include/dlvhex2/DLVProcess.h

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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.
 */

#if !defined(_DLVHEX_DLVPROCESS_H)
#define _DLVHEX_DLVPROCESS_H

#include "dlvhex2/Process.h"
#include "dlvhex2/ProcessBuf.h"

#include "dlvhex2/PlatformDefinitions.h"

#include <iosfwd>
#include <vector>
#include <string>
#include <cassert>

DLVHEX_NAMESPACE_BEGIN

class DLVHEX_EXPORT DLVProcess : public Process
{
    protected:
        //** \brief Communication buffer. */
        ProcessBuf proc;


        std::istream* ipipe;
        std::ostream* opipe;

        std::string executable;

        std::vector<std::string> argv;

        void
            setupStreams();

    public:
        DLVProcess();

        virtual
            ~DLVProcess();

        virtual void
            addOption(const std::string&);

        virtual void
            setPath(const std::string&);

        virtual std::string
            path() const;

        virtual std::vector<std::string>
            commandline() const;

        virtual void
            spawn();

        virtual void
            spawn(const std::vector<std::string>&);

        virtual void
            endoffile();

        // wait for end of process
        // if kill is true, kill if not already ended
        virtual int
            close(bool kill=false);

        virtual std::ostream&
            getOutput();

        virtual std::istream&
            getInput();
};

DLVHEX_NAMESPACE_END
#endif                           // _DLVHEX_DLVPROCESS_H


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