3c17c418a2
* src/tgbaalgos/isweakscc.cc, src/tgbaalgos/isweakscc.hh: Speedup when all transitions are accepting.
49 lines
1.7 KiB
C++
49 lines
1.7 KiB
C++
// Copyright (C) 2012 Laboratoire de Recherche et Developpement de
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// l'Epita (LRDE).
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//
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// This file is part of Spot, a model checking library.
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//
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// Spot is free software; you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// Spot is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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// License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Spot; see the file COPYING. If not, write to the Free
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// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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// 02111-1307, USA.
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#ifndef SPOT_TGBAALGOS_ISWEAKSCC_HH
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# define SPOT_TGBAALGOS_ISWEAKSCC_HH
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#include "scc.hh"
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namespace spot
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{
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/// \addtogroup tgba_misc
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/// @{
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/// \brief Whether the SCC number \a scc in \a map is weak.
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///
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/// An SCC is weak if either its cycles are all accepting, or they
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/// are all non-accepting.
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///
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/// The scc_map \a map should have been built already. The absence
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/// of accepting cycle is easy to check (the scc_map can tell
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/// whether the SCC is non-accepting already). Similarly, an SCC in
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/// which all transitions belong to all acceptance sets is
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/// necessarily weak.
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/// For other accepting SCCs, this function enumerates all cycles in
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/// the given SCC (it stops if it find a non-accepting cycle).
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bool is_weak_scc(scc_map& map, unsigned scc);
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/// @}
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}
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#endif // SPOT_TGBAALGOS_ISWEAKSCC_HH
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