-
Notifications
You must be signed in to change notification settings - Fork 2
/
lmbcs.c
170 lines (148 loc) · 4.88 KB
/
lmbcs.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
#include <stddef.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <conio.h>
#include <dos.h>
#include "config.h"
#include "debug.h"
static const unsigned char lmbcs_group1_table[256] = {
0xB1, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
0xB1, 0x7E, 0xF8, 0x5E, 0x60, 0x27, 0x22, 0x27,
0xB1, 0x2D, 0xC4, 0xB1, 0xB1, 0xB1, 0x3C, 0x3E,
0xB1, 0x7E, 0xF8, 0x5E, 0x60, 0x27, 0xB1, 0x2C,
0x22, 0xB1, 0xB1, 0xB1, 0xB1, 0xB1, 0xB1, 0xB1,
0xB1, 0xB1, 0x98, 0xB1, 0xB1, 0xB1, 0xC6, 0xC7,
0xDD, 0xDE, 0xB1, 0xB1, 0xB1, 0xB1, 0xB1, 0xB1,
0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
0xD8, 0xB5, 0xB6, 0xB7, 0xB8, 0xBD, 0xBE, 0xCF,
0xB1, 0xB1, 0xB1, 0xB1, 0xFC, 0x6C, 0x4C, 0xB1,
0xB1, 0xB1, 0xB1, 0xB1, 0xB1, 0xB1, 0xB1, 0xB1,
0xB1, 0xB1, 0xB1, 0xB1, 0xB1, 0xB1, 0xB1, 0xB1,
0xB1, 0xB1, 0xB1, 0xB1, 0x4B, 0xA9, 0x9C, 0x9E,
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, 0x6F, 0x9C, 0x4F, 0x78, 0x9F,
0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
0xA8, 0x54, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0x41, 0x41, 0x41,
0x63, 0xB9, 0xBA, 0xBB, 0xBC, 0x9B, 0x9D, 0xBF,
0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0x61, 0x41,
0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xB1,
0x64, 0x44, 0x45, 0x45, 0x45, 0x69, 0x49, 0x49,
0x49, 0xD9, 0xDA, 0xDB, 0xDC, 0x7C, 0x49, 0xDF,
0x4F, 0xE1, 0x4F, 0x4F, 0x6F, 0x4F, 0xE6, 0x70,
0x50, 0x55, 0x55, 0x55, 0x79, 0x59, 0x5F, 0x27,
0x2D, 0xF1, 0x3D, 0xB1, 0x14, 0x15, 0xF6, 0x2C,
0xF8, 0x22, 0xF9, 0x31, 0x33, 0xFD, 0xFE, 0xFF
};
// Add more code pages here, as needed, these are these tables:
// https://en.wikipedia.org/wiki/Lmbcs#Group_1
static const unsigned char * lmbcs_tables[31] = {
NULL, // 0
lmbcs_group1_table, // 1
};
// This is the table from https://en.wikipedia.org/wiki/Lmbcs#Encodings
static const int lmbcs_group_length[] = {
1, // NUL
2, // Code page 850 (DOS Latin-1)
2, // Code page 851 (DOS Greek)
2, // Code page 1255 (Windows Hebrew)
2, // Code page 1256 (Windows Arabic)
2, // Code page 1251 (Windows Cyrillic)
2, // Code page 852 (DOS Latin-2)
1, // BEL
2, // Code page 1254 (Windows Turkish)
1, // TAB
1, // LF
2, // Code page 874 (Thai)
2, // Reserved
1, // CR
2, // Reserved
2, // Remapped C0/C1 control codes
3, // Code page 932/
3, // Code page 949/
3, // Code page 950
3, // Code page 936/
3, // UTF-16 (Unicode)
3, // Reserved
3, // Reserved
3, // Reserved
3, // Reserved
1, // Lotus 1-2-3 system range
3, // Reserved
3, // Reserved
3, // Reserved
3, // Reserved
3, // Reserved
3, // Reserved
};
// maxlen == 0 means count chars, but dont write.
int translate_lmbcs(const void *src,
unsigned char *dst,
int maxdst,
int maxsrc,
int defgroup)
{
const unsigned char *p; // current lmbcs byte position
int count; // how many characters weve translated
p = src;
trace("translate_lmbcs");
traceint(maxdst);
traceint(maxsrc);
if (lmbcs_tables[defgroup] == NULL) {
trace("no translation table for default group");
__debugbreak();
}
if (maxsrc == -1) {
maxsrc = strlen(src);
traceint(maxsrc);
}
loghex(src, maxsrc);
for (count = 0; p < (unsigned char *) src + maxsrc; count++) {
// Literal character
if (*p >= 0x20 && *p <= 0x7f) {
if (count < maxdst) {
*dst++ = *p;
}
p++; // 1byte
continue;
}
// Nul terminator
if (*p == 0x00) {
if (count < maxdst) {
*dst++ = *p;
}
break;
}
if (*p < 0x20 && *p != 0x00) {
if (lmbcs_tables[*p] == NULL) {
logmsg("lmbcs string uses group %hd, no table available", *p);
if (count < maxdst) {
*dst++ = '?';
}
} else {
// Lookup in specified table.
if (count < maxdst) {
*dst++ = lmbcs_tables[p[0]][p[1]];
}
}
// Lookup how long this groups characters are.
p += lmbcs_group_length[*p];
continue;
}
// Lookup in default table.
if (count < maxdst) {
*dst++ = lmbcs_tables[defgroup][*p];
}
p++; // code
}
logmsg("translated characters is %d", count);
return count;
}