iconvdata/gb2312.h

   1 /* Access functions for GB2312 conversion.
   2    Copyright (C) 1998-2017 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 #ifndef _GB2312_H
  21 #define _GB2312_H       1
  22
  23 #include <gconv.h>
  24 #include <stdint.h>
  25 #include <assert.h>
  26
  27 /* Conversion table.  */
  28 extern const uint16_t __gb2312_to_ucs[];
  29
  30
  31 static inline uint32_t
  32 __attribute ((always_inline))
  33 gb2312_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset)
  34 {
  35   unsigned char ch = *(*s);
  36   unsigned char ch2;
  37   int idx;
  38
  39   if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x77)
  40     return __UNKNOWN_10646_CHAR;
  41
  42   if (avail < 2)
  43     return 0;
  44
  45   ch2 = (*s)[1];
  46   if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
  47     return __UNKNOWN_10646_CHAR;
  48
  49   idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);
  50   if (idx > 0x1ff1)
  51     return __UNKNOWN_10646_CHAR;
  52
  53   (*s) += 2;
  54
  55   return __gb2312_to_ucs[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR);
  56 }
  57
  58
  59 extern const char __gb2312_from_ucs4_tab1[][2];
  60 extern const char __gb2312_from_ucs4_tab2[][2];
  61 extern const char __gb2312_from_ucs4_tab3[][2];
  62 extern const char __gb2312_from_ucs4_tab4[][2];
  63 extern const char __gb2312_from_ucs4_tab5[][2];
  64 extern const char __gb2312_from_ucs4_tab6[][2];
  65 extern const char __gb2312_from_ucs4_tab7[][2];
  66 extern const char __gb2312_from_ucs4_tab8[][2];
  67 extern const char __gb2312_from_ucs4_tab9[][2];
  68
  69 static inline size_t
  70 __attribute ((always_inline))
  71 ucs4_to_gb2312 (uint32_t wch, unsigned char *s, size_t avail)
  72 {
  73   unsigned int ch = (unsigned int) wch;
  74   char buf[2];
  75   const char *cp = buf;
  76
  77   switch (ch)
  78     {
  79     case 0xa4 ... 0x101:
  80       cp = __gb2312_from_ucs4_tab1[ch - 0xa4];
  81       break;
  82     case 0x113:
  83       cp = "\x28\x25";
  84       break;
  85     case 0x11b:
  86       cp = "\x28\x27";
  87       break;
  88     case 0x12b:
  89       cp = "\x28\x29";
  90       break;
  91     case 0x14d:
  92       cp = "\x28\x2d";
  93       break;
  94     case 0x16b:
  95       cp = "\x28\x31";
  96       break;
  97     case 0x1ce:
  98       cp = "\x28\x23";
  99       break;
 100     case 0x1d0:
 101       cp = "\x28\x2b";
 102       break;
 103     case 0x1d2:
 104       cp = "\x28\x2f";
 105       break;
 106     case 0x1d4:
 107       cp = "\x28\x33";
 108       break;
 109     case 0x1d6:
 110       cp = "\x28\x35";
 111       break;
 112     case 0x1d8:
 113       cp = "\x28\x36";
 114       break;
 115     case 0x1da:
 116       cp = "\x28\x37";
 117       break;
 118     case 0x1dc:
 119       cp = "\x28\x38";
 120       break;
 121     case 0x2c7:
 122       cp = "\x21\x26";
 123       break;
 124     case 0x2c9:
 125       cp = "\x21\x25";
 126       break;
 127     case 0x391 ... 0x3c9:
 128       cp = __gb2312_from_ucs4_tab2[ch - 0x391];
 129       break;
 130     case 0x401 ... 0x451:
 131       cp = __gb2312_from_ucs4_tab3[ch - 0x401];
 132       break;
 133     case 0x2015 ... 0x203b:
 134       cp = __gb2312_from_ucs4_tab4[ch - 0x2015];
 135       break;
 136     case 0x2103 ... 0x22a5:
 137       cp = __gb2312_from_ucs4_tab5[ch - 0x2103];
 138       break;
 139     case 0x2312:
 140       cp = "\x21\x50";
 141       break;
 142     case 0x2460 ... 0x249b:
 143       cp = __gb2312_from_ucs4_tab6[ch - 0x2460];
 144       break;
 145     case 0x2500 ... 0x254b:
 146       buf[0] = '\x29';
 147       buf[1] = '\x24' + (ch % 256);
 148       break;
 149     case 0x25a0:
 150       cp = "\x21\x76";
 151       break;
 152     case 0x25a1:
 153       cp = "\x21\x75";
 154       break;
 155     case 0x25b2:
 156       cp = "\x21\x78";
 157       break;
 158     case 0x25b3:
 159       cp = "\x21\x77";
 160       break;
 161     case 0x25c6:
 162       cp = "\x21\x74";
 163       break;
 164     case 0x25c7:
 165       cp = "\x21\x73";
 166       break;
 167     case 0x25cb:
 168       cp = "\x21\x70";
 169       break;
 170     case 0x25ce:
 171       cp = "\x21\x72";
 172       break;
 173     case 0x25cf:
 174       cp = "\x21\x71";
 175       break;
 176     case 0x2605:
 177       cp = "\x21\x6f";
 178       break;
 179     case 0x2606:
 180       cp = "\x21\x6e";
 181       break;
 182     case 0x2640:
 183       cp = "\x21\x62";
 184       break;
 185     case 0x2642:
 186       cp = "\x21\x61";
 187       break;
 188     case 0x3000 ... 0x3129:
 189       cp = __gb2312_from_ucs4_tab7[ch - 0x3000];
 190       break;
 191     case 0x3220 ... 0x3229:
 192       buf[0] = '\x22';
 193       buf[1] = '\x65' + (ch - 0x3220);
 194       break;
 195     case 0x4e00 ... 0x9fa0:
 196       cp = __gb2312_from_ucs4_tab8[ch - 0x4e00];
 197       break;
 198     case 0xff01 ... 0xff5e:
 199       cp = __gb2312_from_ucs4_tab9[ch - 0xff01];
 200       break;
 201     case 0xffe0:
 202       cp = "\x21\x69";
 203       break;
 204     case 0xffe1:
 205       cp = "\x21\x6a";
 206       break;
 207     case 0xffe3:
 208       cp = "\x23\x7e";
 209       break;
 210     case 0xffe5:
 211       cp = "\x23\x24";
 212       break;
 213     default:
 214       return __UNKNOWN_10646_CHAR;
 215     }
 216
 217   if (cp[0] == '\0')
 218     return __UNKNOWN_10646_CHAR;
 219
 220   assert (cp[1] != '\0');
 221
 222   if (avail < 2)
 223     return 0;
 224
 225   s[0] = cp[0];
 226   s[1] = cp[1];
 227
 228   return 2;
 229 }
 230
 231 #endif  /* gb2312.h */