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      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 
     46 void *
     47 reallocarray(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