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[pub/lufa.git] / Projects / TempDataLogger / Lib / FATFs / ff.c
1 /*----------------------------------------------------------------------------/
2 / FatFs - FAT file system module R0.08b (C)ChaN, 2011
3 /-----------------------------------------------------------------------------/
4 / FatFs module is a generic FAT file system module for small embedded systems.
5 / This is a free software that opened for education, research and commercial
6 / developments under license policy of following terms.
7 /
8 / Copyright (C) 2011, ChaN, all right reserved.
9 /
10 / * The FatFs module is a free software and there is NO WARRANTY.
11 / * No restriction on use. You can use, modify and redistribute it for
12 / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
13 / * Redistributions of source code must retain the above copyright notice.
14 /
15 /-----------------------------------------------------------------------------/
16 / Feb 26,'06 R0.00 Prototype.
17 /
18 / Apr 29,'06 R0.01 First stable version.
19 /
20 / Jun 01,'06 R0.02 Added FAT12 support.
21 / Removed unbuffered mode.
22 / Fixed a problem on small (<32M) partition.
23 / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
24 /
25 / Sep 22,'06 R0.03 Added f_rename().
26 / Changed option _FS_MINIMUM to _FS_MINIMIZE.
27 / Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast.
28 / Fixed f_mkdir() creates incorrect directory on FAT32.
29 /
30 / Feb 04,'07 R0.04 Supported multiple drive system.
31 / Changed some interfaces for multiple drive system.
32 / Changed f_mountdrv() to f_mount().
33 / Added f_mkfs().
34 / Apr 01,'07 R0.04a Supported multiple partitions on a physical drive.
35 / Added a capability of extending file size to f_lseek().
36 / Added minimization level 3.
37 / Fixed an endian sensitive code in f_mkfs().
38 / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
39 / Added FSInfo support.
40 / Fixed DBCS name can result FR_INVALID_NAME.
41 / Fixed short seek (<= csize) collapses the file object.
42 /
43 / Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs().
44 / Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
45 / Fixed f_mkdir() on FAT32 creates incorrect directory.
46 / Feb 03,'08 R0.05a Added f_truncate() and f_utime().
47 / Fixed off by one error at FAT sub-type determination.
48 / Fixed btr in f_read() can be mistruncated.
49 / Fixed cached sector is not flushed when create and close without write.
50 /
51 / Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets().
52 / Improved performance of f_lseek() on moving to the same or following cluster.
53 /
54 / Apr 01,'09 R0.07 Merged Tiny-FatFs as a configuration option. (_FS_TINY)
55 / Added long file name feature.
56 / Added multiple code page feature.
57 / Added re-entrancy for multitask operation.
58 / Added auto cluster size selection to f_mkfs().
59 / Added rewind option to f_readdir().
60 / Changed result code of critical errors.
61 / Renamed string functions to avoid name collision.
62 / Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
63 / Added multiple sector size feature.
64 / Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
65 / Fixed wrong cache control in f_lseek().
66 / Added relative path feature.
67 / Added f_chdir() and f_chdrive().
68 / Added proper case conversion to extended char.
69 / Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
70 / Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
71 / Fixed name matching error on the 13 char boundary.
72 / Added a configuration option, _LFN_UNICODE.
73 / Changed f_readdir() to return the SFN with always upper case on non-LFN cfg.
74 /
75 / May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN = 3)
76 / Added file lock feature. (_FS_SHARE)
77 / Added fast seek feature. (_USE_FASTSEEK)
78 / Changed some types on the API, XCHAR->TCHAR.
79 / Changed fname member in the FILINFO structure on Unicode cfg.
80 / String functions support UTF-8 encoding files on Unicode cfg.
81 / Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2)
82 / Added sector erase feature. (_USE_ERASE)
83 / Moved file lock semaphore table from fs object to the bss.
84 / Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'.
85 / Fixed f_mkfs() creates wrong FAT32 volume.
86 / Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write().
87 / f_lseek() reports required table size on creating CLMP.
88 / Extended format syntax of f_printf function.
89 / Ignores duplicated directory separators in given path names.
90 /---------------------------------------------------------------------------*/
91
92 #include "ff.h" /* FatFs configurations and declarations */
93 #include "diskio.h" /* Declarations of low level disk I/O functions */
94
95
96 /*--------------------------------------------------------------------------
97
98 Module Private Definitions
99
100 ---------------------------------------------------------------------------*/
101
102 #if _FATFS != 8237
103 #error Wrong include file (ff.h).
104 #endif
105
106
107 /* Definitions on sector size */
108 #if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096
109 #error Wrong sector size.
110 #endif
111 #if _MAX_SS != 512
112 #define SS(fs) ((fs)->ssize) /* Multiple sector size */
113 #else
114 #define SS(fs) 512U /* Fixed sector size */
115 #endif
116
117
118 /* Reentrancy related */
119 #if _FS_REENTRANT
120 #if _USE_LFN == 1
121 #error Static LFN work area must not be used in re-entrant configuration.
122 #endif
123 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
124 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
125 #else
126 #define ENTER_FF(fs)
127 #define LEAVE_FF(fs, res) return res
128 #endif
129
130 #define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
131
132
133 /* File shareing feature */
134 #if _FS_SHARE
135 #if _FS_READONLY
136 #error _FS_SHARE must be 0 on read-only cfg.
137 #endif
138 typedef struct {
139 FATFS *fs; /* File ID 1, volume (NULL:blank entry) */
140 DWORD clu; /* File ID 2, directory */
141 WORD idx; /* File ID 3, directory index */
142 WORD ctr; /* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */
143 } FILESEM;
144 #endif
145
146
147 /* Misc definitions */
148 #define LD_CLUST(dir) (((DWORD)LD_WORD(dir+DIR_FstClusHI)<<16) | LD_WORD(dir+DIR_FstClusLO))
149 #define ST_CLUST(dir,cl) {ST_WORD(dir+DIR_FstClusLO, cl); ST_WORD(dir+DIR_FstClusHI, (DWORD)cl>>16);}
150
151
152 /* DBCS code ranges and SBCS extend char conversion table */
153
154 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */
155 #define _DF1S 0x81 /* DBC 1st byte range 1 start */
156 #define _DF1E 0x9F /* DBC 1st byte range 1 end */
157 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */
158 #define _DF2E 0xFC /* DBC 1st byte range 2 end */
159 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */
160 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */
161 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */
162 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */
163
164 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
165 #define _DF1S 0x81
166 #define _DF1E 0xFE
167 #define _DS1S 0x40
168 #define _DS1E 0x7E
169 #define _DS2S 0x80
170 #define _DS2E 0xFE
171
172 #elif _CODE_PAGE == 949 /* Korean */
173 #define _DF1S 0x81
174 #define _DF1E 0xFE
175 #define _DS1S 0x41
176 #define _DS1E 0x5A
177 #define _DS2S 0x61
178 #define _DS2E 0x7A
179 #define _DS3S 0x81
180 #define _DS3E 0xFE
181
182 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
183 #define _DF1S 0x81
184 #define _DF1E 0xFE
185 #define _DS1S 0x40
186 #define _DS1E 0x7E
187 #define _DS2S 0xA1
188 #define _DS2E 0xFE
189
190 #elif _CODE_PAGE == 437 /* U.S. (OEM) */
191 #define _DF1S 0
192 #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, \
193 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, \
194 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, \
195 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}
196
197 #elif _CODE_PAGE == 720 /* Arabic (OEM) */
198 #define _DF1S 0
199 #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, \
200 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, \
201 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, \
202 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}
203
204 #elif _CODE_PAGE == 737 /* Greek (OEM) */
205 #define _DF1S 0
206 #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, \
207 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, \
208 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, \
209 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}
210
211 #elif _CODE_PAGE == 775 /* Baltic (OEM) */
212 #define _DF1S 0
213 #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, \
214 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, \
215 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, \
216 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}
217
218 #elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */
219 #define _DF1S 0
220 #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, \
221 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, \
222 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, \
223 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}
224
225 #elif _CODE_PAGE == 852 /* Latin 2 (OEM) */
226 #define _DF1S 0
227 #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, \
228 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, \
229 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, \
230 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}
231
232 #elif _CODE_PAGE == 855 /* Cyrillic (OEM) */
233 #define _DF1S 0
234 #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, \
235 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, \
236 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, \
237 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}
238
239 #elif _CODE_PAGE == 857 /* Turkish (OEM) */
240 #define _DF1S 0
241 #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, \
242 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, \
243 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, \
244 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}
245
246 #elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */
247 #define _DF1S 0
248 #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, \
249 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, \
250 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, \
251 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}
252
253 #elif _CODE_PAGE == 862 /* Hebrew (OEM) */
254 #define _DF1S 0
255 #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, \
256 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, \
257 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, \
258 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}
259
260 #elif _CODE_PAGE == 866 /* Russian (OEM) */
261 #define _DF1S 0
262 #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, \
263 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, \
264 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, \
265 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}
266
267 #elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */
268 #define _DF1S 0
269 #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, \
270 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, \
271 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, \
272 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}
273
274 #elif _CODE_PAGE == 1250 /* Central Europe (Windows) */
275 #define _DF1S 0
276 #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, \
277 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, \
278 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, \
279 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}
280
281 #elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */
282 #define _DF1S 0
283 #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, \
284 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, \
285 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, \
286 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}
287
288 #elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */
289 #define _DF1S 0
290 #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, \
291 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, \
292 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, \
293 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}
294
295 #elif _CODE_PAGE == 1253 /* Greek (Windows) */
296 #define _DF1S 0
297 #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, \
298 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, \
299 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, \
300 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}
301
302 #elif _CODE_PAGE == 1254 /* Turkish (Windows) */
303 #define _DF1S 0
304 #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, \
305 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, \
306 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, \
307 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}
308
309 #elif _CODE_PAGE == 1255 /* Hebrew (Windows) */
310 #define _DF1S 0
311 #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, \
312 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, \
313 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, \
314 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}
315
316 #elif _CODE_PAGE == 1256 /* Arabic (Windows) */
317 #define _DF1S 0
318 #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, \
319 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, \
320 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, \
321 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}
322
323 #elif _CODE_PAGE == 1257 /* Baltic (Windows) */
324 #define _DF1S 0
325 #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, \
326 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, \
327 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, \
328 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}
329
330 #elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */
331 #define _DF1S 0
332 #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, \
333 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, \
334 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, \
335 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}
336
337 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
338 #if _USE_LFN
339 #error Cannot use LFN feature without valid code page.
340 #endif
341 #define _DF1S 0
342
343 #else
344 #error Unknown code page
345
346 #endif
347
348
349 /* Character code support macros */
350 #define IsUpper(c) (((c)>='A')&&((c)<='Z'))
351 #define IsLower(c) (((c)>='a')&&((c)<='z'))
352 #define IsDigit(c) (((c)>='0')&&((c)<='9'))
353
354 #if _DF1S /* Code page is DBCS */
355
356 #ifdef _DF2S /* Two 1st byte areas */
357 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
358 #else /* One 1st byte area */
359 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
360 #endif
361
362 #ifdef _DS3S /* Three 2nd byte areas */
363 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
364 #else /* Two 2nd byte areas */
365 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
366 #endif
367
368 #else /* Code page is SBCS */
369
370 #define IsDBCS1(c) 0
371 #define IsDBCS2(c) 0
372
373 #endif /* _DF1S */
374
375
376 /* Name status flags */
377 #define NS 11 /* Index of name status byte in fn[] */
378 #define NS_LOSS 0x01 /* Out of 8.3 format */
379 #define NS_LFN 0x02 /* Force to create LFN entry */
380 #define NS_LAST 0x04 /* Last segment */
381 #define NS_BODY 0x08 /* Lower case flag (body) */
382 #define NS_EXT 0x10 /* Lower case flag (ext) */
383 #define NS_DOT 0x20 /* Dot entry */
384
385
386 /* FAT sub-type boundaries */
387 /* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */
388 #define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */
389 #define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */
390
391
392 /* FatFs refers the members in the FAT structures as byte array instead of
393 / structure member because the structure is not binary compatible between
394 / different platforms */
395
396 #define BS_jmpBoot 0 /* Jump instruction (3) */
397 #define BS_OEMName 3 /* OEM name (8) */
398 #define BPB_BytsPerSec 11 /* Sector size [byte] (2) */
399 #define BPB_SecPerClus 13 /* Cluster size [sector] (1) */
400 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */
401 #define BPB_NumFATs 16 /* Number of FAT copies (1) */
402 #define BPB_RootEntCnt 17 /* Number of root dir entries for FAT12/16 (2) */
403 #define BPB_TotSec16 19 /* Volume size [sector] (2) */
404 #define BPB_Media 21 /* Media descriptor (1) */
405 #define BPB_FATSz16 22 /* FAT size [sector] (2) */
406 #define BPB_SecPerTrk 24 /* Track size [sector] (2) */
407 #define BPB_NumHeads 26 /* Number of heads (2) */
408 #define BPB_HiddSec 28 /* Number of special hidden sectors (4) */
409 #define BPB_TotSec32 32 /* Volume size [sector] (4) */
410 #define BS_DrvNum 36 /* Physical drive number (2) */
411 #define BS_BootSig 38 /* Extended boot signature (1) */
412 #define BS_VolID 39 /* Volume serial number (4) */
413 #define BS_VolLab 43 /* Volume label (8) */
414 #define BS_FilSysType 54 /* File system type (1) */
415 #define BPB_FATSz32 36 /* FAT size [sector] (4) */
416 #define BPB_ExtFlags 40 /* Extended flags (2) */
417 #define BPB_FSVer 42 /* File system version (2) */
418 #define BPB_RootClus 44 /* Root dir first cluster (4) */
419 #define BPB_FSInfo 48 /* Offset of FSInfo sector (2) */
420 #define BPB_BkBootSec 50 /* Offset of backup boot sectot (2) */
421 #define BS_DrvNum32 64 /* Physical drive number (2) */
422 #define BS_BootSig32 66 /* Extended boot signature (1) */
423 #define BS_VolID32 67 /* Volume serial number (4) */
424 #define BS_VolLab32 71 /* Volume label (8) */
425 #define BS_FilSysType32 82 /* File system type (1) */
426 #define FSI_LeadSig 0 /* FSI: Leading signature (4) */
427 #define FSI_StrucSig 484 /* FSI: Structure signature (4) */
428 #define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */
429 #define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */
430 #define MBR_Table 446 /* MBR: Partition table offset (2) */
431 #define SZ_PTE 16 /* MBR: Size of a partition table entry */
432 #define BS_55AA 510 /* Boot sector signature (2) */
433
434 #define DIR_Name 0 /* Short file name (11) */
435 #define DIR_Attr 11 /* Attribute (1) */
436 #define DIR_NTres 12 /* NT flag (1) */
437 #define DIR_CrtTime 14 /* Created time (2) */
438 #define DIR_CrtDate 16 /* Created date (2) */
439 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */
440 #define DIR_WrtTime 22 /* Modified time (2) */
441 #define DIR_WrtDate 24 /* Modified date (2) */
442 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */
443 #define DIR_FileSize 28 /* File size (4) */
444 #define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */
445 #define LDIR_Attr 11 /* LFN attribute (1) */
446 #define LDIR_Type 12 /* LFN type (1) */
447 #define LDIR_Chksum 13 /* Sum of corresponding SFN entry */
448 #define LDIR_FstClusLO 26 /* Filled by zero (0) */
449 #define SZ_DIR 32 /* Size of a directory entry */
450 #define LLE 0x40 /* Last long entry flag in LDIR_Ord */
451 #define DDE 0xE5 /* Deleted directory enrty mark in DIR_Name[0] */
452 #define NDDE 0x05 /* Replacement of a character collides with DDE */
453
454
455 /*------------------------------------------------------------*/
456 /* Work area */
457
458 #if _VOLUMES
459 static
460 FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */
461 #else
462 #error Number of drives must not be 0.
463 #endif
464
465 static
466 WORD Fsid; /* File system mount ID */
467
468 #if _FS_RPATH
469 static
470 BYTE CurrVol; /* Current drive */
471 #endif
472
473 #if _FS_SHARE
474 static
475 FILESEM Files[_FS_SHARE]; /* File lock semaphores */
476 #endif
477
478 #if _USE_LFN == 0 /* No LFN */
479 #define DEF_NAMEBUF BYTE sfn[12]
480 #define INIT_BUF(dobj) (dobj).fn = sfn
481 #define FREE_BUF()
482
483 #elif _USE_LFN == 1 /* LFN with static LFN working buffer */
484 static WCHAR LfnBuf[_MAX_LFN+1];
485 #define DEF_NAMEBUF BYTE sfn[12]
486 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
487 #define FREE_BUF()
488
489 #elif _USE_LFN == 2 /* LFN with dynamic LFN working buffer on the stack */
490 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1]
491 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; }
492 #define FREE_BUF()
493
494 #elif _USE_LFN == 3 /* LFN with dynamic LFN working buffer on the heap */
495 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn
496 #define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \
497 if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \
498 (dobj).lfn = lfn; (dobj).fn = sfn; }
499 #define FREE_BUF() ff_memfree(lfn)
500
501 #else
502 #error Wrong LFN configuration.
503 #endif
504
505
506
507
508 /*--------------------------------------------------------------------------
509
510 Module Private Functions
511
512 ---------------------------------------------------------------------------*/
513
514
515 /*-----------------------------------------------------------------------*/
516 /* String functions */
517 /*-----------------------------------------------------------------------*/
518
519 /* Copy memory to memory */
520 static
521 void mem_cpy (void* dst, const void* src, UINT cnt) {
522 BYTE *d = (BYTE*)dst;
523 const BYTE *s = (const BYTE*)src;
524
525 #if _WORD_ACCESS == 1
526 while (cnt >= sizeof(int)) {
527 *(int*)d = *(int*)s;
528 d += sizeof(int); s += sizeof(int);
529 cnt -= sizeof(int);
530 }
531 #endif
532 while (cnt--)
533 *d++ = *s++;
534 }
535
536 /* Fill memory */
537 static
538 void mem_set (void* dst, int val, UINT cnt) {
539 BYTE *d = (BYTE*)dst;
540
541 while (cnt--)
542 *d++ = (BYTE)val;
543 }
544
545 /* Compare memory to memory */
546 static
547 int mem_cmp (const void* dst, const void* src, UINT cnt) {
548 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
549 int r = 0;
550
551 while (cnt-- && (r = *d++ - *s++) == 0) ;
552 return r;
553 }
554
555 /* Check if chr is contained in the string */
556 static
557 int chk_chr (const char* str, int chr) {
558 while (*str && *str != chr) str++;
559 return *str;
560 }
561
562
563
564 /*-----------------------------------------------------------------------*/
565 /* Request/Release grant to access the volume */
566 /*-----------------------------------------------------------------------*/
567 #if _FS_REENTRANT
568
569 static
570 int lock_fs (
571 FATFS *fs /* File system object */
572 )
573 {
574 return ff_req_grant(fs->sobj);
575 }
576
577
578 static
579 void unlock_fs (
580 FATFS *fs, /* File system object */
581 FRESULT res /* Result code to be returned */
582 )
583 {
584 if (res != FR_NOT_ENABLED &&
585 res != FR_INVALID_DRIVE &&
586 res != FR_INVALID_OBJECT &&
587 res != FR_TIMEOUT) {
588 ff_rel_grant(fs->sobj);
589 }
590 }
591 #endif
592
593
594
595 /*-----------------------------------------------------------------------*/
596 /* File shareing control functions */
597 /*-----------------------------------------------------------------------*/
598 #if _FS_SHARE
599
600 static
601 FRESULT chk_lock ( /* Check if the file can be accessed */
602 DIR* dj, /* Directory object pointing the file to be checked */
603 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
604 )
605 {
606 UINT i, be;
607
608 /* Search file semaphore table */
609 for (i = be = 0; i < _FS_SHARE; i++) {
610 if (Files[i].fs) { /* Existing entry */
611 if (Files[i].fs == dj->fs && /* Check if the file matched with an open file */
612 Files[i].clu == dj->sclust &&
613 Files[i].idx == dj->index) break;
614 } else { /* Blank entry */
615 be++;
616 }
617 }
618 if (i == _FS_SHARE) /* The file is not opened */
619 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new file? */
620
621 /* The file has been opened. Reject any open against writing file and all write mode open */
622 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
623 }
624
625
626 static
627 int enq_lock ( /* Check if an entry is available for a new file */
628 FATFS* fs /* File system object */
629 )
630 {
631 UINT i;
632
633 for (i = 0; i < _FS_SHARE && Files[i].fs; i++) ;
634 return (i == _FS_SHARE) ? 0 : 1;
635 }
636
637
638 static
639 UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */
640 DIR* dj, /* Directory object pointing the file to register or increment */
641 int acc /* Desired access mode (0:Read, !0:Write) */
642 )
643 {
644 UINT i;
645
646
647 for (i = 0; i < _FS_SHARE; i++) { /* Find the file */
648 if (Files[i].fs == dj->fs &&
649 Files[i].clu == dj->sclust &&
650 Files[i].idx == dj->index) break;
651 }
652
653 if (i == _FS_SHARE) { /* Not opened. Register it as new. */
654 for (i = 0; i < _FS_SHARE && Files[i].fs; i++) ;
655 if (i == _FS_SHARE) return 0; /* No space to register (int err) */
656 Files[i].fs = dj->fs;
657 Files[i].clu = dj->sclust;
658 Files[i].idx = dj->index;
659 Files[i].ctr = 0;
660 }
661
662 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */
663
664 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
665
666 return i + 1;
667 }
668
669
670 static
671 FRESULT dec_lock ( /* Decrement file open counter */
672 UINT i /* Semaphore index */
673 )
674 {
675 WORD n;
676 FRESULT res;
677
678
679 if (--i < _FS_SHARE) {
680 n = Files[i].ctr;
681 if (n == 0x100) n = 0;
682 if (n) n--;
683 Files[i].ctr = n;
684 if (!n) Files[i].fs = 0;
685 res = FR_OK;
686 } else {
687 res = FR_INT_ERR;
688 }
689 return res;
690 }
691
692
693 static
694 void clear_lock ( /* Clear lock entries of the volume */
695 FATFS *fs
696 )
697 {
698 UINT i;
699
700 for (i = 0; i < _FS_SHARE; i++) {
701 if (Files[i].fs == fs) Files[i].fs = 0;
702 }
703 }
704 #endif
705
706
707
708 /*-----------------------------------------------------------------------*/
709 /* Change window offset */
710 /*-----------------------------------------------------------------------*/
711
712 static
713 FRESULT move_window (
714 FATFS *fs, /* File system object */
715 DWORD sector /* Sector number to make appearance in the fs->win[] */
716 ) /* Move to zero only writes back dirty window */
717 {
718 DWORD wsect;
719
720
721 wsect = fs->winsect;
722 if (wsect != sector) { /* Changed current window */
723 #if !_FS_READONLY
724 if (fs->wflag) { /* Write back dirty window if needed */
725 if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK)
726 return FR_DISK_ERR;
727 fs->wflag = 0;
728 if (wsect < (fs->fatbase + fs->fsize)) { /* In FAT area */
729 BYTE nf;
730 for (nf = fs->n_fats; nf > 1; nf--) { /* Reflect the change to all FAT copies */
731 wsect += fs->fsize;
732 disk_write(fs->drv, fs->win, wsect, 1);
733 }
734 }
735 }
736 #endif
737 if (sector) {
738 if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK)
739 return FR_DISK_ERR;
740 fs->winsect = sector;
741 }
742 }
743
744 return FR_OK;
745 }
746
747
748
749
750 /*-----------------------------------------------------------------------*/
751 /* Clean-up cached data */
752 /*-----------------------------------------------------------------------*/
753 #if !_FS_READONLY
754 static
755 FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */
756 FATFS *fs /* File system object */
757 )
758 {
759 FRESULT res;
760
761
762 res = move_window(fs, 0);
763 if (res == FR_OK) {
764 /* Update FSInfo sector if needed */
765 if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
766 fs->winsect = 0;
767 /* Create FSInfo structure */
768 mem_set(fs->win, 0, 512);
769 ST_WORD(fs->win+BS_55AA, 0xAA55);
770 ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
771 ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
772 ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
773 ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
774 /* Write it into the FSInfo sector */
775 disk_write(fs->drv, fs->win, fs->fsi_sector, 1);
776 fs->fsi_flag = 0;
777 }
778 /* Make sure that no pending write process in the physical drive */
779 if (disk_ioctl(fs->drv, CTRL_SYNC, (void*)0) != RES_OK)
780 res = FR_DISK_ERR;
781 }
782
783 return res;
784 }
785 #endif
786
787
788
789
790 /*-----------------------------------------------------------------------*/
791 /* Get sector# from cluster# */
792 /*-----------------------------------------------------------------------*/
793
794
795 DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
796 FATFS *fs, /* File system object */
797 DWORD clst /* Cluster# to be converted */
798 )
799 {
800 clst -= 2;
801 if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */
802 return clst * fs->csize + fs->database;
803 }
804
805
806
807
808 /*-----------------------------------------------------------------------*/
809 /* FAT access - Read value of a FAT entry */
810 /*-----------------------------------------------------------------------*/
811
812
813 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */
814 FATFS *fs, /* File system object */
815 DWORD clst /* Cluster# to get the link information */
816 )
817 {
818 UINT wc, bc;
819 BYTE *p;
820
821
822 if (clst < 2 || clst >= fs->n_fatent) /* Chack range */
823 return 1;
824
825 switch (fs->fs_type) {
826 case FS_FAT12 :
827 bc = (UINT)clst; bc += bc / 2;
828 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
829 wc = fs->win[bc % SS(fs)]; bc++;
830 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
831 wc |= fs->win[bc % SS(fs)] << 8;
832 return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
833
834 case FS_FAT16 :
835 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break;
836 p = &fs->win[clst * 2 % SS(fs)];
837 return LD_WORD(p);
838
839 case FS_FAT32 :
840 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break;
841 p = &fs->win[clst * 4 % SS(fs)];
842 return LD_DWORD(p) & 0x0FFFFFFF;
843 }
844
845 return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */
846 }
847
848
849
850
851 /*-----------------------------------------------------------------------*/
852 /* FAT access - Change value of a FAT entry */
853 /*-----------------------------------------------------------------------*/
854 #if !_FS_READONLY
855
856 FRESULT put_fat (
857 FATFS *fs, /* File system object */
858 DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */
859 DWORD val /* New value to mark the cluster */
860 )
861 {
862 UINT bc;
863 BYTE *p;
864 FRESULT res;
865
866
867 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
868 res = FR_INT_ERR;
869
870 } else {
871 switch (fs->fs_type) {
872 case FS_FAT12 :
873 bc = clst; bc += bc / 2;
874 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
875 if (res != FR_OK) break;
876 p = &fs->win[bc % SS(fs)];
877 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
878 bc++;
879 fs->wflag = 1;
880 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
881 if (res != FR_OK) break;
882 p = &fs->win[bc % SS(fs)];
883 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
884 break;
885
886 case FS_FAT16 :
887 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
888 if (res != FR_OK) break;
889 p = &fs->win[clst * 2 % SS(fs)];
890 ST_WORD(p, (WORD)val);
891 break;
892
893 case FS_FAT32 :
894 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
895 if (res != FR_OK) break;
896 p = &fs->win[clst * 4 % SS(fs)];
897 val |= LD_DWORD(p) & 0xF0000000;
898 ST_DWORD(p, val);
899 break;
900
901 default :
902 res = FR_INT_ERR;
903 }
904 fs->wflag = 1;
905 }
906
907 return res;
908 }
909 #endif /* !_FS_READONLY */
910
911
912
913
914 /*-----------------------------------------------------------------------*/
915 /* FAT handling - Remove a cluster chain */
916 /*-----------------------------------------------------------------------*/
917 #if !_FS_READONLY
918 static
919 FRESULT remove_chain (
920 FATFS *fs, /* File system object */
921 DWORD clst /* Cluster# to remove a chain from */
922 )
923 {
924 FRESULT res;
925 DWORD nxt;
926 #if _USE_ERASE
927 DWORD scl = clst, ecl = clst, resion[2];
928 #endif
929
930 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
931 res = FR_INT_ERR;
932
933 } else {
934 res = FR_OK;
935 while (clst < fs->n_fatent) { /* Not a last link? */
936 nxt = get_fat(fs, clst); /* Get cluster status */
937 if (nxt == 0) break; /* Empty cluster? */
938 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
939 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
940 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
941 if (res != FR_OK) break;
942 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */
943 fs->free_clust++;
944 fs->fsi_flag = 1;
945 }
946 #if _USE_ERASE
947 if (ecl + 1 == nxt) { /* Next cluster is contiguous */
948 ecl = nxt;
949 } else { /* End of contiguous clusters */
950 resion[0] = clust2sect(fs, scl); /* Start sector */
951 resion[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */
952 disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, resion); /* Erase the block */
953 scl = ecl = nxt;
954 }
955 #endif
956 clst = nxt; /* Next cluster */
957 }
958 }
959
960 return res;
961 }
962 #endif
963
964
965
966
967 /*-----------------------------------------------------------------------*/
968 /* FAT handling - Stretch or Create a cluster chain */
969 /*-----------------------------------------------------------------------*/
970 #if !_FS_READONLY
971 static
972 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
973 FATFS *fs, /* File system object */
974 DWORD clst /* Cluster# to stretch. 0 means create a new chain. */
975 )
976 {
977 DWORD cs, ncl, scl;
978 FRESULT res;
979
980
981 if (clst == 0) { /* Create a new chain */
982 scl = fs->last_clust; /* Get suggested start point */
983 if (!scl || scl >= fs->n_fatent) scl = 1;
984 }
985 else { /* Stretch the current chain */
986 cs = get_fat(fs, clst); /* Check the cluster status */
987 if (cs < 2) return 1; /* It is an invalid cluster */
988 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
989 scl = clst;
990 }
991
992 ncl = scl; /* Start cluster */
993 for (;;) {
994 ncl++; /* Next cluster */
995 if (ncl >= fs->n_fatent) { /* Wrap around */
996 ncl = 2;
997 if (ncl > scl) return 0; /* No free cluster */
998 }
999 cs = get_fat(fs, ncl); /* Get the cluster status */
1000 if (cs == 0) break; /* Found a free cluster */
1001 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */
1002 return cs;
1003 if (ncl == scl) return 0; /* No free cluster */
1004 }
1005
1006 res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */
1007 if (res == FR_OK && clst != 0) {
1008 res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */
1009 }
1010 if (res == FR_OK) {
1011 fs->last_clust = ncl; /* Update FSINFO */
1012 if (fs->free_clust != 0xFFFFFFFF) {
1013 fs->free_clust--;
1014 fs->fsi_flag = 1;
1015 }
1016 } else {
1017 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
1018 }
1019
1020 return ncl; /* Return new cluster number or error code */
1021 }
1022 #endif /* !_FS_READONLY */
1023
1024
1025
1026 /*-----------------------------------------------------------------------*/
1027 /* FAT handling - Convert offset into cluster with link map table */
1028 /*-----------------------------------------------------------------------*/
1029
1030 #if _USE_FASTSEEK
1031 static
1032 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
1033 FIL* fp, /* Pointer to the file object */
1034 DWORD ofs /* File offset to be converted to cluster# */
1035 )
1036 {
1037 DWORD cl, ncl, *tbl;
1038
1039
1040 tbl = fp->cltbl + 1; /* Top of CLMT */
1041 cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */
1042 for (;;) {
1043 ncl = *tbl++; /* Number of cluters in the fragment */
1044 if (!ncl) return 0; /* End of table? (error) */
1045 if (cl < ncl) break; /* In this fragment? */
1046 cl -= ncl; tbl++; /* Next fragment */
1047 }
1048 return cl + *tbl; /* Return the cluster number */
1049 }
1050 #endif /* _USE_FASTSEEK */
1051
1052
1053
1054 /*-----------------------------------------------------------------------*/
1055 /* Directory handling - Set directory index */
1056 /*-----------------------------------------------------------------------*/
1057
1058 static
1059 FRESULT dir_sdi (
1060 DIR *dj, /* Pointer to directory object */
1061 WORD idx /* Directory index number */
1062 )
1063 {
1064 DWORD clst;
1065 WORD ic;
1066
1067
1068 dj->index = idx;
1069 clst = dj->sclust;
1070 if (clst == 1 || clst >= dj->fs->n_fatent) /* Check start cluster range */
1071 return FR_INT_ERR;
1072 if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
1073 clst = dj->fs->dirbase;
1074
1075 if (clst == 0) { /* Static table (root-dir in FAT12/16) */
1076 dj->clust = clst;
1077 if (idx >= dj->fs->n_rootdir) /* Index is out of range */
1078 return FR_INT_ERR;
1079 dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */
1080 }
1081 else { /* Dynamic table (sub-dirs or root-dir in FAT32) */
1082 ic = SS(dj->fs) / SZ_DIR * dj->fs->csize; /* Entries per cluster */
1083 while (idx >= ic) { /* Follow cluster chain */
1084 clst = get_fat(dj->fs, clst); /* Get next cluster */
1085 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1086 if (clst < 2 || clst >= dj->fs->n_fatent) /* Reached to end of table or int error */
1087 return FR_INT_ERR;
1088 idx -= ic;
1089 }
1090 dj->clust = clst;
1091 dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */
1092 }
1093
1094 dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */
1095
1096 return FR_OK; /* Seek succeeded */
1097 }
1098
1099
1100
1101
1102 /*-----------------------------------------------------------------------*/
1103 /* Directory handling - Move directory index next */
1104 /*-----------------------------------------------------------------------*/
1105
1106 static
1107 FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */
1108 DIR *dj, /* Pointer to directory object */
1109 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
1110 )
1111 {
1112 DWORD clst;
1113 WORD i;
1114
1115
1116 i = dj->index + 1;
1117 if (!i || !dj->sect) /* Report EOT when index has reached 65535 */
1118 return FR_NO_FILE;
1119
1120 if (!(i % (SS(dj->fs) / SZ_DIR))) { /* Sector changed? */
1121 dj->sect++; /* Next sector */
1122
1123 if (dj->clust == 0) { /* Static table */
1124 if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */
1125 return FR_NO_FILE;
1126 }
1127 else { /* Dynamic table */
1128 if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
1129 clst = get_fat(dj->fs, dj->clust); /* Get next cluster */
1130 if (clst <= 1) return FR_INT_ERR;
1131 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1132 if (clst >= dj->fs->n_fatent) { /* When it reached end of dynamic table */
1133 #if !_FS_READONLY
1134 BYTE c;
1135 if (!stretch) return FR_NO_FILE; /* When do not stretch, report EOT */
1136 clst = create_chain(dj->fs, dj->clust); /* Stretch cluster chain */
1137 if (clst == 0) return FR_DENIED; /* No free cluster */
1138 if (clst == 1) return FR_INT_ERR;
1139 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1140 /* Clean-up stretched table */
1141 if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */
1142 mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */
1143 dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */
1144 for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */
1145 dj->fs->wflag = 1;
1146 if (move_window(dj->fs, 0)) return FR_DISK_ERR;
1147 dj->fs->winsect++;
1148 }
1149 dj->fs->winsect -= c; /* Rewind window address */
1150 #else
1151 return FR_NO_FILE; /* Report EOT */
1152 #endif
1153 }
1154 dj->clust = clst; /* Initialize data for new cluster */
1155 dj->sect = clust2sect(dj->fs, clst);
1156 }
1157 }
1158 }
1159
1160 dj->index = i;
1161 dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR;
1162
1163 return FR_OK;
1164 }
1165
1166
1167
1168
1169 /*-----------------------------------------------------------------------*/
1170 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
1171 /*-----------------------------------------------------------------------*/
1172 #if _USE_LFN
1173 static
1174 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */
1175
1176
1177 static
1178 int cmp_lfn ( /* 1:Matched, 0:Not matched */
1179 WCHAR *lfnbuf, /* Pointer to the LFN to be compared */
1180 BYTE *dir /* Pointer to the directory entry containing a part of LFN */
1181 )
1182 {
1183 UINT i, s;
1184 WCHAR wc, uc;
1185
1186
1187 i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13; /* Get offset in the LFN buffer */
1188 s = 0; wc = 1;
1189 do {
1190 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
1191 if (wc) { /* Last char has not been processed */
1192 wc = ff_wtoupper(uc); /* Convert it to upper case */
1193 if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */
1194 return 0; /* Not matched */
1195 } else {
1196 if (uc != 0xFFFF) return 0; /* Check filler */
1197 }
1198 } while (++s < 13); /* Repeat until all chars in the entry are checked */
1199
1200 if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i]) /* Last segment matched but different length */
1201 return 0;
1202
1203 return 1; /* The part of LFN matched */
1204 }
1205
1206
1207
1208 static
1209 int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */
1210 WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */
1211 BYTE *dir /* Pointer to the directory entry */
1212 )
1213 {
1214 UINT i, s;
1215 WCHAR wc, uc;
1216
1217
1218 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1219
1220 s = 0; wc = 1;
1221 do {
1222 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
1223 if (wc) { /* Last char has not been processed */
1224 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
1225 lfnbuf[i++] = wc = uc; /* Store it */
1226 } else {
1227 if (uc != 0xFFFF) return 0; /* Check filler */
1228 }
1229 } while (++s < 13); /* Read all character in the entry */
1230
1231 if (dir[LDIR_Ord] & LLE) { /* Put terminator if it is the last LFN part */
1232 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
1233 lfnbuf[i] = 0;
1234 }
1235
1236 return 1;
1237 }
1238
1239
1240 #if !_FS_READONLY
1241 static
1242 void fit_lfn (
1243 const WCHAR *lfnbuf, /* Pointer to the LFN buffer */
1244 BYTE *dir, /* Pointer to the directory entry */
1245 BYTE ord, /* LFN order (1-20) */
1246 BYTE sum /* SFN sum */
1247 )
1248 {
1249 UINT i, s;
1250 WCHAR wc;
1251
1252
1253 dir[LDIR_Chksum] = sum; /* Set check sum */
1254 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
1255 dir[LDIR_Type] = 0;
1256 ST_WORD(dir+LDIR_FstClusLO, 0);
1257
1258 i = (ord - 1) * 13; /* Get offset in the LFN buffer */
1259 s = wc = 0;
1260 do {
1261 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */
1262 ST_WORD(dir+LfnOfs[s], wc); /* Put it */
1263 if (!wc) wc = 0xFFFF; /* Padding chars following last char */
1264 } while (++s < 13);
1265 if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE; /* Bottom LFN part is the start of LFN sequence */
1266 dir[LDIR_Ord] = ord; /* Set the LFN order */
1267 }
1268
1269 #endif
1270 #endif
1271
1272
1273
1274 /*-----------------------------------------------------------------------*/
1275 /* Create numbered name */
1276 /*-----------------------------------------------------------------------*/
1277 #if _USE_LFN
1278 void gen_numname (
1279 BYTE *dst, /* Pointer to generated SFN */
1280 const BYTE *src, /* Pointer to source SFN to be modified */
1281 const WCHAR *lfn, /* Pointer to LFN */
1282 WORD seq /* Sequence number */
1283 )
1284 {
1285 BYTE ns[8], c;
1286 UINT i, j;
1287
1288
1289 mem_cpy(dst, src, 11);
1290
1291 if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */
1292 do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; while (*lfn);
1293 }
1294
1295 /* itoa (hexdecimal) */
1296 i = 7;
1297 do {
1298 c = (seq % 16) + '0';
1299 if (c > '9') c += 7;
1300 ns[i--] = c;
1301 seq /= 16;
1302 } while (seq);
1303 ns[i] = '~';
1304
1305 /* Append the number */
1306 for (j = 0; j < i && dst[j] != ' '; j++) {
1307 if (IsDBCS1(dst[j])) {
1308 if (j == i - 1) break;
1309 j++;
1310 }
1311 }
1312 do {
1313 dst[j++] = (i < 8) ? ns[i++] : ' ';
1314 } while (j < 8);
1315 }
1316 #endif
1317
1318
1319
1320
1321 /*-----------------------------------------------------------------------*/
1322 /* Calculate sum of an SFN */
1323 /*-----------------------------------------------------------------------*/
1324 #if _USE_LFN
1325 static
1326 BYTE sum_sfn (
1327 const BYTE *dir /* Ptr to directory entry */
1328 )
1329 {
1330 BYTE sum = 0;
1331 UINT n = 11;
1332
1333 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
1334 return sum;
1335 }
1336 #endif
1337
1338
1339
1340
1341 /*-----------------------------------------------------------------------*/
1342 /* Directory handling - Find an object in the directory */
1343 /*-----------------------------------------------------------------------*/
1344
1345 static
1346 FRESULT dir_find (
1347 DIR *dj /* Pointer to the directory object linked to the file name */
1348 )
1349 {
1350 FRESULT res;
1351 BYTE c, *dir;
1352 #if _USE_LFN
1353 BYTE a, ord, sum;
1354 #endif
1355
1356 res = dir_sdi(dj, 0); /* Rewind directory object */
1357 if (res != FR_OK) return res;
1358
1359 #if _USE_LFN
1360 ord = sum = 0xFF;
1361 #endif
1362 do {
1363 res = move_window(dj->fs, dj->sect);
1364 if (res != FR_OK) break;
1365 dir = dj->dir; /* Ptr to the directory entry of current index */
1366 c = dir[DIR_Name];
1367 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
1368 #if _USE_LFN /* LFN configuration */
1369 a = dir[DIR_Attr] & AM_MASK;
1370 if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
1371 ord = 0xFF;
1372 } else {
1373 if (a == AM_LFN) { /* An LFN entry is found */
1374 if (dj->lfn) {
1375 if (c & LLE) { /* Is it start of LFN sequence? */
1376 sum = dir[LDIR_Chksum];
1377 c &= ~LLE; ord = c; /* LFN start order */
1378 dj->lfn_idx = dj->index;
1379 }
1380 /* Check validity of the LFN entry and compare it with given name */
1381 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
1382 }
1383 } else { /* An SFN entry is found */
1384 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
1385 ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1386 if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */
1387 }
1388 }
1389 #else /* Non LFN configuration */
1390 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
1391 break;
1392 #endif
1393 res = dir_next(dj, 0); /* Next entry */
1394 } while (res == FR_OK);
1395
1396 return res;
1397 }
1398
1399
1400
1401
1402 /*-----------------------------------------------------------------------*/
1403 /* Read an object from the directory */
1404 /*-----------------------------------------------------------------------*/
1405 #if _FS_MINIMIZE <= 1
1406 static
1407 FRESULT dir_read (
1408 DIR *dj /* Pointer to the directory object that pointing the entry to be read */
1409 )
1410 {
1411 FRESULT res;
1412 BYTE c, *dir;
1413 #if _USE_LFN
1414 BYTE a, ord = 0xFF, sum = 0xFF;
1415 #endif
1416
1417 res = FR_NO_FILE;
1418 while (dj->sect) {
1419 res = move_window(dj->fs, dj->sect);
1420 if (res != FR_OK) break;
1421 dir = dj->dir; /* Ptr to the directory entry of current index */
1422 c = dir[DIR_Name];
1423 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
1424 #if _USE_LFN /* LFN configuration */
1425 a = dir[DIR_Attr] & AM_MASK;
1426 if (c == DDE || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
1427 ord = 0xFF;
1428 } else {
1429 if (a == AM_LFN) { /* An LFN entry is found */
1430 if (c & LLE) { /* Is it start of LFN sequence? */
1431 sum = dir[LDIR_Chksum];
1432 c &= ~LLE; ord = c;
1433 dj->lfn_idx = dj->index;
1434 }
1435 /* Check LFN validity and capture it */
1436 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
1437 } else { /* An SFN entry is found */
1438 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
1439 dj->lfn_idx = 0xFFFF; /* It has no LFN. */
1440 break;
1441 }
1442 }
1443 #else /* Non LFN configuration */
1444 if (c != DDE && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */
1445 break;
1446 #endif
1447 res = dir_next(dj, 0); /* Next entry */
1448 if (res != FR_OK) break;
1449 }
1450
1451 if (res != FR_OK) dj->sect = 0;
1452
1453 return res;
1454 }
1455 #endif
1456
1457
1458
1459 /*-----------------------------------------------------------------------*/
1460 /* Register an object to the directory */
1461 /*-----------------------------------------------------------------------*/
1462 #if !_FS_READONLY
1463 static
1464 FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
1465 DIR *dj /* Target directory with object name to be created */
1466 )
1467 {
1468 FRESULT res;
1469 BYTE c, *dir;
1470 #if _USE_LFN /* LFN configuration */
1471 WORD n, ne, is;
1472 BYTE sn[12], *fn, sum;
1473 WCHAR *lfn;
1474
1475
1476 fn = dj->fn; lfn = dj->lfn;
1477 mem_cpy(sn, fn, 12);
1478
1479 if (_FS_RPATH && (sn[NS] & NS_DOT)) /* Cannot create dot entry */
1480 return FR_INVALID_NAME;
1481
1482 if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
1483 fn[NS] = 0; dj->lfn = 0; /* Find only SFN */
1484 for (n = 1; n < 100; n++) {
1485 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
1486 res = dir_find(dj); /* Check if the name collides with existing SFN */
1487 if (res != FR_OK) break;
1488 }
1489 if (n == 100) return FR_DENIED; /* Abort if too many collisions */
1490 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
1491 fn[NS] = sn[NS]; dj->lfn = lfn;
1492 }
1493
1494 if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve an SFN + LFN entries. */
1495 for (ne = 0; lfn[ne]; ne++) ;
1496 ne = (ne + 25) / 13;
1497 } else { /* Otherwise reserve only an SFN entry. */
1498 ne = 1;
1499 }
1500
1501 /* Reserve contiguous entries */
1502 res = dir_sdi(dj, 0);
1503 if (res != FR_OK) return res;
1504 n = is = 0;
1505 do {
1506 res = move_window(dj->fs, dj->sect);
1507 if (res != FR_OK) break;
1508 c = *dj->dir; /* Check the entry status */
1509 if (c == DDE || c == 0) { /* Is it a blank entry? */
1510 if (n == 0) is = dj->index; /* First index of the contiguous entry */
1511 if (++n == ne) break; /* A contiguous entry that required count is found */
1512 } else {
1513 n = 0; /* Not a blank entry. Restart to search */
1514 }
1515 res = dir_next(dj, 1); /* Next entry with table stretch */
1516 } while (res == FR_OK);
1517
1518 if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */
1519 res = dir_sdi(dj, is);
1520 if (res == FR_OK) {
1521 sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */
1522 ne--;
1523 do { /* Store LFN entries in bottom first */
1524 res = move_window(dj->fs, dj->sect);
1525 if (res != FR_OK) break;
1526 fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
1527 dj->fs->wflag = 1;
1528 res = dir_next(dj, 0); /* Next entry */
1529 } while (res == FR_OK && --ne);
1530 }
1531 }
1532
1533 #else /* Non LFN configuration */
1534 res = dir_sdi(dj, 0);
1535 if (res == FR_OK) {
1536 do { /* Find a blank entry for the SFN */
1537 res = move_window(dj->fs, dj->sect);
1538 if (res != FR_OK) break;
1539 c = *dj->dir;
1540 if (c == DDE || c == 0) break; /* Is it a blank entry? */
1541 res = dir_next(dj, 1); /* Next entry with table stretch */
1542 } while (res == FR_OK);
1543 }
1544 #endif
1545
1546 if (res == FR_OK) { /* Initialize the SFN entry */
1547 res = move_window(dj->fs, dj->sect);
1548 if (res == FR_OK) {
1549 dir = dj->dir;
1550 mem_set(dir, 0, SZ_DIR); /* Clean the entry */
1551 mem_cpy(dir, dj->fn, 11); /* Put SFN */
1552 #if _USE_LFN
1553 dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */
1554 #endif
1555 dj->fs->wflag = 1;
1556 }
1557 }
1558
1559 return res;
1560 }
1561 #endif /* !_FS_READONLY */
1562
1563
1564
1565
1566 /*-----------------------------------------------------------------------*/
1567 /* Remove an object from the directory */
1568 /*-----------------------------------------------------------------------*/
1569 #if !_FS_READONLY && !_FS_MINIMIZE
1570 static
1571 FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */
1572 DIR *dj /* Directory object pointing the entry to be removed */
1573 )
1574 {
1575 FRESULT res;
1576 #if _USE_LFN /* LFN configuration */
1577 WORD i;
1578
1579 i = dj->index; /* SFN index */
1580 res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */
1581 if (res == FR_OK) {
1582 do {
1583 res = move_window(dj->fs, dj->sect);
1584 if (res != FR_OK) break;
1585 *dj->dir = DDE; /* Mark the entry "deleted" */
1586 dj->fs->wflag = 1;
1587 if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
1588 res = dir_next(dj, 0); /* Next entry */
1589 } while (res == FR_OK);
1590 if (res == FR_NO_FILE) res = FR_INT_ERR;
1591 }
1592
1593 #else /* Non LFN configuration */
1594 res = dir_sdi(dj, dj->index);
1595 if (res == FR_OK) {
1596 res = move_window(dj->fs, dj->sect);
1597 if (res == FR_OK) {
1598 *dj->dir = DDE; /* Mark the entry "deleted" */
1599 dj->fs->wflag = 1;
1600 }
1601 }
1602 #endif
1603
1604 return res;
1605 }
1606 #endif /* !_FS_READONLY */
1607
1608
1609
1610
1611 /*-----------------------------------------------------------------------*/
1612 /* Pick a segment and create the object name in directory form */
1613 /*-----------------------------------------------------------------------*/
1614
1615 static
1616 FRESULT create_name (
1617 DIR *dj, /* Pointer to the directory object */
1618 const TCHAR **path /* Pointer to pointer to the segment in the path string */
1619 )
1620 {
1621 #ifdef _EXCVT
1622 static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */
1623 #endif
1624
1625 #if _USE_LFN /* LFN configuration */
1626 BYTE b, cf;
1627 WCHAR w, *lfn;
1628 UINT i, ni, si, di;
1629 const TCHAR *p;
1630
1631 /* Create LFN in Unicode */
1632 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
1633 lfn = dj->lfn;
1634 si = di = 0;
1635 for (;;) {
1636 w = p[si++]; /* Get a character */
1637 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */
1638 if (di >= _MAX_LFN) /* Reject too long name */
1639 return FR_INVALID_NAME;
1640 #if !_LFN_UNICODE
1641 w &= 0xFF;
1642 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
1643 b = (BYTE)p[si++]; /* Get 2nd byte */
1644 if (!IsDBCS2(b))
1645 return FR_INVALID_NAME; /* Reject invalid sequence */
1646 w = (w << 8) + b; /* Create a DBC */
1647 }
1648 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */
1649 if (!w) return FR_INVALID_NAME; /* Reject invalid code */
1650 #endif
1651 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */
1652 return FR_INVALID_NAME;
1653 lfn[di++] = w; /* Store the Unicode char */
1654 }
1655 *path = &p[si]; /* Return pointer to the next segment */
1656 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
1657 #if _FS_RPATH
1658 if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */
1659 (di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) {
1660 lfn[di] = 0;
1661 for (i = 0; i < 11; i++)
1662 dj->fn[i] = (i < di) ? '.' : ' ';
1663 dj->fn[i] = cf | NS_DOT; /* This is a dot entry */
1664 return FR_OK;
1665 }
1666 #endif
1667 while (di) { /* Strip trailing spaces and dots */
1668 w = lfn[di-1];
1669 if (w != ' ' && w != '.') break;
1670 di--;
1671 }
1672 if (!di) return FR_INVALID_NAME; /* Reject nul string */
1673
1674 lfn[di] = 0; /* LFN is created */
1675
1676 /* Create SFN in directory form */
1677 mem_set(dj->fn, ' ', 11);
1678 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
1679 if (si) cf |= NS_LOSS | NS_LFN;
1680 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
1681
1682 b = i = 0; ni = 8;
1683 for (;;) {
1684 w = lfn[si++]; /* Get an LFN char */
1685 if (!w) break; /* Break on end of the LFN */
1686 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
1687 cf |= NS_LOSS | NS_LFN; continue;
1688 }
1689
1690 if (i >= ni || si == di) { /* Extension or end of SFN */
1691 if (ni == 11) { /* Long extension */
1692 cf |= NS_LOSS | NS_LFN; break;
1693 }
1694 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
1695 if (si > di) break; /* No extension */
1696 si = di; i = 8; ni = 11; /* Enter extension section */
1697 b <<= 2; continue;
1698 }
1699
1700 if (w >= 0x80) { /* Non ASCII char */
1701 #ifdef _EXCVT
1702 w = ff_convert(w, 0); /* Unicode -> OEM code */
1703 if (w) w = excvt[w - 0x80]; /* Convert extended char to upper (SBCS) */
1704 #else
1705 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
1706 #endif
1707 cf |= NS_LFN; /* Force create LFN entry */
1708 }
1709
1710 if (_DF1S && w >= 0x100) { /* Double byte char (always false on SBCS cfg) */
1711 if (i >= ni - 1) {
1712 cf |= NS_LOSS | NS_LFN; i = ni; continue;
1713 }
1714 dj->fn[i++] = (BYTE)(w >> 8);
1715 } else { /* Single byte char */
1716 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal chars for SFN */
1717 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
1718 } else {
1719 if (IsUpper(w)) { /* ASCII large capital */
1720 b |= 2;
1721 } else {
1722 if (IsLower(w)) { /* ASCII small capital */
1723 b |= 1; w -= 0x20;
1724 }
1725 }
1726 }
1727 }
1728 dj->fn[i++] = (BYTE)w;
1729 }
1730
1731 if (dj->fn[0] == DDE) dj->fn[0] = NDDE; /* If the first char collides with deleted mark, replace it with 0x05 */
1732
1733 if (ni == 8) b <<= 2;
1734 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
1735 cf |= NS_LFN;
1736 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */
1737 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
1738 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
1739 }
1740
1741 dj->fn[NS] = cf; /* SFN is created */
1742
1743 return FR_OK;
1744
1745
1746 #else /* Non-LFN configuration */
1747 BYTE b, c, d, *sfn;
1748 UINT ni, si, i;
1749 const char *p;
1750
1751 /* Create file name in directory form */
1752 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
1753 sfn = dj->fn;
1754 mem_set(sfn, ' ', 11);
1755 si = i = b = 0; ni = 8;
1756 #if _FS_RPATH
1757 if (p[si] == '.') { /* Is this a dot entry? */
1758 for (;;) {
1759 c = (BYTE)p[si++];
1760 if (c != '.' || si >= 3) break;
1761 sfn[i++] = c;
1762 }
1763 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
1764 *path = &p[si]; /* Return pointer to the next segment */
1765 sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */
1766 return FR_OK;
1767 }
1768 #endif
1769 for (;;) {
1770 c = (BYTE)p[si++];
1771 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */
1772 if (c == '.' || i >= ni) {
1773 if (ni != 8 || c != '.') return FR_INVALID_NAME;
1774 i = 8; ni = 11;
1775 b <<= 2; continue;
1776 }
1777 if (c >= 0x80) { /* Extended char? */
1778 b |= 3; /* Eliminate NT flag */
1779 #ifdef _EXCVT
1780 c = excvt[c-0x80]; /* Upper conversion (SBCS) */
1781 #else
1782 #if !_DF1S /* ASCII only cfg */
1783 return FR_INVALID_NAME;
1784 #endif
1785 #endif
1786 }
1787 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
1788 d = (BYTE)p[si++]; /* Get 2nd byte */
1789 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
1790 return FR_INVALID_NAME;
1791 sfn[i++] = c;
1792 sfn[i++] = d;
1793 } else { /* Single byte code */
1794 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */
1795 return FR_INVALID_NAME;
1796 if (IsUpper(c)) { /* ASCII large capital? */
1797 b |= 2;
1798 } else {
1799 if (IsLower(c)) { /* ASCII small capital? */
1800 b |= 1; c -= 0x20;
1801 }
1802 }
1803 sfn[i++] = c;
1804 }
1805 }
1806 *path = &p[si]; /* Return pointer to the next segment */
1807 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
1808
1809 if (!i) return FR_INVALID_NAME; /* Reject nul string */
1810 if (sfn[0] == DDE) sfn[0] = NDDE; /* When first char collides with DDE, replace it with 0x05 */
1811
1812 if (ni == 8) b <<= 2;
1813 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */
1814 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */
1815
1816 sfn[NS] = c; /* Store NT flag, File name is created */
1817
1818 return FR_OK;
1819 #endif
1820 }
1821
1822
1823
1824
1825 /*-----------------------------------------------------------------------*/
1826 /* Get file information from directory entry */
1827 /*-----------------------------------------------------------------------*/
1828 #if _FS_MINIMIZE <= 1
1829 static
1830 void get_fileinfo ( /* No return code */
1831 DIR *dj, /* Pointer to the directory object */
1832 FILINFO *fno /* Pointer to the file information to be filled */
1833 )
1834 {
1835 UINT i;
1836 BYTE nt, *dir;
1837 TCHAR *p, c;
1838
1839
1840 p = fno->fname;
1841 if (dj->sect) {
1842 dir = dj->dir;
1843 nt = dir[DIR_NTres]; /* NT flag */
1844 for (i = 0; i < 8; i++) { /* Copy name body */
1845 c = dir[i];
1846 if (c == ' ') break;
1847 if (c == NDDE) c = (TCHAR)DDE;
1848 if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20;
1849 #if _LFN_UNICODE
1850 if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1]))
1851 c = (c << 8) | dir[++i];
1852 c = ff_convert(c, 1);
1853 if (!c) c = '?';
1854 #endif
1855 *p++ = c;
1856 }
1857 if (dir[8] != ' ') { /* Copy name extension */
1858 *p++ = '.';
1859 for (i = 8; i < 11; i++) {
1860 c = dir[i];
1861 if (c == ' ') break;
1862 if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20;
1863 #if _LFN_UNICODE
1864 if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1]))
1865 c = (c << 8) | dir[++i];
1866 c = ff_convert(c, 1);
1867 if (!c) c = '?';
1868 #endif
1869 *p++ = c;
1870 }
1871 }
1872 fno->fattrib = dir[DIR_Attr]; /* Attribute */
1873 fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */
1874 fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */
1875 fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */
1876 }
1877 *p = 0; /* Terminate SFN str by a \0 */
1878
1879 #if _USE_LFN
1880 if (fno->lfname && fno->lfsize) {
1881 TCHAR *tp = fno->lfname;
1882 WCHAR w, *lfn;
1883
1884 i = 0;
1885 if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
1886 lfn = dj->lfn;
1887 while ((w = *lfn++) != 0) { /* Get an LFN char */
1888 #if !_LFN_UNICODE
1889 w = ff_convert(w, 0); /* Unicode -> OEM conversion */
1890 if (!w) { i = 0; break; } /* Could not convert, no LFN */
1891 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
1892 tp[i++] = (TCHAR)(w >> 8);
1893 #endif
1894 if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overflow, no LFN */
1895 tp[i++] = (TCHAR)w;
1896 }
1897 }
1898 tp[i] = 0; /* Terminate the LFN str by a \0 */
1899 }
1900 #endif
1901 }
1902 #endif /* _FS_MINIMIZE <= 1 */
1903
1904
1905
1906
1907 /*-----------------------------------------------------------------------*/
1908 /* Follow a file path */
1909 /*-----------------------------------------------------------------------*/
1910
1911 static
1912 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
1913 DIR *dj, /* Directory object to return last directory and found object */
1914 const TCHAR *path /* Full-path string to find a file or directory */
1915 )
1916 {
1917 FRESULT res;
1918 BYTE *dir, ns;
1919
1920
1921 #if _FS_RPATH
1922 if (*path == '/' || *path == '\\') { /* There is a heading separator */
1923 path++; dj->sclust = 0; /* Strip it and start from the root dir */
1924 } else { /* No heading separator */
1925 dj->sclust = dj->fs->cdir; /* Start from the current dir */
1926 }
1927 #else
1928 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
1929 path++;
1930 dj->sclust = 0; /* Start from the root dir */
1931 #endif
1932
1933 if ((UINT)*path < ' ') { /* Nul path means the start directory itself */
1934 res = dir_sdi(dj, 0);
1935 dj->dir = 0;
1936
1937 } else { /* Follow path */
1938 for (;;) {
1939 res = create_name(dj, &path); /* Get a segment */
1940 if (res != FR_OK) break;
1941 res = dir_find(dj); /* Find it */
1942 ns = *(dj->fn+NS);
1943 if (res != FR_OK) { /* Failed to find the object */
1944 if (res != FR_NO_FILE) break; /* Abort if any hard error occured */
1945 /* Object not found */
1946 if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exit */
1947 dj->sclust = 0; dj->dir = 0; /* It is the root dir */
1948 res = FR_OK;
1949 if (!(ns & NS_LAST)) continue;
1950 } else { /* Could not find the object */
1951 if (!(ns & NS_LAST)) res = FR_NO_PATH;
1952 }
1953 break;
1954 }
1955 if (ns & NS_LAST) break; /* Last segment match. Function completed. */
1956 dir = dj->dir; /* There is next segment. Follow the sub directory */
1957 if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */
1958 res = FR_NO_PATH; break;
1959 }
1960 dj->sclust = LD_CLUST(dir);
1961 }
1962 }
1963
1964 return res;
1965 }
1966
1967
1968
1969
1970 /*-----------------------------------------------------------------------*/
1971 /* Load boot record and check if it is an FAT boot record */
1972 /*-----------------------------------------------------------------------*/
1973
1974 static
1975 BYTE check_fs ( /* 0:The FAT BR, 1:Valid BR but not an FAT, 2:Not a BR, 3:Disk error */
1976 FATFS *fs, /* File system object */
1977 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
1978 )
1979 {
1980 if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK) /* Load boot record */
1981 return 3;
1982 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */
1983 return 2;
1984
1985 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
1986 return 0;
1987 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
1988 return 0;
1989
1990 return 1;
1991 }
1992
1993
1994
1995
1996 /*-----------------------------------------------------------------------*/
1997 /* Check if the file system object is valid or not */
1998 /*-----------------------------------------------------------------------*/
1999
2000 static
2001 FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occurred */
2002 const TCHAR **path, /* Pointer to pointer to the path name (drive number) */
2003 FATFS **rfs, /* Pointer to pointer to the found file system object */
2004 BYTE chk_wp /* !=0: Check media write protection for write access */
2005 )
2006 {
2007 BYTE fmt, b, *tbl;
2008 UINT vol;
2009 DSTATUS stat;
2010 DWORD bsect, fasize, tsect, sysect, nclst, szbfat;
2011 WORD nrsv;
2012 const TCHAR *p = *path;
2013 FATFS *fs;
2014
2015 /* Get logical drive number from the path name */
2016 vol = p[0] - '0'; /* Is there a drive number? */
2017 if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */
2018 p += 2; *path = p; /* Return pointer to the path name */
2019 } else { /* No drive number is given */
2020 #if _FS_RPATH
2021 vol = CurrVol; /* Use current drive */
2022 #else
2023 vol = 0; /* Use drive 0 */
2024 #endif
2025 }
2026
2027 /* Check if the logical drive is valid or not */
2028 if (vol >= _VOLUMES) /* Is the drive number valid? */
2029 return FR_INVALID_DRIVE;
2030 *rfs = fs = FatFs[vol]; /* Return pointer to the corresponding file system object */
2031 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
2032
2033 ENTER_FF(fs); /* Lock file system */
2034
2035 if (fs->fs_type) { /* If the logical drive has been mounted */
2036 stat = disk_status(fs->drv);
2037 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */
2038 #if !_FS_READONLY
2039 if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */
2040 return FR_WRITE_PROTECTED;
2041 #endif
2042 return FR_OK; /* The file system object is valid */
2043 }
2044 }
2045
2046 /* The logical drive must be mounted. */
2047 /* Following code attempts to mount a volume. (analyze BPB and initialize the fs object) */
2048
2049 fs->fs_type = 0; /* Clear the file system object */
2050 fs->drv = (BYTE)LD2PD(vol); /* Bind the logical drive and a physical drive */
2051 stat = disk_initialize(fs->drv); /* Initialize low level disk I/O layer */
2052 if (stat & STA_NOINIT) /* Check if the initialization succeeded */
2053 return FR_NOT_READY; /* Failed to initialize due to no media or hard error */
2054 #if _MAX_SS != 512 /* Get disk sector size (variable sector size cfg only) */
2055 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK)
2056 return FR_DISK_ERR;
2057 #endif
2058 #if !_FS_READONLY
2059 if (chk_wp && (stat & STA_PROTECT)) /* Check disk write protection if needed */
2060 return FR_WRITE_PROTECTED;
2061 #endif
2062 /* Search FAT partition on the drive. Supports only generic partitionings, FDISK and SFD. */
2063 fmt = check_fs(fs, bsect = 0); /* Check sector 0 if it is a VBR */
2064 if (fmt == 1) { /* Not an FAT-VBR, the disk may be partitioned */
2065 /* Check the partition listed in top of the partition table */
2066 tbl = &fs->win[MBR_Table + LD2PT(vol) * SZ_PTE];/* Partition table */
2067 if (tbl[4]) { /* Is the partition existing? */
2068 bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */
2069 fmt = check_fs(fs, bsect); /* Check the partition */
2070 }
2071 }
2072 if (fmt == 3) return FR_DISK_ERR;
2073 if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */
2074
2075 /* Following code initializes the file system object */
2076
2077 if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */
2078 return FR_NO_FILESYSTEM;
2079
2080 fasize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */
2081 if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32);
2082 fs->fsize = fasize;
2083
2084 fs->n_fats = b = fs->win[BPB_NumFATs]; /* Number of FAT copies */
2085 if (b != 1 && b != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */
2086 fasize *= b; /* Number of sectors for FAT area */
2087
2088 fs->csize = b = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
2089 if (!b || (b & (b - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */
2090
2091 fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Number of root directory entries */
2092 if (fs->n_rootdir % (SS(fs) / SZ_DIR)) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */
2093
2094 tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */
2095 if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
2096
2097 nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); /* Number of reserved sectors */
2098 if (!nrsv) return FR_NO_FILESYSTEM; /* (BPB_RsvdSecCnt must not be 0) */
2099
2100 /* Determine the FAT sub type */
2101 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); /* RSV+FAT+DIR */
2102 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
2103 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
2104 if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
2105 fmt = FS_FAT12;
2106 if (nclst >= MIN_FAT16) fmt = FS_FAT16;
2107 if (nclst >= MIN_FAT32) fmt = FS_FAT32;
2108
2109 /* Boundaries and Limits */
2110 fs->n_fatent = nclst + 2; /* Number of FAT entries */
2111 fs->database = bsect + sysect; /* Data start sector */
2112 fs->fatbase = bsect + nrsv; /* FAT start sector */
2113 if (fmt == FS_FAT32) {
2114 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
2115 fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */
2116 szbfat = fs->n_fatent * 4; /* (Required FAT size) */
2117 } else {
2118 if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
2119 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
2120 szbfat = (fmt == FS_FAT16) ? /* (Required FAT size) */
2121 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
2122 }
2123 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than required) */
2124 return FR_NO_FILESYSTEM;
2125
2126 #if !_FS_READONLY
2127 /* Initialize cluster allocation information */
2128 fs->free_clust = 0xFFFFFFFF;
2129 fs->last_clust = 0;
2130
2131 /* Get fsinfo if available */
2132 if (fmt == FS_FAT32) {
2133 fs->fsi_flag = 0;
2134 fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
2135 if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK &&
2136 LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
2137 LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
2138 LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) {
2139 fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
2140 fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
2141 }
2142 }
2143 #endif
2144 fs->fs_type = fmt; /* FAT sub-type */
2145 fs->id = ++Fsid; /* File system mount ID */
2146 fs->winsect = 0; /* Invalidate sector cache */
2147 fs->wflag = 0;
2148 #if _FS_RPATH
2149 fs->cdir = 0; /* Current directory (root dir) */
2150 #endif
2151 #if _FS_SHARE /* Clear file lock semaphores */
2152 clear_lock(fs);
2153 #endif
2154
2155 return FR_OK;
2156 }
2157
2158
2159
2160
2161 /*-----------------------------------------------------------------------*/
2162 /* Check if the file/dir object is valid or not */
2163 /*-----------------------------------------------------------------------*/
2164
2165 static
2166 FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
2167 FATFS *fs, /* Pointer to the file system object */
2168 WORD id /* Member id of the target object to be checked */
2169 )
2170 {
2171 if (!fs || !fs->fs_type || fs->id != id)
2172 return FR_INVALID_OBJECT;
2173
2174 ENTER_FF(fs); /* Lock file system */
2175
2176 if (disk_status(fs->drv) & STA_NOINIT)
2177 return FR_NOT_READY;
2178
2179 return FR_OK;
2180 }
2181
2182
2183
2184
2185 /*--------------------------------------------------------------------------
2186
2187 Public Functions
2188
2189 --------------------------------------------------------------------------*/
2190
2191
2192
2193 /*-----------------------------------------------------------------------*/
2194 /* Mount/Unmount a Logical Drive */
2195 /*-----------------------------------------------------------------------*/
2196
2197 FRESULT f_mount (
2198 BYTE vol, /* Logical drive number to be mounted/unmounted */
2199 FATFS *fs /* Pointer to new file system object (NULL for unmount)*/
2200 )
2201 {
2202 FATFS *rfs;
2203
2204
2205 if (vol >= _VOLUMES) /* Check if the drive number is valid */
2206 return FR_INVALID_DRIVE;
2207 rfs = FatFs[vol]; /* Get current fs object */
2208
2209 if (rfs) {
2210 #if _FS_SHARE
2211 clear_lock(rfs);
2212 #endif
2213 #if _FS_REENTRANT /* Discard sync object of the current volume */
2214 if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR;
2215 #endif
2216 rfs->fs_type = 0; /* Clear old fs object */
2217 }
2218
2219 if (fs) {
2220 fs->fs_type = 0; /* Clear new fs object */
2221 #if _FS_REENTRANT /* Create sync object for the new volume */
2222 if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
2223 #endif
2224 }
2225 FatFs[vol] = fs; /* Register new fs object */
2226
2227 return FR_OK;
2228 }
2229
2230
2231
2232
2233 /*-----------------------------------------------------------------------*/
2234 /* Open or Create a File */
2235 /*-----------------------------------------------------------------------*/
2236
2237 FRESULT f_open (
2238 FIL *fp, /* Pointer to the blank file object */
2239 const TCHAR *path, /* Pointer to the file name */
2240 BYTE mode /* Access mode and file open mode flags */
2241 )
2242 {
2243 FRESULT res;
2244 DIR dj;
2245 BYTE *dir;
2246 DEF_NAMEBUF;
2247
2248
2249 fp->fs = 0; /* Clear file object */
2250
2251 #if !_FS_READONLY
2252 mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
2253 res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ));
2254 #else
2255 mode &= FA_READ;
2256 res = chk_mounted(&path, &dj.fs, 0);
2257 #endif
2258 INIT_BUF(dj);
2259 if (res == FR_OK)
2260 res = follow_path(&dj, path); /* Follow the file path */
2261 dir = dj.dir;
2262
2263 #if !_FS_READONLY /* R/W configuration */
2264 if (res == FR_OK) {
2265 if (!dir) /* Current dir itself */
2266 res = FR_INVALID_NAME;
2267 #if _FS_SHARE
2268 else
2269 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2270 #endif
2271 }
2272 /* Create or Open a file */
2273 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
2274 DWORD dw, cl;
2275
2276 if (res != FR_OK) { /* No file, create new */
2277 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
2278 #if _FS_SHARE
2279 res = enq_lock(dj.fs) ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
2280 #else
2281 res = dir_register(&dj);
2282 #endif
2283 mode |= FA_CREATE_ALWAYS; /* File is created */
2284 dir = dj.dir; /* New entry */
2285 }
2286 else { /* Any object is already existing */
2287 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */
2288 res = FR_DENIED;
2289 } else {
2290 if (mode & FA_CREATE_NEW) /* Cannot create as new file */
2291 res = FR_EXIST;
2292 }
2293 }
2294 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */
2295 dw = get_fattime(); /* Created time */
2296 ST_DWORD(dir+DIR_CrtTime, dw);
2297 dir[DIR_Attr] = 0; /* Reset attribute */
2298 ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */
2299 cl = LD_CLUST(dir); /* Get start cluster */
2300 ST_CLUST(dir, 0); /* cluster = 0 */
2301 dj.fs->wflag = 1;
2302 if (cl) { /* Remove the cluster chain if exist */
2303 dw = dj.fs->winsect;
2304 res = remove_chain(dj.fs, cl);
2305 if (res == FR_OK) {
2306 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
2307 res = move_window(dj.fs, dw);
2308 }
2309 }
2310 }
2311 }
2312 else { /* Open an existing file */
2313 if (res == FR_OK) { /* Follow succeeded */
2314 if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */
2315 res = FR_NO_FILE;
2316 } else {
2317 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
2318 res = FR_DENIED;
2319 }
2320 }
2321 }
2322 if (res == FR_OK) {
2323 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */
2324 mode |= FA__WRITTEN;
2325 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
2326 fp->dir_ptr = dir;
2327 #if _FS_SHARE
2328 fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2329 if (!fp->lockid) res = FR_INT_ERR;
2330 #endif
2331 }
2332
2333 #else /* R/O configuration */
2334 if (res == FR_OK) { /* Follow succeeded */
2335 if (!dir) { /* Current dir itself */
2336 res = FR_INVALID_NAME;
2337 } else {
2338 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */
2339 res = FR_NO_FILE;
2340 }
2341 }
2342 #endif
2343 FREE_BUF();
2344
2345 if (res == FR_OK) {
2346 fp->flag = mode; /* File access mode */
2347 fp->sclust = LD_CLUST(dir); /* File start cluster */
2348 fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
2349 fp->fptr = 0; /* File pointer */
2350 fp->dsect = 0;
2351 #if _USE_FASTSEEK
2352 fp->cltbl = 0; /* Normal seek mode */
2353 #endif
2354 fp->fs = dj.fs; fp->id = dj.fs->id; /* Validate file object */
2355 }
2356
2357 LEAVE_FF(dj.fs, res);
2358 }
2359
2360
2361
2362
2363 /*-----------------------------------------------------------------------*/
2364 /* Read File */
2365 /*-----------------------------------------------------------------------*/
2366
2367 FRESULT f_read (
2368 FIL *fp, /* Pointer to the file object */
2369 void *buff, /* Pointer to data buffer */
2370 UINT btr, /* Number of bytes to read */
2371 UINT *br /* Pointer to number of bytes read */
2372 )
2373 {
2374 FRESULT res;
2375 DWORD clst, sect, remain;
2376 UINT rcnt, cc;
2377 BYTE csect, *rbuff = buff;
2378
2379
2380 *br = 0; /* Initialize byte counter */
2381
2382 res = validate(fp->fs, fp->id); /* Check validity */
2383 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2384 if (fp->flag & FA__ERROR) /* Aborted file? */
2385 LEAVE_FF(fp->fs, FR_INT_ERR);
2386 if (!(fp->flag & FA_READ)) /* Check access mode */
2387 LEAVE_FF(fp->fs, FR_DENIED);
2388 remain = fp->fsize - fp->fptr;
2389 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
2390
2391 for ( ; btr; /* Repeat until all data read */
2392 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
2393 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2394 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
2395 if (!csect) { /* On the cluster boundary? */
2396 if (fp->fptr == 0) { /* On the top of the file? */
2397 clst = fp->sclust; /* Follow from the origin */
2398 } else { /* Middle or end of the file */
2399 #if _USE_FASTSEEK
2400 if (fp->cltbl)
2401 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
2402 else
2403 #endif
2404 clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */
2405 }
2406 if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
2407 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2408 fp->clust = clst; /* Update current cluster */
2409 }
2410 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
2411 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2412 sect += csect;
2413 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
2414 if (cc) { /* Read maximum contiguous sectors directly */
2415 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2416 cc = fp->fs->csize - csect;
2417 if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK)
2418 ABORT(fp->fs, FR_DISK_ERR);
2419 #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
2420 #if _FS_TINY
2421 if (fp->fs->wflag && fp->fs->winsect - sect < cc)
2422 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
2423 #else
2424 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
2425 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
2426 #endif
2427 #endif
2428 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
2429 continue;
2430 }
2431 #if !_FS_TINY
2432 if (fp->dsect != sect) { /* Load data sector if not in cache */
2433 #if !_FS_READONLY
2434 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
2435 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2436 ABORT(fp->fs, FR_DISK_ERR);
2437 fp->flag &= ~FA__DIRTY;
2438 }
2439 #endif
2440 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */
2441 ABORT(fp->fs, FR_DISK_ERR);
2442 }
2443 #endif
2444 fp->dsect = sect;
2445 }
2446 rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
2447 if (rcnt > btr) rcnt = btr;
2448 #if _FS_TINY
2449 if (move_window(fp->fs, fp->dsect)) /* Move sector window */
2450 ABORT(fp->fs, FR_DISK_ERR);
2451 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
2452 #else
2453 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
2454 #endif
2455 }
2456
2457 LEAVE_FF(fp->fs, FR_OK);
2458 }
2459
2460
2461
2462
2463 #if !_FS_READONLY
2464 /*-----------------------------------------------------------------------*/
2465 /* Write File */
2466 /*-----------------------------------------------------------------------*/
2467
2468 FRESULT f_write (
2469 FIL *fp, /* Pointer to the file object */
2470 const void *buff, /* Pointer to the data to be written */
2471 UINT btw, /* Number of bytes to write */
2472 UINT *bw /* Pointer to number of bytes written */
2473 )
2474 {
2475 FRESULT res;
2476 DWORD clst, sect;
2477 UINT wcnt, cc;
2478 const BYTE *wbuff = buff;
2479 BYTE csect;
2480
2481
2482 *bw = 0; /* Initialize byte counter */
2483
2484 res = validate(fp->fs, fp->id); /* Check validity */
2485 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2486 if (fp->flag & FA__ERROR) /* Aborted file? */
2487 LEAVE_FF(fp->fs, FR_INT_ERR);
2488 if (!(fp->flag & FA_WRITE)) /* Check access mode */
2489 LEAVE_FF(fp->fs, FR_DENIED);
2490 if ((DWORD)(fp->fsize + btw) < fp->fsize) btw = 0; /* File size cannot reach 4GB */
2491
2492 for ( ; btw; /* Repeat until all data written */
2493 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
2494 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2495 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
2496 if (!csect) { /* On the cluster boundary? */
2497 if (fp->fptr == 0) { /* On the top of the file? */
2498 clst = fp->sclust; /* Follow from the origin */
2499 if (clst == 0) /* When no cluster is allocated, */
2500 fp->sclust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
2501 } else { /* Middle or end of the file */
2502 #if _USE_FASTSEEK
2503 if (fp->cltbl)
2504 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
2505 else
2506 #endif
2507 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */
2508 }
2509 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
2510 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
2511 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2512 fp->clust = clst; /* Update current cluster */
2513 }
2514 #if _FS_TINY
2515 if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write-back sector cache */
2516 ABORT(fp->fs, FR_DISK_ERR);
2517 #else
2518 if (fp->flag & FA__DIRTY) { /* Write-back sector cache */
2519 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2520 ABORT(fp->fs, FR_DISK_ERR);
2521 fp->flag &= ~FA__DIRTY;
2522 }
2523 #endif
2524 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
2525 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2526 sect += csect;
2527 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
2528 if (cc) { /* Write maximum contiguous sectors directly */
2529 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2530 cc = fp->fs->csize - csect;
2531 if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK)
2532 ABORT(fp->fs, FR_DISK_ERR);
2533 #if _FS_TINY
2534 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2535 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
2536 fp->fs->wflag = 0;
2537 }
2538 #else
2539 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2540 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
2541 fp->flag &= ~FA__DIRTY;
2542 }
2543 #endif
2544 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
2545 continue;
2546 }
2547 #if _FS_TINY
2548 if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */
2549 if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR);
2550 fp->fs->winsect = sect;
2551 }
2552 #else
2553 if (fp->dsect != sect) { /* Fill sector cache with file data */
2554 if (fp->fptr < fp->fsize &&
2555 disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
2556 ABORT(fp->fs, FR_DISK_ERR);
2557 }
2558 #endif
2559 fp->dsect = sect;
2560 }
2561 wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
2562 if (wcnt > btw) wcnt = btw;
2563 #if _FS_TINY
2564 if (move_window(fp->fs, fp->dsect)) /* Move sector window */
2565 ABORT(fp->fs, FR_DISK_ERR);
2566 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
2567 fp->fs->wflag = 1;
2568 #else
2569 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
2570 fp->flag |= FA__DIRTY;
2571 #endif
2572 }
2573
2574 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
2575 fp->flag |= FA__WRITTEN; /* Set file change flag */
2576
2577 LEAVE_FF(fp->fs, FR_OK);
2578 }
2579
2580
2581
2582
2583 /*-----------------------------------------------------------------------*/
2584 /* Synchronize the File Object */
2585 /*-----------------------------------------------------------------------*/
2586
2587 FRESULT f_sync (
2588 FIL *fp /* Pointer to the file object */
2589 )
2590 {
2591 FRESULT res;
2592 DWORD tim;
2593 BYTE *dir;
2594
2595
2596 res = validate(fp->fs, fp->id); /* Check validity of the object */
2597 if (res == FR_OK) {
2598 if (fp->flag & FA__WRITTEN) { /* Has the file been written? */
2599 #if !_FS_TINY /* Write-back dirty buffer */
2600 if (fp->flag & FA__DIRTY) {
2601 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2602 LEAVE_FF(fp->fs, FR_DISK_ERR);
2603 fp->flag &= ~FA__DIRTY;
2604 }
2605 #endif
2606 /* Update the directory entry */
2607 res = move_window(fp->fs, fp->dir_sect);
2608 if (res == FR_OK) {
2609 dir = fp->dir_ptr;
2610 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
2611 ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */
2612 ST_CLUST(dir, fp->sclust); /* Update start cluster */
2613 tim = get_fattime(); /* Update updated time */
2614 ST_DWORD(dir+DIR_WrtTime, tim);
2615 fp->flag &= ~FA__WRITTEN;
2616 fp->fs->wflag = 1;
2617 res = sync(fp->fs);
2618 }
2619 }
2620 }
2621
2622 LEAVE_FF(fp->fs, res);
2623 }
2624
2625 #endif /* !_FS_READONLY */
2626
2627
2628
2629
2630 /*-----------------------------------------------------------------------*/
2631 /* Close File */
2632 /*-----------------------------------------------------------------------*/
2633
2634 FRESULT f_close (
2635 FIL *fp /* Pointer to the file object to be closed */
2636 )
2637 {
2638 FRESULT res;
2639
2640 #if _FS_READONLY
2641 FATFS *fs = fp->fs;
2642 res = validate(fs, fp->id);
2643 if (res == FR_OK) fp->fs = 0; /* Discard file object */
2644 LEAVE_FF(fs, res);
2645
2646 #else
2647 res = f_sync(fp); /* Flush cached data */
2648 #if _FS_SHARE
2649 if (res == FR_OK) { /* Decrement open counter */
2650 #if _FS_REENTRANT
2651 res = validate(fp->fs, fp->id);
2652 if (res == FR_OK) {
2653 res = dec_lock(fp->lockid);
2654 unlock_fs(fp->fs, FR_OK);
2655 }
2656 #else
2657 res = dec_lock(fp->lockid);
2658 #endif
2659 }
2660 #endif
2661 if (res == FR_OK) fp->fs = 0; /* Discard file object */
2662 return res;
2663 #endif
2664 }
2665
2666
2667
2668
2669 /*-----------------------------------------------------------------------*/
2670 /* Current Drive/Directory Handlings */
2671 /*-----------------------------------------------------------------------*/
2672
2673 #if _FS_RPATH >= 1
2674
2675 FRESULT f_chdrive (
2676 BYTE drv /* Drive number */
2677 )
2678 {
2679 if (drv >= _VOLUMES) return FR_INVALID_DRIVE;
2680
2681 CurrVol = drv;
2682
2683 return FR_OK;
2684 }
2685
2686
2687
2688 FRESULT f_chdir (
2689 const TCHAR *path /* Pointer to the directory path */
2690 )
2691 {
2692 FRESULT res;
2693 DIR dj;
2694 DEF_NAMEBUF;
2695
2696
2697 res = chk_mounted(&path, &dj.fs, 0);
2698 if (res == FR_OK) {
2699 INIT_BUF(dj);
2700 res = follow_path(&dj, path); /* Follow the path */
2701 FREE_BUF();
2702 if (res == FR_OK) { /* Follow completed */
2703 if (!dj.dir) {
2704 dj.fs->cdir = dj.sclust; /* Start directory itself */
2705 } else {
2706 if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */
2707 dj.fs->cdir = LD_CLUST(dj.dir);
2708 else
2709 res = FR_NO_PATH; /* Reached but a file */
2710 }
2711 }
2712 if (res == FR_NO_FILE) res = FR_NO_PATH;
2713 }
2714
2715 LEAVE_FF(dj.fs, res);
2716 }
2717
2718
2719 #if _FS_RPATH >= 2
2720 FRESULT f_getcwd (
2721 TCHAR *path, /* Pointer to the directory path */
2722 UINT sz_path /* Size of path */
2723 )
2724 {
2725 FRESULT res;
2726 DIR dj;
2727 UINT i, n;
2728 DWORD ccl;
2729 TCHAR *tp;
2730 FILINFO fno;
2731 DEF_NAMEBUF;
2732
2733
2734 *path = 0;
2735 res = chk_mounted((const TCHAR**)&path, &dj.fs, 0); /* Get current volume */
2736 if (res == FR_OK) {
2737 INIT_BUF(dj);
2738 i = sz_path; /* Bottom of buffer (dir stack base) */
2739 dj.sclust = dj.fs->cdir; /* Start to follow upper dir from current dir */
2740 while ((ccl = dj.sclust) != 0) { /* Repeat while current dir is a sub-dir */
2741 res = dir_sdi(&dj, 1); /* Get parent dir */
2742 if (res != FR_OK) break;
2743 res = dir_read(&dj);
2744 if (res != FR_OK) break;
2745 dj.sclust = LD_CLUST(dj.dir); /* Goto parent dir */
2746 res = dir_sdi(&dj, 0);
2747 if (res != FR_OK) break;
2748 do { /* Find the entry links to the child dir */
2749 res = dir_read(&dj);
2750 if (res != FR_OK) break;
2751 if (ccl == LD_CLUST(dj.dir)) break; /* Found the entry */
2752 res = dir_next(&dj, 0);
2753 } while (res == FR_OK);
2754 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
2755 if (res != FR_OK) break;
2756 #if _USE_LFN
2757 fno.lfname = path;
2758 fno.lfsize = i;
2759 #endif
2760 get_fileinfo(&dj, &fno); /* Get the dir name and push it to the buffer */
2761 tp = fno.fname;
2762 if (_USE_LFN && *path) tp = path;
2763 for (n = 0; tp[n]; n++) ;
2764 if (i < n + 3) {
2765 res = FR_NOT_ENOUGH_CORE; break;
2766 }
2767 while (n) path[--i] = tp[--n];
2768 path[--i] = '/';
2769 }
2770 tp = path;
2771 if (res == FR_OK) {
2772 *tp++ = '0' + CurrVol; /* Put drive number */
2773 *tp++ = ':';
2774 if (i == sz_path) { /* Root-dir */
2775 *tp++ = '/';
2776 } else { /* Sub-dir */
2777 do /* Add stacked path str */
2778 *tp++ = path[i++];
2779 while (i < sz_path);
2780 }
2781 }
2782 *tp = 0;
2783 FREE_BUF();
2784 }
2785
2786 LEAVE_FF(dj.fs, res);
2787 }
2788 #endif /* _FS_RPATH >= 2 */
2789 #endif /* _FS_RPATH >= 1 */
2790
2791
2792
2793 #if _FS_MINIMIZE <= 2
2794 /*-----------------------------------------------------------------------*/
2795 /* Seek File R/W Pointer */
2796 /*-----------------------------------------------------------------------*/
2797
2798 FRESULT f_lseek (
2799 FIL *fp, /* Pointer to the file object */
2800 DWORD ofs /* File pointer from top of file */
2801 )
2802 {
2803 FRESULT res;
2804
2805
2806 res = validate(fp->fs, fp->id); /* Check validity of the object */
2807 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2808 if (fp->flag & FA__ERROR) /* Check abort flag */
2809 LEAVE_FF(fp->fs, FR_INT_ERR);
2810
2811 #if _USE_FASTSEEK
2812 if (fp->cltbl) { /* Fast seek */
2813 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
2814
2815 if (ofs == CREATE_LINKMAP) { /* Create CLMT */
2816 tbl = fp->cltbl;
2817 tlen = *tbl++; ulen = 2; /* Given table size and required table size */
2818 cl = fp->sclust; /* Top of the chain */
2819 if (cl) {
2820 do {
2821 /* Get a fragment */
2822 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
2823 do {
2824 pcl = cl; ncl++;
2825 cl = get_fat(fp->fs, cl);
2826 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
2827 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2828 } while (cl == pcl + 1);
2829 if (ulen <= tlen) { /* Store the length and top of the fragment */
2830 *tbl++ = ncl; *tbl++ = tcl;
2831 }
2832 } while (cl < fp->fs->n_fatent); /* Repeat until end of chain */
2833 }
2834 *fp->cltbl = ulen; /* Number of items used */
2835 if (ulen <= tlen)
2836 *tbl = 0; /* Terminate table */
2837 else
2838 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
2839
2840 } else { /* Fast seek */
2841 if (ofs > fp->fsize) /* Clip offset at the file size */
2842 ofs = fp->fsize;
2843 fp->fptr = ofs; /* Set file pointer */
2844 if (ofs) {
2845 fp->clust = clmt_clust(fp, ofs - 1);
2846 dsc = clust2sect(fp->fs, fp->clust);
2847 if (!dsc) ABORT(fp->fs, FR_INT_ERR);
2848 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
2849 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */
2850 #if !_FS_TINY
2851 #if !_FS_READONLY
2852 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
2853 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2854 ABORT(fp->fs, FR_DISK_ERR);
2855 fp->flag &= ~FA__DIRTY;
2856 }
2857 #endif
2858 if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */
2859 ABORT(fp->fs, FR_DISK_ERR);
2860 #endif
2861 fp->dsect = dsc;
2862 }
2863 }
2864 }
2865 } else
2866 #endif
2867
2868 /* Normal Seek */
2869 {
2870 DWORD clst, bcs, nsect, ifptr;
2871
2872 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
2873 #if !_FS_READONLY
2874 && !(fp->flag & FA_WRITE)
2875 #endif
2876 ) ofs = fp->fsize;
2877
2878 ifptr = fp->fptr;
2879 fp->fptr = nsect = 0;
2880 if (ofs) {
2881 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
2882 if (ifptr > 0 &&
2883 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
2884 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
2885 ofs -= fp->fptr;
2886 clst = fp->clust;
2887 } else { /* When seek to back cluster, */
2888 clst = fp->sclust; /* start from the first cluster */
2889 #if !_FS_READONLY
2890 if (clst == 0) { /* If no cluster chain, create a new chain */
2891 clst = create_chain(fp->fs, 0);
2892 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
2893 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2894 fp->sclust = clst;
2895 }
2896 #endif
2897 fp->clust = clst;
2898 }
2899 if (clst != 0) {
2900 while (ofs > bcs) { /* Cluster following loop */
2901 #if !_FS_READONLY
2902 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
2903 clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */
2904 if (clst == 0) { /* When disk gets full, clip file size */
2905 ofs = bcs; break;
2906 }
2907 } else
2908 #endif
2909 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
2910 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2911 if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
2912 fp->clust = clst;
2913 fp->fptr += bcs;
2914 ofs -= bcs;
2915 }
2916 fp->fptr += ofs;
2917 if (ofs % SS(fp->fs)) {
2918 nsect = clust2sect(fp->fs, clst); /* Current sector */
2919 if (!nsect) ABORT(fp->fs, FR_INT_ERR);
2920 nsect += ofs / SS(fp->fs);
2921 }
2922 }
2923 }
2924 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */
2925 #if !_FS_TINY
2926 #if !_FS_READONLY
2927 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
2928 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2929 ABORT(fp->fs, FR_DISK_ERR);
2930 fp->flag &= ~FA__DIRTY;
2931 }
2932 #endif
2933 if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */
2934 ABORT(fp->fs, FR_DISK_ERR);
2935 #endif
2936 fp->dsect = nsect;
2937 }
2938 #if !_FS_READONLY
2939 if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */
2940 fp->fsize = fp->fptr;
2941 fp->flag |= FA__WRITTEN;
2942 }
2943 #endif
2944 }
2945
2946 LEAVE_FF(fp->fs, res);
2947 }
2948
2949
2950
2951 #if _FS_MINIMIZE <= 1
2952 /*-----------------------------------------------------------------------*/
2953 /* Create a Directroy Object */
2954 /*-----------------------------------------------------------------------*/
2955
2956 FRESULT f_opendir (
2957 DIR *dj, /* Pointer to directory object to create */
2958 const TCHAR *path /* Pointer to the directory path */
2959 )
2960 {
2961 FRESULT res;
2962 DEF_NAMEBUF;
2963
2964
2965 res = chk_mounted(&path, &dj->fs, 0);
2966 if (res == FR_OK) {
2967 INIT_BUF(*dj);
2968 res = follow_path(dj, path); /* Follow the path to the directory */
2969 FREE_BUF();
2970 if (res == FR_OK) { /* Follow completed */
2971 if (dj->dir) { /* It is not the root dir */
2972 if (dj->dir[DIR_Attr] & AM_DIR) { /* The object is a directory */
2973 dj->sclust = LD_CLUST(dj->dir);
2974 } else { /* The object is not a directory */
2975 res = FR_NO_PATH;
2976 }
2977 }
2978 if (res == FR_OK) {
2979 dj->id = dj->fs->id;
2980 res = dir_sdi(dj, 0); /* Rewind dir */
2981 }
2982 }
2983 if (res == FR_NO_FILE) res = FR_NO_PATH;
2984 }
2985
2986 LEAVE_FF(dj->fs, res);
2987 }
2988
2989
2990
2991
2992 /*-----------------------------------------------------------------------*/
2993 /* Read Directory Entry in Sequense */
2994 /*-----------------------------------------------------------------------*/
2995
2996 FRESULT f_readdir (
2997 DIR *dj, /* Pointer to the open directory object */
2998 FILINFO *fno /* Pointer to file information to return */
2999 )
3000 {
3001 FRESULT res;
3002 DEF_NAMEBUF;
3003
3004
3005 res = validate(dj->fs, dj->id); /* Check validity of the object */
3006 if (res == FR_OK) {
3007 if (!fno) {
3008 res = dir_sdi(dj, 0); /* Rewind the directory object */
3009 } else {
3010 INIT_BUF(*dj);
3011 res = dir_read(dj); /* Read an directory item */
3012 if (res == FR_NO_FILE) { /* Reached end of dir */
3013 dj->sect = 0;
3014 res = FR_OK;
3015 }
3016 if (res == FR_OK) { /* A valid entry is found */
3017 get_fileinfo(dj, fno); /* Get the object information */
3018 res = dir_next(dj, 0); /* Increment index for next */
3019 if (res == FR_NO_FILE) {
3020 dj->sect = 0;
3021 res = FR_OK;
3022 }
3023 }
3024 FREE_BUF();
3025 }
3026 }
3027
3028 LEAVE_FF(dj->fs, res);
3029 }
3030
3031
3032
3033 #if _FS_MINIMIZE == 0
3034 /*-----------------------------------------------------------------------*/
3035 /* Get File Status */
3036 /*-----------------------------------------------------------------------*/
3037
3038 FRESULT f_stat (
3039 const TCHAR *path, /* Pointer to the file path */
3040 FILINFO *fno /* Pointer to file information to return */
3041 )
3042 {
3043 FRESULT res;
3044 DIR dj;
3045 DEF_NAMEBUF;
3046
3047
3048 res = chk_mounted(&path, &dj.fs, 0);
3049 if (res == FR_OK) {
3050 INIT_BUF(dj);
3051 res = follow_path(&dj, path); /* Follow the file path */
3052 if (res == FR_OK) { /* Follow completed */
3053 if (dj.dir) /* Found an object */
3054 get_fileinfo(&dj, fno);
3055 else /* It is root dir */
3056 res = FR_INVALID_NAME;
3057 }
3058 FREE_BUF();
3059 }
3060
3061 LEAVE_FF(dj.fs, res);
3062 }
3063
3064
3065
3066 #if !_FS_READONLY
3067 /*-----------------------------------------------------------------------*/
3068 /* Get Number of Free Clusters */
3069 /*-----------------------------------------------------------------------*/
3070
3071 FRESULT f_getfree (
3072 const TCHAR *path, /* Pointer to the logical drive number (root dir) */
3073 DWORD *nclst, /* Pointer to the variable to return number of free clusters */
3074 FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */
3075 )
3076 {
3077 FRESULT res;
3078 DWORD n, clst, sect, stat;
3079 UINT i;
3080 BYTE fat, *p;
3081
3082
3083 /* Get drive number */
3084 res = chk_mounted(&path, fatfs, 0);
3085 if (res == FR_OK) {
3086 /* If free_clust is valid, return it without full cluster scan */
3087 if ((*fatfs)->free_clust <= (*fatfs)->n_fatent - 2) {
3088 *nclst = (*fatfs)->free_clust;
3089 } else {
3090 /* Get number of free clusters */
3091 fat = (*fatfs)->fs_type;
3092 n = 0;
3093 if (fat == FS_FAT12) {
3094 clst = 2;
3095 do {
3096 stat = get_fat(*fatfs, clst);
3097 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
3098 if (stat == 1) { res = FR_INT_ERR; break; }
3099 if (stat == 0) n++;
3100 } while (++clst < (*fatfs)->n_fatent);
3101 } else {
3102 clst = (*fatfs)->n_fatent;
3103 sect = (*fatfs)->fatbase;
3104 i = 0; p = 0;
3105 do {
3106 if (!i) {
3107 res = move_window(*fatfs, sect++);
3108 if (res != FR_OK) break;
3109 p = (*fatfs)->win;
3110 i = SS(*fatfs);
3111 }
3112 if (fat == FS_FAT16) {
3113 if (LD_WORD(p) == 0) n++;
3114 p += 2; i -= 2;
3115 } else {
3116 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
3117 p += 4; i -= 4;
3118 }
3119 } while (--clst);
3120 }
3121 (*fatfs)->free_clust = n;
3122 if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1;
3123 *nclst = n;
3124 }
3125 }
3126 LEAVE_FF(*fatfs, res);
3127 }
3128
3129
3130
3131
3132 /*-----------------------------------------------------------------------*/
3133 /* Truncate File */
3134 /*-----------------------------------------------------------------------*/
3135
3136 FRESULT f_truncate (
3137 FIL *fp /* Pointer to the file object */
3138 )
3139 {
3140 FRESULT res;
3141 DWORD ncl;
3142
3143
3144 res = validate(fp->fs, fp->id); /* Check validity of the object */
3145 if (res == FR_OK) {
3146 if (fp->flag & FA__ERROR) { /* Check abort flag */
3147 res = FR_INT_ERR;
3148 } else {
3149 if (!(fp->flag & FA_WRITE)) /* Check access mode */
3150 res = FR_DENIED;
3151 }
3152 }
3153 if (res == FR_OK) {
3154 if (fp->fsize > fp->fptr) {
3155 fp->fsize = fp->fptr; /* Set file size to current R/W point */
3156 fp->flag |= FA__WRITTEN;
3157 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
3158 res = remove_chain(fp->fs, fp->sclust);
3159 fp->sclust = 0;
3160 } else { /* When truncate a part of the file, remove remaining clusters */
3161 ncl = get_fat(fp->fs, fp->clust);
3162 res = FR_OK;
3163 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
3164 if (ncl == 1) res = FR_INT_ERR;
3165 if (res == FR_OK && ncl < fp->fs->n_fatent) {
3166 res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF);
3167 if (res == FR_OK) res = remove_chain(fp->fs, ncl);
3168 }
3169 }
3170 }
3171 if (res != FR_OK) fp->flag |= FA__ERROR;
3172 }
3173
3174 LEAVE_FF(fp->fs, res);
3175 }
3176
3177
3178
3179
3180 /*-----------------------------------------------------------------------*/
3181 /* Delete a File or Directory */
3182 /*-----------------------------------------------------------------------*/
3183
3184 FRESULT f_unlink (
3185 const TCHAR *path /* Pointer to the file or directory path */
3186 )
3187 {
3188 FRESULT res;
3189 DIR dj, sdj;
3190 BYTE *dir;
3191 DWORD dclst;
3192 DEF_NAMEBUF;
3193
3194
3195 res = chk_mounted(&path, &dj.fs, 1);
3196 if (res == FR_OK) {
3197 INIT_BUF(dj);
3198 res = follow_path(&dj, path); /* Follow the file path */
3199 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
3200 res = FR_INVALID_NAME; /* Cannot remove dot entry */
3201 #if _FS_SHARE
3202 if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open file */
3203 #endif
3204 if (res == FR_OK) { /* The object is accessible */
3205 dir = dj.dir;
3206 if (!dir) {
3207 res = FR_INVALID_NAME; /* Cannot remove the start directory */
3208 } else {
3209 if (dir[DIR_Attr] & AM_RDO)
3210 res = FR_DENIED; /* Cannot remove R/O object */
3211 }
3212 dclst = LD_CLUST(dir);
3213 if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */
3214 if (dclst < 2) {
3215 res = FR_INT_ERR;
3216 } else {
3217 mem_cpy(&sdj, &dj, sizeof(DIR)); /* Check if the sub-dir is empty or not */
3218 sdj.sclust = dclst;
3219 res = dir_sdi(&sdj, 2); /* Exclude dot entries */
3220 if (res == FR_OK) {
3221 res = dir_read(&sdj);
3222 if (res == FR_OK /* Not empty dir */
3223 #if _FS_RPATH
3224 || dclst == sdj.fs->cdir /* Current dir */
3225 #endif
3226 ) res = FR_DENIED;
3227 if (res == FR_NO_FILE) res = FR_OK; /* Empty */
3228 }
3229 }
3230 }
3231 if (res == FR_OK) {
3232 res = dir_remove(&dj); /* Remove the directory entry */
3233 if (res == FR_OK) {
3234 if (dclst) /* Remove the cluster chain if exist */
3235 res = remove_chain(dj.fs, dclst);
3236 if (res == FR_OK) res = sync(dj.fs);
3237 }
3238 }
3239 }
3240 FREE_BUF();
3241 }
3242 LEAVE_FF(dj.fs, res);
3243 }
3244
3245
3246
3247
3248 /*-----------------------------------------------------------------------*/
3249 /* Create a Directory */
3250 /*-----------------------------------------------------------------------*/
3251
3252 FRESULT f_mkdir (
3253 const TCHAR *path /* Pointer to the directory path */
3254 )
3255 {
3256 FRESULT res;
3257 DIR dj;
3258 BYTE *dir, n;
3259 DWORD dsc, dcl, pcl, tim = get_fattime();
3260 DEF_NAMEBUF;
3261
3262
3263 res = chk_mounted(&path, &dj.fs, 1);
3264 if (res == FR_OK) {
3265 INIT_BUF(dj);
3266 res = follow_path(&dj, path); /* Follow the file path */
3267 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */
3268 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT))
3269 res = FR_INVALID_NAME;
3270 if (res == FR_NO_FILE) { /* Can create a new directory */
3271 dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */
3272 res = FR_OK;
3273 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */
3274 if (dcl == 1) res = FR_INT_ERR;
3275 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
3276 if (res == FR_OK) /* Flush FAT */
3277 res = move_window(dj.fs, 0);
3278 if (res == FR_OK) { /* Initialize the new directory table */
3279 dsc = clust2sect(dj.fs, dcl);
3280 dir = dj.fs->win;
3281 mem_set(dir, 0, SS(dj.fs));
3282 mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */
3283 dir[DIR_Name] = '.';
3284 dir[DIR_Attr] = AM_DIR;
3285 ST_DWORD(dir+DIR_WrtTime, tim);
3286 ST_CLUST(dir, dcl);
3287 mem_cpy(dir+SZ_DIR, dir, SZ_DIR); /* Create ".." entry */
3288 dir[33] = '.'; pcl = dj.sclust;
3289 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
3290 pcl = 0;
3291 ST_CLUST(dir+SZ_DIR, pcl);
3292 for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */
3293 dj.fs->winsect = dsc++;
3294 dj.fs->wflag = 1;
3295 res = move_window(dj.fs, 0);
3296 if (res != FR_OK) break;
3297 mem_set(dir, 0, SS(dj.fs));
3298 }
3299 }
3300 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */
3301 if (res != FR_OK) {
3302 remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */
3303 } else {
3304 dir = dj.dir;
3305 dir[DIR_Attr] = AM_DIR; /* Attribute */
3306 ST_DWORD(dir+DIR_WrtTime, tim); /* Created time */
3307 ST_CLUST(dir, dcl); /* Table start cluster */
3308 dj.fs->wflag = 1;
3309 res = sync(dj.fs);
3310 }
3311 }
3312 FREE_BUF();
3313 }
3314
3315 LEAVE_FF(dj.fs, res);
3316 }
3317
3318
3319
3320
3321 /*-----------------------------------------------------------------------*/
3322 /* Change Attribute */
3323 /*-----------------------------------------------------------------------*/
3324
3325 FRESULT f_chmod (
3326 const TCHAR *path, /* Pointer to the file path */
3327 BYTE value, /* Attribute bits */
3328 BYTE mask /* Attribute mask to change */
3329 )
3330 {
3331 FRESULT res;
3332 DIR dj;
3333 BYTE *dir;
3334 DEF_NAMEBUF;
3335
3336
3337 res = chk_mounted(&path, &dj.fs, 1);
3338 if (res == FR_OK) {
3339 INIT_BUF(dj);
3340 res = follow_path(&dj, path); /* Follow the file path */
3341 FREE_BUF();
3342 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
3343 res = FR_INVALID_NAME;
3344 if (res == FR_OK) {
3345 dir = dj.dir;
3346 if (!dir) { /* Is it a root directory? */
3347 res = FR_INVALID_NAME;
3348 } else { /* File or sub directory */
3349 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
3350 dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
3351 dj.fs->wflag = 1;
3352 res = sync(dj.fs);
3353 }
3354 }
3355 }
3356
3357 LEAVE_FF(dj.fs, res);
3358 }
3359
3360
3361
3362
3363 /*-----------------------------------------------------------------------*/
3364 /* Change Timestamp */
3365 /*-----------------------------------------------------------------------*/
3366
3367 FRESULT f_utime (
3368 const TCHAR *path, /* Pointer to the file/directory name */
3369 const FILINFO *fno /* Pointer to the time stamp to be set */
3370 )
3371 {
3372 FRESULT res;
3373 DIR dj;
3374 BYTE *dir;
3375 DEF_NAMEBUF;
3376
3377
3378 res = chk_mounted(&path, &dj.fs, 1);
3379 if (res == FR_OK) {
3380 INIT_BUF(dj);
3381 res = follow_path(&dj, path); /* Follow the file path */
3382 FREE_BUF();
3383 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
3384 res = FR_INVALID_NAME;
3385 if (res == FR_OK) {
3386 dir = dj.dir;
3387 if (!dir) { /* Root directory */
3388 res = FR_INVALID_NAME;
3389 } else { /* File or sub-directory */
3390 ST_WORD(dir+DIR_WrtTime, fno->ftime);
3391 ST_WORD(dir+DIR_WrtDate, fno->fdate);
3392 dj.fs->wflag = 1;
3393 res = sync(dj.fs);
3394 }
3395 }
3396 }
3397
3398 LEAVE_FF(dj.fs, res);
3399 }
3400
3401
3402
3403
3404 /*-----------------------------------------------------------------------*/
3405 /* Rename File/Directory */
3406 /*-----------------------------------------------------------------------*/
3407
3408 FRESULT f_rename (
3409 const TCHAR *path_old, /* Pointer to the old name */
3410 const TCHAR *path_new /* Pointer to the new name */
3411 )
3412 {
3413 FRESULT res;
3414 DIR djo, djn;
3415 BYTE buf[21], *dir;
3416 DWORD dw;
3417 DEF_NAMEBUF;
3418
3419
3420 res = chk_mounted(&path_old, &djo.fs, 1);
3421 if (res == FR_OK) {
3422 djn.fs = djo.fs;
3423 INIT_BUF(djo);
3424 res = follow_path(&djo, path_old); /* Check old object */
3425 if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT))
3426 res = FR_INVALID_NAME;
3427 #if _FS_SHARE
3428 if (res == FR_OK) res = chk_lock(&djo, 2);
3429 #endif
3430 if (res == FR_OK) { /* Old object is found */
3431 if (!djo.dir) { /* Is root dir? */
3432 res = FR_NO_FILE;
3433 } else {
3434 mem_cpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except for name */
3435 mem_cpy(&djn, &djo, sizeof(DIR)); /* Check new object */
3436 res = follow_path(&djn, path_new);
3437 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
3438 if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */
3439 /* Start critical section that any interruption or error can cause cross-link */
3440 res = dir_register(&djn); /* Register the new entry */
3441 if (res == FR_OK) {
3442 dir = djn.dir; /* Copy object information except for name */
3443 mem_cpy(dir+13, buf+2, 19);
3444 dir[DIR_Attr] = buf[0] | AM_ARC;
3445 djo.fs->wflag = 1;
3446 if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) { /* Update .. entry in the directory if needed */
3447 dw = clust2sect(djn.fs, LD_CLUST(dir));
3448 if (!dw) {
3449 res = FR_INT_ERR;
3450 } else {
3451 res = move_window(djn.fs, dw);
3452 dir = djn.fs->win+SZ_DIR; /* .. entry */
3453 if (res == FR_OK && dir[1] == '.') {
3454 dw = (djn.fs->fs_type == FS_FAT32 && djn.sclust == djn.fs->dirbase) ? 0 : djn.sclust;
3455 ST_CLUST(dir, dw);
3456 djn.fs->wflag = 1;
3457 }
3458 }
3459 }
3460 if (res == FR_OK) {
3461 res = dir_remove(&djo); /* Remove old entry */
3462 if (res == FR_OK)
3463 res = sync(djo.fs);
3464 }
3465 }
3466 /* End critical section */
3467 }
3468 }
3469 }
3470 FREE_BUF();
3471 }
3472 LEAVE_FF(djo.fs, res);
3473 }
3474
3475 #endif /* !_FS_READONLY */
3476 #endif /* _FS_MINIMIZE == 0 */
3477 #endif /* _FS_MINIMIZE <= 1 */
3478 #endif /* _FS_MINIMIZE <= 2 */
3479
3480
3481
3482 /*-----------------------------------------------------------------------*/
3483 /* Forward data to the stream directly (available on only tiny cfg) */
3484 /*-----------------------------------------------------------------------*/
3485 #if _USE_FORWARD && _FS_TINY
3486
3487 FRESULT f_forward (
3488 FIL *fp, /* Pointer to the file object */
3489 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
3490 UINT btr, /* Number of bytes to forward */
3491 UINT *bf /* Pointer to number of bytes forwarded */
3492 )
3493 {
3494 FRESULT res;
3495 DWORD remain, clst, sect;
3496 UINT rcnt;
3497 BYTE csect;
3498
3499
3500 *bf = 0; /* Initialize byte counter */
3501
3502 res = validate(fp->fs, fp->id); /* Check validity of the object */
3503 if (res != FR_OK) LEAVE_FF(fp->fs, res);
3504 if (fp->flag & FA__ERROR) /* Check error flag */
3505 LEAVE_FF(fp->fs, FR_INT_ERR);
3506 if (!(fp->flag & FA_READ)) /* Check access mode */
3507 LEAVE_FF(fp->fs, FR_DENIED);
3508
3509 remain = fp->fsize - fp->fptr;
3510 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
3511
3512 for ( ; btr && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */
3513 fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) {
3514 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
3515 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
3516 if (!csect) { /* On the cluster boundary? */
3517 clst = (fp->fptr == 0) ? /* On the top of the file? */
3518 fp->sclust : get_fat(fp->fs, fp->clust);
3519 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
3520 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3521 fp->clust = clst; /* Update current cluster */
3522 }
3523 }
3524 sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */
3525 if (!sect) ABORT(fp->fs, FR_INT_ERR);
3526 sect += csect;
3527 if (move_window(fp->fs, sect)) /* Move sector window */
3528 ABORT(fp->fs, FR_DISK_ERR);
3529 fp->dsect = sect;
3530 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
3531 if (rcnt > btr) rcnt = btr;
3532 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
3533 if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
3534 }
3535
3536 LEAVE_FF(fp->fs, FR_OK);
3537 }
3538 #endif /* _USE_FORWARD */
3539
3540
3541
3542 #if _USE_MKFS && !_FS_READONLY
3543 /*-----------------------------------------------------------------------*/
3544 /* Create File System on the Drive */
3545 /*-----------------------------------------------------------------------*/
3546 #define N_ROOTDIR 512 /* Number of root dir entries for FAT12/16 */
3547 #define N_FATS 1 /* Number of FAT copies (1 or 2) */
3548
3549
3550 FRESULT f_mkfs (
3551 BYTE drv, /* Logical drive number */
3552 BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */
3553 UINT au /* Allocation unit size [bytes] */
3554 )
3555 {
3556 static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0};
3557 static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
3558 BYTE fmt, md, *tbl;
3559 DWORD n_clst, vs, n, wsect;
3560 UINT i;
3561 DWORD b_vol, b_fat, b_dir, b_data; /* Offset (LBA) */
3562 DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */
3563 FATFS *fs;
3564 DSTATUS stat;
3565
3566
3567 /* Check mounted drive and clear work area */
3568 if (drv >= _VOLUMES) return FR_INVALID_DRIVE;
3569 fs = FatFs[drv];
3570 if (!fs) return FR_NOT_ENABLED;
3571 fs->fs_type = 0;
3572 drv = LD2PD(drv);
3573
3574 /* Get disk statics */
3575 stat = disk_initialize(drv);
3576 if (stat & STA_NOINIT) return FR_NOT_READY;
3577 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
3578 #if _MAX_SS != 512 /* Get disk sector size */
3579 if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK)
3580 return FR_DISK_ERR;
3581 #endif
3582 if (disk_ioctl(drv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128)
3583 return FR_DISK_ERR;
3584 b_vol = (sfd) ? 0 : 63; /* Volume start sector */
3585 n_vol -= b_vol;
3586 if (au & (au - 1)) au = 0; /* Check validity of the AU size */
3587 if (!au) { /* AU auto selection */
3588 vs = n_vol / (2000 / (SS(fs) / 512));
3589 for (i = 0; vs < vst[i]; i++) ;
3590 au = cst[i];
3591 }
3592 au /= SS(fs); /* Number of sectors per cluster */
3593 if (au == 0) au = 1;
3594 if (au > 128) au = 128;
3595
3596 /* Pre-compute number of clusters and FAT syb-type */
3597 n_clst = n_vol / au;
3598 fmt = FS_FAT12;
3599 if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
3600 if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
3601
3602 /* Determine offset and size of FAT structure */
3603 if (fmt == FS_FAT32) {
3604 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
3605 n_rsv = 32;
3606 n_dir = 0;
3607 } else {
3608 n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
3609 n_fat = (n_fat + SS(fs) - 1) / SS(fs);
3610 n_rsv = 1;
3611 n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs);
3612 }
3613 b_fat = b_vol + n_rsv; /* FAT area start sector */
3614 b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */
3615 b_data = b_dir + n_dir; /* Data area start sector */
3616 if (n_vol < b_data + au) return FR_MKFS_ABORTED; /* Too small volume */
3617
3618 /* Align data start sector to erase block boundary (for flash memory media) */
3619 if (disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1;
3620 n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */
3621 n = (n - b_data) / N_FATS;
3622 if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */
3623 n_rsv += n;
3624 b_fat += n;
3625 } else { /* FAT12/16: Expand FAT size */
3626 n_fat += n;
3627 }
3628
3629 /* Determine number of clusters and final check of validity of the FAT sub-type */
3630 n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
3631 if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16)
3632 || (fmt == FS_FAT32 && n_clst < MIN_FAT32))
3633 return FR_MKFS_ABORTED;
3634
3635 /* Create partition table if required */
3636 if (sfd) { /* No patition table (SFD) */
3637 md = 0xF0;
3638 } else { /* With patition table (FDISK) */
3639 DWORD n_disk = b_vol + n_vol;
3640
3641 mem_set(fs->win, 0, SS(fs));
3642 tbl = fs->win+MBR_Table;
3643 ST_DWORD(tbl, 0x00010180); /* Partition start in CHS */
3644 if (n_disk < 63UL * 255 * 1024) { /* Partition end in CHS */
3645 n_disk = n_disk / 63 / 255;
3646 tbl[7] = (BYTE)n_disk;
3647 tbl[6] = (BYTE)((n_disk >> 2) | 63);
3648 } else {
3649 ST_WORD(&tbl[6], 0xFFFF); /* CHS saturated */
3650 }
3651 tbl[5] = 254;
3652 if (fmt != FS_FAT32) /* System ID */
3653 tbl[4] = (n_vol < 0x10000) ? 0x04 : 0x06;
3654 else
3655 tbl[4] = 0x0c;
3656 ST_DWORD(tbl+8, 63); /* Partition start in LBA */
3657 ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */
3658 ST_WORD(fs->win+BS_55AA, 0xAA55); /* MBR signature */
3659 if (disk_write(drv, fs->win, 0, 1) != RES_OK) /* Put the MBR into first physical sector */
3660 return FR_DISK_ERR;
3661 md = 0xF8;
3662 }
3663
3664 /* Create volume boot record */
3665 tbl = fs->win; /* Clear sector */
3666 mem_set(tbl, 0, SS(fs));
3667 mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
3668 i = SS(fs); /* Sector size */
3669 ST_WORD(tbl+BPB_BytsPerSec, i);
3670 tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */
3671 ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
3672 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
3673 i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of rootdir entries */
3674 ST_WORD(tbl+BPB_RootEntCnt, i);
3675 if (n_vol < 0x10000) { /* Number of total sectors */
3676 ST_WORD(tbl+BPB_TotSec16, n_vol);
3677 } else {
3678 ST_DWORD(tbl+BPB_TotSec32, n_vol);
3679 }
3680 tbl[BPB_Media] = md; /* Media descriptor */
3681 ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */
3682 ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */
3683 ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */
3684 n = get_fattime(); /* Use current time as VSN */
3685 if (fmt == FS_FAT32) {
3686 ST_DWORD(tbl+BS_VolID32, n); /* VSN */
3687 ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */
3688 ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */
3689 ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (VBR+1) */
3690 ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */
3691 tbl[BS_DrvNum32] = 0x80; /* Drive number */
3692 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
3693 mem_cpy(tbl+BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
3694 } else {
3695 ST_DWORD(tbl+BS_VolID, n); /* VSN */
3696 ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */
3697 tbl[BS_DrvNum] = 0x80; /* Drive number */
3698 tbl[BS_BootSig] = 0x29; /* Extended boot signature */
3699 mem_cpy(tbl+BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
3700 }
3701 ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */
3702 if (disk_write(drv, tbl, b_vol, 1) != RES_OK) /* Write VBR */
3703 return FR_DISK_ERR;
3704 if (fmt == FS_FAT32) /* Write backup VBR if needed (VBR+6) */
3705 disk_write(drv, tbl, b_vol + 6, 1);
3706
3707 /* Initialize FAT area */
3708 wsect = b_fat;
3709 for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */
3710 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
3711 n = md; /* Media descriptor byte */
3712 if (fmt != FS_FAT32) {
3713 n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
3714 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */
3715 } else {
3716 n |= 0xFFFFFF00;
3717 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */
3718 ST_DWORD(tbl+4, 0xFFFFFFFF);
3719 ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */
3720 }
3721 if (disk_write(drv, tbl, wsect++, 1) != RES_OK)
3722 return FR_DISK_ERR;
3723 mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */
3724 for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */
3725 if (disk_write(drv, tbl, wsect++, 1) != RES_OK)
3726 return FR_DISK_ERR;
3727 }
3728 }
3729
3730 /* Initialize root directory */
3731 i = (fmt == FS_FAT32) ? au : n_dir;
3732 do {
3733 if (disk_write(drv, tbl, wsect++, 1) != RES_OK)
3734 return FR_DISK_ERR;
3735 } while (--i);
3736
3737 #if _USE_ERASE /* Erase data area if needed */
3738 {
3739 DWORD eb[2];
3740
3741 eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1;
3742 disk_ioctl(drv, CTRL_ERASE_SECTOR, eb);
3743 }
3744 #endif
3745
3746 /* Create FSInfo if needed */
3747 if (fmt == FS_FAT32) {
3748 ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
3749 ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
3750 ST_DWORD(tbl+FSI_Free_Count, n_clst - 1); /* Number of free clusters */
3751 ST_DWORD(tbl+FSI_Nxt_Free, 2); /* Last allocated cluster# */
3752 ST_WORD(tbl+BS_55AA, 0xAA55);
3753 disk_write(drv, tbl, b_vol + 1, 1); /* Write original (VBR+1) */
3754 disk_write(drv, tbl, b_vol + 7, 1); /* Write backup (VBR+7) */
3755 }
3756
3757 return (disk_ioctl(drv, CTRL_SYNC, (void*)0) == RES_OK) ? FR_OK : FR_DISK_ERR;
3758 }
3759
3760 #endif /* _USE_MKFS && !_FS_READONLY */
3761
3762
3763
3764
3765 #if _USE_STRFUNC
3766 /*-----------------------------------------------------------------------*/
3767 /* Get a string from the file */
3768 /*-----------------------------------------------------------------------*/
3769 TCHAR* f_gets (
3770 TCHAR* buff, /* Pointer to the string buffer to read */
3771 int len, /* Size of string buffer (characters) */
3772 FIL* fil /* Pointer to the file object */
3773 )
3774 {
3775 int n = 0;
3776 TCHAR c, *p = buff;
3777 BYTE s[2];
3778 UINT rc;
3779
3780
3781 while (n < len - 1) { /* Read bytes until buffer gets filled */
3782 f_read(fil, s, 1, &rc);
3783 if (rc != 1) break; /* Break on EOF or error */
3784 c = s[0];
3785 #if _LFN_UNICODE /* Read a character in UTF-8 encoding */
3786 if (c >= 0x80) {
3787 if (c < 0xC0) continue; /* Skip stray trailer */
3788 if (c < 0xE0) { /* Two-byte sequense */
3789 f_read(fil, s, 1, &rc);
3790 if (rc != 1) break;
3791 c = ((c & 0x1F) << 6) | (s[0] & 0x3F);
3792 if (c < 0x80) c = '?';
3793 } else {
3794 if (c < 0xF0) { /* Three-byte sequense */
3795 f_read(fil, s, 2, &rc);
3796 if (rc != 2) break;
3797 c = (c << 12) | ((s[0] & 0x3F) << 6) | (s[1] & 0x3F);
3798 if (c < 0x800) c = '?';
3799 } else { /* Reject four-byte sequense */
3800 c = '?';
3801 }
3802 }
3803 }
3804 #endif
3805 #if _USE_STRFUNC >= 2
3806 if (c == '\r') continue; /* Strip '\r' */
3807 #endif
3808 *p++ = c;
3809 n++;
3810 if (c == '\n') break; /* Break on EOL */
3811 }
3812 *p = 0;
3813 return n ? buff : 0; /* When no data read (eof or error), return with error. */
3814 }
3815
3816
3817
3818 #if !_FS_READONLY
3819 #include <stdarg.h>
3820 /*-----------------------------------------------------------------------*/
3821 /* Put a character to the file */
3822 /*-----------------------------------------------------------------------*/
3823 int f_putc (
3824 TCHAR c, /* A character to be output */
3825 FIL* fil /* Pointer to the file object */
3826 )
3827 {
3828 UINT bw, btw;
3829 BYTE s[3];
3830
3831
3832 #if _USE_STRFUNC >= 2
3833 if (c == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */
3834 #endif
3835
3836 #if _LFN_UNICODE /* Write the character in UTF-8 encoding */
3837 if (c < 0x80) { /* 7-bit */
3838 s[0] = (BYTE)c;
3839 btw = 1;
3840 } else {
3841 if (c < 0x800) { /* 11-bit */
3842 s[0] = (BYTE)(0xC0 | (c >> 6));
3843 s[1] = (BYTE)(0x80 | (c & 0x3F));
3844 btw = 2;
3845 } else { /* 16-bit */
3846 s[0] = (BYTE)(0xE0 | (c >> 12));
3847 s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F));
3848 s[2] = (BYTE)(0x80 | (c & 0x3F));
3849 btw = 3;
3850 }
3851 }
3852 #else /* Write the character without conversion */
3853 s[0] = (BYTE)c;
3854 btw = 1;
3855 #endif
3856 f_write(fil, s, btw, &bw); /* Write the char to the file */
3857 return (bw == btw) ? 1 : EOF; /* Return the result */
3858 }
3859
3860
3861
3862
3863 /*-----------------------------------------------------------------------*/
3864 /* Put a string to the file */
3865 /*-----------------------------------------------------------------------*/
3866 int f_puts (
3867 const TCHAR* str, /* Pointer to the string to be output */
3868 FIL* fil /* Pointer to the file object */
3869 )
3870 {
3871 int n;
3872
3873
3874 for (n = 0; *str; str++, n++) {
3875 if (f_putc(*str, fil) == EOF) return EOF;
3876 }
3877 return n;
3878 }
3879
3880
3881
3882
3883 /*-----------------------------------------------------------------------*/
3884 /* Put a formatted string to the file */
3885 /*-----------------------------------------------------------------------*/
3886 int f_printf (
3887 FIL* fil, /* Pointer to the file object */
3888 const TCHAR* str, /* Pointer to the format string */
3889 ... /* Optional arguments... */
3890 )
3891 {
3892 va_list arp;
3893 BYTE f, r;
3894 UINT i, j, w;
3895 ULONG v;
3896 TCHAR c, d, s[16], *p;
3897 int res, cc;
3898
3899
3900 va_start(arp, str);
3901
3902 for (cc = res = 0; cc != EOF; res += cc) {
3903 c = *str++;
3904 if (c == 0) break; /* End of string */
3905 if (c != '%') { /* Non escape character */
3906 cc = f_putc(c, fil);
3907 if (cc != EOF) cc = 1;
3908 continue;
3909 }
3910 w = f = 0;
3911 c = *str++;
3912 if (c == '0') { /* Flag: '0' padding */
3913 f = 1; c = *str++;
3914 } else {
3915 if (c == '-') { /* Flag: left justified */
3916 f = 2; c = *str++;
3917 }
3918 }
3919 while (IsDigit(c)) { /* Precision */
3920 w = w * 10 + c - '0';
3921 c = *str++;
3922 }
3923 if (c == 'l' || c == 'L') { /* Prefix: Size is long int */
3924 f |= 4; c = *str++;
3925 }
3926 if (!c) break;
3927 d = c;
3928 if (IsLower(d)) d -= 0x20;
3929 switch (d) { /* Type is... */
3930 case 'S' : /* String */
3931 p = va_arg(arp, TCHAR*);
3932 for (j = 0; p[j]; j++) ;
3933 res = 0;
3934 while (!(f & 2) && j++ < w) res += (cc = f_putc(' ', fil));
3935 res += (cc = f_puts(p, fil));
3936 while (j++ < w) res += (cc = f_putc(' ', fil));
3937 if (cc != EOF) cc = res;
3938 continue;
3939 case 'C' : /* Character */
3940 cc = f_putc((TCHAR)va_arg(arp, int), fil); continue;
3941 case 'B' : /* Binary */
3942 r = 2; break;
3943 case 'O' : /* Octal */
3944 r = 8; break;
3945 case 'D' : /* Signed decimal */
3946 case 'U' : /* Unsigned decimal */
3947 r = 10; break;
3948 case 'X' : /* Hexdecimal */
3949 r = 16; break;
3950 default: /* Unknown type (passthrough) */
3951 cc = f_putc(c, fil); continue;
3952 }
3953
3954 /* Get an argument and put it in numeral */
3955 v = (f & 4) ? va_arg(arp, long) : ((d == 'D') ? (long)va_arg(arp, int) : va_arg(arp, unsigned int));
3956 if (d == 'D' && (v & 0x80000000)) {
3957 v = 0 - v;
3958 f |= 8;
3959 }
3960 i = 0;
3961 do {
3962 d = (TCHAR)(v % r); v /= r;
3963 if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
3964 s[i++] = d + '0';
3965 } while (v && i < sizeof(s) / sizeof(s[0]));
3966 if (f & 8) s[i++] = '-';
3967 j = i; d = (f & 1) ? '0' : ' ';
3968 res = 0;
3969 while (!(f & 2) && j++ < w) res += (cc = f_putc(d, fil));
3970 do res += (cc = f_putc(s[--i], fil)); while(i);
3971 while (j++ < w) res += (cc = f_putc(' ', fil));
3972 if (cc != EOF) cc = res;
3973 }
3974
3975 va_end(arp);
3976 return (cc == EOF) ? cc : res;
3977 }
3978
3979 #endif /* !_FS_READONLY */
3980 #endif /* _USE_STRFUNC */
3981
Lightweight USB Framework for AVRs