iconvdata/cns11643.h

   1 /* Access functions for CNS 11643 handling.
   2    Copyright (C) 1998-2020 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    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <stdint.h>
  21
  22
  23 /* Table for CNS 11643, plane 1 to UCS4 conversion.  */
  24 extern const uint16_t __cns11643l1_to_ucs4_tab[];
  25 /* Table for CNS 11643, plane 2 to UCS4 conversion.  */
  26 extern const uint16_t __cns11643l2_to_ucs4_tab[];
  27 /* Table for CNS 11643, plane 3 to UCS4 conversion.  */
  28 extern const uint32_t __cns11643l3_to_ucs4_tab[];
  29 /* Table for CNS 11643, plane 4 to UCS4 conversion.  */
  30 extern const uint32_t __cns11643l4_to_ucs4_tab[];
  31 /* Table for CNS 11643, plane 5 to UCS4 conversion.  */
  32 extern const uint32_t __cns11643l5_to_ucs4_tab[];
  33 /* Table for CNS 11643, plane 6 to UCS4 conversion.  */
  34 extern const uint32_t __cns11643l6_to_ucs4_tab[];
  35 /* Table for CNS 11643, plane 7 to UCS4 conversion.  */
  36 extern const uint32_t __cns11643l7_to_ucs4_tab[];
  37 /* Table for CNS 11643, plane 15 (old) to UCS4 conversion.  */
  38 extern const uint32_t __cns11643l15_to_ucs4_tab[];
  39
  40
  41 static inline uint32_t
  42 __attribute ((always_inline))
  43 cns11643_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset)
  44 {
  45   unsigned char ch = *(*s);
  46   unsigned char ch2;
  47   unsigned char ch3;
  48   uint32_t result;
  49   int idx;
  50
  51   if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x30)
  52     return __UNKNOWN_10646_CHAR;
  53
  54   if (avail < 3)
  55     return 0;
  56
  57   ch2 = (*s)[1];
  58   if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
  59     return __UNKNOWN_10646_CHAR;
  60
  61   ch3 = (*s)[2];
  62   if ((ch3 - offset) <= 0x20 || (ch3 - offset) >= 0x7f)
  63     return __UNKNOWN_10646_CHAR;
  64
  65   idx = (ch2 - 0x21 - offset) * 94 + (ch3 - 0x21 - offset);
  66
  67   switch (ch - 0x20 - offset)
  68     {
  69     case 1:
  70       if (idx > 0x21f2)
  71         return __UNKNOWN_10646_CHAR;
  72       result = __cns11643l1_to_ucs4_tab[idx];
  73       break;
  74     case 2:
  75       if (idx > 0x1de1)
  76         return __UNKNOWN_10646_CHAR;
  77       result = __cns11643l2_to_ucs4_tab[idx];
  78       break;
  79     case 3:
  80       if (idx > 0x19bd)
  81         return __UNKNOWN_10646_CHAR;
  82       result = __cns11643l3_to_ucs4_tab[idx];
  83       break;
  84     case 4:
  85       if (idx > 0x1c81)
  86         return __UNKNOWN_10646_CHAR;
  87       result = __cns11643l4_to_ucs4_tab[idx];
  88       break;
  89     case 5:
  90       if (idx > 0x219a)
  91         return __UNKNOWN_10646_CHAR;
  92       result = __cns11643l5_to_ucs4_tab[idx];
  93       break;
  94     case 6:
  95       if (idx > 0x18f3)
  96         return __UNKNOWN_10646_CHAR;
  97       result = __cns11643l6_to_ucs4_tab[idx];
  98       break;
  99     case 7:
 100       if (idx > 0x198a)
 101         return __UNKNOWN_10646_CHAR;
 102       result = __cns11643l7_to_ucs4_tab[idx];
 103       break;
 104     case 15:
 105       if (idx > 0x1c00)
 106         return __UNKNOWN_10646_CHAR;
 107       result = __cns11643l15_to_ucs4_tab[idx];
 108       break;
 109     default:
 110       return __UNKNOWN_10646_CHAR;
 111     }
 112
 113   if (result != L'\0')
 114     (*s) += 3;
 115   else
 116     result = __UNKNOWN_10646_CHAR;
 117
 118   return result;
 119 }
 120
 121
 122 /* Tables for the UCS4 -> CNS conversion.  */
 123 extern const char __cns11643l1_from_ucs4_tab1[][2];
 124 extern const char __cns11643l1_from_ucs4_tab2[][2];
 125 extern const char __cns11643l1_from_ucs4_tab3[][2];
 126 extern const char __cns11643l1_from_ucs4_tab4[][2];
 127 extern const char __cns11643l1_from_ucs4_tab5[][2];
 128 extern const char __cns11643l1_from_ucs4_tab6[][2];
 129 extern const char __cns11643l1_from_ucs4_tab7[][2];
 130 extern const char __cns11643l1_from_ucs4_tab8[][2];
 131 extern const char __cns11643l1_from_ucs4_tab9[][2];
 132 extern const char __cns11643l1_from_ucs4_tab10[][2];
 133 extern const char __cns11643l1_from_ucs4_tab11[][2];
 134 extern const char __cns11643l1_from_ucs4_tab12[][2];
 135 extern const char __cns11643l1_from_ucs4_tab13[][2];
 136 extern const char __cns11643l1_from_ucs4_tab14[][2];
 137 extern const char __cns11643_from_ucs4p0_tab[][3];
 138 extern const char __cns11643_from_ucs4p2_tab[][3];
 139 extern const char __cns11643_from_ucs4p2c_tab[][3];
 140
 141
 142 static inline size_t
 143 __attribute ((always_inline))
 144 ucs4_to_cns11643 (uint32_t wch, unsigned char *s, size_t avail)
 145 {
 146   unsigned int ch = (unsigned int) wch;
 147   char buf[2];
 148   const char *cp = buf;
 149   size_t needed = 2;
 150
 151   switch (ch)
 152     {
 153     case 0xa7 ... 0xf7:
 154       cp = __cns11643l1_from_ucs4_tab1[ch - 0xa7];
 155       break;
 156     case 0x2c7 ... 0x2d9:
 157       cp = __cns11643l1_from_ucs4_tab2[ch - 0x2c7];
 158       break;
 159     case 0x391 ... 0x3c9:
 160       cp = __cns11643l1_from_ucs4_tab3[ch - 0x391];
 161       break;
 162     case 0x2013 ... 0x203e:
 163       cp = __cns11643l1_from_ucs4_tab4[ch - 0x2013];
 164       break;
 165     case 0x2103:
 166       cp = "\x22\x6a";
 167       break;
 168     case 0x2105:
 169       cp = "\x22\x22";
 170       break;
 171     case 0x2109:
 172       cp = "\x22\x6b";
 173       break;
 174     case 0x2160 ... 0x2169:
 175       buf[0] = '\x24';
 176       buf[1] = '\x2b' + (ch - 0x2160);
 177       break;
 178     case 0x2170 ... 0x2179:
 179       buf[0] = '\x26';
 180       buf[1] = '\x35' + (ch - 0x2170);
 181       break;
 182     case 0x2190 ... 0x2199:
 183       cp = __cns11643l1_from_ucs4_tab5[ch - 0x2190];
 184       break;
 185     case 0x2215 ... 0x2267:
 186       cp = __cns11643l1_from_ucs4_tab6[ch - 0x2215];
 187       break;
 188     case 0x22a5:
 189       cp = "\x22\x47";
 190       break;
 191     case 0x22bf:
 192       cp = "\x22\x4a";
 193       break;
 194     case 0x2400 ... 0x2421:
 195       cp = __cns11643l1_from_ucs4_tab7[ch - 0x2400];
 196       break;
 197     case 0x2460 ... 0x247d:
 198       cp = __cns11643l1_from_ucs4_tab8[ch - 0x2460];
 199       break;
 200     case 0x2500 ... 0x2642:
 201       cp = __cns11643l1_from_ucs4_tab9[ch - 0x2500];
 202       break;
 203     case 0x3000 ... 0x3029:
 204       cp = __cns11643l1_from_ucs4_tab10[ch - 0x3000];
 205       break;
 206     case 0x30fb:
 207       cp = "\x21\x26";
 208       break;
 209     case 0x3105 ... 0x3129:
 210       buf[0] = '\x25';
 211       buf[1] = '\x47' + (ch - 0x3105);
 212       break;
 213     case 0x32a3:
 214       cp = "\x22\x21";
 215       break;
 216     case 0x338e ... 0x33d5:
 217       cp = __cns11643l1_from_ucs4_tab11[ch - 0x338e];
 218       break;
 219     case 0x4e00 ... 0x9f9c:
 220       cp = __cns11643l1_from_ucs4_tab12[ch - 0x4e00];
 221       if (cp[0] != '\0')
 222         break;
 223       /* Let's try the other planes.  */
 224       /* Fall through.  */
 225     case 0x3400 ... 0x4dff:
 226     case 0x9f9d ... 0x9fa5:
 227       /* Let's try the other planes.  */
 228       needed = 3;
 229       cp = __cns11643_from_ucs4p0_tab[ch - 0x3400];
 230       break;
 231     case 0xfa28:
 232       needed = 3;
 233       cp = "\x0f\x58\x4c";
 234       break;
 235     case 0xfe30 ... 0xfe6b:
 236       cp = __cns11643l1_from_ucs4_tab13[ch - 0xfe30];
 237       break;
 238     case 0xff01 ... 0xff5d:
 239       cp = __cns11643l1_from_ucs4_tab14[ch - 0xff01];
 240       break;
 241     case 0xffe0:
 242       cp = "\x22\x66";
 243       break;
 244     case 0xffe1:
 245       cp = "\x22\x67";
 246       break;
 247     case 0xffe5:
 248       cp = "\x22\x64";
 249       break;
 250     case 0x20000 ... 0x2a6d6:
 251       needed = 3;
 252       cp = __cns11643_from_ucs4p2_tab[ch - 0x20000];
 253       break;
 254     case 0x2f800 ... 0x2fa1d:
 255       needed = 3;
 256       cp = __cns11643_from_ucs4p2c_tab[ch - 0x2f800];
 257       break;
 258     default:
 259       return __UNKNOWN_10646_CHAR;
 260     }
 261
 262   if (cp[0] == '\0')
 263     return __UNKNOWN_10646_CHAR;
 264
 265   if (avail < needed)
 266     return 0;
 267
 268   s[0] = cp[0];
 269   s[1] = cp[1];
 270   if (needed == 3)
 271     s[2] = cp[2];
 272
 273   return needed;
 274 }