ReactOS 0.4.16-dev-338-g34e76ad
ff.c
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1/*----------------------------------------------------------------------------/
2/ FatFs - FAT file system module R0.11a (C)ChaN, 2015 /
3/-----------------------------------------------------------------------------/
4/ FatFs module is a free software that opened under license policy of
5/ following conditions.
6/
7/ Copyright (C) 2015, ChaN, all right reserved.
8/
9/ 1. Redistributions of source code must retain the above copyright notice,
10/ this condition and the following disclaimer.
11/
12/ This software is provided by the copyright holder and contributors "AS IS"
13/ and any warranties related to this software are DISCLAIMED.
14/ The copyright owner or contributors be NOT LIABLE for any damages caused
15/ by use of this software.
16/----------------------------------------------------------------------------*/
17
18
19#include "ff.h" /* Declarations of FatFs API */
20#include "diskio.h" /* Declarations of disk I/O functions */
21
22
23/*--------------------------------------------------------------------------
24
25 Module Private Definitions
26
27---------------------------------------------------------------------------*/
28
29#if _FATFS != 64180 /* Revision ID */
30#error Wrong include file (ff.h).
31#endif
32
33
34/* Reentrancy related */
35#if _FS_REENTRANT
36#if _USE_LFN == 1
37#error Static LFN work area cannot be used at thread-safe configuration
38#endif
39#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
40#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
41#else
42#define ENTER_FF(fs)
43#define LEAVE_FF(fs, res) return res
44#endif
45
46#define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
47
48
49/* Definitions of sector size */
50#if (_MAX_SS < _MIN_SS) || (_MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096) || (_MIN_SS != 512 && _MIN_SS != 1024 && _MIN_SS != 2048 && _MIN_SS != 4096)
51#error Wrong sector size configuration
52#endif
53#if _MAX_SS == _MIN_SS
54#define SS(fs) ((UINT)_MAX_SS) /* Fixed sector size */
55#else
56#define SS(fs) ((fs)->ssize) /* Variable sector size */
57#endif
58
59
60/* Timestamp feature */
61#if _FS_NORTC == 1
62#if _NORTC_YEAR < 1980 || _NORTC_YEAR > 2107 || _NORTC_MON < 1 || _NORTC_MON > 12 || _NORTC_MDAY < 1 || _NORTC_MDAY > 31
63#error Invalid _FS_NORTC settings
64#endif
65#define GET_FATTIME() ((DWORD)(_NORTC_YEAR - 1980) << 25 | (DWORD)_NORTC_MON << 21 | (DWORD)_NORTC_MDAY << 16)
66#else
67#define GET_FATTIME() get_fattime()
68#endif
69
70
71/* File access control feature */
72#if _FS_LOCK
73#if _FS_READONLY
74#error _FS_LOCK must be 0 at read-only configuration
75#endif
76typedef struct {
77 FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */
78 DWORD clu; /* Object ID 2, directory (0:root) */
79 WORD idx; /* Object ID 3, directory index */
80 WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
81} FILESEM;
82#endif
83
84
85
86/* DBCS code ranges and SBCS upper conversion tables */
87
88#if _CODE_PAGE == 932 /* Japanese Shift-JIS */
89#define _DF1S 0x81 /* DBC 1st byte range 1 start */
90#define _DF1E 0x9F /* DBC 1st byte range 1 end */
91#define _DF2S 0xE0 /* DBC 1st byte range 2 start */
92#define _DF2E 0xFC /* DBC 1st byte range 2 end */
93#define _DS1S 0x40 /* DBC 2nd byte range 1 start */
94#define _DS1E 0x7E /* DBC 2nd byte range 1 end */
95#define _DS2S 0x80 /* DBC 2nd byte range 2 start */
96#define _DS2E 0xFC /* DBC 2nd byte range 2 end */
97
98#elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
99#define _DF1S 0x81
100#define _DF1E 0xFE
101#define _DS1S 0x40
102#define _DS1E 0x7E
103#define _DS2S 0x80
104#define _DS2E 0xFE
105
106#elif _CODE_PAGE == 949 /* Korean */
107#define _DF1S 0x81
108#define _DF1E 0xFE
109#define _DS1S 0x41
110#define _DS1E 0x5A
111#define _DS2S 0x61
112#define _DS2E 0x7A
113#define _DS3S 0x81
114#define _DS3E 0xFE
115
116#elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
117#define _DF1S 0x81
118#define _DF1E 0xFE
119#define _DS1S 0x40
120#define _DS1E 0x7E
121#define _DS2S 0xA1
122#define _DS2E 0xFE
123
124#elif _CODE_PAGE == 437 /* U.S. */
125#define _DF1S 0
126#define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
127 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
128 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
129 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
130 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
131 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
132 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
133 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
134
135#elif _CODE_PAGE == 720 /* Arabic */
136#define _DF1S 0
137#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
138 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
139 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
140 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
141 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
142 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
143 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
144 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
145
146#elif _CODE_PAGE == 737 /* Greek */
147#define _DF1S 0
148#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
149 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
150 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \
151 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
152 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
153 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
154 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
155 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
156
157#elif _CODE_PAGE == 771 /* KBL */
158#define _DF1S 0
159#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
160 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
161 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
162 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
163 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
164 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \
165 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
166 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
167
168#elif _CODE_PAGE == 775 /* Baltic */
169#define _DF1S 0
170#define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \
171 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
172 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
173 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
174 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
175 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
176 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \
177 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
178
179#elif _CODE_PAGE == 850 /* Latin 1 */
180#define _DF1S 0
181#define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
182 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
183 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
184 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
185 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
186 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
187 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
188 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
189
190#elif _CODE_PAGE == 852 /* Latin 2 */
191#define _DF1S 0
192#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \
193 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \
194 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \
195 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
196 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
197 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
198 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \
199 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
200
201#elif _CODE_PAGE == 855 /* Cyrillic */
202#define _DF1S 0
203#define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \
204 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
205 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \
206 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
207 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
208 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
209 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \
210 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
211
212#elif _CODE_PAGE == 857 /* Turkish */
213#define _DF1S 0
214#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \
215 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
216 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
217 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
218 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
219 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
220 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
221 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
222
223#elif _CODE_PAGE == 860 /* Portuguese */
224#define _DF1S 0
225#define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
226 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
227 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
228 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
229 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
230 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
231 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
232 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
233
234#elif _CODE_PAGE == 861 /* Icelandic */
235#define _DF1S 0
236#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
237 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
238 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
239 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
240 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
241 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
242 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
243 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
244
245#elif _CODE_PAGE == 862 /* Hebrew */
246#define _DF1S 0
247#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
248 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
249 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
250 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
251 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
252 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
253 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
254 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
255
256#elif _CODE_PAGE == 863 /* Canadian-French */
257#define _DF1S 0
258#define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
259 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
260 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
261 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
262 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
263 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
264 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
265 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
266
267#elif _CODE_PAGE == 864 /* Arabic */
268#define _DF1S 0
269#define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
270 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
271 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
272 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
273 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
274 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
275 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
276 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
277
278#elif _CODE_PAGE == 865 /* Nordic */
279#define _DF1S 0
280#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
281 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
282 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
283 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
284 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
285 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
286 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
287 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
288
289#elif _CODE_PAGE == 866 /* Russian */
290#define _DF1S 0
291#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
292 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
293 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
294 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
295 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
296 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
297 0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
298 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
299
300#elif _CODE_PAGE == 869 /* Greek 2 */
301#define _DF1S 0
302#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
303 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \
304 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
305 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
306 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
307 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
308 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
309 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
310
311#elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
312#if _USE_LFN
313#error Cannot use LFN feature without valid code page.
314#endif
315#define _DF1S 0
316
317#else
318#error Unknown code page
319
320#endif
321
322
323/* Character code support macros */
324#define IsUpper(c) (((c)>='A')&&((c)<='Z'))
325#define IsLower(c) (((c)>='a')&&((c)<='z'))
326#define IsDigit(c) (((c)>='0')&&((c)<='9'))
327
328#if _DF1S /* Code page is DBCS */
329
330#ifdef _DF2S /* Two 1st byte areas */
331#define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
332#else /* One 1st byte area */
333#define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
334#endif
335
336#ifdef _DS3S /* Three 2nd byte areas */
337#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
338#else /* Two 2nd byte areas */
339#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
340#endif
341
342#else /* Code page is SBCS */
343
344#define IsDBCS1(c) 0
345#define IsDBCS2(c) 0
346
347#endif /* _DF1S */
348
349
350/* Name status flags */
351#define NSFLAG 11 /* Index of name status byte in fn[] */
352#define NS_LOSS 0x01 /* Out of 8.3 format */
353#define NS_LFN 0x02 /* Force to create LFN entry */
354#define NS_LAST 0x04 /* Last segment */
355#define NS_BODY 0x08 /* Lower case flag (body) */
356#define NS_EXT 0x10 /* Lower case flag (ext) */
357#define NS_DOT 0x20 /* Dot entry */
358
359
360/* FAT sub-type boundaries (Differ from specs but correct for real DOS/Windows) */
361#define MIN_FAT16 4086U /* Minimum number of clusters of FAT16 */
362#define MIN_FAT32 65526U /* Minimum number of clusters of FAT32 */
363
364
365/* FatFs refers the members in the FAT structures as byte array instead of
366/ structure members because the structure is not binary compatible between
367/ different platforms */
368
369#define BS_jmpBoot 0 /* x86 jump instruction (3) */
370#define BS_OEMName 3 /* OEM name (8) */
371#define BPB_BytsPerSec 11 /* Sector size [byte] (2) */
372#define BPB_SecPerClus 13 /* Cluster size [sector] (1) */
373#define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */
374#define BPB_NumFATs 16 /* Number of FAT copies (1) */
375#define BPB_RootEntCnt 17 /* Number of root directory entries for FAT12/16 (2) */
376#define BPB_TotSec16 19 /* Volume size [sector] (2) */
377#define BPB_Media 21 /* Media descriptor (1) */
378#define BPB_FATSz16 22 /* FAT size [sector] (2) */
379#define BPB_SecPerTrk 24 /* Track size [sector] (2) */
380#define BPB_NumHeads 26 /* Number of heads (2) */
381#define BPB_HiddSec 28 /* Number of special hidden sectors (4) */
382#define BPB_TotSec32 32 /* Volume size [sector] (4) */
383#define BS_DrvNum 36 /* Physical drive number (1) */
384#define BS_NTres 37 /* Error flag (1) */
385#define BS_BootSig 38 /* Extended boot signature (1) */
386#define BS_VolID 39 /* Volume serial number (4) */
387#define BS_VolLab 43 /* Volume label (8) */
388#define BS_FilSysType 54 /* File system type (1) */
389#define BPB_FATSz32 36 /* FAT size [sector] (4) */
390#define BPB_ExtFlags 40 /* Extended flags (2) */
391#define BPB_FSVer 42 /* File system version (2) */
392#define BPB_RootClus 44 /* Root directory first cluster (4) */
393#define BPB_FSInfo 48 /* Offset of FSINFO sector (2) */
394#define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */
395#define BS_DrvNum32 64 /* Physical drive number (1) */
396#define BS_NTres32 65 /* Error flag (1) */
397#define BS_BootSig32 66 /* Extended boot signature (1) */
398#define BS_VolID32 67 /* Volume serial number (4) */
399#define BS_VolLab32 71 /* Volume label (8) */
400#define BS_FilSysType32 82 /* File system type (1) */
401#define FSI_LeadSig 0 /* FSI: Leading signature (4) */
402#define FSI_StrucSig 484 /* FSI: Structure signature (4) */
403#define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */
404#define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */
405#define MBR_Table 446 /* MBR: Partition table offset (2) */
406#define SZ_PTE 16 /* MBR: Size of a partition table entry */
407#define BS_55AA 510 /* Signature word (2) */
408
409#define DIR_Name 0 /* Short file name (11) */
410#define DIR_Attr 11 /* Attribute (1) */
411#define DIR_NTres 12 /* Lower case flag (1) */
412#define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */
413#define DIR_CrtTime 14 /* Created time (2) */
414#define DIR_CrtDate 16 /* Created date (2) */
415#define DIR_LstAccDate 18 /* Last accessed date (2) */
416#define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */
417#define DIR_WrtTime 22 /* Modified time (2) */
418#define DIR_WrtDate 24 /* Modified date (2) */
419#define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */
420#define DIR_FileSize 28 /* File size (4) */
421#define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */
422#define LDIR_Attr 11 /* LFN attribute (1) */
423#define LDIR_Type 12 /* LFN type (1) */
424#define LDIR_Chksum 13 /* Checksum of corresponding SFN entry */
425#define LDIR_FstClusLO 26 /* Must be zero (0) */
426#define SZ_DIRE 32 /* Size of a directory entry */
427#define LLEF 0x40 /* Last long entry flag in LDIR_Ord */
428#define DDEM 0xE5 /* Deleted directory entry mark at DIR_Name[0] */
429#define RDDEM 0x05 /* Replacement of the character collides with DDEM */
430
431
432
433
434/*--------------------------------------------------------------------------
435
436 Module Private Work Area
437
438---------------------------------------------------------------------------*/
439
440/* Remark: Uninitialized variables with static duration are guaranteed
441/ zero/null at start-up. If not, either the linker or start-up routine
442/ being used is not compliance with ANSI-C standard.
443*/
444
445#if _VOLUMES < 1 || _VOLUMES > 9
446#error Wrong _VOLUMES setting
447#endif
448static FATFS *FatFs[_VOLUMES]; /* Pointer to the file system objects (logical drives) */
449static WORD Fsid; /* File system mount ID */
450
451#if _FS_RPATH && _VOLUMES >= 2
452static BYTE CurrVol; /* Current drive */
453#endif
454
455#if _FS_LOCK
456static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */
457#endif
458
459#if _USE_LFN == 0 /* Non LFN feature */
460#define DEFINE_NAMEBUF BYTE sfn[12]
461#define INIT_BUF(dobj) (dobj).fn = sfn
462#define FREE_BUF()
463#else
464#if _MAX_LFN < 12 || _MAX_LFN > 255
465#error Wrong _MAX_LFN setting
466#endif
467#if _USE_LFN == 1 /* LFN feature with static working buffer */
468static WCHAR LfnBuf[_MAX_LFN + 1];
469#define DEFINE_NAMEBUF BYTE sfn[12]
470#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
471#define FREE_BUF()
472#elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */
473#define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN + 1]
474#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; }
475#define FREE_BUF()
476#elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */
477#define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR *lfn
478#define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); (dobj).lfn = lfn; (dobj).fn = sfn; }
479#define FREE_BUF() ff_memfree(lfn)
480#else
481#error Wrong _USE_LFN setting
482#endif
483#endif
484
485#ifdef _EXCVT
486static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for SBCS extended characters */
487#endif
488
489
490
491
492
493
494/*--------------------------------------------------------------------------
495
496 Module Private Functions
497
498---------------------------------------------------------------------------*/
499
500
501/*-----------------------------------------------------------------------*/
502/* String functions */
503/*-----------------------------------------------------------------------*/
504
505/* Copy memory to memory */
506static
507void mem_cpy (void* dst, const void* src, UINT cnt) {
508 BYTE *d = (BYTE*)dst;
509 const BYTE *s = (const BYTE*)src;
510
511#if _WORD_ACCESS == 1
512 while (cnt >= sizeof (int)) {
513 *(int*)d = *(int*)s;
514 d += sizeof (int); s += sizeof (int);
515 cnt -= sizeof (int);
516 }
517#endif
518 while (cnt--)
519 *d++ = *s++;
520}
521
522/* Fill memory */
523static
524void mem_set (void* dst, int val, UINT cnt) {
525 BYTE *d = (BYTE*)dst;
526
527 while (cnt--)
528 *d++ = (BYTE)val;
529}
530
531/* Compare memory to memory */
532static
533int mem_cmp (const void* dst, const void* src, UINT cnt) {
534 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
535 int r = 0;
536
537 while (cnt-- && (r = *d++ - *s++) == 0) ;
538 return r;
539}
540
541/* Check if chr is contained in the string */
542static
543int chk_chr (const char* str, int chr) {
544 while (*str && *str != chr) str++;
545 return *str;
546}
547
548
549
550
551/*-----------------------------------------------------------------------*/
552/* Request/Release grant to access the volume */
553/*-----------------------------------------------------------------------*/
554#if _FS_REENTRANT
555static
556int lock_fs (
557 FATFS* fs /* File system object */
558)
559{
560 return ff_req_grant(fs->sobj);
561}
562
563
564static
565void unlock_fs (
566 FATFS* fs, /* File system object */
567 FRESULT res /* Result code to be returned */
568)
569{
570 if (fs &&
571 res != FR_NOT_ENABLED &&
572 res != FR_INVALID_DRIVE &&
573 res != FR_INVALID_OBJECT &&
574 res != FR_TIMEOUT) {
575 ff_rel_grant(fs->sobj);
576 }
577}
578#endif
579
580
581
582
583/*-----------------------------------------------------------------------*/
584/* File lock control functions */
585/*-----------------------------------------------------------------------*/
586#if _FS_LOCK
587
588static
589FRESULT chk_lock ( /* Check if the file can be accessed */
590 DIR* dp, /* Directory object pointing the file to be checked */
591 int acc /* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */
592)
593{
594 UINT i, be;
595
596 /* Search file semaphore table */
597 for (i = be = 0; i < _FS_LOCK; i++) {
598 if (Files[i].fs) { /* Existing entry */
599 if (Files[i].fs == dp->fs && /* Check if the object matched with an open object */
600 Files[i].clu == dp->sclust &&
601 Files[i].idx == dp->index) break;
602 } else { /* Blank entry */
603 be = 1;
604 }
605 }
606 if (i == _FS_LOCK) /* The object is not opened */
607 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */
608
609 /* The object has been opened. Reject any open against writing file and all write mode open */
610 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
611}
612
613
614static
615int enq_lock (void) /* Check if an entry is available for a new object */
616{
617 UINT i;
618
619 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
620 return (i == _FS_LOCK) ? 0 : 1;
621}
622
623
624static
625UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */
626 DIR* dp, /* Directory object pointing the file to register or increment */
627 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
628)
629{
630 UINT i;
631
632
633 for (i = 0; i < _FS_LOCK; i++) { /* Find the object */
634 if (Files[i].fs == dp->fs &&
635 Files[i].clu == dp->sclust &&
636 Files[i].idx == dp->index) break;
637 }
638
639 if (i == _FS_LOCK) { /* Not opened. Register it as new. */
640 for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
641 if (i == _FS_LOCK) return 0; /* No free entry to register (int err) */
642 Files[i].fs = dp->fs;
643 Files[i].clu = dp->sclust;
644 Files[i].idx = dp->index;
645 Files[i].ctr = 0;
646 }
647
648 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */
649
650 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
651
652 return i + 1;
653}
654
655
656static
657FRESULT dec_lock ( /* Decrement object open counter */
658 UINT i /* Semaphore index (1..) */
659)
660{
661 WORD n;
662 FRESULT res;
663
664
665 if (--i < _FS_LOCK) { /* Shift index number origin from 0 */
666 n = Files[i].ctr;
667 if (n == 0x100) n = 0; /* If write mode open, delete the entry */
668 if (n) n--; /* Decrement read mode open count */
669 Files[i].ctr = n;
670 if (!n) Files[i].fs = 0; /* Delete the entry if open count gets zero */
671 res = FR_OK;
672 } else {
673 res = FR_INT_ERR; /* Invalid index nunber */
674 }
675 return res;
676}
677
678
679static
680void clear_lock ( /* Clear lock entries of the volume */
681 FATFS *fs
682)
683{
684 UINT i;
685
686 for (i = 0; i < _FS_LOCK; i++) {
687 if (Files[i].fs == fs) Files[i].fs = 0;
688 }
689}
690#endif
691
692
693
694
695/*-----------------------------------------------------------------------*/
696/* Move/Flush disk access window in the file system object */
697/*-----------------------------------------------------------------------*/
698#if !_FS_READONLY
699static
700FRESULT sync_window ( /* FR_OK:succeeded, !=0:error */
701 FATFS* fs /* File system object */
702)
703{
704 DWORD wsect;
705 UINT nf;
706 FRESULT res = FR_OK;
707
708
709 if (fs->wflag) { /* Write back the sector if it is dirty */
710 wsect = fs->winsect; /* Current sector number */
711 if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) {
712 res = FR_DISK_ERR;
713 } else {
714 fs->wflag = 0;
715 if (wsect - fs->fatbase < fs->fsize) { /* Is it in the FAT area? */
716 for (nf = fs->n_fats; nf >= 2; nf--) { /* Reflect the change to all FAT copies */
717 wsect += fs->fsize;
718 disk_write(fs->drv, fs->win, wsect, 1);
719 }
720 }
721 }
722 }
723 return res;
724}
725#endif
726
727
728static
729FRESULT move_window ( /* FR_OK(0):succeeded, !=0:error */
730 FATFS* fs, /* File system object */
731 DWORD sector /* Sector number to make appearance in the fs->win[] */
732)
733{
734 FRESULT res = FR_OK;
735
736
737 if (sector != fs->winsect) { /* Window offset changed? */
738#if !_FS_READONLY
739 res = sync_window(fs); /* Write-back changes */
740#endif
741 if (res == FR_OK) { /* Fill sector window with new data */
742 if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) {
743 sector = 0xFFFFFFFF; /* Invalidate window if data is not reliable */
744 res = FR_DISK_ERR;
745 }
746 fs->winsect = sector;
747 }
748 }
749 return res;
750}
751
752
753
754
755/*-----------------------------------------------------------------------*/
756/* Synchronize file system and strage device */
757/*-----------------------------------------------------------------------*/
758#if !_FS_READONLY
759static
760FRESULT sync_fs ( /* FR_OK:succeeded, !=0:error */
761 FATFS* fs /* File system object */
762)
763{
764 FRESULT res;
765
766
767 res = sync_window(fs);
768 if (res == FR_OK) {
769 /* Update FSInfo sector if needed */
770 if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) {
771 /* Create FSInfo structure */
772 mem_set(fs->win, 0, SS(fs));
773 ST_WORD(fs->win + BS_55AA, 0xAA55);
774 ST_DWORD(fs->win + FSI_LeadSig, 0x41615252);
775 ST_DWORD(fs->win + FSI_StrucSig, 0x61417272);
776 ST_DWORD(fs->win + FSI_Free_Count, fs->free_clust);
777 ST_DWORD(fs->win + FSI_Nxt_Free, fs->last_clust);
778 /* Write it into the FSInfo sector */
779 fs->winsect = fs->volbase + 1;
780 disk_write(fs->drv, fs->win, fs->winsect, 1);
781 fs->fsi_flag = 0;
782 }
783 /* Make sure that no pending write process in the physical drive */
784 if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
785 res = FR_DISK_ERR;
786 }
787
788 return res;
789}
790#endif
791
792
793
794
795/*-----------------------------------------------------------------------*/
796/* Get sector# from cluster# */
797/*-----------------------------------------------------------------------*/
798/* Hidden API for hacks and disk tools */
799
800DWORD clust2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */
801 FATFS* fs, /* File system object */
802 DWORD clst /* Cluster# to be converted */
803)
804{
805 clst -= 2;
806 if (clst >= fs->n_fatent - 2) return 0; /* Invalid cluster# */
807 return clst * fs->csize + fs->database;
808}
809
810
811
812
813/*-----------------------------------------------------------------------*/
814/* FAT access - Read value of a FAT entry */
815/*-----------------------------------------------------------------------*/
816/* Hidden API for hacks and disk tools */
817
818DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x0FFFFFFF:Cluster status */
819 FATFS* fs, /* File system object */
820 DWORD clst /* FAT index number (cluster number) to get the value */
821)
822{
823 UINT wc, bc;
824 BYTE *p;
825 DWORD val;
826
827
828 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
829 val = 1; /* Internal error */
830
831 } else {
832 val = 0xFFFFFFFF; /* Default value falls on disk error */
833
834 switch (fs->fs_type) {
835 case FS_FAT12 :
836 bc = (UINT)clst; bc += bc / 2;
837 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
838 wc = fs->win[bc++ % SS(fs)];
839 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
840 wc |= fs->win[bc % SS(fs)] << 8;
841 val = clst & 1 ? wc >> 4 : (wc & 0xFFF);
842 break;
843
844 case FS_FAT16 :
845 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
846 p = &fs->win[clst * 2 % SS(fs)];
847 val = LD_WORD(p);
848 break;
849
850 case FS_FAT32 :
851 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
852 p = &fs->win[clst * 4 % SS(fs)];
853 val = LD_DWORD(p) & 0x0FFFFFFF;
854 break;
855
856 default:
857 val = 1; /* Internal error */
858 }
859 }
860
861 return val;
862}
863
864
865
866
867/*-----------------------------------------------------------------------*/
868/* FAT access - Change value of a FAT entry */
869/*-----------------------------------------------------------------------*/
870/* Hidden API for hacks and disk tools */
871
872#if !_FS_READONLY
873FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */
874 FATFS* fs, /* File system object */
875 DWORD clst, /* FAT index number (cluster number) to be changed */
876 DWORD val /* New value to be set to the entry */
877)
878{
879 UINT bc;
880 BYTE *p;
881 FRESULT res;
882
883
884 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
885 res = FR_INT_ERR;
886
887 } else {
888 switch (fs->fs_type) {
889 case FS_FAT12 :
890 bc = (UINT)clst; bc += bc / 2;
891 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
892 if (res != FR_OK) break;
893 p = &fs->win[bc++ % SS(fs)];
894 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
895 fs->wflag = 1;
896 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
897 if (res != FR_OK) break;
898 p = &fs->win[bc % SS(fs)];
899 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
900 fs->wflag = 1;
901 break;
902
903 case FS_FAT16 :
904 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
905 if (res != FR_OK) break;
906 p = &fs->win[clst * 2 % SS(fs)];
907 ST_WORD(p, (WORD)val);
908 fs->wflag = 1;
909 break;
910
911 case FS_FAT32 :
912 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
913 if (res != FR_OK) break;
914 p = &fs->win[clst * 4 % SS(fs)];
915 val |= LD_DWORD(p) & 0xF0000000;
916 ST_DWORD(p, val);
917 fs->wflag = 1;
918 break;
919
920 default :
921 res = FR_INT_ERR;
922 }
923 }
924
925 return res;
926}
927#endif /* !_FS_READONLY */
928
929
930
931
932/*-----------------------------------------------------------------------*/
933/* FAT handling - Remove a cluster chain */
934/*-----------------------------------------------------------------------*/
935#if !_FS_READONLY
936static
937FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */
938 FATFS* fs, /* File system object */
939 DWORD clst /* Cluster# to remove a chain from */
940)
941{
942 FRESULT res;
943 DWORD nxt;
944#if _USE_TRIM
945 DWORD scl = clst, ecl = clst, rt[2];
946#endif
947
948 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
949 res = FR_INT_ERR;
950
951 } else {
952 res = FR_OK;
953 while (clst < fs->n_fatent) { /* Not a last link? */
954 nxt = get_fat(fs, clst); /* Get cluster status */
955 if (nxt == 0) break; /* Empty cluster? */
956 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
957 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
958 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
959 if (res != FR_OK) break;
960 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSINFO */
961 fs->free_clust++;
962 fs->fsi_flag |= 1;
963 }
964#if _USE_TRIM
965 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
966 ecl = nxt;
967 } else { /* End of contiguous clusters */
968 rt[0] = clust2sect(fs, scl); /* Start sector */
969 rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */
970 disk_ioctl(fs->drv, CTRL_TRIM, rt); /* Erase the block */
971 scl = ecl = nxt;
972 }
973#endif
974 clst = nxt; /* Next cluster */
975 }
976 }
977
978 return res;
979}
980#endif
981
982
983
984
985/*-----------------------------------------------------------------------*/
986/* FAT handling - Stretch or Create a cluster chain */
987/*-----------------------------------------------------------------------*/
988#if !_FS_READONLY
989static
990DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
991 FATFS* fs, /* File system object */
992 DWORD clst /* Cluster# to stretch, 0:Create a new chain */
993)
994{
995 DWORD cs, ncl, scl;
996 FRESULT res;
997
998
999 if (clst == 0) { /* Create a new chain */
1000 scl = fs->last_clust; /* Get suggested start point */
1001 if (!scl || scl >= fs->n_fatent) scl = 1;
1002 }
1003 else { /* Stretch the current chain */
1004 cs = get_fat(fs, clst); /* Check the cluster status */
1005 if (cs < 2) return 1; /* Invalid value */
1006 if (cs == 0xFFFFFFFF) return cs; /* A disk error occurred */
1007 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
1008 scl = clst;
1009 }
1010
1011 ncl = scl; /* Start cluster */
1012 for (;;) {
1013 ncl++; /* Next cluster */
1014 if (ncl >= fs->n_fatent) { /* Check wrap around */
1015 ncl = 2;
1016 if (ncl > scl) return 0; /* No free cluster */
1017 }
1018 cs = get_fat(fs, ncl); /* Get the cluster status */
1019 if (cs == 0) break; /* Found a free cluster */
1020 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */
1021 return cs;
1022 if (ncl == scl) return 0; /* No free cluster */
1023 }
1024
1025 res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */
1026 if (res == FR_OK && clst != 0) {
1027 res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */
1028 }
1029 if (res == FR_OK) {
1030 fs->last_clust = ncl; /* Update FSINFO */
1031 if (fs->free_clust != 0xFFFFFFFF) {
1032 fs->free_clust--;
1033 fs->fsi_flag |= 1;
1034 }
1035 } else {
1036 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
1037 }
1038
1039 return ncl; /* Return new cluster number or error code */
1040}
1041#endif /* !_FS_READONLY */
1042
1043
1044
1045
1046/*-----------------------------------------------------------------------*/
1047/* FAT handling - Convert offset into cluster with link map table */
1048/*-----------------------------------------------------------------------*/
1049
1050#if _USE_FASTSEEK
1051static
1052DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
1053 FIL* fp, /* Pointer to the file object */
1054 DWORD ofs /* File offset to be converted to cluster# */
1055)
1056{
1057 DWORD cl, ncl, *tbl;
1058
1059
1060 tbl = fp->cltbl + 1; /* Top of CLMT */
1061 cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */
1062 for (;;) {
1063 ncl = *tbl++; /* Number of cluters in the fragment */
1064 if (!ncl) return 0; /* End of table? (error) */
1065 if (cl < ncl) break; /* In this fragment? */
1066 cl -= ncl; tbl++; /* Next fragment */
1067 }
1068 return cl + *tbl; /* Return the cluster number */
1069}
1070#endif /* _USE_FASTSEEK */
1071
1072
1073
1074
1075/*-----------------------------------------------------------------------*/
1076/* Directory handling - Set directory index */
1077/*-----------------------------------------------------------------------*/
1078
1079static
1080FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */
1081 DIR* dp, /* Pointer to directory object */
1082 UINT idx /* Index of directory table */
1083)
1084{
1085 DWORD clst, sect;
1086 UINT ic;
1087
1088
1089 dp->index = (WORD)idx; /* Current index */
1090 clst = dp->sclust; /* Table start cluster (0:root) */
1091 if (clst == 1 || clst >= dp->fs->n_fatent) /* Check start cluster range */
1092 return FR_INT_ERR;
1093 if (!clst && dp->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
1094 clst = dp->fs->dirbase;
1095
1096 if (clst == 0) { /* Static table (root-directory in FAT12/16) */
1097 if (idx >= dp->fs->n_rootdir) /* Is index out of range? */
1098 return FR_INT_ERR;
1099 sect = dp->fs->dirbase;
1100 }
1101 else { /* Dynamic table (root-directory in FAT32 or sub-directory) */
1102 ic = SS(dp->fs) / SZ_DIRE * dp->fs->csize; /* Entries per cluster */
1103 while (idx >= ic) { /* Follow cluster chain */
1104 clst = get_fat(dp->fs, clst); /* Get next cluster */
1105 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1106 if (clst < 2 || clst >= dp->fs->n_fatent) /* Reached to end of table or internal error */
1107 return FR_INT_ERR;
1108 idx -= ic;
1109 }
1110 sect = clust2sect(dp->fs, clst);
1111 }
1112 dp->clust = clst; /* Current cluster# */
1113 if (!sect) return FR_INT_ERR;
1114 dp->sect = sect + idx / (SS(dp->fs) / SZ_DIRE); /* Sector# of the directory entry */
1115 dp->dir = dp->fs->win + (idx % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Ptr to the entry in the sector */
1116
1117 return FR_OK;
1118}
1119
1120
1121
1122
1123/*-----------------------------------------------------------------------*/
1124/* Directory handling - Move directory table index next */
1125/*-----------------------------------------------------------------------*/
1126
1127static
1128FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
1129 DIR* dp, /* Pointer to the directory object */
1130 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
1131)
1132{
1133 DWORD clst;
1134 UINT i;
1135#if !_FS_READONLY
1136 UINT c;
1137#endif
1138
1139
1140 i = dp->index + 1;
1141 if (!(i & 0xFFFF) || !dp->sect) /* Report EOT when index has reached 65535 */
1142 return FR_NO_FILE;
1143
1144 if (!(i % (SS(dp->fs) / SZ_DIRE))) { /* Sector changed? */
1145 dp->sect++; /* Next sector */
1146
1147 if (!dp->clust) { /* Static table */
1148 if (i >= dp->fs->n_rootdir) /* Report EOT if it reached end of static table */
1149 return FR_NO_FILE;
1150 }
1151 else { /* Dynamic table */
1152 if (((i / (SS(dp->fs) / SZ_DIRE)) & (dp->fs->csize - 1)) == 0) { /* Cluster changed? */
1153 clst = get_fat(dp->fs, dp->clust); /* Get next cluster */
1154 if (clst <= 1) return FR_INT_ERR;
1155 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1156 if (clst >= dp->fs->n_fatent) { /* If it reached end of dynamic table, */
1157#if !_FS_READONLY
1158 if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT */
1159 clst = create_chain(dp->fs, dp->clust); /* Stretch cluster chain */
1160 if (clst == 0) return FR_DENIED; /* No free cluster */
1161 if (clst == 1) return FR_INT_ERR;
1162 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1163 /* Clean-up stretched table */
1164 if (sync_window(dp->fs)) return FR_DISK_ERR;/* Flush disk access window */
1165 mem_set(dp->fs->win, 0, SS(dp->fs)); /* Clear window buffer */
1166 dp->fs->winsect = clust2sect(dp->fs, clst); /* Cluster start sector */
1167 for (c = 0; c < dp->fs->csize; c++) { /* Fill the new cluster with 0 */
1168 dp->fs->wflag = 1;
1169 if (sync_window(dp->fs)) return FR_DISK_ERR;
1170 dp->fs->winsect++;
1171 }
1172 dp->fs->winsect -= c; /* Rewind window offset */
1173#else
1174 if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT (this is to suppress warning) */
1175 return FR_NO_FILE; /* Report EOT */
1176#endif
1177 }
1178 dp->clust = clst; /* Initialize data for new cluster */
1179 dp->sect = clust2sect(dp->fs, clst);
1180 }
1181 }
1182 }
1183
1184 dp->index = (WORD)i; /* Current index */
1185 dp->dir = dp->fs->win + (i % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Current entry in the window */
1186
1187 return FR_OK;
1188}
1189
1190
1191
1192
1193/*-----------------------------------------------------------------------*/
1194/* Directory handling - Reserve directory entry */
1195/*-----------------------------------------------------------------------*/
1196
1197#if !_FS_READONLY
1198static
1199FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */
1200 DIR* dp, /* Pointer to the directory object */
1201 UINT nent /* Number of contiguous entries to allocate (1-21) */
1202)
1203{
1204 FRESULT res;
1205 UINT n;
1206
1207
1208 res = dir_sdi(dp, 0);
1209 if (res == FR_OK) {
1210 n = 0;
1211 do {
1212 res = move_window(dp->fs, dp->sect);
1213 if (res != FR_OK) break;
1214 if (dp->dir[0] == DDEM || dp->dir[0] == 0) { /* Is it a free entry? */
1215 if (++n == nent) break; /* A block of contiguous free entries is found */
1216 } else {
1217 n = 0; /* Not a blank entry. Restart to search */
1218 }
1219 res = dir_next(dp, 1); /* Next entry with table stretch enabled */
1220 } while (res == FR_OK);
1221 }
1222 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
1223 return res;
1224}
1225#endif
1226
1227
1228
1229
1230/*-----------------------------------------------------------------------*/
1231/* Directory handling - Load/Store start cluster number */
1232/*-----------------------------------------------------------------------*/
1233
1234static
1235DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */
1236 FATFS* fs, /* Pointer to the fs object */
1237 const BYTE* dir /* Pointer to the SFN entry */
1238)
1239{
1240 DWORD cl;
1241
1242 cl = LD_WORD(dir + DIR_FstClusLO);
1243 if (fs->fs_type == FS_FAT32)
1244 cl |= (DWORD)LD_WORD(dir + DIR_FstClusHI) << 16;
1245
1246 return cl;
1247}
1248
1249
1250#if !_FS_READONLY
1251static
1252void st_clust (
1253 BYTE* dir, /* Pointer to the SFN entry */
1254 DWORD cl /* Value to be set */
1255)
1256{
1257 ST_WORD(dir + DIR_FstClusLO, cl);
1258 ST_WORD(dir + DIR_FstClusHI, cl >> 16);
1259}
1260#endif
1261
1262
1263
1264
1265/*-----------------------------------------------------------------------*/
1266/* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
1267/*-----------------------------------------------------------------------*/
1268#if _USE_LFN
1269static
1270const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN characters in the directory entry */
1271
1272
1273static
1274int cmp_lfn ( /* 1:matched, 0:not matched */
1275 WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */
1276 BYTE* dir /* Pointer to the directory entry containing the part of LFN */
1277)
1278{
1279 UINT i, s;
1280 WCHAR wc, uc;
1281
1282
1283 if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
1284
1285 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1286
1287 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1288 uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */
1289 if (wc) {
1290 if (i >= _MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) /* Compare it */
1291 return 0; /* Not matched */
1292 wc = uc;
1293 } else {
1294 if (uc != 0xFFFF) return 0; /* Check filler */
1295 }
1296 }
1297
1298 if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) /* Last segment matched but different length */
1299 return 0;
1300
1301 return 1; /* The part of LFN matched */
1302}
1303
1304
1305
1306static
1307int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */
1308 WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
1309 BYTE* dir /* Pointer to the LFN entry */
1310)
1311{
1312 UINT i, s;
1313 WCHAR wc, uc;
1314
1315
1316 if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
1317
1318 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1319
1320 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1321 uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */
1322 if (wc) {
1323 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
1324 lfnbuf[i++] = wc = uc; /* Store it */
1325 } else {
1326 if (uc != 0xFFFF) return 0; /* Check filler */
1327 }
1328 }
1329
1330 if (dir[LDIR_Ord] & LLEF) { /* Put terminator if it is the last LFN part */
1331 if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
1332 lfnbuf[i] = 0;
1333 }
1334
1335 return 1; /* The part of LFN is valid */
1336}
1337
1338
1339#if !_FS_READONLY
1340static
1341void fit_lfn (
1342 const WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
1343 BYTE* dir, /* Pointer to the LFN entry to be processed */
1344 BYTE ord, /* LFN order (1-20) */
1345 BYTE sum /* Checksum of the corresponding SFN */
1346)
1347{
1348 UINT i, s;
1349 WCHAR wc;
1350
1351
1352 dir[LDIR_Chksum] = sum; /* Set checksum */
1353 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
1354 dir[LDIR_Type] = 0;
1355 ST_WORD(dir + LDIR_FstClusLO, 0);
1356
1357 i = (ord - 1) * 13; /* Get offset in the LFN working buffer */
1358 s = wc = 0;
1359 do {
1360 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective character */
1361 ST_WORD(dir+LfnOfs[s], wc); /* Put it */
1362 if (!wc) wc = 0xFFFF; /* Padding characters following last character */
1363 } while (++s < 13);
1364 if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLEF; /* Bottom LFN part is the start of LFN sequence */
1365 dir[LDIR_Ord] = ord; /* Set the LFN order */
1366}
1367
1368#endif
1369#endif
1370
1371
1372
1373
1374/*-----------------------------------------------------------------------*/
1375/* Create numbered name */
1376/*-----------------------------------------------------------------------*/
1377#if _USE_LFN
1378static
1379void gen_numname (
1380 BYTE* dst, /* Pointer to the buffer to store numbered SFN */
1381 const BYTE* src, /* Pointer to SFN */
1382 const WCHAR* lfn, /* Pointer to LFN */
1383 UINT seq /* Sequence number */
1384)
1385{
1386 BYTE ns[8], c;
1387 UINT i, j;
1388 WCHAR wc;
1389 DWORD sr;
1390
1391
1392 mem_cpy(dst, src, 11);
1393
1394 if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */
1395 sr = seq;
1396 while (*lfn) { /* Create a CRC */
1397 wc = *lfn++;
1398 for (i = 0; i < 16; i++) {
1399 sr = (sr << 1) + (wc & 1);
1400 wc >>= 1;
1401 if (sr & 0x10000) sr ^= 0x11021;
1402 }
1403 }
1404 seq = (UINT)sr;
1405 }
1406
1407 /* itoa (hexdecimal) */
1408 i = 7;
1409 do {
1410 c = (seq % 16) + '0';
1411 if (c > '9') c += 7;
1412 ns[i--] = c;
1413 seq /= 16;
1414 } while (seq);
1415 ns[i] = '~';
1416
1417 /* Append the number */
1418 for (j = 0; j < i && dst[j] != ' '; j++) {
1419 if (IsDBCS1(dst[j])) {
1420 if (j == i - 1) break;
1421 j++;
1422 }
1423 }
1424 do {
1425 dst[j++] = (i < 8) ? ns[i++] : ' ';
1426 } while (j < 8);
1427}
1428#endif
1429
1430
1431
1432
1433/*-----------------------------------------------------------------------*/
1434/* Calculate checksum of an SFN entry */
1435/*-----------------------------------------------------------------------*/
1436#if _USE_LFN
1437static
1438BYTE sum_sfn (
1439 const BYTE* dir /* Pointer to the SFN entry */
1440)
1441{
1442 BYTE sum = 0;
1443 UINT n = 11;
1444
1445 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
1446 return sum;
1447}
1448#endif
1449
1450
1451
1452
1453/*-----------------------------------------------------------------------*/
1454/* Directory handling - Find an object in the directory */
1455/*-----------------------------------------------------------------------*/
1456
1457static
1458FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */
1459 DIR* dp /* Pointer to the directory object linked to the file name */
1460)
1461{
1462 FRESULT res;
1463 BYTE c, *dir;
1464#if _USE_LFN
1465 BYTE a, ord, sum;
1466#endif
1467
1468 res = dir_sdi(dp, 0); /* Rewind directory object */
1469 if (res != FR_OK) return res;
1470
1471#if _USE_LFN
1472 ord = sum = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1473#endif
1474 do {
1475 res = move_window(dp->fs, dp->sect);
1476 if (res != FR_OK) break;
1477 dir = dp->dir; /* Ptr to the directory entry of current index */
1478 c = dir[DIR_Name];
1479 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
1480#if _USE_LFN /* LFN configuration */
1481 a = dir[DIR_Attr] & AM_MASK;
1482 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
1483 ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1484 } else {
1485 if (a == AM_LFN) { /* An LFN entry is found */
1486 if (dp->lfn) {
1487 if (c & LLEF) { /* Is it start of LFN sequence? */
1488 sum = dir[LDIR_Chksum];
1489 c &= ~LLEF; ord = c; /* LFN start order */
1490 dp->lfn_idx = dp->index; /* Start index of LFN */
1491 }
1492 /* Check validity of the LFN entry and compare it with given name */
1493 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
1494 }
1495 } else { /* An SFN entry is found */
1496 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
1497 if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dir, dp->fn, 11)) break; /* SFN matched? */
1498 ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1499 }
1500 }
1501#else /* Non LFN configuration */
1502 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dp->fn, 11)) /* Is it a valid entry? */
1503 break;
1504#endif
1505 res = dir_next(dp, 0); /* Next entry */
1506 } while (res == FR_OK);
1507
1508 return res;
1509}
1510
1511
1512
1513
1514/*-----------------------------------------------------------------------*/
1515/* Read an object from the directory */
1516/*-----------------------------------------------------------------------*/
1517#if _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2
1518static
1519FRESULT dir_read (
1520 DIR* dp, /* Pointer to the directory object */
1521 int vol /* Filtered by 0:file/directory or 1:volume label */
1522)
1523{
1524 FRESULT res;
1525 BYTE a, c, *dir;
1526#if _USE_LFN
1527 BYTE ord = 0xFF, sum = 0xFF;
1528#endif
1529
1530 res = FR_NO_FILE;
1531 while (dp->sect) {
1532 res = move_window(dp->fs, dp->sect);
1533 if (res != FR_OK) break;
1534 dir = dp->dir; /* Ptr to the directory entry of current index */
1535 c = dir[DIR_Name];
1536 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
1537 a = dir[DIR_Attr] & AM_MASK;
1538#if _USE_LFN /* LFN configuration */
1539 if (c == DDEM || (!_FS_RPATH && c == '.') || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */
1540 ord = 0xFF;
1541 } else {
1542 if (a == AM_LFN) { /* An LFN entry is found */
1543 if (c & LLEF) { /* Is it start of LFN sequence? */
1544 sum = dir[LDIR_Chksum];
1545 c &= ~LLEF; ord = c;
1546 dp->lfn_idx = dp->index;
1547 }
1548 /* Check LFN validity and capture it */
1549 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
1550 } else { /* An SFN entry is found */
1551 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
1552 dp->lfn_idx = 0xFFFF; /* It has no LFN. */
1553 break;
1554 }
1555 }
1556#else /* Non LFN configuration */
1557 if (c != DDEM && (_FS_RPATH || c != '.') && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) /* Is it a valid entry? */
1558 break;
1559#endif
1560 res = dir_next(dp, 0); /* Next entry */
1561 if (res != FR_OK) break;
1562 }
1563
1564 if (res != FR_OK) dp->sect = 0;
1565
1566 return res;
1567}
1568#endif /* _FS_MINIMIZE <= 1 || _USE_LABEL || _FS_RPATH >= 2 */
1569
1570
1571
1572
1573/*-----------------------------------------------------------------------*/
1574/* Register an object to the directory */
1575/*-----------------------------------------------------------------------*/
1576#if !_FS_READONLY
1577static
1578FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */
1579 DIR* dp /* Target directory with object name to be created */
1580)
1581{
1582 FRESULT res;
1583#if _USE_LFN /* LFN configuration */
1584 UINT n, nent;
1585 BYTE sn[12], *fn, sum;
1586 WCHAR *lfn;
1587
1588
1589 fn = dp->fn; lfn = dp->lfn;
1590 mem_cpy(sn, fn, 12);
1591
1592 if (_FS_RPATH && (sn[NSFLAG] & NS_DOT)) /* Cannot create dot entry */
1593 return FR_INVALID_NAME;
1594
1595 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
1596 fn[NSFLAG] = 0; dp->lfn = 0; /* Find only SFN */
1597 for (n = 1; n < 100; n++) {
1598 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
1599 res = dir_find(dp); /* Check if the name collides with existing SFN */
1600 if (res != FR_OK) break;
1601 }
1602 if (n == 100) return FR_DENIED; /* Abort if too many collisions */
1603 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
1604 fn[NSFLAG] = sn[NSFLAG]; dp->lfn = lfn;
1605 }
1606
1607 if (sn[NSFLAG] & NS_LFN) { /* When LFN is to be created, allocate entries for an SFN + LFNs. */
1608 for (n = 0; lfn[n]; n++) ;
1609 nent = (n + 25) / 13;
1610 } else { /* Otherwise allocate an entry for an SFN */
1611 nent = 1;
1612 }
1613 res = dir_alloc(dp, nent); /* Allocate entries */
1614
1615 if (res == FR_OK && --nent) { /* Set LFN entry if needed */
1616 res = dir_sdi(dp, dp->index - nent);
1617 if (res == FR_OK) {
1618 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */
1619 do { /* Store LFN entries in bottom first */
1620 res = move_window(dp->fs, dp->sect);
1621 if (res != FR_OK) break;
1622 fit_lfn(dp->lfn, dp->dir, (BYTE)nent, sum);
1623 dp->fs->wflag = 1;
1624 res = dir_next(dp, 0); /* Next entry */
1625 } while (res == FR_OK && --nent);
1626 }
1627 }
1628#else /* Non LFN configuration */
1629 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */
1630#endif
1631
1632 if (res == FR_OK) { /* Set SFN entry */
1633 res = move_window(dp->fs, dp->sect);
1634 if (res == FR_OK) {
1635 mem_set(dp->dir, 0, SZ_DIRE); /* Clean the entry */
1636 mem_cpy(dp->dir, dp->fn, 11); /* Put SFN */
1637#if _USE_LFN
1638 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */
1639#endif
1640 dp->fs->wflag = 1;
1641 }
1642 }
1643
1644 return res;
1645}
1646#endif /* !_FS_READONLY */
1647
1648
1649
1650
1651/*-----------------------------------------------------------------------*/
1652/* Remove an object from the directory */
1653/*-----------------------------------------------------------------------*/
1654#if !_FS_READONLY && !_FS_MINIMIZE
1655static
1656FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */
1657 DIR* dp /* Directory object pointing the entry to be removed */
1658)
1659{
1660 FRESULT res;
1661#if _USE_LFN /* LFN configuration */
1662 UINT i;
1663
1664 i = dp->index; /* SFN index */
1665 res = dir_sdi(dp, (dp->lfn_idx == 0xFFFF) ? i : dp->lfn_idx); /* Goto the SFN or top of the LFN entries */
1666 if (res == FR_OK) {
1667 do {
1668 res = move_window(dp->fs, dp->sect);
1669 if (res != FR_OK) break;
1670 mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */
1671 *dp->dir = DDEM;
1672 dp->fs->wflag = 1;
1673 if (dp->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
1674 res = dir_next(dp, 0); /* Next entry */
1675 } while (res == FR_OK);
1676 if (res == FR_NO_FILE) res = FR_INT_ERR;
1677 }
1678
1679#else /* Non LFN configuration */
1680 res = dir_sdi(dp, dp->index);
1681 if (res == FR_OK) {
1682 res = move_window(dp->fs, dp->sect);
1683 if (res == FR_OK) {
1684 mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */
1685 *dp->dir = DDEM;
1686 dp->fs->wflag = 1;
1687 }
1688 }
1689#endif
1690
1691 return res;
1692}
1693#endif /* !_FS_READONLY */
1694
1695
1696
1697
1698/*-----------------------------------------------------------------------*/
1699/* Get file information from directory entry */
1700/*-----------------------------------------------------------------------*/
1701#if _FS_MINIMIZE <= 1 || _FS_RPATH >= 2
1702static
1703void get_fileinfo ( /* No return code */
1704 DIR* dp, /* Pointer to the directory object */
1705 FILINFO* fno /* Pointer to the file information to be filled */
1706)
1707{
1708 UINT i;
1709 TCHAR *p, c;
1710 BYTE *dir;
1711#if _USE_LFN
1712 WCHAR w, *lfn;
1713#endif
1714
1715 p = fno->fname;
1716 if (dp->sect) { /* Get SFN */
1717 dir = dp->dir;
1718 i = 0;
1719 while (i < 11) { /* Copy name body and extension */
1720 c = (TCHAR)dir[i++];
1721 if (c == ' ') continue; /* Skip padding spaces */
1722 if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */
1723 if (i == 9) *p++ = '.'; /* Insert a . if extension is exist */
1724#if _USE_LFN
1725 if (IsUpper(c) && (dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY)))
1726 c += 0x20; /* To lower */
1727#if _LFN_UNICODE
1728 if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dir[i]))
1729 c = c << 8 | dir[i++];
1730 c = ff_convert(c, 1); /* OEM -> Unicode */
1731 if (!c) c = '?';
1732#endif
1733#endif
1734 *p++ = c;
1735 }
1736 fno->fattrib = dir[DIR_Attr]; /* Attribute */
1737 fno->fsize = LD_DWORD(dir + DIR_FileSize); /* Size */
1738 fno->fdate = LD_WORD(dir + DIR_WrtDate); /* Date */
1739 fno->ftime = LD_WORD(dir + DIR_WrtTime); /* Time */
1740 }
1741 *p = 0; /* Terminate SFN string by a \0 */
1742
1743#if _USE_LFN
1744 if (fno->lfname) {
1745 i = 0; p = fno->lfname;
1746 if (dp->sect && fno->lfsize && dp->lfn_idx != 0xFFFF) { /* Get LFN if available */
1747 lfn = dp->lfn;
1748 while ((w = *lfn++) != 0) { /* Get an LFN character */
1749#if !_LFN_UNICODE
1750 w = ff_convert(w, 0); /* Unicode -> OEM */
1751 if (!w) { i = 0; break; } /* No LFN if it could not be converted */
1752 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
1753 p[i++] = (TCHAR)(w >> 8);
1754#endif
1755 if (i >= fno->lfsize - 1) { i = 0; break; } /* No LFN if buffer overflow */
1756 p[i++] = (TCHAR)w;
1757 }
1758 }
1759 p[i] = 0; /* Terminate LFN string by a \0 */
1760 }
1761#endif
1762}
1763#endif /* _FS_MINIMIZE <= 1 || _FS_RPATH >= 2 */
1764
1765
1766
1767
1768/*-----------------------------------------------------------------------*/
1769/* Pattern matching */
1770/*-----------------------------------------------------------------------*/
1771#if _USE_FIND && _FS_MINIMIZE <= 1
1772static
1773WCHAR get_achar ( /* Get a character and advances ptr 1 or 2 */
1774 const TCHAR** ptr /* Pointer to pointer to the SBCS/DBCS/Unicode string */
1775)
1776{
1777 WCHAR chr;
1778
1779#if !_LFN_UNICODE
1780 chr = (BYTE)*(*ptr)++; /* Get a byte */
1781 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */
1782 if (IsDBCS1(chr) && IsDBCS2(**ptr)) /* Get DBC 2nd byte if needed */
1783 chr = chr << 8 | (BYTE)*(*ptr)++;
1784#ifdef _EXCVT
1785 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
1786#endif
1787#else
1788 chr = ff_wtoupper(*(*ptr)++); /* Get a word and to upper */
1789#endif
1790 return chr;
1791}
1792
1793
1794static
1795int pattern_matching ( /* 0:mismatched, 1:matched */
1796 const TCHAR* pat, /* Matching pattern */
1797 const TCHAR* nam, /* String to be tested */
1798 int skip, /* Number of pre-skip chars (number of ?s) */
1799 int inf /* Infinite search (* specified) */
1800)
1801{
1802 const TCHAR *pp, *np;
1803 WCHAR pc, nc;
1804 int nm, nx;
1805
1806
1807 while (skip--) { /* Pre-skip name chars */
1808 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */
1809 }
1810 if (!*pat && inf) return 1; /* (short circuit) */
1811
1812 do {
1813 pp = pat; np = nam; /* Top of pattern and name to match */
1814 for (;;) {
1815 if (*pp == '?' || *pp == '*') { /* Wildcard? */
1816 nm = nx = 0;
1817 do { /* Analyze the wildcard chars */
1818 if (*pp++ == '?') nm++; else nx = 1;
1819 } while (*pp == '?' || *pp == '*');
1820 if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */
1821 nc = *np; break; /* Branch mismatched */
1822 }
1823 pc = get_achar(&pp); /* Get a pattern char */
1824 nc = get_achar(&np); /* Get a name char */
1825 if (pc != nc) break; /* Branch mismatched? */
1826 if (!pc) return 1; /* Branch matched? (matched at end of both strings) */
1827 }
1828 get_achar(&nam); /* nam++ */
1829 } while (inf && nc); /* Retry until end of name if infinite search is specified */
1830
1831 return 0;
1832}
1833#endif /* _USE_FIND && _FS_MINIMIZE <= 1 */
1834
1835
1836
1837
1838/*-----------------------------------------------------------------------*/
1839/* Pick a top segment and create the object name in directory form */
1840/*-----------------------------------------------------------------------*/
1841
1842static
1843FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */
1844 DIR* dp, /* Pointer to the directory object */
1845 const TCHAR** path /* Pointer to pointer to the segment in the path string */
1846)
1847{
1848#if _USE_LFN /* LFN configuration */
1849 BYTE b, cf;
1850 WCHAR w, *lfn;
1851 UINT i, ni, si, di;
1852 const TCHAR *p;
1853
1854 /* Create LFN in Unicode */
1855 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
1856 lfn = dp->lfn;
1857 si = di = 0;
1858 for (;;) {
1859 w = p[si++]; /* Get a character */
1860 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */
1861 if (di >= _MAX_LFN) /* Reject too long name */
1862 return FR_INVALID_NAME;
1863#if !_LFN_UNICODE
1864 w &= 0xFF;
1865 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
1866 b = (BYTE)p[si++]; /* Get 2nd byte */
1867 w = (w << 8) + b; /* Create a DBC */
1868 if (!IsDBCS2(b))
1869 return FR_INVALID_NAME; /* Reject invalid sequence */
1870 }
1871 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */
1872 if (!w) return FR_INVALID_NAME; /* Reject invalid code */
1873#endif
1874 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal characters for LFN */
1875 return FR_INVALID_NAME;
1876 lfn[di++] = w; /* Store the Unicode character */
1877 }
1878 *path = &p[si]; /* Return pointer to the next segment */
1879 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
1880#if _FS_RPATH
1881 if ((di == 1 && lfn[di - 1] == '.') ||
1882 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot entry? */
1883 lfn[di] = 0;
1884 for (i = 0; i < 11; i++) /* Create dot name for SFN entry */
1885 dp->fn[i] = (i < di) ? '.' : ' ';
1886 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */
1887 return FR_OK;
1888 }
1889#endif
1890 while (di) { /* Snip off trailing spaces and dots if exist */
1891 w = lfn[di - 1];
1892 if (w != ' ' && w != '.') break;
1893 di--;
1894 }
1895 if (!di) return FR_INVALID_NAME; /* Reject nul string */
1896 lfn[di] = 0; /* LFN is created */
1897
1898 /* Create SFN in directory form */
1899 mem_set(dp->fn, ' ', 11);
1900 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
1901 if (si) cf |= NS_LOSS | NS_LFN;
1902 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
1903
1904 b = i = 0; ni = 8;
1905 for (;;) {
1906 w = lfn[si++]; /* Get an LFN character */
1907 if (!w) break; /* Break on end of the LFN */
1908 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
1909 cf |= NS_LOSS | NS_LFN; continue;
1910 }
1911
1912 if (i >= ni || si == di) { /* Extension or end of SFN */
1913 if (ni == 11) { /* Long extension */
1914 cf |= NS_LOSS | NS_LFN; break;
1915 }
1916 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
1917 if (si > di) break; /* No extension */
1918 si = di; i = 8; ni = 11; /* Enter extension section */
1919 b <<= 2; continue;
1920 }
1921
1922 if (w >= 0x80) { /* Non ASCII character */
1923#ifdef _EXCVT
1924 w = ff_convert(w, 0); /* Unicode -> OEM code */
1925 if (w) w = ExCvt[w - 0x80]; /* Convert extended character to upper (SBCS) */
1926#else
1927 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
1928#endif
1929 cf |= NS_LFN; /* Force create LFN entry */
1930 }
1931
1932 if (_DF1S && w >= 0x100) { /* Is this DBC? (always false at SBCS cfg) */
1933 if (i >= ni - 1) {
1934 cf |= NS_LOSS | NS_LFN; i = ni; continue;
1935 }
1936 dp->fn[i++] = (BYTE)(w >> 8);
1937 } else { /* SBC */
1938 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */
1939 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
1940 } else {
1941 if (IsUpper(w)) { /* ASCII large capital */
1942 b |= 2;
1943 } else {
1944 if (IsLower(w)) { /* ASCII small capital */
1945 b |= 1; w -= 0x20;
1946 }
1947 }
1948 }
1949 }
1950 dp->fn[i++] = (BYTE)w;
1951 }
1952
1953 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
1954
1955 if (ni == 8) b <<= 2;
1956 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
1957 cf |= NS_LFN;
1958 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */
1959 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
1960 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
1961 }
1962
1963 dp->fn[NSFLAG] = cf; /* SFN is created */
1964
1965 return FR_OK;
1966
1967
1968#else /* Non-LFN configuration */
1969 BYTE b, c, d, *sfn;
1970 UINT ni, si, i;
1971 const char *p;
1972
1973 /* Create file name in directory form */
1974 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Skip duplicated separator */
1975 sfn = dp->fn;
1976 mem_set(sfn, ' ', 11);
1977 si = i = b = 0; ni = 8;
1978#if _FS_RPATH
1979 if (p[si] == '.') { /* Is this a dot entry? */
1980 for (;;) {
1981 c = (BYTE)p[si++];
1982 if (c != '.' || si >= 3) break;
1983 sfn[i++] = c;
1984 }
1985 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
1986 *path = &p[si]; /* Return pointer to the next segment */
1987 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */
1988 return FR_OK;
1989 }
1990#endif
1991 for (;;) {
1992 c = (BYTE)p[si++];
1993 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */
1994 if (c == '.' || i >= ni) {
1995 if (ni != 8 || c != '.') return FR_INVALID_NAME;
1996 i = 8; ni = 11;
1997 b <<= 2; continue;
1998 }
1999 if (c >= 0x80) { /* Extended character? */
2000 b |= 3; /* Eliminate NT flag */
2001#ifdef _EXCVT
2002 c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */
2003#else
2004#if !_DF1S
2005 return FR_INVALID_NAME; /* Reject extended characters (ASCII cfg) */
2006#endif
2007#endif
2008 }
2009 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false at SBCS cfg.) */
2010 d = (BYTE)p[si++]; /* Get 2nd byte */
2011 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
2012 return FR_INVALID_NAME;
2013 sfn[i++] = c;
2014 sfn[i++] = d;
2015 } else { /* SBC */
2016 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */
2017 return FR_INVALID_NAME;
2018 if (IsUpper(c)) { /* ASCII large capital? */
2019 b |= 2;
2020 } else {
2021 if (IsLower(c)) { /* ASCII small capital? */
2022 b |= 1; c -= 0x20;
2023 }
2024 }
2025 sfn[i++] = c;
2026 }
2027 }
2028 *path = &p[si]; /* Return pointer to the next segment */
2029 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
2030
2031 if (!i) return FR_INVALID_NAME; /* Reject nul string */
2032 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* When first character collides with DDEM, replace it with RDDEM */
2033
2034 if (ni == 8) b <<= 2;
2035 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */
2036 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */
2037
2038 sfn[NSFLAG] = c; /* Store NT flag, File name is created */
2039
2040 return FR_OK;
2041#endif
2042}
2043
2044
2045
2046
2047/*-----------------------------------------------------------------------*/
2048/* Follow a file path */
2049/*-----------------------------------------------------------------------*/
2050
2051static
2052FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
2053 DIR* dp, /* Directory object to return last directory and found object */
2054 const TCHAR* path /* Full-path string to find a file or directory */
2055)
2056{
2057 FRESULT res;
2058 BYTE *dir, ns;
2059
2060
2061#if _FS_RPATH
2062 if (*path == '/' || *path == '\\') { /* There is a heading separator */
2063 path++; dp->sclust = 0; /* Strip it and start from the root directory */
2064 } else { /* No heading separator */
2065 dp->sclust = dp->fs->cdir; /* Start from the current directory */
2066 }
2067#else
2068 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
2069 path++;
2070 dp->sclust = 0; /* Always start from the root directory */
2071#endif
2072
2073 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */
2074 res = dir_sdi(dp, 0);
2075 dp->dir = 0;
2076 } else { /* Follow path */
2077 for (;;) {
2078 res = create_name(dp, &path); /* Get a segment name of the path */
2079 if (res != FR_OK) break;
2080 res = dir_find(dp); /* Find an object with the sagment name */
2081 ns = dp->fn[NSFLAG];
2082 if (res != FR_OK) { /* Failed to find the object */
2083 if (res == FR_NO_FILE) { /* Object is not found */
2084 if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, */
2085 dp->sclust = 0; dp->dir = 0; /* it is the root directory and stay there */
2086 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */
2087 res = FR_OK; /* Ended at the root directroy. Function completed. */
2088 } else { /* Could not find the object */
2089 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */
2090 }
2091 }
2092 break;
2093 }
2094 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */
2095 dir = dp->dir; /* Follow the sub-directory */
2096 if (!(dir[DIR_Attr] & AM_DIR)) { /* It is not a sub-directory and cannot follow */
2097 res = FR_NO_PATH; break;
2098 }
2099 dp->sclust = ld_clust(dp->fs, dir);
2100 }
2101 }
2102
2103 return res;
2104}
2105
2106
2107
2108
2109/*-----------------------------------------------------------------------*/
2110/* Get logical drive number from path name */
2111/*-----------------------------------------------------------------------*/
2112
2113static
2114int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */
2115 const TCHAR** path /* Pointer to pointer to the path name */
2116)
2117{
2118 const TCHAR *tp, *tt;
2119 UINT i;
2120 int vol = -1;
2121#if _STR_VOLUME_ID /* Find string drive id */
2122 static const char* const str[] = {_VOLUME_STRS};
2123 const char *sp;
2124 char c;
2125 TCHAR tc;
2126#endif
2127
2128
2129 if (*path) { /* If the pointer is not a null */
2130 for (tt = *path; (UINT)*tt >= (_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find ':' in the path */
2131 if (*tt == ':') { /* If a ':' is exist in the path name */
2132 tp = *path;
2133 i = *tp++ - '0';
2134 if (i < 10 && tp == tt) { /* Is there a numeric drive id? */
2135 if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
2136 vol = (int)i;
2137 *path = ++tt;
2138 }
2139 }
2140#if _STR_VOLUME_ID
2141 else { /* No numeric drive number, find string drive id */
2142 i = 0; tt++;
2143 do {
2144 sp = str[i]; tp = *path;
2145 do { /* Compare a string drive id with path name */
2146 c = *sp++; tc = *tp++;
2147 if (IsLower(tc)) tc -= 0x20;
2148 } while (c && (TCHAR)c == tc);
2149 } while ((c || tp != tt) && ++i < _VOLUMES); /* Repeat for each id until pattern match */
2150 if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
2151 vol = (int)i;
2152 *path = tt;
2153 }
2154 }
2155#endif
2156 return vol;
2157 }
2158#if _FS_RPATH && _VOLUMES >= 2
2159 vol = CurrVol; /* Current drive */
2160#else
2161 vol = 0; /* Drive 0 */
2162#endif
2163 }
2164 return vol;
2165}
2166
2167
2168
2169
2170/*-----------------------------------------------------------------------*/
2171/* Load a sector and check if it is an FAT boot sector */
2172/*-----------------------------------------------------------------------*/
2173
2174static
2175BYTE check_fs ( /* 0:Valid FAT-BS, 1:Valid BS but not FAT, 2:Not a BS, 3:Disk error */
2176 FATFS* fs, /* File system object */
2177 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
2178)
2179{
2180 fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */
2181 if (move_window(fs, sect) != FR_OK) /* Load boot record */
2182 return 3;
2183
2184 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */
2185 return 2;
2186
2187 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
2188 return 0;
2189 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
2190 return 0;
2191
2192 return 1;
2193}
2194
2195
2196
2197
2198/*-----------------------------------------------------------------------*/
2199/* Find logical drive and check if the volume is mounted */
2200/*-----------------------------------------------------------------------*/
2201
2202static
2203FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */
2204 FATFS** rfs, /* Pointer to pointer to the found file system object */
2205 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
2206 BYTE wmode /* !=0: Check write protection for write access */
2207)
2208{
2209 BYTE fmt, *pt;
2210 int vol;
2211 DSTATUS stat;
2212 DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4];
2213 WORD nrsv;
2214 FATFS *fs;
2215 UINT i;
2216
2217
2218 /* Get logical drive number from the path name */
2219 *rfs = 0;
2220 vol = get_ldnumber(path);
2221 if (vol < 0) return FR_INVALID_DRIVE;
2222
2223 /* Check if the file system object is valid or not */
2224 fs = FatFs[vol]; /* Get pointer to the file system object */
2225 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
2226
2227 ENTER_FF(fs); /* Lock the volume */
2228 *rfs = fs; /* Return pointer to the file system object */
2229
2230 if (fs->fs_type) { /* If the volume has been mounted */
2231 stat = disk_status(fs->drv);
2232 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */
2233 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */
2234 return FR_WRITE_PROTECTED;
2235 return FR_OK; /* The file system object is valid */
2236 }
2237 }
2238
2239 /* The file system object is not valid. */
2240 /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
2241
2242 fs->fs_type = 0; /* Clear the file system object */
2243 fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */
2244 stat = disk_initialize(fs->drv); /* Initialize the physical drive */
2245 if (stat & STA_NOINIT) /* Check if the initialization succeeded */
2246 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
2247 if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */
2248 return FR_WRITE_PROTECTED;
2249#if _MAX_SS != _MIN_SS /* Get sector size (multiple sector size cfg only) */
2250 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
2251 || SS(fs) < _MIN_SS || SS(fs) > _MAX_SS) return FR_DISK_ERR;
2252#endif
2253 /* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */
2254 bsect = 0;
2255 fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT boot sector as SFD */
2256 if (fmt == 1 || (!fmt && (LD2PT(vol)))) { /* Not an FAT boot sector or forced partition number */
2257 for (i = 0; i < 4; i++) { /* Get partition offset */
2258 pt = fs->win + MBR_Table + i * SZ_PTE;
2259 br[i] = pt[4] ? LD_DWORD(&pt[8]) : 0;
2260 }
2261 i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */
2262 if (i) i--;
2263 do { /* Find an FAT volume */
2264 bsect = br[i];
2265 fmt = bsect ? check_fs(fs, bsect) : 2; /* Check the partition */
2266 } while (!LD2PT(vol) && fmt && ++i < 4);
2267 }
2268 if (fmt == 3) return FR_DISK_ERR; /* An error occured in the disk I/O layer */
2269 if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */
2270
2271 /* An FAT volume is found. Following code initializes the file system object */
2272
2273 if (LD_WORD(fs->win + BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */
2274 return FR_NO_FILESYSTEM;
2275
2276 fasize = LD_WORD(fs->win + BPB_FATSz16); /* Number of sectors per FAT */
2277 if (!fasize) fasize = LD_DWORD(fs->win + BPB_FATSz32);
2278 fs->fsize = fasize;
2279
2280 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */
2281 if (fs->n_fats != 1 && fs->n_fats != 2) /* (Must be 1 or 2) */
2282 return FR_NO_FILESYSTEM;
2283 fasize *= fs->n_fats; /* Number of sectors for FAT area */
2284
2285 fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
2286 if (!fs->csize || (fs->csize & (fs->csize - 1))) /* (Must be power of 2) */
2287 return FR_NO_FILESYSTEM;
2288
2289 fs->n_rootdir = LD_WORD(fs->win + BPB_RootEntCnt); /* Number of root directory entries */
2290 if (fs->n_rootdir % (SS(fs) / SZ_DIRE)) /* (Must be sector aligned) */
2291 return FR_NO_FILESYSTEM;
2292
2293 tsect = LD_WORD(fs->win + BPB_TotSec16); /* Number of sectors on the volume */
2294 if (!tsect) tsect = LD_DWORD(fs->win + BPB_TotSec32);
2295
2296 nrsv = LD_WORD(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */
2297 if (!nrsv) return FR_NO_FILESYSTEM; /* (Must not be 0) */
2298
2299 /* Determine the FAT sub type */
2300 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIRE); /* RSV + FAT + DIR */
2301 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
2302 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
2303 if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
2304 fmt = FS_FAT12;
2305 if (nclst >= MIN_FAT16) fmt = FS_FAT16;
2306 if (nclst >= MIN_FAT32) fmt = FS_FAT32;
2307
2308 /* Boundaries and Limits */
2309 fs->n_fatent = nclst + 2; /* Number of FAT entries */
2310 fs->volbase = bsect; /* Volume start sector */
2311 fs->fatbase = bsect + nrsv; /* FAT start sector */
2312 fs->database = bsect + sysect; /* Data start sector */
2313 if (fmt == FS_FAT32) {
2314 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
2315 fs->dirbase = LD_DWORD(fs->win + BPB_RootClus); /* Root directory start cluster */
2316 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */
2317 } else {
2318 if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
2319 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
2320 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */
2321 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
2322 }
2323 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than the size needed) */
2324 return FR_NO_FILESYSTEM;
2325
2326#if !_FS_READONLY
2327 /* Initialize cluster allocation information */
2328 fs->last_clust = fs->free_clust = 0xFFFFFFFF;
2329
2330 /* Get fsinfo if available */
2331 fs->fsi_flag = 0x80;
2332#if (_FS_NOFSINFO & 3) != 3
2333 if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo == 1 */
2334 && LD_WORD(fs->win + BPB_FSInfo) == 1
2335 && move_window(fs, bsect + 1) == FR_OK)
2336 {
2337 fs->fsi_flag = 0;
2338 if (LD_WORD(fs->win + BS_55AA) == 0xAA55 /* Load FSINFO data if available */
2339 && LD_DWORD(fs->win + FSI_LeadSig) == 0x41615252
2340 && LD_DWORD(fs->win + FSI_StrucSig) == 0x61417272)
2341 {
2342#if (_FS_NOFSINFO & 1) == 0
2343 fs->free_clust = LD_DWORD(fs->win + FSI_Free_Count);
2344#endif
2345#if (_FS_NOFSINFO & 2) == 0
2346 fs->last_clust = LD_DWORD(fs->win + FSI_Nxt_Free);
2347#endif
2348 }
2349 }
2350#endif
2351#endif
2352 fs->fs_type = fmt; /* FAT sub-type */
2353 fs->id = ++Fsid; /* File system mount ID */
2354#if _FS_RPATH
2355 fs->cdir = 0; /* Set current directory to root */
2356#endif
2357#if _FS_LOCK /* Clear file lock semaphores */
2358 clear_lock(fs);
2359#endif
2360
2361 return FR_OK;
2362}
2363
2364
2365
2366
2367/*-----------------------------------------------------------------------*/
2368/* Check if the file/directory object is valid or not */
2369/*-----------------------------------------------------------------------*/
2370
2371static
2372FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
2373 void* obj /* Pointer to the object FIL/DIR to check validity */
2374)
2375{
2376 FIL *fil = (FIL*)obj; /* Assuming offset of .fs and .id in the FIL/DIR structure is identical */
2377
2378
2379 if (!fil || !fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id || (disk_status(fil->fs->drv) & STA_NOINIT))
2380 return FR_INVALID_OBJECT;
2381
2382 ENTER_FF(fil->fs); /* Lock file system */
2383
2384 return FR_OK;
2385}
2386
2387
2388
2389
2390/*--------------------------------------------------------------------------
2391
2392 Public Functions
2393
2394---------------------------------------------------------------------------*/
2395
2396
2397
2398/*-----------------------------------------------------------------------*/
2399/* Mount/Unmount a Logical Drive */
2400/*-----------------------------------------------------------------------*/
2401
2402FRESULT f_mount (
2403 FATFS* fs, /* Pointer to the file system object (NULL:unmount)*/
2404 const TCHAR* path, /* Logical drive number to be mounted/unmounted */
2405 BYTE opt /* 0:Do not mount (delayed mount), 1:Mount immediately */
2406)
2407{
2408 FATFS *cfs;
2409 int vol;
2410 FRESULT res;
2411 const TCHAR *rp = path;
2412
2413
2414 vol = get_ldnumber(&rp);
2415 if (vol < 0) return FR_INVALID_DRIVE;
2416 cfs = FatFs[vol]; /* Pointer to fs object */
2417
2418 if (cfs) {
2419#if _FS_LOCK
2420 clear_lock(cfs);
2421#endif
2422#if _FS_REENTRANT /* Discard sync object of the current volume */
2423 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
2424#endif
2425 cfs->fs_type = 0; /* Clear old fs object */
2426 }
2427
2428 if (fs) {
2429 fs->fs_type = 0; /* Clear new fs object */
2430#if _FS_REENTRANT /* Create sync object for the new volume */
2431 if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
2432#endif
2433 }
2434 FatFs[vol] = fs; /* Register new fs object */
2435
2436 if (!fs || opt != 1) return FR_OK; /* Do not mount now, it will be mounted later */
2437
2438 res = find_volume(&fs, &path, 0); /* Force mounted the volume */
2439 LEAVE_FF(fs, res);
2440}
2441
2442
2443
2444
2445/*-----------------------------------------------------------------------*/
2446/* Open or Create a File */
2447/*-----------------------------------------------------------------------*/
2448
2449FRESULT f_open (
2450 FIL* fp, /* Pointer to the blank file object */
2451 const TCHAR* path, /* Pointer to the file name */
2452 BYTE mode /* Access mode and file open mode flags */
2453)
2454{
2455 FRESULT res;
2456 DIR dj;
2457 BYTE *dir;
2458 DEFINE_NAMEBUF;
2459#if !_FS_READONLY
2460 DWORD dw, cl;
2461#endif
2462
2463
2464 if (!fp) return FR_INVALID_OBJECT;
2465 fp->fs = 0; /* Clear file object */
2466
2467 /* Get logical drive number */
2468#if !_FS_READONLY
2469 mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW;
2470 res = find_volume(&dj.fs, &path, (BYTE)(mode & ~FA_READ));
2471#else
2472 mode &= FA_READ;
2473 res = find_volume(&dj.fs, &path, 0);
2474#endif
2475 if (res == FR_OK) {
2476 INIT_BUF(dj);
2477 res = follow_path(&dj, path); /* Follow the file path */
2478 dir = dj.dir;
2479#if !_FS_READONLY /* R/W configuration */
2480 if (res == FR_OK) {
2481 if (!dir) /* Default directory itself */
2482 res = FR_INVALID_NAME;
2483#if _FS_LOCK
2484 else
2485 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2486#endif
2487 }
2488 /* Create or Open a file */
2489 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
2490 if (res != FR_OK) { /* No file, create new */
2491 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
2492#if _FS_LOCK
2493 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
2494#else
2495 res = dir_register(&dj);
2496#endif
2497 mode |= FA_CREATE_ALWAYS; /* File is created */
2498 dir = dj.dir; /* New entry */
2499 }
2500 else { /* Any object is already existing */
2501 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */
2502 res = FR_DENIED;
2503 } else {
2504 if (mode & FA_CREATE_NEW) /* Cannot create as new file */
2505 res = FR_EXIST;
2506 }
2507 }
2508 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */
2509 dw = GET_FATTIME();
2510 ST_DWORD(dir + DIR_CrtTime, dw);/* Set created time */
2511 ST_DWORD(dir + DIR_WrtTime, dw);/* Set modified time */
2512 dir[DIR_Attr] = 0; /* Reset attribute */
2513 ST_DWORD(dir + DIR_FileSize, 0);/* Reset file size */
2514 cl = ld_clust(dj.fs, dir); /* Get cluster chain */
2515 st_clust(dir, 0); /* Reset cluster */
2516 dj.fs->wflag = 1;
2517 if (cl) { /* Remove the cluster chain if exist */
2518 dw = dj.fs->winsect;
2519 res = remove_chain(dj.fs, cl);
2520 if (res == FR_OK) {
2521 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
2522 res = move_window(dj.fs, dw);
2523 }
2524 }
2525 }
2526 }
2527 else { /* Open an existing file */
2528 if (res == FR_OK) { /* Following succeeded */
2529 if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */
2530 res = FR_NO_FILE;
2531 } else {
2532 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
2533 res = FR_DENIED;
2534 }
2535 }
2536 }
2537 if (res == FR_OK) {
2538 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */
2539 mode |= FA__WRITTEN;
2540 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
2541 fp->dir_ptr = dir;
2542#if _FS_LOCK
2543 fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2544 if (!fp->lockid) res = FR_INT_ERR;
2545#endif
2546 }
2547
2548#else /* R/O configuration */
2549 if (res == FR_OK) { /* Follow succeeded */
2550 dir = dj.dir;
2551 if (!dir) { /* Current directory itself */
2552 res = FR_INVALID_NAME;
2553 } else {
2554 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */
2555 res = FR_NO_FILE;
2556 }
2557 }
2558#endif
2559 FREE_BUF();
2560
2561 if (res == FR_OK) {
2562 fp->flag = mode; /* File access mode */
2563 fp->err = 0; /* Clear error flag */
2564 fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */
2565 fp->fsize = LD_DWORD(dir + DIR_FileSize); /* File size */
2566 fp->fptr = 0; /* File pointer */
2567 fp->dsect = 0;
2568#if _USE_FASTSEEK
2569 fp->cltbl = 0; /* Normal seek mode */
2570#endif
2571 fp->fs = dj.fs; /* Validate file object */
2572 fp->id = fp->fs->id;
2573 }
2574 }
2575
2576 LEAVE_FF(dj.fs, res);
2577}
2578
2579
2580
2581
2582/*-----------------------------------------------------------------------*/
2583/* Read File */
2584/*-----------------------------------------------------------------------*/
2585
2586FRESULT f_read (
2587 FIL* fp, /* Pointer to the file object */
2588 void* buff, /* Pointer to data buffer */
2589 UINT btr, /* Number of bytes to read */
2590 UINT* br /* Pointer to number of bytes read */
2591)
2592{
2593 FRESULT res;
2594 DWORD clst, sect, remain;
2595 UINT rcnt, cc;
2596 BYTE csect, *rbuff = (BYTE*)buff;
2597
2598
2599 *br = 0; /* Clear read byte counter */
2600
2601 res = validate(fp); /* Check validity */
2602 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2603 if (fp->err) /* Check error */
2604 LEAVE_FF(fp->fs, (FRESULT)fp->err);
2605 if (!(fp->flag & FA_READ)) /* Check access mode */
2606 LEAVE_FF(fp->fs, FR_DENIED);
2607 remain = fp->fsize - fp->fptr;
2608 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
2609
2610 for ( ; btr; /* Repeat until all data read */
2611 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
2612 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2613 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
2614 if (!csect) { /* On the cluster boundary? */
2615 if (fp->fptr == 0) { /* On the top of the file? */
2616 clst = fp->sclust; /* Follow from the origin */
2617 } else { /* Middle or end of the file */
2618#if _USE_FASTSEEK
2619 if (fp->cltbl)
2620 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
2621 else
2622#endif
2623 clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */
2624 }
2625 if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
2626 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2627 fp->clust = clst; /* Update current cluster */
2628 }
2629 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
2630 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2631 sect += csect;
2632 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
2633 if (cc) { /* Read maximum contiguous sectors directly */
2634 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2635 cc = fp->fs->csize - csect;
2636 if (disk_read(fp->fs->drv, rbuff, sect, cc) != RES_OK)
2637 ABORT(fp->fs, FR_DISK_ERR);
2638#if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
2639#if _FS_TINY
2640 if (fp->fs->wflag && fp->fs->winsect - sect < cc)
2641 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
2642#else
2643 if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
2644 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
2645#endif
2646#endif
2647 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
2648 continue;
2649 }
2650#if !_FS_TINY
2651 if (fp->dsect != sect) { /* Load data sector if not in cache */
2652#if !_FS_READONLY
2653 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
2654 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2655 ABORT(fp->fs, FR_DISK_ERR);
2656 fp->flag &= ~FA__DIRTY;
2657 }
2658#endif
2659 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */
2660 ABORT(fp->fs, FR_DISK_ERR);
2661 }
2662#endif
2663 fp->dsect = sect;
2664 }
2665 rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
2666 if (rcnt > btr) rcnt = btr;
2667#if _FS_TINY
2668 if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */
2669 ABORT(fp->fs, FR_DISK_ERR);
2670 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
2671#else
2672 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
2673#endif
2674 }
2675
2676 LEAVE_FF(fp->fs, FR_OK);
2677}
2678
2679
2680
2681
2682#if !_FS_READONLY
2683/*-----------------------------------------------------------------------*/
2684/* Write File */
2685/*-----------------------------------------------------------------------*/
2686
2687FRESULT f_write (
2688 FIL* fp, /* Pointer to the file object */
2689 const void *buff, /* Pointer to the data to be written */
2690 UINT btw, /* Number of bytes to write */
2691 UINT* bw /* Pointer to number of bytes written */
2692)
2693{
2694 FRESULT res;
2695 DWORD clst, sect;
2696 UINT wcnt, cc;
2697 const BYTE *wbuff = (const BYTE*)buff;
2698 BYTE csect;
2699
2700
2701 *bw = 0; /* Clear write byte counter */
2702
2703 res = validate(fp); /* Check validity */
2704 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2705 if (fp->err) /* Check error */
2706 LEAVE_FF(fp->fs, (FRESULT)fp->err);
2707 if (!(fp->flag & FA_WRITE)) /* Check access mode */
2708 LEAVE_FF(fp->fs, FR_DENIED);
2709 if (fp->fptr + btw < fp->fptr) btw = 0; /* File size cannot reach 4GB */
2710
2711 for ( ; btw; /* Repeat until all data written */
2712 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
2713 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2714 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
2715 if (!csect) { /* On the cluster boundary? */
2716 if (fp->fptr == 0) { /* On the top of the file? */
2717 clst = fp->sclust; /* Follow from the origin */
2718 if (clst == 0) /* When no cluster is allocated, */
2719 clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
2720 } else { /* Middle or end of the file */
2721#if _USE_FASTSEEK
2722 if (fp->cltbl)
2723 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
2724 else
2725#endif
2726 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */
2727 }
2728 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
2729 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
2730 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2731 fp->clust = clst; /* Update current cluster */
2732 if (fp->sclust == 0) fp->sclust = clst; /* Set start cluster if the first write */
2733 }
2734#if _FS_TINY
2735 if (fp->fs->winsect == fp->dsect && sync_window(fp->fs)) /* Write-back sector cache */
2736 ABORT(fp->fs, FR_DISK_ERR);
2737#else
2738 if (fp->flag & FA__DIRTY) { /* Write-back sector cache */
2739 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2740 ABORT(fp->fs, FR_DISK_ERR);
2741 fp->flag &= ~FA__DIRTY;
2742 }
2743#endif
2744 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
2745 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2746 sect += csect;
2747 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
2748 if (cc) { /* Write maximum contiguous sectors directly */
2749 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2750 cc = fp->fs->csize - csect;
2751 if (disk_write(fp->fs->drv, wbuff, sect, cc) != RES_OK)
2752 ABORT(fp->fs, FR_DISK_ERR);
2753#if _FS_MINIMIZE <= 2
2754#if _FS_TINY
2755 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2756 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
2757 fp->fs->wflag = 0;
2758 }
2759#else
2760 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2761 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
2762 fp->flag &= ~FA__DIRTY;
2763 }
2764#endif
2765#endif
2766 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
2767 continue;
2768 }
2769#if _FS_TINY
2770 if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */
2771 if (sync_window(fp->fs)) ABORT(fp->fs, FR_DISK_ERR);
2772 fp->fs->winsect = sect;
2773 }
2774#else
2775 if (fp->dsect != sect) { /* Fill sector cache with file data */
2776 if (fp->fptr < fp->fsize &&
2777 disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
2778 ABORT(fp->fs, FR_DISK_ERR);
2779 }
2780#endif
2781 fp->dsect = sect;
2782 }
2783 wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
2784 if (wcnt > btw) wcnt = btw;
2785#if _FS_TINY
2786 if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */
2787 ABORT(fp->fs, FR_DISK_ERR);
2788 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
2789 fp->fs->wflag = 1;
2790#else
2791 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
2792 fp->flag |= FA__DIRTY;
2793#endif
2794 }
2795
2796 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
2797 fp->flag |= FA__WRITTEN; /* Set file change flag */
2798
2799 LEAVE_FF(fp->fs, FR_OK);
2800}
2801
2802
2803
2804
2805/*-----------------------------------------------------------------------*/
2806/* Synchronize the File */
2807/*-----------------------------------------------------------------------*/
2808
2809FRESULT f_sync (
2810 FIL* fp /* Pointer to the file object */
2811)
2812{
2813 FRESULT res;
2814 DWORD tm;
2815 BYTE *dir;
2816
2817
2818 res = validate(fp); /* Check validity of the object */
2819 if (res == FR_OK) {
2820 if (fp->flag & FA__WRITTEN) { /* Is there any change to the file? */
2821#if !_FS_TINY
2822 if (fp->flag & FA__DIRTY) { /* Write-back cached data if needed */
2823 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2824 LEAVE_FF(fp->fs, FR_DISK_ERR);
2825 fp->flag &= ~FA__DIRTY;
2826 }
2827#endif
2828 /* Update the directory entry */
2829 res = move_window(fp->fs, fp->dir_sect);
2830 if (res == FR_OK) {
2831 dir = fp->dir_ptr;
2832 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
2833 ST_DWORD(dir + DIR_FileSize, fp->fsize); /* Update file size */
2834 st_clust(dir, fp->sclust); /* Update start cluster */
2835 tm = GET_FATTIME(); /* Update modified time */
2836 ST_DWORD(dir + DIR_WrtTime, tm);
2837 ST_WORD(dir + DIR_LstAccDate, 0);
2838 fp->flag &= ~FA__WRITTEN;
2839 fp->fs->wflag = 1;
2840 res = sync_fs(fp->fs);
2841 }
2842 }
2843 }
2844
2845 LEAVE_FF(fp->fs, res);
2846}
2847
2848#endif /* !_FS_READONLY */
2849
2850
2851
2852
2853/*-----------------------------------------------------------------------*/
2854/* Close File */
2855/*-----------------------------------------------------------------------*/
2856
2857FRESULT f_close (
2858 FIL *fp /* Pointer to the file object to be closed */
2859)
2860{
2861 FRESULT res;
2862
2863
2864#if !_FS_READONLY
2865 res = f_sync(fp); /* Flush cached data */
2866 if (res == FR_OK)
2867#endif
2868 {
2869 res = validate(fp); /* Lock volume */
2870 if (res == FR_OK) {
2871#if _FS_REENTRANT
2872 FATFS *fs = fp->fs;
2873#endif
2874#if _FS_LOCK
2875 res = dec_lock(fp->lockid); /* Decrement file open counter */
2876 if (res == FR_OK)
2877#endif
2878 fp->fs = 0; /* Invalidate file object */
2879#if _FS_REENTRANT
2880 unlock_fs(fs, FR_OK); /* Unlock volume */
2881#endif
2882 }
2883 }
2884 return res;
2885}
2886
2887
2888
2889
2890/*-----------------------------------------------------------------------*/
2891/* Change Current Directory or Current Drive, Get Current Directory */
2892/*-----------------------------------------------------------------------*/
2893
2894#if _FS_RPATH >= 1
2895#if _VOLUMES >= 2
2896FRESULT f_chdrive (
2897 const TCHAR* path /* Drive number */
2898)
2899{
2900 int vol;
2901
2902
2903 vol = get_ldnumber(&path);
2904 if (vol < 0) return FR_INVALID_DRIVE;
2905
2906 CurrVol = (BYTE)vol;
2907
2908 return FR_OK;
2909}
2910#endif
2911
2912
2913FRESULT f_chdir (
2914 const TCHAR* path /* Pointer to the directory path */
2915)
2916{
2917 FRESULT res;
2918 DIR dj;
2919 DEFINE_NAMEBUF;
2920
2921
2922 /* Get logical drive number */
2923 res = find_volume(&dj.fs, &path, 0);
2924 if (res == FR_OK) {
2925 INIT_BUF(dj);
2926 res = follow_path(&dj, path); /* Follow the path */
2927 FREE_BUF();
2928 if (res == FR_OK) { /* Follow completed */
2929 if (!dj.dir) {
2930 dj.fs->cdir = dj.sclust; /* Start directory itself */
2931 } else {
2932 if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */
2933 dj.fs->cdir = ld_clust(dj.fs, dj.dir);
2934 else
2935 res = FR_NO_PATH; /* Reached but a file */
2936 }
2937 }
2938 if (res == FR_NO_FILE) res = FR_NO_PATH;
2939 }
2940
2941 LEAVE_FF(dj.fs, res);
2942}
2943
2944
2945#if _FS_RPATH >= 2
2946FRESULT f_getcwd (
2947 TCHAR* buff, /* Pointer to the directory path */
2948 UINT len /* Size of path */
2949)
2950{
2951 FRESULT res;
2952 DIR dj;
2953 UINT i, n;
2954 DWORD ccl;
2955 TCHAR *tp;
2956 FILINFO fno;
2957 DEFINE_NAMEBUF;
2958
2959
2960 *buff = 0;
2961 /* Get logical drive number */
2962 res = find_volume(&dj.fs, (const TCHAR**)&buff, 0); /* Get current volume */
2963 if (res == FR_OK) {
2964 INIT_BUF(dj);
2965 i = len; /* Bottom of buffer (directory stack base) */
2966 dj.sclust = dj.fs->cdir; /* Start to follow upper directory from current directory */
2967 while ((ccl = dj.sclust) != 0) { /* Repeat while current directory is a sub-directory */
2968 res = dir_sdi(&dj, 1); /* Get parent directory */
2969 if (res != FR_OK) break;
2970 res = dir_read(&dj, 0);
2971 if (res != FR_OK) break;
2972 dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent directory */
2973 res = dir_sdi(&dj, 0);
2974 if (res != FR_OK) break;
2975 do { /* Find the entry links to the child directory */
2976 res = dir_read(&dj, 0);
2977 if (res != FR_OK) break;
2978 if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */
2979 res = dir_next(&dj, 0);
2980 } while (res == FR_OK);
2981 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
2982 if (res != FR_OK) break;
2983#if _USE_LFN
2984 fno.lfname = buff;
2985 fno.lfsize = i;
2986#endif
2987 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */
2988 tp = fno.fname;
2989#if _USE_LFN
2990 if (*buff) tp = buff;
2991#endif
2992 for (n = 0; tp[n]; n++) ;
2993 if (i < n + 3) {
2994 res = FR_NOT_ENOUGH_CORE; break;
2995 }
2996 while (n) buff[--i] = tp[--n];
2997 buff[--i] = '/';
2998 }
2999 tp = buff;
3000 if (res == FR_OK) {
3001#if _VOLUMES >= 2
3002 *tp++ = '0' + CurrVol; /* Put drive number */
3003 *tp++ = ':';
3004#endif
3005 if (i == len) { /* Root-directory */
3006 *tp++ = '/';
3007 } else { /* Sub-directroy */
3008 do /* Add stacked path str */
3009 *tp++ = buff[i++];
3010 while (i < len);
3011 }
3012 }
3013 *tp = 0;
3014 FREE_BUF();
3015 }
3016
3017 LEAVE_FF(dj.fs, res);
3018}
3019#endif /* _FS_RPATH >= 2 */
3020#endif /* _FS_RPATH >= 1 */
3021
3022
3023
3024#if _FS_MINIMIZE <= 2
3025/*-----------------------------------------------------------------------*/
3026/* Seek File R/W Pointer */
3027/*-----------------------------------------------------------------------*/
3028
3029FRESULT f_lseek (
3030 FIL* fp, /* Pointer to the file object */
3031 DWORD ofs /* File pointer from top of file */
3032)
3033{
3034 FRESULT res;
3035 DWORD clst, bcs, nsect, ifptr;
3036#if _USE_FASTSEEK
3037 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
3038#endif
3039
3040
3041 res = validate(fp); /* Check validity of the object */
3042 if (res != FR_OK) LEAVE_FF(fp->fs, res);
3043 if (fp->err) /* Check error */
3044 LEAVE_FF(fp->fs, (FRESULT)fp->err);
3045
3046#if _USE_FASTSEEK
3047 if (fp->cltbl) { /* Fast seek */
3048 if (ofs == CREATE_LINKMAP) { /* Create CLMT */
3049 tbl = fp->cltbl;
3050 tlen = *tbl++; ulen = 2; /* Given table size and required table size */
3051 cl = fp->sclust; /* Top of the chain */
3052 if (cl) {
3053 do {
3054 /* Get a fragment */
3055 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
3056 do {
3057 pcl = cl; ncl++;
3058 cl = get_fat(fp->fs, cl);
3059 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
3060 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3061 } while (cl == pcl + 1);
3062 if (ulen <= tlen) { /* Store the length and top of the fragment */
3063 *tbl++ = ncl; *tbl++ = tcl;
3064 }
3065 } while (cl < fp->fs->n_fatent); /* Repeat until end of chain */
3066 }
3067 *fp->cltbl = ulen; /* Number of items used */
3068 if (ulen <= tlen)
3069 *tbl = 0; /* Terminate table */
3070 else
3071 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
3072
3073 } else { /* Fast seek */
3074 if (ofs > fp->fsize) /* Clip offset at the file size */
3075 ofs = fp->fsize;
3076 fp->fptr = ofs; /* Set file pointer */
3077 if (ofs) {
3078 fp->clust = clmt_clust(fp, ofs - 1);
3079 dsc = clust2sect(fp->fs, fp->clust);
3080 if (!dsc) ABORT(fp->fs, FR_INT_ERR);
3081 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
3082 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */
3083#if !_FS_TINY
3084#if !_FS_READONLY
3085 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
3086 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
3087 ABORT(fp->fs, FR_DISK_ERR);
3088 fp->flag &= ~FA__DIRTY;
3089 }
3090#endif
3091 if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */
3092 ABORT(fp->fs, FR_DISK_ERR);
3093#endif
3094 fp->dsect = dsc;
3095 }
3096 }
3097 }
3098 } else
3099#endif
3100
3101 /* Normal Seek */
3102 {
3103 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
3104#if !_FS_READONLY
3105 && !(fp->flag & FA_WRITE)
3106#endif
3107 ) ofs = fp->fsize;
3108
3109 ifptr = fp->fptr;
3110 fp->fptr = nsect = 0;
3111 if (ofs) {
3112 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
3113 if (ifptr > 0 &&
3114 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
3115 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
3116 ofs -= fp->fptr;
3117 clst = fp->clust;
3118 } else { /* When seek to back cluster, */
3119 clst = fp->sclust; /* start from the first cluster */
3120#if !_FS_READONLY
3121 if (clst == 0) { /* If no cluster chain, create a new chain */
3122 clst = create_chain(fp->fs, 0);
3123 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
3124 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3125 fp->sclust = clst;
3126 }
3127#endif
3128 fp->clust = clst;
3129 }
3130 if (clst != 0) {
3131 while (ofs > bcs) { /* Cluster following loop */
3132#if !_FS_READONLY
3133 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
3134 clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */
3135 if (clst == 0) { /* When disk gets full, clip file size */
3136 ofs = bcs; break;
3137 }
3138 } else
3139#endif
3140 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
3141 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3142 if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
3143 fp->clust = clst;
3144 fp->fptr += bcs;
3145 ofs -= bcs;
3146 }
3147 fp->fptr += ofs;
3148 if (ofs % SS(fp->fs)) {
3149 nsect = clust2sect(fp->fs, clst); /* Current sector */
3150 if (!nsect) ABORT(fp->fs, FR_INT_ERR);
3151 nsect += ofs / SS(fp->fs);
3152 }
3153 }
3154 }
3155 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */
3156#if !_FS_TINY
3157#if !_FS_READONLY
3158 if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
3159 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
3160 ABORT(fp->fs, FR_DISK_ERR);
3161 fp->flag &= ~FA__DIRTY;
3162 }
3163#endif
3164 if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */
3165 ABORT(fp->fs, FR_DISK_ERR);
3166#endif
3167 fp->dsect = nsect;
3168 }
3169#if !_FS_READONLY
3170 if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */
3171 fp->fsize = fp->fptr;
3172 fp->flag |= FA__WRITTEN;
3173 }
3174#endif
3175 }
3176
3177 LEAVE_FF(fp->fs, res);
3178}
3179
3180
3181
3182#if _FS_MINIMIZE <= 1
3183/*-----------------------------------------------------------------------*/
3184/* Create a Directory Object */
3185/*-----------------------------------------------------------------------*/
3186
3187FRESULT f_opendir (
3188 DIR* dp, /* Pointer to directory object to create */
3189 const TCHAR* path /* Pointer to the directory path */
3190)
3191{
3192 FRESULT res;
3193 FATFS* fs;
3194 DEFINE_NAMEBUF;
3195
3196
3197 if (!dp) return FR_INVALID_OBJECT;
3198
3199 /* Get logical drive number */
3200 res = find_volume(&fs, &path, 0);
3201 if (res == FR_OK) {
3202 dp->fs = fs;
3203 INIT_BUF(*dp);
3204 res = follow_path(dp, path); /* Follow the path to the directory */
3205 FREE_BUF();
3206 if (res == FR_OK) { /* Follow completed */
3207 if (dp->dir) { /* It is not the origin directory itself */
3208 if (dp->dir[DIR_Attr] & AM_DIR) /* The object is a sub directory */
3209 dp->sclust = ld_clust(fs, dp->dir);
3210 else /* The object is a file */
3211 res = FR_NO_PATH;
3212 }
3213 if (res == FR_OK) {
3214 dp->id = fs->id;
3215 res = dir_sdi(dp, 0); /* Rewind directory */
3216#if _FS_LOCK
3217 if (res == FR_OK) {
3218 if (dp->sclust) {
3219 dp->lockid = inc_lock(dp, 0); /* Lock the sub directory */
3220 if (!dp->lockid)
3221 res = FR_TOO_MANY_OPEN_FILES;
3222 } else {
3223 dp->lockid = 0; /* Root directory need not to be locked */
3224 }
3225 }
3226#endif
3227 }
3228 }
3229 if (res == FR_NO_FILE) res = FR_NO_PATH;
3230 }
3231 if (res != FR_OK) dp->fs = 0; /* Invalidate the directory object if function faild */
3232
3233 LEAVE_FF(fs, res);
3234}
3235
3236
3237
3238
3239/*-----------------------------------------------------------------------*/
3240/* Close Directory */
3241/*-----------------------------------------------------------------------*/
3242
3243FRESULT f_closedir (
3244 DIR *dp /* Pointer to the directory object to be closed */
3245)
3246{
3247 FRESULT res;
3248
3249
3250 res = validate(dp);
3251 if (res == FR_OK) {
3252#if _FS_REENTRANT
3253 FATFS *fs = dp->fs;
3254#endif
3255#if _FS_LOCK
3256 if (dp->lockid) /* Decrement sub-directory open counter */
3257 res = dec_lock(dp->lockid);
3258 if (res == FR_OK)
3259#endif
3260 dp->fs = 0; /* Invalidate directory object */
3261#if _FS_REENTRANT
3262 unlock_fs(fs, FR_OK); /* Unlock volume */
3263#endif
3264 }
3265 return res;
3266}
3267
3268
3269
3270
3271/*-----------------------------------------------------------------------*/
3272/* Read Directory Entries in Sequence */
3273/*-----------------------------------------------------------------------*/
3274
3275FRESULT f_readdir (
3276 DIR* dp, /* Pointer to the open directory object */
3277 FILINFO* fno /* Pointer to file information to return */
3278)
3279{
3280 FRESULT res;
3281 DEFINE_NAMEBUF;
3282
3283
3284 res = validate(dp); /* Check validity of the object */
3285 if (res == FR_OK) {
3286 if (!fno) {
3287 res = dir_sdi(dp, 0); /* Rewind the directory object */
3288 } else {
3289 INIT_BUF(*dp);
3290 res = dir_read(dp, 0); /* Read an item */
3291 if (res == FR_NO_FILE) { /* Reached end of directory */
3292 dp->sect = 0;
3293 res = FR_OK;
3294 }
3295 if (res == FR_OK) { /* A valid entry is found */
3296 get_fileinfo(dp, fno); /* Get the object information */
3297 res = dir_next(dp, 0); /* Increment index for next */
3298 if (res == FR_NO_FILE) {
3299 dp->sect = 0;
3300 res = FR_OK;
3301 }
3302 }
3303 FREE_BUF();
3304 }
3305 }
3306
3307 LEAVE_FF(dp->fs, res);
3308}
3309
3310
3311
3312#if _USE_FIND
3313/*-----------------------------------------------------------------------*/
3314/* Find next file */
3315/*-----------------------------------------------------------------------*/
3316
3317FRESULT f_findnext (
3318 DIR* dp, /* Pointer to the open directory object */
3319 FILINFO* fno /* Pointer to the file information structure */
3320)
3321{
3322 FRESULT res;
3323
3324
3325 for (;;) {
3326 res = f_readdir(dp, fno); /* Get a directory item */
3327 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */
3328#if _USE_LFN
3329 if (fno->lfname && pattern_matching(dp->pat, fno->lfname, 0, 0)) break; /* Test for LFN if exist */
3330#endif
3331 if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for SFN */
3332 }
3333 return res;
3334
3335}
3336
3337
3338
3339/*-----------------------------------------------------------------------*/
3340/* Find first file */
3341/*-----------------------------------------------------------------------*/
3342
3343FRESULT f_findfirst (
3344 DIR* dp, /* Pointer to the blank directory object */
3345 FILINFO* fno, /* Pointer to the file information structure */
3346 const TCHAR* path, /* Pointer to the directory to open */
3347 const TCHAR* pattern /* Pointer to the matching pattern */
3348)
3349{
3350 FRESULT res;
3351
3352
3353 dp->pat = pattern; /* Save pointer to pattern string */
3354 res = f_opendir(dp, path); /* Open the target directory */
3355 if (res == FR_OK)
3356 res = f_findnext(dp, fno); /* Find the first item */
3357 return res;
3358}
3359
3360#endif /* _USE_FIND */
3361
3362
3363
3364#if _FS_MINIMIZE == 0
3365/*-----------------------------------------------------------------------*/
3366/* Get File Status */
3367/*-----------------------------------------------------------------------*/
3368
3369FRESULT f_stat (
3370 const TCHAR* path, /* Pointer to the file path */
3371 FILINFO* fno /* Pointer to file information to return */
3372)
3373{
3374 FRESULT res;
3375 DIR dj;
3376 DEFINE_NAMEBUF;
3377
3378
3379 /* Get logical drive number */
3380 res = find_volume(&dj.fs, &path, 0);
3381 if (res == FR_OK) {
3382 INIT_BUF(dj);
3383 res = follow_path(&dj, path); /* Follow the file path */
3384 if (res == FR_OK) { /* Follow completed */
3385 if (dj.dir) { /* Found an object */
3386 if (fno) get_fileinfo(&dj, fno);
3387 } else { /* It is root directory */
3388 res = FR_INVALID_NAME;
3389 }
3390 }
3391 FREE_BUF();
3392 }
3393
3394 LEAVE_FF(dj.fs, res);
3395}
3396
3397
3398
3399#if !_FS_READONLY
3400/*-----------------------------------------------------------------------*/
3401/* Get Number of Free Clusters */
3402/*-----------------------------------------------------------------------*/
3403
3404FRESULT f_getfree (
3405 const TCHAR* path, /* Path name of the logical drive number */
3406 DWORD* nclst, /* Pointer to a variable to return number of free clusters */
3407 FATFS** fatfs /* Pointer to return pointer to corresponding file system object */
3408)
3409{
3410 FRESULT res;
3411 FATFS *fs;
3412 DWORD nfree, clst, sect, stat;
3413 UINT i;
3414 BYTE fat, *p;
3415
3416
3417 /* Get logical drive number */
3418 res = find_volume(fatfs, &path, 0);
3419 fs = *fatfs;
3420 if (res == FR_OK) {
3421 /* If free_clust is valid, return it without full cluster scan */
3422 if (fs->free_clust <= fs->n_fatent - 2) {
3423 *nclst = fs->free_clust;
3424 } else {
3425 /* Get number of free clusters */
3426 fat = fs->fs_type;
3427 nfree = 0;
3428 if (fat == FS_FAT12) { /* Sector unalighed entries: Search FAT via regular routine. */
3429 clst = 2;
3430 do {
3431 stat = get_fat(fs, clst);
3432 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
3433 if (stat == 1) { res = FR_INT_ERR; break; }
3434 if (stat == 0) nfree++;
3435 } while (++clst < fs->n_fatent);
3436 } else { /* Sector alighed entries: Accelerate the FAT search. */
3437 clst = fs->n_fatent; sect = fs->fatbase;
3438 i = 0; p = 0;
3439 do {
3440 if (!i) {
3441 res = move_window(fs, sect++);
3442 if (res != FR_OK) break;
3443 p = fs->win;
3444 i = SS(fs);
3445 }
3446 if (fat == FS_FAT16) {
3447 if (LD_WORD(p) == 0) nfree++;
3448 p += 2; i -= 2;
3449 } else {
3450 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) nfree++;
3451 p += 4; i -= 4;
3452 }
3453 } while (--clst);
3454 }
3455 fs->free_clust = nfree; /* free_clust is valid */
3456 fs->fsi_flag |= 1; /* FSInfo is to be updated */
3457 *nclst = nfree; /* Return the free clusters */
3458 }
3459 }
3460 LEAVE_FF(fs, res);
3461}
3462
3463
3464
3465
3466/*-----------------------------------------------------------------------*/
3467/* Truncate File */
3468/*-----------------------------------------------------------------------*/
3469
3470FRESULT f_truncate (
3471 FIL* fp /* Pointer to the file object */
3472)
3473{
3474 FRESULT res;
3475 DWORD ncl;
3476
3477
3478 res = validate(fp); /* Check validity of the object */
3479 if (res == FR_OK) {
3480 if (fp->err) { /* Check error */
3481 res = (FRESULT)fp->err;
3482 } else {
3483 if (!(fp->flag & FA_WRITE)) /* Check access mode */
3484 res = FR_DENIED;
3485 }
3486 }
3487 if (res == FR_OK) {
3488 if (fp->fsize > fp->fptr) {
3489 fp->fsize = fp->fptr; /* Set file size to current R/W point */
3490 fp->flag |= FA__WRITTEN;
3491 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
3492 res = remove_chain(fp->fs, fp->sclust);
3493 fp->sclust = 0;
3494 } else { /* When truncate a part of the file, remove remaining clusters */
3495 ncl = get_fat(fp->fs, fp->clust);
3496 res = FR_OK;
3497 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
3498 if (ncl == 1) res = FR_INT_ERR;
3499 if (res == FR_OK && ncl < fp->fs->n_fatent) {
3500 res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF);
3501 if (res == FR_OK) res = remove_chain(fp->fs, ncl);
3502 }
3503 }
3504#if !_FS_TINY
3505 if (res == FR_OK && (fp->flag & FA__DIRTY)) {
3506 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
3507 res = FR_DISK_ERR;
3508 else
3509 fp->flag &= ~FA__DIRTY;
3510 }
3511#endif
3512 }
3513 if (res != FR_OK) fp->err = (FRESULT)res;
3514 }
3515
3516 LEAVE_FF(fp->fs, res);
3517}
3518
3519
3520
3521
3522/*-----------------------------------------------------------------------*/
3523/* Delete a File or Directory */
3524/*-----------------------------------------------------------------------*/
3525
3526FRESULT f_unlink (
3527 const TCHAR* path /* Pointer to the file or directory path */
3528)
3529{
3530 FRESULT res;
3531 DIR dj, sdj;
3532 BYTE *dir;
3533 DWORD dclst = 0;
3534 DEFINE_NAMEBUF;
3535
3536
3537 /* Get logical drive number */
3538 res = find_volume(&dj.fs, &path, 1);
3539 if (res == FR_OK) {
3540 INIT_BUF(dj);
3541 res = follow_path(&dj, path); /* Follow the file path */
3542 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
3543 res = FR_INVALID_NAME; /* Cannot remove dot entry */
3544#if _FS_LOCK
3545 if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open object */
3546#endif
3547 if (res == FR_OK) { /* The object is accessible */
3548 dir = dj.dir;
3549 if (!dir) {
3550 res = FR_INVALID_NAME; /* Cannot remove the origin directory */
3551 } else {
3552 if (dir[DIR_Attr] & AM_RDO)
3553 res = FR_DENIED; /* Cannot remove R/O object */
3554 }
3555 if (res == FR_OK) {
3556 dclst = ld_clust(dj.fs, dir);
3557 if (dclst && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-directory ? */
3558#if _FS_RPATH
3559 if (dclst == dj.fs->cdir) { /* Is it the current directory? */
3560 res = FR_DENIED;
3561 } else
3562#endif
3563 {
3564 mem_cpy(&sdj, &dj, sizeof (DIR)); /* Open the sub-directory */
3565 sdj.sclust = dclst;
3566 res = dir_sdi(&sdj, 2);
3567 if (res == FR_OK) {
3568 res = dir_read(&sdj, 0); /* Read an item (excluding dot entries) */
3569 if (res == FR_OK) res = FR_DENIED; /* Not empty? (cannot remove) */
3570 if (res == FR_NO_FILE) res = FR_OK; /* Empty? (can remove) */
3571 }
3572 }
3573 }
3574 }
3575 if (res == FR_OK) {
3576 res = dir_remove(&dj); /* Remove the directory entry */
3577 if (res == FR_OK && dclst) /* Remove the cluster chain if exist */
3578 res = remove_chain(dj.fs, dclst);
3579 if (res == FR_OK) res = sync_fs(dj.fs);
3580 }
3581 }
3582 FREE_BUF();
3583 }
3584
3585 LEAVE_FF(dj.fs, res);
3586}
3587
3588
3589
3590
3591/*-----------------------------------------------------------------------*/
3592/* Create a Directory */
3593/*-----------------------------------------------------------------------*/
3594
3595FRESULT f_mkdir (
3596 const TCHAR* path /* Pointer to the directory path */
3597)
3598{
3599 FRESULT res;
3600 DIR dj;
3601 BYTE *dir, n;
3602 DWORD dsc, dcl, pcl, tm = GET_FATTIME();
3603 DEFINE_NAMEBUF;
3604
3605
3606 /* Get logical drive number */
3607 res = find_volume(&dj.fs, &path, 1);
3608 if (res == FR_OK) {
3609 INIT_BUF(dj);
3610 res = follow_path(&dj, path); /* Follow the file path */
3611 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */
3612 if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT))
3613 res = FR_INVALID_NAME;
3614 if (res == FR_NO_FILE) { /* Can create a new directory */
3615 dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */
3616 res = FR_OK;
3617 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */
3618 if (dcl == 1) res = FR_INT_ERR;
3619 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
3620 if (res == FR_OK) /* Flush FAT */
3621 res = sync_window(dj.fs);
3622 if (res == FR_OK) { /* Initialize the new directory table */
3623 dsc = clust2sect(dj.fs, dcl);
3624 dir = dj.fs->win;
3625 mem_set(dir, 0, SS(dj.fs));
3626 mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */
3627 dir[DIR_Name] = '.';
3628 dir[DIR_Attr] = AM_DIR;
3629 ST_DWORD(dir + DIR_CrtTime, tm);
3630 ST_DWORD(dir + DIR_WrtTime, tm);
3631 st_clust(dir, dcl);
3632 mem_cpy(dir + SZ_DIRE, dir, SZ_DIRE); /* Create ".." entry */
3633 dir[SZ_DIRE + 1] = '.'; pcl = dj.sclust;
3634 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
3635 pcl = 0;
3636 st_clust(dir + SZ_DIRE, pcl);
3637 for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */
3638 dj.fs->winsect = dsc++;
3639 dj.fs->wflag = 1;
3640 res = sync_window(dj.fs);
3641 if (res != FR_OK) break;
3642 mem_set(dir, 0, SS(dj.fs));
3643 }
3644 }
3645 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */
3646 if (res != FR_OK) {
3647 remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */
3648 } else {
3649 dir = dj.dir;
3650 dir[DIR_Attr] = AM_DIR; /* Attribute */
3651 ST_DWORD(dir + DIR_CrtTime, tm); /* Created time */
3652 ST_DWORD(dir + DIR_WrtTime, tm); /* Modified time */
3653 st_clust(dir, dcl); /* Table start cluster */
3654 dj.fs->wflag = 1;
3655 res = sync_fs(dj.fs);
3656 }
3657 }
3658 FREE_BUF();
3659 }
3660
3661 LEAVE_FF(dj.fs, res);
3662}
3663
3664
3665
3666
3667/*-----------------------------------------------------------------------*/
3668/* Change Attribute */
3669/*-----------------------------------------------------------------------*/
3670
3671FRESULT f_chmod (
3672 const TCHAR* path, /* Pointer to the file path */
3673 BYTE attr, /* Attribute bits */
3674 BYTE mask /* Attribute mask to change */
3675)
3676{
3677 FRESULT res;
3678 DIR dj;
3679 BYTE *dir;
3680 DEFINE_NAMEBUF;
3681
3682
3683 res = find_volume(&dj.fs, &path, 1); /* Get logical drive number */
3684 if (res == FR_OK) {
3685 INIT_BUF(dj);
3686 res = follow_path(&dj, path); /* Follow the file path */
3687 FREE_BUF();
3688 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
3689 res = FR_INVALID_NAME;
3690 if (res == FR_OK) {
3691 dir = dj.dir;
3692 if (!dir) { /* Is it a root directory? */
3693 res = FR_INVALID_NAME;
3694 } else { /* File or sub directory */
3695 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
3696 dir[DIR_Attr] = (attr & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
3697 dj.fs->wflag = 1;
3698 res = sync_fs(dj.fs);
3699 }
3700 }
3701 }
3702
3703 LEAVE_FF(dj.fs, res);
3704}
3705
3706
3707
3708
3709/*-----------------------------------------------------------------------*/
3710/* Rename File/Directory */
3711/*-----------------------------------------------------------------------*/
3712
3713FRESULT f_rename (
3714 const TCHAR* path_old, /* Pointer to the object to be renamed */
3715 const TCHAR* path_new /* Pointer to the new name */
3716)
3717{
3718 FRESULT res;
3719 DIR djo, djn;
3720 BYTE buf[21], *dir;
3721 DWORD dw;
3722 DEFINE_NAMEBUF;
3723
3724
3725 /* Get logical drive number of the source object */
3726 res = find_volume(&djo.fs, &path_old, 1);
3727 if (res == FR_OK) {
3728 djn.fs = djo.fs;
3729 INIT_BUF(djo);
3730 res = follow_path(&djo, path_old); /* Check old object */
3731 if (_FS_RPATH && res == FR_OK && (djo.fn[NSFLAG] & NS_DOT))
3732 res = FR_INVALID_NAME;
3733#if _FS_LOCK
3734 if (res == FR_OK) res = chk_lock(&djo, 2);
3735#endif
3736 if (res == FR_OK) { /* Old object is found */
3737 if (!djo.dir) { /* Is root dir? */
3738 res = FR_NO_FILE;
3739 } else {
3740 mem_cpy(buf, djo.dir + DIR_Attr, 21); /* Save information about object except name */
3741 mem_cpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */
3742 if (get_ldnumber(&path_new) >= 0) /* Snip drive number off and ignore it */
3743 res = follow_path(&djn, path_new); /* and make sure if new object name is not conflicting */
3744 else
3745 res = FR_INVALID_DRIVE;
3746 if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
3747 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
3748 res = dir_register(&djn); /* Register the new entry */
3749 if (res == FR_OK) {
3750/* Start of critical section where any interruption can cause a cross-link */
3751 dir = djn.dir; /* Copy information about object except name */
3752 mem_cpy(dir + 13, buf + 2, 19);
3753 dir[DIR_Attr] = buf[0] | AM_ARC;
3754 djo.fs->wflag = 1;
3755 if ((dir[DIR_Attr] & AM_DIR) && djo.sclust != djn.sclust) { /* Update .. entry in the sub-directory if needed */
3756 dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
3757 if (!dw) {
3758 res = FR_INT_ERR;
3759 } else {
3760 res = move_window(djo.fs, dw);
3761 dir = djo.fs->win + SZ_DIRE * 1; /* Ptr to .. entry */
3762 if (res == FR_OK && dir[1] == '.') {
3763 st_clust(dir, djn.sclust);
3764 djo.fs->wflag = 1;
3765 }
3766 }
3767 }
3768 if (res == FR_OK) {
3769 res = dir_remove(&djo); /* Remove old entry */
3770 if (res == FR_OK)
3771 res = sync_fs(djo.fs);
3772 }
3773/* End of critical section */
3774 }
3775 }
3776 }
3777 }
3778 FREE_BUF();
3779 }
3780
3781 LEAVE_FF(djo.fs, res);
3782}
3783
3784
3785
3786
3787/*-----------------------------------------------------------------------*/
3788/* Change Timestamp */
3789/*-----------------------------------------------------------------------*/
3790
3791FRESULT f_utime (
3792 const TCHAR* path, /* Pointer to the file/directory name */
3793 const FILINFO* fno /* Pointer to the time stamp to be set */
3794)
3795{
3796 FRESULT res;
3797 DIR dj;
3798 BYTE *dir;
3799 DEFINE_NAMEBUF;
3800
3801
3802 /* Get logical drive number */
3803 res = find_volume(&dj.fs, &path, 1);
3804 if (res == FR_OK) {
3805 INIT_BUF(dj);
3806 res = follow_path(&dj, path); /* Follow the file path */
3807 FREE_BUF();
3808 if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
3809 res = FR_INVALID_NAME;
3810 if (res == FR_OK) {
3811 dir = dj.dir;
3812 if (!dir) { /* Root directory */
3813 res = FR_INVALID_NAME;
3814 } else { /* File or sub-directory */
3815 ST_WORD(dir + DIR_WrtTime, fno->ftime);
3816 ST_WORD(dir + DIR_WrtDate, fno->fdate);
3817 dj.fs->wflag = 1;
3818 res = sync_fs(dj.fs);
3819 }
3820 }
3821 }
3822
3823 LEAVE_FF(dj.fs, res);
3824}
3825
3826#endif /* !_FS_READONLY */
3827#endif /* _FS_MINIMIZE == 0 */
3828#endif /* _FS_MINIMIZE <= 1 */
3829#endif /* _FS_MINIMIZE <= 2 */
3830
3831
3832
3833
3834#if _USE_LABEL
3835/*-----------------------------------------------------------------------*/
3836/* Get volume label */
3837/*-----------------------------------------------------------------------*/
3838
3839FRESULT f_getlabel (
3840 const TCHAR* path, /* Path name of the logical drive number */
3841 TCHAR* label, /* Pointer to a buffer to return the volume label */
3842 DWORD* vsn /* Pointer to a variable to return the volume serial number */
3843)
3844{
3845 FRESULT res;
3846 DIR dj;
3847 UINT i, j;
3848#if _USE_LFN && _LFN_UNICODE
3849 WCHAR w;
3850#endif
3851
3852
3853 /* Get logical drive number */
3854 res = find_volume(&dj.fs, &path, 0);
3855
3856 /* Get volume label */
3857 if (res == FR_OK && label) {
3858 dj.sclust = 0; /* Open root directory */
3859 res = dir_sdi(&dj, 0);
3860 if (res == FR_OK) {
3861 res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
3862 if (res == FR_OK) { /* A volume label is exist */
3863#if _USE_LFN && _LFN_UNICODE
3864 i = j = 0;
3865 do {
3866 w = (i < 11) ? dj.dir[i++] : ' ';
3867 if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i]))
3868 w = w << 8 | dj.dir[i++];
3869 label[j++] = ff_convert(w, 1); /* OEM -> Unicode */
3870 } while (j < 11);
3871#else
3872 mem_cpy(label, dj.dir, 11);
3873#endif
3874 j = 11;
3875 do {
3876 label[j] = 0;
3877 if (!j) break;
3878 } while (label[--j] == ' ');
3879 }
3880 if (res == FR_NO_FILE) { /* No label, return nul string */
3881 label[0] = 0;
3882 res = FR_OK;
3883 }
3884 }
3885 }
3886
3887 /* Get volume serial number */
3888 if (res == FR_OK && vsn) {
3889 res = move_window(dj.fs, dj.fs->volbase);
3890 if (res == FR_OK) {
3891 i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID;
3892 *vsn = LD_DWORD(&dj.fs->win[i]);
3893 }
3894 }
3895
3896 LEAVE_FF(dj.fs, res);
3897}
3898
3899
3900
3901#if !_FS_READONLY
3902/*-----------------------------------------------------------------------*/
3903/* Set volume label */
3904/*-----------------------------------------------------------------------*/
3905
3906FRESULT f_setlabel (
3907 const TCHAR* label /* Pointer to the volume label to set */
3908)
3909{
3910 FRESULT res;
3911 DIR dj;
3912 BYTE vn[11];
3913 UINT i, j, sl;
3914 WCHAR w;
3915 DWORD tm;
3916
3917
3918 /* Get logical drive number */
3919 res = find_volume(&dj.fs, &label, 1);
3920 if (res) LEAVE_FF(dj.fs, res);
3921
3922 /* Create a volume label in directory form */
3923 vn[0] = 0;
3924 for (sl = 0; label[sl]; sl++) ; /* Get name length */
3925 for ( ; sl && label[sl - 1] == ' '; sl--) ; /* Remove trailing spaces */
3926 if (sl) { /* Create volume label in directory form */
3927 i = j = 0;
3928 do {
3929#if _USE_LFN && _LFN_UNICODE
3930 w = ff_convert(ff_wtoupper(label[i++]), 0);
3931#else
3932 w = (BYTE)label[i++];
3933 if (IsDBCS1(w))
3934 w = (j < 10 && i < sl && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;
3935#if _USE_LFN
3936 w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0);
3937#else
3938 if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */
3939#ifdef _EXCVT
3940 if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */
3941#else
3942 if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */
3943#endif
3944#endif
3945#endif
3946 if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid characters for volume label */
3947 LEAVE_FF(dj.fs, FR_INVALID_NAME);
3948 if (w >= 0x100) vn[j++] = (BYTE)(w >> 8);
3949 vn[j++] = (BYTE)w;
3950 } while (i < sl);
3951 while (j < 11) vn[j++] = ' '; /* Fill remaining name field */
3952 if (vn[0] == DDEM) LEAVE_FF(dj.fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */
3953 }
3954
3955 /* Set volume label */
3956 dj.sclust = 0; /* Open root directory */
3957 res = dir_sdi(&dj, 0);
3958 if (res == FR_OK) {
3959 res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
3960 if (res == FR_OK) { /* A volume label is found */
3961 if (vn[0]) {
3962 mem_cpy(dj.dir, vn, 11); /* Change the volume label name */
3963 tm = GET_FATTIME();
3964 ST_DWORD(dj.dir + DIR_CrtTime, tm);
3965 ST_DWORD(dj.dir + DIR_WrtTime, tm);
3966 } else {
3967 dj.dir[0] = DDEM; /* Remove the volume label */
3968 }
3969 dj.fs->wflag = 1;
3970 res = sync_fs(dj.fs);
3971 } else { /* No volume label is found or error */
3972 if (res == FR_NO_FILE) {
3973 res = FR_OK;
3974 if (vn[0]) { /* Create volume label as new */
3975 res = dir_alloc(&dj, 1); /* Allocate an entry for volume label */
3976 if (res == FR_OK) {
3977 mem_set(dj.dir, 0, SZ_DIRE); /* Set volume label */
3978 mem_cpy(dj.dir, vn, 11);
3979 dj.dir[DIR_Attr] = AM_VOL;
3980 tm = GET_FATTIME();
3981 ST_DWORD(dj.dir + DIR_CrtTime, tm);
3982 ST_DWORD(dj.dir + DIR_WrtTime, tm);
3983 dj.fs->wflag = 1;
3984 res = sync_fs(dj.fs);
3985 }
3986 }
3987 }
3988 }
3989 }
3990
3991 LEAVE_FF(dj.fs, res);
3992}
3993
3994#endif /* !_FS_READONLY */
3995#endif /* _USE_LABEL */
3996
3997
3998
3999/*-----------------------------------------------------------------------*/
4000/* Forward data to the stream directly (available on only tiny cfg) */
4001/*-----------------------------------------------------------------------*/
4002#if _USE_FORWARD && _FS_TINY
4003
4004FRESULT f_forward (
4005 FIL* fp, /* Pointer to the file object */
4006 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
4007 UINT btf, /* Number of bytes to forward */
4008 UINT* bf /* Pointer to number of bytes forwarded */
4009)
4010{
4011 FRESULT res;
4012 DWORD remain, clst, sect;
4013 UINT rcnt;
4014 BYTE csect;
4015
4016
4017 *bf = 0; /* Clear transfer byte counter */
4018
4019 res = validate(fp); /* Check validity of the object */
4020 if (res != FR_OK) LEAVE_FF(fp->fs, res);
4021 if (fp->err) /* Check error */
4022 LEAVE_FF(fp->fs, (FRESULT)fp->err);
4023 if (!(fp->flag & FA_READ)) /* Check access mode */
4024 LEAVE_FF(fp->fs, FR_DENIED);
4025
4026 remain = fp->fsize - fp->fptr;
4027 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
4028
4029 for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */
4030 fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
4031 csect = (