From be96c4f44553bea15e3e2870548ea292a569b160 Mon Sep 17 00:00:00 2001
From: "Ugen J.S. Antsilevich" <ugen@FreeBSD.org>
Date: Mon, 27 Feb 1995 09:16:04 +0000
Subject: [PATCH] Add strncmp() function..I need it and hope nobody will eat me
 alive for this..:)

---
 sys/libkern/Makefile  |  4 ++--
 sys/libkern/strncmp.c | 56 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+), 2 deletions(-)
 create mode 100644 sys/libkern/strncmp.c

diff --git a/sys/libkern/Makefile b/sys/libkern/Makefile
index 4e4c269905c2..1dc9785aae72 100644
--- a/sys/libkern/Makefile
+++ b/sys/libkern/Makefile
@@ -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)
diff --git a/sys/libkern/strncmp.c b/sys/libkern/strncmp.c
new file mode 100644
index 000000000000..805b5b029688
--- /dev/null
+++ b/sys/libkern/strncmp.c
@@ -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);
+}