levelparser.h

RGA: Biowaste Game Example This C++ application demonstrates how to create a 2D mobile game for S60

/*
* ==============================================================================
*  Name        : LevelParser.h
*  Part of     : RGA Game Example
*  Interface   :
*  Description : parsing of the level data from text file
*  Version     : 1.0
*
*  Copyright (c) 2007-2008 Nokia Corporation.
*  This material, including documentation and any related
*  computer programs, is protected by copyright controlled by
*  Nokia Corporation.
* ==============================================================================
*/

#ifndef __LEVELPARSER_H__
#define __LEVELPARSER_H__

#include <e32base.h>
#include <f32file.h>

class CLevelParser : public CBase
	{
	public:
		CLevelParser();
		virtual ~CLevelParser();
		
		/**
		 * Init
		 * @param aFilename level file to parse
		 * @return KErrNone or an error code
		 */
		TInt Init(const TDesC& aFilename);
		
		/**
		 * FindNextTag
		 * @param aTag tag to find from file, starting from current location
		 * @return ETrue if tag was found and current position moved to tag data
		 */
		TBool FindNextTag(const TDesC8& aTag);
		
		/**
		 * GetTagData
		 * get raw text from current tag
		 * @param aBuffer buffer that receives tag data
		 * @return KErrNone, KErrUnderflow, KErrNotFound
		 */
		TInt GetTagData(TDes8& aBuffer) const;
		
		/**
		 * GetNextTagInt
		 * get next integer value from current tag
		 * @param aValue
		 * @return ETrue if value was found, EFalse otherwise
		 */
		TBool GetNextTagInt(TInt& aValue);
	
		/**
		 * Position
		 * @return current file position
		 */
		TUint32 Position() const;
		
		/**
		 * SetPosition
		 * @param aPosition new file position
		 */
		void SetPosition(TUint32 aPosition);
		
	private:
		TUint8*		iFileBuffer;
		TUint32		iFileBufferSize;
		
		TUint32		iPosition;
		
		TUint32		iDataPosStart;
		TUint32		iDataPosEnd;
		
		TUint32		iValuePos;
	};

#endif /* __LEVELPARSER_H__ */