xref: /onnv-gate/usr/src/cmd/lp/lib/lp/cs_strncmp.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23*0Sstevel@tonic-gate /*	  All Rights Reserved  	*/
24*0Sstevel@tonic-gate 
25*0Sstevel@tonic-gate 
26*0Sstevel@tonic-gate #ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.5	*/
27*0Sstevel@tonic-gate /* EMACS_MODES: !fill, lnumb, !overwrite, !nodelete, !picture */
28*0Sstevel@tonic-gate 
29*0Sstevel@tonic-gate #include "ctype.h"
30*0Sstevel@tonic-gate 
31*0Sstevel@tonic-gate /*
32*0Sstevel@tonic-gate  * Compare strings (at most n bytes) ignoring case
33*0Sstevel@tonic-gate  *	returns: s1>s2; >0  s1==s2; 0  s1<s2; <0
34*0Sstevel@tonic-gate  */
35*0Sstevel@tonic-gate 
36*0Sstevel@tonic-gate int
37*0Sstevel@tonic-gate #if	defined(__STDC__)
cs_strncmp(char * s1,char * s2,int n)38*0Sstevel@tonic-gate cs_strncmp(
39*0Sstevel@tonic-gate 	char *			s1,
40*0Sstevel@tonic-gate 	char *			s2,
41*0Sstevel@tonic-gate 	int			n
42*0Sstevel@tonic-gate )
43*0Sstevel@tonic-gate #else
44*0Sstevel@tonic-gate cs_strncmp(s1, s2, n)
45*0Sstevel@tonic-gate register char *s1, *s2;
46*0Sstevel@tonic-gate register n;
47*0Sstevel@tonic-gate #endif
48*0Sstevel@tonic-gate {
49*0Sstevel@tonic-gate 	if(s1 == s2)
50*0Sstevel@tonic-gate 		return(0);
51*0Sstevel@tonic-gate 	while(--n >= 0 && toupper(*s1) == toupper(*s2++))
52*0Sstevel@tonic-gate 		if(*s1++ == '\0')
53*0Sstevel@tonic-gate 			return(0);
54*0Sstevel@tonic-gate 	return((n < 0)? 0: (toupper(*s1) - toupper(*--s2)));
55*0Sstevel@tonic-gate }
56