spot  0.9.1
state.hh
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00001 // Copyright (C) 2009, 2011 Laboratoire de Recherche et Développement
00002 // de l'Epita (LRDE).
00003 // Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6
00004 // (LIP6), département Systèmes Répartis Coopératifs (SRC), Université
00005 // 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_STATE_HH
00025 # define SPOT_TGBA_STATE_HH
00026 
00027 #include <cstddef>
00028 #include <bdd.h>
00029 #include <cassert>
00030 #include <functional>
00031 #include <boost/shared_ptr.hpp>
00032 #include "misc/casts.hh"
00033 
00034 namespace spot
00035 {
00036 
00039   class state
00040   {
00041   public:
00052     virtual int compare(const state* other) const = 0;
00053 
00073     virtual size_t hash() const = 0;
00074 
00076     virtual state* clone() const = 0;
00077 
00087     virtual void destroy() const
00088     {
00089       delete this;
00090     }
00091 
00092   protected:
00097     virtual ~state()
00098     {
00099     }
00100   };
00101 
00114   struct state_ptr_less_than:
00115     public std::binary_function<const state*, const state*, bool>
00116   {
00117     bool
00118     operator()(const state* left, const state* right) const
00119     {
00120       assert(left);
00121       return left->compare(right) < 0;
00122     }
00123   };
00124 
00138   struct state_ptr_equal:
00139     public std::binary_function<const state*, const state*, bool>
00140   {
00141     bool
00142     operator()(const state* left, const state* right) const
00143     {
00144       assert(left);
00145       return 0 == left->compare(right);
00146     }
00147   };
00148 
00163   struct state_ptr_hash:
00164     public std::unary_function<const state*, size_t>
00165   {
00166     size_t
00167     operator()(const state* that) const
00168     {
00169       assert(that);
00170       return that->hash();
00171     }
00172   };
00173 
00174   // Functions related to shared_ptr.
00176 
00177   typedef boost::shared_ptr<const state> shared_state;
00178 
00179   inline void shared_state_deleter(state* s) { s->destroy(); }
00180 
00194   struct state_shared_ptr_less_than:
00195     public std::binary_function<shared_state,
00196                                 shared_state, bool>
00197   {
00198     bool
00199     operator()(shared_state left,
00200                shared_state right) const
00201     {
00202       assert(left);
00203       return left->compare(right.get()) < 0;
00204     }
00205   };
00206 
00222   struct state_shared_ptr_equal:
00223     public std::binary_function<shared_state,
00224                                 shared_state, bool>
00225   {
00226     bool
00227     operator()(shared_state left,
00228                shared_state right) const
00229     {
00230       assert(left);
00231       return 0 == left->compare(right.get());
00232     }
00233   };
00234 
00251   struct state_shared_ptr_hash:
00252     public std::unary_function<shared_state, size_t>
00253   {
00254     size_t
00255     operator()(shared_state that) const
00256     {
00257       assert(that);
00258       return that->hash();
00259     }
00260   };
00261 
00262 }
00263 
00264 #endif // SPOT_TGBA_STATE_HH

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