lib/euc_kr.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  * EUC-KR
  23  */
  24
  25 /* Specification: RFC 1557 */
  26
  27 static int
  28 euc_kr_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
  29 {
  30   unsigned char c = *s;
  31   /* Code set 0 (ASCII or KS C 5636-1993) */
  32   if (c < 0x80)
  33     return ascii_mbtowc(conv,pwc,s,n);
  34   /* Code set 1 (KS C 5601-1992) */
  35   if (c >= 0xa1 && c < 0xff) {
  36     if (n < 2)
  37       return RET_TOOFEW(0);
  38     {
  39       unsigned char c2 = s[1];
  40       if (c2 >= 0xa1 && c2 < 0xff) {
  41         unsigned char buf[2];
  42         buf[0] = c-0x80; buf[1] = c2-0x80;
  43         return ksc5601_mbtowc(conv,pwc,buf,2);
  44       } else
  45         return RET_ILSEQ;
  46     }
  47   }
  48   return RET_ILSEQ;
  49 }
  50
  51 static int
  52 euc_kr_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
  53 {
  54   unsigned char buf[2];
  55   int ret;
  56
  57   /* Code set 0 (ASCII or KS C 5636-1993) */
  58   ret = ascii_wctomb(conv,r,wc,n);
  59   if (ret != RET_ILUNI)
  60     return ret;
  61
  62   /* Code set 1 (KS C 5601-1992) */
  63   ret = ksc5601_wctomb(conv,buf,wc,2);
  64   if (ret != RET_ILUNI) {
  65     if (ret != 2) abort();
  66     if (n < 2)
  67       return RET_TOOSMALL;
  68     r[0] = buf[0]+0x80;
  69     r[1] = buf[1]+0x80;
  70     return 2;
  71   }
  72
  73   return RET_ILUNI;
  74 }