xref: /onnv-gate/usr/src/lib/libc/port/gen/calloc.c (revision 6812:febeba71273d)
10Sstevel@tonic-gate /*
20Sstevel@tonic-gate  * CDDL HEADER START
30Sstevel@tonic-gate  *
40Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*6812Sraf  * Common Development and Distribution License (the "License").
6*6812Sraf  * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate  *
80Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate  * See the License for the specific language governing permissions
110Sstevel@tonic-gate  * and limitations under the License.
120Sstevel@tonic-gate  *
130Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate  *
190Sstevel@tonic-gate  * CDDL HEADER END
200Sstevel@tonic-gate  */
21*6812Sraf 
220Sstevel@tonic-gate /*
23*6812Sraf  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
240Sstevel@tonic-gate  * Use is subject to license terms.
250Sstevel@tonic-gate  */
260Sstevel@tonic-gate 
270Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
280Sstevel@tonic-gate /*	  All Rights Reserved  	*/
290Sstevel@tonic-gate 
30*6812Sraf #pragma ident	"%Z%%M%	%I%	%E% SMI"
310Sstevel@tonic-gate 
32*6812Sraf #include "lint.h"
330Sstevel@tonic-gate #include <stdlib.h>
340Sstevel@tonic-gate #include <string.h>
350Sstevel@tonic-gate #include <errno.h>
360Sstevel@tonic-gate 
370Sstevel@tonic-gate /*
380Sstevel@tonic-gate  * calloc - allocate and clear memory block
390Sstevel@tonic-gate  */
400Sstevel@tonic-gate void *
calloc(size_t num,size_t size)410Sstevel@tonic-gate calloc(size_t num, size_t size)
420Sstevel@tonic-gate {
430Sstevel@tonic-gate 	void *mp;
440Sstevel@tonic-gate 	size_t total;
450Sstevel@tonic-gate 
460Sstevel@tonic-gate 	if (num == 0 || size == 0)
470Sstevel@tonic-gate 		total = 0;
480Sstevel@tonic-gate 	else {
490Sstevel@tonic-gate 		total = num * size;
500Sstevel@tonic-gate 
510Sstevel@tonic-gate 		/* check for overflow */
520Sstevel@tonic-gate 		if (total / num != size) {
53*6812Sraf 			errno = ENOMEM;
54*6812Sraf 			return (0);
550Sstevel@tonic-gate 		}
560Sstevel@tonic-gate 	}
570Sstevel@tonic-gate 	return ((mp = malloc(total)) ? memset(mp, 0, total) : mp);
580Sstevel@tonic-gate }
59