src/SATSolver.cpp

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/* dlvhex -- Answer-Set Programming with external interfaces.
 * Copyright (C) 2005-2007 Roman Schindlauer
 * Copyright (C) 2006-2015 Thomas Krennwallner
 * Copyright (C) 2009-2016 Peter Schüller
 * Copyright (C) 2011-2016 Christoph Redl
 * Copyright (C) 2015-2016 Tobias Kaminski
 * Copyright (C) 2015-2016 Antonius Weinzierl
 *
 * This file is part of dlvhex.
 *
 * dlvhex is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * dlvhex is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with dlvhex; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 */

#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif

#include "dlvhex2/SATSolver.h"
#include "dlvhex2/CDNLSolver.h"
#include "dlvhex2/ClaspSolver.h"
#include "dlvhex2/ProgramCtx.h"

DLVHEX_NAMESPACE_BEGIN

SATSolverPtr SATSolver::getInstance(ProgramCtx& ctx, NogoodSet& ns, InterpretationConstPtr frozen)
{

    switch (ctx.config.getOption("GenuineSolver")) {
        case 3: case 4:          // internal grounder or Gringo + clasp
        #ifdef HAVE_LIBCLASP
            {
                DBGLOG(DBG, "Instantiating genuine sat solver with clasp");
                SATSolverPtr ptr = SATSolverPtr(new ClaspSolver(ctx, ns, frozen));
                return ptr;
            }
        #else
            throw GeneralError("No support for clasp compiled into this binary");
        #endif                   // HAVE_LIBCLINGO
            break;
        case 1: case 2:          // internal grounder or Gringo + internal solver
        default:                 // translation solver
        {
            DBGLOG(DBG, "Instantiating genuine sat solver with internal solver");
                                 // this solver does not implement optimizations, thus all variables are always frozen
            SATSolverPtr ptr = SATSolverPtr(new CDNLSolver(ctx, ns));
            return ptr;
        }
        break;
    }
}


DLVHEX_NAMESPACE_END

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