1/* Locale dependent, normalization insensitive comparison of Unicode strings.
2   Copyright (C) 2009-2010 Free Software Foundation, Inc.
3   Written by Bruno Haible <bruno@clisp.org>, 2009.
4
5   This program is free software: you can redistribute it and/or modify it
6   under the terms of the GNU Lesser General Public License as published
7   by the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18int
19FUNC (const UNIT *s1, size_t n1, const UNIT *s2, size_t n2,
20      uninorm_t nf, int *resultp)
21{
22  char buf1[2048];
23  char buf2[2048];
24  char *transformed1;
25  size_t transformed1_length;
26  char *transformed2;
27  size_t transformed2_length;
28  int cmp;
29
30  /* Normalize and transform S1.  */
31  transformed1_length = sizeof (buf1);
32  transformed1 = U_NORMXFRM (s1, n1, nf, buf1, &transformed1_length);
33  if (transformed1 == NULL)
34    /* errno is set here.  */
35    return -1;
36
37  /* Normalize and transform S2.  */
38  transformed2_length = sizeof (buf2);
39  transformed2 = U_NORMXFRM (s2, n2, nf, buf2, &transformed2_length);
40  if (transformed2 == NULL)
41    {
42      if (transformed1 != buf1)
43        {
44          int saved_errno = errno;
45          free (transformed1);
46          errno = saved_errno;
47        }
48      return -1;
49    }
50
51  /* Compare the transformed strings.  */
52  cmp = memcmp2 (transformed1, transformed1_length,
53                 transformed2, transformed2_length);
54  if (cmp < 0)
55    cmp = -1;
56  else if (cmp > 0)
57    cmp = 1;
58
59  if (transformed2 != buf2)
60    free (transformed2);
61  if (transformed1 != buf1)
62    free (transformed1);
63  *resultp = cmp;
64  return 0;
65}
66