source: azure_iot_hub/trunk/ntshell/fatfs/ff.c@ 388

Last change on this file since 388 was 388, checked in by coas-nagasima, 5 years ago

Azure IoT Hub Device C SDK を使ったサンプルの追加
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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 "shellif.h"
20#include "ff.h" /* Declarations of FatFs API */
21#include "diskio.h" /* Declarations of disk I/O functions */
22#include <stdio.h>
23
24/*--------------------------------------------------------------------------
25
26 Module Private Definitions
27
28---------------------------------------------------------------------------*/
29
30#if _FATFS != 64180 /* Revision ID */
31#error Wrong include file (ff.h).
32#endif
33
34
35/* Reentrancy related */
36#if FF_FS_REENTRANT
37#if FF_USE_LFN == 1
38#error Static LFN work area cannot be used at thread-safe configuration
39#endif
40#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
41#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
42#else
43#define ENTER_FF(fs)
44#define LEAVE_FF(fs, res) return res
45#endif
46
47#define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
48
49
50/* Definitions of sector size */
51#if (FF_MAX_SS < FF_MIN_SS) || (FF_MAX_SS != 512 && FF_MAX_SS != 1024 && FF_MAX_SS != 2048 && FF_MAX_SS != 4096) || (FF_MIN_SS != 512 && FF_MIN_SS != 1024 && FF_MIN_SS != 2048 && FF_MIN_SS != 4096)
52#error Wrong sector size configuration
53#endif
54#if FF_MAX_SS == FF_MIN_SS
55#define SS(fs) ((UINT)FF_MAX_SS) /* Fixed sector size */
56#else
57#define SS(fs) ((fs)->ssize) /* Variable sector size */
58#endif
59
60
61/* Timestamp feature */
62#if FF_FS_NORTC == 1
63#if FF_NORTC_YEAR < 1980 || FF_NORTC_YEAR > 2107 || FF_NORTC_MON < 1 || FF_NORTC_MON > 12 || FF_NORTC_MDAY < 1 || FF_NORTC_MDAY > 31
64#error Invalid FF_FS_NORTC settings
65#endif
66#define GET_FATTIME() ((DWORD)(FF_NORTC_YEAR - 1980) << 25 | (DWORD)FF_NORTC_MON << 21 | (DWORD)FF_NORTC_MDAY << 16)
67#else
68#define GET_FATTIME() get_fattime()
69#endif
70
71
72/* File access control feature */
73#if FF_FS_LOCK != 0
74#if FF_FS_READONLY
75#error FF_FS_LOCK must be 0 at read-only configuration
76#endif
77typedef struct {
78 FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */
79 DWORD clu; /* Object ID 2, directory (0:root) */
80 WORD idx; /* Object ID 3, directory index */
81 WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
82} FILESEM;
83#endif
84
85
86
87/* DBCS code ranges and SBCS upper conversion tables */
88
89#if FF_CODE_PAGE == 932 /* Japanese Shift-JIS */
90#define _DF1S 0x81 /* DBC 1st byte range 1 start */
91#define _DF1E 0x9F /* DBC 1st byte range 1 end */
92#define _DF2S 0xE0 /* DBC 1st byte range 2 start */
93#define _DF2E 0xFC /* DBC 1st byte range 2 end */
94#define _DS1S 0x40 /* DBC 2nd byte range 1 start */
95#define _DS1E 0x7E /* DBC 2nd byte range 1 end */
96#define _DS2S 0x80 /* DBC 2nd byte range 2 start */
97#define _DS2E 0xFC /* DBC 2nd byte range 2 end */
98
99#elif FF_CODE_PAGE == 936 /* Simplified Chinese GBK */
100#define _DF1S 0x81
101#define _DF1E 0xFE
102#define _DS1S 0x40
103#define _DS1E 0x7E
104#define _DS2S 0x80
105#define _DS2E 0xFE
106
107#elif FF_CODE_PAGE == 949 /* Korean */
108#define _DF1S 0x81
109#define _DF1E 0xFE
110#define _DS1S 0x41
111#define _DS1E 0x5A
112#define _DS2S 0x61
113#define _DS2E 0x7A
114#define _DS3S 0x81
115#define _DS3E 0xFE
116
117#elif FF_CODE_PAGE == 950 /* Traditional Chinese Big5 */
118#define _DF1S 0x81
119#define _DF1E 0xFE
120#define _DS1S 0x40
121#define _DS1E 0x7E
122#define _DS2S 0xA1
123#define _DS2E 0xFE
124
125#elif FF_CODE_PAGE == 437 /* U.S. */
126#define _DF1S 0
127#define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
128 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
129 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
130 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
131 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
132 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
133 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
134 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
135
136#elif FF_CODE_PAGE == 720 /* Arabic */
137#define _DF1S 0
138#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
139 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
140 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
141 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
142 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
143 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
144 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
145 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
146
147#elif FF_CODE_PAGE == 737 /* Greek */
148#define _DF1S 0
149#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
150 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
151 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \
152 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
153 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
154 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
155 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
156 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
157
158#elif FF_CODE_PAGE == 771 /* KBL */
159#define _DF1S 0
160#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
161 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
162 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
163 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
164 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
165 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \
166 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
167 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
168
169#elif FF_CODE_PAGE == 775 /* Baltic */
170#define _DF1S 0
171#define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \
172 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
173 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
174 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
175 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
176 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
177 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \
178 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
179
180#elif FF_CODE_PAGE == 850 /* Latin 1 */
181#define _DF1S 0
182#define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
183 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
184 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
185 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
186 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
187 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
188 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
189 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
190
191#elif FF_CODE_PAGE == 852 /* Latin 2 */
192#define _DF1S 0
193#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \
194 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \
195 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \
196 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
197 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
198 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
199 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \
200 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
201
202#elif FF_CODE_PAGE == 855 /* Cyrillic */
203#define _DF1S 0
204#define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \
205 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
206 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \
207 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
208 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
209 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
210 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \
211 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
212
213#elif FF_CODE_PAGE == 857 /* Turkish */
214#define _DF1S 0
215#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \
216 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
217 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
218 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
219 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
220 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
221 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
222 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
223
224#elif FF_CODE_PAGE == 860 /* Portuguese */
225#define _DF1S 0
226#define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
227 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
228 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
229 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
230 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
231 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
232 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
233 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
234
235#elif FF_CODE_PAGE == 861 /* Icelandic */
236#define _DF1S 0
237#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
238 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
239 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
240 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
241 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
242 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
243 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
244 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
245
246#elif FF_CODE_PAGE == 862 /* Hebrew */
247#define _DF1S 0
248#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
249 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
250 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
251 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
252 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
253 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
254 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
255 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
256
257#elif FF_CODE_PAGE == 863 /* Canadian-French */
258#define _DF1S 0
259#define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
260 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
261 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
262 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
263 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
264 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
265 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
266 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
267
268#elif FF_CODE_PAGE == 864 /* Arabic */
269#define _DF1S 0
270#define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
271 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
272 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
273 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
274 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
275 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
276 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
277 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
278
279#elif FF_CODE_PAGE == 865 /* Nordic */
280#define _DF1S 0
281#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
282 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
283 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
284 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
285 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
286 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
287 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
288 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
289
290#elif FF_CODE_PAGE == 866 /* Russian */
291#define _DF1S 0
292#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
293 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
294 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
295 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
296 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
297 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
298 0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
299 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
300
301#elif FF_CODE_PAGE == 869 /* Greek 2 */
302#define _DF1S 0
303#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
304 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \
305 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
306 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
307 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
308 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
309 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
310 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
311
312#elif FF_CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
313#if FF_USE_LFN
314#error Cannot use LFN feature without valid code page.
315#endif
316#define _DF1S 0
317
318#elif FF_CODE_PAGE == 65001 /* UTF-8 */
319#if FF_LFN_UNICODE
320#error Cannot use LFN_UNICODE feature without valid code page.
321#endif
322#define _DF1S 0
323
324void Utf16_to_Utf8(unsigned char *ret_code, int *ret_size, UINT chr)
325{
326 ret_code[0] = ret_code[1] = ret_code[2] = ret_code[3] = 0;
327
328 if (chr <= 0x7f) { // ASCII互換
329 ret_code[0] = chr;
330 *ret_size = 1;
331 return;
332 }
333
334 if (chr <= 0x7ff) {
335 ret_code[1] = (0x80 | (chr & 0x3f));
336 ret_code[0] = (0xc0 | (chr >> 6));
337 *ret_size = 2;
338 return;
339 }
340
341 if (chr <= 0xffff) {
342 ret_code[2] = (0x80 | (chr & 0x3f));
343 ret_code[1] = (0x80 | ((chr >> 6) & 0x3f));
344 ret_code[0] = (0xe0 | ((chr >> 12) & 0x0f));
345 *ret_size = 3;
346 return;
347 }
348
349 if (chr <= 0x1fffff) {
350 ret_code[3] = (0x80 | (chr & 0x3f));
351 ret_code[2] = (0x80 | ((chr >> 6) & 0x3f));
352 ret_code[1] = (0x80 | ((chr >> 12) & 0x3f));
353 ret_code[0] = (0xf0 | ((chr >> 18) & 0x07));
354 *ret_size = 4;
355 return;
356 }
357
358 if (chr <= 0x3ffffff) {
359 ret_code[4] = (0x80 | (chr & 0x3f));
360 ret_code[3] = (0x80 | ((chr >> 6) & 0x3f));
361 ret_code[2] = (0x80 | ((chr >> 12) & 0x3f));
362 ret_code[1] = (0x80 | ((chr >> 18) & 0x3f));
363 ret_code[0] = (0xf8 | ((chr >> 24) & 0x03));
364 *ret_size = 5;
365 return;
366 }
367
368 ret_code[5] = (0x80 | (chr & 0x3f));
369 ret_code[4] = (0x80 | ((chr >> 6) & 0x3f));
370 ret_code[3] = (0x80 | ((chr >> 12) & 0x3f));
371 ret_code[2] = (0x80 | ((chr >> 18) & 0x3f));
372 ret_code[1] = (0x80 | ((chr >> 24) & 0x3f));
373 ret_code[0] = (0xfc | ((chr >> 30) & 0x01));
374 *ret_size = 6;
375 return;
376}
377
378//2バイトのUTF-16コードが得られる
379WCHAR Utf8_to_Utf16(const char *src, int *code_size)
380{
381 int i;
382 unsigned int uc = 0;
383 unsigned char len = 0;
384
385 len = 0;
386 if ((src[0] & 0x80) == 0) { uc = src[0] & 0x7F; len = 0; }
387 else if ((src[0] & 0xE0) == 0xC0) { uc = src[0] & 0x1F; len = 1; }
388 else if ((src[0] & 0xF0) == 0xE0) { uc = src[0] & 0x0F; len = 2; }
389 else if ((src[0] & 0xF8) == 0xF0) { uc = src[0] & 0x07; len = 3; }
390 else if ((src[0] & 0xFC) == 0xF8) { uc = src[0] & 0x03; len = 4; }
391 else if ((src[0] & 0xFE) == 0xFC) { uc = src[0] & 0x01; len = 5; }
392
393 i = 1;
394 while ((i <= len) && ((src[i] & 0xC0) == 0x80)) {
395 uc = (uc << 6) | (src[i] & 0x3F);
396 i++;
397 }
398
399 //消費文字数設定
400 *code_size = i;
401
402 //現状、2バイト限定
403 return uc;
404}
405
406#else
407#error Unknown code page
408
409#endif
410
411
412/* Character code support macros */
413#define IsUpper(c) (((c)>='A')&&((c)<='Z'))
414#define IsLower(c) (((c)>='a')&&((c)<='z'))
415#define IsDigit(c) (((c)>='0')&&((c)<='9'))
416
417#if _DF1S /* Code page is DBCS */
418
419#ifdef _DF2S /* Two 1st byte areas */
420#define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
421#else /* One 1st byte area */
422#define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
423#endif
424
425#ifdef _DS3S /* Three 2nd byte areas */
426#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
427#else /* Two 2nd byte areas */
428#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
429#endif
430
431#else /* Code page is SBCS */
432
433#define IsDBCS1(c) 0
434#define IsDBCS2(c) 0
435
436#endif /* _DF1S */
437
438
439/* Name status flags */
440#define NSFLAG 11 /* Index of name status byte in fn[] */
441#define NS_LOSS 0x01 /* Out of 8.3 format */
442#define NS_LFN 0x02 /* Force to create LFN entry */
443#define NS_LAST 0x04 /* Last segment */
444#define NS_BODY 0x08 /* Lower case flag (body) */
445#define NS_EXT 0x10 /* Lower case flag (ext) */
446#define NS_DOT 0x20 /* Dot entry */
447
448
449/* FAT sub-type boundaries (Differ from specs but correct for real DOS/Windows) */
450#define MIN_FAT16 4086U /* Minimum number of clusters of FAT16 */
451#define MIN_FAT32 65526U /* Minimum number of clusters of FAT32 */
452
453
454/* FatFs refers the members in the FAT structures as byte array instead of
455/ structure members because the structure is not binary compatible between
456/ different platforms */
457
458#define BS_jmpBoot 0 /* x86 jump instruction (3) */
459#define BS_OEMName 3 /* OEM name (8) */
460#define BPB_BytsPerSec 11 /* Sector size [byte] (2) */
461#define BPB_SecPerClus 13 /* Cluster size [sector] (1) */
462#define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */
463#define BPB_NumFATs 16 /* Number of FAT copies (1) */
464#define BPB_RootEntCnt 17 /* Number of root directory entries for FAT12/16 (2) */
465#define BPB_TotSec16 19 /* Volume size [sector] (2) */
466#define BPB_Media 21 /* Media descriptor (1) */
467#define BPB_FATSz16 22 /* FAT size [sector] (2) */
468#define BPB_SecPerTrk 24 /* Track size [sector] (2) */
469#define BPB_NumHeads 26 /* Number of heads (2) */
470#define BPB_HiddSec 28 /* Number of special hidden sectors (4) */
471#define BPB_TotSec32 32 /* Volume size [sector] (4) */
472#define BS_DrvNum 36 /* Physical drive number (1) */
473#define BS_NTres 37 /* Error flag (1) */
474#define BS_BootSig 38 /* Extended boot signature (1) */
475#define BS_VolID 39 /* Volume serial number (4) */
476#define BS_VolLab 43 /* Volume label (8) */
477#define BS_FilSysType 54 /* File system type (1) */
478#define BPB_FATSz32 36 /* FAT size [sector] (4) */
479#define BPB_ExtFlags 40 /* Extended flags (2) */
480#define BPB_FSVer 42 /* File system version (2) */
481#define BPB_RootClus 44 /* Root directory first cluster (4) */
482#define BPB_FSInfo 48 /* Offset of FSINFO sector (2) */
483#define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */
484#define BS_DrvNum32 64 /* Physical drive number (1) */
485#define BS_NTres32 65 /* Error flag (1) */
486#define BS_BootSig32 66 /* Extended boot signature (1) */
487#define BS_VolID32 67 /* Volume serial number (4) */
488#define BS_VolLab32 71 /* Volume label (8) */
489#define BS_FilSysType32 82 /* File system type (1) */
490#define FSI_LeadSig 0 /* FSI: Leading signature (4) */
491#define FSI_StrucSig 484 /* FSI: Structure signature (4) */
492#define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */
493#define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */
494#define MBR_Table 446 /* MBR: Partition table offset (2) */
495#define SZ_PTE 16 /* MBR: Size of a partition table entry */
496#define BS_55AA 510 /* Signature word (2) */
497
498#define DIR_Name 0 /* Short file name (11) */
499#define DIR_Attr 11 /* Attribute (1) */
500#define DIR_NTres 12 /* Lower case flag (1) */
501#define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */
502#define DIR_CrtTime 14 /* Created time (2) */
503#define DIR_CrtDate 16 /* Created date (2) */
504#define DIR_LstAccDate 18 /* Last accessed date (2) */
505#define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */
506#define DIR_WrtTime 22 /* Modified time (2) */
507#define DIR_WrtDate 24 /* Modified date (2) */
508#define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */
509#define DIR_FileSize 28 /* File size (4) */
510#define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */
511#define LDIR_Attr 11 /* LFN attribute (1) */
512#define LDIR_Type 12 /* LFN type (1) */
513#define LDIR_Chksum 13 /* Checksum of corresponding SFN entry */
514#define LDIR_FstClusLO 26 /* Must be zero (0) */
515#define SZ_DIRE 32 /* Size of a directory entry */
516#define LLEF 0x40 /* Last long entry flag in LDIR_Ord */
517#define DDEM 0xE5 /* Deleted directory entry mark at DIR_Name[0] */
518#define RDDEM 0x05 /* Replacement of the character collides with DDEM */
519
520
521
522
523/*--------------------------------------------------------------------------
524
525 Module Private Work Area
526
527---------------------------------------------------------------------------*/
528
529/* Remark: Uninitialized variables with static duration are guaranteed
530/ zero/null at start-up. If not, either the linker or start-up routine
531/ being used is not compliance with ANSI-C standard.
532*/
533
534#if FF_VOLUMES < 1 || FF_VOLUMES > 9
535#error Wrong FF_VOLUMES setting
536#endif
537static FATFS *FatFs[FF_VOLUMES]; /* Pointer to the file system objects (logical drives) */
538static WORD Fsid; /* File system mount ID */
539
540#if FF_FS_RPATH && FF_VOLUMES >= 2
541static BYTE CurrVol; /* Current drive */
542#endif
543
544#if FF_FS_LOCK != 0
545static FILESEM Files[FF_FS_LOCK]; /* Open object lock semaphores */
546#endif
547
548#if FF_USE_LFN == 0 /* Non LFN feature */
549#define DEFINE_NAMEBUF BYTE sfn[12]
550#define INIT_BUF(dobj) (dobj).fn = sfn
551#define FREE_BUF()
552#else
553#if FF_MAX_LFN < 12 || FF_MAX_LFN > 255
554#error Wrong FF_MAX_LFN setting
555#endif
556#if FF_USE_LFN == 1 /* LFN feature with static working buffer */
557static WCHAR LfnBuf[FF_MAX_LFN + 1];
558#define DEFINE_NAMEBUF BYTE sfn[12]
559#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
560#define FREE_BUF()
561#elif FF_USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */
562#define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR lbuf[FF_MAX_LFN + 1]
563#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; }
564#define FREE_BUF()
565#elif FF_USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */
566#define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR *lfn
567#define INIT_BUF(dobj) { lfn = ff_memalloc((FF_MAX_LFN + 1) * 2); if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); (dobj).lfn = lfn; (dobj).fn = sfn; }
568#define FREE_BUF() ff_memfree(lfn)
569#else
570#error Wrong FF_USE_LFN setting
571#endif
572#endif
573
574#ifdef _EXCVT
575static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for SBCS extended characters */
576#endif
577
578
579
580
581
582
583/*--------------------------------------------------------------------------
584
585 Module Private Functions
586
587---------------------------------------------------------------------------*/
588
589
590/*-----------------------------------------------------------------------*/
591/* String functions */
592/*-----------------------------------------------------------------------*/
593
594/* Copy memory to memory */
595static
596void mem_cpy (void* dst, const void* src, UINT cnt) {
597 BYTE *d = (BYTE*)dst;
598 const BYTE *s = (const BYTE*)src;
599
600#if FF_WORD_ACCESS == 1
601 while (cnt >= sizeof (int)) {
602 *(int*)d = *(int*)s;
603 d += sizeof (int); s += sizeof (int);
604 cnt -= sizeof (int);
605 }
606#endif
607 while (cnt--)
608 *d++ = *s++;
609}
610
611/* Fill memory */
612static
613void mem_set (void* dst, int val, UINT cnt) {
614 BYTE *d = (BYTE*)dst;
615
616 while (cnt--)
617 *d++ = (BYTE)val;
618}
619
620/* Compare memory to memory */
621static
622int mem_cmp (const void* dst, const void* src, UINT cnt) {
623 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
624 int r = 0;
625
626 while (cnt-- && (r = *d++ - *s++) == 0) ;
627 return r;
628}
629
630/* Check if chr is contained in the string */
631static
632int chk_chr (const char* str, int chr) {
633 while (*str && *str != chr) str++;
634 return *str;
635}
636
637
638
639
640/*-----------------------------------------------------------------------*/
641/* Request/Release grant to access the volume */
642/*-----------------------------------------------------------------------*/
643#if FF_FS_REENTRANT
644static
645int lock_fs (
646 FATFS* fs /* File system object */
647)
648{
649 return ff_req_grant(fs->sobj);
650}
651
652
653static
654void unlock_fs (
655 FATFS* fs, /* File system object */
656 FRESULT res /* Result code to be returned */
657)
658{
659 if (fs &&
660 res != FR_NOT_ENABLED &&
661 res != FR_INVALID_DRIVE &&
662 res != FR_INVALID_OBJECT &&
663 res != FR_TIMEOUT) {
664 ff_rel_grant(fs->sobj);
665 }
666}
667#endif
668
669
670
671
672/*-----------------------------------------------------------------------*/
673/* File lock control functions */
674/*-----------------------------------------------------------------------*/
675#if FF_FS_LOCK != 0
676
677static
678FRESULT chk_lock ( /* Check if the file can be accessed */
679 FATFS_DIR* dp, /* Directory object pointing the file to be checked */
680 int acc /* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */
681)
682{
683 UINT i, be;
684
685 /* Search file semaphore table */
686 for (i = be = 0; i < FF_FS_LOCK; i++) {
687 if (Files[i].fs) { /* Existing entry */
688 if (Files[i].fs == dp->fs && /* Check if the object matched with an open object */
689 Files[i].clu == dp->sclust &&
690 Files[i].idx == dp->index) break;
691 } else { /* Blank entry */
692 be = 1;
693 }
694 }
695 if (i == FF_FS_LOCK) /* The object is not opened */
696 return (be || acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */
697
698 /* The object has been opened. Reject any open against writing file and all write mode open */
699 return (acc || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
700}
701
702
703static
704int enq_lock (void) /* Check if an entry is available for a new object */
705{
706 UINT i;
707
708 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ;
709 return (i == FF_FS_LOCK) ? 0 : 1;
710}
711
712
713static
714UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */
715 FATFS_DIR* dp, /* Directory object pointing the file to register or increment */
716 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
717)
718{
719 UINT i;
720
721
722 for (i = 0; i < FF_FS_LOCK; i++) { /* Find the object */
723 if (Files[i].fs == dp->fs &&
724 Files[i].clu == dp->sclust &&
725 Files[i].idx == dp->index) break;
726 }
727
728 if (i == FF_FS_LOCK) { /* Not opened. Register it as new. */
729 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ;
730 if (i == FF_FS_LOCK) return 0; /* No free entry to register (int err) */
731 Files[i].fs = dp->fs;
732 Files[i].clu = dp->sclust;
733 Files[i].idx = dp->index;
734 Files[i].ctr = 0;
735 }
736
737 if (acc && Files[i].ctr) return 0; /* Access violation (int err) */
738
739 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
740
741 return i + 1;
742}
743
744
745static
746FRESULT dec_lock ( /* Decrement object open counter */
747 UINT i /* Semaphore index (1..) */
748)
749{
750 WORD n;
751 FRESULT res;
752
753
754 if (--i < FF_FS_LOCK) { /* Shift index number origin from 0 */
755 n = Files[i].ctr;
756 if (n == 0x100) n = 0; /* If write mode open, delete the entry */
757 if (n) n--; /* Decrement read mode open count */
758 Files[i].ctr = n;
759 if (!n) Files[i].fs = 0; /* Delete the entry if open count gets zero */
760 res = FR_OK;
761 } else {
762 res = FR_INT_ERR; /* Invalid index nunber */
763 }
764 return res;
765}
766
767
768static
769void clear_lock ( /* Clear lock entries of the volume */
770 FATFS *fs
771)
772{
773 UINT i;
774
775 for (i = 0; i < FF_FS_LOCK; i++) {
776 if (Files[i].fs == fs) Files[i].fs = 0;
777 }
778}
779#endif
780
781
782
783
784/*-----------------------------------------------------------------------*/
785/* Move/Flush disk access window in the file system object */
786/*-----------------------------------------------------------------------*/
787#if !FF_FS_READONLY
788static
789FRESULT sync_window ( /* FR_OK:succeeded, !=0:error */
790 FATFS* fs /* File system object */
791)
792{
793 DWORD wsect;
794 UINT nf;
795 FRESULT res = FR_OK;
796
797
798 if (fs->wflag) { /* Write back the sector if it is dirty */
799 wsect = fs->winsect; /* Current sector number */
800 if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) {
801 res = FR_DISK_ERR;
802 } else {
803 fs->wflag = 0;
804 if (wsect - fs->fatbase < fs->fsize) { /* Is it in the FAT area? */
805 for (nf = fs->n_fats; nf >= 2; nf--) { /* Reflect the change to all FAT copies */
806 wsect += fs->fsize;
807 disk_write(fs->drv, fs->win, wsect, 1);
808 }
809 }
810 }
811 }
812 return res;
813}
814#endif
815
816
817static
818FRESULT move_window ( /* FR_OK(0):succeeded, !=0:error */
819 FATFS* fs, /* File system object */
820 DWORD sector /* Sector number to make appearance in the fs->win[] */
821)
822{
823 FRESULT res = FR_OK;
824
825
826 if (sector != fs->winsect) { /* Window offset changed? */
827#if !FF_FS_READONLY
828 res = sync_window(fs); /* Write-back changes */
829#endif
830 if (res == FR_OK) { /* Fill sector window with new data */
831 if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) {
832 sector = 0xFFFFFFFF; /* Invalidate window if data is not reliable */
833 res = FR_DISK_ERR;
834 }
835 fs->winsect = sector;
836 }
837 }
838 return res;
839}
840
841
842
843
844/*-----------------------------------------------------------------------*/
845/* Synchronize file system and strage device */
846/*-----------------------------------------------------------------------*/
847#if !FF_FS_READONLY
848static
849FRESULT sync_fs ( /* FR_OK:succeeded, !=0:error */
850 FATFS* fs /* File system object */
851)
852{
853 FRESULT res;
854
855
856 res = sync_window(fs);
857 if (res == FR_OK) {
858 /* Update FSInfo sector if needed */
859 if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) {
860 /* Create FSInfo structure */
861 mem_set(fs->win, 0, SS(fs));
862 ST_WORD(fs->win + BS_55AA, 0xAA55);
863 ST_DWORD(fs->win + FSI_LeadSig, 0x41615252);
864 ST_DWORD(fs->win + FSI_StrucSig, 0x61417272);
865 ST_DWORD(fs->win + FSI_Free_Count, fs->free_clust);
866 ST_DWORD(fs->win + FSI_Nxt_Free, fs->last_clust);
867 /* Write it into the FSInfo sector */
868 fs->winsect = fs->volbase + 1;
869 disk_write(fs->drv, fs->win, fs->winsect, 1);
870 fs->fsi_flag = 0;
871 }
872 /* Make sure that no pending write process in the physical drive */
873 if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
874 res = FR_DISK_ERR;
875 }
876
877 return res;
878}
879#endif
880
881
882
883
884/*-----------------------------------------------------------------------*/
885/* Get sector# from cluster# */
886/*-----------------------------------------------------------------------*/
887/* Hidden API for hacks and disk tools */
888
889DWORD clust2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */
890 FATFS* fs, /* File system object */
891 DWORD clst /* Cluster# to be converted */
892)
893{
894 clst -= 2;
895 if (clst >= fs->n_fatent - 2) return 0; /* Invalid cluster# */
896 return clst * fs->csize + fs->database;
897}
898
899
900
901
902/*-----------------------------------------------------------------------*/
903/* FAT access - Read value of a FAT entry */
904/*-----------------------------------------------------------------------*/
905/* Hidden API for hacks and disk tools */
906
907DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x0FFFFFFF:Cluster status */
908 FATFS* fs, /* File system object */
909 DWORD clst /* FAT index number (cluster number) to get the value */
910)
911{
912 UINT wc, bc;
913 BYTE *p;
914 DWORD val;
915
916
917 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
918 val = 1; /* Internal error */
919
920 } else {
921 val = 0xFFFFFFFF; /* Default value falls on disk error */
922
923 switch (fs->fs_type) {
924 case FS_FAT12 :
925 bc = (UINT)clst; bc += bc / 2;
926 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
927 wc = fs->win[bc++ % SS(fs)];
928 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
929 wc |= fs->win[bc % SS(fs)] << 8;
930 val = clst & 1 ? wc >> 4 : (wc & 0xFFF);
931 break;
932
933 case FS_FAT16 :
934 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
935 p = &fs->win[clst * 2 % SS(fs)];
936 val = LD_WORD(p);
937 break;
938
939 case FS_FAT32 :
940 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
941 p = &fs->win[clst * 4 % SS(fs)];
942 val = LD_DWORD(p) & 0x0FFFFFFF;
943 break;
944
945 default:
946 val = 1; /* Internal error */
947 }
948 }
949
950 return val;
951}
952
953
954
955
956/*-----------------------------------------------------------------------*/
957/* FAT access - Change value of a FAT entry */
958/*-----------------------------------------------------------------------*/
959/* Hidden API for hacks and disk tools */
960
961#if !FF_FS_READONLY
962FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */
963 FATFS* fs, /* File system object */
964 DWORD clst, /* FAT index number (cluster number) to be changed */
965 DWORD val /* New value to be set to the entry */
966)
967{
968 UINT bc;
969 BYTE *p;
970 FRESULT res;
971
972
973 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
974 res = FR_INT_ERR;
975
976 } else {
977 switch (fs->fs_type) {
978 case FS_FAT12 :
979 bc = (UINT)clst; bc += bc / 2;
980 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
981 if (res != FR_OK) break;
982 p = &fs->win[bc++ % SS(fs)];
983 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val;
984 fs->wflag = 1;
985 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
986 if (res != FR_OK) break;
987 p = &fs->win[bc % SS(fs)];
988 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F));
989 fs->wflag = 1;
990 break;
991
992 case FS_FAT16 :
993 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
994 if (res != FR_OK) break;
995 p = &fs->win[clst * 2 % SS(fs)];
996 ST_WORD(p, (WORD)val);
997 fs->wflag = 1;
998 break;
999
1000 case FS_FAT32 :
1001 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
1002 if (res != FR_OK) break;
1003 p = &fs->win[clst * 4 % SS(fs)];
1004 val |= LD_DWORD(p) & 0xF0000000;
1005 ST_DWORD(p, val);
1006 fs->wflag = 1;
1007 break;
1008
1009 default :
1010 res = FR_INT_ERR;
1011 }
1012 }
1013
1014 return res;
1015}
1016#endif /* !FF_FS_READONLY */
1017
1018
1019
1020
1021/*-----------------------------------------------------------------------*/
1022/* FAT handling - Remove a cluster chain */
1023/*-----------------------------------------------------------------------*/
1024#if !FF_FS_READONLY
1025static
1026FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */
1027 FATFS* fs, /* File system object */
1028 DWORD clst /* Cluster# to remove a chain from */
1029)
1030{
1031 FRESULT res;
1032 DWORD nxt;
1033#if FF_USE_TRIM
1034 DWORD scl = clst, ecl = clst, rt[2];
1035#endif
1036
1037 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
1038 res = FR_INT_ERR;
1039
1040 } else {
1041 res = FR_OK;
1042 while (clst < fs->n_fatent) { /* Not a last link? */
1043 nxt = get_fat(fs, clst); /* Get cluster status */
1044 if (nxt == 0) break; /* Empty cluster? */
1045 if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
1046 if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
1047 res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
1048 if (res != FR_OK) break;
1049 if (fs->free_clust != 0xFFFFFFFF) { /* Update FSINFO */
1050 fs->free_clust++;
1051 fs->fsi_flag |= 1;
1052 }
1053#if FF_USE_TRIM
1054 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
1055 ecl = nxt;
1056 } else { /* End of contiguous clusters */
1057 rt[0] = clust2sect(fs, scl); /* Start sector */
1058 rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */
1059 disk_ioctl(fs->drv, CTRL_TRIM, rt); /* Erase the block */
1060 scl = ecl = nxt;
1061 }
1062#endif
1063 clst = nxt; /* Next cluster */
1064 }
1065 }
1066
1067 return res;
1068}
1069#endif
1070
1071
1072
1073
1074/*-----------------------------------------------------------------------*/
1075/* FAT handling - Stretch or Create a cluster chain */
1076/*-----------------------------------------------------------------------*/
1077#if !FF_FS_READONLY
1078static
1079DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
1080 FATFS* fs, /* File system object */
1081 DWORD clst /* Cluster# to stretch, 0:Create a new chain */
1082)
1083{
1084 DWORD cs, ncl, scl;
1085 FRESULT res;
1086
1087
1088 if (clst == 0) { /* Create a new chain */
1089 scl = fs->last_clust; /* Get suggested start point */
1090 if (!scl || scl >= fs->n_fatent) scl = 1;
1091 }
1092 else { /* Stretch the current chain */
1093 cs = get_fat(fs, clst); /* Check the cluster status */
1094 if (cs < 2) return 1; /* Invalid value */
1095 if (cs == 0xFFFFFFFF) return cs; /* A disk error occurred */
1096 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
1097 scl = clst;
1098 }
1099
1100 ncl = scl; /* Start cluster */
1101 for (;;) {
1102 ncl++; /* Next cluster */
1103 if (ncl >= fs->n_fatent) { /* Check wrap around */
1104 ncl = 2;
1105 if (ncl > scl) return 0; /* No free cluster */
1106 }
1107 cs = get_fat(fs, ncl); /* Get the cluster status */
1108 if (cs == 0) break; /* Found a free cluster */
1109 if (cs == 0xFFFFFFFF || cs == 1)/* An error occurred */
1110 return cs;
1111 if (ncl == scl) return 0; /* No free cluster */
1112 }
1113
1114 res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */
1115 if (res == FR_OK && clst != 0) {
1116 res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */
1117 }
1118 if (res == FR_OK) {
1119 fs->last_clust = ncl; /* Update FSINFO */
1120 if (fs->free_clust != 0xFFFFFFFF) {
1121 fs->free_clust--;
1122 fs->fsi_flag |= 1;
1123 }
1124 } else {
1125 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
1126 }
1127
1128 return ncl; /* Return new cluster number or error code */
1129}
1130#endif /* !FF_FS_READONLY */
1131
1132
1133
1134
1135/*-----------------------------------------------------------------------*/
1136/* FAT handling - Convert offset into cluster with link map table */
1137/*-----------------------------------------------------------------------*/
1138
1139#if FF_USE_FASTSEEK
1140static
1141DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
1142 FIL* fp, /* Pointer to the file object */
1143 DWORD ofs /* File offset to be converted to cluster# */
1144)
1145{
1146 DWORD cl, ncl, *tbl;
1147
1148
1149 tbl = fp->cltbl + 1; /* Top of CLMT */
1150 cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */
1151 for (;;) {
1152 ncl = *tbl++; /* Number of cluters in the fragment */
1153 if (!ncl) return 0; /* End of table? (error) */
1154 if (cl < ncl) break; /* In this fragment? */
1155 cl -= ncl; tbl++; /* Next fragment */
1156 }
1157 return cl + *tbl; /* Return the cluster number */
1158}
1159#endif /* FF_USE_FASTSEEK */
1160
1161
1162
1163
1164/*-----------------------------------------------------------------------*/
1165/* Directory handling - Set directory index */
1166/*-----------------------------------------------------------------------*/
1167
1168static
1169FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */
1170 FATFS_DIR* dp, /* Pointer to directory object */
1171 UINT idx /* Index of directory table */
1172)
1173{
1174 DWORD clst, sect;
1175 UINT ic;
1176
1177
1178 dp->index = (WORD)idx; /* Current index */
1179 clst = dp->sclust; /* Table start cluster (0:root) */
1180 if (clst == 1 || clst >= dp->fs->n_fatent) /* Check start cluster range */
1181 return FR_INT_ERR;
1182 if (!clst && dp->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
1183 clst = dp->fs->dirbase;
1184
1185 if (clst == 0) { /* Static table (root-directory in FAT12/16) */
1186 if (idx >= dp->fs->n_rootdir) /* Is index out of range? */
1187 return FR_INT_ERR;
1188 sect = dp->fs->dirbase;
1189 }
1190 else { /* Dynamic table (root-directory in FAT32 or sub-directory) */
1191 ic = SS(dp->fs) / SZ_DIRE * dp->fs->csize; /* Entries per cluster */
1192 while (idx >= ic) { /* Follow cluster chain */
1193 clst = get_fat(dp->fs, clst); /* Get next cluster */
1194 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1195 if (clst < 2 || clst >= dp->fs->n_fatent) /* Reached to end of table or internal error */
1196 return FR_INT_ERR;
1197 idx -= ic;
1198 }
1199 sect = clust2sect(dp->fs, clst);
1200 }
1201 dp->clust = clst; /* Current cluster# */
1202 if (!sect) return FR_INT_ERR;
1203 dp->sect = sect + idx / (SS(dp->fs) / SZ_DIRE); /* Sector# of the directory entry */
1204 dp->dir = dp->fs->win + (idx % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Ptr to the entry in the sector */
1205
1206 return FR_OK;
1207}
1208
1209
1210
1211
1212/*-----------------------------------------------------------------------*/
1213/* Directory handling - Move directory table index next */
1214/*-----------------------------------------------------------------------*/
1215
1216static
1217FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
1218 FATFS_DIR* dp, /* Pointer to the directory object */
1219 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
1220)
1221{
1222 DWORD clst;
1223 UINT i;
1224#if !FF_FS_READONLY
1225 UINT c;
1226#endif
1227
1228
1229 i = dp->index + 1;
1230 if (!(i & 0xFFFF) || !dp->sect) /* Report EOT when index has reached 65535 */
1231 return FR_NO_FILE;
1232
1233 if (!(i % (SS(dp->fs) / SZ_DIRE))) { /* Sector changed? */
1234 dp->sect++; /* Next sector */
1235
1236 if (!dp->clust) { /* Static table */
1237 if (i >= dp->fs->n_rootdir) /* Report EOT if it reached end of static table */
1238 return FR_NO_FILE;
1239 }
1240 else { /* Dynamic table */
1241 if (((i / (SS(dp->fs) / SZ_DIRE)) & (dp->fs->csize - 1)) == 0) { /* Cluster changed? */
1242 clst = get_fat(dp->fs, dp->clust); /* Get next cluster */
1243 if (clst <= 1) return FR_INT_ERR;
1244 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1245 if (clst >= dp->fs->n_fatent) { /* If it reached end of dynamic table, */
1246#if !FF_FS_READONLY
1247 if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT */
1248 clst = create_chain(dp->fs, dp->clust); /* Stretch cluster chain */
1249 if (clst == 0) return FR_DENIED; /* No free cluster */
1250 if (clst == 1) return FR_INT_ERR;
1251 if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
1252 /* Clean-up stretched table */
1253 if (sync_window(dp->fs)) return FR_DISK_ERR;/* Flush disk access window */
1254 mem_set(dp->fs->win, 0, SS(dp->fs)); /* Clear window buffer */
1255 dp->fs->winsect = clust2sect(dp->fs, clst); /* Cluster start sector */
1256 for (c = 0; c < dp->fs->csize; c++) { /* Fill the new cluster with 0 */
1257 dp->fs->wflag = 1;
1258 if (sync_window(dp->fs)) return FR_DISK_ERR;
1259 dp->fs->winsect++;
1260 }
1261 dp->fs->winsect -= c; /* Rewind window offset */
1262#else
1263 if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT (this is to suppress warning) */
1264 return FR_NO_FILE; /* Report EOT */
1265#endif
1266 }
1267 dp->clust = clst; /* Initialize data for new cluster */
1268 dp->sect = clust2sect(dp->fs, clst);
1269 }
1270 }
1271 }
1272
1273 dp->index = (WORD)i; /* Current index */
1274 dp->dir = dp->fs->win + (i % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Current entry in the window */
1275
1276 return FR_OK;
1277}
1278
1279
1280
1281
1282/*-----------------------------------------------------------------------*/
1283/* Directory handling - Reserve directory entry */
1284/*-----------------------------------------------------------------------*/
1285
1286#if !FF_FS_READONLY
1287static
1288FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */
1289 FATFS_DIR* dp, /* Pointer to the directory object */
1290 UINT nent /* Number of contiguous entries to allocate (1-21) */
1291)
1292{
1293 FRESULT res;
1294 UINT n;
1295
1296
1297 res = dir_sdi(dp, 0);
1298 if (res == FR_OK) {
1299 n = 0;
1300 do {
1301 res = move_window(dp->fs, dp->sect);
1302 if (res != FR_OK) break;
1303 if (dp->dir[0] == DDEM || dp->dir[0] == 0) { /* Is it a free entry? */
1304 if (++n == nent) break; /* A block of contiguous free entries is found */
1305 } else {
1306 n = 0; /* Not a blank entry. Restart to search */
1307 }
1308 res = dir_next(dp, 1); /* Next entry with table stretch enabled */
1309 } while (res == FR_OK);
1310 }
1311 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
1312 return res;
1313}
1314#endif
1315
1316
1317
1318
1319/*-----------------------------------------------------------------------*/
1320/* Directory handling - Load/Store start cluster number */
1321/*-----------------------------------------------------------------------*/
1322
1323static
1324DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */
1325 FATFS* fs, /* Pointer to the fs object */
1326 const BYTE* dir /* Pointer to the SFN entry */
1327)
1328{
1329 DWORD cl;
1330
1331 cl = LD_WORD(dir + DIR_FstClusLO);
1332 if (fs->fs_type == FS_FAT32)
1333 cl |= (DWORD)LD_WORD(dir + DIR_FstClusHI) << 16;
1334
1335 return cl;
1336}
1337
1338
1339#if !FF_FS_READONLY
1340static
1341void st_clust (
1342 BYTE* dir, /* Pointer to the SFN entry */
1343 DWORD cl /* Value to be set */
1344)
1345{
1346 ST_WORD(dir + DIR_FstClusLO, cl);
1347 ST_WORD(dir + DIR_FstClusHI, cl >> 16);
1348}
1349#endif
1350
1351
1352
1353
1354/*-----------------------------------------------------------------------*/
1355/* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
1356/*-----------------------------------------------------------------------*/
1357#if FF_USE_LFN
1358static
1359const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN characters in the directory entry */
1360
1361
1362static
1363int cmp_lfn ( /* 1:matched, 0:not matched */
1364 WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */
1365 BYTE* dir /* Pointer to the directory entry containing the part of LFN */
1366)
1367{
1368 UINT i, s;
1369 WCHAR wc, uc;
1370
1371
1372 if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
1373
1374 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1375
1376 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1377 uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */
1378 if (wc) {
1379 if (i >= FF_MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) /* Compare it */
1380 return 0; /* Not matched */
1381 wc = uc;
1382 } else {
1383 if (uc != 0xFFFF) return 0; /* Check filler */
1384 }
1385 }
1386
1387 if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) /* Last segment matched but different length */
1388 return 0;
1389
1390 return 1; /* The part of LFN matched */
1391}
1392
1393
1394
1395static
1396int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */
1397 WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
1398 BYTE* dir /* Pointer to the LFN entry */
1399)
1400{
1401 UINT i, s;
1402 WCHAR wc, uc;
1403
1404
1405 if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
1406
1407 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1408
1409 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1410 uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */
1411 if (wc) {
1412 if (i >= FF_MAX_LFN) return 0; /* Buffer overflow? */
1413 lfnbuf[i++] = wc = uc; /* Store it */
1414 } else {
1415 if (uc != 0xFFFF) return 0; /* Check filler */
1416 }
1417 }
1418
1419 if (dir[LDIR_Ord] & LLEF) { /* Put terminator if it is the last LFN part */
1420 if (i >= FF_MAX_LFN) return 0; /* Buffer overflow? */
1421 lfnbuf[i] = 0;
1422 }
1423
1424 return 1; /* The part of LFN is valid */
1425}
1426
1427
1428#if !FF_FS_READONLY
1429static
1430void fit_lfn (
1431 const WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
1432 BYTE* dir, /* Pointer to the LFN entry to be processed */
1433 BYTE ord, /* LFN order (1-20) */
1434 BYTE sum /* Checksum of the corresponding SFN */
1435)
1436{
1437 UINT i, s;
1438 WCHAR wc;
1439
1440
1441 dir[LDIR_Chksum] = sum; /* Set checksum */
1442 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
1443 dir[LDIR_Type] = 0;
1444 ST_WORD(dir + LDIR_FstClusLO, 0);
1445
1446 i = (ord - 1) * 13; /* Get offset in the LFN working buffer */
1447 s = wc = 0;
1448 do {
1449 if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective character */
1450 ST_WORD(dir+LfnOfs[s], wc); /* Put it */
1451 if (!wc) wc = 0xFFFF; /* Padding characters following last character */
1452 } while (++s < 13);
1453 if (wc == 0xFFFF || !lfnbuf[i]) ord |= LLEF; /* Bottom LFN part is the start of LFN sequence */
1454 dir[LDIR_Ord] = ord; /* Set the LFN order */
1455}
1456
1457#endif
1458#endif
1459
1460
1461
1462
1463/*-----------------------------------------------------------------------*/
1464/* Create numbered name */
1465/*-----------------------------------------------------------------------*/
1466#if FF_USE_LFN
1467static
1468void gen_numname (
1469 BYTE* dst, /* Pointer to the buffer to store numbered SFN */
1470 const BYTE* src, /* Pointer to SFN */
1471 const WCHAR* lfn, /* Pointer to LFN */
1472 UINT seq /* Sequence number */
1473)
1474{
1475 BYTE ns[8], c;
1476 UINT i, j;
1477 WCHAR wc;
1478 DWORD sr;
1479
1480
1481 mem_cpy(dst, src, 11);
1482
1483 if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */
1484 sr = seq;
1485 while (*lfn) { /* Create a CRC */
1486 wc = *lfn++;
1487 for (i = 0; i < 16; i++) {
1488 sr = (sr << 1) + (wc & 1);
1489 wc >>= 1;
1490 if (sr & 0x10000) sr ^= 0x11021;
1491 }
1492 }
1493 seq = (UINT)sr;
1494 }
1495
1496 /* itoa (hexdecimal) */
1497 i = 7;
1498 do {
1499 c = (seq % 16) + '0';
1500 if (c > '9') c += 7;
1501 ns[i--] = c;
1502 seq /= 16;
1503 } while (seq);
1504 ns[i] = '~';
1505
1506 /* Append the number */
1507 for (j = 0; j < i && dst[j] != ' '; j++) {
1508 if (IsDBCS1(dst[j])) {
1509 if (j == i - 1) break;
1510 j++;
1511 }
1512 }
1513 do {
1514 dst[j++] = (i < 8) ? ns[i++] : ' ';
1515 } while (j < 8);
1516}
1517#endif
1518
1519
1520
1521
1522/*-----------------------------------------------------------------------*/
1523/* Calculate checksum of an SFN entry */
1524/*-----------------------------------------------------------------------*/
1525#if FF_USE_LFN
1526static
1527BYTE sum_sfn (
1528 const BYTE* dir /* Pointer to the SFN entry */
1529)
1530{
1531 BYTE sum = 0;
1532 UINT n = 11;
1533
1534 do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
1535 return sum;
1536}
1537#endif
1538
1539
1540
1541
1542/*-----------------------------------------------------------------------*/
1543/* Directory handling - Find an object in the directory */
1544/*-----------------------------------------------------------------------*/
1545
1546static
1547FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */
1548 FATFS_DIR* dp /* Pointer to the directory object linked to the file name */
1549)
1550{
1551 FRESULT res;
1552 BYTE c, *dir;
1553#if FF_USE_LFN
1554 BYTE a, ord, sum;
1555#endif
1556
1557 res = dir_sdi(dp, 0); /* Rewind directory object */
1558 if (res != FR_OK) return res;
1559
1560#if FF_USE_LFN
1561 ord = sum = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1562#endif
1563 do {
1564 res = move_window(dp->fs, dp->sect);
1565 if (res != FR_OK) break;
1566 dir = dp->dir; /* Ptr to the directory entry of current index */
1567 c = dir[DIR_Name];
1568 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
1569#if FF_USE_LFN /* LFN configuration */
1570 a = dir[DIR_Attr] & AM_MASK;
1571 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
1572 ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1573 } else {
1574 if (a == AM_LFN) { /* An LFN entry is found */
1575 if (dp->lfn) {
1576 if (c & LLEF) { /* Is it start of LFN sequence? */
1577 sum = dir[LDIR_Chksum];
1578 c &= ~LLEF; ord = c; /* LFN start order */
1579 dp->lfn_idx = dp->index; /* Start index of LFN */
1580 }
1581 /* Check validity of the LFN entry and compare it with given name */
1582 ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
1583 }
1584 } else { /* An SFN entry is found */
1585 if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
1586 if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dir, dp->fn, 11)) break; /* SFN matched? */
1587 ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
1588 }
1589 }
1590#else /* Non LFN configuration */
1591 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dp->fn, 11)) /* Is it a valid entry? */
1592 break;
1593#endif
1594 res = dir_next(dp, 0); /* Next entry */
1595 } while (res == FR_OK);
1596
1597 return res;
1598}
1599
1600
1601
1602
1603/*-----------------------------------------------------------------------*/
1604/* Read an object from the directory */
1605/*-----------------------------------------------------------------------*/
1606#if FF_FS_MINIMIZE <= 1 || FF_USE_LABEL || FF_FS_RPATH >= 2
1607static
1608FRESULT dir_read (
1609 FATFS_DIR* dp, /* Pointer to the directory object */
1610 int vol /* Filtered by 0:file/directory or 1:volume label */
1611)
1612{
1613 FRESULT res;
1614 BYTE a, c, *dir;
1615#if FF_USE_LFN
1616 BYTE ord = 0xFF, sum = 0xFF;
1617#endif
1618
1619 res = FR_NO_FILE;
1620 while (dp->sect) {
1621 res = move_window(dp->fs, dp->sect);
1622 if (res != FR_OK) break;
1623 dir = dp->dir; /* Ptr to the directory entry of current index */
1624 c = dir[DIR_Name];
1625 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
1626 a = dir[DIR_Attr] & AM_MASK;
1627#if FF_USE_LFN /* LFN configuration */
1628 if (c == DDEM || (!FF_FS_RPATH && c == '.') || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */
1629 ord = 0xFF;
1630 } else {
1631 if (a == AM_LFN) { /* An LFN entry is found */
1632 if (c & LLEF) { /* Is it start of LFN sequence? */
1633 sum = dir[LDIR_Chksum];
1634 c &= ~LLEF; ord = c;
1635 dp->lfn_idx = dp->index;
1636 }
1637 /* Check LFN validity and capture it */
1638 ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
1639 } else { /* An SFN entry is found */
1640 if (ord || sum != sum_sfn(dir)) /* Is there a valid LFN? */
1641 dp->lfn_idx = 0xFFFF; /* It has no LFN. */
1642 break;
1643 }
1644 }
1645#else /* Non LFN configuration */
1646 if (c != DDEM && (FF_FS_RPATH || c != '.') && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) /* Is it a valid entry? */
1647 break;
1648#endif
1649 res = dir_next(dp, 0); /* Next entry */
1650 if (res != FR_OK) break;
1651 }
1652
1653 if (res != FR_OK) dp->sect = 0;
1654
1655 return res;
1656}
1657#endif /* FF_FS_MINIMIZE <= 1 || FF_USE_LABEL || FF_FS_RPATH >= 2 */
1658
1659
1660
1661
1662/*-----------------------------------------------------------------------*/
1663/* Register an object to the directory */
1664/*-----------------------------------------------------------------------*/
1665#if !FF_FS_READONLY
1666static
1667FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */
1668 FATFS_DIR* dp /* Target directory with object name to be created */
1669)
1670{
1671 FRESULT res;
1672#if FF_USE_LFN /* LFN configuration */
1673 UINT n, nent;
1674 BYTE sn[12], *fn, sum;
1675 WCHAR *lfn;
1676
1677
1678 fn = dp->fn; lfn = dp->lfn;
1679 mem_cpy(sn, fn, 12);
1680
1681 if (FF_FS_RPATH && (sn[NSFLAG] & NS_DOT)) /* Cannot create dot entry */
1682 return FR_INVALID_NAME;
1683
1684 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
1685 fn[NSFLAG] = 0; dp->lfn = 0; /* Find only SFN */
1686 for (n = 1; n < 100; n++) {
1687 gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
1688 res = dir_find(dp); /* Check if the name collides with existing SFN */
1689 if (res != FR_OK) break;
1690 }
1691 if (n == 100) return FR_DENIED; /* Abort if too many collisions */
1692 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
1693 fn[NSFLAG] = sn[NSFLAG]; dp->lfn = lfn;
1694 }
1695
1696 if (sn[NSFLAG] & NS_LFN) { /* When LFN is to be created, allocate entries for an SFN + LFNs. */
1697 for (n = 0; lfn[n]; n++) ;
1698 nent = (n + 25) / 13;
1699 } else { /* Otherwise allocate an entry for an SFN */
1700 nent = 1;
1701 }
1702 res = dir_alloc(dp, nent); /* Allocate entries */
1703
1704 if (res == FR_OK && --nent) { /* Set LFN entry if needed */
1705 res = dir_sdi(dp, dp->index - nent);
1706 if (res == FR_OK) {
1707 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */
1708 do { /* Store LFN entries in bottom first */
1709 res = move_window(dp->fs, dp->sect);
1710 if (res != FR_OK) break;
1711 fit_lfn(dp->lfn, dp->dir, (BYTE)nent, sum);
1712 dp->fs->wflag = 1;
1713 res = dir_next(dp, 0); /* Next entry */
1714 } while (res == FR_OK && --nent);
1715 }
1716 }
1717#else /* Non LFN configuration */
1718 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */
1719#endif
1720
1721 if (res == FR_OK) { /* Set SFN entry */
1722 res = move_window(dp->fs, dp->sect);
1723 if (res == FR_OK) {
1724 mem_set(dp->dir, 0, SZ_DIRE); /* Clean the entry */
1725 mem_cpy(dp->dir, dp->fn, 11); /* Put SFN */
1726#if FF_USE_LFN
1727 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */
1728#endif
1729 dp->fs->wflag = 1;
1730 }
1731 }
1732
1733 return res;
1734}
1735#endif /* !FF_FS_READONLY */
1736
1737
1738
1739
1740/*-----------------------------------------------------------------------*/
1741/* Remove an object from the directory */
1742/*-----------------------------------------------------------------------*/
1743#if !FF_FS_READONLY && !FF_FS_MINIMIZE
1744static
1745FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */
1746 FATFS_DIR* dp /* Directory object pointing the entry to be removed */
1747)
1748{
1749 FRESULT res;
1750#if FF_USE_LFN /* LFN configuration */
1751 UINT i;
1752
1753 i = dp->index; /* SFN index */
1754 res = dir_sdi(dp, (dp->lfn_idx == 0xFFFF) ? i : dp->lfn_idx); /* Goto the SFN or top of the LFN entries */
1755 if (res == FR_OK) {
1756 do {
1757 res = move_window(dp->fs, dp->sect);
1758 if (res != FR_OK) break;
1759 mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */
1760 *dp->dir = DDEM;
1761 dp->fs->wflag = 1;
1762 if (dp->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
1763 res = dir_next(dp, 0); /* Next entry */
1764 } while (res == FR_OK);
1765 if (res == FR_NO_FILE) res = FR_INT_ERR;
1766 }
1767
1768#else /* Non LFN configuration */
1769 res = dir_sdi(dp, dp->index);
1770 if (res == FR_OK) {
1771 res = move_window(dp->fs, dp->sect);
1772 if (res == FR_OK) {
1773 mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */
1774 *dp->dir = DDEM;
1775 dp->fs->wflag = 1;
1776 }
1777 }
1778#endif
1779
1780 return res;
1781}
1782#endif /* !FF_FS_READONLY */
1783
1784
1785
1786
1787/*-----------------------------------------------------------------------*/
1788/* Get file information from directory entry */
1789/*-----------------------------------------------------------------------*/
1790#if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2
1791static
1792void get_fileinfo ( /* No return code */
1793 FATFS_DIR* dp, /* Pointer to the directory object */
1794 FILINFO* fno /* Pointer to the file information to be filled */
1795)
1796{
1797 UINT i;
1798 TCHAR *p, c;
1799 BYTE *dir;
1800#if FF_USE_LFN
1801 WCHAR w, *lfn;
1802#endif
1803#if FF_CODE_PAGE == 65001
1804 unsigned char utf8_code[6];
1805 int code_size;
1806#endif
1807
1808 p = fno->fname;
1809 if (dp->sect) { /* Get SFN */
1810 dir = dp->dir;
1811 i = 0;
1812 while (i < 11) { /* Copy name body and extension */
1813 c = (TCHAR)dir[i++];
1814 if (c == ' ') continue; /* Skip padding spaces */
1815 if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */
1816 if (i == 9) *p++ = '.'; /* Insert a . if extension is exist */
1817#if FF_USE_LFN
1818 if (IsUpper(c) && (dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY)))
1819 c += 0x20; /* To lower */
1820#if FF_LFN_UNICODE
1821 if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dir[i]))
1822 c = c << 8 | dir[i++];
1823 c = ff_convert(c, 1); /* OEM -> Unicode */
1824 if (!c) c = '?';
1825#endif
1826#endif
1827 *p++ = c;
1828 }
1829 fno->fattrib = dir[DIR_Attr]; /* Attribute */
1830 fno->fsize = LD_DWORD(dir + DIR_FileSize); /* Size */
1831 fno->fdate = LD_WORD(dir + DIR_WrtDate); /* Date */
1832 fno->ftime = LD_WORD(dir + DIR_WrtTime); /* Time */
1833 }
1834 *p = 0; /* Terminate SFN string by a \0 */
1835
1836#if FF_USE_LFN
1837 if (fno->lfname) {
1838 i = 0; p = fno->lfname;
1839 if (dp->sect && fno->lfsize && dp->lfn_idx != 0xFFFF) { /* Get LFN if available */
1840 lfn = dp->lfn;
1841 while ((w = *lfn++) != 0) { /* Get an LFN character */
1842#if !FF_LFN_UNICODE
1843#if FF_CODE_PAGE == 65001
1844 Utf16_to_Utf8(utf8_code, &code_size, w);
1845 for (int j = 0; j < code_size - 1; j++) {
1846 p[i++] = utf8_code[j];
1847 }
1848 w = utf8_code[code_size - 1];
1849#else
1850 w = ff_convert(w, 0); /* Unicode -> OEM */
1851 if (!w) { i = 0; break; } /* No LFN if it could not be converted */
1852 if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
1853 p[i++] = (TCHAR)(w >> 8);
1854#endif
1855#endif
1856 if (i >= fno->lfsize - 1) { i = 0; break; } /* No LFN if buffer overflow */
1857 p[i++] = (TCHAR)w;
1858 }
1859 }
1860 p[i] = 0; /* Terminate LFN string by a \0 */
1861 }
1862#endif
1863}
1864#endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */
1865
1866
1867
1868
1869/*-----------------------------------------------------------------------*/
1870/* Pattern matching */
1871/*-----------------------------------------------------------------------*/
1872#if FF_USE_FIND && FF_FS_MINIMIZE <= 1
1873static
1874WCHAR get_achar ( /* Get a character and advances ptr 1 or 2 */
1875 const TCHAR** ptr /* Pointer to pointer to the SBCS/DBCS/Unicode string */
1876)
1877{
1878 WCHAR chr;
1879
1880#if !FF_LFN_UNICODE
1881#if FF_CODE_PAGE == 65001
1882 int code_size;
1883 chr = Utf8_to_Utf16(*ptr, &code_size);
1884 (*ptr) += code_size;
1885#else
1886 chr = (BYTE)*(*ptr)++; /* Get a byte */
1887 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */
1888 if (IsDBCS1(chr) && IsDBCS2(**ptr)) /* Get DBC 2nd byte if needed */
1889 chr = chr << 8 | (BYTE)*(*ptr)++;
1890#endif
1891#ifdef _EXCVT
1892 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
1893#endif
1894#else
1895 chr = ff_wtoupper(*(*ptr)++); /* Get a word and to upper */
1896#endif
1897 return chr;
1898}
1899
1900
1901static
1902int pattern_matching ( /* 0:mismatched, 1:matched */
1903 const TCHAR* pat, /* Matching pattern */
1904 const TCHAR* nam, /* String to be tested */
1905 int skip, /* Number of pre-skip chars (number of ?s) */
1906 int inf /* Infinite search (* specified) */
1907)
1908{
1909 const TCHAR *pp, *np;
1910 WCHAR pc, nc;
1911 int nm, nx;
1912
1913
1914 while (skip--) { /* Pre-skip name chars */
1915 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */
1916 }
1917 if (!*pat && inf) return 1; /* (short circuit) */
1918
1919 do {
1920 pp = pat; np = nam; /* Top of pattern and name to match */
1921 for (;;) {
1922 if (*pp == '?' || *pp == '*') { /* Wildcard? */
1923 nm = nx = 0;
1924 do { /* Analyze the wildcard chars */
1925 if (*pp++ == '?') nm++; else nx = 1;
1926 } while (*pp == '?' || *pp == '*');
1927 if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */
1928 nc = *np; break; /* Branch mismatched */
1929 }
1930 pc = get_achar(&pp); /* Get a pattern char */
1931 nc = get_achar(&np); /* Get a name char */
1932 if (pc != nc) break; /* Branch mismatched? */
1933 if (!pc) return 1; /* Branch matched? (matched at end of both strings) */
1934 }
1935 get_achar(&nam); /* nam++ */
1936 } while (inf && nc); /* Retry until end of name if infinite search is specified */
1937
1938 return 0;
1939}
1940#endif /* FF_USE_FIND && FF_FS_MINIMIZE <= 1 */
1941
1942
1943
1944
1945/*-----------------------------------------------------------------------*/
1946/* Pick a top segment and create the object name in directory form */
1947/*-----------------------------------------------------------------------*/
1948
1949static
1950FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */
1951 FATFS_DIR* dp, /* Pointer to the directory object */
1952 const TCHAR** path /* Pointer to pointer to the segment in the path string */
1953)
1954{
1955#if FF_USE_LFN /* LFN configuration */
1956 BYTE b, cf;
1957 WCHAR w, *lfn;
1958 UINT i, ni, si, di;
1959 const TCHAR *p;
1960#if FF_CODE_PAGE == 65001
1961 unsigned char utf8_code[6];
1962 int code_size;
1963#endif
1964 /* Create LFN in Unicode */
1965 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Strip duplicated separator */
1966 lfn = dp->lfn;
1967 si = di = 0;
1968 for (;;) {
1969 w = p[si++]; /* Get a character */
1970 if (w < ' ' || w == '/' || w == '\\') break; /* Break on end of segment */
1971 if (di >= FF_MAX_LFN) /* Reject too long name */
1972 return FR_INVALID_NAME;
1973#if !FF_LFN_UNICODE
1974#if FF_CODE_PAGE == 65001
1975 w = Utf8_to_Utf16(&p[si - 1], &code_size);
1976 si += code_size - 1;
1977#else
1978 w &= 0xFF;
1979 if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
1980 b = (BYTE)p[si++]; /* Get 2nd byte */
1981 w = (w << 8) + b; /* Create a DBC */
1982 if (!IsDBCS2(b))
1983 return FR_INVALID_NAME; /* Reject invalid sequence */
1984 }
1985 w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */
1986 if (!w) return FR_INVALID_NAME; /* Reject invalid code */
1987#endif
1988#endif
1989 if (w < 0x80 && chk_chr("\"*:<>\?|\x7F", w)) /* Reject illegal characters for LFN */
1990 return FR_INVALID_NAME;
1991 lfn[di++] = w; /* Store the Unicode character */
1992 }
1993 *path = &p[si]; /* Return pointer to the next segment */
1994 cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
1995#if FF_FS_RPATH
1996 if ((di == 1 && lfn[di - 1] == '.') ||
1997 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot entry? */
1998 lfn[di] = 0;
1999 for (i = 0; i < 11; i++) /* Create dot name for SFN entry */
2000 dp->fn[i] = (i < di) ? '.' : ' ';
2001 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */
2002 return FR_OK;
2003 }
2004#endif
2005 while (di) { /* Snip off trailing spaces and dots if exist */
2006 w = lfn[di - 1];
2007 if (w != ' ' && w != '.') break;
2008 di--;
2009 }
2010 if (!di) return FR_INVALID_NAME; /* Reject nul string */
2011 lfn[di] = 0; /* LFN is created */
2012
2013 /* Create SFN in directory form */
2014 mem_set(dp->fn, ' ', 11);
2015 for (si = 0; lfn[si] == ' ' || lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
2016 if (si) cf |= NS_LOSS | NS_LFN;
2017 while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
2018
2019 b = i = 0; ni = 8;
2020 for (;;) {
2021 w = lfn[si++]; /* Get an LFN character */
2022 if (!w) break; /* Break on end of the LFN */
2023 if (w == ' ' || (w == '.' && si != di)) { /* Remove spaces and dots */
2024 cf |= NS_LOSS | NS_LFN; continue;
2025 }
2026
2027 if (i >= ni || si == di) { /* Extension or end of SFN */
2028 if (ni == 11) { /* Long extension */
2029 cf |= NS_LOSS | NS_LFN; break;
2030 }
2031 if (si != di) cf |= NS_LOSS | NS_LFN; /* Out of 8.3 format */
2032 if (si > di) break; /* No extension */
2033 si = di; i = 8; ni = 11; /* Enter extension section */
2034 b <<= 2; continue;
2035 }
2036
2037 if (w >= 0x80) { /* Non ASCII character */
2038#ifdef _EXCVT
2039 w = ff_convert(w, 0); /* Unicode -> OEM code */
2040 if (w) w = ExCvt[w - 0x80]; /* Convert extended character to upper (SBCS) */
2041#else
2042#if FF_CODE_PAGE == 65001
2043 Utf16_to_Utf8(utf8_code, &code_size, ff_wtoupper(w));
2044#else
2045 w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
2046#endif
2047#endif
2048 cf |= NS_LFN; /* Force create LFN entry */
2049 }
2050#if FF_CODE_PAGE == 65001
2051 else
2052 code_size = 1;
2053#endif
2054
2055#if FF_CODE_PAGE == 65001
2056 if (code_size > 1) { /* Is this DBC? (always false at SBCS cfg) */
2057 if (i >= ni - 1) {
2058 cf |= NS_LOSS | NS_LFN; i = ni; continue;
2059 }
2060 for (int j = 0; j < code_size; j++) {
2061 dp->fn[i++] = (BYTE)utf8_code[j];
2062 }
2063 }
2064 else { /* SBC */
2065 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */
2066 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
2067 }
2068 else {
2069 if (IsUpper(w)) { /* ASCII large capital */
2070 b |= 2;
2071 }
2072 else {
2073 if (IsLower(w)) { /* ASCII small capital */
2074 b |= 1; w -= 0x20;
2075 }
2076 }
2077 }
2078 dp->fn[i++] = (BYTE)w;
2079 }
2080#else
2081 if (_DF1S && w >= 0x100) { /* Is this DBC? (always false at SBCS cfg) */
2082 if (i >= ni - 1) {
2083 cf |= NS_LOSS | NS_LFN; i = ni; continue;
2084 }
2085 dp->fn[i++] = (BYTE)(w >> 8);
2086 } else { /* SBC */
2087 if (!w || chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */
2088 w = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
2089 } else {
2090 if (IsUpper(w)) { /* ASCII large capital */
2091 b |= 2;
2092 } else {
2093 if (IsLower(w)) { /* ASCII small capital */
2094 b |= 1; w -= 0x20;
2095 }
2096 }
2097 }
2098 }
2099 dp->fn[i++] = (BYTE)w;
2100#endif
2101 }
2102
2103 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
2104
2105 if (ni == 8) b <<= 2;
2106 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
2107 cf |= NS_LFN;
2108 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */
2109 if ((b & 0x03) == 0x01) cf |= NS_EXT; /* NT flag (Extension has only small capital) */
2110 if ((b & 0x0C) == 0x04) cf |= NS_BODY; /* NT flag (Filename has only small capital) */
2111 }
2112
2113 dp->fn[NSFLAG] = cf; /* SFN is created */
2114
2115 return FR_OK;
2116
2117
2118#else /* Non-LFN configuration */
2119 BYTE b, c, d, *sfn;
2120 UINT ni, si, i;
2121 const char *p;
2122
2123 /* Create file name in directory form */
2124 for (p = *path; *p == '/' || *p == '\\'; p++) ; /* Skip duplicated separator */
2125 sfn = dp->fn;
2126 mem_set(sfn, ' ', 11);
2127 si = i = b = 0; ni = 8;
2128#if FF_FS_RPATH
2129 if (p[si] == '.') { /* Is this a dot entry? */
2130 for (;;) {
2131 c = (BYTE)p[si++];
2132 if (c != '.' || si >= 3) break;
2133 sfn[i++] = c;
2134 }
2135 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
2136 *path = &p[si]; /* Return pointer to the next segment */
2137 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of path */
2138 return FR_OK;
2139 }
2140#endif
2141 for (;;) {
2142 c = (BYTE)p[si++];
2143 if (c <= ' ' || c == '/' || c == '\\') break; /* Break on end of segment */
2144 if (c == '.' || i >= ni) {
2145 if (ni != 8 || c != '.') return FR_INVALID_NAME;
2146 i = 8; ni = 11;
2147 b <<= 2; continue;
2148 }
2149 if (c >= 0x80) { /* Extended character? */
2150 b |= 3; /* Eliminate NT flag */
2151#ifdef _EXCVT
2152 c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */
2153#else
2154#if !_DF1S
2155 return FR_INVALID_NAME; /* Reject extended characters (ASCII cfg) */
2156#endif
2157#endif
2158 }
2159 if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false at SBCS cfg.) */
2160 d = (BYTE)p[si++]; /* Get 2nd byte */
2161 if (!IsDBCS2(d) || i >= ni - 1) /* Reject invalid DBC */
2162 return FR_INVALID_NAME;
2163 sfn[i++] = c;
2164 sfn[i++] = d;
2165 } else { /* SBC */
2166 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) /* Reject illegal chrs for SFN */
2167 return FR_INVALID_NAME;
2168 if (IsUpper(c)) { /* ASCII large capital? */
2169 b |= 2;
2170 } else {
2171 if (IsLower(c)) { /* ASCII small capital? */
2172 b |= 1; c -= 0x20;
2173 }
2174 }
2175 sfn[i++] = c;
2176 }
2177 }
2178 *path = &p[si]; /* Return pointer to the next segment */
2179 c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
2180
2181 if (!i) return FR_INVALID_NAME; /* Reject nul string */
2182 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* When first character collides with DDEM, replace it with RDDEM */
2183
2184 if (ni == 8) b <<= 2;
2185 if ((b & 0x03) == 0x01) c |= NS_EXT; /* NT flag (Name extension has only small capital) */
2186 if ((b & 0x0C) == 0x04) c |= NS_BODY; /* NT flag (Name body has only small capital) */
2187
2188 sfn[NSFLAG] = c; /* Store NT flag, File name is created */
2189
2190 return FR_OK;
2191#endif
2192}
2193
2194
2195
2196
2197/*-----------------------------------------------------------------------*/
2198/* Follow a file path */
2199/*-----------------------------------------------------------------------*/
2200
2201static
2202FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
2203 FATFS_DIR* dp, /* Directory object to return last directory and found object */
2204 const TCHAR* path /* Full-path string to find a file or directory */
2205)
2206{
2207 FRESULT res;
2208 BYTE *dir, ns;
2209
2210
2211#if FF_FS_RPATH
2212 if (*path == '/' || *path == '\\') { /* There is a heading separator */
2213 path++; dp->sclust = 0; /* Strip it and start from the root directory */
2214 } else { /* No heading separator */
2215 dp->sclust = dp->fs->cdir; /* Start from the current directory */
2216 }
2217#else
2218 if (*path == '/' || *path == '\\') /* Strip heading separator if exist */
2219 path++;
2220 dp->sclust = 0; /* Always start from the root directory */
2221#endif
2222
2223 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */
2224 res = dir_sdi(dp, 0);
2225 dp->dir = 0;
2226 } else { /* Follow path */
2227 for (;;) {
2228 res = create_name(dp, &path); /* Get a segment name of the path */
2229 if (res != FR_OK) break;
2230 res = dir_find(dp); /* Find an object with the sagment name */
2231 ns = dp->fn[NSFLAG];
2232 if (res != FR_OK) { /* Failed to find the object */
2233 if (res == FR_NO_FILE) { /* Object is not found */
2234 if (FF_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, */
2235 dp->sclust = 0; dp->dir = 0; /* it is the root directory and stay there */
2236 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */
2237 res = FR_OK; /* Ended at the root directroy. Function completed. */
2238 } else { /* Could not find the object */
2239 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */
2240 }
2241 }
2242 break;
2243 }
2244 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */
2245 dir = dp->dir; /* Follow the sub-directory */
2246 if (!(dir[DIR_Attr] & AM_DIR)) { /* It is not a sub-directory and cannot follow */
2247 res = FR_NO_PATH; break;
2248 }
2249 dp->sclust = ld_clust(dp->fs, dir);
2250 }
2251 }
2252
2253 return res;
2254}
2255
2256
2257
2258
2259/*-----------------------------------------------------------------------*/
2260/* Get logical drive number from path name */
2261/*-----------------------------------------------------------------------*/
2262
2263static
2264int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */
2265 const TCHAR** path /* Pointer to pointer to the path name */
2266)
2267{
2268 const TCHAR *tp, *tt;
2269 UINT i;
2270 int vol = -1;
2271#if FF_STR_VOLUME_ID /* Find string drive id */
2272 static const char* const str[] = {FF_VOLUME_STRS};
2273 const char *sp;
2274 char c;
2275 TCHAR tc;
2276#endif
2277
2278
2279 if (*path) { /* If the pointer is not a null */
2280 for (tt = *path; (UINT)*tt >= (FF_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find ':' in the path */
2281 if (*tt == ':') { /* If a ':' is exist in the path name */
2282 tp = *path;
2283 i = *tp++ - '0';
2284 if (i < 10 && tp == tt) { /* Is there a numeric drive id? */
2285 if (i < FF_VOLUMES) { /* If a drive id is found, get the value and strip it */
2286 vol = (int)i;
2287 *path = ++tt;
2288 }
2289 }
2290#if FF_STR_VOLUME_ID
2291 else { /* No numeric drive number, find string drive id */
2292 i = 0; tt++;
2293 do {
2294 sp = str[i]; tp = *path;
2295 do { /* Compare a string drive id with path name */
2296 c = *sp++; tc = *tp++;
2297 if (IsLower(tc)) tc -= 0x20;
2298 } while (c && (TCHAR)c == tc);
2299 } while ((c || tp != tt) && ++i < FF_VOLUMES); /* Repeat for each id until pattern match */
2300 if (i < FF_VOLUMES) { /* If a drive id is found, get the value and strip it */
2301 vol = (int)i;
2302 *path = tt;
2303 }
2304 }
2305#endif
2306 return vol;
2307 }
2308#if FF_FS_RPATH && FF_VOLUMES >= 2
2309 vol = CurrVol; /* Current drive */
2310#else
2311 vol = 0; /* Drive 0 */
2312#endif
2313 }
2314 return vol;
2315}
2316
2317
2318
2319
2320/*-----------------------------------------------------------------------*/
2321/* Load a sector and check if it is an FAT boot sector */
2322/*-----------------------------------------------------------------------*/
2323
2324static
2325BYTE check_fs ( /* 0:Valid FAT-BS, 1:Valid BS but not FAT, 2:Not a BS, 3:Disk error */
2326 FATFS* fs, /* File system object */
2327 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
2328)
2329{
2330 fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */
2331 if (move_window(fs, sect) != FR_OK) /* Load boot record */
2332 return 3;
2333
2334 if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */
2335 return 2;
2336
2337 if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
2338 return 0;
2339 if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
2340 return 0;
2341
2342 return 1;
2343}
2344
2345
2346
2347
2348/*-----------------------------------------------------------------------*/
2349/* Find logical drive and check if the volume is mounted */
2350/*-----------------------------------------------------------------------*/
2351
2352static
2353FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */
2354 FATFS** rfs, /* Pointer to pointer to the found file system object */
2355 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
2356 BYTE wmode /* !=0: Check write protection for write access */
2357)
2358{
2359 BYTE fmt, *pt;
2360 int vol;
2361 DSTATUS stat;
2362 DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4];
2363 WORD nrsv;
2364 FATFS *fs;
2365 UINT i;
2366
2367
2368 /* Get logical drive number from the path name */
2369 *rfs = 0;
2370 vol = get_ldnumber(path);
2371 if (vol < 0) return FR_INVALID_DRIVE;
2372
2373 /* Check if the file system object is valid or not */
2374 fs = FatFs[vol]; /* Get pointer to the file system object */
2375 if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
2376
2377 ENTER_FF(fs); /* Lock the volume */
2378 *rfs = fs; /* Return pointer to the file system object */
2379
2380 if (fs->fs_type) { /* If the volume has been mounted */
2381 stat = disk_status(fs->drv);
2382 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */
2383 if (!FF_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */
2384 return FR_WRITE_PROTECTED;
2385 return FR_OK; /* The file system object is valid */
2386 }
2387 }
2388
2389 /* The file system object is not valid. */
2390 /* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
2391
2392 fs->fs_type = 0; /* Clear the file system object */
2393 fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */
2394 stat = disk_initialize(fs->drv); /* Initialize the physical drive */
2395 if (stat & STA_NOINIT) /* Check if the initialization succeeded */
2396 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
2397 if (!FF_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */
2398 return FR_WRITE_PROTECTED;
2399#if FF_MAX_SS != FF_MIN_SS /* Get sector size (multiple sector size cfg only) */
2400 if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
2401 || SS(fs) < FF_MIN_SS || SS(fs) > FF_MAX_SS) return FR_DISK_ERR;
2402#endif
2403 /* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */
2404 bsect = 0;
2405 fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT boot sector as SFD */
2406 if (fmt == 1 || (!fmt && (LD2PT(vol)))) { /* Not an FAT boot sector or forced partition number */
2407 for (i = 0; i < 4; i++) { /* Get partition offset */
2408 pt = fs->win + MBR_Table + i * SZ_PTE;
2409 br[i] = pt[4] ? LD_DWORD(&pt[8]) : 0;
2410 }
2411 i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */
2412 if (i) i--;
2413 do { /* Find an FAT volume */
2414 bsect = br[i];
2415 fmt = bsect ? check_fs(fs, bsect) : 2; /* Check the partition */
2416 } while (!LD2PT(vol) && fmt && ++i < 4);
2417 }
2418 if (fmt == 3) return FR_DISK_ERR; /* An error occured in the disk I/O layer */
2419 if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */
2420
2421 /* An FAT volume is found. Following code initializes the file system object */
2422
2423 if (LD_WORD(fs->win + BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */
2424 return FR_NO_FILESYSTEM;
2425
2426 fasize = LD_WORD(fs->win + BPB_FATSz16); /* Number of sectors per FAT */
2427 if (!fasize) fasize = LD_DWORD(fs->win + BPB_FATSz32);
2428 fs->fsize = fasize;
2429
2430 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */
2431 if (fs->n_fats != 1 && fs->n_fats != 2) /* (Must be 1 or 2) */
2432 return FR_NO_FILESYSTEM;
2433 fasize *= fs->n_fats; /* Number of sectors for FAT area */
2434
2435 fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
2436 if (!fs->csize || (fs->csize & (fs->csize - 1))) /* (Must be power of 2) */
2437 return FR_NO_FILESYSTEM;
2438
2439 fs->n_rootdir = LD_WORD(fs->win + BPB_RootEntCnt); /* Number of root directory entries */
2440 if (fs->n_rootdir % (SS(fs) / SZ_DIRE)) /* (Must be sector aligned) */
2441 return FR_NO_FILESYSTEM;
2442
2443 tsect = LD_WORD(fs->win + BPB_TotSec16); /* Number of sectors on the volume */
2444 if (!tsect) tsect = LD_DWORD(fs->win + BPB_TotSec32);
2445
2446 nrsv = LD_WORD(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */
2447 if (!nrsv) return FR_NO_FILESYSTEM; /* (Must not be 0) */
2448
2449 /* Determine the FAT sub type */
2450 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIRE); /* RSV + FAT + FATFS_DIR */
2451 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
2452 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
2453 if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
2454 fmt = FS_FAT12;
2455 if (nclst >= MIN_FAT16) fmt = FS_FAT16;
2456 if (nclst >= MIN_FAT32) fmt = FS_FAT32;
2457
2458 /* Boundaries and Limits */
2459 fs->n_fatent = nclst + 2; /* Number of FAT entries */
2460 fs->volbase = bsect; /* Volume start sector */
2461 fs->fatbase = bsect + nrsv; /* FAT start sector */
2462 fs->database = bsect + sysect; /* Data start sector */
2463 if (fmt == FS_FAT32) {
2464 if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
2465 fs->dirbase = LD_DWORD(fs->win + BPB_RootClus); /* Root directory start cluster */
2466 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */
2467 } else {
2468 if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
2469 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
2470 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */
2471 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
2472 }
2473 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than the size needed) */
2474 return FR_NO_FILESYSTEM;
2475
2476#if !FF_FS_READONLY
2477 /* Initialize cluster allocation information */
2478 fs->last_clust = fs->free_clust = 0xFFFFFFFF;
2479
2480 /* Get fsinfo if available */
2481 fs->fsi_flag = 0x80;
2482#if (FF_FS_NOFSINFO & 3) != 3
2483 if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo == 1 */
2484 && LD_WORD(fs->win + BPB_FSInfo) == 1
2485 && move_window(fs, bsect + 1) == FR_OK)
2486 {
2487 fs->fsi_flag = 0;
2488 if (LD_WORD(fs->win + BS_55AA) == 0xAA55 /* Load FSINFO data if available */
2489 && LD_DWORD(fs->win + FSI_LeadSig) == 0x41615252
2490 && LD_DWORD(fs->win + FSI_StrucSig) == 0x61417272)
2491 {
2492#if (FF_FS_NOFSINFO & 1) == 0
2493 fs->free_clust = LD_DWORD(fs->win + FSI_Free_Count);
2494#endif
2495#if (FF_FS_NOFSINFO & 2) == 0
2496 fs->last_clust = LD_DWORD(fs->win + FSI_Nxt_Free);
2497#endif
2498 }
2499 }
2500#endif
2501#endif
2502 fs->fs_type = fmt; /* FAT sub-type */
2503 fs->id = ++Fsid; /* File system mount ID */
2504#if FF_FS_RPATH
2505 fs->cdir = 0; /* Set current directory to root */
2506#endif
2507#if FF_FS_LOCK != 0 /* Clear file lock semaphores */
2508 clear_lock(fs);
2509#endif
2510
2511 return FR_OK;
2512}
2513
2514
2515
2516
2517/*-----------------------------------------------------------------------*/
2518/* Check if the file/directory object is valid or not */
2519/*-----------------------------------------------------------------------*/
2520
2521static
2522FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
2523 void* obj /* Pointer to the object FIL/FATFS_DIR to check validity */
2524)
2525{
2526 FIL *fil = (FIL*)obj; /* Assuming offset of .fs and .id in the FIL/FATFS_DIR structure is identical */
2527
2528
2529 if (!fil || !fil->fs || !fil->fs->fs_type || fil->fs->id != fil->id || (disk_status(fil->fs->drv) & STA_NOINIT))
2530 return FR_INVALID_OBJECT;
2531
2532 ENTER_FF(fil->fs); /* Lock file system */
2533
2534 return FR_OK;
2535}
2536
2537
2538
2539
2540/*--------------------------------------------------------------------------
2541
2542 Public Functions
2543
2544---------------------------------------------------------------------------*/
2545
2546
2547
2548/*-----------------------------------------------------------------------*/
2549/* Mount/Unmount a Logical Drive */
2550/*-----------------------------------------------------------------------*/
2551
2552FRESULT f_mount (
2553 FATFS* fs, /* Pointer to the file system object (NULL:unmount)*/
2554 const TCHAR* path, /* Logical drive number to be mounted/unmounted */
2555 BYTE opt /* 0:Do not mount (delayed mount), 1:Mount immediately */
2556)
2557{
2558 FATFS *cfs;
2559 int vol;
2560 FRESULT res;
2561 const TCHAR *rp = path;
2562
2563
2564 vol = get_ldnumber(&rp);
2565 if (vol < 0) return FR_INVALID_DRIVE;
2566 cfs = FatFs[vol]; /* Pointer to fs object */
2567
2568 if (cfs) {
2569#if FF_FS_LOCK != 0
2570 clear_lock(cfs);
2571#endif
2572#if FF_FS_REENTRANT /* Discard sync object of the current volume */
2573 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
2574#endif
2575 cfs->fs_type = 0; /* Clear old fs object */
2576 }
2577
2578 if (fs) {
2579 fs->fs_type = 0; /* Clear new fs object */
2580#if FF_FS_REENTRANT /* Create sync object for the new volume */
2581 if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
2582#endif
2583 }
2584 FatFs[vol] = fs; /* Register new fs object */
2585
2586 if (!fs || opt != 1) return FR_OK; /* Do not mount now, it will be mounted later */
2587
2588 res = find_volume(&fs, &path, 0); /* Force mounted the volume */
2589 LEAVE_FF(fs, res);
2590}
2591
2592
2593
2594
2595/*-----------------------------------------------------------------------*/
2596/* Open or Create a File */
2597/*-----------------------------------------------------------------------*/
2598
2599FRESULT f_open (
2600 FIL* fp, /* Pointer to the blank file object */
2601 const TCHAR* path, /* Pointer to the file name */
2602 BYTE mode /* Access mode and file open mode flags */
2603)
2604{
2605 FRESULT res;
2606 FATFS_DIR dj;
2607 BYTE *dir;
2608 DEFINE_NAMEBUF;
2609#if !FF_FS_READONLY
2610 DWORD dw, cl;
2611#endif
2612
2613
2614 if (!fp) return FR_INVALID_OBJECT;
2615 fp->fs = 0; /* Clear file object */
2616
2617 /* Get logical drive number */
2618#if !FF_FS_READONLY
2619 mode &= FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW | FA_OPEN_APPEND;
2620 res = find_volume(&dj.fs, &path, (BYTE)(mode & ~FA_READ));
2621#else
2622 mode &= FA_READ;
2623 res = find_volume(&dj.fs, &path, 0);
2624#endif
2625 if (res == FR_OK) {
2626 INIT_BUF(dj);
2627 res = follow_path(&dj, path); /* Follow the file path */
2628 dir = dj.dir;
2629#if !FF_FS_READONLY /* R/W configuration */
2630 if (res == FR_OK) {
2631 if (!dir) /* Default directory itself */
2632 res = FR_INVALID_NAME;
2633#if FF_FS_LOCK != 0
2634 else
2635 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2636#endif
2637 }
2638 /* Create or Open a file */
2639 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
2640 if (res != FR_OK) { /* No file, create new */
2641 if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
2642#if FF_FS_LOCK != 0
2643 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
2644#else
2645 res = dir_register(&dj);
2646#endif
2647 mode |= FA_CREATE_ALWAYS; /* File is created */
2648 dir = dj.dir; /* New entry */
2649 }
2650 else { /* Any object is already existing */
2651 if (dir[DIR_Attr] & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or FATFS_DIR) */
2652 res = FR_DENIED;
2653 } else {
2654 if (mode & FA_CREATE_NEW) /* Cannot create as new file */
2655 res = FR_EXIST;
2656 }
2657 }
2658 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */
2659 dw = GET_FATTIME();
2660 ST_DWORD(dir + DIR_CrtTime, dw);/* Set created time */
2661 ST_DWORD(dir + DIR_WrtTime, dw);/* Set modified time */
2662 dir[DIR_Attr] = 0; /* Reset attribute */
2663 ST_DWORD(dir + DIR_FileSize, 0);/* Reset file size */
2664 cl = ld_clust(dj.fs, dir); /* Get cluster chain */
2665 st_clust(dir, 0); /* Reset cluster */
2666 dj.fs->wflag = 1;
2667 if (cl) { /* Remove the cluster chain if exist */
2668 dw = dj.fs->winsect;
2669 res = remove_chain(dj.fs, cl);
2670 if (res == FR_OK) {
2671 dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
2672 res = move_window(dj.fs, dw);
2673 }
2674 }
2675 }
2676 }
2677 else { /* Open an existing file */
2678 if (res == FR_OK) { /* Following succeeded */
2679 if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */
2680 res = FR_NO_FILE;
2681 } else {
2682 if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
2683 res = FR_DENIED;
2684 }
2685 }
2686 }
2687 if (res == FR_OK) {
2688 if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */
2689 mode |= FA_MODIFIED;
2690 fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
2691 fp->dir_ptr = dir;
2692#if FF_FS_LOCK != 0
2693 fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
2694 if (!fp->lockid) res = FR_INT_ERR;
2695#endif
2696 }
2697
2698#else /* R/O configuration */
2699 if (res == FR_OK) { /* Follow succeeded */
2700 dir = dj.dir;
2701 if (!dir) { /* Current directory itself */
2702 res = FR_INVALID_NAME;
2703 } else {
2704 if (dir[DIR_Attr] & AM_DIR) /* It is a directory */
2705 res = FR_NO_FILE;
2706 }
2707 }
2708#endif
2709 FREE_BUF();
2710
2711 if (res == FR_OK) {
2712 fp->flag = mode; /* File access mode */
2713 fp->err = 0; /* Clear error flag */
2714 fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */
2715 fp->fsize = LD_DWORD(dir + DIR_FileSize); /* File size */
2716 fp->fptr = 0; /* File pointer */
2717 fp->dsect = 0;
2718#if FF_USE_FASTSEEK
2719 fp->cltbl = 0; /* Normal seek mode */
2720#endif
2721 fp->fs = dj.fs; /* Validate file object */
2722 fp->id = fp->fs->id;
2723 }
2724 }
2725
2726 LEAVE_FF(dj.fs, res);
2727}
2728
2729
2730
2731
2732/*-----------------------------------------------------------------------*/
2733/* Read File */
2734/*-----------------------------------------------------------------------*/
2735
2736FRESULT f_read (
2737 FIL* fp, /* Pointer to the file object */
2738 void* buff, /* Pointer to data buffer */
2739 UINT btr, /* Number of bytes to read */
2740 UINT* br /* Pointer to number of bytes read */
2741)
2742{
2743 FRESULT res;
2744 DWORD clst, sect, remain;
2745 UINT rcnt, cc;
2746 BYTE csect, *rbuff = (BYTE*)buff;
2747
2748
2749 *br = 0; /* Clear read byte counter */
2750
2751 res = validate(fp); /* Check validity */
2752 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2753 if (fp->err) /* Check error */
2754 LEAVE_FF(fp->fs, (FRESULT)fp->err);
2755 if (!(fp->flag & FA_READ)) /* Check access mode */
2756 LEAVE_FF(fp->fs, FR_DENIED);
2757 remain = fp->fsize - fp->fptr;
2758 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
2759
2760 for ( ; btr; /* Repeat until all data read */
2761 rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
2762 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2763 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
2764 if (!csect) { /* On the cluster boundary? */
2765 if (fp->fptr == 0) { /* On the top of the file? */
2766 clst = fp->sclust; /* Follow from the origin */
2767 } else { /* Middle or end of the file */
2768#if FF_USE_FASTSEEK
2769 if (fp->cltbl)
2770 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
2771 else
2772#endif
2773 clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */
2774 }
2775 if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
2776 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2777 fp->clust = clst; /* Update current cluster */
2778 }
2779 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
2780 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2781 sect += csect;
2782 cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
2783 if (cc) { /* Read maximum contiguous sectors directly */
2784 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2785 cc = fp->fs->csize - csect;
2786 if (disk_read(fp->fs->drv, rbuff, sect, cc) != RES_OK)
2787 ABORT(fp->fs, FR_DISK_ERR);
2788#if !FF_FS_READONLY && FF_FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
2789#if FF_FS_TINY
2790 if (fp->fs->wflag && fp->fs->winsect - sect < cc)
2791 mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
2792#else
2793 if ((fp->flag & FA_DIRTY) && fp->dsect - sect < cc)
2794 mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
2795#endif
2796#endif
2797 rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
2798 continue;
2799 }
2800#if !FF_FS_TINY
2801 if (fp->dsect != sect) { /* Load data sector if not in cache */
2802#if !FF_FS_READONLY
2803 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
2804 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2805 ABORT(fp->fs, FR_DISK_ERR);
2806 fp->flag &= ~FA_DIRTY;
2807 }
2808#endif
2809 if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */
2810 ABORT(fp->fs, FR_DISK_ERR);
2811 }
2812#endif
2813 fp->dsect = sect;
2814 }
2815 rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
2816 if (rcnt > btr) rcnt = btr;
2817#if FF_FS_TINY
2818 if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */
2819 ABORT(fp->fs, FR_DISK_ERR);
2820 mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
2821#else
2822 mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
2823#endif
2824 }
2825
2826 LEAVE_FF(fp->fs, FR_OK);
2827}
2828
2829
2830
2831
2832#if !FF_FS_READONLY
2833/*-----------------------------------------------------------------------*/
2834/* Write File */
2835/*-----------------------------------------------------------------------*/
2836
2837FRESULT f_write (
2838 FIL* fp, /* Pointer to the file object */
2839 const void *buff, /* Pointer to the data to be written */
2840 UINT btw, /* Number of bytes to write */
2841 UINT* bw /* Pointer to number of bytes written */
2842)
2843{
2844 FRESULT res;
2845 DWORD clst, sect;
2846 UINT wcnt, cc;
2847 const BYTE *wbuff = (const BYTE*)buff;
2848 BYTE csect;
2849
2850
2851 *bw = 0; /* Clear write byte counter */
2852
2853 res = validate(fp); /* Check validity */
2854 if (res != FR_OK) LEAVE_FF(fp->fs, res);
2855 if (fp->err) /* Check error */
2856 LEAVE_FF(fp->fs, (FRESULT)fp->err);
2857 if (!(fp->flag & FA_WRITE)) /* Check access mode */
2858 LEAVE_FF(fp->fs, FR_DENIED);
2859 if (fp->fptr + btw < fp->fptr) btw = 0; /* File size cannot reach 4GB */
2860
2861 for ( ; btw; /* Repeat until all data written */
2862 wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
2863 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
2864 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
2865 if (!csect) { /* On the cluster boundary? */
2866 if (fp->fptr == 0) { /* On the top of the file? */
2867 clst = fp->sclust; /* Follow from the origin */
2868 if (clst == 0) /* When no cluster is allocated, */
2869 clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
2870 } else { /* Middle or end of the file */
2871#if FF_USE_FASTSEEK
2872 if (fp->cltbl)
2873 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
2874 else
2875#endif
2876 clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */
2877 }
2878 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
2879 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
2880 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
2881 fp->clust = clst; /* Update current cluster */
2882 if (fp->sclust == 0) fp->sclust = clst; /* Set start cluster if the first write */
2883 }
2884#if FF_FS_TINY
2885 if (fp->fs->winsect == fp->dsect && sync_window(fp->fs)) /* Write-back sector cache */
2886 ABORT(fp->fs, FR_DISK_ERR);
2887#else
2888 if (fp->flag & FA_DIRTY) { /* Write-back sector cache */
2889 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2890 ABORT(fp->fs, FR_DISK_ERR);
2891 fp->flag &= ~FA_DIRTY;
2892 }
2893#endif
2894 sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
2895 if (!sect) ABORT(fp->fs, FR_INT_ERR);
2896 sect += csect;
2897 cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
2898 if (cc) { /* Write maximum contiguous sectors directly */
2899 if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
2900 cc = fp->fs->csize - csect;
2901 if (disk_write(fp->fs->drv, wbuff, sect, cc) != RES_OK)
2902 ABORT(fp->fs, FR_DISK_ERR);
2903#if FF_FS_MINIMIZE <= 2
2904#if FF_FS_TINY
2905 if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2906 mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
2907 fp->fs->wflag = 0;
2908 }
2909#else
2910 if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
2911 mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
2912 fp->flag &= ~FA_DIRTY;
2913 }
2914#endif
2915#endif
2916 wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
2917 continue;
2918 }
2919#if FF_FS_TINY
2920 if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */
2921 if (sync_window(fp->fs)) ABORT(fp->fs, FR_DISK_ERR);
2922 fp->fs->winsect = sect;
2923 }
2924#else
2925 if (fp->dsect != sect) { /* Fill sector cache with file data */
2926 if (fp->fptr < fp->fsize &&
2927 disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
2928 ABORT(fp->fs, FR_DISK_ERR);
2929 }
2930#endif
2931 fp->dsect = sect;
2932 }
2933 wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
2934 if (wcnt > btw) wcnt = btw;
2935#if FF_FS_TINY
2936 if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */
2937 ABORT(fp->fs, FR_DISK_ERR);
2938 mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
2939 fp->fs->wflag = 1;
2940#else
2941 mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
2942 fp->flag |= FA_DIRTY;
2943#endif
2944 }
2945
2946 if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
2947 fp->flag |= FA_MODIFIED; /* Set file change flag */
2948
2949 LEAVE_FF(fp->fs, FR_OK);
2950}
2951
2952
2953
2954
2955/*-----------------------------------------------------------------------*/
2956/* Synchronize the File */
2957/*-----------------------------------------------------------------------*/
2958
2959FRESULT f_sync (
2960 FIL* fp /* Pointer to the file object */
2961)
2962{
2963 FRESULT res;
2964 DWORD tm;
2965 BYTE *dir;
2966
2967
2968 res = validate(fp); /* Check validity of the object */
2969 if (res == FR_OK) {
2970 if (fp->flag & FA_MODIFIED) { /* Is there any change to the file? */
2971#if !FF_FS_TINY
2972 if (fp->flag & FA_DIRTY) { /* Write-back cached data if needed */
2973 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
2974 LEAVE_FF(fp->fs, FR_DISK_ERR);
2975 fp->flag &= ~FA_DIRTY;
2976 }
2977#endif
2978 /* Update the directory entry */
2979 res = move_window(fp->fs, fp->dir_sect);
2980 if (res == FR_OK) {
2981 dir = fp->dir_ptr;
2982 dir[DIR_Attr] |= AM_ARC; /* Set archive bit */
2983 ST_DWORD(dir + DIR_FileSize, fp->fsize); /* Update file size */
2984 st_clust(dir, fp->sclust); /* Update start cluster */
2985 tm = GET_FATTIME(); /* Update modified time */
2986 ST_DWORD(dir + DIR_WrtTime, tm);
2987 ST_WORD(dir + DIR_LstAccDate, 0);
2988 fp->flag &= ~FA_MODIFIED;
2989 fp->fs->wflag = 1;
2990 res = sync_fs(fp->fs);
2991 }
2992 }
2993 }
2994
2995 LEAVE_FF(fp->fs, res);
2996}
2997
2998#endif /* !FF_FS_READONLY */
2999
3000
3001
3002
3003/*-----------------------------------------------------------------------*/
3004/* Close File */
3005/*-----------------------------------------------------------------------*/
3006
3007FRESULT f_close (
3008 FIL *fp /* Pointer to the file object to be closed */
3009)
3010{
3011 FRESULT res;
3012
3013
3014#if !FF_FS_READONLY
3015 res = f_sync(fp); /* Flush cached data */
3016 if (res == FR_OK)
3017#endif
3018 {
3019 res = validate(fp); /* Lock volume */
3020 if (res == FR_OK) {
3021#if FF_FS_REENTRANT
3022 FATFS *fs = fp->fs;
3023#endif
3024#if FF_FS_LOCK != 0
3025 res = dec_lock(fp->lockid); /* Decrement file open counter */
3026 if (res == FR_OK)
3027#endif
3028 fp->fs = 0; /* Invalidate file object */
3029#if FF_FS_REENTRANT
3030 unlock_fs(fs, FR_OK); /* Unlock volume */
3031#endif
3032 }
3033 }
3034 return res;
3035}
3036
3037
3038
3039
3040/*-----------------------------------------------------------------------*/
3041/* Change Current Directory or Current Drive, Get Current Directory */
3042/*-----------------------------------------------------------------------*/
3043
3044#if FF_FS_RPATH >= 1
3045#if FF_VOLUMES >= 2
3046FRESULT f_chdrive (
3047 const TCHAR* path /* Drive number */
3048)
3049{
3050 int vol;
3051
3052
3053 vol = get_ldnumber(&path);
3054 if (vol < 0) return FR_INVALID_DRIVE;
3055
3056 CurrVol = (BYTE)vol;
3057
3058 return FR_OK;
3059}
3060#endif
3061
3062
3063FRESULT f_chdir (
3064 const TCHAR* path /* Pointer to the directory path */
3065)
3066{
3067 FRESULT res;
3068 FATFS_DIR dj;
3069 DEFINE_NAMEBUF;
3070
3071
3072 /* Get logical drive number */
3073 res = find_volume(&dj.fs, &path, 0);
3074 if (res == FR_OK) {
3075 INIT_BUF(dj);
3076 res = follow_path(&dj, path); /* Follow the path */
3077 FREE_BUF();
3078 if (res == FR_OK) { /* Follow completed */
3079 if (!dj.dir) {
3080 dj.fs->cdir = dj.sclust; /* Start directory itself */
3081 } else {
3082 if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */
3083 dj.fs->cdir = ld_clust(dj.fs, dj.dir);
3084 else
3085 res = FR_NO_PATH; /* Reached but a file */
3086 }
3087 }
3088 if (res == FR_NO_FILE) res = FR_NO_PATH;
3089 }
3090
3091 LEAVE_FF(dj.fs, res);
3092}
3093
3094
3095#if FF_FS_RPATH >= 2
3096FRESULT f_getcwd (
3097 TCHAR* buff, /* Pointer to the directory path */
3098 UINT len /* Size of path */
3099)
3100{
3101 FRESULT res;
3102 FATFS_DIR dj;
3103 UINT i, n;
3104 DWORD ccl;
3105 TCHAR *tp;
3106 FILINFO fno;
3107 DEFINE_NAMEBUF;
3108
3109
3110 *buff = 0;
3111 /* Get logical drive number */
3112 res = find_volume(&dj.fs, (const TCHAR**)&buff, 0); /* Get current volume */
3113 if (res == FR_OK) {
3114 INIT_BUF(dj);
3115 i = len; /* Bottom of buffer (directory stack base) */
3116 dj.sclust = dj.fs->cdir; /* Start to follow upper directory from current directory */
3117 while ((ccl = dj.sclust) != 0) { /* Repeat while current directory is a sub-directory */
3118 res = dir_sdi(&dj, 1); /* Get parent directory */
3119 if (res != FR_OK) break;
3120 res = dir_read(&dj, 0);
3121 if (res != FR_OK) break;
3122 dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent directory */
3123 res = dir_sdi(&dj, 0);
3124 if (res != FR_OK) break;
3125 do { /* Find the entry links to the child directory */
3126 res = dir_read(&dj, 0);
3127 if (res != FR_OK) break;
3128 if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */
3129 res = dir_next(&dj, 0);
3130 } while (res == FR_OK);
3131 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
3132 if (res != FR_OK) break;
3133#if FF_USE_LFN
3134 fno.lfname = buff;
3135 fno.lfsize = i;
3136#endif
3137 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */
3138 tp = fno.fname;
3139#if FF_USE_LFN
3140 if (*buff) tp = buff;
3141#endif
3142 for (n = 0; tp[n]; n++) ;
3143 if (i < n + 3) {
3144 res = FR_NOT_ENOUGH_CORE; break;
3145 }
3146 while (n) buff[--i] = tp[--n];
3147 buff[--i] = '/';
3148 }
3149 tp = buff;
3150 if (res == FR_OK) {
3151#if FF_VOLUMES >= 2
3152 *tp++ = '0' + CurrVol; /* Put drive number */
3153 *tp++ = ':';
3154#endif
3155 if (i == len) { /* Root-directory */
3156 *tp++ = '/';
3157 } else { /* Sub-directroy */
3158 do /* Add stacked path str */
3159 *tp++ = buff[i++];
3160 while (i < len);
3161 }
3162 }
3163 *tp = 0;
3164 FREE_BUF();
3165 }
3166
3167 LEAVE_FF(dj.fs, res);
3168}
3169#endif /* FF_FS_RPATH >= 2 */
3170#endif /* FF_FS_RPATH >= 1 */
3171
3172
3173
3174#if FF_FS_MINIMIZE <= 2
3175/*-----------------------------------------------------------------------*/
3176/* Seek File R/W Pointer */
3177/*-----------------------------------------------------------------------*/
3178
3179FRESULT f_lseek (
3180 FIL* fp, /* Pointer to the file object */
3181 DWORD ofs /* File pointer from top of file */
3182)
3183{
3184 FRESULT res;
3185 DWORD clst, bcs, nsect, ifptr;
3186#if FF_USE_FASTSEEK
3187 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
3188#endif
3189
3190
3191 res = validate(fp); /* Check validity of the object */
3192 if (res != FR_OK) LEAVE_FF(fp->fs, res);
3193 if (fp->err) /* Check error */
3194 LEAVE_FF(fp->fs, (FRESULT)fp->err);
3195
3196#if FF_USE_FASTSEEK
3197 if (fp->cltbl) { /* Fast seek */
3198 if (ofs == CREATE_LINKMAP) { /* Create CLMT */
3199 tbl = fp->cltbl;
3200 tlen = *tbl++; ulen = 2; /* Given table size and required table size */
3201 cl = fp->sclust; /* Top of the chain */
3202 if (cl) {
3203 do {
3204 /* Get a fragment */
3205 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
3206 do {
3207 pcl = cl; ncl++;
3208 cl = get_fat(fp->fs, cl);
3209 if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
3210 if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3211 } while (cl == pcl + 1);
3212 if (ulen <= tlen) { /* Store the length and top of the fragment */
3213 *tbl++ = ncl; *tbl++ = tcl;
3214 }
3215 } while (cl < fp->fs->n_fatent); /* Repeat until end of chain */
3216 }
3217 *fp->cltbl = ulen; /* Number of items used */
3218 if (ulen <= tlen)
3219 *tbl = 0; /* Terminate table */
3220 else
3221 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
3222
3223 } else { /* Fast seek */
3224 if (ofs > fp->fsize) /* Clip offset at the file size */
3225 ofs = fp->fsize;
3226 fp->fptr = ofs; /* Set file pointer */
3227 if (ofs) {
3228 fp->clust = clmt_clust(fp, ofs - 1);
3229 dsc = clust2sect(fp->fs, fp->clust);
3230 if (!dsc) ABORT(fp->fs, FR_INT_ERR);
3231 dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
3232 if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */
3233#if !FF_FS_TINY
3234#if !FF_FS_READONLY
3235 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
3236 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
3237 ABORT(fp->fs, FR_DISK_ERR);
3238 fp->flag &= ~FA_DIRTY;
3239 }
3240#endif
3241 if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */
3242 ABORT(fp->fs, FR_DISK_ERR);
3243#endif
3244 fp->dsect = dsc;
3245 }
3246 }
3247 }
3248 } else
3249#endif
3250
3251 /* Normal Seek */
3252 {
3253 if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
3254#if !FF_FS_READONLY
3255 && !(fp->flag & FA_WRITE)
3256#endif
3257 ) ofs = fp->fsize;
3258
3259 ifptr = fp->fptr;
3260 fp->fptr = nsect = 0;
3261 if (ofs) {
3262 bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
3263 if (ifptr > 0 &&
3264 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
3265 fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
3266 ofs -= fp->fptr;
3267 clst = fp->clust;
3268 } else { /* When seek to back cluster, */
3269 clst = fp->sclust; /* start from the first cluster */
3270#if !FF_FS_READONLY
3271 if (clst == 0) { /* If no cluster chain, create a new chain */
3272 clst = create_chain(fp->fs, 0);
3273 if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
3274 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3275 fp->sclust = clst;
3276 }
3277#endif
3278 fp->clust = clst;
3279 }
3280 if (clst != 0) {
3281 while (ofs > bcs) { /* Cluster following loop */
3282#if !FF_FS_READONLY
3283 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
3284 clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */
3285 if (clst == 0) { /* When disk gets full, clip file size */
3286 ofs = bcs; break;
3287 }
3288 } else
3289#endif
3290 clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
3291 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
3292 if (clst <= 1 || clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
3293 fp->clust = clst;
3294 fp->fptr += bcs;
3295 ofs -= bcs;
3296 }
3297 fp->fptr += ofs;
3298 if (ofs % SS(fp->fs)) {
3299 nsect = clust2sect(fp->fs, clst); /* Current sector */
3300 if (!nsect) ABORT(fp->fs, FR_INT_ERR);
3301 nsect += ofs / SS(fp->fs);
3302 }
3303 }
3304 }
3305 if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */
3306#if !FF_FS_TINY
3307#if !FF_FS_READONLY
3308 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
3309 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
3310 ABORT(fp->fs, FR_DISK_ERR);
3311 fp->flag &= ~FA_DIRTY;
3312 }
3313#endif
3314 if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */
3315 ABORT(fp->fs, FR_DISK_ERR);
3316#endif
3317 fp->dsect = nsect;
3318 }
3319#if !FF_FS_READONLY
3320 if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */
3321 fp->fsize = fp->fptr;
3322 fp->flag |= FA_MODIFIED;
3323 }
3324#endif
3325 }
3326
3327 LEAVE_FF(fp->fs, res);
3328}
3329
3330FRESULT f_seek(FIL* fp, DWORD ofs, BYTE mode)
3331{
3332 switch (mode) {
3333 case F_SEEK_SET:
3334 return f_lseek((fp), ofs);
3335 case F_SEEK_CUR:
3336 return f_lseek((fp), (fp)->fptr + ofs);
3337 case F_SEEK_END:
3338 return f_lseek((fp), (fp)->fsize - ofs);
3339 default:
3340 return FR_INVALID_PARAMETER;
3341 }
3342}
3343
3344#if FF_FS_MINIMIZE <= 1
3345/*-----------------------------------------------------------------------*/
3346/* Create a Directory Object */
3347/*-----------------------------------------------------------------------*/
3348
3349FRESULT f_opendir (
3350 FATFS_DIR* dp, /* Pointer to directory object to create */
3351 const TCHAR* path /* Pointer to the directory path */
3352)
3353{
3354 FRESULT res;
3355 FATFS* fs;
3356 DEFINE_NAMEBUF;
3357
3358
3359 if (!dp) return FR_INVALID_OBJECT;
3360
3361 /* Get logical drive number */
3362 res = find_volume(&fs, &path, 0);
3363 if (res == FR_OK) {
3364 dp->fs = fs;
3365 INIT_BUF(*dp);
3366 res = follow_path(dp, path); /* Follow the path to the directory */
3367 FREE_BUF();
3368 if (res == FR_OK) { /* Follow completed */
3369 if (dp->dir) { /* It is not the origin directory itself */
3370 if (dp->dir[DIR_Attr] & AM_DIR) /* The object is a sub directory */
3371 dp->sclust = ld_clust(fs, dp->dir);
3372 else /* The object is a file */
3373 res = FR_NO_PATH;
3374 }
3375 if (res == FR_OK) {
3376 dp->id = fs->id;
3377 res = dir_sdi(dp, 0); /* Rewind directory */
3378#if FF_FS_LOCK != 0
3379 if (res == FR_OK) {
3380 if (dp->sclust) {
3381 dp->lockid = inc_lock(dp, 0); /* Lock the sub directory */
3382 if (!dp->lockid)
3383 res = FR_TOO_MANY_OPEN_FILES;
3384 } else {
3385 dp->lockid = 0; /* Root directory need not to be locked */
3386 }
3387 }
3388#endif
3389 }
3390 }
3391 if (res == FR_NO_FILE) res = FR_NO_PATH;
3392 }
3393 if (res != FR_OK) dp->fs = 0; /* Invalidate the directory object if function faild */
3394
3395 LEAVE_FF(fs, res);
3396}
3397
3398
3399
3400
3401/*-----------------------------------------------------------------------*/
3402/* Close Directory */
3403/*-----------------------------------------------------------------------*/
3404
3405FRESULT f_closedir (
3406 FATFS_DIR *dp /* Pointer to the directory object to be closed */
3407)
3408{
3409 FRESULT res;
3410
3411
3412 res = validate(dp);
3413 if (res == FR_OK) {
3414#if FF_FS_REENTRANT
3415 FATFS *fs = dp->fs;
3416#endif
3417#if FF_FS_LOCK != 0
3418 if (dp->lockid) /* Decrement sub-directory open counter */
3419 res = dec_lock(dp->lockid);
3420 if (res == FR_OK)
3421#endif
3422 dp->fs = 0; /* Invalidate directory object */
3423#if FF_FS_REENTRANT
3424 unlock_fs(fs, FR_OK); /* Unlock volume */
3425#endif
3426 }
3427 return res;
3428}
3429
3430
3431
3432
3433/*-----------------------------------------------------------------------*/
3434/* Read Directory Entries in Sequence */
3435/*-----------------------------------------------------------------------*/
3436
3437FRESULT f_readdir (
3438 FATFS_DIR* dp, /* Pointer to the open directory object */
3439 FILINFO* fno /* Pointer to file information to return */
3440)
3441{
3442 FRESULT res;
3443 DEFINE_NAMEBUF;
3444
3445
3446 res = validate(dp); /* Check validity of the object */
3447 if (res == FR_OK) {
3448 if (!fno) {
3449 res = dir_sdi(dp, 0); /* Rewind the directory object */
3450 } else {
3451 INIT_BUF(*dp);
3452 res = dir_read(dp, 0); /* Read an item */
3453 if (res == FR_NO_FILE) { /* Reached end of directory */
3454 dp->sect = 0;
3455 res = FR_OK;
3456 }
3457 if (res == FR_OK) { /* A valid entry is found */
3458 get_fileinfo(dp, fno); /* Get the object information */
3459 res = dir_next(dp, 0); /* Increment index for next */
3460 if (res == FR_NO_FILE) {
3461 dp->sect = 0;
3462 res = FR_OK;
3463 }
3464 }
3465 FREE_BUF();
3466 }
3467 }
3468
3469 LEAVE_FF(dp->fs, res);
3470}
3471
3472
3473
3474#if FF_USE_FIND
3475/*-----------------------------------------------------------------------*/
3476/* Find next file */
3477/*-----------------------------------------------------------------------*/
3478
3479FRESULT f_findnext (
3480 FATFS_DIR* dp, /* Pointer to the open directory object */
3481 FILINFO* fno /* Pointer to the file information structure */
3482)
3483{
3484 FRESULT res;
3485
3486
3487 for (;;) {
3488 res = f_readdir(dp, fno); /* Get a directory item */
3489 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */
3490#if FF_USE_LFN
3491 if (fno->lfname && pattern_matching(dp->pat, fno->lfname, 0, 0)) break; /* Test for LFN if exist */
3492#endif
3493 if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for SFN */
3494 }
3495 return res;
3496
3497}
3498
3499
3500
3501/*-----------------------------------------------------------------------*/
3502/* Find first file */
3503/*-----------------------------------------------------------------------*/
3504
3505FRESULT f_findfirst (
3506 FATFS_DIR* dp, /* Pointer to the blank directory object */
3507 FILINFO* fno, /* Pointer to the file information structure */
3508 const TCHAR* path, /* Pointer to the directory to open */
3509 const TCHAR* pattern /* Pointer to the matching pattern */
3510)
3511{
3512 FRESULT res;
3513
3514
3515 dp->pat = pattern; /* Save pointer to pattern string */
3516 res = f_opendir(dp, path); /* Open the target directory */
3517 if (res == FR_OK)
3518 res = f_findnext(dp, fno); /* Find the first item */
3519 return res;
3520}
3521
3522#endif /* FF_USE_FIND */
3523
3524
3525
3526#if FF_FS_MINIMIZE == 0
3527/*-----------------------------------------------------------------------*/
3528/* Get File Status */
3529/*-----------------------------------------------------------------------*/
3530
3531FRESULT f_stat (
3532 const TCHAR* path, /* Pointer to the file path */
3533 FILINFO* fno /* Pointer to file information to return */
3534)
3535{
3536 FRESULT res;
3537 FATFS_DIR dj;
3538 DEFINE_NAMEBUF;
3539
3540
3541 /* Get logical drive number */
3542 res = find_volume(&dj.fs, &path, 0);
3543 if (res == FR_OK) {
3544 INIT_BUF(dj);
3545 res = follow_path(&dj, path); /* Follow the file path */
3546 if (res == FR_OK) { /* Follow completed */
3547 if (dj.dir) { /* Found an object */
3548 if (fno) get_fileinfo(&dj, fno);
3549 } else { /* It is root directory */
3550 res = FR_INVALID_NAME;
3551 }
3552 }
3553 FREE_BUF();
3554 }
3555
3556 LEAVE_FF(dj.fs, res);
3557}
3558
3559
3560
3561#if !FF_FS_READONLY
3562/*-----------------------------------------------------------------------*/
3563/* Get Number of Free Clusters */
3564/*-----------------------------------------------------------------------*/
3565
3566FRESULT f_getfree (
3567 const TCHAR* path, /* Path name of the logical drive number */
3568 DWORD* nclst, /* Pointer to a variable to return number of free clusters */
3569 FATFS** fatfs /* Pointer to return pointer to corresponding file system object */
3570)
3571{
3572 FRESULT res;
3573 FATFS *fs;
3574 DWORD nfree, clst, sect, stat;
3575 UINT i;
3576 BYTE fat, *p;
3577
3578
3579 /* Get logical drive number */
3580 res = find_volume(fatfs, &path, 0);
3581 fs = *fatfs;
3582 if (res == FR_OK) {
3583 /* If free_clust is valid, return it without full cluster scan */
3584 if (fs->free_clust <= fs->n_fatent - 2) {
3585 *nclst = fs->free_clust;
3586 } else {
3587 /* Get number of free clusters */
3588 fat = fs->fs_type;
3589 nfree = 0;
3590 if (fat == FS_FAT12) { /* Sector unalighed entries: Search FAT via regular routine. */
3591 clst = 2;
3592 do {
3593 stat = get_fat(fs, clst);
3594 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
3595 if (stat == 1) { res = FR_INT_ERR; break; }
3596 if (stat == 0) nfree++;
3597 } while (++clst < fs->n_fatent);
3598 } else { /* Sector alighed entries: Accelerate the FAT search. */
3599 clst = fs->n_fatent; sect = fs->fatbase;
3600 i = 0; p = 0;
3601 do {
3602 if (!i) {
3603 res = move_window(fs, sect++);
3604 if (res != FR_OK) break;
3605 p = fs->win;
3606 i = SS(fs);
3607 }
3608 if (fat == FS_FAT16) {
3609 if (LD_WORD(p) == 0) nfree++;
3610 p += 2; i -= 2;
3611 } else {
3612 if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) nfree++;
3613 p += 4; i -= 4;
3614 }
3615 } while (--clst);
3616 }
3617 fs->free_clust = nfree; /* free_clust is valid */
3618 fs->fsi_flag |= 1; /* FSInfo is to be updated */
3619 *nclst = nfree; /* Return the free clusters */
3620 }
3621 }
3622 LEAVE_FF(fs, res);
3623}
3624
3625
3626
3627
3628/*-----------------------------------------------------------------------*/
3629/* Truncate File */
3630/*-----------------------------------------------------------------------*/
3631
3632FRESULT f_truncate (
3633 FIL* fp /* Pointer to the file object */
3634)
3635{
3636 FRESULT res;
3637 DWORD ncl;
3638
3639
3640 res = validate(fp); /* Check validity of the object */
3641 if (res == FR_OK) {
3642 if (fp->err) { /* Check error */
3643 res = (FRESULT)fp->err;
3644 } else {
3645 if (!(fp->flag & FA_WRITE)) /* Check access mode */
3646 res = FR_DENIED;
3647 }
3648 }
3649 if (res == FR_OK) {
3650 if (fp->fsize > fp->fptr) {
3651 fp->fsize = fp->fptr; /* Set file size to current R/W point */
3652 fp->flag |= FA_MODIFIED;
3653 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
3654 res = remove_chain(fp->fs, fp->sclust);
3655 fp->sclust = 0;
3656 } else { /* When truncate a part of the file, remove remaining clusters */
3657 ncl = get_fat(fp->fs, fp->clust);
3658 res = FR_OK;
3659 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
3660 if (ncl == 1) res = FR_INT_ERR;
3661 if (res == FR_OK && ncl < fp->fs->n_fatent) {
3662 res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF);
3663 if (res == FR_OK) res = remove_chain(fp->fs, ncl);
3664 }
3665 }
3666#if !FF_FS_TINY
3667 if (res == FR_OK && (fp->flag & FA_DIRTY)) {
3668 if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
3669 res = FR_DISK_ERR;
3670 else
3671 fp->flag &= ~FA_DIRTY;
3672 }
3673#endif
3674 }
3675 if (res != FR_OK) fp->err = (FRESULT)res;
3676 }
3677
3678 LEAVE_FF(fp->fs, res);
3679}
3680
3681
3682
3683
3684/*-----------------------------------------------------------------------*/
3685/* Delete a File or Directory */
3686/*-----------------------------------------------------------------------*/
3687
3688FRESULT f_unlink (
3689 const TCHAR* path /* Pointer to the file or directory path */
3690)
3691{
3692 FRESULT res;
3693 FATFS_DIR dj, sdj;
3694 BYTE *dir;
3695 DWORD dclst = 0;
3696 DEFINE_NAMEBUF;
3697
3698
3699 /* Get logical drive number */
3700 res = find_volume(&dj.fs, &path, 1);
3701 if (res == FR_OK) {
3702 INIT_BUF(dj);
3703 res = follow_path(&dj, path); /* Follow the file path */
3704 if (FF_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
3705 res = FR_INVALID_NAME; /* Cannot remove dot entry */
3706#if FF_FS_LOCK != 0
3707 if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open object */
3708#endif
3709 if (res == FR_OK) { /* The object is accessible */
3710 dir = dj.dir;
3711 if (!dir) {
3712 res = FR_INVALID_NAME; /* Cannot remove the origin directory */
3713 } else {
3714 if (dir[DIR_Attr] & AM_RDO)
3715 res = FR_DENIED; /* Cannot remove R/O object */
3716 }
3717 if (res == FR_OK) {
3718 dclst = ld_clust(dj.fs, dir);
3719 if (dclst && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-directory ? */
3720#if FF_FS_RPATH
3721 if (dclst == dj.fs->cdir) { /* Is it the current directory? */
3722 res = FR_DENIED;
3723 } else
3724#endif
3725 {
3726 mem_cpy(&sdj, &dj, sizeof (FATFS_DIR)); /* Open the sub-directory */
3727 sdj.sclust = dclst;
3728 res = dir_sdi(&sdj, 2);
3729 if (res == FR_OK) {
3730 res = dir_read(&sdj, 0); /* Read an item (excluding dot entries) */
3731 if (res == FR_OK) res = FR_DENIED; /* Not empty? (cannot remove) */
3732 if (res == FR_NO_FILE) res = FR_OK; /* Empty? (can remove) */
3733 }
3734 }
3735 }
3736 }
3737 if (res == FR_OK) {
3738 res = dir_remove(&dj); /* Remove the directory entry */
3739 if (res == FR_OK && dclst) /* Remove the cluster chain if exist */
3740 res = remove_chain(dj.fs, dclst);
3741 if (res == FR_OK) res = sync_fs(dj.fs);
3742 }
3743 }
3744 FREE_BUF();
3745 }
3746
3747 LEAVE_FF(dj.fs, res);
3748}
3749
3750
3751
3752
3753/*-----------------------------------------------------------------------*/
3754/* Create a Directory */
3755/*-----------------------------------------------------------------------*/
3756
3757FRESULT f_mkdir (
3758 const TCHAR* path /* Pointer to the directory path */
3759)
3760{
3761 FRESULT res;
3762 FATFS_DIR dj;
3763 BYTE *dir, n;
3764 DWORD dsc, dcl, pcl, tm = GET_FATTIME();
3765 DEFINE_NAMEBUF;
3766
3767
3768 /* Get logical drive number */
3769 res = find_volume(&dj.fs, &path, 1);
3770 if (res == FR_OK) {
3771 INIT_BUF(dj);
3772 res = follow_path(&dj, path); /* Follow the file path */
3773 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */
3774 if (FF_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT))
3775 res = FR_INVALID_NAME;
3776 if (res == FR_NO_FILE) { /* Can create a new directory */
3777 dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */
3778 res = FR_OK;
3779 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */
3780 if (dcl == 1) res = FR_INT_ERR;
3781 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
3782 if (res == FR_OK) /* Flush FAT */
3783 res = sync_window(dj.fs);
3784 if (res == FR_OK) { /* Initialize the new directory table */
3785 dsc = clust2sect(dj.fs, dcl);
3786 dir = dj.fs->win;
3787 mem_set(dir, 0, SS(dj.fs));
3788 mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */
3789 dir[DIR_Name] = '.';
3790 dir[DIR_Attr] = AM_DIR;
3791 ST_DWORD(dir + DIR_WrtTime, tm);
3792 st_clust(dir, dcl);
3793 mem_cpy(dir + SZ_DIRE, dir, SZ_DIRE); /* Create ".." entry */
3794 dir[SZ_DIRE + 1] = '.'; pcl = dj.sclust;
3795 if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
3796 pcl = 0;
3797 st_clust(dir + SZ_DIRE, pcl);
3798 for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */
3799 dj.fs->winsect = dsc++;
3800 dj.fs->wflag = 1;
3801 res = sync_window(dj.fs);
3802 if (res != FR_OK) break;
3803 mem_set(dir, 0, SS(dj.fs));
3804 }
3805 }
3806 if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */
3807 if (res != FR_OK) {
3808 remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */
3809 } else {
3810 dir = dj.dir;
3811 dir[DIR_Attr] = AM_DIR; /* Attribute */
3812 ST_DWORD(dir + DIR_WrtTime, tm); /* Created time */
3813 st_clust(dir, dcl); /* Table start cluster */
3814 dj.fs->wflag = 1;
3815 res = sync_fs(dj.fs);
3816 }
3817 }
3818 FREE_BUF();
3819 }
3820
3821 LEAVE_FF(dj.fs, res);
3822}
3823
3824
3825
3826
3827/*-----------------------------------------------------------------------*/
3828/* Change Attribute */
3829/*-----------------------------------------------------------------------*/
3830
3831FRESULT f_chmod (
3832 const TCHAR* path, /* Pointer to the file path */
3833 BYTE attr, /* Attribute bits */
3834 BYTE mask /* Attribute mask to change */
3835)
3836{
3837 FRESULT res;
3838 FATFS_DIR dj;
3839 BYTE *dir;
3840 DEFINE_NAMEBUF;
3841
3842
3843 res = find_volume(&dj.fs, &path, 1); /* Get logical drive number */
3844 if (res == FR_OK) {
3845 INIT_BUF(dj);
3846 res = follow_path(&dj, path); /* Follow the file path */
3847 FREE_BUF();
3848 if (FF_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
3849 res = FR_INVALID_NAME;
3850 if (res == FR_OK) {
3851 dir = dj.dir;
3852 if (!dir) { /* Is it a root directory? */
3853 res = FR_INVALID_NAME;
3854 } else { /* File or sub directory */
3855 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
3856 dir[DIR_Attr] = (attr & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
3857 dj.fs->wflag = 1;
3858 res = sync_fs(dj.fs);
3859 }
3860 }
3861 }
3862
3863 LEAVE_FF(dj.fs, res);
3864}
3865
3866
3867
3868
3869/*-----------------------------------------------------------------------*/
3870/* Rename File/Directory */
3871/*-----------------------------------------------------------------------*/
3872
3873FRESULT f_rename (
3874 const TCHAR* path_old, /* Pointer to the object to be renamed */
3875 const TCHAR* path_new /* Pointer to the new name */
3876)
3877{
3878 FRESULT res;
3879 FATFS_DIR djo, djn;
3880 BYTE buf[21], *dir;
3881 DWORD dw;
3882 DEFINE_NAMEBUF;
3883 TCHAR *temp_new_path = 0;
3884
3885
3886 /* Get logical drive number of the source object */
3887 res = find_volume(&djo.fs, &path_old, 1);
3888 if (res == FR_OK) {
3889 djn.fs = djo.fs;
3890 INIT_BUF(djo);
3891 res = follow_path(&djo, path_old); /* Check old object */
3892 if (FF_FS_RPATH && res == FR_OK && (djo.fn[NSFLAG] & NS_DOT))
3893 res = FR_INVALID_NAME;
3894#if FF_FS_LOCK != 0
3895 if (res == FR_OK) res = chk_lock(&djo, 2);
3896#endif
3897 if (res == FR_OK) { /* Old object is found */
3898 if (!djo.dir) { /* Is root dir? */
3899 res = FR_NO_FILE;
3900 } else {
3901 mem_cpy(buf, djo.dir + DIR_Attr, 21); /* Save information about object except name */
3902 mem_cpy(&djn, &djo, sizeof (FATFS_DIR)); /* Duplicate the directory object */
3903 if (get_ldnumber(&path_new) >= 0) /* Snip drive number off and ignore it */
3904 res = follow_path(&djn, path_new); /* and make sure if new object name is not conflicting */
3905 else
3906 res = FR_INVALID_DRIVE;
3907 if (res == FR_OK) {
3908 res = FR_EXIST; /* The new object name is already existing */
3909 dir = djn.dir;
3910 if (dir[DIR_Attr] & AM_DIR) { /* The new object is a directory */
3911 temp_new_path = (TCHAR *)ff_memalloc((FF_MAX_LFN + 1) * sizeof(WCHAR));
3912 snprintf(temp_new_path, FF_MAX_LFN, "%s/%s", path_new, basename((char *)path_old));
3913 res = follow_path(&djn, temp_new_path);
3914 }
3915 }
3916 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
3917 res = dir_register(&djn); /* Register the new entry */
3918 if (res == FR_OK) {
3919/* Start of critical section where any interruption can cause a cross-link */
3920 dir = djn.dir; /* Copy information about object except name */
3921 mem_cpy(dir + 13, buf + 2, 19);
3922 dir[DIR_Attr] = buf[0] | AM_ARC;
3923 djo.fs->wflag = 1;
3924 if ((dir[DIR_Attr] & AM_DIR) && djo.sclust != djn.sclust) { /* Update .. entry in the sub-directory if needed */
3925 dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
3926 if (!dw) {
3927 res = FR_INT_ERR;
3928 } else {
3929 res = move_window(djo.fs, dw);
3930 dir = djo.fs->win + SZ_DIRE * 1; /* Ptr to .. entry */
3931 if (res == FR_OK && dir[1] == '.') {
3932 st_clust(dir, djn.sclust);
3933 djo.fs->wflag = 1;
3934 }
3935 }
3936 }
3937 if (res == FR_OK) {
3938 res = dir_remove(&djo); /* Remove old entry */
3939 if (res == FR_OK)
3940 res = sync_fs(djo.fs);
3941 }
3942/* End of critical section */
3943 }
3944 }
3945 }
3946 }
3947 FREE_BUF();
3948 }
3949
3950 if (temp_new_path != 0) ff_memfree(temp_new_path);
3951
3952 LEAVE_FF(djo.fs, res);
3953}
3954
3955
3956
3957
3958/*-----------------------------------------------------------------------*/
3959/* Change Timestamp */
3960/*-----------------------------------------------------------------------*/
3961
3962FRESULT f_utime (
3963 const TCHAR* path, /* Pointer to the file/directory name */
3964 const FILINFO* fno /* Pointer to the time stamp to be set */
3965)
3966{
3967 FRESULT res;
3968 FATFS_DIR dj;
3969 BYTE *dir;
3970 DEFINE_NAMEBUF;
3971
3972
3973 /* Get logical drive number */
3974 res = find_volume(&dj.fs, &path, 1);
3975 if (res == FR_OK) {
3976 INIT_BUF(dj);
3977 res = follow_path(&dj, path); /* Follow the file path */
3978 FREE_BUF();
3979 if (FF_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
3980 res = FR_INVALID_NAME;
3981 if (res == FR_OK) {
3982 dir = dj.dir;
3983 if (!dir) { /* Root directory */
3984 res = FR_INVALID_NAME;
3985 } else { /* File or sub-directory */
3986 ST_WORD(dir + DIR_WrtTime, fno->ftime);
3987 ST_WORD(dir + DIR_WrtDate, fno->fdate);
3988 dj.fs->wflag = 1;
3989 res = sync_fs(dj.fs);
3990 }
3991 }
3992 }
3993
3994 LEAVE_FF(dj.fs, res);
3995}
3996
3997#endif /* !FF_FS_READONLY */
3998#endif /* FF_FS_MINIMIZE == 0 */
3999#endif /* FF_FS_MINIMIZE <= 1 */
4000#endif /* FF_FS_MINIMIZE <= 2 */
4001
4002
4003
4004
4005#if FF_USE_LABEL
4006/*-----------------------------------------------------------------------*/
4007/* Get volume label */
4008/*-----------------------------------------------------------------------*/
4009
4010FRESULT f_getlabel (
4011 const TCHAR* path, /* Path name of the logical drive number */
4012 TCHAR* label, /* Pointer to a buffer to return the volume label */
4013 DWORD* vsn /* Pointer to a variable to return the volume serial number */
4014)
4015{
4016 FRESULT res;
4017 FATFS_DIR dj;
4018 UINT i, j;
4019#if FF_USE_LFN && FF_LFN_UNICODE
4020 WCHAR w;
4021#endif
4022
4023
4024 /* Get logical drive number */
4025 res = find_volume(&dj.fs, &path, 0);
4026
4027 /* Get volume label */
4028 if (res == FR_OK && label) {
4029 dj.sclust = 0; /* Open root directory */
4030 res = dir_sdi(&dj, 0);
4031 if (res == FR_OK) {
4032 res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
4033 if (res == FR_OK) { /* A volume label is exist */
4034#if FF_USE_LFN && FF_LFN_UNICODE
4035 i = j = 0;
4036 do {
4037 w = (i < 11) ? dj.dir[i++] : ' ';
4038 if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i]))
4039 w = w << 8 | dj.dir[i++];
4040 label[j++] = ff_convert(w, 1); /* OEM -> Unicode */
4041 } while (j < 11);
4042#else
4043 mem_cpy(label, dj.dir, 11);
4044#endif
4045 j = 11;
4046 do {
4047 label[j] = 0;
4048 if (!j) break;
4049 } while (label[--j] == ' ');
4050 }
4051 if (res == FR_NO_FILE) { /* No label, return nul string */
4052 label[0] = 0;
4053 res = FR_OK;
4054 }
4055 }
4056 }
4057
4058 /* Get volume serial number */
4059 if (res == FR_OK && vsn) {
4060 res = move_window(dj.fs, dj.fs->volbase);
4061 if (res == FR_OK) {
4062 i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID;
4063 *vsn = LD_DWORD(&dj.fs->win[i]);
4064 }
4065 }
4066
4067 LEAVE_FF(dj.fs, res);
4068}
4069
4070
4071
4072#if !FF_FS_READONLY
4073/*-----------------------------------------------------------------------*/
4074/* Set volume label */
4075/*-----------------------------------------------------------------------*/
4076
4077FRESULT f_setlabel (
4078 const TCHAR* label /* Pointer to the volume label to set */
4079)
4080{
4081 FRESULT res;
4082 FATFS_DIR dj;
4083 BYTE vn[11];
4084 UINT i, j, sl;
4085 WCHAR w;
4086 DWORD tm;
4087#if FF_CODE_PAGE == 65001
4088 int code_size;
4089 unsigned char utf8_code[6];
4090#endif
4091
4092 /* Get logical drive number */
4093 res = find_volume(&dj.fs, &label, 1);
4094 if (res) LEAVE_FF(dj.fs, res);
4095
4096 /* Create a volume label in directory form */
4097 vn[0] = 0;
4098 for (sl = 0; label[sl]; sl++) ; /* Get name length */
4099 for ( ; sl && label[sl - 1] == ' '; sl--) ; /* Remove trailing spaces */
4100 if (sl) { /* Create volume label in directory form */
4101 i = j = 0;
4102 do {
4103#if FF_CODE_PAGE == 65001
4104 w = ff_wtoupper(Utf8_to_Utf16(&label[i], &code_size));
4105 i += code_size;
4106 Utf16_to_Utf8(utf8_code, &code_size, w);
4107 if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= sizeof(vn) - code_size) /* Reject invalid characters for volume label */
4108 LEAVE_FF(dj.fs, FR_INVALID_NAME);
4109 for (int k = 0; k < code_size; k++)
4110 vn[j++] = utf8_code[k];
4111#else
4112#if FF_USE_LFN && FF_LFN_UNICODE
4113 w = ff_convert(ff_wtoupper(label[i++]), 0);
4114#else
4115 w = (BYTE)label[i++];
4116 if (IsDBCS1(w))
4117 w = (j < 10 && i < sl && IsDBCS2(label[i])) ? w << 8 | (BYTE)label[i++] : 0;
4118#if FF_USE_LFN
4119 w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0);
4120#else
4121 if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */
4122#ifdef _EXCVT
4123 if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */
4124#else
4125 if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */
4126#endif
4127#endif
4128#endif
4129 if (!w || chk_chr("\"*+,.:;<=>\?[]|\x7F", w) || j >= (UINT)((w >= 0x100) ? 10 : 11)) /* Reject invalid characters for volume label */
4130 LEAVE_FF(dj.fs, FR_INVALID_NAME);
4131 if (w >= 0x100) vn[j++] = (BYTE)(w >> 8);
4132 vn[j++] = (BYTE)w;
4133#endif
4134 } while (i < sl);
4135 while (j < 11) vn[j++] = ' '; /* Fill remaining name field */
4136 if (vn[0] == DDEM) LEAVE_FF(dj.fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */
4137 }
4138
4139 /* Set volume label */
4140 dj.sclust = 0; /* Open root directory */
4141 res = dir_sdi(&dj, 0);
4142 if (res == FR_OK) {
4143 res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
4144 if (res == FR_OK) { /* A volume label is found */
4145 if (vn[0]) {
4146 mem_cpy(dj.dir, vn, 11); /* Change the volume label name */
4147 tm = GET_FATTIME();
4148 ST_DWORD(dj.dir + DIR_WrtTime, tm);
4149 } else {
4150 dj.dir[0] = DDEM; /* Remove the volume label */
4151 }
4152 dj.fs->wflag = 1;
4153 res = sync_fs(dj.fs);
4154 } else { /* No volume label is found or error */
4155 if (res == FR_NO_FILE) {
4156 res = FR_OK;
4157 if (vn[0]) { /* Create volume label as new */
4158 res = dir_alloc(&dj, 1); /* Allocate an entry for volume label */
4159 if (res == FR_OK) {
4160 mem_set(dj.dir, 0, SZ_DIRE); /* Set volume label */
4161 mem_cpy(dj.dir, vn, 11);
4162 dj.dir[DIR_Attr] = AM_VOL;
4163 tm = GET_FATTIME();
4164 ST_DWORD(dj.dir + DIR_WrtTime, tm);
4165 dj.fs->wflag = 1;
4166 res = sync_fs(dj.fs);
4167 }
4168 }
4169 }
4170 }
4171 }
4172
4173 LEAVE_FF(dj.fs, res);
4174}
4175
4176#endif /* !FF_FS_READONLY */
4177#endif /* FF_USE_LABEL */
4178
4179
4180
4181/*-----------------------------------------------------------------------*/
4182/* Forward data to the stream directly (available on only tiny cfg) */
4183/*-----------------------------------------------------------------------*/
4184#if FF_USE_FORWARD && FF_FS_TINY
4185
4186FRESULT f_forward (
4187 FIL* fp, /* Pointer to the file object */
4188 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
4189 UINT btf, /* Number of bytes to forward */
4190 UINT* bf /* Pointer to number of bytes forwarded */
4191)
4192{
4193 FRESULT res;
4194 DWORD remain, clst, sect;
4195 UINT rcnt;
4196 BYTE csect;
4197
4198
4199 *bf = 0; /* Clear transfer byte counter */
4200
4201 res = validate(fp); /* Check validity of the object */
4202 if (res != FR_OK) LEAVE_FF(fp->fs, res);
4203 if (fp->err) /* Check error */
4204 LEAVE_FF(fp->fs, (FRESULT)fp->err);
4205 if (!(fp->flag & FA_READ)) /* Check access mode */
4206 LEAVE_FF(fp->fs, FR_DENIED);
4207
4208 remain = fp->fsize - fp->fptr;
4209 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
4210
4211 for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream becomes busy */
4212 fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
4213 csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
4214 if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
4215 if (!csect) { /* On the cluster boundary? */
4216 clst = (fp->fptr == 0) ? /* On the top of the file? */
4217 fp->sclust : get_fat(fp->fs, fp->clust);
4218 if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
4219 if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
4220 fp->clust = clst; /* Update current cluster */
4221 }
4222 }
4223 sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */
4224 if (!sect) ABORT(fp->fs, FR_INT_ERR);
4225 sect += csect;
4226 if (move_window(fp->fs, sect) != FR_OK) /* Move sector window */
4227 ABORT(fp->fs, FR_DISK_ERR);
4228 fp->dsect = sect;
4229 rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
4230 if (rcnt > btf) rcnt = btf;
4231 rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
4232 if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
4233 }
4234
4235 LEAVE_FF(fp->fs, FR_OK);
4236}
4237#endif /* FF_USE_FORWARD */
4238
4239
4240
4241#if FF_USE_MKFS && !FF_FS_READONLY
4242/*-----------------------------------------------------------------------*/
4243/* Create file system on the logical drive */
4244/*-----------------------------------------------------------------------*/
4245#define N_ROOTDIR 512 /* Number of root directory entries for FAT12/16 */
4246#define N_FATS 1 /* Number of FATs (1 or 2) */
4247
4248
4249FRESULT f_mkfs (
4250 const TCHAR* path, /* Logical drive number */
4251 BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */
4252 UINT au /* Size of allocation unit in unit of byte or sector */
4253)
4254{
4255 static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0};
4256 static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
4257 int vol;
4258 BYTE fmt, md, sys, *tbl, pdrv, part;
4259 DWORD n_clst, vs, n, wsect;
4260 UINT i;
4261 DWORD b_vol, b_fat, b_dir, b_data; /* LBA */
4262 DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */
4263 FATFS *fs;
4264 DSTATUS stat;
4265#if FF_USE_TRIM
4266 DWORD eb[2];
4267#endif
4268
4269
4270 /* Check mounted drive and clear work area */
4271 if (sfd > 1) return FR_INVALID_PARAMETER;
4272 vol = get_ldnumber(&path);
4273 if (vol < 0) return FR_INVALID_DRIVE;
4274 fs = FatFs[vol];
4275 if (!fs) return FR_NOT_ENABLED;
4276 fs->fs_type = 0;
4277 pdrv = LD2PD(vol); /* Physical drive */
4278 part = LD2PT(vol); /* Partition (0:auto detect, 1-4:get from partition table)*/
4279
4280 /* Get disk statics */
4281 stat = disk_initialize(pdrv);
4282 if (stat & STA_NOINIT) return FR_NOT_READY;
4283 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
4284#if FF_MAX_SS != FF_MIN_SS /* Get disk sector size */
4285 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > FF_MAX_SS || SS(fs) < FF_MIN_SS)
4286 return FR_DISK_ERR;
4287#endif
4288 if (FF_MULTI_PARTITION && part) {
4289 /* Get partition information from partition table in the MBR */
4290 if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
4291 if (LD_WORD(fs->win + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
4292 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
4293 if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */
4294 b_vol = LD_DWORD(tbl + 8); /* Volume start sector */
4295 n_vol = LD_DWORD(tbl + 12); /* Volume size */
4296 } else {
4297 /* Create a partition in this function */
4298 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK || n_vol < 128)
4299 return FR_DISK_ERR;
4300 b_vol = (sfd) ? 0 : 63; /* Volume start sector */
4301 n_vol -= b_vol; /* Volume size */
4302 }
4303
4304 if (au & (au - 1)) au = 0;
4305 if (!au) { /* AU auto selection */
4306 vs = n_vol / (2000 / (SS(fs) / 512));
4307 for (i = 0; vs < vst[i]; i++) ;
4308 au = cst[i];
4309 }
4310 if (au >= FF_MIN_SS) au /= SS(fs); /* Number of sectors per cluster */
4311 if (!au) au = 1;
4312 if (au > 128) au = 128;
4313
4314 /* Pre-compute number of clusters and FAT sub-type */
4315 n_clst = n_vol / au;
4316 fmt = FS_FAT12;
4317 if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
4318 if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
4319
4320 /* Determine offset and size of FAT structure */
4321 if (fmt == FS_FAT32) {
4322 n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
4323 n_rsv = 32;
4324 n_dir = 0;
4325 } else {
4326 n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
4327 n_fat = (n_fat + SS(fs) - 1) / SS(fs);
4328 n_rsv = 1;
4329 n_dir = (DWORD)N_ROOTDIR * SZ_DIRE / SS(fs);
4330 }
4331 b_fat = b_vol + n_rsv; /* FAT area start sector */
4332 b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */
4333 b_data = b_dir + n_dir; /* Data area start sector */
4334 if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */
4335
4336 /* Align data start sector to erase block boundary (for flash memory media) */
4337 if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK || !n || n > 32768) n = 1;
4338 n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */
4339 n = (n - b_data) / N_FATS;
4340 if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */
4341 n_rsv += n;
4342 b_fat += n;
4343 } else { /* FAT12/16: Expand FAT size */
4344 n_fat += n;
4345 }
4346
4347 /* Determine number of clusters and final check of validity of the FAT sub-type */
4348 n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
4349 if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16)
4350 || (fmt == FS_FAT32 && n_clst < MIN_FAT32))
4351 return FR_MKFS_ABORTED;
4352
4353 /* Determine system ID in the partition table */
4354 if (fmt == FS_FAT32) {
4355 sys = 0x0C; /* FAT32X */
4356 } else {
4357 if (fmt == FS_FAT12 && n_vol < 0x10000) {
4358 sys = 0x01; /* FAT12(<65536) */
4359 } else {
4360 sys = (n_vol < 0x10000) ? 0x04 : 0x06; /* FAT16(<65536) : FAT12/16(>=65536) */
4361 }
4362 }
4363
4364 if (FF_MULTI_PARTITION && part) {
4365 /* Update system ID in the partition table */
4366 tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
4367 tbl[4] = sys;
4368 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to teh MBR */
4369 return FR_DISK_ERR;
4370 md = 0xF8;
4371 } else {
4372 if (sfd) { /* No partition table (SFD) */
4373 md = 0xF0;
4374 } else { /* Create partition table (FDISK) */
4375 mem_set(fs->win, 0, SS(fs));
4376 tbl = fs->win + MBR_Table; /* Create partition table for single partition in the drive */
4377 tbl[1] = 1; /* Partition start head */
4378 tbl[2] = 1; /* Partition start sector */
4379 tbl[3] = 0; /* Partition start cylinder */
4380 tbl[4] = sys; /* System type */
4381 tbl[5] = 254; /* Partition end head */
4382 n = (b_vol + n_vol) / 63 / 255;
4383 tbl[6] = (BYTE)(n >> 2 | 63); /* Partition end sector */
4384 tbl[7] = (BYTE)n; /* End cylinder */
4385 ST_DWORD(tbl + 8, 63); /* Partition start in LBA */
4386 ST_DWORD(tbl + 12, n_vol); /* Partition size in LBA */
4387 ST_WORD(fs->win + BS_55AA, 0xAA55); /* MBR signature */
4388 if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR */
4389 return FR_DISK_ERR;
4390 md = 0xF8;
4391 }
4392 }
4393
4394 /* Create BPB in the VBR */
4395 tbl = fs->win; /* Clear sector */
4396 mem_set(tbl, 0, SS(fs));
4397 mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
4398 i = SS(fs); /* Sector size */
4399 ST_WORD(tbl + BPB_BytsPerSec, i);
4400 tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */
4401 ST_WORD(tbl + BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
4402 tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
4403 i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of root directory entries */
4404 ST_WORD(tbl + BPB_RootEntCnt, i);
4405 if (n_vol < 0x10000) { /* Number of total sectors */
4406 ST_WORD(tbl + BPB_TotSec16, n_vol);
4407 } else {
4408 ST_DWORD(tbl + BPB_TotSec32, n_vol);
4409 }
4410 tbl[BPB_Media] = md; /* Media descriptor */
4411 ST_WORD(tbl + BPB_SecPerTrk, 63); /* Number of sectors per track */
4412 ST_WORD(tbl + BPB_NumHeads, 255); /* Number of heads */
4413 ST_DWORD(tbl + BPB_HiddSec, b_vol); /* Hidden sectors */
4414 n = GET_FATTIME(); /* Use current time as VSN */
4415 if (fmt == FS_FAT32) {
4416 ST_DWORD(tbl + BS_VolID32, n); /* VSN */
4417 ST_DWORD(tbl + BPB_FATSz32, n_fat); /* Number of sectors per FAT */
4418 ST_DWORD(tbl + BPB_RootClus, 2); /* Root directory start cluster (2) */
4419 ST_WORD(tbl + BPB_FSInfo, 1); /* FSINFO record offset (VBR + 1) */
4420 ST_WORD(tbl + BPB_BkBootSec, 6); /* Backup boot record offset (VBR + 6) */
4421 tbl[BS_DrvNum32] = 0x80; /* Drive number */
4422 tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
4423 mem_cpy(tbl + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
4424 } else {
4425 ST_DWORD(tbl + BS_VolID, n); /* VSN */
4426 ST_WORD(tbl + BPB_FATSz16, n_fat); /* Number of sectors per FAT */
4427 tbl[BS_DrvNum] = 0x80; /* Drive number */
4428 tbl[BS_BootSig] = 0x29; /* Extended boot signature */
4429 mem_cpy(tbl + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
4430 }
4431 ST_WORD(tbl + BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */
4432 if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */
4433 return FR_DISK_ERR;
4434 if (fmt == FS_FAT32) /* Write it to the backup VBR if needed (VBR + 6) */
4435 disk_write(pdrv, tbl, b_vol + 6, 1);
4436
4437 /* Initialize FAT area */
4438 wsect = b_fat;
4439 for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */
4440 mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
4441 n = md; /* Media descriptor byte */
4442 if (fmt != FS_FAT32) {
4443 n |= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
4444 ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT12/16) */
4445 } else {
4446 n |= 0xFFFFFF00;
4447 ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT32) */
4448 ST_DWORD(tbl + 4, 0xFFFFFFFF);
4449 ST_DWORD(tbl + 8, 0x0FFFFFFF); /* Reserve cluster #2 for root directory */
4450 }
4451 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
4452 return FR_DISK_ERR;
4453 mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */
4454 for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */
4455 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
4456 return FR_DISK_ERR;
4457 }
4458 }
4459
4460 /* Initialize root directory */
4461 i = (fmt == FS_FAT32) ? au : (UINT)n_dir;
4462 do {
4463 if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
4464 return FR_DISK_ERR;
4465 } while (--i);
4466
4467#if FF_USE_TRIM /* Erase data area if needed */
4468 {
4469 eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1;
4470 disk_ioctl(pdrv, CTRL_TRIM, eb);
4471 }
4472#endif
4473
4474 /* Create FSINFO if needed */
4475 if (fmt == FS_FAT32) {
4476 ST_DWORD(tbl + FSI_LeadSig, 0x41615252);
4477 ST_DWORD(tbl + FSI_StrucSig, 0x61417272);
4478 ST_DWORD(tbl + FSI_Free_Count, n_clst - 1); /* Number of free clusters */
4479 ST_DWORD(tbl + FSI_Nxt_Free, 2); /* Last allocated cluster# */
4480 ST_WORD(tbl + BS_55AA, 0xAA55);
4481 disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR + 1) */
4482 disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR + 7) */
4483 }
4484
4485 return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR;
4486}
4487
4488
4489
4490#if FF_MULTI_PARTITION
4491/*-----------------------------------------------------------------------*/
4492/* Create partition table on the physical drive */
4493/*-----------------------------------------------------------------------*/
4494
4495FRESULT f_fdisk (
4496 BYTE pdrv, /* Physical drive number */
4497 const DWORD szt[], /* Pointer to the size table for each partitions */
4498 void* work /* Pointer to the working buffer */
4499)
4500{
4501 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
4502 BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
4503 DSTATUS stat;
4504 DWORD sz_disk, sz_part, s_part;
4505
4506
4507 stat = disk_initialize(pdrv);
4508 if (stat & STA_NOINIT) return FR_NOT_READY;
4509 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
4510 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
4511
4512 /* Determine CHS in the table regardless of the drive geometry */
4513 for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
4514 if (n == 256) n--;
4515 e_hd = n - 1;
4516 sz_cyl = 63 * n;
4517 tot_cyl = sz_disk / sz_cyl;
4518
4519 /* Create partition table */
4520 mem_set(buf, 0, FF_MAX_SS);
4521 p = buf + MBR_Table; b_cyl = 0;
4522 for (i = 0; i < 4; i++, p += SZ_PTE) {
4523 p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;
4524 if (!p_cyl) continue;
4525 s_part = (DWORD)sz_cyl * b_cyl;
4526 sz_part = (DWORD)sz_cyl * p_cyl;
4527 if (i == 0) { /* Exclude first track of cylinder 0 */
4528 s_hd = 1;
4529 s_part += 63; sz_part -= 63;
4530 } else {
4531 s_hd = 0;
4532 }
4533 e_cyl = b_cyl + p_cyl - 1;
4534 if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
4535
4536 /* Set partition table */
4537 p[1] = s_hd; /* Start head */
4538 p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */
4539 p[3] = (BYTE)b_cyl; /* Start cylinder */
4540 p[4] = 0x06; /* System type (temporary setting) */
4541 p[5] = e_hd; /* End head */
4542 p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */
4543 p[7] = (BYTE)e_cyl; /* End cylinder */
4544 ST_DWORD(p + 8, s_part); /* Start sector in LBA */
4545 ST_DWORD(p + 12, sz_part); /* Partition size */
4546
4547 /* Next partition */
4548 b_cyl += p_cyl;
4549 }
4550 ST_WORD(p, 0xAA55);
4551
4552 /* Write it to the MBR */
4553 return (disk_write(pdrv, buf, 0, 1) != RES_OK || disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK;
4554}
4555
4556
4557#endif /* FF_MULTI_PARTITION */
4558#endif /* FF_USE_MKFS && !FF_FS_READONLY */
4559
4560
4561
4562
4563#if FF_USE_STRFUNC
4564/*-----------------------------------------------------------------------*/
4565/* Get a string from the file */
4566/*-----------------------------------------------------------------------*/
4567
4568TCHAR* f_gets (
4569 TCHAR* buff, /* Pointer to the string buffer to read */
4570 int len, /* Size of string buffer (characters) */
4571 FIL* fp /* Pointer to the file object */
4572)
4573{
4574 int n = 0;
4575 TCHAR c, *p = buff;
4576 BYTE s[2];
4577 UINT rc;
4578
4579
4580 while (n < len - 1) { /* Read characters until buffer gets filled */
4581#if FF_USE_LFN && FF_LFN_UNICODE
4582#if FF_STRF_ENCODE == 3 /* Read a character in UTF-8 */
4583 f_read(fp, s, 1, &rc);
4584 if (rc != 1) break;
4585 c = s[0];
4586 if (c >= 0x80) {
4587 if (c < 0xC0) continue; /* Skip stray trailer */
4588 if (c < 0xE0) { /* Two-byte sequence */
4589 f_read(fp, s, 1, &rc);
4590 if (rc != 1) break;
4591 c = (c & 0x1F) << 6 | (s[0] & 0x3F);
4592 if (c < 0x80) c = '?';
4593 } else {
4594 if (c < 0xF0) { /* Three-byte sequence */
4595 f_read(fp, s, 2, &rc);
4596 if (rc != 2) break;
4597 c = c << 12 | (s[0] & 0x3F) << 6 | (s[1] & 0x3F);
4598 if (c < 0x800) c = '?';
4599 } else { /* Reject four-byte sequence */
4600 c = '?';
4601 }
4602 }
4603 }
4604#elif FF_STRF_ENCODE == 2 /* Read a character in UTF-16BE */
4605 f_read(fp, s, 2, &rc);
4606 if (rc != 2) break;
4607 c = s[1] + (s[0] << 8);
4608#elif FF_STRF_ENCODE == 1 /* Read a character in UTF-16LE */
4609 f_read(fp, s, 2, &rc);
4610 if (rc != 2) break;
4611 c = s[0] + (s[1] << 8);
4612#else /* Read a character in ANSI/OEM */
4613 f_read(fp, s, 1, &rc);
4614 if (rc != 1) break;
4615 c = s[0];
4616 if (IsDBCS1(c)) {
4617 f_read(fp, s, 1, &rc);
4618 if (rc != 1) break;
4619 c = (c << 8) + s[0];
4620 }
4621 c = ff_convert(c, 1); /* OEM -> Unicode */
4622 if (!c) c = '?';
4623#endif
4624#else /* Read a character without conversion */
4625 f_read(fp, s, 1, &rc);
4626 if (rc != 1) break;
4627 c = s[0];
4628#endif
4629 if (FF_USE_STRFUNC == 2 && c == '\r') continue; /* Strip '\r' */
4630 *p++ = c;
4631 n++;
4632 if (c == '\n') break; /* Break on EOL */
4633 }
4634 *p = 0;
4635 return n ? buff : 0; /* When no data read (eof or error), return with error. */
4636}
4637
4638
4639
4640
4641#if !FF_FS_READONLY
4642/*-----------------------------------------------------------------------*/
4643/* Put a character to the file */
4644/*-----------------------------------------------------------------------*/
4645
4646typedef struct {
4647 FIL* fp;
4648 int idx, nchr;
4649 BYTE buf[64];
4650} putbuff;
4651
4652
4653static
4654void putc_bfd (
4655 putbuff* pb,
4656 TCHAR c
4657)
4658{
4659 UINT bw;
4660 int i;
4661
4662
4663 if (FF_USE_STRFUNC == 2 && c == '\n') /* LF -> CRLF conversion */
4664 putc_bfd(pb, '\r');
4665
4666 i = pb->idx; /* Buffer write index (-1:error) */
4667 if (i < 0) return;
4668
4669#if FF_USE_LFN && FF_LFN_UNICODE
4670#if FF_STRF_ENCODE == 3 /* Write a character in UTF-8 */
4671 if (c < 0x80) { /* 7-bit */
4672 pb->buf[i++] = (BYTE)c;
4673 } else {
4674 if (c < 0x800) { /* 11-bit */
4675 pb->buf[i++] = (BYTE)(0xC0 | c >> 6);
4676 } else { /* 16-bit */
4677 pb->buf[i++] = (BYTE)(0xE0 | c >> 12);
4678 pb->buf[i++] = (BYTE)(0x80 | (c >> 6 & 0x3F));
4679 }
4680 pb->buf[i++] = (BYTE)(0x80 | (c & 0x3F));
4681 }
4682#elif FF_STRF_ENCODE == 2 /* Write a character in UTF-16BE */
4683 pb->buf[i++] = (BYTE)(c >> 8);
4684 pb->buf[i++] = (BYTE)c;
4685#elif FF_STRF_ENCODE == 1 /* Write a character in UTF-16LE */
4686 pb->buf[i++] = (BYTE)c;
4687 pb->buf[i++] = (BYTE)(c >> 8);
4688#else /* Write a character in ANSI/OEM */
4689 c = ff_convert(c, 0); /* Unicode -> OEM */
4690 if (!c) c = '?';
4691 if (c >= 0x100)
4692 pb->buf[i++] = (BYTE)(c >> 8);
4693 pb->buf[i++] = (BYTE)c;
4694#endif
4695#else /* Write a character without conversion */
4696 pb->buf[i++] = (BYTE)c;
4697#endif
4698
4699 if (i >= (int)(sizeof pb->buf) - 3) { /* Write buffered characters to the file */
4700 f_write(pb->fp, pb->buf, (UINT)i, &bw);
4701 i = (bw == (UINT)i) ? 0 : -1;
4702 }
4703 pb->idx = i;
4704 pb->nchr++;
4705}
4706
4707
4708
4709int f_putc (
4710 TCHAR c, /* A character to be output */
4711 FIL* fp /* Pointer to the file object */
4712)
4713{
4714 putbuff pb;
4715 UINT nw;
4716
4717
4718 pb.fp = fp; /* Initialize output buffer */
4719 pb.nchr = pb.idx = 0;
4720
4721 putc_bfd(&pb, c); /* Put a character */
4722
4723 if ( pb.idx >= 0 /* Flush buffered characters to the file */
4724 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
4725 && (UINT)pb.idx == nw) return pb.nchr;
4726 return EOF;
4727}
4728
4729
4730
4731
4732/*-----------------------------------------------------------------------*/
4733/* Put a string to the file */
4734/*-----------------------------------------------------------------------*/
4735
4736int f_puts (
4737 const TCHAR* str, /* Pointer to the string to be output */
4738 FIL* fp /* Pointer to the file object */
4739)
4740{
4741 putbuff pb;
4742 UINT nw;
4743
4744
4745 pb.fp = fp; /* Initialize output buffer */
4746 pb.nchr = pb.idx = 0;
4747
4748 while (*str) /* Put the string */
4749 putc_bfd(&pb, *str++);
4750
4751 if ( pb.idx >= 0 /* Flush buffered characters to the file */
4752 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
4753 && (UINT)pb.idx == nw) return pb.nchr;
4754 return EOF;
4755}
4756
4757
4758
4759
4760/*-----------------------------------------------------------------------*/
4761/* Put a formatted string to the file */
4762/*-----------------------------------------------------------------------*/
4763
4764int f_vprintf (
4765 FIL* fp, /* Pointer to the file object */
4766 const TCHAR* fmt, /* Pointer to the format string */
4767 va_list arp /* Optional arguments... */
4768)
4769{
4770 BYTE f, r;
4771 UINT nw, i, j, w;
4772 DWORD v;
4773 TCHAR c, d, s[16], *p;
4774 putbuff pb;
4775
4776
4777 pb.fp = fp; /* Initialize output buffer */
4778 pb.nchr = pb.idx = 0;
4779
4780 for (;;) {
4781 c = *fmt++;
4782 if (c == 0) break; /* End of string */
4783 if (c != '%') { /* Non escape character */
4784 putc_bfd(&pb, c);
4785 continue;
4786 }
4787 w = f = 0;
4788 c = *fmt++;
4789 if (c == '0') { /* Flag: '0' padding */
4790 f = 1; c = *fmt++;
4791 } else {
4792 if (c == '-') { /* Flag: left justified */
4793 f = 2; c = *fmt++;
4794 }
4795 }
4796 while (IsDigit(c)) { /* Precision */
4797 w = w * 10 + c - '0';
4798 c = *fmt++;
4799 }
4800 if (c == 'l' || c == 'L') { /* Prefix: Size is long int */
4801 f |= 4; c = *fmt++;
4802 }
4803 if (!c) break;
4804 d = c;
4805 if (IsLower(d)) d -= 0x20;
4806 switch (d) { /* Type is... */
4807 case 'S' : /* String */
4808 p = va_arg(arp, TCHAR*);
4809 for (j = 0; p[j]; j++) ;
4810 if (!(f & 2)) {
4811 while (j++ < w) putc_bfd(&pb, ' ');
4812 }
4813 while (*p) putc_bfd(&pb, *p++);
4814 while (j++ < w) putc_bfd(&pb, ' ');
4815 continue;
4816 case 'C' : /* Character */
4817 putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue;
4818 case 'B' : /* Binary */
4819 r = 2; break;
4820 case 'O' : /* Octal */
4821 r = 8; break;
4822 case 'D' : /* Signed decimal */
4823 case 'U' : /* Unsigned decimal */
4824 r = 10; break;
4825 case 'X' : /* Hexdecimal */
4826 r = 16; break;
4827 default: /* Unknown type (pass-through) */
4828 putc_bfd(&pb, c); continue;
4829 }
4830
4831 /* Get an argument and put it in numeral */
4832 v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int));
4833 if (d == 'D' && (v & 0x80000000)) {
4834 v = 0 - v;
4835 f |= 8;
4836 }
4837 i = 0;
4838 do {
4839 d = (TCHAR)(v % r); v /= r;
4840 if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
4841 s[i++] = d + '0';
4842 } while (v && i < sizeof s / sizeof s[0]);
4843 if (f & 8) s[i++] = '-';
4844 j = i; d = (f & 1) ? '0' : ' ';
4845 while (!(f & 2) && j++ < w) putc_bfd(&pb, d);
4846 do putc_bfd(&pb, s[--i]); while (i);
4847 while (j++ < w) putc_bfd(&pb, d);
4848 }
4849
4850 if ( pb.idx >= 0 /* Flush buffered characters to the file */
4851 && f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
4852 && (UINT)pb.idx == nw) return pb.nchr;
4853 return EOF;
4854}
4855
4856int f_printf (
4857 FIL* fp, /* Pointer to the file object */
4858 const TCHAR* fmt, /* Pointer to the format string */
4859 ... /* Optional arguments... */
4860)
4861{
4862 int ret;
4863 va_list arp;
4864
4865 va_start(arp, fmt);
4866 ret = f_vprintf(fp, fmt, arp);
4867 va_end(arp);
4868
4869 return ret;
4870}
4871
4872#endif /* !FF_FS_READONLY */
4873#endif /* FF_USE_STRFUNC */
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