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Add strncmp() function..I need it and

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hope nobody will eat me alive for this..:)
This commit is contained in:
Ugen J.S. Antsilevich 1995-02-27 09:16:04 +00:00
parent 841d930e9d
commit be96c4f445
2 changed files with 58 additions and 2 deletions
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4
sys/libkern/Makefile
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@ -1,5 +1,5 @@
# @(#)Makefile 7.9 (Berkeley) 6/1/93
# $Id: Makefile,v 1.5 1994/10/26 11:14:21 jkh Exp $
# $Id: Makefile,v 1.6 1995/01/10 01:57:56 bde Exp $
.undef NOPROFILE
@ -8,7 +8,7 @@ CFLAGS+= -I${.CURDIR} -I${.CURDIR}/.. -DKERNEL
SRCS= adddi3.c anddi3.c ashldi3.c ashrdi3.c bcmp.c cmpdi2.c divdi3.c \
ffs.c iordi3.c locc.c lshldi3.c lshrdi3.c mcount.c moddi3.c \
muldi3.c negdi2.c notdi2.c qdivrem.c random.c rindex.c scanc.c \
skpc.c strcat.c strcmp.c strcpy.c strlen.c strncpy.c \
skpc.c strcat.c strcmp.c strcpy.c strlen.c strncmp.c strncpy.c \
subdi3.c ucmpdi2.c udivdi3.c umoddi3.c xordi3.c
.if exists(${.CURDIR}/${MACHINE}/Makefile.inc)

56
sys/libkern/strncmp.c Normal file
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@ -0,0 +1,56 @@
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)strncmp.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
#include <string.h>
int
strncmp(s1, s2, n)
register const char *s1, *s2;
register size_t n;
{
if (n == 0)
return (0);
do {
if (*s1 != *s2++)
return (*(unsigned char *)s1 - *(unsigned char *)--s2);
if (*s1++ == 0)
break;
} while (--n != 0);
return (0);
}