1 /* Search character in UTF-32 string.
2 Copyright (C) 1999, 2002, 2006, 2009-2014 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2002.
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
18 #include <config.h>
19
20 /* Specification. */
21 #include "unistr.h"
22
23 uint32_t *
u32_strrchr(const uint32_t * s,ucs4_t uc)24 u32_strrchr (const uint32_t *s, ucs4_t uc)
25 {
26 /* Calling u32_strlen and then searching from the other end would cause more
27 memory accesses. Avoid that, at the cost of a few more comparisons. */
28 uint32_t *result = NULL;
29
30 for (;; s++)
31 {
32 if (*s == uc)
33 result = (uint32_t *) s;
34 if (*s == 0)
35 break;
36 }
37 return result;
38 }
39