Method getCursorAdjustment

src/remote/remote.h:782–791

	}

	SLONG getCursorAdjustment() const
	{
		if (rsr_fetch_operation != fetch_next && rsr_fetch_operation != fetch_prior)
			return 0;

		const bool isEnd = rsr_flags.test(Rsr::STREAM_END) && !rsr_flags.test(Rsr::PAST_END);
		const SLONG offset = rsr_msgs_waiting + (isEnd ? 1 : 0);
		const bool isAhead = (rsr_fetch_operation == fetch_next);
		return isAhead ? -offset : offset;
	}
};