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 11char * 12strstr(char const *s1, char const *s2) 13{ 14 int l1, l2; 15 16 l2 = strlen(s2); 17 if (!l2) 18 return (char *)s1; 19 l1 = strlen(s1); 20 while (l1 >= l2) { 21 l1--; 22 if (!memcmp(s1,s2,l2)) 23 return (char *)s1; 24 s1++; 25 } 26 return NULL; 27} 28