1// Copyright 2016 The Fuchsia Authors
2// Copyright (c) 2008 Travis Geiselbrecht
3//
4// Use of this source code is governed by a MIT-style
5// license that can be found in the LICENSE file or at
6// https://opensource.org/licenses/MIT
7
8#include <string.h>
9#include <sys/types.h>
10
11size_t
12strspn(char const *s, char const *accept)
13{
14    const char *p;
15    const char *a;
16    size_t count = 0;
17
18    for (p = s; *p != '\0'; ++p) {
19        for (a = accept; *a != '\0'; ++a) {
20            if (*p == *a)
21                break;
22        }
23        if (*a == '\0')
24            return count;
25        ++count;
26    }
27
28    return count;
29}
30