ReactOS  0.4.14-dev-297-g23e575c
ff.c
Go to the documentation of this file.
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_CrtTime, tm);
3630  ST_DWORD(dir + DIR_WrtTime, tm);
3631  st_clust(dir, dcl);
3632  mem_cpy(dir + SZ_DIRE, dir, SZ_DIRE); /* Create ".." entry */
3633  dir[SZ_DIRE + 1] = '.'; pcl = dj.sclust;
3634  if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
3635  pcl = 0;
3636  st_clust(dir + SZ_DIRE, pcl);
3637  for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */
3638  dj.fs->winsect = dsc++;
3639  dj.fs->wflag = 1;
3640  res = sync_window(dj.fs);
3641  if (res != FR_OK) break;
3642  mem_set(dir, 0, SS(dj.fs));
3643  }
3644  }
3645  if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */
3646  if (res != FR_OK) {
3647  remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */
3648  } else {
3649  dir = dj.dir;
3650  dir[DIR_Attr] = AM_DIR; /* Attribute */
3651  ST_DWORD(dir + DIR_CrtTime, tm); /* Created time */
3652  ST_DWORD(dir + DIR_WrtTime, tm); /* Modified time */
3653  st_clust(dir, dcl); /* Table start cluster */
3654  dj.fs->wflag = 1;
3655  res = sync_fs(dj.fs);
3656  }
3657  }
3658  FREE_BUF();
3659  }
3660 
3661  LEAVE_FF(dj.fs, res);
3662 }
3663 
3664 
3665 
3666 
3667 /*-----------------------------------------------------------------------*/
3668 /* Change Attribute */
3669 /*-----------------------------------------------------------------------*/
3670 
3671 FRESULT f_chmod (
3672  const TCHAR* path, /* Pointer to the file path */
3673  BYTE attr, /* Attribute bits */
3674  BYTE mask /* Attribute mask to change */
3675 )
3676 {
3677  FRESULT res;
3678  DIR dj;
3679  BYTE *dir;
3680  DEFINE_NAMEBUF;
3681 
3682 
3683  res = find_volume(&dj.fs, &path, 1); /* Get logical drive number */
3684  if (res == FR_OK) {
3685  INIT_BUF(dj);
3686  res = follow_path(&dj, path); /* Follow the file path */
3687  FREE_BUF();
3688  if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
3689  res = FR_INVALID_NAME;
3690  if (res == FR_OK) {
3691  dir = dj.dir;
3692  if (!dir) { /* Is it a root directory? */
3693  res = FR_INVALID_NAME;
3694  } else { /* File or sub directory */
3695  mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
3696  dir[DIR_Attr] = (attr & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
3697  dj.fs->wflag = 1;
3698  res = sync_fs(dj.fs);
3699  }
3700  }
3701  }
3702 
3703  LEAVE_FF(dj.fs, res);
3704 }
3705 
3706 
3707 
3708 
3709 /*-----------------------------------------------------------------------*/
3710 /* Rename File/Directory */
3711 /*-----------------------------------------------------------------------*/
3712 
3713 FRESULT f_rename (
3714  const TCHAR* path_old, /* Pointer to the object to be renamed */
3715  const TCHAR* path_new /* Pointer to the new name */
3716 )
3717 {
3718  FRESULT res;
3719  DIR djo, djn;
3720  BYTE buf[21], *dir;
3721  DWORD dw;
3722  DEFINE_NAMEBUF;
3723 
3724 
3725  /* Get logical drive number of the source object */
3726  res = find_volume(&djo.fs, &path_old, 1);
3727  if (res == FR_OK) {
3728  djn.fs = djo.fs;
3729  INIT_BUF(djo);
3730  res = follow_path(&djo, path_old); /* Check old object */
3731  if (_FS_RPATH && res == FR_OK && (djo.fn[NSFLAG] & NS_DOT))
3732  res = FR_INVALID_NAME;
3733 #if _FS_LOCK
3734  if (res == FR_OK) res = chk_lock(&djo, 2);
3735 #endif
3736  if (res == FR_OK) { /* Old object is found */
3737  if (!djo.dir) { /* Is root dir? */
3738  res = FR_NO_FILE;
3739  } else {
3740  mem_cpy(buf, djo.dir + DIR_Attr, 21); /* Save information about object except name */
3741  mem_cpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */
3742  if (get_ldnumber(&path_new) >= 0) /* Snip drive number off and ignore it */
3743  res = follow_path(&djn, path_new); /* and make sure if new object name is not conflicting */
3744  else
3745  res = FR_INVALID_DRIVE;
3746  if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
3747  if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
3748  res = dir_register(&djn); /* Register the new entry */
3749  if (res == FR_OK) {
3750 /* Start of critical section where any interruption can cause a cross-link */
3751  dir = djn.dir; /* Copy information about object except name */
3752  mem_cpy(dir + 13, buf + 2, 19);
3753  dir[DIR_Attr] = buf[0] | AM_ARC;
3754  djo.fs->wflag = 1;
3755  if ((dir[DIR_Attr] & AM_DIR) && djo.sclust != djn.sclust) { /* Update .. entry in the sub-directory if needed */
3756  dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
3757  if (!dw) {
3758  res = FR_INT_ERR;
3759  } else {
3760  res = move_window(djo.fs, dw);
3761  dir = djo.fs->win + SZ_DIRE * 1; /* Ptr to .. entry */
3762  if (res == FR_OK && dir[1] == '.') {
3763  st_clust(dir, djn.sclust);
3764  djo.fs->wflag = 1;
3765  }
3766  }
3767  }
3768  if (res == FR_OK) {
3769  res = dir_remove(&djo); /* Remove old entry */
3770  if (res == FR_OK)
3771  res = sync_fs(djo.fs);
3772  }
3773 /* End of critical section */
3774  }
3775  }
3776  }
3777  }
3778  FREE_BUF();
3779  }
3780 
3781  LEAVE_FF(djo.fs, res);
3782 }
3783 
3784 
3785 
3786 
3787 /*-----------------------------------------------------------------------*/
3788 /* Change Timestamp */
3789 /*-----------------------------------------------------------------------*/
3790 
3791 FRESULT f_utime (
3792  const TCHAR* path, /* Pointer to the file/directory name */
3793  const FILINFO* fno /* Pointer to the time stamp to be set */
3794 )
3795 {
3796  FRESULT res;
3797  DIR dj;
3798  BYTE *dir;
3799  DEFINE_NAMEBUF;
3800 
3801 
3802  /* Get logical drive number */
3803  res = find_volume(&dj.fs, &path, 1);
3804  if (res == FR_OK) {
3805  INIT_BUF(dj);
3806  res = follow_path(&dj, path); /* Follow the file path */
3807  FREE_BUF();
3808  if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
3809  res = FR_INVALID_NAME;
3810  if (res == FR_OK) {
3811  dir = dj.dir;
3812  if (!dir) { /* Root directory */
3813  res = FR_INVALID_NAME;
3814  } else { /* File or sub-directory */
3815  ST_WORD(dir + DIR_WrtTime, fno->ftime);
3816  ST_WORD(dir + DIR_WrtDate, fno->fdate);
3817  dj.fs->wflag = 1;
3818  res = sync_fs(dj.fs);
3819  }
3820  }
3821  }
3822 
3823  LEAVE_FF(dj.fs, res);
3824 }
3825 
3826 #endif /* !_FS_READONLY */
3827 #endif /* _FS_MINIMIZE == 0 */
3828 #endif /* _FS_MINIMIZE <= 1 */
3829 #endif /* _FS_MINIMIZE <= 2 */
3830 
3831 
3832 
3833 
3834 #if _USE_LABEL
3835 /*-----------------------------------------------------------------------*/
3836 /* Get volume label */
3837 /*-----------------------------------------------------------------------*/
3838 
3839 FRESULT f_getlabel (
3840  const TCHAR* path, /* Path name of the logical drive number */
3841  TCHAR* label, /* Pointer to a buffer to return the volume label */
3842  DWORD* vsn /* Pointer to a variable to return the volume serial number */
3843 )
3844 {
3845  FRESULT res;
3846  DIR dj;
3847  UINT i, j;
3848 #if _USE_LFN && _LFN_UNICODE
3849  WCHAR w;
3850 #endif
3851 
3852 
3853  /* Get logical drive number */
3854  res = find_volume(&dj.fs, &path, 0);
3855 
3856  /* Get volume label */
3857  if (res == FR_OK && label) {
3858  dj.sclust = 0; /* Open root directory */
3859  res = dir_sdi(&dj, 0);
3860  if (res == FR_OK) {
3861  res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
3862  if (res == FR_OK) { /* A volume label is exist */
3863 #if _USE_LFN && _LFN_UNICODE
3864  i = j = 0;
3865  do {
3866  w = (i < 11) ? dj.dir[i++] : ' ';
3867  if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i]))
3868  w = w << 8 | dj.dir[i++];
3869  label[j++] = ff_convert(w, 1); /* OEM -> Unicode */
3870  } while (j < 11);
3871 #else
3872  mem_cpy(label, dj.dir, 11);
3873 #endif
3874  j = 11;
3875  do {
3876  label[j] = 0;
3877  if (!j) break;
3878  } while (label[--j] == ' ');
3879  }
3880  if (res == FR_NO_FILE) { /* No label, return nul string */
3881  label[0] = 0;
3882  res = FR_OK;
3883  }
3884  }
3885  }
3886 
3887  /* Get volume serial number */
3888  if (res == FR_OK && vsn) {
3889  res = move_window(dj.fs, dj.fs->volbase);
3890  if (res == FR_OK) {
3891  i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID;
3892  *vsn = LD_DWORD(&dj.fs->win[i]);
3893  }
3894  }
3895 
3896  LEAVE_FF(dj.fs, res);
3897 }
3898 
3899 
3900 
3901 #if !_FS_READONLY
3902 /*-----------------------------------------------------------------------*/
3903 /* Set volume label */
3904 /*-----------------------------------------------------------------------*/
3905 
3906 FRESULT f_setlabel (
3907  const TCHAR* label /* Pointer to the volume label to set */
3908 )
3909 {
3910  FRESULT res;
3911  DIR dj;
3912  BYTE vn[11];
3913  UINT i, j, sl;
3914  WCHAR w;
3915  DWORD tm;
3916 
3917 
3918  /* Get logical drive number */
3919  res = find_volume(&dj.fs, &label, 1);
3920  if (res) LEAVE_FF(dj.fs, res);
3921 
3922  /* Create a volume label in directory form */
3923  vn[0] = 0;
3924  for (sl = 0; label[sl]; sl++) ; /* Get name length */
3925  for ( ; sl && label[sl - 1] == ' '; sl--) ; /* Remove trailing spaces */
3926  if (sl) { /* Create volume label in directory form */
3927  i = j = 0;
3928  do {
3929 #if _USE_LFN && _LFN_UNICODE
3930  w = ff_convert(ff_wtoupper(label[i++]), 0);
3931 #else
3932  w = (BYTE)label[i++];
3933  if (IsDBCS1(w))
3934  w = (j < 10 && i < sl && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;
3935 #if _USE_LFN
3936  w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0);
3937 #else
3938  if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */
3939 #ifdef _EXCVT
3940  if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */
3941 #else
3942  if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */
3943 #endif
3944 #endif
3945 #endif
3946  if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid characters for volume label */
3947  LEAVE_FF(dj.fs, FR_INVALID_NAME);
3948  if (w >= 0x100) vn[j++] = (BYTE)(w >> 8);
3949  vn[j++] = (BYTE)w;
3950  } while (i < sl);
3951  while (j < 11) vn[j++] = ' '; /* Fill remaining name field */
3952  if (vn[0] == DDEM) LEAVE_FF(dj.fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */
3953  }
3954 
3955  /* Set volume label */
3956  dj.sclust = 0; /* Open root directory */
3957  res = dir_sdi(&dj, 0);
3958  if (res == FR_OK) {
3959  res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
3960  if (res == FR_OK) { /* A volume label is found */
3961  if (vn[0]) {
3962  mem_cpy(dj.dir, vn, 11); /* Change the volume label name */
3963  tm = GET_FATTIME();
3964  ST_DWORD(dj.dir + DIR_CrtTime, tm);
3965  ST_DWORD(dj.dir + DIR_WrtTime, tm);
3966  } else {
3967  dj.dir[0] = DDEM; /* Remove the volume label */
3968  }
3969  dj.fs->wflag = 1;
3970  res = sync_fs(dj.fs);
3971  } else { /* No volume label is found or error */
3972  if (res == FR_NO_FILE) {
3973  res = FR_OK;
3974  if (vn[0]) { /* Create volume label as new */
3975  res = dir_alloc(&dj, 1); /* Allocate an entry for volume label */
3976  if (res == FR_OK) {
3977  mem_set(dj.dir, 0, SZ_DIRE); /* Set volume label */
3978  mem_cpy(dj.dir, vn, 11);
3979  dj.dir[DIR_Attr] = AM_VOL;
3980  tm = GET_FATTIME();
3981  ST_DWORD(dj.dir + DIR_CrtTime, tm);
3982  ST_DWORD(dj.dir + DIR_WrtTime, tm);
3983  dj.fs->wflag = 1;
3984  res = sync_fs(dj.fs);
3985  }
3986  }
3987  }
3988  }
3989  }
3990 
3991  LEAVE_FF(dj.fs, res);
3992 }
3993 
3994 #endif /* !_FS_READONLY */
3995 #endif /* _USE_LABEL */
3996 
3997 
3998 
3999 /*-----------------------------------------------------------------------*/
4000 /* Forward data to the stream directly (available on only tiny cfg) */
4001 /*-----------------------------------------------------------------------*/
4002 #if _USE_FORWARD && _FS_TINY
4003 
4004 FRESULT f_forward (
4005  FIL* fp, /* Pointer to the file object */
4006  UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
4007  UINT btf, /* Number of bytes to forward */
4008  UINT* bf /* Pointer to number of bytes forwarded */
4009 )
4010 {
4011  FRESULT res;
4012  DWORD remain, clst, sect;
4013  UINT rcnt;
4014  BYTE csect;
4015 
4016 
4017  *bf = 0; /* Clear transfer byte counter */
4018 
4019  res = validate(fp); /* Check validity of the object */
4020  if (res != FR_OK) LEAVE_FF(fp->fs, res);
4021  if (fp->err) /* Check error */
4022  LEAVE_FF(fp->fs, (FRESULT)fp->err);
4023  if (!(fp->flag & FA_READ)) /* Check access mode */
4024  LEAVE_FF(fp->fs, FR_DENIED);
4025 
4026  remain = fp->fsize - fp->fptr;
4027  if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
4028 
4029  for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */
4030  fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
4031  csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
4032  if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
4033  if (!csect) { /* On the cluster boundary? */
4034  clst = (fp->fptr == 0) ? /* On the top of the file? */
4035  fp->sclust : get_fat(fp->fs, fp->clust);
4036  if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
4037  if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
4038  fp->clust = clst; /* Update current cluster */
4039  }
4040  }
4041  sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */
4042  if (!sect) ABORT(fp->fs, FR_INT_ERR);
4043  sect += csect;
4044  if (move_window(fp->fs, sect) != FR_OK) /* Move sector window */
4045  ABORT(fp->fs, FR_DISK_ERR);
4046  fp->dsect = sect;
4047  rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
4048  if (rcnt > btf) rcnt = btf;
4049  rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
4050  if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
4051  }
4052 
4053  LEAVE_FF(fp->fs, FR_OK);
4054 }
4055 #endif /* _USE_FORWARD */
4056 
4057 
4058 
4059 #if _USE_MKFS && !_FS_READONLY
4060 /*-----------------------------------------------------------------------*/
4061 /* Create file system on the logical drive */
4062 /*-----------------------------------------------------------------------*/
4063 #define N_ROOTDIR12 224 /* Number of root directory entries for FAT12 */
4064 #define N_ROOTDIR16 512 /* Number of root directory entries for FAT16 */
4065 #define N_FATS 2 /* Number of FATs (1 or 2) */
4066 
4067 
4068 FRESULT f_mkfs (
4069  const TCHAR* path, /* Logical drive number */
4070  BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */
4071  UINT au /* Size of allocation unit in unit of byte or sector */
4072 )
4073 {
4074  static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0};
4075  static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
4076  int vol;
4077  BYTE fmt, md, sys, *tbl, pdrv, part;
4078  DWORD n_clst, vs, n, wsect;
4079  UINT i;
4080  DWORD b_vol, b_fat, b_dir, b_data; /* LBA */
4081  DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */
4082  FATFS *fs;
4083  DSTATUS stat;
4084 #if _USE_TRIM
4085  DWORD eb[2];
4086 #endif
4087 
4088 
4089  /* Check mounted drive and clear work area */
4090  if (sfd > 1) return FR_INVALID_PARAMETER;
4091  vol = get_ldnumber(&path);
4092  if (vol < 0) return FR_INVALID_DRIVE;
4093  fs = FatFs[vol];
4094  if (!fs) return FR_NOT_ENABLED;
4095  fs->fs_type = 0;
4096  pdrv = LD2PD(vol); /* Physical drive */
4097  part = LD2PT(vol); /* Partition (0:auto detect, 1-4:get from partition table)*/
4098 
4099  /* Get disk statics */
4100  stat = disk_initialize(pdrv);
4101  if (stat & STA_NOINIT) return FR_NOT_READY;
4102  if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
4103 #if _MAX_SS != _MIN_SS /* Get disk sector size */
4104  if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > _MAX_SS || SS(fs) < _MIN_SS)
4105  return FR_DISK_ERR;
4106 #endif
4107  if (_MULTI_PARTITION && part) {
4108  /* Get partition information from partition table in the MBR */
4109  if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
4110  if (LD_WORD(fs->win + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
4111  tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
4112  if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */
4113  b_vol = LD_DWORD(tbl + 8); /* Volume start sector */
4114  n_vol = LD_DWORD(tbl + 12); /* Volume size */
4115  } else {
4116  /* Create a partition in this function */
4117  if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128)
4118  return FR_DISK_ERR;
4119  b_vol = (sfd) ? 0 : 63; /* Volume start sector */
4120  n_vol -= b_vol; /* Volume size */
4121  }
4122 
4123  if (au & (au - 1)) au = 0;
4124  if (!au) { /* AU auto selection */
4125  vs = n_vol / (2000 / (SS(fs) / 512));
4126  for (i = 0; vs < vst[i]; i++) ;
4127  au = cst[i];
4128  }
4129  if (au >= _MIN_SS) au /= SS(fs); /* Number of sectors per cluster */
4130  if (!au) au = 1;
4131  if (au > 128) au = 128;
4132 
4133  /* Pre-compute number of clusters and FAT sub-type */
4134  n_clst = n_vol / au;
4135  fmt = FS_FAT12;
4136  if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
4137  if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
4138 
4139  /* Determine offset and size of FAT structure */
4140  if (fmt == FS_FAT32) {
4141  n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
4142  n_rsv = 32;
4143  n_dir = 0;
4144  } else {
4145  n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
4146  n_fat = (n_fat + SS(fs) - 1) / SS(fs);
4147  n_rsv = 1;
4148  if (fmt == FS_FAT12)
4149  n_dir = (DWORD)N_ROOTDIR12 * SZ_DIRE / SS(fs);
4150  else
4151  n_dir = (DWORD)N_ROOTDIR16 * SZ_DIRE / SS(fs);
4152  }
4153  b_fat = b_vol + n_rsv; /* FAT area start sector */
4154  b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */
4155  b_data = b_dir + n_dir; /* Data area start sector */
4156  if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */
4157 
4158  /* Align data start sector to erase block boundary (for flash memory media) */
4159  if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1;
4160  n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */
4161  n = (n - b_data) / N_FATS;
4162  if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */
4163  n_rsv += n;
4164  b_fat += n;
4165  } else if (fmt == FS_FAT16) { /* FAT16: Expand FAT size */
4166  n_fat += n;
4167  } // else /* if (fmt == FS_FAT12) */ {} /* FAT12: Do nothing */
4168 
4169  /* Determine number of clusters and final check of validity of the FAT sub-type */
4170  n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
4171  if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16)
4172  || (fmt == FS_FAT32 && n_clst < MIN_FAT32))
4173  return FR_MKFS_ABORTED;
4174 
4175  /* Determine system ID in the partition table */
4176  if (fmt == FS_FAT32) {
4177  sys = 0x0C; /* FAT32X */
4178  } else {
4179  if (fmt == FS_FAT12 && n_vol < 0x10000) {
4180  sys = 0x01; /* FAT12(<65536) */
4181  } else {
4182  sys = (n_vol < 0x10000) ? 0x04 : 0x06; /* FAT16(<65536) : FAT12/16(>=65536) */
4183  }
4184  }
4185 
4186  if (_MULTI_PARTITION && part) {
4187  /* Update system ID in the partition table */
4188  tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
4189  tbl[4] = sys;
4190  if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to teh MBR */
4191  return FR_DISK_ERR;
4192  md = 0xF8;
4193  } else {
4194  if (sfd) { /* No partition table (SFD) */
4195  md = 0xF0;
4196  } else { /* Create partition table (FDISK) */
4197  mem_set(fs->win, 0, SS(fs));
4198  tbl = fs->win + MBR_Table; /* Create partition table for single partition in the drive */
4199  tbl[1] = 1; /* Partition start head */
4200  tbl[2] = 1; /* Partition start sector */
4201  tbl[3] = 0; /* Partition start cylinder */
4202  tbl[4] = sys; /* System type */
4203  tbl[5] = 254; /* Partition end head */
4204  n = (b_vol + n_vol) / 63 / 255;
4205  tbl[6] = (BYTE)(n >> 2 | 63); /* Partition end sector */
4206  tbl[7] = (BYTE)n; /* End cylinder */
4207  ST_DWORD(tbl + 8, 63); /* Partition start in LBA */
4208  ST_DWORD(tbl + 12, n_vol); /* Partition size in LBA */
4209  ST_WORD(fs->win + BS_55AA, 0xAA55); /* MBR signature */
4210  if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR */
4211  return FR_DISK_ERR;
4212  md = 0xF8;
4213  }
4214  }
4215 
4216  /* Create BPB in the VBR */
4217  tbl = fs->win; /* Clear sector */
4218  mem_set(tbl, 0, SS(fs));
4219  mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
4220  i = SS(fs); /* Sector size */
4221  ST_WORD(tbl + BPB_BytsPerSec, i);
4222  tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */
4223  ST_WORD(tbl + BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
4224  tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
4225  i = (fmt == FS_FAT32) ? 0 : (fmt == FS_FAT12 ? N_ROOTDIR12 : N_ROOTDIR16); /* Number of root directory entries */
4226  ST_WORD(tbl + BPB_RootEntCnt, i);
4227  if (n_vol < 0x10000) { /* Number of total sectors */
4228  ST_WORD(tbl + BPB_TotSec16, n_vol);
4229  } else {
4230  ST_DWORD(tbl + BPB_TotSec32, n_vol);
4231  }
4232  tbl[BPB_Media] = md; /* Media descriptor */
4233  ST_DWORD(tbl + BPB_HiddSec, b_vol); /* Hidden sectors */
4234  n = GET_FATTIME(); /* Use current time as VSN */
4235  if (fmt == FS_FAT32) {
4236  ST_WORD(tbl + BPB_SecPerTrk, 63); /* Number of sectors per track */
4237  ST_WORD(tbl + BPB_NumHeads, 255); /* Number of heads */
4238  ST_DWORD(tbl + BS_VolID32, n); /* VSN */
4239  ST_DWORD(tbl + BPB_FATSz32, n_fat); /* Number of sectors per FAT */
4240  ST_DWORD(tbl + BPB_RootClus, 2); /* Root directory start cluster (2) */
4241  ST_WORD(tbl + BPB_FSInfo, 1); /* FSINFO record offset (VBR + 1) */
4242  ST_WORD(tbl + BPB_BkBootSec, 6); /* Backup boot record offset (VBR + 6) */
4243  tbl[BS_DrvNum32] = 0x80; /* Drive number */
4244  tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
4245  mem_cpy(tbl + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
4246  } else if (fmt == FS_FAT16) {
4247  ST_WORD(tbl + BPB_SecPerTrk, 63); /* Number of sectors per track */
4248  ST_WORD(tbl + BPB_NumHeads, 255); /* Number of heads */
4249  ST_DWORD(tbl + BS_VolID, n); /* VSN */
4250  ST_WORD(tbl + BPB_FATSz16, n_fat); /* Number of sectors per FAT */
4251  tbl[BS_DrvNum] = 0x80; /* Drive number */
4252  tbl[BS_BootSig] = 0x29; /* Extended boot signature */
4253  mem_cpy(tbl + BS_VolLab, "NO NAME " "FAT16 ", 19); /* Volume label, FAT signature */
4254  } else /* if (fmt == FS_FAT12) */ {
4255  /* Assume floppy characteristics */
4256  ST_WORD(tbl + BPB_SecPerTrk, 0x12); /* Number of sectors per track */
4257  ST_WORD(tbl + BPB_NumHeads, 0x02); /* Number of heads */
4258  ST_DWORD(tbl + BS_VolID, n); /* VSN */
4259  ST_WORD(tbl + BPB_FATSz16, n_fat); /* Number of sectors per FAT */
4260  tbl[BS_DrvNum] = 0x00; /* Drive number */
4261  tbl[BS_BootSig] = 0x29; /* Extended boot signature */
4262  mem_cpy(tbl + BS_VolLab, "NO NAME " "FAT12 ", 19); /* Volume label, FAT signature */
4263  }
4264  ST_WORD(tbl + BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */
4265  if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */
4266  return FR_DISK_ERR;
4267  if (fmt == FS_FAT32) /* Write it to the backup VBR if needed (VBR + 6) */
4268  disk_write(pdrv, tbl, b_vol + 6, 1);
4269 
4270  /* Initialize FAT area */
4271  wsect = b_fat;
4272  for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */
4273  mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
4274  n = md; /* Media descriptor byte */
4275  if (fmt != FS_FAT32) {
4276  n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
4277  ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT12/16) */
4278  } else {
4279  n |= 0xFFFFFF00;
4280  ST_DWORD(tbl + 0,