xref: /titanic_52/usr/src/boot/lib/libstand/strcasecmp.c (revision 4a5d661a82b942b6538acd26209d959ce98b593a)
1*4a5d661aSToomas Soome /*
2*4a5d661aSToomas Soome  * Copyright (c) 1987, 1993
3*4a5d661aSToomas Soome  *	The Regents of the University of California.  All rights reserved.
4*4a5d661aSToomas Soome  *
5*4a5d661aSToomas Soome  * Redistribution and use in source and binary forms, with or without
6*4a5d661aSToomas Soome  * modification, are permitted provided that the following conditions
7*4a5d661aSToomas Soome  * are met:
8*4a5d661aSToomas Soome  * 1. Redistributions of source code must retain the above copyright
9*4a5d661aSToomas Soome  *    notice, this list of conditions and the following disclaimer.
10*4a5d661aSToomas Soome  * 2. Redistributions in binary form must reproduce the above copyright
11*4a5d661aSToomas Soome  *    notice, this list of conditions and the following disclaimer in the
12*4a5d661aSToomas Soome  *    documentation and/or other materials provided with the distribution.
13*4a5d661aSToomas Soome  * 4. Neither the name of the University nor the names of its contributors
14*4a5d661aSToomas Soome  *    may be used to endorse or promote products derived from this software
15*4a5d661aSToomas Soome  *    without specific prior written permission.
16*4a5d661aSToomas Soome  *
17*4a5d661aSToomas Soome  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18*4a5d661aSToomas Soome  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19*4a5d661aSToomas Soome  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20*4a5d661aSToomas Soome  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21*4a5d661aSToomas Soome  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22*4a5d661aSToomas Soome  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23*4a5d661aSToomas Soome  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24*4a5d661aSToomas Soome  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25*4a5d661aSToomas Soome  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26*4a5d661aSToomas Soome  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27*4a5d661aSToomas Soome  * SUCH DAMAGE.
28*4a5d661aSToomas Soome  */
29*4a5d661aSToomas Soome 
30*4a5d661aSToomas Soome #include <sys/cdefs.h>
31*4a5d661aSToomas Soome __FBSDID("$FreeBSD$");
32*4a5d661aSToomas Soome 
33*4a5d661aSToomas Soome #include <sys/cdefs.h>
34*4a5d661aSToomas Soome #include <string.h>
35*4a5d661aSToomas Soome #include "stand.h"
36*4a5d661aSToomas Soome 
37*4a5d661aSToomas Soome #if defined(LIBC_SCCS) && !defined(lint)
38*4a5d661aSToomas Soome static char sccsid[] = "@(#)strcasecmp.c	8.1 (Berkeley) 6/4/93";
39*4a5d661aSToomas Soome #endif /* LIBC_SCCS and not lint */
40*4a5d661aSToomas Soome 
41*4a5d661aSToomas Soome int
42*4a5d661aSToomas Soome strcasecmp(s1, s2)
43*4a5d661aSToomas Soome 	const char *s1, *s2;
44*4a5d661aSToomas Soome {
45*4a5d661aSToomas Soome 	const u_char
46*4a5d661aSToomas Soome 			*us1 = (const u_char *)s1,
47*4a5d661aSToomas Soome 			*us2 = (const u_char *)s2;
48*4a5d661aSToomas Soome 
49*4a5d661aSToomas Soome 	while (tolower(*us1) == tolower(*us2++))
50*4a5d661aSToomas Soome 		if (*us1++ == '\0')
51*4a5d661aSToomas Soome 			return (0);
52*4a5d661aSToomas Soome 	return (tolower(*us1) - tolower(*--us2));
53*4a5d661aSToomas Soome }
54*4a5d661aSToomas Soome 
55*4a5d661aSToomas Soome int
56*4a5d661aSToomas Soome strncasecmp(s1, s2, n)
57*4a5d661aSToomas Soome 	const char *s1, *s2;
58*4a5d661aSToomas Soome 	size_t n;
59*4a5d661aSToomas Soome {
60*4a5d661aSToomas Soome 	if (n != 0) {
61*4a5d661aSToomas Soome 		const u_char
62*4a5d661aSToomas Soome 				*us1 = (const u_char *)s1,
63*4a5d661aSToomas Soome 				*us2 = (const u_char *)s2;
64*4a5d661aSToomas Soome 
65*4a5d661aSToomas Soome 		do {
66*4a5d661aSToomas Soome 			if (tolower(*us1) != tolower(*us2++))
67*4a5d661aSToomas Soome 				return (tolower(*us1) - tolower(*--us2));
68*4a5d661aSToomas Soome 			if (*us1++ == '\0')
69*4a5d661aSToomas Soome 				break;
70*4a5d661aSToomas Soome 		} while (--n != 0);
71*4a5d661aSToomas Soome 	}
72*4a5d661aSToomas Soome 	return (0);
73*4a5d661aSToomas Soome }
74