spot::couvreur99_check Class Reference

An implementation of the Couvreur99 emptiness-check algorithm. More...

#include <spot/twaalgos/gtec/gtec.hh>

Inheritance diagram for spot::couvreur99_check:

Collaboration diagram for spot::couvreur99_check:

Public Types
typedef unsigned(unsigned_statistics::*	unsigned_fun) () const
	Function pointer type for unsigned statistics getters.
typedef std::map< const char *, unsigned_fun, char_ptr_less_than >	stats_map
	Map from statistic names to getter function pointers.

Public Member Functions
	couvreur99_check (const const_twa_ptr &a, option_map o=option_map())
	Construct an emptiness check for the given automaton and options.
virtual emptiness_check_result_ptr	check () override
	Check whether the automaton's language is empty.
virtual std::ostream &	print_stats (std::ostream &os) const override
	Print statistics, if any.
std::shared_ptr< const couvreur99_check_status >	result () const
	Return the status of the emptiness-check.
void	set_states (unsigned n)
	Set the number of visited states.
void	inc_states ()
	Increment the number of visited states.
void	inc_transitions ()
	Increment the number of visited transitions.
void	inc_depth (unsigned n=1)
	Increase the current DFS depth by n.
void	dec_depth (unsigned n=1)
	Decrease the current DFS depth by n.
unsigned	states () const
	Return the number of visited states.
unsigned	transitions () const
	Return the number of visited transitions.
unsigned	max_depth () const
	Return the maximum DFS depth reached.
unsigned	depth () const
	Return the current DFS depth.
unsigned	get (const char *str) const
	Retrieve a named statistic by its key.
const const_twa_ptr &	automaton () const
	The automaton that this emptiness-check inspects.
const option_map &	options () const
	Return the options parameterizing how the emptiness check is realized.
const char *	parse_options (char *options)
	Modify the algorithm options.
virtual bool	safe () const
	Return false iff accepting_run() can return 0 for non-empty automata.
virtual const unsigned_statistics *	statistics () const
	Return statistics, if available.
virtual const ec_statistics *	emptiness_check_statistics () const
	Return emptiness check statistics, if available.
virtual void	options_updated (const option_map &old)
	Notify option updates.

Public Attributes
stats_map	stats
	Map of available statistics.

Protected Member Functions
void	remove_component (const state *start_delete)
	Remove a strongly component from the hash.
unsigned	get_removed_components () const
	Return the number of dead SCCs removed by the algorithm.
unsigned	get_vmsize () const
	Return the virtual memory size used by the process (in kB).

Protected Attributes
std::shared_ptr< couvreur99_check_status >	ecs_
	Shared status object holding the DFS data structures.
bool	poprem_
	Whether to store the state to be removed.
unsigned	removed_components
	Number of dead SCC removed by the algorithm.
const_twa_ptr	a_
	The automaton.
option_map	o_
	The options.

Detailed Description

An implementation of the Couvreur99 emptiness-check algorithm.

See the documentation for spot::couvreur99.

Member Typedef Documentation

stats_map

typedef std::map<const char*, unsigned_fun, char_ptr_less_than> spot::unsigned_statistics::stats_map

inherited

Map from statistic names to getter function pointers.

unsigned_fun

typedef unsigned(unsigned_statistics::* spot::unsigned_statistics::unsigned_fun) () const

inherited

Function pointer type for unsigned statistics getters.

Constructor & Destructor Documentation

couvreur99_check()

spot::couvreur99_check::couvreur99_check	(	const const_twa_ptr &	a,
		option_map	o = option_map()
	)

Construct an emptiness check for the given automaton and options.

Member Function Documentation

automaton()

const const_twa_ptr & spot::emptiness_check::automaton ( ) const

inlineinherited

The automaton that this emptiness-check inspects.

check()

virtual emptiness_check_result_ptr spot::couvreur99_check::check ( )

overridevirtual

Check whether the automaton's language is empty.

Implements spot::emptiness_check.

Reimplemented in spot::couvreur99_check_shy.

dec_depth()

void spot::ec_statistics::dec_depth ( unsigned  n = 1 )

inlineinherited

Decrease the current DFS depth by n.

depth()

unsigned spot::ec_statistics::depth ( ) const

inlineinherited

Return the current DFS depth.

emptiness_check_statistics()

virtual const ec_statistics * spot::emptiness_check::emptiness_check_statistics ( ) const

virtualinherited

Return emptiness check statistics, if available.

get()

unsigned spot::unsigned_statistics::get ( const char *  str ) const

inlineinherited

Retrieve a named statistic by its key.

References spot::unsigned_statistics::stats.

get_removed_components()

unsigned spot::couvreur99_check::get_removed_components ( ) const

protected

Return the number of dead SCCs removed by the algorithm.

get_vmsize()

unsigned spot::couvreur99_check::get_vmsize ( ) const

protected

Return the virtual memory size used by the process (in kB).

inc_depth()

void spot::ec_statistics::inc_depth ( unsigned  n = 1 )

inlineinherited

Increase the current DFS depth by n.

inc_states()

void spot::ec_statistics::inc_states ( )

inlineinherited

Increment the number of visited states.

inc_transitions()

void spot::ec_statistics::inc_transitions ( )

inlineinherited

Increment the number of visited transitions.

max_depth()

unsigned spot::ec_statistics::max_depth ( ) const

inlineinherited

Return the maximum DFS depth reached.

options()

const option_map & spot::emptiness_check::options ( ) const

inlineinherited

Return the options parameterizing how the emptiness check is realized.

options_updated()

virtual void spot::emptiness_check::options_updated ( const option_map &  old )

virtualinherited

Notify option updates.

parse_options()

const char * spot::emptiness_check::parse_options ( char *  options )

inherited

Modify the algorithm options.

print_stats()

virtual std::ostream & spot::couvreur99_check::print_stats ( std::ostream &  os ) const

overridevirtual

Print statistics, if any.

Reimplemented from spot::emptiness_check.

remove_component()

void spot::couvreur99_check::remove_component ( const state *  start_delete )

protected

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.

result()

std::shared_ptr< const couvreur99_check_status > spot::couvreur99_check::result

(

)

const

Return the status of the emptiness-check.

When check() succeed, the status should be passed along to spot::counter_example.

This status should not be deleted, it is a pointer to a member of this class that will be deleted when the couvreur99 object is deleted.

safe()

virtual bool spot::emptiness_check::safe ( ) const

virtualinherited

Return false iff accepting_run() can return 0 for non-empty automata.

set_states()

void spot::ec_statistics::set_states ( unsigned  n )

inlineinherited

Set the number of visited states.

states()

unsigned spot::ec_statistics::states ( ) const

inlineinherited

Return the number of visited states.

statistics()

virtual const unsigned_statistics * spot::emptiness_check::statistics ( ) const

virtualinherited

Return statistics, if available.

transitions()

unsigned spot::ec_statistics::transitions ( ) const

inlineinherited

Return the number of visited transitions.

Member Data Documentation

a_

const_twa_ptr spot::emptiness_check::a_

protectedinherited

The automaton.

ecs_

std::shared_ptr<couvreur99_check_status> spot::couvreur99_check::ecs_

protected

Shared status object holding the DFS data structures.

o_

option_map spot::emptiness_check::o_

protectedinherited

The options.

poprem_

bool spot::couvreur99_check::poprem_

protected

Whether to store the state to be removed.

removed_components

unsigned spot::couvreur99_check::removed_components

protected

Number of dead SCC removed by the algorithm.

stats

stats_map spot::unsigned_statistics::stats

inherited

Map of available statistics.

Referenced by spot::unsigned_statistics::get().

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The documentation for this class was generated from the following file:

• spot/twaalgos/gtec/gtec.hh