1/* Copyright (C) 1995-2021 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 <https://www.gnu.org/licenses/>. */
18
19#include <wchar.h>
20
21#ifdef WCSSPN
22# define wcsspn WCSSPN
23#endif
24
25/* Return the length of the maximum initial segment
26 of WCS which contains only wide-characters in ACCEPT. */
27size_t
28wcsspn (const wchar_t *wcs, const wchar_t *accept)
29{
30 const wchar_t *p;
31 const wchar_t *a;
32 size_t count = 0;
33
34 for (p = wcs; *p != L'\0'; ++p)
35 {
36 for (a = accept; *a != L'\0'; ++a)
37 if (*p == *a)
38 break;
39 if (*a == L'\0')
40 return count;
41 else
42 ++count;
43 }
44
45 return count;
46}
47libc_hidden_def (wcsspn)
48