1/* 2 * $Id: strstr.c,v 1.4 2003-02-17 01:51:08 srittau Exp $ 3 * 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Chris Torek. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39#ifdef HAVE_CONFIG_H 40#include "config.h" 41#endif /* HAVE_CONFIG_H */ 42 43#if defined(LIBC_SCCS) && !defined(lint) 44static char sccsid[] = "@(#)strstr.c 5.2 (Berkeley) 1/26/91"; 45#endif /* LIBC_SCCS and not lint */ 46 47# if defined(ibm032) || (defined(sun) && defined(i386)) 48#ifdef sun 49#define const 50#endif /* sun */ 51 52#include <sys/types.h> 53#include <string.h> 54 55/* 56 * Find the first occurrence of find in s. 57 */ 58char * 59strstr(s, find) 60 register const char *s, *find; 61{ 62 register char c, sc; 63 register size_t len; 64 65 if ((c = *find++) != 0) { 66 len = strlen(find); 67 do { 68 do { 69 if ((sc = *s++) == 0) 70 return (0); 71 } while (sc != c); 72 } while (strncmp(s, find, len) != 0); 73 s--; 74 } 75 return ((char *)s); 76} 77# endif /* ibm03 sun i386 */ 78