release/src/router/libiconv/lib/cp949.h

   1 /*
   2  * Copyright (C) 1999-2001, 2005, 2007 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 Library General Public
   7  * License as published by the Free Software Foundation; either version 2
   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  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public
  16  * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
  17  * If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
  18  * Fifth Floor, Boston, MA 02110-1301, USA.
  19  */
  20
  21 /*
  22  * CP949 is EUC-KR, extended with UHC (Unified Hangul Code).
  23  *
  24  * Some variants of CP949 (in JDK, Windows-2000, ICU) also add:
  25  *
  26  * 2. Private area mappings:
  27  *
  28  *        code           Unicode
  29  *    0xC9{A1..FE}   U+E000..U+E05D
  30  *    0xFE{A1..FE}   U+E05E..U+E0BB
  31  *
  32  * We add them too because, although there are backward compatibility problems
  33  * when a character from a private area is moved to an official Unicode code
  34  * point, they are useful for some people in practice.
  35  */
  36
  37 #include "uhc_1.h"
  38 #include "uhc_2.h"
  39
  40 static int
  41 cp949_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
  42 {
  43   unsigned char c = *s;
  44   /* Code set 0 (ASCII) */
  45   if (c < 0x80)
  46     return ascii_mbtowc(conv,pwc,s,n);
  47   /* UHC part 1 */
  48   if (c >= 0x81 && c <= 0xa0)
  49     return uhc_1_mbtowc(conv,pwc,s,n);
  50   if (c >= 0xa1 && c < 0xff) {
  51     if (n < 2)
  52       return RET_TOOFEW(0);
  53     {
  54       unsigned char c2 = s[1];
  55       if (c2 < 0xa1)
  56         /* UHC part 2 */
  57         return uhc_2_mbtowc(conv,pwc,s,n);
  58       else if (c2 < 0xff && !(c == 0xa2 && c2 == 0xe8)) {
  59         /* Code set 1 (KS C 5601-1992, now KS X 1001:1998) */
  60         unsigned char buf[2];
  61         int ret;
  62         buf[0] = c-0x80; buf[1] = c2-0x80;
  63         ret = ksc5601_mbtowc(conv,pwc,buf,2);
  64         if (ret != RET_ILSEQ)
  65           return ret;
  66         /* User-defined characters */
  67         if (c == 0xc9) {
  68           *pwc = 0xe000 + (c2 - 0xa1);
  69           return 2;
  70         }
  71         if (c == 0xfe) {
  72           *pwc = 0xe05e + (c2 - 0xa1);
  73           return 2;
  74         }
  75       }
  76     }
  77   }
  78   return RET_ILSEQ;
  79 }
  80
  81 static int
  82 cp949_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
  83 {
  84   unsigned char buf[2];
  85   int ret;
  86
  87   /* Code set 0 (ASCII) */
  88   ret = ascii_wctomb(conv,r,wc,n);
  89   if (ret != RET_ILUNI)
  90     return ret;
  91
  92   /* Code set 1 (KS C 5601-1992, now KS X 1001:1998) */
  93   if (wc != 0x327e) {
  94     ret = ksc5601_wctomb(conv,buf,wc,2);
  95     if (ret != RET_ILUNI) {
  96       if (ret != 2) abort();
  97       if (n < 2)
  98         return RET_TOOSMALL;
  99       r[0] = buf[0]+0x80;
 100       r[1] = buf[1]+0x80;
 101       return 2;
 102     }
 103   }
 104
 105   /* UHC */
 106   if (wc >= 0xac00 && wc < 0xd7a4) {
 107     if (wc < 0xc8a5)
 108       return uhc_1_wctomb(conv,r,wc,n);
 109     else
 110       return uhc_2_wctomb(conv,r,wc,n);
 111   }
 112
 113   /* User-defined characters */
 114   if (wc >= 0xe000 && wc < 0xe0bc) {
 115     if (n < 2)
 116       return RET_TOOSMALL;
 117     if (wc < 0xe05e) {
 118       r[0] = 0xc9;
 119       r[1] = wc - 0xe000 + 0xa1;
 120     } else {
 121       r[0] = 0xfe;
 122       r[1] = wc - 0xe05e + 0xa1;
 123     }
 124     return 2;
 125   }
 126
 127   return RET_ILUNI;
 128 }