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 * 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 62 cfree(void *p, size_t num, size_t size) 63 { 64 free(p); 65 } 66