lgrEntityTrackingFormat.h

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/******************************************************************************
** Copyright (c) 1992-2010 VT MAK
** All rights reserved.
******************************************************************************/


#ifndef lgrEntityTrackingFormat_H_
#define lgrEntityTrackingFormat_H_

#include "lgrLegacyCheckpointedFormat.h"
#include <vlutil/vlNetTypes.h>

namespace MAKLogger
{
   class DtLgrEntityTracker;

   class DT_DLL_LGRCORE DtLgrEntityTrackingFormat : public DtLgrLegacyCheckpointedFormat
   {
   protected:
      DtLgrEntityTrackingFormat(DtLoggerFile*);
   public:
      virtual ~DtLgrEntityTrackingFormat();

   private:
      DtLgrEntityTrackingFormat(const DtLgrEntityTrackingFormat&);
      DtLgrEntityTrackingFormat& operator=(const DtLgrEntityTrackingFormat&);
   public:

      virtual void copyMetaData(const DtLgrFileFormatter* formatter);

      virtual void writePacket(const DtPacket& packet);

      virtual size_t writePacket(const DtPacket& packet,void* memory,size_t memorySize,
         int fileWriteBufferOffset = -1);

      virtual DtLgrEntityTracker* entityTracker() const = 0;

      virtual size_t headerSize() const;

   protected:

      virtual DtLgrEntityTracker* entityTracker() = 0;

      struct NetPacketHeader
      {
         DtNetU32 entityId;
         DtNetU32 numBytes;
         DtNetU32 flags;
         DtNetFloat64 arrivalTime;
      };

   protected:

      virtual double currentPacketTime();

      virtual int currentPacketType();

      virtual size_t currentPacketSize();

      virtual size_t currentPacketDataSize();

      virtual void fillHeader(void* header, const DtPacket& packet);

      virtual void writeHeader(int fd, const DtPacket& packet);

      virtual DtNetU32 headerEntityId(void* header);

      virtual DtNetU32 headerNumBytes(void* header);

      virtual DtNetU32 headerFlags(void* header);

      virtual DtNetFloat64 headerArrivalTime(void* header);

      virtual char* readPacketIntoBuffer(char* cur, char* end,
         DtMessageBuffer& messages, DtMemoryBufferSP& buffer);

      virtual void readConfigMetaData();

      virtual void writeConfigMetaData();

      virtual void readDateTimeMetaData();

      virtual void writeDateTimeMetaData();

      virtual void readEntityTableMetaData();

      virtual void writeEntityTableMetaData();

   protected:
      
      DtFilePosition myConfigDataPosition;
      DtFilePosition myDateTimeDataPosition;
      DtFilePosition myEntityTablePosition;
   };
}

#endif