write_dataarray6_rank3_I8P Function

  function write_dataarray6_rank3_I8P(self, data_name, u, v, w, x, y, z, is_tuples) result(error)
  !< Write `<DataArray... NumberOfComponents="3"...>...</DataArray>` tag (I8P).
  class(xml_writer_appended), intent(inout)        :: self         !< Writer.
  character(*),               intent(in)           :: data_name    !< Data name.
  integer(I8P),               intent(in)           :: u(1:,1:,1:)  !< U component of data variable.
  integer(I8P),               intent(in)           :: v(1:,1:,1:)  !< V component of data variable.
  integer(I8P),               intent(in)           :: w(1:,1:,1:)  !< W component of data variable.
  integer(I8P),               intent(in)           :: x(1:,1:,1:)  !< X component of data variable.
  integer(I8P),               intent(in)           :: y(1:,1:,1:)  !< Y component of data variable.
  integer(I8P),               intent(in)           :: z(1:,1:,1:)  !< Z component of data variable.
  logical,                    intent(in), optional :: is_tuples    !< Use "NumberOfTuples".
  integer(I4P)                                     :: error        !< Error status.
  character(len=:), allocatable                    :: data_type    !< Data type.
  integer(I4P)                                     :: n_components !< Number of components.

  data_type = 'Int64'
  n_components = 6
  call self%write_dataarray_tag_appended(data_type=data_type, number_of_components=n_components, data_name=data_name, &
                                         is_tuples=is_tuples)
  call self%ioffset_update(n_byte=self%write_on_scratch_dataarray(u=u, v=v, w=w, x=x, y=y, z=z))
  error = self%error
  endfunction write_dataarray6_rank3_I8P