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2b474353 | 1 | /* Access functions for CNS 11643, plane 1 handling. |
bfff8b1b | 2 | Copyright (C) 1998-2017 Free Software Foundation, Inc. |
2b474353 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. | |
2b474353 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. |
2b474353 | 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/>. */ | |
2b474353 UD |
19 | |
20 | #include <stdint.h> | |
8619129f | 21 | #include <gconv.h> |
2b474353 UD |
22 | |
23 | /* Table for CNS 11643, plane 1 to UCS4 conversion. */ | |
8619129f | 24 | extern const uint16_t __cns11643l1_to_ucs4_tab[]; |
2b474353 UD |
25 | |
26 | ||
9b26f5c4 | 27 | static inline uint32_t |
dd9423a6 | 28 | __attribute ((always_inline)) |
15a2315c UD |
29 | cns11643l1_to_ucs4 (const unsigned char **s, size_t avail, |
30 | unsigned char offset) | |
2b474353 UD |
31 | { |
32 | unsigned char ch = *(*s); | |
33 | unsigned char ch2; | |
34 | int idx; | |
35 | ||
36 | if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x7d) | |
d64b6ad0 | 37 | return __UNKNOWN_10646_CHAR; |
2b474353 UD |
38 | |
39 | if (avail < 2) | |
40 | return 0; | |
41 | ||
42 | ch2 = (*s)[1]; | |
43 | if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f) | |
d64b6ad0 | 44 | return __UNKNOWN_10646_CHAR; |
2b474353 UD |
45 | |
46 | idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset); | |
b79f74cd | 47 | if (idx > 0x21f2) |
d64b6ad0 | 48 | return __UNKNOWN_10646_CHAR; |
2b474353 UD |
49 | |
50 | (*s) += 2; | |
51 | ||
d64b6ad0 | 52 | return __cns11643l1_to_ucs4_tab[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR); |
2b474353 UD |
53 | } |
54 | ||
55 | ||
56 | /* Tables for the UCS4 -> CNS conversion. */ | |
8619129f UD |
57 | extern const char __cns11643l1_from_ucs4_tab1[][2]; |
58 | extern const char __cns11643l1_from_ucs4_tab2[][2]; | |
59 | extern const char __cns11643l1_from_ucs4_tab3[][2]; | |
60 | extern const char __cns11643l1_from_ucs4_tab4[][2]; | |
61 | extern const char __cns11643l1_from_ucs4_tab5[][2]; | |
62 | extern const char __cns11643l1_from_ucs4_tab6[][2]; | |
63 | extern const char __cns11643l1_from_ucs4_tab7[][2]; | |
64 | extern const char __cns11643l1_from_ucs4_tab8[][2]; | |
65 | extern const char __cns11643l1_from_ucs4_tab9[][2]; | |
66 | extern const char __cns11643l1_from_ucs4_tab10[][2]; | |
67 | extern const char __cns11643l1_from_ucs4_tab11[][2]; | |
68 | extern const char __cns11643l1_from_ucs4_tab12[][2]; | |
69 | extern const char __cns11643l1_from_ucs4_tab13[][2]; | |
70 | extern const char __cns11643l1_from_ucs4_tab14[][2]; | |
2b474353 UD |
71 | |
72 | ||
73 | static inline size_t | |
dd9423a6 | 74 | __attribute ((always_inline)) |
15a2315c | 75 | ucs4_to_cns11643l1 (uint32_t wch, unsigned char *s, size_t avail) |
2b474353 UD |
76 | { |
77 | unsigned int ch = (unsigned int) wch; | |
78 | char buf[2]; | |
8619129f UD |
79 | const char *cp = buf; |
80 | ||
81 | switch (ch) | |
2b474353 | 82 | { |
8619129f UD |
83 | case 0xa7 ... 0xf7: |
84 | cp = __cns11643l1_from_ucs4_tab1[ch - 0xa7]; | |
85 | break; | |
86 | case 0x2c7 ... 0x2d9: | |
87 | cp = __cns11643l1_from_ucs4_tab2[ch - 0x2c7]; | |
88 | break; | |
89 | case 0x391 ... 0x3c9: | |
90 | cp = __cns11643l1_from_ucs4_tab3[ch - 0x391]; | |
9b26f5c4 | 91 | break; |
8619129f UD |
92 | case 0x2013 ... 0x203e: |
93 | cp = __cns11643l1_from_ucs4_tab4[ch - 0x2013]; | |
9b26f5c4 | 94 | break; |
8619129f UD |
95 | case 0x2103: |
96 | cp = "\x22\x6a"; | |
97 | break; | |
98 | case 0x2105: | |
99 | cp = "\x22\x22"; | |
100 | break; | |
101 | case 0x2109: | |
102 | cp = "\x22\x6b"; | |
103 | break; | |
104 | case 0x2160 ... 0x2169: | |
2b474353 UD |
105 | buf[0] = '\x24'; |
106 | buf[1] = '\x2b' + (ch - 0x2160); | |
8619129f UD |
107 | break; |
108 | case 0x2170 ... 0x2179: | |
2b474353 UD |
109 | buf[0] = '\x26'; |
110 | buf[1] = '\x35' + (ch - 0x2170); | |
8619129f | 111 | break; |
9b26f5c4 | 112 | case 0x2190 ... 0x2199: |
8619129f UD |
113 | cp = __cns11643l1_from_ucs4_tab5[ch - 0x2190]; |
114 | break; | |
115 | case 0x2215 ... 0x2267: | |
116 | cp = __cns11643l1_from_ucs4_tab6[ch - 0x2215]; | |
117 | break; | |
118 | case 0x22a5: | |
119 | cp = "\x22\x47"; | |
120 | break; | |
121 | case 0x22bf: | |
122 | cp = "\x22\x4a"; | |
123 | break; | |
124 | case 0x2400 ... 0x2421: | |
125 | cp = __cns11643l1_from_ucs4_tab7[ch - 0x2400]; | |
126 | break; | |
127 | case 0x2460 ... 0x247d: | |
128 | cp = __cns11643l1_from_ucs4_tab8[ch - 0x2460]; | |
129 | break; | |
130 | case 0x2500 ... 0x2642: | |
131 | cp = __cns11643l1_from_ucs4_tab9[ch - 0x2500]; | |
132 | break; | |
133 | case 0x3000 ... 0x3029: | |
134 | cp = __cns11643l1_from_ucs4_tab10[ch - 0x3000]; | |
135 | break; | |
136 | case 0x30fb: | |
137 | cp = "\x21\x26"; | |
138 | break; | |
139 | case 0x3105 ... 0x3129: | |
2b474353 | 140 | buf[0] = '\x25'; |
b79f74cd | 141 | buf[1] = '\x47' + (ch - 0x3105); |
8619129f UD |
142 | break; |
143 | case 0x32a3: | |
144 | cp = "\x22\x21"; | |
145 | break; | |
146 | case 0x338e ... 0x33d5: | |
147 | cp = __cns11643l1_from_ucs4_tab11[ch - 0x338e]; | |
148 | break; | |
149 | case 0x4e00 ... 0x9f9c: | |
150 | cp = __cns11643l1_from_ucs4_tab12[ch - 0x4e00]; | |
151 | break; | |
152 | case 0xfe30 ... 0xfe6b: | |
153 | cp = __cns11643l1_from_ucs4_tab13[ch - 0xfe30]; | |
154 | break; | |
155 | case 0xff01 ... 0xff5d: | |
156 | cp = __cns11643l1_from_ucs4_tab14[ch - 0xff01]; | |
157 | break; | |
158 | case 0xffe0: | |
159 | cp = "\x22\x66"; | |
160 | break; | |
161 | case 0xffe1: | |
162 | cp = "\x22\x67"; | |
163 | break; | |
164 | case 0xffe5: | |
165 | cp = "\x22\x64"; | |
166 | break; | |
167 | default: | |
d64b6ad0 | 168 | return __UNKNOWN_10646_CHAR; |
2b474353 | 169 | } |
2b474353 UD |
170 | |
171 | if (cp[0] == '\0') | |
d64b6ad0 | 172 | return __UNKNOWN_10646_CHAR; |
2b474353 UD |
173 | |
174 | if (avail < 2) | |
175 | return 0; | |
176 | ||
177 | s[0] = cp[0]; | |
178 | s[1] = cp[1]; | |
179 | ||
180 | return 2; | |
181 | } |