1161243Spjd/*- 2161243Spjd * Copyright (c) 1990, 1993 3161243Spjd * The Regents of the University of California. All rights reserved. 4161243Spjd * 5161243Spjd * This code is derived from software contributed to Berkeley by 6161243Spjd * Chris Torek. 7161243Spjd * 8161243Spjd * Redistribution and use in source and binary forms, with or without 9161243Spjd * modification, are permitted provided that the following conditions 10161243Spjd * are met: 11161243Spjd * 1. Redistributions of source code must retain the above copyright 12161243Spjd * notice, this list of conditions and the following disclaimer. 13161243Spjd * 2. Redistributions in binary form must reproduce the above copyright 14161243Spjd * notice, this list of conditions and the following disclaimer in the 15161243Spjd * documentation and/or other materials provided with the distribution. 16161243Spjd * 3. All advertising materials mentioning features or use of this software 17161243Spjd * must display the following acknowledgement: 18161243Spjd * This product includes software developed by the University of 19161243Spjd * California, Berkeley and its contributors. 20161243Spjd * 4. Neither the name of the University nor the names of its contributors 21161243Spjd * may be used to endorse or promote products derived from this software 22161243Spjd * without specific prior written permission. 23161243Spjd * 24161243Spjd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25161243Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26161243Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27161243Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28161243Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29161243Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30161243Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31161243Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32161243Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33161243Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34161243Spjd * SUCH DAMAGE. 35161243Spjd */ 36161243Spjd 37161243Spjd#include <sys/cdefs.h> 38161243Spjd__FBSDID("$FreeBSD$"); 39161243Spjd 40161243Spjd#include <sys/param.h> 41161243Spjd#include <sys/libkern.h> 42161243Spjd 43161243Spjd/* 44161243Spjd * Find the first occurrence of find in s. 45161243Spjd */ 46161243Spjdchar * 47161243Spjdstrstr(const char *s, const char *find) 48161243Spjd{ 49161243Spjd char c, sc; 50161243Spjd size_t len; 51161243Spjd 52161243Spjd if ((c = *find++) != 0) { 53161243Spjd len = strlen(find); 54161243Spjd do { 55161243Spjd do { 56161243Spjd if ((sc = *s++) == 0) 57161243Spjd return (NULL); 58161243Spjd } while (sc != c); 59161243Spjd } while (strncmp(s, find, len) != 0); 60161243Spjd s--; 61161243Spjd } 62161243Spjd return (__DECONST(char *, s)); 63161243Spjd} 64