1187498Simp#include "config.h"
2187498Simp
3187498Simp#if HAVE_STRCASESTR
4187498Simp
5187498Simpint dummy;
6187498Simp
7187498Simp#else
8187498Simp
9187498Simp/*	Id: compat_strcasestr.c,v 1.4 2014/12/11 09:19:32 schwarze Exp 	*/
10187498Simp/*	NetBSD: strcasestr.c,v 1.3 2005/11/29 03:12:00 christos Exp 	*/
11187498Simp
12187498Simp/*-
13187498Simp * Copyright (c) 1990, 1993
14187498Simp *	The Regents of the University of California.  All rights reserved.
15187498Simp *
16187498Simp * This code is derived from software contributed to Berkeley by
17187498Simp * Chris Torek.
18187498Simp *
19187498Simp * Redistribution and use in source and binary forms, with or without
20187498Simp * modification, are permitted provided that the following conditions
21187498Simp * are met:
22187498Simp * 1. Redistributions of source code must retain the above copyright
23187498Simp *    notice, this list of conditions and the following disclaimer.
24187498Simp * 2. Redistributions in binary form must reproduce the above copyright
25187498Simp *    notice, this list of conditions and the following disclaimer in the
26187498Simp *    documentation and/or other materials provided with the distribution.
27187498Simp * 3. Neither the name of the University nor the names of its contributors
28187498Simp *    may be used to endorse or promote products derived from this software
29187498Simp *    without specific prior written permission.
30187498Simp *
31187498Simp * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
32187498Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33187498Simp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34187498Simp * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
35187498Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36187498Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37187498Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38187498Simp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39187498Simp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40187498Simp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41187498Simp * SUCH DAMAGE.
42187498Simp */
43187498Simp
44187498Simp#include <sys/types.h>
45187498Simp#include <ctype.h>
46187498Simp#include <string.h>
47187498Simp
48187498Simp#define	__UNCONST(a)	((void *)(unsigned long)(const void *)(a))
49187498Simp
50187498Simp/*
51187498Simp * Find the first occurrence of find in s, ignore case.
52187498Simp */
53187498Simpchar *
54187498Simpstrcasestr(const char *s, const char *find)
55187498Simp{
56187498Simp	char c, sc;
57187498Simp	size_t len;
58187498Simp
59187498Simp	if ((c = *find++) != 0) {
60187498Simp		c = tolower((unsigned char)c);
61187498Simp		len = strlen(find);
62187498Simp		do {
63187498Simp			do {
64187498Simp				if ((sc = *s++) == 0)
65187498Simp					return (NULL);
66187498Simp			} while ((char)tolower((unsigned char)sc) != c);
67187498Simp		} while (strncasecmp(s, find, len) != 0);
68187498Simp		s--;
69187498Simp	}
70187498Simp	return __UNCONST(s);
71187498Simp}
72187498Simp
73187498Simp#endif
74187498Simp