9c98975c19
* src/misc/satsolver.hh, src/misc/satsolver.cc: Present the SAT solver as an object with a stream interface, to prepare for a better implementation. * src/tgbaalgos/dtbasat.cc, src/tgbaalgos/dtgbasat.cc: Adjust to the new interface, removing all the handling of temporary files. * src/tgbatest/readsat.cc: Adjust.
103 lines
2.4 KiB
C++
103 lines
2.4 KiB
C++
// -*- coding: utf-8 -*-
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// Copyright (C) 2013 Laboratoire de Recherche et Développement
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// de l'Epita.
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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 3 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 this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef SPOT_MISC_SATSOLVER_HH
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#define SPOT_MISC_SATSOLVER_HH
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#include "common.hh"
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#include "tmpfile.hh"
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#include <vector>
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#include <stdexcept>
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#include <iosfwd>
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namespace spot
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{
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class printable;
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class clause_counter
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{
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private:
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int count_;
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public:
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clause_counter()
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: count_(0)
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{
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}
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void check() const
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{
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if (count_ < 0)
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throw std::runtime_error("too many SAT clauses (more than INT_MAX)");
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}
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clause_counter& operator++()
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{
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++count_;
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check();
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return *this;
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}
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clause_counter& operator+=(int n)
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{
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count_ += n;
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check();
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return *this;
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}
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int nb_clauses() const
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{
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return count_;
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}
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};
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/// \brief Interface with a SAT solver.
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///
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/// Call start() to create some temporary file, then send DIMACs
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/// text to the stream returned by operator(), and finally call
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/// get_solution().
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///
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/// The satsolver called can be configured via the
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/// <code>SPOT_SATSOLVER</code> environment variable. It
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/// defaults to
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/// "satsolver -verb=0 %I >%O"
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/// where %I and %O are replaced by input and output files.
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class SPOT_API satsolver
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{
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public:
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satsolver();
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~satsolver();
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void start();
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std::ostream& operator()();
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typedef std::vector<int> solution;
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typedef std::pair<int, solution> solution_pair;
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solution_pair get_solution();
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private:
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temporary_file* cnf_tmp_;
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std::ostream* cnf_stream_;
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};
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/// \brief Extract the solution of a SAT solver output.
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SPOT_API satsolver::solution
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satsolver_get_solution(const char* filename);
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}
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#endif // SPOT_MISC_SATSOLVER_HH
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