/*
 * 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);
}