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Commit f0dd415f authored by Alexandre Duret-Lutz's avatar Alexandre Duret-Lutz
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* src/tgbaalgos/emptinesscheck.hh (emptiness_check::seen_state_num): 

Rename as ...
(emptiness_check::h): ... this, and define as a hash_map.
(emptiness_check::remove_component): Remove superfluous state_map
argument.
* src/tgbaalgos/emptinesscheck.cc: Adjust.
parent dfdefdf6
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ChangeLog
View file @ f0dd415f
2003-10-23 Alexandre Duret-Lutz <adl@src.lip6.fr>
* src/tgbaalgos/emptinesscheck.hh (emptiness_check::seen_state_num):
Rename as ...
(emptiness_check::h): ... this, and define as a hash_map.
(emptiness_check::remove_component): Remove superfluous state_map
argument.
* src/tgbaalgos/emptinesscheck.cc: Adjust.
* src/tgbaalgos/emptinesscheck.hh, src/tgbaalgos/emptinesscheck.cc:
Remove superfluous includes.
......
src/tgbaalgos/emptinesscheck.cc
View file @ f0dd415f
......@@ -3,6 +3,7 @@
#include <queue>
#include <stdio.h>
#include <vector>
#include <map>
namespace spot
{
......@@ -22,11 +23,10 @@ namespace spot
}
void
emptiness_check::remove_component(seen& state_map,
const state* start_delete)
emptiness_check::remove_component(const state* start_delete)
{
std::stack<tgba_succ_iterator*> to_remove;
state_map[start_delete] = -1;
h[start_delete] = -1;
tgba_succ_iterator* iter_delete = aut_->succ_iter(start_delete);
iter_delete->first();
to_remove.push(iter_delete);
......@@ -39,9 +39,9 @@ namespace spot
to_remove.push(succ_delete);
state* curr_state = succ_delete->current_state();
succ_delete->next();
if (state_map[curr_state] != -1)
if (h[curr_state] != -1)
{
state_map[curr_state] = -1;
h[curr_state] = -1;
tgba_succ_iterator* succ_delete2 = aut_->succ_iter(curr_state);
succ_delete2->first();
to_remove.push(succ_delete2);
......@@ -57,7 +57,7 @@ namespace spot
std::stack<bdd> arc_accepting;
int nbstate = 1;
state* init = aut_->get_init_state();
seen_state_num[init] = 1;
h[init] = 1;
root_component.push(connected_component(1));
arc_accepting.push(bddfalse);
tgba_succ_iterator* iter_ = aut_->succ_iter(init);
......@@ -72,12 +72,12 @@ namespace spot
assert(!root_component.empty());
connected_component comp_tmp = root_component.top();
root_component.pop();
seen::iterator i_0 = seen_state_num.find(step.first);
assert(i_0 != seen_state_num.end());
if (comp_tmp.index == seen_state_num[step.first])
hash_type::iterator i_0 = h.find(step.first);
assert(i_0 != h.end());
if (comp_tmp.index == h[step.first])
{
// The current node is a root of a Strong Connected Component.
emptiness_check::remove_component(seen_state_num, step.first);
emptiness_check::remove_component(step.first);
assert(!arc_accepting.empty());
arc_accepting.pop();
assert(root_component.size() == arc_accepting.size());
......@@ -93,28 +93,28 @@ namespace spot
iter_ = step.second;
state* current_state = iter_->current_state();
bdd current_accepting = iter_->current_accepting_conditions();
seen::iterator i = seen_state_num.find(current_state);
hash_type::iterator i = h.find(current_state);
iter_->next();
if (i == seen_state_num.end())
if (i == h.end())
{
// New node.
nbstate = nbstate + 1;
assert(nbstate != 0);
seen_state_num[current_state] = nbstate;
h[current_state] = nbstate;
root_component.push(connected_component(nbstate));
arc_accepting.push(current_accepting);
tgba_succ_iterator* iter2 = aut_->succ_iter(current_state);
iter2->first();
todo.push(pair_state_iter(current_state, iter2 ));
}
else if (seen_state_num[current_state] != -1)
else if (h[current_state] != -1)
{
// A node with order != -1 (a seen node not removed).
assert(!root_component.empty());
connected_component comp = root_component.top();
root_component.pop();
bdd new_condition = current_accepting;
int current_index = seen_state_num[current_state];
int current_index = h[current_state];
while (comp.index > current_index)
{
// root_component and arc_accepting are popped
......@@ -215,8 +215,8 @@ namespace spot
int q_index;
int tmp_int = 0;
// Fill the SCC in the stack root_component.
for (seen::iterator iter_map = seen_state_num.begin();
iter_map != seen_state_num.end(); ++iter_map)
for (hash_type::iterator iter_map = h.begin();
iter_map != h.end(); ++iter_map)
{
q_index = iter_map->second;
tmp_int = 0;
......@@ -261,18 +261,15 @@ namespace spot
const state* curr_father = started_from.first;
seq.push_front(*iter_set);
seq.push_front(curr_father);
seen::iterator i_2 =
seen_state_num.find(curr_father);
assert(i_2 != seen_state_num.end());
while ((vec_component[k].index
< seen_state_num[curr_father])
&& (seen_state_num[curr_father] != 1))
hash_type::iterator i_2 = h.find(curr_father);
assert(i_2 != h.end());
while ((vec_component[k].index < h[curr_father])
&& (h[curr_father] != 1))
{
seq.push_front(path_map[curr_father]);
curr_father = path_map[curr_father];
seen::iterator i_3 =
seen_state_num.find(curr_father);
assert(i_3 != seen_state_num.end());
hash_type::iterator i_3 = h.find(curr_father);
assert(i_3 != h.end());
}
vec_sequence[k] = seq;
seq.clear();
......@@ -287,11 +284,10 @@ namespace spot
{
path_state::iterator i_path =
path_map.find(curr_state);
seen::iterator i_seen =
seen_state_num.find(curr_state);
hash_type::iterator i_seen = h.find(curr_state);
if (i_seen != seen_state_num.end()
&& seen_state_num[curr_state] > 0
if (i_seen != h.end()
&& h[curr_state] > 0
&& i_path == path_map.end())
{
todo_trace.
......@@ -326,7 +322,7 @@ namespace spot
const state* from_state,
const state* to_state)
{
if (seen_state_num[from_state] != seen_state_num[to_state])
if (h[from_state] != h[to_state])
{
std::map<const state*, state_proposition,
state_ptr_less_than> complete_map;
......@@ -382,7 +378,7 @@ namespace spot
emptiness_check::accepting_path(const connected_component& comp_path,
const state* start_path, bdd to_accept)
{
seen seen_priority;
hash_type seen_priority;
std::stack<triplet> todo_path;
tgba_succ_iterator* t_s_i = aut_->succ_iter(start_path);
t_s_i->first();
......@@ -392,7 +388,7 @@ namespace spot
cycle_path tmp_lst;
cycle_path best_lst;
bool ok = false;
seen_priority[start_path] = seen_state_num[start_path];
seen_priority[start_path] = h[start_path];
while (!todo_path.empty())
{
triplet step_ = todo_path.top();
......@@ -410,7 +406,7 @@ namespace spot
comp_path.state_set.find(curr_state);
if (it_set != comp_path.state_set.end())
{
seen::iterator i = seen_priority.find(curr_state);
hash_type::iterator i = seen_priority.find(curr_state);
if (i == seen_priority.end())
{
tgba_succ_iterator* c_iter = aut_->succ_iter(curr_state);
......@@ -421,7 +417,7 @@ namespace spot
curr_bdd));
tmp_lst.push_back(state_proposition(curr_state,
iter_->current_condition()));
seen_priority[curr_state] = seen_state_num[curr_state];
seen_priority[curr_state] = h[curr_state];
}
else
{
......
src/tgbaalgos/emptinesscheck.hh
View file @ f0dd415f
......@@ -2,7 +2,7 @@
# define SPOT_EMPTINESS_CHECK_HH
#include "tgba/tgba.hh"
#include <map>
#include "misc/hash.hh"
#include <stack>
#include <list>
#include <set>
......@@ -53,7 +53,6 @@ namespace spot
/// \endverbatim
class emptiness_check
{
typedef std::map<const spot::state*, int, spot::state_ptr_less_than> seen;
typedef std::list<const state*> state_sequence;
typedef std::pair<const spot::state*, bdd> state_proposition;
typedef std::list<state_proposition> cycle_path;
......@@ -73,16 +72,19 @@ namespace spot
private:
const tgba* aut_;
std::stack<connected_component> root_component;
seen seen_state_num;
state_sequence suffix;
cycle_path period;
typedef Sgi::hash_map<const state*, int,
state_ptr_hash, state_ptr_equal> hash_type;
hash_type h; ///< Map of visited states.
/// \brief Remove a strongly component from the hash.
///
/// This function remove all accessible state from a given
/// state. In other words, it removes the strongly connected
/// component that contains this state.
void remove_component(seen& state_map, const state* start_delete);
void remove_component(const state* start_delete);
/// Called by counter_example to find a path which traverses all
/// accepting conditions in the accepted SCC.
......
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