strcasecmp.c revision 92913 
1/*
2 * Copyright (c) 1987, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: head/lib/libstand/strcasecmp.c 92913 2002-03-21 23:39:28Z obrien $");
36
37#include <sys/cdefs.h>
38#include <string.h>
39#include "stand.h"
40
41#if defined(LIBC_SCCS) && !defined(lint)
42static char sccsid[] = "@(#)strcasecmp.c	8.1 (Berkeley) 6/4/93";
43#endif /* LIBC_SCCS and not lint */
44
45int
46strcasecmp(s1, s2)
47	const char *s1, *s2;
48{
49	const u_char
50			*us1 = (const u_char *)s1,
51			*us2 = (const u_char *)s2;
52
53	while (tolower(*us1) == tolower(*us2++))
54		if (*us1++ == '\0')
55			return (0);
56	return (tolower(*us1) - tolower(*--us2));
57}
58
59int
60strncasecmp(s1, s2, n)
61	const char *s1, *s2;
62	size_t n;
63{
64	if (n != 0) {
65		const u_char
66				*us1 = (const u_char *)s1,
67				*us2 = (const u_char *)s2;
68
69		do {
70			if (tolower(*us1) != tolower(*us2++))
71				return (tolower(*us1) - tolower(*--us2));
72			if (*us1++ == '\0')
73				break;
74		} while (--n != 0);
75	}
76	return (0);
77}
78