Commit ff83e92d authored by Alexandre Duret-Lutz's avatar Alexandre Duret-Lutz
Browse files

tgba_digraph: Fix handling of initial state.

* src/tgba/tgbagraph.hh: Store the number of the initial state, not a
pointer to it, because if the state vector is reallocated due to some
later calls to new_state(), this pointer will be invalid.
* src/graphtest/tgbagraph.cc, src/graphtest/tgbagraph.test: Test
for this.
parent fd5fbda4
......@@ -82,6 +82,11 @@ void f1()
std::cerr << tg.num_transitions() << '\n';
assert(tg.num_transitions() == 5);
// Add enough states so that the state vector is reallocated.
for (unsigned i = 0; i < 100; ++i)
tg.new_state();
spot::dotty_reachable(std::cout, &tg);
}
int main()
......
......@@ -96,6 +96,18 @@ digraph G {
3 -> 1 [label="1\n{Acc[p2], Acc[p1]}"]
3 -> 2 [label="!p1 | p2\n"]
}
digraph G {
0 [label="", style=invis, height=0]
0 -> 1
1 [label="0"]
1 -> 2 [label="p1\n"]
1 -> 3 [label="p2\n{Acc[p2]}"]
2 [label="1"]
2 -> 3 [label="p1 & p2\n{Acc[p1]}"]
3 [label="2"]
3 -> 1 [label="1\n{Acc[p2], Acc[p1]}"]
3 -> 2 [label="!p1 | p2\n"]
}
EOF
diff stdout expected
......
......@@ -33,6 +33,11 @@ namespace spot
struct SPOT_API tgba_graph_state: public spot::state
{
public:
tgba_graph_state():
spot::state()
{
}
virtual ~tgba_graph_state() noexcept
{
}
......@@ -158,14 +163,14 @@ namespace spot
bdd_dict* dict_;
bdd all_acceptance_conditions_;
bdd neg_acceptance_conditions_;
mutable const tgba_graph_state* init_;
mutable unsigned init_number_;
public:
tgba_digraph(bdd_dict* dict)
: dict_(dict),
all_acceptance_conditions_(bddfalse),
neg_acceptance_conditions_(bddtrue),
init_(nullptr)
init_number_(0)
{
}
......@@ -223,31 +228,28 @@ namespace spot
void set_init_state(graph_t::state s)
{
init_ = &g_.state_data(s);
assert(s < num_states());
init_number_ = s;
}
void set_init_state(const state* s)
{
init_ = down_cast<const tgba_graph_state*>(s);
assert(init_);
set_init_state(state_number(s));
}
virtual tgba_graph_state* get_init_state() const
virtual graph_t::state get_init_state_number() const
{
if (num_states() == 0)
const_cast<graph_t&>(g_).new_state();
if (!init_)
init_ = &g_.state_data(0);
return const_cast<tgba_graph_state*>(init_);
return init_number_;
}
virtual graph_t::state get_init_state_number() const
// FIXME: The return type ought to be const.
virtual tgba_graph_state* get_init_state() const
{
if (num_states() == 0)
const_cast<graph_t&>(g_).new_state();
if (!init_)
return 0;
return state_number(init_);
return const_cast<tgba_graph_state*>(state_from_number(init_number_));
}
virtual tgba_succ_iterator*
......@@ -276,7 +278,7 @@ namespace spot
return s - &g_.state_storage(0);
}
const state*
const tgba_graph_state*
state_from_number(graph_t::state n) const
{
return &g_.state_data(n);
......
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