00001 // Copyright (C) 2004, 2005 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_GTEC_SCCSTACK_HH 00023 # define SPOT_TGBAALGOS_GTEC_SCCSTACK_HH 00024 00025 #include <bdd.h> 00026 #include <list> 00027 #include <tgba/state.hh> 00028 00029 namespace spot 00030 { 00031 // A stack of Strongly-Connected Components, as needed by the 00032 // Tarjan-Couvreur algorithm. 00033 class scc_stack 00034 { 00035 public: 00036 struct connected_component 00037 { 00038 public: 00039 connected_component(int index = -1); 00040 00042 int index; 00045 bdd condition; 00046 00047 std::list<const state*> rem; 00048 }; 00049 00051 void push(int index); 00052 00054 connected_component& top(); 00055 00057 const connected_component& top() const; 00058 00060 void pop(); 00061 00063 size_t size() const; 00064 00066 std::list<const state*>& rem(); 00067 00071 unsigned clear_rem(); 00072 00074 bool empty() const; 00075 00076 typedef std::list<connected_component> stack_type; 00077 stack_type s; 00078 }; 00079 } 00080 00081 #endif // SPOT_TGBAALGOS_GTEC_SCCSTACK_HH