/*
* Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies). 
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "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: 
*    Implementation for the CDosExtensionBase class
*
*/


#include "dosextensionbase.h"
#include "dosclientserver.h"
#include "dosserver.h"
#include "dos_debug.h"
#include <e32svr.h>

//
// ---------------------------------------------------------
// CDosExtensionBase::ExecuteMessageL
// ---------------------------------------------------------
//  

EXPORT_C TInt CDosExtensionBase::ExecuteMessageL(const RMessage2& aMessage)
{
    
    API_TRACE_( "[DOSSERVER] CDosExtensionBase::ExecuteMessageL(...)" );
	__ASSERT_DEBUG(aMessage.Function() == ECallFunction, 
		PanicClient(aMessage,EPanicIllegalFunction));

	TInt retVal(KErrNone);
	TBool parameterModifiedByDSY(EFalse);

	// Get data from RMessage
	TExtensionParPckg extPars;
	aMessage.ReadL(0, extPars);
	
	TInt dataLength(extPars().iParLength);
	if (dataLength >= 0)
	{
		HBufC8* dataBuffer = HBufC8::NewMaxLC( dataLength );
		TPtr8 dataPtr = dataBuffer->Des();
		aMessage.ReadL( 1, dataPtr );

		// Check autocomplete flag
		TUint autoCompl(aMessage.Int2());
		if (autoCompl == KAutoComplete)
		{
            COM_TRACE_4( "[DOSSERVER] MDosExtensionBaseDSY::CallFunctionL(0x%x,0x%x,0x%x,0x%x)"
                ,extPars().iFunc
                ,dataPtr.Ptr()
                ,dataPtr.Length()
                ,autoCompl );

			retVal = CallFunctionL(extPars().iFunc, const_cast<TUint8*>(dataPtr.Ptr()), dataPtr.Length(), parameterModifiedByDSY);

			if((retVal == KErrNone) && parameterModifiedByDSY)
			{
				// Write over client's parameters
				retVal = aMessage.Write(1, dataPtr);
			}
		}
		else
		{
			COM_TRACE_3( "[DOSSERVER] MDosExtensionBaseDSY::CallFunctionAndCompleteL(0x%x,0x%x,0x%x)"
                ,extPars().iFunc
                ,dataPtr.Ptr()
                ,dataPtr.Length() );
        
            CallFunctionAndCompleteL(extPars().iFunc, const_cast<TUint8*>(dataPtr.Ptr()), dataPtr.Length(), aMessage);
		}

		CleanupStack::PopAndDestroy(); // dataBuffer
	}
	else
	{
		// Client passed negative parameter length
		retVal = KErrGeneral;
	}

	return retVal;
}

//
// ---------------------------------------------------------
// CDosExtensionBase::CompleteRequest
// ---------------------------------------------------------
//  

EXPORT_C void CDosExtensionBase::CompleteRequest(const RMessage2& aMessage, TInt aError, TAny* aPar, TInt aParLength, TBool aParameterModified) const
{
	// Write over client's parameters
	if ((aError == KErrNone) && aParameterModified)
	{
		TPtrC8 ptr(static_cast<TUint8*>(aPar), aParLength);
		aError = aMessage.Write(1, ptr);
	}

	RequestComplete(aMessage, aError);
}