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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <stdint.h>
  22 #include <gconv.h>
  23
  24 /* Table for CNS 11643, plane 1 to UCS4 conversion.  */
  25 extern const uint16_t __cns11643l1_to_ucs4_tab[];
  26
  27
  28 static inline uint32_t
  29 __attribute ((always_inline))
  30 cns11643l1_to_ucs4 (const unsigned char **s, size_t avail,
  31                     unsigned char offset)
  32 {
  33   unsigned char ch = *(*s);
  34   unsigned char ch2;
  35   int idx;
  36
  37   if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x7d)
  38     return __UNKNOWN_10646_CHAR;
  39
  40   if (avail < 2)
  41     return 0;
  42
  43   ch2 = (*s)[1];
  44   if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
  45     return __UNKNOWN_10646_CHAR;
  46
  47   idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);
  48   if (idx > 0x21f2)
  49     return __UNKNOWN_10646_CHAR;
  50
  51   (*s) += 2;
  52
  53   return __cns11643l1_to_ucs4_tab[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR);
  54 }
  55
  56
  57 /* Tables for the UCS4 -> CNS conversion.  */
  58 extern const char __cns11643l1_from_ucs4_tab1[][2];
  59 extern const char __cns11643l1_from_ucs4_tab2[][2];
  60 extern const char __cns11643l1_from_ucs4_tab3[][2];
  61 extern const char __cns11643l1_from_ucs4_tab4[][2];
  62 extern const char __cns11643l1_from_ucs4_tab5[][2];
  63 extern const char __cns11643l1_from_ucs4_tab6[][2];
  64 extern const char __cns11643l1_from_ucs4_tab7[][2];
  65 extern const char __cns11643l1_from_ucs4_tab8[][2];
  66 extern const char __cns11643l1_from_ucs4_tab9[][2];
  67 extern const char __cns11643l1_from_ucs4_tab10[][2];
  68 extern const char __cns11643l1_from_ucs4_tab11[][2];
  69 extern const char __cns11643l1_from_ucs4_tab12[][2];
  70 extern const char __cns11643l1_from_ucs4_tab13[][2];
  71 extern const char __cns11643l1_from_ucs4_tab14[][2];
  72
  73
  74 static inline size_t
  75 __attribute ((always_inline))
  76 ucs4_to_cns11643l1 (uint32_t wch, unsigned char *s, size_t avail)
  77 {
  78   unsigned int ch = (unsigned int) wch;
  79   char buf[2];
  80   const char *cp = buf;
  81
  82   switch (ch)
  83     {
  84     case 0xa7 ... 0xf7:
  85       cp = __cns11643l1_from_ucs4_tab1[ch - 0xa7];
  86       break;
  87     case 0x2c7 ... 0x2d9:
  88       cp = __cns11643l1_from_ucs4_tab2[ch - 0x2c7];
  89       break;
  90     case 0x391 ... 0x3c9:
  91       cp = __cns11643l1_from_ucs4_tab3[ch - 0x391];
  92       break;
  93     case 0x2013 ... 0x203e:
  94       cp = __cns11643l1_from_ucs4_tab4[ch - 0x2013];
  95       break;
  96     case 0x2103:
  97       cp = "\x22\x6a";
  98       break;
  99     case 0x2105:
 100       cp = "\x22\x22";
 101       break;
 102     case 0x2109:
 103       cp = "\x22\x6b";
 104       break;
 105     case 0x2160 ... 0x2169:
 106       buf[0] = '\x24';
 107       buf[1] = '\x2b' + (ch - 0x2160);
 108       break;
 109     case 0x2170 ... 0x2179:
 110       buf[0] = '\x26';
 111       buf[1] = '\x35' + (ch - 0x2170);
 112       break;
 113     case 0x2190 ... 0x2199:
 114       cp = __cns11643l1_from_ucs4_tab5[ch - 0x2190];
 115       break;
 116     case 0x2215 ... 0x2267:
 117       cp = __cns11643l1_from_ucs4_tab6[ch - 0x2215];
 118       break;
 119     case 0x22a5:
 120       cp = "\x22\x47";
 121       break;
 122     case 0x22bf:
 123       cp = "\x22\x4a";
 124       break;
 125     case 0x2400 ... 0x2421:
 126       cp = __cns11643l1_from_ucs4_tab7[ch - 0x2400];
 127       break;
 128     case 0x2460 ... 0x247d:
 129       cp = __cns11643l1_from_ucs4_tab8[ch - 0x2460];
 130       break;
 131     case 0x2500 ... 0x2642:
 132       cp = __cns11643l1_from_ucs4_tab9[ch - 0x2500];
 133       break;
 134     case 0x3000 ... 0x3029:
 135       cp = __cns11643l1_from_ucs4_tab10[ch - 0x3000];
 136       break;
 137     case 0x30fb:
 138       cp = "\x21\x26";
 139       break;
 140     case 0x3105 ... 0x3129:
 141       buf[0] = '\x25';
 142       buf[1] = '\x47' + (ch - 0x3105);
 143       break;
 144     case 0x32a3:
 145       cp = "\x22\x21";
 146       break;
 147     case 0x338e ... 0x33d5:
 148       cp = __cns11643l1_from_ucs4_tab11[ch - 0x338e];
 149       break;
 150     case 0x4e00 ... 0x9f9c:
 151       cp = __cns11643l1_from_ucs4_tab12[ch - 0x4e00];
 152       break;
 153     case 0xfe30 ... 0xfe6b:
 154       cp = __cns11643l1_from_ucs4_tab13[ch - 0xfe30];
 155       break;
 156     case 0xff01 ... 0xff5d:
 157       cp = __cns11643l1_from_ucs4_tab14[ch - 0xff01];
 158       break;
 159     case 0xffe0:
 160       cp = "\x22\x66";
 161       break;
 162     case 0xffe1:
 163       cp = "\x22\x67";
 164       break;
 165     case 0xffe5:
 166       cp = "\x22\x64";
 167       break;
 168     default:
 169       return __UNKNOWN_10646_CHAR;
 170     }
 171
 172   if (cp[0] == '\0')
 173     return __UNKNOWN_10646_CHAR;
 174
 175   if (avail < 2)
 176     return 0;
 177
 178   s[0] = cp[0];
 179   s[1] = cp[1];
 180
 181   return 2;
 182 }