/*

* Copyright (c) 2010 Ixonos Plc.

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - Initial contribution

*

* Contributors:

* Ixonos Plc

*

* Description:  

*

*/

#ifndef __CEXIFPARSER_H__

#define __CEXIFPARSER_H__

#include <e32base.h>

class TExifEntry

	{

	public:

		inline TExifEntry()

			{

			iIfd = 0;

			iTag = 0;

			iType = 0;

			iCount = 0;

			iData = NULL;

			}

		inline ~TExifEntry()

			{

			delete iData;

			}

	public:

		TUint8 iIfd;

		TUint16 iTag;

		TUint8 iType;

		TUint32 iCount;

		TUint8* iData;

	};

class TParseStack

	{

	public:

		inline TParseStack( TUint32 aPosition, TUint8 aIfd )

			: iPosition( aPosition )

			, iIfd( aIfd )

			{

			}

	public:

		TUint32 iPosition;

		TUint8 iIfd;

	};

class CExifParser

	: public CBase

	{

	public:

		enum EIfd

			{

			EIfd0 = 0,

			EIfd1,

			ESubIfd,

			EInteroperability

			};

	public:

		static CExifParser* NewL();

		static CExifParser* NewLC();

		~CExifParser();

	private:

		CExifParser();

		void ConstructL();

	public:

		void ParseL( const TPtrC8& aData );

		TBool TagExist( TInt aIfd, TUint16 aTag );

		void DeleteTag( TInt aIfd, TUint16 aTag );

		TUint32 TagValue( TInt aIfd, TUint16 aTag );

		void AddTagL( TInt aIfd, TUint16 aTag, TInt32 aValue );

		void AddTagL( TInt aIfd, TUint16 aTag, TUint32 aValue );

		void AddTagL( TInt aIfd, TUint16 aTag, TUint16 aValue );

		void AddTagL( TInt aIfd, TUint16 aTag, TUint8 aValue );

		void AddTagL( TInt aIfd, TUint16 aTag, TPtrC8 aData );

		void AddTagL( TInt aIfd, TUint16 aTag, const TUint8* aValue );

		void AddTagL( TInt aIfd, TUint16 aTag, TUint32 aNominator, TUint32 aDenominator );

		TPtrC8 ThumbData();

		TPtr8 SaveL( const TPtrC8& aThumbData );

	private: // new methods

		TUint32 Get8();

		TUint32 Get16();

		TUint32 Get32();

		TUint32 Get8( const TUint8* aData );

		TUint32 Get16( const TUint8* aData );

		TUint32 Get32( const TUint8* aData );

		void ParseIfdL( TUint8 aIfd );

		TInt FindTag( TInt aIfd, TUint16 aTag );

		void StoreEntry( TInt aIndex );

		void Put8( TUint8 aData );

		void Put16( TUint16 aData );

		void Put32( TUint32 aData );

		TUint32 StoreData( TUint8* aData, TInt aCount );

		TInt IfdCount( TInt aType );

		void AddTagL( TInt aIfd, TUint16 aTag, TInt aType, TUint8* aData, TInt aDataLen );

	private:

		TPtrC8	iData;

		TInt	iPosition;

		TBool	iIntelByteOrder;

		RArray< TParseStack >iParseStack;

		RPointerArray< TExifEntry >iEntry;

		TUint8*	iSaveBuf;				// used to store tags

		TInt	iSaveBufPos;

		TUint8*	iSaveDataBuf;			// used to store tag data

		TInt	iSaveDataBufPos;

		RArray< TUint32 >iDataEntry;	// list of tag data pointers

		TUint8*	iThumbData;

		TInt	iThumbLen;

	};

#endif