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
35 static int
gb12345_mbtowc(conv_t conv,ucs4_t * pwc,const unsigned char * s,int n)36 gb12345_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
50 static int
gb12345_wctomb(conv_t conv,unsigned char * r,ucs4_t wc,int n)51 gb12345_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