/*      $NetBSD: reallocarray.c,v 1.12 2022/10/28 09:43:59 wiz Exp $    */
/*      $OpenBSD: reallocarray.c,v 1.1 2014/05/08 21:43:49 deraadt Exp $        */

/*-
* Copyright (c) 2015 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#ifdef HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif /* HAVE_NBTOOL_CONFIG_H */

#include <sys/cdefs.h>
__RCSID("$NetBSD: reallocarray.c,v 1.12 2022/10/28 09:43:59 wiz Exp $");

#include "namespace.h"

#define _OPENBSD_SOURCE
#include <errno.h>
#include <stdlib.h>

void *
reallocarray(void *optr, size_t nmemb, size_t size)
{
       int e;

       if (nmemb == 0 || size == 0)
               return realloc(optr, 0);

       e = reallocarr(&optr, nmemb, size);
       if (e == 0)
               return optr;
       if (e == EOVERFLOW)
               errno = ENOMEM;
       else
               errno = e;

       return NULL;
}