// Copyright 2016 The Fuchsia Authors
// Copyright (c) 2008 Travis Geiselbrecht
//
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file or at
// https://opensource.org/licenses/MIT

#include <string.h>
#include <sys/types.h>

size_t
strspn(char const *s, char const *accept)
{
    const char *p;
    const char *a;
    size_t count = 0;

    for (p = s; *p != '\0'; ++p) {
        for (a = accept; *a != '\0'; ++a) {
            if (*p == *a)
                break;
        }
        if (*a == '\0')
            return count;
        ++count;
    }

    return count;
}