iconvdata/cns11643l1.h

   1 /* Access functions for CNS 11643, plane 1 handling.
   2    Copyright (C) 1998, 1999, 2000, 2003 Free Software Foundation, Inc.
   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
   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.
  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
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <stdint.h>
  21 #include <gconv.h>
  22
  23 /* Table for CNS 11643, plane 1 to UCS4 conversion.  */
  24 extern const uint16_t __cns11643l1_to_ucs4_tab[];
  25
  26
  27 static inline uint32_t
  28 __attribute ((always_inline))
  29 cns11643l1_to_ucs4 (const unsigned char **s, size_t avail,
  30                     unsigned char offset)
  31 {
  32   unsigned char ch = *(*s);
  33   unsigned char ch2;
  34   int idx;
  35
  36   if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x7d)
  37     return __UNKNOWN_10646_CHAR;
  38
  39   if (avail < 2)
  40     return 0;
  41
  42   ch2 = (*s)[1];
  43   if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
  44     return __UNKNOWN_10646_CHAR;
  45
  46   idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);
  47   if (idx > 0x21f2)
  48     return __UNKNOWN_10646_CHAR;
  49
  50   (*s) += 2;
  51
  52   return __cns11643l1_to_ucs4_tab[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR);
  53 }
  54
  55
  56 /* Tables for the UCS4 -> CNS conversion.  */
  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];
  71
  72
  73 static inline size_t
  74 __attribute ((always_inline))
  75 ucs4_to_cns11643l1 (uint32_t wch, unsigned char *s, size_t avail)
  76 {
  77   unsigned int ch = (unsigned int) wch;
  78   char buf[2];
  79   const char *cp = buf;
  80
  81   switch (ch)
  82     {
  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];
  91       break;
  92     case 0x2013 ... 0x203e:
  93       cp = __cns11643l1_from_ucs4_tab4[ch - 0x2013];
  94       break;
  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:
 105       buf[0] = '\x24';
 106       buf[1] = '\x2b' + (ch - 0x2160);
 107       break;
 108     case 0x2170 ... 0x2179:
 109       buf[0] = '\x26';
 110       buf[1] = '\x35' + (ch - 0x2170);
 111       break;
 112     case 0x2190 ... 0x2199:
 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:
 140       buf[0] = '\x25';
 141       buf[1] = '\x47' + (ch - 0x3105);
 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:
 168       return __UNKNOWN_10646_CHAR;
 169     }
 170
 171   if (cp[0] == '\0')
 172     return __UNKNOWN_10646_CHAR;
 173
 174   if (avail < 2)
 175     return 0;
 176
 177   s[0] = cp[0];
 178   s[1] = cp[1];
 179
 180   return 2;
 181 }