ccommbufferbase.h

//=========================================================================
//  CCOMMBUFFERBASE.H - part of
//
//                  OMNeT++/OMNEST
//           Discrete System Simulation in C++
//
//  Author: Andras Varga, 2003
//          Dept. of Electrical and Computer Systems Engineering,
//          Monash University, Melbourne, Australia
//
//=========================================================================

/*--------------------------------------------------------------*
  Copyright (C) 2003-2008 Andras Varga
  Copyright (C) 2006-2008 OpenSim Ltd.

  This file is distributed WITHOUT ANY WARRANTY. See the file
  `license' for details on this and other legal matters.
*--------------------------------------------------------------*/

#ifndef __CCOMMBUFFERBASE_H__
#define __CCOMMBUFFERBASE_H__

#include "ccommbuffer.h"

NAMESPACE_BEGIN

class SIM_API cCommBufferBase : public cCommBuffer
{
  protected:
    char *mBuffer;    // the buffer
    int mBufferSize;  // size of buffer allocated
    int mMsgSize;     // current msg size (incremented by pack() functions)
    int mPosition;    // current position in buffer for unpacking

  protected:
    void extendBufferFor(int dataSize);

  public:
    cCommBufferBase();

    virtual ~cCommBufferBase();

    char *getBuffer() const;

    int getBufferLength() const;

    void allocateAtLeast(int size);

    void setMessageSize(int size);

    int getMessageSize() const;

    void reset();

    virtual bool isBufferEmpty() const;

    virtual void assertBufferEmpty();
};

NAMESPACE_END


#endif