lib/euc_kr.h

   1 /*
   2  * Copyright (C) 1999-2001, 2007, 2016 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  * EUC-KR
  22  */
  23
  24 /* Specification: RFC 1557 */
  25
  26 static int
  27 euc_kr_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
  28 {
  29   unsigned char c = *s;
  30   /* Code set 0 (ASCII or KS C 5636-1993) */
  31   if (c < 0x80)
  32     return ascii_mbtowc(conv,pwc,s,n);
  33   /* Code set 1 (KS C 5601-1992, now KS X 1001:2002) */
  34   if (c >= 0xa1 && c < 0xff) {
  35     if (n < 2)
  36       return RET_TOOFEW(0);
  37     {
  38       unsigned char c2 = s[1];
  39       if (c2 >= 0xa1 && c2 < 0xff) {
  40         unsigned char buf[2];
  41         buf[0] = c-0x80; buf[1] = c2-0x80;
  42         return ksc5601_mbtowc(conv,pwc,buf,2);
  43       } else
  44         return RET_ILSEQ;
  45     }
  46   }
  47   return RET_ILSEQ;
  48 }
  49
  50 static int
  51 euc_kr_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
  52 {
  53   unsigned char buf[2];
  54   int ret;
  55
  56   /* Code set 0 (ASCII or KS C 5636-1993) */
  57   ret = ascii_wctomb(conv,r,wc,n);
  58   if (ret != RET_ILUNI)
  59     return ret;
  60
  61   /* Code set 1 (KS C 5601-1992, now KS X 1001:2002) */
  62   ret = ksc5601_wctomb(conv,buf,wc,2);
  63   if (ret != RET_ILUNI) {
  64     if (ret != 2) abort();
  65     if (n < 2)
  66       return RET_TOOSMALL;
  67     r[0] = buf[0]+0x80;
  68     r[1] = buf[1]+0x80;
  69     return 2;
  70   }
  71
  72   return RET_ILUNI;
  73 }