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More Doxygen updates for multiple architecture support.
[pub/USBasp.git] / Projects / Incomplete / StandaloneProgrammer / Lib / PetiteFATFs / pff.c
1 /*----------------------------------------------------------------------------/
2 / Petit FatFs - FAT file system module R0.02a (C)ChaN, 2010
3 /-----------------------------------------------------------------------------/
4 / Petit FatFs module is an open source software to implement FAT file system to
5 / small embedded systems. This is a free software and is opened for education,
6 / research and commercial developments under license policy of following trems.
7 /
8 / Copyright (C) 2010, ChaN, all right reserved.
9 /
10 / * The Petit FatFs module is a free software and there is NO WARRANTY.
11 / * No restriction on use. You can use, modify and redistribute it for
12 / personal, non-profit or commercial use UNDER YOUR RESPONSIBILITY.
13 / * Redistributions of source code must retain the above copyright notice.
14 /
15 /-----------------------------------------------------------------------------/
16 / Jun 15,'09 R0.01a First release. (Branched from FatFs R0.07b.)
17 /
18 / Dec 14,'09 R0.02 Added multiple code page support.
19 / Added write funciton.
20 / Changed stream read mode interface.
21 / Dec 07,'10 R0.02a Added some configuration options.
22 / Fixed fails to open objects with DBCS character.
23 /----------------------------------------------------------------------------*/
24
25 #include "pff.h" /* Petit FatFs configurations and declarations */
26 #include "diskio.h" /* Declarations of low level disk I/O functions */
27
28
29
30 /*--------------------------------------------------------------------------
31
32 Module Private Definitions
33
34 ---------------------------------------------------------------------------*/
35
36
37 #if _FS_FAT32
38 #define LD_CLUST(dir) (((DWORD)LD_WORD(dir+DIR_FstClusHI)<<16) | LD_WORD(dir+DIR_FstClusLO))
39 #else
40 #define LD_CLUST(dir) LD_WORD(dir+DIR_FstClusLO)
41 #endif
42
43
44 /*--------------------------------------------------------*/
45 /* DBCS code ranges and SBCS extend char conversion table */
46
47 #if _CODE_PAGE == 932 /* Japanese Shift-JIS */
48 #define _DF1S 0x81 /* DBC 1st byte range 1 start */
49 #define _DF1E 0x9F /* DBC 1st byte range 1 end */
50 #define _DF2S 0xE0 /* DBC 1st byte range 2 start */
51 #define _DF2E 0xFC /* DBC 1st byte range 2 end */
52 #define _DS1S 0x40 /* DBC 2nd byte range 1 start */
53 #define _DS1E 0x7E /* DBC 2nd byte range 1 end */
54 #define _DS2S 0x80 /* DBC 2nd byte range 2 start */
55 #define _DS2E 0xFC /* DBC 2nd byte range 2 end */
56
57 #elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
58 #define _DF1S 0x81
59 #define _DF1E 0xFE
60 #define _DS1S 0x40
61 #define _DS1E 0x7E
62 #define _DS2S 0x80
63 #define _DS2E 0xFE
64
65 #elif _CODE_PAGE == 949 /* Korean */
66 #define _DF1S 0x81
67 #define _DF1E 0xFE
68 #define _DS1S 0x41
69 #define _DS1E 0x5A
70 #define _DS2S 0x61
71 #define _DS2E 0x7A
72 #define _DS3S 0x81
73 #define _DS3E 0xFE
74
75 #elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
76 #define _DF1S 0x81
77 #define _DF1E 0xFE
78 #define _DS1S 0x40
79 #define _DS1E 0x7E
80 #define _DS2S 0xA1
81 #define _DS2E 0xFE
82
83 #elif _CODE_PAGE == 437 /* U.S. (OEM) */
84 #define _DF1S 0
85 #define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F,0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
86 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
87 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
88 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
89
90 #elif _CODE_PAGE == 720 /* Arabic (OEM) */
91 #define _DF1S 0
92 #define _EXCVT {0x80,0x81,0x45,0x41,0x84,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x49,0x49,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
93 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
94 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
95 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
96
97 #elif _CODE_PAGE == 737 /* Greek (OEM) */
98 #define _DF1S 0
99 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
100 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
101 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
102 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xE7,0xE8,0xF1,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
103
104 #elif _CODE_PAGE == 775 /* Baltic (OEM) */
105 #define _DF1S 0
106 #define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
107 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
108 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
109 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
110
111 #elif _CODE_PAGE == 850 /* Multilingual Latin 1 (OEM) */
112 #define _DF1S 0
113 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
114 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
115 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
116 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
117
118 #elif _CODE_PAGE == 852 /* Latin 2 (OEM) */
119 #define _DF1S 0
120 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F,0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0x9F, \
121 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
122 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
123 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
124
125 #elif _CODE_PAGE == 855 /* Cyrillic (OEM) */
126 #define _DF1S 0
127 #define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F,0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
128 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
129 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
130 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
131
132 #elif _CODE_PAGE == 857 /* Turkish (OEM) */
133 #define _DF1S 0
134 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x98,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
135 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
136 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
137 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0x59,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
138
139 #elif _CODE_PAGE == 858 /* Multilingual Latin 1 + Euro (OEM) */
140 #define _DF1S 0
141 #define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0xDE,0x8E,0x8F,0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x59,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
142 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
143 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD1,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
144 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE7,0xE9,0xEA,0xEB,0xED,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
145
146 #elif _CODE_PAGE == 862 /* Hebrew (OEM) */
147 #define _DF1S 0
148 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
149 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0x21,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
150 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
151 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
152
153 #elif _CODE_PAGE == 866 /* Russian (OEM) */
154 #define _DF1S 0
155 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
156 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
157 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
158 0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
159
160 #elif _CODE_PAGE == 874 /* Thai (OEM, Windows) */
161 #define _DF1S 0
162 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
163 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,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,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
165 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
166
167 #elif _CODE_PAGE == 1250 /* Central Europe (Windows) */
168 #define _DF1S 0
169 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
170 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xA3,0xB4,0xB5,0xB6,0xB7,0xB8,0xA5,0xAA,0xBB,0xBC,0xBD,0xBC,0xAF, \
171 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
172 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
173
174 #elif _CODE_PAGE == 1251 /* Cyrillic (Windows) */
175 #define _DF1S 0
176 #define _EXCVT {0x80,0x81,0x82,0x82,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x80,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x8D,0x8E,0x8F, \
177 0xA0,0xA2,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB2,0xA5,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xA3,0xBD,0xBD,0xAF, \
178 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
179 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF}
180
181 #elif _CODE_PAGE == 1252 /* Latin 1 (Windows) */
182 #define _DF1S 0
183 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0xAd,0x9B,0x8C,0x9D,0xAE,0x9F, \
184 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
185 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
186 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
187
188 #elif _CODE_PAGE == 1253 /* Greek (Windows) */
189 #define _DF1S 0
190 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
191 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
192 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xA2,0xB8,0xB9,0xBA, \
193 0xE0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xFB,0xBC,0xFD,0xBF,0xFF}
194
195 #elif _CODE_PAGE == 1254 /* Turkish (Windows) */
196 #define _DF1S 0
197 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x8A,0x9B,0x8C,0x9D,0x9E,0x9F, \
198 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
199 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
200 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0x9F}
201
202 #elif _CODE_PAGE == 1255 /* Hebrew (Windows) */
203 #define _DF1S 0
204 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
205 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
206 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
207 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
208
209 #elif _CODE_PAGE == 1256 /* Arabic (Windows) */
210 #define _DF1S 0
211 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x8C,0x9D,0x9E,0x9F, \
212 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
213 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
214 0x41,0xE1,0x41,0xE3,0xE4,0xE5,0xE6,0x43,0x45,0x45,0x45,0x45,0xEC,0xED,0x49,0x49,0xF0,0xF1,0xF2,0xF3,0x4F,0xF5,0xF6,0xF7,0xF8,0x55,0xFA,0x55,0x55,0xFD,0xFE,0xFF}
215
216 #elif _CODE_PAGE == 1257 /* Baltic (Windows) */
217 #define _DF1S 0
218 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
219 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xA8,0xB9,0xAA,0xBB,0xBC,0xBD,0xBE,0xAF, \
220 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
221 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xFF}
222
223 #elif _CODE_PAGE == 1258 /* Vietnam (OEM, Windows) */
224 #define _DF1S 0
225 #define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0xAC,0x9D,0x9E,0x9F, \
226 0xA0,0x21,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
227 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
228 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xEC,0xCD,0xCE,0xCF,0xD0,0xD1,0xF2,0xD3,0xD4,0xD5,0xD6,0xF7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xFE,0x9F}
229
230 #elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
231 #define _DF1S 0
232
233 #else
234 #error Unknown code page
235
236 #endif
237
238
239
240 /* Character code support macros */
241
242 #define IsUpper(c) (((c)>='A')&&((c)<='Z'))
243 #define IsLower(c) (((c)>='a')&&((c)<='z'))
244
245 #if _DF1S /* DBCS configuration */
246
247 #ifdef _DF2S /* Two 1st byte areas */
248 #define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) || ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
249 #else /* One 1st byte area */
250 #define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
251 #endif
252
253 #ifdef _DS3S /* Three 2nd byte areas */
254 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) || ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
255 #else /* Two 2nd byte areas */
256 #define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) || ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
257 #endif
258
259 #else /* SBCS configuration */
260
261 #define IsDBCS1(c) 0
262 #define IsDBCS2(c) 0
263
264 #endif /* _DF1S */
265
266
267 /* FatFs refers the members in the FAT structures with byte offset instead
268 / of structure member because there are incompatibility of the packing option
269 / between various compilers. */
270
271 #define BS_jmpBoot 0
272 #define BS_OEMName 3
273 #define BPB_BytsPerSec 11
274 #define BPB_SecPerClus 13
275 #define BPB_RsvdSecCnt 14
276 #define BPB_NumFATs 16
277 #define BPB_RootEntCnt 17
278 #define BPB_TotSec16 19
279 #define BPB_Media 21
280 #define BPB_FATSz16 22
281 #define BPB_SecPerTrk 24
282 #define BPB_NumHeads 26
283 #define BPB_HiddSec 28
284 #define BPB_TotSec32 32
285 #define BS_55AA 510
286
287 #define BS_DrvNum 36
288 #define BS_BootSig 38
289 #define BS_VolID 39
290 #define BS_VolLab 43
291 #define BS_FilSysType 54
292
293 #define BPB_FATSz32 36
294 #define BPB_ExtFlags 40
295 #define BPB_FSVer 42
296 #define BPB_RootClus 44
297 #define BPB_FSInfo 48
298 #define BPB_BkBootSec 50
299 #define BS_DrvNum32 64
300 #define BS_BootSig32 66
301 #define BS_VolID32 67
302 #define BS_VolLab32 71
303 #define BS_FilSysType32 82
304
305 #define MBR_Table 446
306
307 #define DIR_Name 0
308 #define DIR_Attr 11
309 #define DIR_NTres 12
310 #define DIR_CrtTime 14
311 #define DIR_CrtDate 16
312 #define DIR_FstClusHI 20
313 #define DIR_WrtTime 22
314 #define DIR_WrtDate 24
315 #define DIR_FstClusLO 26
316 #define DIR_FileSize 28
317
318
319
320 /*--------------------------------------------------------------------------
321
322 Private Functions
323
324 ---------------------------------------------------------------------------*/
325
326
327 static
328 FATFS *FatFs; /* Pointer to the file system object (logical drive) */
329
330
331 /* Fill memory */
332 static
333 void mem_set (void* dst, int val, int cnt) {
334 char *d = (char*)dst;
335 while (cnt--) *d++ = (char)val;
336 }
337
338 /* Compare memory to memory */
339 static
340 int mem_cmp (const void* dst, const void* src, int cnt) {
341 const char *d = (const char *)dst, *s = (const char *)src;
342 int r = 0;
343 while (cnt-- && (r = *d++ - *s++) == 0) ;
344 return r;
345 }
346
347
348
349 /*-----------------------------------------------------------------------*/
350 /* FAT access - Read value of a FAT entry */
351 /*-----------------------------------------------------------------------*/
352
353 static
354 CLUST get_fat ( /* 1:IO error, Else:Cluster status */
355 CLUST clst /* Cluster# to get the link information */
356 )
357 {
358 WORD wc, bc, ofs;
359 BYTE buf[4];
360 FATFS *fs = FatFs;
361
362
363 if (clst < 2 || clst >= fs->n_fatent) /* Range check */
364 return 1;
365
366 switch (fs->fs_type) {
367 #if _FS_FAT12
368 case FS_FAT12 :
369 bc = (WORD)clst; bc += bc / 2;
370 ofs = bc % 512; bc /= 512;
371 if (ofs != 511) {
372 if (disk_readp(buf, fs->fatbase + bc, ofs, 2)) break;
373 } else {
374 if (disk_readp(buf, fs->fatbase + bc, 511, 1)) break;
375 if (disk_readp(buf+1, fs->fatbase + bc + 1, 0, 1)) break;
376 }
377 wc = LD_WORD(buf);
378 return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
379 #endif
380 case FS_FAT16 :
381 if (disk_readp(buf, fs->fatbase + clst / 256, (WORD)(((WORD)clst % 256) * 2), 2)) break;
382 return LD_WORD(buf);
383 #if _FS_FAT32
384 case FS_FAT32 :
385 if (disk_readp(buf, fs->fatbase + clst / 128, (WORD)(((WORD)clst % 128) * 4), 4)) break;
386 return LD_DWORD(buf) & 0x0FFFFFFF;
387 #endif
388 }
389
390 return 1; /* An error occured at the disk I/O layer */
391 }
392
393
394
395
396 /*-----------------------------------------------------------------------*/
397 /* Get sector# from cluster# */
398 /*-----------------------------------------------------------------------*/
399
400 static
401 DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
402 CLUST clst /* Cluster# to be converted */
403 )
404 {
405 FATFS *fs = FatFs;
406
407
408 clst -= 2;
409 if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */
410 return (DWORD)clst * fs->csize + fs->database;
411 }
412
413
414
415
416 /*-----------------------------------------------------------------------*/
417 /* Directory handling - Rewind directory index */
418 /*-----------------------------------------------------------------------*/
419
420 static
421 FRESULT dir_rewind (
422 DIR *dj /* Pointer to directory object */
423 )
424 {
425 CLUST clst;
426 FATFS *fs = FatFs;
427
428
429 dj->index = 0;
430 clst = dj->sclust;
431 if (clst == 1 || clst >= fs->n_fatent) /* Check start cluster range */
432 return FR_DISK_ERR;
433 if (_FS_FAT32 && !clst && fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
434 clst = (CLUST)fs->dirbase;
435 dj->clust = clst; /* Current cluster */
436 dj->sect = clst ? clust2sect(clst) : fs->dirbase; /* Current sector */
437
438 return FR_OK; /* Seek succeeded */
439 }
440
441
442
443
444 /*-----------------------------------------------------------------------*/
445 /* Directory handling - Move directory index next */
446 /*-----------------------------------------------------------------------*/
447
448 static
449 FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table */
450 DIR *dj /* Pointer to directory object */
451 )
452 {
453 CLUST clst;
454 WORD i;
455 FATFS *fs = FatFs;
456
457
458 i = dj->index + 1;
459 if (!i || !dj->sect) /* Report EOT when index has reached 65535 */
460 return FR_NO_FILE;
461
462 if (!(i % 16)) { /* Sector changed? */
463 dj->sect++; /* Next sector */
464
465 if (dj->clust == 0) { /* Static table */
466 if (i >= fs->n_rootdir) /* Report EOT when end of table */
467 return FR_NO_FILE;
468 }
469 else { /* Dynamic table */
470 if (((i / 16) & (fs->csize-1)) == 0) { /* Cluster changed? */
471 clst = get_fat(dj->clust); /* Get next cluster */
472 if (clst <= 1) return FR_DISK_ERR;
473 if (clst >= fs->n_fatent) /* When it reached end of dynamic table */
474 return FR_NO_FILE; /* Report EOT */
475 dj->clust = clst; /* Initialize data for new cluster */
476 dj->sect = clust2sect(clst);
477 }
478 }
479 }
480
481 dj->index = i;
482
483 return FR_OK;
484 }
485
486
487
488
489 /*-----------------------------------------------------------------------*/
490 /* Directory handling - Find an object in the directory */
491 /*-----------------------------------------------------------------------*/
492
493 static
494 FRESULT dir_find (
495 DIR *dj, /* Pointer to the directory object linked to the file name */
496 BYTE *dir /* 32-byte working buffer */
497 )
498 {
499 FRESULT res;
500 BYTE c;
501
502
503 res = dir_rewind(dj); /* Rewind directory object */
504 if (res != FR_OK) return res;
505
506 do {
507 res = disk_readp(dir, dj->sect, (WORD)((dj->index % 16) * 32), 32) /* Read an entry */
508 ? FR_DISK_ERR : FR_OK;
509 if (res != FR_OK) break;
510 c = dir[DIR_Name]; /* First character */
511 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
512 if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
513 break;
514 res = dir_next(dj); /* Next entry */
515 } while (res == FR_OK);
516
517 return res;
518 }
519
520
521
522
523 /*-----------------------------------------------------------------------*/
524 /* Read an object from the directory */
525 /*-----------------------------------------------------------------------*/
526 #if _USE_DIR
527 static
528 FRESULT dir_read (
529 DIR *dj, /* Pointer to the directory object to store read object name */
530 BYTE *dir /* 32-byte working buffer */
531 )
532 {
533 FRESULT res;
534 BYTE a, c;
535
536
537 res = FR_NO_FILE;
538 while (dj->sect) {
539 res = disk_readp(dir, dj->sect, (WORD)((dj->index % 16) * 32), 32) /* Read an entry */
540 ? FR_DISK_ERR : FR_OK;
541 if (res != FR_OK) break;
542 c = dir[DIR_Name];
543 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
544 a = dir[DIR_Attr] & AM_MASK;
545 if (c != 0xE5 && c != '.' && !(a & AM_VOL)) /* Is it a valid entry? */
546 break;
547 res = dir_next(dj); /* Next entry */
548 if (res != FR_OK) break;
549 }
550
551 if (res != FR_OK) dj->sect = 0;
552
553 return res;
554 }
555 #endif
556
557
558
559 /*-----------------------------------------------------------------------*/
560 /* Pick a segment and create the object name in directory form */
561 /*-----------------------------------------------------------------------*/
562
563 #ifdef _EXCVT
564 static const BYTE cvt[] = _EXCVT;
565 #endif
566
567 static
568 FRESULT create_name (
569 DIR *dj, /* Pointer to the directory object */
570 const char **path /* Pointer to pointer to the segment in the path string */
571 )
572 {
573 BYTE c, d, ni, si, i, *sfn;
574 const char *p;
575
576 /* Create file name in directory form */
577 sfn = dj->fn;
578 mem_set(sfn, ' ', 11);
579 si = i = 0; ni = 8;
580 p = *path;
581 for (;;) {
582 c = p[si++];
583 if (c <= ' ' || c == '/') break; /* Break on end of segment */
584 if (c == '.' || i >= ni) {
585 if (ni != 8 || c != '.') break;
586 i = 8; ni = 11;
587 continue;
588 }
589 #ifdef _EXCVT
590 if (c >= 0x80) /* To upper extended char (SBCS) */
591 c = cvt[c - 0x80];
592 #endif
593 if (IsDBCS1(c) && i < ni - 1) { /* DBC 1st byte? */
594 d = p[si++]; /* Get 2nd byte */
595 sfn[i++] = c;
596 sfn[i++] = d;
597 } else { /* Single byte code */
598 if (IsLower(c)) c -= 0x20; /* toupper */
599 sfn[i++] = c;
600 }
601 }
602 *path = &p[si]; /* Rerurn pointer to the next segment */
603
604 sfn[11] = (c <= ' ') ? 1 : 0; /* Set last segment flag if end of path */
605
606 return FR_OK;
607 }
608
609
610
611
612 /*-----------------------------------------------------------------------*/
613 /* Get file information from directory entry */
614 /*-----------------------------------------------------------------------*/
615 #if _USE_DIR
616 static
617 void get_fileinfo ( /* No return code */
618 DIR *dj, /* Pointer to the directory object */
619 BYTE *dir, /* 32-byte working buffer */
620 FILINFO *fno /* Pointer to store the file information */
621 )
622 {
623 BYTE i, c;
624 char *p;
625
626
627 p = fno->fname;
628 if (dj->sect) {
629 for (i = 0; i < 8; i++) { /* Copy file name body */
630 c = dir[i];
631 if (c == ' ') break;
632 if (c == 0x05) c = 0xE5;
633 *p++ = c;
634 }
635 if (dir[8] != ' ') { /* Copy file name extension */
636 *p++ = '.';
637 for (i = 8; i < 11; i++) {
638 c = dir[i];
639 if (c == ' ') break;
640 *p++ = c;
641 }
642 }
643 fno->fattrib = dir[DIR_Attr]; /* Attribute */
644 fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */
645 fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */
646 fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */
647 }
648 *p = 0;
649 }
650 #endif /* _USE_DIR */
651
652
653
654 /*-----------------------------------------------------------------------*/
655 /* Follow a file path */
656 /*-----------------------------------------------------------------------*/
657
658 static
659 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
660 DIR *dj, /* Directory object to return last directory and found object */
661 BYTE *dir, /* 32-byte working buffer */
662 const char *path /* Full-path string to find a file or directory */
663 )
664 {
665 FRESULT res;
666
667
668 while (*path == ' ') path++; /* Skip leading spaces */
669 if (*path == '/') path++; /* Strip heading separator */
670 dj->sclust = 0; /* Set start directory (always root dir) */
671
672 if ((BYTE)*path <= ' ') { /* Null path means the root directory */
673 res = dir_rewind(dj);
674 dir[0] = 0;
675
676 } else { /* Follow path */
677 for (;;) {
678 res = create_name(dj, &path); /* Get a segment */
679 if (res != FR_OK) break;
680 res = dir_find(dj, dir); /* Find it */
681 if (res != FR_OK) { /* Could not find the object */
682 if (res == FR_NO_FILE && !*(dj->fn+11))
683 res = FR_NO_PATH;
684 break;
685 }
686 if (*(dj->fn+11)) break; /* Last segment match. Function completed. */
687 if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */
688 res = FR_NO_PATH; break;
689 }
690 dj->sclust = LD_CLUST(dir);
691 }
692 }
693
694 return res;
695 }
696
697
698
699
700 /*-----------------------------------------------------------------------*/
701 /* Check a sector if it is an FAT boot record */
702 /*-----------------------------------------------------------------------*/
703
704 static
705 BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */
706 BYTE *buf, /* Working buffer */
707 DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
708 )
709 {
710 if (disk_readp(buf, sect, 510, 2)) /* Read the boot sector */
711 return 3;
712 if (LD_WORD(buf) != 0xAA55) /* Check record signature */
713 return 2;
714
715 if (!disk_readp(buf, sect, BS_FilSysType, 2) && LD_WORD(buf) == 0x4146) /* Check FAT12/16 */
716 return 0;
717 if (_FS_FAT32 && !disk_readp(buf, sect, BS_FilSysType32, 2) && LD_WORD(buf) == 0x4146) /* Check FAT32 */
718 return 0;
719 return 1;
720 }
721
722
723
724
725 /*--------------------------------------------------------------------------
726
727 Public Functions
728
729 --------------------------------------------------------------------------*/
730
731
732
733 /*-----------------------------------------------------------------------*/
734 /* Mount/Unmount a Locical Drive */
735 /*-----------------------------------------------------------------------*/
736
737 FRESULT pf_mount (
738 FATFS *fs /* Pointer to new file system object (NULL: Unmount) */
739 )
740 {
741 BYTE fmt, buf[36];
742 DWORD bsect, fsize, tsect, mclst;
743
744
745 FatFs = 0;
746 if (!fs) return FR_OK; /* Unregister fs object */
747
748 if (disk_initialize() & STA_NOINIT) /* Check if the drive is ready or not */
749 return FR_NOT_READY;
750
751 /* Search FAT partition on the drive */
752 bsect = 0;
753 fmt = check_fs(buf, bsect); /* Check sector 0 as an SFD format */
754 if (fmt == 1) { /* Not an FAT boot record, it may be FDISK format */
755 /* Check a partition listed in top of the partition table */
756 if (disk_readp(buf, bsect, MBR_Table, 16)) { /* 1st partition entry */
757 fmt = 3;
758 } else {
759 if (buf[4]) { /* Is the partition existing? */
760 bsect = LD_DWORD(&buf[8]); /* Partition offset in LBA */
761 fmt = check_fs(buf, bsect); /* Check the partition */
762 }
763 }
764 }
765 if (fmt == 3) return FR_DISK_ERR;
766 if (fmt) return FR_NO_FILESYSTEM; /* No valid FAT patition is found */
767
768 /* Initialize the file system object */
769 if (disk_readp(buf, bsect, 13, sizeof(buf))) return FR_DISK_ERR;
770
771 fsize = LD_WORD(buf+BPB_FATSz16-13); /* Number of sectors per FAT */
772 if (!fsize) fsize = LD_DWORD(buf+BPB_FATSz32-13);
773
774 fsize *= buf[BPB_NumFATs-13]; /* Number of sectors in FAT area */
775 fs->fatbase = bsect + LD_WORD(buf+BPB_RsvdSecCnt-13); /* FAT start sector (lba) */
776 fs->csize = buf[BPB_SecPerClus-13]; /* Number of sectors per cluster */
777 fs->n_rootdir = LD_WORD(buf+BPB_RootEntCnt-13); /* Nmuber of root directory entries */
778 tsect = LD_WORD(buf+BPB_TotSec16-13); /* Number of sectors on the file system */
779 if (!tsect) tsect = LD_DWORD(buf+BPB_TotSec32-13);
780 mclst = (tsect /* Last cluster# + 1 */
781 - LD_WORD(buf+BPB_RsvdSecCnt-13) - fsize - fs->n_rootdir / 16
782 ) / fs->csize + 2;
783 fs->n_fatent = (CLUST)mclst;
784
785 fmt = FS_FAT16; /* Determine the FAT sub type */
786 if (mclst < 0xFF7) /* Number of clusters < 0xFF5 */
787 #if _FS_FAT12
788 fmt = FS_FAT12;
789 #else
790 return FR_NO_FILESYSTEM;
791 #endif
792 if (mclst >= 0xFFF7) /* Number of clusters >= 0xFFF5 */
793 #if _FS_FAT32
794 fmt = FS_FAT32;
795 #else
796 return FR_NO_FILESYSTEM;
797 #endif
798
799 fs->fs_type = fmt; /* FAT sub-type */
800 if (_FS_FAT32 && fmt == FS_FAT32)
801 fs->dirbase = LD_DWORD(buf+(BPB_RootClus-13)); /* Root directory start cluster */
802 else
803 fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */
804 fs->database = fs->fatbase + fsize + fs->n_rootdir / 16; /* Data start sector (lba) */
805
806 fs->flag = 0;
807 FatFs = fs;
808
809 return FR_OK;
810 }
811
812
813
814
815 /*-----------------------------------------------------------------------*/
816 /* Open or Create a File */
817 /*-----------------------------------------------------------------------*/
818
819 FRESULT pf_open (
820 const char *path /* Pointer to the file name */
821 )
822 {
823 FRESULT res;
824 DIR dj;
825 BYTE sp[12], dir[32];
826 FATFS *fs = FatFs;
827
828
829 if (!fs) /* Check file system */
830 return FR_NOT_ENABLED;
831
832 fs->flag = 0;
833 dj.fn = sp;
834 res = follow_path(&dj, dir, path); /* Follow the file path */
835 if (res != FR_OK) return res; /* Follow failed */
836 if (!dir[0] || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */
837 return FR_NO_FILE;
838
839 fs->org_clust = LD_CLUST(dir); /* File start cluster */
840 fs->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
841 fs->fptr = 0; /* File pointer */
842 fs->flag = FA_OPENED;
843
844 return FR_OK;
845 }
846
847
848
849
850 /*-----------------------------------------------------------------------*/
851 /* Read File */
852 /*-----------------------------------------------------------------------*/
853 #if _USE_READ
854
855 FRESULT pf_read (
856 void* buff, /* Pointer to the read buffer (NULL:Forward data to the stream)*/
857 WORD btr, /* Number of bytes to read */
858 WORD* br /* Pointer to number of bytes read */
859 )
860 {
861 DRESULT dr;
862 CLUST clst;
863 DWORD sect, remain;
864 WORD rcnt;
865 BYTE cs, *rbuff = buff;
866 FATFS *fs = FatFs;
867
868
869 *br = 0;
870 if (!fs) return FR_NOT_ENABLED; /* Check file system */
871 if (!(fs->flag & FA_OPENED)) /* Check if opened */
872 return FR_NOT_OPENED;
873
874 remain = fs->fsize - fs->fptr;
875 if (btr > remain) btr = (WORD)remain; /* Truncate btr by remaining bytes */
876
877 while (btr) { /* Repeat until all data transferred */
878 if ((fs->fptr % 512) == 0) { /* On the sector boundary? */
879 cs = (BYTE)(fs->fptr / 512 & (fs->csize - 1)); /* Sector offset in the cluster */
880 if (!cs) { /* On the cluster boundary? */
881 clst = (fs->fptr == 0) ? /* On the top of the file? */
882 fs->org_clust : get_fat(fs->curr_clust);
883 if (clst <= 1) goto fr_abort;
884 fs->curr_clust = clst; /* Update current cluster */
885 }
886 sect = clust2sect(fs->curr_clust); /* Get current sector */
887 if (!sect) goto fr_abort;
888 fs->dsect = sect + cs;
889 }
890 rcnt = (WORD)(512 - (fs->fptr % 512)); /* Get partial sector data from sector buffer */
891 if (rcnt > btr) rcnt = btr;
892 dr = disk_readp(!buff ? 0 : rbuff, fs->dsect, (WORD)(fs->fptr % 512), rcnt);
893 if (dr) goto fr_abort;
894 fs->fptr += rcnt; rbuff += rcnt; /* Update pointers and counters */
895 btr -= rcnt; *br += rcnt;
896 }
897
898 return FR_OK;
899
900 fr_abort:
901 fs->flag = 0;
902 return FR_DISK_ERR;
903 }
904 #endif
905
906
907
908 /*-----------------------------------------------------------------------*/
909 /* Write File */
910 /*-----------------------------------------------------------------------*/
911 #if _USE_WRITE
912
913 FRESULT pf_write (
914 const void* buff, /* Pointer to the data to be written */
915 WORD btw, /* Number of bytes to write (0:Finalize the current write operation) */
916 WORD* bw /* Pointer to number of bytes written */
917 )
918 {
919 CLUST clst;
920 DWORD sect, remain;
921 const BYTE *p = buff;
922 BYTE cs;
923 WORD wcnt;
924 FATFS *fs = FatFs;
925
926
927 *bw = 0;
928 if (!fs) return FR_NOT_ENABLED; /* Check file system */
929 if (!(fs->flag & FA_OPENED)) /* Check if opened */
930 return FR_NOT_OPENED;
931
932 if (!btw) { /* Finalize request */
933 if ((fs->flag & FA__WIP) && disk_writep(0, 0)) goto fw_abort;
934 fs->flag &= ~FA__WIP;
935 return FR_OK;
936 } else { /* Write data request */
937 if (!(fs->flag & FA__WIP)) /* Round-down fptr to the sector boundary */
938 fs->fptr &= 0xFFFFFE00;
939 }
940 remain = fs->fsize - fs->fptr;
941 if (btw > remain) btw = (WORD)remain; /* Truncate btw by remaining bytes */
942
943 while (btw) { /* Repeat until all data transferred */
944 if (((WORD)fs->fptr % 512) == 0) { /* On the sector boundary? */
945 cs = (BYTE)(fs->fptr / 512 & (fs->csize - 1)); /* Sector offset in the cluster */
946 if (!cs) { /* On the cluster boundary? */
947 clst = (fs->fptr == 0) ? /* On the top of the file? */
948 fs->org_clust : get_fat(fs->curr_clust);
949 if (clst <= 1) goto fw_abort;
950 fs->curr_clust = clst; /* Update current cluster */
951 }
952 sect = clust2sect(fs->curr_clust); /* Get current sector */
953 if (!sect) goto fw_abort;
954 fs->dsect = sect + cs;
955 if (disk_writep(0, fs->dsect)) goto fw_abort; /* Initiate a sector write operation */
956 fs->flag |= FA__WIP;
957 }
958 wcnt = 512 - ((WORD)fs->fptr % 512); /* Number of bytes to write to the sector */
959 if (wcnt > btw) wcnt = btw;
960 if (disk_writep(p, wcnt)) goto fw_abort; /* Send data to the sector */
961 fs->fptr += wcnt; p += wcnt; /* Update pointers and counters */
962 btw -= wcnt; *bw += wcnt;
963 if (((WORD)fs->fptr % 512) == 0) {
964 if (disk_writep(0, 0)) goto fw_abort; /* Finalize the currtent secter write operation */
965 fs->flag &= ~FA__WIP;
966 }
967 }
968
969 return FR_OK;
970
971 fw_abort:
972 fs->flag = 0;
973 return FR_DISK_ERR;
974 }
975 #endif
976
977
978
979 /*-----------------------------------------------------------------------*/
980 /* Seek File R/W Pointer */
981 /*-----------------------------------------------------------------------*/
982 #if _USE_LSEEK
983
984 FRESULT pf_lseek (
985 DWORD ofs /* File pointer from top of file */
986 )
987 {
988 CLUST clst;
989 DWORD bcs, sect, ifptr;
990 FATFS *fs = FatFs;
991
992
993 if (!fs) return FR_NOT_ENABLED; /* Check file system */
994 if (!(fs->flag & FA_OPENED)) /* Check if opened */
995 return FR_NOT_OPENED;
996
997 if (ofs > fs->fsize) ofs = fs->fsize; /* Clip offset with the file size */
998 ifptr = fs->fptr;
999 fs->fptr = 0;
1000 if (ofs > 0) {
1001 bcs = (DWORD)fs->csize * 512; /* Cluster size (byte) */
1002 if (ifptr > 0 &&
1003 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
1004 fs->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
1005 ofs -= fs->fptr;
1006 clst = fs->curr_clust;
1007 } else { /* When seek to back cluster, */
1008 clst = fs->org_clust; /* start from the first cluster */
1009 fs->curr_clust = clst;
1010 }
1011 while (ofs > bcs) { /* Cluster following loop */
1012 clst = get_fat(clst); /* Follow cluster chain */
1013 if (clst <= 1 || clst >= fs->n_fatent) goto fe_abort;
1014 fs->curr_clust = clst;
1015 fs->fptr += bcs;
1016 ofs -= bcs;
1017 }
1018 fs->fptr += ofs;
1019 sect = clust2sect(clst); /* Current sector */
1020 if (!sect) goto fe_abort;
1021 fs->dsect = sect + (fs->fptr / 512 & (fs->csize - 1));
1022 }
1023
1024 return FR_OK;
1025
1026 fe_abort:
1027 fs->flag = 0;
1028 return FR_DISK_ERR;
1029 }
1030 #endif
1031
1032
1033
1034 /*-----------------------------------------------------------------------*/
1035 /* Create a Directroy Object */
1036 /*-----------------------------------------------------------------------*/
1037 #if _USE_DIR
1038
1039 FRESULT pf_opendir (
1040 DIR *dj, /* Pointer to directory object to create */
1041 const char *path /* Pointer to the directory path */
1042 )
1043 {
1044 FRESULT res;
1045 BYTE sp[12], dir[32];
1046 FATFS *fs = FatFs;
1047
1048
1049 if (!fs) { /* Check file system */
1050 res = FR_NOT_ENABLED;
1051 } else {
1052 dj->fn = sp;
1053 res = follow_path(dj, dir, path); /* Follow the path to the directory */
1054 if (res == FR_OK) { /* Follow completed */
1055 if (dir[0]) { /* It is not the root dir */
1056 if (dir[DIR_Attr] & AM_DIR) /* The object is a directory */
1057 dj->sclust = LD_CLUST(dir);
1058 else /* The object is not a directory */
1059 res = FR_NO_PATH;
1060 }
1061 if (res == FR_OK)
1062 res = dir_rewind(dj); /* Rewind dir */
1063 }
1064 if (res == FR_NO_FILE) res = FR_NO_PATH;
1065 }
1066
1067 return res;
1068 }
1069
1070
1071
1072
1073 /*-----------------------------------------------------------------------*/
1074 /* Read Directory Entry in Sequense */
1075 /*-----------------------------------------------------------------------*/
1076
1077 FRESULT pf_readdir (
1078 DIR *dj, /* Pointer to the open directory object */
1079 FILINFO *fno /* Pointer to file information to return */
1080 )
1081 {
1082 FRESULT res;
1083 BYTE sp[12], dir[32];
1084 FATFS *fs = FatFs;
1085
1086
1087 if (!fs) { /* Check file system */
1088 res = FR_NOT_ENABLED;
1089 } else {
1090 dj->fn = sp;
1091 if (!fno) {
1092 res = dir_rewind(dj);
1093 } else {
1094 res = dir_read(dj, dir);
1095 if (res == FR_NO_FILE) {
1096 dj->sect = 0;
1097 res = FR_OK;
1098 }
1099 if (res == FR_OK) { /* A valid entry is found */
1100 get_fileinfo(dj, dir, fno); /* Get the object information */
1101 res = dir_next(dj); /* Increment index for next */
1102 if (res == FR_NO_FILE) {
1103 dj->sect = 0;
1104 res = FR_OK;
1105 }
1106 }
1107 }
1108 }
1109
1110 return res;
1111 }
1112
1113 #endif /* _USE_DIR */
1114
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