/*

* 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:  UNICODE conversion

*

*/

#include <utf.h>

#include <nsmlunicodeconverter.h>

#include "nsmlcliagconstants.h"

// ---------------------------------------------------------

// NSmlUnicodeConverter::HBufC8InUTF8LC()

// Converts Unicode data to UTF-8

// No size limitations, this function re-allocates memory

// when needed. Note that a pointer given as a parameter is updated.

// ---------------------------------------------------------

EXPORT_C TInt NSmlUnicodeConverter::HBufC8InUTF8LC( const TDesC& aUnicodeData, HBufC8*& aUTF8Data )

	{

	TPtr8 outputBuffer = HBufC8::NewLC( KNSmlConvBufferSize )->Des(); 

	TPtrC16 remainderOfUnicodeText( aUnicodeData );

	TInt convertedDataLength( 0 );

	HBufC8* convertedData = HBufC8::NewL( aUnicodeData.Length() );

	HBufC8* oldPointer = NULL;

	TInt returnValue( 0 );

	TInt pushed( 0 );

	do

		{

		returnValue = CnvUtfConverter::ConvertFromUnicodeToUtf8( outputBuffer, remainderOfUnicodeText );

		if ( returnValue==CnvUtfConverter::EErrorIllFormedInput )

			{

			delete convertedData;

            User::Leave( KErrCorrupt );

			}

        else if ( returnValue < 0 ) 

			{

            delete convertedData;

			User::Leave( KErrGeneral );

			}

		if ( outputBuffer.Size() > 0 )

			{

			convertedDataLength += outputBuffer.Length();

			if ( convertedDataLength > convertedData->Des().MaxLength() )

				{

				oldPointer = convertedData;

				convertedData = convertedData->ReAlloc( convertedDataLength );

				if ( convertedData == NULL )

					{

					delete oldPointer;

					User::Leave( KErrNoMemory );

					}

				}

			convertedData->Des().Append( outputBuffer );

			}

		if ( returnValue > 0 )

			{

			remainderOfUnicodeText.Set( remainderOfUnicodeText.Right( returnValue ) );

			}

		}

		while ( returnValue > 0 ); 

	CleanupStack::PopAndDestroy(); //outputBuffer

	aUTF8Data = convertedData;

	CleanupStack::PushL( aUTF8Data );

	pushed++;

	return pushed;

	}

// ---------------------------------------------------------

// NSmlUnicodeConverter::HBufC16InUnicodeL()

// 

// ---------------------------------------------------------

EXPORT_C TInt NSmlUnicodeConverter::HBufC16InUnicodeL( const TDesC8& aUtf8, HBufC*& aUnicodeData )

	{

	TInt pushed;

	pushed = HBufC16InUnicodeLC( aUtf8, aUnicodeData );

	CleanupStack::Pop();

	return pushed;

	}

// ---------------------------------------------------------

// TNSmlUnicodeConverter::HBufC16InUnicodeLC()

// Converts UTF-8 data to Unicode.

// No size limitations, this function re-allocates memory

// when needed. Note that a pointer given as a parameter is updated.

// ---------------------------------------------------------

EXPORT_C TInt NSmlUnicodeConverter::HBufC16InUnicodeLC( const TDesC8& aUtf8, HBufC*& aUnicodeData )

	{

	TPtr outputBuffer = HBufC::NewLC( KNSmlConvBufferSize )->Des(); 

	TPtrC8 remainderOfUtf8 (aUtf8 );

	TInt convertedDataLength( 0 );

	HBufC16* convertedData = HBufC16::NewL( aUtf8.Length() / 2 );

	HBufC16* oldPointer = NULL;

	TInt returnValue( 0 );

	TInt pushed( 0 );

	do

		{

		returnValue = CnvUtfConverter::ConvertToUnicodeFromUtf8( outputBuffer, remainderOfUtf8 );

		if (returnValue == CnvUtfConverter::EErrorIllFormedInput )

			{

            delete convertedData;

			User::Leave( KErrCorrupt );

			}

		else if ( returnValue < 0 ) // future-proof against "TError" expanding

			{

            delete convertedData;

			User::Leave( KErrGeneral );

			}   

		if ( outputBuffer.Size() > 0 )

			{

			convertedDataLength += outputBuffer.Length();

			if ( convertedDataLength > convertedData->Des().MaxLength() )

				{

				oldPointer = convertedData;

				convertedData = convertedData->ReAlloc( convertedDataLength );

				if ( convertedData == NULL )

					{

					delete oldPointer;

					User::Leave( KErrNoMemory );

					}

				}

			convertedData->Des().Append( outputBuffer );

			}

		if ( returnValue > 0 )

			{

			remainderOfUtf8.Set( remainderOfUtf8.Right( returnValue ) );

			}

		}

	while ( returnValue > 0 );

	CleanupStack::PopAndDestroy(); //outputBuffer

	aUnicodeData = convertedData;

	CleanupStack::PushL( aUnicodeData );

	pushed++;

	return pushed;

	}