errno-h: document Haiku errors can’t be -1
[gnulib.git] / lib / wmemchr-impl.h
blob738c5781e12bf0c7fe2674d66135895c032d7c5f
1 /* Search wide character array for a wide character.
2 Copyright (C) 1999, 2011-2025 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 1999.
5 This file is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
10 This file 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
13 GNU 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 <https://www.gnu.org/licenses/>. */
18 wchar_t *
19 wmemchr (const wchar_t *s, wchar_t c, size_t n)
21 for (; n > 0; s++, n--)
23 if (*s == c)
24 return (wchar_t *) s;
26 return NULL;