/*+
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* Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies). +
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* All rights reserved.+
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* This component and the accompanying materials are made available+
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* under the terms of "Eclipse Public License v1.0"+
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* which accompanies this distribution, and is available+
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".+
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*+
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* Initial Contributors:+
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* Nokia Corporation - initial contribution.+
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*+
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* Contributors:+
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*+
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* Description:  Content writer for the XML Serializer.+
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*+
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*/+
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+
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// INCLUDE FILES+
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#include <e32std.h>+
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#include "TPEngWriter.h"+
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+
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+
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+
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// ================= MEMBER FUNCTIONS =======================+
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// C++ default constructor can NOT contain any code, that+
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// might leave.+
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//+
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TPEngWriter::TPEngWriter( TDes8& aBuffer )+
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        : iBuffer( aBuffer )+
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    {+
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    }+
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+
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+
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// -----------------------------------------------------------------------------+
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// TPEngWriter::WriteL()+
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//+
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// Writes the text to buffer, leaves if the buffer overflows.+
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// Returns pointer descriptor pointing to just written text+
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// (pointer desriptor stays valid until the actual buffer stays valid).+
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// -----------------------------------------------------------------------------+
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//+
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const TPtrC8 TPEngWriter::WriteL( const TDesC8& aText )+
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    {+
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    if ( iBuffer.MaxLength() < ( iBuffer.Length() + aText.Length() ) )+
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        {+
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        User::Leave( KErrOverflow );+
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        }+
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+
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    else+
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        {+
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        TInt startOfNew( iBuffer.Length() );+
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        iBuffer.Append( aText );+
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        return iBuffer.Mid( startOfNew );+
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        }+
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+
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    return TPtrC8( NULL, 0 );+
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    }+
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+
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+
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// -----------------------------------------------------------------------------+
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// TPEngWriter::WriteL()+
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//+
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// Writes one character to buffer, leaves if the buffer overflows.+
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// -----------------------------------------------------------------------------+
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//+
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void TPEngWriter::WriteL( TUint8 aCharacter )+
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    {+
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    if ( iBuffer.MaxLength() < ( iBuffer.Length() + 1 ) ) //here magic number 1 means that we are+
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        //writing just one character at time+
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        {+
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        User::Leave( KErrOverflow );+
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        }+
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+
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    else+
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        {+
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        iBuffer.Append( &aCharacter, 1 );  //here magic number 1 means that we are+
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        //writing just one character at time+
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        }+
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    }+
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+
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// -----------------------------------------------------------------------------+
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// TPEngWriter::CurrentLength()+
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// -----------------------------------------------------------------------------+
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//+
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TInt TPEngWriter::CurrentLength()+
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    {+
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    return iBuffer.Length();+
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    }+
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+
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+
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+
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// -----------------------------------------------------------------------------+
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// TPEngWriter::ReverseTo()+
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// -----------------------------------------------------------------------------+
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//+
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TInt TPEngWriter::ReverseTo( TInt aLength )+
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    {+
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    if ( aLength > iBuffer.Length() )+
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        {+
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        return KErrUnderflow;+
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        }+
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+
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    iBuffer.SetLength( aLength );+
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    return KErrNone;+
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    }+
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+
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+
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//  End of File+
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