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., 51 Franklin Street,
18 * Fifth Floor, Boston, MA 02110-1301, USA.
19 */
20
21/*
22 * GB/T 12345-1990
23 */
24
25/*
26 * GB/T 12345-1990 is a traditional chinese counterpart of GB 2312-1986.
27 * According to the unicode.org tables:
28 * 2146 characters have been changed to their traditional counterpart,
29 * 103 characters have been added, no characters have been removed.
30 * Therefore we use an auxiliary table, which contains only the changes.
31 */
32
33#include "gb12345ext.h"
34
35static int
36gb12345_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
37{
38  int ret;
39
40  /* The gb12345ext table overrides some entries in the gb2312 table. */
41  /* Try the GB12345 extensions -> Unicode table. */
42  ret = gb12345ext_mbtowc(conv,pwc,s,n);
43  if (ret != RET_ILSEQ)
44    return ret;
45  /* Try the GB2312 -> Unicode table. */
46  ret = gb2312_mbtowc(conv,pwc,s,n);
47  return ret;
48}
49
50static int
51gb12345_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
52{
53  int ret;
54
55  /* The gb12345ext table overrides some entries in the gb2312 table. */
56  /* Try the Unicode -> GB12345 extensions table. */
57  ret = gb12345ext_wctomb(conv,r,wc,n);
58  if (ret != RET_ILUNI)
59    return ret;
60  /* Try the Unicode -> GB2312 table, and check that the resulting GB2312
61     byte sequence is not overridden by the GB12345 extensions table. */
62  ret = gb2312_wctomb(conv,r,wc,n);
63  if (ret == 2 && gb12345ext_mbtowc(conv,&wc,r,2) == 2)
64    return RET_ILUNI;
65  else
66    return ret;
67}
68