iconvdata/cns11643.h

   1 /* Access functions for CNS 11643 handling.
   2    Copyright (C) 1998-2022 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
  21
  22 /* Table for CNS 11643, plane 1 to UCS4 conversion.  */
  23 extern const uint16_t __cns11643l1_to_ucs4_tab[];
  24 /* Table for CNS 11643, plane 2 to UCS4 conversion.  */
  25 extern const uint16_t __cns11643l2_to_ucs4_tab[];
  26 /* Table for CNS 11643, plane 3 to UCS4 conversion.  */
  27 extern const uint32_t __cns11643l3_to_ucs4_tab[];
  28 /* Table for CNS 11643, plane 4 to UCS4 conversion.  */
  29 extern const uint32_t __cns11643l4_to_ucs4_tab[];
  30 /* Table for CNS 11643, plane 5 to UCS4 conversion.  */
  31 extern const uint32_t __cns11643l5_to_ucs4_tab[];
  32 /* Table for CNS 11643, plane 6 to UCS4 conversion.  */
  33 extern const uint32_t __cns11643l6_to_ucs4_tab[];
  34 /* Table for CNS 11643, plane 7 to UCS4 conversion.  */
  35 extern const uint32_t __cns11643l7_to_ucs4_tab[];
  36 /* Table for CNS 11643, plane 15 (old) to UCS4 conversion.  */
  37 extern const uint32_t __cns11643l15_to_ucs4_tab[];
  38
  39
  40 static inline uint32_t
  41 __attribute ((always_inline))
  42 cns11643_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset)
  43 {
  44   unsigned char ch = *(*s);
  45   unsigned char ch2;
  46   unsigned char ch3;
  47   uint32_t result;
  48   int idx;
  49
  50   if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x30)
  51     return __UNKNOWN_10646_CHAR;
  52
  53   if (avail < 3)
  54     return 0;
  55
  56   ch2 = (*s)[1];
  57   if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
  58     return __UNKNOWN_10646_CHAR;
  59
  60   ch3 = (*s)[2];
  61   if ((ch3 - offset) <= 0x20 || (ch3 - offset) >= 0x7f)
  62     return __UNKNOWN_10646_CHAR;
  63
  64   idx = (ch2 - 0x21 - offset) * 94 + (ch3 - 0x21 - offset);
  65
  66   switch (ch - 0x20 - offset)
  67     {
  68     case 1:
  69       if (idx > 0x21f2)
  70         return __UNKNOWN_10646_CHAR;
  71       result = __cns11643l1_to_ucs4_tab[idx];
  72       break;
  73     case 2:
  74       if (idx > 0x1de1)
  75         return __UNKNOWN_10646_CHAR;
  76       result = __cns11643l2_to_ucs4_tab[idx];
  77       break;
  78     case 3:
  79       if (idx > 0x19bd)
  80         return __UNKNOWN_10646_CHAR;
  81       result = __cns11643l3_to_ucs4_tab[idx];
  82       break;
  83     case 4:
  84       if (idx > 0x1c81)
  85         return __UNKNOWN_10646_CHAR;
  86       result = __cns11643l4_to_ucs4_tab[idx];
  87       break;
  88     case 5:
  89       if (idx > 0x219a)
  90         return __UNKNOWN_10646_CHAR;
  91       result = __cns11643l5_to_ucs4_tab[idx];
  92       break;
  93     case 6:
  94       if (idx > 0x18f3)
  95         return __UNKNOWN_10646_CHAR;
  96       result = __cns11643l6_to_ucs4_tab[idx];
  97       break;
  98     case 7:
  99       if (idx > 0x198a)
 100         return __UNKNOWN_10646_CHAR;
 101       result = __cns11643l7_to_ucs4_tab[idx];
 102       break;
 103     case 15:
 104       if (idx > 0x1c00)
 105         return __UNKNOWN_10646_CHAR;
 106       result = __cns11643l15_to_ucs4_tab[idx];
 107       break;
 108     default:
 109       return __UNKNOWN_10646_CHAR;
 110     }
 111
 112   if (result != L'\0')
 113     (*s) += 3;
 114   else
 115     result = __UNKNOWN_10646_CHAR;
 116
 117   return result;
 118 }
 119
 120
 121 /* Tables for the UCS4 -> CNS conversion.  */
 122 extern const char __cns11643l1_from_ucs4_tab1[][2];
 123 extern const char __cns11643l1_from_ucs4_tab2[][2];
 124 extern const char __cns11643l1_from_ucs4_tab3[][2];
 125 extern const char __cns11643l1_from_ucs4_tab4[][2];
 126 extern const char __cns11643l1_from_ucs4_tab5[][2];
 127 extern const char __cns11643l1_from_ucs4_tab6[][2];
 128 extern const char __cns11643l1_from_ucs4_tab7[][2];
 129 extern const char __cns11643l1_from_ucs4_tab8[][2];
 130 extern const char __cns11643l1_from_ucs4_tab9[][2];
 131 extern const char __cns11643l1_from_ucs4_tab10[][2];
 132 extern const char __cns11643l1_from_ucs4_tab11[][2];
 133 extern const char __cns11643l1_from_ucs4_tab12[][2];
 134 extern const char __cns11643l1_from_ucs4_tab13[][2];
 135 extern const char __cns11643l1_from_ucs4_tab14[][2];
 136 extern const char __cns11643_from_ucs4p0_tab[][3];
 137 extern const char __cns11643_from_ucs4p2_tab[][3];
 138 extern const char __cns11643_from_ucs4p2c_tab[][3];
 139
 140
 141 static inline size_t
 142 __attribute ((always_inline))
 143 ucs4_to_cns11643 (uint32_t wch, unsigned char *s, size_t avail)
 144 {
 145   unsigned int ch = (unsigned int) wch;
 146   char buf[2];
 147   const char *cp = buf;
 148   size_t needed = 2;
 149
 150   switch (ch)
 151     {
 152     case 0xa7 ... 0xf7:
 153       cp = __cns11643l1_from_ucs4_tab1[ch - 0xa7];
 154       break;
 155     case 0x2c7 ... 0x2d9:
 156       cp = __cns11643l1_from_ucs4_tab2[ch - 0x2c7];
 157       break;
 158     case 0x391 ... 0x3c9:
 159       cp = __cns11643l1_from_ucs4_tab3[ch - 0x391];
 160       break;
 161     case 0x2013 ... 0x203e:
 162       cp = __cns11643l1_from_ucs4_tab4[ch - 0x2013];
 163       break;
 164     case 0x2103:
 165       cp = "\x22\x6a";
 166       break;
 167     case 0x2105:
 168       cp = "\x22\x22";
 169       break;
 170     case 0x2109:
 171       cp = "\x22\x6b";
 172       break;
 173     case 0x2160 ... 0x2169:
 174       buf[0] = '\x24';
 175       buf[1] = '\x2b' + (ch - 0x2160);
 176       break;
 177     case 0x2170 ... 0x2179:
 178       buf[0] = '\x26';
 179       buf[1] = '\x35' + (ch - 0x2170);
 180       break;
 181     case 0x2190 ... 0x2199:
 182       cp = __cns11643l1_from_ucs4_tab5[ch - 0x2190];
 183       break;
 184     case 0x2215 ... 0x2267:
 185       cp = __cns11643l1_from_ucs4_tab6[ch - 0x2215];
 186       break;
 187     case 0x22a5:
 188       cp = "\x22\x47";
 189       break;
 190     case 0x22bf:
 191       cp = "\x22\x4a";
 192       break;
 193     case 0x2400 ... 0x2421:
 194       cp = __cns11643l1_from_ucs4_tab7[ch - 0x2400];
 195       break;
 196     case 0x2460 ... 0x247d:
 197       cp = __cns11643l1_from_ucs4_tab8[ch - 0x2460];
 198       break;
 199     case 0x2500 ... 0x2642:
 200       cp = __cns11643l1_from_ucs4_tab9[ch - 0x2500];
 201       break;
 202     case 0x3000 ... 0x3029:
 203       cp = __cns11643l1_from_ucs4_tab10[ch - 0x3000];
 204       break;
 205     case 0x30fb:
 206       cp = "\x21\x26";
 207       break;
 208     case 0x3105 ... 0x3129:
 209       buf[0] = '\x25';
 210       buf[1] = '\x47' + (ch - 0x3105);
 211       break;
 212     case 0x32a3:
 213       cp = "\x22\x21";
 214       break;
 215     case 0x338e ... 0x33d5:
 216       cp = __cns11643l1_from_ucs4_tab11[ch - 0x338e];
 217       break;
 218     case 0x4e00 ... 0x9f9c:
 219       cp = __cns11643l1_from_ucs4_tab12[ch - 0x4e00];
 220       if (cp[0] != '\0')
 221         break;
 222       /* Let's try the other planes.  */
 223       /* Fall through.  */
 224     case 0x3400 ... 0x4dff:
 225     case 0x9f9d ... 0x9fa5:
 226       /* Let's try the other planes.  */
 227       needed = 3;
 228       cp = __cns11643_from_ucs4p0_tab[ch - 0x3400];
 229       break;
 230     case 0xfa28:
 231       needed = 3;
 232       cp = "\x0f\x58\x4c";
 233       break;
 234     case 0xfe30 ... 0xfe6b:
 235       cp = __cns11643l1_from_ucs4_tab13[ch - 0xfe30];
 236       break;
 237     case 0xff01 ... 0xff5d:
 238       cp = __cns11643l1_from_ucs4_tab14[ch - 0xff01];
 239       break;
 240     case 0xffe0:
 241       cp = "\x22\x66";
 242       break;
 243     case 0xffe1:
 244       cp = "\x22\x67";
 245       break;
 246     case 0xffe5:
 247       cp = "\x22\x64";
 248       break;
 249     case 0x20000 ... 0x2a6d6:
 250       needed = 3;
 251       cp = __cns11643_from_ucs4p2_tab[ch - 0x20000];
 252       break;
 253     case 0x2f800 ... 0x2fa1d:
 254       needed = 3;
 255       cp = __cns11643_from_ucs4p2c_tab[ch - 0x2f800];
 256       break;
 257     default:
 258       return __UNKNOWN_10646_CHAR;
 259     }
 260
 261   if (cp[0] == '\0')
 262     return __UNKNOWN_10646_CHAR;
 263
 264   if (avail < needed)
 265     return 0;
 266
 267   s[0] = cp[0];
 268   s[1] = cp[1];
 269   if (needed == 3)
 270     s[2] = cp[2];
 271
 272   return needed;
 273 }