1/* Copyright (C) 1995-2018 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library 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
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <wchar.h>
20
21#ifdef WCSCSPN
22# define wcscspn WCSCSPN
23#endif
24
25/* Return the length of the maximum initial segment
26 of WCS which contains only wide-characters not in REJECT. */
27size_t
28wcscspn (const wchar_t *wcs, const wchar_t *reject)
29{
30 size_t count = 0;
31
32 while (*wcs != L'\0')
33 if (wcschr (reject, *wcs++) == NULL)
34 ++count;
35 else
36 return count;
37
38 return count;
39}
40