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[reactos.git] / reactos / tools / fatten / fatfs / ff.c
1 /*----------------------------------------------------------------------------/
2 / FatFs - FAT file system module R0.11a (C)ChaN, 2015 /
3 /-----------------------------------------------------------------------------/
4 / FatFs module is a free software that opened under license policy of
5 / following conditions.
6 /
7 / Copyright (C) 2015, ChaN, all right reserved.
8 /
9 / 1. Redistributions of source code must retain the above copyright notice,
10 / this condition and the following disclaimer.
11 /
12 / This software is provided by the copyright holder and contributors "AS IS"
13 / and any warranties related to this software are DISCLAIMED.
14 / The copyright owner or contributors be NOT LIABLE for any damages caused
15 / by use of this software.
16 /----------------------------------------------------------------------------*/
17
18
19 #include "ff.h" /* Declarations of FatFs API */
20 #include "diskio.h" /* Declarations of disk I/O functions */
21
22
23 /*--------------------------------------------------------------------------
24
25 Module Private Definitions
26
27 ---------------------------------------------------------------------------*/
28
29 #if _FATFS != 64180 /* Revision ID */
30 #error Wrong include file (ff.h).
31 #endif
32
33
34 /* Reentrancy related */
35 #if _FS_REENTRANT
36 #if _USE_LFN == 1
37 #error Static LFN work area cannot be used at thread-safe configuration
38 #endif
39 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
40 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
41 #else
42 #define ENTER_FF(fs)
43 #define LEAVE_FF(fs, res) return res
44 #endif
45
46 #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
47
48
49 /* Definitions of sector size */
50 #if (_MAX_SS < _MIN_SS) || (_MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096) || (_MIN_SS != 512 && _MIN_SS != 1024 && _MIN_SS != 2048 && _MIN_SS != 4096)
51 #error Wrong sector size configuration
52 #endif
53 #if _MAX_SS == _MIN_SS
54 #define SS(fs) ((UINT)_MAX_SS) /* Fixed sector size */
55 #else
56 #define SS(fs) ((fs)->ssize) /* Variable sector size */
57 #endif
58
59
60 /* Timestamp feature */
61 #if _FS_NORTC == 1
62 #if _NORTC_YEAR < 1980 || _NORTC_YEAR > 2107 || _NORTC_MON < 1 || _NORTC_MON > 12 || _NORTC_MDAY < 1 || _NORTC_MDAY > 31
63 #error Invalid _FS_NORTC settings
64 #endif
65 #define GET_FATTIME() ((DWORD)(_NORTC_YEAR - 1980) << 25 | (DWORD)_NORTC_MON << 21 | (DWORD)_NORTC_MDAY << 16)
66 #else
67 #define GET_FATTIME() get_fattime()
68 #endif
69
70
71 /* File access control feature */
72 #if _FS_LOCK
73 #if _FS_READONLY
74 #error _FS_LOCK must be 0 at read-only configuration
75 #endif
76 typedef struct {
77 FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */
78 DWORD clu; /* Object ID 2, directory (0:root) */
79 WORD idx; /* Object ID 3, directory index */
80 WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
81 } FILESEM;
82 #endif
83
84
85
86 /* DBCS code ranges and SBCS upper conversion tables */
87
88 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */
89 #define _DF1S 0x81 /* DBC 1st byte range 1 start */
90 #define _DF1E 0x9F /* DBC 1st byte range 1 end */
91 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */
92 #define _DF2E 0xFC /* DBC 1st byte range 2 end */
93 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */
94 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */
95 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */
96 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */
97
98 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
99 #define _DF1S 0x81
100 #define _DF1E 0xFE
101 #define _DS1S 0x40
102 #define _DS1E 0x7E
103 #define _DS2S 0x80
104 #define _DS2E 0xFE
105
106 #elif _CODE_PAGE == 949 /* Korean */
107 #define _DF1S 0x81
108 #define _DF1E 0xFE
109 #define _DS1S 0x41
110 #define _DS1E 0x5A
111 #define _DS2S 0x61
112 #define _DS2E 0x7A
113 #define _DS3S 0x81
114 #define _DS3E 0xFE
115
116 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
117 #define _DF1S 0x81
118 #define _DF1E 0xFE
119 #define _DS1S 0x40
120 #define _DS1E 0x7E
121 #define _DS2S 0xA1
122 #define _DS2E 0xFE
123
124 #elif _CODE_PAGE == 437 /* U.S. */
125 #define _DF1S 0
126 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
127 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
128 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
129 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
130 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
131 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
132 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
133 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
134
135 #elif _CODE_PAGE == 720 /* Arabic */
136 #define _DF1S 0
137 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
138 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
139 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
140 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
141 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
142 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
143 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
144 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
145
146 #elif _CODE_PAGE == 737 /* Greek */
147 #define _DF1S 0
148 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
149 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
150 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \
151 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
152 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
153 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
154 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
155 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
156
157 #elif _CODE_PAGE == 771 /* KBL */
158 #define _DF1S 0
159 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
160 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
161 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
162 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
163 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
164 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \
165 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
166 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
167
168 #elif _CODE_PAGE == 775 /* Baltic */
169 #define _DF1S 0
170 #define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \
171 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
172 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
173 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
174 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
175 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
176 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \
177 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
178
179 #elif _CODE_PAGE == 850 /* Latin 1 */
180 #define _DF1S 0
181 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
182 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
183 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
184 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
185 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
186 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
187 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
188 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
189
190 #elif _CODE_PAGE == 852 /* Latin 2 */
191 #define _DF1S 0
192 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \
193 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \
194 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \
195 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
196 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
197 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
198 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \
199 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
200
201 #elif _CODE_PAGE == 855 /* Cyrillic */
202 #define _DF1S 0
203 #define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \
204 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
205 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \
206 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
207 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
208 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
209 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \
210 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
211
212 #elif _CODE_PAGE == 857 /* Turkish */
213 #define _DF1S 0
214 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \
215 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
216 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
217 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
218 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
219 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
220 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
221 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
222
223 #elif _CODE_PAGE == 860 /* Portuguese */
224 #define _DF1S 0
225 #define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
226 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
227 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
228 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
229 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
230 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
231 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
232 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
233
234 #elif _CODE_PAGE == 861 /* Icelandic */
235 #define _DF1S 0
236 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
237 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
238 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
239 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
240 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
241 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
242 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
243 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
244
245 #elif _CODE_PAGE == 862 /* Hebrew */
246 #define _DF1S 0
247 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
248 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
249 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
250 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
251 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
252 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
253 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
254 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
255
256 #elif _CODE_PAGE == 863 /* Canadian-French */
257 #define _DF1S 0
258 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
259 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
260 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
261 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
262 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
263 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
264 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
265 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
266
267 #elif _CODE_PAGE == 864 /* Arabic */
268 #define _DF1S 0
269 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
270 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
271 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
272 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, \
274 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
275 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
276 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
277
278 #elif _CODE_PAGE == 865 /* Nordic */
279 #define _DF1S 0
280 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
281 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
282 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
283 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
284 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
285 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
286 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
287 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
288
289 #elif _CODE_PAGE == 866 /* Russian */
290 #define _DF1S 0
291 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
292 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
293 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
294 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
295 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
296 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
297 0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
298 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
299
300 #elif _CODE_PAGE == 869 /* Greek 2 */
301 #define _DF1S 0
302 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
303 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \
304 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
305 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
306 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
307 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
308 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
309 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
310
311 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
312 #if _USE_LFN
313 #error Cannot use LFN feature without valid code page.
314 #endif
315 #define _DF1S 0
316
317 #else
318 #error Unknown code page
319
320 #endif
321
322
323 /* Character code support macros */
324 #define IsUpper(c) (((c)>='A')&&((c)<='Z'))
325 #define IsLower(c) (((c)>='a')&&((c)<='z'))
326 #define IsDigit(c) (((c)>='0')&&((c)<='9'))
327
328 #if _DF1S /* Code page is DBCS */
329
330 #ifdef _DF2S /* Two 1st byte areas */
331 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
332 #else /* One 1st byte area */
333 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
334 #endif
335
336 #ifdef _DS3S /* Three 2nd byte areas */
337 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
338 #else /* Two 2nd byte areas */
339 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
340 #endif
341
342 #else /* Code page is SBCS */
343
344 #define IsDBCS1(c) 0
345 #define IsDBCS2(c) 0
346
347 #endif /* _DF1S */
348
349
350 /* Name status flags */
351 #define NSFLAG 11 /* Index of name status byte in fn[] */
352 #define NS_LOSS 0x01 /* Out of 8.3 format */
353 #define NS_LFN 0x02 /* Force to create LFN entry */
354 #define NS_LAST 0x04 /* Last segment */
355 #define NS_BODY 0x08 /* Lower case flag (body) */
356 #define NS_EXT 0x10 /* Lower case flag (ext) */
357 #define NS_DOT 0x20 /* Dot entry */
358
359
360 /* FAT sub-type boundaries (Differ from specs but correct for real DOS/Windows) */
361 #define MIN_FAT16 4086U /* Minimum number of clusters of FAT16 */
362 #define MIN_FAT32 65526U /* Minimum number of clusters of FAT32 */
363
364
365 /* FatFs refers the members in the FAT structures as byte array instead of
366 / structure members because the structure is not binary compatible between
367 / different platforms */
368
369 #define BS_jmpBoot 0 /* x86 jump instruction (3) */
370 #define BS_OEMName 3 /* OEM name (8) */
371 #define BPB_BytsPerSec 11 /* Sector size [byte] (2) */
372 #define BPB_SecPerClus 13 /* Cluster size [sector] (1) */
373 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */
374 #define BPB_NumFATs 16 /* Number of FAT copies (1) */
375 #define BPB_RootEntCnt 17 /* Number of root directory entries for FAT12/16 (2) */
376 #define BPB_TotSec16 19 /* Volume size [sector] (2) */
377 #define BPB_Media 21 /* Media descriptor (1) */
378 #define BPB_FATSz16 22 /* FAT size [sector] (2) */
379 #define BPB_SecPerTrk 24 /* Track size [sector] (2) */
380 #define BPB_NumHeads 26 /* Number of heads (2) */
381 #define BPB_HiddSec 28 /* Number of special hidden sectors (4) */
382 #define BPB_TotSec32 32 /* Volume size [sector] (4) */
383 #define BS_DrvNum 36 /* Physical drive number (1) */
384 #define BS_NTres 37 /* Error flag (1) */
385 #define BS_BootSig 38 /* Extended boot signature (1) */
386 #define BS_VolID 39 /* Volume serial number (4) */
387 #define BS_VolLab 43 /* Volume label (8) */
388 #define BS_FilSysType 54 /* File system type (1) */
389 #define BPB_FATSz32 36 /* FAT size [sector] (4) */
390 #define BPB_ExtFlags 40 /* Extended flags (2) */
391 #define BPB_FSVer 42 /* File system version (2) */
392 #define BPB_RootClus 44 /* Root directory first cluster (4) */
393 #define BPB_FSInfo 48 /* Offset of FSINFO sector (2) */
394 #define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */
395 #define BS_DrvNum32 64 /* Physical drive number (1) */
396 #define BS_NTres32 65 /* Error flag (1) */
397 #define BS_BootSig32 66 /* Extended boot signature (1) */
398 #define BS_VolID32 67 /* Volume serial number (4) */
399 #define BS_VolLab32 71 /* Volume label (8) */
400 #define BS_FilSysType32 82 /* File system type (1) */
401 #define FSI_LeadSig 0 /* FSI: Leading signature (4) */
402 #define FSI_StrucSig 484 /* FSI: Structure signature (4) */
403 #define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */
404 #define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */
405 #define MBR_Table 446 /* MBR: Partition table offset (2) */
406 #define SZ_PTE 16 /* MBR: Size of a partition table entry */
407 #define BS_55AA 510 /* Signature word (2) */
408
409 #define DIR_Name 0 /* Short file name (11) */
410 #define DIR_Attr 11 /* Attribute (1) */
411 #define DIR_NTres 12 /* Lower case flag (1) */
412 #define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */
413 #define DIR_CrtTime 14 /* Created time (2) */
414 #define DIR_CrtDate 16 /* Created date (2) */
415 #define DIR_LstAccDate 18 /* Last accessed date (2) */
416 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */
417 #define DIR_WrtTime 22 /* Modified time (2) */
418 #define DIR_WrtDate 24 /* Modified date (2) */
419 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */
420 #define DIR_FileSize 28 /* File size (4) */
421 #define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */
422 #define LDIR_Attr 11 /* LFN attribute (1) */
423 #define LDIR_Type 12 /* LFN type (1) */
424 #define LDIR_Chksum 13 /* Checksum of corresponding SFN entry */
425 #define LDIR_FstClusLO 26 /* Must be zero (0) */
426 #define SZ_DIRE 32 /* Size of a directory entry */
427 #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */
428 #define DDEM 0xE5 /* Deleted directory entry mark at DIR_Name[0] */
429 #define RDDEM 0x05 /* Replacement of the character collides with DDEM */
430
431
432
433
434 /*--------------------------------------------------------------------------
435
436 Module Private Work Area
437
438 ---------------------------------------------------------------------------*/
439
440 /* Remark: Uninitialized variables with static duration are guaranteed
441 / zero/null at start-up. If not, either the linker or start-up routine
442 / being used is not compliance with ANSI-C standard.
443 */
444
445 #if _VOLUMES < 1 || _VOLUMES > 9
446 #error Wrong _VOLUMES setting
447 #endif
448 static FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */
449 static WORD Fsid; /* File system mount ID */
450
451 #if _FS_RPATH && _VOLUMES >= 2
452 static BYTE CurrVol; /* Current drive */
453 #endif
454
455 #if _FS_LOCK
456 static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */
457 #endif
458
459 #if _USE_LFN == 0 /* Non LFN feature */
460 #define DEFINE_NAMEBUF BYTE sfn[12]
461 #define INIT_BUF(dobj) (dobj).fn = sfn
462 #define FREE_BUF()
463 #else
464 #if _MAX_LFN < 12 || _MAX_LFN > 255
465 #error Wrong _MAX_LFN setting
466 #endif
467 #if _USE_LFN == 1 /* LFN feature with static working buffer */
468 static WCHAR LfnBuf[_MAX_LFN + 1];
469 #define DEFINE_NAMEBUF BYTE sfn[12]
470 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
471 #define FREE_BUF()
472 #elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */
473 #define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN + 1]
474 #define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; }
475 #define FREE_BUF()
476 #elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */
477 #define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR *lfn
478 #define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); (dobj).lfn = lfn; (dobj).fn = sfn; }
479 #define FREE_BUF() ff_memfree(lfn)
480 #else
481 #error Wrong _USE_LFN setting
482 #endif
483 #endif
484
485 #ifdef _EXCVT
486 static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for SBCS extended characters */
487 #endif
488
489
490
491
492
493
494 /*--------------------------------------------------------------------------
495
496 Module Private Functions
497
498 ---------------------------------------------------------------------------*/
499
500
501 /*-----------------------------------------------------------------------*/
502 /* String functions */
503 /*-----------------------------------------------------------------------*/
504
505 /* Copy memory to memory */
506 static
507 void mem_cpy (void* dst, const void* src, UINT cnt) {
508 BYTE *d = (BYTE*)dst;
509 const BYTE *s = (const BYTE*)src;
510
511 #if _WORD_ACCESS == 1
512 while (cnt >= sizeof (int)) {
513 *(int*)d = *(int*)s;
514 d += sizeof (int); s += sizeof (int);
515 cnt -= sizeof (int);
516 }
517 #endif
518 while (cnt--)
519 *d++ = *s++;
520 }
521
522 /* Fill memory */
523 static
524 void mem_set (void* dst, int val, UINT cnt) {
525 BYTE *d = (BYTE*)dst;
526
527 while (cnt--)
528 *d++ = (BYTE)val;
529 }
530
531 /* Compare memory to memory */
532 static
533 int mem_cmp (const void* dst, const void* src, UINT cnt) {
534 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
535 int r = 0;
536
537 while (cnt-- && (r = *d++ - *s++) == 0) ;
538 return r;
539 }
540
541 /* Check if chr is contained in the string */
542 static
543 int chk_chr (const char* str, int chr) {
544 while (*str && *str != chr) str++;
545 return *str;
546 }
547
548
549
550
551 /*-----------------------------------------------------------------------*/
552 /* Request/Release grant to access the volume */
553 /*-----------------------------------------------------------------------*/
554 #if _FS_REENTRANT
555 static
556 int lock_fs (
557 FATFS* fs /* File system object */
558 )
559 {
560 return ff_req_grant(fs->sobj);
561 }
562
563
564 static
565 void unlock_fs (
566 FATFS* fs, /* File system object */
567 FRESULT res /* Result code to be returned */
568 )
569 {
570 if (fs &&
571 res != FR_NOT_ENABLED &&
572 res != FR_INVALID_DRIVE &&
573 res != FR_INVALID_OBJECT &&
574 res != FR_TIMEOUT) {
575 ff_rel_grant(fs->sobj);
576 }
577 }
578 #endif
579
580
581
582
583 /*-----------------------------------------------------------------------*/
584 /* File lock control functions */
585 /*-----------------------------------------------------------------------*/
586 #if _FS_LOCK
587
588 static
589 FRESULT chk_lock ( /* Check if the file can be accessed */
590 DIR* dp, /* Directory object pointing the file to be checked */
591 int acc /* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */
592 )
593 {
594 UINT i, be;
595
596 /* Search file semaphore table */
597 for (i = be = 0; i < _FS_LOCK; i++) {
598 if (Files[i].fs) { /* Existing entry */
599 if (Files[i].fs == dp->fs && /* Check if the object matched with an open object */
600 Files[i].clu == dp->sclust &&
601 Files[i].idx == dp->index) break;
602 } else { /* Blank entry */
603 be = 1;
604 }
605 }
606 if (i == _FS_LOCK) /* The object is not opened */
607 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */
608
609 /* The object has been opened. Reject any open against writing file and all write mode open */
610 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
611 }
612
613
614 static
615 int enq_lock (void) /* Check if an entry is available for a new object */
616 {
617 UINT i;
618
619 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
620 return (i == _FS_LOCK) ? 0 : 1;
621 }
622
623
624 static
625 UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */
626 DIR* dp, /* Directory object pointing the file to register or increment */
627 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
628 )
629 {
630 UINT i;
631
632
633 for (i = 0; i < _FS_LOCK; i++) { /* Find the object */
634 if (Files[i].fs == dp->fs &&
635 Files[i].clu == dp->sclust &&
636 Files[i].idx == dp->index) break;
637 }
638
639 if (i == _FS_LOCK) { /* Not opened. Register it as new. */
640 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
641 if (i == _FS_LOCK) return 0; /* No free entry to register (int err) */
642 Files[i].fs = dp->fs;
643 Files[i].clu = dp->sclust;
644 Files[i].idx = dp->index;
645 Files[i].ctr = 0;
646 }
647
648 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */
649
650 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
651
652 return i + 1;
653 }
654
655
656 static
657 FRESULT dec_lock ( /* Decrement object open counter */
658 UINT i /* Semaphore index (1..) */
659 )
660 {
661 WORD n;
662 FRESULT res;
663
664
665 if (--i < _FS_LOCK) { /* Shift index number origin from 0 */
666 n = Files[i].ctr;
667 if (n == 0x100) n = 0; /* If write mode open, delete the entry */
668 if (n) n--; /* Decrement read mode open count */
669 Files[i].ctr = n;
670 if (!n) Files[i].fs = 0; /* Delete the entry if open count gets zero */
671 res = FR_OK;
672 } else {
673 res = FR_INT_ERR; /* Invalid index nunber */
674 }
675 return res;
676 }
677
678
679 static
680 void clear_lock ( /* Clear lock entries of the volume */
681 FATFS *fs
682 )
683 {
684 UINT i;
685
686 for (i = 0; i < _FS_LOCK; i++) {
687 if (Files[i].fs == fs) Files[i].fs = 0;
688 }
689 }
690 #endif
691
692
693
694
695 /*-----------------------------------------------------------------------*/
696 /* Move/Flush disk access window in the file system object */
697 /*-----------------------------------------------------------------------*/
698 #if !_FS_READONLY
699 static
700 FRESULT sync_window ( /* FR_OK:succeeded, !=0:error */
701 FATFS* fs /* File system object */
702 )
703 {
704 DWORD wsect;
705 UINT nf;
706 FRESULT res = FR_OK;
707
708
709 if (fs->wflag) { /* Write back the sector if it is dirty */
710 wsect = fs->winsect; /* Current sector number */
711 if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) {
712 res = FR_DISK_ERR;
713 } else {
714 fs->wflag = 0;
715 if (wsect - fs->fatbase < fs->fsize) { /* Is it in the FAT area? */
716 for (nf = fs->n_fats; nf >= 2; nf--) { /* Reflect the change to all FAT copies */
717 wsect += fs->fsize;
718 disk_write(fs->drv, fs->win, wsect, 1);
719 }
720 }
721 }
722 }
723 return res;
724 }
725 #endif
726
727
728 static
729 FRESULT move_window ( /* FR_OK(0):succeeded, !=0:error */
730 FATFS* fs, /* File system object */
731 DWORD sector /* Sector number to make appearance in the fs->win[] */
732 )
733 {
734 FRESULT res = FR_OK;
735
736
737 if (sector != fs->winsect) { /* Window offset changed? */
738 #if !_FS_READONLY
739 res = sync_window(fs); /* Write-back changes */
740 #endif
741 if (res == FR_OK) { /* Fill sector window with new data */
742 if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) {
743 sector = 0xFFFFFFFF; /* Invalidate window if data is not reliable */
744 res = FR_DISK_ERR;
745 }
746 fs->winsect = sector;
747 }
748 }
749 return res;
750 }
751
752
753
754
755 /*-----------------------------------------------------------------------*/
756 /* Synchronize file system and strage device */
757 /*-----------------------------------------------------------------------*/
758 #if !_FS_READONLY
759 static
760 FRESULT sync_fs ( /* FR_OK:succeeded, !=0:error */
761 FATFS* fs /* File system object */
762 )
763 {
764 FRESULT res;
765
766
767 res = sync_window(fs);
768 if (res == FR_OK) {
769 /* Update FSInfo sector if needed */
770 if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) {
771 /* Create FSInfo structure */
772 mem_set(fs->win, 0, SS(fs));
773 ST_WORD(fs->win + BS_55AA, 0xAA55);
774 ST_DWORD(fs->win + FSI_LeadSig, 0x41615252);
775 ST_DWORD(fs->win + FSI_StrucSig, 0x61417272);
776 ST_DWORD(fs->win + FSI_Free_Count, fs->free_clust);
777 ST_DWORD(fs->win + FSI_Nxt_Free, fs->last_clust);
778 /* Write it into the FSInfo sector */
779 fs->winsect = fs->volbase + 1;
780 disk_write(fs->drv, fs->win, fs->winsect, 1);
781 fs->fsi_flag = 0;
782 }
783 /* Make sure that no pending write process in the physical drive */
784 if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
785 res = FR_DISK_ERR;
786 }
787
788 return res;
789 }
790 #endif
791
792
793
794
795 /*-----------------------------------------------------------------------*/
796 /* Get sector# from cluster# */
797 /*-----------------------------------------------------------------------*/
798 /* Hidden API for hacks and disk tools */
799
800 DWORD clust2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */
801 FATFS* fs, /* File system object */
802 DWORD clst /* Cluster# to be converted */
803 )
804 {
805 clst -= 2;
806 if (clst >= fs->n_fatent - 2) return 0; /* Invalid cluster# */
807 return clst * fs->csize + fs->database;
808 }
809
810
811
812
813 /*-----------------------------------------------------------------------*/
814 /* FAT access - Read value of a FAT entry */
815 /*-----------------------------------------------------------------------*/
816 /* Hidden API for hacks and disk tools */
817
818 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x0FFFFFFF:Cluster status */
819 FATFS* fs, /* File system object */
820 DWORD clst /* FAT index number (cluster number) to get the value */
821 )
822 {
823 UINT wc, bc;
824 BYTE *p;
825 DWORD val;
826
827
828 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
829 val = 1; /* Internal error */
830
831 } else {
832 val = 0xFFFFFFFF; /* Default value falls on disk error */
833
834 switch (fs->fs_type) {
835 case FS_FAT12 :
836 bc = (UINT)clst; bc += bc / 2;
837 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
838 wc = fs->win[bc++ % SS(fs)];
839 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
840 wc |= fs->win[bc % SS(fs)] << 8;
841 val = clst & 1 ? wc >> 4 : (wc & 0xFFF);
842 break;
843
844 case FS_FAT16 :
845 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
846 p = &fs->win[clst * 2 % SS(fs)];
847 val = LD_WORD(p);
848 break;
849
850 case FS_FAT32 :
851 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
852 p = &fs->win[clst * 4 % SS(fs)];
853 val = LD_DWORD(p) & 0x0FFFFFFF;
854 break;
855
856 default:
857 val = 1; /* Internal error */
858 }
859 }
860
861 return val;
862 }
863
864
865
866
867 /*-----------------------------------------------------------------------*/
868 /* FAT access - Change value of a FAT entry */
869 /*-----------------------------------------------------------------------*/
870 /* Hidden API for hacks and disk tools */
871
872 #if !_FS_READONLY
873 FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */
874 FATFS* fs, /* File system object */
875 DWORD clst, /* FAT index number (cluster number) to be changed */
876 DWORD val /* New value to be set to the entry */
877 )
878 {
879 UINT bc;
880 BYTE *p;
881 FRESULT res;
882
883
884 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
885 res = FR_INT_ERR;
886
887 } else {
888 switch (fs->fs_type) {
889 case FS_FAT12 :
890 bc = (UINT)clst; bc += bc / 2;
891 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
892 if (res != FR_OK) break;
893 p = &fs->win[bc++ % SS(fs)];
894 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
895 fs->wflag = 1;
896 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
897 if (res != FR_OK) break;
898 p = &fs->win[bc % SS(fs)];
899 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
900 fs->wflag = 1;
901 break;
902
903 case FS_FAT16 :
904 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
905 if (res != FR_OK) break;
906 p = &fs->win[clst * 2 % SS(fs)];
907 ST_WORD(p, (WORD)val);
908 fs->wflag = 1;
909 break;
910
911 case FS_FAT32 :
912 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
913 if (res != FR_OK) break;
914 p = &fs->win[clst * 4 % SS(fs)];
915 val |= LD_DWORD(p) & 0xF0000000;
916 ST_DWORD(p, val);
917 fs->wflag = 1;
918 break;
919
920 default :
921 res = FR_INT_ERR;
922 }
923 }
924
925 return res;
926 }
927 #endif /* !_FS_READONLY */
928
929
930
931
932 /*-----------------------------------------------------------------------*/
933 /* FAT handling - Remove a cluster chain */
934 /*-----------------------------------------------------------------------*/
935 #if !_FS_READONLY
936 static
937 FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */
938 FATFS* fs, /* File system object */
939 DWORD clst /* Cluster# to remove a chain from */
940 )
941 {
942 FRESULT res;
943 DWORD nxt;
944 #if _USE_TRIM
945 DWORD scl = clst, ecl = clst, rt[2];
946 #endif
947
948 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
949 res = FR_INT_ERR;
950
951 } else {
952 res = FR_OK;
953 while (clst < fs->n_fatent) { /* Not a last link? */
954 nxt = get_fat(fs, clst); /* Get cluster status */
955 if (nxt == 0) break; /* Empty cluster? */
956 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
957 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
958 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
959 if (res != FR_OK) break;
960 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSINFO */
961 fs->free_clust++;
962 fs->fsi_flag |= 1;
963 }
964 #if _USE_TRIM
965 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
966 ecl = nxt;
967 } else { /* End of contiguous clusters */
968 rt[0] = clust2sect(fs, scl); /* Start sector */
969 rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */
970 disk_ioctl(fs->drv, CTRL_TRIM, rt); /* Erase the block */
971 scl = ecl = nxt;
972 }
973 #endif
974 clst = nxt; /* Next cluster */
975 }
976 }
977
978 return res;
979 }
980 #endif
981
982
983
984
985 /*-----------------------------------------------------------------------*/
986 /* FAT handling - Stretch or Create a cluster chain */
987 /*-----------------------------------------------------------------------*/
988 #if !_FS_READONLY
989 static
990 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
991 FATFS* fs, /* File system object */
992 DWORD clst /* Cluster# to stretch, 0:Create a new chain */
993 )
994 {
995 DWORD cs, ncl, scl;
996 FRESULT res;
997
998
999 if (clst == 0) { /* Create a new chain */
1000 scl = fs->last_clust; /* Get suggested start point */
1001 if (!scl || scl >= fs->n_fatent) scl = 1;
1002 }
1003 else { /* Stretch the current chain */
1004 cs = get_fat(fs, clst); /* Check the cluster status */
1005 if (cs < 2) return 1; /* Invalid value */
1006 if (cs == 0xFFFFFFFF) return cs; /* A disk error occurred */
1007 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
1008 scl = clst;
1009 }
1010
1011 ncl = scl; /* Start cluster */
1012 for (;;) {
1013 ncl++; /* Next cluster */
1014 if (ncl >= fs->n_fatent) { /* Check wrap around */
1015 ncl = 2;
1016 if (ncl > scl) return 0; /* No free cluster */
1017 }
1018 cs = get_fat(fs, ncl); /* Get the cluster status */
1019 if (cs == 0) break; /* Found a free cluster */
1020 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */
1021 return cs;
1022 if (ncl == scl) return 0; /* No free cluster */
1023 }
1024
1025 res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */
1026 if (res == FR_OK && clst != 0) {
1027 res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */
1028 }
1029 if (res == FR_OK) {
1030 fs->last_clust = ncl; /* Update FSINFO */
1031 if (fs->free_clust != 0xFFFFFFFF) {
1032 fs->free_clust--;
1033 fs->fsi_flag |= 1;
1034 }
1035 } else {
1036 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
1037 }
1038
1039 return ncl; /* Return new cluster number or error code */
1040 }
1041 #endif /* !_FS_READONLY */
1042
1043
1044
1045
1046 /*-----------------------------------------------------------------------*/
1047 /* FAT handling - Convert offset into cluster with link map table */
1048 /*-----------------------------------------------------------------------*/
1049
1050 #if _USE_FASTSEEK
1051 static
1052 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
1053 FIL* fp, /* Pointer to the file object */
1054 DWORD ofs /* File offset to be converted to cluster# */
1055 )
1056 {
1057 DWORD cl, ncl, *tbl;
1058
1059
1060 tbl = fp->cltbl + 1; /* Top of CLMT */
1061 cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */
1062 for (;;) {
1063 ncl = *tbl++; /* Number of cluters in the fragment */
1064 if (!ncl) return 0; /* End of table? (error) */
1065 if (cl < ncl) break; /* In this fragment? */
1066 cl -= ncl; tbl++; /* Next fragment */
1067 }
1068 return cl + *tbl; /* Return the cluster number */
1069 }
1070 #endif /* _USE_FASTSEEK */
1071
1072
1073
1074
1075 /*-----------------------------------------------------------------------*/
1076 /* Directory handling - Set directory index */
1077 /*-----------------------------------------------------------------------*/
1078
1079 static
1080 FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */
1081 DIR* dp, /* Pointer to directory object */
1082 UINT idx /* Index of directory table */
1083 )
1084 {
1085 DWORD clst, sect;
1086 UINT ic;
1087
1088
1089 dp->index = (WORD)idx; /* Current index */
1090 clst = dp->sclust; /* Table start cluster (0:root) */
1091 if (clst == 1 || clst >= dp->fs->n_fatent) /* Check start cluster range */
1092 return FR_INT_ERR;
1093 if (!clst && dp->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
1094 clst = dp->fs->dirbase;
1095
1096 if (clst == 0) { /* Static table (root-directory in FAT12/16) */
1097 if (idx >= dp->fs->n_rootdir) /* Is index out of range? */
1098 return FR_INT_ERR;
1099 sect = dp->fs->dirbase;
1100 }
1101 else { /* Dynamic table (root-directory in FAT32 or sub-directory) */
1102 ic = SS(dp->fs) / SZ_DIRE * dp->fs->csize; /* Entries per cluster */
1103 while (idx >= ic) { /* Follow cluster chain */
1104 clst = get_fat(dp->fs, clst); /* Get next cluster */
1105 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1106 if (clst < 2 || clst >= dp->fs->n_fatent) /* Reached to end of table or internal error */
1107 return FR_INT_ERR;
1108 idx -= ic;
1109 }
1110 sect = clust2sect(dp->fs, clst);
1111 }
1112 dp->clust = clst; /* Current cluster# */
1113 if (!sect) return FR_INT_ERR;
1114 dp->sect = sect + idx / (SS(dp->fs) / SZ_DIRE); /* Sector# of the directory entry */
1115 dp->dir = dp->fs->win + (idx % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Ptr to the entry in the sector */
1116
1117 return FR_OK;
1118 }
1119
1120
1121
1122
1123 /*-----------------------------------------------------------------------*/
1124 /* Directory handling - Move directory table index next */
1125 /*-----------------------------------------------------------------------*/
1126
1127 static
1128 FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
1129 DIR* dp, /* Pointer to the directory object */
1130 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
1131 )
1132 {
1133 DWORD clst;
1134 UINT i;
1135 #if !_FS_READONLY
1136 UINT c;
1137 #endif
1138
1139
1140 i = dp->index + 1;
1141 if (!(i & 0xFFFF) || !dp->sect) /* Report EOT when index has reached 65535 */
1142 return FR_NO_FILE;
1143
1144 if (!(i % (SS(dp->fs) / SZ_DIRE))) { /* Sector changed? */
1145 dp->sect++; /* Next sector */
1146
1147 if (!dp->clust) { /* Static table */
1148 if (i >= dp->fs->n_rootdir) /* Report EOT if it reached end of static table */
1149 return FR_NO_FILE;
1150 }
1151 else { /* Dynamic table */
1152 if (((i / (SS(dp->fs) / SZ_DIRE)) & (dp->fs->csize - 1)) == 0) { /* Cluster changed? */
1153 clst = get_fat(dp->fs, dp->clust); /* Get next cluster */
1154 if (clst <= 1) return FR_INT_ERR;
1155 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1156 if (clst >= dp->fs->n_fatent) { /* If it reached end of dynamic table, */
1157 #if !_FS_READONLY
1158 if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT */
1159 clst = create_chain(dp->fs, dp->clust); /* Stretch cluster chain */
1160 if (clst == 0) return FR_DENIED; /* No free cluster */
1161 if (clst == 1) return FR_INT_ERR;
1162 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1163 /* Clean-up stretched table */
1164 if (sync_window(dp->fs)) return FR_DISK_ERR;/* Flush disk access window */
1165 mem_set(dp->fs->win, 0, SS(dp->fs)); /* Clear window buffer */
1166 dp->fs->winsect = clust2sect(dp->fs, clst); /* Cluster start sector */
1167 for (c = 0; c < dp->fs->csize; c++) { /* Fill the new cluster with 0 */
1168 dp->fs->wflag = 1;
1169 if (sync_window(dp->fs)) return FR_DISK_ERR;
1170 dp->fs->winsect++;
1171 }
1172 dp->fs->winsect -= c; /* Rewind window offset */
1173 #else
1174 if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT (this is to suppress warning) */
1175 return FR_NO_FILE; /* Report EOT */
1176 #endif
1177 }
1178 dp->clust = clst; /* Initialize data for new cluster */
1179 dp->sect = clust2sect(dp->fs, clst);
1180 }
1181 }
1182 }
1183
1184 dp->index = (WORD)i; /* Current index */
1185 dp->dir = dp->fs->win + (i % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Current entry in the window */
1186
1187 return FR_OK;
1188 }
1189
1190
1191
1192
1193 /*-----------------------------------------------------------------------*/
1194 /* Directory handling - Reserve directory entry */
1195 /*-----------------------------------------------------------------------*/
1196
1197 #if !_FS_READONLY
1198 static
1199 FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */
1200 DIR* dp, /* Pointer to the directory object */
1201 UINT nent /* Number of contiguous entries to allocate (1-21) */
1202 )
1203 {
1204 FRESULT res;
1205 UINT n;
1206
1207
1208 res = dir_sdi(dp, 0);
1209 if (res == FR_OK) {
1210 n = 0;
1211 do {
1212 res = move_window(dp->fs, dp->sect);
1213 if (res != FR_OK) break;
1214 if (dp->dir[0] == DDEM || dp->dir[0] == 0) { /* Is it a free entry? */
1215 if (++n == nent) break; /* A block of contiguous free entries is found */
1216 } else {
1217 n = 0; /* Not a blank entry. Restart to search */
1218 }
1219 res = dir_next(dp, 1); /* Next entry with table stretch enabled */
1220 } while (res == FR_OK);
1221 }
1222 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
1223 return res;
1224 }
1225 #endif
1226
1227
1228
1229
1230 /*-----------------------------------------------------------------------*/
1231 /* Directory handling - Load/Store start cluster number */
1232 /*-----------------------------------------------------------------------*/
1233
1234 static
1235 DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */
1236 FATFS* fs, /* Pointer to the fs object */
1237 const BYTE* dir /* Pointer to the SFN entry */
1238 )
1239 {
1240 DWORD cl;
1241
1242 cl = LD_WORD(dir + DIR_FstClusLO);
1243 if (fs->fs_type == FS_FAT32)
1244 cl |= (DWORD)LD_WORD(dir + DIR_FstClusHI) << 16;
1245
1246 return cl;
1247 }
1248
1249
1250 #if !_FS_READONLY
1251 static
1252 void st_clust (
1253 BYTE* dir, /* Pointer to the SFN entry */
1254 DWORD cl /* Value to be set */
1255 )
1256 {
1257 ST_WORD(dir + DIR_FstClusLO, cl);
1258 ST_WORD(dir + DIR_FstClusHI, cl >> 16);
1259 }
1260 #endif
1261
1262
1263
1264
1265 /*-----------------------------------------------------------------------*/
1266 /* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
1267 /*-----------------------------------------------------------------------*/
1268 #if _USE_LFN
1269 static
1270 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN characters in the directory entry */
1271
1272
1273 static
1274 int cmp_lfn ( /* 1:matched, 0:not matched */
1275 WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */
1276 BYTE* dir /* Pointer to the directory entry containing the part of LFN */
1277 )
1278 {
1279 UINT i, s;
1280 WCHAR wc, uc;
1281
1282
1283 if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
1284
1285 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1286
1287 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1288 uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */
1289 if (wc) {
1290 if (i >= _MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) /* Compare it */
1291 return 0; /* Not matched */
1292 wc = uc;
1293 } else {
1294 if (uc != 0xFFFF) return 0; /* Check filler */
1295 }
1296 }
1297
1298 if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) /* Last segment matched but different length */
1299 return 0;
1300
1301 return 1; /* The part of LFN matched */
1302 }
1303
1304
1305
1306 static
1307 int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */
1308 WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
1309 BYTE* dir /* Pointer to the LFN entry */
1310 )
1311 {
1312 UINT i, s;
1313 WCHAR wc, uc;
1314
1315
1316 if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
1317
1318 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1319
1320 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1321 uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */
1322 if (wc) {
1323 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
1324 lfnbuf[i++] = wc = uc; /* Store it */
1325 } else {
1326 if (uc != 0xFFFF) return 0; /* Check filler */
1327 }
1328 }
1329
1330 if (dir[LDIR_Ord] & LLEF) { /* Put terminator if it is the last LFN part */
1331 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
1332 lfnbuf[i] = 0;
1333 }
1334
1335 return 1; /* The part of LFN is valid */
1336 }
1337
1338
1339 #if !_FS_READONLY
1340 static
1341 void fit_lfn (
1342 const WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
1343 BYTE* dir, /* Pointer to the LFN entry to be processed */
1344 BYTE ord, /* LFN order (1-20) */
1345 BYTE sum /* Checksum of the corresponding SFN */
1346 )
1347 {
1348 UINT i, s;
1349 WCHAR wc;
1350
1351
1352 dir[LDIR_Chksum] = sum; /* Set checksum */
1353 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
1354 dir[LDIR_Type] = 0;
1355 ST_WORD(dir + LDIR_FstClusLO, 0);
1356
1357 i = (ord - 1) * 13; /* Get offset in the LFN working buffer */
1358 s = wc = 0;
1359 do {
1360 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective character */
1361 ST_WORD(dir+LfnOfs[s], wc); /* Put it */
1362 if (!wc) wc = 0xFFFF; /* Padding characters following last character */
1363 } while (++s < 13);
1364 if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLEF; /* Bottom LFN part is the start of LFN sequence */
1365 dir[LDIR_Ord] = ord; /* Set the LFN order */
1366 }
1367
1368 #endif
1369 #endif
1370
1371
1372
1373
1374 /*-----------------------------------------------------------------------*/
1375 /* Create numbered name */
1376 /*-----------------------------------------------------------------------*/
1377 #if _USE_LFN
1378 static
1379 void gen_numname (
1380 BYTE* dst, /* Pointer to the buffer to store numbered SFN */
1381 const BYTE* src, /* Pointer to SFN */
1382 const WCHAR* lfn, /* Pointer to LFN */
1383 UINT seq /* Sequence number */
1384 )
1385 {
1386 BYTE ns[8], c;
1387 UINT i, j;
1388 WCHAR wc;
1389 DWORD sr;
1390
1391
1392 mem_cpy(dst, src, 11);
1393
1394 if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */
1395 sr = seq;
1396 while (*lfn) { /* Create a CRC */
1397 wc = *lfn++;
1398 for (i = 0; i < 16; i++) {
1399 sr = (sr << 1) + (wc & 1);
1400 wc >>= 1;
1401 if (sr & 0x10000) sr ^= 0x11021;
1402 }
1403 }
1404 seq = (UINT)sr;
1405 }
1406
1407 /* itoa (hexdecimal) */
1408 i = 7;
1409 do {
1410 c = (seq % 16) + '0';
1411 if (c > '9') c += 7;
1412 ns[i--] = c;
1413 seq /= 16;
1414 } while (seq);
1415 ns[i] = '~';
1416
1417 /* Append the number */
1418 for (j = 0; j < i && dst[j] != ' '; j++) {
1419 if (IsDBCS1(dst[j])) {
1420 if (j == i - 1) break;
1421 j++;
1422 }
1423 }
1424 do {
1425 dst[j++] = (i < 8) ? ns[i++] : ' ';
1426 } while (j < 8);
1427 }
1428 #endif
1429
1430
1431
1432
1433 /*-----------------------------------------------------------------------*/
1434 /* Calculate checksum of an SFN entry */
1435 /*-----------------------------------------------------------------------*/
1436 #if _USE_LFN
1437 static
1438 BYTE sum_sfn (
1439 const BYTE* dir /* Pointer to the SFN entry */
1440 )
1441 {
1442 BYTE sum = 0;
1443 UINT n = 11;
1444
1445 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
1446 return sum;
1447 }
1448 #endif
1449
1450
1451
1452
1453 /*-----------------------------------------------------------------------*/
1454 /* Directory handling - Find an object in the directory */
1455 /*-----------------------------------------------------------------------*/
1456
1457 static
1458 FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */
1459 DIR* dp /* Pointer to the directory object linked to the file name */
1460 )
1461 {
1462 FRESULT res;
1463 BYTE c, *dir;
1464 #if _USE_LFN
1465 BYTE a, ord, sum;
1466 #endif
1467
1468 res = dir_sdi(dp, 0); /* Rewind directory object */
1469 if (res != FR_OK) return res;
1470
1471 #if _USE_LFN
1472 ord = sum = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1473 #endif
1474 do {
1475 res = move_window(dp->fs, dp->sect);
1476 if (res != FR_OK) break;
1477 dir = dp->dir; /* Ptr to the directory entry of current index */
1478 c = dir[DIR_Name];
1479 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
1480 #if _USE_LFN /* LFN configuration */
1481 a = dir[DIR_Attr] & AM_MASK;
1482 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
1483 ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1484 } else {
1485 if (a == AM_LFN) { /* An LFN entry is found */
1486 if (dp->lfn) {
1487 if (c & LLEF) { /* Is it start of LFN sequence? */
1488 sum = dir[LDIR_Chksum];
1489 c &= ~LLEF; ord = c; /* LFN start order */
1490 dp->lfn_idx = dp->index; /* Start index of LFN */
1491 }
1492 /* Check validity of the LFN entry and compare it with given name */
1493 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
1494 }
1495 } else { /* An SFN entry is found */
1496 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
1497 if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dir, dp->fn, 11)) break; /* SFN matched? */
1498 ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1499 }
1500 }
1501 #else /* Non LFN configuration */
1502 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dp->fn, 11)) /* Is it a valid entry? */
1503 break;
1504 #endif
1505 res = dir_next(dp, 0); /* Next entry */
1506 } while (res == FR_OK);
1507
1508 return res;
1509 }
1510
1511
1512
1513
1514 /*-----------------------------------------------------------------------*/
1515 /* Read an object from the directory */
1516 /*-----------------------------------------------------------------------*/
1517 #if _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2
1518 static
1519 FRESULT dir_read (
1520 DIR* dp, /* Pointer to the directory object */
1521 int vol /* Filtered by 0:file/directory or 1:volume label */
1522 )
1523 {
1524 FRESULT res;
1525 BYTE a, c, *dir;
1526 #if _USE_LFN
1527 BYTE ord = 0xFF, sum = 0xFF;
1528 #endif
1529
1530 res = FR_NO_FILE;
1531 while (dp->sect) {
1532 res = move_window(dp->fs, dp->sect);
1533 if (res != FR_OK) break;
1534 dir = dp->dir; /* Ptr to the directory entry of current index */
1535 c = dir[DIR_Name];
1536 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
1537 a = dir[DIR_Attr] & AM_MASK;
1538 #if _USE_LFN /* LFN configuration */
1539 if (c == DDEM || (!_FS_RPATH && c == '.') || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */
1540 ord = 0xFF;
1541 } else {
1542 if (a == AM_LFN) { /* An LFN entry is found */
1543 if (c & LLEF) { /* Is it start of LFN sequence? */
1544 sum = dir[LDIR_Chksum];
1545 c &= ~LLEF; ord = c;
1546 dp->lfn_idx = dp->index;
1547 }
1548 /* Check LFN validity and capture it */
1549 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
1550 } else { /* An SFN entry is found */
1551 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
1552 dp->lfn_idx = 0xFFFF; /* It has no LFN. */
1553 break;
1554 }
1555 }
1556 #else /* Non LFN configuration */
1557 if (c != DDEM && (_FS_RPATH || c != '.') && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) /* Is it a valid entry? */
1558 break;
1559 #endif
1560 res = dir_next(dp, 0); /* Next entry */
1561 if (res != FR_OK) break;
1562 }
1563
1564 if (res != FR_OK) dp->sect = 0;
1565
1566 return res;
1567 }
1568 #endif /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */
1569
1570
1571
1572
1573 /*-----------------------------------------------------------------------*/
1574 /* Register an object to the directory */
1575 /*-----------------------------------------------------------------------*/
1576 #if !_FS_READONLY
1577 static
1578 FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */
1579 DIR* dp /* Target directory with object name to be created */
1580 )
1581 {
1582 FRESULT res;
1583 #if _USE_LFN /* LFN configuration */
1584 UINT n, nent;
1585 BYTE sn[12], *fn, sum;
1586 WCHAR *lfn;
1587
1588
1589 fn = dp->fn; lfn = dp->lfn;
1590 mem_cpy(sn, fn, 12);
1591
1592 if (_FS_RPATH && (sn[NSFLAG] & NS_DOT)) /* Cannot create dot entry */
1593 return FR_INVALID_NAME;
1594
1595 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
1596 fn[NSFLAG] = 0; dp->lfn = 0; /* Find only SFN */
1597 for (n = 1; n < 100; n++) {
1598 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
1599 res = dir_find(dp); /* Check if the name collides with existing SFN */
1600 if (res != FR_OK) break;
1601 }
1602 if (n == 100) return FR_DENIED; /* Abort if too many collisions */
1603 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
1604 fn[NSFLAG] = sn[NSFLAG]; dp->lfn = lfn;
1605 }
1606
1607 if (sn[NSFLAG] & NS_LFN) { /* When LFN is to be created, allocate entries for an SFN + LFNs. */
1608 for (n = 0; lfn[n]; n++) ;
1609 nent = (n + 25) / 13;
1610 } else { /* Otherwise allocate an entry for an SFN */
1611 nent = 1;
1612 }
1613 res = dir_alloc(dp, nent); /* Allocate entries */
1614
1615 if (res == FR_OK && --nent) { /* Set LFN entry if needed */
1616 res = dir_sdi(dp, dp->index - nent);
1617 if (res == FR_OK) {
1618 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */
1619 do { /* Store LFN entries in bottom first */
1620 res = move_window(dp->fs, dp->sect);
1621 if (res != FR_OK) break;
1622 fit_lfn(dp->lfn, dp->dir, (BYTE)nent, sum);
1623 dp->fs->wflag = 1;
1624 res = dir_next(dp, 0); /* Next entry */
1625 } while (res == FR_OK && --nent);
1626 }
1627 }
1628 #else /* Non LFN configuration */
1629 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */
1630 #endif
1631
1632 if (res == FR_OK) { /* Set SFN entry */
1633 res = move_window(dp->fs, dp->sect);
1634 if (res == FR_OK) {
1635 mem_set(dp->dir, 0, SZ_DIRE); /* Clean the entry */
1636 mem_cpy(dp->dir, dp->fn, 11); /* Put SFN */
1637 #if _USE_LFN
1638 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */
1639 #endif
1640 dp->fs->wflag = 1;
1641 }
1642 }
1643
1644 return res;
1645 }
1646 #endif /* !_FS_READONLY */
1647
1648
1649
1650
1651 /*-----------------------------------------------------------------------*/
1652 /* Remove an object from the directory */
1653 /*-----------------------------------------------------------------------*/
1654 #if !_FS_READONLY && !_FS_MINIMIZE
1655 static
1656 FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */
1657 DIR* dp /* Directory object pointing the entry to be removed */
1658 )
1659 {
1660 FRESULT res;
1661 #if _USE_LFN /* LFN configuration */
1662 UINT i;
1663
1664 i = dp->index; /* SFN index */
1665 res = dir_sdi(dp, (dp->lfn_idx == 0xFFFF) ? i : dp->lfn_idx); /* Goto the SFN or top of the LFN entries */
1666 if (res == FR_OK) {
1667 do {
1668 res = move_window(dp->fs, dp->sect);
1669 if (res != FR_OK) break;
1670 mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */
1671 *dp->dir = DDEM;
1672 dp->fs->wflag = 1;
1673 if (dp->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
1674 res = dir_next(dp, 0); /* Next entry */
1675 } while (res == FR_OK);
1676 if (res == FR_NO_FILE) res = FR_INT_ERR;
1677 }
1678
1679 #else /* Non LFN configuration */
1680 res = dir_sdi(dp, dp->index);
1681 if (res == FR_OK) {
1682 res = move_window(dp->fs, dp->sect);
1683 if (res == FR_OK) {
1684 mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */
1685 *dp->dir = DDEM;
1686 dp->fs->wflag = 1;
1687 }
1688 }
1689 #endif
1690
1691 return res;
1692 }
1693 #endif /* !_FS_READONLY */
1694
1695
1696
1697
1698 /*-----------------------------------------------------------------------*/
1699 /* Get file information from directory entry */
1700 /*-----------------------------------------------------------------------*/
1701 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2
1702 static
1703 void get_fileinfo ( /* No return code */
1704 DIR* dp, /* Pointer to the directory object */
1705 FILINFO* fno /* Pointer to the file information to be filled */
1706 )
1707 {
1708 UINT i;
1709 TCHAR *p, c;
1710 BYTE *dir;
1711 #if _USE_LFN
1712 WCHAR w, *lfn;
1713 #endif
1714
1715 p = fno->fname;
1716 if (dp->sect) { /* Get SFN */
1717 dir = dp->dir;
1718 i = 0;
1719 while (i < 11) { /* Copy name body and extension */
1720 c = (TCHAR)dir[i++];
1721 if (c == ' ') continue; /* Skip padding spaces */
1722 if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */
1723 if (i == 9) *p++ = '.'; /* Insert a . if extension is exist */
1724 #if _USE_LFN
1725 if (IsUpper(c) && (dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY)))
1726 c += 0x20; /* To lower */
1727 #if _LFN_UNICODE
1728 if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dir[i]))
1729 c = c << 8 | dir[i++];
1730 c = ff_convert(c, 1); /* OEM -> Unicode */
1731 if (!c) c = '?';
1732 #endif
1733 #endif
1734 *p++ = c;
1735 }
1736 fno->fattrib = dir[DIR_Attr]; /* Attribute */
1737 fno->fsize = LD_DWORD(dir + DIR_FileSize); /* Size */
1738 fno->fdate = LD_WORD(dir + DIR_WrtDate); /* Date */
1739 fno->ftime = LD_WORD(dir + DIR_WrtTime); /* Time */
1740 }
1741 *p = 0; /* Terminate SFN string by a \0 */
1742
1743 #if _USE_LFN
1744 if (fno->lfname) {
1745 i = 0; p = fno->lfname;
1746 if (dp->sect && fno->lfsize && dp->lfn_idx != 0xFFFF) { /* Get LFN if available */
1747 lfn = dp->lfn;
1748 while ((w = *lfn++) != 0) { /* Get an LFN character */
1749 #if !_LFN_UNICODE
1750 w = ff_convert(w, 0); /* Unicode -> OEM */
1751 if (!w) { i = 0; break; } /* No LFN if it could not be converted */
1752 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
1753 p[i++] = (TCHAR)(w >> 8);
1754 #endif
1755 if (i >= fno->lfsize - 1) { i = 0; break; } /* No LFN if buffer overflow */
1756 p[i++] = (TCHAR)w;
1757 }
1758 }
1759 p[i] = 0; /* Terminate LFN string by a \0 */
1760 }
1761 #endif
1762 }
1763 #endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */
1764
1765
1766
1767
1768 /*-----------------------------------------------------------------------*/
1769 /* Pattern matching */
1770 /*-----------------------------------------------------------------------*/
1771 #if _USE_FIND && _FS_MINIMIZE <= 1
1772 static
1773 WCHAR get_achar ( /* Get a character and advances ptr 1 or 2 */
1774 const TCHAR** ptr /* Pointer to pointer to the SBCS/DBCS/Unicode string */
1775 )
1776 {
1777 WCHAR chr;
1778
1779 #if !_LFN_UNICODE
1780 chr = (BYTE)*(*ptr)++; /* Get a byte */
1781 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */
1782 if (IsDBCS1(chr) && IsDBCS2(**ptr)) /* Get DBC 2nd byte if needed */
1783 chr = chr << 8 | (BYTE)*(*ptr)++;
1784 #ifdef _EXCVT
1785 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
1786 #endif
1787 #else
1788 chr = ff_wtoupper(*(*ptr)++); /* Get a word and to upper */
1789 #endif
1790 return chr;
1791 }
1792
1793
1794 static
1795 int pattern_matching ( /* 0:mismatched, 1:matched */
1796 const TCHAR* pat, /* Matching pattern */
1797 const TCHAR* nam, /* String to be tested */
1798 int skip, /* Number of pre-skip chars (number of ?s) */
1799 int inf /* Infinite search (* specified) */
1800 )
1801 {
1802 const TCHAR *pp, *np;
1803 WCHAR pc, nc;
1804 int nm, nx;
1805
1806
1807 while (skip--) { /* Pre-skip name chars */
1808 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */
1809 }
1810 if (!*pat && inf) return 1; /* (short circuit) */
1811
1812 do {
1813 pp = pat; np = nam; /* Top of pattern and name to match */
1814 for (;;) {
1815 if (*pp == '?' || *pp == '*') { /* Wildcard? */
1816 nm = nx = 0;
1817 do { /* Analyze the wildcard chars */
1818 if (*pp++ == '?') nm++; else nx = 1;
1819 } while (*pp == '?' || *pp == '*');
1820 if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */
1821 nc = *np; break; /* Branch mismatched */
1822 }
1823 pc = get_achar(&pp); /* Get a pattern char */
1824 nc = get_achar(&np); /* Get a name char */
1825 if (pc != nc) break; /* Branch mismatched? */
1826 if (!pc) return 1; /* Branch matched? (matched at end of both strings) */
1827 }
1828 get_achar(&nam); /* nam++ */
1829 } while (inf && nc); /* Retry until end of name if infinite search is specified */
1830
1831 return 0;
1832 }
1833 #endif /* _USE_FIND && _FS_MINIMIZE <= 1 */
1834
1835
1836
1837
1838 /*-----------------------------------------------------------------------*/
1839 /* Pick a top segment and create the object name in directory form */
1840 /*-----------------------------------------------------------------------*/
1841
1842 static
1843 FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */
1844 DIR* dp, /* Pointer to the directory object */
1845 const TCHAR** path /* Pointer to pointer to the segment in the path string */
1846 )
1847 {
1848 #if _USE_LFN /* LFN configuration */
1849 BYTE b, cf;
1850 WCHAR w, *lfn;
1851 UINT i, ni, si, di;
1852 const TCHAR *p;
1853
1854 /* Create LFN in Unicode */
1855 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
1856 lfn = dp->lfn;
1857 si = di = 0;
1858 for (;;) {
1859 w = p[si++]; /* Get a character */
1860 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */
1861 if (di >= _MAX_LFN) /* Reject too long name */
1862 return FR_INVALID_NAME;
1863 #if !_LFN_UNICODE
1864 w &= 0xFF;
1865 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
1866 b = (BYTE)p[si++]; /* Get 2nd byte */
1867 w = (w << 8) + b; /* Create a DBC */
1868 if (!IsDBCS2(b))
1869 return FR_INVALID_NAME; /* Reject invalid sequence */
1870 }
1871 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */
1872 if (!w) return FR_INVALID_NAME; /* Reject invalid code */
1873 #endif
1874 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal characters for LFN */
1875 return FR_INVALID_NAME;
1876 lfn[di++] = w; /* Store the Unicode character */
1877 }
1878 *path = &p[si]; /* Return pointer to the next segment */
1879 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
1880 #if _FS_RPATH
1881 if ((di == 1 && lfn[di - 1] == '.') ||
1882 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot entry? */
1883 lfn[di] = 0;
1884 for (i = 0; i < 11; i++) /* Create dot name for SFN entry */
1885 dp->fn[i] = (i < di) ? '.' : ' ';
1886 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */
1887 return FR_OK;
1888 }
1889 #endif
1890 while (di) { /* Snip off trailing spaces and dots if exist */
1891 w = lfn[di - 1];
1892 if (w != ' ' && w != '.') break;
1893 di--;
1894 }
1895 if (!di) return FR_INVALID_NAME; /* Reject nul string */
1896 lfn[di] = 0; /* LFN is created */
1897
1898 /* Create SFN in directory form */
1899 mem_set(dp->fn, ' ', 11);
1900 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
1901 if (si) cf |= NS_LOSS | NS_LFN;
1902 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
1903
1904 b = i = 0; ni = 8;
1905 for (;;) {
1906 w = lfn[si++]; /* Get an LFN character */
1907 if (!w) break; /* Break on end of the LFN */
1908 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
1909 cf |= NS_LOSS | NS_LFN; continue;
1910 }
1911
1912 if (i >= ni || si == di) { /* Extension or end of SFN */
1913 if (ni == 11) { /* Long extension */
1914 cf |= NS_LOSS | NS_LFN; break;
1915 }
1916 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
1917 if (si > di) break; /* No extension */
1918 si = di; i = 8; ni = 11; /* Enter extension section */
1919 b <<= 2; continue;
1920 }
1921
1922 if (w >= 0x80) { /* Non ASCII character */
1923 #ifdef _EXCVT
1924 w = ff_convert(w, 0); /* Unicode -> OEM code */
1925 if (w) w = ExCvt[w - 0x80]; /* Convert extended character to upper (SBCS) */
1926 #else
1927 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
1928 #endif
1929 cf |= NS_LFN; /* Force create LFN entry */
1930 }
1931
1932 if (_DF1S && w >= 0x100) { /* Is this DBC? (always false at SBCS cfg) */
1933 if (i >= ni - 1) {
1934 cf |= NS_LOSS | NS_LFN; i = ni; continue;
1935 }
1936 dp->fn[i++] = (BYTE)(w >> 8);
1937 } else { /* SBC */
1938 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */
1939 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
1940 } else {
1941 if (IsUpper(w)) { /* ASCII large capital */
1942 b |= 2;
1943 } else {
1944 if (IsLower(w)) { /* ASCII small capital */
1945 b |= 1; w -= 0x20;
1946 }
1947 }
1948 }
1949 }
1950 dp->fn[i++] = (BYTE)w;
1951 }
1952
1953 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
1954
1955 if (ni == 8) b <<= 2;
1956 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
1957 cf |= NS_LFN;
1958 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */
1959 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
1960 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
1961 }
1962
1963 dp->fn[NSFLAG] = cf; /* SFN is created */
1964
1965 return FR_OK;
1966
1967
1968 #else /* Non-LFN configuration */
1969 BYTE b, c, d, *sfn;
1970 UINT ni, si, i;
1971 const char *p;
1972
1973 /* Create file name in directory form */
1974 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Skip duplicated separator */
1975 sfn = dp->fn;
1976 mem_set(sfn, ' ', 11);
1977 si = i = b = 0; ni = 8;
1978 #if _FS_RPATH
1979 if (p[si] == '.') { /* Is this a dot entry? */
1980 for (;;) {
1981 c = (BYTE)p[si++];
1982 if (c != '.' || si >= 3) break;
1983 sfn[i++] = c;
1984 }
1985 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
1986 *path = &p[si]; /* Return pointer to the next segment */
1987 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */
1988 return FR_OK;
1989 }
1990 #endif
1991 for (;;) {
1992 c = (BYTE)p[si++];
1993 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */
1994 if (c == '.' || i >= ni) {
1995 if (ni != 8 || c != '.') return FR_INVALID_NAME;
1996 i = 8; ni = 11;
1997 b <<= 2; continue;
1998 }
1999 if (c >= 0x80) { /* Extended character? */
2000 b |= 3; /* Eliminate NT flag */
2001 #ifdef _EXCVT
2002 c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */
2003 #else
2004 #if !_DF1S
2005 return FR_INVALID_NAME; /* Reject extended characters (ASCII cfg) */
2006 #endif
2007 #endif
2008 }
2009 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false at SBCS cfg.) */
2010 d = (BYTE)p[si++]; /* Get 2nd byte */
2011 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
2012 return FR_INVALID_NAME;
2013 sfn[i++] = c;
2014 sfn[i++] = d;
2015 } else { /* SBC */
2016 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */
2017 return FR_INVALID_NAME;
2018 if (IsUpper(c)) { /* ASCII large capital? */
2019 b |= 2;
2020 } else {
2021 if (IsLower(c)) { /* ASCII small capital? */
2022 b |= 1; c -= 0x20;
2023 }
2024 }
2025 sfn[i++] = c;
2026 }
2027 }
2028 *path = &p[si]; /* Return pointer to the next segment */
2029 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
2030
2031 if (!i) return FR_INVALID_NAME; /* Reject nul string */
2032 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* When first character collides with DDEM, replace it with RDDEM */
2033
2034 if (ni == 8) b <<= 2;
2035 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */
2036 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */
2037
2038 sfn[NSFLAG] = c; /* Store NT flag, File name is created */
2039
2040 return FR_OK;
2041 #endif
2042 }
2043
2044
2045
2046
2047 /*-----------------------------------------------------------------------*/
2048 /* Follow a file path */
2049 /*-----------------------------------------------------------------------*/
2050
2051 static
2052 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
2053 DIR* dp, /* Directory object to return last directory and found object */
2054 const TCHAR* path /* Full-path string to find a file or directory */
2055 )
2056 {
2057 FRESULT res;
2058 BYTE *dir, ns;
2059
2060
2061 #if _FS_RPATH
2062 if (*path == '/' || *path == '\\') { /* There is a heading separator */
2063 path++; dp->sclust = 0; /* Strip it and start from the root directory */
2064 } else { /* No heading separator */
2065 dp->sclust = dp->fs->cdir; /* Start from the current directory */
2066 }
2067 #else
2068 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
2069 path++;
2070 dp->sclust = 0; /* Always start from the root directory */
2071 #endif
2072
2073 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */
2074 res = dir_sdi(dp, 0);
2075 dp->dir = 0;
2076 } else { /* Follow path */
2077 for (;;) {
2078 res = create_name(dp, &path); /* Get a segment name of the path */
2079 if (res != FR_OK) break;
2080 res = dir_find(dp); /* Find an object with the sagment name */
2081 ns = dp->fn[NSFLAG];
2082 if (res != FR_OK) { /* Failed to find the object */
2083 if (res == FR_NO_FILE) { /* Object is not found */
2084 if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, */
2085 dp->sclust = 0; dp->dir = 0; /* it is the root directory and stay there */
2086 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */
2087 res = FR_OK; /* Ended at the root directroy. Function completed. */
2088 } else { /* Could not find the object */
2089 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */
2090 }
2091 }
2092 break;
2093 }
2094 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */
2095 dir = dp->dir; /* Follow the sub-directory */
2096 if (!(dir[DIR_Attr] & AM_DIR)) { /* It is not a sub-directory and cannot follow */
2097 res = FR_NO_PATH; break;
2098 }
2099 dp->sclust = ld_clust(dp->fs, dir);
2100 }
2101 }
2102
2103 return res;
2104 }
2105
2106
2107
2108
2109 /*-----------------------------------------------------------------------*/
2110 /* Get logical drive number from path name */
2111 /*-----------------------------------------------------------------------*/
2112
2113 static
2114 int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */
2115 const TCHAR** path /* Pointer to pointer to the path name */
2116 )
2117 {
2118 const TCHAR *tp, *tt;
2119 UINT i;
2120 int vol = -1;
2121 #if _STR_VOLUME_ID /* Find string drive id */
2122 static const char* const str[] = {_VOLUME_STRS};
2123 const char *sp;
2124 char c;
2125 TCHAR tc;
2126 #endif
2127
2128
2129 if (*path) { /* If the pointer is not a null */
2130 for (tt = *path; (UINT)*tt >= (_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find ':' in the path */
2131 if (*tt == ':') { /* If a ':' is exist in the path name */
2132 tp = *path;
2133 i = *tp++ - '0';
2134 if (i < 10 && tp == tt) { /* Is there a numeric drive id? */
2135 if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
2136 vol = (int)i;
2137 *path = ++tt;
2138 }
2139 }
2140 #if _STR_VOLUME_ID
2141 else { /* No numeric drive number, find string drive id */
2142 i = 0; tt++;
2143 do {
2144 sp = str[i]; tp = *path;
2145 do { /* Compare a string drive id with path name */
2146 c = *sp++; tc = *tp++;
2147 if (IsLower(tc)) tc -= 0x20;
2148 } while (c && (TCHAR)c == tc);
2149 } while ((c || tp != tt) && ++i < _VOLUMES); /* Repeat for each id until pattern match */
2150 if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
2151 vol = (int)i;
2152 *path = tt;
2153 }
2154 }
2155 #endif
2156 return vol;
2157 }
2158 #if _FS_RPATH && _VOLUMES >= 2
2159 vol = CurrVol; /* Current drive */
2160 #else
2161 vol = 0; /* Drive 0 */
2162 #endif
2163 }
2164 return vol;
2165 }
2166
2167
2168
2169
2170 /*-----------------------------------------------------------------------*/
2171 /* Load a sector and check if it is an FAT boot sector */
2172 /*-----------------------------------------------------------------------*/
2173
2174 static
2175 BYTE check_fs ( /* 0:Valid FAT-BS, 1:Valid BS but not FAT, 2:Not a BS, 3:Disk error */
2176 FATFS* fs, /* File system object */
2177 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
2178 )
2179 {
2180 fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */
2181 if (move_window(fs, sect) != FR_OK) /* Load boot record */
2182 return 3;
2183
2184 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */
2185 return 2;
2186
2187 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
2188 return 0;
2189 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
2190 return 0;
2191
2192 return 1;
2193 }
2194
2195
2196
2197
2198 /*-----------------------------------------------------------------------*/
2199 /* Find logical drive and check if the volume is mounted */
2200 /*-----------------------------------------------------------------------*/
2201
2202 static
2203 FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */
2204 FATFS** rfs, /* Pointer to pointer to the found file system object */
2205 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
2206 BYTE wmode /* !=0: Check write protection for write access */
2207 )
2208 {
2209 BYTE fmt, *pt;
2210 int vol;
2211 DSTATUS stat;
2212 DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4];
2213 WORD nrsv;
2214 FATFS *fs;
2215 UINT i;
2216
2217
2218 /* Get logical drive number from the path name */
2219 *rfs = 0;
2220 vol = get_ldnumber(path);
2221 if (vol < 0) return FR_INVALID_DRIVE;
2222
2223 /* Check if the file system object is valid or not */
2224 fs = FatFs[vol]; /* Get pointer to the file system object */
2225 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
2226
2227 ENTER_FF(fs); /* Lock the volume */
2228 *rfs = fs; /* Return pointer to the file system object */
2229
2230 if (fs->fs_type) { /* If the volume has been mounted */
2231 stat = disk_status(fs->drv);
2232 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */
2233 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */
2234 return FR_WRITE_PROTECTED;
2235 return FR_OK; /* The file system object is valid */
2236 }
2237 }
2238
2239 /* The file system object is not valid. */
2240 /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
2241
2242 fs->fs_type = 0; /* Clear the file system object */
2243 fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */
2244 stat = disk_initialize(fs->drv); /* Initialize the physical drive */
2245 if (stat & STA_NOINIT) /* Check if the initialization succeeded */
2246 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
2247 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */
2248 return FR_WRITE_PROTECTED;
2249 #if _MAX_SS != _MIN_SS /* Get sector size (multiple sector size cfg only) */
2250 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
2251 || SS(fs) < _MIN_SS || SS(fs) > _MAX_SS) return FR_DISK_ERR;
2252 #endif
2253 /* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */
2254 bsect = 0;
2255 fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT boot sector as SFD */
2256 if (fmt == 1 || (!fmt && (LD2PT(vol)))) { /* Not an FAT boot sector or forced partition number */
2257 for (i = 0; i < 4; i++) { /* Get partition offset */
2258 pt = fs->win + MBR_Table + i * SZ_PTE;
2259 br[i] = pt[4] ? LD_DWORD(&pt[8]) : 0;
2260 }
2261 i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */
2262 if (i) i--;
2263 do { /* Find an FAT volume */
2264 bsect = br[i];
2265 fmt = bsect ? check_fs(fs, bsect) : 2; /* Check the partition */
2266 } while (!LD2PT(vol) && fmt && ++i < 4);
2267 }
2268 if (fmt == 3) return FR_DISK_ERR; /* An error occured in the disk I/O layer */
2269 if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */
2270
2271 /* An FAT volume is found. Following code initializes the file system object */
2272
2273 if (LD_WORD(fs->win + BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */
2274 return FR_NO_FILESYSTEM;
2275
2276 fasize = LD_WORD(fs->win + BPB_FATSz16); /* Number of sectors per FAT */
2277 if (!fasize) fasize = LD_DWORD(fs->win + BPB_FATSz32);
2278 fs->fsize = fasize;
2279
2280 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */
2281 if (fs->n_fats != 1 && fs->n_fats != 2) /* (Must be 1 or 2) */
2282 return FR_NO_FILESYSTEM;
2283 fasize *= fs->n_fats; /* Number of sectors for FAT area */
2284
2285 fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
2286 if (!fs->csize || (fs->csize & (fs->csize - 1))) /* (Must be power of 2) */
2287 return FR_NO_FILESYSTEM;
2288
2289 fs->n_rootdir = LD_WORD(fs->win + BPB_RootEntCnt); /* Number of root directory entries */
2290 if (fs->n_rootdir % (SS(fs) / SZ_DIRE)) /* (Must be sector aligned) */
2291 return FR_NO_FILESYSTEM;
2292
2293 tsect = LD_WORD(fs->win + BPB_TotSec16); /* Number of sectors on the volume */
2294 if (!tsect) tsect = LD_DWORD(fs->win + BPB_TotSec32);
2295
2296 nrsv = LD_WORD(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */
2297 if (!nrsv) return FR_NO_FILESYSTEM; /* (Must not be 0) */
2298
2299 /* Determine the FAT sub type */
2300 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIRE); /* RSV + FAT + DIR */
2301 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
2302 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
2303 if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
2304 fmt = FS_FAT12;
2305 if (nclst >= MIN_FAT16) fmt = FS_FAT16;
2306 if (nclst >= MIN_FAT32) fmt = FS_FAT32;
2307
2308 /* Boundaries and Limits */
2309 fs->n_fatent = nclst + 2; /* Number of FAT entries */
2310 fs->volbase = bsect; /* Volume start sector */
2311 fs->fatbase = bsect + nrsv; /* FAT start sector */
2312 fs->database = bsect + sysect; /* Data start sector */
2313 if (fmt == FS_FAT32) {
2314 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
2315 fs->dirbase = LD_DWORD(fs->win + BPB_RootClus); /* Root directory start cluster */
2316 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */
2317 } else {
2318 if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
2319 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
2320 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */
2321 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
2322 }
2323 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than the size needed) */
2324 return FR_NO_FILESYSTEM;
2325
2326 #if !_FS_READONLY
2327 /* Initialize cluster allocation information */
2328 fs->last_clust = fs->free_clust = 0xFFFFFFFF;
2329
2330 /* Get fsinfo if available */
2331 fs->fsi_flag = 0x80;
2332 #if (_FS_NOFSINFO & 3) != 3
2333 if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo == 1 */
2334 && LD_WORD(fs->win + BPB_FSInfo) == 1
2335 && move_window(fs, bsect + 1) == FR_OK)
2336 {
2337 fs->fsi_flag = 0;
2338 if (LD_WORD(fs->win + BS_55AA) == 0xAA55 /* Load FSINFO data if available */
2339 && LD_DWORD(fs->win + FSI_LeadSig) == 0x41615252
2340 && LD_DWORD(fs->win + FSI_StrucSig) == 0x61417272)
2341 {
2342 #if (_FS_NOFSINFO & 1) == 0
2343 fs->free_clust = LD_DWORD(fs->win + FSI_Free_Count);
2344 #endif
2345 #if (_FS_NOFSINFO & 2) == 0
2346 fs->last_clust = LD_DWORD(fs->win + FSI_Nxt_Free);
2347 #endif
2348 }
2349 }
2350 #endif
2351 #endif
2352 fs->fs_type = fmt; /* FAT sub-type */
2353 fs->id = ++Fsid; /* File system mount ID */
2354 #if _FS_RPATH
2355 fs->cdir = 0; /* Set current directory to root */
2356 #endif
2357 #if _FS_LOCK /* Clear file lock semaphores */
2358 clear_lock(fs);
2359 #endif
2360
2361 return FR_OK;
2362 }
2363
2364
2365
2366
2367 /*-----------------------------------------------------------------------*/
2368 /* Check if the file/directory object is valid or not */
2369 /*-----------------------------------------------------------------------*/
2370
2371 static
2372 FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
2373 void* obj /* Pointer to the object FIL/DIR to check validity */
2374 )
2375 {
2376 FIL *fil = (FIL*)obj; /* Assuming offset of .fs and .id in the FIL/DIR structure is identical */
2377
2378
2379 if (!fil || !fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id || (disk_status(fil->fs->drv) & STA_NOINIT))
2380 return FR_INVALID_OBJECT;
2381
2382 ENTER_FF(fil->fs); /* Lock file system */
2383
2384 return FR_OK;
2385 }
2386
2387
2388
2389
2390 /*--------------------------------------------------------------------------
2391
2392 Public Functions
2393
2394 ---------------------------------------------------------------------------*/
2395
2396
2397
2398 /*-----------------------------------------------------------------------*/
2399 /* Mount/Unmount a Logical Drive */
2400 /*-----------------------------------------------------------------------*/
2401
2402 FRESULT f_mount (
2403 FATFS* fs, /* Pointer to the file system object (NULL:unmount)*/
2404 const TCHAR* path, /* Logical drive number to be mounted/unmounted */
2405 BYTE opt /* 0:Do not mount (delayed mount), 1:Mount immediately */
2406 )
2407 {
2408 FATFS *cfs;
2409 int vol;
2410 FRESULT res;
2411 const TCHAR *rp = path;
2412
2413
2414 vol = get_ldnumber(&rp);
2415 if (vol < 0) return FR_INVALID_DRIVE;
2416 cfs = FatFs[vol]; /* Pointer to fs object */
2417
2418 if (cfs) {
2419 #if _FS_LOCK
2420 clear_lock(cfs);
2421 #endif
2422 #if _FS_REENTRANT /* Discard sync object of the current volume */
2423 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
2424 #endif
2425 cfs->fs_type = 0; /* Clear old fs object */
2426 }
2427
2428 if (fs) {
2429 fs->fs_type = 0; /* Clear new fs object */
2430 #if _FS_REENTRANT /* Create sync object for the new volume */
2431 if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
2432 #endif
2433 }
2434 FatFs[vol] = fs; /* Register new fs object */
2435
2436 if (!fs || opt != 1) return FR_OK; /* Do not mount now, it will be mounted later */
2437
2438 res = find_volume(&fs, &path, 0); /* Force mounted the volume */
2439 LEAVE_FF(fs, res);
2440 }
2441
2442
2443
2444
2445 /*-----------------------------------------------------------------------*/
2446 /* Open or Create a File */
2447 /*-----------------------------------------------------------------------*/
2448
2449 FRESULT f_open (
2450 FIL* fp, /* Pointer to the blank file object */
2451 const TCHAR* path, /* Pointer to the file name */
2452 BYTE mode /* Access mode and file open mode flags */
2453 )
2454 {
2455 FRESULT res;
2456 DIR dj;
2457 BYTE *dir;
2458 DEFINE_NAMEBUF;
2459 #if !_FS_READONLY
2460 DWORD dw, cl;
2461 #endif
2462
2463
2464 if (!fp) return FR_INVALID_OBJECT;
2465 fp->fs = 0; /* Clear file object */
2466
2467 /* Get logical drive number */
2468 #if !_FS_READONLY
2469 mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
2470 res = find_volume(&dj.fs, &path, (BYTE)(mode & ~FA_READ));
2471 #else
2472 mode &= FA_READ;
2473 res = find_volume(&dj.fs, &path, 0);
2474 #endif
2475 if (res == FR_OK) {
2476 INIT_BUF(dj);
2477 res = follow_path(&dj, path); /* Follow the file path */
2478 dir = dj.dir;
2479 #if !_FS_READONLY /* R/W configuration */
2480 if (res == FR_OK) {
2481 if (!dir) /* Default directory itself */
2482 res = FR_INVALID_NAME;
2483 #if _FS_LOCK
2484 else
2485 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2486 #endif
2487 }
2488 /* Create or Open a file */
2489 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
2490 if (res != FR_OK) { /* No file, create new */
2491 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
2492 #if _FS_LOCK
2493 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
2494 #else
2495 res = dir_register(&dj);
2496 #endif
2497 mode |= FA_CREATE_ALWAYS; /* File is created */
2498 dir = dj.dir; /* New entry */
2499 }
2500 else { /* Any object is already existing */
2501 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */
2502 res = FR_DENIED;
2503 } else {
2504 if (mode & FA_CREATE_NEW) /* Cannot create as new file */
2505 res = FR_EXIST;
2506 }
2507 }
2508 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */
2509 dw = GET_FATTIME();
2510 ST_DWORD(dir + DIR_CrtTime, dw);/* Set created time */
2511 ST_DWORD(dir + DIR_WrtTime, dw);/* Set modified time */
2512 dir[DIR_Attr] = 0; /* Reset attribute */
2513 ST_DWORD(dir + DIR_FileSize, 0);/* Reset file size */
2514 cl = ld_clust(dj.fs, dir); /* Get cluster chain */
2515 st_clust(dir, 0); /* Reset cluster */
2516 dj.fs->wflag = 1;
2517 if (cl) { /* Remove the cluster chain if exist */
2518 dw = dj.fs->winsect;
2519 res = remove_chain(dj.fs, cl);
2520 if (res == FR_OK) {
2521 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
2522 res = move_window(dj.fs, dw);
2523 }
2524 }
2525 }
2526 }
2527 else { /* Open an existing file */
2528 if (res == FR_OK) { /* Following succeeded */
2529 if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */
2530 res = FR_NO_FILE;
2531 } else {
2532 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
2533 res = FR_DENIED;
2534 }
2535 }
2536 }
2537 if (res == FR_OK) {
2538 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */
2539 mode |= FA__WRITTEN;
2540 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
2541 fp->dir_ptr = dir;
2542 #if _FS_LOCK
2543 fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2544 if (!fp->lockid) res = FR_INT_ERR;
2545 #endif
2546 }
2547
2548 #else /* R/O configuration */
2549 if (res == FR_OK) { /* Follow succeeded */
2550 dir = dj.dir;
2551 if (!dir) { /* Current directory itself */
2552 res = FR_INVALID_NAME;
2553 } else {
2554 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */
2555 res = FR_NO_FILE;
2556 }
2557 }
2558 #endif
2559 FREE_BUF();
2560
2561 if (res == FR_OK) {
2562 fp->flag = mode; /* File access mode */
2563 fp->err = 0; /* Clear error flag */
2564 fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */
2565 fp->fsize = LD_DWORD(dir + DIR_FileSize); /* File size */
2566 fp->fptr = 0; /* File pointer */
2567 fp->dsect = 0;
2568 #if _USE_FASTSEEK
2569 fp->cltbl = 0; /* Normal seek mode */
2570 #endif
2571 fp->fs = dj.fs; /* Validate file object */
2572 fp->id = fp->fs->id;
2573 }
2574 }
2575
2576 LEAVE_FF(dj.fs, res);
2577 }
2578
2579
2580
2581
2582 /*-----------------------------------------------------------------------*/
2583 /* Read File */
2584 /*-----------------------------------------------------------------------*/
2585
2586 FRESULT f_read (
2587 FIL* fp, /* Pointer to the file object */
2588 void* buff, /* Pointer to data buffer */
2589 UINT btr, /* Number of bytes to read */
2590 UINT* br /* Pointer to number of bytes read */
2591 )
2592 {
2593 FRESULT res;
2594 DWORD clst, sect, remain;
2595 UINT rcnt, cc;
2596 BYTE csect, *rbuff = (BYTE*)buff;
2597
2598
2599 *br = 0; /* Clear read byte counter */
2600
2601 res = validate(fp); /* Check validity */
2602 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2603 if (fp->err) /* Check error */
2604 LEAVE_FF(fp->fs, (FRESULT)fp->err);
2605 if (!(fp->flag & FA_READ)) /* Check access mode */
2606 LEAVE_FF(fp->fs, FR_DENIED);
2607 remain = fp->fsize - fp->fptr;
2608 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
2609
2610 for ( ; btr; /* Repeat until all data read */
2611 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
2612 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2613 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
2614 if (!csect) { /* On the cluster boundary? */
2615 if (fp->fptr == 0) { /* On the top of the file? */
2616 clst = fp->sclust; /* Follow from the origin */
2617 } else { /* Middle or end of the file */
2618 #if _USE_FASTSEEK
2619 if (fp->cltbl)
2620 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
2621 else
2622 #endif
2623 clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */
2624 }
2625 if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
2626 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2627 fp->clust = clst; /* Update current cluster */
2628 }
2629 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
2630 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2631 sect += csect;
2632 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
2633 if (cc) { /* Read maximum contiguous sectors directly */
2634 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2635 cc = fp->fs->csize - csect;
2636 if (disk_read(fp->fs->drv, rbuff, sect, cc) != RES_OK)
2637 ABORT(fp->fs, FR_DISK_ERR);
2638 #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
2639 #if _FS_TINY
2640 if (fp->fs->wflag && fp->fs->winsect - sect < cc)
2641 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
2642 #else
2643 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
2644 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
2645 #endif
2646 #endif
2647 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
2648 continue;
2649 }
2650 #if !_FS_TINY
2651 if (fp->dsect != sect) { /* Load data sector if not in cache */
2652 #if !_FS_READONLY
2653 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
2654 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2655 ABORT(fp->fs, FR_DISK_ERR);
2656 fp->flag &= ~FA__DIRTY;
2657 }
2658 #endif
2659 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */
2660 ABORT(fp->fs, FR_DISK_ERR);
2661 }
2662 #endif
2663 fp->dsect = sect;
2664 }
2665 rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
2666 if (rcnt > btr) rcnt = btr;
2667 #if _FS_TINY
2668 if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */
2669 ABORT(fp->fs, FR_DISK_ERR);
2670 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
2671 #else
2672 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
2673 #endif
2674 }
2675
2676 LEAVE_FF(fp->fs, FR_OK);
2677 }
2678
2679
2680
2681
2682 #if !_FS_READONLY
2683 /*-----------------------------------------------------------------------*/
2684 /* Write File */
2685 /*-----------------------------------------------------------------------*/
2686
2687 FRESULT f_write (
2688 FIL* fp, /* Pointer to the file object */
2689 const void *buff, /* Pointer to the data to be written */
2690 UINT btw, /* Number of bytes to write */
2691 UINT* bw /* Pointer to number of bytes written */
2692 )
2693 {
2694 FRESULT res;
2695 DWORD clst, sect;
2696 UINT wcnt, cc;
2697 const BYTE *wbuff = (const BYTE*)buff;
2698 BYTE csect;
2699
2700
2701 *bw = 0; /* Clear write byte counter */
2702
2703 res = validate(fp); /* Check validity */
2704 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2705 if (fp->err) /* Check error */
2706 LEAVE_FF(fp->fs, (FRESULT)fp->err);
2707 if (!(fp->flag & FA_WRITE)) /* Check access mode */
2708 LEAVE_FF(fp->fs, FR_DENIED);
2709 if (fp->fptr + btw < fp->fptr) btw = 0; /* File size cannot reach 4GB */
2710
2711 for ( ; btw; /* Repeat until all data written */
2712 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
2713 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2714 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
2715 if (!csect) { /* On the cluster boundary? */
2716 if (fp->fptr == 0) { /* On the top of the file? */
2717 clst = fp->sclust; /* Follow from the origin */
2718 if (clst == 0) /* When no cluster is allocated, */
2719 clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
2720 } else { /* Middle or end of the file */
2721 #if _USE_FASTSEEK
2722 if (fp->cltbl)
2723 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
2724 else
2725 #endif
2726 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */
2727 }
2728 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
2729 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
2730 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2731 fp->clust = clst; /* Update current cluster */
2732 if (fp->sclust == 0) fp->sclust = clst; /* Set start cluster if the first write */
2733 }
2734 #if _FS_TINY
2735 if (fp->fs->winsect == fp->dsect && sync_window(fp->fs)) /* Write-back sector cache */
2736 ABORT(fp->fs, FR_DISK_ERR);
2737 #else
2738 if (fp->flag & FA__DIRTY) { /* Write-back sector cache */
2739 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2740 ABORT(fp->fs, FR_DISK_ERR);
2741 fp->flag &= ~FA__DIRTY;
2742 }
2743 #endif
2744 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
2745 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2746 sect += csect;
2747 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
2748 if (cc) { /* Write maximum contiguous sectors directly */
2749 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2750 cc = fp->fs->csize - csect;
2751 if (disk_write(fp->fs->drv, wbuff, sect, cc) != RES_OK)
2752 ABORT(fp->fs, FR_DISK_ERR);
2753 #if _FS_MINIMIZE <= 2
2754 #if _FS_TINY
2755 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2756 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
2757 fp->fs->wflag = 0;
2758 }
2759 #else
2760 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2761 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
2762 fp->flag &= ~FA__DIRTY;
2763 }
2764 #endif
2765 #endif
2766 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
2767 continue;
2768 }
2769 #if _FS_TINY
2770 if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */
2771 if (sync_window(fp->fs)) ABORT(fp->fs, FR_DISK_ERR);
2772 fp->fs->winsect = sect;
2773 }
2774 #else
2775 if (fp->dsect != sect) { /* Fill sector cache with file data */
2776 if (fp->fptr < fp->fsize &&
2777 disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
2778 ABORT(fp->fs, FR_DISK_ERR);
2779 }
2780 #endif
2781 fp->dsect = sect;
2782 }
2783 wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
2784 if (wcnt > btw) wcnt = btw;
2785 #if _FS_TINY
2786 if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */
2787 ABORT(fp->fs, FR_DISK_ERR);
2788 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
2789 fp->fs->wflag = 1;
2790 #else
2791 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
2792 fp->flag |= FA__DIRTY;
2793 #endif
2794 }
2795
2796 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
2797 fp->flag |= FA__WRITTEN; /* Set file change flag */
2798
2799 LEAVE_FF(fp->fs, FR_OK);
2800 }
2801
2802
2803
2804
2805 /*-----------------------------------------------------------------------*/
2806 /* Synchronize the File */
2807 /*-----------------------------------------------------------------------*/
2808
2809 FRESULT f_sync (
2810 FIL* fp /* Pointer to the file object */
2811 )
2812 {
2813 FRESULT res;
2814 DWORD tm;
2815 BYTE *dir;
2816
2817
2818 res = validate(fp); /* Check validity of the object */
2819 if (res == FR_OK) {
2820 if (fp->flag & FA__WRITTEN) { /* Is there any change to the file? */
2821 #if !_FS_TINY
2822 if (fp->flag & FA__DIRTY) { /* Write-back cached data if needed */
2823 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2824 LEAVE_FF(fp->fs, FR_DISK_ERR);
2825 fp->flag &= ~FA__DIRTY;
2826 }
2827 #endif
2828 /* Update the directory entry */
2829 res = move_window(fp->fs, fp->dir_sect);
2830 if (res == FR_OK) {
2831 dir = fp->dir_ptr;
2832 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
2833 ST_DWORD(dir + DIR_FileSize, fp->fsize); /* Update file size */
2834 st_clust(dir, fp->sclust); /* Update start cluster */
2835 tm = GET_FATTIME(); /* Update modified time */
2836 ST_DWORD(dir + DIR_WrtTime, tm);
2837 ST_WORD(dir + DIR_LstAccDate, 0);
2838 fp->flag &= ~FA__WRITTEN;
2839 fp->fs->wflag = 1;
2840 res = sync_fs(fp->fs);
2841 }
2842 }
2843 }
2844
2845 LEAVE_FF(fp->fs, res);
2846 }
2847
2848 #endif /* !_FS_READONLY */
2849
2850
2851
2852
2853 /*-----------------------------------------------------------------------*/
2854 /* Close File */
2855 /*-----------------------------------------------------------------------*/
2856
2857 FRESULT f_close (
2858 FIL *fp /* Pointer to the file object to be closed */
2859 )
2860 {
2861 FRESULT res;
2862
2863
2864 #if !_FS_READONLY
2865 res = f_sync(fp); /* Flush cached data */
2866 if (res == FR_OK)
2867 #endif
2868 {
2869 res = validate(fp); /* Lock volume */
2870 if (res == FR_OK) {
2871 #if _FS_REENTRANT
2872 FATFS *fs = fp->fs;
2873 #endif
2874 #if _FS_LOCK
2875 res = dec_lock(fp->lockid); /* Decrement file open counter */
2876 if (res == FR_OK)
2877 #endif
2878 fp->fs = 0; /* Invalidate file object */
2879 #if _FS_REENTRANT
2880 unlock_fs(fs, FR_OK); /* Unlock volume */
2881 #endif
2882 }
2883 }
2884 return res;
2885 }
2886
2887
2888
2889
2890 /*-----------------------------------------------------------------------*/
2891 /* Change Current Directory or Current Drive, Get Current Directory */
2892 /*-----------------------------------------------------------------------*/
2893
2894 #if _FS_RPATH >= 1
2895 #if _VOLUMES >= 2
2896 FRESULT f_chdrive (
2897 const TCHAR* path /* Drive number */
2898 )
2899 {
2900 int vol;
2901
2902
2903 vol = get_ldnumber(&path);
2904 if (vol < 0) return FR_INVALID_DRIVE;
2905
2906 CurrVol = (BYTE)vol;
2907
2908 return FR_OK;
2909 }
2910 #endif
2911
2912
2913 FRESULT f_chdir (
2914 const TCHAR* path /* Pointer to the directory path */
2915 )
2916 {
2917 FRESULT res;
2918 DIR dj;
2919 DEFINE_NAMEBUF;
2920
2921
2922 /* Get logical drive number */
2923 res = find_volume(&dj.fs, &path, 0);
2924 if (res == FR_OK) {
2925 INIT_BUF(dj);
2926 res = follow_path(&dj, path); /* Follow the path */
2927 FREE_BUF();
2928 if (res == FR_OK) { /* Follow completed */
2929 if (!dj.dir) {
2930 dj.fs->cdir = dj.sclust; /* Start directory itself */
2931 } else {
2932 if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */
2933 dj.fs->cdir = ld_clust(dj.fs, dj.dir);
2934 else
2935 res = FR_NO_PATH; /* Reached but a file */
2936 }
2937 }
2938 if (res == FR_NO_FILE) res = FR_NO_PATH;
2939 }
2940
2941 LEAVE_FF(dj.fs, res);
2942 }
2943
2944
2945 #if _FS_RPATH >= 2
2946 FRESULT f_getcwd (
2947 TCHAR* buff, /* Pointer to the directory path */
2948 UINT len /* Size of path */
2949 )
2950 {
2951 FRESULT res;
2952 DIR dj;
2953 UINT i, n;
2954 DWORD ccl;
2955 TCHAR *tp;
2956 FILINFO fno;
2957 DEFINE_NAMEBUF;
2958
2959
2960 *buff = 0;
2961 /* Get logical drive number */
2962 res = find_volume(&dj.fs, (const TCHAR**)&buff, 0); /* Get current volume */
2963 if (res == FR_OK) {
2964 INIT_BUF(dj);
2965 i = len; /* Bottom of buffer (directory stack base) */
2966 dj.sclust = dj.fs->cdir; /* Start to follow upper directory from current directory */
2967 while ((ccl = dj.sclust) != 0) { /* Repeat while current directory is a sub-directory */
2968 res = dir_sdi(&dj, 1); /* Get parent directory */
2969 if (res != FR_OK) break;
2970 res = dir_read(&dj, 0);
2971 if (res != FR_OK) break;
2972 dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent directory */
2973 res = dir_sdi(&dj, 0);
2974 if (res != FR_OK) break;
2975 do { /* Find the entry links to the child directory */
2976 res = dir_read(&dj, 0);
2977 if (res != FR_OK) break;
2978 if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */
2979 res = dir_next(&dj, 0);
2980 } while (res == FR_OK);
2981 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
2982 if (res != FR_OK) break;
2983 #if _USE_LFN
2984 fno.lfname = buff;
2985 fno.lfsize = i;
2986 #endif
2987 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */
2988 tp = fno.fname;
2989 #if _USE_LFN
2990 if (*buff) tp = buff;
2991 #endif
2992 for (n = 0; tp[n]; n++) ;
2993 if (i < n + 3) {
2994 res = FR_NOT_ENOUGH_CORE; break;
2995 }
2996 while (n) buff[--i] = tp[--n];
2997 buff[--i] = '/';
2998 }
2999 tp = buff;
3000 if (res == FR_OK) {
3001 #if _VOLUMES >= 2
3002 *tp++ = '0' + CurrVol; /* Put drive number */
3003 *tp++ = ':';
3004 #endif
3005 if (i == len) { /* Root-directory */
3006 *tp++ = '/';
3007 } else { /* Sub-directroy */
3008 do /* Add stacked path str */
3009 *tp++ = buff[i++];
3010 while (i < len);
3011 }
3012 }
3013 *tp = 0;
3014 FREE_BUF();
3015 }
3016
3017 LEAVE_FF(dj.fs, res);
3018 }
3019 #endif /* _FS_RPATH >= 2 */
3020 #endif /* _FS_RPATH >= 1 */
3021
3022
3023
3024 #if _FS_MINIMIZE <= 2
3025 /*-----------------------------------------------------------------------*/
3026 /* Seek File R/W Pointer */
3027 /*-----------------------------------------------------------------------*/
3028
3029 FRESULT f_lseek (
3030 FIL* fp, /* Pointer to the file object */
3031 DWORD ofs /* File pointer from top of file */
3032 )
3033 {
3034 FRESULT res;
3035 DWORD clst, bcs, nsect, ifptr;
3036 #if _USE_FASTSEEK
3037 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
3038 #endif
3039
3040
3041 res = validate(fp); /* Check validity of the object */
3042 if (res != FR_OK) LEAVE_FF(fp->fs, res);
3043 if (fp->err) /* Check error */
3044 LEAVE_FF(fp->fs, (FRESULT)fp->err);
3045
3046 #if _USE_FASTSEEK
3047 if (fp->cltbl) { /* Fast seek */
3048 if (ofs == CREATE_LINKMAP) { /* Create CLMT */
3049 tbl = fp->cltbl;
3050 tlen = *tbl++; ulen = 2; /* Given table size and required table size */
3051 cl = fp->sclust; /* Top of the chain */
3052 if (cl) {
3053 do {
3054 /* Get a fragment */
3055 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
3056 do {
3057 pcl = cl; ncl++;
3058 cl = get_fat(fp->fs, cl);
3059 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
3060 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3061 } while (cl == pcl + 1);
3062 if (ulen <= tlen) { /* Store the length and top of the fragment */
3063 *tbl++ = ncl; *tbl++ = tcl;
3064 }
3065 } while (cl < fp->fs->n_fatent); /* Repeat until end of chain */
3066 }
3067 *fp->cltbl = ulen; /* Number of items used */
3068 if (ulen <= tlen)
3069 *tbl = 0; /* Terminate table */
3070 else
3071 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
3072
3073 } else { /* Fast seek */
3074 if (ofs > fp->fsize) /* Clip offset at the file size */
3075 ofs = fp->fsize;
3076 fp->fptr = ofs; /* Set file pointer */
3077 if (ofs) {
3078 fp->clust = clmt_clust(fp, ofs - 1);
3079 dsc = clust2sect(fp->fs, fp->clust);
3080 if (!dsc) ABORT(fp->fs, FR_INT_ERR);
3081 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
3082 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */
3083 #if !_FS_TINY
3084 #if !_FS_READONLY
3085 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
3086 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
3087 ABORT(fp->fs, FR_DISK_ERR);
3088 fp->flag &= ~FA__DIRTY;
3089 }
3090 #endif
3091 if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */
3092 ABORT(fp->fs, FR_DISK_ERR);
3093 #endif
3094 fp->dsect = dsc;
3095 }
3096 }
3097 }
3098 } else
3099 #endif
3100
3101 /* Normal Seek */
3102 {
3103 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
3104 #if !_FS_READONLY
3105 && !(fp->flag & FA_WRITE)
3106 #endif
3107 ) ofs = fp->fsize;
3108
3109 ifptr = fp->fptr;
3110 fp->fptr = nsect = 0;
3111 if (ofs) {
3112 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
3113 if (ifptr > 0 &&
3114 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
3115 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
3116 ofs -= fp->fptr;
3117 clst = fp->clust;
3118 } else { /* When seek to back cluster, */
3119 clst = fp->sclust; /* start from the first cluster */
3120 #if !_FS_READONLY
3121 if (clst == 0) { /* If no cluster chain, create a new chain */
3122 clst = create_chain(fp->fs, 0);
3123 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
3124 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3125 fp->sclust = clst;
3126 }
3127 #endif
3128 fp->clust = clst;
3129 }
3130 if (clst != 0) {
3131 while (ofs > bcs) { /* Cluster following loop */
3132 #if !_FS_READONLY
3133 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
3134 clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */
3135 if (clst == 0) { /* When disk gets full, clip file size */
3136 ofs = bcs; break;
3137 }
3138 } else
3139 #endif
3140 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
3141 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3142 if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
3143 fp->clust = clst;
3144 fp->fptr += bcs;
3145 ofs -= bcs;
3146 }
3147 fp->fptr += ofs;
3148 if (ofs % SS(fp->fs)) {
3149 nsect = clust2sect(fp->fs, clst); /* Current sector */
3150 if (!nsect) ABORT(fp->fs, FR_INT_ERR);
3151 nsect += ofs / SS(fp->fs);
3152 }
3153 }
3154 }
3155 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */
3156 #if !_FS_TINY
3157 #if !_FS_READONLY
3158 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
3159 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
3160 ABORT(fp->fs, FR_DISK_ERR);
3161 fp->flag &= ~FA__DIRTY;
3162 }
3163 #endif
3164 if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */
3165 ABORT(fp->fs, FR_DISK_ERR);
3166 #endif
3167 fp->dsect = nsect;
3168 }
3169 #if !_FS_READONLY
3170 if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */
3171 fp->fsize = fp->fptr;
3172 fp->flag |= FA__WRITTEN;
3173 }
3174 #endif
3175 }
3176
3177 LEAVE_FF(fp->fs, res);
3178 }
3179
3180
3181
3182 #if _FS_MINIMIZE <= 1
3183 /*-----------------------------------------------------------------------*/
3184 /* Create a Directory Object */
3185 /*-----------------------------------------------------------------------*/
3186
3187 FRESULT f_opendir (
3188 DIR* dp, /* Pointer to directory object to create */
3189 const TCHAR* path /* Pointer to the directory path */
3190 )
3191 {
3192 FRESULT res;
3193 FATFS* fs;
3194 DEFINE_NAMEBUF;
3195
3196
3197 if (!dp) return FR_INVALID_OBJECT;
3198
3199 /* Get logical drive number */
3200 res = find_volume(&fs, &path, 0);
3201 if (res == FR_OK) {
3202 dp->fs = fs;
3203 INIT_BUF(*dp);
3204 res = follow_path(dp, path); /* Follow the path to the directory */
3205 FREE_BUF();
3206 if (res == FR_OK) { /* Follow completed */
3207 if (dp->dir) { /* It is not the origin directory itself */
3208 if (dp->dir[DIR_Attr] & AM_DIR) /* The object is a sub directory */
3209 dp->sclust = ld_clust(fs, dp->dir);
3210 else /* The object is a file */
3211 res = FR_NO_PATH;
3212 }
3213 if (res == FR_OK) {
3214 dp->id = fs->id;
3215 res = dir_sdi(dp, 0); /* Rewind directory */
3216 #if _FS_LOCK
3217 if (res == FR_OK) {
3218 if (dp->sclust) {
3219 dp->lockid = inc_lock(dp, 0); /* Lock the sub directory */
3220 if (!dp->lockid)
3221 res = FR_TOO_MANY_OPEN_FILES;
3222 } else {
3223 dp->lockid = 0; /* Root directory need not to be locked */
3224 }
3225 }
3226 #endif
3227 }
3228 }
3229 if (res == FR_NO_FILE) res = FR_NO_PATH;
3230 }
3231 if (res != FR_OK) dp->fs = 0; /* Invalidate the directory object if function faild */
3232
3233 LEAVE_FF(fs, res);
3234 }
3235
3236
3237
3238
3239 /*-----------------------------------------------------------------------*/
3240 /* Close Directory */
3241 /*-----------------------------------------------------------------------*/
3242
3243 FRESULT f_closedir (
3244 DIR *dp /* Pointer to the directory object to be closed */
3245 )
3246 {
3247 FRESULT res;
3248
3249
3250 res = validate(dp);
3251 if (res == FR_OK) {
3252 #if _FS_REENTRANT
3253 FATFS *fs = dp->fs;
3254 #endif
3255 #if _FS_LOCK
3256 if (dp->lockid) /* Decrement sub-directory open counter */
3257 res = dec_lock(dp->lockid);
3258 if (res == FR_OK)
3259 #endif
3260 dp->fs = 0; /* Invalidate directory object */
3261 #if _FS_REENTRANT
3262 unlock_fs(fs, FR_OK); /* Unlock volume */
3263 #endif
3264 }
3265 return res;
3266 }
3267
3268
3269
3270
3271 /*-----------------------------------------------------------------------*/
3272 /* Read Directory Entries in Sequence */
3273 /*-----------------------------------------------------------------------*/
3274
3275 FRESULT f_readdir (
3276 DIR* dp, /* Pointer to the open directory object */
3277 FILINFO* fno /* Pointer to file information to return */
3278 )
3279 {
3280 FRESULT res;
3281 DEFINE_NAMEBUF;
3282
3283
3284 res = validate(dp); /* Check validity of the object */
3285 if (res == FR_OK) {
3286 if (!fno) {
3287 res = dir_sdi(dp, 0); /* Rewind the directory object */
3288 } else {
3289 INIT_BUF(*dp);
3290 res = dir_read(dp, 0); /* Read an item */
3291 if (res == FR_NO_FILE) { /* Reached end of directory */
3292 dp->sect = 0;
3293 res = FR_OK;
3294 }
3295 if (res == FR_OK) { /* A valid entry is found */
3296 get_fileinfo(dp, fno); /* Get the object information */
3297 res = dir_next(dp, 0); /* Increment index for next */
3298 if (res == FR_NO_FILE) {
3299 dp->sect = 0;
3300 res = FR_OK;
3301 }
3302 }
3303 FREE_BUF();
3304 }
3305 }
3306
3307 LEAVE_FF(dp->fs, res);
3308 }
3309
3310
3311
3312 #if _USE_FIND
3313 /*-----------------------------------------------------------------------*/
3314 /* Find next file */
3315 /*-----------------------------------------------------------------------*/
3316
3317 FRESULT f_findnext (
3318 DIR* dp, /* Pointer to the open directory object */
3319 FILINFO* fno /* Pointer to the file information structure */
3320 )
3321 {
3322 FRESULT res;
3323
3324
3325 for (;;) {
3326 res = f_readdir(dp, fno); /* Get a directory item */
3327 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */
3328 #if _USE_LFN
3329 if (fno->lfname && pattern_matching(dp->pat, fno->lfname, 0, 0)) break; /* Test for LFN if exist */
3330 #endif
3331 if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for SFN */
3332 }
3333 return res;
3334
3335 }
3336
3337
3338
3339 /*-----------------------------------------------------------------------*/
3340 /* Find first file */
3341 /*-----------------------------------------------------------------------*/
3342
3343 FRESULT f_findfirst (
3344 DIR* dp, /* Pointer to the blank directory object */
3345 FILINFO* fno, /* Pointer to the file information structure */
3346 const TCHAR* path, /* Pointer to the directory to open */
3347 const TCHAR* pattern /* Pointer to the matching pattern */
3348 )
3349 {
3350 FRESULT res;
3351
3352
3353 dp->pat = pattern; /* Save pointer to pattern string */
3354 res = f_opendir(dp, path); /* Open the target directory */
3355 if (res == FR_OK)
3356 res = f_findnext(dp, fno); /* Find the first item */
3357 return res;
3358 }
3359
3360 #endif /* _USE_FIND */
3361
3362
3363
3364 #if _FS_MINIMIZE == 0
3365 /*-----------------------------------------------------------------------*/
3366 /* Get File Status */
3367 /*-----------------------------------------------------------------------*/
3368
3369 FRESULT f_stat (
3370 const TCHAR* path, /* Pointer to the file path */
3371 FILINFO* fno /* Pointer to file information to return */
3372 )
3373 {
3374 FRESULT res;
3375 DIR dj;
3376 DEFINE_NAMEBUF;
3377
3378
3379 /* Get logical drive number */
3380 res = find_volume(&dj.fs, &path, 0);
3381 if (res == FR_OK) {
3382 INIT_BUF(dj);
3383 res = follow_path(&dj, path); /* Follow the file path */
3384 if (res == FR_OK) { /* Follow completed */
3385 if (dj.dir) { /* Found an object */
3386 if (fno) get_fileinfo(&dj, fno);
3387 } else { /* It is root directory */
3388 res = FR_INVALID_NAME;
3389 }
3390 }
3391 FREE_BUF();
3392 }
3393
3394 LEAVE_FF(dj.fs, res);
3395 }
3396
3397
3398
3399 #if !_FS_READONLY
3400 /*-----------------------------------------------------------------------*/
3401 /* Get Number of Free Clusters */
3402 /*-----------------------------------------------------------------------*/
3403
3404 FRESULT f_getfree (
3405 const TCHAR* path, /* Path name of the logical drive number */
3406 DWORD* nclst, /* Pointer to a variable to return number of free clusters */
3407 FATFS** fatfs /* Pointer to return pointer to corresponding file system object */
3408 )
3409 {
3410 FRESULT res;
3411 FATFS *fs;
3412 DWORD nfree, clst, sect, stat;
3413 UINT i;
3414 BYTE fat, *p;
3415
3416
3417 /* Get logical drive number */
3418 res = find_volume(fatfs, &path, 0);
3419 fs = *fatfs;
3420 if (res == FR_OK) {
3421 /* If free_clust is valid, return it without full cluster scan */
3422 if (fs->free_clust <= fs->n_fatent - 2) {
3423 *nclst = fs->free_clust;
3424 } else {
3425 /* Get number of free clusters */
3426 fat = fs->fs_type;
3427 nfree = 0;
3428 if (fat == FS_FAT12) { /* Sector unalighed entries: Search FAT via regular routine. */
3429 clst = 2;
3430 do {
3431 stat = get_fat(fs, clst);
3432 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
3433 if (stat == 1) { res = FR_INT_ERR; break; }
3434 if (stat == 0) nfree++;
3435 } while (++clst < fs->n_fatent);
3436 } else { /* Sector alighed entries: Accelerate the FAT search. */
3437 clst = fs->n_fatent; sect = fs->fatbase;
3438 i = 0; p = 0;
3439 do {
3440 if (!i) {
3441 res = move_window(fs, sect++);
3442 if (res != FR_OK) break;
3443 p = fs->win;
3444 i = SS(fs);
3445 }
3446 if (fat == FS_FAT16) {
3447 if (LD_WORD(p) == 0) nfree++;
3448 p += 2; i -= 2;
3449 } else {
3450 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) nfree++;
3451 p += 4; i -= 4;
3452 }
3453 } while (--clst);
3454 }
3455 fs->free_clust = nfree; /* free_clust is valid */
3456 fs->fsi_flag |= 1; /* FSInfo is to be updated */
3457 *nclst = nfree; /* Return the free clusters */
3458 }
3459 }
3460 LEAVE_FF(fs, res);
3461 }
3462
3463
3464
3465
3466 /*-----------------------------------------------------------------------*/
3467 /* Truncate File */
3468 /*-----------------------------------------------------------------------*/
3469
3470 FRESULT f_truncate (
3471 FIL* fp /* Pointer to the file object */
3472 )
3473 {
3474 FRESULT res;
3475 DWORD ncl;
3476
3477
3478 res = validate(fp); /* Check validity of the object */
3479 if (res == FR_OK) {
3480 if (fp->err) { /* Check error */
3481 res = (FRESULT)fp->err;
3482 } else {
3483 if (!(fp->flag & FA_WRITE)) /* Check access mode */
3484 res = FR_DENIED;
3485 }
3486 }
3487 if (res == FR_OK) {
3488 if (fp->fsize > fp->fptr) {
3489 fp->fsize = fp->fptr; /* Set file size to current R/W point */
3490 fp->flag |= FA__WRITTEN;
3491 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
3492 res = remove_chain(fp->fs, fp->sclust);
3493 fp->sclust = 0;
3494 } else { /* When truncate a part of the file, remove remaining clusters */
3495 ncl = get_fat(fp->fs, fp->clust);
3496 res = FR_OK;
3497 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
3498 if (ncl == 1) res = FR_INT_ERR;
3499 if (res == FR_OK && ncl < fp->fs->n_fatent) {
3500 res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF);
3501 if (res == FR_OK) res = remove_chain(fp->fs, ncl);
3502 }
3503 }
3504 #if !_FS_TINY
3505 if (res == FR_OK && (fp->flag & FA__DIRTY)) {
3506 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
3507 res = FR_DISK_ERR;
3508 else
3509 fp->flag &= ~FA__DIRTY;
3510 }
3511 #endif
3512 }
3513 if (res != FR_OK) fp->err = (FRESULT)res;
3514 }
3515
3516 LEAVE_FF(fp->fs, res);
3517 }
3518
3519
3520
3521
3522 /*-----------------------------------------------------------------------*/
3523 /* Delete a File or Directory */
3524 /*-----------------------------------------------------------------------*/
3525
3526 FRESULT f_unlink (
3527 const TCHAR* path /* Pointer to the file or directory path */
3528 )
3529 {
3530 FRESULT res;
3531 DIR dj, sdj;
3532 BYTE *dir;
3533 DWORD dclst = 0;
3534 DEFINE_NAMEBUF;
3535
3536
3537 /* Get logical drive number */
3538 res = find_volume(&dj.fs, &path, 1);
3539 if (res == FR_OK) {
3540 INIT_BUF(dj);
3541 res = follow_path(&dj, path); /* Follow the file path */
3542 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
3543 res = FR_INVALID_NAME; /* Cannot remove dot entry */
3544 #if _FS_LOCK
3545 if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open object */
3546 #endif
3547 if (res == FR_OK) { /* The object is accessible */
3548 dir = dj.dir;
3549 if (!dir) {
3550 res = FR_INVALID_NAME; /* Cannot remove the origin directory */
3551 } else {
3552 if (dir[DIR_Attr] & AM_RDO)
3553 res = FR_DENIED; /* Cannot remove R/O object */
3554 }
3555 if (res == FR_OK) {
3556 dclst = ld_clust(dj.fs, dir);
3557 if (dclst && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-directory ? */
3558 #if _FS_RPATH
3559 if (dclst == dj.fs->cdir) { /* Is it the current directory? */
3560 res = FR_DENIED;
3561 } else
3562 #endif
3563 {
3564 mem_cpy(&sdj, &dj, sizeof (DIR)); /* Open the sub-directory */
3565 sdj.sclust = dclst;
3566 res = dir_sdi(&sdj, 2);
3567 if (res == FR_OK) {
3568 res = dir_read(&sdj, 0); /* Read an item (excluding dot entries) */
3569 if (res == FR_OK) res = FR_DENIED; /* Not empty? (cannot remove) */
3570 if (res == FR_NO_FILE) res = FR_OK; /* Empty? (can remove) */
3571 }
3572 }
3573 }
3574 }
3575 if (res == FR_OK) {
3576 res = dir_remove(&dj); /* Remove the directory entry */
3577 if (res == FR_OK && dclst) /* Remove the cluster chain if exist */
3578 res = remove_chain(dj.fs, dclst);
3579 if (res == FR_OK) res = sync_fs(dj.fs);
3580 }
3581 }
3582 FREE_BUF();
3583 }
3584
3585 LEAVE_FF(dj.fs, res);
3586 }
3587
3588
3589
3590
3591 /*-----------------------------------------------------------------------*/
3592 /* Create a Directory */
3593 /*-----------------------------------------------------------------------*/
3594
3595 FRESULT f_mkdir (
3596 const TCHAR* path /* Pointer to the directory path */
3597 )
3598 {
3599 FRESULT res;
3600 DIR dj;
3601 BYTE *dir, n;
3602 DWORD dsc, dcl, pcl, tm = GET_FATTIME();
3603 DEFINE_NAMEBUF;
3604
3605
3606 /* Get logical drive number */
3607 res = find_volume(&dj.fs, &path, 1);
3608 if (res == FR_OK) {
3609 INIT_BUF(dj);
3610 res = follow_path(&dj, path); /* Follow the file path */
3611 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */
3612 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT))
3613 res = FR_INVALID_NAME;
3614 if (res == FR_NO_FILE) { /* Can create a new directory */
3615 dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */
3616 res = FR_OK;
3617 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */
3618 if (dcl == 1) res = FR_INT_ERR;
3619 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
3620 if (res == FR_OK) /* Flush FAT */
3621 res = sync_window(dj.fs);
3622 if (res == FR_OK) { /* Initialize the new directory table */
3623 dsc = clust2sect(dj.fs, dcl);
3624 dir = dj.fs->win;
3625 mem_set(dir, 0, SS(dj.fs));
3626 mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */
3627 dir[DIR_Name] = '.';
3628 dir[DIR_Attr] = AM_DIR;
3629 ST_DWORD(dir + DIR_WrtTime, tm);
3630 st_clust(dir, dcl);
3631 mem_cpy(dir + SZ_DIRE, dir, SZ_DIRE); /* Create ".." entry */
3632 dir[SZ_DIRE + 1] = '.'; pcl = dj.sclust;
3633 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
3634 pcl = 0;
3635 st_clust(dir + SZ_DIRE, pcl);
3636 for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */
3637 dj.fs->winsect = dsc++;
3638 dj.fs->wflag = 1;
3639 res = sync_window(dj.fs);
3640 if (res != FR_OK) break;
3641 mem_set(dir, 0, SS(dj.fs));
3642 }
3643 }
3644 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */
3645 if (res != FR_OK) {
3646 remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */
3647 } else {
3648 dir = dj.dir;
3649 dir[DIR_Attr] = AM_DIR; /* Attribute */
3650 ST_DWORD(dir + DIR_WrtTime, tm); /* Created time */
3651 st_clust(dir, dcl); /* Table start cluster */
3652 dj.fs->wflag = 1;
3653 res = sync_fs(dj.fs);
3654 }
3655 }
3656 FREE_BUF();
3657 }
3658
3659 LEAVE_FF(dj.fs, res);
3660 }
3661
3662
3663
3664
3665 /*-----------------------------------------------------------------------*/
3666 /* Change Attribute */
3667 /*-----------------------------------------------------------------------*/
3668
3669 FRESULT f_chmod (
3670 const TCHAR* path, /* Pointer to the file path */
3671 BYTE attr, /* Attribute bits */
3672 BYTE mask /* Attribute mask to change */
3673 )
3674 {
3675 FRESULT res;
3676 DIR dj;
3677 BYTE *dir;
3678 DEFINE_NAMEBUF;
3679
3680
3681 res = find_volume(&dj.fs, &path, 1); /* Get logical drive number */
3682 if (res == FR_OK) {
3683 INIT_BUF(dj);
3684 res = follow_path(&dj, path); /* Follow the file path */
3685 FREE_BUF();
3686 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
3687 res = FR_INVALID_NAME;
3688 if (res == FR_OK) {
3689 dir = dj.dir;
3690 if (!dir) { /* Is it a root directory? */
3691 res = FR_INVALID_NAME;
3692 } else { /* File or sub directory */
3693 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
3694 dir[DIR_Attr] = (attr & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
3695 dj.fs->wflag = 1;
3696 res = sync_fs(dj.fs);
3697 }
3698 }
3699 }
3700
3701 LEAVE_FF(dj.fs, res);
3702 }
3703
3704
3705
3706
3707 /*-----------------------------------------------------------------------*/
3708 /* Rename File/Directory */
3709 /*-----------------------------------------------------------------------*/
3710
3711 FRESULT f_rename (
3712 const TCHAR* path_old, /* Pointer to the object to be renamed */
3713 const TCHAR* path_new /* Pointer to the new name */
3714 )
3715 {
3716 FRESULT res;
3717 DIR djo, djn;
3718 BYTE buf[21], *dir;
3719 DWORD dw;
3720 DEFINE_NAMEBUF;
3721
3722
3723 /* Get logical drive number of the source object */
3724 res = find_volume(&djo.fs, &path_old, 1);
3725 if (res == FR_OK) {
3726 djn.fs = djo.fs;
3727 INIT_BUF(djo);
3728 res = follow_path(&djo, path_old); /* Check old object */
3729 if (_FS_RPATH && res == FR_OK && (djo.fn[NSFLAG] & NS_DOT))
3730 res = FR_INVALID_NAME;
3731 #if _FS_LOCK
3732 if (res == FR_OK) res = chk_lock(&djo, 2);
3733 #endif
3734 if (res == FR_OK) { /* Old object is found */
3735 if (!djo.dir) { /* Is root dir? */
3736 res = FR_NO_FILE;
3737 } else {
3738 mem_cpy(buf, djo.dir + DIR_Attr, 21); /* Save information about object except name */
3739 mem_cpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */
3740 if (get_ldnumber(&path_new) >= 0) /* Snip drive number off and ignore it */
3741 res = follow_path(&djn, path_new); /* and make sure if new object name is not conflicting */
3742 else
3743 res = FR_INVALID_DRIVE;
3744 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
3745 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
3746 res = dir_register(&djn); /* Register the new entry */
3747 if (res == FR_OK) {
3748 /* Start of critical section where any interruption can cause a cross-link */
3749 dir = djn.dir; /* Copy information about object except name */
3750 mem_cpy(dir + 13, buf + 2, 19);
3751 dir[DIR_Attr] = buf[0] | AM_ARC;
3752 djo.fs->wflag = 1;
3753 if ((dir[DIR_Attr] & AM_DIR) && djo.sclust != djn.sclust) { /* Update .. entry in the sub-directory if needed */
3754 dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
3755 if (!dw) {
3756 res = FR_INT_ERR;
3757 } else {
3758 res = move_window(djo.fs, dw);
3759 dir = djo.fs->win + SZ_DIRE * 1; /* Ptr to .. entry */
3760 if (res == FR_OK && dir[1] == '.') {
3761 st_clust(dir, djn.sclust);
3762 djo.fs->wflag = 1;
3763 }
3764 }
3765 }
3766 if (res == FR_OK) {
3767 res = dir_remove(&djo); /* Remove old entry */
3768 if (res == FR_OK)
3769 res = sync_fs(djo.fs);
3770 }
3771 /* End of critical section */
3772 }
3773 }
3774 }
3775 }
3776 FREE_BUF();
3777 }
3778
3779 LEAVE_FF(djo.fs, res);
3780 }
3781
3782
3783
3784
3785 /*-----------------------------------------------------------------------*/
3786 /* Change Timestamp */
3787 /*-----------------------------------------------------------------------*/
3788
3789 FRESULT f_utime (
3790 const TCHAR* path, /* Pointer to the file/directory name */
3791 const FILINFO* fno /* Pointer to the time stamp to be set */
3792 )
3793 {
3794 FRESULT res;
3795 DIR dj;
3796 BYTE *dir;
3797 DEFINE_NAMEBUF;
3798
3799
3800 /* Get logical drive number */
3801 res = find_volume(&dj.fs, &path, 1);
3802 if (res == FR_OK) {
3803 INIT_BUF(dj);
3804 res = follow_path(&dj, path); /* Follow the file path */
3805 FREE_BUF();
3806 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
3807 res = FR_INVALID_NAME;
3808 if (res == FR_OK) {
3809 dir = dj.dir;
3810 if (!dir) { /* Root directory */
3811 res = FR_INVALID_NAME;
3812 } else { /* File or sub-directory */
3813 ST_WORD(dir + DIR_WrtTime, fno->ftime);
3814 ST_WORD(dir + DIR_WrtDate, fno->fdate);
3815 dj.fs->wflag = 1;
3816 res = sync_fs(dj.fs);
3817 }
3818 }
3819 }
3820
3821 LEAVE_FF(dj.fs, res);
3822 }
3823
3824 #endif /* !_FS_READONLY */
3825 #endif /* _FS_MINIMIZE == 0 */
3826 #endif /* _FS_MINIMIZE <= 1 */
3827 #endif /* _FS_MINIMIZE <= 2 */
3828
3829
3830
3831
3832 #if _USE_LABEL
3833 /*-----------------------------------------------------------------------*/
3834 /* Get volume label */
3835 /*-----------------------------------------------------------------------*/
3836
3837 FRESULT f_getlabel (
3838 const TCHAR* path, /* Path name of the logical drive number */
3839 TCHAR* label, /* Pointer to a buffer to return the volume label */
3840 DWORD* vsn /* Pointer to a variable to return the volume serial number */
3841 )
3842 {
3843 FRESULT res;
3844 DIR dj;
3845 UINT i, j;
3846 #if _USE_LFN && _LFN_UNICODE
3847 WCHAR w;
3848 #endif
3849
3850
3851 /* Get logical drive number */
3852 res = find_volume(&dj.fs, &path, 0);
3853
3854 /* Get volume label */
3855 if (res == FR_OK && label) {
3856 dj.sclust = 0; /* Open root directory */
3857 res = dir_sdi(&dj, 0);
3858 if (res == FR_OK) {
3859 res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
3860 if (res == FR_OK) { /* A volume label is exist */
3861 #if _USE_LFN && _LFN_UNICODE
3862 i = j = 0;
3863 do {
3864 w = (i < 11) ? dj.dir[i++] : ' ';
3865 if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i]))
3866 w = w << 8 | dj.dir[i++];
3867 label[j++] = ff_convert(w, 1); /* OEM -> Unicode */
3868 } while (j < 11);
3869 #else
3870 mem_cpy(label, dj.dir, 11);
3871 #endif
3872 j = 11;
3873 do {
3874 label[j] = 0;
3875 if (!j) break;
3876 } while (label[--j] == ' ');
3877 }
3878 if (res == FR_NO_FILE) { /* No label, return nul string */
3879 label[0] = 0;
3880 res = FR_OK;
3881 }
3882 }
3883 }
3884
3885 /* Get volume serial number */
3886 if (res == FR_OK && vsn) {
3887 res = move_window(dj.fs, dj.fs->volbase);
3888 if (res == FR_OK) {
3889 i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID;
3890 *vsn = LD_DWORD(&dj.fs->win[i]);
3891 }
3892 }
3893
3894 LEAVE_FF(dj.fs, res);
3895 }
3896
3897
3898
3899 #if !_FS_READONLY
3900 /*-----------------------------------------------------------------------*/
3901 /* Set volume label */
3902 /*-----------------------------------------------------------------------*/
3903
3904 FRESULT f_setlabel (
3905 const TCHAR* label /* Pointer to the volume label to set */
3906 )
3907 {
3908 FRESULT res;
3909 DIR dj;
3910 BYTE vn[11];
3911 UINT i, j, sl;
3912 WCHAR w;
3913 DWORD tm;
3914
3915
3916 /* Get logical drive number */
3917 res = find_volume(&dj.fs, &label, 1);
3918 if (res) LEAVE_FF(dj.fs, res);
3919
3920 /* Create a volume label in directory form */
3921 vn[0] = 0;
3922 for (sl = 0; label[sl]; sl++) ; /* Get name length */
3923 for ( ; sl && label[sl - 1] == ' '; sl--) ; /* Remove trailing spaces */
3924 if (sl) { /* Create volume label in directory form */
3925 i = j = 0;
3926 do {
3927 #if _USE_LFN && _LFN_UNICODE
3928 w = ff_convert(ff_wtoupper(label[i++]), 0);
3929 #else
3930 w = (BYTE)label[i++];
3931 if (IsDBCS1(w))
3932 w = (j < 10 && i < sl && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;
3933 #if _USE_LFN
3934 w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0);
3935 #else
3936 if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */
3937 #ifdef _EXCVT
3938 if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */
3939 #else
3940 if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */
3941 #endif
3942 #endif
3943 #endif
3944 if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid characters for volume label */
3945 LEAVE_FF(dj.fs, FR_INVALID_NAME);
3946 if (w >= 0x100) vn[j++] = (BYTE)(w >> 8);
3947 vn[j++] = (BYTE)w;
3948 } while (i < sl);
3949 while (j < 11) vn[j++] = ' '; /* Fill remaining name field */
3950 if (vn[0] == DDEM) LEAVE_FF(dj.fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */
3951 }
3952
3953 /* Set volume label */
3954 dj.sclust = 0; /* Open root directory */
3955 res = dir_sdi(&dj, 0);
3956 if (res == FR_OK) {
3957 res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
3958 if (res == FR_OK) { /* A volume label is found */
3959 if (vn[0]) {
3960 mem_cpy(dj.dir, vn, 11); /* Change the volume label name */
3961 tm = GET_FATTIME();
3962 ST_DWORD(dj.dir + DIR_WrtTime, tm);
3963 } else {
3964 dj.dir[0] = DDEM; /* Remove the volume label */
3965 }
3966 dj.fs->wflag = 1;
3967 res = sync_fs(dj.fs);
3968 } else { /* No volume label is found or error */
3969 if (res == FR_NO_FILE) {
3970 res = FR_OK;
3971 if (vn[0]) { /* Create volume label as new */
3972 res = dir_alloc(&dj, 1); /* Allocate an entry for volume label */
3973 if (res == FR_OK) {
3974 mem_set(dj.dir, 0, SZ_DIRE); /* Set volume label */
3975 mem_cpy(dj.dir, vn, 11);
3976 dj.dir[DIR_Attr] = AM_VOL;
3977 tm = GET_FATTIME();
3978 ST_DWORD(dj.dir + DIR_WrtTime, tm);
3979 dj.fs->wflag = 1;
3980 res = sync_fs(dj.fs);
3981 }
3982 }
3983 }
3984 }
3985 }
3986
3987 LEAVE_FF(dj.fs, res);
3988 }
3989
3990 #endif /* !_FS_READONLY */
3991 #endif /* _USE_LABEL */
3992
3993
3994
3995 /*-----------------------------------------------------------------------*/
3996 /* Forward data to the stream directly (available on only tiny cfg) */
3997 /*-----------------------------------------------------------------------*/
3998 #if _USE_FORWARD && _FS_TINY
3999
4000 FRESULT f_forward (
4001 FIL* fp, /* Pointer to the file object */
4002 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
4003 UINT btf, /* Number of bytes to forward */
4004 UINT* bf /* Pointer to number of bytes forwarded */
4005 )
4006 {
4007 FRESULT res;
4008 DWORD remain, clst, sect;
4009 UINT rcnt;
4010 BYTE csect;
4011
4012
4013 *bf = 0; /* Clear transfer byte counter */
4014
4015 res = validate(fp); /* Check validity of the object */
4016 if (res != FR_OK) LEAVE_FF(fp->fs, res);
4017 if (fp->err) /* Check error */
4018 LEAVE_FF(fp->fs, (FRESULT)fp->err);
4019 if (!(fp->flag & FA_READ)) /* Check access mode */
4020 LEAVE_FF(fp->fs, FR_DENIED);
4021
4022 remain = fp->fsize - fp->fptr;
4023 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
4024
4025 for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */
4026 fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
4027 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
4028 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
4029 if (!csect) { /* On the cluster boundary? */
4030 clst = (fp->fptr == 0) ? /* On the top of the file? */
4031 fp->sclust : get_fat(fp->fs, fp->clust);
4032 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
4033 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
4034 fp->clust = clst; /* Update current cluster */
4035 }
4036 }
4037 sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */
4038 if (!sect) ABORT(fp->fs, FR_INT_ERR);
4039 sect += csect;
4040 if (move_window(fp->fs, sect) != FR_OK) /* Move sector window */
4041 ABORT(fp->fs, FR_DISK_ERR);
4042 fp->dsect = sect;
4043 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
4044 if (rcnt > btf) rcnt = btf;
4045 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
4046 if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
4047 }
4048
4049 LEAVE_FF(fp->fs, FR_OK);
4050 }
4051 #endif /* _USE_FORWARD */
4052
4053
4054
4055 #if _USE_MKFS && !_FS_READONLY
4056 /*-----------------------------------------------------------------------*/
4057 /* Create file system on the logical drive */
4058 /*-----------------------------------------------------------------------*/
4059 #define N_ROOTDIR12 224 /* Number of root directory entries for FAT12/16 */
4060 #define N_ROOTDIR16 512 /* Number of root directory entries for FAT12/16 */
4061 #define N_FATS 1 /* Number of FATs (1 or 2) */
4062
4063
4064 FRESULT f_mkfs (
4065 const TCHAR* path, /* Logical drive number */
4066 BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */
4067 UINT au /* Size of allocation unit in unit of byte or sector */
4068 )
4069 {
4070 static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0};
4071 static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
4072 int vol;
4073 BYTE fmt, md, sys, *tbl, pdrv, part;
4074 DWORD n_clst, vs, n, wsect;
4075 UINT i;
4076 DWORD b_vol, b_fat, b_dir, b_data; /* LBA */
4077 DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */
4078 FATFS *fs;
4079 DSTATUS stat;
4080 #if _USE_TRIM
4081 DWORD eb[2];
4082 #endif
4083
4084
4085 /* Check mounted drive and clear work area */
4086 if (sfd > 1) return FR_INVALID_PARAMETER;
4087 vol = get_ldnumber(&path);
4088 if (vol < 0) return FR_INVALID_DRIVE;
4089 fs = FatFs[vol];
4090 if (!fs) return FR_NOT_ENABLED;
4091 fs->fs_type = 0;
4092 pdrv = LD2PD(vol); /* Physical drive */
4093 part = LD2PT(vol); /* Partition (0:auto detect, 1-4:get from partition table)*/
4094
4095 /* Get disk statics */
4096 stat = disk_initialize(pdrv);
4097 if (stat & STA_NOINIT) return FR_NOT_READY;
4098 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
4099 #if _MAX_SS != _MIN_SS /* Get disk sector size */
4100 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS || SS(fs) < _MIN_SS)
4101 return FR_DISK_ERR;
4102 #endif
4103 if (_MULTI_PARTITION && part) {
4104 /* Get partition information from partition table in the MBR */
4105 if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
4106 if (LD_WORD(fs->win + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
4107 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
4108 if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */
4109 b_vol = LD_DWORD(tbl + 8); /* Volume start sector */
4110 n_vol = LD_DWORD(tbl + 12); /* Volume size */
4111 } else {
4112 /* Create a partition in this function */
4113 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128)
4114 return FR_DISK_ERR;
4115 b_vol = (sfd) ? 0 : 63; /* Volume start sector */
4116 n_vol -= b_vol; /* Volume size */
4117 }
4118
4119 if (au & (au - 1)) au = 0;
4120 if (!au) { /* AU auto selection */
4121 vs = n_vol / (2000 / (SS(fs) / 512));
4122 for (i = 0; vs < vst[i]; i++) ;
4123 au = cst[i];
4124 }
4125 if (au >= _MIN_SS) au /= SS(fs); /* Number of sectors per cluster */
4126 if (!au) au = 1;
4127 if (au > 128) au = 128;
4128
4129 /* Pre-compute number of clusters and FAT sub-type */
4130 n_clst = n_vol / au;
4131 fmt = FS_FAT12;
4132 if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
4133 if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
4134
4135 /* Determine offset and size of FAT structure */
4136 if (fmt == FS_FAT32) {
4137 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
4138 n_rsv = 32;
4139 n_dir = 0;
4140 } else {
4141 n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
4142 n_fat = (n_fat + SS(fs) - 1) / SS(fs);
4143 n_rsv = 1;
4144 if(fmt == FS_FAT12)
4145 n_dir = (DWORD)N_ROOTDIR12 * SZ_DIRE / SS(fs);
4146 else
4147 n_dir = (DWORD)N_ROOTDIR16 * SZ_DIRE / SS(fs);
4148 }
4149 b_fat = b_vol + n_rsv; /* FAT area start sector */
4150 b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */
4151 b_data = b_dir + n_dir; /* Data area start sector */
4152 if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */
4153
4154 /* Align data start sector to erase block boundary (for flash memory media) */
4155 if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1;
4156 n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */
4157 n = (n - b_data) / N_FATS;
4158 if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */
4159 n_rsv += n;
4160 b_fat += n;
4161 } else { /* FAT12/16: Expand FAT size */
4162 n_fat += n;
4163 }
4164
4165 /* Determine number of clusters and final check of validity of the FAT sub-type */
4166 n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
4167 if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16)
4168 || (fmt == FS_FAT32 && n_clst < MIN_FAT32))
4169 return FR_MKFS_ABORTED;
4170
4171 /* Determine system ID in the partition table */
4172 if (fmt == FS_FAT32) {
4173 sys = 0x0C; /* FAT32X */
4174 } else {
4175 if (fmt == FS_FAT12 && n_vol < 0x10000) {
4176 sys = 0x01; /* FAT12(<65536) */
4177 } else {
4178 sys = (n_vol < 0x10000) ? 0x04 : 0x06; /* FAT16(<65536) : FAT12/16(>=65536) */
4179 }
4180 }
4181
4182 if (_MULTI_PARTITION && part) {
4183 /* Update system ID in the partition table */
4184 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
4185 tbl[4] = sys;
4186 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to teh MBR */
4187 return FR_DISK_ERR;
4188 md = 0xF8;
4189 } else {
4190 if (sfd) { /* No partition table (SFD) */
4191 md = 0xF0;
4192 } else { /* Create partition table (FDISK) */
4193 mem_set(fs->win, 0, SS(fs));
4194 tbl = fs->win + MBR_Table; /* Create partition table for single partition in the drive */
4195 tbl[1] = 1; /* Partition start head */
4196 tbl[2] = 1; /* Partition start sector */
4197 tbl[3] = 0; /* Partition start cylinder */
4198 tbl[4] = sys; /* System type */
4199 tbl[5] = 254; /* Partition end head */
4200 n = (b_vol + n_vol) / 63 / 255;
4201 tbl[6] = (BYTE)(n >> 2 | 63); /* Partition end sector */
4202 tbl[7] = (BYTE)n; /* End cylinder */
4203 ST_DWORD(tbl + 8, 63); /* Partition start in LBA */
4204 ST_DWORD(tbl + 12, n_vol); /* Partition size in LBA */
4205 ST_WORD(fs->win + BS_55AA, 0xAA55); /* MBR signature */
4206 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR */
4207 return FR_DISK_ERR;
4208 md = 0xF8;
4209 }
4210 }
4211
4212 /* Create BPB in the VBR */
4213 tbl = fs->win; /* Clear sector */
4214 mem_set(tbl, 0, SS(fs));
4215 mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
4216 i = SS(fs); /* Sector size */
4217 ST_WORD(tbl + BPB_BytsPerSec, i);
4218 tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */
4219 ST_WORD(tbl + BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
4220 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
4221 i = (fmt == FS_FAT32) ? 0 : (fmt == FS_FAT12 ? N_ROOTDIR12 : N_ROOTDIR16); /* Number of root directory entries */
4222 ST_WORD(tbl + BPB_RootEntCnt, i);
4223 if (n_vol < 0x10000) { /* Number of total sectors */
4224 ST_WORD(tbl + BPB_TotSec16, n_vol);
4225 } else {
4226 ST_DWORD(tbl + BPB_TotSec32, n_vol);
4227 }
4228 tbl[BPB_Media] = md; /* Media descriptor */
4229 ST_DWORD(tbl + BPB_HiddSec, b_vol); /* Hidden sectors */
4230 n = GET_FATTIME(); /* Use current time as VSN */
4231 if (fmt == FS_FAT12) {
4232 /* Assume floppy characteristics */
4233 ST_WORD(tbl + BPB_SecPerTrk, 0x12); /* Number of sectors per track */
4234 ST_WORD(tbl + BPB_NumHeads, 0x02); /* Number of heads */
4235 ST_DWORD(tbl + BS_VolID, n); /* VSN */
4236 ST_WORD(tbl + BPB_FATSz16, n_fat); /* Number of sectors per FAT */
4237 tbl[BS_DrvNum] = 0x00; /* Drive number */
4238 tbl[BS_BootSig] = 0x29; /* Extended boot signature */
4239 mem_cpy(tbl + BS_VolLab, "NO NAME " "FAT12 ", 19); /* Volume label, FAT signature */
4240 } else if (fmt == FS_FAT32) {
4241 ST_WORD(tbl + BPB_SecPerTrk, 63); /* Number of sectors per track */
4242 ST_WORD(tbl + BPB_NumHeads, 255); /* Number of heads */
4243 ST_DWORD(tbl + BS_VolID32, n); /* VSN */
4244 ST_DWORD(tbl + BPB_FATSz32, n_fat); /* Number of sectors per FAT */
4245 ST_DWORD(tbl + BPB_RootClus, 2); /* Root directory start cluster (2) */
4246 ST_WORD(tbl + BPB_FSInfo, 1); /* FSINFO record offset (VBR + 1) */
4247 ST_WORD(tbl + BPB_BkBootSec, 6); /* Backup boot record offset (VBR + 6) */
4248 tbl[BS_DrvNum32] = 0x80; /* Drive number */
4249 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
4250 mem_cpy(tbl + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
4251 } else {
4252 ST_WORD(tbl + BPB_SecPerTrk, 63); /* Number of sectors per track */
4253 ST_WORD(tbl + BPB_NumHeads, 255); /* Number of heads */
4254 ST_DWORD(tbl + BS_VolID, n); /* VSN */
4255 ST_WORD(tbl + BPB_FATSz16, n_fat); /* Number of sectors per FAT */
4256 tbl[BS_DrvNum] = 0x80; /* Drive number */
4257 tbl[BS_BootSig] = 0x29; /* Extended boot signature */
4258 mem_cpy(tbl + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
4259 }
4260 ST_WORD(tbl + BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */
4261 if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */
4262 return FR_DISK_ERR;
4263 if (fmt == FS_FAT32) /* Write it to the backup VBR if needed (VBR + 6) */
4264 disk_write(pdrv, tbl, b_vol + 6, 1);
4265
4266 /* Initialize FAT area */
4267 wsect = b_fat;
4268 for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */
4269 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
4270 n = md; /* Media descriptor byte */
4271 if (fmt != FS_FAT32) {
4272 n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
4273 ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT12/16) */
4274 } else {
4275 n |= 0xFFFFFF00;
4276 ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT32) */
4277 ST_DWORD(tbl + 4, 0xFFFFFFFF);
4278 ST_DWORD(tbl + 8, 0x0FFFFFFF); /* Reserve cluster #2 for root directory */
4279 }
4280 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
4281 return FR_DISK_ERR;
4282 mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */
4283 for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */
4284 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
4285 return FR_DISK_ERR;
4286 }
4287 }
4288
4289 /* Initialize root directory */
4290 i = (fmt == FS_FAT32) ? au : (UINT)n_dir;
4291 do {
4292 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
4293 return FR_DISK_ERR;
4294 } while (--i);
4295
4296 #if _USE_TRIM /* Erase data area if needed */
4297 {
4298 eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1;
4299 disk_ioctl(pdrv, CTRL_TRIM, eb);
4300 }
4301 #endif
4302
4303 /* Create FSINFO if needed */
4304 if (fmt == FS_FAT32) {
4305 ST_DWORD(tbl + FSI_LeadSig, 0x41615252);
4306 ST_DWORD(tbl + FSI_StrucSig, 0x61417272);
4307 ST_DWORD(tbl + FSI_Free_Count, n_clst - 1); /* Number of free clusters */
4308 ST_DWORD(tbl + FSI_Nxt_Free, 2); /* Last allocated cluster# */
4309 ST_WORD(tbl + BS_55AA, 0xAA55);
4310 disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR + 1) */
4311 disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR + 7) */
4312 }
4313
4314 return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR;
4315 }
4316
4317
4318
4319 #if _MULTI_PARTITION
4320 /*-----------------------------------------------------------------------*/
4321 /* Create partition table on the physical drive */
4322 /*-----------------------------------------------------------------------*/
4323
4324 FRESULT f_fdisk (
4325 BYTE pdrv, /* Physical drive number */
4326 const DWORD szt[], /* Pointer to the size table for each partitions */
4327 void* work /* Pointer to the working buffer */
4328 )
4329 {
4330 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
4331 BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
4332 DSTATUS stat;
4333 DWORD sz_disk, sz_part, s_part;
4334
4335
4336 stat = disk_initialize(pdrv);
4337 if (stat & STA_NOINIT) return FR_NOT_READY;
4338 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
4339 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
4340
4341 /* Determine CHS in the table regardless of the drive geometry */
4342 for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
4343 if (n == 256) n--;
4344 e_hd = n - 1;
4345 sz_cyl = 63 * n;
4346 tot_cyl = sz_disk / sz_cyl;
4347
4348 /* Create partition table */
4349 mem_set(buf, 0, _MAX_SS);
4350 p = buf + MBR_Table; b_cyl = 0;
4351 for (i = 0; i < 4; i++, p += SZ_PTE) {
4352 p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;
4353 if (!p_cyl) continue;
4354 s_part = (DWORD)sz_cyl * b_cyl;
4355 sz_part = (DWORD)sz_cyl * p_cyl;
4356 if (i == 0) { /* Exclude first track of cylinder 0 */
4357 s_hd = 1;
4358 s_part += 63; sz_part -= 63;
4359 } else {
4360 s_hd = 0;
4361 }
4362 e_cyl = b_cyl + p_cyl - 1;
4363 if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
4364
4365 /* Set partition table */
4366 p[1] = s_hd; /* Start head */
4367 p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */
4368 p[3] = (BYTE)b_cyl; /* Start cylinder */
4369 p[4] = 0x06; /* System type (temporary setting) */
4370 p[5] = e_hd; /* End head */
4371 p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */
4372 p[7] = (BYTE)e_cyl; /* End cylinder */
4373 ST_DWORD(p + 8, s_part); /* Start sector in LBA */
4374 ST_DWORD(p + 12, sz_part); /* Partition size */
4375
4376 /* Next partition */
4377 b_cyl += p_cyl;
4378 }
4379 ST_WORD(p, 0xAA55);
4380
4381 /* Write it to the MBR */
4382 return (disk_write(pdrv, buf, 0, 1) != RES_OK || disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK;
4383 }
4384
4385
4386 #endif /* _MULTI_PARTITION */
4387 #endif /* _USE_MKFS && !_FS_READONLY */
4388
4389
4390
4391
4392 #if _USE_STRFUNC
4393 /*-----------------------------------------------------------------------*/
4394 /* Get a string from the file */
4395 /*-----------------------------------------------------------------------*/
4396
4397 TCHAR* f_gets (
4398 TCHAR* buff, /* Pointer to the string buffer to read */
4399 int len, /* Size of string buffer (characters) */
4400 FIL* fp /* Pointer to the file object */
4401 )
4402 {
4403 int n = 0;
4404 TCHAR c, *p = buff;
4405 BYTE s[2];
4406 UINT rc;
4407
4408
4409 while (n < len - 1) { /* Read characters until buffer gets filled */
4410 #if _USE_LFN && _LFN_UNICODE
4411 #if _STRF_ENCODE == 3 /* Read a character in UTF-8 */
4412 f_read(fp, s, 1, &rc);
4413 if (rc != 1) break;
4414 c = s[0];
4415 if (c >= 0x80) {
4416 if (c < 0xC0) continue; /* Skip stray trailer */
4417 if (c < 0xE0) { /* Two-byte sequence */
4418 f_read(fp, s, 1, &rc);
4419 if (rc != 1) break;
4420 c = (c & 0x1F) << 6 | (s[0] & 0x3F);
4421 if (c < 0x80) c = '?';
4422 } else {
4423 if (c < 0xF0) { /* Three-byte sequence */
4424 f_read(fp, s, 2, &rc);
4425 if (rc != 2) break;
4426 c = c << 12 | (s[0] & 0x3F) << 6 | (s[1] & 0x3F);
4427 if (c < 0x800) c = '?';
4428 } else { /* Reject four-byte sequence */
4429 c = '?';
4430 }
4431 }
4432 }
4433 #elif _STRF_ENCODE == 2 /* Read a character in UTF-16BE */
4434 f_read(fp, s, 2, &rc);
4435 if (rc != 2) break;
4436 c = s[1] + (s[0] << 8);
4437 #elif _STRF_ENCODE == 1 /* Read a character in UTF-16LE */
4438 f_read(fp, s, 2, &rc);
4439 if (rc != 2) break;
4440 c = s[0] + (s[1] << 8);
4441 #else /* Read a character in ANSI/OEM */
4442 f_read(fp, s, 1, &rc);
4443 if (rc != 1) break;
4444 c = s[0];
4445 if (IsDBCS1(c)) {
4446 f_read(fp, s, 1, &rc);
4447 if (rc != 1) break;
4448 c = (c << 8) + s[0];
4449 }
4450 c = ff_convert(c, 1); /* OEM -> Unicode */
4451 if (!c) c = '?';
4452 #endif
4453 #else /* Read a character without conversion */
4454 f_read(fp, s, 1, &rc);
4455 if (rc != 1) break;
4456 c = s[0];
4457 #endif
4458 if (_USE_STRFUNC == 2 && c == '\r') continue; /* Strip '\r' */
4459 *p++ = c;
4460 n++;
4461 if (c == '\n') break; /* Break on EOL */
4462 }
4463 *p = 0;
4464 return n ? buff : 0; /* When no data read (eof or error), return with error. */
4465 }
4466
4467
4468
4469
4470 #if !_FS_READONLY
4471 #include <stdarg.h>
4472 /*-----------------------------------------------------------------------*/
4473 /* Put a character to the file */
4474 /*-----------------------------------------------------------------------*/
4475
4476 typedef struct {
4477 FIL* fp;
4478 int idx, nchr;
4479 BYTE buf[64];
4480 } putbuff;
4481
4482
4483 static
4484 void putc_bfd (
4485 putbuff* pb,
4486 TCHAR c
4487 )
4488 {
4489 UINT bw;
4490 int i;
4491
4492
4493 if (_USE_STRFUNC == 2 && c == '\n') /* LF -> CRLF conversion */
4494 putc_bfd(pb, '\r');
4495
4496 i = pb->idx; /* Buffer write index (-1:error) */
4497 if (i < 0) return;
4498
4499 #if _USE_LFN && _LFN_UNICODE
4500 #if _STRF_ENCODE == 3 /* Write a character in UTF-8 */
4501 if (c < 0x80) { /* 7-bit */
4502 pb->buf[i++] = (BYTE)c;
4503 } else {
4504 if (c < 0x800) { /* 11-bit */
4505 pb->buf[i++] = (BYTE)(0xC0 | c >> 6);
4506 } else { /* 16-bit */
4507 pb->buf[i++] = (BYTE)(0xE0 | c >> 12);
4508 pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F));
4509 }
4510 pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F));
4511 }
4512 #elif _STRF_ENCODE == 2 /* Write a character in UTF-16BE */
4513 pb->buf[i++] = (BYTE)(c >> 8);
4514 pb->buf[i++] = (BYTE)c;
4515 #elif _STRF_ENCODE == 1 /* Write a character in UTF-16LE */
4516 pb->buf[i++] = (BYTE)c;
4517 pb->buf[i++] = (BYTE)(c >> 8);
4518 #else /* Write a character in ANSI/OEM */
4519 c = ff_convert(c, 0); /* Unicode -> OEM */
4520 if (!c) c = '?';
4521 if (c >= 0x100)
4522 pb->buf[i++] = (BYTE)(c >> 8);
4523 pb->buf[i++] = (BYTE)c;
4524 #endif
4525 #else /* Write a character without conversion */
4526 pb->buf[i++] = (BYTE)c;
4527 #endif
4528
4529 if (i >= (int)(sizeof pb->buf) - 3) { /* Write buffered characters to the file */
4530 f_write(pb->fp, pb->buf, (UINT)i, &bw);
4531 i = (bw == (UINT)i) ? 0 : -1;
4532 }
4533 pb->idx = i;
4534 pb->nchr++;
4535 }
4536
4537
4538
4539 int f_putc (
4540 TCHAR c, /* A character to be output */
4541 FIL* fp /* Pointer to the file object */
4542 )
4543 {
4544 putbuff pb;
4545 UINT nw;
4546
4547
4548 pb.fp = fp; /* Initialize output buffer */
4549 pb.nchr = pb.idx = 0;
4550
4551 putc_bfd(&pb, c); /* Put a character */
4552
4553 if ( pb.idx >= 0 /* Flush buffered characters to the file */
4554 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
4555 && (UINT)pb.idx == nw) return pb.nchr;
4556 return EOF;
4557 }
4558
4559
4560
4561
4562 /*-----------------------------------------------------------------------*/
4563 /* Put a string to the file */
4564 /*-----------------------------------------------------------------------*/
4565
4566 int f_puts (
4567 const TCHAR* str, /* Pointer to the string to be output */
4568 FIL* fp /* Pointer to the file object */
4569 )
4570 {
4571 putbuff pb;
4572 UINT nw;
4573
4574
4575 pb.fp = fp; /* Initialize output buffer */
4576 pb.nchr = pb.idx = 0;
4577
4578 while (*str) /* Put the string */
4579 putc_bfd(&pb, *str++);
4580
4581 if ( pb.idx >= 0 /* Flush buffered characters to the file */
4582 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
4583 && (UINT)pb.idx == nw) return pb.nchr;
4584 return EOF;
4585 }
4586
4587
4588
4589
4590 /*-----------------------------------------------------------------------*/
4591 /* Put a formatted string to the file */
4592 /*-----------------------------------------------------------------------*/
4593
4594 int f_printf (
4595 FIL* fp, /* Pointer to the file object */
4596 const TCHAR* fmt, /* Pointer to the format string */
4597 ... /* Optional arguments... */
4598 )
4599 {
4600 va_list arp;
4601 BYTE f, r;
4602 UINT nw, i, j, w;
4603 DWORD v;
4604 TCHAR c, d, s[16], *p;
4605 putbuff pb;
4606
4607
4608 pb.fp = fp; /* Initialize output buffer */
4609 pb.nchr = pb.idx = 0;
4610
4611 va_start(arp, fmt);
4612
4613 for (;;) {
4614 c = *fmt++;
4615 if (c == 0) break; /* End of string */
4616 if (c != '%') { /* Non escape character */
4617 putc_bfd(&pb, c);
4618 continue;
4619 }
4620 w = f = 0;
4621 c = *fmt++;
4622 if (c == '0') { /* Flag: '0' padding */
4623 f = 1; c = *fmt++;
4624 } else {
4625 if (c == '-') { /* Flag: left justified */
4626 f = 2; c = *fmt++;
4627 }
4628 }
4629 while (IsDigit(c)) { /* Precision */
4630 w = w * 10 + c - '0';
4631 c = *fmt++;
4632 }
4633 if (c == 'l' || c == 'L') { /* Prefix: Size is long int */
4634 f |= 4; c = *fmt++;
4635 }
4636 if (!c) break;
4637 d = c;
4638 if (IsLower(d)) d -= 0x20;
4639 switch (d) { /* Type is... */
4640 case 'S' : /* String */
4641 p = va_arg(arp, TCHAR*);
4642 for (j = 0; p[j]; j++) ;
4643 if (!(f & 2)) {
4644 while (j++ < w) putc_bfd(&pb, ' ');
4645 }
4646 while (*p) putc_bfd(&pb, *p++);
4647 while (j++ < w) putc_bfd(&pb, ' ');
4648 continue;
4649 case 'C' : /* Character */
4650 putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue;
4651 case 'B' : /* Binary */
4652 r = 2; break;
4653 case 'O' : /* Octal */
4654 r = 8; break;
4655 case 'D' : /* Signed decimal */
4656 case 'U' : /* Unsigned decimal */
4657 r = 10; break;
4658 case 'X' : /* Hexdecimal */
4659 r = 16; break;
4660 default: /* Unknown type (pass-through) */
4661 putc_bfd(&pb, c); continue;
4662 }
4663
4664 /* Get an argument and put it in numeral */
4665 v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int));
4666 if (d == 'D' && (v & 0x80000000)) {
4667 v = 0 - v;
4668 f |= 8;
4669 }
4670 i = 0;
4671 do {
4672 d = (TCHAR)(v % r); v /= r;
4673 if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
4674 s[i++] = d + '0';
4675 } while (v && i < sizeof s / sizeof s[0]);
4676 if (f & 8) s[i++] = '-';
4677 j = i; d = (f & 1) ? '0' : ' ';
4678 while (!(f & 2) && j++ < w) putc_bfd(&pb, d);
4679 do putc_bfd(&pb, s[--i]); while (i);
4680 while (j++ < w) putc_bfd(&pb, d);
4681 }
4682
4683 va_end(arp);
4684
4685 if ( pb.idx >= 0 /* Flush buffered characters to the file */
4686 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
4687 && (UINT)pb.idx == nw) return pb.nchr;
4688 return EOF;
4689 }
4690
4691 #endif /* !_FS_READONLY */
4692 #endif /* _USE_STRFUNC */
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