17c478bdstevel@tonic-gate/*
27c478bdstevel@tonic-gate * CDDL HEADER START
37c478bdstevel@tonic-gate *
47c478bdstevel@tonic-gate * The contents of this file are subject to the terms of the
57257d1braf * Common Development and Distribution License (the "License").
67257d1braf * You may not use this file except in compliance with the License.
77c478bdstevel@tonic-gate *
87c478bdstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bdstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
107c478bdstevel@tonic-gate * See the License for the specific language governing permissions
117c478bdstevel@tonic-gate * and limitations under the License.
127c478bdstevel@tonic-gate *
137c478bdstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
147c478bdstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bdstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
167c478bdstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
177c478bdstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bdstevel@tonic-gate *
197c478bdstevel@tonic-gate * CDDL HEADER END
207c478bdstevel@tonic-gate */
217257d1braf
227c478bdstevel@tonic-gate/*
237257d1braf * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
247c478bdstevel@tonic-gate * Use is subject to license terms.
257c478bdstevel@tonic-gate */
267c478bdstevel@tonic-gate
277c478bdstevel@tonic-gate/*	Copyright (c) 1988 AT&T	*/
287c478bdstevel@tonic-gate/*	  All Rights Reserved  	*/
297c478bdstevel@tonic-gate
307257d1braf#pragma ident	"%Z%%M%	%I%	%E% SMI"
317c478bdstevel@tonic-gate
327c478bdstevel@tonic-gate#if !defined(_KMDB) && !defined(_BOOT) && !defined(_KERNEL)
337c478bdstevel@tonic-gate
347257d1braf#pragma weak _memcmp = memcmp
357c478bdstevel@tonic-gate
367257d1braf#include "lint.h"
377c478bdstevel@tonic-gate#endif /* !_KMDB && !_BOOT && !_KERNEL */
387c478bdstevel@tonic-gate
397c478bdstevel@tonic-gate#include <sys/types.h>
407c478bdstevel@tonic-gate#if defined(_KERNEL)
417c478bdstevel@tonic-gate#include <sys/systm.h>
427c478bdstevel@tonic-gate#else
437c478bdstevel@tonic-gate#include <string.h>
447c478bdstevel@tonic-gate#include <stddef.h>
457c478bdstevel@tonic-gate#endif
467c478bdstevel@tonic-gate
477c478bdstevel@tonic-gate/*
487c478bdstevel@tonic-gate * Compare n bytes:  s1>s2: >0  s1==s2: 0  s1<s2: <0
497c478bdstevel@tonic-gate */
507c478bdstevel@tonic-gateint
517c478bdstevel@tonic-gatememcmp(const void *s1, const void *s2, size_t n)
527c478bdstevel@tonic-gate{
537c478bdstevel@tonic-gate	if (s1 != s2 && n != 0) {
547c478bdstevel@tonic-gate		const unsigned char *ps1 = s1;
557c478bdstevel@tonic-gate		const unsigned char *ps2 = s2;
567c478bdstevel@tonic-gate
577c478bdstevel@tonic-gate		do {
587c478bdstevel@tonic-gate			if (*ps1++ != *ps2++)
597c478bdstevel@tonic-gate				return (ps1[-1] - ps2[-1]);
607c478bdstevel@tonic-gate		} while (--n != 0);
617c478bdstevel@tonic-gate	}
627c478bdstevel@tonic-gate
637c478bdstevel@tonic-gate	return (0);
647c478bdstevel@tonic-gate}
65