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
28static int
29cp949_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
57static int
58cp949_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}
89