1 /* Copyright (C) 1991, 1997, 2003 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 <http://www.gnu.org/licenses/>. */
17
18 #include <string.h>
19
20 /* Return the length of the maximum initial segment
21 of S which contains only characters in ACCEPT. */
strspn(const char * s,const char * accept)22 size_t strspn (const char *s, const char *accept)
23 {
24 const char *p;
25 const char *a;
26 size_t count = 0;
27
28 for (p = s; *p != '\0'; ++p)
29 {
30 for (a = accept; *a != '\0'; ++a)
31 if (*p == *a)
32 break;
33 if (*a == '\0')
34 return count;
35 else
36 ++count;
37 }
38
39 return count;
40 }
41 libc_hidden_def(strspn)
42