lib/gb18030ext.h

   1 /*
   2  * Copyright (C) 1999-2001, 2005, 2011, 2016, 2023 Free Software Foundation, Inc.
   3  * This file is part of the GNU LIBICONV Library.
   4  *
   5  * The GNU LIBICONV Library is free software; you can redistribute it
   6  * and/or modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either version 2.1
   8  * of the License, or (at your option) any later version.
   9  *
  10  * The GNU LIBICONV Library is distributed in the hope that it will be
  11  * useful, 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 LIBICONV Library; see the file COPYING.LIB.
  17  * If not, see <https://www.gnu.org/licenses/>.
  18  */
  19
  20 /*
  21  * GB18030 two-byte extension
  22  */
  23
  24 static const unsigned short gb18030ext_2uni_pagea9[13] = {
  25   /* 0xa9 */
  26   0x303e, 0x2ff0, 0x2ff1, 0x2ff2, 0x2ff3, 0x2ff4, 0x2ff5, 0x2ff6,
  27   0x2ff7, 0x2ff8, 0x2ff9, 0x2ffa, 0x2ffb,
  28 };
  29 static const unsigned int gb18030_2005_ext_2uni_pagefe[96] = {
  30   /* 0xfe */
  31    0xfffd,  0xfffd,  0xfffd,  0xfffd,  0xfffd,  0xfffd,  0xfffd,  0xfffd,
  32    0xfffd,  0xfffd,  0xfffd,  0xfffd,  0xfffd,  0xfffd,  0xfffd,  0xfffd,
  33    0x2e81, 0x20087, 0x20089, 0x200cc,  0x2e84,  0x3473,  0x3447,  0x2e88,
  34    0x2e8b,  0x9fb4,  0x359e,  0x361a,  0x360e,  0x2e8c,  0x2e97,  0x396e,
  35    0x3918,  0x9fb5,  0x39cf,  0x39df,  0x3a73,  0x39d0,  0x9fb6,  0x9fb7,
  36    0x3b4e,  0x3c6e,  0x3ce0,  0x2ea7, 0x215d7,  0x9fb8,  0x2eaa,  0x4056,
  37    0x415f,  0x2eae,  0x4337,  0x2eb3,  0x2eb6,  0x2eb7, 0x2298f,  0x43b1,
  38    0x43ac,  0x2ebb,  0x43dd,  0x44d6,  0x4661,  0x464c,  0x9fb9,  0x4723,
  39    0x4729,  0x477c,  0x478d,  0x2eca,  0x4947,  0x497a,  0x497d,  0x4982,
  40    0x4983,  0x4985,  0x4986,  0x499f,  0x499b,  0x49b7,  0x49b6,  0x9fba,
  41   0x241fe,  0x4ca3,  0x4c9f,  0x4ca0,  0x4ca1,  0x4c77,  0x4ca2,  0x4d13,
  42    0x4d14,  0x4d15,  0x4d16,  0x4d17,  0x4d18,  0x4d19,  0x4dae,  0x9fbb,
  43 };
  44
  45 static const unsigned short gb18030_2022_ext_2uni_pagefe[96] = {
  46   /* 0xfe */
  47   0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  48   0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  49   0x2e81, 0xe816, 0xe817, 0xe818, 0x2e84, 0x3473, 0x3447, 0x2e88,
  50   0x2e8b, 0x9fb4, 0x359e, 0x361a, 0x360e, 0x2e8c, 0x2e97, 0x396e,
  51   0x3918, 0x9fb5, 0x39cf, 0x39df, 0x3a73, 0x39d0, 0x9fb6, 0x9fb7,
  52   0x3b4e, 0x3c6e, 0x3ce0, 0x2ea7, 0xe831, 0x9fb8, 0x2eaa, 0x4056,
  53   0x415f, 0x2eae, 0x4337, 0x2eb3, 0x2eb6, 0x2eb7, 0xe83b, 0x43b1,
  54   0x43ac, 0x2ebb, 0x43dd, 0x44d6, 0x4661, 0x464c, 0x9fb9, 0x4723,
  55   0x4729, 0x477c, 0x478d, 0x2eca, 0x4947, 0x497a, 0x497d, 0x4982,
  56   0x4983, 0x4985, 0x4986, 0x499f, 0x499b, 0x49b7, 0x49b6, 0x9fba,
  57   0xe855, 0x4ca3, 0x4c9f, 0x4ca0, 0x4ca1, 0x4c77, 0x4ca2, 0x4d13,
  58   0x4d14, 0x4d15, 0x4d16, 0x4d17, 0x4d18, 0x4d19, 0x4dae, 0x9fbb,
  59 };
  60
  61 static int
  62 gb18030_2005_ext_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
  63 {
  64   unsigned char c1 = s[0];
  65   if ((c1 == 0xa2) || (c1 >= 0xa4 && c1 <= 0xa9) || (c1 == 0xd7) || (c1 == 0xfe)) {
  66     if (n >= 2) {
  67       unsigned char c2 = s[1];
  68       if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0x80 && c2 < 0xff)) {
  69         unsigned int i = 190 * (c1 - 0x81) + (c2 - (c2 >= 0x80 ? 0x41 : 0x40));
  70         unsigned int wc = 0xfffd;
  71         switch (c1) {
  72           case 0xa2:
  73             if (i >= 6376 && i <= 6381) /* 0xA2AB..0xA2B0 */
  74               wc = 0xe766 + (i - 6376);
  75             else if (i == 6432) /* 0xA2E3 */
  76               wc = 0x20ac;
  77             else if (i == 6433) /* 0xA2E4 */
  78               wc = 0xe76d;
  79             else if (i >= 6444 && i <= 6445) /* 0xA2EF..0xA2F0 */
  80               wc = 0xe76e + (i - 6444);
  81             else if (i >= 6458 && i <= 6459) /* 0xA2FD..0xA2FE */
  82               wc = 0xe770 + (i - 6458);
  83             break;
  84           case 0xa4:
  85             if (i >= 6829 && i <= 6839) /* 0xA4F4..0xA4FE */
  86               wc = 0xe772 + (i - 6829);
  87             break;
  88           case 0xa5:
  89             if (i >= 7022 && i <= 7029) /* 0xA5F7..0xA5FE */
  90               wc = 0xe77d + (i - 7022);
  91             break;
  92           case 0xa6:
  93             if (i >= 7150 && i <= 7157) /* 0xA6B9..0xA6C0 */
  94               wc = 0xe785 + (i - 7150);
  95             else if (i >= 7183 && i <= 7184) /* 0xA6DA..0xA6DB */
  96               wc = 0xfe12 - (i - 7183);
  97             else if (i >= 7182 && i <= 7190) /* 0xA6D9..0xA6DF */
  98               wc = 0xfe10 + (i - 7182);
  99             else if (i >= 7201 && i <= 7202) /* 0xA6EC..0xA6ED */
 100               wc = 0xfe17 + (i - 7201);
 101             else if (i == 7208) /* 0xA6F3 */
 102               wc = 0xfe19;
 103             else if (i >= 7211 && i <= 7219) /* 0xA6F6..0xA6FE */
 104               wc = 0xe797 + (i - 7211);
 105             break;
 106           case 0xa7:
 107             if (i >= 7349 && i <= 7363) /* 0xA7C2..0xA7D0 */
 108               wc = 0xe7a0 + (i - 7349);
 109             else if (i >= 7397 && i <= 7409) /* 0xA7F2..0xA7FE */
 110               wc = 0xe7af + (i - 7397);
 111             break;
 112           case 0xa8:
 113             if (i >= 7495 && i <= 7505) /* 0xA896..0xA8A0 */
 114               wc = 0xe7bc + (i - 7495);
 115             else if (i == 7533) /* 0xA8BC */
 116               wc = 0x1e3f;
 117             else if (i == 7536) /* 0xA8BF */
 118               wc = 0x01f9;
 119             else if (i >= 7538 && i <= 7541) /* 0xA8C1..0xA8C4 */
 120               wc = 0xe7c9 + (i - 7538);
 121             else if (i >= 7579 && i <= 7599) /* 0xA8EA..0xA8FE */
 122               wc = 0xe7cd + (i - 7579);
 123             break;
 124           case 0xa9:
 125             if (i == 7624) /* 0xA958 */
 126               wc = 0xe7e2;
 127             else if (i == 7627) /* 0xA95B */
 128               wc = 0xe7e3;
 129             else if (i >= 7629 && i <= 7631) /* 0xA95D..0xA95F */
 130               wc = 0xe7e4 + (i - 7629);
 131             else if (i >= 7672 && i < 7685) /* 0xA989..0xA995 */
 132               wc = gb18030ext_2uni_pagea9[i-7672];
 133             else if (i >= 7686 && i <= 7698) /* 0xA997..0xA9A3 */
 134               wc = 0xe7f4 + (i - 7686);
 135             else if (i >= 7775 && i <= 7789) /* 0xA9F0..0xA9FE */
 136               wc = 0xe801 + (i - 7775);
 137             break;
 138           case 0xd7:
 139             if (i >= 16525 && i <= 16529) /* 0xD7FA..0xD7FE */
 140               wc = 0xe810 + (i - 16525);
 141             break;
 142           case 0xfe:
 143             if (i < 23846)
 144               wc = gb18030_2005_ext_2uni_pagefe[i-23750];
 145             break;
 146           default:
 147             break;
 148         }
 149         if (wc != 0xfffd) {
 150           *pwc = (ucs4_t) wc;
 151           return 2;
 152         }
 153       }
 154       return RET_ILSEQ;
 155     }
 156     return RET_TOOFEW(0);
 157   }
 158   return RET_ILSEQ;
 159 }
 160
 161 static int
 162 gb18030_2022_ext_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
 163 {
 164   unsigned char c1 = s[0];
 165   if ((c1 == 0xa2) || (c1 >= 0xa4 && c1 <= 0xa9) || (c1 == 0xd7) || (c1 == 0xfe)) {
 166     if (n >= 2) {
 167       unsigned char c2 = s[1];
 168       if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0x80 && c2 < 0xff)) {
 169         unsigned int i = 190 * (c1 - 0x81) + (c2 - (c2 >= 0x80 ? 0x41 : 0x40));
 170         unsigned int wc = 0xfffd;
 171         switch (c1) {
 172           case 0xa2:
 173             if (i >= 6376 && i <= 6381) /* 0xA2AB..0xA2B0 */
 174               wc = 0xe766 + (i - 6376);
 175             else if (i == 6432) /* 0xA2E3 */
 176               wc = 0x20ac;
 177             else if (i == 6433) /* 0xA2E4 */
 178               wc = 0xe76d;
 179             else if (i >= 6444 && i <= 6445) /* 0xA2EF..0xA2F0 */
 180               wc = 0xe76e + (i - 6444);
 181             else if (i >= 6458 && i <= 6459) /* 0xA2FD..0xA2FE */
 182               wc = 0xe770 + (i - 6458);
 183             break;
 184           case 0xa4:
 185             if (i >= 6829 && i <= 6839) /* 0xA4F4..0xA4FE */
 186               wc = 0xe772 + (i - 6829);
 187             break;
 188           case 0xa5:
 189             if (i >= 7022 && i <= 7029) /* 0xA5F7..0xA5FE */
 190               wc = 0xe77d + (i - 7022);
 191             break;
 192           case 0xa6:
 193             if (i >= 7150 && i <= 7157) /* 0xA6B9..0xA6C0 */
 194               wc = 0xe785 + (i - 7150);
 195             else if (i >= 7183 && i <= 7184) /* 0xA6DA..0xA6DB */
 196               wc = 0xfe12 - (i - 7183);
 197             else if (i >= 7182 && i <= 7190) /* 0xA6D9..0xA6DF */
 198               wc = 0xfe10 + (i - 7182);
 199             else if (i >= 7201 && i <= 7202) /* 0xA6EC..0xA6ED */
 200               wc = 0xfe17 + (i - 7201);
 201             else if (i == 7208) /* 0xA6F3 */
 202               wc = 0xfe19;
 203             else if (i >= 7211 && i <= 7219) /* 0xA6F6..0xA6FE */
 204               wc = 0xe797 + (i - 7211);
 205             break;
 206           case 0xa7:
 207             if (i >= 7349 && i <= 7363) /* 0xA7C2..0xA7D0 */
 208               wc = 0xe7a0 + (i - 7349);
 209             else if (i >= 7397 && i <= 7409) /* 0xA7F2..0xA7FE */
 210               wc = 0xe7af + (i - 7397);
 211             break;
 212           case 0xa8:
 213             if (i >= 7495 && i <= 7505) /* 0xA896..0xA8A0 */
 214               wc = 0xe7bc + (i - 7495);
 215             else if (i == 7533) /* 0xA8BC */
 216               wc = 0x1e3f;
 217             else if (i == 7536) /* 0xA8BF */
 218               wc = 0x01f9;
 219             else if (i >= 7538 && i <= 7541) /* 0xA8C1..0xA8C4 */
 220               wc = 0xe7c9 + (i - 7538);
 221             else if (i >= 7579 && i <= 7599) /* 0xA8EA..0xA8FE */
 222               wc = 0xe7cd + (i - 7579);
 223             break;
 224           case 0xa9:
 225             if (i == 7624) /* 0xA958 */
 226               wc = 0xe7e2;
 227             else if (i == 7627) /* 0xA95B */
 228               wc = 0xe7e3;
 229             else if (i >= 7629 && i <= 7631) /* 0xA95D..0xA95F */
 230               wc = 0xe7e4 + (i - 7629);
 231             else if (i >= 7672 && i < 7685) /* 0xA989..0xA995 */
 232               wc = gb18030ext_2uni_pagea9[i-7672];
 233             else if (i >= 7686 && i <= 7698) /* 0xA997..0xA9A3 */
 234               wc = 0xe7f4 + (i - 7686);
 235             else if (i >= 7775 && i <= 7789) /* 0xA9F0..0xA9FE */
 236               wc = 0xe801 + (i - 7775);
 237             break;
 238           case 0xd7:
 239             if (i >= 16525 && i <= 16529) /* 0xD7FA..0xD7FE */
 240               wc = 0xe810 + (i - 16525);
 241             break;
 242           case 0xfe:
 243             if (i < 23846)
 244               wc = gb18030_2022_ext_2uni_pagefe[i-23750];
 245             break;
 246           default:
 247             break;
 248         }
 249         if (wc != 0xfffd) {
 250           *pwc = (ucs4_t) wc;
 251           return 2;
 252         }
 253       }
 254       return RET_ILSEQ;
 255     }
 256     return RET_TOOFEW(0);
 257   }
 258   return RET_ILSEQ;
 259 }
 260
 261 static const unsigned short gb18030ext_page2e[80] = {
 262   0x0000, 0xfe50, 0x0000, 0x0000, 0xfe54, 0x0000, 0x0000, 0x0000, /*0x80-0x87*/
 263   0xfe57, 0x0000, 0x0000, 0xfe58, 0xfe5d, 0x0000, 0x0000, 0x0000, /*0x88-0x8f*/
 264   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xfe5e, /*0x90-0x97*/
 265   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x98-0x9f*/
 266   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xfe6b, /*0xa0-0xa7*/
 267   0x0000, 0x0000, 0xfe6e, 0x0000, 0x0000, 0x0000, 0xfe71, 0x0000, /*0xa8-0xaf*/
 268   0x0000, 0x0000, 0x0000, 0xfe73, 0x0000, 0x0000, 0xfe74, 0xfe75, /*0xb0-0xb7*/
 269   0x0000, 0x0000, 0x0000, 0xfe79, 0x0000, 0x0000, 0x0000, 0x0000, /*0xb8-0xbf*/
 270   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0xc0-0xc7*/
 271   0x0000, 0x0000, 0xfe84, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0xc8-0xcf*/
 272 };
 273 static const unsigned short gb18030ext_page2f[16] = {
 274   0xa98a, 0xa98b, 0xa98c, 0xa98d, 0xa98e, 0xa98f, 0xa990, 0xa991, /*0xf0-0xf7*/
 275   0xa992, 0xa993, 0xa994, 0xa995, 0x0000, 0x0000, 0x0000, 0x0000, /*0xf8-0xff*/
 276 };
 277 static const unsigned short gb18030ext_page34[56] = {
 278   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xfe56, /*0x40-0x47*/
 279   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x48-0x4f*/
 280   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x50-0x57*/
 281   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x58-0x5f*/
 282   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x60-0x67*/
 283   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x68-0x6f*/
 284   0x0000, 0x0000, 0x0000, 0xfe55, 0x0000, 0x0000, 0x0000, 0x0000, /*0x70-0x77*/
 285 };
 286 static const unsigned short gb18030ext_page36[24] = {
 287   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xfe5c, 0x0000, /*0x08-0x0f*/
 288   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x10-0x17*/
 289   0x0000, 0x0000, 0xfe5b, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x18-0x1f*/
 290 };
 291 static const unsigned short gb18030ext_page39[24] = {
 292   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xfe62, /*0xc8-0xcf*/
 293   0xfe65, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0xd0-0xd7*/
 294   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xfe63, /*0xd8-0xdf*/
 295 };
 296 static const unsigned short gb18030ext_page43[56] = {
 297   0x0000, 0x0000, 0x0000, 0x0000, 0xfe78, 0x0000, 0x0000, 0x0000, /*0xa8-0xaf*/
 298   0x0000, 0xfe77, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0xb0-0xb7*/
 299   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0xb8-0xbf*/
 300   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0xc0-0xc7*/
 301   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0xc8-0xcf*/
 302   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0xd0-0xd7*/
 303   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xfe7a, 0x0000, 0x0000, /*0xd8-0xdf*/
 304 };
 305 static const unsigned short gb18030ext_page46[32] = {
 306   0x0000, 0x0000, 0x0000, 0x0000, 0xfe7d, 0x0000, 0x0000, 0x0000, /*0x48-0x4f*/
 307   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x50-0x57*/
 308   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x58-0x5f*/
 309   0x0000, 0xfe7c, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x60-0x67*/
 310 };
 311 static const unsigned short gb18030ext_page47_1[16] = {
 312   0x0000, 0x0000, 0x0000, 0xfe80, 0x0000, 0x0000, 0x0000, 0x0000, /*0x20-0x27*/
 313   0x0000, 0xfe81, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x28-0x2f*/
 314 };
 315 static const unsigned short gb18030ext_page47_2[24] = {
 316   0x0000, 0x0000, 0x0000, 0x0000, 0xfe82, 0x0000, 0x0000, 0x0000, /*0x78-0x7f*/
 317   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x80-0x87*/
 318   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xfe83, 0x0000, 0x0000, /*0x88-0x8f*/
 319 };
 320 static const unsigned short gb18030ext_page49[120] = {
 321   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xfe85, /*0x40-0x47*/
 322   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x48-0x4f*/
 323   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x50-0x57*/
 324   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x58-0x5f*/
 325   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x60-0x67*/
 326   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x68-0x6f*/
 327   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x70-0x77*/
 328   0x0000, 0x0000, 0xfe86, 0x0000, 0x0000, 0xfe87, 0x0000, 0x0000, /*0x78-0x7f*/
 329   0x0000, 0x0000, 0xfe88, 0xfe89, 0x0000, 0xfe8a, 0xfe8b, 0x0000, /*0x80-0x87*/
 330   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x88-0x8f*/
 331   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x90-0x97*/
 332   0x0000, 0x0000, 0x0000, 0xfe8d, 0x0000, 0x0000, 0x0000, 0xfe8c, /*0x98-0x9f*/
 333   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0xa0-0xa7*/
 334   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0xa8-0xaf*/
 335   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xfe8f, 0xfe8e, /*0xb0-0xb7*/
 336 };
 337 static const unsigned short gb18030ext_page4c[56] = {
 338   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xfe96, /*0x70-0x77*/
 339   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x78-0x7f*/
 340   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x80-0x87*/
 341   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x88-0x8f*/
 342   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x90-0x97*/
 343   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xfe93, /*0x98-0x9f*/
 344   0xfe94, 0xfe95, 0xfe97, 0xfe92, 0x0000, 0x0000, 0x0000, 0x0000, /*0xa0-0xa7*/
 345 };
 346 static const unsigned short gb18030ext_page4d[16] = {
 347   0x0000, 0x0000, 0x0000, 0xfe98, 0xfe99, 0xfe9a, 0xfe9b, 0xfe9c, /*0x10-0x17*/
 348   0xfe9d, 0xfe9e, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x18-0x1f*/
 349 };
 350 static const unsigned short gb18030ext_page9f[16] = {
 351   0x0000, 0x0000, 0x0000, 0x0000, 0xfe59, 0xfe61, 0xfe66, 0xfe67, /*0xb0-0xb7*/
 352   0xfe6d, 0xfe7e, 0xfe90, 0xfea0, 0x0000, 0x0000, 0x0000, 0x0000, /*0xb8-0xbf*/
 353 };
 354 static const unsigned short gb18030ext_pagefe[16] = {
 355   0xa6d9, 0xa6db, 0xa6da, 0xa6dc, 0xa6dd, 0xa6de, 0xa6df, 0xa6ec, /*0x10-0x17*/
 356   0xa6ed, 0xa6f3, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x18-0x1f*/
 357 };
 358
 359 static int
 360 gb18030ext_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
 361 {
 362   if (n >= 2) {
 363     unsigned short c = 0;
 364     if (wc == 0x01f9)
 365       c = 0xa8bf;
 366     else if (wc == 0x1e3f)
 367       c = 0xa8bc;
 368     else if (wc == 0x20ac)
 369       c = 0xa2e3;
 370     else if (wc >= 0x2e80 && wc < 0x2ed0)
 371       c = gb18030ext_page2e[wc-0x2e80];
 372     else if (wc >= 0x2ff0 && wc < 0x3000)
 373       c = gb18030ext_page2f[wc-0x2ff0];
 374     else if (wc == 0x303e)
 375       c = 0xa989;
 376     else if (wc >= 0x3440 && wc < 0x3478)
 377       c = gb18030ext_page34[wc-0x3440];
 378     else if (wc == 0x359e)
 379       c = 0xfe5a;
 380     else if (wc >= 0x3608 && wc < 0x3620)
 381       c = gb18030ext_page36[wc-0x3608];
 382     else if (wc == 0x3918)
 383       c = 0xfe60;
 384     else if (wc == 0x396e)
 385       c = 0xfe5f;
 386     else if (wc >= 0x39c8 && wc < 0x39e0)
 387       c = gb18030ext_page39[wc-0x39c8];
 388     else if (wc == 0x3a73)
 389       c = 0xfe64;
 390     else if (wc == 0x3b4e)
 391       c = 0xfe68;
 392     else if (wc == 0x3c6e)
 393       c = 0xfe69;
 394     else if (wc == 0x3ce0)
 395       c = 0xfe6a;
 396     else if (wc == 0x4056)
 397       c = 0xfe6f;
 398     else if (wc == 0x415f)
 399       c = 0xfe70;
 400     else if (wc == 0x4337)
 401       c = 0xfe72;
 402     else if (wc >= 0x43a8 && wc < 0x43e0)
 403       c = gb18030ext_page43[wc-0x43a8];
 404     else if (wc == 0x44d6)
 405       c = 0xfe7b;
 406     else if (wc >= 0x4648 && wc < 0x4668)
 407       c = gb18030ext_page46[wc-0x4648];
 408     else if (wc >= 0x4720 && wc < 0x4730)
 409       c = gb18030ext_page47_1[wc-0x4720];
 410     else if (wc >= 0x4778 && wc < 0x4790)
 411       c = gb18030ext_page47_2[wc-0x4778];
 412     else if (wc >= 0x4940 && wc < 0x49b8)
 413       c = gb18030ext_page49[wc-0x4940];
 414     else if (wc >= 0x4c70 && wc < 0x4ca8)
 415       c = gb18030ext_page4c[wc-0x4c70];
 416     else if (wc >= 0x4d10 && wc < 0x4d20)
 417       c = gb18030ext_page4d[wc-0x4d10];
 418     else if (wc == 0x4dae)
 419       c = 0xfe9f;
 420     else if (wc >= 0x9fb4 && wc < 0x9fbc)
 421       c = gb18030ext_page9f[wc-0x9fb0];
 422     else if (wc >= 0xfe10 && wc < 0xfe1a)
 423       c = gb18030ext_pagefe[wc-0xfe10];
 424     if (c != 0) {
 425       r[0] = (c >> 8); r[1] = (c & 0xff);
 426       return 2;
 427     }
 428     return RET_ILUNI;
 429   }
 430   return RET_TOOSMALL;
 431 }