Possible to get LIMIT in an index access method?

I'm developing an index access method.

SELECT *

FROM foo

WHERE col <=> constant

ORDER BY col <==> constant

LIMIT 10;

I'm successfully getting the WHERE and the ORDER BY clauses in my beginscan() method. Is there any way to get the LIMIT (or OFFSET, for that matter)?

My access method is designed such that you have to fetch the entire result set in one go. It's not streaming, like most access methods. As such, it would be very helpful to know up front how many items I need to fetch from the index.