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 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #include "lint.h" 31 #include <stdlib.h> 32 #include <string.h> 33 #include <errno.h> 34 35 /* 36 * calloc - allocate and clear memory block 37 */ 38 void * 39 calloc(size_t num, size_t size) 40 { 41 void *mp; 42 size_t total; 43 44 if (num == 0 || size == 0) 45 total = 0; 46 else { 47 total = num * size; 48 49 /* check for overflow */ 50 if (total / num != size) { 51 errno = ENOMEM; 52 return (0); 53 } 54 } 55 return ((mp = malloc(total)) ? memset(mp, 0, total) : mp); 56 } 57