extedge.h

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/* $Header: /var/cvs/mbdyn/mbdyn/mbdyn-1.0/mbdyn/base/extedge.h,v 1.20 2017/01/12 14:46:09 masarati Exp $ */
/* 
 * MBDyn (C) is a multibody analysis code. 
 * http://www.mbdyn.org
 *
 * Copyright (C) 2007-2017
 *
 * Pierangelo Masarati  <masarati@aero.polimi.it>
 * Paolo Mantegazza     <mantegazza@aero.polimi.it>
 *
 * Dipartimento di Ingegneria Aerospaziale - Politecnico di Milano
 * via La Masa, 34 - 20156 Milano, Italy
 * http://www.aero.polimi.it
 *
 * Changing this copyright notice is forbidden.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation (version 2 of the License).
 * 
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/* Forza */

#ifndef EXTEDGE_H
#define EXTEDGE_H

#include "extforce.h"

/* ExtFileHandlerEDGE - begin */

class ExtFileHandlerEDGE : public ExtFileHandlerBase {
protected:
        std::string fflagname, fdataname;
        bool bReadForces;

        std::ifstream infile;
        std::ofstream outfile;

        enum EDGEcmd {
                // ?
                EDGE_UNKNOWN            = -1,

                // EDGE is initializing; MBDyn waits
                EDGE_INITIALIZING       = 0,

                // EDGE is busy; MBDyn waits
                EDGE_BUSY               = 1,

                // EDGE waits (is ready to read kinematics); MBDyn iterates
                EDGE_READ_READY         = 2,

                // EDGE is computing; MBDyn waits before reading forces
                EDGE_MBDYN_WRITE_DONE   = 3,

                // EDGE converged; MBDyn advances one step
                EDGE_GOTO_NEXT_STEP     = 4,

                // EDGE wants to end simulation
                EDGE_QUIT               = 5,

                // must be the last one
                EDGE_LAST
        };

        const char *EDGEcmd2str(int cmd) const;

        EDGEcmd CheckFlag(int& cnt);
        void SendFlag(EDGEcmd cmd);

public:
        ExtFileHandlerEDGE(std::string& fflagname, std::string& fdataname,
                mbsleep_t SleepTime, std::streamsize Precision);
        ~ExtFileHandlerEDGE(void);

        virtual bool Prepare_pre(void);
        virtual void Prepare_post(bool ok);

        virtual void AfterPredict(void);

        virtual bool Send_pre(SendWhen when);
        virtual void Send_post(SendWhen when);

        virtual bool Recv_pre(void);
        virtual bool Recv_post(void);

        virtual std::ostream *GetOutStream(void);
        virtual std::istream *GetInStream(void);
};

/* ExtFileHandlerEDGE - end */

extern int
mbedge_goto_eol(std::istream& fin, char *buf, size_t bufsiz);
char *
mbedge_eat_sep(char *buf, size_t& buflen);
char *
mbedge_eat_field(char *buf, size_t& buflen, const char *val);
#if 0
char *
mbedge_eat_field(char *buf, size_t& buflen);
#endif


class DataManager;
class MBDynParser;

extern ExtFileHandlerBase *
ReadExtFileHandlerEDGE(DataManager* pDM,
        MBDynParser& HP, 
        unsigned int uLabel);

#endif // EXTEDGE_H