spot  0.8.1
tgbareduc.hh
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00001 // Copyright (C) 2008, 2009, 2011 Laboratoire de Recherche et Développement
00002 // de l'Epita (LRDE).
00003 // Copyright (C) 2004, 2005, 2006 Laboratoire d'Informatique de
00004 // Paris 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
00005 // Université Pierre et Marie Curie.
00006 //
00007 // This file is part of Spot, a model checking library.
00008 //
00009 // Spot is free software; you can redistribute it and/or modify it
00010 // under the terms of the GNU General Public License as published by
00011 // the Free Software Foundation; either version 2 of the License, or
00012 // (at your option) any later version.
00013 //
00014 // Spot is distributed in the hope that it will be useful, but WITHOUT
00015 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
00016 // or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
00017 // License for more details.
00018 //
00019 // You should have received a copy of the GNU General Public License
00020 // along with Spot; see the file COPYING.  If not, write to the Free
00021 // Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
00022 // 02111-1307, USA.
00023 
00024 #ifndef SPOT_TGBA_TGBAREDUC_HH
00025 # define SPOT_TGBA_TGBAREDUC_HH
00026 
00027 #include "tgbaexplicit.hh"
00028 #include "tgbaalgos/reachiter.hh"
00029 
00030 #include <list>
00031 #include <vector>
00032 
00033 namespace spot
00034 {
00035   typedef std::pair<const spot::state*, const spot::state*> state_couple;
00036   typedef std::vector<state_couple*> simulation_relation;
00037 
00038   /*
00039     typedef std::vector<state_couple*> direct_simulation_relation;
00040     typedef std::vector<state_couple*> delayed_simulation_relation;
00041   */
00042 
00043   class direct_simulation_relation: public simulation_relation
00044   {
00045   };
00046   class delayed_simulation_relation: public simulation_relation
00047   {
00048   };
00049 
00050 
00053   class tgba_reduc:
00054     public tgba_explicit_string, public tgba_reachable_iterator_breadth_first
00055   {
00056   public:
00057     tgba_reduc(const tgba* a);
00058 
00059     ~tgba_reduc();
00060 
00063     void quotient_state(direct_simulation_relation* rel);
00064 
00067     void quotient_state(delayed_simulation_relation* rel);
00068 
00071     void delete_transitions(simulation_relation* rel);
00072 
00073     // For Debug
00074     void display_rel_sim(simulation_relation* rel, std::ostream& os);
00075     void display_scc(std::ostream& os);
00076 
00077   protected:
00078     typedef Sgi::hash_map<const tgba_explicit::state*,
00079                           std::list<state*>*,
00080                           ptr_hash<tgba_explicit::state> > sp_map;
00081     sp_map state_predecessor_map_;
00082 
00083     // Interface of tgba_reachable_iterator_breadth_first
00084     void process_state(const spot::state* s, int n, tgba_succ_iterator* si);
00085 
00087     transition* create_transition(const spot::state* source,
00088                                   const spot::state* dest);
00089 
00090 
00093     void redirect_transition(const spot::state* s,
00094                              const spot::state* simul);
00095 
00097     void remove_predecessor_state(const state* s, const state* p);
00098 
00101     void remove_state(const spot::state* s);
00102 
00106     void merge_state(const spot::state* s1,
00107                      const spot::state* s2);
00108 
00112     void merge_state_delayed(const spot::state* s1,
00113                              const spot::state* s2);
00114 
00117     void delete_scc();
00118 
00136     // bool is_alpha_ball(const spot::state* s,
00137     // bdd label = bddfalse,
00138     // int n = -1);
00139 
00140     // Return true if we can't reach a state with
00141     // an other value of scc.
00142     bool is_terminal(const spot::state* s,
00143                      int n = -1);
00144 
00145     // Return false if the scc contains all the acceptance conditions.
00146     bool is_not_accepting(const spot::state* s,
00147                           int n = -1);
00148 
00151     void remove_acc(const spot::state* s);
00152 
00154     void remove_scc(spot::state* s);
00155 
00157     // void remove_scc_depth_first(spot::state* s, int n = -1);
00158 
00160     void remove_component(const spot::state* from);
00161 
00162     int nb_set_acc_cond() const;
00163 
00164   };
00165 }
00166 
00167 #endif // SPOT_TGBA_TGBAREDUC_HH

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