NFA regex optimization: use just one set array.

We don't have to flip between two arrays, since the
nfa_closure and and nfa_move_closure can write the
output set into the same array.

* regex.c (struct nfa_machine): Replace flip and flop
members with a single set.
(nfa_closure, nfa_move_closure): out array parameter removed;
in renamed to set.  References to in and out simply replaced
with set.
(nfa_run): Allocate one set instead of two, plus the stack.
Remove code to swap the two pointers on each iteration.
(regex_machine_reset): Prepare initial closure in the one
and only set array.
(regex_machine_init): Allocate set array, rather than flip an
flop.
(regex_machine_cleanup): Free set array and null out pointer
rather than flip and flop arrays.
(regex_machine_feed): Pass just the set ot the
nfa_move_closure function. Remove flip/flop pointer swapping

0 files changed, 0 insertions, 0 deletions