1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <stdlib.h>
28 #include <string.h>
29 #include <errno.h>
30
31 /*
32 * calloc - allocate and clear memory block
33 */
34
35 void *
calloc(size_t num,size_t size)36 calloc(size_t num, size_t size)
37 {
38 void *mp;
39 size_t total;
40
41 if (num == 0 || size == 0) {
42 total = 0;
43 } else {
44 total = num * size;
45
46 /* check for overflow */
47 if ((total / num) != size) {
48 errno = ENOMEM;
49 return (NULL);
50 }
51 }
52
53 mp = malloc(total);
54 if (mp == NULL)
55 return (NULL);
56 (void) memset(mp, 0, total);
57 return (mp);
58 }
59
60 /*ARGSUSED*/
61 void
cfree(void * p,size_t num,size_t size)62 cfree(void *p, size_t num, size_t size)
63 {
64 free(p);
65 }
66