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Make it easy to filter states while iterating over an automaton.

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* src/tgbaalgos/reachiter.hh (tgba_reachable_iterator::want_state):
New method.
* src/tgbaalgos/reachiter.cc (tgba_reachable_iterator::want_state):
Implement it.
(tgba_reachable_iterator::run): Call want_state before processing
a state.
This commit is contained in:
Alexandre Duret-Lutz 2009-11-18 14:54:53 +01:00
parent 38148f87f8
commit ac5dda1032
3 changed files with 33 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

22
src/tgbaalgos/reachiter.cc
View file

@ -1,4 +1,4 @@
// Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
// Copyright (C) 2003, 2004, 2009 Laboratoire d'Informatique de Paris 6 (LIP6),
// département Systèmes Répartis Coopératifs (SRC), Université Pierre
// et Marie Curie.
//
@ -50,7 +50,8 @@ namespace spot
int n = 0;
start();
state* i = automata_->get_init_state();
add_state(i);
if (want_state(i))
add_state(i);
seen[i] = ++n;
const state* t;
while ((t = next_state()))
@ -63,15 +64,20 @@ namespace spot
{
const state* current = si->current_state();
seen_map::const_iterator s = seen.find(current);
bool ws = want_state(current);
if (s == seen.end())
{
seen[current] = ++n;
add_state(current);
process_link(t, tn, current, n, si);
if (ws)
{
add_state(current);
process_link(t, tn, current, n, si);
}
}
else
{
process_link(t, tn, s->first, s->second, si);
if (ws)
process_link(t, tn, s->first, s->second, si);
delete current;
}
}
@ -80,6 +86,12 @@ namespace spot
end();
}
bool
tgba_reachable_iterator::want_state(const state*) const
{
return true;
}
void
tgba_reachable_iterator::start()
{