spot::couvreur99_check_shy Class Reference
[Emptiness-check algorithms]

A version of spot::couvreur99_check that tries to visit known states first. More...

#include <tgbaalgos/gtec/gtec.hh>

Inheritance diagram for spot::couvreur99_check_shy:

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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_shy (const tgba *a, option_map o=option_map(), const numbered_state_heap_factory *nshf=numbered_state_heap_hash_map_factory::instance())
virtual ~couvreur99_check_shy ()
virtual emptiness_check_resultcheck ()
 Check whether the automaton's language is empty.
virtual std::ostream & print_stats (std::ostream &os) const
 Print statistics, if any.
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 const unsigned_statisticsstatistics () const
 Return statistics, if available.
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 Types

typedef std::list< successorsucc_queue
typedef std::list< todo_itemtodo_list

Protected Member Functions

void clear_todo ()
virtual numbered_state_heap::state_index_p find_state (const state *s)
 find the SCC number of a unprocessed state.
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

std::stack< bdd > arc
int num
succ_queue::iterator pos
todo_list todo
bool group_
 Whether successors should be grouped for states in the same SCC.
bool group2_
bool onepass_
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.

Classes

struct  successor
struct  todo_item

Detailed Description

A version of spot::couvreur99_check that tries to visit known states first.

See the documentation for spot::couvreur99.


Member Typedef Documentation

typedef std::list<successor> spot::couvreur99_check_shy::succ_queue [protected]

typedef std::list<todo_item> spot::couvreur99_check_shy::todo_list [protected]

typedef unsigned(unsigned_statistics::*) spot::unsigned_statistics::unsigned_fun() const [inherited]

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


Constructor & Destructor Documentation

spot::couvreur99_check_shy::couvreur99_check_shy ( 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_shy::~couvreur99_check_shy (  )  [virtual]


Member Function Documentation

virtual emptiness_check_result* spot::couvreur99_check_shy::check (  )  [virtual]

Check whether the automaton's language is empty.

Reimplemented from spot::couvreur99_check.

void spot::couvreur99_check_shy::clear_todo (  )  [protected]

virtual numbered_state_heap::state_index_p spot::couvreur99_check_shy::find_state ( const state s  )  [protected, virtual]

find the SCC number of a unprocessed state.

Sometimes we want to modify some of the above structures when looking up a new state. This happens for instance when find() must perform inclusion checking and add new states to process to TODO during this step. (Because TODO must be known, sub-classing spot::numbered_state_heap is not enough.) Then overriding this method is the way to go.

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

Print statistics, if any.

Reimplemented from spot::emptiness_check.

const couvreur99_check_status* spot::couvreur99_check::result (  )  const [inherited]

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.

void spot::couvreur99_check::remove_component ( const state start_delete  )  [protected, inherited]

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.

unsigned spot::couvreur99_check::get_removed_components (  )  const [protected, inherited]

unsigned spot::couvreur99_check::get_vmsize (  )  const [protected, inherited]

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

The automaton that this emptiness-check inspects.

const option_map& spot::emptiness_check::options (  )  const [inline, inherited]

Return the options parametrizing how the emptiness check is realized.

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

Modify the algorithm options.

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

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

virtual const unsigned_statistics* spot::emptiness_check::statistics (  )  const [virtual, inherited]

Return statistics, if available.

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

Notify option updates.

void spot::ec_statistics::set_states ( unsigned  n  )  [inline, inherited]

void spot::ec_statistics::inc_states (  )  [inline, inherited]

void spot::ec_statistics::inc_transitions (  )  [inline, inherited]

void spot::ec_statistics::inc_depth ( unsigned  n = 1  )  [inline, inherited]

void spot::ec_statistics::dec_depth ( unsigned  n = 1  )  [inline, inherited]

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

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

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

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

unsigned spot::unsigned_statistics::get ( const char *  str  )  const [inline, inherited]


Member Data Documentation

std::stack<bdd> spot::couvreur99_check_shy::arc [protected]

int spot::couvreur99_check_shy::num [protected]

succ_queue::iterator spot::couvreur99_check_shy::pos [protected]

todo_list spot::couvreur99_check_shy::todo [protected]

bool spot::couvreur99_check_shy::group_ [protected]

Whether successors should be grouped for states in the same SCC.

bool spot::couvreur99_check_shy::group2_ [protected]

bool spot::couvreur99_check_shy::onepass_ [protected]

couvreur99_check_status* spot::couvreur99_check::ecs_ [protected, inherited]

bool spot::couvreur99_check::poprem_ [protected, inherited]

Whether to store the state to be removed.

unsigned spot::couvreur99_check::removed_components [protected, inherited]

Number of dead SCC removed by the algorithm.

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

The automaton.

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

The options.

stats_map spot::unsigned_statistics::stats [inherited]


The documentation for this class was generated from the following file:
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Generated on Tue Jul 17 15:14:45 2007 for spot by doxygen 1.5.2