1 | /* Copyright (C) 1995-2024 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <wchar.h> |
19 | #include <loop_unroll.h> |
20 | |
21 | #ifndef WCSCHR |
22 | # define WCSCHR __wcschr |
23 | #endif |
24 | |
25 | /* Find the first occurrence of WC in WCS. */ |
26 | wchar_t * |
27 | WCSCHR (const wchar_t *wcs, const wchar_t wc) |
28 | { |
29 | wchar_t *dest = NULL; |
30 | |
31 | #define ITERATION(index) \ |
32 | ({ \ |
33 | if (*wcs == wc) \ |
34 | dest = (wchar_t*) wcs; \ |
35 | dest == NULL && *wcs++ != L'\0'; \ |
36 | }) |
37 | |
38 | #ifndef UNROLL_NTIMES |
39 | # define UNROLL_NTIMES 1 |
40 | #endif |
41 | |
42 | while (1) |
43 | UNROLL_REPEAT (UNROLL_NTIMES, ITERATION); |
44 | |
45 | return dest; |
46 | } |
47 | libc_hidden_def (__wcschr) |
48 | weak_alias (__wcschr, wcschr) |
49 | libc_hidden_weak (wcschr) |
50 | |