1/* 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  UNIT buf1[2048 / sizeof (UNIT)];
23  UNIT buf2[2048 / sizeof (UNIT)];
24  UNIT *norms1;
25  size_t norms1_length;
26  UNIT *norms2;
27  size_t norms2_length;
28  int cmp;
29
30  /* Normalize S1.  */
31  norms1_length = sizeof (buf1) / sizeof (UNIT);
32  norms1 = U_NORMALIZE (nf, s1, n1, buf1, &norms1_length);
33  if (norms1 == NULL)
34    /* errno is set here.  */
35    return -1;
36
37  /* Normalize S2.  */
38  norms2_length = sizeof (buf2) / sizeof (UNIT);
39  norms2 = U_NORMALIZE (nf, s2, n2, buf2, &norms2_length);
40  if (norms2 == NULL)
41    {
42      if (norms1 != buf1)
43        {
44          int saved_errno = errno;
45          free (norms1);
46          errno = saved_errno;
47        }
48      return -1;
49    }
50
51  /* Compare the normalized strings.  */
52  cmp = U_CMP2 (norms1, norms1_length, norms2, norms2_length);
53  if (cmp > 0)
54    cmp = 1;
55  else if (cmp < 0)
56    cmp = -1;
57
58  if (norms2 != buf2)
59    free (norms2);
60  if (norms1 != buf1)
61    free (norms1);
62  *resultp = cmp;
63  return 0;
64}
65