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a44d2393 | 1 | /* Access functions for KS C 5601-1992 based encoding conversion. |
06c17c78 | 2 | Copyright (C) 1998, 1999, 2000, 2003, 2007 Free Software Foundation, Inc. |
a44d2393 UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
a44d2393 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
a44d2393 | 14 | |
41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
a44d2393 UD |
19 | |
20 | #ifndef _KSC5601_H | |
21 | #define _KSC5601_H 1 | |
22 | ||
23 | #define KSC5601_HANGUL 2350 | |
24 | #define KSC5601_HANJA 4888 | |
06c17c78 | 25 | #define KSC5601_SYMBOL 989 |
a44d2393 UD |
26 | |
27 | #include <gconv.h> | |
2aea1d79 | 28 | #include <stdint.h> |
a44d2393 | 29 | |
918b9d72 UD |
30 | /* Structure to map from UCS to KSC. This structure should be packed |
31 | on all platforms. */ | |
32 | struct map | |
33 | { | |
34 | uint16_t ucs; | |
35 | char val[2]; | |
36 | }; | |
37 | ||
a44d2393 | 38 | /* Conversion table. */ |
8619129f UD |
39 | extern const uint16_t __ksc5601_hangul_to_ucs[KSC5601_HANGUL]; |
40 | extern const uint16_t __ksc5601_sym_to_ucs[]; | |
918b9d72 | 41 | extern const struct map __ksc5601_sym_from_ucs[KSC5601_SYMBOL]; |
8619129f | 42 | extern const uint16_t __ksc5601_hanja_to_ucs[KSC5601_HANJA]; |
918b9d72 | 43 | extern const struct map __ksc5601_hanja_from_ucs[KSC5601_HANJA]; |
a44d2393 UD |
44 | |
45 | ||
8619129f | 46 | static inline uint32_t |
dd9423a6 | 47 | __attribute ((always_inline)) |
918b9d72 | 48 | ksc5601_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset) |
a44d2393 | 49 | { |
bd805dba | 50 | unsigned char ch = **s; |
a44d2393 UD |
51 | unsigned char ch2; |
52 | int idx; | |
53 | ||
54 | /* row 94(0x7e) and row 41(0x49) are user-defined area in KS C 5601 */ | |
55 | ||
918b9d72 UD |
56 | if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) >= 0x7e |
57 | || (ch - offset) == 0x49) | |
d64b6ad0 | 58 | return __UNKNOWN_10646_CHAR; |
a44d2393 | 59 | |
918b9d72 UD |
60 | if (avail < 2) |
61 | return 0; | |
62 | ||
63 | ch2 = (*s)[1]; | |
64 | if (ch2 < offset || (ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f) | |
d64b6ad0 | 65 | return __UNKNOWN_10646_CHAR; |
a44d2393 | 66 | |
918b9d72 | 67 | idx = (ch - offset - 0x21) * 94 + (ch2 - offset - 0x21); |
a44d2393 UD |
68 | |
69 | /* 1410 = 15 * 94 , 3760 = 40 * 94 | |
70 | Hangul in KS C 5601 : row 16 - row 40 */ | |
71 | ||
bd805dba | 72 | *s += 2; |
918b9d72 | 73 | |
bd805dba | 74 | if (idx >= 1410 && idx < 1410 + KSC5601_HANGUL) |
918b9d72 | 75 | return (__ksc5601_hangul_to_ucs[idx - 1410] |
b0f1ca68 | 76 | ?: (*s -= 2, __UNKNOWN_10646_CHAR)); |
66175fa8 | 77 | else if (idx >= 3854) |
a44d2393 | 78 | /* Hanja : row 42 - row 93 : 3854 = 94 * (42-1) */ |
918b9d72 | 79 | return (__ksc5601_hanja_to_ucs[idx - 3854] |
b0f1ca68 | 80 | ?: (*s -= 2, __UNKNOWN_10646_CHAR)); |
bd805dba | 81 | else if (idx <= 1114) |
b0f1ca68 | 82 | return __ksc5601_sym_to_ucs[idx] ?: (*s -= 2, __UNKNOWN_10646_CHAR); |
bd805dba | 83 | |
b0f1ca68 | 84 | *s -= 2; |
bd805dba | 85 | return __UNKNOWN_10646_CHAR; |
a44d2393 UD |
86 | } |
87 | ||
88 | static inline size_t | |
dd9423a6 | 89 | __attribute ((always_inline)) |
bc900b11 | 90 | ucs4_to_ksc5601_hangul (uint32_t wch, unsigned char *s, size_t avail) |
a44d2393 | 91 | { |
8619129f | 92 | int l = 0; |
8619129f UD |
93 | int u = KSC5601_HANGUL - 1; |
94 | uint32_t try; | |
a44d2393 UD |
95 | |
96 | while (l <= u) | |
97 | { | |
fed8f7f7 | 98 | int m = (l + u) / 2; |
918b9d72 | 99 | try = (uint32_t) __ksc5601_hangul_to_ucs[m]; |
a44d2393 UD |
100 | if (try > wch) |
101 | u = m - 1; | |
102 | else if (try < wch) | |
103 | l= m + 1; | |
104 | else | |
105 | { | |
918b9d72 UD |
106 | if (avail < 2) |
107 | return 0; | |
108 | ||
bc900b11 UD |
109 | s[0] = (m / 94) + 0x30; |
110 | s[1] = (m % 94) + 0x21; | |
918b9d72 | 111 | |
a44d2393 UD |
112 | return 2; |
113 | } | |
114 | } | |
918b9d72 | 115 | |
d64b6ad0 | 116 | return __UNKNOWN_10646_CHAR; |
a44d2393 UD |
117 | } |
118 | ||
119 | ||
120 | static inline size_t | |
dd9423a6 | 121 | __attribute ((always_inline)) |
bc900b11 | 122 | ucs4_to_ksc5601_hanja (uint32_t wch, unsigned char *s, size_t avail) |
a44d2393 | 123 | { |
8619129f | 124 | int l = 0; |
8619129f UD |
125 | int u = KSC5601_HANJA - 1; |
126 | uint32_t try; | |
a44d2393 UD |
127 | |
128 | while (l <= u) | |
129 | { | |
fed8f7f7 | 130 | int m = (l + u) / 2; |
918b9d72 | 131 | try = (uint32_t) __ksc5601_hanja_from_ucs[m].ucs; |
a44d2393 UD |
132 | if (try > wch) |
133 | u=m-1; | |
134 | else if (try < wch) | |
135 | l = m + 1; | |
136 | else | |
137 | { | |
918b9d72 UD |
138 | if (avail < 2) |
139 | return 0; | |
140 | ||
bc900b11 UD |
141 | s[0] = __ksc5601_hanja_from_ucs[m].val[0]; |
142 | s[1] = __ksc5601_hanja_from_ucs[m].val[1]; | |
918b9d72 | 143 | |
a44d2393 UD |
144 | return 2; |
145 | } | |
146 | } | |
918b9d72 | 147 | |
d64b6ad0 | 148 | return __UNKNOWN_10646_CHAR; |
a44d2393 UD |
149 | } |
150 | ||
151 | static inline size_t | |
dd9423a6 | 152 | __attribute ((always_inline)) |
bc900b11 | 153 | ucs4_to_ksc5601_sym (uint32_t wch, unsigned char *s, size_t avail) |
a44d2393 UD |
154 | { |
155 | int l = 0; | |
a44d2393 | 156 | int u = KSC5601_SYMBOL - 1; |
8619129f | 157 | uint32_t try; |
a44d2393 UD |
158 | |
159 | while (l <= u) | |
160 | { | |
fed8f7f7 | 161 | int m = (l + u) / 2; |
918b9d72 | 162 | try = __ksc5601_sym_from_ucs[m].ucs; |
a44d2393 UD |
163 | if (try > wch) |
164 | u = m - 1; | |
165 | else if (try < wch) | |
166 | l = m + 1; | |
167 | else | |
168 | { | |
918b9d72 UD |
169 | if (avail < 2) |
170 | return 0; | |
171 | ||
bc900b11 UD |
172 | s[0] = __ksc5601_sym_from_ucs[m].val[0]; |
173 | s[1] = __ksc5601_sym_from_ucs[m].val[1]; | |
918b9d72 | 174 | |
a44d2393 UD |
175 | return 2; |
176 | } | |
177 | } | |
918b9d72 | 178 | |
d64b6ad0 | 179 | return __UNKNOWN_10646_CHAR; |
a44d2393 UD |
180 | } |
181 | ||
182 | ||
a44d2393 | 183 | static inline size_t |
dd9423a6 | 184 | __attribute ((always_inline)) |
bc900b11 | 185 | ucs4_to_ksc5601 (uint32_t wch, unsigned char *s, size_t avail) |
a44d2393 | 186 | { |
918b9d72 | 187 | if (wch >= 0xac00 && wch <= 0xd7a3) |
bc900b11 | 188 | return ucs4_to_ksc5601_hangul (wch, s, avail); |
918b9d72 UD |
189 | else if ((wch >= 0x4e00 && wch <= 0x9fff) |
190 | || (wch >= 0xf900 && wch <= 0xfa0b)) | |
191 | return ucs4_to_ksc5601_hanja (wch, s, avail); | |
a44d2393 | 192 | else |
918b9d72 | 193 | return ucs4_to_ksc5601_sym (wch, s, avail); |
a44d2393 UD |
194 | } |
195 | ||
196 | #endif /* ksc5601.h */ |