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40b4c81d | 1 | /* Access functions for GB2312 conversion. |
dd9423a6 | 2 | Copyright (C) 1998, 1999, 2003 Free Software Foundation, Inc. |
40b4c81d UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
40b4c81d UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
40b4c81d | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
40b4c81d UD |
19 | |
20 | #ifndef _GB2312_H | |
21 | #define _GB2312_H 1 | |
22 | ||
23 | #include <gconv.h> | |
24 | #include <stdint.h> | |
bc900b11 | 25 | #include <assert.h> |
40b4c81d UD |
26 | |
27 | /* Conversion table. */ | |
8619129f | 28 | extern const uint16_t __gb2312_to_ucs[]; |
40b4c81d UD |
29 | |
30 | ||
9b26f5c4 | 31 | static inline uint32_t |
dd9423a6 | 32 | __attribute ((always_inline)) |
918b9d72 | 33 | gb2312_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset) |
40b4c81d UD |
34 | { |
35 | unsigned char ch = *(*s); | |
36 | unsigned char ch2; | |
37 | int idx; | |
38 | ||
39 | if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x77) | |
d64b6ad0 | 40 | return __UNKNOWN_10646_CHAR; |
40b4c81d UD |
41 | |
42 | if (avail < 2) | |
43 | return 0; | |
44 | ||
45 | ch2 = (*s)[1]; | |
46 | if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f) | |
d64b6ad0 | 47 | return __UNKNOWN_10646_CHAR; |
40b4c81d UD |
48 | |
49 | idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset); | |
2b474353 | 50 | if (idx > 0x1ff1) |
d64b6ad0 | 51 | return __UNKNOWN_10646_CHAR; |
40b4c81d UD |
52 | |
53 | (*s) += 2; | |
54 | ||
d64b6ad0 | 55 | return __gb2312_to_ucs[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR); |
40b4c81d UD |
56 | } |
57 | ||
58 | ||
8619129f UD |
59 | extern const char __gb2312_from_ucs4_tab1[][2]; |
60 | extern const char __gb2312_from_ucs4_tab2[][2]; | |
61 | extern const char __gb2312_from_ucs4_tab3[][2]; | |
62 | extern const char __gb2312_from_ucs4_tab4[][2]; | |
63 | extern const char __gb2312_from_ucs4_tab5[][2]; | |
64 | extern const char __gb2312_from_ucs4_tab6[][2]; | |
65 | extern const char __gb2312_from_ucs4_tab7[][2]; | |
66 | extern const char __gb2312_from_ucs4_tab8[][2]; | |
67 | extern const char __gb2312_from_ucs4_tab9[][2]; | |
40b4c81d UD |
68 | |
69 | static inline size_t | |
dd9423a6 | 70 | __attribute ((always_inline)) |
bc900b11 | 71 | ucs4_to_gb2312 (uint32_t wch, unsigned char *s, size_t avail) |
40b4c81d UD |
72 | { |
73 | unsigned int ch = (unsigned int) wch; | |
74 | char buf[2]; | |
8619129f | 75 | const char *cp = buf; |
40b4c81d | 76 | |
8619129f | 77 | switch (ch) |
40b4c81d | 78 | { |
ffa156af | 79 | case 0xa4 ... 0x101: |
8619129f UD |
80 | cp = __gb2312_from_ucs4_tab1[ch - 0xa4]; |
81 | break; | |
82 | case 0x113: | |
83 | cp = "\x28\x25"; | |
84 | break; | |
85 | case 0x11b: | |
86 | cp = "\x28\x27"; | |
87 | break; | |
88 | case 0x12b: | |
89 | cp = "\x28\x29"; | |
90 | break; | |
91 | case 0x14d: | |
92 | cp = "\x28\x2d"; | |
93 | break; | |
94 | case 0x16b: | |
95 | cp = "\x28\x31"; | |
96 | break; | |
97 | case 0x1ce: | |
98 | cp = "\x28\x23"; | |
99 | break; | |
100 | case 0x1d0: | |
101 | cp = "\x28\x2b"; | |
102 | break; | |
103 | case 0x1d2: | |
104 | cp = "\x28\x2f"; | |
105 | break; | |
106 | case 0x1d4: | |
107 | cp = "\x28\x33"; | |
108 | break; | |
109 | case 0x1d6: | |
110 | cp = "\x28\x35"; | |
111 | break; | |
112 | case 0x1d8: | |
113 | cp = "\x28\x36"; | |
114 | break; | |
115 | case 0x1da: | |
116 | cp = "\x28\x37"; | |
117 | break; | |
118 | case 0x1dc: | |
119 | cp = "\x28\x38"; | |
120 | break; | |
121 | case 0x2c7: | |
122 | cp = "\x21\x26"; | |
123 | break; | |
124 | case 0x2c9: | |
125 | cp = "\x21\x25"; | |
126 | break; | |
127 | case 0x391 ... 0x3c9: | |
128 | cp = __gb2312_from_ucs4_tab2[ch - 0x391]; | |
129 | break; | |
130 | case 0x401 ... 0x451: | |
131 | cp = __gb2312_from_ucs4_tab3[ch - 0x401]; | |
132 | break; | |
133 | case 0x2015 ... 0x203b: | |
134 | cp = __gb2312_from_ucs4_tab4[ch - 0x2015]; | |
135 | break; | |
136 | case 0x2103 ... 0x22a5: | |
137 | cp = __gb2312_from_ucs4_tab5[ch - 0x2103]; | |
138 | break; | |
ffa156af | 139 | case 0x2312: |
8619129f UD |
140 | cp = "\x21\x50"; |
141 | break; | |
142 | case 0x2460 ... 0x249b: | |
143 | cp = __gb2312_from_ucs4_tab6[ch - 0x2460]; | |
144 | break; | |
145 | case 0x2500 ... 0x254b: | |
40b4c81d | 146 | buf[0] = '\x29'; |
ffa156af | 147 | buf[1] = '\x24' + (ch % 256); |
8619129f UD |
148 | break; |
149 | case 0x25a0: | |
150 | cp = "\x21\x76"; | |
151 | break; | |
152 | case 0x25a1: | |
153 | cp = "\x21\x75"; | |
154 | break; | |
155 | case 0x25b2: | |
156 | cp = "\x21\x78"; | |
157 | break; | |
158 | case 0x25b3: | |
159 | cp = "\x21\x77"; | |
160 | break; | |
161 | case 0x25c6: | |
162 | cp = "\x21\x74"; | |
163 | break; | |
164 | case 0x25c7: | |
165 | cp = "\x21\x73"; | |
166 | break; | |
167 | case 0x25cb: | |
168 | cp = "\x21\x70"; | |
169 | break; | |
170 | case 0x25ce: | |
171 | cp = "\x21\x72"; | |
172 | break; | |
173 | case 0x25cf: | |
174 | cp = "\x21\x71"; | |
175 | break; | |
176 | case 0x2605: | |
177 | cp = "\x21\x6f"; | |
178 | break; | |
179 | case 0x2606: | |
180 | cp = "\x21\x6e"; | |
181 | break; | |
182 | case 0x2640: | |
183 | cp = "\x21\x62"; | |
184 | break; | |
185 | case 0x2642: | |
186 | cp = "\x21\x61"; | |
187 | break; | |
188 | case 0x3000 ... 0x3129: | |
189 | cp = __gb2312_from_ucs4_tab7[ch - 0x3000]; | |
190 | break; | |
191 | case 0x3220 ... 0x3229: | |
40b4c81d UD |
192 | buf[0] = '\x22'; |
193 | buf[1] = '\x65' + (ch - 0x3220); | |
8619129f UD |
194 | break; |
195 | case 0x4e00 ... 0x9fa0: | |
196 | cp = __gb2312_from_ucs4_tab8[ch - 0x4e00]; | |
197 | break; | |
198 | case 0xff01 ... 0xff5e: | |
199 | cp = __gb2312_from_ucs4_tab9[ch - 0xff01]; | |
200 | break; | |
201 | case 0xffe0: | |
202 | cp = "\x21\x69"; | |
203 | break; | |
204 | case 0xffe1: | |
205 | cp = "\x21\x6a"; | |
206 | break; | |
207 | case 0xffe3: | |
208 | cp = "\x23\x7e"; | |
209 | break; | |
210 | case 0xffe5: | |
211 | cp = "\x23\x24"; | |
212 | break; | |
213 | default: | |
d64b6ad0 | 214 | return __UNKNOWN_10646_CHAR; |
40b4c81d | 215 | } |
40b4c81d | 216 | |
918b9d72 | 217 | if (cp[0] == '\0') |
d64b6ad0 | 218 | return __UNKNOWN_10646_CHAR; |
918b9d72 UD |
219 | |
220 | assert (cp[1] != '\0'); | |
221 | ||
222 | if (avail < 2) | |
40b4c81d UD |
223 | return 0; |
224 | ||
bc900b11 UD |
225 | s[0] = cp[0]; |
226 | s[1] = cp[1]; | |
40b4c81d UD |
227 | |
228 | return 2; | |
229 | } | |
230 | ||
231 | #endif /* gb2312.h */ |