/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1988 AT&T	*/
/*	  All Rights Reserved  	*/

#include "lint.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>

/*
 * calloc - allocate and clear memory block
 */
void *
calloc(size_t num, size_t size)
{
	void *mp;
	size_t total;

	if (num == 0 || size == 0)
		total = 0;
	else {
		total = num * size;

		/* check for overflow */
		if (total / num != size) {
			errno = ENOMEM;
			return (0);
		}
	}
	return ((mp = malloc(total)) ? memset(mp, 0, total) : mp);
}