cs_strncmp.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.5 */
/* EMACS_MODES: !fill, lnumb, !overwrite, !nodelete, !picture */
#include "ctype.h"
/*
* Compare strings (at most n bytes) ignoring case
* returns: s1>s2; >0 s1==s2; 0 s1<s2; <0
*/
int
#if defined(__STDC__)
cs_strncmp(
char * s1,
char * s2,
int n
)
#else
cs_strncmp(s1, s2, n)
register char *s1, *s2;
register n;
#endif
{
if(s1 == s2)
return(0);
while(--n >= 0 && toupper(*s1) == toupper(*s2++))
if(*s1++ == '\0')
return(0);
return((n < 0)? 0: (toupper(*s1) - toupper(*--s2)));
}