1/*
2 * Copyright (C) 1999-2001, 2005 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 * GBK
23 */
24
25static int
26ces_gbk_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
27{
28  unsigned char c = *s;
29
30  /* Code set 0 (ASCII or GB 1988-89) */
31  if (c < 0x80)
32    return ascii_mbtowc(conv,pwc,s,n);
33  /* Code set 1 (GBK) */
34  if (c >= 0x81 && c < 0xff) {
35    if (n < 2)
36      return RET_TOOFEW(0);
37    return gbk_mbtowc(conv,pwc,s,2);
38  }
39  return RET_ILSEQ;
40}
41
42static int
43ces_gbk_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
44{
45  unsigned char buf[2];
46  int ret;
47
48  /* Code set 0 (ASCII or GB 1988-89) */
49  ret = ascii_wctomb(conv,r,wc,n);
50  if (ret != RET_ILUNI)
51    return ret;
52
53  /* Code set 1 (GBK) */
54  ret = gbk_wctomb(conv,buf,wc,2);
55  if (ret != RET_ILUNI) {
56    if (ret != 2) abort();
57    if (n < 2)
58      return RET_TOOSMALL;
59    r[0] = buf[0];
60    r[1] = buf[1];
61    return 2;
62  }
63
64  return RET_ILUNI;
65}
66