1313012Sdes/*	$OpenBSD: strcasestr.c,v 1.4 2015/08/31 02:53:57 guenther Exp $	*/
2313012Sdes/*	$NetBSD: strcasestr.c,v 1.2 2005/02/09 21:35:47 kleink Exp $	*/
3313012Sdes
4313012Sdes/*-
5313012Sdes * Copyright (c) 1990, 1993
6313012Sdes *	The Regents of the University of California.  All rights reserved.
7313012Sdes *
8313012Sdes * This code is derived from software contributed to Berkeley by
9313012Sdes * Chris Torek.
10313012Sdes *
11313012Sdes * Redistribution and use in source and binary forms, with or without
12313012Sdes * modification, are permitted provided that the following conditions
13313012Sdes * are met:
14313012Sdes * 1. Redistributions of source code must retain the above copyright
15313012Sdes *    notice, this list of conditions and the following disclaimer.
16313012Sdes * 2. Redistributions in binary form must reproduce the above copyright
17313012Sdes *    notice, this list of conditions and the following disclaimer in the
18313012Sdes *    documentation and/or other materials provided with the distribution.
19313012Sdes * 3. Neither the name of the University nor the names of its contributors
20313012Sdes *    may be used to endorse or promote products derived from this software
21313012Sdes *    without specific prior written permission.
22313012Sdes *
23313012Sdes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24313012Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25313012Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26313012Sdes * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27313012Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28313012Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29313012Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30313012Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31313012Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32313012Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33313012Sdes * SUCH DAMAGE.
34313012Sdes */
35313012Sdes
36313012Sdes/* OPENBSD ORIGINAL: lib/libc/string/strcasestr.c */
37313012Sdes
38313012Sdes#include "includes.h"
39313012Sdes
40313012Sdes#ifndef HAVE_STRCASESTR
41313012Sdes
42313012Sdes#include <ctype.h>
43313012Sdes#include <string.h>
44313012Sdes
45313012Sdes/*
46313012Sdes * Find the first occurrence of find in s, ignore case.
47313012Sdes */
48313012Sdeschar *
49313012Sdesstrcasestr(const char *s, const char *find)
50313012Sdes{
51313012Sdes	char c, sc;
52313012Sdes	size_t len;
53313012Sdes
54313012Sdes	if ((c = *find++) != 0) {
55313012Sdes		c = (char)tolower((unsigned char)c);
56313012Sdes		len = strlen(find);
57313012Sdes		do {
58313012Sdes			do {
59313012Sdes				if ((sc = *s++) == 0)
60313012Sdes					return (NULL);
61313012Sdes			} while ((char)tolower((unsigned char)sc) != c);
62313012Sdes		} while (strncasecmp(s, find, len) != 0);
63313012Sdes		s--;
64313012Sdes	}
65313012Sdes	return ((char *)s);
66313012Sdes}
67313012SdesDEF_WEAK(strcasestr);
68313012Sdes
69313012Sdes#endif
70