iconvdata/cns11643l1.h

   1 /* Access functions for CNS 11643, plane 1 handling.
   2    Copyright (C) 1998-2023 Free Software Foundation, Inc.
   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
   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.
   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
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <stdint.h>
  20 #include <gconv.h>
  21
  22 /* Table for CNS 11643, plane 1 to UCS4 conversion.  */
  23 extern const uint16_t __cns11643l1_to_ucs4_tab[];
  24
  25
  26 static inline uint32_t
  27 __attribute ((always_inline))
  28 cns11643l1_to_ucs4 (const unsigned char **s, size_t avail,
  29                     unsigned char offset)
  30 {
  31   unsigned char ch = *(*s);
  32   unsigned char ch2;
  33   int idx;
  34
  35   if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x7d)
  36     return __UNKNOWN_10646_CHAR;
  37
  38   if (avail < 2)
  39     return 0;
  40
  41   ch2 = (*s)[1];
  42   if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
  43     return __UNKNOWN_10646_CHAR;
  44
  45   idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);
  46   if (idx > 0x21f2)
  47     return __UNKNOWN_10646_CHAR;
  48
  49   (*s) += 2;
  50
  51   return __cns11643l1_to_ucs4_tab[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR);
  52 }
  53
  54
  55 /* Tables for the UCS4 -> CNS conversion.  */
  56 extern const char __cns11643l1_from_ucs4_tab1[][2];
  57 extern const char __cns11643l1_from_ucs4_tab2[][2];
  58 extern const char __cns11643l1_from_ucs4_tab3[][2];
  59 extern const char __cns11643l1_from_ucs4_tab4[][2];
  60 extern const char __cns11643l1_from_ucs4_tab5[][2];
  61 extern const char __cns11643l1_from_ucs4_tab6[][2];
  62 extern const char __cns11643l1_from_ucs4_tab7[][2];
  63 extern const char __cns11643l1_from_ucs4_tab8[][2];
  64 extern const char __cns11643l1_from_ucs4_tab9[][2];
  65 extern const char __cns11643l1_from_ucs4_tab10[][2];
  66 extern const char __cns11643l1_from_ucs4_tab11[][2];
  67 extern const char __cns11643l1_from_ucs4_tab12[][2];
  68 extern const char __cns11643l1_from_ucs4_tab13[][2];
  69 extern const char __cns11643l1_from_ucs4_tab14[][2];
  70
  71
  72 static inline size_t
  73 __attribute ((always_inline))
  74 ucs4_to_cns11643l1 (uint32_t wch, unsigned char *s, size_t avail)
  75 {
  76   unsigned int ch = (unsigned int) wch;
  77   char buf[2];
  78   const char *cp = buf;
  79
  80   switch (ch)
  81     {
  82     case 0xa7 ... 0xf7:
  83       cp = __cns11643l1_from_ucs4_tab1[ch - 0xa7];
  84       break;
  85     case 0x2c7 ... 0x2d9:
  86       cp = __cns11643l1_from_ucs4_tab2[ch - 0x2c7];
  87       break;
  88     case 0x391 ... 0x3c9:
  89       cp = __cns11643l1_from_ucs4_tab3[ch - 0x391];
  90       break;
  91     case 0x2013 ... 0x203e:
  92       cp = __cns11643l1_from_ucs4_tab4[ch - 0x2013];
  93       break;
  94     case 0x2103:
  95       cp = "\x22\x6a";
  96       break;
  97     case 0x2105:
  98       cp = "\x22\x22";
  99       break;
 100     case 0x2109:
 101       cp = "\x22\x6b";
 102       break;
 103     case 0x2160 ... 0x2169:
 104       buf[0] = '\x24';
 105       buf[1] = '\x2b' + (ch - 0x2160);
 106       break;
 107     case 0x2170 ... 0x2179:
 108       buf[0] = '\x26';
 109       buf[1] = '\x35' + (ch - 0x2170);
 110       break;
 111     case 0x2190 ... 0x2199:
 112       cp = __cns11643l1_from_ucs4_tab5[ch - 0x2190];
 113       break;
 114     case 0x2215 ... 0x2267:
 115       cp = __cns11643l1_from_ucs4_tab6[ch - 0x2215];
 116       break;
 117     case 0x22a5:
 118       cp = "\x22\x47";
 119       break;
 120     case 0x22bf:
 121       cp = "\x22\x4a";
 122       break;
 123     case 0x2400 ... 0x2421:
 124       cp = __cns11643l1_from_ucs4_tab7[ch - 0x2400];
 125       break;
 126     case 0x2460 ... 0x247d:
 127       cp = __cns11643l1_from_ucs4_tab8[ch - 0x2460];
 128       break;
 129     case 0x2500 ... 0x2642:
 130       cp = __cns11643l1_from_ucs4_tab9[ch - 0x2500];
 131       break;
 132     case 0x3000 ... 0x3029:
 133       cp = __cns11643l1_from_ucs4_tab10[ch - 0x3000];
 134       break;
 135     case 0x30fb:
 136       cp = "\x21\x26";
 137       break;
 138     case 0x3105 ... 0x3129:
 139       buf[0] = '\x25';
 140       buf[1] = '\x47' + (ch - 0x3105);
 141       break;
 142     case 0x32a3:
 143       cp = "\x22\x21";
 144       break;
 145     case 0x338e ... 0x33d5:
 146       cp = __cns11643l1_from_ucs4_tab11[ch - 0x338e];
 147       break;
 148     case 0x4e00 ... 0x9f9c:
 149       cp = __cns11643l1_from_ucs4_tab12[ch - 0x4e00];
 150       break;
 151     case 0xfe30 ... 0xfe6b:
 152       cp = __cns11643l1_from_ucs4_tab13[ch - 0xfe30];
 153       break;
 154     case 0xff01 ... 0xff5d:
 155       cp = __cns11643l1_from_ucs4_tab14[ch - 0xff01];
 156       break;
 157     case 0xffe0:
 158       cp = "\x22\x66";
 159       break;
 160     case 0xffe1:
 161       cp = "\x22\x67";
 162       break;
 163     case 0xffe5:
 164       cp = "\x22\x64";
 165       break;
 166     default:
 167       return __UNKNOWN_10646_CHAR;
 168     }
 169
 170   if (cp[0] == '\0')
 171     return __UNKNOWN_10646_CHAR;
 172
 173   if (avail < 2)
 174     return 0;
 175
 176   s[0] = cp[0];
 177   s[1] = cp[1];
 178
 179   return 2;
 180 }