instream.h

vncviewer_source_1.0

/* Copyright (C) 2006 Lucas Gomez  All Rights Reserved.
 * 
 * This 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 software 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 software; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
 * USA.
 */

#ifndef __INSTREAM_H__
#define __INSTREAM_H__

// INCLUDES
#include <e32base.h>
#include <e32std.h>

// ENUMERATIONS

// CONSTANTES
const TInt KMaxStringLength=65535;

// CLASS DECLARATION

/**
* InStream application class.
*/
class InStream
{
public: // Constructors and destructor
    /**
    * ~InStream
    * Virtual Destructor.
    */
    virtual ~InStream();

protected:
    /**
    * InStream.
    * C++ default constructor.
    */
    InStream();
    
public:	// class methods
	TInt Check(TInt aItemSize,TInt aNItems);
	
	void Check(TInt iItemSize);
	
	TInt ReadS8();
	
	TInt ReadS16();
	
	TInt ReadS32();

    TInt ReadU8();
    
    TInt ReadU16();
    
    TInt ReadU32();
    
    void ReadString(TDes8& aStr);
    
    void ReadBytes(RBuf8& aData,TInt aOffset,TInt aLength);
    
    void Skip(TInt aBytes);
    
    TInt ReadOpaque8();
    
    TInt ReadOpaque16();
    
    TInt ReadOpaque32();
    
    TInt ReadOpaque24A();
    
    TInt ReadOpaque24B();
    
    virtual TInt Pos()=0;
    
    inline TBool BytesAvailable() {return iEnd!=iPtr;}
    
    inline RBuf8& GetBuf() {return iBuf;}
    
    inline TInt GetPtr() {return iPtr;}
    
    inline TInt GetEnd() {return iEnd;}
    
    inline void SetPtr(TInt aPtr) {iPtr=aPtr;}
    
    virtual TInt Overrun(TInt aItemSize,TInt aNItems)=0;
    
protected:	// member variables
	RBuf8 iBuf;
	TInt iPtr;
	TInt iEnd;
};

#endif // __INSTREAM_H__