lib/cp949.h

   1 /*
   2  * Copyright (C) 1999-2001 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., 59 Temple Place -
  18  * Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22  * CP949 is EUC-KR, extended with UHC (Unified Hangul Code).
  23  */
  24
  25 #include "uhc_1.h"
  26 #include "uhc_2.h"
  27
  28 static int
  29 cp949_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
  30 {
  31   unsigned char c = *s;
  32   /* Code set 0 (ASCII) */
  33   if (c < 0x80)
  34     return ascii_mbtowc(conv,pwc,s,n);
  35   /* UHC part 1 */
  36   if (c >= 0x81 && c <= 0xa0)
  37     return uhc_1_mbtowc(conv,pwc,s,n);
  38   if (c >= 0xa1 && c < 0xff) {
  39     if (n < 2)
  40       return RET_TOOFEW(0);
  41     {
  42       unsigned char c2 = s[1];
  43       if (c2 < 0xa1)
  44         /* UHC part 2 */
  45         return uhc_2_mbtowc(conv,pwc,s,n);
  46       else if (c2 < 0xff) {
  47         /* Code set 1 (KS C 5601-1992) */
  48         unsigned char buf[2];
  49         buf[0] = c-0x80; buf[1] = c2-0x80;
  50         return ksc5601_mbtowc(conv,pwc,buf,2);
  51       }
  52     }
  53   }
  54   return RET_ILSEQ;
  55 }
  56
  57 static int
  58 cp949_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
  59 {
  60   unsigned char buf[2];
  61   int ret;
  62
  63   /* Code set 0 (ASCII) */
  64   ret = ascii_wctomb(conv,r,wc,n);
  65   if (ret != RET_ILUNI)
  66     return ret;
  67
  68   /* Code set 1 (KS C 5601-1992) */
  69   ret = ksc5601_wctomb(conv,buf,wc,2);
  70   if (ret != RET_ILUNI) {
  71     if (ret != 2) abort();
  72     if (n < 2)
  73       return RET_TOOSMALL;
  74     r[0] = buf[0]+0x80;
  75     r[1] = buf[1]+0x80;
  76     return 2;
  77   }
  78
  79   /* UHC */
  80   if (wc >= 0xac00 && wc < 0xd7a4) {
  81     if (wc < 0xc8a5)
  82       return uhc_1_wctomb(conv,r,wc,n);
  83     else
  84       return uhc_2_wctomb(conv,r,wc,n);
  85   }
  86
  87   return RET_ILUNI;
  88 }