1 /*----------------------------------------------------------------------------/
2 / FatFs - FAT file system module R0.09a (C)ChaN, 2012
3 /-----------------------------------------------------------------------------/
4 / FatFs module is a generic FAT file system module for small embedded systems.
5 / This is a free software that opened for education, research and commercial
6 / developments under license policy of following terms.
8 / Copyright (C) 2012, ChaN, all right reserved.
10 / * The FatFs module is a free software and there is NO WARRANTY.
11 / * No restriction on use. You can use, modify and redistribute it for
12 / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
13 / * Redistributions of source code must retain the above copyright notice.
15 /-----------------------------------------------------------------------------/
16 / Feb 26,'06 R0.00 Prototype.
18 / Apr 29,'06 R0.01 First stable version.
20 / Jun 01,'06 R0.02 Added FAT12 support.
21 / Removed unbuffered mode.
22 / Fixed a problem on small (<32M) partition.
23 / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
25 / Sep 22,'06 R0.03 Added f_rename().
26 / Changed option _FS_MINIMUM to _FS_MINIMIZE.
27 / Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast.
28 / Fixed f_mkdir() creates incorrect directory on FAT32.
30 / Feb 04,'07 R0.04 Supported multiple drive system.
31 / Changed some interfaces for multiple drive system.
32 / Changed f_mountdrv() to f_mount().
34 / Apr 01,'07 R0.04a Supported multiple partitions on a physical drive.
35 / Added a capability of extending file size to f_lseek().
36 / Added minimization level 3.
37 / Fixed an endian sensitive code in f_mkfs().
38 / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
39 / Added FSInfo support.
40 / Fixed DBCS name can result FR_INVALID_NAME.
41 / Fixed short seek (<= csize) collapses the file object.
43 / Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs().
44 / Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
45 / Fixed f_mkdir() on FAT32 creates incorrect directory.
46 / Feb 03,'08 R0.05a Added f_truncate() and f_utime().
47 / Fixed off by one error at FAT sub-type determination.
48 / Fixed btr in f_read() can be mistruncated.
49 / Fixed cached sector is not flushed when create and close without write.
51 / Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets().
52 / Improved performance of f_lseek() on moving to the same or following cluster.
54 / Apr 01,'09 R0.07 Merged Tiny-FatFs as a configuration option. (_FS_TINY)
55 / Added long file name feature.
56 / Added multiple code page feature.
57 / Added re-entrancy for multitask operation.
58 / Added auto cluster size selection to f_mkfs().
59 / Added rewind option to f_readdir().
60 / Changed result code of critical errors.
61 / Renamed string functions to avoid name collision.
62 / Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
63 / Added multiple sector size feature.
64 / Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
65 / Fixed wrong cache control in f_lseek().
66 / Added relative path feature.
67 / Added f_chdir() and f_chdrive().
68 / Added proper case conversion to extended char.
69 / Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
70 / Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
71 / Fixed name matching error on the 13 char boundary.
72 / Added a configuration option, _LFN_UNICODE.
73 / Changed f_readdir() to return the SFN with always upper case on non-LFN cfg.
75 / May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN = 3)
76 / Added file lock feature. (_FS_SHARE)
77 / Added fast seek feature. (_USE_FASTSEEK)
78 / Changed some types on the API, XCHAR->TCHAR.
79 / Changed fname member in the FILINFO structure on Unicode cfg.
80 / String functions support UTF-8 encoding files on Unicode cfg.
81 / Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2)
82 / Added sector erase feature. (_USE_ERASE)
83 / Moved file lock semaphore table from fs object to the bss.
84 / Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'.
85 / Fixed f_mkfs() creates wrong FAT32 volume.
86 / Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write().
87 / f_lseek() reports required table size on creating CLMP.
88 / Extended format syntax of f_printf function.
89 / Ignores duplicated directory separators in given path name.
91 / Sep 06,'11 R0.09 f_mkfs() supports multiple partition to finish the multiple partition feature.
92 / Added f_fdisk(). (_MULTI_PARTITION = 2)
93 / Aug 27,'12 R0.09a Fixed assertion failure due to OS/2 EA on FAT12/16 volume.
94 / Changed f_open() and f_opendir reject null object pointer to avoid crash.
95 / Changed option name _FS_SHARE to _FS_LOCK.
96 /---------------------------------------------------------------------------*/
98 #include "ff.h" /* FatFs configurations and declarations */
99 #include "diskio.h" /* Declarations of low level disk I/O functions */
102 /*--------------------------------------------------------------------------
104 Module Private Definitions
106 ---------------------------------------------------------------------------*/
108 #if _FATFS != 4004 /* Revision ID */
109 #error Wrong include file (ff.h).
113 /* Definitions on sector size */
114 #if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096
115 #error Wrong sector size.
118 #define SS(fs) ((fs)->ssize) /* Variable sector size */
120 #define SS(fs) 512U /* Fixed sector size */
124 /* Reentrancy related */
127 #error Static LFN work area must not be used in re-entrant configuration.
129 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
130 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
133 #define LEAVE_FF(fs, res) return res
136 #define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
139 /* File access control feature */
142 #error _FS_LOCK must be 0 on read-only cfg.
145 FATFS *fs; /* File ID 1, volume (NULL:blank entry) */
146 DWORD clu; /* File ID 2, directory */
147 WORD idx; /* File ID 3, directory index */
148 WORD ctr; /* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */
154 /* DBCS code ranges and SBCS extend char conversion table */
156 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */
157 #define _DF1S 0x81 /* DBC 1st byte range 1 start */
158 #define _DF1E 0x9F /* DBC 1st byte range 1 end */
159 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */
160 #define _DF2E 0xFC /* DBC 1st byte range 2 end */
161 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */
162 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */
163 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */
164 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */
166 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
174 #elif _CODE_PAGE == 949 /* Korean */
184 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
192 #elif _CODE_PAGE == 437 /* U.S. (OEM) */
194 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F,0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
195 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
196 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
197 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
199 #elif _CODE_PAGE == 720 /* Arabic (OEM) */
201 #define _EXCVT {0x80,0x81,0x45,0x41,0x84,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x49,0x49,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
202 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
203 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
204 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
206 #elif _CODE_PAGE == 737 /* Greek (OEM) */
208 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
209 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
210 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
211 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
213 #elif _CODE_PAGE == 775 /* Baltic (OEM) */
215 #define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
216 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
217 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
218 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
220 #elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */
222 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
223 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
224 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
225 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
227 #elif _CODE_PAGE == 852 /* Latin 2 (OEM) */
229 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F,0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0x9F, \
230 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
231 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
232 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
234 #elif _CODE_PAGE == 855 /* Cyrillic (OEM) */
236 #define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F,0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
237 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
238 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
239 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
241 #elif _CODE_PAGE == 857 /* Turkish (OEM) */
243 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x98,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
244 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
245 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
246 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
248 #elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */
250 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
251 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
252 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
253 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
255 #elif _CODE_PAGE == 862 /* Hebrew (OEM) */
257 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
258 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
259 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
260 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
262 #elif _CODE_PAGE == 866 /* Russian (OEM) */
264 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
265 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
266 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
267 0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
269 #elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */
271 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
272 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
273 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
274 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
276 #elif _CODE_PAGE == 1250 /* Central Europe (Windows) */
278 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
279 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xA3,0xB4,0xB5,0xB6,0xB7,0xB8,0xA5,0xAA,0xBB,0xBC,0xBD,0xBC,0xAF, \
280 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
281 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
283 #elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */
285 #define _EXCVT {0x80,0x81,0x82,0x82,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x80,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
286 0xA0,0xA2,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB2,0xA5,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xA3,0xBD,0xBD,0xAF, \
287 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
288 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF}
290 #elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */
292 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0xAd,0x9B,0x8C,0x9D,0xAE,0x9F, \
293 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
294 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
295 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
297 #elif _CODE_PAGE == 1253 /* Greek (Windows) */
299 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
300 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
301 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xA2,0xB8,0xB9,0xBA, \
302 0xE0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xFB,0xBC,0xFD,0xBF,0xFF}
304 #elif _CODE_PAGE == 1254 /* Turkish (Windows) */
306 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x9D,0x9E,0x9F, \
307 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
308 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
309 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
311 #elif _CODE_PAGE == 1255 /* Hebrew (Windows) */
313 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
314 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
315 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
316 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
318 #elif _CODE_PAGE == 1256 /* Arabic (Windows) */
320 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x8C,0x9D,0x9E,0x9F, \
321 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
322 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
323 0x41,0xE1,0x41,0xE3,0xE4,0xE5,0xE6,0x43,0x45,0x45,0x45,0x45,0xEC,0xED,0x49,0x49,0xF0,0xF1,0xF2,0xF3,0x4F,0xF5,0xF6,0xF7,0xF8,0x55,0xFA,0x55,0x55,0xFD,0xFE,0xFF}
325 #elif _CODE_PAGE == 1257 /* Baltic (Windows) */
327 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
328 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xBC,0xBD,0xBE,0xAF, \
329 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
330 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
332 #elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */
334 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0xAC,0x9D,0x9E,0x9F, \
335 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
336 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
337 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xEC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xFE,0x9F}
339 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
341 #error Cannot use LFN feature without valid code page.
346 #error Unknown code page
351 /* Character code support macros */
352 #define IsUpper(c) (((c)>='A')&&((c)<='Z'))
353 #define IsLower(c) (((c)>='a')&&((c)<='z'))
354 #define IsDigit(c) (((c)>='0')&&((c)<='9'))
356 #if _DF1S /* Code page is DBCS */
358 #ifdef _DF2S /* Two 1st byte areas */
359 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
360 #else /* One 1st byte area */
361 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
364 #ifdef _DS3S /* Three 2nd byte areas */
365 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
366 #else /* Two 2nd byte areas */
367 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
370 #else /* Code page is SBCS */
378 /* Name status flags */
379 #define NS 11 /* Index of name status byte in fn[] */
380 #define NS_LOSS 0x01 /* Out of 8.3 format */
381 #define NS_LFN 0x02 /* Force to create LFN entry */
382 #define NS_LAST 0x04 /* Last segment */
383 #define NS_BODY 0x08 /* Lower case flag (body) */
384 #define NS_EXT 0x10 /* Lower case flag (ext) */
385 #define NS_DOT 0x20 /* Dot entry */
388 /* FAT sub-type boundaries */
389 /* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */
390 #define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */
391 #define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */
394 /* FatFs refers the members in the FAT structures as byte array instead of
395 / structure member because the structure is not binary compatible between
396 / different platforms */
398 #define BS_jmpBoot 0 /* Jump instruction (3) */
399 #define BS_OEMName 3 /* OEM name (8) */
400 #define BPB_BytsPerSec 11 /* Sector size [byte] (2) */
401 #define BPB_SecPerClus 13 /* Cluster size [sector] (1) */
402 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */
403 #define BPB_NumFATs 16 /* Number of FAT copies (1) */
404 #define BPB_RootEntCnt 17 /* Number of root dir entries for FAT12/16 (2) */
405 #define BPB_TotSec16 19 /* Volume size [sector] (2) */
406 #define BPB_Media 21 /* Media descriptor (1) */
407 #define BPB_FATSz16 22 /* FAT size [sector] (2) */
408 #define BPB_SecPerTrk 24 /* Track size [sector] (2) */
409 #define BPB_NumHeads 26 /* Number of heads (2) */
410 #define BPB_HiddSec 28 /* Number of special hidden sectors (4) */
411 #define BPB_TotSec32 32 /* Volume size [sector] (4) */
412 #define BS_DrvNum 36 /* Physical drive number (2) */
413 #define BS_BootSig 38 /* Extended boot signature (1) */
414 #define BS_VolID 39 /* Volume serial number (4) */
415 #define BS_VolLab 43 /* Volume label (8) */
416 #define BS_FilSysType 54 /* File system type (1) */
417 #define BPB_FATSz32 36 /* FAT size [sector] (4) */
418 #define BPB_ExtFlags 40 /* Extended flags (2) */
419 #define BPB_FSVer 42 /* File system version (2) */
420 #define BPB_RootClus 44 /* Root dir first cluster (4) */
421 #define BPB_FSInfo 48 /* Offset of FSInfo sector (2) */
422 #define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */
423 #define BS_DrvNum32 64 /* Physical drive number (2) */
424 #define BS_BootSig32 66 /* Extended boot signature (1) */
425 #define BS_VolID32 67 /* Volume serial number (4) */
426 #define BS_VolLab32 71 /* Volume label (8) */
427 #define BS_FilSysType32 82 /* File system type (1) */
428 #define FSI_LeadSig 0 /* FSI: Leading signature (4) */
429 #define FSI_StrucSig 484 /* FSI: Structure signature (4) */
430 #define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */
431 #define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */
432 #define MBR_Table 446 /* MBR: Partition table offset (2) */
433 #define SZ_PTE 16 /* MBR: Size of a partition table entry */
434 #define BS_55AA 510 /* Boot sector signature (2) */
436 #define DIR_Name 0 /* Short file name (11) */
437 #define DIR_Attr 11 /* Attribute (1) */
438 #define DIR_NTres 12 /* NT flag (1) */
439 #define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */
440 #define DIR_CrtTime 14 /* Created time (2) */
441 #define DIR_CrtDate 16 /* Created date (2) */
442 #define DIR_LstAccDate 18 /* Last accessed date (2) */
443 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */
444 #define DIR_WrtTime 22 /* Modified time (2) */
445 #define DIR_WrtDate 24 /* Modified date (2) */
446 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */
447 #define DIR_FileSize 28 /* File size (4) */
448 #define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */
449 #define LDIR_Attr 11 /* LFN attribute (1) */
450 #define LDIR_Type 12 /* LFN type (1) */
451 #define LDIR_Chksum 13 /* Sum of corresponding SFN entry */
452 #define LDIR_FstClusLO 26 /* Filled by zero (0) */
453 #define SZ_DIR 32 /* Size of a directory entry */
454 #define LLE 0x40 /* Last long entry flag in LDIR_Ord */
455 #define DDE 0xE5 /* Deleted directory entry mark in DIR_Name[0] */
456 #define NDDE 0x05 /* Replacement of the character collides with DDE */
459 /*------------------------------------------------------------*/
460 /* Module private work area */
461 /*------------------------------------------------------------*/
462 /* Note that uninitialized variables with static duration are
463 / zeroed/nulled at start-up. If not, the compiler or start-up
464 / routine is out of ANSI-C standard.
469 FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */
471 #error Number of volumes must not be 0.
475 WORD Fsid; /* File system mount ID */
479 BYTE CurrVol; /* Current drive */
484 FILESEM Files[_FS_LOCK]; /* File lock semaphores */
487 #if _USE_LFN == 0 /* No LFN feature */
488 #define DEF_NAMEBUF BYTE sfn[12]
489 #define INIT_BUF(dobj) (dobj).fn = sfn
492 #elif _USE_LFN == 1 /* LFN feature with static working buffer */
493 static WCHAR LfnBuf[_MAX_LFN+1];
494 #define DEF_NAMEBUF BYTE sfn[12]
495 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
498 #elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */
499 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1]
500 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; }
503 #elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */
504 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn
505 #define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \
506 if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \
507 (dobj).lfn = lfn; (dobj).fn = sfn; }
508 #define FREE_BUF() ff_memfree(lfn)
511 #error Wrong LFN configuration.
517 /*--------------------------------------------------------------------------
519 Module Private Functions
521 ---------------------------------------------------------------------------*/
524 /*-----------------------------------------------------------------------*/
525 /* String functions */
526 /*-----------------------------------------------------------------------*/
528 /* Copy memory to memory */
530 void mem_cpy (void* dst, const void* src, UINT cnt) {
531 BYTE *d = (BYTE*)dst;
532 const BYTE *s = (const BYTE*)src;
534 #if _WORD_ACCESS == 1
535 while (cnt >= sizeof (int)) {
537 d += sizeof (int); s += sizeof (int);
547 void mem_set (void* dst, int val, UINT cnt) {
548 BYTE *d = (BYTE*)dst;
554 /* Compare memory to memory */
556 int mem_cmp (const void* dst, const void* src, UINT cnt) {
557 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
560 while (cnt-- && (r = *d++ - *s++) == 0) ;
564 /* Check if chr is contained in the string */
566 int chk_chr (const char* str, int chr) {
567 while (*str && *str != chr) str++;
573 /*-----------------------------------------------------------------------*/
574 /* Request/Release grant to access the volume */
575 /*-----------------------------------------------------------------------*/
580 FATFS *fs /* File system object */
583 return ff_req_grant(fs->sobj);
589 FATFS *fs, /* File system object */
590 FRESULT res /* Result code to be returned */
594 res != FR_NOT_ENABLED &&
595 res != FR_INVALID_DRIVE &&
596 res != FR_INVALID_OBJECT &&
598 ff_rel_grant(fs->sobj);
605 /*-----------------------------------------------------------------------*/
606 /* File lock control functions */
607 /*-----------------------------------------------------------------------*/
611 FRESULT chk_lock ( /* Check if the file can be accessed */
612 DIR* dj, /* Directory object pointing the file to be checked */
613 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
618 /* Search file semaphore table */
619 for (i = be = 0; i < _FS_LOCK; i++) {
620 if (Files[i].fs) { /* Existing entry */
621 if (Files[i].fs == dj->fs && /* Check if the file matched with an open file */
622 Files[i].clu == dj->sclust &&
623 Files[i].idx == dj->index) break;
624 } else { /* Blank entry */
628 if (i == _FS_LOCK) /* The file is not opened */
629 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new file? */
631 /* The file has been opened. Reject any open against writing file and all write mode open */
632 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
637 int enq_lock (void) /* Check if an entry is available for a new file */
641 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
642 return (i == _FS_LOCK) ? 0 : 1;
647 UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */
648 DIR* dj, /* Directory object pointing the file to register or increment */
649 int acc /* Desired access mode (0:Read, !0:Write) */
655 for (i = 0; i < _FS_LOCK; i++) { /* Find the file */
656 if (Files[i].fs == dj->fs &&
657 Files[i].clu == dj->sclust &&
658 Files[i].idx == dj->index) break;
661 if (i == _FS_LOCK) { /* Not opened. Register it as new. */
662 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
663 if (i == _FS_LOCK) return 0; /* No space to register (int err) */
664 Files[i].fs = dj->fs;
665 Files[i].clu = dj->sclust;
666 Files[i].idx = dj->index;
670 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */
672 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
679 FRESULT dec_lock ( /* Decrement file open counter */
680 UINT i /* Semaphore index */
687 if (--i < _FS_LOCK) {
689 if (n == 0x100) n = 0;
692 if (!n) Files[i].fs = 0;
702 void clear_lock ( /* Clear lock entries of the volume */
708 for (i = 0; i < _FS_LOCK; i++) {
709 if (Files[i].fs == fs) Files[i].fs = 0;
716 /*-----------------------------------------------------------------------*/
717 /* Change window offset */
718 /*-----------------------------------------------------------------------*/
721 FRESULT move_window (
722 FATFS *fs, /* File system object */
723 DWORD sector /* Sector number to make appearance in the fs->win[] */
724 ) /* Move to zero only writes back dirty window */
730 if (wsect != sector) { /* Changed current window */
732 if (fs->wflag) { /* Write back dirty window if needed */
733 if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK)
736 if (wsect < (fs->fatbase + fs->fsize)) { /* In FAT area */
738 for (nf = fs->n_fats; nf > 1; nf--) { /* Reflect the change to all FAT copies */
740 disk_write(fs->drv, fs->win, wsect, 1);
746 if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK)
748 fs->winsect = sector;
758 /*-----------------------------------------------------------------------*/
759 /* Clean-up cached data */
760 /*-----------------------------------------------------------------------*/
763 FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */
764 FATFS *fs /* File system object */
770 res = move_window(fs, 0);
772 /* Update FSInfo sector if needed */
773 if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
775 /* Create FSInfo structure */
776 mem_set(fs->win, 0, 512);
777 ST_WORD(fs->win+BS_55AA, 0xAA55);
778 ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
779 ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
780 ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
781 ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
782 /* Write it into the FSInfo sector */
783 disk_write(fs->drv, fs->win, fs->fsi_sector, 1);
786 /* Make sure that no pending write process in the physical drive */
787 if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
798 /*-----------------------------------------------------------------------*/
799 /* Get sector# from cluster# */
800 /*-----------------------------------------------------------------------*/
803 DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
804 FATFS *fs, /* File system object */
805 DWORD clst /* Cluster# to be converted */
809 if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */
810 return clst * fs->csize + fs->database;
816 /*-----------------------------------------------------------------------*/
817 /* FAT access - Read value of a FAT entry */
818 /*-----------------------------------------------------------------------*/
821 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */
822 FATFS *fs, /* File system object */
823 DWORD clst /* Cluster# to get the link information */
830 if (clst < 2 || clst >= fs->n_fatent) /* Check range */
833 switch (fs->fs_type) {
835 bc = (UINT)clst; bc += bc / 2;
836 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
837 wc = fs->win[bc % SS(fs)]; bc++;
838 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
839 wc |= fs->win[bc % SS(fs)] << 8;
840 return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
843 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break;
844 p = &fs->win[clst * 2 % SS(fs)];
848 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break;
849 p = &fs->win[clst * 4 % SS(fs)];
850 return LD_DWORD(p) & 0x0FFFFFFF;
853 return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */
859 /*-----------------------------------------------------------------------*/
860 /* FAT access - Change value of a FAT entry */
861 /*-----------------------------------------------------------------------*/
865 FATFS *fs, /* File system object */
866 DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */
867 DWORD val /* New value to mark the cluster */
875 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
879 switch (fs->fs_type) {
881 bc = (UINT)clst; bc += bc / 2;
882 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
883 if (res != FR_OK) break;
884 p = &fs->win[bc % SS(fs)];
885 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
888 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
889 if (res != FR_OK) break;
890 p = &fs->win[bc % SS(fs)];
891 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
895 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
896 if (res != FR_OK) break;
897 p = &fs->win[clst * 2 % SS(fs)];
898 ST_WORD(p, (WORD)val);
902 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
903 if (res != FR_OK) break;
904 p = &fs->win[clst * 4 % SS(fs)];
905 val |= LD_DWORD(p) & 0xF0000000;
917 #endif /* !_FS_READONLY */
922 /*-----------------------------------------------------------------------*/
923 /* FAT handling - Remove a cluster chain */
924 /*-----------------------------------------------------------------------*/
927 FRESULT remove_chain (
928 FATFS *fs, /* File system object */
929 DWORD clst /* Cluster# to remove a chain from */
935 DWORD scl = clst, ecl = clst, rt[2];
938 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
943 while (clst < fs->n_fatent) { /* Not a last link? */
944 nxt = get_fat(fs, clst); /* Get cluster status */
945 if (nxt == 0) break; /* Empty cluster? */
946 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
947 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
948 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
949 if (res != FR_OK) break;
950 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */
955 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
957 } else { /* End of contiguous clusters */
958 rt[0] = clust2sect(fs, scl); /* Start sector */
959 rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */
960 disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, rt); /* Erase the block */
964 clst = nxt; /* Next cluster */
975 /*-----------------------------------------------------------------------*/
976 /* FAT handling - Stretch or Create a cluster chain */
977 /*-----------------------------------------------------------------------*/
980 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
981 FATFS *fs, /* File system object */
982 DWORD clst /* Cluster# to stretch. 0 means create a new chain. */
989 if (clst == 0) { /* Create a new chain */
990 scl = fs->last_clust; /* Get suggested start point */
991 if (!scl || scl >= fs->n_fatent) scl = 1;
993 else { /* Stretch the current chain */
994 cs = get_fat(fs, clst); /* Check the cluster status */
995 if (cs < 2) return 1; /* It is an invalid cluster */
996 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
1000 ncl = scl; /* Start cluster */
1002 ncl++; /* Next cluster */
1003 if (ncl >= fs->n_fatent) { /* Wrap around */
1005 if (ncl > scl) return 0; /* No free cluster */
1007 cs = get_fat(fs, ncl); /* Get the cluster status */
1008 if (cs == 0) break; /* Found a free cluster */
1009 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */
1011 if (ncl == scl) return 0; /* No free cluster */
1014 res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */
1015 if (res == FR_OK && clst != 0) {
1016 res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */
1019 fs->last_clust = ncl; /* Update FSINFO */
1020 if (fs->free_clust != 0xFFFFFFFF) {
1025 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
1028 return ncl; /* Return new cluster number or error code */
1030 #endif /* !_FS_READONLY */
1034 /*-----------------------------------------------------------------------*/
1035 /* FAT handling - Convert offset into cluster with link map table */
1036 /*-----------------------------------------------------------------------*/
1040 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
1041 FIL* fp, /* Pointer to the file object */
1042 DWORD ofs /* File offset to be converted to cluster# */
1045 DWORD cl, ncl, *tbl;
1048 tbl = fp->cltbl + 1; /* Top of CLMT */
1049 cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */
1051 ncl = *tbl++; /* Number of cluters in the fragment */
1052 if (!ncl) return 0; /* End of table? (error) */
1053 if (cl < ncl) break; /* In this fragment? */
1054 cl -= ncl; tbl++; /* Next fragment */
1056 return cl + *tbl; /* Return the cluster number */
1058 #endif /* _USE_FASTSEEK */
1062 /*-----------------------------------------------------------------------*/
1063 /* Directory handling - Set directory index */
1064 /*-----------------------------------------------------------------------*/
1068 FATFS_DIR *dj, /* Pointer to directory object */
1069 WORD idx /* Index of directory table */
1078 if (clst == 1 || clst >= dj->fs->n_fatent) /* Check start cluster range */
1080 if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
1081 clst = dj->fs->dirbase;
1083 if (clst == 0) { /* Static table (root-dir in FAT12/16) */
1085 if (idx >= dj->fs->n_rootdir) /* Index is out of range */
1087 dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */
1089 else { /* Dynamic table (sub-dirs or root-dir in FAT32) */
1090 ic = SS(dj->fs) / SZ_DIR * dj->fs->csize; /* Entries per cluster */
1091 while (idx >= ic) { /* Follow cluster chain */
1092 clst = get_fat(dj->fs, clst); /* Get next cluster */
1093 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1094 if (clst < 2 || clst >= dj->fs->n_fatent) /* Reached to end of table or int error */
1099 dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */
1102 dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */
1104 return FR_OK; /* Seek succeeded */
1110 /*-----------------------------------------------------------------------*/
1111 /* Directory handling - Move directory table index next */
1112 /*-----------------------------------------------------------------------*/
1115 FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */
1116 FATFS_DIR *dj, /* Pointer to directory object */
1117 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
1124 stretch = stretch; /* To suppress warning on read-only cfg. */
1126 if (!i || !dj->sect) /* Report EOT when index has reached 65535 */
1129 if (!(i % (SS(dj->fs) / SZ_DIR))) { /* Sector changed? */
1130 dj->sect++; /* Next sector */
1132 if (dj->clust == 0) { /* Static table */
1133 if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */
1136 else { /* Dynamic table */
1137 if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
1138 clst = get_fat(dj->fs, dj->clust); /* Get next cluster */
1139 if (clst <= 1) return FR_INT_ERR;
1140 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1141 if (clst >= dj->fs->n_fatent) { /* When it reached end of dynamic table */
1144 if (!stretch) return FR_NO_FILE; /* When do not stretch, report EOT */
1145 clst = create_chain(dj->fs, dj->clust); /* Stretch cluster chain */
1146 if (clst == 0) return FR_DENIED; /* No free cluster */
1147 if (clst == 1) return FR_INT_ERR;
1148 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1149 /* Clean-up stretched table */
1150 if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */
1151 mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */
1152 dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */
1153 for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */
1155 if (move_window(dj->fs, 0)) return FR_DISK_ERR;
1158 dj->fs->winsect -= c; /* Rewind window address */
1160 return FR_NO_FILE; /* Report EOT */
1163 dj->clust = clst; /* Initialize data for new cluster */
1164 dj->sect = clust2sect(dj->fs, clst);
1170 dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR;
1178 /*-----------------------------------------------------------------------*/
1179 /* Directory handling - Load/Store start cluster number */
1180 /*-----------------------------------------------------------------------*/
1184 FATFS *fs, /* Pointer to the fs object */
1185 BYTE *dir /* Pointer to the directory entry */
1190 cl = LD_WORD(dir+DIR_FstClusLO);
1191 if (fs->fs_type == FS_FAT32)
1192 cl |= (DWORD)LD_WORD(dir+DIR_FstClusHI) << 16;
1201 BYTE *dir, /* Pointer to the directory entry */
1202 DWORD cl /* Value to be set */
1205 ST_WORD(dir+DIR_FstClusLO, cl);
1206 ST_WORD(dir+DIR_FstClusHI, cl >> 16);
1212 /*-----------------------------------------------------------------------*/
1213 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
1214 /*-----------------------------------------------------------------------*/
1217 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */
1221 int cmp_lfn ( /* 1:Matched, 0:Not matched */
1222 WCHAR *lfnbuf, /* Pointer to the LFN to be compared */
1223 BYTE *dir /* Pointer to the directory entry containing a part of LFN */
1230 i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13; /* Get offset in the LFN buffer */
1233 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
1234 if (wc) { /* Last char has not been processed */
1235 wc = ff_wtoupper(uc); /* Convert it to upper case */
1236 if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */
1237 return 0; /* Not matched */
1239 if (uc != 0xFFFF) return 0; /* Check filler */
1241 } while (++s < 13); /* Repeat until all chars in the entry are checked */
1243 if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i]) /* Last segment matched but different length */
1246 return 1; /* The part of LFN matched */
1252 int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */
1253 WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */
1254 BYTE *dir /* Pointer to the directory entry */
1261 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1265 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
1266 if (wc) { /* Last char has not been processed */
1267 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
1268 lfnbuf[i++] = wc = uc; /* Store it */
1270 if (uc != 0xFFFF) return 0; /* Check filler */
1272 } while (++s < 13); /* Read all character in the entry */
1274 if (dir[LDIR_Ord] & LLE) { /* Put terminator if it is the last LFN part */
1275 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
1286 const WCHAR *lfnbuf, /* Pointer to the LFN buffer */
1287 BYTE *dir, /* Pointer to the directory entry */
1288 BYTE ord, /* LFN order (1-20) */
1289 BYTE sum /* SFN sum */
1296 dir[LDIR_Chksum] = sum; /* Set check sum */
1297 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
1299 ST_WORD(dir+LDIR_FstClusLO, 0);
1301 i = (ord - 1) * 13; /* Get offset in the LFN buffer */
1304 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */
1305 ST_WORD(dir+LfnOfs[s], wc); /* Put it */
1306 if (!wc) wc = 0xFFFF; /* Padding chars following last char */
1308 if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE; /* Bottom LFN part is the start of LFN sequence */
1309 dir[LDIR_Ord] = ord; /* Set the LFN order */
1317 /*-----------------------------------------------------------------------*/
1318 /* Create numbered name */
1319 /*-----------------------------------------------------------------------*/
1322 BYTE *dst, /* Pointer to generated SFN */
1323 const BYTE *src, /* Pointer to source SFN to be modified */
1324 const WCHAR *lfn, /* Pointer to LFN */
1325 WORD seq /* Sequence number */
1332 mem_cpy(dst, src, 11);
1334 if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */
1335 do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; while (*lfn);
1338 /* itoa (hexdecimal) */
1341 c = (seq % 16) + '0';
1342 if (c > '9') c += 7;
1348 /* Append the number */
1349 for (j = 0; j < i && dst[j] != ' '; j++) {
1350 if (IsDBCS1(dst[j])) {
1351 if (j == i - 1) break;
1356 dst[j++] = (i < 8) ? ns[i++] : ' ';
1364 /*-----------------------------------------------------------------------*/
1365 /* Calculate sum of an SFN */
1366 /*-----------------------------------------------------------------------*/
1370 const BYTE *dir /* Ptr to directory entry */
1376 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
1384 /*-----------------------------------------------------------------------*/
1385 /* Directory handling - Find an object in the directory */
1386 /*-----------------------------------------------------------------------*/
1390 FATFS_DIR *dj /* Pointer to the directory object linked to the file name */
1399 res = dir_sdi(dj, 0); /* Rewind directory object */
1400 if (res != FR_OK) return res;
1406 res = move_window(dj->fs, dj->sect);
1407 if (res != FR_OK) break;
1408 dir = dj->dir; /* Ptr to the directory entry of current index */
1410 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
1411 #if _USE_LFN /* LFN configuration */
1412 a = dir[DIR_Attr] & AM_MASK;
1413 if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
1416 if (a == AM_LFN) { /* An LFN entry is found */
1418 if (c & LLE) { /* Is it start of LFN sequence? */
1419 sum = dir[LDIR_Chksum];
1420 c &= ~LLE; ord = c; /* LFN start order */
1421 dj->lfn_idx = dj->index;
1423 /* Check validity of the LFN entry and compare it with given name */
1424 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
1426 } else { /* An SFN entry is found */
1427 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
1428 ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1429 if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */
1432 #else /* Non LFN configuration */
1433 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
1436 res = dir_next(dj, 0); /* Next entry */
1437 } while (res == FR_OK);
1445 /*-----------------------------------------------------------------------*/
1446 /* Read an object from the directory */
1447 /*-----------------------------------------------------------------------*/
1448 #if _FS_MINIMIZE <= 1
1451 FATFS_DIR *dj /* Pointer to the directory object that pointing the entry to be read */
1457 BYTE a, ord = 0xFF, sum = 0xFF;
1462 res = move_window(dj->fs, dj->sect);
1463 if (res != FR_OK) break;
1464 dir = dj->dir; /* Ptr to the directory entry of current index */
1466 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
1467 #if _USE_LFN /* LFN configuration */
1468 a = dir[DIR_Attr] & AM_MASK;
1469 if (c == DDE || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
1472 if (a == AM_LFN) { /* An LFN entry is found */
1473 if (c & LLE) { /* Is it start of LFN sequence? */
1474 sum = dir[LDIR_Chksum];
1476 dj->lfn_idx = dj->index;
1478 /* Check LFN validity and capture it */
1479 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
1480 } else { /* An SFN entry is found */
1481 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
1482 dj->lfn_idx = 0xFFFF; /* It has no LFN. */
1486 #else /* Non LFN configuration */
1487 if (c != DDE && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */
1490 res = dir_next(dj, 0); /* Next entry */
1491 if (res != FR_OK) break;
1494 if (res != FR_OK) dj->sect = 0;
1502 /*-----------------------------------------------------------------------*/
1503 /* Register an object to the directory */
1504 /*-----------------------------------------------------------------------*/
1507 FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
1508 FATFS_DIR *dj /* Target directory with object name to be created */
1513 #if _USE_LFN /* LFN configuration */
1515 BYTE sn[12], *fn, sum;
1519 fn = dj->fn; lfn = dj->lfn;
1520 mem_cpy(sn, fn, 12);
1522 if (_FS_RPATH && (sn[NS] & NS_DOT)) /* Cannot create dot entry */
1523 return FR_INVALID_NAME;
1525 if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
1526 fn[NS] = 0; dj->lfn = 0; /* Find only SFN */
1527 for (n = 1; n < 100; n++) {
1528 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
1529 res = dir_find(dj); /* Check if the name collides with existing SFN */
1530 if (res != FR_OK) break;
1532 if (n == 100) return FR_DENIED; /* Abort if too many collisions */
1533 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
1534 fn[NS] = sn[NS]; dj->lfn = lfn;
1537 if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve an SFN + LFN entries. */
1538 for (ne = 0; lfn[ne]; ne++) ;
1539 ne = (ne + 25) / 13;
1540 } else { /* Otherwise reserve only an SFN entry. */
1544 /* Reserve contiguous entries */
1545 res = dir_sdi(dj, 0);
1546 if (res != FR_OK) return res;
1549 res = move_window(dj->fs, dj->sect);
1550 if (res != FR_OK) break;
1551 c = *dj->dir; /* Check the entry status */
1552 if (c == DDE || c == 0) { /* Is it a blank entry? */
1553 if (n == 0) is = dj->index; /* First index of the contiguous entry */
1554 if (++n == ne) break; /* A contiguous entry that required count is found */
1556 n = 0; /* Not a blank entry. Restart to search */
1558 res = dir_next(dj, 1); /* Next entry with table stretch */
1559 } while (res == FR_OK);
1561 if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */
1562 res = dir_sdi(dj, is);
1564 sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */
1566 do { /* Store LFN entries in bottom first */
1567 res = move_window(dj->fs, dj->sect);
1568 if (res != FR_OK) break;
1569 fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
1571 res = dir_next(dj, 0); /* Next entry */
1572 } while (res == FR_OK && --ne);
1576 #else /* Non LFN configuration */
1577 res = dir_sdi(dj, 0);
1579 do { /* Find a blank entry for the SFN */
1580 res = move_window(dj->fs, dj->sect);
1581 if (res != FR_OK) break;
1583 if (c == DDE || c == 0) break; /* Is it a blank entry? */
1584 res = dir_next(dj, 1); /* Next entry with table stretch */
1585 } while (res == FR_OK);
1589 if (res == FR_OK) { /* Initialize the SFN entry */
1590 res = move_window(dj->fs, dj->sect);
1593 mem_set(dir, 0, SZ_DIR); /* Clean the entry */
1594 mem_cpy(dir, dj->fn, 11); /* Put SFN */
1596 dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */
1604 #endif /* !_FS_READONLY */
1609 /*-----------------------------------------------------------------------*/
1610 /* Remove an object from the directory */
1611 /*-----------------------------------------------------------------------*/
1612 #if !_FS_READONLY && !_FS_MINIMIZE
1614 FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */
1615 FATFS_DIR *dj /* Directory object pointing the entry to be removed */
1619 #if _USE_LFN /* LFN configuration */
1622 i = dj->index; /* SFN index */
1623 res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */
1626 res = move_window(dj->fs, dj->sect);
1627 if (res != FR_OK) break;
1628 *dj->dir = DDE; /* Mark the entry "deleted" */
1630 if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
1631 res = dir_next(dj, 0); /* Next entry */
1632 } while (res == FR_OK);
1633 if (res == FR_NO_FILE) res = FR_INT_ERR;
1636 #else /* Non LFN configuration */
1637 res = dir_sdi(dj, dj->index);
1639 res = move_window(dj->fs, dj->sect);
1641 *dj->dir = DDE; /* Mark the entry "deleted" */
1649 #endif /* !_FS_READONLY */
1654 /*-----------------------------------------------------------------------*/
1655 /* Pick a segment and create the object name in directory form */
1656 /*-----------------------------------------------------------------------*/
1659 FRESULT create_name (
1660 FATFS_DIR *dj, /* Pointer to the directory object */
1661 const TCHAR **path /* Pointer to pointer to the segment in the path string */
1665 static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */
1668 #if _USE_LFN /* LFN configuration */
1674 /* Create LFN in Unicode */
1675 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
1679 w = p[si++]; /* Get a character */
1680 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */
1681 if (di >= _MAX_LFN) /* Reject too long name */
1682 return FR_INVALID_NAME;
1685 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
1686 b = (BYTE)p[si++]; /* Get 2nd byte */
1688 return FR_INVALID_NAME; /* Reject invalid sequence */
1689 w = (w << 8) + b; /* Create a DBC */
1691 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */
1692 if (!w) return FR_INVALID_NAME; /* Reject invalid code */
1694 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */
1695 return FR_INVALID_NAME;
1696 lfn[di++] = w; /* Store the Unicode char */
1698 *path = &p[si]; /* Return pointer to the next segment */
1699 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
1701 if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */
1702 (di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) {
1704 for (i = 0; i < 11; i++)
1705 dj->fn[i] = (i < di) ? '.' : ' ';
1706 dj->fn[i] = cf | NS_DOT; /* This is a dot entry */
1710 while (di) { /* Strip trailing spaces and dots */
1712 if (w != ' ' && w != '.') break;
1715 if (!di) return FR_INVALID_NAME; /* Reject nul string */
1717 lfn[di] = 0; /* LFN is created */
1719 /* Create SFN in directory form */
1720 mem_set(dj->fn, ' ', 11);
1721 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
1722 if (si) cf |= NS_LOSS | NS_LFN;
1723 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
1727 w = lfn[si++]; /* Get an LFN char */
1728 if (!w) break; /* Break on end of the LFN */
1729 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
1730 cf |= NS_LOSS | NS_LFN; continue;
1733 if (i >= ni || si == di) { /* Extension or end of SFN */
1734 if (ni == 11) { /* Long extension */
1735 cf |= NS_LOSS | NS_LFN; break;
1737 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
1738 if (si > di) break; /* No extension */
1739 si = di; i = 8; ni = 11; /* Enter extension section */
1743 if (w >= 0x80) { /* Non ASCII char */
1745 w = ff_convert(w, 0); /* Unicode -> OEM code */
1746 if (w) w = excvt[w - 0x80]; /* Convert extended char to upper (SBCS) */
1748 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
1750 cf |= NS_LFN; /* Force create LFN entry */
1753 if (_DF1S && w >= 0x100) { /* Double byte char (always false on SBCS cfg) */
1755 cf |= NS_LOSS | NS_LFN; i = ni; continue;
1757 dj->fn[i++] = (BYTE)(w >> 8);
1758 } else { /* Single byte char */
1759 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal chars for SFN */
1760 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
1762 if (IsUpper(w)) { /* ASCII large capital */
1765 if (IsLower(w)) { /* ASCII small capital */
1771 dj->fn[i++] = (BYTE)w;
1774 if (dj->fn[0] == DDE) dj->fn[0] = NDDE; /* If the first char collides with deleted mark, replace it with 0x05 */
1776 if (ni == 8) b <<= 2;
1777 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
1779 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */
1780 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
1781 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
1784 dj->fn[NS] = cf; /* SFN is created */
1789 #else /* Non-LFN configuration */
1794 /* Create file name in directory form */
1795 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
1797 mem_set(sfn, ' ', 11);
1798 si = i = b = 0; ni = 8;
1800 if (p[si] == '.') { /* Is this a dot entry? */
1803 if (c != '.' || si >= 3) break;
1806 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
1807 *path = &p[si]; /* Return pointer to the next segment */
1808 sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */
1814 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */
1815 if (c == '.' || i >= ni) {
1816 if (ni != 8 || c != '.') return FR_INVALID_NAME;
1820 if (c >= 0x80) { /* Extended char? */
1821 b |= 3; /* Eliminate NT flag */
1823 c = excvt[c - 0x80]; /* Upper conversion (SBCS) */
1825 #if !_DF1S /* ASCII only cfg */
1826 return FR_INVALID_NAME;
1830 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
1831 d = (BYTE)p[si++]; /* Get 2nd byte */
1832 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
1833 return FR_INVALID_NAME;
1836 } else { /* Single byte code */
1837 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */
1838 return FR_INVALID_NAME;
1839 if (IsUpper(c)) { /* ASCII large capital? */
1842 if (IsLower(c)) { /* ASCII small capital? */
1849 *path = &p[si]; /* Return pointer to the next segment */
1850 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
1852 if (!i) return FR_INVALID_NAME; /* Reject nul string */
1853 if (sfn[0] == DDE) sfn[0] = NDDE; /* When first char collides with DDE, replace it with 0x05 */
1855 if (ni == 8) b <<= 2;
1856 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */
1857 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */
1859 sfn[NS] = c; /* Store NT flag, File name is created */
1868 /*-----------------------------------------------------------------------*/
1869 /* Get file information from directory entry */
1870 /*-----------------------------------------------------------------------*/
1871 #if _FS_MINIMIZE <= 1
1873 void get_fileinfo ( /* No return code */
1874 FATFS_DIR *dj, /* Pointer to the directory object */
1875 FILINFO *fno /* Pointer to the file information to be filled */
1886 nt = dir[DIR_NTres]; /* NT flag */
1887 for (i = 0; i < 8; i++) { /* Copy name body */
1889 if (c == ' ') break;
1890 if (c == NDDE) c = (TCHAR)DDE;
1891 if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20;
1893 if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1]))
1894 c = (c << 8) | dir[++i];
1895 c = ff_convert(c, 1);
1900 if (dir[8] != ' ') { /* Copy name extension */
1902 for (i = 8; i < 11; i++) {
1904 if (c == ' ') break;
1905 if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20;
1907 if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1]))
1908 c = (c << 8) | dir[++i];
1909 c = ff_convert(c, 1);
1915 fno->fattrib = dir[DIR_Attr]; /* Attribute */
1916 fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */
1917 fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */
1918 fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */
1920 *p = 0; /* Terminate SFN str by a \0 */
1923 if (fno->lfname && fno->lfsize) {
1924 TCHAR *tp = fno->lfname;
1928 if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
1930 while ((w = *lfn++) != 0) { /* Get an LFN char */
1932 w = ff_convert(w, 0); /* Unicode -> OEM conversion */
1933 if (!w) { i = 0; break; } /* Could not convert, no LFN */
1934 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
1935 tp[i++] = (TCHAR)(w >> 8);
1937 if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overflow, no LFN */
1941 tp[i] = 0; /* Terminate the LFN str by a \0 */
1945 #endif /* _FS_MINIMIZE <= 1 */
1950 /*-----------------------------------------------------------------------*/
1951 /* Follow a file path */
1952 /*-----------------------------------------------------------------------*/
1955 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
1956 FATFS_DIR *dj, /* Directory object to return last directory and found object */
1957 const TCHAR *path /* Full-path string to find a file or directory */
1965 if (*path == '/' || *path == '\\') { /* There is a heading separator */
1966 path++; dj->sclust = 0; /* Strip it and start from the root dir */
1967 } else { /* No heading separator */
1968 dj->sclust = dj->fs->cdir; /* Start from the current dir */
1971 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
1973 dj->sclust = 0; /* Start from the root dir */
1976 if ((UINT)*path < ' ') { /* Nul path means the start directory itself */
1977 res = dir_sdi(dj, 0);
1979 } else { /* Follow path */
1981 res = create_name(dj, &path); /* Get a segment */
1982 if (res != FR_OK) break;
1983 res = dir_find(dj); /* Find it */
1985 if (res != FR_OK) { /* Failed to find the object */
1986 if (res != FR_NO_FILE) break; /* Abort if any hard error occurred */
1987 /* Object not found */
1988 if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exit */
1989 dj->sclust = 0; dj->dir = 0; /* It is the root dir */
1991 if (!(ns & NS_LAST)) continue;
1992 } else { /* Could not find the object */
1993 if (!(ns & NS_LAST)) res = FR_NO_PATH;
1997 if (ns & NS_LAST) break; /* Last segment match. Function completed. */
1998 dir = dj->dir; /* There is next segment. Follow the sub directory */
1999 if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */
2000 res = FR_NO_PATH; break;
2002 dj->sclust = ld_clust(dj->fs, dir);
2012 /*-----------------------------------------------------------------------*/
2013 /* Load a sector and check if it is an FAT Volume Boot Record */
2014 /*-----------------------------------------------------------------------*/
2017 BYTE check_fs ( /* 0:FAT-VBR, 1:Any BR but not FAT, 2:Not a BR, 3:Disk error */
2018 FATFS *fs, /* File system object */
2019 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
2022 if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK) /* Load boot record */
2024 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */
2027 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
2029 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
2038 /*-----------------------------------------------------------------------*/
2039 /* Check if the file system object is valid or not */
2040 /*-----------------------------------------------------------------------*/
2043 FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occurred */
2044 const TCHAR **path, /* Pointer to pointer to the path name (drive number) */
2045 FATFS **rfs, /* Pointer to pointer to the found file system object */
2046 BYTE wmode /* !=0: Check write protection for write access */
2049 BYTE fmt, b, pi, *tbl;
2052 DWORD bsect, fasize, tsect, sysect, nclst, szbfat;
2054 const TCHAR *p = *path;
2058 /* Get logical drive number from the path name */
2059 vol = p[0] - '0'; /* Is there a drive number? */
2060 if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */
2061 p += 2; *path = p; /* Return pointer to the path name */
2062 } else { /* No drive number is given */
2064 vol = CurrVol; /* Use current drive */
2066 vol = 0; /* Use drive 0 */
2070 /* Check if the file system object is valid or not */
2072 if (vol >= _VOLUMES) /* Is the drive number valid? */
2073 return FR_INVALID_DRIVE;
2074 fs = FatFs[vol]; /* Get corresponding file system object */
2075 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
2077 ENTER_FF(fs); /* Lock file system */
2079 *rfs = fs; /* Return pointer to the corresponding file system object */
2080 if (fs->fs_type) { /* If the volume has been mounted */
2081 stat = disk_status(fs->drv);
2082 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */
2083 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */
2084 return FR_WRITE_PROTECTED;
2085 return FR_OK; /* The file system object is valid */
2089 /* The file system object is not valid. */
2090 /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
2092 fs->fs_type = 0; /* Clear the file system object */
2093 fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */
2094 stat = disk_initialize(fs->drv); /* Initialize the physical drive */
2095 if (stat & STA_NOINIT) /* Check if the initialization succeeded */
2096 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
2097 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */
2098 return FR_WRITE_PROTECTED;
2099 #if _MAX_SS != 512 /* Get disk sector size (variable sector size cfg only) */
2100 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK)
2103 /* Search FAT partition on the drive. Supports only generic partitions, FDISK and SFD. */
2104 fmt = check_fs(fs, bsect = 0); /* Load sector 0 and check if it is an FAT-VBR (in SFD) */
2105 if (LD2PT(vol) && !fmt) fmt = 1; /* Force non-SFD if the volume is forced partition */
2106 if (fmt == 1) { /* Not an FAT-VBR, the physical drive can be partitioned */
2107 /* Check the partition listed in the partition table */
2110 tbl = &fs->win[MBR_Table + pi * SZ_PTE];/* Partition table */
2111 if (tbl[4]) { /* Is the partition existing? */
2112 bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */
2113 fmt = check_fs(fs, bsect); /* Check the partition */
2116 if (fmt == 3) return FR_DISK_ERR;
2117 if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */
2119 /* An FAT volume is found. Following code initializes the file system object */
2121 if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */
2122 return FR_NO_FILESYSTEM;
2124 fasize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */
2125 if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32);
2128 fs->n_fats = b = fs->win[BPB_NumFATs]; /* Number of FAT copies */
2129 if (b != 1 && b != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */
2130 fasize *= b; /* Number of sectors for FAT area */
2132 fs->csize = b = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
2133 if (!b || (b & (b - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */
2135 fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Number of root directory entries */
2136 if (fs->n_rootdir % (SS(fs) / SZ_DIR)) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */
2138 tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */
2139 if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
2141 nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); /* Number of reserved sectors */
2142 if (!nrsv) return FR_NO_FILESYSTEM; /* (BPB_RsvdSecCnt must not be 0) */
2144 /* Determine the FAT sub type */
2145 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); /* RSV+FAT+DIR */
2146 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
2147 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
2148 if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
2150 if (nclst >= MIN_FAT16) fmt = FS_FAT16;
2151 if (nclst >= MIN_FAT32) fmt = FS_FAT32;
2153 /* Boundaries and Limits */
2154 fs->n_fatent = nclst + 2; /* Number of FAT entries */
2155 fs->database = bsect + sysect; /* Data start sector */
2156 fs->fatbase = bsect + nrsv; /* FAT start sector */
2157 if (fmt == FS_FAT32) {
2158 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
2159 fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */
2160 szbfat = fs->n_fatent * 4; /* (Required FAT size) */
2162 if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
2163 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
2164 szbfat = (fmt == FS_FAT16) ? /* (Required FAT size) */
2165 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
2167 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than required) */
2168 return FR_NO_FILESYSTEM;
2171 /* Initialize cluster allocation information */
2172 fs->free_clust = 0xFFFFFFFF;
2175 /* Get fsinfo if available */
2176 if (fmt == FS_FAT32) {
2178 fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
2179 if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK &&
2180 LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
2181 LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
2182 LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) {
2183 fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
2184 fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
2188 fs->fs_type = fmt; /* FAT sub-type */
2189 fs->id = ++Fsid; /* File system mount ID */
2190 fs->winsect = 0; /* Invalidate sector cache */
2193 fs->cdir = 0; /* Current directory (root dir) */
2195 #if _FS_LOCK /* Clear file lock semaphores */
2205 /*-----------------------------------------------------------------------*/
2206 /* Check if the file/dir object is valid or not */
2207 /*-----------------------------------------------------------------------*/
2210 FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
2211 void* obj /* Pointer to the object FIL/DIR to check validity */
2217 fil = (FIL*)obj; /* Assuming offset of fs and id in the FIL/DIR is identical */
2218 if (!fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id)
2219 return FR_INVALID_OBJECT;
2221 ENTER_FF(fil->fs); /* Lock file system */
2223 if (disk_status(fil->fs->drv) & STA_NOINIT)
2224 return FR_NOT_READY;
2232 /*--------------------------------------------------------------------------
2236 --------------------------------------------------------------------------*/
2240 /*-----------------------------------------------------------------------*/
2241 /* Mount/Unmount a Logical Drive */
2242 /*-----------------------------------------------------------------------*/
2245 BYTE vol, /* Logical drive number to be mounted/unmounted */
2246 FATFS *fs /* Pointer to new file system object (NULL for unmount)*/
2252 if (vol >= _VOLUMES) /* Check if the drive number is valid */
2253 return FR_INVALID_DRIVE;
2254 rfs = FatFs[vol]; /* Get current fs object */
2260 #if _FS_REENTRANT /* Discard sync object of the current volume */
2261 if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR;
2263 rfs->fs_type = 0; /* Clear old fs object */
2267 fs->fs_type = 0; /* Clear new fs object */
2268 #if _FS_REENTRANT /* Create sync object for the new volume */
2269 if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
2272 FatFs[vol] = fs; /* Register new fs object */
2280 /*-----------------------------------------------------------------------*/
2281 /* Open or Create a File */
2282 /*-----------------------------------------------------------------------*/
2285 FIL *fp, /* Pointer to the blank file object */
2286 const TCHAR *path, /* Pointer to the file name */
2287 BYTE mode /* Access mode and file open mode flags */
2296 if (!fp) return FR_INVALID_OBJECT;
2297 fp->fs = 0; /* Clear file object */
2300 mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
2301 res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ));
2304 res = chk_mounted(&path, &dj.fs, 0);
2308 res = follow_path(&dj, path); /* Follow the file path */
2310 #if !_FS_READONLY /* R/W configuration */
2312 if (!dir) /* Current dir itself */
2313 res = FR_INVALID_NAME;
2316 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2319 /* Create or Open a file */
2320 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
2323 if (res != FR_OK) { /* No file, create new */
2324 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
2326 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
2328 res = dir_register(&dj);
2330 mode |= FA_CREATE_ALWAYS; /* File is created */
2331 dir = dj.dir; /* New entry */
2333 else { /* Any object is already existing */
2334 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */
2337 if (mode & FA_CREATE_NEW) /* Cannot create as new file */
2341 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */
2342 dw = get_fattime(); /* Created time */
2343 ST_DWORD(dir+DIR_CrtTime, dw);
2344 dir[DIR_Attr] = 0; /* Reset attribute */
2345 ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */
2346 cl = ld_clust(dj.fs, dir); /* Get start cluster */
2347 st_clust(dir, 0); /* cluster = 0 */
2349 if (cl) { /* Remove the cluster chain if exist */
2350 dw = dj.fs->winsect;
2351 res = remove_chain(dj.fs, cl);
2353 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
2354 res = move_window(dj.fs, dw);
2359 else { /* Open an existing file */
2360 if (res == FR_OK) { /* Follow succeeded */
2361 if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */
2364 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
2370 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */
2371 mode |= FA__WRITTEN;
2372 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
2375 fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2376 if (!fp->lockid) res = FR_INT_ERR;
2380 #else /* R/O configuration */
2381 if (res == FR_OK) { /* Follow succeeded */
2383 if (!dir) { /* Current dir itself */
2384 res = FR_INVALID_NAME;
2386 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */
2394 fp->flag = mode; /* File access mode */
2395 fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */
2396 fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
2397 fp->fptr = 0; /* File pointer */
2400 fp->cltbl = 0; /* Normal seek mode */
2402 fp->fs = dj.fs; fp->id = dj.fs->id; /* Validate file object */
2406 LEAVE_FF(dj.fs, res);
2412 /*-----------------------------------------------------------------------*/
2414 /*-----------------------------------------------------------------------*/
2417 FIL *fp, /* Pointer to the file object */
2418 void *buff, /* Pointer to data buffer */
2419 UINT btr, /* Number of bytes to read */
2420 UINT *br /* Pointer to number of bytes read */
2424 DWORD clst, sect, remain;
2426 BYTE csect, *rbuff = (BYTE *)buff;
2429 *br = 0; /* Clear read byte counter */
2431 res = validate(fp); /* Check validity */
2432 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2433 if (fp->flag & FA__ERROR) /* Aborted file? */
2434 LEAVE_FF(fp->fs, FR_INT_ERR);
2435 if (!(fp->flag & FA_READ)) /* Check access mode */
2436 LEAVE_FF(fp->fs, FR_DENIED);
2437 remain = fp->fsize - fp->fptr;
2438 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
2440 for ( ; btr; /* Repeat until all data read */
2441 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
2442 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2443 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
2444 if (!csect) { /* On the cluster boundary? */
2445 if (fp->fptr == 0) { /* On the top of the file? */
2446 clst = fp->sclust; /* Follow from the origin */
2447 } else { /* Middle or end of the file */
2450 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
2453 clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */
2455 if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
2456 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2457 fp->clust = clst; /* Update current cluster */
2459 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
2460 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2462 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
2463 if (cc) { /* Read maximum contiguous sectors directly */
2464 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2465 cc = fp->fs->csize - csect;
2466 if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK)
2467 ABORT(fp->fs, FR_DISK_ERR);
2468 #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
2470 if (fp->fs->wflag && fp->fs->winsect - sect < cc)
2471 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
2473 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
2474 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
2477 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
2481 if (fp->dsect != sect) { /* Load data sector if not in cache */
2483 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
2484 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2485 ABORT(fp->fs, FR_DISK_ERR);
2486 fp->flag &= ~FA__DIRTY;
2489 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */
2490 ABORT(fp->fs, FR_DISK_ERR);
2495 rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
2496 if (rcnt > btr) rcnt = btr;
2498 if (move_window(fp->fs, fp->dsect)) /* Move sector window */
2499 ABORT(fp->fs, FR_DISK_ERR);
2500 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
2502 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
2506 LEAVE_FF(fp->fs, FR_OK);
2513 /*-----------------------------------------------------------------------*/
2515 /*-----------------------------------------------------------------------*/
2518 FIL *fp, /* Pointer to the file object */
2519 const void *buff, /* Pointer to the data to be written */
2520 UINT btw, /* Number of bytes to write */
2521 UINT *bw /* Pointer to number of bytes written */
2527 const BYTE *wbuff = (const BYTE *)buff;
2529 bool need_sync = false;
2531 *bw = 0; /* Clear write byte counter */
2533 res = validate(fp); /* Check validity */
2534 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2535 if (fp->flag & FA__ERROR) /* Aborted file? */
2536 LEAVE_FF(fp->fs, FR_INT_ERR);
2537 if (!(fp->flag & FA_WRITE)) /* Check access mode */
2538 LEAVE_FF(fp->fs, FR_DENIED);
2539 if ((DWORD)(fp->fsize + btw) < fp->fsize) btw = 0; /* File size cannot reach 4GB */
2541 for ( ; btw; /* Repeat until all data written */
2542 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
2543 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2544 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
2545 if (!csect) { /* On the cluster boundary? */
2546 if (fp->fptr == 0) { /* On the top of the file? */
2547 clst = fp->sclust; /* Follow from the origin */
2548 if (clst == 0) /* When no cluster is allocated, */
2549 fp->sclust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
2550 } else { /* Middle or end of the file */
2553 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
2556 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */
2558 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
2559 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
2560 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2561 fp->clust = clst; /* Update current cluster */
2563 #ifdef FLUSH_ON_NEW_CLUSTER
2564 // We do not need to flush for the first cluster
2565 if (fp->fptr != 0) {
2571 if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write-back sector cache */
2572 ABORT(fp->fs, FR_DISK_ERR);
2574 if (fp->flag & FA__DIRTY) { /* Write-back sector cache */
2575 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2576 ABORT(fp->fs, FR_DISK_ERR);
2577 fp->flag &= ~FA__DIRTY;
2580 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
2581 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2583 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
2584 if (cc) { /* Write maximum contiguous sectors directly */
2585 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2586 cc = fp->fs->csize - csect;
2587 if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK)
2588 ABORT(fp->fs, FR_DISK_ERR);
2590 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2591 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
2595 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2596 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
2597 fp->flag &= ~FA__DIRTY;
2600 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
2601 #ifdef FLUSH_ON_NEW_SECTOR
2607 if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */
2608 if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR);
2609 fp->fs->winsect = sect;
2612 if (fp->dsect != sect) { /* Fill sector cache with file data */
2613 if (fp->fptr < fp->fsize &&
2614 disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
2615 ABORT(fp->fs, FR_DISK_ERR);
2620 wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
2621 if (wcnt > btw) wcnt = btw;
2623 if (move_window(fp->fs, fp->dsect)) /* Move sector window */
2624 ABORT(fp->fs, FR_DISK_ERR);
2625 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
2628 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
2629 fp->flag |= FA__DIRTY;
2633 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
2634 fp->flag |= FA__WRITTEN; /* Set file change flag */
2640 LEAVE_FF(fp->fs, FR_OK);
2646 /*-----------------------------------------------------------------------*/
2647 /* Synchronize the File Object */
2648 /*-----------------------------------------------------------------------*/
2651 FIL *fp /* Pointer to the file object */
2659 res = validate(fp); /* Check validity of the object */
2661 if (fp->flag & FA__WRITTEN) { /* Has the file been written? */
2662 #if !_FS_TINY /* Write-back dirty buffer */
2663 if (fp->flag & FA__DIRTY) {
2664 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2665 LEAVE_FF(fp->fs, FR_DISK_ERR);
2666 fp->flag &= ~FA__DIRTY;
2669 /* Update the directory entry */
2670 res = move_window(fp->fs, fp->dir_sect);
2673 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
2674 ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */
2675 st_clust(dir, fp->sclust); /* Update start cluster */
2676 tim = get_fattime(); /* Update updated time */
2677 ST_DWORD(dir+DIR_WrtTime, tim);
2678 ST_WORD(dir+DIR_LstAccDate, 0);
2679 fp->flag &= ~FA__WRITTEN;
2686 LEAVE_FF(fp->fs, res);
2689 #endif /* !_FS_READONLY */
2694 /*-----------------------------------------------------------------------*/
2696 /*-----------------------------------------------------------------------*/
2699 FIL *fp /* Pointer to the file object to be closed */
2711 if (res == FR_OK) fp->fs = 0; /* Discard file object */
2715 res = f_sync(fp); /* Flush cached data */
2717 if (res == FR_OK) { /* Decrement open counter */
2719 FATFS *fs = fp->fs;;
2722 res = dec_lock(fp->lockid);
2723 unlock_fs(fs, FR_OK);
2726 res = dec_lock(fp->lockid);
2730 if (res == FR_OK) fp->fs = 0; /* Discard file object */
2738 /*-----------------------------------------------------------------------*/
2739 /* Current Drive/Directory Handlings */
2740 /*-----------------------------------------------------------------------*/
2745 BYTE drv /* Drive number */
2748 if (drv >= _VOLUMES) return FR_INVALID_DRIVE;
2758 const TCHAR *path /* Pointer to the directory path */
2766 res = chk_mounted(&path, &dj.fs, 0);
2769 res = follow_path(&dj, path); /* Follow the path */
2771 if (res == FR_OK) { /* Follow completed */
2773 dj.fs->cdir = dj.sclust; /* Start directory itself */
2775 if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */
2776 dj.fs->cdir = ld_clust(dj.fs, dj.dir);
2778 res = FR_NO_PATH; /* Reached but a file */
2781 if (res == FR_NO_FILE) res = FR_NO_PATH;
2784 LEAVE_FF(dj.fs, res);
2790 TCHAR *path, /* Pointer to the directory path */
2791 UINT sz_path /* Size of path */
2804 res = chk_mounted((const TCHAR**)&path, &dj.fs, 0); /* Get current volume */
2807 i = sz_path; /* Bottom of buffer (dir stack base) */
2808 dj.sclust = dj.fs->cdir; /* Start to follow upper dir from current dir */
2809 while ((ccl = dj.sclust) != 0) { /* Repeat while current dir is a sub-dir */
2810 res = dir_sdi(&dj, 1); /* Get parent dir */
2811 if (res != FR_OK) break;
2812 res = dir_read(&dj);
2813 if (res != FR_OK) break;
2814 dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent dir */
2815 res = dir_sdi(&dj, 0);
2816 if (res != FR_OK) break;
2817 do { /* Find the entry links to the child dir */
2818 res = dir_read(&dj);
2819 if (res != FR_OK) break;
2820 if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */
2821 res = dir_next(&dj, 0);
2822 } while (res == FR_OK);
2823 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
2824 if (res != FR_OK) break;
2829 get_fileinfo(&dj, &fno); /* Get the dir name and push it to the buffer */
2831 if (_USE_LFN && *path) tp = path;
2832 for (n = 0; tp[n]; n++) ;
2834 res = FR_NOT_ENOUGH_CORE; break;
2836 while (n) path[--i] = tp[--n];
2841 *tp++ = '0' + CurrVol; /* Put drive number */
2843 if (i == sz_path) { /* Root-dir */
2845 } else { /* Sub-dir */
2846 do /* Add stacked path str */
2848 while (i < sz_path);
2855 LEAVE_FF(dj.fs, res);
2857 #endif /* _FS_RPATH >= 2 */
2858 #endif /* _FS_RPATH >= 1 */
2862 #if _FS_MINIMIZE <= 2
2863 /*-----------------------------------------------------------------------*/
2864 /* Seek File R/W Pointer */
2865 /*-----------------------------------------------------------------------*/
2868 FIL *fp, /* Pointer to the file object */
2869 DWORD ofs /* File pointer from top of file */
2875 res = validate(fp); /* Check validity of the object */
2876 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2877 if (fp->flag & FA__ERROR) /* Check abort flag */
2878 LEAVE_FF(fp->fs, FR_INT_ERR);
2881 if (fp->cltbl) { /* Fast seek */
2882 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
2884 if (ofs == CREATE_LINKMAP) { /* Create CLMT */
2886 tlen = *tbl++; ulen = 2; /* Given table size and required table size */
2887 cl = fp->sclust; /* Top of the chain */
2890 /* Get a fragment */
2891 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
2894 cl = get_fat(fp->fs, cl);
2895 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
2896 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2897 } while (cl == pcl + 1);
2898 if (ulen <= tlen) { /* Store the length and top of the fragment */
2899 *tbl++ = ncl; *tbl++ = tcl;
2901 } while (cl < fp->fs->n_fatent); /* Repeat until end of chain */
2903 *fp->cltbl = ulen; /* Number of items used */
2905 *tbl = 0; /* Terminate table */
2907 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
2909 } else { /* Fast seek */
2910 if (ofs > fp->fsize) /* Clip offset at the file size */
2912 fp->fptr = ofs; /* Set file pointer */
2914 fp->clust = clmt_clust(fp, ofs - 1);
2915 dsc = clust2sect(fp->fs, fp->clust);
2916 if (!dsc) ABORT(fp->fs, FR_INT_ERR);
2917 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
2918 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */
2921 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
2922 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2923 ABORT(fp->fs, FR_DISK_ERR);
2924 fp->flag &= ~FA__DIRTY;
2927 if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */
2928 ABORT(fp->fs, FR_DISK_ERR);
2939 DWORD clst, bcs, nsect, ifptr;
2941 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
2943 && !(fp->flag & FA_WRITE)
2948 fp->fptr = nsect = 0;
2950 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
2952 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
2953 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
2956 } else { /* When seek to back cluster, */
2957 clst = fp->sclust; /* start from the first cluster */
2959 if (clst == 0) { /* If no cluster chain, create a new chain */
2960 clst = create_chain(fp->fs, 0);
2961 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
2962 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2969 while (ofs > bcs) { /* Cluster following loop */
2971 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
2972 clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */
2973 if (clst == 0) { /* When disk gets full, clip file size */
2978 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
2979 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2980 if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
2986 if (ofs % SS(fp->fs)) {
2987 nsect = clust2sect(fp->fs, clst); /* Current sector */
2988 if (!nsect) ABORT(fp->fs, FR_INT_ERR);
2989 nsect += ofs / SS(fp->fs);
2993 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */
2996 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
2997 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2998 ABORT(fp->fs, FR_DISK_ERR);
2999 fp->flag &= ~FA__DIRTY;
3002 if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */
3003 ABORT(fp->fs, FR_DISK_ERR);
3008 if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */
3009 fp->fsize = fp->fptr;
3010 fp->flag |= FA__WRITTEN;
3015 LEAVE_FF(fp->fs, res);
3020 #if _FS_MINIMIZE <= 1
3021 /*-----------------------------------------------------------------------*/
3022 /* Create a Directory Object */
3023 /*-----------------------------------------------------------------------*/
3026 FATFS_DIR *dj, /* Pointer to directory object to create */
3027 const TCHAR *path /* Pointer to the directory path */
3035 if (!dj) return FR_INVALID_OBJECT;
3037 res = chk_mounted(&path, &dj->fs, 0);
3041 res = follow_path(dj, path); /* Follow the path to the directory */
3043 if (res == FR_OK) { /* Follow completed */
3044 if (dj->dir) { /* It is not the root dir */
3045 if (dj->dir[DIR_Attr] & AM_DIR) { /* The object is a directory */
3046 dj->sclust = ld_clust(fs, dj->dir);
3047 } else { /* The object is not a directory */
3053 res = dir_sdi(dj, 0); /* Rewind dir */
3056 if (res == FR_NO_FILE) res = FR_NO_PATH;
3057 if (res != FR_OK) dj->fs = 0; /* Invalidate the dir object if function faild */
3068 /*-----------------------------------------------------------------------*/
3069 /* Read Directory Entry in Sequence */
3070 /*-----------------------------------------------------------------------*/
3073 FATFS_DIR *dj, /* Pointer to the open directory object */
3074 FILINFO *fno /* Pointer to file information to return */
3081 res = validate(dj); /* Check validity of the object */
3084 res = dir_sdi(dj, 0); /* Rewind the directory object */
3087 res = dir_read(dj); /* Read an directory item */
3088 if (res == FR_NO_FILE) { /* Reached end of dir */
3092 if (res == FR_OK) { /* A valid entry is found */
3093 get_fileinfo(dj, fno); /* Get the object information */
3094 res = dir_next(dj, 0); /* Increment index for next */
3095 if (res == FR_NO_FILE) {
3104 LEAVE_FF(dj->fs, res);
3109 #if _FS_MINIMIZE == 0
3110 /*-----------------------------------------------------------------------*/
3111 /* Get File Status */
3112 /*-----------------------------------------------------------------------*/
3115 const TCHAR *path, /* Pointer to the file path */
3116 FILINFO *fno /* Pointer to file information to return */
3124 res = chk_mounted(&path, &dj.fs, 0);
3127 res = follow_path(&dj, path); /* Follow the file path */
3128 if (res == FR_OK) { /* Follow completed */
3129 if (dj.dir) /* Found an object */
3130 get_fileinfo(&dj, fno);
3131 else /* It is root dir */
3132 res = FR_INVALID_NAME;
3137 LEAVE_FF(dj.fs, res);
3143 /*-----------------------------------------------------------------------*/
3144 /* Get Number of Free Clusters */
3145 /*-----------------------------------------------------------------------*/
3148 const TCHAR *path, /* Pointer to the logical drive number (root dir) */
3149 DWORD *nclst, /* Pointer to the variable to return number of free clusters */
3150 FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */
3155 DWORD n, clst, sect, stat;
3160 /* Get drive number */
3161 res = chk_mounted(&path, fatfs, 0);
3164 /* If free_clust is valid, return it without full cluster scan */
3165 if (fs->free_clust <= fs->n_fatent - 2) {
3166 *nclst = fs->free_clust;
3168 /* Get number of free clusters */
3171 if (fat == FS_FAT12) {
3174 stat = get_fat(fs, clst);
3175 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
3176 if (stat == 1) { res = FR_INT_ERR; break; }
3178 } while (++clst < fs->n_fatent);
3180 clst = fs->n_fatent;
3185 res = move_window(fs, sect++);
3186 if (res != FR_OK) break;
3190 if (fat == FS_FAT16) {
3191 if (LD_WORD(p) == 0) n++;
3194 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
3200 if (fat == FS_FAT32) fs->fsi_flag = 1;
3210 /*-----------------------------------------------------------------------*/
3212 /*-----------------------------------------------------------------------*/
3214 FRESULT f_truncate (
3215 FIL *fp /* Pointer to the file object */
3222 if (!fp) return FR_INVALID_OBJECT;
3224 res = validate(fp); /* Check validity of the object */
3226 if (fp->flag & FA__ERROR) { /* Check abort flag */
3229 if (!(fp->flag & FA_WRITE)) /* Check access mode */
3234 if (fp->fsize > fp->fptr) {
3235 fp->fsize = fp->fptr; /* Set file size to current R/W point */
3236 fp->flag |= FA__WRITTEN;
3237 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
3238 res = remove_chain(fp->fs, fp->sclust);
3240 } else { /* When truncate a part of the file, remove remaining clusters */
3241 ncl = get_fat(fp->fs, fp->clust);
3243 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
3244 if (ncl == 1) res = FR_INT_ERR;
3245 if (res == FR_OK && ncl < fp->fs->n_fatent) {
3246 res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF);
3247 if (res == FR_OK) res = remove_chain(fp->fs, ncl);
3251 if (res != FR_OK) fp->flag |= FA__ERROR;
3254 LEAVE_FF(fp->fs, res);
3260 /*-----------------------------------------------------------------------*/
3261 /* Delete a File or Directory */
3262 /*-----------------------------------------------------------------------*/
3265 const TCHAR *path /* Pointer to the file or directory path */
3275 res = chk_mounted(&path, &dj.fs, 1);
3278 res = follow_path(&dj, path); /* Follow the file path */
3279 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
3280 res = FR_INVALID_NAME; /* Cannot remove dot entry */
3282 if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open file */
3284 if (res == FR_OK) { /* The object is accessible */
3287 res = FR_INVALID_NAME; /* Cannot remove the start directory */
3289 if (dir[DIR_Attr] & AM_RDO)
3290 res = FR_DENIED; /* Cannot remove R/O object */
3292 dclst = ld_clust(dj.fs, dir);
3293 if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */
3297 mem_cpy(&sdj, &dj, sizeof (FATFS_DIR)); /* Check if the sub-dir is empty or not */
3299 res = dir_sdi(&sdj, 2); /* Exclude dot entries */
3301 res = dir_read(&sdj);
3302 if (res == FR_OK /* Not empty dir */
3304 || dclst == dj.fs->cdir /* Current dir */
3307 if (res == FR_NO_FILE) res = FR_OK; /* Empty */
3312 res = dir_remove(&dj); /* Remove the directory entry */
3314 if (dclst) /* Remove the cluster chain if exist */
3315 res = remove_chain(dj.fs, dclst);
3316 if (res == FR_OK) res = sync(dj.fs);
3322 LEAVE_FF(dj.fs, res);
3328 /*-----------------------------------------------------------------------*/
3329 /* Create a Directory */
3330 /*-----------------------------------------------------------------------*/
3333 const TCHAR *path /* Pointer to the directory path */
3339 DWORD dsc, dcl, pcl, tim = get_fattime();
3343 res = chk_mounted(&path, &dj.fs, 1);
3346 res = follow_path(&dj, path); /* Follow the file path */
3347 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */
3348 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT))
3349 res = FR_INVALID_NAME;
3350 if (res == FR_NO_FILE) { /* Can create a new directory */
3351 dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */
3353 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */
3354 if (dcl == 1) res = FR_INT_ERR;
3355 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
3356 if (res == FR_OK) /* Flush FAT */
3357 res = move_window(dj.fs, 0);
3358 if (res == FR_OK) { /* Initialize the new directory table */
3359 dsc = clust2sect(dj.fs, dcl);
3361 mem_set(dir, 0, SS(dj.fs));
3362 mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */
3363 dir[DIR_Name] = '.';
3364 dir[DIR_Attr] = AM_DIR;
3365 ST_DWORD(dir+DIR_WrtTime, tim);
3367 mem_cpy(dir+SZ_DIR, dir, SZ_DIR); /* Create ".." entry */
3368 dir[33] = '.'; pcl = dj.sclust;
3369 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
3371 st_clust(dir+SZ_DIR, pcl);
3372 for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */
3373 dj.fs->winsect = dsc++;
3375 res = move_window(dj.fs, 0);
3376 if (res != FR_OK) break;
3377 mem_set(dir, 0, SS(dj.fs));
3380 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */
3382 remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */
3385 dir[DIR_Attr] = AM_DIR; /* Attribute */
3386 ST_DWORD(dir+DIR_WrtTime, tim); /* Created time */
3387 st_clust(dir, dcl); /* Table start cluster */
3395 LEAVE_FF(dj.fs, res);
3401 /*-----------------------------------------------------------------------*/
3402 /* Change Attribute */
3403 /*-----------------------------------------------------------------------*/
3406 const TCHAR *path, /* Pointer to the file path */
3407 BYTE value, /* Attribute bits */
3408 BYTE mask /* Attribute mask to change */
3417 res = chk_mounted(&path, &dj.fs, 1);
3420 res = follow_path(&dj, path); /* Follow the file path */
3422 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
3423 res = FR_INVALID_NAME;
3426 if (!dir) { /* Is it a root directory? */
3427 res = FR_INVALID_NAME;
3428 } else { /* File or sub directory */
3429 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
3430 dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
3437 LEAVE_FF(dj.fs, res);
3443 /*-----------------------------------------------------------------------*/
3444 /* Change Timestamp */
3445 /*-----------------------------------------------------------------------*/
3448 const TCHAR *path, /* Pointer to the file/directory name */
3449 const FILINFO *fno /* Pointer to the time stamp to be set */
3458 res = chk_mounted(&path, &dj.fs, 1);
3461 res = follow_path(&dj, path); /* Follow the file path */
3463 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
3464 res = FR_INVALID_NAME;
3467 if (!dir) { /* Root directory */
3468 res = FR_INVALID_NAME;
3469 } else { /* File or sub-directory */
3470 ST_WORD(dir+DIR_WrtTime, fno->ftime);
3471 ST_WORD(dir+DIR_WrtDate, fno->fdate);
3478 LEAVE_FF(dj.fs, res);
3484 /*-----------------------------------------------------------------------*/
3485 /* Rename File/Directory */
3486 /*-----------------------------------------------------------------------*/
3489 const TCHAR *path_old, /* Pointer to the old name */
3490 const TCHAR *path_new /* Pointer to the new name */
3500 res = chk_mounted(&path_old, &djo.fs, 1);
3504 res = follow_path(&djo, path_old); /* Check old object */
3505 if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT))
3506 res = FR_INVALID_NAME;
3508 if (res == FR_OK) res = chk_lock(&djo, 2);
3510 if (res == FR_OK) { /* Old object is found */
3511 if (!djo.dir) { /* Is root dir? */
3514 mem_cpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except for name */
3515 mem_cpy(&djn, &djo, sizeof (FATFS_DIR)); /* Check new object */
3516 res = follow_path(&djn, path_new);
3517 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
3518 if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */
3519 /* Start critical section that an interruption or error can cause cross-link */
3520 res = dir_register(&djn); /* Register the new entry */
3522 dir = djn.dir; /* Copy object information except for name */
3523 mem_cpy(dir+13, buf+2, 19);
3524 dir[DIR_Attr] = buf[0] | AM_ARC;
3526 if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) { /* Update .. entry in the directory if needed */
3527 dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
3531 res = move_window(djo.fs, dw);
3532 dir = djo.fs->win+SZ_DIR; /* .. entry */
3533 if (res == FR_OK && dir[1] == '.') {
3534 dw = (djo.fs->fs_type == FS_FAT32 && djn.sclust == djo.fs->dirbase) ? 0 : djn.sclust;
3541 res = dir_remove(&djo); /* Remove old entry */
3546 /* End critical section */
3552 LEAVE_FF(djo.fs, res);
3555 #endif /* !_FS_READONLY */
3556 #endif /* _FS_MINIMIZE == 0 */
3557 #endif /* _FS_MINIMIZE <= 1 */
3558 #endif /* _FS_MINIMIZE <= 2 */
3562 /*-----------------------------------------------------------------------*/
3563 /* Forward data to the stream directly (available on only tiny cfg) */
3564 /*-----------------------------------------------------------------------*/
3565 #if _USE_FORWARD && _FS_TINY
3568 FIL *fp, /* Pointer to the file object */
3569 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
3570 UINT btr, /* Number of bytes to forward */
3571 UINT *bf /* Pointer to number of bytes forwarded */
3575 DWORD remain, clst, sect;
3580 *bf = 0; /* Clear transfer byte counter */
3582 if (!fp) return FR_INVALID_OBJECT;
3584 res = validate(fp); /* Check validity of the object */
3585 if (res != FR_OK) LEAVE_FF(fp->fs, res);
3586 if (fp->flag & FA__ERROR) /* Check error flag */
3587 LEAVE_FF(fp->fs, FR_INT_ERR);
3588 if (!(fp->flag & FA_READ)) /* Check access mode */
3589 LEAVE_FF(fp->fs, FR_DENIED);
3591 remain = fp->fsize - fp->fptr;
3592 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
3594 for ( ; btr && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */
3595 fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) {
3596 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
3597 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
3598 if (!csect) { /* On the cluster boundary? */
3599 clst = (fp->fptr == 0) ? /* On the top of the file? */
3600 fp->sclust : get_fat(fp->fs, fp->clust);
3601 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
3602 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3603 fp->clust = clst; /* Update current cluster */
3606 sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */
3607 if (!sect) ABORT(fp->fs, FR_INT_ERR);
3609 if (move_window(fp->fs, sect)) /* Move sector window */
3610 ABORT(fp->fs, FR_DISK_ERR);
3612 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
3613 if (rcnt > btr) rcnt = btr;
3614 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
3615 if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
3618 LEAVE_FF(fp->fs, FR_OK);
3620 #endif /* _USE_FORWARD */
3624 #if _USE_MKFS && !_FS_READONLY
3625 /*-----------------------------------------------------------------------*/
3626 /* Create File System on the Drive */
3627 /*-----------------------------------------------------------------------*/
3628 #define N_ROOTDIR 512 /* Number of root dir entries for FAT12/16 */
3629 #define N_FATS 1 /* Number of FAT copies (1 or 2) */
3633 BYTE drv, /* Logical drive number */
3634 BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */
3635 UINT au /* Allocation unit size [bytes] */
3638 static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0};
3639 static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
3640 BYTE fmt, md, sys, *tbl, pdrv, part;
3641 DWORD n_clst, vs, n, wsect;
3643 DWORD b_vol, b_fat, b_dir, b_data; /* LBA */
3644 DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */
3649 /* Check mounted drive and clear work area */
3650 if (drv >= _VOLUMES) return FR_INVALID_DRIVE;
3651 if (sfd > 1) return FR_INVALID_PARAMETER;
3652 if (au & (au - 1)) return FR_INVALID_PARAMETER;
3654 if (!fs) return FR_NOT_ENABLED;
3656 pdrv = LD2PD(drv); /* Physical drive */
3657 part = LD2PT(drv); /* Partition (0:auto detect, 1-4:get from partition table)*/
3659 /* Get disk statics */
3660 stat = disk_initialize(pdrv);
3661 if (stat & STA_NOINIT) return FR_NOT_READY;
3662 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
3663 #if _MAX_SS != 512 /* Get disk sector size */
3664 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS)
3667 if (_MULTI_PARTITION && part) {
3668 /* Get partition information from partition table in the MBR */
3669 if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
3670 if (LD_WORD(fs->win+BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
3671 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
3672 if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */
3673 b_vol = LD_DWORD(tbl+8); /* Volume start sector */
3674 n_vol = LD_DWORD(tbl+12); /* Volume size */
3676 /* Create a partition in this function */
3677 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128)
3679 b_vol = (sfd) ? 0 : 63; /* Volume start sector */
3680 n_vol -= b_vol; /* Volume size */
3683 if (!au) { /* AU auto selection */
3684 vs = n_vol / (2000 / (SS(fs) / 512));
3685 for (i = 0; vs < vst[i]; i++) ;
3688 au /= SS(fs); /* Number of sectors per cluster */
3689 if (au == 0) au = 1;
3690 if (au > 128) au = 128;
3692 /* Pre-compute number of clusters and FAT sub-type */
3693 n_clst = n_vol / au;
3695 if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
3696 if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
3698 /* Determine offset and size of FAT structure */
3699 if (fmt == FS_FAT32) {
3700 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
3704 n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
3705 n_fat = (n_fat + SS(fs) - 1) / SS(fs);
3707 n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs);
3709 b_fat = b_vol + n_rsv; /* FAT area start sector */
3710 b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */
3711 b_data = b_dir + n_dir; /* Data area start sector */
3712 if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */
3714 /* Align data start sector to erase block boundary (for flash memory media) */
3715 if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1;
3716 n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */
3717 n = (n - b_data) / N_FATS;
3718 if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */
3721 } else { /* FAT12/16: Expand FAT size */
3725 /* Determine number of clusters and final check of validity of the FAT sub-type */
3726 n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
3727 if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16)
3728 || (fmt == FS_FAT32 && n_clst < MIN_FAT32))
3729 return FR_MKFS_ABORTED;
3731 switch (fmt) { /* Determine system ID for partition table */
3732 case FS_FAT12: sys = 0x01; break;
3733 case FS_FAT16: sys = (n_vol < 0x10000) ? 0x04 : 0x06; break;
3734 default: sys = 0x0C;
3737 if (_MULTI_PARTITION && part) {
3738 /* Update system ID in the partition table */
3739 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
3741 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
3744 if (sfd) { /* No partition table (SFD) */
3746 } else { /* Create partition table (FDISK) */
3747 mem_set(fs->win, 0, SS(fs));
3748 tbl = fs->win+MBR_Table; /* Create partition table for single partition in the drive */
3749 tbl[1] = 1; /* Partition start head */
3750 tbl[2] = 1; /* Partition start sector */
3751 tbl[3] = 0; /* Partition start cylinder */
3752 tbl[4] = sys; /* System type */
3753 tbl[5] = 254; /* Partition end head */
3754 n = (b_vol + n_vol) / 63 / 255;
3755 tbl[6] = (BYTE)((n >> 2) | 63); /* Partition end sector */
3756 tbl[7] = (BYTE)n; /* End cylinder */
3757 ST_DWORD(tbl+8, 63); /* Partition start in LBA */
3758 ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */
3759 ST_WORD(fs->win+BS_55AA, 0xAA55); /* MBR signature */
3760 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR sector */
3766 /* Create BPB in the VBR */
3767 tbl = fs->win; /* Clear sector */
3768 mem_set(tbl, 0, SS(fs));
3769 mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
3770 i = SS(fs); /* Sector size */
3771 ST_WORD(tbl+BPB_BytsPerSec, i);
3772 tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */
3773 ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
3774 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
3775 i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of rootdir entries */
3776 ST_WORD(tbl+BPB_RootEntCnt, i);
3777 if (n_vol < 0x10000) { /* Number of total sectors */
3778 ST_WORD(tbl+BPB_TotSec16, n_vol);
3780 ST_DWORD(tbl+BPB_TotSec32, n_vol);
3782 tbl[BPB_Media] = md; /* Media descriptor */
3783 ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */
3784 ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */
3785 ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */
3786 n = get_fattime(); /* Use current time as VSN */
3787 if (fmt == FS_FAT32) {
3788 ST_DWORD(tbl+BS_VolID32, n); /* VSN */
3789 ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */
3790 ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */
3791 ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (VBR+1) */
3792 ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */
3793 tbl[BS_DrvNum32] = 0x80; /* Drive number */
3794 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
3795 mem_cpy(tbl+BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
3797 ST_DWORD(tbl+BS_VolID, n); /* VSN */
3798 ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */
3799 tbl[BS_DrvNum] = 0x80; /* Drive number */
3800 tbl[BS_BootSig] = 0x29; /* Extended boot signature */
3801 mem_cpy(tbl+BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
3803 ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */
3804 if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */
3806 if (fmt == FS_FAT32) /* Write backup VBR if needed (VBR+6) */
3807 disk_write(pdrv, tbl, b_vol + 6, 1);
3809 /* Initialize FAT area */
3811 for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */
3812 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
3813 n = md; /* Media descriptor byte */
3814 if (fmt != FS_FAT32) {
3815 n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
3816 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */
3819 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */
3820 ST_DWORD(tbl+4, 0xFFFFFFFF);
3821 ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */
3823 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
3825 mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */
3826 for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */
3827 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
3832 /* Initialize root directory */
3833 i = (fmt == FS_FAT32) ? au : n_dir;
3835 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
3839 #if _USE_ERASE /* Erase data area if needed */
3843 eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1;
3844 disk_ioctl(pdrv, CTRL_ERASE_SECTOR, eb);
3848 /* Create FSInfo if needed */
3849 if (fmt == FS_FAT32) {
3850 ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
3851 ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
3852 ST_DWORD(tbl+FSI_Free_Count, n_clst - 1); /* Number of free clusters */
3853 ST_DWORD(tbl+FSI_Nxt_Free, 2); /* Last allocated cluster# */
3854 ST_WORD(tbl+BS_55AA, 0xAA55);
3855 disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR+1) */
3856 disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR+7) */
3859 return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR;
3863 #if _MULTI_PARTITION == 2
3864 /*-----------------------------------------------------------------------*/
3865 /* Divide Physical Drive */
3866 /*-----------------------------------------------------------------------*/
3869 BYTE pdrv, /* Physical drive number */
3870 const DWORD szt[], /* Pointer to the size table for each partitions */
3871 void* work /* Pointer to the working buffer */
3874 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
3875 BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
3877 DWORD sz_disk, sz_part, s_part;
3880 stat = disk_initialize(pdrv);
3881 if (stat & STA_NOINIT) return FR_NOT_READY;
3882 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
3883 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
3885 /* Determine CHS in the table regardless of the drive geometry */
3886 for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
3890 tot_cyl = sz_disk / sz_cyl;
3892 /* Create partition table */
3893 mem_set(buf, 0, _MAX_SS);
3894 p = buf + MBR_Table; b_cyl = 0;
3895 for (i = 0; i < 4; i++, p += SZ_PTE) {
3896 p_cyl = (szt[i] <= 100) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;
3897 if (!p_cyl) continue;
3898 s_part = (DWORD)sz_cyl * b_cyl;
3899 sz_part = (DWORD)sz_cyl * p_cyl;
3900 if (i == 0) { /* Exclude first track of cylinder 0 */
3902 s_part += 63; sz_part -= 63;
3906 e_cyl = b_cyl + p_cyl - 1;
3907 if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
3909 /* Set partition table */
3910 p[1] = s_hd; /* Start head */
3911 p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */
3912 p[3] = (BYTE)b_cyl; /* Start cylinder */
3913 p[4] = 0x06; /* System type (temporary setting) */
3914 p[5] = e_hd; /* End head */
3915 p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */
3916 p[7] = (BYTE)e_cyl; /* End cylinder */
3917 ST_DWORD(p + 8, s_part); /* Start sector in LBA */
3918 ST_DWORD(p + 12, sz_part); /* Partition size */
3920 /* Next partition */
3925 /* Write it to the MBR */
3926 return (disk_write(pdrv, buf, 0, 1) || disk_ioctl(pdrv, CTRL_SYNC, 0)) ? FR_DISK_ERR : FR_OK;
3930 #endif /* _MULTI_PARTITION == 2 */
3931 #endif /* _USE_MKFS && !_FS_READONLY */
3937 /*-----------------------------------------------------------------------*/
3938 /* Get a string from the file */
3939 /*-----------------------------------------------------------------------*/
3941 TCHAR* buff, /* Pointer to the string buffer to read */
3942 int len, /* Size of string buffer (characters) */
3943 FIL* fil /* Pointer to the file object */
3952 while (n < len - 1) { /* Read bytes until buffer gets filled */
3953 f_read(fil, s, 1, &rc);
3954 if (rc != 1) break; /* Break on EOF or error */
3956 #if _LFN_UNICODE /* Read a character in UTF-8 encoding */
3958 if (c < 0xC0) continue; /* Skip stray trailer */
3959 if (c < 0xE0) { /* Two-byte sequence */
3960 f_read(fil, s, 1, &rc);
3962 c = ((c & 0x1F) << 6) | (s[0] & 0x3F);
3963 if (c < 0x80) c = '?';
3965 if (c < 0xF0) { /* Three-byte sequence */
3966 f_read(fil, s, 2, &rc);
3968 c = (c << 12) | ((s[0] & 0x3F) << 6) | (s[1] & 0x3F);
3969 if (c < 0x800) c = '?';
3970 } else { /* Reject four-byte sequence */
3976 #if _USE_STRFUNC >= 2
3977 if (c == '\r') continue; /* Strip '\r' */
3981 if (c == '\n') break; /* Break on EOL */
3984 return n ? buff : 0; /* When no data read (eof or error), return with error. */
3991 /*-----------------------------------------------------------------------*/
3992 /* Put a character to the file */
3993 /*-----------------------------------------------------------------------*/
3995 TCHAR c, /* A character to be output */
3996 FIL* fil /* Pointer to the file object */
4003 #if _USE_STRFUNC >= 2
4004 if (c == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */
4007 #if _LFN_UNICODE /* Write the character in UTF-8 encoding */
4008 if (c < 0x80) { /* 7-bit */
4012 if (c < 0x800) { /* 11-bit */
4013 s[0] = (BYTE)(0xC0 | (c >> 6));
4014 s[1] = (BYTE)(0x80 | (c & 0x3F));
4016 } else { /* 16-bit */
4017 s[0] = (BYTE)(0xE0 | (c >> 12));
4018 s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F));
4019 s[2] = (BYTE)(0x80 | (c & 0x3F));
4023 #else /* Write the character without conversion */
4027 f_write(fil, s, btw, &bw); /* Write the char to the file */
4028 return (bw == btw) ? 1 : EOF; /* Return the result */
4034 /*-----------------------------------------------------------------------*/
4035 /* Put a string to the file */
4036 /*-----------------------------------------------------------------------*/
4038 const TCHAR* str, /* Pointer to the string to be output */
4039 FIL* fil /* Pointer to the file object */
4045 for (n = 0; *str; str++, n++) {
4046 if (f_putc(*str, fil) == EOF) return EOF;
4054 /*-----------------------------------------------------------------------*/
4055 /* Put a formatted string to the file */
4056 /*-----------------------------------------------------------------------*/
4058 FIL* fil, /* Pointer to the file object */
4059 const TCHAR* str, /* Pointer to the format string */
4060 ... /* Optional arguments... */
4067 TCHAR c, d, s[16], *p;
4073 for (cc = res = 0; cc != EOF; res += cc) {
4075 if (c == 0) break; /* End of string */
4076 if (c != '%') { /* Non escape character */
4077 cc = f_putc(c, fil);
4078 if (cc != EOF) cc = 1;
4083 if (c == '0') { /* Flag: '0' padding */
4086 if (c == '-') { /* Flag: left justified */
4090 while (IsDigit(c)) { /* Precision */
4091 w = w * 10 + c - '0';
4094 if (c == 'l' || c == 'L') { /* Prefix: Size is long int */
4099 if (IsLower(d)) d -= 0x20;
4100 switch (d) { /* Type is... */
4101 case 'S' : /* String */
4102 p = va_arg(arp, TCHAR*);
4103 for (j = 0; p[j]; j++) ;
4106 while (j++ < w) chc += (cc = f_putc(' ', fil));
4108 chc += (cc = f_puts(p, fil));
4109 while (j++ < w) chc += (cc = f_putc(' ', fil));
4110 if (cc != EOF) cc = chc;
4112 case 'C' : /* Character */
4113 cc = f_putc((TCHAR)va_arg(arp, int), fil); continue;
4114 case 'B' : /* Binary */
4116 case 'O' : /* Octal */
4118 case 'D' : /* Signed decimal */
4119 case 'U' : /* Unsigned decimal */
4121 case 'X' : /* Hexdecimal */
4123 default: /* Unknown type (pass-through) */
4124 cc = f_putc(c, fil); continue;
4127 /* Get an argument and put it in numeral */
4128 v = (f & 4) ? (ULONG)va_arg(arp, long) : ((d == 'D') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int));
4129 if (d == 'D' && (v & 0x80000000)) {
4135 d = (TCHAR)(v % r); v /= r;
4136 if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
4138 } while (v && i < sizeof s / sizeof s[0]);
4139 if (f & 8) s[i++] = '-';
4140 j = i; d = (f & 1) ? '0' : ' ';
4142 while (!(f & 2) && j++ < w) res += (cc = f_putc(d, fil));
4143 do res += (cc = f_putc(s[--i], fil)); while(i);
4144 while (j++ < w) res += (cc = f_putc(' ', fil));
4145 if (cc != EOF) cc = res;
4149 return (cc == EOF) ? cc : res;
4152 #endif /* !_FS_READONLY */
4153 #endif /* _USE_STRFUNC */