* Boundaries and Limits */
02316     fs->n_fatent = nclst + 2;                           /* Number of FAT entries */
02317     fs->volbase = bsect;                                /* Volume start sector */
02318     fs->fatbase = bsect + nrsv;                         /* FAT start sector */
02319     fs->database = bsect + sysect;                      /* Data start sector */
02320     if (fmt == FS_FAT32) {
02321         if (fs->n_rootdir) return FR_NO_FILESYSTEM;     /* (BPB_RootEntCnt must be 0) */
02322         fs->dirbase = LD_DWORD(fs->win + BPB_RootClus); /* Root directory start cluster */
02323         szbfat = fs->n_fatent * 4;                      /* (Needed FAT size) */
02324     } else {
02325         if (!fs->n_rootdir) return FR_NO_FILESYSTEM;    /* (BPB_RootEntCnt must not be 0) */
02326         fs->dirbase = fs->fatbase + fasize;             /* Root directory start sector */
02327         szbfat = (fmt == FS_FAT16) ?                    /* (Needed FAT size) */
02328             fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
02329     }
02330     if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs))   /* (BPB_FATSz must not be less than the size needed) */
02331         return FR_NO_FILESYSTEM;
02332 
02333 #if !_FS_READONLY
02334     /* Initialize cluster allocation information */
02335     fs->last_clust = fs->free_clust = 0xFFFFFFFF;
02336 
02337     /* Get fsinfo if available */
02338     fs->fsi_flag = 0x80;
02339 #if (_FS_NOFSINFO & 3) != 3
02340     if (fmt == FS_FAT32             /* Enable FSINFO only if FAT32 and BPB_FSInfo == 1 */
02341         && LD_WORD(fs->win + BPB_FSInfo) == 1
02342         && move_window(fs, bsect + 1) == FR_OK)
02343     {
02344         fs->fsi_flag = 0;
02345         if (LD_WORD(fs->win + BS_55AA) == 0xAA55    /* Load FSINFO data if available */
02346             && LD_DWORD(fs->win + FSI_LeadSig) == 0x41615252
02347             && LD_DWORD(fs->win + FSI_StrucSig) == 0x61417272)
02348         {
02349 #if (_FS_NOFSINFO & 1) == 0
02350             fs->free_clust = LD_DWORD(fs->win + FSI_Free_Count);
02351 #endif
02352 #if (_FS_NOFSINFO & 2) == 0
02353             fs->last_clust = LD_DWORD(fs->win + FSI_Nxt_Free);
02354 #endif
02355         }
02356     }
02357 #endif
02358 #endif
02359     fs->fs_type = fmt;  /* FAT sub-type */
02360     fs->id = ++Fsid;    /* File system mount ID */
02361 #if _FS_RPATH
02362     fs->cdir = 0;       /* Set current directory to root */
02363 #endif
02364 #if _FS_LOCK            /* Clear file lock semaphores */
02365     clear_lock(fs);
02366 #endif
02367 
02368     return FR_OK;
02369 }
02370 
02371 
02372 
02373 
02374 /*-----------------------------------------------------------------------*/
02375 /* Check if the file/directory object is valid or not                    */
02376 /*-----------------------------------------------------------------------*/
02377 
02378 static
02379 FRESULT validate (  /* FR_OK(0): The object is valid, !=0: Invalid */
02380     void* obj       /* Pointer to the object FIL/FATFS_DIR to check validity */
02381 )
02382 {
02383     FIL *fil = (FIL*)obj;   /* Assuming offset of .fs and .id in the FIL/FATFS_DIR structure is identical */
02384 
02385 
02386     if (!fil || !fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id || (disk_status(fil->fs->drv) & STA_NOINIT))
02387         return FR_INVALID_OBJECT;
02388 
02389     ENTER_FF(fil->fs);      /* Lock file system */
02390 
02391     return FR_OK;
02392 }
02393 
02394 
02395 
02396 
02397 /*--------------------------------------------------------------------------
02398 
02399    Public Functions
02400 
02401 ---------------------------------------------------------------------------*/
02402 
02403 
02404 
02405 /*-----------------------------------------------------------------------*/
02406 /* Mount/Unmount a Logical Drive                                         */
02407 /*-----------------------------------------------------------------------*/
02408 
02409 FRESULT f_mount (
02410     FATFS* fs,          /* Pointer to the file system object (NULL:unmount)*/
02411     const TCHAR* path,  /* Logical drive number to be mounted/unmounted */
02412     BYTE opt            /* 0:Do not mount (delayed mount), 1:Mount immediately */
02413 )
02414 {
02415     FATFS *cfs;
02416     int vol;
02417     FRESULT res;
02418     const TCHAR *rp = path;
02419 
02420 
02421     vol = get_ldnumber(&rp);
02422     if (vol < 0) return FR_INVALID_DRIVE;
02423     cfs = FatFs[vol];                   /* Pointer to fs object */
02424 
02425     if (cfs) {
02426 #if _FS_LOCK
02427         clear_lock(cfs);
02428 #endif
02429 #if _FS_REENTRANT                       /* Discard sync object of the current volume */
02430         if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
02431 #endif
02432         cfs->fs_type = 0;               /* Clear old fs object */
02433 #if _FS_HEAPBUF
02434         ff_memfree(cfs->win);           /* Clean up window buffer */
02435 #endif
02436     }
02437 
02438     if (fs) {
02439         fs->fs_type = 0;                /* Clear new fs object */
02440 #if _FS_REENTRANT                       /* Create sync object for the new volume */
02441         if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
02442 #endif
02443 #if _FS_HEAPBUF
02444         fs->win = 0;                    /* NULL buffer to prevent use of uninitialized buffer */
02445 #endif
02446     }
02447     FatFs[vol] = fs;                    /* Register new fs object */
02448 
02449     if (!fs || opt != 1) return FR_OK;  /* Do not mount now, it will be mounted later */
02450 
02451     res = find_volume(&fs, &path, 0);   /* Force mounted the volume */
02452     LEAVE_FF(fs, res);
02453 }
02454 
02455 
02456 
02457 
02458 /*-----------------------------------------------------------------------*/
02459 /* Open or Create a File                                                 */
02460 /*-----------------------------------------------------------------------*/
02461 
02462 FRESULT f_open (
02463     FIL* fp,            /* Pointer to the blank file object */
02464     const TCHAR* path,  /* Pointer to the file name */
02465     BYTE mode           /* Access mode and file open mode flags */
02466 )
02467 {
02468     FRESULT res;
02469     FATFS_DIR dj;
02470     BYTE *dir;
02471     DEFINE_NAMEBUF;
02472 #if !_FS_READONLY
02473     DWORD dw, cl;
02474 #endif
02475 
02476 
02477     if (!fp) return FR_INVALID_OBJECT;
02478     fp->fs = 0;         /* Clear file object */
02479 
02480     /* Get logical drive number */
02481 #if !_FS_READONLY
02482     mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
02483     res = find_volume(&dj.fs, &path, (BYTE)(mode & ~FA_READ));
02484 #else
02485     mode &= FA_READ;
02486     res = find_volume(&dj.fs, &path, 0);
02487 #endif
02488     if (res == FR_OK) {
02489         INIT_BUF(dj);
02490         res = follow_path(&dj, path);   /* Follow the file path */
02491         dir = dj.dir;
02492 #if !_FS_READONLY   /* R/W configuration */
02493         if (res == FR_OK) {
02494             if (!dir)   /* Default directory itself */
02495                 res = FR_INVALID_NAME;
02496 #if _FS_LOCK
02497             else
02498                 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
02499 #endif
02500         }
02501         /* Create or Open a file */
02502         if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
02503             if (res != FR_OK) {                 /* No file, create new */
02504                 if (res == FR_NO_FILE)          /* There is no file to open, create a new entry */
02505 #if _FS_LOCK
02506                     res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
02507 #else
02508                     res = dir_register(&dj);
02509 #endif
02510                 mode |= FA_CREATE_ALWAYS;       /* File is created */
02511                 dir = dj.dir;                   /* New entry */
02512             }
02513             else {                              /* Any object is already existing */
02514                 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) {    /* Cannot overwrite it (R/O or FATFS_DIR) */
02515                     res = FR_DENIED;
02516                 } else {
02517                     if (mode & FA_CREATE_NEW)   /* Cannot create as new file */
02518                         res = FR_EXIST;
02519                 }
02520             }
02521             if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) {    /* Truncate it if overwrite mode */
02522                 dw = GET_FATTIME();
02523                 ST_DWORD(dir + DIR_CrtTime, dw);/* Set created time */
02524                 ST_DWORD(dir + DIR_WrtTime, dw);/* Set modified time */
02525                 dir[DIR_Attr] = 0;              /* Reset attribute */
02526                 ST_DWORD(dir + DIR_FileSize, 0);/* Reset file size */
02527                 cl = ld_clust(dj.fs, dir);      /* Get cluster chain */
02528                 st_clust(dir, 0);               /* Reset cluster */
02529                 dj.fs->wflag = 1;
02530                 if (cl) {                       /* Remove the cluster chain if exist */
02531                     dw = dj.fs->winsect;
02532                     res = remove_chain(dj.fs, cl);
02533                     if (res == FR_OK) {
02534                         dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
02535                         res = move_window(dj.fs, dw);
02536                     }
02537                 }
02538             }
02539         }
02540         else {  /* Open an existing file */
02541             if (res == FR_OK) {                 /* Following succeeded */
02542                 if (dir[DIR_Attr] & AM_DIR) {   /* It is a directory */
02543                     res = FR_NO_FILE;
02544                 } else {
02545                     if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
02546                         res = FR_DENIED;
02547                 }
02548             }
02549         }
02550         if (res == FR_OK) {
02551             if (mode & FA_CREATE_ALWAYS)        /* Set file change flag if created or overwritten */
02552                 mode |= FA__WRITTEN;
02553             fp->dir_sect = dj.fs->winsect;      /* Pointer to the directory entry */
02554             fp->dir_ptr = dir;
02555 #if _FS_LOCK
02556             fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
02557             if (!fp->lockid) res = FR_INT_ERR;
02558 #endif
02559         }
02560 
02561 #else               /* R/O configuration */
02562         if (res == FR_OK) {                 /* Follow succeeded */
02563             dir = dj.dir;
02564             if (!dir) {                     /* Current directory itself */
02565                 res = FR_INVALID_NAME;
02566             } else {
02567                 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */
02568                     res = FR_NO_FILE;
02569             }
02570         }
02571 #endif
02572         FREE_BUF();
02573 
02574         if (res == FR_OK) {
02575             fp->flag = mode;                    /* File access mode */
02576             fp->err = 0;                        /* Clear error flag */
02577             fp->sclust = ld_clust(dj.fs, dir);  /* File start cluster */
02578             fp->fsize = LD_DWORD(dir + DIR_FileSize);   /* File size */
02579             fp->fptr = 0;                       /* File pointer */
02580             fp->dsect = 0;
02581 #if _USE_FASTSEEK
02582             fp->cltbl = 0;                      /* Normal seek mode */
02583 #endif
02584             fp->fs = dj.fs;                     /* Validate file object */
02585             fp->id = fp->fs->id;
02586 #if !_FS_TINY && _FS_HEAPBUF
02587             fp->buf = (BYTE*)ff_memalloc(SS(dj.fs));    /* Allocate buffer if necessary */
02588             if (!fp->buf)
02589                 return FR_NOT_ENOUGH_CORE;
02590 #endif
02591         }
02592     }
02593 
02594     LEAVE_FF(dj.fs, res);
02595 }
02596 
02597 
02598 
02599 
02600 /*-----------------------------------------------------------------------*/
02601 /* Read File                                                             */
02602 /*-----------------------------------------------------------------------*/
02603 
02604 FRESULT f_read (
02605     FIL* fp,        /* Pointer to the file object */
02606     void* buff,     /* Pointer to data buffer */
02607     UINT btr,       /* Number of bytes to read */
02608     UINT* br        /* Pointer to number of bytes read */
02609 )
02610 {
02611     FRESULT res;
02612     DWORD clst, sect, remain;
02613     UINT rcnt, cc;
02614     BYTE csect, *rbuff = (BYTE*)buff;
02615 
02616 
02617     *br = 0;    /* Clear read byte counter */
02618 
02619     res = validate(fp);                         /* Check validity */
02620     if (res != FR_OK) LEAVE_FF(fp->fs, res);
02621     if (fp->err)                                /* Check error */
02622         LEAVE_FF(fp->fs, (FRESULT)fp->err);
02623     if (!(fp->flag & FA_READ))                  /* Check access mode */
02624         LEAVE_FF(fp->fs, FR_DENIED);
02625     remain = fp->fsize - fp->fptr;
02626     if (btr > remain) btr = (UINT)remain;       /* Truncate btr by remaining bytes */
02627 
02628     for ( ;  btr;                               /* Repeat until all data read */
02629         rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
02630         if ((fp->fptr % SS(fp->fs)) == 0) {     /* On the sector boundary? */
02631             csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1));    /* Sector offset in the cluster */
02632             if (!csect) {                       /* On the cluster boundary? */
02633                 if (fp->fptr == 0) {            /* On the top of the file? */
02634                     clst = fp->sclust;          /* Follow from the origin */
02635                 } else {                        /* Middle or end of the file */
02636 #if _USE_FASTSEEK
02637                     if (fp->cltbl)
02638                         clst = clmt_clust(fp, fp->fptr);    /* Get cluster# from the CLMT */
02639                     else
02640 #endif
02641                         clst = get_fat(fp->fs, fp->clust);  /* Follow cluster chain on the FAT */
02642                 }
02643                 if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
02644                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
02645                 fp->clust = clst;               /* Update current cluster */
02646             }
02647             sect = clust2sect(fp->fs, fp->clust);   /* Get current sector */
02648             if (!sect) ABORT(fp->fs, FR_INT_ERR);
02649             sect += csect;
02650             cc = btr / SS(fp->fs);              /* When remaining bytes >= sector size, */
02651             if (cc) {                           /* Read maximum contiguous sectors directly */
02652                 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
02653                     cc = fp->fs->csize - csect;
02654                 if (disk_read(fp->fs->drv, rbuff, sect, cc) != RES_OK)
02655                     ABORT(fp->fs, FR_DISK_ERR);
02656 #if !_FS_READONLY && _FS_MINIMIZE <= 2          /* Replace one of the read sectors with cached data if it contains a dirty sector */
02657 #if _FS_TINY
02658                 if (fp->fs->wflag && fp->fs->winsect - sect < cc)
02659                     mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
02660 #else
02661                 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
02662                     mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
02663 #endif
02664 #endif
02665                 rcnt = SS(fp->fs) * cc;         /* Number of bytes transferred */
02666                 continue;
02667             }
02668 #if !_FS_TINY
02669             if (fp->dsect != sect) {            /* Load data sector if not in cache */
02670 #if !_FS_READONLY
02671                 if (fp->flag & FA__DIRTY) {     /* Write-back dirty sector cache */
02672                     if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
02673                         ABORT(fp->fs, FR_DISK_ERR);
02674                     fp->flag &= ~FA__DIRTY;
02675                 }
02676 #endif
02677                 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */
02678                     ABORT(fp->fs, FR_DISK_ERR);
02679             }
02680 #endif
02681             fp->dsect = sect;
02682         }
02683         rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));  /* Get partial sector data from sector buffer */
02684         if (rcnt > btr) rcnt = btr;
02685 #if _FS_TINY
02686         if (move_window(fp->fs, fp->dsect) != FR_OK)        /* Move sector window */
02687             ABORT(fp->fs, FR_DISK_ERR);
02688         mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt);  /* Pick partial sector */
02689 #else
02690         mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt);  /* Pick partial sector */
02691 #endif
02692     }
02693 
02694     LEAVE_FF(fp->fs, FR_OK);
02695 }
02696 
02697 
02698 
02699 
02700 #if !_FS_READONLY
02701 /*-----------------------------------------------------------------------*/
02702 /* Write File                                                            */
02703 /*-----------------------------------------------------------------------*/
02704 
02705 FRESULT f_write (
02706     FIL* fp,            /* Pointer to the file object */
02707     const void *buff,   /* Pointer to the data to be written */
02708     UINT btw,           /* Number of bytes to write */
02709     UINT* bw            /* Pointer to number of bytes written */
02710 )
02711 {
02712     FRESULT res;
02713     DWORD clst, sect;
02714     UINT wcnt, cc;
02715     const BYTE *wbuff = (const BYTE*)buff;
02716     BYTE csect;
02717     bool need_sync = false;
02718 
02719     *bw = 0;    /* Clear write byte counter */
02720 
02721     res = validate(fp);                     /* Check validity */
02722     if (res != FR_OK) LEAVE_FF(fp->fs, res);
02723     if (fp->err)                            /* Check error */
02724         LEAVE_FF(fp->fs, (FRESULT)fp->err);
02725     if (!(fp->flag & FA_WRITE))             /* Check access mode */
02726         LEAVE_FF(fp->fs, FR_DENIED);
02727     if (fp->fptr + btw < fp->fptr) btw = 0; /* File size cannot reach 4GB */
02728 
02729     for ( ;  btw;                           /* Repeat until all data written */
02730         wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
02731         if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
02732             csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1));    /* Sector offset in the cluster */
02733             if (!csect) {                   /* On the cluster boundary? */
02734                 if (fp->fptr == 0) {        /* On the top of the file? */
02735                     clst = fp->sclust;      /* Follow from the origin */
02736                     if (clst == 0)          /* When no cluster is allocated, */
02737                         clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
02738                 } else {                    /* Middle or end of the file */
02739 #if _USE_FASTSEEK
02740                     if (fp->cltbl)
02741                         clst = clmt_clust(fp, fp->fptr);    /* Get cluster# from the CLMT */
02742                     else
02743 #endif
02744                         clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */
02745                 }
02746                 if (clst == 0) break;       /* Could not allocate a new cluster (disk full) */
02747                 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
02748                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
02749                 fp->clust = clst;           /* Update current cluster */
02750                 if (fp->sclust == 0) fp->sclust = clst; /* Set start cluster if the first write */
02751                 
02752 #if FLUSH_ON_NEW_CLUSTER
02753                 // We do not need to flush for the first cluster
02754                 if (fp->fptr != 0) {
02755                     need_sync = true;
02756                 }
02757 #endif
02758             }
02759 #if _FS_TINY
02760             if (fp->fs->winsect == fp->dsect && sync_window(fp->fs))    /* Write-back sector cache */
02761                 ABORT(fp->fs, FR_DISK_ERR);
02762 #else
02763             if (fp->flag & FA__DIRTY) {     /* Write-back sector cache */
02764                 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
02765                     ABORT(fp->fs, FR_DISK_ERR);
02766                 fp->flag &= ~FA__DIRTY;
02767             }
02768 #endif
02769             sect = clust2sect(fp->fs, fp->clust);   /* Get current sector */
02770             if (!sect) ABORT(fp->fs, FR_INT_ERR);
02771             sect += csect;
02772             cc = btw / SS(fp->fs);          /* When remaining bytes >= sector size, */
02773             if (cc) {                       /* Write maximum contiguous sectors directly */
02774                 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
02775                     cc = fp->fs->csize - csect;
02776                 if (disk_write(fp->fs->drv, wbuff, sect, cc) != RES_OK)
02777                     ABORT(fp->fs, FR_DISK_ERR);
02778 #if _FS_MINIMIZE <= 2
02779 #if _FS_TINY
02780                 if (fp->fs->winsect - sect < cc) {  /* Refill sector cache if it gets invalidated by the direct write */
02781                     mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
02782                     fp->fs->wflag = 0;
02783                 }
02784 #else
02785                 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
02786                     mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
02787                     fp->flag &= ~FA__DIRTY;
02788                 }
02789 #endif
02790 #endif
02791                 wcnt = SS(fp->fs) * cc;     /* Number of bytes transferred */
02792 #if FLUSH_ON_NEW_SECTOR
02793                 need_sync = true;
02794 #endif
02795                 continue;
02796             }
02797 #if _FS_TINY
02798             if (fp->fptr >= fp->fsize) {    /* Avoid silly cache filling at growing edge */
02799                 if (sync_window(fp->fs)) ABORT(fp->fs, FR_DISK_ERR);
02800                 fp->fs->winsect = sect;
02801             }
02802 #else
02803             if (fp->dsect != sect) {        /* Fill sector cache with file data */
02804                 if (fp->fptr < fp->fsize &&
02805                     disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
02806                         ABORT(fp->fs, FR_DISK_ERR);
02807             }
02808 #endif
02809             fp->dsect = sect;
02810         }
02811         wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
02812         if (wcnt > btw) wcnt = btw;
02813 #if _FS_TINY
02814         if (move_window(fp->fs, fp->dsect) != FR_OK)    /* Move sector window */
02815             ABORT(fp->fs, FR_DISK_ERR);
02816         mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt);  /* Fit partial sector */
02817         fp->fs->wflag = 1;
02818 #else
02819         mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt);  /* Fit partial sector */
02820         fp->flag |= FA__DIRTY;
02821 #endif
02822     }
02823 
02824     if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
02825     fp->flag |= FA__WRITTEN;                        /* Set file change flag */
02826 
02827     if (need_sync) {
02828         f_sync (fp);
02829     }
02830 
02831     LEAVE_FF(fp->fs, FR_OK);
02832 }
02833 
02834 
02835 
02836 
02837 /*-----------------------------------------------------------------------*/
02838 /* Synchronize the File                                                  */
02839 /*-----------------------------------------------------------------------*/
02840 
02841 FRESULT f_sync (
02842     FIL* fp     /* Pointer to the file object */
02843 )
02844 {
02845     FRESULT res;
02846     DWORD tm;
02847     BYTE *dir;
02848 
02849 
02850     res = validate(fp);                 /* Check validity of the object */
02851     if (res == FR_OK) {
02852         if (fp->flag & FA__WRITTEN) {   /* Is there any change to the file? */
02853 #if !_FS_TINY
02854             if (fp->flag & FA__DIRTY) { /* Write-back cached data if needed */
02855                 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
02856                     LEAVE_FF(fp->fs, FR_DISK_ERR);
02857                 fp->flag &= ~FA__DIRTY;
02858             }
02859 #endif
02860             /* Update the directory entry */
02861             res = move_window(fp->fs, fp->dir_sect);
02862             if (res == FR_OK) {
02863                 dir = fp->dir_ptr;
02864                 dir[DIR_Attr] |= AM_ARC;                    /* Set archive bit */
02865                 ST_DWORD(dir + DIR_FileSize, fp->fsize);    /* Update file size */
02866                 st_clust(dir, fp->sclust);                  /* Update start cluster */
02867                 tm = GET_FATTIME();                         /* Update modified time */
02868                 ST_DWORD(dir + DIR_WrtTime, tm);
02869                 ST_WORD(dir + DIR_LstAccDate, 0);
02870                 fp->flag &= ~FA__WRITTEN;
02871                 fp->fs->wflag = 1;
02872                 res = sync_fs(fp->fs);
02873             }
02874         }
02875     }
02876 
02877     LEAVE_FF(fp->fs, res);
02878 }
02879 
02880 #endif /* !_FS_READONLY */
02881 
02882 
02883 
02884 
02885 /*-----------------------------------------------------------------------*/
02886 /* Close File                                                            */
02887 /*-----------------------------------------------------------------------*/
02888 
02889 FRESULT f_close (
02890     FIL *fp     /* Pointer to the file object to be closed */
02891 )
02892 {
02893     FRESULT res;
02894 
02895 
02896 #if !_FS_READONLY
02897     res = f_sync(fp);                   /* Flush cached data */
02898     if (res == FR_OK)
02899 #endif
02900     {
02901         res = validate(fp);             /* Lock volume */
02902         if (res == FR_OK) {
02903 #if _FS_REENTRANT
02904             FATFS *fs = fp->fs;
02905 #endif
02906 #if _FS_LOCK
02907             res = dec_lock(fp->lockid); /* Decrement file open counter */
02908             if (res == FR_OK)
02909 #endif
02910                 fp->fs = 0;             /* Invalidate file object */
02911 #if _FS_REENTRANT
02912             unlock_fs(fs, FR_OK);       /* Unlock volume */
02913 #endif
02914 #if !_FS_TINY && _FS_HEAPBUF
02915             ff_memfree(fp->buf);        /* Deallocate buffer */
02916 #endif
02917         }
02918     }
02919     return res;
02920 }
02921 
02922 
02923 
02924 
02925 /*-----------------------------------------------------------------------*/
02926 /* Change Current Directory or Current Drive, Get Current Directory      */
02927 /*-----------------------------------------------------------------------*/
02928 
02929 #if _FS_RPATH >= 1
02930 #if _VOLUMES >= 2
02931 FRESULT f_chdrive (
02932     const TCHAR* path       /* Drive number */
02933 )
02934 {
02935     int vol;
02936 
02937 
02938     vol = get_ldnumber(&path);
02939     if (vol < 0) return FR_INVALID_DRIVE;
02940 
02941     CurrVol = (BYTE)vol;
02942 
02943     return FR_OK;
02944 }
02945 #endif
02946 
02947 
02948 FRESULT f_chdir (
02949     const TCHAR* path   /* Pointer to the directory path */
02950 )
02951 {
02952     FRESULT res;
02953     FATFS_DIR dj;
02954     DEFINE_NAMEBUF;
02955 
02956 
02957     /* Get logical drive number */
02958     res = find_volume(&dj.fs, &path, 0);
02959     if (res == FR_OK) {
02960         INIT_BUF(dj);
02961         res = follow_path(&dj, path);       /* Follow the path */
02962         FREE_BUF();
02963         if (res == FR_OK) {                 /* Follow completed */
02964             if (!dj.dir) {
02965                 dj.fs->cdir = dj.sclust;    /* Start directory itself */
02966             } else {
02967                 if (dj.dir[DIR_Attr] & AM_DIR)  /* Reached to the directory */
02968                     dj.fs->cdir = ld_clust(dj.fs, dj.dir);
02969                 else
02970                     res = FR_NO_PATH;       /* Reached but a file */
02971             }
02972         }
02973         if (res == FR_NO_FILE) res = FR_NO_PATH;
02974     }
02975 
02976     LEAVE_FF(dj.fs, res);
02977 }
02978 
02979 
02980 #if _FS_RPATH >= 2
02981 FRESULT f_getcwd (
02982     TCHAR* buff,    /* Pointer to the directory path */
02983     UINT len        /* Size of path */
02984 )
02985 {
02986     FRESULT res;
02987     FATFS_DIR dj;
02988     UINT i, n;
02989     DWORD ccl;
02990     TCHAR *tp;
02991     FILINFO fno;
02992     DEFINE_NAMEBUF;
02993 
02994 
02995     *buff = 0;
02996     /* Get logical drive number */
02997     res = find_volume(&dj.fs, (const TCHAR**)&buff, 0); /* Get current volume */
02998     if (res == FR_OK) {
02999         INIT_BUF(dj);
03000         i = len;            /* Bottom of buffer (directory stack base) */
03001         dj.sclust = dj.fs->cdir;            /* Start to follow upper directory from current directory */
03002         while ((ccl = dj.sclust) != 0) {    /* Repeat while current directory is a sub-directory */
03003             res = dir_sdi(&dj, 1);          /* Get parent directory */
03004             if (res != FR_OK) break;
03005             res = dir_read(&dj, 0);
03006             if (res != FR_OK) break;
03007             dj.sclust = ld_clust(dj.fs, dj.dir);    /* Goto parent directory */
03008             res = dir_sdi(&dj, 0);
03009             if (res != FR_OK) break;
03010             do {                            /* Find the entry links to the child directory */
03011                 res = dir_read(&dj, 0);
03012                 if (res != FR_OK) break;
03013                 if (ccl == ld_clust(dj.fs, dj.dir)) break;  /* Found the entry */
03014                 res = dir_next(&dj, 0); 
03015             } while (res == FR_OK);
03016             if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
03017             if (res != FR_OK) break;
03018 #if _USE_LFN
03019             fno.lfname = buff;
03020             fno.lfsize = i;
03021 #endif
03022             get_fileinfo(&dj, &fno);        /* Get the directory name and push it to the buffer */
03023             tp = fno.fname;
03024 #if _USE_LFN
03025             if (*buff) tp = buff;
03026 #endif
03027             for (n = 0; tp[n]; n++) ;
03028             if (i < n + 3) {
03029                 res = FR_NOT_ENOUGH_CORE; break;
03030             }
03031             while (n) buff[--i] = tp[--n];
03032             buff[--i] = '/';
03033         }
03034         tp = buff;
03035         if (res == FR_OK) {
03036 #if _VOLUMES >= 2
03037             *tp++ = '0' + CurrVol;          /* Put drive number */
03038             *tp++ = ':';
03039 #endif
03040             if (i == len) {                 /* Root-directory */
03041                 *tp++ = '/';
03042             } else {                        /* Sub-directroy */
03043                 do      /* Add stacked path str */
03044                     *tp++ = buff[i++];
03045                 while (i < len);
03046             }
03047         }
03048         *tp = 0;
03049         FREE_BUF();
03050     }
03051 
03052     LEAVE_FF(dj.fs, res);
03053 }
03054 #endif /* _FS_RPATH >= 2 */
03055 #endif /* _FS_RPATH >= 1 */
03056 
03057 
03058 
03059 #if _FS_MINIMIZE <= 2
03060 /*-----------------------------------------------------------------------*/
03061 /* Seek File R/W Pointer                                                 */
03062 /*-----------------------------------------------------------------------*/
03063 
03064 FRESULT f_lseek (
03065     FIL* fp,        /* Pointer to the file object */
03066     DWORD ofs       /* File pointer from top of file */
03067 )
03068 {
03069     FRESULT res;
03070     DWORD clst, bcs, nsect, ifptr;
03071 #if _USE_FASTSEEK
03072     DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
03073 #endif
03074 
03075 
03076     res = validate(fp);                 /* Check validity of the object */
03077     if (res != FR_OK) LEAVE_FF(fp->fs, res);
03078     if (fp->err)                        /* Check error */
03079         LEAVE_FF(fp->fs, (FRESULT)fp->err);
03080 
03081 #if _USE_FASTSEEK
03082     if (fp->cltbl) {    /* Fast seek */
03083         if (ofs == CREATE_LINKMAP) {    /* Create CLMT */
03084             tbl = fp->cltbl;
03085             tlen = *tbl++; ulen = 2;    /* Given table size and required table size */
03086             cl = fp->sclust;            /* Top of the chain */
03087             if (cl) {
03088                 do {
03089                     /* Get a fragment */
03090                     tcl = cl; ncl = 0; ulen += 2;   /* Top, length and used items */
03091                     do {
03092                         pcl = cl; ncl++;
03093                         cl = get_fat(fp->fs, cl);
03094                         if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
03095                         if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
03096                     } while (cl == pcl + 1);
03097                     if (ulen <= tlen) {     /* Store the length and top of the fragment */
03098                         *tbl++ = ncl; *tbl++ = tcl;
03099                     }
03100                 } while (cl < fp->fs->n_fatent);    /* Repeat until end of chain */
03101             }
03102             *fp->cltbl = ulen;  /* Number of items used */
03103             if (ulen <= tlen)
03104                 *tbl = 0;       /* Terminate table */
03105             else
03106                 res = FR_NOT_ENOUGH_CORE;   /* Given table size is smaller than required */
03107 
03108         } else {                        /* Fast seek */
03109             if (ofs > fp->fsize)        /* Clip offset at the file size */
03110                 ofs = fp->fsize;
03111             fp->fptr = ofs;             /* Set file pointer */
03112             if (ofs) {
03113                 fp->clust = clmt_clust(fp, ofs - 1);
03114                 dsc = clust2sect(fp->fs, fp->clust);
03115                 if (!dsc) ABORT(fp->fs, FR_INT_ERR);
03116                 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
03117                 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) {    /* Refill sector cache if needed */
03118 #if !_FS_TINY
03119 #if !_FS_READONLY
03120                     if (fp->flag & FA__DIRTY) {     /* Write-back dirty sector cache */
03121                         if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
03122                             ABORT(fp->fs, FR_DISK_ERR);
03123                         fp->flag &= ~FA__DIRTY;
03124                     }
03125 #endif
03126                     if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK)  /* Load current sector */
03127                         ABORT(fp->fs, FR_DISK_ERR);
03128 #endif
03129                     fp->dsect = dsc;
03130                 }
03131             }
03132         }
03133     } else
03134 #endif
03135 
03136     /* Normal Seek */
03137     {
03138         if (ofs > fp->fsize                 /* In read-only mode, clip offset with the file size */
03139 #if !_FS_READONLY
03140              && !(fp->flag & FA_WRITE)
03141 #endif
03142             ) ofs = fp->fsize;
03143 
03144         ifptr = fp->fptr;
03145         fp->fptr = nsect = 0;
03146         if (ofs) {
03147             bcs = (DWORD)fp->fs->csize * SS(fp->fs);    /* Cluster size (byte) */
03148             if (ifptr > 0 &&
03149                 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
03150                 fp->fptr = (ifptr - 1) & ~(bcs - 1);    /* start from the current cluster */
03151                 ofs -= fp->fptr;
03152                 clst = fp->clust;
03153             } else {                                    /* When seek to back cluster, */
03154                 clst = fp->sclust;                      /* start from the first cluster */
03155 #if !_FS_READONLY
03156                 if (clst == 0) {                        /* If no cluster chain, create a new chain */
03157                     clst = create_chain(fp->fs, 0);
03158                     if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
03159                     if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
03160                     fp->sclust = clst;
03161                 }
03162 #endif
03163                 fp->clust = clst;
03164             }
03165             if (clst != 0) {
03166                 while (ofs > bcs) {                     /* Cluster following loop */
03167 #if !_FS_READONLY
03168                     if (fp->flag & FA_WRITE) {          /* Check if in write mode or not */
03169                         clst = create_chain(fp->fs, clst);  /* Force stretch if in write mode */
03170                         if (clst == 0) {                /* When disk gets full, clip file size */
03171                             ofs = bcs; break;
03172                         }
03173                     } else
03174 #endif
03175                         clst = get_fat(fp->fs, clst);   /* Follow cluster chain if not in write mode */
03176                     if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
03177                     if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
03178                     fp->clust = clst;
03179                     fp->fptr += bcs;
03180                     ofs -= bcs;
03181                 }
03182                 fp->fptr += ofs;
03183                 if (ofs % SS(fp->fs)) {
03184                     nsect = clust2sect(fp->fs, clst);   /* Current sector */
03185                     if (!nsect) ABORT(fp->fs, FR_INT_ERR);
03186                     nsect += ofs / SS(fp->fs);
03187                 }
03188             }
03189         }
03190         if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) {  /* Fill sector cache if needed */
03191 #if !_FS_TINY
03192 #if !_FS_READONLY
03193             if (fp->flag & FA__DIRTY) {         /* Write-back dirty sector cache */
03194                 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
03195                     ABORT(fp->fs, FR_DISK_ERR);
03196                 fp->flag &= ~FA__DIRTY;
03197             }
03198 #endif
03199             if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK)    /* Fill sector cache */
03200                 ABORT(fp->fs, FR_DISK_ERR);
03201 #endif
03202             fp->dsect = nsect;
03203         }
03204 #if !_FS_READONLY
03205         if (fp->fptr > fp->fsize) {         /* Set file change flag if the file size is extended */
03206             fp->fsize = fp->fptr;
03207             fp->flag |= FA__WRITTEN;
03208         }
03209 #endif
03210     }
03211 
03212     LEAVE_FF(fp->fs, res);
03213 }
03214 
03215 
03216 
03217 #if _FS_MINIMIZE <= 1
03218 /*-----------------------------------------------------------------------*/
03219 /* Create a Directory Object                                             */
03220 /*-----------------------------------------------------------------------*/
03221 
03222 FRESULT f_opendir (
03223     FATFS_DIR* dp,          /* Pointer to directory object to create */
03224     const TCHAR* path   /* Pointer to the directory path */
03225 )
03226 {
03227     FRESULT res;
03228     FATFS* fs;
03229     DEFINE_NAMEBUF;
03230 
03231 
03232     if (!dp) return FR_INVALID_OBJECT;
03233 
03234     /* Get logical drive number */
03235     res = find_volume(&fs, &path, 0);
03236     if (res == FR_OK) {
03237         dp->fs = fs;
03238         INIT_BUF(*dp);
03239         res = follow_path(dp, path);            /* Follow the path to the directory */
03240         FREE_BUF();
03241         if (res == FR_OK) {                     /* Follow completed */
03242             if (dp->dir) {                      /* It is not the origin directory itself */
03243                 if (dp->dir[DIR_Attr] & AM_DIR) /* The object is a sub directory */
03244                     dp->sclust = ld_clust(fs, dp->dir);
03245                 else                            /* The object is a file */
03246                     res = FR_NO_PATH;
03247             }
03248             if (res == FR_OK) {
03249                 dp->id = fs->id;
03250                 res = dir_sdi(dp, 0);           /* Rewind directory */
03251 #if _FS_LOCK
03252                 if (res == FR_OK) {
03253                     if (dp->sclust) {
03254                         dp->lockid = inc_lock(dp, 0);   /* Lock the sub directory */
03255                         if (!dp->lockid)
03256                             res = FR_TOO_MANY_OPEN_FILES;
03257                     } else {
03258                         dp->lockid = 0; /* Root directory need not to be locked */
03259                     }
03260                 }
03261 #endif
03262             }
03263         }
03264         if (res == FR_NO_FILE) res = FR_NO_PATH;
03265     }
03266     if (res != FR_OK) dp->fs = 0;       /* Invalidate the directory object if function faild */
03267 
03268     LEAVE_FF(fs, res);
03269 }
03270 
03271 
03272 
03273 
03274 /*-----------------------------------------------------------------------*/
03275 /* Close Directory                                                       */
03276 /*-----------------------------------------------------------------------*/
03277 
03278 FRESULT f_closedir (
03279     FATFS_DIR *dp       /* Pointer to the directory object to be closed */
03280 )
03281 {
03282     FRESULT res;
03283 
03284 
03285     res = validate(dp);
03286     if (res == FR_OK) {
03287 #if _FS_REENTRANT
03288         FATFS *fs = dp->fs;
03289 #endif
03290 #if _FS_LOCK
03291         if (dp->lockid)             /* Decrement sub-directory open counter */
03292             res = dec_lock(dp->lockid);
03293         if (res == FR_OK)
03294 #endif
03295             dp->fs = 0;             /* Invalidate directory object */
03296 #if _FS_REENTRANT
03297         unlock_fs(fs, FR_OK);       /* Unlock volume */
03298 #endif
03299     }
03300     return res;
03301 }
03302 
03303 
03304 
03305 
03306 /*-----------------------------------------------------------------------*/
03307 /* Read Directory Entries in Sequence                                    */
03308 /*-----------------------------------------------------------------------*/
03309 
03310 FRESULT f_readdir (
03311     FATFS_DIR* dp,          /* Pointer to the open directory object */
03312     FILINFO* fno        /* Pointer to file information to return */
03313 )
03314 {
03315     FRESULT res;
03316     DEFINE_NAMEBUF;
03317 
03318 
03319     res = validate(dp);                     /* Check validity of the object */
03320     if (res == FR_OK) {
03321         if (!fno) {
03322             res = dir_sdi(dp, 0);           /* Rewind the directory object */
03323         } else {
03324             INIT_BUF(*dp);
03325             res = dir_read(dp, 0);          /* Read an item */
03326             if (res == FR_NO_FILE) {        /* Reached end of directory */
03327                 dp->sect = 0;
03328                 res = FR_OK;
03329             }
03330             if (res == FR_OK) {             /* A valid entry is found */
03331                 get_fileinfo(dp, fno);      /* Get the object information */
03332                 res = dir_next(dp, 0);      /* Increment index for next */
03333                 if (res == FR_NO_FILE) {
03334                     dp->sect = 0;
03335                     res = FR_OK;
03336                 }
03337             }
03338             FREE_BUF();
03339         }
03340     }
03341 
03342     LEAVE_FF(dp->fs, res);
03343 }
03344 
03345 
03346 
03347 #if _USE_FIND
03348 /*-----------------------------------------------------------------------*/
03349 /* Find next file                                                        */
03350 /*-----------------------------------------------------------------------*/
03351 
03352 FRESULT f_findnext (
03353     FATFS_DIR* dp,      /* Pointer to the open directory object */
03354     FILINFO* fno    /* Pointer to the file information structure */
03355 )
03356 {
03357     FRESULT res;
03358 
03359 
03360     for (;;) {
03361         res = f_readdir(dp, fno);       /* Get a directory item */
03362         if (res != FR_OK || !fno || !fno->fname[0]) break;  /* Terminate if any error or end of directory */
03363 #if _USE_LFN
03364         if (fno->lfname && pattern_matching(dp->pat, fno->lfname, 0, 0)) break; /* Test for LFN if exist */
03365 #endif
03366         if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for SFN */
03367     }
03368     return res;
03369 
03370 }
03371 
03372 
03373 
03374 /*-----------------------------------------------------------------------*/
03375 /* Find first file                                                       */
03376 /*-----------------------------------------------------------------------*/
03377 
03378 FRESULT f_findfirst (
03379     FATFS_DIR* dp,              /* Pointer to the blank directory object */
03380     FILINFO* fno,           /* Pointer to the file information structure */
03381     const TCHAR* path,      /* Pointer to the directory to open */
03382     const TCHAR* pattern    /* Pointer to the matching pattern */
03383 )
03384 {
03385     FRESULT res;
03386 
03387 
03388     dp->pat = pattern;      /* Save pointer to pattern string */
03389     res = f_opendir(dp, path);      /* Open the target directory */
03390     if (res == FR_OK)
03391         res = f_findnext(dp, fno);  /* Find the first item */
03392     return res;
03393 }
03394 
03395 #endif  /* _USE_FIND */
03396 
03397 
03398 
03399 #if _FS_MINIMIZE == 0
03400 /*-----------------------------------------------------------------------*/
03401 /* Get File Status                                                       */
03402 /*-----------------------------------------------------------------------*/
03403 
03404 FRESULT f_stat (
03405     const TCHAR* path,  /* Pointer to the file path */
03406     FILINFO* fno        /* Pointer to file information to return */
03407 )
03408 {
03409     FRESULT res;
03410     FATFS_DIR dj;
03411     DEFINE_NAMEBUF;
03412 
03413 
03414     /* Get logical drive number */
03415     res = find_volume(&dj.fs, &path, 0);
03416     if (res == FR_OK) {
03417         INIT_BUF(dj);
03418         res = follow_path(&dj, path);   /* Follow the file path */
03419         if (res == FR_OK) {             /* Follow completed */
03420             if (dj.dir) {       /* Found an object */
03421                 if (fno) get_fileinfo(&dj, fno);
03422             } else {            /* It is root directory */
03423                 res = FR_INVALID_NAME;
03424             }
03425         }
03426         FREE_BUF();
03427     }
03428 
03429     LEAVE_FF(dj.fs, res);
03430 }
03431 
03432 
03433 
03434 #if !_FS_READONLY
03435 /*-----------------------------------------------------------------------*/
03436 /* Get Number of Free Clusters                                           */
03437 /*-----------------------------------------------------------------------*/
03438 
03439 FRESULT f_getfree (
03440     const TCHAR* path,  /* Path name of the logical drive number */
03441     DWORD* nclst,       /* Pointer to a variable to return number of free clusters */
03442     FATFS** fatfs       /* Pointer to return pointer to corresponding file system object */
03443 )
03444 {
03445     FRESULT res;
03446     FATFS *fs;
03447     DWORD nfree, clst, sect, stat;
03448     UINT i;
03449     BYTE fat, *p;
03450 
03451 
03452     /* Get logical drive number */
03453     res = find_volume(fatfs, &path, 0);
03454     fs = *fatfs;
03455     if (res == FR_OK) {
03456         /* If free_clust is valid, return it without full cluster scan */
03457         if (fs->free_clust <= fs->n_fatent - 2) {
03458             *nclst = fs->free_clust;
03459         } else {
03460             /* Get number of free clusters */
03461             fat = fs->fs_type;
03462             nfree = 0;
03463             if (fat == FS_FAT12) {  /* Sector unalighed entries: Search FAT via regular routine. */
03464                 clst = 2;
03465                 do {
03466                     stat = get_fat(fs, clst);
03467                     if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
03468                     if (stat == 1) { res = FR_INT_ERR; break; }
03469                     if (stat == 0) nfree++;
03470                 } while (++clst < fs->n_fatent);
03471             } else {                /* Sector alighed entries: Accelerate the FAT search. */
03472                 clst = fs->n_fatent; sect = fs->fatbase;
03473                 i = 0; p = 0;
03474                 do {
03475                     if (!i) {
03476                         res = move_window(fs, sect++);
03477                         if (res != FR_OK) break;
03478                         p = fs->win;
03479                         i = SS(fs);
03480                     }
03481                     if (fat == FS_FAT16) {
03482                         if (LD_WORD(p) == 0) nfree++;
03483                         p += 2; i -= 2;
03484                     } else {
03485                         if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) nfree++;
03486                         p += 4; i -= 4;
03487                     }
03488                 } while (--clst);
03489             }
03490             fs->free_clust = nfree; /* free_clust is valid */
03491             fs->fsi_flag |= 1;      /* FSInfo is to be updated */
03492             *nclst = nfree;         /* Return the free clusters */
03493         }
03494     }
03495     LEAVE_FF(fs, res);
03496 }
03497 
03498 
03499 
03500 
03501 /*-----------------------------------------------------------------------*/
03502 /* Truncate File                                                         */
03503 /*-----------------------------------------------------------------------*/
03504 
03505 FRESULT f_truncate (
03506     FIL* fp     /* Pointer to the file object */
03507 )
03508 {
03509     FRESULT res;
03510     DWORD ncl;
03511 
03512 
03513     res = validate(fp);                     /* Check validity of the object */
03514     if (res == FR_OK) {
03515         if (fp->err) {                      /* Check error */
03516             res = (FRESULT)fp->err;
03517         } else {
03518             if (!(fp->flag & FA_WRITE))     /* Check access mode */
03519                 res = FR_DENIED;
03520         }
03521     }
03522     if (res == FR_OK) {
03523         if (fp->fsize > fp->fptr) {
03524             fp->fsize = fp->fptr;   /* Set file size to current R/W point */
03525             fp->flag |= FA__WRITTEN;
03526             if (fp->fptr == 0) {    /* When set file size to zero, remove entire cluster chain */
03527                 res = remove_chain(fp->fs, fp->sclust);
03528                 fp->sclust = 0;
03529             } else {                /* When truncate a part of the file, remove remaining clusters */
03530                 ncl = get_fat(fp->fs, fp->clust);
03531                 res = FR_OK;
03532                 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
03533                 if (ncl == 1) res = FR_INT_ERR;
03534                 if (res == FR_OK && ncl < fp->fs->n_fatent) {
03535                     res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF);
03536                     if (res == FR_OK) res = remove_chain(fp->fs, ncl);
03537                 }
03538             }
03539 #if !_FS_TINY
03540             if (res == FR_OK && (fp->flag & FA__DIRTY)) {
03541                 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
03542                     res = FR_DISK_ERR;
03543                 else
03544                     fp->flag &= ~FA__DIRTY;
03545             }
03546 #endif
03547         }
03548         if (res != FR_OK) fp->err = (FRESULT)res;
03549     }
03550 
03551     LEAVE_FF(fp->fs, res);
03552 }
03553 
03554 
03555 
03556 
03557 /*-----------------------------------------------------------------------*/
03558 /* Delete a File or Directory                                            */
03559 /*-----------------------------------------------------------------------*/
03560 
03561 FRESULT f_unlink (
03562     const TCHAR* path       /* Pointer to the file or directory path */
03563 )
03564 {
03565     FRESULT res;
03566     FATFS_DIR dj, sdj;
03567     BYTE *dir;
03568     DWORD dclst = 0;
03569     DEFINE_NAMEBUF;
03570 
03571 
03572     /* Get logical drive number */
03573     res = find_volume(&dj.fs, &path, 1);
03574     if (res == FR_OK) {
03575         INIT_BUF(dj);
03576         res = follow_path(&dj, path);       /* Follow the file path */
03577         if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
03578             res = FR_INVALID_NAME;          /* Cannot remove dot entry */
03579 #if _FS_LOCK
03580         if (res == FR_OK) res = chk_lock(&dj, 2);   /* Cannot remove open object */
03581 #endif
03582         if (res == FR_OK) {                 /* The object is accessible */
03583             dir = dj.dir;
03584             if (!dir) {
03585                 res = FR_INVALID_NAME;      /* Cannot remove the origin directory */
03586             } else {
03587                 if (dir[DIR_Attr] & AM_RDO)
03588                     res = FR_DENIED;        /* Cannot remove R/O object */
03589             }
03590             if (res == FR_OK) {
03591                 dclst = ld_clust(dj.fs, dir);
03592                 if (dclst && (dir[DIR_Attr] & AM_DIR)) {    /* Is it a sub-directory ? */
03593 #if _FS_RPATH
03594                     if (dclst == dj.fs->cdir) {             /* Is it the current directory? */
03595                         res = FR_DENIED;
03596                     } else
03597 #endif
03598                     {
03599                         mem_cpy(&sdj, &dj, sizeof (FATFS_DIR)); /* Open the sub-directory */
03600                         sdj.sclust = dclst;
03601                         res = dir_sdi(&sdj, 2);
03602                         if (res == FR_OK) {
03603                             res = dir_read(&sdj, 0);            /* Read an item (excluding dot entries) */
03604                             if (res == FR_OK) res = FR_DENIED;  /* Not empty? (cannot remove) */
03605                             if (res == FR_NO_FILE) res = FR_OK; /* Empty? (can remove) */
03606                         }
03607                     }
03608                 }
03609             }
03610             if (res == FR_OK) {
03611                 res = dir_remove(&dj);      /* Remove the directory entry */
03612                 if (res == FR_OK && dclst)  /* Remove the cluster chain if exist */
03613                     res = remove_chain(dj.fs, dclst);
03614                 if (res == FR_OK) res = sync_fs(dj.fs);
03615             }
03616         }
03617         FREE_BUF();
03618     }
03619 
03620     LEAVE_FF(dj.fs, res);
03621 }
03622 
03623 
03624 
03625 
03626 /*-----------------------------------------------------------------------*/
03627 /* Create a Directory                                                    */
03628 /*-----------------------------------------------------------------------*/
03629 
03630 FRESULT f_mkdir (
03631     const TCHAR* path       /* Pointer to the directory path */
03632 )
03633 {
03634     FRESULT res;
03635     FATFS_DIR dj;
03636     BYTE *dir, n;
03637     DWORD dsc, dcl, pcl, tm = GET_FATTIME();
03638     DEFINE_NAMEBUF;
03639 
03640 
03641     /* Get logical drive number */
03642     res = find_volume(&dj.fs, &path, 1);
03643     if (res == FR_OK) {
03644         INIT_BUF(dj);
03645         res = follow_path(&dj, path);           /* Follow the file path */
03646         if (res == FR_OK) res = FR_EXIST;       /* Any object with same name is already existing */
03647         if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT))
03648             res = FR_INVALID_NAME;
03649         if (res == FR_NO_FILE) {                /* Can create a new directory */
03650             dcl = create_chain(dj.fs, 0);       /* Allocate a cluster for the new directory table */
03651             res = FR_OK;
03652             if (dcl == 0) res = FR_DENIED;      /* No space to allocate a new cluster */
03653             if (dcl == 1) res = FR_INT_ERR;
03654             if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
03655             if (res == FR_OK)                   /* Flush FAT */
03656                 res = sync_window(dj.fs);
03657             if (res == FR_OK) {                 /* Initialize the new directory table */
03658                 dsc = clust2sect(dj.fs, dcl);
03659                 dir = dj.fs->win;
03660                 mem_set(dir, 0, SS(dj.fs));
03661                 mem_set(dir + DIR_Name, ' ', 11);   /* Create "." entry */
03662                 dir[DIR_Name] = '.';
03663                 dir[DIR_Attr] = AM_DIR;
03664                 ST_DWORD(dir + DIR_WrtTime, tm);
03665                 st_clust(dir, dcl);
03666                 mem_cpy(dir + SZ_DIRE, dir, SZ_DIRE);   /* Create ".." entry */
03667                 dir[SZ_DIRE + 1] = '.'; pcl = dj.sclust;
03668                 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
03669                     pcl = 0;
03670                 st_clust(dir + SZ_DIRE, pcl);
03671                 for (n = dj.fs->csize; n; n--) {    /* Write dot entries and clear following sectors */
03672                     dj.fs->winsect = dsc++;
03673                     dj.fs->wflag = 1;
03674                     res = sync_window(dj.fs);
03675                     if (res != FR_OK) break;
03676                     mem_set(dir, 0, SS(dj.fs));
03677                 }
03678             }
03679             if (res == FR_OK) res = dir_register(&dj);  /* Register the object to the directoy */
03680             if (res != FR_OK) {
03681                 remove_chain(dj.fs, dcl);           /* Could not register, remove cluster chain */
03682             } else {
03683                 dir = dj.dir;
03684                 dir[DIR_Attr] = AM_DIR;             /* Attribute */
03685                 ST_DWORD(dir + DIR_WrtTime, tm);    /* Created time */
03686                 st_clust(dir, dcl);                 /* Table start cluster */
03687                 dj.fs->wflag = 1;
03688                 res = sync_fs(dj.fs);
03689             }
03690         }
03691         FREE_BUF();
03692     }
03693 
03694     LEAVE_FF(dj.fs, res);
03695 }
03696 
03697 
03698 
03699 
03700 /*-----------------------------------------------------------------------*/
03701 /* Change Attribute                                                      */
03702 /*-----------------------------------------------------------------------*/
03703 
03704 FRESULT f_chmod (
03705     const TCHAR* path,  /* Pointer to the file path */
03706     BYTE attr,          /* Attribute bits */
03707     BYTE mask           /* Attribute mask to change */
03708 )
03709 {
03710     FRESULT res;
03711     FATFS_DIR dj;
03712     BYTE *dir;
03713     DEFINE_NAMEBUF;
03714 
03715 
03716     res = find_volume(&dj.fs, &path, 1);    /* Get logical drive number */
03717     if (res == FR_OK) {
03718         INIT_BUF(dj);
03719         res = follow_path(&dj, path);       /* Follow the file path */
03720         FREE_BUF();
03721         if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
03722             res = FR_INVALID_NAME;
03723         if (res == FR_OK) {
03724             dir = dj.dir;
03725             if (!dir) {                     /* Is it a root directory? */
03726                 res = FR_INVALID_NAME;
03727             } else {                        /* File or sub directory */
03728                 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC;    /* Valid attribute mask */
03729                 dir[DIR_Attr] = (attr & mask) | (dir[DIR_Attr] & (BYTE)~mask);  /* Apply attribute change */
03730                 dj.fs->wflag = 1;
03731                 res = sync_fs(dj.fs);
03732             }
03733         }
03734     }
03735 
03736     LEAVE_FF(dj.fs, res);
03737 }
03738 
03739 
03740 
03741 
03742 /*-----------------------------------------------------------------------*/
03743 /* Rename File/Directory                                                 */
03744 /*-----------------------------------------------------------------------*/
03745 
03746 FRESULT f_rename (
03747     const TCHAR* path_old,  /* Pointer to the object to be renamed */
03748     const TCHAR* path_new   /* Pointer to the new name */
03749 )
03750 {
03751     FRESULT res;
03752     FATFS_DIR djo, djn;
03753     BYTE buf[21], *dir;
03754     DWORD dw;
03755     DEFINE_NAMEBUF;
03756 
03757 
03758     /* Get logical drive number of the source object */
03759     res = find_volume(&djo.fs, &path_old, 1);
03760     if (res == FR_OK) {
03761         djn.fs = djo.fs;
03762         INIT_BUF(djo);
03763         res = follow_path(&djo, path_old);      /* Check old object */
03764         if (_FS_RPATH && res == FR_OK && (djo.fn[NSFLAG] & NS_DOT))
03765             res = FR_INVALID_NAME;
03766 #if _FS_LOCK
03767         if (res == FR_OK) res = chk_lock(&djo, 2);
03768 #endif
03769         if (res == FR_OK) {                     /* Old object is found */
03770             if (!djo.dir) {                     /* Is root dir? */
03771                 res = FR_NO_FILE;
03772             } else {
03773                 mem_cpy(buf, djo.dir + DIR_Attr, 21);   /* Save information about object except name */
03774                 mem_cpy(&djn, &djo, sizeof (FATFS_DIR));        /* Duplicate the directory object */
03775                 if (get_ldnumber(&path_new) >= 0)       /* Snip drive number off and ignore it */
03776                     res = follow_path(&djn, path_new);  /* and make sure if new object name is not conflicting */
03777                 else
03778                     res = FR_INVALID_DRIVE;
03779                 if (res == FR_OK) res = FR_EXIST;       /* The new object name is already existing */
03780                 if (res == FR_NO_FILE) {                /* It is a valid path and no name collision */
03781                     res = dir_register(&djn);           /* Register the new entry */
03782                     if (res == FR_OK) {
03783 /* Start of critical section where any interruption can cause a cross-link */
03784                         dir = djn.dir;                  /* Copy information about object except name */
03785                         mem_cpy(dir + 13, buf + 2, 19);
03786                         dir[DIR_Attr] = buf[0] | AM_ARC;
03787                         djo.fs->wflag = 1;
03788                         if ((dir[DIR_Attr] & AM_DIR) && djo.sclust != djn.sclust) { /* Update .. entry in the sub-directory if needed */
03789                             dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
03790                             if (!dw) {
03791                                 res = FR_INT_ERR;
03792                             } else {
03793                                 res = move_window(djo.fs, dw);
03794                                 dir = djo.fs->win + SZ_DIRE * 1;    /* Ptr to .. entry */
03795                                 if (res == FR_OK && dir[1] == '.') {
03796                                     st_clust(dir, djn.sclust);
03797                                     djo.fs->wflag = 1;
03798                                 }
03799                             }
03800                         }
03801                         if (res == FR_OK) {
03802                             res = dir_remove(&djo);     /* Remove old entry */
03803                             if (res == FR_OK)
03804                                 res = sync_fs(djo.fs);
03805                         }
03806 /* End of critical section */
03807                     }
03808                 }
03809             }
03810         }
03811         FREE_BUF();
03812     }
03813 
03814     LEAVE_FF(djo.fs, res);
03815 }
03816 
03817 
03818 
03819 
03820 /*-----------------------------------------------------------------------*/
03821 /* Change Timestamp                                                      */
03822 /*-----------------------------------------------------------------------*/
03823 
03824 FRESULT f_utime (
03825     const TCHAR* path,  /* Pointer to the file/directory name */
03826     const FILINFO* fno  /* Pointer to the time stamp to be set */
03827 )
03828 {
03829     FRESULT res;
03830     FATFS_DIR dj;
03831     BYTE *dir;
03832     DEFINE_NAMEBUF;
03833 
03834 
03835     /* Get logical drive number */
03836     res = find_volume(&dj.fs, &path, 1);
03837     if (res == FR_OK) {
03838         INIT_BUF(dj);
03839         res = follow_path(&dj, path);   /* Follow the file path */
03840         FREE_BUF();
03841         if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
03842             res = FR_INVALID_NAME;
03843         if (res == FR_OK) {
03844             dir = dj.dir;
03845             if (!dir) {                 /* Root directory */
03846                 res = FR_INVALID_NAME;
03847             } else {                    /* File or sub-directory */
03848                 ST_WORD(dir + DIR_WrtTime, fno->ftime);
03849                 ST_WORD(dir + DIR_WrtDate, fno->fdate);
03850                 dj.fs->wflag = 1;
03851                 res = sync_fs(dj.fs);
03852             }
03853         }
03854     }
03855 
03856     LEAVE_FF(dj.fs, res);
03857 }
03858 
03859 #endif /* !_FS_READONLY */
03860 #endif /* _FS_MINIMIZE == 0 */
03861 #endif /* _FS_MINIMIZE <= 1 */
03862 #endif /* _FS_MINIMIZE <= 2 */
03863 
03864 
03865 
03866 
03867 #if _USE_LABEL
03868 /*-----------------------------------------------------------------------*/
03869 /* Get volume label                                                      */
03870 /*-----------------------------------------------------------------------*/
03871 
03872 FRESULT f_getlabel (
03873     const TCHAR* path,  /* Path name of the logical drive number */
03874     TCHAR* label,       /* Pointer to a buffer to return the volume label */
03875     DWORD* vsn          /* Pointer to a variable to return the volume serial number */
03876 )
03877 {
03878     FRESULT res;
03879     FATFS_DIR dj;
03880     UINT i, j;
03881 #if _USE_LFN && _LFN_UNICODE
03882     WCHAR w;
03883 #endif
03884 
03885 
03886     /* Get logical drive number */
03887     res = find_volume(&dj.fs, &path, 0);
03888 
03889     /* Get volume label */
03890     if (res == FR_OK && label) {
03891         dj.sclust = 0;                  /* Open root directory */
03892         res = dir_sdi(&dj, 0);
03893         if (res == FR_OK) {
03894             res = dir_read(&dj, 1);     /* Get an entry with AM_VOL */
03895             if (res == FR_OK) {         /* A volume label is exist */
03896 #if _USE_LFN && _LFN_UNICODE
03897                 i = j = 0;
03898                 do {
03899                     w = (i < 11) ? dj.dir[i++] : ' ';
03900                     if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i]))
03901                         w = w << 8 | dj.dir[i++];
03902                     label[j++] = ff_convert(w, 1);  /* OEM -> Unicode */
03903                 } while (j < 11);
03904 #else
03905                 mem_cpy(label, dj.dir, 11);
03906 #endif
03907                 j = 11;
03908                 do {
03909                     label[j] = 0;
03910                     if (!j) break;
03911                 } while (label[--j] == ' ');
03912             }
03913             if (res == FR_NO_FILE) {    /* No label, return nul string */
03914                 label[0] = 0;
03915                 res = FR_OK;
03916             }
03917         }
03918     }
03919 
03920     /* Get volume serial number */
03921     if (res == FR_OK && vsn) {
03922         res = move_window(dj.fs, dj.fs->volbase);
03923         if (res == FR_OK) {
03924             i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID;
03925             *vsn = LD_DWORD(&dj.fs->win[i]);
03926         }
03927     }
03928 
03929     LEAVE_FF(dj.fs, res);
03930 }
03931 
03932 
03933 
03934 #if !_FS_READONLY
03935 /*-----------------------------------------------------------------------*/
03936 /* Set volume label                                                      */
03937 /*-----------------------------------------------------------------------*/
03938 
03939 FRESULT f_setlabel (
03940     const TCHAR* label  /* Pointer to the volume label to set */
03941 )
03942 {
03943     FRESULT res;
03944     FATFS_DIR dj;
03945     BYTE vn[11];
03946     UINT i, j, sl;
03947     WCHAR w;
03948     DWORD tm;
03949 
03950 
03951     /* Get logical drive number */
03952     res = find_volume(&dj.fs, &label, 1);
03953     if (res) LEAVE_FF(dj.fs, res);
03954 
03955     /* Create a volume label in directory form */
03956     vn[0] = 0;
03957     for (sl = 0; label[sl]; sl++) ;             /* Get name length */
03958     for ( ; sl && label[sl - 1] == ' '; sl--) ; /* Remove trailing spaces */
03959     if (sl) {   /* Create volume label in directory form */
03960         i = j = 0;
03961         do {
03962 #if _USE_LFN && _LFN_UNICODE
03963             w = ff_convert(ff_wtoupper(label[i++]), 0);
03964 #else
03965             w = (BYTE)label[i++];
03966             if (IsDBCS1(w))
03967                 w = (j < 10 && i < sl && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;
03968 #if _USE_LFN
03969             w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0);
03970 #else
03971             if (IsLower(w)) w -= 0x20;          /* To upper ASCII characters */
03972 #ifdef _EXCVT
03973             if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */
03974 #else
03975             if (!_DF1S && w >= 0x80) w = 0;     /* Reject extended characters (ASCII cfg) */
03976 #endif
03977 #endif
03978 #endif
03979             if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid characters for volume label */
03980                 LEAVE_FF(dj.fs, FR_INVALID_NAME);
03981             if (w >= 0x100) vn[j++] = (BYTE)(w >> 8);
03982             vn[j++] = (BYTE)w;
03983         } while (i < sl);
03984         while (j < 11) vn[j++] = ' ';   /* Fill remaining name field */
03985         if (vn[0] == DDEM) LEAVE_FF(dj.fs, FR_INVALID_NAME);    /* Reject illegal name (heading DDEM) */
03986     }
03987 
03988     /* Set volume label */
03989     dj.sclust = 0;                  /* Open root directory */
03990     res = dir_sdi(&dj, 0);
03991     if (res == FR_OK) {
03992         res = dir_read(&dj, 1);     /* Get an entry with AM_VOL */
03993         if (res == FR_OK) {         /* A volume label is found */
03994             if (vn[0]) {
03995                 mem_cpy(dj.dir, vn, 11);    /* Change the volume label name */
03996                 tm = GET_FATTIME();
03997                 ST_DWORD(dj.dir + DIR_WrtTime, tm);
03998             } else {
03999                 dj.dir[0] = DDEM;           /* Remove the volume label */
04000             }
04001             dj.fs->wflag = 1;
04002             res = sync_fs(dj.fs);
04003         } else {                    /* No volume label is found or error */
04004             if (res == FR_NO_FILE) {
04005                 res = FR_OK;
04006                 if (vn[0]) {                /* Create volume label as new */
04007                     res = dir_alloc(&dj, 1);    /* Allocate an entry for volume label */
04008                     if (res == FR_OK) {
04009                         mem_set(dj.dir, 0, SZ_DIRE);    /* Set volume label */
04010                         mem_cpy(dj.dir, vn, 11);
04011                         dj.dir[DIR_Attr] = AM_VOL;
04012                         tm = GET_FATTIME();
04013                         ST_DWORD(dj.dir + DIR_WrtTime, tm);
04014                         dj.fs->wflag = 1;
04015                         res = sync_fs(dj.fs);
04016                     }
04017                 }
04018             }
04019         }
04020     }
04021 
04022     LEAVE_FF(dj.fs, res);
04023 }
04024 
04025 #endif /* !_FS_READONLY */
04026 #endif /* _USE_LABEL */
04027 
04028 
04029 
04030 /*-----------------------------------------------------------------------*/
04031 /* Forward data to the stream directly (available on only tiny cfg)      */
04032 /*-----------------------------------------------------------------------*/
04033 #if _USE_FORWARD && _FS_TINY
04034 
04035 FRESULT f_forward (
04036     FIL* fp,                        /* Pointer to the file object */
04037     UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
04038     UINT btf,                       /* Number of bytes to forward */
04039     UINT* bf                        /* Pointer to number of bytes forwarded */
04040 )
04041 {
04042     FRESULT res;
04043     DWORD remain, clst, sect;
04044     UINT rcnt;
04045     BYTE csect;
04046 
04047 
04048     *bf = 0;    /* Clear transfer byte counter */
04049 
04050     res = validate(fp);                             /* Check validity of the object */
04051     if (res != FR_OK) LEAVE_FF(fp->fs, res);
04052     if (fp->err)                                    /* Check error */
04053         LEAVE_FF(fp->fs, (FRESULT)fp->err);
04054     if (!(fp->flag & FA_READ))                      /* Check access mode */
04055         LEAVE_FF(fp->fs, FR_DENIED);
04056 
04057     remain = fp->fsize - fp->fptr;
04058     if (btf > remain) btf = (UINT)remain;           /* Truncate btf by remaining bytes */
04059 
04060     for ( ;  btf && (*func)(0, 0);                  /* Repeat until all data transferred or stream becomes busy */
04061         fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
04062         csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1));    /* Sector offset in the cluster */
04063         if ((fp->fptr % SS(fp->fs)) == 0) {         /* On the sector boundary? */
04064             if (!csect) {                           /* On the cluster boundary? */
04065                 clst = (fp->fptr == 0) ?            /* On the top of the file? */
04066                     fp->sclust : get_fat(fp->fs, fp->clust);
04067                 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
04068                 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
04069                 fp->clust = clst;                   /* Update current cluster */
04070             }
04071         }
04072         sect = clust2sect(fp->fs, fp->clust);       /* Get current data sector */
04073         if (!sect) ABORT(fp->fs, FR_INT_ERR);
04074         sect += csect;
04075         if (move_window(fp->fs, sect) != FR_OK)     /* Move sector window */
04076             ABORT(fp->fs, FR_DISK_ERR);
04077         fp->dsect = sect;
04078         rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs));  /* Forward data from sector window */
04079         if (rcnt > btf) rcnt = btf;
04080         rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
04081         if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
04082     }
04083 
04084     LEAVE_FF(fp->fs, FR_OK);
04085 }
04086 #endif /* _USE_FORWARD */
04087 
04088 
04089 
04090 #if _USE_MKFS && !_FS_READONLY
04091 /*-----------------------------------------------------------------------*/
04092 /* Create file system on the logical drive                               */
04093 /*-----------------------------------------------------------------------*/
04094 #define N_ROOTDIR   512     /* Number of root directory entries for FAT12/16 */
04095 #define N_FATS      1       /* Number of FATs (1 or 2) */
04096 
04097 
04098 FRESULT f_mkfs (
04099     const TCHAR* path,  /* Logical drive number */
04100     BYTE sfd,           /* Partitioning rule 0:FDISK, 1:SFD */
04101     UINT au             /* Size of allocation unit in unit of byte or sector */
04102 )
04103 {
04104     static const WORD vst[] = { 1024,   512,  256,  128,   64,    32,   16,    8,    4,    2,   0};
04105     static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
04106     int vol;
04107     BYTE fmt, md, sys, *tbl, pdrv, part;
04108     DWORD n_clst, vs, n, wsect;
04109     UINT i;
04110     DWORD b_vol, b_fat, b_dir, b_data;  /* LBA */
04111     DWORD n_vol, n_rsv, n_fat, n_dir;   /* Size */
04112     FATFS *fs;
04113     DSTATUS stat;
04114 #if _USE_TRIM
04115     DWORD eb[2];
04116 #endif
04117 
04118 
04119     /* Check mounted drive and clear work area */
04120     if (sfd > 1) return FR_INVALID_PARAMETER;
04121     vol = get_ldnumber(&path);
04122     if (vol < 0) return FR_INVALID_DRIVE;
04123     fs = FatFs[vol];
04124     if (!fs) return FR_NOT_ENABLED;
04125     fs->fs_type = 0;
04126     pdrv = LD2PD(vol);  /* Physical drive */
04127     part = LD2PT(vol);  /* Partition (0:auto detect, 1-4:get from partition table)*/
04128 
04129     /* Get disk statics */
04130     stat = disk_initialize(pdrv);
04131     if (stat & STA_NOINIT) return FR_NOT_READY;
04132     if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
04133 #if _MAX_SS != _MIN_SS      /* Get disk sector size */
04134     if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS || SS(fs) < _MIN_SS)
04135         return FR_DISK_ERR;
04136 #endif
04137 #if _FS_HEAPBUF
04138     if (!fs->win) {
04139         fs->win = (BYTE*)ff_memalloc(SS(fs));   /* Allocate buffer to back window if necessary */
04140         if (!fs->win)
04141             return FR_NOT_ENOUGH_CORE;
04142     }
04143 #endif
04144     if (_MULTI_PARTITION && part) {
04145         /* Get partition information from partition table in the MBR */
04146         if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
04147         if (LD_WORD(fs->win + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
04148         tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
04149         if (!tbl[4]) return FR_MKFS_ABORTED;    /* No partition? */
04150         b_vol = LD_DWORD(tbl + 8);  /* Volume start sector */
04151         n_vol = LD_DWORD(tbl + 12); /* Volume size */
04152     } else {
04153         /* Create a partition in this function */
04154         if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < ((sfd) ? 64 : 128))
04155             return FR_DISK_ERR;
04156         b_vol = (sfd) ? 0 : 63;     /* Volume start sector */
04157         n_vol -= b_vol;             /* Volume size */
04158     }
04159 
04160     if (au & (au - 1)) au = 0;
04161     if (!au) {                      /* AU auto selection */
04162         vs = n_vol / (2000 / (SS(fs) / 512));
04163         for (i = 0; vs < vst[i]; i++) ;
04164         au = cst[i];
04165     }
04166     if (au >= _MIN_SS) au /= SS(fs);    /* Number of sectors per cluster */
04167     if (!au) au = 1;
04168     if (au > 128) au = 128;
04169 
04170     /* Pre-compute number of clusters and FAT sub-type */
04171     n_clst = n_vol / au;
04172     fmt = FS_FAT12;
04173     if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
04174     if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
04175 
04176     /* Determine offset and size of FAT structure */
04177     if (fmt == FS_FAT32) {
04178         n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
04179         n_rsv = 32;
04180         n_dir = 0;
04181     } else {
04182         n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
04183         n_fat = (n_fat + SS(fs) - 1) / SS(fs);
04184         n_rsv = 1;
04185         n_dir = (DWORD)N_ROOTDIR * SZ_DIRE / SS(fs);
04186     }
04187     b_fat = b_vol + n_rsv;              /* FAT area start sector */
04188     b_dir = b_fat + n_fat * N_FATS;     /* Directory area start sector */
04189     b_data = b_dir + n_dir;             /* Data area start sector */
04190     if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED;    /* Too small volume */
04191 
04192     /* Align data start sector to erase block boundary (for flash memory media) */
04193     if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1;
04194     n = (b_data + n - 1) & ~(n - 1);    /* Next nearest erase block from current data start */
04195     n = (n - b_data) / N_FATS;
04196     if (fmt == FS_FAT32) {      /* FAT32: Move FAT offset */
04197         n_rsv += n;
04198         b_fat += n;
04199     } else {                    /* FAT12/16: Expand FAT size */
04200         n_fat += n;
04201     }
04202 
04203     /* Determine number of clusters and final check of validity of the FAT sub-type */
04204     n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
04205     if (   (fmt == FS_FAT16 && n_clst < MIN_FAT16)
04206         || (fmt == FS_FAT32 && n_clst < MIN_FAT32))
04207         return FR_MKFS_ABORTED;
04208 
04209     /* Determine system ID in the partition table */
04210     if (fmt == FS_FAT32) {
04211         sys = 0x0C;     /* FAT32X */
04212     } else {
04213         if (fmt == FS_FAT12 && n_vol < 0x10000) {
04214             sys = 0x01; /* FAT12(<65536) */
04215         } else {
04216             sys = (n_vol < 0x10000) ? 0x04 : 0x06;  /* FAT16(<65536) : FAT12/16(>=65536) */
04217         }
04218     }
04219 
04220     if (_MULTI_PARTITION && part) {
04221         /* Update system ID in the partition table */
04222         tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
04223         tbl[4] = sys;
04224         if (disk_write(pdrv, fs->win, 0, 1) != RES_OK)  /* Write it to teh MBR */
04225             return FR_DISK_ERR;
04226         md = 0xF8;
04227     } else {
04228         if (sfd) {  /* No partition table (SFD) */
04229             md = 0xF0;
04230         } else {    /* Create partition table (FDISK) */
04231             mem_set(fs->win, 0, SS(fs));
04232             tbl = fs->win + MBR_Table;  /* Create partition table for single partition in the drive */
04233             tbl[1] = 1;                     /* Partition start head */
04234             tbl[2] = 1;                     /* Partition start sector */
04235             tbl[3] = 0;                     /* Partition start cylinder */
04236             tbl[4] = sys;                   /* System type */
04237             tbl[5] = 254;                   /* Partition end head */
04238             n = (b_vol + n_vol) / 63 / 255;
04239             tbl[6] = (BYTE)(n >> 2 | 63);   /* Partition end sector */
04240             tbl[7] = (BYTE)n;               /* End cylinder */
04241             ST_DWORD(tbl + 8, 63);          /* Partition start in LBA */
04242             ST_DWORD(tbl + 12, n_vol);      /* Partition size in LBA */
04243             ST_WORD(fs->win + BS_55AA, 0xAA55); /* MBR signature */
04244             if (disk_write(pdrv, fs->win, 0, 1) != RES_OK)  /* Write it to the MBR */
04245                 return FR_DISK_ERR;
04246             md = 0xF8;
04247         }
04248     }
04249 
04250     /* Create BPB in the VBR */
04251     tbl = fs->win;                          /* Clear sector */
04252     mem_set(tbl, 0, SS(fs));
04253     mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
04254     i = SS(fs);                             /* Sector size */
04255     ST_WORD(tbl + BPB_BytsPerSec, i);
04256     tbl[BPB_SecPerClus] = (BYTE)au;         /* Sectors per cluster */
04257     ST_WORD(tbl + BPB_RsvdSecCnt, n_rsv);   /* Reserved sectors */
04258     tbl[BPB_NumFATs] = N_FATS;              /* Number of FATs */
04259     i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR;  /* Number of root directory entries */
04260     ST_WORD(tbl + BPB_RootEntCnt, i);
04261     if (n_vol < 0x10000) {                  /* Number of total sectors */
04262         ST_WORD(tbl + BPB_TotSec16, n_vol);
04263     } else {
04264         ST_DWORD(tbl + BPB_TotSec32, n_vol);
04265     }
04266     tbl[BPB_Media] = md;                    /* Media descriptor */
04267     ST_WORD(tbl + BPB_SecPerTrk, 63);       /* Number of sectors per track */
04268     ST_WORD(tbl + BPB_NumHeads, 255);       /* Number of heads */
04269     ST_DWORD(tbl + BPB_HiddSec, b_vol);     /* Hidden sectors */
04270     n = GET_FATTIME();                      /* Use current time as VSN */
04271     if (fmt == FS_FAT32) {
04272         ST_DWORD(tbl + BS_VolID32, n);      /* VSN */
04273         ST_DWORD(tbl + BPB_FATSz32, n_fat); /* Number of sectors per FAT */
04274         ST_DWORD(tbl + BPB_RootClus, 2);    /* Root directory start cluster (2) */
04275         ST_WORD(tbl + BPB_FSInfo, 1);       /* FSINFO record offset (VBR + 1) */
04276         ST_WORD(tbl + BPB_BkBootSec, 6);    /* Backup boot record offset (VBR + 6) */
04277         tbl[BS_DrvNum32] = 0x80;            /* Drive number */
04278         tbl[BS_BootSig32] = 0x29;           /* Extended boot signature */
04279         mem_cpy(tbl + BS_VolLab32, "NO NAME    " "FAT32   ", 19);   /* Volume label, FAT signature */
04280     } else {
04281         ST_DWORD(tbl + BS_VolID, n);        /* VSN */
04282         ST_WORD(tbl + BPB_FATSz16, n_fat);  /* Number of sectors per FAT */
04283         tbl[BS_DrvNum] = 0x80;              /* Drive number */
04284         tbl[BS_BootSig] = 0x29;             /* Extended boot signature */
04285         mem_cpy(tbl + BS_VolLab, "NO NAME    " "FAT     ", 19); /* Volume label, FAT signature */
04286     }
04287     ST_WORD(tbl + BS_55AA, 0xAA55);         /* Signature (Offset is fixed here regardless of sector size) */
04288     if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK)  /* Write it to the VBR sector */
04289         return FR_DISK_ERR;
04290     if (fmt == FS_FAT32)                    /* Write it to the backup VBR if needed (VBR + 6) */
04291         disk_write(pdrv, tbl, b_vol + 6, 1);
04292 
04293     /* Initialize FAT area */
04294     wsect = b_fat;
04295     for (i = 0; i < N_FATS; i++) {      /* Initialize each FAT copy */
04296         mem_set(tbl, 0, SS(fs));            /* 1st sector of the FAT  */
04297         n = md;                             /* Media descriptor byte */
04298         if (fmt != FS_FAT32) {
04299             n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
04300             ST_DWORD(tbl + 0, n);           /* Reserve cluster #0-1 (FAT12/16) */
04301         } else {
04302             n |= 0xFFFFFF00;
04303             ST_DWORD(tbl + 0, n);           /* Reserve cluster #0-1 (FAT32) */
04304             ST_DWORD(tbl + 4, 0xFFFFFFFF);
04305             ST_DWORD(tbl + 8, 0x0FFFFFFF);  /* Reserve cluster #2 for root directory */
04306         }
04307         if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
04308             return FR_DISK_ERR;
04309         mem_set(tbl, 0, SS(fs));            /* Fill following FAT entries with zero */
04310         for (n = 1; n < n_fat; n++) {       /* This loop may take a time on FAT32 volume due to many single sector writes */
04311             if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
04312                 return FR_DISK_ERR;
04313         }
04314     }
04315 
04316     /* Initialize root directory */
04317     i = (fmt == FS_FAT32) ? au : (UINT)n_dir;
04318     do {
04319         if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
04320             return FR_DISK_ERR;
04321     } while (--i);
04322 
04323 #if _USE_TRIM   /* Erase data area if needed */
04324     {
04325         eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1;
04326         disk_ioctl(pdrv, CTRL_TRIM, eb);
04327     }
04328 #endif
04329 
04330     /* Create FSINFO if needed */
04331     if (fmt == FS_FAT32) {
04332         ST_DWORD(tbl + FSI_LeadSig, 0x41615252);
04333         ST_DWORD(tbl + FSI_StrucSig, 0x61417272);
04334         ST_DWORD(tbl + FSI_Free_Count, n_clst - 1); /* Number of free clusters */
04335         ST_DWORD(tbl + FSI_Nxt_Free, 2);            /* Last allocated cluster# */
04336         ST_WORD(tbl + BS_55AA, 0xAA55);
04337         disk_write(pdrv, tbl, b_vol + 1, 1);    /* Write original (VBR + 1) */
04338         disk_write(pdrv, tbl, b_vol + 7, 1);    /* Write backup (VBR + 7) */
04339     }
04340 
04341     return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR;
04342 }
04343 
04344 
04345 
04346 #if _MULTI_PARTITION
04347 /*-----------------------------------------------------------------------*/
04348 /* Create partition table on the physical drive                          */
04349 /*-----------------------------------------------------------------------*/
04350 
04351 FRESULT f_fdisk (
04352     BYTE pdrv,          /* Physical drive number */
04353     const DWORD szt[],  /* Pointer to the size table for each partitions */
04354     void* work          /* Pointer to the working buffer */
04355 )
04356 {
04357     UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
04358     BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
04359     DSTATUS stat;
04360     DWORD sz_disk, sz_part, s_part;
04361 
04362 
04363     stat = disk_initialize(pdrv);
04364     if (stat & STA_NOINIT) return FR_NOT_READY;
04365     if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
04366     if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
04367 
04368     /* Determine CHS in the table regardless of the drive geometry */
04369     for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
04370     if (n == 256) n--;
04371     e_hd = n - 1;
04372     sz_cyl = 63 * n;
04373     tot_cyl = sz_disk / sz_cyl;
04374 
04375     /* Create partition table */
04376     mem_set(buf, 0, _MAX_SS);
04377     p = buf + MBR_Table; b_cyl = 0;
04378     for (i = 0; i < 4; i++, p += SZ_PTE) {
04379         p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;
04380         if (!p_cyl) continue;
04381         s_part = (DWORD)sz_cyl * b_cyl;
04382         sz_part = (DWORD)sz_cyl * p_cyl;
04383         if (i == 0) {   /* Exclude first track of cylinder 0 */
04384             s_hd = 1;
04385             s_part += 63; sz_part -= 63;
04386         } else {
04387             s_hd = 0;
04388         }
04389         e_cyl = b_cyl + p_cyl - 1;
04390         if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
04391 
04392         /* Set partition table */
04393         p[1] = s_hd;                        /* Start head */
04394         p[2] = (BYTE)((b_cyl >> 2) + 1);    /* Start sector */
04395         p[3] = (BYTE)b_cyl;                 /* Start cylinder */
04396         p[4] = 0x06;                        /* System type (temporary setting) */
04397         p[5] = e_hd;                        /* End head */
04398         p[6] = (BYTE)((e_cyl >> 2) + 63);   /* End sector */
04399         p[7] = (BYTE)e_cyl;                 /* End cylinder */
04400         ST_DWORD(p + 8, s_part);            /* Start sector in LBA */
04401         ST_DWORD(p + 12, sz_part);          /* Partition size */
04402 
04403         /* Next partition */
04404         b_cyl += p_cyl;
04405     }
04406     ST_WORD(p, 0xAA55);
04407 
04408     /* Write it to the MBR */
04409     return (disk_write(pdrv, buf, 0, 1) != RES_OK || disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK;
04410 }
04411 
04412 
04413 #endif /* _MULTI_PARTITION */
04414 #endif /* _USE_MKFS && !_FS_READONLY */
04415 
04416 
04417 
04418 
04419 #if _USE_STRFUNC
04420 /*-----------------------------------------------------------------------*/
04421 /* Get a string from the file                                            */
04422 /*-----------------------------------------------------------------------*/
04423 
04424 TCHAR* f_gets (
04425     TCHAR* buff,    /* Pointer to the string buffer to read */
04426     int len,        /* Size of string buffer (characters) */
04427     FIL* fp         /* Pointer to the file object */
04428 )
04429 {
04430     int n = 0;
04431     TCHAR c, *p = buff;
04432     BYTE s[2];
04433     UINT rc;
04434 
04435 
04436     while (n < len - 1) {   /* Read characters until buffer gets filled */
04437 #if _USE_LFN && _LFN_UNICODE
04438 #if _STRF_ENCODE == 3       /* Read a character in UTF-8 */
04439         f_read(fp, s, 1, &rc);
04440         if (rc != 1) break;
04441         c = s[0];
04442         if (c >= 0x80) {
04443             if (c < 0xC0) continue; /* Skip stray trailer */
04444             if (c < 0xE0) {         /* Two-byte sequence */
04445                 f_read(fp, s, 1, &rc);
04446                 if (rc != 1) break;
04447                 c = (c & 0x1F) << 6 | (s[0] & 0x3F);
04448                 if (c < 0x80) c = '?';
04449             } else {
04450                 if (c < 0xF0) {     /* Three-byte sequence */
04451                     f_read(fp, s, 2, &rc);
04452                     if (rc != 2) break;
04453                     c = c << 12 | (s[0] & 0x3F) << 6 | (s[1] & 0x3F);
04454                     if (c < 0x800) c = '?';
04455                 } else {            /* Reject four-byte sequence */
04456                     c = '?';
04457                 }
04458             }
04459         }
04460 #elif _STRF_ENCODE == 2     /* Read a character in UTF-16BE */
04461         f_read(fp, s, 2, &rc);
04462         if (rc != 2) break;
04463         c = s[1] + (s[0] << 8);
04464 #elif _STRF_ENCODE == 1     /* Read a character in UTF-16LE */
04465         f_read(fp, s, 2, &rc);
04466         if (rc != 2) break;
04467         c = s[0] + (s[1] << 8);
04468 #else                       /* Read a character in ANSI/OEM */
04469         f_read(fp, s, 1, &rc);
04470         if (rc != 1) break;
04471         c = s[0];
04472         if (IsDBCS1(c)) {
04473             f_read(fp, s, 1, &rc);
04474             if (rc != 1) break;
04475             c = (c << 8) + s[0];
04476         }
04477         c = ff_convert(c, 1);   /* OEM -> Unicode */
04478         if (!c) c = '?';
04479 #endif
04480 #else                       /* Read a character without conversion */
04481         f_read(fp, s, 1, &rc);
04482         if (rc != 1) break;
04483         c = s[0];
04484 #endif
04485         if (_USE_STRFUNC == 2 && c == '\r') continue;   /* Strip '\r' */
04486         *p++ = c;
04487         n++;
04488         if (c == '\n') break;       /* Break on EOL */
04489     }
04490     *p = 0;
04491     return n ? buff : 0;            /* When no data read (eof or error), return with error. */
04492 }
04493 
04494 
04495 
04496 
04497 #if !_FS_READONLY
04498 #include <stdarg.h>
04499 /*-----------------------------------------------------------------------*/
04500 /* Put a character to the file                                           */
04501 /*-----------------------------------------------------------------------*/
04502 
04503 typedef struct {
04504     FIL* fp;
04505     int idx, nchr;
04506     BYTE buf[64];
04507 } putbuff;
04508 
04509 
04510 static
04511 void putc_bfd (
04512     putbuff* pb,
04513     TCHAR c
04514 )
04515 {
04516     UINT bw;
04517     int i;
04518 
04519 
04520     if (_USE_STRFUNC == 2 && c == '\n')  /* LF -> CRLF conversion */
04521         putc_bfd(pb, '\r');
04522 
04523     i = pb->idx;    /* Buffer write index (-1:error) */
04524     if (i < 0) return;
04525 
04526 #if _USE_LFN && _LFN_UNICODE
04527 #if _STRF_ENCODE == 3           /* Write a character in UTF-8 */
04528     if (c < 0x80) {             /* 7-bit */
04529         pb->buf[i++] = (BYTE)c;
04530     } else {
04531         if (c < 0x800) {        /* 11-bit */
04532             pb->buf[i++] = (BYTE)(0xC0 | c >> 6);
04533         } else {                /* 16-bit */
04534             pb->buf[i++] = (BYTE)(0xE0 | c >> 12);
04535             pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F));
04536         }
04537         pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F));
04538     }
04539 #elif _STRF_ENCODE == 2         /* Write a character in UTF-16BE */
04540     pb->buf[i++] = (BYTE)(c >> 8);
04541     pb->buf[i++] = (BYTE)c;
04542 #elif _STRF_ENCODE == 1         /* Write a character in UTF-16LE */
04543     pb->buf[i++] = (BYTE)c;
04544     pb->buf[i++] = (BYTE)(c >> 8);
04545 #else                           /* Write a character in ANSI/OEM */
04546     c = ff_convert(c, 0);   /* Unicode -> OEM */
04547     if (!c) c = '?';
04548     if (c >= 0x100)
04549         pb->buf[i++] = (BYTE)(c >> 8);
04550     pb->buf[i++] = (BYTE)c;
04551 #endif
04552 #else                           /* Write a character without conversion */
04553     pb->buf[i++] = (BYTE)c;
04554 #endif
04555 
04556     if (i >= (int)(sizeof pb->buf) - 3) {   /* Write buffered characters to the file */
04557         f_write(pb->fp, pb->buf, (UINT)i, &bw);
04558         i = (bw == (UINT)i) ? 0 : -1;
04559     }
04560     pb->idx = i;
04561     pb->nchr++;
04562 }
04563 
04564 
04565 
04566 int f_putc (
04567     TCHAR c,    /* A character to be output */
04568     FIL* fp     /* Pointer to the file object */
04569 )
04570 {
04571     putbuff pb;
04572     UINT nw;
04573 
04574 
04575     pb.fp = fp;         /* Initialize output buffer */
04576     pb.nchr = pb.idx = 0;
04577 
04578     putc_bfd(&pb, c);   /* Put a character */
04579 
04580     if (   pb.idx >= 0  /* Flush buffered characters to the file */
04581         && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
04582         && (UINT)pb.idx == nw) return pb.nchr;
04583     return EOF;
04584 }
04585 
04586 
04587 
04588 
04589 /*-----------------------------------------------------------------------*/
04590 /* Put a string to the file                                              */
04591 /*-----------------------------------------------------------------------*/
04592 
04593 int f_puts (
04594     const TCHAR* str,   /* Pointer to the string to be output */
04595     FIL* fp             /* Pointer to the file object */
04596 )
04597 {
04598     putbuff pb;
04599     UINT nw;
04600 
04601 
04602     pb.fp = fp;             /* Initialize output buffer */
04603     pb.nchr = pb.idx = 0;
04604 
04605     while (*str)            /* Put the string */
04606         putc_bfd(&pb, *str++);
04607 
04608     if (   pb.idx >= 0      /* Flush buffered characters to the file */
04609         && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
04610         && (UINT)pb.idx == nw) return pb.nchr;
04611     return EOF;
04612 }
04613 
04614 
04615 
04616 
04617 /*-----------------------------------------------------------------------*/
04618 /* Put a formatted string to the file                                    */
04619 /*-----------------------------------------------------------------------*/
04620 
04621 int f_printf (
04622     FIL* fp,            /* Pointer to the file object */
04623     const TCHAR* fmt,   /* Pointer to the format string */
04624     ...                 /* Optional arguments... */
04625 )
04626 {
04627     va_list arp;
04628     BYTE f, r;
04629     UINT nw, i, j, w;
04630     DWORD v;
04631     TCHAR c, d, s[16], *p;
04632     putbuff pb;
04633 
04634 
04635     pb.fp = fp;             /* Initialize output buffer */
04636     pb.nchr = pb.idx = 0;
04637 
04638     va_start(arp, fmt);
04639 
04640     for (;;) {
04641         c = *fmt++;
04642         if (c == 0) break;          /* End of string */
04643         if (c != '%') {             /* Non escape character */
04644             putc_bfd(&pb, c);
04645             continue;
04646         }
04647         w = f = 0;
04648         c = *fmt++;
04649         if (c == '0') {             /* Flag: '0' padding */
04650             f = 1; c = *fmt++;
04651         } else {
04652             if (c == '-') {         /* Flag: left justified */
04653                 f = 2; c = *fmt++;
04654             }
04655         }
04656         while (IsDigit(c)) {        /* Precision */
04657             w = w * 10 + c - '0';
04658             c = *fmt++;
04659         }
04660         if (c == 'l' || c == 'L') { /* Prefix: Size is long int */
04661             f |= 4; c = *fmt++;
04662         }
04663         if (!c) break;
04664         d = c;
04665         if (IsLower(d)) d -= 0x20;
04666         switch (d) {                /* Type is... */
04667         case 'S' :                  /* String */
04668             p = va_arg(arp, TCHAR*);
04669             for (j = 0; p[j]; j++) ;
04670             if (!(f & 2)) {
04671                 while (j++ < w) putc_bfd(&pb, ' ');
04672             }
04673             while (*p) putc_bfd(&pb, *p++);
04674             while (j++ < w) putc_bfd(&pb, ' ');
04675             continue;
04676         case 'C' :                  /* Character */
04677             putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue;
04678         case 'B' :                  /* Binary */
04679             r = 2; break;
04680         case 'O' :                  /* Octal */
04681             r = 8; break;
04682         case 'D' :                  /* Signed decimal */
04683         case 'U' :                  /* Unsigned decimal */
04684             r = 10; break;
04685         case 'X' :                  /* Hexdecimal */
04686             r = 16; break;
04687         default:                    /* Unknown type (pass-through) */
04688             putc_bfd(&pb, c); continue;
04689         }
04690 
04691         /* Get an argument and put it in numeral */
04692         v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int));
04693         if (d == 'D' && (v & 0x80000000)) {
04694             v = 0 - v;
04695             f |= 8;
04696         }
04697         i = 0;
04698         do {
04699             d = (TCHAR)(v % r); v /= r;
04700             if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
04701             s[i++] = d + '0';
04702         } while (v && i < sizeof s / sizeof s[0]);
04703         if (f & 8) s[i++] = '-';
04704         j = i; d = (f & 1) ? '0' : ' ';
04705         while (!(f & 2) && j++ < w) putc_bfd(&pb, d);
04706         do putc_bfd(&pb, s[--i]); while (i);
04707         while (j++ < w) putc_bfd(&pb, d);
04708     }
04709 
04710     va_end(arp);
04711 
04712     if (   pb.idx >= 0      /* Flush buffered characters to the file */
04713         && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
04714         && (UINT)pb.idx == nw) return pb.nchr;
04715     return EOF;
04716 }
04717 
04718 #endif /* !_FS_READONLY */
04719 #endif /* _USE_STRFUNC */