// Copyright (c) 2008-2009 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 "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:

 //

 // Description:

 // some utility classes for writing data to buffer

 // 

 //

 /**

  @file

  @internalTechnology

 */

 #ifndef __CRASH_LOG_WALKER_H_INCLUDED__

 #define __CRASH_LOG_WALKER_H_INCLUDED__

 #include <e32cmn.h> 

 #include <rm_debug_api.h>

 #include <scmdatatypes.h>

 namespace Debug

 	{

 	/**

 	 * This class provides functionality to walk through a crash log in a data buffer

 	 * ensuring it is valid and getting the information we require back

 	 */

 	class TCrashLogWalker

 		{

 	public:

 		TCrashLogWalker(TDesC8& aBuffer);

 		TInt ReadLogHeader(const TInt aStartPoint);		

 		TInt GetCrashSize() const;

 		TInt GetCrashId() const;

 		const TRmdArmExcInfo& GetCrashContext() const;		

 		const TCrashInfoHeader& GetCrashHeader() const;

 		const TCrashOffsetsHeader& GetOffsetsHeader() const;

 #ifndef __KERNEL_MODE__		

 		MByteStreamSerializable*  GetNextDataTypeL(TInt& aPos, SCMStructId& aId, TInt& aBufferSize);

 		TRawData* GetRawDataTypeL(TInt& aPos, TInt& aBufferSize, TDes8& aRawBuf, TInt aStartRawPosition = 0);

 #endif

 		void UpdateBuffer(TDesC8& aBuffer);

 	private:

 		void HelpAssignRegisterToContext(const TRegisterValue& aRegVal);

 	private:

 		TDesC8& iBuffer;					//buffer containing data for the log we are walking - not all of it, just the bit of interest

 		TCrashInfoHeader iCrashHeader;		//Stores the header of the log we are walking

 		TCrashOffsetsHeader iOffsets;		//Stores the offsets header of the log we are walking

 		TRmdArmExcInfo iContext;			//Stores the register context of the log we are walking

 		TByteStreamReader iReader;

 	private:

 		TInt VerifyHeader();

 		};

 	}

 #endif // __CRASH_LOG_WALKER_H_INCLUDED__