# File ../lib/roller/BinaryIO/BinaryWriter.rb, line 35
        def _write(value, size, format)
    # If not an array, make it into a single-element array so we can pack it.
                value = [value] unless value.is_a? Array

                num_bytes = value.size * size
                arr = value.pack(format * value.size)

    begin
      num_bytes_written = @handle.write(arr)
    rescue IOError => exception
      raise BinaryWriteError, exception.message
    end

    unless num_bytes_written == num_bytes
      raise BinaryWriteError, "Wrote #{num_bytes_written} bytes when expecting #{num_bytes} bytes"
    end
        end