/* Increase the size of a dynamic array and clear the new part.

   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; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <dynarray.h>

#include <stdlib.h>

#include <string.h>

bool

__libc_dynarray_resize_clear (struct dynarray_header *list, size_t size,

                              void *scratch, size_t element_size)

{

  size_t old_size = list->used;

  if (!__libc_dynarray_resize (list, size, scratch, element_size))

    return false;

  /* __libc_dynarray_resize already checked for overflow.  */

  memset (list->array + (old_size * element_size), 0,

          (size - old_size) * element_size);

  return true;

}

libc_hidden_def (__libc_dynarray_resize_clear)