1 /* Access functions for GB2312 conversion.
2 Copyright (C) 1998, 1999, 2003 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
6 The GNU C Library is free software; you can redistribute it and/or
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.
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
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
28 /* Conversion table. */
29 extern const uint16_t __gb2312_to_ucs[];
32 static inline uint32_t
33 __attribute ((always_inline))
34 gb2312_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset)
36 unsigned char ch = *(*s);
40 if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x77)
41 return __UNKNOWN_10646_CHAR;
47 if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
48 return __UNKNOWN_10646_CHAR;
50 idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);
52 return __UNKNOWN_10646_CHAR;
56 return __gb2312_to_ucs[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR);
60 extern const char __gb2312_from_ucs4_tab1[][2];
61 extern const char __gb2312_from_ucs4_tab2[][2];
62 extern const char __gb2312_from_ucs4_tab3[][2];
63 extern const char __gb2312_from_ucs4_tab4[][2];
64 extern const char __gb2312_from_ucs4_tab5[][2];
65 extern const char __gb2312_from_ucs4_tab6[][2];
66 extern const char __gb2312_from_ucs4_tab7[][2];
67 extern const char __gb2312_from_ucs4_tab8[][2];
68 extern const char __gb2312_from_ucs4_tab9[][2];
71 __attribute ((always_inline))
72 ucs4_to_gb2312 (uint32_t wch, unsigned char *s, size_t avail)
74 unsigned int ch = (unsigned int) wch;
81 cp = __gb2312_from_ucs4_tab1[ch - 0xa4];
128 case 0x391 ... 0x3c9:
129 cp = __gb2312_from_ucs4_tab2[ch - 0x391];
131 case 0x401 ... 0x451:
132 cp = __gb2312_from_ucs4_tab3[ch - 0x401];
134 case 0x2015 ... 0x203b:
135 cp = __gb2312_from_ucs4_tab4[ch - 0x2015];
137 case 0x2103 ... 0x22a5:
138 cp = __gb2312_from_ucs4_tab5[ch - 0x2103];
143 case 0x2460 ... 0x249b:
144 cp = __gb2312_from_ucs4_tab6[ch - 0x2460];
146 case 0x2500 ... 0x254b:
148 buf[1] = '\x24' + (ch % 256);
189 case 0x3000 ... 0x3129:
190 cp = __gb2312_from_ucs4_tab7[ch - 0x3000];
192 case 0x3220 ... 0x3229:
194 buf[1] = '\x65' + (ch - 0x3220);
196 case 0x4e00 ... 0x9fa0:
197 cp = __gb2312_from_ucs4_tab8[ch - 0x4e00];
199 case 0xff01 ... 0xff5e:
200 cp = __gb2312_from_ucs4_tab9[ch - 0xff01];
215 return __UNKNOWN_10646_CHAR;
219 return __UNKNOWN_10646_CHAR;
221 assert (cp[1] != '\0');
232 #endif /* gb2312.h */