def _parse_value(cls, stream_rdr, offset, value_count, value_offset):
        """
        Return the ASCII string parsed from *stream_rdr* at *value_offset*.
        The length of the string, including a terminating '\x00' (NUL)
        character, is in *value_count*.
        """
        return stream_rdr.read_str(value_count-1, value_offset)