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tgbaalgos/magic.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_TGBAALGOS_MAGIC_HH
00023 # define SPOT_TGBAALGOS_MAGIC_HH
00024 
00025 #include "misc/hash.hh"
00026 #include <list>
00027 #include <utility>
00028 #include <ostream>
00029 #include "tgba/tgbatba.hh"
00030 
00031 namespace spot
00032 {
00056   struct magic_search
00057   {
00059     magic_search(const tgba_tba_proxy *a);
00060     ~magic_search();
00061 
00069     bool check();
00070 
00075     std::ostream& print_result(std::ostream& os,
00076                                const tgba* restrict = 0) const;
00077 
00078   private:
00079 
00080     // The names "stack", "h", and "x", are those used in the paper.
00081 
00084     struct magic
00085     {
00086       bool seen_without : 1;
00087       bool seen_with    : 1;
00088     };
00089 
00091     struct magic_state
00092     {
00093       const state* s;
00094       bool m;                   
00095     };
00096 
00097     typedef std::pair<magic_state, tgba_succ_iterator*> state_iter_pair;
00098     typedef std::list<state_iter_pair> stack_type;
00099     stack_type stack;           
00100 
00101     typedef std::list<bdd> tstack_type;
00105     tstack_type tstack;
00106 
00107     typedef Sgi::hash_map<const state*, magic,
00108                           state_ptr_hash, state_ptr_equal> hash_type;
00109     hash_type h;                
00110 
00112     void push(const state* s, bool m);
00114     bool has(const state* s, bool m) const;
00115 
00116     const tgba_tba_proxy* a;    
00117 
00118     const state* x;
00119   };
00120 
00121 
00122 }
00123 
00124 #endif // SPOT_TGBAALGOS_MAGIC_HH

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