ScalarFunctions.h

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/* $Header: /var/cvs/mbdyn/mbdyn/mbdyn-1.0/mbdyn/base/ScalarFunctions.h,v 1.23 2017/01/12 14:46:08 masarati Exp $ */
/* 
 * HmFe (C) is a FEM analysis code. 
 *
 * Copyright (C) 1996-2017
 *
 * Marco Morandini  <morandini@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 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.
 *
 */
/*
 * MBDyn (C) is a multibody analysis code. 
 * http://www.mbdyn.org
 *
 * Copyright (C) 1996-2017
 * 
 * This code is a partial merge of HmFe and MBDyn.
 *
 * 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
 */
#ifndef ScalarFunctions_hh
#define ScalarFunctions_hh

#include "ac/f2c.h"

class BasicScalarFunction {
public:
        virtual ~BasicScalarFunction();
        virtual doublereal operator()(const doublereal x) const = 0;
};

class DifferentiableScalarFunction : public BasicScalarFunction {
public:
        virtual ~DifferentiableScalarFunction();
        virtual doublereal operator()(const doublereal x) const = 0;
        virtual doublereal ComputeDiff(const doublereal x, const integer order = 1) const = 0;
};

class MBDynParser;
class DataManager;

// implemented in ScalarFunctionsImpl.cc
extern const BasicScalarFunction *const
ParseScalarFunction(MBDynParser& HP, DataManager* const pDM);

extern void
SetScalarFunctionDriveCallerData(void);

struct ScalarFunctionRead {
        virtual ~ScalarFunctionRead( void ) { NO_OP; };
        virtual const BasicScalarFunction *
        Read(DataManager* const pDM, MBDynParser& HP) const = 0;
};

extern bool
SetSF(const std::string &s, const ScalarFunctionRead *rf);

extern void InitSF(void);
extern void DestroySF(void);

#endif //ScalarFunctions_hh