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xmlvaluable.cpp

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//============================================================================= 
//
// XDFLengine library
//
//-----------------------------------------------------------------------------
//  XMLVALUABLE.CPP
//-----------------------------------------------------------------------------
//_____________________________________________________________________________
//
//  Copyright (C) 2003 Guillaume Baurand. All Rights Reserved.
//
//  This file is part of the XDFLengine project.
//
//  The XDFLengine 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; either version 2 of the License, or
//  (at your option) any later version.
//
//  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.
//
//  For more information, 
//      contact  : guillaume@baurand.net 
//      or visit : http://xdflengine.sourceforge.net
//
//============================================================================= 

#   include "xmlvaluable.hpp"
#   include "valuers/xmlvaluer.hpp"

BEGIN_XDFLENGINE_NS

//=============================================================================
//  CLASS XMLVALUABLE
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    //_________________________________________________________________________
    //  XMLVALUABLE
    //-------------------------------------------------------------------------
    XMLValuable::XMLValuable()
    {
        DEBUG_CREATE(XMLValuable)
    }

    //_________________________________________________________________________
    //  ~XMLVALUABLE
    //-------------------------------------------------------------------------
    XMLValuable::~XMLValuable()
    {
        DEBUG_DEL(XMLValuable)

        // Empty valuers map;
        while( !m_vaValuers.empty() )(delete m_vaValuers.pop());

    }

    //_________________________________________________________________________
    //  CALCULATEVALUE
    //-------------------------------------------------------------------------
    char* XMLValuable::calculateValue( const char* p_pszValue)
    {
        char*       l_pszBefore = 0;
        char*       l_pszPrefix = 0;
        char*       l_pszExpr = 0;
        char*       l_pszAfter = 0;
        char*       l_pszValue = 0;
        char*       l_pszRet = 0;
        char*       l_pszTmp = 0;
        XMLValuer*  l_pXMLValuer;

        
        DEBUG_FUNC(XMLValuable::calculateValue)

        l_pszTmp = copyCharBuffer( p_pszValue);
        l_pszBefore = l_pszTmp;
        l_pszAfter = l_pszTmp;
        l_pszRet=copyCharBuffer("");

        while(true)
        {
            // separate parts of the expression
            
            // find a prefix
            l_pszPrefix = strstr(l_pszBefore, XMLVALUER_DELIM);
            if( ! l_pszPrefix) break;
            l_pszPrefix[0]='\0';
            l_pszPrefix+= strlen( XMLVALUER_DELIM); 
            
            // find expression
            l_pszExpr = strstr(l_pszPrefix, XMLVALUER_SEP);
            if( ! l_pszExpr) break;
            l_pszExpr[0]='\0';
            l_pszExpr+= strlen( XMLVALUER_SEP);

            // find end 
            l_pszAfter = strstr(l_pszExpr, XMLVALUER_DELIM);
            if( ! l_pszAfter) break;
            l_pszAfter[0]='\0';
            l_pszAfter+= strlen( XMLVALUER_DELIM);  
            

            l_pXMLValuer = getValuer( l_pszPrefix);
            
            l_pszValue = 0;
            if( l_pXMLValuer)
            {   
                l_pszValue = l_pXMLValuer->calculateExpression( l_pszExpr);             
            }

            if( !l_pszValue)
            {
                l_pszValue = copyCharBuffer("");
                l_pszValue = concatCharBuffer( l_pszValue,XMLVALUER_DELIM);
                l_pszValue = concatCharBuffer( l_pszValue,l_pszPrefix);
                l_pszValue = concatCharBuffer( l_pszValue,XMLVALUER_SEP);
                l_pszValue = concatCharBuffer( l_pszValue,l_pszExpr);
                l_pszValue = concatCharBuffer( l_pszValue,XMLVALUER_DELIM);
            }

            l_pszRet = concatCharBuffer(l_pszRet, l_pszBefore);             
            l_pszRet = concatCharBuffer(l_pszRet, l_pszValue);
            l_pszValue = releaseCharBuffer( l_pszValue);
            l_pszBefore = l_pszAfter;

        }

        l_pszRet = concatCharBuffer(l_pszRet, l_pszAfter);
        //logout << "\n[[" << l_pszRet << "]]";

        l_pszTmp = releaseCharBuffer( l_pszTmp);
        
        return l_pszRet;
    }

    //_________________________________________________________________________
    //  ADDVALUER
    //-------------------------------------------------------------------------
    void XMLValuable::addValuer ( XMLValuer* p_pXV_valuer, const char* p_pszName)
    {
        DEBUG_FUNC(XMLValuable::addValuer)
        m_vaValuers.add( p_pXV_valuer, p_pszName);
    }

    //_________________________________________________________________________
    //  GETVALUER
    //-------------------------------------------------------------------------
    XMLValuer* XMLValuable::getValuer(const char* p_pszName) const
    {
        DEBUG_FUNC(XMLValuable::getValuer)
        return m_vaValuers.get( p_pszName);
    }

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//=============================================================================

END_XDFLENGINE_NS

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