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