reallocarray.c revision 1.12
1/* $NetBSD: reallocarray.c,v 1.12 2022/10/28 09:43:59 wiz Exp $ */ 2/* $OpenBSD: reallocarray.c,v 1.1 2014/05/08 21:43:49 deraadt Exp $ */ 3 4/*- 5 * Copyright (c) 2015 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Christos Zoulas. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#ifdef HAVE_NBTOOL_CONFIG_H 34#include "nbtool_config.h" 35#endif /* HAVE_NBTOOL_CONFIG_H */ 36 37#include <sys/cdefs.h> 38__RCSID("$NetBSD: reallocarray.c,v 1.12 2022/10/28 09:43:59 wiz Exp $"); 39 40#include "namespace.h" 41 42#define _OPENBSD_SOURCE 43#include <errno.h> 44#include <stdlib.h> 45 46void * 47reallocarray(void *optr, size_t nmemb, size_t size) 48{ 49 int e; 50 51 if (nmemb == 0 || size == 0) 52 return realloc(optr, 0); 53 54 e = reallocarr(&optr, nmemb, size); 55 if (e == 0) 56 return optr; 57 if (e == EOVERFLOW) 58 errno = ENOMEM; 59 else 60 errno = e; 61 62 return NULL; 63} 64