Public Types | Public Member Functions | Public Attributes | Protected Member Functions | Protected Attributes

spot::couvreur99_check Class Reference
[Emptiness-check algorithms]

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

#include <tgbaalgos/gtec/gtec.hh>

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List of all members.

Public Types

typedef unsigned(unsigned_statistics::* unsigned_fun )() const
typedef std::map< const char
*, unsigned_fun,
char_ptr_less_than
stats_map

Public Member Functions

 couvreur99_check (const tgba *a, option_map o=option_map(), const numbered_state_heap_factory *nshf=numbered_state_heap_hash_map_factory::instance())
virtual ~couvreur99_check ()
virtual emptiness_check_resultcheck ()
 Check whether the automaton's language is empty.
virtual std::ostream & print_stats (std::ostream &os) const
const couvreur99_check_statusresult () const
 Return the status of the emptiness-check.
const tgbaautomaton () const
 The automaton that this emptiness-check inspects.
const option_mapoptions () const
 Return the options parametrizing 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 emptiness_check_resultcheck ()=0
 Check whether the automaton contain an accepting run.
virtual const unsigned_statisticsstatistics () const
 Return statistics, if available.
virtual std::ostream & print_stats (std::ostream &os) const
 Print statistics, if any.
virtual void options_updated (const option_map &old)
 Notify option updates.
void set_states (unsigned n)
void inc_states ()
void inc_transitions ()
void inc_depth (unsigned n=1)
void dec_depth (unsigned n=1)
unsigned states () const
unsigned transitions () const
unsigned max_depth () const
unsigned depth () const
unsigned get (const char *str) const

Public Attributes

stats_map stats

Protected Member Functions

void remove_component (const state *start_delete)
 Remove a strongly component from the hash.
unsigned get_removed_components () const
unsigned get_vmsize () const

Protected Attributes

couvreur99_check_statusecs_
bool poprem_
 Whether to store the state to be removed.
unsigned removed_components
 Number of dead SCC removed by the algorithm.
const tgbaa_
 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

typedef std::map<const char*, unsigned_fun, char_ptr_less_than> spot::unsigned_statistics::stats_map [inherited]
typedef unsigned(unsigned_statistics::* spot::unsigned_statistics::unsigned_fun)() const [inherited]

Constructor & Destructor Documentation

spot::couvreur99_check::couvreur99_check ( const tgba a,
option_map  o = option_map(),
const numbered_state_heap_factory nshf = numbered_state_heap_hash_map_factory::instance() 
)
virtual spot::couvreur99_check::~couvreur99_check (  )  [virtual]

Member Function Documentation

const tgba* spot::emptiness_check::automaton (  )  const [inline, inherited]

The automaton that this emptiness-check inspects.

References spot::emptiness_check::a_.

virtual emptiness_check_result* spot::emptiness_check::check (  )  [pure virtual, inherited]

Check whether the automaton contain an accepting run.

Return 0 if the automaton accepts no run. Return an instance of emptiness_check_result otherwise. This instance might allow to obtain one sample acceptance run. The result has to be destroyed before the emptiness_check instance that generated it.

Some emptiness_check algorithms may allow check() to be called several time, but generally you should not assume that.

Some emptiness_check algorithms, especially those using bit state hashing may return 0 even if the automaton is not empty.

See also:
safe()
virtual emptiness_check_result* spot::couvreur99_check::check (  )  [virtual]

Check whether the automaton's language is empty.

Reimplemented in spot::couvreur99_check_shy.

void spot::ec_statistics::dec_depth ( unsigned  n = 1  )  [inline, inherited]
unsigned spot::ec_statistics::depth (  )  const [inline, inherited]
unsigned spot::unsigned_statistics::get ( const char *  str  )  const [inline, inherited]
unsigned spot::couvreur99_check::get_removed_components (  )  const [protected]
unsigned spot::couvreur99_check::get_vmsize (  )  const [protected]
void spot::ec_statistics::inc_depth ( unsigned  n = 1  )  [inline, inherited]
void spot::ec_statistics::inc_states (  )  [inline, inherited]
void spot::ec_statistics::inc_transitions (  )  [inline, inherited]
unsigned spot::ec_statistics::max_depth (  )  const [inline, inherited]
const option_map& spot::emptiness_check::options (  )  const [inline, inherited]

Return the options parametrizing how the emptiness check is realized.

References spot::emptiness_check::o_.

virtual void spot::emptiness_check::options_updated ( const option_map old  )  [virtual, inherited]

Notify option updates.

const char* spot::emptiness_check::parse_options ( char *  options  )  [inherited]

Modify the algorithm options.

virtual std::ostream& spot::couvreur99_check::print_stats ( std::ostream &  os  )  const [virtual]
virtual std::ostream& spot::emptiness_check::print_stats ( std::ostream &  os  )  const [virtual, inherited]

Print statistics, if any.

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.

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.

virtual bool spot::emptiness_check::safe (  )  const [virtual, inherited]

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

void spot::ec_statistics::set_states ( unsigned  n  )  [inline, inherited]
unsigned spot::ec_statistics::states (  )  const [inline, inherited]
virtual const unsigned_statistics* spot::emptiness_check::statistics (  )  const [virtual, inherited]

Return statistics, if available.

unsigned spot::ec_statistics::transitions (  )  const [inline, inherited]

Member Data Documentation

const tgba* spot::emptiness_check::a_ [protected, inherited]

The automaton.

Referenced by spot::emptiness_check::automaton().

option_map spot::emptiness_check::o_ [protected, inherited]

The options.

Referenced by spot::emptiness_check::options().

Whether to store the state to be removed.

Number of dead SCC removed by the algorithm.


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

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