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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/* Access functions for GB2312 conversion.
Copyright (C) 1998, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _GB2312_H
#define _GB2312_H 1
#include <gconv.h>
#include <stdint.h>
#include <assert.h>
/* Conversion table. */
extern const uint16_t __gb2312_to_ucs[];
static inline uint32_t
gb2312_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset)
{
unsigned char ch = *(*s);
unsigned char ch2;
int idx;
if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x77)
return __UNKNOWN_10646_CHAR;
if (avail < 2)
return 0;
ch2 = (*s)[1];
if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
return __UNKNOWN_10646_CHAR;
idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);
if (idx > 0x1ff1)
return __UNKNOWN_10646_CHAR;
(*s) += 2;
return __gb2312_to_ucs[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR);
}
extern const char __gb2312_from_ucs4_tab1[][2];
extern const char __gb2312_from_ucs4_tab2[][2];
extern const char __gb2312_from_ucs4_tab3[][2];
extern const char __gb2312_from_ucs4_tab4[][2];
extern const char __gb2312_from_ucs4_tab5[][2];
extern const char __gb2312_from_ucs4_tab6[][2];
extern const char __gb2312_from_ucs4_tab7[][2];
extern const char __gb2312_from_ucs4_tab8[][2];
extern const char __gb2312_from_ucs4_tab9[][2];
static inline size_t
ucs4_to_gb2312 (uint32_t wch, unsigned char *s, size_t avail)
{
unsigned int ch = (unsigned int) wch;
char buf[2];
const char *cp = buf;
switch (ch)
{
case 0xa4 ... 0x100:
cp = __gb2312_from_ucs4_tab1[ch - 0xa4];
break;
case 0x113:
cp = "\x28\x25";
break;
case 0x11b:
cp = "\x28\x27";
break;
case 0x12b:
cp = "\x28\x29";
break;
case 0x14d:
cp = "\x28\x2d";
break;
case 0x16b:
cp = "\x28\x31";
break;
case 0x1ce:
cp = "\x28\x23";
break;
case 0x1d0:
cp = "\x28\x2b";
break;
case 0x1d2:
cp = "\x28\x2f";
break;
case 0x1d4:
cp = "\x28\x33";
break;
case 0x1d6:
cp = "\x28\x35";
break;
case 0x1d8:
cp = "\x28\x36";
break;
case 0x1da:
cp = "\x28\x37";
break;
case 0x1dc:
cp = "\x28\x38";
break;
case 0x2c7:
cp = "\x21\x26";
break;
case 0x2c9:
cp = "\x21\x25";
break;
case 0x391 ... 0x3c9:
cp = __gb2312_from_ucs4_tab2[ch - 0x391];
break;
case 0x401 ... 0x451:
cp = __gb2312_from_ucs4_tab3[ch - 0x401];
break;
case 0x2015 ... 0x203b:
cp = __gb2312_from_ucs4_tab4[ch - 0x2015];
break;
case 0x2103 ... 0x22a5:
cp = __gb2312_from_ucs4_tab5[ch - 0x2103];
break;
case 0x2313:
cp = "\x21\x50";
break;
case 0x2460 ... 0x249b:
cp = __gb2312_from_ucs4_tab6[ch - 0x2460];
break;
case 0x2500 ... 0x254b:
buf[0] = '\x29';
buf[1] = '\x24' + (ch & 256);
break;
case 0x25a0:
cp = "\x21\x76";
break;
case 0x25a1:
cp = "\x21\x75";
break;
case 0x25b2:
cp = "\x21\x78";
break;
case 0x25b3:
cp = "\x21\x77";
break;
case 0x25c6:
cp = "\x21\x74";
break;
case 0x25c7:
cp = "\x21\x73";
break;
case 0x25cb:
cp = "\x21\x70";
break;
case 0x25ce:
cp = "\x21\x72";
break;
case 0x25cf:
cp = "\x21\x71";
break;
case 0x2605:
cp = "\x21\x6f";
break;
case 0x2606:
cp = "\x21\x6e";
break;
case 0x2640:
cp = "\x21\x62";
break;
case 0x2642:
cp = "\x21\x61";
break;
case 0x3000 ... 0x3129:
cp = __gb2312_from_ucs4_tab7[ch - 0x3000];
break;
case 0x3220 ... 0x3229:
buf[0] = '\x22';
buf[1] = '\x65' + (ch - 0x3220);
break;
case 0x4e00 ... 0x9fa0:
cp = __gb2312_from_ucs4_tab8[ch - 0x4e00];
break;
case 0xff01 ... 0xff5e:
cp = __gb2312_from_ucs4_tab9[ch - 0xff01];
break;
case 0xffe0:
cp = "\x21\x69";
break;
case 0xffe1:
cp = "\x21\x6a";
break;
case 0xffe3:
cp = "\x23\x7e";
break;
case 0xffe5:
cp = "\x23\x24";
break;
default:
return __UNKNOWN_10646_CHAR;
}
if (cp[0] == '\0')
return __UNKNOWN_10646_CHAR;
assert (cp[1] != '\0');
if (avail < 2)
return 0;
s[0] = cp[0];
s[1] = cp[1];
return 2;
}
#endif /* gb2312.h */
|
GitWeb