module-namespace.cc

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/* $Header: /var/cvs/mbdyn/mbdyn/mbdyn-1.0/modules/module-namespace/module-namespace.cc,v 1.9 2017/01/12 14:55:38 masarati Exp $ */
/* 
 * MBDyn (C) is a multibody analysis code. 
 * http://www.mbdyn.org
 *
 * Copyright (C) 1996-2017
 *
 * 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
 */

#include "mbconfig.h"           /* This goes first in every *.c,*.cc file */

#include "mathp.h"
#include "parser.h"
#include "dataman.h"

class TableNameSpace: public MathParser::NameSpace {
protected:
        Table *m_pTable;

public:
        TableNameSpace(const std::string& sName);
        ~TableNameSpace(void);

        bool IsFunc(const std::string& fname) const;
        MathParser::MathFunc_t* GetFunc(const std::string& fname) const;
        TypedValue EvalFunc(MathParser::MathFunc_t *f) const;
        virtual Table* GetTable(void);
};

TableNameSpace::TableNameSpace(const std::string& sName)
: MathParser::NameSpace(sName)
{
        m_pTable = new Table(false);
}

TableNameSpace::~TableNameSpace(void)
{
        delete m_pTable;
}

bool
TableNameSpace::IsFunc(const std::string& fname) const
{
        return false;
}

MathParser::MathFunc_t*
TableNameSpace::GetFunc(const std::string& fname) const
{
        return 0;
}

TypedValue 
TableNameSpace::EvalFunc(MathParser::MathFunc_t *f) const
{
        throw ErrGeneric(MBDYN_EXCEPT_ARGS);
}

Table*
TableNameSpace::GetTable(void)
{
        return m_pTable;
}

struct NameSpaceDR : public DescRead {
        bool Read(HighParser& HP);
};

bool
NameSpaceDR::Read(HighParser& HP)
{
        if (!HP.IsArg()) {
                silent_cerr("Parser error in NameSpaceDR::Read(), "
                        " arg expected at line "
                        << HP.GetLineData() << std::endl);
                throw HighParser::ErrColonExpected(MBDYN_EXCEPT_ARGS);
        }

        const char *sName = HP.GetString();
        if (!HP.GetMathParser().bNameValidate(sName)) {
                silent_cerr("Parser error in NameSpaceDR::Read(), "
                        " invalid namespace \"" << sName << "\" at line "
                        << HP.GetLineData() << std::endl);
                throw ErrGeneric(MBDYN_EXCEPT_ARGS);
        }
        
        MathParser::NameSpace *pNS = new TableNameSpace(sName);
        int rc = HP.GetMathParser().RegisterNameSpace(pNS);
        if (rc != 0) {
                delete pNS;
        }

        return (rc == 0);
}

extern "C" int
module_init(const char *module_name, void *pdm, void *php)
{
        MBDynParser& HP = *((MBDynParser *)php);

        NameSpaceDR *pDR = new NameSpaceDR;
        if (pDR == 0) {
                return false;
        }
        SetDescData("namespace", pDR);

        int rc = 0;
        while (HP.IsArg()) {
                const char *sName = HP.GetString();

                if (!HP.GetMathParser().bNameValidate(sName)) {
                        silent_cerr("Parser error in module-namespace::module_init(), "
                                " invalid namespace \"" << sName << "\" at line "
                                << HP.GetLineData() << std::endl);
                        throw ErrGeneric(MBDYN_EXCEPT_ARGS);
                }
        
                /* registers namespace */
                MathParser::NameSpace *pNS = new TableNameSpace(sName);
                rc = HP.GetMathParser().RegisterNameSpace(pNS);
                if (rc != 0) {
                        delete pNS;
                }
        }

        return rc;
}