/* Change the size of an allocated block.

   Copyright (C) 2017-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public License as

   published by the Free Software Foundation; either version 2.1 of the

   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; see the file COPYING.LIB.  If

   not, see <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <malloc.h>

#include <malloc/malloc-internal.h>

void *

__libc_reallocarray (void *optr, size_t nmemb, size_t elem_size)

{

  size_t bytes;

  if (check_mul_overflow_size_t (nmemb, elem_size, &bytes))

    {

      __set_errno (ENOMEM);

      return 0;

    }

  else

    return realloc (optr, bytes);

}

libc_hidden_def (__libc_reallocarray)

weak_alias (__libc_reallocarray, reallocarray)