Set access

addelset	Add an element to set.
fnlset	Finalize a set.
getelsetndx	Get the index of a set element.
getelsetval	Get the value of an element of a set.
getfirstsetndx	Get the index of the first element in a given set.
getlastsetndx	Get the index of the last element in a set.
getsetsize	Get the size of a set.
getsettype	Get the type of a set.
isinset	Check if an element is contained in a set.
mapset	Modify the structure of a set for fast element retrieval.
resetset	Remove all elements of a set.
unmapset	Restore a mapped set to its initial state.