Contiki-NG
ff.c
1 /*----------------------------------------------------------------------------/
2 / FatFs - Generic FAT file system module R0.12b /
3 /-----------------------------------------------------------------------------/
4 /
5 / Copyright (C) 2016, ChaN, all right reserved.
6 /
7 / FatFs module is an open source software. Redistribution and use of FatFs in
8 / source and binary forms, with or without modification, are permitted provided
9 / that the following condition is met:
10 
11 / 1. Redistributions of source code must retain the above copyright notice,
12 / this condition and the following disclaimer.
13 /
14 / This software is provided by the copyright holder and contributors "AS IS"
15 / and any warranties related to this software are DISCLAIMED.
16 / The copyright owner or contributors be NOT LIABLE for any damages caused
17 / by use of this software.
18 /----------------------------------------------------------------------------*/
19 
20 
21 #include "ff.h" /* Declarations of FatFs API */
22 #include "diskio.h" /* Declarations of device I/O functions */
23 
24 
25 /*--------------------------------------------------------------------------
26 
27  Module Private Definitions
28 
29 ---------------------------------------------------------------------------*/
30 
31 #if _FATFS != 68020 /* Revision ID */
32 #error Wrong include file (ff.h).
33 #endif
34 
35 
36 #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
37 
38 
39 /* Reentrancy related */
40 #if _FS_REENTRANT
41 #if _USE_LFN == 1
42 #error Static LFN work area cannot be used at thread-safe configuration
43 #endif
44 #define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
45 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
46 #else
47 #define ENTER_FF(fs)
48 #define LEAVE_FF(fs, res) return res
49 #endif
50 
51 
52 
53 /* Definitions of sector size */
54 #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)
55 #error Wrong sector size configuration
56 #endif
57 #if _MAX_SS == _MIN_SS
58 #define SS(fs) ((UINT)_MAX_SS) /* Fixed sector size */
59 #else
60 #define SS(fs) ((fs)->ssize) /* Variable sector size */
61 #endif
62 
63 
64 /* Timestamp */
65 #if _FS_NORTC == 1
66 #if _NORTC_YEAR < 1980 || _NORTC_YEAR > 2107 || _NORTC_MON < 1 || _NORTC_MON > 12 || _NORTC_MDAY < 1 || _NORTC_MDAY > 31
67 #error Invalid _FS_NORTC settings
68 #endif
69 #define GET_FATTIME() ((DWORD)(_NORTC_YEAR - 1980) << 25 | (DWORD)_NORTC_MON << 21 | (DWORD)_NORTC_MDAY << 16)
70 #else
71 #define GET_FATTIME() get_fattime()
72 #endif
73 
74 
75 /* File lock controls */
76 #if _FS_LOCK != 0
77 #if _FS_READONLY
78 #error _FS_LOCK must be 0 at read-only configuration
79 #endif
80 typedef struct {
81  FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */
82  DWORD clu; /* Object ID 2, directory (0:root) */
83  DWORD ofs; /* Object ID 3, directory offset */
84  WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
85 } FILESEM;
86 #endif
87 
88 
89 
90 /* DBCS code ranges and SBCS upper conversion tables */
91 
92 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */
93 #define _DF1S 0x81 /* DBC 1st byte range 1 start */
94 #define _DF1E 0x9F /* DBC 1st byte range 1 end */
95 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */
96 #define _DF2E 0xFC /* DBC 1st byte range 2 end */
97 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */
98 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */
99 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */
100 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */
101 
102 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
103 #define _DF1S 0x81
104 #define _DF1E 0xFE
105 #define _DS1S 0x40
106 #define _DS1E 0x7E
107 #define _DS2S 0x80
108 #define _DS2E 0xFE
109 
110 #elif _CODE_PAGE == 949 /* Korean */
111 #define _DF1S 0x81
112 #define _DF1E 0xFE
113 #define _DS1S 0x41
114 #define _DS1E 0x5A
115 #define _DS2S 0x61
116 #define _DS2E 0x7A
117 #define _DS3S 0x81
118 #define _DS3E 0xFE
119 
120 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
121 #define _DF1S 0x81
122 #define _DF1E 0xFE
123 #define _DS1S 0x40
124 #define _DS1E 0x7E
125 #define _DS2S 0xA1
126 #define _DS2E 0xFE
127 
128 #elif _CODE_PAGE == 437 /* U.S. */
129 #define _DF1S 0
130 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
131  0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
132  0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
133  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
134  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
135  0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
136  0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
137  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
138 
139 #elif _CODE_PAGE == 720 /* Arabic */
140 #define _DF1S 0
141 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
142  0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
143  0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
144  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
145  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
146  0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
147  0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
148  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
149 
150 #elif _CODE_PAGE == 737 /* Greek */
151 #define _DF1S 0
152 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
153  0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
154  0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \
155  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
156  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
157  0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
158  0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
159  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
160 
161 #elif _CODE_PAGE == 771 /* KBL */
162 #define _DF1S 0
163 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
164  0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
165  0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
166  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
167  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
168  0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \
169  0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
170  0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
171 
172 #elif _CODE_PAGE == 775 /* Baltic */
173 #define _DF1S 0
174 #define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \
175  0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
176  0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
177  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
178  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
179  0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
180  0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \
181  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
182 
183 #elif _CODE_PAGE == 850 /* Latin 1 */
184 #define _DF1S 0
185 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
186  0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
187  0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
188  0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
189  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
190  0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
191  0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
192  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
193 
194 #elif _CODE_PAGE == 852 /* Latin 2 */
195 #define _DF1S 0
196 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \
197  0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \
198  0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \
199  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
200  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
201  0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
202  0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \
203  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
204 
205 #elif _CODE_PAGE == 855 /* Cyrillic */
206 #define _DF1S 0
207 #define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \
208  0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
209  0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \
210  0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
211  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
212  0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
213  0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \
214  0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
215 
216 #elif _CODE_PAGE == 857 /* Turkish */
217 #define _DF1S 0
218 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \
219  0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
220  0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
221  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
222  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
223  0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
224  0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
225  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
226 
227 #elif _CODE_PAGE == 860 /* Portuguese */
228 #define _DF1S 0
229 #define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
230  0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
231  0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
232  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
233  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
234  0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
235  0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
236  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
237 
238 #elif _CODE_PAGE == 861 /* Icelandic */
239 #define _DF1S 0
240 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
241  0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
242  0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
243  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
244  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
245  0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
246  0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
247  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
248 
249 #elif _CODE_PAGE == 862 /* Hebrew */
250 #define _DF1S 0
251 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
252  0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
253  0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
254  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
255  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
256  0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
257  0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
258  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
259 
260 #elif _CODE_PAGE == 863 /* Canadian-French */
261 #define _DF1S 0
262 #define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
263  0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
264  0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
265  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
266  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
267  0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
268  0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
269  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
270 
271 #elif _CODE_PAGE == 864 /* Arabic */
272 #define _DF1S 0
273 #define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
274  0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
275  0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
276  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
277  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
278  0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
279  0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
280  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
281 
282 #elif _CODE_PAGE == 865 /* Nordic */
283 #define _DF1S 0
284 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
285  0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
286  0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
287  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
288  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
289  0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
290  0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
291  0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
292 
293 #elif _CODE_PAGE == 866 /* Russian */
294 #define _DF1S 0
295 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
296  0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
297  0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
298  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
299  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
300  0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
301  0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
302  0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
303 
304 #elif _CODE_PAGE == 869 /* Greek 2 */
305 #define _DF1S 0
306 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
307  0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \
308  0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
309  0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
310  0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
311  0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
312  0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
313  0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
314 
315 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
316 #if _USE_LFN != 0
317 #error Cannot enable LFN without valid code page.
318 #endif
319 #define _DF1S 0
320 
321 #else
322 #error Unknown code page
323 
324 #endif
325 
326 
327 /* Character code support macros */
328 #define IsUpper(c) (((c)>='A')&&((c)<='Z'))
329 #define IsLower(c) (((c)>='a')&&((c)<='z'))
330 #define IsDigit(c) (((c)>='0')&&((c)<='9'))
331 
332 #if _DF1S != 0 /* Code page is DBCS */
333 
334 #ifdef _DF2S /* Two 1st byte areas */
335 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
336 #else /* One 1st byte area */
337 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
338 #endif
339 
340 #ifdef _DS3S /* Three 2nd byte areas */
341 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
342 #else /* Two 2nd byte areas */
343 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
344 #endif
345 
346 #else /* Code page is SBCS */
347 
348 #define IsDBCS1(c) 0
349 #define IsDBCS2(c) 0
350 
351 #endif /* _DF1S */
352 
353 
354 /* File attribute bits (internal use) */
355 #define AM_VOL 0x08 /* Volume label */
356 #define AM_LFN 0x0F /* LFN entry */
357 #define AM_MASK 0x3F /* Mask of defined bits */
358 
359 
360 /* File access control and file status flags (internal use) */
361 #define FA_SEEKEND 0x20 /* Seek to end of the file on file open */
362 #define FA_MODIFIED 0x40 /* File has been modified */
363 #define FA_DIRTY 0x80 /* FIL.buf[] needs to be written-back */
364 
365 
366 /* Name status flags */
367 #define NSFLAG 11 /* Index of name status byte in fn[] */
368 #define NS_LOSS 0x01 /* Out of 8.3 format */
369 #define NS_LFN 0x02 /* Force to create LFN entry */
370 #define NS_LAST 0x04 /* Last segment */
371 #define NS_BODY 0x08 /* Lower case flag (body) */
372 #define NS_EXT 0x10 /* Lower case flag (ext) */
373 #define NS_DOT 0x20 /* Dot entry */
374 #define NS_NOLFN 0x40 /* Do not find LFN */
375 #define NS_NONAME 0x80 /* Not followed */
376 
377 
378 /* Limits and boundaries (differ from specs but correct for real DOS/Windows) */
379 #define MAX_FAT12 0xFF5 /* Maximum number of FAT12 clusters */
380 #define MAX_FAT16 0xFFF5 /* Maximum number of FAT16 clusters */
381 #define MAX_FAT32 0xFFFFFF5 /* Maximum number of FAT32 clusters */
382 #define MAX_EXFAT 0x7FFFFFFD /* Maximum number of exFAT clusters (limited by implementation) */
383 #define MAX_DIR 0x200000 /* Maximum size of FAT directory */
384 #define MAX_DIR_EX 0x10000000 /* Maximum size of exFAT directory */
385 
386 
387 /* FatFs refers the members in the FAT structures as byte array instead of
388 / structure members because the structure is not binary compatible between
389 / different platforms */
390 
391 #define BS_JmpBoot 0 /* x86 jump instruction (3-byte) */
392 #define BS_OEMName 3 /* OEM name (8-byte) */
393 #define BPB_BytsPerSec 11 /* Sector size [byte] (WORD) */
394 #define BPB_SecPerClus 13 /* Cluster size [sector] (BYTE) */
395 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (WORD) */
396 #define BPB_NumFATs 16 /* Number of FATs (BYTE) */
397 #define BPB_RootEntCnt 17 /* Size of root directory area for FAT12/16 [entry] (WORD) */
398 #define BPB_TotSec16 19 /* Volume size (16-bit) [sector] (WORD) */
399 #define BPB_Media 21 /* Media descriptor byte (BYTE) */
400 #define BPB_FATSz16 22 /* FAT size (16-bit) [sector] (WORD) */
401 #define BPB_SecPerTrk 24 /* Track size for int13h [sector] (WORD) */
402 #define BPB_NumHeads 26 /* Number of heads for int13h (WORD) */
403 #define BPB_HiddSec 28 /* Volume offset from top of the drive (DWORD) */
404 #define BPB_TotSec32 32 /* Volume size (32-bit) [sector] (DWORD) */
405 #define BS_DrvNum 36 /* Physical drive number for int13h (BYTE) */
406 #define BS_NTres 37 /* Error flag (BYTE) */
407 #define BS_BootSig 38 /* Extended boot signature (BYTE) */
408 #define BS_VolID 39 /* Volume serial number (DWORD) */
409 #define BS_VolLab 43 /* Volume label string (8-byte) */
410 #define BS_FilSysType 54 /* File system type string (8-byte) */
411 #define BS_BootCode 62 /* Boot code (448-byte) */
412 #define BS_55AA 510 /* Signature word (WORD) */
413 
414 #define BPB_FATSz32 36 /* FAT32: FAT size [sector] (DWORD) */
415 #define BPB_ExtFlags32 40 /* FAT32: Extended flags (WORD) */
416 #define BPB_FSVer32 42 /* FAT32: File system version (WORD) */
417 #define BPB_RootClus32 44 /* FAT32: Root directory cluster (DWORD) */
418 #define BPB_FSInfo32 48 /* FAT32: Offset of FSINFO sector (WORD) */
419 #define BPB_BkBootSec32 50 /* FAT32: Offset of backup boot sector (WORD) */
420 #define BS_DrvNum32 64 /* FAT32: Physical drive number for int13h (BYTE) */
421 #define BS_NTres32 65 /* FAT32: Error flag (BYTE) */
422 #define BS_BootSig32 66 /* FAT32: Extended boot signature (BYTE) */
423 #define BS_VolID32 67 /* FAT32: Volume serial number (DWORD) */
424 #define BS_VolLab32 71 /* FAT32: Volume label string (8-byte) */
425 #define BS_FilSysType32 82 /* FAT32: File system type string (8-byte) */
426 #define BS_BootCode32 90 /* FAT32: Boot code (420-byte) */
427 
428 #define BPB_ZeroedEx 11 /* exFAT: MBZ field (53-byte) */
429 #define BPB_VolOfsEx 64 /* exFAT: Volume offset from top of the drive [sector] (QWORD) */
430 #define BPB_TotSecEx 72 /* exFAT: Volume size [sector] (QWORD) */
431 #define BPB_FatOfsEx 80 /* exFAT: FAT offset from top of the volume [sector] (DWORD) */
432 #define BPB_FatSzEx 84 /* exFAT: FAT size [sector] (DWORD) */
433 #define BPB_DataOfsEx 88 /* exFAT: Data offset from top of the volume [sector] (DWORD) */
434 #define BPB_NumClusEx 92 /* exFAT: Number of clusters (DWORD) */
435 #define BPB_RootClusEx 96 /* exFAT: Root directory cluster (DWORD) */
436 #define BPB_VolIDEx 100 /* exFAT: Volume serial number (DWORD) */
437 #define BPB_FSVerEx 104 /* exFAT: File system version (WORD) */
438 #define BPB_VolFlagEx 106 /* exFAT: Volume flags (BYTE) */
439 #define BPB_ActFatEx 107 /* exFAT: Active FAT flags (BYTE) */
440 #define BPB_BytsPerSecEx 108 /* exFAT: Log2 of sector size in byte (BYTE) */
441 #define BPB_SecPerClusEx 109 /* exFAT: Log2 of cluster size in sector (BYTE) */
442 #define BPB_NumFATsEx 110 /* exFAT: Number of FATs (BYTE) */
443 #define BPB_DrvNumEx 111 /* exFAT: Physical drive number for int13h (BYTE) */
444 #define BPB_PercInUseEx 112 /* exFAT: Percent in use (BYTE) */
445 #define BPB_RsvdEx 113 /* exFAT: Reserved (7-byte) */
446 #define BS_BootCodeEx 120 /* exFAT: Boot code (390-byte) */
447 
448 #define FSI_LeadSig 0 /* FAT32 FSI: Leading signature (DWORD) */
449 #define FSI_StrucSig 484 /* FAT32 FSI: Structure signature (DWORD) */
450 #define FSI_Free_Count 488 /* FAT32 FSI: Number of free clusters (DWORD) */
451 #define FSI_Nxt_Free 492 /* FAT32 FSI: Last allocated cluster (DWORD) */
452 
453 #define MBR_Table 446 /* MBR: Offset of partition table in the MBR */
454 #define SZ_PTE 16 /* MBR: Size of a partition table entry */
455 #define PTE_Boot 0 /* MBR PTE: Boot indicator */
456 #define PTE_StHead 1 /* MBR PTE: Start head */
457 #define PTE_StSec 2 /* MBR PTE: Start sector */
458 #define PTE_StCyl 3 /* MBR PTE: Start cylinder */
459 #define PTE_System 4 /* MBR PTE: System ID */
460 #define PTE_EdHead 5 /* MBR PTE: End head */
461 #define PTE_EdSec 6 /* MBR PTE: End sector */
462 #define PTE_EdCyl 7 /* MBR PTE: End cylinder */
463 #define PTE_StLba 8 /* MBR PTE: Start in LBA */
464 #define PTE_SizLba 12 /* MBR PTE: Size in LBA */
465 
466 #define DIR_Name 0 /* Short file name (11-byte) */
467 #define DIR_Attr 11 /* Attribute (BYTE) */
468 #define DIR_NTres 12 /* Lower case flag (BYTE) */
469 #define DIR_CrtTime10 13 /* Created time sub-second (BYTE) */
470 #define DIR_CrtTime 14 /* Created time (DWORD) */
471 #define DIR_LstAccDate 18 /* Last accessed date (WORD) */
472 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (WORD) */
473 #define DIR_ModTime 22 /* Modified time (DWORD) */
474 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (WORD) */
475 #define DIR_FileSize 28 /* File size (DWORD) */
476 #define LDIR_Ord 0 /* LFN entry order and LLE flag (BYTE) */
477 #define LDIR_Attr 11 /* LFN attribute (BYTE) */
478 #define LDIR_Type 12 /* LFN type (BYTE) */
479 #define LDIR_Chksum 13 /* Checksum of the SFN entry (BYTE) */
480 #define LDIR_FstClusLO 26 /* Must be zero (WORD) */
481 #define XDIR_Type 0 /* Type of exFAT directory entry (BYTE) */
482 #define XDIR_NumLabel 1 /* Number of volume label characters (BYTE) */
483 #define XDIR_Label 2 /* Volume label (11-WORD) */
484 #define XDIR_CaseSum 4 /* Sum of case conversion table (DWORD) */
485 #define XDIR_NumSec 1 /* Number of secondary entries (BYTE) */
486 #define XDIR_SetSum 2 /* Sum of the set of directory entries (WORD) */
487 #define XDIR_Attr 4 /* File attribute (WORD) */
488 #define XDIR_CrtTime 8 /* Created time (DWORD) */
489 #define XDIR_ModTime 12 /* Modified time (DWORD) */
490 #define XDIR_AccTime 16 /* Last accessed time (DWORD) */
491 #define XDIR_CrtTime10 20 /* Created time subsecond (BYTE) */
492 #define XDIR_ModTime10 21 /* Modified time subsecond (BYTE) */
493 #define XDIR_CrtTZ 22 /* Created timezone (BYTE) */
494 #define XDIR_ModTZ 23 /* Modified timezone (BYTE) */
495 #define XDIR_AccTZ 24 /* Last accessed timezone (BYTE) */
496 #define XDIR_GenFlags 33 /* Gneral secondary flags (WORD) */
497 #define XDIR_NumName 35 /* Number of file name characters (BYTE) */
498 #define XDIR_NameHash 36 /* Hash of file name (WORD) */
499 #define XDIR_ValidFileSize 40 /* Valid file size (QWORD) */
500 #define XDIR_FstClus 52 /* First cluster of the file data (DWORD) */
501 #define XDIR_FileSize 56 /* File/Directory size (QWORD) */
502 
503 #define SZDIRE 32 /* Size of a directory entry */
504 #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */
505 #define DDEM 0xE5 /* Deleted directory entry mark set to DIR_Name[0] */
506 #define RDDEM 0x05 /* Replacement of the character collides with DDEM */
507 
508 
509 
510 
511 
512 /*--------------------------------------------------------------------------
513 
514  Module Private Work Area
515 
516 ---------------------------------------------------------------------------*/
517 
518 /* Remark: Variables here without initial value shall be guaranteed zero/null
519 / at start-up. If not, either the linker or start-up routine being used is
520 / not compliance with C standard. */
521 
522 #if _VOLUMES < 1 || _VOLUMES > 9
523 #error Wrong _VOLUMES setting
524 #endif
525 static FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */
526 static WORD Fsid; /* File system mount ID */
527 
528 #if _FS_RPATH != 0 && _VOLUMES >= 2
529 static BYTE CurrVol; /* Current drive */
530 #endif
531 
532 #if _FS_LOCK != 0
533 static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */
534 #endif
535 
536 #if _USE_LFN == 0 /* Non-LFN configuration */
537 #define DEF_NAMBUF
538 #define INIT_NAMBUF(fs)
539 #define FREE_NAMBUF()
540 #else
541 #if _MAX_LFN < 12 || _MAX_LFN > 255
542 #error Wrong _MAX_LFN setting
543 #endif
544 
545 #if _USE_LFN == 1 /* LFN enabled with static working buffer */
546 #if _FS_EXFAT
547 static BYTE DirBuf[SZDIRE*19]; /* Directory entry block scratchpad buffer (19 entries in size) */
548 #endif
549 static WCHAR LfnBuf[_MAX_LFN+1]; /* LFN enabled with static working buffer */
550 #define DEF_NAMBUF
551 #define INIT_NAMBUF(fs)
552 #define FREE_NAMBUF()
553 
554 #elif _USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */
555 #if _FS_EXFAT
556 #define DEF_NAMBUF WCHAR lbuf[_MAX_LFN+1]; BYTE dbuf[SZDIRE*19];
557 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; }
558 #define FREE_NAMBUF()
559 #else
560 #define DEF_NAMBUF WCHAR lbuf[_MAX_LFN+1];
561 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; }
562 #define FREE_NAMBUF()
563 #endif
564 
565 #elif _USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */
566 #if _FS_EXFAT
567 #define DEF_NAMBUF WCHAR *lfn;
568 #define INIT_NAMBUF(fs) { lfn = ff_memalloc((_MAX_LFN+1)*2 + SZDIRE*19); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; (fs)->dirbuf = (BYTE*)(lfn+_MAX_LFN+1); }
569 #define FREE_NAMBUF() ff_memfree(lfn)
570 #else
571 #define DEF_NAMBUF WCHAR *lfn;
572 #define INIT_NAMBUF(fs) { lfn = ff_memalloc((_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; }
573 #define FREE_NAMBUF() ff_memfree(lfn)
574 #endif
575 
576 #else
577 #error Wrong _USE_LFN setting
578 #endif
579 #endif
580 
581 #ifdef _EXCVT
582 static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for SBCS extended characters */
583 #endif
584 
585 
586 
587 
588 
589 
590 /*--------------------------------------------------------------------------
591 
592  Module Private Functions
593 
594 ---------------------------------------------------------------------------*/
595 
596 
597 /*-----------------------------------------------------------------------*/
598 /* Load/Store multi-byte word in the FAT structure */
599 /*-----------------------------------------------------------------------*/
600 
601 static
602 WORD ld_word (const BYTE* ptr) /* Load a 2-byte little-endian word */
603 {
604  WORD rv;
605 
606  rv = ptr[1];
607  rv = rv << 8 | ptr[0];
608  return rv;
609 }
610 
611 static
612 DWORD ld_dword (const BYTE* ptr) /* Load a 4-byte little-endian word */
613 {
614  DWORD rv;
615 
616  rv = ptr[3];
617  rv = rv << 8 | ptr[2];
618  rv = rv << 8 | ptr[1];
619  rv = rv << 8 | ptr[0];
620  return rv;
621 }
622 
623 #if _FS_EXFAT
624 static
625 QWORD ld_qword (const BYTE* ptr) /* Load an 8-byte little-endian word */
626 {
627  QWORD rv;
628 
629  rv = ptr[7];
630  rv = rv << 8 | ptr[6];
631  rv = rv << 8 | ptr[5];
632  rv = rv << 8 | ptr[4];
633  rv = rv << 8 | ptr[3];
634  rv = rv << 8 | ptr[2];
635  rv = rv << 8 | ptr[1];
636  rv = rv << 8 | ptr[0];
637  return rv;
638 }
639 #endif
640 
641 #if !_FS_READONLY
642 static
643 void st_word (BYTE* ptr, WORD val) /* Store a 2-byte word in little-endian */
644 {
645  *ptr++ = (BYTE)val; val >>= 8;
646  *ptr++ = (BYTE)val;
647 }
648 
649 static
650 void st_dword (BYTE* ptr, DWORD val) /* Store a 4-byte word in little-endian */
651 {
652  *ptr++ = (BYTE)val; val >>= 8;
653  *ptr++ = (BYTE)val; val >>= 8;
654  *ptr++ = (BYTE)val; val >>= 8;
655  *ptr++ = (BYTE)val;
656 }
657 
658 #if _FS_EXFAT
659 static
660 void st_qword (BYTE* ptr, QWORD val) /* Store an 8-byte word in little-endian */
661 {
662  *ptr++ = (BYTE)val; val >>= 8;
663  *ptr++ = (BYTE)val; val >>= 8;
664  *ptr++ = (BYTE)val; val >>= 8;
665  *ptr++ = (BYTE)val; val >>= 8;
666  *ptr++ = (BYTE)val; val >>= 8;
667  *ptr++ = (BYTE)val; val >>= 8;
668  *ptr++ = (BYTE)val; val >>= 8;
669  *ptr++ = (BYTE)val;
670 }
671 #endif
672 #endif /* !_FS_READONLY */
673 
674 
675 
676 /*-----------------------------------------------------------------------*/
677 /* String functions */
678 /*-----------------------------------------------------------------------*/
679 
680 /* Copy memory to memory */
681 static
682 void mem_cpy (void* dst, const void* src, UINT cnt) {
683  BYTE *d = (BYTE*)dst;
684  const BYTE *s = (const BYTE*)src;
685 
686  if (cnt) {
687  do *d++ = *s++; while (--cnt);
688  }
689 }
690 
691 /* Fill memory block */
692 static
693 void mem_set (void* dst, int val, UINT cnt) {
694  BYTE *d = (BYTE*)dst;
695 
696  do *d++ = (BYTE)val; while (--cnt);
697 }
698 
699 /* Compare memory block */
700 static
701 int mem_cmp (const void* dst, const void* src, UINT cnt) { /* ZR:same, NZ:different */
702  const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
703  int r = 0;
704 
705  do {
706  r = *d++ - *s++;
707  } while (--cnt && r == 0);
708 
709  return r;
710 }
711 
712 /* Check if chr is contained in the string */
713 static
714 int chk_chr (const char* str, int chr) { /* NZ:contained, ZR:not contained */
715  while (*str && *str != chr) str++;
716  return *str;
717 }
718 
719 
720 
721 
722 #if _FS_REENTRANT
723 /*-----------------------------------------------------------------------*/
724 /* Request/Release grant to access the volume */
725 /*-----------------------------------------------------------------------*/
726 static
727 int lock_fs (
728  FATFS* fs /* File system object */
729 )
730 {
731  return ff_req_grant(fs->sobj);
732 }
733 
734 
735 static
736 void unlock_fs (
737  FATFS* fs, /* File system object */
738  FRESULT res /* Result code to be returned */
739 )
740 {
741  if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_TIMEOUT) {
742  ff_rel_grant(fs->sobj);
743  }
744 }
745 
746 #endif
747 
748 
749 
750 #if _FS_LOCK != 0
751 /*-----------------------------------------------------------------------*/
752 /* File lock control functions */
753 /*-----------------------------------------------------------------------*/
754 
755 static
756 FRESULT chk_lock ( /* Check if the file can be accessed */
757  DIR* dp, /* Directory object pointing the file to be checked */
758  int acc /* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */
759 )
760 {
761  UINT i, be;
762 
763  /* Search file semaphore table */
764  for (i = be = 0; i < _FS_LOCK; i++) {
765  if (Files[i].fs) { /* Existing entry */
766  if (Files[i].fs == dp->obj.fs && /* Check if the object matched with an open object */
767  Files[i].clu == dp->obj.sclust &&
768  Files[i].ofs == dp->dptr) break;
769  } else { /* Blank entry */
770  be = 1;
771  }
772  }
773  if (i == _FS_LOCK) { /* The object is not opened */
774  return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */
775  }
776 
777  /* The object has been opened. Reject any open against writing file and all write mode open */
778  return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
779 }
780 
781 
782 static
783 int enq_lock (void) /* Check if an entry is available for a new object */
784 {
785  UINT i;
786 
787  for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
788  return (i == _FS_LOCK) ? 0 : 1;
789 }
790 
791 
792 static
793 UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */
794  DIR* dp, /* Directory object pointing the file to register or increment */
795  int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
796 )
797 {
798  UINT i;
799 
800 
801  for (i = 0; i < _FS_LOCK; i++) { /* Find the object */
802  if (Files[i].fs == dp->obj.fs &&
803  Files[i].clu == dp->obj.sclust &&
804  Files[i].ofs == dp->dptr) break;
805  }
806 
807  if (i == _FS_LOCK) { /* Not opened. Register it as new. */
808  for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
809  if (i == _FS_LOCK) return 0; /* No free entry to register (int err) */
810  Files[i].fs = dp->obj.fs;
811  Files[i].clu = dp->obj.sclust;
812  Files[i].ofs = dp->dptr;
813  Files[i].ctr = 0;
814  }
815 
816  if (acc && Files[i].ctr) return 0; /* Access violation (int err) */
817 
818  Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
819 
820  return i + 1;
821 }
822 
823 
824 static
825 FRESULT dec_lock ( /* Decrement object open counter */
826  UINT i /* Semaphore index (1..) */
827 )
828 {
829  WORD n;
830  FRESULT res;
831 
832 
833  if (--i < _FS_LOCK) { /* Shift index number origin from 0 */
834  n = Files[i].ctr;
835  if (n == 0x100) n = 0; /* If write mode open, delete the entry */
836  if (n > 0) n--; /* Decrement read mode open count */
837  Files[i].ctr = n;
838  if (n == 0) Files[i].fs = 0; /* Delete the entry if open count gets zero */
839  res = FR_OK;
840  } else {
841  res = FR_INT_ERR; /* Invalid index nunber */
842  }
843  return res;
844 }
845 
846 
847 static
848 void clear_lock ( /* Clear lock entries of the volume */
849  FATFS *fs
850 )
851 {
852  UINT i;
853 
854  for (i = 0; i < _FS_LOCK; i++) {
855  if (Files[i].fs == fs) Files[i].fs = 0;
856  }
857 }
858 
859 #endif /* _FS_LOCK != 0 */
860 
861 
862 
863 /*-----------------------------------------------------------------------*/
864 /* Move/Flush disk access window in the file system object */
865 /*-----------------------------------------------------------------------*/
866 #if !_FS_READONLY
867 static
868 FRESULT sync_window ( /* Returns FR_OK or FR_DISK_ERROR */
869  FATFS* fs /* File system object */
870 )
871 {
872  DWORD wsect;
873  UINT nf;
874  FRESULT res = FR_OK;
875 
876 
877  if (fs->wflag) { /* Write back the sector if it is dirty */
878  wsect = fs->winsect; /* Current sector number */
879  if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) {
880  res = FR_DISK_ERR;
881  } else {
882  fs->wflag = 0;
883  if (wsect - fs->fatbase < fs->fsize) { /* Is it in the FAT area? */
884  for (nf = fs->n_fats; nf >= 2; nf--) { /* Reflect the change to all FAT copies */
885  wsect += fs->fsize;
886  disk_write(fs->drv, fs->win, wsect, 1);
887  }
888  }
889  }
890  }
891  return res;
892 }
893 #endif
894 
895 
896 static
897 FRESULT move_window ( /* Returns FR_OK or FR_DISK_ERROR */
898  FATFS* fs, /* File system object */
899  DWORD sector /* Sector number to make appearance in the fs->win[] */
900 )
901 {
902  FRESULT res = FR_OK;
903 
904 
905  if (sector != fs->winsect) { /* Window offset changed? */
906 #if !_FS_READONLY
907  res = sync_window(fs); /* Write-back changes */
908 #endif
909  if (res == FR_OK) { /* Fill sector window with new data */
910  if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) {
911  sector = 0xFFFFFFFF; /* Invalidate window if data is not reliable */
912  res = FR_DISK_ERR;
913  }
914  fs->winsect = sector;
915  }
916  }
917  return res;
918 }
919 
920 
921 
922 
923 #if !_FS_READONLY
924 /*-----------------------------------------------------------------------*/
925 /* Synchronize file system and strage device */
926 /*-----------------------------------------------------------------------*/
927 
928 static
929 FRESULT sync_fs ( /* FR_OK:succeeded, !=0:error */
930  FATFS* fs /* File system object */
931 )
932 {
933  FRESULT res;
934 
935 
936  res = sync_window(fs);
937  if (res == FR_OK) {
938  /* Update FSInfo sector if needed */
939  if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) {
940  /* Create FSInfo structure */
941  mem_set(fs->win, 0, SS(fs));
942  st_word(fs->win + BS_55AA, 0xAA55);
943  st_dword(fs->win + FSI_LeadSig, 0x41615252);
944  st_dword(fs->win + FSI_StrucSig, 0x61417272);
945  st_dword(fs->win + FSI_Free_Count, fs->free_clst);
946  st_dword(fs->win + FSI_Nxt_Free, fs->last_clst);
947  /* Write it into the FSInfo sector */
948  fs->winsect = fs->volbase + 1;
949  disk_write(fs->drv, fs->win, fs->winsect, 1);
950  fs->fsi_flag = 0;
951  }
952  /* Make sure that no pending write process in the physical drive */
953  if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK) res = FR_DISK_ERR;
954  }
955 
956  return res;
957 }
958 
959 #endif
960 
961 
962 
963 /*-----------------------------------------------------------------------*/
964 /* Get sector# from cluster# */
965 /*-----------------------------------------------------------------------*/
966 
967 static
968 DWORD clust2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */
969  FATFS* fs, /* File system object */
970  DWORD clst /* Cluster# to be converted */
971 )
972 {
973  clst -= 2;
974  if (clst >= fs->n_fatent - 2) return 0; /* Invalid cluster# */
975  return clst * fs->csize + fs->database;
976 }
977 
978 
979 
980 
981 /*-----------------------------------------------------------------------*/
982 /* FAT access - Read value of a FAT entry */
983 /*-----------------------------------------------------------------------*/
984 
985 static
986 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */
987  _FDID* obj, /* Corresponding object */
988  DWORD clst /* Cluster number to get the value */
989 )
990 {
991  UINT wc, bc;
992  DWORD val;
993  FATFS *fs = obj->fs;
994 
995 
996  if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
997  val = 1; /* Internal error */
998 
999  } else {
1000  val = 0xFFFFFFFF; /* Default value falls on disk error */
1001 
1002  switch (fs->fs_type) {
1003  case FS_FAT12 :
1004  bc = (UINT)clst; bc += bc / 2;
1005  if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
1006  wc = fs->win[bc++ % SS(fs)];
1007  if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
1008  wc |= fs->win[bc % SS(fs)] << 8;
1009  val = (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
1010  break;
1011 
1012  case FS_FAT16 :
1013  if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
1014  val = ld_word(fs->win + clst * 2 % SS(fs));
1015  break;
1016 
1017  case FS_FAT32 :
1018  if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
1019  val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF;
1020  break;
1021 #if _FS_EXFAT
1022  case FS_EXFAT :
1023  if (obj->objsize) {
1024  DWORD cofs = clst - obj->sclust; /* Offset from start cluster */
1025  DWORD clen = (DWORD)((obj->objsize - 1) / SS(fs)) / fs->csize; /* Number of clusters - 1 */
1026 
1027  if (obj->stat == 2) { /* Is there no valid chain on the FAT? */
1028  if (cofs <= clen) {
1029  val = (cofs == clen) ? 0x7FFFFFFF : clst + 1; /* Generate the value */
1030  break;
1031  }
1032  }
1033  if (obj->stat == 3 && cofs < obj->n_cont) { /* Is it in the contiguous part? */
1034  val = clst + 1; /* Generate the value */
1035  break;
1036  }
1037  if (obj->stat != 2) { /* Get value from FAT if FAT chain is valid */
1038  if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
1039  val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF;
1040  break;
1041  }
1042  }
1043  /* go next */
1044 #endif
1045  default:
1046  val = 1; /* Internal error */
1047  }
1048  }
1049 
1050  return val;
1051 }
1052 
1053 
1054 
1055 
1056 #if !_FS_READONLY
1057 /*-----------------------------------------------------------------------*/
1058 /* FAT access - Change value of a FAT entry */
1059 /*-----------------------------------------------------------------------*/
1060 
1061 static
1062 FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */
1063  FATFS* fs, /* Corresponding file system object */
1064  DWORD clst, /* FAT index number (cluster number) to be changed */
1065  DWORD val /* New value to be set to the entry */
1066 )
1067 {
1068  UINT bc;
1069  BYTE *p;
1070  FRESULT res = FR_INT_ERR;
1071 
1072 
1073  if (clst >= 2 && clst < fs->n_fatent) { /* Check if in valid range */
1074  switch (fs->fs_type) {
1075  case FS_FAT12 : /* Bitfield items */
1076  bc = (UINT)clst; bc += bc / 2;
1077  res = move_window(fs, fs->fatbase + (bc / SS(fs)));
1078  if (res != FR_OK) break;
1079  p = fs->win + bc++ % SS(fs);
1080  *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
1081  fs->wflag = 1;
1082  res = move_window(fs, fs->fatbase + (bc / SS(fs)));
1083  if (res != FR_OK) break;
1084  p = fs->win + bc % SS(fs);
1085  *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
1086  fs->wflag = 1;
1087  break;
1088 
1089  case FS_FAT16 : /* WORD aligned items */
1090  res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
1091  if (res != FR_OK) break;
1092  st_word(fs->win + clst * 2 % SS(fs), (WORD)val);
1093  fs->wflag = 1;
1094  break;
1095 
1096  case FS_FAT32 : /* DWORD aligned items */
1097 #if _FS_EXFAT
1098  case FS_EXFAT :
1099 #endif
1100  res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
1101  if (res != FR_OK) break;
1102  if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) {
1103  val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000);
1104  }
1105  st_dword(fs->win + clst * 4 % SS(fs), val);
1106  fs->wflag = 1;
1107  break;
1108  }
1109  }
1110  return res;
1111 }
1112 
1113 #endif /* !_FS_READONLY */
1114 
1115 
1116 
1117 
1118 #if _FS_EXFAT && !_FS_READONLY
1119 /*-----------------------------------------------------------------------*/
1120 /* exFAT: Accessing FAT and Allocation Bitmap */
1121 /*-----------------------------------------------------------------------*/
1122 
1123 /*---------------------------------------------*/
1124 /* exFAT: Find a contiguous free cluster block */
1125 /*---------------------------------------------*/
1126 
1127 static
1128 DWORD find_bitmap ( /* 0:No free cluster, 2..:Free cluster found, 0xFFFFFFFF:Disk error */
1129  FATFS* fs, /* File system object */
1130  DWORD clst, /* Cluster number to scan from */
1131  DWORD ncl /* Number of contiguous clusters to find (1..) */
1132 )
1133 {
1134  BYTE bm, bv;
1135  UINT i;
1136  DWORD val, scl, ctr;
1137 
1138 
1139  clst -= 2; /* The first bit in the bitmap corresponds to cluster #2 */
1140  if (clst >= fs->n_fatent - 2) clst = 0;
1141  scl = val = clst; ctr = 0;
1142  for (;;) {
1143  if (move_window(fs, fs->database + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF; /* (assuming bitmap is located top of the cluster heap) */
1144  i = val / 8 % SS(fs); bm = 1 << (val % 8);
1145  do {
1146  do {
1147  bv = fs->win[i] & bm; bm <<= 1; /* Get bit value */
1148  if (++val >= fs->n_fatent - 2) { /* Next cluster (with wrap-around) */
1149  val = 0; bm = 0; i = 4096;
1150  }
1151  if (!bv) { /* Is it a free cluster? */
1152  if (++ctr == ncl) return scl + 2; /* Check run length */
1153  } else {
1154  scl = val; ctr = 0; /* Encountered a live cluster, restart to scan */
1155  }
1156  if (val == clst) return 0; /* All cluster scanned? */
1157  } while (bm);
1158  bm = 1;
1159  } while (++i < SS(fs));
1160  }
1161 }
1162 
1163 
1164 /*------------------------------------*/
1165 /* exFAT: Set/Clear a block of bitmap */
1166 /*------------------------------------*/
1167 
1168 static
1169 FRESULT change_bitmap (
1170  FATFS* fs, /* File system object */
1171  DWORD clst, /* Cluster number to change from */
1172  DWORD ncl, /* Number of clusters to be changed */
1173  int bv /* bit value to be set (0 or 1) */
1174 )
1175 {
1176  BYTE bm;
1177  UINT i;
1178  DWORD sect;
1179 
1180 
1181  clst -= 2; /* The first bit corresponds to cluster #2 */
1182  sect = fs->database + clst / 8 / SS(fs); /* Sector address (assuming bitmap is located top of the cluster heap) */
1183  i = clst / 8 % SS(fs); /* Byte offset in the sector */
1184  bm = 1 << (clst % 8); /* Bit mask in the byte */
1185  for (;;) {
1186  if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR;
1187  do {
1188  do {
1189  if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR; /* Is the bit expected value? */
1190  fs->win[i] ^= bm; /* Flip the bit */
1191  fs->wflag = 1;
1192  if (--ncl == 0) return FR_OK; /* All bits processed? */
1193  } while (bm <<= 1); /* Next bit */
1194  bm = 1;
1195  } while (++i < SS(fs)); /* Next byte */
1196  i = 0;
1197  }
1198 }
1199 
1200 
1201 /*---------------------------------------------*/
1202 /* Complement contiguous part of the FAT chain */
1203 /*---------------------------------------------*/
1204 
1205 static
1206 FRESULT fill_fat_chain (
1207  _FDID* obj /* Pointer to the corresponding object */
1208 )
1209 {
1210  FRESULT res;
1211  DWORD cl, n;
1212 
1213  if (obj->stat == 3) { /* Has the object been changed 'fragmented'? */
1214  for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) { /* Create cluster chain on the FAT */
1215  res = put_fat(obj->fs, cl, cl + 1);
1216  if (res != FR_OK) return res;
1217  }
1218  obj->stat = 0; /* Change status 'FAT chain is valid' */
1219  }
1220  return FR_OK;
1221 }
1222 
1223 #endif /* _FS_EXFAT && !_FS_READONLY */
1224 
1225 
1226 
1227 #if !_FS_READONLY
1228 /*-----------------------------------------------------------------------*/
1229 /* FAT handling - Remove a cluster chain */
1230 /*-----------------------------------------------------------------------*/
1231 static
1232 FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */
1233  _FDID* obj, /* Corresponding object */
1234  DWORD clst, /* Cluster to remove a chain from */
1235  DWORD pclst /* Previous cluster of clst (0:an entire chain) */
1236 )
1237 {
1238  FRESULT res = FR_OK;
1239  DWORD nxt;
1240  FATFS *fs = obj->fs;
1241 #if _FS_EXFAT || _USE_TRIM
1242  DWORD scl = clst, ecl = clst;
1243 #endif
1244 #if _USE_TRIM
1245  DWORD rt[2];
1246 #endif
1247 
1248  if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Check if in valid range */
1249 
1250  /* Mark the previous cluster 'EOC' on the FAT if it exists */
1251  if (pclst && (!_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) {
1252  res = put_fat(fs, pclst, 0xFFFFFFFF);
1253  if (res != FR_OK) return res;
1254  }
1255 
1256  /* Remove the chain */
1257  do {
1258  nxt = get_fat(obj, clst); /* Get cluster status */
1259  if (nxt == 0) break; /* Empty cluster? */
1260  if (nxt == 1) return FR_INT_ERR; /* Internal error? */
1261  if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error? */
1262  if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) {
1263  res = put_fat(fs, clst, 0); /* Mark the cluster 'free' on the FAT */
1264  if (res != FR_OK) return res;
1265  }
1266  if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */
1267  fs->free_clst++;
1268  fs->fsi_flag |= 1;
1269  }
1270 #if _FS_EXFAT || _USE_TRIM
1271  if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
1272  ecl = nxt;
1273  } else { /* End of contiguous cluster block */
1274 #if _FS_EXFAT
1275  if (fs->fs_type == FS_EXFAT) {
1276  res = change_bitmap(fs, scl, ecl - scl + 1, 0); /* Mark the cluster block 'free' on the bitmap */
1277  if (res != FR_OK) return res;
1278  }
1279 #endif
1280 #if _USE_TRIM
1281  rt[0] = clust2sect(fs, scl); /* Start sector */
1282  rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */
1283  disk_ioctl(fs->drv, CTRL_TRIM, rt); /* Inform device the block can be erased */
1284 #endif
1285  scl = ecl = nxt;
1286  }
1287 #endif
1288  clst = nxt; /* Next cluster */
1289  } while (clst < fs->n_fatent); /* Repeat while not the last link */
1290 
1291 #if _FS_EXFAT
1292  if (fs->fs_type == FS_EXFAT) {
1293  if (pclst == 0) { /* Does object have no chain? */
1294  obj->stat = 0; /* Change the object status 'initial' */
1295  } else {
1296  if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) { /* Did the chain got contiguous? */
1297  obj->stat = 2; /* Change the object status 'contiguous' */
1298  }
1299  }
1300  }
1301 #endif
1302  return FR_OK;
1303 }
1304 
1305 
1306 
1307 
1308 /*-----------------------------------------------------------------------*/
1309 /* FAT handling - Stretch a chain or Create a new chain */
1310 /*-----------------------------------------------------------------------*/
1311 static
1312 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
1313  _FDID* obj, /* Corresponding object */
1314  DWORD clst /* Cluster# to stretch, 0:Create a new chain */
1315 )
1316 {
1317  DWORD cs, ncl, scl;
1318  FRESULT res;
1319  FATFS *fs = obj->fs;
1320 
1321 
1322  if (clst == 0) { /* Create a new chain */
1323  scl = fs->last_clst; /* Get suggested cluster to start from */
1324  if (scl == 0 || scl >= fs->n_fatent) scl = 1;
1325  }
1326  else { /* Stretch current chain */
1327  cs = get_fat(obj, clst); /* Check the cluster status */
1328  if (cs < 2) return 1; /* Invalid value */
1329  if (cs == 0xFFFFFFFF) return cs; /* A disk error occurred */
1330  if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
1331  scl = clst;
1332  }
1333 
1334 #if _FS_EXFAT
1335  if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
1336  ncl = find_bitmap(fs, scl, 1); /* Find a free cluster */
1337  if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl; /* No free cluster or hard error? */
1338  res = change_bitmap(fs, ncl, 1, 1); /* Mark the cluster 'in use' */
1339  if (res == FR_INT_ERR) return 1;
1340  if (res == FR_DISK_ERR) return 0xFFFFFFFF;
1341  if (clst == 0) { /* Is it a new chain? */
1342  obj->stat = 2; /* Set status 'contiguous chain' */
1343  } else { /* This is a stretched chain */
1344  if (obj->stat == 2 && ncl != scl + 1) { /* Is the chain got fragmented? */
1345  obj->n_cont = scl - obj->sclust; /* Set size of the contiguous part */
1346  obj->stat = 3; /* Change status 'just fragmented' */
1347  }
1348  }
1349  } else
1350 #endif
1351  { /* On the FAT12/16/32 volume */
1352  ncl = scl; /* Start cluster */
1353  for (;;) {
1354  ncl++; /* Next cluster */
1355  if (ncl >= fs->n_fatent) { /* Check wrap-around */
1356  ncl = 2;
1357  if (ncl > scl) return 0; /* No free cluster */
1358  }
1359  cs = get_fat(obj, ncl); /* Get the cluster status */
1360  if (cs == 0) break; /* Found a free cluster */
1361  if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* An error occurred */
1362  if (ncl == scl) return 0; /* No free cluster */
1363  }
1364  }
1365 
1366  if (_FS_EXFAT && fs->fs_type == FS_EXFAT && obj->stat == 2) { /* Is it a contiguous chain? */
1367  res = FR_OK; /* FAT does not need to be written */
1368  } else {
1369  res = put_fat(fs, ncl, 0xFFFFFFFF); /* Mark the new cluster 'EOC' */
1370  if (res == FR_OK && clst) {
1371  res = put_fat(fs, clst, ncl); /* Link it from the previous one if needed */
1372  }
1373  }
1374 
1375  if (res == FR_OK) { /* Update FSINFO if function succeeded. */
1376  fs->last_clst = ncl;
1377  if (fs->free_clst < fs->n_fatent - 2) fs->free_clst--;
1378  fs->fsi_flag |= 1;
1379  } else {
1380  ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; /* Failed. Create error status */
1381  }
1382 
1383  return ncl; /* Return new cluster number or error status */
1384 }
1385 
1386 #endif /* !_FS_READONLY */
1387 
1388 
1389 
1390 
1391 #if _USE_FASTSEEK
1392 /*-----------------------------------------------------------------------*/
1393 /* FAT handling - Convert offset into cluster with link map table */
1394 /*-----------------------------------------------------------------------*/
1395 
1396 static
1397 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
1398  FIL* fp, /* Pointer to the file object */
1399  FSIZE_t ofs /* File offset to be converted to cluster# */
1400 )
1401 {
1402  DWORD cl, ncl, *tbl;
1403  FATFS *fs = fp->obj.fs;
1404 
1405 
1406  tbl = fp->cltbl + 1; /* Top of CLMT */
1407  cl = (DWORD)(ofs / SS(fs) / fs->csize); /* Cluster order from top of the file */
1408  for (;;) {
1409  ncl = *tbl++; /* Number of cluters in the fragment */
1410  if (ncl == 0) return 0; /* End of table? (error) */
1411  if (cl < ncl) break; /* In this fragment? */
1412  cl -= ncl; tbl++; /* Next fragment */
1413  }
1414  return cl + *tbl; /* Return the cluster number */
1415 }
1416 
1417 #endif /* _USE_FASTSEEK */
1418 
1419 
1420 
1421 
1422 /*-----------------------------------------------------------------------*/
1423 /* Directory handling - Set directory index */
1424 /*-----------------------------------------------------------------------*/
1425 
1426 static
1427 FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */
1428  DIR* dp, /* Pointer to directory object */
1429  DWORD ofs /* Offset of directory table */
1430 )
1431 {
1432  DWORD csz, clst;
1433  FATFS *fs = dp->obj.fs;
1434 
1435 
1436  if (ofs >= (DWORD)((_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) { /* Check range of offset and alignment */
1437  return FR_INT_ERR;
1438  }
1439  dp->dptr = ofs; /* Set current offset */
1440  clst = dp->obj.sclust; /* Table start cluster (0:root) */
1441  if (clst == 0 && fs->fs_type >= FS_FAT32) { /* Replace cluster# 0 with root cluster# */
1442  clst = fs->dirbase;
1443  if (_FS_EXFAT) dp->obj.stat = 0; /* exFAT: Root dir has an FAT chain */
1444  }
1445 
1446  if (clst == 0) { /* Static table (root-directory in FAT12/16) */
1447  if (ofs / SZDIRE >= fs->n_rootdir) return FR_INT_ERR; /* Is index out of range? */
1448  dp->sect = fs->dirbase;
1449 
1450  } else { /* Dynamic table (sub-directory or root-directory in FAT32+) */
1451  csz = (DWORD)fs->csize * SS(fs); /* Bytes per cluster */
1452  while (ofs >= csz) { /* Follow cluster chain */
1453  clst = get_fat(&dp->obj, clst); /* Get next cluster */
1454  if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1455  if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Reached to end of table or internal error */
1456  ofs -= csz;
1457  }
1458  dp->sect = clust2sect(fs, clst);
1459  }
1460  dp->clust = clst; /* Current cluster# */
1461  if (!dp->sect) return FR_INT_ERR;
1462  dp->sect += ofs / SS(fs); /* Sector# of the directory entry */
1463  dp->dir = fs->win + (ofs % SS(fs)); /* Pointer to the entry in the win[] */
1464 
1465  return FR_OK;
1466 }
1467 
1468 
1469 
1470 
1471 /*-----------------------------------------------------------------------*/
1472 /* Directory handling - Move directory table index next */
1473 /*-----------------------------------------------------------------------*/
1474 
1475 static
1476 FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
1477  DIR* dp, /* Pointer to the directory object */
1478  int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
1479 )
1480 {
1481  DWORD ofs, clst;
1482  FATFS *fs = dp->obj.fs;
1483 #if !_FS_READONLY
1484  UINT n;
1485 #endif
1486 
1487  ofs = dp->dptr + SZDIRE; /* Next entry */
1488  if (!dp->sect || ofs >= (DWORD)((_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR)) return FR_NO_FILE; /* Report EOT when offset has reached max value */
1489 
1490  if (ofs % SS(fs) == 0) { /* Sector changed? */
1491  dp->sect++; /* Next sector */
1492 
1493  if (!dp->clust) { /* Static table */
1494  if (ofs / SZDIRE >= fs->n_rootdir) { /* Report EOT if it reached end of static table */
1495  dp->sect = 0; return FR_NO_FILE;
1496  }
1497  }
1498  else { /* Dynamic table */
1499  if ((ofs / SS(fs) & (fs->csize - 1)) == 0) { /* Cluster changed? */
1500  clst = get_fat(&dp->obj, dp->clust); /* Get next cluster */
1501  if (clst <= 1) return FR_INT_ERR; /* Internal error */
1502  if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1503  if (clst >= fs->n_fatent) { /* Reached end of dynamic table */
1504 #if !_FS_READONLY
1505  if (!stretch) { /* If no stretch, report EOT */
1506  dp->sect = 0; return FR_NO_FILE;
1507  }
1508  clst = create_chain(&dp->obj, dp->clust); /* Allocate a cluster */
1509  if (clst == 0) return FR_DENIED; /* No free cluster */
1510  if (clst == 1) return FR_INT_ERR; /* Internal error */
1511  if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1512  /* Clean-up the stretched table */
1513  if (_FS_EXFAT) dp->obj.stat |= 4; /* The directory needs to be updated */
1514  if (sync_window(fs) != FR_OK) return FR_DISK_ERR; /* Flush disk access window */
1515  mem_set(fs->win, 0, SS(fs)); /* Clear window buffer */
1516  for (n = 0, fs->winsect = clust2sect(fs, clst); n < fs->csize; n++, fs->winsect++) { /* Fill the new cluster with 0 */
1517  fs->wflag = 1;
1518  if (sync_window(fs) != FR_OK) return FR_DISK_ERR;
1519  }
1520  fs->winsect -= n; /* Restore window offset */
1521 #else
1522  if (!stretch) dp->sect = 0; /* If no stretch, report EOT (this is to suppress warning) */
1523  dp->sect = 0; return FR_NO_FILE; /* Report EOT */
1524 #endif
1525  }
1526  dp->clust = clst; /* Initialize data for new cluster */
1527  dp->sect = clust2sect(fs, clst);
1528  }
1529  }
1530  }
1531  dp->dptr = ofs; /* Current entry */
1532  dp->dir = fs->win + ofs % SS(fs); /* Pointer to the entry in the win[] */
1533 
1534  return FR_OK;
1535 }
1536 
1537 
1538 
1539 
1540 #if !_FS_READONLY
1541 /*-----------------------------------------------------------------------*/
1542 /* Directory handling - Reserve a block of directory entries */
1543 /*-----------------------------------------------------------------------*/
1544 
1545 static
1546 FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */
1547  DIR* dp, /* Pointer to the directory object */
1548  UINT nent /* Number of contiguous entries to allocate */
1549 )
1550 {
1551  FRESULT res;
1552  UINT n;
1553  FATFS *fs = dp->obj.fs;
1554 
1555 
1556  res = dir_sdi(dp, 0);
1557  if (res == FR_OK) {
1558  n = 0;
1559  do {
1560  res = move_window(fs, dp->sect);
1561  if (res != FR_OK) break;
1562 #if _FS_EXFAT
1563  if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) {
1564 #else
1565  if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) {
1566 #endif
1567  if (++n == nent) break; /* A block of contiguous free entries is found */
1568  } else {
1569  n = 0; /* Not a blank entry. Restart to search */
1570  }
1571  res = dir_next(dp, 1);
1572  } while (res == FR_OK); /* Next entry with table stretch enabled */
1573  }
1574 
1575  if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
1576  return res;
1577 }
1578 
1579 #endif /* !_FS_READONLY */
1580 
1581 
1582 
1583 
1584 /*-----------------------------------------------------------------------*/
1585 /* FAT: Directory handling - Load/Store start cluster number */
1586 /*-----------------------------------------------------------------------*/
1587 
1588 static
1589 DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */
1590  FATFS* fs, /* Pointer to the fs object */
1591  const BYTE* dir /* Pointer to the key entry */
1592 )
1593 {
1594  DWORD cl;
1595 
1596  cl = ld_word(dir + DIR_FstClusLO);
1597  if (fs->fs_type == FS_FAT32) {
1598  cl |= (DWORD)ld_word(dir + DIR_FstClusHI) << 16;
1599  }
1600 
1601  return cl;
1602 }
1603 
1604 
1605 #if !_FS_READONLY
1606 static
1607 void st_clust (
1608  FATFS* fs, /* Pointer to the fs object */
1609  BYTE* dir, /* Pointer to the key entry */
1610  DWORD cl /* Value to be set */
1611 )
1612 {
1613  st_word(dir + DIR_FstClusLO, (WORD)cl);
1614  if (fs->fs_type == FS_FAT32) {
1615  st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16));
1616  }
1617 }
1618 #endif
1619 
1620 
1621 
1622 #if _USE_LFN != 0
1623 /*------------------------------------------------------------------------*/
1624 /* FAT-LFN: LFN handling */
1625 /*------------------------------------------------------------------------*/
1626 static
1627 const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN characters in the directory entry */
1628 
1629 
1630 /*--------------------------------------------------------*/
1631 /* FAT-LFN: Compare a part of file name with an LFN entry */
1632 /*--------------------------------------------------------*/
1633 static
1634 int cmp_lfn ( /* 1:matched, 0:not matched */
1635  const WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */
1636  BYTE* dir /* Pointer to the directory entry containing the part of LFN */
1637 )
1638 {
1639  UINT i, s;
1640  WCHAR wc, uc;
1641 
1642 
1643  if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
1644 
1645  i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1646 
1647  for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1648  uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */
1649  if (wc) {
1650  if (i >= _MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) { /* Compare it */
1651  return 0; /* Not matched */
1652  }
1653  wc = uc;
1654  } else {
1655  if (uc != 0xFFFF) return 0; /* Check filler */
1656  }
1657  }
1658 
1659  if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) return 0; /* Last segment matched but different length */
1660 
1661  return 1; /* The part of LFN matched */
1662 }
1663 
1664 
1665 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 || _USE_LABEL || _FS_EXFAT
1666 /*-----------------------------------------------------*/
1667 /* FAT-LFN: Pick a part of file name from an LFN entry */
1668 /*-----------------------------------------------------*/
1669 static
1670 int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */
1671  WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
1672  BYTE* dir /* Pointer to the LFN entry */
1673 )
1674 {
1675  UINT i, s;
1676  WCHAR wc, uc;
1677 
1678 
1679  if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
1680 
1681  i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1682 
1683  for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1684  uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */
1685  if (wc) {
1686  if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
1687  lfnbuf[i++] = wc = uc; /* Store it */
1688  } else {
1689  if (uc != 0xFFFF) return 0; /* Check filler */
1690  }
1691  }
1692 
1693  if (dir[LDIR_Ord] & LLEF) { /* Put terminator if it is the last LFN part */
1694  if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
1695  lfnbuf[i] = 0;
1696  }
1697 
1698  return 1; /* The part of LFN is valid */
1699 }
1700 #endif
1701 
1702 
1703 #if !_FS_READONLY
1704 /*-----------------------------------------*/
1705 /* FAT-LFN: Create an entry of LFN entries */
1706 /*-----------------------------------------*/
1707 static
1708 void put_lfn (
1709  const WCHAR* lfn, /* Pointer to the LFN */
1710  BYTE* dir, /* Pointer to the LFN entry to be created */
1711  BYTE ord, /* LFN order (1-20) */
1712  BYTE sum /* Checksum of the corresponding SFN */
1713 )
1714 {
1715  UINT i, s;
1716  WCHAR wc;
1717 
1718 
1719  dir[LDIR_Chksum] = sum; /* Set checksum */
1720  dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
1721  dir[LDIR_Type] = 0;
1722  st_word(dir + LDIR_FstClusLO, 0);
1723 
1724  i = (ord - 1) * 13; /* Get offset in the LFN working buffer */
1725  s = wc = 0;
1726  do {
1727  if (wc != 0xFFFF) wc = lfn[i++]; /* Get an effective character */
1728  st_word(dir + LfnOfs[s], wc); /* Put it */
1729  if (wc == 0) wc = 0xFFFF; /* Padding characters for left locations */
1730  } while (++s < 13);
1731  if (wc == 0xFFFF || !lfn[i]) ord |= LLEF; /* Last LFN part is the start of LFN sequence */
1732  dir[LDIR_Ord] = ord; /* Set the LFN order */
1733 }
1734 
1735 #endif /* !_FS_READONLY */
1736 #endif /* _USE_LFN != 0 */
1737 
1738 
1739 
1740 #if _USE_LFN != 0 && !_FS_READONLY
1741 /*-----------------------------------------------------------------------*/
1742 /* FAT-LFN: Create a Numbered SFN */
1743 /*-----------------------------------------------------------------------*/
1744 
1745 static
1746 void gen_numname (
1747  BYTE* dst, /* Pointer to the buffer to store numbered SFN */
1748  const BYTE* src, /* Pointer to SFN */
1749  const WCHAR* lfn, /* Pointer to LFN */
1750  UINT seq /* Sequence number */
1751 )
1752 {
1753  BYTE ns[8], c;
1754  UINT i, j;
1755  WCHAR wc;
1756  DWORD sr;
1757 
1758 
1759  mem_cpy(dst, src, 11);
1760 
1761  if (seq > 5) { /* In case of many collisions, generate a hash number instead of sequential number */
1762  sr = seq;
1763  while (*lfn) { /* Create a CRC */
1764  wc = *lfn++;
1765  for (i = 0; i < 16; i++) {
1766  sr = (sr << 1) + (wc & 1);
1767  wc >>= 1;
1768  if (sr & 0x10000) sr ^= 0x11021;
1769  }
1770  }
1771  seq = (UINT)sr;
1772  }
1773 
1774  /* itoa (hexdecimal) */
1775  i = 7;
1776  do {
1777  c = (BYTE)((seq % 16) + '0');
1778  if (c > '9') c += 7;
1779  ns[i--] = c;
1780  seq /= 16;
1781  } while (seq);
1782  ns[i] = '~';
1783 
1784  /* Append the number */
1785  for (j = 0; j < i && dst[j] != ' '; j++) {
1786  if (IsDBCS1(dst[j])) {
1787  if (j == i - 1) break;
1788  j++;
1789  }
1790  }
1791  do {
1792  dst[j++] = (i < 8) ? ns[i++] : ' ';
1793  } while (j < 8);
1794 }
1795 #endif /* _USE_LFN != 0 && !_FS_READONLY */
1796 
1797 
1798 
1799 #if _USE_LFN != 0
1800 /*-----------------------------------------------------------------------*/
1801 /* FAT-LFN: Calculate checksum of an SFN entry */
1802 /*-----------------------------------------------------------------------*/
1803 
1804 static
1805 BYTE sum_sfn (
1806  const BYTE* dir /* Pointer to the SFN entry */
1807 )
1808 {
1809  BYTE sum = 0;
1810  UINT n = 11;
1811 
1812  do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
1813  return sum;
1814 }
1815 
1816 #endif /* _USE_LFN != 0 */
1817 
1818 
1819 
1820 #if _FS_EXFAT
1821 /*-----------------------------------------------------------------------*/
1822 /* exFAT: Checksum */
1823 /*-----------------------------------------------------------------------*/
1824 
1825 static
1826 WORD xdir_sum ( /* Get checksum of the directoly block */
1827  const BYTE* dir /* Directory entry block to be calculated */
1828 )
1829 {
1830  UINT i, szblk;
1831  WORD sum;
1832 
1833 
1834  szblk = (dir[XDIR_NumSec] + 1) * SZDIRE;
1835  for (i = sum = 0; i < szblk; i++) {
1836  if (i == XDIR_SetSum) { /* Skip sum field */
1837  i++;
1838  } else {
1839  sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i];
1840  }
1841  }
1842  return sum;
1843 }
1844 
1845 
1846 
1847 static
1848 WORD xname_sum ( /* Get check sum (to be used as hash) of the name */
1849  const WCHAR* name /* File name to be calculated */
1850 )
1851 {
1852  WCHAR chr;
1853  WORD sum = 0;
1854 
1855 
1856  while ((chr = *name++) != 0) {
1857  chr = ff_wtoupper(chr); /* File name needs to be ignored case */
1858  sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF);
1859  sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8);
1860  }
1861  return sum;
1862 }
1863 
1864 
1865 #if !_FS_READONLY && _USE_MKFS
1866 static
1867 DWORD xsum32 (
1868  BYTE dat, /* Data to be sumed */
1869  DWORD sum /* Previous value */
1870 )
1871 {
1872  sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat;
1873  return sum;
1874 }
1875 #endif
1876 
1877 
1878 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2
1879 /*------------------------------------------------------*/
1880 /* exFAT: Get object information from a directory block */
1881 /*------------------------------------------------------*/
1882 
1883 static
1884 void get_xdir_info (
1885  BYTE* dirb, /* Pointer to the direcotry entry block 85+C0+C1s */
1886  FILINFO* fno /* Buffer to store the extracted file information */
1887 )
1888 {
1889  UINT di, si;
1890  WCHAR w;
1891 #if !_LFN_UNICODE
1892  UINT nc;
1893 #endif
1894 
1895  /* Get file name */
1896 #if _LFN_UNICODE
1897  if (dirb[XDIR_NumName] <= _MAX_LFN) {
1898  for (si = SZDIRE * 2, di = 0; di < dirb[XDIR_NumName]; si += 2, di++) {
1899  if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */
1900  w = ld_word(dirb + si); /* Get a character */
1901  fno->fname[di] = w; /* Store it */
1902  }
1903  } else {
1904  di = 0; /* Buffer overflow and inaccessible object */
1905  }
1906 #else
1907  for (si = SZDIRE * 2, di = nc = 0; nc < dirb[XDIR_NumName]; si += 2, nc++) {
1908  if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */
1909  w = ld_word(dirb + si); /* Get a character */
1910  w = ff_convert(w, 0); /* Unicode -> OEM */
1911  if (w == 0) { di = 0; break; } /* Could not be converted and inaccessible object */
1912  if (_DF1S && w >= 0x100) { /* Put 1st byte if it is a DBC (always false at SBCS cfg) */
1913  fno->fname[di++] = (char)(w >> 8);
1914  }
1915  if (di >= _MAX_LFN) { di = 0; break; } /* Buffer overflow and inaccessible object */
1916  fno->fname[di++] = (char)w;
1917  }
1918 #endif
1919  if (di == 0) fno->fname[di++] = '?'; /* Inaccessible object? */
1920  fno->fname[di] = 0; /* Terminate file name */
1921 
1922  fno->altname[0] = 0; /* No SFN */
1923  fno->fattrib = dirb[XDIR_Attr]; /* Attribute */
1924  fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(dirb + XDIR_FileSize); /* Size */
1925  fno->ftime = ld_word(dirb + XDIR_ModTime + 0); /* Time */
1926  fno->fdate = ld_word(dirb + XDIR_ModTime + 2); /* Date */
1927 }
1928 
1929 #endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */
1930 
1931 
1932 /*-----------------------------------*/
1933 /* exFAT: Get a directry entry block */
1934 /*-----------------------------------*/
1935 
1936 static
1937 FRESULT load_xdir ( /* FR_INT_ERR: invalid entry block */
1938  DIR* dp /* Pointer to the reading direcotry object pointing the 85 entry */
1939 )
1940 {
1941  FRESULT res;
1942  UINT i, nent;
1943  BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the on-memory direcotry entry block 85+C0+C1s */
1944 
1945 
1946  /* Load 85 entry */
1947  res = move_window(dp->obj.fs, dp->sect);
1948  if (res != FR_OK) return res;
1949  if (dp->dir[XDIR_Type] != 0x85) return FR_INT_ERR;
1950  mem_cpy(dirb, dp->dir, SZDIRE);
1951  nent = dirb[XDIR_NumSec] + 1;
1952 
1953  /* Load C0 entry */
1954  res = dir_next(dp, 0);
1955  if (res != FR_OK) return res;
1956  res = move_window(dp->obj.fs, dp->sect);
1957  if (res != FR_OK) return res;
1958  if (dp->dir[XDIR_Type] != 0xC0) return FR_INT_ERR;
1959  mem_cpy(dirb + SZDIRE, dp->dir, SZDIRE);
1960 
1961  /* Load C1 entries */
1962  if (nent < 3 || nent > 19) return FR_NO_FILE;
1963  i = SZDIRE * 2; nent *= SZDIRE;
1964  do {
1965  res = dir_next(dp, 0);
1966  if (res != FR_OK) return res;
1967  res = move_window(dp->obj.fs, dp->sect);
1968  if (res != FR_OK) return res;
1969  if (dp->dir[XDIR_Type] != 0xC1) return FR_INT_ERR;
1970  mem_cpy(dirb + i, dp->dir, SZDIRE);
1971  i += SZDIRE;
1972  } while (i < nent);
1973 
1974  /* Sanity check */
1975  if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR;
1976 
1977  return FR_OK;
1978 }
1979 
1980 
1981 #if !_FS_READONLY || _FS_RPATH != 0
1982 /*------------------------------------------------*/
1983 /* exFAT: Load the object's directory entry block */
1984 /*------------------------------------------------*/
1985 static
1986 FRESULT load_obj_dir (
1987  DIR* dp, /* Blank directory object to be used to access containing direcotry */
1988  const _FDID* obj /* Object with containing directory information */
1989 )
1990 {
1991  FRESULT res;
1992 
1993 
1994  /* Open object containing directory */
1995  dp->obj.fs = obj->fs;
1996  dp->obj.sclust = obj->c_scl;
1997  dp->obj.stat = (BYTE)obj->c_size;
1998  dp->obj.objsize = obj->c_size & 0xFFFFFF00;
1999  dp->blk_ofs = obj->c_ofs;
2000 
2001  res = dir_sdi(dp, dp->blk_ofs); /* Goto the block location */
2002  if (res == FR_OK) {
2003  res = load_xdir(dp); /* Load the object's entry block */
2004  }
2005  return res;
2006 }
2007 #endif
2008 
2009 
2010 #if !_FS_READONLY
2011 /*-----------------------------------------------*/
2012 /* exFAT: Store the directory block to the media */
2013 /*-----------------------------------------------*/
2014 static
2015 FRESULT store_xdir (
2016  DIR* dp /* Pointer to the direcotry object */
2017 )
2018 {
2019  FRESULT res;
2020  UINT nent;
2021  BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the direcotry entry block 85+C0+C1s */
2022 
2023  /* Create set sum */
2024  st_word(dirb + XDIR_SetSum, xdir_sum(dirb));
2025  nent = dirb[XDIR_NumSec] + 1;
2026 
2027  /* Store the set of directory to the volume */
2028  res = dir_sdi(dp, dp->blk_ofs);
2029  while (res == FR_OK) {
2030  res = move_window(dp->obj.fs, dp->sect);
2031  if (res != FR_OK) break;
2032  mem_cpy(dp->dir, dirb, SZDIRE);
2033  dp->obj.fs->wflag = 1;
2034  if (--nent == 0) break;
2035  dirb += SZDIRE;
2036  res = dir_next(dp, 0);
2037  }
2038  return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR;
2039 }
2040 
2041 
2042 
2043 /*-------------------------------------------*/
2044 /* exFAT: Create a new directory enrty block */
2045 /*-------------------------------------------*/
2046 
2047 static
2048 void create_xdir (
2049  BYTE* dirb, /* Pointer to the direcotry entry block buffer */
2050  const WCHAR* lfn /* Pointer to the nul terminated file name */
2051 )
2052 {
2053  UINT i;
2054  BYTE nb, nc;
2055  WCHAR chr;
2056 
2057 
2058  mem_set(dirb, 0, 2 * SZDIRE); /* Initialize 85+C0 entry */
2059  dirb[XDIR_Type] = 0x85;
2060  dirb[XDIR_Type + SZDIRE] = 0xC0;
2061  st_word(dirb + XDIR_NameHash, xname_sum(lfn)); /* Set name hash */
2062 
2063  i = SZDIRE * 2; /* C1 offset */
2064  nc = 0; nb = 1; chr = 1;
2065  do {
2066  dirb[i++] = 0xC1; dirb[i++] = 0; /* Entry type C1 */
2067  do { /* Fill name field */
2068  if (chr && (chr = lfn[nc]) != 0) nc++; /* Get a character if exist */
2069  st_word(dirb + i, chr); i += 2; /* Store it */
2070  } while (i % SZDIRE);
2071  nb++;
2072  } while (lfn[nc]); /* Fill next entry if any char follows */
2073 
2074  dirb[XDIR_NumName] = nc; /* Set name length */
2075  dirb[XDIR_NumSec] = nb; /* Set number of C0+C1s */
2076 }
2077 
2078 #endif /* !_FS_READONLY */
2079 #endif /* _FS_EXFAT */
2080 
2081 
2082 
2083 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 || _USE_LABEL || _FS_EXFAT
2084 /*-----------------------------------------------------------------------*/
2085 /* Read an object from the directory */
2086 /*-----------------------------------------------------------------------*/
2087 
2088 static
2089 FRESULT dir_read (
2090  DIR* dp, /* Pointer to the directory object */
2091  int vol /* Filtered by 0:file/directory or 1:volume label */
2092 )
2093 {
2094  FRESULT res = FR_NO_FILE;
2095  FATFS *fs = dp->obj.fs;
2096  BYTE a, c;
2097 #if _USE_LFN != 0
2098  BYTE ord = 0xFF, sum = 0xFF;
2099 #endif
2100 
2101  while (dp->sect) {
2102  res = move_window(fs, dp->sect);
2103  if (res != FR_OK) break;
2104  c = dp->dir[DIR_Name]; /* Test for the entry type */
2105  if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of the directory */
2106 #if _FS_EXFAT
2107  if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2108  if (_USE_LABEL && vol) {
2109  if (c == 0x83) break; /* Volume label entry? */
2110  } else {
2111  if (c == 0x85) { /* Start of the file entry block? */
2112  dp->blk_ofs = dp->dptr; /* Get location of the block */
2113  res = load_xdir(dp); /* Load the entry block */
2114  if (res == FR_OK) {
2115  dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK; /* Get attribute */
2116  }
2117  break;
2118  }
2119  }
2120  } else
2121 #endif
2122  { /* On the FAT12/16/32 volume */
2123  dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK; /* Get attribute */
2124 #if _USE_LFN != 0 /* LFN configuration */
2125  if (c == DDEM || c == '.' || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */
2126  ord = 0xFF;
2127  } else {
2128  if (a == AM_LFN) { /* An LFN entry is found */
2129  if (c & LLEF) { /* Is it start of an LFN sequence? */
2130  sum = dp->dir[LDIR_Chksum];
2131  c &= (BYTE)~LLEF; ord = c;
2132  dp->blk_ofs = dp->dptr;
2133  }
2134  /* Check LFN validity and capture it */
2135  ord = (c == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
2136  } else { /* An SFN entry is found */
2137  if (ord || sum != sum_sfn(dp->dir)) { /* Is there a valid LFN? */
2138  dp->blk_ofs = 0xFFFFFFFF; /* It has no LFN. */
2139  }
2140  break;
2141  }
2142  }
2143 #else /* Non LFN configuration */
2144  if (c != DDEM && c != '.' && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) { /* Is it a valid entry? */
2145  break;
2146  }
2147 #endif
2148  }
2149  res = dir_next(dp, 0); /* Next entry */
2150  if (res != FR_OK) break;
2151  }
2152 
2153  if (res != FR_OK) dp->sect = 0; /* Terminate the read operation on error or EOT */
2154  return res;
2155 }
2156 
2157 #endif /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */
2158 
2159 
2160 
2161 /*-----------------------------------------------------------------------*/
2162 /* Directory handling - Find an object in the directory */
2163 /*-----------------------------------------------------------------------*/
2164 
2165 static
2166 FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */
2167  DIR* dp /* Pointer to the directory object with the file name */
2168 )
2169 {
2170  FRESULT res;
2171  FATFS *fs = dp->obj.fs;
2172  BYTE c;
2173 #if _USE_LFN != 0
2174  BYTE a, ord, sum;
2175 #endif
2176 
2177  res = dir_sdi(dp, 0); /* Rewind directory object */
2178  if (res != FR_OK) return res;
2179 #if _FS_EXFAT
2180  if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2181  BYTE nc;
2182  UINT di, ni;
2183  WORD hash = xname_sum(fs->lfnbuf); /* Hash value of the name to find */
2184 
2185  while ((res = dir_read(dp, 0)) == FR_OK) { /* Read an item */
2186  if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue; /* Skip the comparison if hash value mismatched */
2187  for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) { /* Compare the name */
2188  if ((di % SZDIRE) == 0) di += 2;
2189  if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break;
2190  }
2191  if (nc == 0 && !fs->lfnbuf[ni]) break; /* Name matched? */
2192  }
2193  return res;
2194  }
2195 #endif
2196  /* On the FAT12/16/32 volume */
2197 #if _USE_LFN != 0
2198  ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2199 #endif
2200  do {
2201  res = move_window(fs, dp->sect);
2202  if (res != FR_OK) break;
2203  c = dp->dir[DIR_Name];
2204  if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
2205 #if _USE_LFN != 0 /* LFN configuration */
2206  dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK;
2207  if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
2208  ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2209  } else {
2210  if (a == AM_LFN) { /* An LFN entry is found */
2211  if (!(dp->fn[NSFLAG] & NS_NOLFN)) {
2212  if (c & LLEF) { /* Is it start of LFN sequence? */
2213  sum = dp->dir[LDIR_Chksum];
2214  c &= (BYTE)~LLEF; ord = c; /* LFN start order */
2215  dp->blk_ofs = dp->dptr; /* Start offset of LFN */
2216  }
2217  /* Check validity of the LFN entry and compare it with given name */
2218  ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
2219  }
2220  } else { /* An SFN entry is found */
2221  if (!ord && sum == sum_sfn(dp->dir)) break; /* LFN matched? */
2222  if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* SFN matched? */
2223  ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2224  }
2225  }
2226 #else /* Non LFN configuration */
2227  dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK;
2228  if (!(dp->dir[DIR_Attr] & AM_VOL) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* Is it a valid entry? */
2229 #endif
2230  res = dir_next(dp, 0); /* Next entry */
2231  } while (res == FR_OK);
2232 
2233  return res;
2234 }
2235 
2236 
2237 
2238 
2239 #if !_FS_READONLY
2240 /*-----------------------------------------------------------------------*/
2241 /* Register an object to the directory */
2242 /*-----------------------------------------------------------------------*/
2243 
2244 static
2245 FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */
2246  DIR* dp /* Target directory with object name to be created */
2247 )
2248 {
2249  FRESULT res;
2250  FATFS *fs = dp->obj.fs;
2251 #if _USE_LFN != 0 /* LFN configuration */
2252  UINT n, nlen, nent;
2253  BYTE sn[12], sum;
2254 
2255 
2256  if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME; /* Check name validity */
2257  for (nlen = 0; fs->lfnbuf[nlen]; nlen++) ; /* Get lfn length */
2258 
2259 #if _FS_EXFAT
2260  if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2261  DIR dj;
2262 
2263  nent = (nlen + 14) / 15 + 2; /* Number of entries to allocate (85+C0+C1s) */
2264  res = dir_alloc(dp, nent); /* Allocate entries */
2265  if (res != FR_OK) return res;
2266  dp->blk_ofs = dp->dptr - SZDIRE * (nent - 1); /* Set block position */
2267 
2268  if (dp->obj.sclust != 0 && (dp->obj.stat & 4)) { /* Has the sub-directory been stretched? */
2269  dp->obj.stat &= 3;
2270  dp->obj.objsize += (DWORD)fs->csize * SS(fs); /* Increase object size by cluster size */
2271  res = fill_fat_chain(&dp->obj); /* Complement FAT chain if needed */
2272  if (res != FR_OK) return res;
2273  res = load_obj_dir(&dj, &dp->obj);
2274  if (res != FR_OK) return res; /* Load the object status */
2275  st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize); /* Update the allocation status */
2276  st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize);
2277  fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1;
2278  res = store_xdir(&dj); /* Store the object status */
2279  if (res != FR_OK) return res;
2280  }
2281 
2282  create_xdir(fs->dirbuf, fs->lfnbuf); /* Create on-memory directory block to be written later */
2283  return FR_OK;
2284  }
2285 #endif
2286  /* On the FAT12/16/32 volume */
2287  mem_cpy(sn, dp->fn, 12);
2288  if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
2289  dp->fn[NSFLAG] = NS_NOLFN; /* Find only SFN */
2290  for (n = 1; n < 100; n++) {
2291  gen_numname(dp->fn, sn, fs->lfnbuf, n); /* Generate a numbered name */
2292  res = dir_find(dp); /* Check if the name collides with existing SFN */
2293  if (res != FR_OK) break;
2294  }
2295  if (n == 100) return FR_DENIED; /* Abort if too many collisions */
2296  if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
2297  dp->fn[NSFLAG] = sn[NSFLAG];
2298  }
2299 
2300  /* Create an SFN with/without LFNs. */
2301  nent = (sn[NSFLAG] & NS_LFN) ? (nlen + 12) / 13 + 1 : 1; /* Number of entries to allocate */
2302  res = dir_alloc(dp, nent); /* Allocate entries */
2303  if (res == FR_OK && --nent) { /* Set LFN entry if needed */
2304  res = dir_sdi(dp, dp->dptr - nent * SZDIRE);
2305  if (res == FR_OK) {
2306  sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */
2307  do { /* Store LFN entries in bottom first */
2308  res = move_window(fs, dp->sect);
2309  if (res != FR_OK) break;
2310  put_lfn(fs->lfnbuf, dp->dir, (BYTE)nent, sum);
2311  fs->wflag = 1;
2312  res = dir_next(dp, 0); /* Next entry */
2313  } while (res == FR_OK && --nent);
2314  }
2315  }
2316 
2317 #else /* Non LFN configuration */
2318  res = dir_alloc(dp, 1); /* Allocate an entry for SFN */
2319 
2320 #endif
2321 
2322  /* Set SFN entry */
2323  if (res == FR_OK) {
2324  res = move_window(fs, dp->sect);
2325  if (res == FR_OK) {
2326  mem_set(dp->dir, 0, SZDIRE); /* Clean the entry */
2327  mem_cpy(dp->dir + DIR_Name, dp->fn, 11); /* Put SFN */
2328 #if _USE_LFN != 0
2329  dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */
2330 #endif
2331  fs->wflag = 1;
2332  }
2333  }
2334 
2335  return res;
2336 }
2337 
2338 #endif /* !_FS_READONLY */
2339 
2340 
2341 
2342 #if !_FS_READONLY && _FS_MINIMIZE == 0
2343 /*-----------------------------------------------------------------------*/
2344 /* Remove an object from the directory */
2345 /*-----------------------------------------------------------------------*/
2346 
2347 static
2348 FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */
2349  DIR* dp /* Directory object pointing the entry to be removed */
2350 )
2351 {
2352  FRESULT res;
2353  FATFS *fs = dp->obj.fs;
2354 #if _USE_LFN != 0 /* LFN configuration */
2355  DWORD last = dp->dptr;
2356 
2357  res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs); /* Goto top of the entry block if LFN is exist */
2358  if (res == FR_OK) {
2359  do {
2360  res = move_window(fs, dp->sect);
2361  if (res != FR_OK) break;
2362  /* Mark an entry 'deleted' */
2363  if (_FS_EXFAT && fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2364  dp->dir[XDIR_Type] &= 0x7F;
2365  } else { /* On the FAT12/16/32 volume */
2366  dp->dir[DIR_Name] = DDEM;
2367  }
2368  fs->wflag = 1;
2369  if (dp->dptr >= last) break; /* If reached last entry then all entries of the object has been deleted. */
2370  res = dir_next(dp, 0); /* Next entry */
2371  } while (res == FR_OK);
2372  if (res == FR_NO_FILE) res = FR_INT_ERR;
2373  }
2374 #else /* Non LFN configuration */
2375 
2376  res = move_window(fs, dp->sect);
2377  if (res == FR_OK) {
2378  dp->dir[DIR_Name] = DDEM;
2379  fs->wflag = 1;
2380  }
2381 #endif
2382 
2383  return res;
2384 }
2385 
2386 #endif /* !_FS_READONLY && _FS_MINIMIZE == 0 */
2387 
2388 
2389 
2390 #if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2
2391 /*-----------------------------------------------------------------------*/
2392 /* Get file information from directory entry */
2393 /*-----------------------------------------------------------------------*/
2394 
2395 static
2396 void get_fileinfo ( /* No return code */
2397  DIR* dp, /* Pointer to the directory object */
2398  FILINFO* fno /* Pointer to the file information to be filled */
2399 )
2400 {
2401  UINT i, j;
2402  TCHAR c;
2403  DWORD tm;
2404 #if _USE_LFN != 0
2405  WCHAR w, lfv;
2406  FATFS *fs = dp->obj.fs;
2407 #endif
2408 
2409 
2410  fno->fname[0] = 0; /* Invaidate file info */
2411  if (!dp->sect) return; /* Exit if read pointer has reached end of directory */
2412 
2413 #if _USE_LFN != 0 /* LFN configuration */
2414 #if _FS_EXFAT
2415  if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2416  get_xdir_info(fs->dirbuf, fno);
2417  return;
2418  } else
2419 #endif
2420  { /* On the FAT12/16/32 volume */
2421  if (dp->blk_ofs != 0xFFFFFFFF) { /* Get LFN if available */
2422  i = j = 0;
2423  while ((w = fs->lfnbuf[j++]) != 0) { /* Get an LFN character */
2424 #if !_LFN_UNICODE
2425  w = ff_convert(w, 0); /* Unicode -> OEM */
2426  if (w == 0) { i = 0; break; } /* No LFN if it could not be converted */
2427  if (_DF1S && w >= 0x100) { /* Put 1st byte if it is a DBC (always false at SBCS cfg) */
2428  fno->fname[i++] = (char)(w >> 8);
2429  }
2430 #endif
2431  if (i >= _MAX_LFN) { i = 0; break; } /* No LFN if buffer overflow */
2432  fno->fname[i++] = (TCHAR)w;
2433  }
2434  fno->fname[i] = 0; /* Terminate the LFN */
2435  }
2436  }
2437 
2438  i = j = 0;
2439  lfv = fno->fname[i]; /* LFN is exist if non-zero */
2440  while (i < 11) { /* Copy name body and extension */
2441  c = (TCHAR)dp->dir[i++];
2442  if (c == ' ') continue; /* Skip padding spaces */
2443  if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */
2444  if (i == 9) { /* Insert a . if extension is exist */
2445  if (!lfv) fno->fname[j] = '.';
2446  fno->altname[j++] = '.';
2447  }
2448 #if _LFN_UNICODE
2449  if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dp->dir[i])) {
2450  c = c << 8 | dp->dir[i++];
2451  }
2452  c = ff_convert(c, 1); /* OEM -> Unicode */
2453  if (!c) c = '?';
2454 #endif
2455  fno->altname[j] = c;
2456  if (!lfv) {
2457  if (IsUpper(c) && (dp->dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY))) {
2458  c += 0x20; /* To lower */
2459  }
2460  fno->fname[j] = c;
2461  }
2462  j++;
2463  }
2464  if (!lfv) {
2465  fno->fname[j] = 0;
2466  if (!dp->dir[DIR_NTres]) j = 0; /* Altname is no longer needed if neither LFN nor case info is exist. */
2467  }
2468  fno->altname[j] = 0; /* Terminate the SFN */
2469 
2470 #else /* Non-LFN configuration */
2471  i = j = 0;
2472  while (i < 11) { /* Copy name body and extension */
2473  c = (TCHAR)dp->dir[i++];
2474  if (c == ' ') continue; /* Skip padding spaces */
2475  if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */
2476  if (i == 9) fno->fname[j++] = '.'; /* Insert a . if extension is exist */
2477  fno->fname[j++] = c;
2478  }
2479  fno->fname[j] = 0;
2480 #endif
2481 
2482  fno->fattrib = dp->dir[DIR_Attr]; /* Attribute */
2483  fno->fsize = ld_dword(dp->dir + DIR_FileSize); /* Size */
2484  tm = ld_dword(dp->dir + DIR_ModTime); /* Timestamp */
2485  fno->ftime = (WORD)tm; fno->fdate = (WORD)(tm >> 16);
2486 }
2487 
2488 #endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */
2489 
2490 
2491 
2492 #if _USE_FIND && _FS_MINIMIZE <= 1
2493 /*-----------------------------------------------------------------------*/
2494 /* Pattern matching */
2495 /*-----------------------------------------------------------------------*/
2496 
2497 static
2498 WCHAR get_achar ( /* Get a character and advances ptr 1 or 2 */
2499  const TCHAR** ptr /* Pointer to pointer to the SBCS/DBCS/Unicode string */
2500 )
2501 {
2502 #if !_LFN_UNICODE
2503  WCHAR chr;
2504 
2505  chr = (BYTE)*(*ptr)++; /* Get a byte */
2506  if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */
2507 #ifdef _EXCVT
2508  if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
2509 #else
2510  if (IsDBCS1(chr) && IsDBCS2(**ptr)) { /* Get DBC 2nd byte if needed */
2511  chr = chr << 8 | (BYTE)*(*ptr)++;
2512  }
2513 #endif
2514  return chr;
2515 #else
2516  return ff_wtoupper(*(*ptr)++); /* Get a word and to upper */
2517 #endif
2518 }
2519 
2520 
2521 static
2522 int pattern_matching ( /* 0:not matched, 1:matched */
2523  const TCHAR* pat, /* Matching pattern */
2524  const TCHAR* nam, /* String to be tested */
2525  int skip, /* Number of pre-skip chars (number of ?s) */
2526  int inf /* Infinite search (* specified) */
2527 )
2528 {
2529  const TCHAR *pp, *np;
2530  WCHAR pc, nc;
2531  int nm, nx;
2532 
2533 
2534  while (skip--) { /* Pre-skip name chars */
2535  if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */
2536  }
2537  if (!*pat && inf) return 1; /* (short circuit) */
2538 
2539  do {
2540  pp = pat; np = nam; /* Top of pattern and name to match */
2541  for (;;) {
2542  if (*pp == '?' || *pp == '*') { /* Wildcard? */
2543  nm = nx = 0;
2544  do { /* Analyze the wildcard chars */
2545  if (*pp++ == '?') nm++; else nx = 1;
2546  } while (*pp == '?' || *pp == '*');
2547  if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */
2548  nc = *np; break; /* Branch mismatched */
2549  }
2550  pc = get_achar(&pp); /* Get a pattern char */
2551  nc = get_achar(&np); /* Get a name char */
2552  if (pc != nc) break; /* Branch mismatched? */
2553  if (pc == 0) return 1; /* Branch matched? (matched at end of both strings) */
2554  }
2555  get_achar(&nam); /* nam++ */
2556  } while (inf && nc); /* Retry until end of name if infinite search is specified */
2557 
2558  return 0;
2559 }
2560 
2561 #endif /* _USE_FIND && _FS_MINIMIZE <= 1 */
2562 
2563 
2564 
2565 /*-----------------------------------------------------------------------*/
2566 /* Pick a top segment and create the object name in directory form */
2567 /*-----------------------------------------------------------------------*/
2568 
2569 static
2570 FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */
2571  DIR* dp, /* Pointer to the directory object */
2572  const TCHAR** path /* Pointer to pointer to the segment in the path string */
2573 )
2574 {
2575 #if _USE_LFN != 0 /* LFN configuration */
2576  BYTE b, cf;
2577  WCHAR w, *lfn;
2578  UINT i, ni, si, di;
2579  const TCHAR *p;
2580 
2581  /* Create LFN in Unicode */
2582  p = *path; lfn = dp->obj.fs->lfnbuf; si = di = 0;
2583  for (;;) {
2584  w = p[si++]; /* Get a character */
2585  if (w < ' ') break; /* Break if end of the path name */
2586  if (w == '/' || w == '\\') { /* Break if a separator is found */
2587  while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */
2588  break;
2589  }
2590  if (di >= _MAX_LFN) return FR_INVALID_NAME; /* Reject too long name */
2591 #if !_LFN_UNICODE
2592  w &= 0xFF;
2593  if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
2594  b = (BYTE)p[si++]; /* Get 2nd byte */
2595  w = (w << 8) + b; /* Create a DBC */
2596  if (!IsDBCS2(b)) return FR_INVALID_NAME; /* Reject invalid sequence */
2597  }
2598  w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */
2599  if (!w) return FR_INVALID_NAME; /* Reject invalid code */
2600 #endif
2601  if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) return FR_INVALID_NAME; /* Reject illegal characters for LFN */
2602  lfn[di++] = w; /* Store the Unicode character */
2603  }
2604  *path = &p[si]; /* Return pointer to the next segment */
2605  cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */
2606 #if _FS_RPATH != 0
2607  if ((di == 1 && lfn[di - 1] == '.') ||
2608  (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot name? */
2609  lfn[di] = 0;
2610  for (i = 0; i < 11; i++) /* Create dot name for SFN entry */
2611  dp->fn[i] = (i < di) ? '.' : ' ';
2612  dp->fn[i] = cf | NS_DOT; /* This is a dot entry */
2613  return FR_OK;
2614  }
2615 #endif
2616  while (di) { /* Snip off trailing spaces and dots if exist */
2617  w = lfn[di - 1];
2618  if (w != ' ' && w != '.') break;
2619  di--;
2620  }
2621  lfn[di] = 0; /* LFN is created */
2622  if (di == 0) return FR_INVALID_NAME; /* Reject nul name */
2623 
2624  /* Create SFN in directory form */
2625  mem_set(dp->fn, ' ', 11);
2626  for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
2627  if (si) cf |= NS_LOSS | NS_LFN;
2628  while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
2629 
2630  i = b = 0; ni = 8;
2631  for (;;) {
2632  w = lfn[si++]; /* Get an LFN character */
2633  if (!w) break; /* Break on end of the LFN */
2634  if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
2635  cf |= NS_LOSS | NS_LFN; continue;
2636  }
2637 
2638  if (i >= ni || si == di) { /* Extension or end of SFN */
2639  if (ni == 11) { /* Long extension */
2640  cf |= NS_LOSS | NS_LFN; break;
2641  }
2642  if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
2643  if (si > di) break; /* No extension */
2644  si = di; i = 8; ni = 11; /* Enter extension section */
2645  b <<= 2; continue;
2646  }
2647 
2648  if (w >= 0x80) { /* Non ASCII character */
2649 #ifdef _EXCVT
2650  w = ff_convert(w, 0); /* Unicode -> OEM code */
2651  if (w) w = ExCvt[w - 0x80]; /* Convert extended character to upper (SBCS) */
2652 #else
2653  w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
2654 #endif
2655  cf |= NS_LFN; /* Force create LFN entry */
2656  }
2657 
2658  if (_DF1S && w >= 0x100) { /* Is this DBC? (always false at SBCS cfg) */
2659  if (i >= ni - 1) {
2660  cf |= NS_LOSS | NS_LFN; i = ni; continue;
2661  }
2662  dp->fn[i++] = (BYTE)(w >> 8);
2663  } else { /* SBC */
2664  if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */
2665  w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
2666  } else {
2667  if (IsUpper(w)) { /* ASCII large capital */
2668  b |= 2;
2669  } else {
2670  if (IsLower(w)) { /* ASCII small capital */
2671  b |= 1; w -= 0x20;
2672  }
2673  }
2674  }
2675  }
2676  dp->fn[i++] = (BYTE)w;
2677  }
2678 
2679  if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
2680 
2681  if (ni == 8) b <<= 2;
2682  if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN; /* Create LFN entry when there are composite capitals */
2683  if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */
2684  if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
2685  if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
2686  }
2687 
2688  dp->fn[NSFLAG] = cf; /* SFN is created */
2689 
2690  return FR_OK;
2691 
2692 
2693 #else /* _USE_LFN != 0 : Non-LFN configuration */
2694  BYTE c, d, *sfn;
2695  UINT ni, si, i;
2696  const char *p;
2697 
2698  /* Create file name in directory form */
2699  p = *path; sfn = dp->fn;
2700  mem_set(sfn, ' ', 11);
2701  si = i = 0; ni = 8;
2702 #if _FS_RPATH != 0
2703  if (p[si] == '.') { /* Is this a dot entry? */
2704  for (;;) {
2705  c = (BYTE)p[si++];
2706  if (c != '.' || si >= 3) break;
2707  sfn[i++] = c;
2708  }
2709  if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
2710  *path = p + si; /* Return pointer to the next segment */
2711  sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of the path */
2712  return FR_OK;
2713  }
2714 #endif
2715  for (;;) {
2716  c = (BYTE)p[si++];
2717  if (c <= ' ') break; /* Break if end of the path name */
2718  if (c == '/' || c == '\\') { /* Break if a separator is found */
2719  while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */
2720  break;
2721  }
2722  if (c == '.' || i >= ni) { /* End of body or over size? */
2723  if (ni == 11 || c != '.') return FR_INVALID_NAME; /* Over size or invalid dot */
2724  i = 8; ni = 11; /* Goto extension */
2725  continue;
2726  }
2727  if (c >= 0x80) { /* Extended character? */
2728 #ifdef _EXCVT
2729  c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */
2730 #else
2731 #if !_DF1S
2732  return FR_INVALID_NAME; /* Reject extended characters (ASCII only cfg) */
2733 #endif
2734 #endif
2735  }
2736  if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false at SBCS cfg.) */
2737  d = (BYTE)p[si++]; /* Get 2nd byte */
2738  if (!IsDBCS2(d) || i >= ni - 1) return FR_INVALID_NAME; /* Reject invalid DBC */
2739  sfn[i++] = c;
2740  sfn[i++] = d;
2741  } else { /* SBC */
2742  if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) return FR_INVALID_NAME; /* Reject illegal chrs for SFN */
2743  if (IsLower(c)) c -= 0x20; /* To upper */
2744  sfn[i++] = c;
2745  }
2746  }
2747  *path = p + si; /* Return pointer to the next segment */
2748  if (i == 0) return FR_INVALID_NAME; /* Reject nul string */
2749 
2750  if (sfn[0] == DDEM) sfn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
2751  sfn[NSFLAG] = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */
2752 
2753  return FR_OK;
2754 #endif /* _USE_LFN != 0 */
2755 }
2756 
2757 
2758 
2759 
2760 /*-----------------------------------------------------------------------*/
2761 /* Follow a file path */
2762 /*-----------------------------------------------------------------------*/
2763 
2764 static
2765 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
2766  DIR* dp, /* Directory object to return last directory and found object */
2767  const TCHAR* path /* Full-path string to find a file or directory */
2768 )
2769 {
2770  FRESULT res;
2771  BYTE ns;
2772  _FDID *obj = &dp->obj;
2773  FATFS *fs = obj->fs;
2774 
2775 
2776 #if _FS_RPATH != 0
2777  if (*path != '/' && *path != '\\') { /* Without heading separator */
2778  obj->sclust = fs->cdir; /* Start from the current directory */
2779  } else
2780 #endif
2781  { /* With heading separator */
2782  while (*path == '/' || *path == '\\') path++; /* Strip heading separator */
2783  obj->sclust = 0; /* Start from the root directory */
2784  }
2785 #if _FS_EXFAT && _FS_RPATH != 0
2786  if (fs->fs_type == FS_EXFAT && obj->sclust) { /* Retrieve the sub-directory status if needed */
2787  DIR dj;
2788 
2789  obj->c_scl = fs->cdc_scl;
2790  obj->c_size = fs->cdc_size;
2791  obj->c_ofs = fs->cdc_ofs;
2792  res = load_obj_dir(&dj, obj);
2793  if (res != FR_OK) return res;
2794  obj->objsize = ld_dword(fs->dirbuf + XDIR_FileSize);
2795  obj->stat = fs->dirbuf[XDIR_GenFlags] & 2;
2796  }
2797 #endif
2798 
2799  if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */
2800  dp->fn[NSFLAG] = NS_NONAME;
2801  res = dir_sdi(dp, 0);
2802 
2803  } else { /* Follow path */
2804  for (;;) {
2805  res = create_name(dp, &path); /* Get a segment name of the path */
2806  if (res != FR_OK) break;
2807  res = dir_find(dp); /* Find an object with the segment name */
2808  ns = dp->fn[NSFLAG];
2809  if (res != FR_OK) { /* Failed to find the object */
2810  if (res == FR_NO_FILE) { /* Object is not found */
2811  if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, stay there */
2812  if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */
2813  dp->fn[NSFLAG] = NS_NONAME;
2814  res = FR_OK;
2815  } else { /* Could not find the object */
2816  if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */
2817  }
2818  }
2819  break;
2820  }
2821  if (ns & NS_LAST) break; /* Last segment matched. Function completed. */
2822  /* Get into the sub-directory */
2823  if (!(obj->attr & AM_DIR)) { /* It is not a sub-directory and cannot follow */
2824  res = FR_NO_PATH; break;
2825  }
2826 #if _FS_EXFAT
2827  if (fs->fs_type == FS_EXFAT) {
2828  obj->c_scl = obj->sclust; /* Save containing directory information for next dir */
2829  obj->c_size = ((DWORD)obj->objsize & 0xFFFFFF00) | obj->stat;
2830  obj->c_ofs = dp->blk_ofs;
2831  obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Open next directory */
2832  obj->stat = fs->dirbuf[XDIR_GenFlags] & 2;
2833  obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
2834  } else
2835 #endif
2836  {
2837  obj->sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs)); /* Open next directory */
2838  }
2839  }
2840  }
2841 
2842  return res;
2843 }
2844 
2845 
2846 
2847 
2848 /*-----------------------------------------------------------------------*/
2849 /* Get logical drive number from path name */
2850 /*-----------------------------------------------------------------------*/
2851 
2852 static
2853 int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */
2854  const TCHAR** path /* Pointer to pointer to the path name */
2855 )
2856 {
2857  const TCHAR *tp, *tt;
2858  UINT i;
2859  int vol = -1;
2860 #if _STR_VOLUME_ID /* Find string drive id */
2861  static const char* const str[] = {_VOLUME_STRS};
2862  const char *sp;
2863  char c;
2864  TCHAR tc;
2865 #endif
2866 
2867 
2868  if (*path) { /* If the pointer is not a null */
2869  for (tt = *path; (UINT)*tt >= (_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find ':' in the path */
2870  if (*tt == ':') { /* If a ':' is exist in the path name */
2871  tp = *path;
2872  i = *tp++ - '0';
2873  if (i < 10 && tp == tt) { /* Is there a numeric drive id? */
2874  if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
2875  vol = (int)i;
2876  *path = ++tt;
2877  }
2878  }
2879 #if _STR_VOLUME_ID
2880  else { /* No numeric drive number, find string drive id */
2881  i = 0; tt++;
2882  do {
2883  sp = str[i]; tp = *path;
2884  do { /* Compare a string drive id with path name */
2885  c = *sp++; tc = *tp++;
2886  if (IsLower(tc)) tc -= 0x20;
2887  } while (c && (TCHAR)c == tc);
2888  } while ((c || tp != tt) && ++i < _VOLUMES); /* Repeat for each id until pattern match */
2889  if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
2890  vol = (int)i;
2891  *path = tt;
2892  }
2893  }
2894 #endif
2895  return vol;
2896  }
2897 #if _FS_RPATH != 0 && _VOLUMES >= 2
2898  vol = CurrVol; /* Current drive */
2899 #else
2900  vol = 0; /* Drive 0 */
2901 #endif
2902  }
2903  return vol;
2904 }
2905 
2906 
2907 
2908 
2909 /*-----------------------------------------------------------------------*/
2910 /* Load a sector and check if it is an FAT boot sector */
2911 /*-----------------------------------------------------------------------*/
2912 
2913 static
2914 BYTE check_fs ( /* 0:FAT, 1:exFAT, 2:Valid BS but not FAT, 3:Not a BS, 4:Disk error */
2915  FATFS* fs, /* File system object */
2916  DWORD sect /* Sector# (lba) to check if it is an FAT-VBR or not */
2917 )
2918 {
2919  fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */
2920  if (move_window(fs, sect) != FR_OK) return 4; /* Load boot record */
2921 
2922  if (ld_word(fs->win + BS_55AA) != 0xAA55) return 3; /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */
2923 
2924  if (fs->win[BS_JmpBoot] == 0xE9 || (fs->win[BS_JmpBoot] == 0xEB && fs->win[BS_JmpBoot + 2] == 0x90)) {
2925  if ((ld_dword(fs->win + BS_FilSysType) & 0xFFFFFF) == 0x544146) return 0; /* Check "FAT" string */
2926  if (ld_dword(fs->win + BS_FilSysType32) == 0x33544146) return 0; /* Check "FAT3" string */
2927  }
2928 #if _FS_EXFAT
2929  if (!mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11)) return 1;
2930 #endif
2931  return 2;
2932 }
2933 
2934 
2935 
2936 
2937 /*-----------------------------------------------------------------------*/
2938 /* Find logical drive and check if the volume is mounted */
2939 /*-----------------------------------------------------------------------*/
2940 
2941 static
2942 FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */
2943  const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
2944  FATFS** rfs, /* Pointer to pointer to the found file system object */
2945  BYTE mode /* !=0: Check write protection for write access */
2946 )
2947 {
2948  BYTE fmt, *pt;
2949  int vol;
2950  DSTATUS stat;
2951  DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4];
2952  WORD nrsv;
2953  FATFS *fs;
2954  UINT i;
2955 
2956 
2957  /* Get logical drive number */
2958  *rfs = 0;
2959  vol = get_ldnumber(path);
2960  if (vol < 0) return FR_INVALID_DRIVE;
2961 
2962  /* Check if the file system object is valid or not */
2963  fs = FatFs[vol]; /* Get pointer to the file system object */
2964  if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
2965 
2966  ENTER_FF(fs); /* Lock the volume */
2967  *rfs = fs; /* Return pointer to the file system object */
2968 
2969  mode &= (BYTE)~FA_READ; /* Desired access mode, write access or not */
2970  if (fs->fs_type) { /* If the volume has been mounted */
2971  stat = disk_status(fs->drv);
2972  if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */
2973  if (!_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check write protection if needed */
2974  return FR_WRITE_PROTECTED;
2975  }
2976  return FR_OK; /* The file system object is valid */
2977  }
2978  }
2979 
2980  /* The file system object is not valid. */
2981  /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
2982 
2983  fs->fs_type = 0; /* Clear the file system object */
2984  fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */
2985  stat = disk_initialize(fs->drv); /* Initialize the physical drive */
2986  if (stat & STA_NOINIT) { /* Check if the initialization succeeded */
2987  return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
2988  }
2989  if (!_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check disk write protection if needed */
2990  return FR_WRITE_PROTECTED;
2991  }
2992 #if _MAX_SS != _MIN_SS /* Get sector size (multiple sector size cfg only) */
2993  if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) return FR_DISK_ERR;
2994  if (SS(fs) > _MAX_SS || SS(fs) < _MIN_SS || (SS(fs) & (SS(fs) - 1))) return FR_DISK_ERR;
2995 #endif
2996  /* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */
2997  bsect = 0;
2998  fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT-VBR as SFD */
2999  if (fmt == 2 || (fmt < 2 && LD2PT(vol) != 0)) { /* Not an FAT-VBR or forced partition number */
3000  for (i = 0; i < 4; i++) { /* Get partition offset */
3001  pt = fs->win + (MBR_Table + i * SZ_PTE);
3002  br[i] = pt[PTE_System] ? ld_dword(pt + PTE_StLba) : 0;
3003  }
3004  i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */
3005  if (i) i--;
3006  do { /* Find an FAT volume */
3007  bsect = br[i];
3008  fmt = bsect ? check_fs(fs, bsect) : 3; /* Check the partition */
3009  } while (!LD2PT(vol) && fmt >= 2 && ++i < 4);
3010  }
3011  if (fmt == 4) return FR_DISK_ERR; /* An error occured in the disk I/O layer */
3012  if (fmt >= 2) return FR_NO_FILESYSTEM; /* No FAT volume is found */
3013 
3014  /* An FAT volume is found. Following code initializes the file system object */
3015 
3016 #if _FS_EXFAT
3017  if (fmt == 1) {
3018  QWORD maxlba;
3019 
3020  for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ; /* Check zero filler */
3021  if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM;
3022 
3023  if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM; /* Check exFAT revision (Must be 1.0) */
3024 
3025  if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs)) /* (BPB_BytsPerSecEx must be equal to the physical sector size) */
3026  return FR_NO_FILESYSTEM;
3027 
3028  maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect; /* Last LBA + 1 of the volume */
3029  if (maxlba >= 0x100000000) return FR_NO_FILESYSTEM; /* (It cannot be handled in 32-bit LBA) */
3030 
3031  fs->fsize = ld_dword(fs->win + BPB_FatSzEx); /* Number of sectors per FAT */
3032 
3033  fs->n_fats = fs->win[BPB_NumFATsEx]; /* Number of FATs */
3034  if (fs->n_fats != 1) return FR_NO_FILESYSTEM; /* (Supports only 1 FAT) */
3035 
3036  fs->csize = 1 << fs->win[BPB_SecPerClusEx]; /* Cluster size */
3037  if (fs->csize == 0) return FR_NO_FILESYSTEM; /* (Must be 1..32768) */
3038 
3039  nclst = ld_dword(fs->win + BPB_NumClusEx); /* Number of clusters */
3040  if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM; /* (Too many clusters) */
3041  fs->n_fatent = nclst + 2;
3042 
3043  /* Boundaries and Limits */
3044  fs->volbase = bsect;
3045  fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx);
3046  fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx);
3047  if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM; /* (Volume size must not be smaller than the size requiered) */
3048  fs->dirbase = ld_dword(fs->win + BPB_RootClusEx);
3049 
3050  /* Check if bitmap location is in assumption (at the first cluster) */
3051  if (move_window(fs, clust2sect(fs, fs->dirbase)) != FR_OK) return FR_DISK_ERR;
3052  for (i = 0; i < SS(fs); i += SZDIRE) {
3053  if (fs->win[i] == 0x81 && ld_dword(fs->win + i + 20) == 2) break; /* 81 entry with cluster #2? */
3054  }
3055  if (i == SS(fs)) return FR_NO_FILESYSTEM;
3056 #if !_FS_READONLY
3057  fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */
3058 #endif
3059  fmt = FS_EXFAT; /* FAT sub-type */
3060  } else
3061 #endif /* _FS_EXFAT */
3062  {
3063  if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_BytsPerSec must be equal to the physical sector size) */
3064 
3065  fasize = ld_word(fs->win + BPB_FATSz16); /* Number of sectors per FAT */
3066  if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32);
3067  fs->fsize = fasize;
3068 
3069  fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FATs */
3070  if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */
3071  fasize *= fs->n_fats; /* Number of sectors for FAT area */
3072 
3073  fs->csize = fs->win[BPB_SecPerClus]; /* Cluster size */
3074  if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */
3075 
3076  fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt); /* Number of root directory entries */
3077  if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM; /* (Must be sector aligned) */
3078 
3079  tsect = ld_word(fs->win + BPB_TotSec16); /* Number of sectors on the volume */
3080  if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32);
3081 
3082  nrsv = ld_word(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */
3083  if (nrsv == 0) return FR_NO_FILESYSTEM; /* (Must not be 0) */
3084 
3085  /* Determine the FAT sub type */
3086  sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE); /* RSV + FAT + DIR */
3087  if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
3088  nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
3089  if (nclst == 0) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
3090  fmt = FS_FAT32;
3091  if (nclst <= MAX_FAT16) fmt = FS_FAT16;
3092  if (nclst <= MAX_FAT12) fmt = FS_FAT12;
3093 
3094  /* Boundaries and Limits */
3095  fs->n_fatent = nclst + 2; /* Number of FAT entries */
3096  fs->volbase = bsect; /* Volume start sector */
3097  fs->fatbase = bsect + nrsv; /* FAT start sector */
3098  fs->database = bsect + sysect; /* Data start sector */
3099  if (fmt == FS_FAT32) {
3100  if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM; /* (Must be FAT32 revision 0.0) */
3101  if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
3102  fs->dirbase = ld_dword(fs->win + BPB_RootClus32); /* Root directory start cluster */
3103  szbfat = fs->n_fatent * 4; /* (Needed FAT size) */
3104  } else {
3105  if (fs->n_rootdir == 0) return FR_NO_FILESYSTEM;/* (BPB_RootEntCnt must not be 0) */
3106  fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
3107  szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */
3108  fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
3109  }
3110  if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_FATSz must not be less than the size needed) */
3111 
3112 #if !_FS_READONLY
3113  /* Get FSINFO if available */
3114  fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */
3115  fs->fsi_flag = 0x80;
3116 #if (_FS_NOFSINFO & 3) != 3
3117  if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo32 == 1 */
3118  && ld_word(fs->win + BPB_FSInfo32) == 1
3119  && move_window(fs, bsect + 1) == FR_OK)
3120  {
3121  fs->fsi_flag = 0;
3122  if (ld_word(fs->win + BS_55AA) == 0xAA55 /* Load FSINFO data if available */
3123  && ld_dword(fs->win + FSI_LeadSig) == 0x41615252
3124  && ld_dword(fs->win + FSI_StrucSig) == 0x61417272)
3125  {
3126 #if (_FS_NOFSINFO & 1) == 0
3127  fs->free_clst = ld_dword(fs->win + FSI_Free_Count);
3128 #endif
3129 #if (_FS_NOFSINFO & 2) == 0
3130  fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free);
3131 #endif
3132  }
3133  }
3134 #endif /* (_FS_NOFSINFO & 3) != 3 */
3135 #endif /* !_FS_READONLY */
3136  }
3137 
3138  fs->fs_type = fmt; /* FAT sub-type */
3139  fs->id = ++Fsid; /* File system mount ID */
3140 #if _USE_LFN == 1
3141  fs->lfnbuf = LfnBuf; /* Static LFN working buffer */
3142 #if _FS_EXFAT
3143  fs->dirbuf = DirBuf; /* Static directory block working buuffer */
3144 #endif
3145 #endif
3146 #if _FS_RPATH != 0
3147  fs->cdir = 0; /* Initialize current directory */
3148 #endif
3149 #if _FS_LOCK != 0 /* Clear file lock semaphores */
3150  clear_lock(fs);
3151 #endif
3152  return FR_OK;
3153 }
3154 
3155 
3156 
3157 
3158 /*-----------------------------------------------------------------------*/
3159 /* Check if the file/directory object is valid or not */
3160 /*-----------------------------------------------------------------------*/
3161 
3162 static
3163 FRESULT validate ( /* Returns FR_OK or FR_INVALID_OBJECT */
3164  _FDID* obj, /* Pointer to the _OBJ, the 1st member in the FIL/DIR object, to check validity */
3165  FATFS** fs /* Pointer to pointer to the owner file system object to return */
3166 )
3167 {
3168  FRESULT res;
3169 
3170 
3171  if (!obj || !obj->fs || !obj->fs->fs_type || obj->fs->id != obj->id || (disk_status(obj->fs->drv) & STA_NOINIT)) {
3172  *fs = 0; /* The object is invalid */
3173  res = FR_INVALID_OBJECT;
3174  } else {
3175  *fs = obj->fs; /* Owner file sytem object */
3176  ENTER_FF(obj->fs); /* Lock file system */
3177  res = FR_OK;
3178  }
3179  return res;
3180 }
3181 
3182 
3183 
3184 
3185 /*---------------------------------------------------------------------------
3186 
3187  Public Functions (FatFs API)
3188 
3189 ----------------------------------------------------------------------------*/
3190 
3191 
3192 
3193 /*-----------------------------------------------------------------------*/
3194 /* Mount/Unmount a Logical Drive */
3195 /*-----------------------------------------------------------------------*/
3196 
3197 FRESULT f_mount (
3198  FATFS* fs, /* Pointer to the file system object (NULL:unmount)*/
3199  const TCHAR* path, /* Logical drive number to be mounted/unmounted */
3200  BYTE opt /* Mode option 0:Do not mount (delayed mount), 1:Mount immediately */
3201 )
3202 {
3203  FATFS *cfs;
3204  int vol;
3205  FRESULT res;
3206  const TCHAR *rp = path;
3207 
3208 
3209  /* Get logical drive number */
3210  vol = get_ldnumber(&rp);
3211  if (vol < 0) return FR_INVALID_DRIVE;
3212  cfs = FatFs[vol]; /* Pointer to fs object */
3213 
3214  if (cfs) {
3215 #if _FS_LOCK != 0
3216  clear_lock(cfs);
3217 #endif
3218 #if _FS_REENTRANT /* Discard sync object of the current volume */
3219  if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
3220 #endif
3221  cfs->fs_type = 0; /* Clear old fs object */
3222  }
3223 
3224  if (fs) {
3225  fs->fs_type = 0; /* Clear new fs object */
3226 #if _FS_REENTRANT /* Create sync object for the new volume */
3227  if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
3228 #endif
3229  }
3230  FatFs[vol] = fs; /* Register new fs object */
3231 
3232  if (!fs || opt != 1) return FR_OK; /* Do not mount now, it will be mounted later */
3233 
3234  res = find_volume(&path, &fs, 0); /* Force mounted the volume */
3235  LEAVE_FF(fs, res);
3236 }
3237 
3238 
3239 
3240 
3241 /*-----------------------------------------------------------------------*/
3242 /* Open or Create a File */
3243 /*-----------------------------------------------------------------------*/
3244 
3245 FRESULT f_open (
3246  FIL* fp, /* Pointer to the blank file object */
3247  const TCHAR* path, /* Pointer to the file name */
3248  BYTE mode /* Access mode and file open mode flags */
3249 )
3250 {
3251  FRESULT res;
3252  DIR dj;
3253  FATFS *fs;
3254 #if !_FS_READONLY
3255  DWORD dw, cl, bcs, clst, sc;
3256  FSIZE_t ofs;
3257 #endif
3258  DEF_NAMBUF
3259 
3260 
3261  if (!fp) return FR_INVALID_OBJECT;
3262 
3263  /* Get logical drive */
3264  mode &= _FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND | FA_SEEKEND;
3265  res = find_volume(&path, &fs, mode);
3266  if (res == FR_OK) {
3267  dj.obj.fs = fs;
3268  INIT_NAMBUF(fs);
3269  res = follow_path(&dj, path); /* Follow the file path */
3270 #if !_FS_READONLY /* R/W configuration */
3271  if (res == FR_OK) {
3272  if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */
3273  res = FR_INVALID_NAME;
3274  }
3275 #if _FS_LOCK != 0
3276  else {
3277  res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
3278  }
3279 #endif
3280  }
3281  /* Create or Open a file */
3282  if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
3283  if (res != FR_OK) { /* No file, create new */
3284  if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
3285 #if _FS_LOCK != 0
3286  res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
3287 #else
3288  res = dir_register(&dj);
3289 #endif
3290  mode |= FA_CREATE_ALWAYS; /* File is created */
3291  }
3292  else { /* Any object is already existing */
3293  if (dj.obj.attr & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */
3294  res = FR_DENIED;
3295  } else {
3296  if (mode & FA_CREATE_NEW) res = FR_EXIST; /* Cannot create as new file */
3297  }
3298  }
3299  if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */
3300  dw = GET_FATTIME();
3301 #if _FS_EXFAT
3302  if (fs->fs_type == FS_EXFAT) {
3303  /* Get current allocation info */
3304  fp->obj.fs = fs;
3305  fp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus);
3306  fp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
3307  fp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
3308  /* Initialize directory entry block */
3309  st_dword(fs->dirbuf + XDIR_CrtTime, dw); /* Set created time */
3310  fs->dirbuf[XDIR_CrtTime10] = 0;
3311  st_dword(fs->dirbuf + XDIR_ModTime, dw); /* Set modified time */
3312  fs->dirbuf[XDIR_ModTime10] = 0;
3313  fs->dirbuf[XDIR_Attr] = AM_ARC; /* Reset attribute */
3314  st_dword(fs->dirbuf + XDIR_FstClus, 0); /* Reset file allocation info */
3315  st_qword(fs->dirbuf + XDIR_FileSize, 0);
3316  st_qword(fs->dirbuf + XDIR_ValidFileSize, 0);
3317  fs->dirbuf[XDIR_GenFlags] = 1;
3318  res = store_xdir(&dj);
3319  if (res == FR_OK && fp->obj.sclust) { /* Remove the cluster chain if exist */
3320  res = remove_chain(&fp->obj, fp->obj.sclust, 0);
3321  fs->last_clst = fp->obj.sclust - 1; /* Reuse the cluster hole */
3322  }
3323  } else
3324 #endif
3325  {
3326  /* Clean directory info */
3327  st_dword(dj.dir + DIR_CrtTime, dw); /* Set created time */
3328  st_dword(dj.dir + DIR_ModTime, dw); /* Set modified time */
3329  dj.dir[DIR_Attr] = AM_ARC; /* Reset attribute */
3330  cl = ld_clust(fs, dj.dir); /* Get cluster chain */
3331  st_clust(fs, dj.dir, 0); /* Reset file allocation info */
3332  st_dword(dj.dir + DIR_FileSize, 0);
3333  fs->wflag = 1;
3334 
3335  if (cl) { /* Remove the cluster chain if exist */
3336  dw = fs->winsect;
3337  res = remove_chain(&dj.obj, cl, 0);
3338  if (res == FR_OK) {
3339  res = move_window(fs, dw);
3340  fs->last_clst = cl - 1; /* Reuse the cluster hole */
3341  }
3342  }
3343  }
3344  }
3345  }
3346  else { /* Open an existing file */
3347  if (res == FR_OK) { /* Following succeeded */
3348  if (dj.obj.attr & AM_DIR) { /* It is a directory */
3349  res = FR_NO_FILE;
3350  } else {
3351  if ((mode & FA_WRITE) && (dj.obj.attr & AM_RDO)) { /* R/O violation */
3352  res = FR_DENIED;
3353  }
3354  }
3355  }
3356  }
3357  if (res == FR_OK) {
3358  if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */
3359  mode |= FA_MODIFIED;
3360  fp->dir_sect = fs->winsect; /* Pointer to the directory entry */
3361  fp->dir_ptr = dj.dir;
3362 #if _FS_LOCK != 0
3363  fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
3364  if (!fp->obj.lockid) res = FR_INT_ERR;
3365 #endif
3366  }
3367 #else /* R/O configuration */
3368  if (res == FR_OK) {
3369  if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */
3370  res = FR_INVALID_NAME;
3371  } else {
3372  if (dj.obj.attr & AM_DIR) { /* It is a directory */
3373  res = FR_NO_FILE;
3374  }
3375  }
3376  }
3377 #endif
3378 
3379  if (res == FR_OK) {
3380 #if _FS_EXFAT
3381  if (fs->fs_type == FS_EXFAT) {
3382  fp->obj.sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Get allocation info */
3383  fp->obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
3384  fp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
3385  fp->obj.c_scl = dj.obj.sclust;
3386  fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
3387  fp->obj.c_ofs = dj.blk_ofs;
3388  } else
3389 #endif
3390  {
3391  fp->obj.sclust = ld_clust(fs, dj.dir); /* Get allocation info */
3392  fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize);
3393  }
3394 #if _USE_FASTSEEK
3395  fp->cltbl = 0; /* Disable fast seek mode */
3396 #endif
3397  fp->obj.fs = fs; /* Validate the file object */
3398  fp->obj.id = fs->id;
3399  fp->flag = mode; /* Set file access mode */
3400  fp->err = 0; /* Clear error flag */
3401  fp->sect = 0; /* Invalidate current data sector */
3402  fp->fptr = 0; /* Set file pointer top of the file */
3403 #if !_FS_READONLY
3404 #if !_FS_TINY
3405  mem_set(fp->buf, 0, _MAX_SS); /* Clear sector buffer */
3406 #endif
3407  if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) { /* Seek to end of file if FA_OPEN_APPEND is specified */
3408  fp->fptr = fp->obj.objsize; /* Offset to seek */
3409  bcs = (DWORD)fs->csize * SS(fs); /* Cluster size in byte */
3410  clst = fp->obj.sclust; /* Follow the cluster chain */
3411  for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) {
3412  clst = get_fat(&fp->obj, clst);
3413  if (clst <= 1) res = FR_INT_ERR;
3414  if (clst == 0xFFFFFFFF) res = FR_DISK_ERR;
3415  }
3416  fp->clust = clst;
3417  if (res == FR_OK && ofs % SS(fs)) { /* Fill sector buffer if not on the sector boundary */
3418  if ((sc = clust2sect(fs, clst)) == 0) {
3419  res = FR_INT_ERR;
3420  } else {
3421  fp->sect = sc + (DWORD)(ofs / SS(fs));
3422 #if !_FS_TINY
3423  if (disk_read(fs->drv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR;
3424 #endif
3425  }
3426  }
3427  }
3428 #endif
3429  }
3430 
3431  FREE_NAMBUF();
3432  }
3433 
3434  if (res != FR_OK) fp->obj.fs = 0; /* Invalidate file object on error */
3435 
3436  LEAVE_FF(fs, res);
3437 }
3438 
3439 
3440 
3441 
3442 /*-----------------------------------------------------------------------*/
3443 /* Read File */
3444 /*-----------------------------------------------------------------------*/
3445 
3446 FRESULT f_read (
3447  FIL* fp, /* Pointer to the file object */
3448  void* buff, /* Pointer to data buffer */
3449  UINT btr, /* Number of bytes to read */
3450  UINT* br /* Pointer to number of bytes read */
3451 )
3452 {
3453  FRESULT res;
3454  FATFS *fs;
3455  DWORD clst, sect;
3456  FSIZE_t remain;
3457  UINT rcnt, cc, csect;
3458  BYTE *rbuff = (BYTE*)buff;
3459 
3460 
3461  *br = 0; /* Clear read byte counter */
3462  res = validate(&fp->obj, &fs); /* Check validity of the file object */
3463  if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
3464  if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
3465  remain = fp->obj.objsize - fp->fptr;
3466  if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
3467 
3468  for ( ; btr; /* Repeat until all data read */
3469  rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
3470  if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
3471  csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */
3472  if (csect == 0) { /* On the cluster boundary? */
3473  if (fp->fptr == 0) { /* On the top of the file? */
3474  clst = fp->obj.sclust; /* Follow cluster chain from the origin */
3475  } else { /* Middle or end of the file */
3476 #if _USE_FASTSEEK
3477  if (fp->cltbl) {
3478  clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
3479  } else
3480 #endif
3481  {
3482  clst = get_fat(&fp->obj, fp->clust); /* Follow cluster chain on the FAT */
3483  }
3484  }
3485  if (clst < 2) ABORT(fs, FR_INT_ERR);
3486  if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
3487  fp->clust = clst; /* Update current cluster */
3488  }
3489  sect = clust2sect(fs, fp->clust); /* Get current sector */
3490  if (!sect) ABORT(fs, FR_INT_ERR);
3491  sect += csect;
3492  cc = btr / SS(fs); /* When remaining bytes >= sector size, */
3493  if (cc) { /* Read maximum contiguous sectors directly */
3494  if (csect + cc > fs->csize) { /* Clip at cluster boundary */
3495  cc = fs->csize - csect;
3496  }
3497  if (disk_read(fs->drv, rbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
3498 #if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
3499 #if _FS_TINY
3500  if (fs->wflag && fs->winsect - sect < cc) {
3501  mem_cpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs));
3502  }
3503 #else
3504  if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) {
3505  mem_cpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs));
3506  }
3507 #endif
3508 #endif
3509  rcnt = SS(fs) * cc; /* Number of bytes transferred */
3510  continue;
3511  }
3512 #if !_FS_TINY
3513  if (fp->sect != sect) { /* Load data sector if not in cache */
3514 #if !_FS_READONLY
3515  if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
3516  if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
3517  fp->flag &= (BYTE)~FA_DIRTY;
3518  }
3519 #endif
3520  if (disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */
3521  }
3522 #endif
3523  fp->sect = sect;
3524  }
3525  rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */
3526  if (rcnt > btr) rcnt = btr; /* Clip it by btr if needed */
3527 #if _FS_TINY
3528  if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */
3529  mem_cpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt); /* Extract partial sector */
3530 #else
3531  mem_cpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt); /* Extract partial sector */
3532 #endif
3533  }
3534 
3535  LEAVE_FF(fs, FR_OK);
3536 }
3537 
3538 
3539 
3540 
3541 #if !_FS_READONLY
3542 /*-----------------------------------------------------------------------*/
3543 /* Write File */
3544 /*-----------------------------------------------------------------------*/
3545 
3546 FRESULT f_write (
3547  FIL* fp, /* Pointer to the file object */
3548  const void* buff, /* Pointer to the data to be written */
3549  UINT btw, /* Number of bytes to write */
3550  UINT* bw /* Pointer to number of bytes written */
3551 )
3552 {
3553  FRESULT res;
3554  FATFS *fs;
3555  DWORD clst, sect;
3556  UINT wcnt, cc, csect;
3557  const BYTE *wbuff = (const BYTE*)buff;
3558 
3559 
3560  *bw = 0; /* Clear write byte counter */
3561  res = validate(&fp->obj, &fs); /* Check validity of the file object */
3562  if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
3563  if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
3564 
3565  /* Check fptr wrap-around (file size cannot reach 4GiB on FATxx) */
3566  if ((!_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) {
3567  btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr);
3568  }
3569 
3570  for ( ; btw; /* Repeat until all data written */
3571  wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize, *bw += wcnt, btw -= wcnt) {
3572  if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
3573  csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1); /* Sector offset in the cluster */
3574  if (csect == 0) { /* On the cluster boundary? */
3575  if (fp->fptr == 0) { /* On the top of the file? */
3576  clst = fp->obj.sclust; /* Follow from the origin */
3577  if (clst == 0) { /* If no cluster is allocated, */
3578  clst = create_chain(&fp->obj, 0); /* create a new cluster chain */
3579  }
3580  } else { /* On the middle or end of the file */
3581 #if _USE_FASTSEEK
3582  if (fp->cltbl) {
3583  clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
3584  } else
3585 #endif
3586  {
3587  clst = create_chain(&fp->obj, fp->clust); /* Follow or stretch cluster chain on the FAT */
3588  }
3589  }
3590  if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
3591  if (clst == 1) ABORT(fs, FR_INT_ERR);
3592  if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
3593  fp->clust = clst; /* Update current cluster */
3594  if (fp->obj.sclust == 0) fp->obj.sclust = clst; /* Set start cluster if the first write */
3595  }
3596 #if _FS_TINY
3597  if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Write-back sector cache */
3598 #else
3599  if (fp->flag & FA_DIRTY) { /* Write-back sector cache */
3600  if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
3601  fp->flag &= (BYTE)~FA_DIRTY;
3602  }
3603 #endif
3604  sect = clust2sect(fs, fp->clust); /* Get current sector */
3605  if (!sect) ABORT(fs, FR_INT_ERR);
3606  sect += csect;
3607  cc = btw / SS(fs); /* When remaining bytes >= sector size, */
3608  if (cc) { /* Write maximum contiguous sectors directly */
3609  if (csect + cc > fs->csize) { /* Clip at cluster boundary */
3610  cc = fs->csize - csect;
3611  }
3612  if (disk_write(fs->drv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
3613 #if _FS_MINIMIZE <= 2
3614 #if _FS_TINY
3615  if (fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
3616  mem_cpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs));
3617  fs->wflag = 0;
3618  }
3619 #else
3620  if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
3621  mem_cpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs));
3622  fp->flag &= (BYTE)~FA_DIRTY;
3623  }
3624 #endif
3625 #endif
3626  wcnt = SS(fs) * cc; /* Number of bytes transferred */
3627  continue;
3628  }
3629 #if _FS_TINY
3630  if (fp->fptr >= fp->obj.objsize) { /* Avoid silly cache filling on the growing edge */
3631  if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR);
3632  fs->winsect = sect;
3633  }
3634 #else
3635  if (fp->sect != sect && /* Fill sector cache with file data */
3636  fp->fptr < fp->obj.objsize &&
3637  disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) {
3638  ABORT(fs, FR_DISK_ERR);
3639  }
3640 #endif
3641  fp->sect = sect;
3642  }
3643  wcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */
3644  if (wcnt > btw) wcnt = btw; /* Clip it by btw if needed */
3645 #if _FS_TINY
3646  if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */
3647  mem_cpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */
3648  fs->wflag = 1;
3649 #else
3650  mem_cpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */
3651  fp->flag |= FA_DIRTY;
3652 #endif
3653  }
3654 
3655  fp->flag |= FA_MODIFIED; /* Set file change flag */
3656 
3657  LEAVE_FF(fs, FR_OK);
3658 }
3659 
3660 
3661 
3662 
3663 /*-----------------------------------------------------------------------*/
3664 /* Synchronize the File */
3665 /*-----------------------------------------------------------------------*/
3666 
3667 FRESULT f_sync (
3668  FIL* fp /* Pointer to the file object */
3669 )
3670 {
3671  FRESULT res;
3672  FATFS *fs;
3673  DWORD tm;
3674  BYTE *dir;
3675 #if _FS_EXFAT
3676  DEF_NAMBUF
3677 #endif
3678 
3679  res = validate(&fp->obj, &fs); /* Check validity of the file object */
3680  if (res == FR_OK) {
3681  if (fp->flag & FA_MODIFIED) { /* Is there any change to the file? */
3682 #if !_FS_TINY
3683  if (fp->flag & FA_DIRTY) { /* Write-back cached data if needed */
3684  if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR);
3685  fp->flag &= (BYTE)~FA_DIRTY;
3686  }
3687 #endif
3688  /* Update the directory entry */
3689  tm = GET_FATTIME(); /* Modified time */
3690 #if _FS_EXFAT
3691  if (fs->fs_type == FS_EXFAT) {
3692  res = fill_fat_chain(&fp->obj); /* Create FAT chain if needed */
3693  if (res == FR_OK) {
3694  DIR dj;
3695 
3696  INIT_NAMBUF(fs);
3697  res = load_obj_dir(&dj, &fp->obj); /* Load directory entry block */
3698  if (res == FR_OK) {
3699  fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive bit */
3700  fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1; /* Update file allocation info */
3701  st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust);
3702  st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize);
3703  st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize);
3704  st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Update modified time */
3705  fs->dirbuf[XDIR_ModTime10] = 0;
3706  st_dword(fs->dirbuf + XDIR_AccTime, 0);
3707  res = store_xdir(&dj); /* Restore it to the directory */
3708  if (res == FR_OK) {
3709  res = sync_fs(fs);
3710  fp->flag &= (BYTE)~FA_MODIFIED;
3711  }
3712  }
3713  FREE_NAMBUF();
3714  }
3715  } else
3716 #endif
3717  {
3718  res = move_window(fs, fp->dir_sect);
3719  if (res == FR_OK) {
3720  dir = fp->dir_ptr;
3721  dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
3722  st_clust(fp->obj.fs, dir, fp->obj.sclust); /* Update file allocation info */
3723  st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize); /* Update file size */
3724  st_dword(dir + DIR_ModTime, tm); /* Update modified time */
3725  st_word(dir + DIR_LstAccDate, 0);
3726  fs->wflag = 1;
3727  res = sync_fs(fs); /* Restore it to the directory */
3728  fp->flag &= (BYTE)~FA_MODIFIED;
3729  }
3730  }
3731  }
3732  }
3733 
3734  LEAVE_FF(fs, res);
3735 }
3736 
3737 #endif /* !_FS_READONLY */
3738 
3739 
3740 
3741 
3742 /*-----------------------------------------------------------------------*/
3743 /* Close File */
3744 /*-----------------------------------------------------------------------*/
3745 
3746 FRESULT f_close (
3747  FIL* fp /* Pointer to the file object to be closed */
3748 )
3749 {
3750  FRESULT res;
3751  FATFS *fs;
3752 
3753 #if !_FS_READONLY
3754  res = f_sync(fp); /* Flush cached data */
3755  if (res == FR_OK)
3756 #endif
3757  {
3758  res = validate(&fp->obj, &fs); /* Lock volume */
3759  if (res == FR_OK) {
3760 #if _FS_LOCK != 0
3761  res = dec_lock(fp->obj.lockid); /* Decrement file open counter */
3762  if (res == FR_OK)
3763 #endif
3764  {
3765  fp->obj.fs = 0; /* Invalidate file object */
3766  }
3767 #if _FS_REENTRANT
3768  unlock_fs(fs, FR_OK); /* Unlock volume */
3769 #endif
3770  }
3771  }
3772  return res;
3773 }
3774 
3775 
3776 
3777 
3778 #if _FS_RPATH >= 1
3779 /*-----------------------------------------------------------------------*/
3780 /* Change Current Directory or Current Drive, Get Current Directory */
3781 /*-----------------------------------------------------------------------*/
3782 
3783 #if _VOLUMES >= 2
3784 FRESULT f_chdrive (
3785  const TCHAR* path /* Drive number */
3786 )
3787 {
3788  int vol;
3789 
3790 
3791  /* Get logical drive number */
3792  vol = get_ldnumber(&path);
3793  if (vol < 0) return FR_INVALID_DRIVE;
3794 
3795  CurrVol = (BYTE)vol; /* Set it as current volume */
3796 
3797  return FR_OK;
3798 }
3799 #endif
3800 
3801 
3802 FRESULT f_chdir (
3803  const TCHAR* path /* Pointer to the directory path */
3804 )
3805 {
3806  FRESULT res;
3807  DIR dj;
3808  FATFS *fs;
3809  DEF_NAMBUF
3810 
3811  /* Get logical drive */
3812  res = find_volume(&path, &fs, 0);
3813  if (res == FR_OK) {
3814  dj.obj.fs = fs;
3815  INIT_NAMBUF(fs);
3816  res = follow_path(&dj, path); /* Follow the path */
3817  if (res == FR_OK) { /* Follow completed */
3818  if (dj.fn[NSFLAG] & NS_NONAME) {
3819  fs->cdir = dj.obj.sclust; /* It is the start directory itself */
3820 #if _FS_EXFAT
3821  if (fs->fs_type == FS_EXFAT) {
3822  fs->cdc_scl = dj.obj.c_scl;
3823  fs->cdc_size = dj.obj.c_size;
3824  fs->cdc_ofs = dj.obj.c_ofs;
3825  }
3826 #endif
3827  } else {
3828  if (dj.obj.attr & AM_DIR) { /* It is a sub-directory */
3829 #if _FS_EXFAT
3830  if (fs->fs_type == FS_EXFAT) {
3831  fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus); /* Sub-directory cluster */
3832  fs->cdc_scl = dj.obj.sclust; /* Save containing directory information */
3833  fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
3834  fs->cdc_ofs = dj.blk_ofs;
3835  } else
3836 #endif
3837  {
3838  fs->cdir = ld_clust(fs, dj.dir); /* Sub-directory cluster */
3839  }
3840  } else {
3841  res = FR_NO_PATH; /* Reached but a file */
3842  }
3843  }
3844  }
3845  FREE_NAMBUF();
3846  if (res == FR_NO_FILE) res = FR_NO_PATH;
3847  }
3848 
3849  LEAVE_FF(fs, res);
3850 }
3851 
3852 
3853 #if _FS_RPATH >= 2
3854 FRESULT f_getcwd (
3855  TCHAR* buff, /* Pointer to the directory path */
3856  UINT len /* Size of path */
3857 )
3858 {
3859  FRESULT res;
3860  DIR dj;
3861  FATFS *fs;
3862  UINT i, n;
3863  DWORD ccl;
3864  TCHAR *tp;
3865  FILINFO fno;
3866  DEF_NAMBUF
3867 
3868 
3869  *buff = 0;
3870  /* Get logical drive */
3871  res = find_volume((const TCHAR**)&buff, &fs, 0); /* Get current volume */
3872  if (res == FR_OK) {
3873  dj.obj.fs = fs;
3874  INIT_NAMBUF(fs);
3875  i = len; /* Bottom of buffer (directory stack base) */
3876  if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* (Cannot do getcwd on exFAT and returns root path) */
3877  dj.obj.sclust = fs->cdir; /* Start to follow upper directory from current directory */
3878  while ((ccl = dj.obj.sclust) != 0) { /* Repeat while current directory is a sub-directory */
3879  res = dir_sdi(&dj, 1 * SZDIRE); /* Get parent directory */
3880  if (res != FR_OK) break;
3881  res = move_window(fs, dj.sect);
3882  if (res != FR_OK) break;
3883  dj.obj.sclust = ld_clust(fs, dj.dir); /* Goto parent directory */
3884  res = dir_sdi(&dj, 0);
3885  if (res != FR_OK) break;
3886  do { /* Find the entry links to the child directory */
3887  res = dir_read(&dj, 0);
3888  if (res != FR_OK) break;
3889  if (ccl == ld_clust(fs, dj.dir)) break; /* Found the entry */
3890  res = dir_next(&dj, 0);
3891  } while (res == FR_OK);
3892  if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
3893  if (res != FR_OK) break;
3894  get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */
3895  for (n = 0; fno.fname[n]; n++) ;
3896  if (i < n + 3) {
3897  res = FR_NOT_ENOUGH_CORE; break;
3898  }
3899  while (n) buff[--i] = fno.fname[--n];
3900  buff[--i] = '/';
3901  }
3902  }
3903  tp = buff;
3904  if (res == FR_OK) {
3905 #if _VOLUMES >= 2
3906  *tp++ = '0' + CurrVol; /* Put drive number */
3907  *tp++ = ':';
3908 #endif
3909  if (i == len) { /* Root-directory */
3910  *tp++ = '/';
3911  } else { /* Sub-directroy */
3912  do /* Add stacked path str */
3913  *tp++ = buff[i++];
3914  while (i < len);
3915  }
3916  }
3917  *tp = 0;
3918  FREE_NAMBUF();
3919  }
3920 
3921  LEAVE_FF(fs, res);
3922 }
3923 
3924 #endif /* _FS_RPATH >= 2 */
3925 #endif /* _FS_RPATH >= 1 */
3926 
3927 
3928 
3929 #if _FS_MINIMIZE <= 2
3930 /*-----------------------------------------------------------------------*/
3931 /* Seek File R/W Pointer */
3932 /*-----------------------------------------------------------------------*/
3933 
3934 FRESULT f_lseek (
3935  FIL* fp, /* Pointer to the file object */
3936  FSIZE_t ofs /* File pointer from top of file */
3937 )
3938 {
3939  FRESULT res;
3940  FATFS *fs;
3941  DWORD clst, bcs, nsect;
3942  FSIZE_t ifptr;
3943 #if _USE_FASTSEEK
3944  DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
3945 #endif
3946 
3947  res = validate(&fp->obj, &fs); /* Check validity of the file object */
3948  if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
3949 #if _USE_FASTSEEK
3950  if (fp->cltbl) { /* Fast seek */
3951  if (ofs == CREATE_LINKMAP) { /* Create CLMT */
3952  tbl = fp->cltbl;
3953  tlen = *tbl++; ulen = 2; /* Given table size and required table size */
3954  cl = fp->obj.sclust; /* Origin of the chain */
3955  if (cl) {
3956  do {
3957  /* Get a fragment */
3958  tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
3959  do {
3960  pcl = cl; ncl++;
3961  cl = get_fat(&fp->obj, cl);
3962  if (cl <= 1) ABORT(fs, FR_INT_ERR);
3963  if (cl == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
3964  } while (cl == pcl + 1);
3965  if (ulen <= tlen) { /* Store the length and top of the fragment */
3966  *tbl++ = ncl; *tbl++ = tcl;
3967  }
3968  } while (cl < fs->n_fatent); /* Repeat until end of chain */
3969  }
3970  *fp->cltbl = ulen; /* Number of items used */
3971  if (ulen <= tlen) {
3972  *tbl = 0; /* Terminate table */
3973  } else {
3974  res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
3975  }
3976  } else { /* Fast seek */
3977  if (ofs > fp->obj.objsize) ofs = fp->obj.objsize; /* Clip offset at the file size */
3978  fp->fptr = ofs; /* Set file pointer */
3979  if (ofs) {
3980  fp->clust = clmt_clust(fp, ofs - 1);
3981  dsc = clust2sect(fs, fp->clust);
3982  if (!dsc) ABORT(fs, FR_INT_ERR);
3983  dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1);
3984  if (fp->fptr % SS(fs) && dsc != fp->sect) { /* Refill sector cache if needed */
3985 #if !_FS_TINY
3986 #if !_FS_READONLY
3987  if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
3988  if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
3989  fp->flag &= (BYTE)~FA_DIRTY;
3990  }
3991 #endif
3992  if (disk_read(fs->drv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Load current sector */
3993 #endif
3994  fp->sect = dsc;
3995  }
3996  }
3997  }
3998  } else
3999 #endif
4000 
4001  /* Normal Seek */
4002  {
4003 #if _FS_EXFAT
4004  if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF; /* Clip at 4GiB-1 if at FATxx */
4005 #endif
4006  if (ofs > fp->obj.objsize && (_FS_READONLY || !(fp->flag & FA_WRITE))) { /* In read-only mode, clip offset with the file size */
4007  ofs = fp->obj.objsize;
4008  }
4009  ifptr = fp->fptr;
4010  fp->fptr = nsect = 0;
4011  if (ofs) {
4012  bcs = (DWORD)fs->csize * SS(fs); /* Cluster size (byte) */
4013  if (ifptr > 0 &&
4014  (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
4015  fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1); /* start from the current cluster */
4016  ofs -= fp->fptr;
4017  clst = fp->clust;
4018  } else { /* When seek to back cluster, */
4019  clst = fp->obj.sclust; /* start from the first cluster */
4020 #if !_FS_READONLY
4021  if (clst == 0) { /* If no cluster chain, create a new chain */
4022  clst = create_chain(&fp->obj, 0);
4023  if (clst == 1) ABORT(fs, FR_INT_ERR);
4024  if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4025  fp->obj.sclust = clst;
4026  }
4027 #endif
4028  fp->clust = clst;
4029  }
4030  if (clst != 0) {
4031  while (ofs > bcs) { /* Cluster following loop */
4032  ofs -= bcs; fp->fptr += bcs;
4033 #if !_FS_READONLY
4034  if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
4035  if (_FS_EXFAT && fp->fptr > fp->obj.objsize) { /* No FAT chain object needs correct objsize to generate FAT value */
4036  fp->obj.objsize = fp->fptr;
4037  fp->flag |= FA_MODIFIED;
4038  }
4039  clst = create_chain(&fp->obj, clst); /* Follow chain with forceed stretch */
4040  if (clst == 0) { /* Clip file size in case of disk full */
4041  ofs = 0; break;
4042  }
4043  } else
4044 #endif
4045  {
4046  clst = get_fat(&fp->obj, clst); /* Follow cluster chain if not in write mode */
4047  }
4048  if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4049  if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR);
4050  fp->clust = clst;
4051  }
4052  fp->fptr += ofs;
4053  if (ofs % SS(fs)) {
4054  nsect = clust2sect(fs, clst); /* Current sector */
4055  if (!nsect) ABORT(fs, FR_INT_ERR);
4056  nsect += (DWORD)(ofs / SS(fs));
4057  }
4058  }
4059  }
4060  if (!_FS_READONLY && fp->fptr > fp->obj.objsize) { /* Set file change flag if the file size is extended */
4061  fp->obj.objsize = fp->fptr;
4062  fp->flag |= FA_MODIFIED;
4063  }
4064  if (fp->fptr % SS(fs) && nsect != fp->sect) { /* Fill sector cache if needed */
4065 #if !_FS_TINY
4066 #if !_FS_READONLY
4067  if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
4068  if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4069  fp->flag &= (BYTE)~FA_DIRTY;
4070  }
4071 #endif
4072  if (disk_read(fs->drv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */
4073 #endif
4074  fp->sect = nsect;
4075  }
4076  }
4077 
4078  LEAVE_FF(fs, res);
4079 }
4080 
4081 
4082 
4083 #if _FS_MINIMIZE <= 1
4084 /*-----------------------------------------------------------------------*/
4085 /* Create a Directory Object */
4086 /*-----------------------------------------------------------------------*/
4087 
4088 FRESULT f_opendir (
4089  DIR* dp, /* Pointer to directory object to create */
4090  const TCHAR* path /* Pointer to the directory path */
4091 )
4092 {
4093  FRESULT res;
4094  FATFS *fs;
4095  _FDID *obj;
4096  DEF_NAMBUF
4097 
4098 
4099  if (!dp) return FR_INVALID_OBJECT;
4100 
4101  /* Get logical drive */
4102  obj = &dp->obj;
4103  res = find_volume(&path, &fs, 0);
4104  if (res == FR_OK) {
4105  obj->fs = fs;
4106  INIT_NAMBUF(fs);
4107  res = follow_path(dp, path); /* Follow the path to the directory */
4108  if (res == FR_OK) { /* Follow completed */
4109  if (!(dp->fn[NSFLAG] & NS_NONAME)) { /* It is not the origin directory itself */
4110  if (obj->attr & AM_DIR) { /* This object is a sub-directory */
4111 #if _FS_EXFAT
4112  if (fs->fs_type == FS_EXFAT) {
4113  obj->c_scl = obj->sclust; /* Save containing directory inforamation */
4114  obj->c_size = ((DWORD)obj->objsize & 0xFFFFFF00) | obj->stat;
4115  obj->c_ofs = dp->blk_ofs;
4116  obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Get object location and status */
4117  obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
4118  obj->stat = fs->dirbuf[XDIR_GenFlags] & 2;
4119  } else
4120 #endif
4121  {
4122  obj->sclust = ld_clust(fs, dp->dir); /* Get object location */
4123  }
4124  } else { /* This object is a file */
4125  res = FR_NO_PATH;
4126  }
4127  }
4128  if (res == FR_OK) {
4129  obj->id = fs->id;
4130  res = dir_sdi(dp, 0); /* Rewind directory */
4131 #if _FS_LOCK != 0
4132  if (res == FR_OK) {
4133  if (obj->sclust) {
4134  obj->lockid = inc_lock(dp, 0); /* Lock the sub directory */
4135  if (!obj->lockid) res = FR_TOO_MANY_OPEN_FILES;
4136  } else {
4137  obj->lockid = 0; /* Root directory need not to be locked */
4138  }
4139  }
4140 #endif
4141  }
4142  }
4143  FREE_NAMBUF();
4144  if (res == FR_NO_FILE) res = FR_NO_PATH;
4145  }
4146  if (res != FR_OK) obj->fs = 0; /* Invalidate the directory object if function faild */
4147 
4148  LEAVE_FF(fs, res);
4149 }
4150 
4151 
4152 
4153 
4154 /*-----------------------------------------------------------------------*/
4155 /* Close Directory */
4156 /*-----------------------------------------------------------------------*/
4157 
4158 FRESULT f_closedir (
4159  DIR *dp /* Pointer to the directory object to be closed */
4160 )
4161 {
4162  FRESULT res;
4163  FATFS *fs;
4164 
4165 
4166  res = validate(&dp->obj, &fs); /* Check validity of the file object */
4167  if (res == FR_OK) {
4168 #if _FS_LOCK != 0
4169  if (dp->obj.lockid) { /* Decrement sub-directory open counter */
4170  res = dec_lock(dp->obj.lockid);
4171  }
4172  if (res == FR_OK)
4173 #endif
4174  {
4175  dp->obj.fs = 0; /* Invalidate directory object */
4176  }
4177 #if _FS_REENTRANT
4178  unlock_fs(fs, FR_OK); /* Unlock volume */
4179 #endif
4180  }
4181  return res;
4182 }
4183 
4184 
4185 
4186 
4187 /*-----------------------------------------------------------------------*/
4188 /* Read Directory Entries in Sequence */
4189 /*-----------------------------------------------------------------------*/
4190 
4191 FRESULT f_readdir (
4192  DIR* dp, /* Pointer to the open directory object */
4193  FILINFO* fno /* Pointer to file information to return */
4194 )
4195 {
4196  FRESULT res;
4197  FATFS *fs;
4198  DEF_NAMBUF
4199 
4200 
4201  res = validate(&dp->obj, &fs); /* Check validity of the directory object */
4202  if (res == FR_OK) {
4203  if (!fno) {
4204  res = dir_sdi(dp, 0); /* Rewind the directory object */
4205  } else {
4206  INIT_NAMBUF(fs);
4207  res = dir_read(dp, 0); /* Read an item */
4208  if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory */
4209  if (res == FR_OK) { /* A valid entry is found */
4210  get_fileinfo(dp, fno); /* Get the object information */
4211  res = dir_next(dp, 0); /* Increment index for next */
4212  if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory now */
4213  }
4214  FREE_NAMBUF();
4215  }
4216  }
4217  LEAVE_FF(fs, res);
4218 }
4219 
4220 
4221 
4222 #if _USE_FIND
4223 /*-----------------------------------------------------------------------*/
4224 /* Find Next File */
4225 /*-----------------------------------------------------------------------*/
4226 
4227 FRESULT f_findnext (
4228  DIR* dp, /* Pointer to the open directory object */
4229  FILINFO* fno /* Pointer to the file information structure */
4230 )
4231 {
4232  FRESULT res;
4233 
4234 
4235  for (;;) {
4236  res = f_readdir(dp, fno); /* Get a directory item */
4237  if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */
4238  if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for the file name */
4239 #if _USE_LFN != 0 && _USE_FIND == 2
4240  if (pattern_matching(dp->pat, fno->altname, 0, 0)) break; /* Test for alternative name if exist */
4241 #endif
4242  }
4243  return res;
4244 }
4245 
4246 
4247 
4248 /*-----------------------------------------------------------------------*/
4249 /* Find First File */
4250 /*-----------------------------------------------------------------------*/
4251 
4252 FRESULT f_findfirst (
4253  DIR* dp, /* Pointer to the blank directory object */
4254  FILINFO* fno, /* Pointer to the file information structure */
4255  const TCHAR* path, /* Pointer to the directory to open */
4256  const TCHAR* pattern /* Pointer to the matching pattern */
4257 )
4258 {
4259  FRESULT res;
4260 
4261 
4262  dp->pat = pattern; /* Save pointer to pattern string */
4263  res = f_opendir(dp, path); /* Open the target directory */
4264  if (res == FR_OK) {
4265  res = f_findnext(dp, fno); /* Find the first item */
4266  }
4267  return res;
4268 }
4269 
4270 #endif /* _USE_FIND */
4271 
4272 
4273 
4274 #if _FS_MINIMIZE == 0
4275 /*-----------------------------------------------------------------------*/
4276 /* Get File Status */
4277 /*-----------------------------------------------------------------------*/
4278 
4279 FRESULT f_stat (
4280  const TCHAR* path, /* Pointer to the file path */
4281  FILINFO* fno /* Pointer to file information to return */
4282 )
4283 {
4284  FRESULT res;
4285  DIR dj;
4286  DEF_NAMBUF
4287 
4288 
4289  /* Get logical drive */
4290  res = find_volume(&path, &dj.obj.fs, 0);
4291  if (res == FR_OK) {
4292  INIT_NAMBUF(dj.obj.fs);
4293  res = follow_path(&dj, path); /* Follow the file path */
4294  if (res == FR_OK) { /* Follow completed */
4295  if (dj.fn[NSFLAG] & NS_NONAME) { /* It is origin directory */
4296  res = FR_INVALID_NAME;
4297  } else { /* Found an object */
4298  if (fno) get_fileinfo(&dj, fno);
4299  }
4300  }
4301  FREE_NAMBUF();
4302  }
4303 
4304  LEAVE_FF(dj.obj.fs, res);
4305 }
4306 
4307 
4308 
4309 #if !_FS_READONLY
4310 /*-----------------------------------------------------------------------*/
4311 /* Get Number of Free Clusters */
4312 /*-----------------------------------------------------------------------*/
4313 
4314 FRESULT f_getfree (
4315  const TCHAR* path, /* Path name of the logical drive number */
4316  DWORD* nclst, /* Pointer to a variable to return number of free clusters */
4317  FATFS** fatfs /* Pointer to return pointer to corresponding file system object */
4318 )
4319 {
4320  FRESULT res;
4321  FATFS *fs;
4322  DWORD nfree, clst, sect, stat;
4323  UINT i;
4324  BYTE *p;
4325  _FDID obj;
4326 
4327 
4328  /* Get logical drive */
4329  res = find_volume(&path, &fs, 0);
4330  if (res == FR_OK) {
4331  *fatfs = fs; /* Return ptr to the fs object */
4332  /* If free_clst is valid, return it without full cluster scan */
4333  if (fs->free_clst <= fs->n_fatent - 2) {
4334  *nclst = fs->free_clst;
4335  } else {
4336  /* Get number of free clusters */
4337  nfree = 0;
4338  if (fs->fs_type == FS_FAT12) { /* FAT12: Sector unalighed FAT entries */
4339  clst = 2; obj.fs = fs;
4340  do {
4341  stat = get_fat(&obj, clst);
4342  if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
4343  if (stat == 1) { res = FR_INT_ERR; break; }
4344  if (stat == 0) nfree++;
4345  } while (++clst < fs->n_fatent);
4346  } else {
4347 #if _FS_EXFAT
4348  if (fs->fs_type == FS_EXFAT) { /* exFAT: Scan bitmap table */
4349  BYTE bm;
4350  UINT b;
4351 
4352  clst = fs->n_fatent - 2;
4353  sect = fs->database;
4354  i = 0;
4355  do {
4356  if (i == 0 && (res = move_window(fs, sect++)) != FR_OK) break;
4357  for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) {
4358  if (!(bm & 1)) nfree++;
4359  bm >>= 1;
4360  }
4361  i = (i + 1) % SS(fs);
4362  } while (clst);
4363  } else
4364 #endif
4365  { /* FAT16/32: Sector alighed FAT entries */
4366  clst = fs->n_fatent; sect = fs->fatbase;
4367  i = 0; p = 0;
4368  do {
4369  if (i == 0) {
4370  res = move_window(fs, sect++);
4371  if (res != FR_OK) break;
4372  p = fs->win;
4373  i = SS(fs);
4374  }
4375  if (fs->fs_type == FS_FAT16) {
4376  if (ld_word(p) == 0) nfree++;
4377  p += 2; i -= 2;
4378  } else {
4379  if ((ld_dword(p) & 0x0FFFFFFF) == 0) nfree++;
4380  p += 4; i -= 4;
4381  }
4382  } while (--clst);
4383  }
4384  }
4385  *nclst = nfree; /* Return the free clusters */
4386  fs->free_clst = nfree; /* Now free_clst is valid */
4387  fs->fsi_flag |= 1; /* FSInfo is to be updated */
4388  }
4389  }
4390 
4391  LEAVE_FF(fs, res);
4392 }
4393 
4394 
4395 
4396 
4397 /*-----------------------------------------------------------------------*/
4398 /* Truncate File */
4399 /*-----------------------------------------------------------------------*/
4400 
4401 FRESULT f_truncate (
4402  FIL* fp /* Pointer to the file object */
4403 )
4404 {
4405  FRESULT res;
4406  FATFS *fs;
4407  DWORD ncl;
4408 
4409 
4410  res = validate(&fp->obj, &fs); /* Check validity of the file object */
4411  if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
4412  if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
4413 
4414  if (fp->obj.objsize > fp->fptr) {
4415  if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
4416  res = remove_chain(&fp->obj, fp->obj.sclust, 0);
4417  fp->obj.sclust = 0;
4418  } else { /* When truncate a part of the file, remove remaining clusters */
4419  ncl = get_fat(&fp->obj, fp->clust);
4420  res = FR_OK;
4421  if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
4422  if (ncl == 1) res = FR_INT_ERR;
4423  if (res == FR_OK && ncl < fs->n_fatent) {
4424  res = remove_chain(&fp->obj, ncl, fp->clust);
4425  }
4426  }
4427  fp->obj.objsize = fp->fptr; /* Set file size to current R/W point */
4428  fp->flag |= FA_MODIFIED;
4429 #if !_FS_TINY
4430  if (res == FR_OK && (fp->flag & FA_DIRTY)) {
4431  if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) {
4432  res = FR_DISK_ERR;
4433  } else {
4434  fp->flag &= (BYTE)~FA_DIRTY;
4435  }
4436  }
4437 #endif
4438  if (res != FR_OK) ABORT(fs, res);
4439  }
4440 
4441  LEAVE_FF(fs, res);
4442 }
4443 
4444 
4445 
4446 
4447 /*-----------------------------------------------------------------------*/
4448 /* Delete a File/Directory */
4449 /*-----------------------------------------------------------------------*/
4450 
4451 FRESULT f_unlink (
4452  const TCHAR* path /* Pointer to the file or directory path */
4453 )
4454 {
4455  FRESULT res;
4456  DIR dj, sdj;
4457  DWORD dclst = 0;
4458  FATFS *fs;
4459 #if _FS_EXFAT
4460  _FDID obj;
4461 #endif
4462  DEF_NAMBUF
4463 
4464 
4465  /* Get logical drive */
4466  res = find_volume(&path, &fs, FA_WRITE);
4467  dj.obj.fs = fs;
4468  if (res == FR_OK) {
4469  INIT_NAMBUF(fs);
4470  res = follow_path(&dj, path); /* Follow the file path */
4471  if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) {
4472  res = FR_INVALID_NAME; /* Cannot remove dot entry */
4473  }
4474 #if _FS_LOCK != 0
4475  if (res == FR_OK) res = chk_lock(&dj, 2); /* Check if it is an open object */
4476 #endif
4477  if (res == FR_OK) { /* The object is accessible */
4478  if (dj.fn[NSFLAG] & NS_NONAME) {
4479  res = FR_INVALID_NAME; /* Cannot remove the origin directory */
4480  } else {
4481  if (dj.obj.attr & AM_RDO) {
4482  res = FR_DENIED; /* Cannot remove R/O object */
4483  }
4484  }
4485  if (res == FR_OK) {
4486 #if _FS_EXFAT
4487  obj.fs = fs;
4488  if (fs->fs_type == FS_EXFAT) {
4489  obj.sclust = dclst = ld_dword(fs->dirbuf + XDIR_FstClus);
4490  obj.objsize = ld_qword(fs->dirbuf + XDIR_FileSize);
4491  obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
4492  } else
4493 #endif
4494  {
4495  dclst = ld_clust(fs, dj.dir);
4496  }
4497  if (dj.obj.attr & AM_DIR) { /* Is it a sub-directory ? */
4498 #if _FS_RPATH != 0
4499  if (dclst == fs->cdir) { /* Is it the current directory? */
4500  res = FR_DENIED;
4501  } else
4502 #endif
4503  {
4504  sdj.obj.fs = fs; /* Open the sub-directory */
4505  sdj.obj.sclust = dclst;
4506 #if _FS_EXFAT
4507  if (fs->fs_type == FS_EXFAT) {
4508  sdj.obj.objsize = obj.objsize;
4509  sdj.obj.stat = obj.stat;
4510  }
4511 #endif
4512  res = dir_sdi(&sdj, 0);
4513  if (res == FR_OK) {
4514  res = dir_read(&sdj, 0); /* Read an item */
4515  if (res == FR_OK) res = FR_DENIED; /* Not empty? */
4516  if (res == FR_NO_FILE) res = FR_OK; /* Empty? */
4517  }
4518  }
4519  }
4520  }
4521  if (res == FR_OK) {
4522  res = dir_remove(&dj); /* Remove the directory entry */
4523  if (res == FR_OK && dclst) { /* Remove the cluster chain if exist */
4524 #if _FS_EXFAT
4525  res = remove_chain(&obj, dclst, 0);
4526 #else
4527  res = remove_chain(&dj.obj, dclst, 0);
4528 #endif
4529  }
4530  if (res == FR_OK) res = sync_fs(fs);
4531  }
4532  }
4533  FREE_NAMBUF();
4534  }
4535 
4536  LEAVE_FF(fs, res);
4537 }
4538 
4539 
4540 
4541 
4542 /*-----------------------------------------------------------------------*/
4543 /* Create a Directory */
4544 /*-----------------------------------------------------------------------*/
4545 
4546 FRESULT f_mkdir (
4547  const TCHAR* path /* Pointer to the directory path */
4548 )
4549 {
4550  FRESULT res;
4551  DIR dj;
4552  FATFS *fs;
4553  BYTE *dir;
4554  UINT n;
4555  DWORD dsc, dcl, pcl, tm;
4556  DEF_NAMBUF
4557 
4558 
4559  /* Get logical drive */
4560  res = find_volume(&path, &fs, FA_WRITE);
4561  dj.obj.fs = fs;
4562  if (res == FR_OK) {
4563  INIT_NAMBUF(fs);
4564  res = follow_path(&dj, path); /* Follow the file path */
4565  if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */
4566  if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) {
4567  res = FR_INVALID_NAME;
4568  }
4569  if (res == FR_NO_FILE) { /* Can create a new directory */
4570  dcl = create_chain(&dj.obj, 0); /* Allocate a cluster for the new directory table */
4571  dj.obj.objsize = (DWORD)fs->csize * SS(fs);
4572  res = FR_OK;
4573  if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */
4574  if (dcl == 1) res = FR_INT_ERR;
4575  if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
4576  if (res == FR_OK) res = sync_window(fs); /* Flush FAT */
4577  tm = GET_FATTIME();
4578  if (res == FR_OK) { /* Initialize the new directory table */
4579  dsc = clust2sect(fs, dcl);
4580  dir = fs->win;
4581  mem_set(dir, 0, SS(fs));
4582  if (!_FS_EXFAT || fs->fs_type != FS_EXFAT) {
4583  mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */
4584  dir[DIR_Name] = '.';
4585  dir[DIR_Attr] = AM_DIR;
4586  st_dword(dir + DIR_ModTime, tm);
4587  st_clust(fs, dir, dcl);
4588  mem_cpy(dir + SZDIRE, dir, SZDIRE); /* Create ".." entry */
4589  dir[SZDIRE + 1] = '.'; pcl = dj.obj.sclust;
4590  if (fs->fs_type == FS_FAT32 && pcl == fs->dirbase) pcl = 0;
4591  st_clust(fs, dir + SZDIRE, pcl);
4592  }
4593  for (n = fs->csize; n; n--) { /* Write dot entries and clear following sectors */
4594  fs->winsect = dsc++;
4595  fs->wflag = 1;
4596  res = sync_window(fs);
4597  if (res != FR_OK) break;
4598  mem_set(dir, 0, SS(fs));
4599  }
4600  }
4601  if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */
4602  if (res == FR_OK) {
4603 #if _FS_EXFAT
4604  if (fs->fs_type == FS_EXFAT) { /* Initialize directory entry block */
4605  st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Created time */
4606  st_dword(fs->dirbuf + XDIR_FstClus, dcl); /* Table start cluster */
4607  st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)dj.obj.objsize); /* File size needs to be valid */
4608  st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)dj.obj.objsize);
4609  fs->dirbuf[XDIR_GenFlags] = 3; /* Initialize the object flag (contiguous) */
4610  fs->dirbuf[XDIR_Attr] = AM_DIR; /* Attribute */
4611  res = store_xdir(&dj);
4612  } else
4613 #endif
4614  {
4615  dir = dj.dir;
4616  st_dword(dir + DIR_ModTime, tm); /* Created time */
4617  st_clust(fs, dir, dcl); /* Table start cluster */
4618  dir[DIR_Attr] = AM_DIR; /* Attribute */
4619  fs->wflag = 1;
4620  }
4621  if (res == FR_OK) res = sync_fs(fs);
4622  } else {
4623  remove_chain(&dj.obj, dcl, 0); /* Could not register, remove cluster chain */
4624  }
4625  }
4626  FREE_NAMBUF();
4627  }
4628 
4629  LEAVE_FF(fs, res);
4630 }
4631 
4632 
4633 
4634 
4635 /*-----------------------------------------------------------------------*/
4636 /* Rename a File/Directory */
4637 /*-----------------------------------------------------------------------*/
4638 
4639 FRESULT f_rename (
4640  const TCHAR* path_old, /* Pointer to the object name to be renamed */
4641  const TCHAR* path_new /* Pointer to the new name */
4642 )
4643 {
4644  FRESULT res;
4645  DIR djo, djn;
4646  FATFS *fs;
4647  BYTE buf[_FS_EXFAT ? SZDIRE * 2 : 24], *dir;
4648  DWORD dw;
4649  DEF_NAMBUF
4650 
4651 
4652  get_ldnumber(&path_new); /* Ignore drive number of new name */
4653  res = find_volume(&path_old, &fs, FA_WRITE); /* Get logical drive of the old object */
4654  if (res == FR_OK) {
4655  djo.obj.fs = fs;
4656  INIT_NAMBUF(fs);
4657  res = follow_path(&djo, path_old); /* Check old object */
4658  if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check validity of name */
4659 #if _FS_LOCK != 0
4660  if (res == FR_OK) res = chk_lock(&djo, 2);
4661 #endif
4662  if (res == FR_OK) { /* Object to be renamed is found */
4663 #if _FS_EXFAT
4664  if (fs->fs_type == FS_EXFAT) { /* At exFAT */
4665  BYTE nf, nn;
4666  WORD nh;
4667 
4668  mem_cpy(buf, fs->dirbuf, SZDIRE * 2); /* Save 85+C0 entry of old object */
4669  mem_cpy(&djn, &djo, sizeof djo);
4670  res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */
4671  if (res == FR_OK) { /* Is new name already in use by any other object? */
4672  res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
4673  }
4674  if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
4675  res = dir_register(&djn); /* Register the new entry */
4676  if (res == FR_OK) {
4677  nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName];
4678  nh = ld_word(fs->dirbuf + XDIR_NameHash);
4679  mem_cpy(fs->dirbuf, buf, SZDIRE * 2);
4680  fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn;
4681  st_word(fs->dirbuf + XDIR_NameHash, nh);
4682 /* Start of critical section where any interruption can cause a cross-link */
4683  res = store_xdir(&djn);
4684  }
4685  }
4686  } else
4687 #endif
4688  { /* At FAT12/FAT16/FAT32 */
4689  mem_cpy(buf, djo.dir + DIR_Attr, 21); /* Save information about the object except name */
4690  mem_cpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */
4691  res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */
4692  if (res == FR_OK) { /* Is new name already in use by any other object? */
4693  res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
4694  }
4695  if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
4696  res = dir_register(&djn); /* Register the new entry */
4697  if (res == FR_OK) {
4698  dir = djn.dir; /* Copy information about object except name */
4699  mem_cpy(dir + 13, buf + 2, 19);
4700  dir[DIR_Attr] = buf[0] | AM_ARC;
4701  fs->wflag = 1;
4702  if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) { /* Update .. entry in the sub-directory if needed */
4703  dw = clust2sect(fs, ld_clust(fs, dir));
4704  if (!dw) {
4705  res = FR_INT_ERR;
4706  } else {
4707 /* Start of critical section where any interruption can cause a cross-link */
4708  res = move_window(fs, dw);
4709  dir = fs->win + SZDIRE * 1; /* Ptr to .. entry */
4710  if (res == FR_OK && dir[1] == '.') {
4711  st_clust(fs, dir, djn.obj.sclust);
4712  fs->wflag = 1;
4713  }
4714  }
4715  }
4716  }
4717  }
4718  }
4719  if (res == FR_OK) {
4720  res = dir_remove(&djo); /* Remove old entry */
4721  if (res == FR_OK) {
4722  res = sync_fs(fs);
4723  }
4724  }
4725 /* End of critical section */
4726  }
4727  FREE_NAMBUF();
4728  }
4729 
4730  LEAVE_FF(fs, res);
4731 }
4732 
4733 #endif /* !_FS_READONLY */
4734 #endif /* _FS_MINIMIZE == 0 */
4735 #endif /* _FS_MINIMIZE <= 1 */
4736 #endif /* _FS_MINIMIZE <= 2 */
4737 
4738 
4739 
4740 #if _USE_CHMOD && !_FS_READONLY
4741 /*-----------------------------------------------------------------------*/
4742 /* Change Attribute */
4743 /*-----------------------------------------------------------------------*/
4744 
4745 FRESULT f_chmod (
4746  const TCHAR* path, /* Pointer to the file path */
4747  BYTE attr, /* Attribute bits */
4748  BYTE mask /* Attribute mask to change */
4749 )
4750 {
4751  FRESULT res;
4752  DIR dj;
4753  FATFS *fs;
4754  DEF_NAMBUF
4755 
4756 
4757  res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */
4758  dj.obj.fs = fs;
4759  if (res == FR_OK) {
4760  INIT_NAMBUF(fs);
4761  res = follow_path(&dj, path); /* Follow the file path */
4762  if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */
4763  if (res == FR_OK) {
4764  mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
4765 #if _FS_EXFAT
4766  if (fs->fs_type == FS_EXFAT) {
4767  fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask); /* Apply attribute change */
4768  res = store_xdir(&dj);
4769  } else
4770 #endif
4771  {
4772  dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
4773  fs->wflag = 1;
4774  }
4775  if (res == FR_OK) res = sync_fs(fs);
4776  }
4777  FREE_NAMBUF();
4778  }
4779 
4780  LEAVE_FF(fs, res);
4781 }
4782 
4783 
4784 
4785 
4786 /*-----------------------------------------------------------------------*/
4787 /* Change Timestamp */
4788 /*-----------------------------------------------------------------------*/
4789 
4790 FRESULT f_utime (
4791  const TCHAR* path, /* Pointer to the file/directory name */
4792  const FILINFO* fno /* Pointer to the time stamp to be set */
4793 )
4794 {
4795  FRESULT res;
4796  DIR dj;
4797  FATFS *fs;
4798  DEF_NAMBUF
4799 
4800 
4801  res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */
4802  dj.obj.fs = fs;
4803  if (res == FR_OK) {
4804  INIT_NAMBUF(fs);
4805  res = follow_path(&dj, path); /* Follow the file path */
4806  if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */
4807  if (res == FR_OK) {
4808 #if _FS_EXFAT
4809  if (fs->fs_type == FS_EXFAT) {
4810  st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
4811  res = store_xdir(&dj);
4812  } else
4813 #endif
4814  {
4815  st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
4816  fs->wflag = 1;
4817  }
4818  if (res == FR_OK) res = sync_fs(fs);
4819  }
4820  FREE_NAMBUF();
4821  }
4822 
4823  LEAVE_FF(fs, res);
4824 }
4825 
4826 #endif /* _USE_CHMOD && !_FS_READONLY */
4827 
4828 
4829 
4830 #if _USE_LABEL
4831 /*-----------------------------------------------------------------------*/
4832 /* Get Volume Label */
4833 /*-----------------------------------------------------------------------*/
4834 
4835 FRESULT f_getlabel (
4836  const TCHAR* path, /* Path name of the logical drive number */
4837  TCHAR* label, /* Pointer to a buffer to return the volume label */
4838  DWORD* vsn /* Pointer to a variable to return the volume serial number */
4839 )
4840 {
4841  FRESULT res;
4842  DIR dj;
4843  FATFS *fs;
4844  UINT si, di;
4845 #if _LFN_UNICODE || _FS_EXFAT
4846  WCHAR w;
4847 #endif
4848 
4849  /* Get logical drive */
4850  res = find_volume(&path, &fs, 0);
4851 
4852  /* Get volume label */
4853  if (res == FR_OK && label) {
4854  dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */
4855  res = dir_sdi(&dj, 0);
4856  if (res == FR_OK) {
4857  res = dir_read(&dj, 1); /* Find a volume label entry */
4858  if (res == FR_OK) {
4859 #if _FS_EXFAT
4860  if (fs->fs_type == FS_EXFAT) {
4861  for (si = di = 0; si < dj.dir[XDIR_NumLabel]; si++) { /* Extract volume label from 83 entry */
4862  w = ld_word(dj.dir + XDIR_Label + si * 2);
4863 #if _LFN_UNICODE
4864  label[di++] = w;
4865 #else
4866  w = ff_convert(w, 0); /* Unicode -> OEM */
4867  if (w == 0) w = '?'; /* Replace wrong character */
4868  if (_DF1S && w >= 0x100) label[di++] = (char)(w >> 8);
4869  label[di++] = (char)w;
4870 #endif
4871  }
4872  label[di] = 0;
4873  } else
4874 #endif
4875  {
4876  si = di = 0; /* Extract volume label from AM_VOL entry with code comversion */
4877  do {
4878 #if _LFN_UNICODE
4879  w = (si < 11) ? dj.dir[si++] : ' ';
4880  if (IsDBCS1(w) && si < 11 && IsDBCS2(dj.dir[si])) {
4881  w = w << 8 | dj.dir[si++];
4882  }
4883  label[di++] = ff_convert(w, 1); /* OEM -> Unicode */
4884 #else
4885  label[di++] = dj.dir[si++];
4886 #endif
4887  } while (di < 11);
4888  do { /* Truncate trailing spaces */
4889  label[di] = 0;
4890  if (di == 0) break;
4891  } while (label[--di] == ' ');
4892  }
4893  }
4894  }
4895  if (res == FR_NO_FILE) { /* No label entry and return nul string */
4896  label[0] = 0;
4897  res = FR_OK;
4898  }
4899  }
4900 
4901  /* Get volume serial number */
4902  if (res == FR_OK && vsn) {
4903  res = move_window(fs, fs->volbase);
4904  if (res == FR_OK) {
4905  switch (fs->fs_type) {
4906  case FS_EXFAT: di = BPB_VolIDEx; break;
4907  case FS_FAT32: di = BS_VolID32; break;
4908  default: di = BS_VolID;
4909  }
4910  *vsn = ld_dword(fs->win + di);
4911  }
4912  }
4913 
4914  LEAVE_FF(fs, res);
4915 }
4916 
4917 
4918 
4919 #if !_FS_READONLY
4920 /*-----------------------------------------------------------------------*/
4921 /* Set Volume Label */
4922 /*-----------------------------------------------------------------------*/
4923 
4924 FRESULT f_setlabel (
4925  const TCHAR* label /* Pointer to the volume label to set */
4926 )
4927 {
4928  FRESULT res;
4929  DIR dj;
4930  FATFS *fs;
4931  BYTE dirvn[22];
4932  UINT i, j, slen;
4933  WCHAR w;
4934  static const char badchr[] = "\"*+,.:;<=>\?[]|\x7F";
4935 
4936 
4937  /* Get logical drive */
4938  res = find_volume(&label, &fs, FA_WRITE);
4939  if (res != FR_OK) LEAVE_FF(fs, res);
4940  dj.obj.fs = fs;
4941 
4942  /* Get length of given volume label */
4943  for (slen = 0; (UINT)label[slen] >= ' '; slen++) ; /* Get name length */
4944 
4945 #if _FS_EXFAT
4946  if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
4947  for (i = j = 0; i < slen; ) { /* Create volume label in directory form */
4948  w = label[i++];
4949 #if !_LFN_UNICODE
4950  if (IsDBCS1(w)) {
4951  w = (i < slen && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;
4952  }
4953  w = ff_convert(w, 1);
4954 #endif
4955  if (w == 0 || chk_chr(badchr, w) || j == 22) { /* Check validity check validity of the volume label */
4956  LEAVE_FF(fs, FR_INVALID_NAME);
4957  }
4958  st_word(dirvn + j, w); j += 2;
4959  }
4960  slen = j;
4961  } else
4962 #endif
4963  { /* On the FAT12/16/32 volume */
4964  for ( ; slen && label[slen - 1] == ' '; slen--) ; /* Remove trailing spaces */
4965  if (slen) { /* Is there a volume label to be set? */
4966  dirvn[0] = 0; i = j = 0; /* Create volume label in directory form */
4967  do {
4968 #if _LFN_UNICODE
4969  w = ff_convert(ff_wtoupper(label[i++]), 0);
4970 #else
4971  w = (BYTE)label[i++];
4972  if (IsDBCS1(w)) {
4973  w = (j < 10 && i < slen && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;
4974  }
4975 #if _USE_LFN != 0
4976  w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0);
4977 #else
4978  if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */
4979 #ifdef _EXCVT
4980  if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */
4981 #else
4982  if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */
4983 #endif
4984 #endif
4985 #endif
4986  if (w == 0 || chk_chr(badchr, w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) { /* Reject invalid characters for volume label */
4987  LEAVE_FF(fs, FR_INVALID_NAME);
4988  }
4989  if (w >= 0x100) dirvn[j++] = (BYTE)(w >> 8);
4990  dirvn[j++] = (BYTE)w;
4991  } while (i < slen);
4992  while (j < 11) dirvn[j++] = ' '; /* Fill remaining name field */
4993  if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */
4994  }
4995  }
4996 
4997  /* Set volume label */
4998  dj.obj.sclust = 0; /* Open root directory */
4999  res = dir_sdi(&dj, 0);
5000  if (res == FR_OK) {
5001  res = dir_read(&dj, 1); /* Get volume label entry */
5002  if (res == FR_OK) {
5003  if (_FS_EXFAT && fs->fs_type == FS_EXFAT) {
5004  dj.dir[XDIR_NumLabel] = (BYTE)(slen / 2); /* Change the volume label */
5005  mem_cpy(dj.dir + XDIR_Label, dirvn, slen);
5006  } else {
5007  if (slen) {
5008  mem_cpy(dj.dir, dirvn, 11); /* Change the volume label */
5009  } else {
5010  dj.dir[DIR_Name] = DDEM; /* Remove the volume label */
5011  }
5012  }
5013  fs->wflag = 1;
5014  res = sync_fs(fs);
5015  } else { /* No volume label entry is found or error */
5016  if (res == FR_NO_FILE) {
5017  res = FR_OK;
5018  if (slen) { /* Create a volume label entry */
5019  res = dir_alloc(&dj, 1); /* Allocate an entry */
5020  if (res == FR_OK) {
5021  mem_set(dj.dir, 0, SZDIRE); /* Clear the entry */
5022  if (_FS_EXFAT && fs->fs_type == FS_EXFAT) {
5023  dj.dir[XDIR_Type] = 0x83; /* Create 83 entry */
5024  dj.dir[XDIR_NumLabel] = (BYTE)(slen / 2);
5025  mem_cpy(dj.dir + XDIR_Label, dirvn, slen);
5026  } else {
5027  dj.dir[DIR_Attr] = AM_VOL; /* Create volume label entry */
5028  mem_cpy(dj.dir, dirvn, 11);
5029  }
5030  fs->wflag = 1;
5031  res = sync_fs(fs);
5032  }
5033  }
5034  }
5035  }
5036  }
5037 
5038  LEAVE_FF(fs, res);
5039 }
5040 
5041 #endif /* !_FS_READONLY */
5042 #endif /* _USE_LABEL */
5043 
5044 
5045 
5046 #if _USE_EXPAND && !_FS_READONLY
5047 /*-----------------------------------------------------------------------*/
5048 /* Allocate a Contiguous Blocks to the File */
5049 /*-----------------------------------------------------------------------*/
5050 
5051 FRESULT f_expand (
5052  FIL* fp, /* Pointer to the file object */
5053  FSIZE_t fsz, /* File size to be expanded to */
5054  BYTE opt /* Operation mode 0:Find and prepare or 1:Find and allocate */
5055 )
5056 {
5057  FRESULT res;
5058  FATFS *fs;
5059  DWORD n, clst, stcl, scl, ncl, tcl, lclst;
5060 
5061 
5062  res = validate(&fp->obj, &fs); /* Check validity of the file object */
5063  if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
5064  if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);
5065 #if _FS_EXFAT
5066  if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED); /* Check if in size limit */
5067 #endif
5068  n = (DWORD)fs->csize * SS(fs); /* Cluster size */
5069  tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0); /* Number of clusters required */
5070  stcl = fs->last_clst; lclst = 0;
5071  if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2;
5072 
5073 #if _FS_EXFAT
5074  if (fs->fs_type == FS_EXFAT) {
5075  scl = find_bitmap(fs, stcl, tcl); /* Find a contiguous cluster block */
5076  if (scl == 0) res = FR_DENIED; /* No contiguous cluster block was found */
5077  if (scl == 0xFFFFFFFF) res = FR_DISK_ERR;
5078  if (res == FR_OK) {
5079  if (opt) {
5080  res = change_bitmap(fs, scl, tcl, 1); /* Mark the cluster block 'in use' */
5081  lclst = scl + tcl - 1;
5082  } else {
5083  lclst = scl - 1;
5084  }
5085  }
5086  } else
5087 #endif
5088  {
5089  scl = clst = stcl; ncl = 0;
5090  for (;;) { /* Find a contiguous cluster block */
5091  n = get_fat(&fp->obj, clst);
5092  if (++clst >= fs->n_fatent) clst = 2;
5093  if (n == 1) { res = FR_INT_ERR; break; }
5094  if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
5095  if (n == 0) { /* Is it a free cluster? */
5096  if (++ncl == tcl) break; /* Break if a contiguous cluster block is found */
5097  } else {
5098  scl = clst; ncl = 0; /* Not a free cluster */
5099  }
5100  if (clst == stcl) { res = FR_DENIED; break; } /* No contiguous cluster? */
5101  }
5102  if (res == FR_OK) {
5103  if (opt) {
5104  for (clst = scl, n = tcl; n; clst++, n--) { /* Create a cluster chain on the FAT */
5105  res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1);
5106  if (res != FR_OK) break;
5107  lclst = clst;
5108  }
5109  } else {
5110  lclst = scl - 1;
5111  }
5112  }
5113  }
5114 
5115  if (res == FR_OK) {
5116  fs->last_clst = lclst; /* Set suggested start cluster to start next */
5117  if (opt) {
5118  fp->obj.sclust = scl; /* Update object allocation information */
5119  fp->obj.objsize = fsz;
5120  if (_FS_EXFAT) fp->obj.stat = 2; /* Set status 'contiguous chain' */
5121  fp->flag |= FA_MODIFIED;
5122  if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */
5123  fs->free_clst -= tcl;
5124  fs->fsi_flag |= 1;
5125  }
5126  }
5127  }
5128 
5129  LEAVE_FF(fs, res);
5130 }
5131 
5132 #endif /* _USE_EXPAND && !_FS_READONLY */
5133 
5134 
5135 
5136 #if _USE_FORWARD
5137 /*-----------------------------------------------------------------------*/
5138 /* Forward data to the stream directly */
5139 /*-----------------------------------------------------------------------*/
5140 
5141 FRESULT f_forward (
5142  FIL* fp, /* Pointer to the file object */
5143  UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
5144  UINT btf, /* Number of bytes to forward */
5145  UINT* bf /* Pointer to number of bytes forwarded */
5146 )
5147 {
5148  FRESULT res;
5149  FATFS *fs;
5150  DWORD clst, sect;
5151  FSIZE_t remain;
5152  UINT rcnt, csect;
5153  BYTE *dbuf;
5154 
5155 
5156  *bf = 0; /* Clear transfer byte counter */
5157  res = validate(&fp->obj, &fs); /* Check validity of the file object */
5158  if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
5159  if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
5160 
5161  remain = fp->obj.objsize - fp->fptr;
5162  if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
5163 
5164  for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream goes busy */
5165  fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
5166  csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */
5167  if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
5168  if (csect == 0) { /* On the cluster boundary? */
5169  clst = (fp->fptr == 0) ? /* On the top of the file? */
5170  fp->obj.sclust : get_fat(&fp->obj, fp->clust);
5171  if (clst <= 1) ABORT(fs, FR_INT_ERR);
5172  if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
5173  fp->clust = clst; /* Update current cluster */
5174  }
5175  }
5176  sect = clust2sect(fs, fp->clust); /* Get current data sector */
5177  if (!sect) ABORT(fs, FR_INT_ERR);
5178  sect += csect;
5179 #if _FS_TINY
5180  if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window to the file data */
5181  dbuf = fs->win;
5182 #else
5183  if (fp->sect != sect) { /* Fill sector cache with file data */
5184 #if !_FS_READONLY
5185  if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
5186  if (disk_write(fs->drv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
5187  fp->flag &= (BYTE)~FA_DIRTY;
5188  }
5189 #endif
5190  if (disk_read(fs->drv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
5191  }
5192  dbuf = fp->buf;
5193 #endif
5194  fp->sect = sect;
5195  rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */
5196  if (rcnt > btf) rcnt = btf; /* Clip it by btr if needed */
5197  rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt); /* Forward the file data */
5198  if (!rcnt) ABORT(fs, FR_INT_ERR);
5199  }
5200 
5201  LEAVE_FF(fs, FR_OK);
5202 }
5203 #endif /* _USE_FORWARD */
5204 
5205 
5206 
5207 #if _USE_MKFS && !_FS_READONLY
5208 /*-----------------------------------------------------------------------*/
5209 /* Create FAT file system on the logical drive */
5210 /*-----------------------------------------------------------------------*/
5211 
5212 FRESULT f_mkfs (
5213  const TCHAR* path, /* Logical drive number */
5214  BYTE opt, /* Format option */
5215  DWORD au, /* Size of allocation unit [byte] */
5216  void* work, /* Pointer to working buffer */
5217  UINT len /* Size of working buffer */
5218 )
5219 {
5220  const UINT n_fats = 1; /* Number of FATs for FAT12/16/32 volume (1 or 2) */
5221  const UINT n_rootdir = 512; /* Number of root directory entries for FAT12/16 volume */
5222  static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0}; /* Cluster size boundary for FAT12/16 volume (4Ks unit) */
5223  static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0}; /* Cluster size boundary for FAT32 volume (128Ks unit) */
5224  BYTE fmt, sys, *buf, *pte, pdrv, part;
5225  WORD ss;
5226  DWORD szb_buf, sz_buf, sz_blk, n_clst, pau, sect, nsect, n;
5227  DWORD b_vol, b_fat, b_data; /* Base LBA for volume, fat, data */
5228  DWORD sz_vol, sz_rsv, sz_fat, sz_dir; /* Size for volume, fat, dir, data */
5229  UINT i;
5230  int vol;
5231  DSTATUS stat;
5232 #if _USE_TRIM || _FS_EXFAT
5233  DWORD tbl[3];
5234 #endif
5235 
5236 
5237  /* Check mounted drive and clear work area */
5238  vol = get_ldnumber(&path); /* Get target logical drive */
5239  if (vol < 0) return FR_INVALID_DRIVE;
5240  if (FatFs[vol]) FatFs[vol]->fs_type = 0; /* Clear mounted volume */
5241  pdrv = LD2PD(vol); /* Physical drive */
5242  part = LD2PT(vol); /* Partition (0:create as new, 1-4:get from partition table) */
5243 
5244  /* Check physical drive status */
5245  stat = disk_initialize(pdrv);
5246  if (stat & STA_NOINIT) return FR_NOT_READY;
5247  if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
5248  if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &sz_blk) != RES_OK || !sz_blk || sz_blk > 32768 || (sz_blk & (sz_blk - 1))) sz_blk = 1; /* Erase block to align data area */
5249 #if _MAX_SS != _MIN_SS /* Get sector size of the medium */
5250  if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR;
5251  if (ss > _MAX_SS || ss < _MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;
5252 #else
5253  ss = _MAX_SS;
5254 #endif
5255  if ((au != 0 && au < ss) || au > 0x1000000 || (au & (au - 1))) return FR_INVALID_PARAMETER; /* Check if au is valid */
5256  au /= ss; /* Cluster size in unit of sector */
5257 
5258  /* Get working buffer */
5259  buf = (BYTE*)work; /* Working buffer */
5260  sz_buf = len / ss; /* Size of working buffer (sector) */
5261  szb_buf = sz_buf * ss; /* Size of working buffer (byte) */
5262  if (!szb_buf) return FR_MKFS_ABORTED;
5263 
5264  /* Determine where the volume to be located (b_vol, sz_vol) */
5265  if (_MULTI_PARTITION && part != 0) {
5266  /* Get partition information from partition table in the MBR */
5267  if (disk_read(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Load MBR */
5268  if (ld_word(buf + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED; /* Check if MBR is valid */
5269  pte = buf + (MBR_Table + (part - 1) * SZ_PTE);
5270  if (!pte[PTE_System]) return FR_MKFS_ABORTED; /* No partition? */
5271  b_vol = ld_dword(pte + PTE_StLba); /* Get volume start sector */
5272  sz_vol = ld_dword(pte + PTE_SizLba); /* Get volume size */
5273  } else {
5274  /* Create a single-partition in this function */
5275  if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) return FR_DISK_ERR;
5276  b_vol = (opt & FM_SFD) ? 0 : 63; /* Volume start sector */
5277  if (sz_vol < b_vol) return FR_MKFS_ABORTED;
5278  sz_vol -= b_vol; /* Volume size */
5279  }
5280  if (sz_vol < 128) return FR_MKFS_ABORTED; /* Check if volume size is >=128s */
5281 
5282  /* Pre-determine the FAT type */
5283  do {
5284  if (_FS_EXFAT && (opt & FM_EXFAT)) { /* exFAT possible? */
5285  if ((opt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || au > 128) { /* exFAT only, vol >= 64Ms or au > 128s ? */
5286  fmt = FS_EXFAT; break;
5287  }
5288  }
5289  if (au > 128) return FR_INVALID_PARAMETER; /* Too large au for FAT/FAT32 */
5290  if (opt & FM_FAT32) { /* FAT32 possible? */
5291  if ((opt & FM_ANY) == FM_FAT32 || !(opt & FM_FAT)) { /* FAT32 only or no-FAT? */
5292  fmt = FS_FAT32; break;
5293  }
5294  }
5295  if (!(opt & FM_FAT)) return FR_INVALID_PARAMETER; /* no-FAT? */
5296  fmt = FS_FAT16;
5297  } while (0);
5298 
5299 #if _FS_EXFAT
5300  if (fmt == FS_EXFAT) { /* Create an exFAT volume */
5301  DWORD szb_bit, szb_case, sum, nb, cl;
5302  WCHAR ch, si;
5303  UINT j, st;
5304  BYTE b;
5305 
5306  if (sz_vol < 0x1000) return FR_MKFS_ABORTED; /* Too small volume? */
5307 #if _USE_TRIM
5308  tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area can be erased */
5309  disk_ioctl(pdrv, CTRL_TRIM, tbl);
5310 #endif
5311  /* Determine FAT location, data location and number of clusters */
5312  if (!au) { /* au auto-selection */
5313  au = 8;
5314  if (sz_vol >= 0x80000) au = 64; /* >= 512Ks */
5315  if (sz_vol >= 0x4000000) au = 256; /* >= 64Ms */
5316  }
5317  b_fat = b_vol + 32; /* FAT start at offset 32 */
5318  sz_fat = ((sz_vol / au + 2) * 4 + ss - 1) / ss; /* Number of FAT sectors */
5319  b_data = (b_fat + sz_fat + sz_blk - 1) & ~(sz_blk - 1); /* Align data area to the erase block boundary */
5320  if (b_data >= sz_vol / 2) return FR_MKFS_ABORTED; /* Too small volume? */
5321  n_clst = (sz_vol - (b_data - b_vol)) / au; /* Number of clusters */
5322  if (n_clst <16) return FR_MKFS_ABORTED; /* Too few clusters? */
5323  if (n_clst > MAX_EXFAT) return FR_MKFS_ABORTED; /* Too many clusters? */
5324 
5325  szb_bit = (n_clst + 7) / 8; /* Size of allocation bitmap */
5326  tbl[0] = (szb_bit + au * ss - 1) / (au * ss); /* Number of allocation bitmap clusters */
5327 
5328  /* Create a compressed up-case table */
5329  sect = b_data + au * tbl[0]; /* Table start sector */
5330  sum = 0; /* Table checksum to be stored in the 82 entry */
5331  st = si = i = j = szb_case = 0;
5332  do {
5333  switch (st) {
5334  case 0:
5335  ch = ff_wtoupper(si); /* Get an up-case char */
5336  if (ch != si) {
5337  si++; break; /* Store the up-case char if exist */
5338  }
5339  for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ; /* Get run length of no-case block */
5340  if (j >= 128) {
5341  ch = 0xFFFF; st = 2; break; /* Compress the no-case block if run is >= 128 */
5342  }
5343  st = 1; /* Do not compress short run */
5344  /* continue */
5345  case 1:
5346  ch = si++; /* Fill the short run */
5347  if (--j == 0) st = 0;
5348  break;
5349  default:
5350  ch = (WCHAR)j; si += j; /* Number of chars to skip */
5351  st = 0;
5352  }
5353  sum = xsum32(buf[i + 0] = (BYTE)ch, sum); /* Put it into the write buffer */
5354  sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum);
5355  i += 2; szb_case += 2;
5356  if (!si || i == szb_buf) { /* Write buffered data when buffer full or end of process */
5357  n = (i + ss - 1) / ss;
5358  if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;
5359  sect += n; i = 0;
5360  }
5361  } while (si);
5362  tbl[1] = (szb_case + au * ss - 1) / (au * ss); /* Number of up-case table clusters */
5363  tbl[2] = 1; /* Number of root dir clusters */
5364 
5365  /* Initialize the allocation bitmap */
5366  sect = b_data; nsect = (szb_bit + ss - 1) / ss; /* Start of bitmap and number of sectors */
5367  nb = tbl[0] + tbl[1] + tbl[2]; /* Number of clusters in-use by system */
5368  do {
5369  mem_set(buf, 0, szb_buf);
5370  for (i = 0; nb >= 8 && i < szb_buf; buf[i++] = 0xFF, nb -= 8) ;
5371  for (b = 1; nb && i < szb_buf; buf[i] |= b, b <<= 1, nb--) ;
5372  n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */
5373  if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;
5374  sect += n; nsect -= n;
5375  } while (nsect);
5376 
5377  /* Initialize the FAT */
5378  sect = b_fat; nsect = sz_fat; /* Start of FAT and number of FAT sectors */
5379  j = nb = cl = 0;
5380  do {
5381  mem_set(buf, 0, szb_buf); i = 0; /* Clear work area and reset write index */
5382  if (cl == 0) { /* Set entry 0 and 1 */
5383  st_dword(buf + i, 0xFFFFFFF8); i += 4; cl++;
5384  st_dword(buf + i, 0xFFFFFFFF); i += 4; cl++;
5385  }
5386  do { /* Create chains of bitmap, up-case and root dir */
5387  while (nb && i < szb_buf) { /* Create a chain */
5388  st_dword(buf + i, (nb > 1) ? cl + 1 : 0xFFFFFFFF);
5389  i += 4; cl++; nb--;
5390  }
5391  if (!nb && j < 3) nb = tbl[j++]; /* Next chain */
5392  } while (nb && i < szb_buf);
5393  n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */
5394  if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;
5395  sect += n; nsect -= n;
5396  } while (nsect);
5397 
5398  /* Initialize the root directory */
5399  mem_set(buf, 0, szb_buf);
5400  buf[SZDIRE * 0 + 0] = 0x83; /* 83 entry (volume label) */
5401  buf[SZDIRE * 1 + 0] = 0x81; /* 81 entry (allocation bitmap) */
5402  st_dword(buf + SZDIRE * 1 + 20, 2);
5403  st_dword(buf + SZDIRE * 1 + 24, szb_bit);
5404  buf[SZDIRE * 2 + 0] = 0x82; /* 82 entry (up-case table) */
5405  st_dword(buf + SZDIRE * 2 + 4, sum);
5406  st_dword(buf + SZDIRE * 2 + 20, 2 + tbl[0]);
5407  st_dword(buf + SZDIRE * 2 + 24, szb_case);
5408  sect = b_data + au * (tbl[0] + tbl[1]); nsect = au; /* Start of the root directory and number of sectors */
5409  do { /* Fill root directory sectors */
5410  n = (nsect > sz_buf) ? sz_buf : nsect;
5411  if (disk_write(pdrv, buf, sect, n) != RES_OK) return FR_DISK_ERR;
5412  mem_set(buf, 0, ss);
5413  sect += n; nsect -= n;
5414  } while (nsect);
5415 
5416  /* Create two set of the exFAT VBR blocks */
5417  sect = b_vol;
5418  for (n = 0; n < 2; n++) {
5419  /* Main record (+0) */
5420  mem_set(buf, 0, ss);
5421  mem_cpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11); /* Boot jump code (x86), OEM name */
5422  st_dword(buf + BPB_VolOfsEx, b_vol); /* Volume offset in the physical drive [sector] */
5423  st_dword(buf + BPB_TotSecEx, sz_vol); /* Volume size [sector] */
5424  st_dword(buf + BPB_FatOfsEx, b_fat - b_vol); /* FAT offset [sector] */
5425  st_dword(buf + BPB_FatSzEx, sz_fat); /* FAT size [sector] */
5426  st_dword(buf + BPB_DataOfsEx, b_data - b_vol); /* Data offset [sector] */
5427  st_dword(buf + BPB_NumClusEx, n_clst); /* Number of clusters */
5428  st_dword(buf + BPB_RootClusEx, 2 + tbl[0] + tbl[1]); /* Root dir cluster # */
5429  st_dword(buf + BPB_VolIDEx, GET_FATTIME()); /* VSN */
5430  st_word(buf + BPB_FSVerEx, 0x100); /* File system version (1.00) */
5431  for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ; /* Log2 of sector size [byte] */
5432  for (buf[BPB_SecPerClusEx] = 0, i = au; i >>= 1; buf[BPB_SecPerClusEx]++) ; /* Log2 of cluster size [sector] */
5433  buf[BPB_NumFATsEx] = 1; /* Number of FATs */
5434  buf[BPB_DrvNumEx] = 0x80; /* Drive number (for int13) */
5435  st_word(buf + BS_BootCodeEx, 0xFEEB); /* Boot code (x86) */
5436  st_word(buf + BS_55AA, 0xAA55); /* Signature (placed here regardless of sector size) */
5437  for (i = sum = 0; i < ss; i++) { /* VBR checksum */
5438  if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum);
5439  }
5440  if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;
5441  /* Extended bootstrap record (+1..+8) */
5442  mem_set(buf, 0, ss);
5443  st_word(buf + ss - 2, 0xAA55); /* Signature (placed at end of sector) */
5444  for (j = 1; j < 9; j++) {
5445  for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */
5446  if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;
5447  }
5448  /* OEM/Reserved record (+9..+10) */
5449  mem_set(buf, 0, ss);
5450  for ( ; j < 11; j++) {
5451  for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */
5452  if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;
5453  }
5454  /* Sum record (+11) */
5455  for (i = 0; i < ss; i += 4) st_dword(buf + i, sum); /* Fill with checksum value */
5456  if (disk_write(pdrv, buf, sect++, 1) != RES_OK) return FR_DISK_ERR;
5457  }
5458 
5459  } else
5460 #endif /* _FS_EXFAT */
5461  { /* Create an FAT12/16/32 volume */
5462  do {
5463  pau = au;
5464  /* Pre-determine number of clusters and FAT sub-type */
5465  if (fmt == FS_FAT32) { /* FAT32 volume */
5466  if (!pau) { /* au auto-selection */
5467  n = sz_vol / 0x20000; /* Volume size in unit of 128KS */
5468  for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ; /* Get from table */
5469  }
5470  n_clst = sz_vol / pau; /* Number of clusters */
5471  sz_fat = (n_clst * 4 + 8 + ss - 1) / ss; /* FAT size [sector] */
5472  sz_rsv = 32; /* Number of reserved sectors */
5473  sz_dir = 0; /* No static directory */
5474  if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) return FR_MKFS_ABORTED;
5475  } else { /* FAT12/16 volume */
5476  if (!pau) { /* au auto-selection */
5477  n = sz_vol / 0x1000; /* Volume size in unit of 4KS */
5478  for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ; /* Get from table */
5479  }
5480  n_clst = sz_vol / pau;
5481  if (n_clst > MAX_FAT12) {
5482  n = n_clst * 2 + 4; /* FAT size [byte] */
5483  } else {
5484  fmt = FS_FAT12;
5485  n = (n_clst * 3 + 1) / 2 + 3; /* FAT size [byte] */
5486  }
5487  sz_fat = (n + ss - 1) / ss; /* FAT size [sector] */
5488  sz_rsv = 1; /* Number of reserved sectors */
5489  sz_dir = (DWORD)n_rootdir * SZDIRE / ss; /* Rootdir size [sector] */
5490  }
5491  b_fat = b_vol + sz_rsv; /* FAT base */
5492  b_data = b_fat + sz_fat * n_fats + sz_dir; /* Data base */
5493 
5494  /* Align data base to erase block boundary (for flash memory media) */
5495  n = ((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data; /* Next nearest erase block from current data base */
5496  if (fmt == FS_FAT32) { /* FAT32: Move FAT base */
5497  sz_rsv += n; b_fat += n;
5498  } else { /* FAT12/16: Expand FAT size */
5499  sz_fat += n / n_fats;
5500  }
5501 
5502  /* Determine number of clusters and final check of validity of the FAT sub-type */
5503  if (sz_vol < b_data + pau * 16 - b_vol) return FR_MKFS_ABORTED; /* Too small volume */
5504  n_clst = (sz_vol - sz_rsv - sz_fat * n_fats - sz_dir) / pau;
5505  if (fmt == FS_FAT32) {
5506  if (n_clst <= MAX_FAT16) { /* Too few clusters for FAT32 */
5507  if (!au && (au = pau / 2) != 0) continue; /* Adjust cluster size and retry */
5508  return FR_MKFS_ABORTED;
5509  }
5510  }
5511  if (fmt == FS_FAT16) {
5512  if (n_clst > MAX_FAT16) { /* Too many clusters for FAT16 */
5513  if (!au && (pau * 2) <= 64) {
5514  au = pau * 2; continue; /* Adjust cluster size and retry */
5515  }
5516  if ((opt & FM_FAT32)) {
5517  fmt = FS_FAT32; continue; /* Switch type to FAT32 and retry */
5518  }
5519  if (!au && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */
5520  return FR_MKFS_ABORTED;
5521  }
5522  if (n_clst <= MAX_FAT12) { /* Too few clusters for FAT16 */
5523  if (!au && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */
5524  return FR_MKFS_ABORTED;
5525  }
5526  }
5527  if (fmt == FS_FAT12 && n_clst > MAX_FAT12) return FR_MKFS_ABORTED; /* Too many clusters for FAT12 */
5528 
5529  /* Ok, it is the valid cluster configuration */
5530  break;
5531  } while (1);
5532 
5533 #if _USE_TRIM
5534  tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area can be erased */
5535  disk_ioctl(pdrv, CTRL_TRIM, tbl);
5536 #endif
5537  /* Create FAT VBR */
5538  mem_set(buf, 0, ss);
5539  mem_cpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code (x86), OEM name */
5540  st_word(buf + BPB_BytsPerSec, ss); /* Sector size [byte] */
5541  buf[BPB_SecPerClus] = (BYTE)pau; /* Cluster size [sector] */
5542  st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv); /* Size of reserved area */
5543  buf[BPB_NumFATs] = (BYTE)n_fats; /* Number of FATs */
5544  st_word(buf + BPB_RootEntCnt, (WORD)((fmt == FS_FAT32) ? 0 : n_rootdir)); /* Number of root directory entries */
5545  if (sz_vol < 0x10000) {
5546  st_word(buf + BPB_TotSec16, (WORD)sz_vol); /* Volume size in 16-bit LBA */
5547  } else {
5548  st_dword(buf + BPB_TotSec32, sz_vol); /* Volume size in 32-bit LBA */
5549  }
5550  buf[BPB_Media] = 0xF8; /* Media descriptor byte */
5551  st_word(buf + BPB_SecPerTrk, 63); /* Number of sectors per track (for int13) */
5552  st_word(buf + BPB_NumHeads, 255); /* Number of heads (for int13) */
5553  st_dword(buf + BPB_HiddSec, b_vol); /* Volume offset in the physical drive [sector] */
5554  if (fmt == FS_FAT32) {
5555  st_dword(buf + BS_VolID32, GET_FATTIME()); /* VSN */
5556  st_dword(buf + BPB_FATSz32, sz_fat); /* FAT size [sector] */
5557  st_dword(buf + BPB_RootClus32, 2); /* Root directory cluster # (2) */
5558  st_word(buf + BPB_FSInfo32, 1); /* Offset of FSINFO sector (VBR + 1) */
5559  st_word(buf + BPB_BkBootSec32, 6); /* Offset of backup VBR (VBR + 6) */
5560  buf[BS_DrvNum32] = 0x80; /* Drive number (for int13) */
5561  buf[BS_BootSig32] = 0x29; /* Extended boot signature */
5562  mem_cpy(buf + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
5563  } else {
5564  st_dword(buf + BS_VolID, GET_FATTIME()); /* VSN */
5565  st_word(buf + BPB_FATSz16, (WORD)sz_fat); /* FAT size [sector] */
5566  buf[BS_DrvNum] = 0x80; /* Drive number (for int13) */
5567  buf[BS_BootSig] = 0x29; /* Extended boot signature */
5568  mem_cpy(buf + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
5569  }
5570  st_word(buf + BS_55AA, 0xAA55); /* Signature (offset is fixed here regardless of sector size) */
5571  if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) return FR_DISK_ERR; /* Write it to the VBR sector */
5572 
5573  /* Create FSINFO record if needed */
5574  if (fmt == FS_FAT32) {
5575  disk_write(pdrv, buf, b_vol + 6, 1); /* Write backup VBR (VBR + 6) */
5576  mem_set(buf, 0, ss);
5577  st_dword(buf + FSI_LeadSig, 0x41615252);
5578  st_dword(buf + FSI_StrucSig, 0x61417272);
5579  st_dword(buf + FSI_Free_Count, n_clst - 1); /* Number of free clusters */
5580  st_dword(buf + FSI_Nxt_Free, 2); /* Last allocated cluster# */
5581  st_word(buf + BS_55AA, 0xAA55);
5582  disk_write(pdrv, buf, b_vol + 7, 1); /* Write backup FSINFO (VBR + 7) */
5583  disk_write(pdrv, buf, b_vol + 1, 1); /* Write original FSINFO (VBR + 1) */
5584  }
5585 
5586  /* Initialize FAT area */
5587  mem_set(buf, 0, (UINT)szb_buf);
5588  sect = b_fat; /* FAT start sector */
5589  for (i = 0; i < n_fats; i++) { /* Initialize FATs each */
5590  if (fmt == FS_FAT32) {
5591  st_dword(buf + 0, 0xFFFFFFF8); /* Entry 0 */
5592  st_dword(buf + 4, 0xFFFFFFFF); /* Entry 1 */
5593  st_dword(buf + 8, 0x0FFFFFFF); /* Entry 2 (root directory) */
5594  } else {
5595  st_dword(buf + 0, (fmt == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8); /* Entry 0 and 1 */
5596  }
5597  nsect = sz_fat; /* Number of FAT sectors */
5598  do { /* Fill FAT sectors */
5599  n = (nsect > sz_buf) ? sz_buf : nsect;
5600  if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) return FR_DISK_ERR;
5601  mem_set(buf, 0, ss);
5602  sect += n; nsect -= n;
5603  } while (nsect);
5604  }
5605 
5606  /* Initialize root directory (fill with zero) */
5607  nsect = (fmt == FS_FAT32) ? pau : sz_dir; /* Number of root directory sectors */
5608  do {
5609  n = (nsect > sz_buf) ? sz_buf : nsect;
5610  if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) return FR_DISK_ERR;
5611  sect += n; nsect -= n;
5612  } while (nsect);
5613  }
5614 
5615  /* Determine system ID in the partition table */
5616  if (_FS_EXFAT && fmt == FS_EXFAT) {
5617  sys = 0x07; /* HPFS/NTFS/exFAT */
5618  } else {
5619  if (fmt == FS_FAT32) {
5620  sys = 0x0C; /* FAT32X */
5621  } else {
5622  if (sz_vol >= 0x10000) {
5623  sys = 0x06; /* FAT12/16 (>=64KS) */
5624  } else {
5625  sys = (fmt == FS_FAT16) ? 0x04 : 0x01; /* FAT16 (<64KS) : FAT12 (<64KS) */
5626  }
5627  }
5628  }
5629 
5630  if (_MULTI_PARTITION && part != 0) {
5631  /* Update system ID in the partition table */
5632  if (disk_read(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Read the MBR */
5633  buf[MBR_Table + (part - 1) * SZ_PTE + PTE_System] = sys; /* Set system type */
5634  if (disk_write(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Write it back to the MBR */
5635  } else {
5636  if (!(opt & FM_SFD)) {
5637  /* Create partition table in FDISK format */
5638  mem_set(buf, 0, ss);
5639  st_word(buf + BS_55AA, 0xAA55); /* MBR signature */
5640  pte = buf + MBR_Table; /* Create partition table for single partition in the drive */
5641  pte[PTE_Boot] = 0; /* Boot indicator */
5642  pte[PTE_StHead] = 1; /* Start head */
5643  pte[PTE_StSec] = 1; /* Start sector */
5644  pte[PTE_StCyl] = 0; /* Start cylinder */
5645  pte[PTE_System] = sys; /* System type */
5646  n = (b_vol + sz_vol) / (63 * 255); /* (End CHS is incorrect) */
5647  pte[PTE_EdHead] = 254; /* End head */
5648  pte[PTE_EdSec] = (BYTE)(n >> 2 | 63); /* End sector */
5649  pte[PTE_EdCyl] = (BYTE)n; /* End cylinder */
5650  st_dword(pte + PTE_StLba, b_vol); /* Start offset in LBA */
5651  st_dword(pte + PTE_SizLba, sz_vol); /* Size in sectors */
5652  if (disk_write(pdrv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Write it to the MBR */
5653  }
5654  }
5655 
5656  if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) return FR_DISK_ERR;
5657 
5658  return FR_OK;
5659 }
5660 
5661 
5662 
5663 #if _MULTI_PARTITION
5664 /*-----------------------------------------------------------------------*/
5665 /* Create partition table on the physical drive */
5666 /*-----------------------------------------------------------------------*/
5667 
5668 FRESULT f_fdisk (
5669  BYTE pdrv, /* Physical drive number */
5670  const DWORD* szt, /* Pointer to the size table for each partitions */
5671  void* work /* Pointer to the working buffer */
5672 )
5673 {
5674  UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
5675  BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
5676  DSTATUS stat;
5677  DWORD sz_disk, sz_part, s_part;
5678 
5679 
5680  stat = disk_initialize(pdrv);
5681  if (stat & STA_NOINIT) return FR_NOT_READY;
5682  if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
5683  if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
5684 
5685  /* Determine the CHS without any care of the drive geometry */
5686  for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
5687  if (n == 256) n--;
5688  e_hd = n - 1;
5689  sz_cyl = 63 * n;
5690  tot_cyl = sz_disk / sz_cyl;
5691 
5692  /* Create partition table */
5693  mem_set(buf, 0, _MAX_SS);
5694  p = buf + MBR_Table; b_cyl = 0;
5695  for (i = 0; i < 4; i++, p += SZ_PTE) {
5696  p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;
5697  if (!p_cyl) continue;
5698  s_part = (DWORD)sz_cyl * b_cyl;
5699  sz_part = (DWORD)sz_cyl * p_cyl;
5700  if (i == 0) { /* Exclude first track of cylinder 0 */
5701  s_hd = 1;
5702  s_part += 63; sz_part -= 63;
5703  } else {
5704  s_hd = 0;
5705  }
5706  e_cyl = b_cyl + p_cyl - 1;
5707  if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
5708 
5709  /* Set partition table */
5710  p[1] = s_hd; /* Start head */
5711  p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */
5712  p[3] = (BYTE)b_cyl; /* Start cylinder */
5713  p[4] = 0x06; /* System type (temporary setting) */
5714  p[5] = e_hd; /* End head */
5715  p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */
5716  p[7] = (BYTE)e_cyl; /* End cylinder */
5717  st_dword(p + 8, s_part); /* Start sector in LBA */
5718  st_dword(p + 12, sz_part); /* Partition size */
5719 
5720  /* Next partition */
5721  b_cyl += p_cyl;
5722  }
5723  st_word(p, 0xAA55);
5724 
5725  /* Write it to the MBR */
5726  return (disk_write(pdrv, buf, 0, 1) != RES_OK || disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK;
5727 }
5728 
5729 #endif /* _MULTI_PARTITION */
5730 #endif /* _USE_MKFS && !_FS_READONLY */
5731 
5732 
5733 
5734 
5735 #if _USE_STRFUNC
5736 /*-----------------------------------------------------------------------*/
5737 /* Get a string from the file */
5738 /*-----------------------------------------------------------------------*/
5739 
5740 TCHAR* f_gets (
5741  TCHAR* buff, /* Pointer to the string buffer to read */
5742  int len, /* Size of string buffer (characters) */
5743  FIL* fp /* Pointer to the file object */
5744 )
5745 {
5746  int n = 0;
5747  TCHAR c, *p = buff;
5748  BYTE s[2];
5749  UINT rc;
5750 
5751 
5752  while (n < len - 1) { /* Read characters until buffer gets filled */
5753 #if _LFN_UNICODE
5754 #if _STRF_ENCODE == 3 /* Read a character in UTF-8 */
5755  f_read(fp, s, 1, &rc);
5756  if (rc != 1) break;
5757  c = s[0];
5758  if (c >= 0x80) {
5759  if (c < 0xC0) continue; /* Skip stray trailer */
5760  if (c < 0xE0) { /* Two-byte sequence */
5761  f_read(fp, s, 1, &rc);
5762  if (rc != 1) break;
5763  c = (c & 0x1F) << 6 | (s[0] & 0x3F);
5764  if (c < 0x80) c = '?';
5765  } else {
5766  if (c < 0xF0) { /* Three-byte sequence */
5767  f_read(fp, s, 2, &rc);
5768  if (rc != 2) break;
5769  c = c << 12 | (s[0] & 0x3F) << 6 | (s[1] & 0x3F);
5770  if (c < 0x800) c = '?';
5771  } else { /* Reject four-byte sequence */
5772  c = '?';
5773  }
5774  }
5775  }
5776 #elif _STRF_ENCODE == 2 /* Read a character in UTF-16BE */
5777  f_read(fp, s, 2, &rc);
5778  if (rc != 2) break;
5779  c = s[1] + (s[0] << 8);
5780 #elif _STRF_ENCODE == 1 /* Read a character in UTF-16LE */
5781  f_read(fp, s, 2, &rc);
5782  if (rc != 2) break;
5783  c = s[0] + (s[1] << 8);
5784 #else /* Read a character in ANSI/OEM */
5785  f_read(fp, s, 1, &rc);
5786  if (rc != 1) break;
5787  c = s[0];
5788  if (IsDBCS1(c)) {
5789  f_read(fp, s, 1, &rc);
5790  if (rc != 1) break;
5791  c = (c << 8) + s[0];
5792  }
5793  c = ff_convert(c, 1); /* OEM -> Unicode */
5794  if (!c) c = '?';
5795 #endif
5796 #else /* Read a character without conversion */
5797  f_read(fp, s, 1, &rc);
5798  if (rc != 1) break;
5799  c = s[0];
5800 #endif
5801  if (_USE_STRFUNC == 2 && c == '\r') continue; /* Strip '\r' */
5802  *p++ = c;
5803  n++;
5804  if (c == '\n') break; /* Break on EOL */
5805  }
5806  *p = 0;
5807  return n ? buff : 0; /* When no data read (eof or error), return with error. */
5808 }
5809 
5810 
5811 
5812 
5813 #if !_FS_READONLY
5814 #include <stdarg.h>
5815 /*-----------------------------------------------------------------------*/
5816 /* Put a character to the file */
5817 /*-----------------------------------------------------------------------*/
5818 
5819 typedef struct {
5820  FIL *fp; /* Ptr to the writing file */
5821  int idx, nchr; /* Write index of buf[] (-1:error), number of chars written */
5822  BYTE buf[64]; /* Write buffer */
5823 } putbuff;
5824 
5825 
5826 static
5827 void putc_bfd ( /* Buffered write with code conversion */
5828  putbuff* pb,
5829  TCHAR c
5830 )
5831 {
5832  UINT bw;
5833  int i;
5834 
5835 
5836  if (_USE_STRFUNC == 2 && c == '\n') { /* LF -> CRLF conversion */
5837  putc_bfd(pb, '\r');
5838  }
5839 
5840  i = pb->idx; /* Write index of pb->buf[] */
5841  if (i < 0) return;
5842 
5843 #if _LFN_UNICODE
5844 #if _STRF_ENCODE == 3 /* Write a character in UTF-8 */
5845  if (c < 0x80) { /* 7-bit */
5846  pb->buf[i++] = (BYTE)c;
5847  } else {
5848  if (c < 0x800) { /* 11-bit */
5849  pb->buf[i++] = (BYTE)(0xC0 | c >> 6);
5850  } else { /* 16-bit */
5851  pb->buf[i++] = (BYTE)(0xE0 | c >> 12);
5852  pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F));
5853  }
5854  pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F));
5855  }
5856 #elif _STRF_ENCODE == 2 /* Write a character in UTF-16BE */
5857  pb->buf[i++] = (BYTE)(c >> 8);
5858  pb->buf[i++] = (BYTE)c;
5859 #elif _STRF_ENCODE == 1 /* Write a character in UTF-16LE */
5860  pb->buf[i++] = (BYTE)c;
5861  pb->buf[i++] = (BYTE)(c >> 8);
5862 #else /* Write a character in ANSI/OEM */
5863  c = ff_convert(c, 0); /* Unicode -> OEM */
5864  if (!c) c = '?';
5865  if (c >= 0x100)
5866  pb->buf[i++] = (BYTE)(c >> 8);
5867  pb->buf[i++] = (BYTE)c;
5868 #endif
5869 #else /* Write a character without conversion */
5870  pb->buf[i++] = (BYTE)c;
5871 #endif
5872 
5873  if (i >= (int)(sizeof pb->buf) - 3) { /* Write buffered characters to the file */
5874  f_write(pb->fp, pb->buf, (UINT)i, &bw);
5875  i = (bw == (UINT)i) ? 0 : -1;
5876  }
5877  pb->idx = i;
5878  pb->nchr++;
5879 }
5880 
5881 
5882 static
5883 int putc_flush ( /* Flush left characters in the buffer */
5884  putbuff* pb
5885 )
5886 {
5887  UINT nw;
5888 
5889  if ( pb->idx >= 0 /* Flush buffered characters to the file */
5890  && f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK
5891  && (UINT)pb->idx == nw) return pb->nchr;
5892  return EOF;
5893 }
5894 
5895 
5896 static
5897 void putc_init ( /* Initialize write buffer */
5898  putbuff* pb,
5899  FIL* fp
5900 )
5901 {
5902  pb->fp = fp;
5903  pb->nchr = pb->idx = 0;
5904 }
5905 
5906 
5907 
5908 int f_putc (
5909  TCHAR c, /* A character to be output */
5910  FIL* fp /* Pointer to the file object */
5911 )
5912 {
5913  putbuff pb;
5914 
5915 
5916  putc_init(&pb, fp);
5917  putc_bfd(&pb, c); /* Put the character */
5918  return putc_flush(&pb);
5919 }
5920 
5921 
5922 
5923 
5924 /*-----------------------------------------------------------------------*/
5925 /* Put a string to the file */
5926 /*-----------------------------------------------------------------------*/
5927 
5928 int f_puts (
5929  const TCHAR* str, /* Pointer to the string to be output */
5930  FIL* fp /* Pointer to the file object */
5931 )
5932 {
5933  putbuff pb;
5934 
5935 
5936  putc_init(&pb, fp);
5937  while (*str) putc_bfd(&pb, *str++); /* Put the string */
5938  return putc_flush(&pb);
5939 }
5940 
5941 
5942 
5943 
5944 /*-----------------------------------------------------------------------*/
5945 /* Put a formatted string to the file */
5946 /*-----------------------------------------------------------------------*/
5947 
5948 int f_printf (
5949  FIL* fp, /* Pointer to the file object */
5950  const TCHAR* fmt, /* Pointer to the format string */
5951  ... /* Optional arguments... */
5952 )
5953 {
5954  va_list arp;
5955  putbuff pb;
5956  BYTE f, r;
5957  UINT i, j, w;
5958  DWORD v;
5959  TCHAR c, d, str[32], *p;
5960 
5961 
5962  putc_init(&pb, fp);
5963 
5964  va_start(arp, fmt);
5965 
5966  for (;;) {
5967  c = *fmt++;
5968  if (c == 0) break; /* End of string */
5969  if (c != '%') { /* Non escape character */
5970  putc_bfd(&pb, c);
5971  continue;
5972  }
5973  w = f = 0;
5974  c = *fmt++;
5975  if (c == '0') { /* Flag: '0' padding */
5976  f = 1; c = *fmt++;
5977  } else {
5978  if (c == '-') { /* Flag: left justified */
5979  f = 2; c = *fmt++;
5980  }
5981  }
5982  while (IsDigit(c)) { /* Precision */
5983  w = w * 10 + c - '0';
5984  c = *fmt++;
5985  }
5986  if (c == 'l' || c == 'L') { /* Prefix: Size is long int */
5987  f |= 4; c = *fmt++;
5988  }
5989  if (!c) break;
5990  d = c;
5991  if (IsLower(d)) d -= 0x20;
5992  switch (d) { /* Type is... */
5993  case 'S' : /* String */
5994  p = va_arg(arp, TCHAR*);
5995  for (j = 0; p[j]; j++) ;
5996  if (!(f & 2)) {
5997  while (j++ < w) putc_bfd(&pb, ' ');
5998  }
5999  while (*p) putc_bfd(&pb, *p++);
6000  while (j++ < w) putc_bfd(&pb, ' ');
6001  continue;
6002  case 'C' : /* Character */
6003  putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue;
6004  case 'B' : /* Binary */
6005  r = 2; break;
6006  case 'O' : /* Octal */
6007  r = 8; break;
6008  case 'D' : /* Signed decimal */
6009  case 'U' : /* Unsigned decimal */
6010  r = 10; break;
6011  case 'X' : /* Hexdecimal */
6012  r = 16; break;
6013  default: /* Unknown type (pass-through) */
6014  putc_bfd(&pb, c); continue;
6015  }
6016 
6017  /* Get an argument and put it in numeral */
6018  v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int));
6019  if (d == 'D' && (v & 0x80000000)) {
6020  v = 0 - v;
6021  f |= 8;
6022  }
6023  i = 0;
6024  do {
6025  d = (TCHAR)(v % r); v /= r;
6026  if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
6027  str[i++] = d + '0';
6028  } while (v && i < sizeof str / sizeof str[0]);
6029  if (f & 8) str[i++] = '-';
6030  j = i; d = (f & 1) ? '0' : ' ';
6031  while (!(f & 2) && j++ < w) putc_bfd(&pb, d);
6032  do putc_bfd(&pb, str[--i]); while (i);
6033  while (j++ < w) putc_bfd(&pb, d);
6034  }
6035 
6036  va_end(arp);
6037 
6038  return putc_flush(&pb);
6039 }
6040 
6041 #endif /* !_FS_READONLY */
6042 #endif /* _USE_STRFUNC */
#define _USE_STRFUNC
This option switches the string functions: f_gets(), f_putc(), f_puts(), and f_printf().
Definition: ffconf.h:93
#define _MIN_SS
These options configure the range of sector size to be supported (512, 1024, 2048, or 4096).
Definition: ffconf.h:285
#define _FS_LOCK
The option _FS_LOCK switches the file lock function controlling duplicate file open and illegal opera...
Definition: ffconf.h:380
#define _FS_EXFAT
This option switches the support of the exFAT file system (0: disable or 1: enable).
Definition: ffconf.h:340
#define _USE_LFN
_USE_LFN switches the support of long file name (LFN).
Definition: ffconf.h:200
#define _MULTI_PARTITION
This option switches support of multi-partition on a physical drive.
Definition: ffconf.h:274
#define _FS_READONLY
This option switches the read-only configuration (0: read/write or 1: read-only). ...
Definition: ffconf.h:68
#define _FS_RPATH
This option configures the support of relative path.
Definition: ffconf.h:239
#define _USE_LABEL
This option switches the volume label functions: f_getlabel() and f_setlabel() (0: disable or 1: enab...
Definition: ffconf.h:137
#define _VOLUMES
Number of volumes (logical drives) to be used.
Definition: ffconf.h:250