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tgba/tgbaexplicit.hh

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00001 // Copyright (C) 2003  Laboratoire d'Informatique de Paris 6 (LIP6),
00002 // département Systèmes Répartis Coopératifs (SRC), Université Pierre
00003 // et Marie Curie.
00004 //
00005 // This file is part of Spot, a model checking library.
00006 //
00007 // Spot is free software; you can redistribute it and/or modify it
00008 // under the terms of the GNU General Public License as published by
00009 // the Free Software Foundation; either version 2 of the License, or
00010 // (at your option) any later version.
00011 //
00012 // Spot is distributed in the hope that it will be useful, but WITHOUT
00013 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
00014 // or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
00015 // License for more details.
00016 //
00017 // You should have received a copy of the GNU General Public License
00018 // along with Spot; see the file COPYING.  If not, write to the Free
00019 // Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
00020 // 02111-1307, USA.
00021 
00022 #ifndef SPOT_TGBA_TGBAEXPLICIT_HH
00023 # define SPOT_TGBA_TGBAEXPLICIT_HH
00024 
00025 #include "misc/hash.hh"
00026 #include <list>
00027 #include "tgba.hh"
00028 #include "ltlast/formula.hh"
00029 
00030 namespace spot
00031 {
00032   // Forward declarations.  See below.
00033   class state_explicit;
00034   class tgba_explicit_succ_iterator;
00035 
00037   class tgba_explicit: public tgba
00038   {
00039   public:
00040     tgba_explicit(bdd_dict* dict);
00041 
00042     struct transition;
00043     typedef std::list<transition*> state;
00044 
00046     struct transition
00047     {
00048       bdd condition;
00049       bdd acceptance_conditions;
00050       state* dest;
00051     };
00052 
00053     void set_init_state(const std::string& state);
00054 
00055     transition*
00056     create_transition(const std::string& source, const std::string& dest);
00057 
00058     void add_condition(transition* t, const ltl::formula* f);
00060     void add_conditions(transition* t, bdd f);
00061     void declare_acceptance_condition(const ltl::formula* f);
00062     bool has_acceptance_condition(const ltl::formula* f) const;
00063     void add_acceptance_condition(transition* t, const ltl::formula* f);
00065     void add_acceptance_conditions(transition* t, bdd f);
00066     void complement_all_acceptance_conditions();
00067     void merge_transitions();
00068 
00069     // tgba interface
00070     virtual ~tgba_explicit();
00071     virtual spot::state* get_init_state() const;
00072     virtual tgba_succ_iterator*
00073     succ_iter(const spot::state* local_state,
00074               const spot::state* global_state = 0,
00075               const tgba* global_automaton = 0) const;
00076     virtual bdd_dict* get_dict() const;
00077     virtual std::string format_state(const spot::state* state) const;
00078 
00079     virtual bdd all_acceptance_conditions() const;
00080     virtual bdd neg_acceptance_conditions() const;
00081 
00082   protected:
00083     virtual bdd compute_support_conditions(const spot::state* state) const;
00084     virtual bdd compute_support_variables(const spot::state* state) const;
00085 
00086     state* add_state(const std::string& name);
00087     bdd get_acceptance_condition(const ltl::formula* f);
00088 
00089     typedef Sgi::hash_map<const std::string, tgba_explicit::state*,
00090                           string_hash> ns_map;
00091     typedef Sgi::hash_map<const tgba_explicit::state*, std::string,
00092                           ptr_hash<tgba_explicit::state> > sn_map;
00093     ns_map name_state_map_;
00094     sn_map state_name_map_;
00095     bdd_dict* dict_;
00096     tgba_explicit::state* init_;
00097     mutable bdd all_acceptance_conditions_;
00098     bdd neg_acceptance_conditions_;
00099     mutable bool all_acceptance_conditions_computed_;
00100 
00101   private:
00102     // Disallow copy.
00103     tgba_explicit(const tgba_explicit& other);
00104     tgba_explicit& tgba_explicit::operator=(const tgba_explicit& other);
00105   };
00106 
00107 
00109   class state_explicit : public spot::state
00110   {
00111   public:
00112     state_explicit(const tgba_explicit::state* s)
00113       : state_(s)
00114     {
00115     }
00116 
00117     virtual int compare(const spot::state* other) const;
00118     virtual size_t hash() const;
00119     virtual state_explicit* clone() const;
00120 
00121     virtual ~state_explicit()
00122     {
00123     }
00124 
00125     const tgba_explicit::state* get_state() const;
00126   private:
00127     const tgba_explicit::state* state_;
00128   };
00129 
00130 
00132   class tgba_explicit_succ_iterator: public tgba_succ_iterator
00133   {
00134   public:
00135     tgba_explicit_succ_iterator(const tgba_explicit::state* s, bdd all_acc);
00136 
00137     virtual
00138     ~tgba_explicit_succ_iterator()
00139     {
00140     }
00141 
00142     virtual void first();
00143     virtual void next();
00144     virtual bool done() const;
00145 
00146     virtual state_explicit* current_state() const;
00147     virtual bdd current_condition() const;
00148     virtual bdd current_acceptance_conditions() const;
00149 
00150   private:
00151     const tgba_explicit::state* s_;
00152     tgba_explicit::state::const_iterator i_;
00153     bdd all_acceptance_conditions_;
00154   };
00155 
00156 }
00157 
00158 #endif // SPOT_TGBA_TGBAEXPLICIT_HH

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