1 /*
2 ** Copyright 2001, Travis Geiselbrecht. All rights reserved.
3 ** Distributed under the terms of the NewOS License.
4 */
5 /*
6  * Copyright (c) 2008 Travis Geiselbrecht
7  *
8  * Use of this source code is governed by a MIT-style
9  * license that can be found in the LICENSE file or at
10  * https://opensource.org/licenses/MIT
11  */
12 #include <string.h>
13 #include <sys/types.h>
14 
15 size_t
strspn(char const * s,char const * accept)16 strspn(char const *s, char const *accept) {
17     const char *p;
18     const char *a;
19     size_t count = 0;
20 
21     for (p = s; *p != '\0'; ++p) {
22         for (a = accept; *a != '\0'; ++a) {
23             if (*p == *a)
24                 break;
25         }
26         if (*a == '\0')
27             return count;
28         ++count;
29     }
30 
31     return count;
32 }
33