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ff.c
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1 /*----------------------------------------------------------------------------/
2 / FatFs - FAT file system module R0.09a (C)ChaN, 2012
3 /-----------------------------------------------------------------------------/
4 / FatFs module is a generic FAT file system module for small embedded systems.
5 / This is a free software that opened for education, research and commercial
6 / developments under license policy of following terms.
7 /
8 / Copyright (C) 2012, ChaN, all right reserved.
9 /
10 / * The FatFs module is a free software and there is NO WARRANTY.
11 / * No restriction on use. You can use, modify and redistribute it for
12 / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
13 / * Redistributions of source code must retain the above copyright notice.
14 /
15 /-----------------------------------------------------------------------------/
16 / Feb 26,'06 R0.00 Prototype.
17 /
18 / Apr 29,'06 R0.01 First stable version.
19 /
20 / Jun 01,'06 R0.02 Added FAT12 support.
21 / Removed unbuffered mode.
22 / Fixed a problem on small (<32M) partition.
23 / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
24 /
25 / Sep 22,'06 R0.03 Added f_rename().
26 / Changed option _FS_MINIMUM to _FS_MINIMIZE.
27 / Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast.
28 / Fixed f_mkdir() creates incorrect directory on FAT32.
29 /
30 / Feb 04,'07 R0.04 Supported multiple drive system.
31 / Changed some interfaces for multiple drive system.
32 / Changed f_mountdrv() to f_mount().
33 / Added f_mkfs().
34 / Apr 01,'07 R0.04a Supported multiple partitions on a physical drive.
35 / Added a capability of extending file size to f_lseek().
36 / Added minimization level 3.
37 / Fixed an endian sensitive code in f_mkfs().
38 / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
39 / Added FSInfo support.
40 / Fixed DBCS name can result FR_INVALID_NAME.
41 / Fixed short seek (<= csize) collapses the file object.
42 /
43 / Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs().
44 / Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
45 / Fixed f_mkdir() on FAT32 creates incorrect directory.
46 / Feb 03,'08 R0.05a Added f_truncate() and f_utime().
47 / Fixed off by one error at FAT sub-type determination.
48 / Fixed btr in f_read() can be mistruncated.
49 / Fixed cached sector is not flushed when create and close without write.
50 /
51 / Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets().
52 / Improved performance of f_lseek() on moving to the same or following cluster.
53 /
54 / Apr 01,'09 R0.07 Merged Tiny-FatFs as a configuration option. (_FS_TINY)
55 / Added long file name feature.
56 / Added multiple code page feature.
57 / Added re-entrancy for multitask operation.
58 / Added auto cluster size selection to f_mkfs().
59 / Added rewind option to f_readdir().
60 / Changed result code of critical errors.
61 / Renamed string functions to avoid name collision.
62 / Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
63 / Added multiple sector size feature.
64 / Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
65 / Fixed wrong cache control in f_lseek().
66 / Added relative path feature.
67 / Added f_chdir() and f_chdrive().
68 / Added proper case conversion to extended char.
69 / Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
70 / Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
71 / Fixed name matching error on the 13 char boundary.
72 / Added a configuration option, _LFN_UNICODE.
73 / Changed f_readdir() to return the SFN with always upper case on non-LFN cfg.
74 /
75 / May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN = 3)
76 / Added file lock feature. (_FS_SHARE)
77 / Added fast seek feature. (_USE_FASTSEEK)
78 / Changed some types on the API, XCHAR->TCHAR.
79 / Changed fname member in the FILINFO structure on Unicode cfg.
80 / String functions support UTF-8 encoding files on Unicode cfg.
81 / Aug 16,'10 R0.08a Added f_getcwd(). (_FS_RPATH = 2)
82 / Added sector erase feature. (_USE_ERASE)
83 / Moved file lock semaphore table from fs object to the bss.
84 / Fixed a wrong directory entry is created on non-LFN cfg when the given name contains ';'.
85 / Fixed f_mkfs() creates wrong FAT32 volume.
86 / Jan 15,'11 R0.08b Fast seek feature is also applied to f_read() and f_write().
87 / f_lseek() reports required table size on creating CLMP.
88 / Extended format syntax of f_printf function.
89 / Ignores duplicated directory separators in given path name.
90 /
91 / Sep 06,'11 R0.09 f_mkfs() supports multiple partition to finish the multiple partition feature.
92 / Added f_fdisk(). (_MULTI_PARTITION = 2)
93 / Aug 27,'12 R0.09a Fixed assertion failure due to OS/2 EA on FAT12/16 volume.
94 / Changed f_open() and f_opendir reject null object pointer to avoid crash.
95 / Changed option name _FS_SHARE to _FS_LOCK.
96 /---------------------------------------------------------------------------*/
97
98 #include "ff.h" /* FatFs configurations and declarations */
99 #include "diskio.h" /* Declarations of low level disk I/O functions */
100
101
102 /*--------------------------------------------------------------------------
103
104 Module Private Definitions
105
106 ---------------------------------------------------------------------------*/
107
108 #if _FATFS != 4004 /* Revision ID */
109 #error Wrong include file (ff.h).
110 #endif
111
112
113 /* Definitions on sector size */
114 #if _MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096
115 #error Wrong sector size.
116 #endif
117 #if _MAX_SS != 512
118 #define SS(fs) ((fs)->ssize) /* Variable sector size */
119 #else
120 #define SS(fs) 512U /* Fixed sector size */
121 #endif
122
123
124 /* Reentrancy related */
125 #if _FS_REENTRANT
126 #if _USE_LFN == 1
127 #error Static LFN work area must not be used in re-entrant configuration.
128 #endif
129 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
130 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
131 #else
132 #define ENTER_FF(fs)
133 #define LEAVE_FF(fs, res) return res
134 #endif
135
136 #define ABORT(fs, res) { fp->flag |= FA__ERROR; LEAVE_FF(fs, res); }
137
138
139 /* File access control feature */
140 #if _FS_LOCK
141 #if _FS_READONLY
142 #error _FS_LOCK must be 0 on read-only cfg.
143 #endif
144 typedef struct {
145 FATFS *fs; /* File ID 1, volume (NULL:blank entry) */
146 DWORD clu; /* File ID 2, directory */
147 WORD idx; /* File ID 3, directory index */
148 WORD ctr; /* File open counter, 0:none, 0x01..0xFF:read open count, 0x100:write mode */
149 } FILESEM;
150 #endif
151
152
153
154 /* DBCS code ranges and SBCS extend char conversion table */
155
156 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */
157 #define _DF1S 0x81 /* DBC 1st byte range 1 start */
158 #define _DF1E 0x9F /* DBC 1st byte range 1 end */
159 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */
160 #define _DF2E 0xFC /* DBC 1st byte range 2 end */
161 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */
162 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */
163 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */
164 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */
165
166 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
167 #define _DF1S 0x81
168 #define _DF1E 0xFE
169 #define _DS1S 0x40
170 #define _DS1E 0x7E
171 #define _DS2S 0x80
172 #define _DS2E 0xFE
173
174 #elif _CODE_PAGE == 949 /* Korean */
175 #define _DF1S 0x81
176 #define _DF1E 0xFE
177 #define _DS1S 0x41
178 #define _DS1E 0x5A
179 #define _DS2S 0x61
180 #define _DS2E 0x7A
181 #define _DS3S 0x81
182 #define _DS3E 0xFE
183
184 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
185 #define _DF1S 0x81
186 #define _DF1E 0xFE
187 #define _DS1S 0x40
188 #define _DS1E 0x7E
189 #define _DS2S 0xA1
190 #define _DS2E 0xFE
191
192 #elif _CODE_PAGE == 437 /* U.S. (OEM) */
193 #define _DF1S 0
194 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F,0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
195 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
196 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
197 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
198
199 #elif _CODE_PAGE == 720 /* Arabic (OEM) */
200 #define _DF1S 0
201 #define _EXCVT {0x80,0x81,0x45,0x41,0x84,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x49,0x49,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
202 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
203 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
204 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
205
206 #elif _CODE_PAGE == 737 /* Greek (OEM) */
207 #define _DF1S 0
208 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
209 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
210 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
211 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
212
213 #elif _CODE_PAGE == 775 /* Baltic (OEM) */
214 #define _DF1S 0
215 #define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
216 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
217 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
218 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
219
220 #elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */
221 #define _DF1S 0
222 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
223 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
224 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
225 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
226
227 #elif _CODE_PAGE == 852 /* Latin 2 (OEM) */
228 #define _DF1S 0
229 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F,0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0x9F, \
230 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
231 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
232 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
233
234 #elif _CODE_PAGE == 855 /* Cyrillic (OEM) */
235 #define _DF1S 0
236 #define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F,0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
237 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
238 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
239 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
240
241 #elif _CODE_PAGE == 857 /* Turkish (OEM) */
242 #define _DF1S 0
243 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x98,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
244 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
245 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
246 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
247
248 #elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */
249 #define _DF1S 0
250 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
251 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
252 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
253 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
254
255 #elif _CODE_PAGE == 862 /* Hebrew (OEM) */
256 #define _DF1S 0
257 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
258 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
259 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
260 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
261
262 #elif _CODE_PAGE == 866 /* Russian (OEM) */
263 #define _DF1S 0
264 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
265 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
266 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
267 0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
268
269 #elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */
270 #define _DF1S 0
271 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
272 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
273 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
274 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
275
276 #elif _CODE_PAGE == 1250 /* Central Europe (Windows) */
277 #define _DF1S 0
278 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
279 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xA3,0xB4,0xB5,0xB6,0xB7,0xB8,0xA5,0xAA,0xBB,0xBC,0xBD,0xBC,0xAF, \
280 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
281 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
282
283 #elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */
284 #define _DF1S 0
285 #define _EXCVT {0x80,0x81,0x82,0x82,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x80,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
286 0xA0,0xA2,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB2,0xA5,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xA3,0xBD,0xBD,0xAF, \
287 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
288 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF}
289
290 #elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */
291 #define _DF1S 0
292 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0xAd,0x9B,0x8C,0x9D,0xAE,0x9F, \
293 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
294 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
295 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
296
297 #elif _CODE_PAGE == 1253 /* Greek (Windows) */
298 #define _DF1S 0
299 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
300 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
301 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xA2,0xB8,0xB9,0xBA, \
302 0xE0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xFB,0xBC,0xFD,0xBF,0xFF}
303
304 #elif _CODE_PAGE == 1254 /* Turkish (Windows) */
305 #define _DF1S 0
306 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x9D,0x9E,0x9F, \
307 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
308 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
309 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
310
311 #elif _CODE_PAGE == 1255 /* Hebrew (Windows) */
312 #define _DF1S 0
313 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
314 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
315 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
316 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
317
318 #elif _CODE_PAGE == 1256 /* Arabic (Windows) */
319 #define _DF1S 0
320 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x8C,0x9D,0x9E,0x9F, \
321 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
322 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
323 0x41,0xE1,0x41,0xE3,0xE4,0xE5,0xE6,0x43,0x45,0x45,0x45,0x45,0xEC,0xED,0x49,0x49,0xF0,0xF1,0xF2,0xF3,0x4F,0xF5,0xF6,0xF7,0xF8,0x55,0xFA,0x55,0x55,0xFD,0xFE,0xFF}
324
325 #elif _CODE_PAGE == 1257 /* Baltic (Windows) */
326 #define _DF1S 0
327 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
328 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xBC,0xBD,0xBE,0xAF, \
329 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
330 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
331
332 #elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */
333 #define _DF1S 0
334 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0xAC,0x9D,0x9E,0x9F, \
335 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
336 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
337 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xEC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xFE,0x9F}
338
339 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
340 #if _USE_LFN
341 #error Cannot use LFN feature without valid code page.
342 #endif
343 #define _DF1S 0
344
345 #else
346 #error Unknown code page
347
348 #endif
349
350
351 /* Character code support macros */
352 #define IsUpper(c) (((c)>='A')&&((c)<='Z'))
353 #define IsLower(c) (((c)>='a')&&((c)<='z'))
354 #define IsDigit(c) (((c)>='0')&&((c)<='9'))
355
356 #if _DF1S /* Code page is DBCS */
357
358 #ifdef _DF2S /* Two 1st byte areas */
359 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
360 #else /* One 1st byte area */
361 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
362 #endif
363
364 #ifdef _DS3S /* Three 2nd byte areas */
365 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
366 #else /* Two 2nd byte areas */
367 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
368 #endif
369
370 #else /* Code page is SBCS */
371
372 #define IsDBCS1(c) 0
373 #define IsDBCS2(c) 0
374
375 #endif /* _DF1S */
376
377
378 /* Name status flags */
379 #define NS 11 /* Index of name status byte in fn[] */
380 #define NS_LOSS 0x01 /* Out of 8.3 format */
381 #define NS_LFN 0x02 /* Force to create LFN entry */
382 #define NS_LAST 0x04 /* Last segment */
383 #define NS_BODY 0x08 /* Lower case flag (body) */
384 #define NS_EXT 0x10 /* Lower case flag (ext) */
385 #define NS_DOT 0x20 /* Dot entry */
386
387
388 /* FAT sub-type boundaries */
389 /* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */
390 #define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */
391 #define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */
392
393
394 /* FatFs refers the members in the FAT structures as byte array instead of
395 / structure member because the structure is not binary compatible between
396 / different platforms */
397
398 #define BS_jmpBoot 0 /* Jump instruction (3) */
399 #define BS_OEMName 3 /* OEM name (8) */
400 #define BPB_BytsPerSec 11 /* Sector size [byte] (2) */
401 #define BPB_SecPerClus 13 /* Cluster size [sector] (1) */
402 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */
403 #define BPB_NumFATs 16 /* Number of FAT copies (1) */
404 #define BPB_RootEntCnt 17 /* Number of root dir entries for FAT12/16 (2) */
405 #define BPB_TotSec16 19 /* Volume size [sector] (2) */
406 #define BPB_Media 21 /* Media descriptor (1) */
407 #define BPB_FATSz16 22 /* FAT size [sector] (2) */
408 #define BPB_SecPerTrk 24 /* Track size [sector] (2) */
409 #define BPB_NumHeads 26 /* Number of heads (2) */
410 #define BPB_HiddSec 28 /* Number of special hidden sectors (4) */
411 #define BPB_TotSec32 32 /* Volume size [sector] (4) */
412 #define BS_DrvNum 36 /* Physical drive number (2) */
413 #define BS_BootSig 38 /* Extended boot signature (1) */
414 #define BS_VolID 39 /* Volume serial number (4) */
415 #define BS_VolLab 43 /* Volume label (8) */
416 #define BS_FilSysType 54 /* File system type (1) */
417 #define BPB_FATSz32 36 /* FAT size [sector] (4) */
418 #define BPB_ExtFlags 40 /* Extended flags (2) */
419 #define BPB_FSVer 42 /* File system version (2) */
420 #define BPB_RootClus 44 /* Root dir first cluster (4) */
421 #define BPB_FSInfo 48 /* Offset of FSInfo sector (2) */
422 #define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */
423 #define BS_DrvNum32 64 /* Physical drive number (2) */
424 #define BS_BootSig32 66 /* Extended boot signature (1) */
425 #define BS_VolID32 67 /* Volume serial number (4) */
426 #define BS_VolLab32 71 /* Volume label (8) */
427 #define BS_FilSysType32 82 /* File system type (1) */
428 #define FSI_LeadSig 0 /* FSI: Leading signature (4) */
429 #define FSI_StrucSig 484 /* FSI: Structure signature (4) */
430 #define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */
431 #define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */
432 #define MBR_Table 446 /* MBR: Partition table offset (2) */
433 #define SZ_PTE 16 /* MBR: Size of a partition table entry */
434 #define BS_55AA 510 /* Boot sector signature (2) */
435
436 #define DIR_Name 0 /* Short file name (11) */
437 #define DIR_Attr 11 /* Attribute (1) */
438 #define DIR_NTres 12 /* NT flag (1) */
439 #define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */
440 #define DIR_CrtTime 14 /* Created time (2) */
441 #define DIR_CrtDate 16 /* Created date (2) */
442 #define DIR_LstAccDate 18 /* Last accessed date (2) */
443 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */
444 #define DIR_WrtTime 22 /* Modified time (2) */
445 #define DIR_WrtDate 24 /* Modified date (2) */
446 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */
447 #define DIR_FileSize 28 /* File size (4) */
448 #define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */
449 #define LDIR_Attr 11 /* LFN attribute (1) */
450 #define LDIR_T 12 /* LFN type (1) */
451 #define LDIR_Chksum 13 /* Sum of corresponding SFN entry */
452 #define LDIR_FstClusLO 26 /* Filled by zero (0) */
453 #define SZ_DIR 32 /* Size of a directory entry */
454 #define LLE 0x40 /* Last long entry flag in LDIR_Ord */
455 #define DDE 0xE5 /* Deleted directory entry mark in DIR_Name[0] */
456 #define NDDE 0x05 /* Replacement of the character collides with DDE */
457
458
459 /*------------------------------------------------------------*/
460 /* Module private work area */
461 /*------------------------------------------------------------*/
462 /* Note that uninitialized variables with static duration are
463 / zeroed/nulled at start-up. If not, the compiler or start-up
464 / routine is out of ANSI-C standard.
465 */
466
467 #if _VOLUMES
468 static
469 FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */
470 #else
471 #error Number of volumes must not be 0.
472 #endif
473
474 static
475 WORD Fsid; /* File system mount ID */
476
477 #if _FS_RPATH
478 static
479 BYTE CurrVol; /* Current drive */
480 #endif
481
482 #if _FS_LOCK
483 static
484 FILESEM Files[_FS_LOCK]; /* File lock semaphores */
485 #endif
486
487 #if _USE_LFN == 0 /* No LFN feature */
488 #define DEF_NAMEBUF BYTE sfn[12]
489 #define INIT_BUF(dobj) (dobj).fn = sfn
490 #define FREE_BUF()
491
492 #elif _USE_LFN == 1 /* LFN feature with static working buffer */
493 static WCHAR LfnBuf[_MAX_LFN+1];
494 #define DEF_NAMEBUF BYTE sfn[12]
495 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
496 #define FREE_BUF()
497
498 #elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */
499 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN+1]
500 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; }
501 #define FREE_BUF()
502
503 #elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */
504 #define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn
505 #define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \
506 if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \
507 (dobj).lfn = lfn; (dobj).fn = sfn; }
508 #define FREE_BUF() ff_memfree(lfn)
509
510 #else
511 #error Wrong LFN configuration.
512 #endif
513
514
515
516
517 /*--------------------------------------------------------------------------
518
519 Module Private Functions
520
521 ---------------------------------------------------------------------------*/
522
523
524 /*-----------------------------------------------------------------------*/
525 /* String functions */
526 /*-----------------------------------------------------------------------*/
527
528 /* Copy memory to memory */
529 static
530 void mem_cpy (void* dst, const void* src, UINT cnt) {
531 BYTE *d = (BYTE*)dst;
532 const BYTE *s = (const BYTE*)src;
533
534 #if _WORD_ACCESS == 1
535 while (cnt >= sizeof (int)) {
536 *(int*)d = *(int*)s;
537 d += sizeof (int); s += sizeof (int);
538 cnt -= sizeof (int);
539 }
540 #endif
541 while (cnt--)
542 *d++ = *s++;
543 }
544
545 /* Fill memory */
546 static
547 void mem_set (void* dst, int val, UINT cnt) {
548 BYTE *d = (BYTE*)dst;
549
550 while (cnt--)
551 *d++ = (BYTE)val;
552 }
553
554 /* Compare memory to memory */
555 static
556 int mem_cmp (const void* dst, const void* src, UINT cnt) {
557 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
558 int r = 0;
559
560 while (cnt-- && (r = *d++ - *s++) == 0) ;
561 return r;
562 }
563
564 /* Check if chr is contained in the string */
565 static
566 int chk_chr (const char* str, int chr) {
567 while (*str && *str != chr) str++;
568 return *str;
569 }
570
571
572
573 /*-----------------------------------------------------------------------*/
574 /* Request/Release grant to access the volume */
575 /*-----------------------------------------------------------------------*/
576 #if _FS_REENTRANT
577
578 static
579 int lock_fs (
580 FATFS *fs /* File system object */
581 )
582 {
583 return ff_req_grant(fs->sobj);
584 }
585
586
587 static
588 void unlock_fs (
589 FATFS *fs, /* File system object */
590 FRESULT res /* Result code to be returned */
591 )
592 {
593 if (fs &&
594 res != FR_NOT_ENABLED &&
595 res != FR_INVALID_DRIVE &&
596 res != FR_INVALID_OBJECT &&
597 res != FR_TIMEOUT) {
598 ff_rel_grant(fs->sobj);
599 }
600 }
601 #endif
602
603
604
605 /*-----------------------------------------------------------------------*/
606 /* File lock control functions */
607 /*-----------------------------------------------------------------------*/
608 #if _FS_LOCK
609
610 static
611 FRESULT chk_lock ( /* Check if the file can be accessed */
612 DIR* dj, /* Directory object pointing the file to be checked */
613 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
614 )
615 {
616 UINT i, be;
617
618 /* Search file semaphore table */
619 for (i = be = 0; i < _FS_LOCK; i++) {
620 if (Files[i].fs) { /* Existing entry */
621 if (Files[i].fs == dj->fs && /* Check if the file matched with an open file */
622 Files[i].clu == dj->sclust &&
623 Files[i].idx == dj->index) break;
624 } else { /* Blank entry */
625 be++;
626 }
627 }
628 if (i == _FS_LOCK) /* The file is not opened */
629 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new file? */
630
631 /* The file has been opened. Reject any open against writing file and all write mode open */
632 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
633 }
634
635
636 static
637 int enq_lock (void) /* Check if an entry is available for a new file */
638 {
639 UINT i;
640
641 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
642 return (i == _FS_LOCK) ? 0 : 1;
643 }
644
645
646 static
647 UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */
648 DIR* dj, /* Directory object pointing the file to register or increment */
649 int acc /* Desired access mode (0:Read, !0:Write) */
650 )
651 {
652 UINT i;
653
654
655 for (i = 0; i < _FS_LOCK; i++) { /* Find the file */
656 if (Files[i].fs == dj->fs &&
657 Files[i].clu == dj->sclust &&
658 Files[i].idx == dj->index) break;
659 }
660
661 if (i == _FS_LOCK) { /* Not opened. Register it as new. */
662 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
663 if (i == _FS_LOCK) return 0; /* No space to register (int err) */
664 Files[i].fs = dj->fs;
665 Files[i].clu = dj->sclust;
666 Files[i].idx = dj->index;
667 Files[i].ctr = 0;
668 }
669
670 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */
671
672 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
673
674 return i + 1;
675 }
676
677
678 static
679 FRESULT dec_lock ( /* Decrement file open counter */
680 UINT i /* Semaphore index */
681 )
682 {
683 WORD n;
684 FRESULT res;
685
686
687 if (--i < _FS_LOCK) {
688 n = Files[i].ctr;
689 if (n == 0x100) n = 0;
690 if (n) n--;
691 Files[i].ctr = n;
692 if (!n) Files[i].fs = 0;
693 res = FR_OK;
694 } else {
695 res = FR_INT_ERR;
696 }
697 return res;
698 }
699
700
701 static
702 void clear_lock ( /* Clear lock entries of the volume */
703 FATFS *fs
704 )
705 {
706 UINT i;
707
708 for (i = 0; i < _FS_LOCK; i++) {
709 if (Files[i].fs == fs) Files[i].fs = 0;
710 }
711 }
712 #endif
713
714
715
716 /*-----------------------------------------------------------------------*/
717 /* Change window offset */
718 /*-----------------------------------------------------------------------*/
719
720 static
721 FRESULT move_window (
722 FATFS *fs, /* File system object */
723 DWORD sector /* Sector number to make appearance in the fs->win[] */
724 ) /* Move to zero only writes back dirty window */
725 {
726 DWORD wsect;
727
728
729 wsect = fs->winsect;
730 if (wsect != sector) { /* Changed current window */
731 #if !_FS_READONLY
732 if (fs->wflag) { /* Write back dirty window if needed */
733 if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK)
734 return FR_DISK_ERR;
735 fs->wflag = 0;
736 if (wsect < (fs->fatbase + fs->fsize)) { /* In FAT area */
737 BYTE nf;
738 for (nf = fs->n_fats; nf > 1; nf--) { /* Reflect the change to all FAT copies */
739 wsect += fs->fsize;
740 disk_write(fs->drv, fs->win, wsect, 1);
741 }
742 }
743 }
744 #endif
745 if (sector) {
746 if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK)
747 return FR_DISK_ERR;
748 fs->winsect = sector;
749 }
750 }
751
752 return FR_OK;
753 }
754
755
756
757
758 /*-----------------------------------------------------------------------*/
759 /* Clean-up cached data */
760 /*-----------------------------------------------------------------------*/
761 #if !_FS_READONLY
762 static
763 FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */
764 FATFS *fs /* File system object */
765 )
766 {
767 FRESULT res;
768
769
770 res = move_window(fs, 0);
771 if (res == FR_OK) {
772 /* Update FSInfo sector if needed */
773 if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
774 fs->winsect = 0;
775 /* Create FSInfo structure */
776 mem_set(fs->win, 0, 512);
777 ST_WORD(fs->win+BS_55AA, 0xAA55);
778 ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
779 ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
780 ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
781 ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
782 /* Write it into the FSInfo sector */
783 disk_write(fs->drv, fs->win, fs->fsi_sector, 1);
784 fs->fsi_flag = 0;
785 }
786 /* Make sure that no pending write process in the physical drive */
787 if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
788 res = FR_DISK_ERR;
789 }
790
791 return res;
792 }
793 #endif
794
795
796
797
798 /*-----------------------------------------------------------------------*/
799 /* Get sector# from cluster# */
800 /*-----------------------------------------------------------------------*/
801
802
803 DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
804 FATFS *fs, /* File system object */
805 DWORD clst /* Cluster# to be converted */
806 )
807 {
808 clst -= 2;
809 if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */
810 return clst * fs->csize + fs->database;
811 }
812
813
814
815
816 /*-----------------------------------------------------------------------*/
817 /* FAT access - Read value of a FAT entry */
818 /*-----------------------------------------------------------------------*/
819
820
821 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */
822 FATFS *fs, /* File system object */
823 DWORD clst /* Cluster# to get the link information */
824 )
825 {
826 UINT wc, bc;
827 BYTE *p;
828
829
830 if (clst < 2 || clst >= fs->n_fatent) /* Check range */
831 return 1;
832
833 switch (fs->fs_type) {
834 case FS_FAT12 :
835 bc = (UINT)clst; bc += bc / 2;
836 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
837 wc = fs->win[bc % SS(fs)]; bc++;
838 if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
839 wc |= fs->win[bc % SS(fs)] << 8;
840 return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
841
842 case FS_FAT16 :
843 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break;
844 p = &fs->win[clst * 2 % SS(fs)];
845 return LD_WORD(p);
846
847 case FS_FAT32 :
848 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break;
849 p = &fs->win[clst * 4 % SS(fs)];
850 return LD_DWORD(p) & 0x0FFFFFFF;
851 }
852
853 return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */
854 }
855
856
857
858
859 /*-----------------------------------------------------------------------*/
860 /* FAT access - Change value of a FAT entry */
861 /*-----------------------------------------------------------------------*/
862 #if !_FS_READONLY
863
864 FRESULT put_fat (
865 FATFS *fs, /* File system object */
866 DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */
867 DWORD val /* New value to mark the cluster */
868 )
869 {
870 UINT bc;
871 BYTE *p;
872 FRESULT res;
873
874
875 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
876 res = FR_INT_ERR;
877
878 } else {
879 switch (fs->fs_type) {
880 case FS_FAT12 :
881 bc = (UINT)clst; bc += bc / 2;
882 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
883 if (res != FR_OK) break;
884 p = &fs->win[bc % SS(fs)];
885 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
886 bc++;
887 fs->wflag = 1;
888 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
889 if (res != FR_OK) break;
890 p = &fs->win[bc % SS(fs)];
891 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
892 break;
893
894 case FS_FAT16 :
895 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
896 if (res != FR_OK) break;
897 p = &fs->win[clst * 2 % SS(fs)];
898 ST_WORD(p, (WORD)val);
899 break;
900
901 case FS_FAT32 :
902 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
903 if (res != FR_OK) break;
904 p = &fs->win[clst * 4 % SS(fs)];
905 val |= LD_DWORD(p) & 0xF0000000;
906 ST_DWORD(p, val);
907 break;
908
909 default :
910 res = FR_INT_ERR;
911 }
912 fs->wflag = 1;
913 }
914
915 return res;
916 }
917 #endif /* !_FS_READONLY */
918
919
920
921
922 /*-----------------------------------------------------------------------*/
923 /* FAT handling - Remove a cluster chain */
924 /*-----------------------------------------------------------------------*/
925 #if !_FS_READONLY
926 static
927 FRESULT remove_chain (
928 FATFS *fs, /* File system object */
929 DWORD clst /* Cluster# to remove a chain from */
930 )
931 {
932 FRESULT res;
933 DWORD nxt;
934 #if _USE_ERASE
935 DWORD scl = clst, ecl = clst, rt[2];
936 #endif
937
938 if (clst < 2 || clst >= fs->n_fatent) { /* Check range */
939 res = FR_INT_ERR;
940
941 } else {
942 res = FR_OK;
943 while (clst < fs->n_fatent) { /* Not a last link? */
944 nxt = get_fat(fs, clst); /* Get cluster status */
945 if (nxt == 0) break; /* Empty cluster? */
946 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
947 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
948 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
949 if (res != FR_OK) break;
950 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */
951 fs->free_clust++;
952 fs->fsi_flag = 1;
953 }
954 #if _USE_ERASE
955 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
956 ecl = nxt;
957 } else { /* End of contiguous clusters */
958 rt[0] = clust2sect(fs, scl); /* Start sector */
959 rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */
960 disk_ioctl(fs->drv, CTRL_ERASE_SECTOR, rt); /* Erase the block */
961 scl = ecl = nxt;
962 }
963 #endif
964 clst = nxt; /* Next cluster */
965 }
966 }
967
968 return res;
969 }
970 #endif
971
972
973
974
975 /*-----------------------------------------------------------------------*/
976 /* FAT handling - Stretch or Create a cluster chain */
977 /*-----------------------------------------------------------------------*/
978 #if !_FS_READONLY
979 static
980 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
981 FATFS *fs, /* File system object */
982 DWORD clst /* Cluster# to stretch. 0 means create a new chain. */
983 )
984 {
985 DWORD cs, ncl, scl;
986 FRESULT res;
987
988
989 if (clst == 0) { /* Create a new chain */
990 scl = fs->last_clust; /* Get suggested start point */
991 if (!scl || scl >= fs->n_fatent) scl = 1;
992 }
993 else { /* Stretch the current chain */
994 cs = get_fat(fs, clst); /* Check the cluster status */
995 if (cs < 2) return 1; /* It is an invalid cluster */
996 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
997 scl = clst;
998 }
999
1000 ncl = scl; /* Start cluster */
1001 for (;;) {
1002 ncl++; /* Next cluster */
1003 if (ncl >= fs->n_fatent) { /* Wrap around */
1004 ncl = 2;
1005 if (ncl > scl) return 0; /* No free cluster */
1006 }
1007 cs = get_fat(fs, ncl); /* Get the cluster status */
1008 if (cs == 0) break; /* Found a free cluster */
1009 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */
1010 return cs;
1011 if (ncl == scl) return 0; /* No free cluster */
1012 }
1013
1014 res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */
1015 if (res == FR_OK && clst != 0) {
1016 res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */
1017 }
1018 if (res == FR_OK) {
1019 fs->last_clust = ncl; /* Update FSINFO */
1020 if (fs->free_clust != 0xFFFFFFFF) {
1021 fs->free_clust--;
1022 fs->fsi_flag = 1;
1023 }
1024 } else {
1025 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
1026 }
1027
1028 return ncl; /* Return new cluster number or error code */
1029 }
1030 #endif /* !_FS_READONLY */
1031
1032
1033
1034 /*-----------------------------------------------------------------------*/
1035 /* FAT handling - Convert offset into cluster with link map table */
1036 /*-----------------------------------------------------------------------*/
1037
1038 #if _USE_FASTSEEK
1039 static
1040 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
1041 FIL* fp, /* Pointer to the file object */
1042 DWORD ofs /* File offset to be converted to cluster# */
1043 )
1044 {
1045 DWORD cl, ncl, *tbl;
1046
1047
1048 tbl = fp->cltbl + 1; /* Top of CLMT */
1049 cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */
1050 for (;;) {
1051 ncl = *tbl++; /* Number of cluters in the fragment */
1052 if (!ncl) return 0; /* End of table? (error) */
1053 if (cl < ncl) break; /* In this fragment? */
1054 cl -= ncl; tbl++; /* Next fragment */
1055 }
1056 return cl + *tbl; /* Return the cluster number */
1057 }
1058 #endif /* _USE_FASTSEEK */
1059
1060
1061
1062 /*-----------------------------------------------------------------------*/
1063 /* Directory handling - Set directory index */
1064 /*-----------------------------------------------------------------------*/
1065
1066 static
1067 FRESULT dir_sdi (
1068 DIR *dj, /* Pointer to directory object */
1069 WORD idx /* Index of directory table */
1070 )
1071 {
1072 DWORD clst;
1073 WORD ic;
1074
1075
1076 dj->index = idx;
1077 clst = dj->sclust;
1078 if (clst == 1 || clst >= dj->fs->n_fatent) /* Check start cluster range */
1079 return FR_INT_ERR;
1080 if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
1081 clst = dj->fs->dirbase;
1082
1083 if (clst == 0) { /* Static table (root-dir in FAT12/16) */
1084 dj->clust = clst;
1085 if (idx >= dj->fs->n_rootdir) /* Index is out of range */
1086 return FR_INT_ERR;
1087 dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */
1088 }
1089 else { /* Dynamic table (sub-dirs or root-dir in FAT32) */
1090 ic = SS(dj->fs) / SZ_DIR * dj->fs->csize; /* Entries per cluster */
1091 while (idx >= ic) { /* Follow cluster chain */
1092 clst = get_fat(dj->fs, clst); /* Get next cluster */
1093 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1094 if (clst < 2 || clst >= dj->fs->n_fatent) /* Reached to end of table or int error */
1095 return FR_INT_ERR;
1096 idx -= ic;
1097 }
1098 dj->clust = clst;
1099 dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / SZ_DIR); /* Sector# */
1100 }
1101
1102 dj->dir = dj->fs->win + (idx % (SS(dj->fs) / SZ_DIR)) * SZ_DIR; /* Ptr to the entry in the sector */
1103
1104 return FR_OK; /* Seek succeeded */
1105 }
1106
1107
1108
1109
1110 /*-----------------------------------------------------------------------*/
1111 /* Directory handling - Move directory table index next */
1112 /*-----------------------------------------------------------------------*/
1113
1114 static
1115 FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */
1116 DIR *dj, /* Pointer to directory object */
1117 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
1118 )
1119 {
1120 DWORD clst;
1121 WORD i;
1122
1123
1124 stretch = stretch; /* To suppress warning on read-only cfg. */
1125 i = dj->index + 1;
1126 if (!i || !dj->sect) /* Report EOT when index has reached 65535 */
1127 return FR_NO_FILE;
1128
1129 if (!(i % (SS(dj->fs) / SZ_DIR))) { /* Sector changed? */
1130 dj->sect++; /* Next sector */
1131
1132 if (dj->clust == 0) { /* Static table */
1133 if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */
1134 return FR_NO_FILE;
1135 }
1136 else { /* Dynamic table */
1137 if (((i / (SS(dj->fs) / SZ_DIR)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
1138 clst = get_fat(dj->fs, dj->clust); /* Get next cluster */
1139 if (clst <= 1) return FR_INT_ERR;
1140 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1141 if (clst >= dj->fs->n_fatent) { /* When it reached end of dynamic table */
1142 #if !_FS_READONLY
1143 BYTE c;
1144 if (!stretch) return FR_NO_FILE; /* When do not stretch, report EOT */
1145 clst = create_chain(dj->fs, dj->clust); /* Stretch cluster chain */
1146 if (clst == 0) return FR_DENIED; /* No free cluster */
1147 if (clst == 1) return FR_INT_ERR;
1148 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1149 /* Clean-up stretched table */
1150 if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */
1151 mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */
1152 dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */
1153 for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */
1154 dj->fs->wflag = 1;
1155 if (move_window(dj->fs, 0)) return FR_DISK_ERR;
1156 dj->fs->winsect++;
1157 }
1158 dj->fs->winsect -= c; /* Rewind window address */
1159 #else
1160 return FR_NO_FILE; /* Report EOT */
1161 #endif
1162 }
1163 dj->clust = clst; /* Initialize data for new cluster */
1164 dj->sect = clust2sect(dj->fs, clst);
1165 }
1166 }
1167 }
1168
1169 dj->index = i;
1170 dj->dir = dj->fs->win + (i % (SS(dj->fs) / SZ_DIR)) * SZ_DIR;
1171
1172 return FR_OK;
1173 }
1174
1175
1176
1177
1178 /*-----------------------------------------------------------------------*/
1179 /* Directory handling - Load/Store start cluster number */
1180 /*-----------------------------------------------------------------------*/
1181
1182 static
1183 DWORD ld_clust (
1184 FATFS *fs, /* Pointer to the fs object */
1185 BYTE *dir /* Pointer to the directory entry */
1186 )
1187 {
1188 DWORD cl;
1189
1190 cl = LD_WORD(dir+DIR_FstClusLO);
1191 if (fs->fs_type == FS_FAT32)
1192 cl |= (DWORD)LD_WORD(dir+DIR_FstClusHI) << 16;
1193
1194 return cl;
1195 }
1196
1197
1198 #if !_FS_READONLY
1199 static
1200 void st_clust (
1201 BYTE *dir, /* Pointer to the directory entry */
1202 DWORD cl /* Value to be set */
1203 )
1204 {
1205 ST_WORD(dir+DIR_FstClusLO, cl);
1206 ST_WORD(dir+DIR_FstClusHI, cl >> 16);
1207 }
1208 #endif
1209
1210
1211
1212 /*-----------------------------------------------------------------------*/
1213 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
1214 /*-----------------------------------------------------------------------*/
1215 #if _USE_LFN
1216 static
1217 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */
1218
1219
1220 static
1221 int cmp_lfn ( /* 1:Matched, 0:Not matched */
1222 WCHAR *lfnbuf, /* Pointer to the LFN to be compared */
1223 BYTE *dir /* Pointer to the directory entry containing a part of LFN */
1224 )
1225 {
1226 UINT i, s;
1227 WCHAR wc, uc;
1228
1229
1230 i = ((dir[LDIR_Ord] & ~LLE) - 1) * 13; /* Get offset in the LFN buffer */
1231 s = 0; wc = 1;
1232 do {
1233 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
1234 if (wc) { /* Last char has not been processed */
1235 wc = ff_wtoupper(uc); /* Convert it to upper case */
1236 if (i >= _MAX_LFN || wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */
1237 return 0; /* Not matched */
1238 } else {
1239 if (uc != 0xFFFF) return 0; /* Check filler */
1240 }
1241 } while (++s < 13); /* Repeat until all chars in the entry are checked */
1242
1243 if ((dir[LDIR_Ord] & LLE) && wc && lfnbuf[i]) /* Last segment matched but different length */
1244 return 0;
1245
1246 return 1; /* The part of LFN matched */
1247 }
1248
1249
1250
1251 static
1252 int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */
1253 WCHAR *lfnbuf, /* Pointer to the Unicode-LFN buffer */
1254 BYTE *dir /* Pointer to the directory entry */
1255 )
1256 {
1257 UINT i, s;
1258 WCHAR wc, uc;
1259
1260
1261 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1262
1263 s = 0; wc = 1;
1264 do {
1265 uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
1266 if (wc) { /* Last char has not been processed */
1267 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
1268 lfnbuf[i++] = wc = uc; /* Store it */
1269 } else {
1270 if (uc != 0xFFFF) return 0; /* Check filler */
1271 }
1272 } while (++s < 13); /* Read all character in the entry */
1273
1274 if (dir[LDIR_Ord] & LLE) { /* Put terminator if it is the last LFN part */
1275 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
1276 lfnbuf[i] = 0;
1277 }
1278
1279 return 1;
1280 }
1281
1282
1283 #if !_FS_READONLY
1284 static
1285 void fit_lfn (
1286 const WCHAR *lfnbuf, /* Pointer to the LFN buffer */
1287 BYTE *dir, /* Pointer to the directory entry */
1288 BYTE ord, /* LFN order (1-20) */
1289 BYTE sum /* SFN sum */
1290 )
1291 {
1292 UINT i, s;
1293 WCHAR wc;
1294
1295
1296 dir[LDIR_Chksum] = sum; /* Set check sum */
1297 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
1298 dir[LDIR_T] = 0;
1299 ST_WORD(dir+LDIR_FstClusLO, 0);
1300
1301 i = (ord - 1) * 13; /* Get offset in the LFN buffer */
1302 s = wc = 0;
1303 do {
1304 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */
1305 ST_WORD(dir+LfnOfs[s], wc); /* Put it */
1306 if (!wc) wc = 0xFFFF; /* Padding chars following last char */
1307 } while (++s < 13);
1308 if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLE; /* Bottom LFN part is the start of LFN sequence */
1309 dir[LDIR_Ord] = ord; /* Set the LFN order */
1310 }
1311
1312 #endif
1313 #endif
1314
1315
1316
1317 /*-----------------------------------------------------------------------*/
1318 /* Create numbered name */
1319 /*-----------------------------------------------------------------------*/
1320 #if _USE_LFN
1321 void gen_numname (
1322 BYTE *dst, /* Pointer to generated SFN */
1323 const BYTE *src, /* Pointer to source SFN to be modified */
1324 const WCHAR *lfn, /* Pointer to LFN */
1325 WORD seq /* Sequence number */
1326 )
1327 {
1328 BYTE ns[8], c;
1329 UINT i, j;
1330
1331
1332 mem_cpy(dst, src, 11);
1333
1334 if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */
1335 do seq = (seq >> 1) + (seq << 15) + (WORD)*lfn++; while (*lfn);
1336 }
1337
1338 /* itoa (hexdecimal) */
1339 i = 7;
1340 do {
1341 c = (seq % 16) + '0';
1342 if (c > '9') c += 7;
1343 ns[i--] = c;
1344 seq /= 16;
1345 } while (seq);
1346 ns[i] = '~';
1347
1348 /* Append the number */
1349 for (j = 0; j < i && dst[j] != ' '; j++) {
1350 if (IsDBCS1(dst[j])) {
1351 if (j == i - 1) break;
1352 j++;
1353 }
1354 }
1355 do {
1356 dst[j++] = (i < 8) ? ns[i++] : ' ';
1357 } while (j < 8);
1358 }
1359 #endif
1360
1361
1362
1363
1364 /*-----------------------------------------------------------------------*/
1365 /* Calculate sum of an SFN */
1366 /*-----------------------------------------------------------------------*/
1367 #if _USE_LFN
1368 static
1369 BYTE sum_sfn (
1370 const BYTE *dir /* Ptr to directory entry */
1371 )
1372 {
1373 BYTE sum = 0;
1374 UINT n = 11;
1375
1376 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
1377 return sum;
1378 }
1379 #endif
1380
1381
1382
1383
1384 /*-----------------------------------------------------------------------*/
1385 /* Directory handling - Find an object in the directory */
1386 /*-----------------------------------------------------------------------*/
1387
1388 static
1389 FRESULT dir_find (
1390 DIR *dj /* Pointer to the directory object linked to the file name */
1391 )
1392 {
1393 FRESULT res;
1394 BYTE c, *dir;
1395 #if _USE_LFN
1396 BYTE a, ord, sum;
1397 #endif
1398
1399 res = dir_sdi(dj, 0); /* Rewind directory object */
1400 if (res != FR_OK) return res;
1401
1402 #if _USE_LFN
1403 ord = sum = 0xFF;
1404 #endif
1405 do {
1406 res = move_window(dj->fs, dj->sect);
1407 if (res != FR_OK) break;
1408 dir = dj->dir; /* Ptr to the directory entry of current index */
1409 c = dir[DIR_Name];
1410 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
1411 #if _USE_LFN /* LFN configuration */
1412 a = dir[DIR_Attr] & AM_MASK;
1413 if (c == DDE || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
1414 ord = 0xFF;
1415 } else {
1416 if (a == AM_LFN) { /* An LFN entry is found */
1417 if (dj->lfn) {
1418 if (c & LLE) { /* Is it start of LFN sequence? */
1419 sum = dir[LDIR_Chksum];
1420 c &= ~LLE; ord = c; /* LFN start order */
1421 dj->lfn_idx = dj->index;
1422 }
1423 /* Check validity of the LFN entry and compare it with given name */
1424 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
1425 }
1426 } else { /* An SFN entry is found */
1427 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
1428 ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1429 if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */
1430 }
1431 }
1432 #else /* Non LFN configuration */
1433 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
1434 break;
1435 #endif
1436 res = dir_next(dj, 0); /* Next entry */
1437 } while (res == FR_OK);
1438
1439 return res;
1440 }
1441
1442
1443
1444
1445 /*-----------------------------------------------------------------------*/
1446 /* Read an object from the directory */
1447 /*-----------------------------------------------------------------------*/
1448 #if _FS_MINIMIZE <= 1
1449 static
1450 FRESULT dir_read (
1451 DIR *dj /* Pointer to the directory object that pointing the entry to be read */
1452 )
1453 {
1454 FRESULT res;
1455 BYTE c, *dir;
1456 #if _USE_LFN
1457 BYTE a, ord = 0xFF, sum = 0xFF;
1458 #endif
1459
1460 res = FR_NO_FILE;
1461 while (dj->sect) {
1462 res = move_window(dj->fs, dj->sect);
1463 if (res != FR_OK) break;
1464 dir = dj->dir; /* Ptr to the directory entry of current index */
1465 c = dir[DIR_Name];
1466 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
1467 #if _USE_LFN /* LFN configuration */
1468 a = dir[DIR_Attr] & AM_MASK;
1469 if (c == DDE || (!_FS_RPATH && c == '.') || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
1470 ord = 0xFF;
1471 } else {
1472 if (a == AM_LFN) { /* An LFN entry is found */
1473 if (c & LLE) { /* Is it start of LFN sequence? */
1474 sum = dir[LDIR_Chksum];
1475 c &= ~LLE; ord = c;
1476 dj->lfn_idx = dj->index;
1477 }
1478 /* Check LFN validity and capture it */
1479 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
1480 } else { /* An SFN entry is found */
1481 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
1482 dj->lfn_idx = 0xFFFF; /* It has no LFN. */
1483 break;
1484 }
1485 }
1486 #else /* Non LFN configuration */
1487 if (c != DDE && (_FS_RPATH || c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */
1488 break;
1489 #endif
1490 res = dir_next(dj, 0); /* Next entry */
1491 if (res != FR_OK) break;
1492 }
1493
1494 if (res != FR_OK) dj->sect = 0;
1495
1496 return res;
1497 }
1498 #endif
1499
1500
1501
1502 /*-----------------------------------------------------------------------*/
1503 /* Register an object to the directory */
1504 /*-----------------------------------------------------------------------*/
1505 #if !_FS_READONLY
1506 static
1507 FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
1508 DIR *dj /* Target directory with object name to be created */
1509 )
1510 {
1511 FRESULT res;
1512 BYTE c, *dir;
1513 #if _USE_LFN /* LFN configuration */
1514 WORD n, ne, is;
1515 BYTE sn[12], *fn, sum;
1516 WCHAR *lfn;
1517
1518
1519 fn = dj->fn; lfn = dj->lfn;
1520 mem_cpy(sn, fn, 12);
1521
1522 if (_FS_RPATH && (sn[NS] & NS_DOT)) /* Cannot create dot entry */
1523 return FR_INVALID_NAME;
1524
1525 if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
1526 fn[NS] = 0; dj->lfn = 0; /* Find only SFN */
1527 for (n = 1; n < 100; n++) {
1528 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
1529 res = dir_find(dj); /* Check if the name collides with existing SFN */
1530 if (res != FR_OK) break;
1531 }
1532 if (n == 100) return FR_DENIED; /* Abort if too many collisions */
1533 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
1534 fn[NS] = sn[NS]; dj->lfn = lfn;
1535 }
1536
1537 if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve an SFN + LFN entries. */
1538 for (ne = 0; lfn[ne]; ne++) ;
1539 ne = (ne + 25) / 13;
1540 } else { /* Otherwise reserve only an SFN entry. */
1541 ne = 1;
1542 }
1543
1544 /* Reserve contiguous entries */
1545 res = dir_sdi(dj, 0);
1546 if (res != FR_OK) return res;
1547 n = is = 0;
1548 do {
1549 res = move_window(dj->fs, dj->sect);
1550 if (res != FR_OK) break;
1551 c = *dj->dir; /* Check the entry status */
1552 if (c == DDE || c == 0) { /* Is it a blank entry? */
1553 if (n == 0) is = dj->index; /* First index of the contiguous entry */
1554 if (++n == ne) break; /* A contiguous entry that required count is found */
1555 } else {
1556 n = 0; /* Not a blank entry. Restart to search */
1557 }
1558 res = dir_next(dj, 1); /* Next entry with table stretch */
1559 } while (res == FR_OK);
1560
1561 if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */
1562 res = dir_sdi(dj, is);
1563 if (res == FR_OK) {
1564 sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */
1565 ne--;
1566 do { /* Store LFN entries in bottom first */
1567 res = move_window(dj->fs, dj->sect);
1568 if (res != FR_OK) break;
1569 fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
1570 dj->fs->wflag = 1;
1571 res = dir_next(dj, 0); /* Next entry */
1572 } while (res == FR_OK && --ne);
1573 }
1574 }
1575
1576 #else /* Non LFN configuration */
1577 res = dir_sdi(dj, 0);
1578 if (res == FR_OK) {
1579 do { /* Find a blank entry for the SFN */
1580 res = move_window(dj->fs, dj->sect);
1581 if (res != FR_OK) break;
1582 c = *dj->dir;
1583 if (c == DDE || c == 0) break; /* Is it a blank entry? */
1584 res = dir_next(dj, 1); /* Next entry with table stretch */
1585 } while (res == FR_OK);
1586 }
1587 #endif
1588
1589 if (res == FR_OK) { /* Initialize the SFN entry */
1590 res = move_window(dj->fs, dj->sect);
1591 if (res == FR_OK) {
1592 dir = dj->dir;
1593 mem_set(dir, 0, SZ_DIR); /* Clean the entry */
1594 mem_cpy(dir, dj->fn, 11); /* Put SFN */
1595 #if _USE_LFN
1596 dir[DIR_NTres] = *(dj->fn+NS) & (NS_BODY | NS_EXT); /* Put NT flag */
1597 #endif
1598 dj->fs->wflag = 1;
1599 }
1600 }
1601
1602 return res;
1603 }
1604 #endif /* !_FS_READONLY */
1605
1606
1607
1608
1609 /*-----------------------------------------------------------------------*/
1610 /* Remove an object from the directory */
1611 /*-----------------------------------------------------------------------*/
1612 #if !_FS_READONLY && !_FS_MINIMIZE
1613 static
1614 FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */
1615 DIR *dj /* Directory object pointing the entry to be removed */
1616 )
1617 {
1618 FRESULT res;
1619 #if _USE_LFN /* LFN configuration */
1620 WORD i;
1621
1622 i = dj->index; /* SFN index */
1623 res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */
1624 if (res == FR_OK) {
1625 do {
1626 res = move_window(dj->fs, dj->sect);
1627 if (res != FR_OK) break;
1628 *dj->dir = DDE; /* Mark the entry "deleted" */
1629 dj->fs->wflag = 1;
1630 if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
1631 res = dir_next(dj, 0); /* Next entry */
1632 } while (res == FR_OK);
1633 if (res == FR_NO_FILE) res = FR_INT_ERR;
1634 }
1635
1636 #else /* Non LFN configuration */
1637 res = dir_sdi(dj, dj->index);
1638 if (res == FR_OK) {
1639 res = move_window(dj->fs, dj->sect);
1640 if (res == FR_OK) {
1641 *dj->dir = DDE; /* Mark the entry "deleted" */
1642 dj->fs->wflag = 1;
1643 }
1644 }
1645 #endif
1646
1647 return res;
1648 }
1649 #endif /* !_FS_READONLY */
1650
1651
1652
1653
1654 /*-----------------------------------------------------------------------*/
1655 /* Pick a segment and create the object name in directory form */
1656 /*-----------------------------------------------------------------------*/
1657
1658 static
1659 FRESULT create_name (
1660 DIR *dj, /* Pointer to the directory object */
1661 const TCHAR **path /* Pointer to pointer to the segment in the path string */
1662 )
1663 {
1664 #ifdef _EXCVT
1665 static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */
1666 #endif
1667
1668 #if _USE_LFN /* LFN configuration */
1669 BYTE b, cf;
1670 WCHAR w, *lfn;
1671 UINT i, ni, si, di;
1672 const TCHAR *p;
1673
1674 /* Create LFN in Unicode */
1675 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
1676 lfn = dj->lfn;
1677 si = di = 0;
1678 for (;;) {
1679 w = p[si++]; /* Get a character */
1680 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */
1681 if (di >= _MAX_LFN) /* Reject too long name */
1682 return FR_INVALID_NAME;
1683 #if !_LFN_UNICODE
1684 w &= 0xFF;
1685 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
1686 b = (BYTE)p[si++]; /* Get 2nd byte */
1687 if (!IsDBCS2(b))
1688 return FR_INVALID_NAME; /* Reject invalid sequence */
1689 w = (w << 8) + b; /* Create a DBC */
1690 }
1691 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */
1692 if (!w) return FR_INVALID_NAME; /* Reject invalid code */
1693 #endif
1694 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal chars for LFN */
1695 return FR_INVALID_NAME;
1696 lfn[di++] = w; /* Store the Unicode char */
1697 }
1698 *path = &p[si]; /* Return pointer to the next segment */
1699 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
1700 #if _FS_RPATH
1701 if ((di == 1 && lfn[di-1] == '.') || /* Is this a dot entry? */
1702 (di == 2 && lfn[di-1] == '.' && lfn[di-2] == '.')) {
1703 lfn[di] = 0;
1704 for (i = 0; i < 11; i++)
1705 dj->fn[i] = (i < di) ? '.' : ' ';
1706 dj->fn[i] = cf | NS_DOT; /* This is a dot entry */
1707 return FR_OK;
1708 }
1709 #endif
1710 while (di) { /* Strip trailing spaces and dots */
1711 w = lfn[di-1];
1712 if (w != ' ' && w != '.') break;
1713 di--;
1714 }
1715 if (!di) return FR_INVALID_NAME; /* Reject nul string */
1716
1717 lfn[di] = 0; /* LFN is created */
1718
1719 /* Create SFN in directory form */
1720 mem_set(dj->fn, ' ', 11);
1721 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
1722 if (si) cf |= NS_LOSS | NS_LFN;
1723 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
1724
1725 b = i = 0; ni = 8;
1726 for (;;) {
1727 w = lfn[si++]; /* Get an LFN char */
1728 if (!w) break; /* Break on end of the LFN */
1729 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
1730 cf |= NS_LOSS | NS_LFN; continue;
1731 }
1732
1733 if (i >= ni || si == di) { /* Extension or end of SFN */
1734 if (ni == 11) { /* Long extension */
1735 cf |= NS_LOSS | NS_LFN; break;
1736 }
1737 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
1738 if (si > di) break; /* No extension */
1739 si = di; i = 8; ni = 11; /* Enter extension section */
1740 b <<= 2; continue;
1741 }
1742
1743 if (w >= 0x80) { /* Non ASCII char */
1744 #ifdef _EXCVT
1745 w = ff_convert(w, 0); /* Unicode -> OEM code */
1746 if (w) w = excvt[w - 0x80]; /* Convert extended char to upper (SBCS) */
1747 #else
1748 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
1749 #endif
1750 cf |= NS_LFN; /* Force create LFN entry */
1751 }
1752
1753 if (_DF1S && w >= 0x100) { /* Double byte char (always false on SBCS cfg) */
1754 if (i >= ni - 1) {
1755 cf |= NS_LOSS | NS_LFN; i = ni; continue;
1756 }
1757 dj->fn[i++] = (BYTE)(w >> 8);
1758 } else { /* Single byte char */
1759 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal chars for SFN */
1760 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
1761 } else {
1762 if (IsUpper(w)) { /* ASCII large capital */
1763 b |= 2;
1764 } else {
1765 if (IsLower(w)) { /* ASCII small capital */
1766 b |= 1; w -= 0x20;
1767 }
1768 }
1769 }
1770 }
1771 dj->fn[i++] = (BYTE)w;
1772 }
1773
1774 if (dj->fn[0] == DDE) dj->fn[0] = NDDE; /* If the first char collides with deleted mark, replace it with 0x05 */
1775
1776 if (ni == 8) b <<= 2;
1777 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
1778 cf |= NS_LFN;
1779 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */
1780 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
1781 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
1782 }
1783
1784 dj->fn[NS] = cf; /* SFN is created */
1785
1786 return FR_OK;
1787
1788
1789 #else /* Non-LFN configuration */
1790 BYTE b, c, d, *sfn;
1791 UINT ni, si, i;
1792 const char *p;
1793
1794 /* Create file name in directory form */
1795 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
1796 sfn = dj->fn;
1797 mem_set(sfn, ' ', 11);
1798 si = i = b = 0; ni = 8;
1799 #if _FS_RPATH
1800 if (p[si] == '.') { /* Is this a dot entry? */
1801 for (;;) {
1802 c = (BYTE)p[si++];
1803 if (c != '.' || si >= 3) break;
1804 sfn[i++] = c;
1805 }
1806 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
1807 *path = &p[si]; /* Return pointer to the next segment */
1808 sfn[NS] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */
1809 return FR_OK;
1810 }
1811 #endif
1812 for (;;) {
1813 c = (BYTE)p[si++];
1814 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */
1815 if (c == '.' || i >= ni) {
1816 if (ni != 8 || c != '.') return FR_INVALID_NAME;
1817 i = 8; ni = 11;
1818 b <<= 2; continue;
1819 }
1820 if (c >= 0x80) { /* Extended char? */
1821 b |= 3; /* Eliminate NT flag */
1822 #ifdef _EXCVT
1823 c = excvt[c - 0x80]; /* Upper conversion (SBCS) */
1824 #else
1825 #if !_DF1S /* ASCII only cfg */
1826 return FR_INVALID_NAME;
1827 #endif
1828 #endif
1829 }
1830 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
1831 d = (BYTE)p[si++]; /* Get 2nd byte */
1832 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
1833 return FR_INVALID_NAME;
1834 sfn[i++] = c;
1835 sfn[i++] = d;
1836 } else { /* Single byte code */
1837 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */
1838 return FR_INVALID_NAME;
1839 if (IsUpper(c)) { /* ASCII large capital? */
1840 b |= 2;
1841 } else {
1842 if (IsLower(c)) { /* ASCII small capital? */
1843 b |= 1; c -= 0x20;
1844 }
1845 }
1846 sfn[i++] = c;
1847 }
1848 }
1849 *path = &p[si]; /* Return pointer to the next segment */
1850 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
1851
1852 if (!i) return FR_INVALID_NAME; /* Reject nul string */
1853 if (sfn[0] == DDE) sfn[0] = NDDE; /* When first char collides with DDE, replace it with 0x05 */
1854
1855 if (ni == 8) b <<= 2;
1856 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */
1857 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */
1858
1859 sfn[NS] = c; /* Store NT flag, File name is created */
1860
1861 return FR_OK;
1862 #endif
1863 }
1864
1865
1866
1867
1868 /*-----------------------------------------------------------------------*/
1869 /* Get file information from directory entry */
1870 /*-----------------------------------------------------------------------*/
1871 #if _FS_MINIMIZE <= 1
1872 static
1873 void get_fileinfo ( /* No return code */
1874 DIR *dj, /* Pointer to the directory object */
1875 FILINFO *fno /* Pointer to the file information to be filled */
1876 )
1877 {
1878 UINT i;
1879 BYTE nt, *dir;
1880 TCHAR *p, c;
1881
1882
1883 p = fno->fname;
1884 if (dj->sect) {
1885 dir = dj->dir;
1886 nt = dir[DIR_NTres]; /* NT flag */
1887 for (i = 0; i < 8; i++) { /* Copy name body */
1888 c = dir[i];
1889 if (c == ' ') break;
1890 if (c == NDDE) c = (TCHAR)DDE;
1891 if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20;
1892 #if _LFN_UNICODE
1893 if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i+1]))
1894 c = (c << 8) | dir[++i];
1895 c = ff_convert(c, 1);
1896 if (!c) c = '?';
1897 #endif
1898 *p++ = c;
1899 }
1900 if (dir[8] != ' ') { /* Copy name extension */
1901 *p++ = '.';
1902 for (i = 8; i < 11; i++) {
1903 c = dir[i];
1904 if (c == ' ') break;
1905 if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20;
1906 #if _LFN_UNICODE
1907 if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i+1]))
1908 c = (c << 8) | dir[++i];
1909 c = ff_convert(c, 1);
1910 if (!c) c = '?';
1911 #endif
1912 *p++ = c;
1913 }
1914 }
1915 fno->fattrib = dir[DIR_Attr]; /* Attribute */
1916 fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */
1917 fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */
1918 fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */
1919 }
1920 *p = 0; /* Terminate SFN str by a \0 */
1921
1922 #if _USE_LFN
1923 if (fno->lfname && fno->lfsize) {
1924 TCHAR *tp = fno->lfname;
1925 WCHAR w, *lfn;
1926
1927 i = 0;
1928 if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
1929 lfn = dj->lfn;
1930 while ((w = *lfn++) != 0) { /* Get an LFN char */
1931 #if !_LFN_UNICODE
1932 w = ff_convert(w, 0); /* Unicode -> OEM conversion */
1933 if (!w) { i = 0; break; } /* Could not convert, no LFN */
1934 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
1935 tp[i++] = (TCHAR)(w >> 8);
1936 #endif
1937 if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overflow, no LFN */
1938 tp[i++] = (TCHAR)w;
1939 }
1940 }
1941 tp[i] = 0; /* Terminate the LFN str by a \0 */
1942 }
1943 #endif
1944 }
1945 #endif /* _FS_MINIMIZE <= 1 */
1946
1947
1948
1949
1950 /*-----------------------------------------------------------------------*/
1951 /* Follow a file path */
1952 /*-----------------------------------------------------------------------*/
1953
1954 static
1955 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
1956 DIR *dj, /* Directory object to return last directory and found object */
1957 const TCHAR *path /* Full-path string to find a file or directory */
1958 )
1959 {
1960 FRESULT res;
1961 BYTE *dir, ns;
1962
1963
1964 #if _FS_RPATH
1965 if (*path == '/' || *path == '\\') { /* There is a heading separator */
1966 path++; dj->sclust = 0; /* Strip it and start from the root dir */
1967 } else { /* No heading separator */
1968 dj->sclust = dj->fs->cdir; /* Start from the current dir */
1969 }
1970 #else
1971 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
1972 path++;
1973 dj->sclust = 0; /* Start from the root dir */
1974 #endif
1975
1976 if ((UINT)*path < ' ') { /* Nul path means the start directory itself */
1977 res = dir_sdi(dj, 0);
1978 dj->dir = 0;
1979 } else { /* Follow path */
1980 for (;;) {
1981 res = create_name(dj, &path); /* Get a segment */
1982 if (res != FR_OK) break;
1983 res = dir_find(dj); /* Find it */
1984 ns = *(dj->fn+NS);
1985 if (res != FR_OK) { /* Failed to find the object */
1986 if (res != FR_NO_FILE) break; /* Abort if any hard error occurred */
1987 /* Object not found */
1988 if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exit */
1989 dj->sclust = 0; dj->dir = 0; /* It is the root dir */
1990 res = FR_OK;
1991 if (!(ns & NS_LAST)) continue;
1992 } else { /* Could not find the object */
1993 if (!(ns & NS_LAST)) res = FR_NO_PATH;
1994 }
1995 break;
1996 }
1997 if (ns & NS_LAST) break; /* Last segment match. Function completed. */
1998 dir = dj->dir; /* There is next segment. Follow the sub directory */
1999 if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */
2000 res = FR_NO_PATH; break;
2001 }
2002 dj->sclust = ld_clust(dj->fs, dir);
2003 }
2004 }
2005
2006 return res;
2007 }
2008
2009
2010
2011
2012 /*-----------------------------------------------------------------------*/
2013 /* Load a sector and check if it is an FAT Volume Boot Record */
2014 /*-----------------------------------------------------------------------*/
2015
2016 static
2017 BYTE check_fs ( /* 0:FAT-VBR, 1:Any BR but not FAT, 2:Not a BR, 3:Disk error */
2018 FATFS *fs, /* File system object */
2019 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
2020 )
2021 {
2022 if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK) /* Load boot record */
2023 return 3;
2024 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */
2025 return 2;
2026
2027 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
2028 return 0;
2029 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
2030 return 0;
2031
2032 return 1;
2033 }
2034
2035
2036
2037
2038 /*-----------------------------------------------------------------------*/
2039 /* Check if the file system object is valid or not */
2040 /*-----------------------------------------------------------------------*/
2041
2042 static
2043 FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occurred */
2044 const TCHAR **path, /* Pointer to pointer to the path name (drive number) */
2045 FATFS **rfs, /* Pointer to pointer to the found file system object */
2046 BYTE wmode /* !=0: Check write protection for write access */
2047 )
2048 {
2049 BYTE fmt, b, pi, *tbl;
2050 UINT vol;
2051 DSTATUS stat;
2052 DWORD bsect, fasize, tsect, sysect, nclst, szbfat;
2053 WORD nrsv;
2054 const TCHAR *p = *path;
2055 FATFS *fs;
2056
2057
2058 /* Get logical drive number from the path name */
2059 vol = p[0] - '0'; /* Is there a drive number? */
2060 if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */
2061 p += 2; *path = p; /* Return pointer to the path name */
2062 } else { /* No drive number is given */
2063 #if _FS_RPATH
2064 vol = CurrVol; /* Use current drive */
2065 #else
2066 vol = 0; /* Use drive 0 */
2067 #endif
2068 }
2069
2070 /* Check if the file system object is valid or not */
2071 *rfs = 0;
2072 if (vol >= _VOLUMES) /* Is the drive number valid? */
2073 return FR_INVALID_DRIVE;
2074 fs = FatFs[vol]; /* Get corresponding file system object */
2075 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
2076
2077 ENTER_FF(fs); /* Lock file system */
2078
2079 *rfs = fs; /* Return pointer to the corresponding file system object */
2080 if (fs->fs_type) { /* If the volume has been mounted */
2081 stat = disk_status(fs->drv);
2082 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */
2083 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */
2084 return FR_WRITE_PROTECTED;
2085 return FR_OK; /* The file system object is valid */
2086 }
2087 }
2088
2089 /* The file system object is not valid. */
2090 /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
2091
2092 fs->fs_type = 0; /* Clear the file system object */
2093 fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */
2094 stat = disk_initialize(fs->drv); /* Initialize the physical drive */
2095 if (stat & STA_NOINIT) /* Check if the initialization succeeded */
2096 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
2097 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */
2098 return FR_WRITE_PROTECTED;
2099 #if _MAX_SS != 512 /* Get disk sector size (variable sector size cfg only) */
2100 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &fs->ssize) != RES_OK)
2101 return FR_DISK_ERR;
2102 #endif
2103 /* Search FAT partition on the drive. Supports only generic partitions, FDISK and SFD. */
2104 fmt = check_fs(fs, bsect = 0); /* Load sector 0 and check if it is an FAT-VBR (in SFD) */
2105 if (LD2PT(vol) && !fmt) fmt = 1; /* Force non-SFD if the volume is forced partition */
2106 if (fmt == 1) { /* Not an FAT-VBR, the physical drive can be partitioned */
2107 /* Check the partition listed in the partition table */
2108 pi = LD2PT(vol);
2109 if (pi) pi--;
2110 tbl = &fs->win[MBR_Table + pi * SZ_PTE];/* Partition table */
2111 if (tbl[4]) { /* Is the partition existing? */
2112 bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */
2113 fmt = check_fs(fs, bsect); /* Check the partition */
2114 }
2115 }
2116 if (fmt == 3) return FR_DISK_ERR;
2117 if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */
2118
2119 /* An FAT volume is found. Following code initializes the file system object */
2120
2121 if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */
2122 return FR_NO_FILESYSTEM;
2123
2124 fasize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */
2125 if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32);
2126 fs->fsize = fasize;
2127
2128 fs->n_fats = b = fs->win[BPB_NumFATs]; /* Number of FAT copies */
2129 if (b != 1 && b != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */
2130 fasize *= b; /* Number of sectors for FAT area */
2131
2132 fs->csize = b = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
2133 if (!b || (b & (b - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */
2134
2135 fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Number of root directory entries */
2136 if (fs->n_rootdir % (SS(fs) / SZ_DIR)) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */
2137
2138 tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */
2139 if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
2140
2141 nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); /* Number of reserved sectors */
2142 if (!nrsv) return FR_NO_FILESYSTEM; /* (BPB_RsvdSecCnt must not be 0) */
2143
2144 /* Determine the FAT sub type */
2145 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIR); /* RSV+FAT+DIR */
2146 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
2147 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
2148 if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
2149 fmt = FS_FAT12;
2150 if (nclst >= MIN_FAT16) fmt = FS_FAT16;
2151 if (nclst >= MIN_FAT32) fmt = FS_FAT32;
2152
2153 /* Boundaries and Limits */
2154 fs->n_fatent = nclst + 2; /* Number of FAT entries */
2155 fs->database = bsect + sysect; /* Data start sector */
2156 fs->fatbase = bsect + nrsv; /* FAT start sector */
2157 if (fmt == FS_FAT32) {
2158 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
2159 fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */
2160 szbfat = fs->n_fatent * 4; /* (Required FAT size) */
2161 } else {
2162 if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
2163 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
2164 szbfat = (fmt == FS_FAT16) ? /* (Required FAT size) */
2165 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
2166 }
2167 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than required) */
2168 return FR_NO_FILESYSTEM;
2169
2170 #if !_FS_READONLY
2171 /* Initialize cluster allocation information */
2172 fs->free_clust = 0xFFFFFFFF;
2173 fs->last_clust = 0;
2174
2175 /* Get fsinfo if available */
2176 if (fmt == FS_FAT32) {
2177 fs->fsi_flag = 0;
2178 fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
2179 if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK &&
2180 LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
2181 LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
2182 LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) {
2183 fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
2184 fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
2185 }
2186 }
2187 #endif
2188 fs->fs_type = fmt; /* FAT sub-type */
2189 fs->id = ++Fsid; /* File system mount ID */
2190 fs->winsect = 0; /* Invalidate sector cache */
2191 fs->wflag = 0;
2192 #if _FS_RPATH
2193 fs->cdir = 0; /* Current directory (root dir) */
2194 #endif
2195 #if _FS_LOCK /* Clear file lock semaphores */
2196 clear_lock(fs);
2197 #endif
2198
2199 return FR_OK;
2200 }
2201
2202
2203
2204
2205 /*-----------------------------------------------------------------------*/
2206 /* Check if the file/dir object is valid or not */
2207 /*-----------------------------------------------------------------------*/
2208
2209 static
2210 FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
2211 void* obj /* Pointer to the object FIL/DIR to check validity */
2212 )
2213 {
2214 FIL *fil;
2215
2216
2217 fil = (FIL*)obj; /* Assuming offset of fs and id in the FIL/DIR is identical */
2218 if (!fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id)
2219 return FR_INVALID_OBJECT;
2220
2221 ENTER_FF(fil->fs); /* Lock file system */
2222
2223 if (disk_status(fil->fs->drv) & STA_NOINIT)
2224 return FR_NOT_READY;
2225
2226 return FR_OK;
2227 }
2228
2229
2230
2231
2232 /*--------------------------------------------------------------------------
2233
2234 Public Functions
2235
2236 --------------------------------------------------------------------------*/
2237
2238
2239
2240 /*-----------------------------------------------------------------------*/
2241 /* Mount/Unmount a Logical Drive */
2242 /*-----------------------------------------------------------------------*/
2243
2244 FRESULT f_mount (
2245 BYTE vol, /* Logical drive number to be mounted/unmounted */
2246 FATFS *fs /* Pointer to new file system object (NULL for unmount)*/
2247 )
2248 {
2249 FATFS *rfs;
2250
2251
2252 if (vol >= _VOLUMES) /* Check if the drive number is valid */
2253 return FR_INVALID_DRIVE;
2254 rfs = FatFs[vol]; /* Get current fs object */
2255
2256 if (rfs) {
2257 #if _FS_LOCK
2258 clear_lock(rfs);
2259 #endif
2260 #if _FS_REENTRANT /* Discard sync object of the current volume */
2261 if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR;
2262 #endif
2263 rfs->fs_type = 0; /* Clear old fs object */
2264 }
2265
2266 if (fs) {
2267 fs->fs_type = 0; /* Clear new fs object */
2268 #if _FS_REENTRANT /* Create sync object for the new volume */
2269 if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
2270 #endif
2271 }
2272 FatFs[vol] = fs; /* Register new fs object */
2273
2274 return FR_OK;
2275 }
2276
2277
2278
2279
2280 /*-----------------------------------------------------------------------*/
2281 /* Open or Create a File */
2282 /*-----------------------------------------------------------------------*/
2283
2284 FRESULT f_open (
2285 FIL *fp, /* Pointer to the blank file object */
2286 const TCHAR *path, /* Pointer to the file name */
2287 BYTE mode /* Access mode and file open mode flags */
2288 )
2289 {
2290 FRESULT res;
2291 DIR dj;
2292 BYTE *dir;
2293 DEF_NAMEBUF;
2294
2295
2296 if (!fp) return FR_INVALID_OBJECT;
2297 fp->fs = 0; /* Clear file object */
2298
2299 #if !_FS_READONLY
2300 mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
2301 res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ));
2302 #else
2303 mode &= FA_READ;
2304 res = chk_mounted(&path, &dj.fs, 0);
2305 #endif
2306 if (res == FR_OK) {
2307 INIT_BUF(dj);
2308 res = follow_path(&dj, path); /* Follow the file path */
2309 dir = dj.dir;
2310 #if !_FS_READONLY /* R/W configuration */
2311 if (res == FR_OK) {
2312 if (!dir) /* Current dir itself */
2313 res = FR_INVALID_NAME;
2314 #if _FS_LOCK
2315 else
2316 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2317 #endif
2318 }
2319 /* Create or Open a file */
2320 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
2321 DWORD dw, cl;
2322
2323 if (res != FR_OK) { /* No file, create new */
2324 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
2325 #if _FS_LOCK
2326 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
2327 #else
2328 res = dir_register(&dj);
2329 #endif
2330 mode |= FA_CREATE_ALWAYS; /* File is created */
2331 dir = dj.dir; /* New entry */
2332 }
2333 else { /* Any object is already existing */
2334 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */
2335 res = FR_DENIED;
2336 } else {
2337 if (mode & FA_CREATE_NEW) /* Cannot create as new file */
2338 res = FR_EXIST;
2339 }
2340 }
2341 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */
2342 dw = get_fattime(); /* Created time */
2343 ST_DWORD(dir+DIR_CrtTime, dw);
2344 dir[DIR_Attr] = 0; /* Reset attribute */
2345 ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */
2346 cl = ld_clust(dj.fs, dir); /* Get start cluster */
2347 st_clust(dir, 0); /* cluster = 0 */
2348 dj.fs->wflag = 1;
2349 if (cl) { /* Remove the cluster chain if exist */
2350 dw = dj.fs->winsect;
2351 res = remove_chain(dj.fs, cl);
2352 if (res == FR_OK) {
2353 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
2354 res = move_window(dj.fs, dw);
2355 }
2356 }
2357 }
2358 }
2359 else { /* Open an existing file */
2360 if (res == FR_OK) { /* Follow succeeded */
2361 if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */
2362 res = FR_NO_FILE;
2363 } else {
2364 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
2365 res = FR_DENIED;
2366 }
2367 }
2368 }
2369 if (res == FR_OK) {
2370 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */
2371 mode |= FA__WRITTEN;
2372 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
2373 fp->dir_ptr = dir;
2374 #if _FS_LOCK
2375 fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2376 if (!fp->lockid) res = FR_INT_ERR;
2377 #endif
2378 }
2379
2380 #else /* R/O configuration */
2381 if (res == FR_OK) { /* Follow succeeded */
2382 dir = dj.dir;
2383 if (!dir) { /* Current dir itself */
2384 res = FR_INVALID_NAME;
2385 } else {
2386 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */
2387 res = FR_NO_FILE;
2388 }
2389 }
2390 #endif
2391 FREE_BUF();
2392
2393 if (res == FR_OK) {
2394 fp->flag = mode; /* File access mode */
2395 fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */
2396 fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
2397 fp->fptr = 0; /* File pointer */
2398 fp->dsect = 0;
2399 #if _USE_FASTSEEK
2400 fp->cltbl = 0; /* Normal seek mode */
2401 #endif
2402 fp->fs = dj.fs; fp->id = dj.fs->id; /* Validate file object */
2403 }
2404 }
2405
2406 LEAVE_FF(dj.fs, res);
2407 }
2408
2409
2410
2411
2412 /*-----------------------------------------------------------------------*/
2413 /* Read File */
2414 /*-----------------------------------------------------------------------*/
2415
2416 FRESULT f_read (
2417 FIL *fp, /* Pointer to the file object */
2418 void *buff, /* Pointer to data buffer */
2419 UINT btr, /* Number of bytes to read */
2420 UINT *br /* Pointer to number of bytes read */
2421 )
2422 {
2423 FRESULT res;
2424 DWORD clst, sect, remain;
2425 UINT rcnt, cc;
2426 BYTE csect, *rbuff = buff;
2427
2428
2429 *br = 0; /* Clear read byte counter */
2430
2431 res = validate(fp); /* Check validity */
2432 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2433 if (fp->flag & FA__ERROR) /* Aborted file? */
2434 LEAVE_FF(fp->fs, FR_INT_ERR);
2435 if (!(fp->flag & FA_READ)) /* Check access mode */
2436 LEAVE_FF(fp->fs, FR_DENIED);
2437 remain = fp->fsize - fp->fptr;
2438 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
2439
2440 for ( ; btr; /* Repeat until all data read */
2441 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
2442 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2443 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
2444 if (!csect) { /* On the cluster boundary? */
2445 if (fp->fptr == 0) { /* On the top of the file? */
2446 clst = fp->sclust; /* Follow from the origin */
2447 } else { /* Middle or end of the file */
2448 #if _USE_FASTSEEK
2449 if (fp->cltbl)
2450 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
2451 else
2452 #endif
2453 clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */
2454 }
2455 if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
2456 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2457 fp->clust = clst; /* Update current cluster */
2458 }
2459 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
2460 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2461 sect += csect;
2462 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
2463 if (cc) { /* Read maximum contiguous sectors directly */
2464 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2465 cc = fp->fs->csize - csect;
2466 if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK)
2467 ABORT(fp->fs, FR_DISK_ERR);
2468 #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
2469 #if _FS_TINY
2470 if (fp->fs->wflag && fp->fs->winsect - sect < cc)
2471 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
2472 #else
2473 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
2474 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
2475 #endif
2476 #endif
2477 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
2478 continue;
2479 }
2480 #if !_FS_TINY
2481 if (fp->dsect != sect) { /* Load data sector if not in cache */
2482 #if !_FS_READONLY
2483 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
2484 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2485 ABORT(fp->fs, FR_DISK_ERR);
2486 fp->flag &= ~FA__DIRTY;
2487 }
2488 #endif
2489 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */
2490 ABORT(fp->fs, FR_DISK_ERR);
2491 }
2492 #endif
2493 fp->dsect = sect;
2494 }
2495 rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
2496 if (rcnt > btr) rcnt = btr;
2497 #if _FS_TINY
2498 if (move_window(fp->fs, fp->dsect)) /* Move sector window */
2499 ABORT(fp->fs, FR_DISK_ERR);
2500 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
2501 #else
2502 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
2503 #endif
2504 }
2505
2506 LEAVE_FF(fp->fs, FR_OK);
2507 }
2508
2509
2510
2511
2512 #if !_FS_READONLY
2513 /*-----------------------------------------------------------------------*/
2514 /* Write File */
2515 /*-----------------------------------------------------------------------*/
2516
2517 FRESULT f_write (
2518 FIL *fp, /* Pointer to the file object */
2519 const void *buff, /* Pointer to the data to be written */
2520 UINT btw, /* Number of bytes to write */
2521 UINT *bw /* Pointer to number of bytes written */
2522 )
2523 {
2524 FRESULT res;
2525 DWORD clst, sect;
2526 UINT wcnt, cc;
2527 const BYTE *wbuff = buff;
2528 BYTE csect;
2529
2530
2531 *bw = 0; /* Clear write byte counter */
2532
2533 res = validate(fp); /* Check validity */
2534 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2535 if (fp->flag & FA__ERROR) /* Aborted file? */
2536 LEAVE_FF(fp->fs, FR_INT_ERR);
2537 if (!(fp->flag & FA_WRITE)) /* Check access mode */
2538 LEAVE_FF(fp->fs, FR_DENIED);
2539 if ((DWORD)(fp->fsize + btw) < fp->fsize) btw = 0; /* File size cannot reach 4GB */
2540
2541 for ( ; btw; /* Repeat until all data written */
2542 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
2543 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2544 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
2545 if (!csect) { /* On the cluster boundary? */
2546 if (fp->fptr == 0) { /* On the top of the file? */
2547 clst = fp->sclust; /* Follow from the origin */
2548 if (clst == 0) /* When no cluster is allocated, */
2549 fp->sclust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
2550 } else { /* Middle or end of the file */
2551 #if _USE_FASTSEEK
2552 if (fp->cltbl)
2553 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
2554 else
2555 #endif
2556 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */
2557 }
2558 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
2559 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
2560 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2561 fp->clust = clst; /* Update current cluster */
2562 }
2563 #if _FS_TINY
2564 if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write-back sector cache */
2565 ABORT(fp->fs, FR_DISK_ERR);
2566 #else
2567 if (fp->flag & FA__DIRTY) { /* Write-back sector cache */
2568 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2569 ABORT(fp->fs, FR_DISK_ERR);
2570 fp->flag &= ~FA__DIRTY;
2571 }
2572 #endif
2573 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
2574 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2575 sect += csect;
2576 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
2577 if (cc) { /* Write maximum contiguous sectors directly */
2578 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2579 cc = fp->fs->csize - csect;
2580 if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK)
2581 ABORT(fp->fs, FR_DISK_ERR);
2582 #if _FS_TINY
2583 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2584 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
2585 fp->fs->wflag = 0;
2586 }
2587 #else
2588 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2589 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
2590 fp->flag &= ~FA__DIRTY;
2591 }
2592 #endif
2593 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
2594 continue;
2595 }
2596 #if _FS_TINY
2597 if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */
2598 if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR);
2599 fp->fs->winsect = sect;
2600 }
2601 #else
2602 if (fp->dsect != sect) { /* Fill sector cache with file data */
2603 if (fp->fptr < fp->fsize &&
2604 disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
2605 ABORT(fp->fs, FR_DISK_ERR);
2606 }
2607 #endif
2608 fp->dsect = sect;
2609 }
2610 wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
2611 if (wcnt > btw) wcnt = btw;
2612 #if _FS_TINY
2613 if (move_window(fp->fs, fp->dsect)) /* Move sector window */
2614 ABORT(fp->fs, FR_DISK_ERR);
2615 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
2616 fp->fs->wflag = 1;
2617 #else
2618 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
2619 fp->flag |= FA__DIRTY;
2620 #endif
2621 }
2622
2623 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
2624 fp->flag |= FA__WRITTEN; /* Set file change flag */
2625
2626 LEAVE_FF(fp->fs, FR_OK);
2627 }
2628
2629
2630
2631
2632 /*-----------------------------------------------------------------------*/
2633 /* Synchronize the File Object */
2634 /*-----------------------------------------------------------------------*/
2635
2636 FRESULT f_sync (
2637 FIL *fp /* Pointer to the file object */
2638 )
2639 {
2640 FRESULT res;
2641 DWORD tim;
2642 BYTE *dir;
2643
2644
2645 res = validate(fp); /* Check validity of the object */
2646 if (res == FR_OK) {
2647 if (fp->flag & FA__WRITTEN) { /* Has the file been written? */
2648 #if !_FS_TINY /* Write-back dirty buffer */
2649 if (fp->flag & FA__DIRTY) {
2650 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2651 LEAVE_FF(fp->fs, FR_DISK_ERR);
2652 fp->flag &= ~FA__DIRTY;
2653 }
2654 #endif
2655 /* Update the directory entry */
2656 res = move_window(fp->fs, fp->dir_sect);
2657 if (res == FR_OK) {
2658 dir = fp->dir_ptr;
2659 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
2660 ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */
2661 st_clust(dir, fp->sclust); /* Update start cluster */
2662 tim = get_fattime(); /* Update updated time */
2663 ST_DWORD(dir+DIR_WrtTime, tim);
2664 ST_WORD(dir+DIR_LstAccDate, 0);
2665 fp->flag &= ~FA__WRITTEN;
2666 fp->fs->wflag = 1;
2667 res = sync(fp->fs);
2668 }
2669 }
2670 }
2671
2672 LEAVE_FF(fp->fs, res);
2673 }
2674
2675 #endif /* !_FS_READONLY */
2676
2677
2678
2679
2680 /*-----------------------------------------------------------------------*/
2681 /* Close File */
2682 /*-----------------------------------------------------------------------*/
2683
2684 FRESULT f_close (
2685 FIL *fp /* Pointer to the file object to be closed */
2686 )
2687 {
2688 FRESULT res;
2689
2690
2691 #if _FS_READONLY
2692 res = validate(fp);
2693 {
2694 #if _FS_REENTRANT
2695 FATFS *fs = fp->fs;
2696 #endif
2697 if (res == FR_OK) fp->fs = 0; /* Discard file object */
2698 LEAVE_FF(fs, res);
2699 }
2700 #else
2701 res = f_sync(fp); /* Flush cached data */
2702 #if _FS_LOCK
2703 if (res == FR_OK) { /* Decrement open counter */
2704 #if _FS_REENTRANT
2705 FATFS *fs = fp->fs;;
2706 res = validate(fp);
2707 if (res == FR_OK) {
2708 res = dec_lock(fp->lockid);
2709 unlock_fs(fs, FR_OK);
2710 }
2711 #else
2712 res = dec_lock(fp->lockid);
2713 #endif
2714 }
2715 #endif
2716 if (res == FR_OK) fp->fs = 0; /* Discard file object */
2717 return res;
2718 #endif
2719 }
2720
2721
2722
2723
2724 /*-----------------------------------------------------------------------*/
2725 /* Current Drive/Directory Handlings */
2726 /*-----------------------------------------------------------------------*/
2727
2728 #if _FS_RPATH >= 1
2729
2730 FRESULT f_chdrive (
2731 BYTE drv /* Drive number */
2732 )
2733 {
2734 if (drv >= _VOLUMES) return FR_INVALID_DRIVE;
2735
2736 CurrVol = drv;
2737
2738 return FR_OK;
2739 }
2740
2741
2742
2743 FRESULT f_chdir (
2744 const TCHAR *path /* Pointer to the directory path */
2745 )
2746 {
2747 FRESULT res;
2748 DIR dj;
2749 DEF_NAMEBUF;
2750
2751
2752 res = chk_mounted(&path, &dj.fs, 0);
2753 if (res == FR_OK) {
2754 INIT_BUF(dj);
2755 res = follow_path(&dj, path); /* Follow the path */
2756 FREE_BUF();
2757 if (res == FR_OK) { /* Follow completed */
2758 if (!dj.dir) {
2759 dj.fs->cdir = dj.sclust; /* Start directory itself */
2760 } else {
2761 if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */
2762 dj.fs->cdir = ld_clust(dj.fs, dj.dir);
2763 else
2764 res = FR_NO_PATH; /* Reached but a file */
2765 }
2766 }
2767 if (res == FR_NO_FILE) res = FR_NO_PATH;
2768 }
2769
2770 LEAVE_FF(dj.fs, res);
2771 }
2772
2773
2774 #if _FS_RPATH >= 2
2775 FRESULT f_getcwd (
2776 TCHAR *path, /* Pointer to the directory path */
2777 UINT sz_path /* Size of path */
2778 )
2779 {
2780 FRESULT res;
2781 DIR dj;
2782 UINT i, n;
2783 DWORD ccl;
2784 TCHAR *tp;
2785 FILINFO fno;
2786 DEF_NAMEBUF;
2787
2788
2789 *path = 0;
2790 res = chk_mounted((const TCHAR**)&path, &dj.fs, 0); /* Get current volume */
2791 if (res == FR_OK) {
2792 INIT_BUF(dj);
2793 i = sz_path; /* Bottom of buffer (dir stack base) */
2794 dj.sclust = dj.fs->cdir; /* Start to follow upper dir from current dir */
2795 while ((ccl = dj.sclust) != 0) { /* Repeat while current dir is a sub-dir */
2796 res = dir_sdi(&dj, 1); /* Get parent dir */
2797 if (res != FR_OK) break;
2798 res = dir_read(&dj);
2799 if (res != FR_OK) break;
2800 dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent dir */
2801 res = dir_sdi(&dj, 0);
2802 if (res != FR_OK) break;
2803 do { /* Find the entry links to the child dir */
2804 res = dir_read(&dj);
2805 if (res != FR_OK) break;
2806 if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */
2807 res = dir_next(&dj, 0);
2808 } while (res == FR_OK);
2809 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
2810 if (res != FR_OK) break;
2811 #if _USE_LFN
2812 fno.lfname = path;
2813 fno.lfsize = i;
2814 #endif
2815 get_fileinfo(&dj, &fno); /* Get the dir name and push it to the buffer */
2816 tp = fno.fname;
2817 if (_USE_LFN && *path) tp = path;
2818 for (n = 0; tp[n]; n++) ;
2819 if (i < n + 3) {
2820 res = FR_NOT_ENOUGH_CORE; break;
2821 }
2822 while (n) path[--i] = tp[--n];
2823 path[--i] = '/';
2824 }
2825 tp = path;
2826 if (res == FR_OK) {
2827 *tp++ = '0' + CurrVol; /* Put drive number */
2828 *tp++ = ':';
2829 if (i == sz_path) { /* Root-dir */
2830 *tp++ = '/';
2831 } else { /* Sub-dir */
2832 do /* Add stacked path str */
2833 *tp++ = path[i++];
2834 while (i < sz_path);
2835 }
2836 }
2837 *tp = 0;
2838 FREE_BUF();
2839 }
2840
2841 LEAVE_FF(dj.fs, res);
2842 }
2843 #endif /* _FS_RPATH >= 2 */
2844 #endif /* _FS_RPATH >= 1 */
2845
2846
2847
2848 #if _FS_MINIMIZE <= 2
2849 /*-----------------------------------------------------------------------*/
2850 /* Seek File R/W Pointer */
2851 /*-----------------------------------------------------------------------*/
2852
2853 FRESULT f_lseek (
2854 FIL *fp, /* Pointer to the file object */
2855 DWORD ofs /* File pointer from top of file */
2856 )
2857 {
2858 FRESULT res;
2859
2860
2861 res = validate(fp); /* Check validity of the object */
2862 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2863 if (fp->flag & FA__ERROR) /* Check abort flag */
2864 LEAVE_FF(fp->fs, FR_INT_ERR);
2865
2866 #if _USE_FASTSEEK
2867 if (fp->cltbl) { /* Fast seek */
2868 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
2869
2870 if (ofs == CREATE_LINKMAP) { /* Create CLMT */
2871 tbl = fp->cltbl;
2872 tlen = *tbl++; ulen = 2; /* Given table size and required table size */
2873 cl = fp->sclust; /* Top of the chain */
2874 if (cl) {
2875 do {
2876 /* Get a fragment */
2877 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
2878 do {
2879 pcl = cl; ncl++;
2880 cl = get_fat(fp->fs, cl);
2881 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
2882 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2883 } while (cl == pcl + 1);
2884 if (ulen <= tlen) { /* Store the length and top of the fragment */
2885 *tbl++ = ncl; *tbl++ = tcl;
2886 }
2887 } while (cl < fp->fs->n_fatent); /* Repeat until end of chain */
2888 }
2889 *fp->cltbl = ulen; /* Number of items used */
2890 if (ulen <= tlen)
2891 *tbl = 0; /* Terminate table */
2892 else
2893 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
2894
2895 } else { /* Fast seek */
2896 if (ofs > fp->fsize) /* Clip offset at the file size */
2897 ofs = fp->fsize;
2898 fp->fptr = ofs; /* Set file pointer */
2899 if (ofs) {
2900 fp->clust = clmt_clust(fp, ofs - 1);
2901 dsc = clust2sect(fp->fs, fp->clust);
2902 if (!dsc) ABORT(fp->fs, FR_INT_ERR);
2903 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
2904 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */
2905 #if !_FS_TINY
2906 #if !_FS_READONLY
2907 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
2908 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2909 ABORT(fp->fs, FR_DISK_ERR);
2910 fp->flag &= ~FA__DIRTY;
2911 }
2912 #endif
2913 if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */
2914 ABORT(fp->fs, FR_DISK_ERR);
2915 #endif
2916 fp->dsect = dsc;
2917 }
2918 }
2919 }
2920 } else
2921 #endif
2922
2923 /* Normal Seek */
2924 {
2925 DWORD clst, bcs, nsect, ifptr;
2926
2927 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
2928 #if !_FS_READONLY
2929 && !(fp->flag & FA_WRITE)
2930 #endif
2931 ) ofs = fp->fsize;
2932
2933 ifptr = fp->fptr;
2934 fp->fptr = nsect = 0;
2935 if (ofs) {
2936 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
2937 if (ifptr > 0 &&
2938 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
2939 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
2940 ofs -= fp->fptr;
2941 clst = fp->clust;
2942 } else { /* When seek to back cluster, */
2943 clst = fp->sclust; /* start from the first cluster */
2944 #if !_FS_READONLY
2945 if (clst == 0) { /* If no cluster chain, create a new chain */
2946 clst = create_chain(fp->fs, 0);
2947 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
2948 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2949 fp->sclust = clst;
2950 }
2951 #endif
2952 fp->clust = clst;
2953 }
2954 if (clst != 0) {
2955 while (ofs > bcs) { /* Cluster following loop */
2956 #if !_FS_READONLY
2957 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
2958 clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */
2959 if (clst == 0) { /* When disk gets full, clip file size */
2960 ofs = bcs; break;
2961 }
2962 } else
2963 #endif
2964 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
2965 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2966 if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
2967 fp->clust = clst;
2968 fp->fptr += bcs;
2969 ofs -= bcs;
2970 }
2971 fp->fptr += ofs;
2972 if (ofs % SS(fp->fs)) {
2973 nsect = clust2sect(fp->fs, clst); /* Current sector */
2974 if (!nsect) ABORT(fp->fs, FR_INT_ERR);
2975 nsect += ofs / SS(fp->fs);
2976 }
2977 }
2978 }
2979 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */
2980 #if !_FS_TINY
2981 #if !_FS_READONLY
2982 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
2983 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2984 ABORT(fp->fs, FR_DISK_ERR);
2985 fp->flag &= ~FA__DIRTY;
2986 }
2987 #endif
2988 if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */
2989 ABORT(fp->fs, FR_DISK_ERR);
2990 #endif
2991 fp->dsect = nsect;
2992 }
2993 #if !_FS_READONLY
2994 if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */
2995 fp->fsize = fp->fptr;
2996 fp->flag |= FA__WRITTEN;
2997 }
2998 #endif
2999 }
3000
3001 LEAVE_FF(fp->fs, res);
3002 }
3003
3004
3005
3006 #if _FS_MINIMIZE <= 1
3007 /*-----------------------------------------------------------------------*/
3008 /* Create a Directory Object */
3009 /*-----------------------------------------------------------------------*/
3010
3011 FRESULT f_opendir (
3012 DIR *dj, /* Pointer to directory object to create */
3013 const TCHAR *path /* Pointer to the directory path */
3014 )
3015 {
3016 FRESULT res;
3017 FATFS *fs;
3018 DEF_NAMEBUF;
3019
3020
3021 if (!dj) return FR_INVALID_OBJECT;
3022
3023 res = chk_mounted(&path, &dj->fs, 0);
3024 fs = dj->fs;
3025 if (res == FR_OK) {
3026 INIT_BUF(*dj);
3027 res = follow_path(dj, path); /* Follow the path to the directory */
3028 FREE_BUF();
3029 if (res == FR_OK) { /* Follow completed */
3030 if (dj->dir) { /* It is not the root dir */
3031 if (dj->dir[DIR_Attr] & AM_DIR) { /* The object is a directory */
3032 dj->sclust = ld_clust(fs, dj->dir);
3033 } else { /* The object is not a directory */
3034 res = FR_NO_PATH;
3035 }
3036 }
3037 if (res == FR_OK) {
3038 dj->id = fs->id;
3039 res = dir_sdi(dj, 0); /* Rewind dir */
3040 }
3041 }
3042 if (res == FR_NO_FILE) res = FR_NO_PATH;
3043 if (res != FR_OK) dj->fs = 0; /* Invalidate the dir object if function faild */
3044 } else {
3045 dj->fs = 0;
3046 }
3047
3048 LEAVE_FF(fs, res);
3049 }
3050
3051
3052
3053
3054 /*-----------------------------------------------------------------------*/
3055 /* Read Directory Entry in Sequence */
3056 /*-----------------------------------------------------------------------*/
3057
3058 FRESULT f_readdir (
3059 DIR *dj, /* Pointer to the open directory object */
3060 FILINFO *fno /* Pointer to file information to return */
3061 )
3062 {
3063 FRESULT res;
3064 DEF_NAMEBUF;
3065
3066
3067 res = validate(dj); /* Check validity of the object */
3068 if (res == FR_OK) {
3069 if (!fno) {
3070 res = dir_sdi(dj, 0); /* Rewind the directory object */
3071 } else {
3072 INIT_BUF(*dj);
3073 res = dir_read(dj); /* Read an directory item */
3074 if (res == FR_NO_FILE) { /* Reached end of dir */
3075 dj->sect = 0;
3076 res = FR_OK;
3077 }
3078 if (res == FR_OK) { /* A valid entry is found */
3079 get_fileinfo(dj, fno); /* Get the object information */
3080 res = dir_next(dj, 0); /* Increment index for next */
3081 if (res == FR_NO_FILE) {
3082 dj->sect = 0;
3083 res = FR_OK;
3084 }
3085 }
3086 FREE_BUF();
3087 }
3088 }
3089
3090 LEAVE_FF(dj->fs, res);
3091 }
3092
3093
3094
3095 #if _FS_MINIMIZE == 0
3096 /*-----------------------------------------------------------------------*/
3097 /* Get File Status */
3098 /*-----------------------------------------------------------------------*/
3099
3100 FRESULT f_stat (
3101 const TCHAR *path, /* Pointer to the file path */
3102 FILINFO *fno /* Pointer to file information to return */
3103 )
3104 {
3105 FRESULT res;
3106 DIR dj;
3107 DEF_NAMEBUF;
3108
3109
3110 res = chk_mounted(&path, &dj.fs, 0);
3111 if (res == FR_OK) {
3112 INIT_BUF(dj);
3113 res = follow_path(&dj, path); /* Follow the file path */
3114 if (res == FR_OK) { /* Follow completed */
3115 if (dj.dir) /* Found an object */
3116 get_fileinfo(&dj, fno);
3117 else /* It is root dir */
3118 res = FR_INVALID_NAME;
3119 }
3120 FREE_BUF();
3121 }
3122
3123 LEAVE_FF(dj.fs, res);
3124 }
3125
3126
3127
3128 #if !_FS_READONLY
3129 /*-----------------------------------------------------------------------*/
3130 /* Get Number of Free Clusters */
3131 /*-----------------------------------------------------------------------*/
3132
3133 FRESULT f_getfree (
3134 const TCHAR *path, /* Pointer to the logical drive number (root dir) */
3135 DWORD *nclst, /* Pointer to the variable to return number of free clusters */
3136 FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */
3137 )
3138 {
3139 FRESULT res;
3140 FATFS *fs;
3141 DWORD n, clst, sect, stat;
3142 UINT i;
3143 BYTE fat, *p;
3144
3145
3146 /* Get drive number */
3147 res = chk_mounted(&path, fatfs, 0);
3148 fs = *fatfs;
3149 if (res == FR_OK) {
3150 /* If free_clust is valid, return it without full cluster scan */
3151 if (fs->free_clust <= fs->n_fatent - 2) {
3152 *nclst = fs->free_clust;
3153 } else {
3154 /* Get number of free clusters */
3155 fat = fs->fs_type;
3156 n = 0;
3157 if (fat == FS_FAT12) {
3158 clst = 2;
3159 do {
3160 stat = get_fat(fs, clst);
3161 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
3162 if (stat == 1) { res = FR_INT_ERR; break; }
3163 if (stat == 0) n++;
3164 } while (++clst < fs->n_fatent);
3165 } else {
3166 clst = fs->n_fatent;
3167 sect = fs->fatbase;
3168 i = 0; p = 0;
3169 do {
3170 if (!i) {
3171 res = move_window(fs, sect++);
3172 if (res != FR_OK) break;
3173 p = fs->win;
3174 i = SS(fs);
3175 }
3176 if (fat == FS_FAT16) {
3177 if (LD_WORD(p) == 0) n++;
3178 p += 2; i -= 2;
3179 } else {
3180 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
3181 p += 4; i -= 4;
3182 }
3183 } while (--clst);
3184 }
3185 fs->free_clust = n;
3186 if (fat == FS_FAT32) fs->fsi_flag = 1;
3187 *nclst = n;
3188 }
3189 }
3190 LEAVE_FF(fs, res);
3191 }
3192
3193
3194
3195
3196 /*-----------------------------------------------------------------------*/
3197 /* Truncate File */
3198 /*-----------------------------------------------------------------------*/
3199
3200 FRESULT f_truncate (
3201 FIL *fp /* Pointer to the file object */
3202 )
3203 {
3204 FRESULT res;
3205 DWORD ncl;
3206
3207
3208 if (!fp) return FR_INVALID_OBJECT;
3209
3210 res = validate(fp); /* Check validity of the object */
3211 if (res == FR_OK) {
3212 if (fp->flag & FA__ERROR) { /* Check abort flag */
3213 res = FR_INT_ERR;
3214 } else {
3215 if (!(fp->flag & FA_WRITE)) /* Check access mode */
3216 res = FR_DENIED;
3217 }
3218 }
3219 if (res == FR_OK) {
3220 if (fp->fsize > fp->fptr) {
3221 fp->fsize = fp->fptr; /* Set file size to current R/W point */
3222 fp->flag |= FA__WRITTEN;
3223 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
3224 res = remove_chain(fp->fs, fp->sclust);
3225 fp->sclust = 0;
3226 } else { /* When truncate a part of the file, remove remaining clusters */
3227 ncl = get_fat(fp->fs, fp->clust);
3228 res = FR_OK;
3229 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
3230 if (ncl == 1) res = FR_INT_ERR;
3231 if (res == FR_OK && ncl < fp->fs->n_fatent) {
3232 res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF);
3233 if (res == FR_OK) res = remove_chain(fp->fs, ncl);
3234 }
3235 }
3236 }
3237 if (res != FR_OK) fp->flag |= FA__ERROR;
3238 }
3239
3240 LEAVE_FF(fp->fs, res);
3241 }
3242
3243
3244
3245
3246 /*-----------------------------------------------------------------------*/
3247 /* Delete a File or Directory */
3248 /*-----------------------------------------------------------------------*/
3249
3250 FRESULT f_unlink (
3251 const TCHAR *path /* Pointer to the file or directory path */
3252 )
3253 {
3254 FRESULT res;
3255 DIR dj, sdj;
3256 BYTE *dir;
3257 DWORD dclst;
3258 DEF_NAMEBUF;
3259
3260
3261 res = chk_mounted(&path, &dj.fs, 1);
3262 if (res == FR_OK) {
3263 INIT_BUF(dj);
3264 res = follow_path(&dj, path); /* Follow the file path */
3265 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
3266 res = FR_INVALID_NAME; /* Cannot remove dot entry */
3267 #if _FS_LOCK
3268 if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open file */
3269 #endif
3270 if (res == FR_OK) { /* The object is accessible */
3271 dir = dj.dir;
3272 if (!dir) {
3273 res = FR_INVALID_NAME; /* Cannot remove the start directory */
3274 } else {
3275 if (dir[DIR_Attr] & AM_RDO)
3276 res = FR_DENIED; /* Cannot remove R/O object */
3277 }
3278 dclst = ld_clust(dj.fs, dir);
3279 if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */
3280 if (dclst < 2) {
3281 res = FR_INT_ERR;
3282 } else {
3283 mem_cpy(&sdj, &dj, sizeof (DIR)); /* Check if the sub-dir is empty or not */
3284 sdj.sclust = dclst;
3285 res = dir_sdi(&sdj, 2); /* Exclude dot entries */
3286 if (res == FR_OK) {
3287 res = dir_read(&sdj);
3288 if (res == FR_OK /* Not empty dir */
3289 #if _FS_RPATH
3290 || dclst == dj.fs->cdir /* Current dir */
3291 #endif
3292 ) res = FR_DENIED;
3293 if (res == FR_NO_FILE) res = FR_OK; /* Empty */
3294 }
3295 }
3296 }
3297 if (res == FR_OK) {
3298 res = dir_remove(&dj); /* Remove the directory entry */
3299 if (res == FR_OK) {
3300 if (dclst) /* Remove the cluster chain if exist */
3301 res = remove_chain(dj.fs, dclst);
3302 if (res == FR_OK) res = sync(dj.fs);
3303 }
3304 }
3305 }
3306 FREE_BUF();
3307 }
3308 LEAVE_FF(dj.fs, res);
3309 }
3310
3311
3312
3313
3314 /*-----------------------------------------------------------------------*/
3315 /* Create a Directory */
3316 /*-----------------------------------------------------------------------*/
3317
3318 FRESULT f_mkdir (
3319 const TCHAR *path /* Pointer to the directory path */
3320 )
3321 {
3322 FRESULT res;
3323 DIR dj;
3324 BYTE *dir, n;
3325 DWORD dsc, dcl, pcl, tim = get_fattime();
3326 DEF_NAMEBUF;
3327
3328
3329 res = chk_mounted(&path, &dj.fs, 1);
3330 if (res == FR_OK) {
3331 INIT_BUF(dj);
3332 res = follow_path(&dj, path); /* Follow the file path */
3333 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */
3334 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT))
3335 res = FR_INVALID_NAME;
3336 if (res == FR_NO_FILE) { /* Can create a new directory */
3337 dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */
3338 res = FR_OK;
3339 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */
3340 if (dcl == 1) res = FR_INT_ERR;
3341 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
3342 if (res == FR_OK) /* Flush FAT */
3343 res = move_window(dj.fs, 0);
3344 if (res == FR_OK) { /* Initialize the new directory table */
3345 dsc = clust2sect(dj.fs, dcl);
3346 dir = dj.fs->win;
3347 mem_set(dir, 0, SS(dj.fs));
3348 mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */
3349 dir[DIR_Name] = '.';
3350 dir[DIR_Attr] = AM_DIR;
3351 ST_DWORD(dir+DIR_WrtTime, tim);
3352 st_clust(dir, dcl);
3353 mem_cpy(dir+SZ_DIR, dir, SZ_DIR); /* Create ".." entry */
3354 dir[33] = '.'; pcl = dj.sclust;
3355 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
3356 pcl = 0;
3357 st_clust(dir+SZ_DIR, pcl);
3358 for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */
3359 dj.fs->winsect = dsc++;
3360 dj.fs->wflag = 1;
3361 res = move_window(dj.fs, 0);
3362 if (res != FR_OK) break;
3363 mem_set(dir, 0, SS(dj.fs));
3364 }
3365 }
3366 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */
3367 if (res != FR_OK) {
3368 remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */
3369 } else {
3370 dir = dj.dir;
3371 dir[DIR_Attr] = AM_DIR; /* Attribute */
3372 ST_DWORD(dir+DIR_WrtTime, tim); /* Created time */
3373 st_clust(dir, dcl); /* Table start cluster */
3374 dj.fs->wflag = 1;
3375 res = sync(dj.fs);
3376 }
3377 }
3378 FREE_BUF();
3379 }
3380
3381 LEAVE_FF(dj.fs, res);
3382 }
3383
3384
3385
3386
3387 /*-----------------------------------------------------------------------*/
3388 /* Change Attribute */
3389 /*-----------------------------------------------------------------------*/
3390
3391 FRESULT f_chmod (
3392 const TCHAR *path, /* Pointer to the file path */
3393 BYTE value, /* Attribute bits */
3394 BYTE mask /* Attribute mask to change */
3395 )
3396 {
3397 FRESULT res;
3398 DIR dj;
3399 BYTE *dir;
3400 DEF_NAMEBUF;
3401
3402
3403 res = chk_mounted(&path, &dj.fs, 1);
3404 if (res == FR_OK) {
3405 INIT_BUF(dj);
3406 res = follow_path(&dj, path); /* Follow the file path */
3407 FREE_BUF();
3408 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
3409 res = FR_INVALID_NAME;
3410 if (res == FR_OK) {
3411 dir = dj.dir;
3412 if (!dir) { /* Is it a root directory? */
3413 res = FR_INVALID_NAME;
3414 } else { /* File or sub directory */
3415 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
3416 dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
3417 dj.fs->wflag = 1;
3418 res = sync(dj.fs);
3419 }
3420 }
3421 }
3422
3423 LEAVE_FF(dj.fs, res);
3424 }
3425
3426
3427
3428
3429 /*-----------------------------------------------------------------------*/
3430 /* Change Timestamp */
3431 /*-----------------------------------------------------------------------*/
3432
3433 FRESULT f_utime (
3434 const TCHAR *path, /* Pointer to the file/directory name */
3435 const FILINFO *fno /* Pointer to the time stamp to be set */
3436 )
3437 {
3438 FRESULT res;
3439 DIR dj;
3440 BYTE *dir;
3441 DEF_NAMEBUF;
3442
3443
3444 res = chk_mounted(&path, &dj.fs, 1);
3445 if (res == FR_OK) {
3446 INIT_BUF(dj);
3447 res = follow_path(&dj, path); /* Follow the file path */
3448 FREE_BUF();
3449 if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
3450 res = FR_INVALID_NAME;
3451 if (res == FR_OK) {
3452 dir = dj.dir;
3453 if (!dir) { /* Root directory */
3454 res = FR_INVALID_NAME;
3455 } else { /* File or sub-directory */
3456 ST_WORD(dir+DIR_WrtTime, fno->ftime);
3457 ST_WORD(dir+DIR_WrtDate, fno->fdate);
3458 dj.fs->wflag = 1;
3459 res = sync(dj.fs);
3460 }
3461 }
3462 }
3463
3464 LEAVE_FF(dj.fs, res);
3465 }
3466
3467
3468
3469
3470 /*-----------------------------------------------------------------------*/
3471 /* Rename File/Directory */
3472 /*-----------------------------------------------------------------------*/
3473
3474 FRESULT f_rename (
3475 const TCHAR *path_old, /* Pointer to the old name */
3476 const TCHAR *path_new /* Pointer to the new name */
3477 )
3478 {
3479 FRESULT res;
3480 DIR djo, djn;
3481 BYTE buf[21], *dir;
3482 DWORD dw;
3483 DEF_NAMEBUF;
3484
3485
3486 res = chk_mounted(&path_old, &djo.fs, 1);
3487 if (res == FR_OK) {
3488 djn.fs = djo.fs;
3489 INIT_BUF(djo);
3490 res = follow_path(&djo, path_old); /* Check old object */
3491 if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT))
3492 res = FR_INVALID_NAME;
3493 #if _FS_LOCK
3494 if (res == FR_OK) res = chk_lock(&djo, 2);
3495 #endif
3496 if (res == FR_OK) { /* Old object is found */
3497 if (!djo.dir) { /* Is root dir? */
3498 res = FR_NO_FILE;
3499 } else {
3500 mem_cpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except for name */
3501 mem_cpy(&djn, &djo, sizeof (DIR)); /* Check new object */
3502 res = follow_path(&djn, path_new);
3503 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
3504 if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */
3505 /* Start critical section that an interruption or error can cause cross-link */
3506 res = dir_register(&djn); /* Register the new entry */
3507 if (res == FR_OK) {
3508 dir = djn.dir; /* Copy object information except for name */
3509 mem_cpy(dir+13, buf+2, 19);
3510 dir[DIR_Attr] = buf[0] | AM_ARC;
3511 djo.fs->wflag = 1;
3512 if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) { /* Update .. entry in the directory if needed */
3513 dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
3514 if (!dw) {
3515 res = FR_INT_ERR;
3516 } else {
3517 res = move_window(djo.fs, dw);
3518 dir = djo.fs->win+SZ_DIR; /* .. entry */
3519 if (res == FR_OK && dir[1] == '.') {
3520 dw = (djo.fs->fs_type == FS_FAT32 && djn.sclust == djo.fs->dirbase) ? 0 : djn.sclust;
3521 st_clust(dir, dw);
3522 djo.fs->wflag = 1;
3523 }
3524 }
3525 }
3526 if (res == FR_OK) {
3527 res = dir_remove(&djo); /* Remove old entry */
3528 if (res == FR_OK)
3529 res = sync(djo.fs);
3530 }
3531 }
3532 /* End critical section */
3533 }
3534 }
3535 }
3536 FREE_BUF();
3537 }
3538 LEAVE_FF(djo.fs, res);
3539 }
3540
3541 #endif /* !_FS_READONLY */
3542 #endif /* _FS_MINIMIZE == 0 */
3543 #endif /* _FS_MINIMIZE <= 1 */
3544 #endif /* _FS_MINIMIZE <= 2 */
3545
3546
3547
3548 /*-----------------------------------------------------------------------*/
3549 /* Forward data to the stream directly (available on only tiny cfg) */
3550 /*-----------------------------------------------------------------------*/
3551 #if _USE_FORWARD && _FS_TINY
3552
3553 FRESULT f_forward (
3554 FIL *fp, /* Pointer to the file object */
3555 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
3556 UINT btr, /* Number of bytes to forward */
3557 UINT *bf /* Pointer to number of bytes forwarded */
3558 )
3559 {
3560 FRESULT res;
3561 DWORD remain, clst, sect;
3562 UINT rcnt;
3563 BYTE csect;
3564
3565
3566 *bf = 0; /* Clear transfer byte counter */
3567
3568 if (!fp) return FR_INVALID_OBJECT;
3569
3570 res = validate(fp); /* Check validity of the object */
3571 if (res != FR_OK) LEAVE_FF(fp->fs, res);
3572 if (fp->flag & FA__ERROR) /* Check error flag */
3573 LEAVE_FF(fp->fs, FR_INT_ERR);
3574 if (!(fp->flag & FA_READ)) /* Check access mode */
3575 LEAVE_FF(fp->fs, FR_DENIED);
3576
3577 remain = fp->fsize - fp->fptr;
3578 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
3579
3580 for ( ; btr && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */
3581 fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) {
3582 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
3583 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
3584 if (!csect) { /* On the cluster boundary? */
3585 clst = (fp->fptr == 0) ? /* On the top of the file? */
3586 fp->sclust : get_fat(fp->fs, fp->clust);
3587 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
3588 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3589 fp->clust = clst; /* Update current cluster */
3590 }
3591 }
3592 sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */
3593 if (!sect) ABORT(fp->fs, FR_INT_ERR);
3594 sect += csect;
3595 if (move_window(fp->fs, sect)) /* Move sector window */
3596 ABORT(fp->fs, FR_DISK_ERR);
3597 fp->dsect = sect;
3598 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
3599 if (rcnt > btr) rcnt = btr;
3600 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
3601 if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
3602 }
3603
3604 LEAVE_FF(fp->fs, FR_OK);
3605 }
3606 #endif /* _USE_FORWARD */
3607
3608
3609
3610 #if _USE_MKFS && !_FS_READONLY
3611 /*-----------------------------------------------------------------------*/
3612 /* Create File System on the Drive */
3613 /*-----------------------------------------------------------------------*/
3614 #define N_ROOTDIR 512 /* Number of root dir entries for FAT12/16 */
3615 #define N_FATS 1 /* Number of FAT copies (1 or 2) */
3616
3617
3618 FRESULT f_mkfs (
3619 BYTE drv, /* Logical drive number */
3620 BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */
3621 UINT au /* Allocation unit size [bytes] */
3622 )
3623 {
3624 static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0};
3625 static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
3626 BYTE fmt, md, sys, *tbl, pdrv, part;
3627 DWORD n_clst, vs, n, wsect;
3628 UINT i;
3629 DWORD b_vol, b_fat, b_dir, b_data; /* LBA */
3630 DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */
3631 FATFS *fs;
3632 DSTATUS stat;
3633
3634
3635 /* Check mounted drive and clear work area */
3636 if (drv >= _VOLUMES) return FR_INVALID_DRIVE;
3637 if (sfd > 1) return FR_INVALID_PARAMETER;
3638 if (au & (au - 1)) return FR_INVALID_PARAMETER;
3639 fs = FatFs[drv];
3640 if (!fs) return FR_NOT_ENABLED;
3641 fs->fs_type = 0;
3642 pdrv = LD2PD(drv); /* Physical drive */
3643 part = LD2PT(drv); /* Partition (0:auto detect, 1-4:get from partition table)*/
3644
3645 /* Get disk statics */
3646 stat = disk_initialize(pdrv);
3647 if (stat & STA_NOINIT) return FR_NOT_READY;
3648 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
3649 #if _MAX_SS != 512 /* Get disk sector size */
3650 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS)
3651 return FR_DISK_ERR;
3652 #endif
3653 if (_MULTI_PARTITION && part) {
3654 /* Get partition information from partition table in the MBR */
3655 if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
3656 if (LD_WORD(fs->win+BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
3657 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
3658 if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */
3659 b_vol = LD_DWORD(tbl+8); /* Volume start sector */
3660 n_vol = LD_DWORD(tbl+12); /* Volume size */
3661 } else {
3662 /* Create a partition in this function */
3663 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128)
3664 return FR_DISK_ERR;
3665 b_vol = (sfd) ? 0 : 63; /* Volume start sector */
3666 n_vol -= b_vol; /* Volume size */
3667 }
3668
3669 if (!au) { /* AU auto selection */
3670 vs = n_vol / (2000 / (SS(fs) / 512));
3671 for (i = 0; vs < vst[i]; i++) ;
3672 au = cst[i];
3673 }
3674 au /= SS(fs); /* Number of sectors per cluster */
3675 if (au == 0) au = 1;
3676 if (au > 128) au = 128;
3677
3678 /* Pre-compute number of clusters and FAT sub-type */
3679 n_clst = n_vol / au;
3680 fmt = FS_FAT12;
3681 if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
3682 if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
3683
3684 /* Determine offset and size of FAT structure */
3685 if (fmt == FS_FAT32) {
3686 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
3687 n_rsv = 32;
3688 n_dir = 0;
3689 } else {
3690 n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
3691 n_fat = (n_fat + SS(fs) - 1) / SS(fs);
3692 n_rsv = 1;
3693 n_dir = (DWORD)N_ROOTDIR * SZ_DIR / SS(fs);
3694 }
3695 b_fat = b_vol + n_rsv; /* FAT area start sector */
3696 b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */
3697 b_data = b_dir + n_dir; /* Data area start sector */
3698 if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */
3699
3700 /* Align data start sector to erase block boundary (for flash memory media) */
3701 if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1;
3702 n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */
3703 n = (n - b_data) / N_FATS;
3704 if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */
3705 n_rsv += n;
3706 b_fat += n;
3707 } else { /* FAT12/16: Expand FAT size */
3708 n_fat += n;
3709 }
3710
3711 /* Determine number of clusters and final check of validity of the FAT sub-type */
3712 n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
3713 if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16)
3714 || (fmt == FS_FAT32 && n_clst < MIN_FAT32))
3715 return FR_MKFS_ABORTED;
3716
3717 switch (fmt) { /* Determine system ID for partition table */
3718 case FS_FAT12: sys = 0x01; break;
3719 case FS_FAT16: sys = (n_vol < 0x10000) ? 0x04 : 0x06; break;
3720 default: sys = 0x0C;
3721 }
3722
3723 if (_MULTI_PARTITION && part) {
3724 /* Update system ID in the partition table */
3725 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
3726 tbl[4] = sys;
3727 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
3728 md = 0xF8;
3729 } else {
3730 if (sfd) { /* No partition table (SFD) */
3731 md = 0xF0;
3732 } else { /* Create partition table (FDISK) */
3733 mem_set(fs->win, 0, SS(fs));
3734 tbl = fs->win+MBR_Table; /* Create partition table for single partition in the drive */
3735 tbl[1] = 1; /* Partition start head */
3736 tbl[2] = 1; /* Partition start sector */
3737 tbl[3] = 0; /* Partition start cylinder */
3738 tbl[4] = sys; /* System type */
3739 tbl[5] = 254; /* Partition end head */
3740 n = (b_vol + n_vol) / 63 / 255;
3741 tbl[6] = (BYTE)((n >> 2) | 63); /* Partition end sector */
3742 tbl[7] = (BYTE)n; /* End cylinder */
3743 ST_DWORD(tbl+8, 63); /* Partition start in LBA */
3744 ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */
3745 ST_WORD(fs->win+BS_55AA, 0xAA55); /* MBR signature */
3746 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR sector */
3747 return FR_DISK_ERR;
3748 md = 0xF8;
3749 }
3750 }
3751
3752 /* Create BPB in the VBR */
3753 tbl = fs->win; /* Clear sector */
3754 mem_set(tbl, 0, SS(fs));
3755 mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
3756 i = SS(fs); /* Sector size */
3757 ST_WORD(tbl+BPB_BytsPerSec, i);
3758 tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */
3759 ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
3760 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
3761 i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of rootdir entries */
3762 ST_WORD(tbl+BPB_RootEntCnt, i);
3763 if (n_vol < 0x10000) { /* Number of total sectors */
3764 ST_WORD(tbl+BPB_TotSec16, n_vol);
3765 } else {
3766 ST_DWORD(tbl+BPB_TotSec32, n_vol);
3767 }
3768 tbl[BPB_Media] = md; /* Media descriptor */
3769 ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */
3770 ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */
3771 ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */
3772 n = get_fattime(); /* Use current time as VSN */
3773 if (fmt == FS_FAT32) {
3774 ST_DWORD(tbl+BS_VolID32, n); /* VSN */
3775 ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */
3776 ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */
3777 ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (VBR+1) */
3778 ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */
3779 tbl[BS_DrvNum32] = 0x80; /* Drive number */
3780 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
3781 mem_cpy(tbl+BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
3782 } else {
3783 ST_DWORD(tbl+BS_VolID, n); /* VSN */
3784 ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */
3785 tbl[BS_DrvNum] = 0x80; /* Drive number */
3786 tbl[BS_BootSig] = 0x29; /* Extended boot signature */
3787 mem_cpy(tbl+BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
3788 }
3789 ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */
3790 if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */
3791 return FR_DISK_ERR;
3792 if (fmt == FS_FAT32) /* Write backup VBR if needed (VBR+6) */
3793 disk_write(pdrv, tbl, b_vol + 6, 1);
3794
3795 /* Initialize FAT area */
3796 wsect = b_fat;
3797 for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */
3798 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
3799 n = md; /* Media descriptor byte */
3800 if (fmt != FS_FAT32) {
3801 n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
3802 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */
3803 } else {
3804 n |= 0xFFFFFF00;
3805 ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */
3806 ST_DWORD(tbl+4, 0xFFFFFFFF);
3807 ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */
3808 }
3809 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
3810 return FR_DISK_ERR;
3811 mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */
3812 for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */
3813 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
3814 return FR_DISK_ERR;
3815 }
3816 }
3817
3818 /* Initialize root directory */
3819 i = (fmt == FS_FAT32) ? au : n_dir;
3820 do {
3821 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
3822 return FR_DISK_ERR;
3823 } while (--i);
3824
3825 #if _USE_ERASE /* Erase data area if needed */
3826 {
3827 DWORD eb[2];
3828
3829 eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1;
3830 disk_ioctl(pdrv, CTRL_ERASE_SECTOR, eb);
3831 }
3832 #endif
3833
3834 /* Create FSInfo if needed */
3835 if (fmt == FS_FAT32) {
3836 ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
3837 ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
3838 ST_DWORD(tbl+FSI_Free_Count, n_clst - 1); /* Number of free clusters */
3839 ST_DWORD(tbl+FSI_Nxt_Free, 2); /* Last allocated cluster# */
3840 ST_WORD(tbl+BS_55AA, 0xAA55);
3841 disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR+1) */
3842 disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR+7) */
3843 }
3844
3845 return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR;
3846 }
3847
3848
3849 #if _MULTI_PARTITION == 2
3850 /*-----------------------------------------------------------------------*/
3851 /* Divide Physical Drive */
3852 /*-----------------------------------------------------------------------*/
3853
3854 FRESULT f_fdisk (
3855 BYTE pdrv, /* Physical drive number */
3856 const DWORD szt[], /* Pointer to the size table for each partitions */
3857 void* work /* Pointer to the working buffer */
3858 )
3859 {
3860 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
3861 BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
3862 DSTATUS stat;
3863 DWORD sz_disk, sz_part, s_part;
3864
3865
3866 stat = disk_initialize(pdrv);
3867 if (stat & STA_NOINIT) return FR_NOT_READY;
3868 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
3869 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
3870
3871 /* Determine CHS in the table regardless of the drive geometry */
3872 for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
3873 if (n == 256) n--;
3874 e_hd = n - 1;
3875 sz_cyl = 63 * n;
3876 tot_cyl = sz_disk / sz_cyl;
3877
3878 /* Create partition table */
3879 mem_set(buf, 0, _MAX_SS);
3880 p = buf + MBR_Table; b_cyl = 0;
3881 for (i = 0; i < 4; i++, p += SZ_PTE) {
3882 p_cyl = (szt[i] <= 100) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;
3883 if (!p_cyl) continue;
3884 s_part = (DWORD)sz_cyl * b_cyl;
3885 sz_part = (DWORD)sz_cyl * p_cyl;
3886 if (i == 0) { /* Exclude first track of cylinder 0 */
3887 s_hd = 1;
3888 s_part += 63; sz_part -= 63;
3889 } else {
3890 s_hd = 0;
3891 }
3892 e_cyl = b_cyl + p_cyl - 1;
3893 if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
3894
3895 /* Set partition table */
3896 p[1] = s_hd; /* Start head */
3897 p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */
3898 p[3] = (BYTE)b_cyl; /* Start cylinder */
3899 p[4] = 0x06; /* System type (temporary setting) */
3900 p[5] = e_hd; /* End head */
3901 p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */
3902 p[7] = (BYTE)e_cyl; /* End cylinder */
3903 ST_DWORD(p + 8, s_part); /* Start sector in LBA */
3904 ST_DWORD(p + 12, sz_part); /* Partition size */
3905
3906 /* Next partition */
3907 b_cyl += p_cyl;
3908 }
3909 ST_WORD(p, 0xAA55);
3910
3911 /* Write it to the MBR */
3912 return (disk_write(pdrv, buf, 0, 1) || disk_ioctl(pdrv, CTRL_SYNC, 0)) ? FR_DISK_ERR : FR_OK;
3913 }
3914
3915
3916 #endif /* _MULTI_PARTITION == 2 */
3917 #endif /* _USE_MKFS && !_FS_READONLY */
3918
3919
3920
3921
3922 #if _USE_STRFUNC
3923 /*-----------------------------------------------------------------------*/
3924 /* Get a string from the file */
3925 /*-----------------------------------------------------------------------*/
3926 TCHAR* f_gets (
3927 TCHAR* buff, /* Pointer to the string buffer to read */
3928 int len, /* Size of string buffer (characters) */
3929 FIL* fil /* Pointer to the file object */
3930 )
3931 {
3932 int n = 0;
3933 TCHAR c, *p = buff;
3934 BYTE s[2];
3935 UINT rc;
3936
3937
3938 while (n < len - 1) { /* Read bytes until buffer gets filled */
3939 f_read(fil, s, 1, &rc);
3940 if (rc != 1) break; /* Break on EOF or error */
3941 c = s[0];
3942 #if _LFN_UNICODE /* Read a character in UTF-8 encoding */
3943 if (c >= 0x80) {
3944 if (c < 0xC0) continue; /* Skip stray trailer */
3945 if (c < 0xE0) { /* Two-byte sequence */
3946 f_read(fil, s, 1, &rc);
3947 if (rc != 1) break;
3948 c = ((c & 0x1F) << 6) | (s[0] & 0x3F);
3949 if (c < 0x80) c = '?';
3950 } else {
3951 if (c < 0xF0) { /* Three-byte sequence */
3952 f_read(fil, s, 2, &rc);
3953 if (rc != 2) break;
3954 c = (c << 12) | ((s[0] & 0x3F) << 6) | (s[1] & 0x3F);
3955 if (c < 0x800) c = '?';
3956 } else { /* Reject four-byte sequence */
3957 c = '?';
3958 }
3959 }
3960 }
3961 #endif
3962 #if _USE_STRFUNC >= 2
3963 if (c == '\r') continue; /* Strip '\r' */
3964 #endif
3965 *p++ = c;
3966 n++;
3967 if (c == '\n') break; /* Break on EOL */
3968 }
3969 *p = 0;
3970 return n ? buff : 0; /* When no data read (eof or error), return with error. */
3971 }
3972
3973
3974
3975 #if !_FS_READONLY
3976 #include <stdarg.h>
3977 /*-----------------------------------------------------------------------*/
3978 /* Put a character to the file */
3979 /*-----------------------------------------------------------------------*/
3980 int f_putc (
3981 TCHAR c, /* A character to be output */
3982 FIL* fil /* Pointer to the file object */
3983 )
3984 {
3985 UINT bw, btw;
3986 BYTE s[3];
3987
3988
3989 #if _USE_STRFUNC >= 2
3990 if (c == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */
3991 #endif
3992
3993 #if _LFN_UNICODE /* Write the character in UTF-8 encoding */
3994 if (c < 0x80) { /* 7-bit */
3995 s[0] = (BYTE)c;
3996 btw = 1;
3997 } else {
3998 if (c < 0x800) { /* 11-bit */
3999 s[0] = (BYTE)(0xC0 | (c >> 6));
4000 s[1] = (BYTE)(0x80 | (c & 0x3F));
4001 btw = 2;
4002 } else { /* 16-bit */
4003 s[0] = (BYTE)(0xE0 | (c >> 12));
4004 s[1] = (BYTE)(0x80 | ((c >> 6) & 0x3F));
4005 s[2] = (BYTE)(0x80 | (c & 0x3F));
4006 btw = 3;
4007 }
4008 }
4009 #else /* Write the character without conversion */
4010 s[0] = (BYTE)c;
4011 btw = 1;
4012 #endif
4013 f_write(fil, s, btw, &bw); /* Write the char to the file */
4014 return (bw == btw) ? 1 : EOF; /* Return the result */
4015 }
4016
4017
4018
4019
4020 /*-----------------------------------------------------------------------*/
4021 /* Put a string to the file */
4022 /*-----------------------------------------------------------------------*/
4023 int f_puts (
4024 const TCHAR* str, /* Pointer to the string to be output */
4025 FIL* fil /* Pointer to the file object */
4026 )
4027 {
4028 int n;
4029
4030
4031 for (n = 0; *str; str++, n++) {
4032 if (f_putc(*str, fil) == EOF) return EOF;
4033 }
4034 return n;
4035 }
4036
4037
4038
4039
4040 /*-----------------------------------------------------------------------*/
4041 /* Put a formatted string to the file */
4042 /*-----------------------------------------------------------------------*/
4043 int f_printf (
4044 FIL* fil, /* Pointer to the file object */
4045 const TCHAR* str, /* Pointer to the format string */
4046 ... /* Optional arguments... */
4047 )
4048 {
4049 va_list arp;
4050 BYTE f, r;
4051 UINT i, j, w;
4052 ULONG v;
4053 TCHAR c, d, s[16], *p;
4054 int res, chc, cc;
4055
4056
4057 va_start(arp, str);
4058
4059 for (cc = res = 0; cc != EOF; res += cc) {
4060 c = *str++;
4061 if (c == 0) break; /* End of string */
4062 if (c != '%') { /* Non escape character */
4063 cc = f_putc(c, fil);
4064 if (cc != EOF) cc = 1;
4065 continue;
4066 }
4067 w = f = 0;
4068 c = *str++;
4069 if (c == '0') { /* Flag: '0' padding */
4070 f = 1; c = *str++;
4071 } else {
4072 if (c == '-') { /* Flag: left justified */
4073 f = 2; c = *str++;
4074 }
4075 }
4076 while (IsDigit(c)) { /* Precision */
4077 w = w * 10 + c - '0';
4078 c = *str++;
4079 }
4080 if (c == 'l' || c == 'L') { /* Prefix: Size is long int */
4081 f |= 4; c = *str++;
4082 }
4083 if (!c) break;
4084 d = c;
4085 if (IsLower(d)) d -= 0x20;
4086 switch (d) { /* Type is... */
4087 case 'S' : /* String */
4088 p = va_arg(arp, TCHAR*);
4089 for (j = 0; p[j]; j++) ;
4090 chc = 0;
4091 if (!(f & 2)) {
4092 while (j++ < w) chc += (cc = f_putc(' ', fil));
4093 }
4094 chc += (cc = f_puts(p, fil));
4095 while (j++ < w) chc += (cc = f_putc(' ', fil));
4096 if (cc != EOF) cc = chc;
4097 continue;
4098 case 'C' : /* Character */
4099 cc = f_putc((TCHAR)va_arg(arp, int), fil); continue;
4100 case 'B' : /* Binary */
4101 r = 2; break;
4102 case 'O' : /* Octal */
4103 r = 8; break;
4104 case 'D' : /* Signed decimal */
4105 case 'U' : /* Unsigned decimal */
4106 r = 10; break;
4107 case 'X' : /* Hexdecimal */
4108 r = 16; break;
4109 default: /* Unknown type (pass-through) */
4110 cc = f_putc(c, fil); continue;
4111 }
4112
4113 /* Get an argument and put it in numeral */
4114 v = (f & 4) ? (ULONG)va_arg(arp, long) : ((d == 'D') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int));
4115 if (d == 'D' && (v & 0x80000000)) {
4116 v = 0 - v;
4117 f |= 8;
4118 }
4119 i = 0;
4120 do {
4121 d = (TCHAR)(v % r); v /= r;
4122 if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
4123 s[i++] = d + '0';
4124 } while (v && i < sizeof s / sizeof s[0]);
4125 if (f & 8) s[i++] = '-';
4126 j = i; d = (f & 1) ? '0' : ' ';
4127 res = 0;
4128 while (!(f & 2) && j++ < w) res += (cc = f_putc(d, fil));
4129 do res += (cc = f_putc(s[--i], fil)); while(i);
4130 while (j++ < w) res += (cc = f_putc(' ', fil));
4131 if (cc != EOF) cc = res;
4132 }
4133
4134 va_end(arp);
4135 return (cc == EOF) ? cc : res;
4136 }
4137
4138 #endif /* !_FS_READONLY */
4139 #endif /* _USE_STRFUNC */