1 /* Test whether a Unicode string is invariant under a given case mapping.
2 Copyright (C) 2009-2010 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2009.
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.
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.
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/>. */
19 FUNC (const UNIT *s, size_t n,
20 UNIT * (*mapping) (const UNIT *s, size_t n, const char *iso639_language,
22 UNIT *resultbuf, size_t *lengthp),
23 const char *iso639_language,
26 UNIT normsbuf[2048 / sizeof (UNIT)];
29 UNIT mappedbuf[2048 / sizeof (UNIT)];
33 /* Apply canonical decomposition to S. */
34 norms_length = sizeof (normsbuf) / sizeof (UNIT);
35 norms = U_NORMALIZE (UNINORM_NFD, s, n, normsbuf, &norms_length);
37 /* errno is set here. */
41 mapped_length = sizeof (mappedbuf) / sizeof (UNIT);
42 mapped = mapping (norms, norms_length, iso639_language, NULL,
43 mappedbuf, &mapped_length);
46 if (norms != normsbuf)
48 int saved_errno = errno;
56 *resultp = (mapped_length == norms_length
57 && U_CMP (mapped, norms, norms_length) == 0);
59 if (mapped != mappedbuf)
61 if (norms != normsbuf)