include/vrvControl/DtVrlinkDataInterMarshaller.h

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/*******************************************************************************
** Copyright (c) 2010 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/


#pragma once

#include <vrvControl/vrvControlToolkitDataTypes.h>

#include <vlutil/vlPrint.h>
#include <vl/datumRecSet.h>

namespace vrvControlToolkit
{

template<class DataMsg>
class DtVrlinkDataInterMarshaller
{
public: 
   DtVrlinkDataInterMarshaller();
   virtual ~DtVrlinkDataInterMarshaller();

   virtual void encode(DtVrvControl_v1* cmd, DataMsg* msg);
   
   virtual DtVrvControl_v1* decode(const DataMsg* msg);

protected:

};



template<class DataMsg>
DtVrlinkDataInterMarshaller<DataMsg>::DtVrlinkDataInterMarshaller()
{

}

template<class DataMsg>
DtVrlinkDataInterMarshaller<DataMsg>::~DtVrlinkDataInterMarshaller()
{

}

template<class DataMsg>
void DtVrlinkDataInterMarshaller<DataMsg>::encode(DtVrvControl_v1* cmd, DataMsg* msg)
{
   DtDatumRetCode ret;

   //setup the var field
   msg->setNumVarFields(1);

   //odd that these start their indexes at 1
   msg->setDatumParam(DtVar, 1, (DtDatumParam)DtVrvControlDatumParamId);
   msg->setVarDataBytes(1, cmd->mySize, &ret);
   msg->setDatumValByteArray(DtVar, 1, (char*)cmd, &ret);
}

template<class DataMsg>
DtVrvControl_v1* DtVrlinkDataInterMarshaller<DataMsg>::decode(const DataMsg* msg)
{
   DtDatumRetCode ret;
   DtDatumRecordType type;
   int index;
   int size;

   msg->getIndex((DtDatumParam)DtVrvControlDatumParamId, &type, &index, &ret);
   if(ret!=DtDatumValid)
   {
      return NULL;
   }
   
   //actually get the data out of the pdu/interaction
   size=msg->datumSizeBytes(type, index);
   const char* buffer=msg->datumValByteArray(type, index);

   //create some memory
   char* cmdBuffer=new char[size];

   //copy message to buffer;
   memcpy(cmdBuffer, buffer, size);

   //cast a control structure
   DtVrvControl_v1* cmd=(DtVrvControl_v1*)cmdBuffer;

   //check magic number for endiness
   if(cmd->myMagicNumber!=DtVrvMagicNumber)
   {
      delete [] cmdBuffer;
      return NULL;
   }

   return cmd;
}

} //vrvControlToolkit::