// Copyright (c) 2004-2009 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:

//

/**

 @file

 @internalTechnology

*/

#include <elements/metabuffer.h>

#include <elements/metadata.h>

#ifdef _DEBUG

// Panic category for "absolutely impossible!" vanilla ASSERT()-type panics from this module

// (if it could happen through user error then you should give it an explicit, documented, category + code)

_LIT(KSpecAssert_ElemNetMetaMtBfr, "ElemNetMetaMtBfr");

#endif

using namespace Meta;

TMetaBuf8::TMetaBuf8(const TAny* aData)

	: TMetaVarLen8<RBuf8>(aData)

	{

	}

EXPORT_C MMetaType* TMetaBuf8::NewL(const TAny* aMem, const TAny* aData)

/**

 * Instantiates a meta type for RBuf8.

 * Used for attribure registration (in the data v-table).

 */

    {

    return ::new ((TUint8*)aMem) TMetaBuf8(aData);

    }

EXPORT_C TInt TMetaBuf8::Load(TPtrC8& aBuffer)

	{

	TInt errlen = CheckBuf( aBuffer );

	if (errlen < 0)

		{

		return errlen;

		}

	if ( iData->MaxLength() < errlen )

		{

		iData->Close();

		TInt err = iData->Create(errlen);

		if ( err != KErrNone )

			return err;

		}

	//and copy whatever we can into the client descriptor

	CopyBuf(aBuffer,errlen);

	TInt padByte = errlen % 2;

	aBuffer.Set(aBuffer.Ptr() + errlen + padByte, aBuffer.Length() - errlen - padByte); //update pointer

	return KErrNone;

	}

EXPORT_C TInt TMetaBuf8::Store(TDes8& aBuffer) const

	{

	// Ask the descriptor how much data does it currently store

	TUint32 size = this->iData->Length();

   	// The length variable and the data must fit

	if ((TUint32)(aBuffer.MaxLength() - aBuffer.Length()) < (size + sizeof(TUint32)))

		{

		return KErrOverflow;

		}

    // Store

	aBuffer.Append((TUint8*)&size, sizeof(TUint32));

	AppendToBuf(aBuffer);

	if (size & 1)

		{

		// Pad odd lengths to an even number to avoid potential

		// alignment issues on target

		TUint8 pad(0);

		aBuffer.Append(&pad, 1);

		}

	return KErrNone;

	}

EXPORT_C void TMetaBuf8::Copy(const TAny* aData)

	{

	const RBuf8& var = *((RBuf8*)aData);

	if ( iData->MaxLength() < var.Length() )

		{

		iData->Close();

		TInt err = iData->Create(var.Length());

		if ( err != KErrNone )

			return;

		}

	TMetaVarLen8<RBuf8>::Copy(aData);

	}

EXPORT_C TInt TMetaBuf8::Length() const

	{

	return TMetaVarLen8<RBuf8>::Length();

	}

TMetaBuf16::TMetaBuf16(const TAny* aData)

	: TMetaVarLen16<RBuf16>(aData)

	{

	}	

EXPORT_C MMetaType* TMetaBuf16::NewL(const TAny* aMem, const TAny* aData)

/**

 * Instantiates a meta type for RBuf8.

 * Used for attribure registration (in the data v-table).

 */

    {

    return ::new ((TUint8*)aMem) TMetaBuf16(aData);

    }	

EXPORT_C TInt TMetaBuf16::Load(TPtrC8& aBuffer)

	{

	TInt errlen = CheckBuf( aBuffer );

	if (errlen < 0)

		{

		return errlen;

		}

	// errlen is in bytes we want unicode chars

	__ASSERT_DEBUG((errlen & 1) == 0, User::Panic(KSpecAssert_ElemNetMetaMtBfr, 1));

	if ( iData->MaxLength() < errlen / 2)

		{

		iData->Close();

		TInt err = iData->Create(errlen / 2);

		if ( err != KErrNone )

			return err;

		}

	//and copy whatever we can into the client descriptor

	CopyBuf(aBuffer,errlen);

	aBuffer.Set(aBuffer.Ptr() + errlen, aBuffer.Length() - errlen); //update pointer

	return KErrNone;

	}

EXPORT_C TInt TMetaBuf16::Store(TDes8& aBuffer) const

	{

	return TMetaVarLen16<RBuf16>::Store(aBuffer);

	}

EXPORT_C void TMetaBuf16::Copy(const TAny* aData)

	{

	const RBuf16& var = *((RBuf16*)aData);

	if ( iData->MaxLength() < var.Length() )

		{

		iData->Close();

		TInt err = iData->Create(var.Length());

		if ( err != KErrNone )

			return;

		}

	TMetaVarLen16<RBuf16>::Copy(aData);

	}

EXPORT_C TInt TMetaBuf16::Length() const

	{

	return TMetaVarLen16<RBuf16>::Length();

	}