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 * UTF-32LE
23 */
24
25/* Specification: Unicode 3.1 Standard Annex #19 */
26
27static int
28utf32le_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
29{
30  if (n >= 4) {
31    ucs4_t wc = s[0] + (s[1] << 8) + (s[2] << 16) + (s[3] << 24);
32    if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) {
33      *pwc = wc;
34      return 4;
35    } else
36      return RET_ILSEQ;
37  }
38  return RET_TOOFEW(0);
39}
40
41static int
42utf32le_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
43{
44  if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) {
45    if (n >= 4) {
46      r[0] = (unsigned char) wc;
47      r[1] = (unsigned char) (wc >> 8);
48      r[2] = (unsigned char) (wc >> 16);
49      r[3] = 0;
50      return 4;
51    } else
52      return RET_TOOSMALL;
53  }
54  return RET_ILUNI;
55}
56