// Copyright (c) 1999-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members

// which accompanies this distribution, and is available

// at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// EZLib: ZSTREAM.H

// Declaration for CEZStream class.  

// 

//

#ifndef __EZZSTREAM_H__

#define __EZZSTREAM_H__

#include <e32base.h>

#include <ezlib.h>

#include <ezliberrorcodes.h>

/**

Represents a zip stream

@publishedAll

@released

*/

class CEZZStream : public CBase

	{

public:

/** stream panic values */

	enum 

		{

		EStreamError = -Z_STREAM_ERROR,

		EDataError = -Z_DATA_ERROR,

		EBufError = -Z_BUF_ERROR,

		EVersionError = -Z_VERSION_ERROR,

		EUnexpected

		};

public:

	IMPORT_C void SetInput(const TDesC8& aInputData);

	IMPORT_C void SetOutput(TDes8& aOutputData);

	IMPORT_C TPtrC8 OutputDescriptor() const;

	IMPORT_C TInt TotalOut() const;

	IMPORT_C TInt TotalIn() const;

	IMPORT_C TInt32 Adler32() const;

	IMPORT_C TInt AvailIn() const;

	IMPORT_C TInt AvailOut() const;

	IMPORT_C TInt Progress(TInt aTotalLength) const;

protected:

	CEZZStream();

protected:

	z_stream iStream;

	// This pointer is reset every time SetOutput is called.  It maintains a pointer to the

	// start of the output buffer which is being written to.  We cannot use iStream.next_out,

	// because zlib will modifify this during its deflate and inflate.

	TUint8* iOutputPointer;

	TInt iOutputBufferLength;

	};

#endif