/*

* Copyright (c) 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:

*

*/

using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

using System.Runtime.InteropServices;

using SymbianUtils;

using SymbianStructuresLib.Compression.BytePair;

using SymbianStructuresLib.Compression.Inflate;

namespace SymbianStructuresLib.Compression.Common

{

    public abstract class SymbianDecompressor : DisposableObject

    {

        #region Factory

        public static SymbianDecompressor NewByType( TSymbianCompressionType aType )

        {

            SymbianDecompressor ret = null;

            //

            switch ( aType )

            {

            case TSymbianCompressionType.EBytePair:

                ret = new SymbianDecompressorBytePair();

                break;

            case TSymbianCompressionType.EDeflate:

                ret = new SymbianDecompressorInflate();

                break;

            }

            //

            return ret;

        }

        #endregion

        #region Constructors

        protected SymbianDecompressor()

        {

        }

        #endregion

        #region Framework API

        public abstract TSymbianCompressionType Type

        {

            get;

        }

        protected abstract int DoDecompressRaw( IntPtr aSource, int aSourceLength, IntPtr aDestination, int aDestinationLength );

        protected virtual int DoDecompressImage( IntPtr aSource, int aSourceLength, IntPtr aDestination, int aDestinationLength, out int aAmountOfSourceRead )

        {

            throw new NotImplementedException();

        }

        #endregion

        #region API

        public int DecompressRaw( byte[] aSource, byte[] aDestination )

        {

            if ( aSource == null || aDestination == null )

            {

                throw new ArgumentException( "Must supply data buffers" );

            }

            //

            int ret = 0;

            //

            unsafe

            {

                fixed ( byte* source = aSource )

                {

                    fixed ( byte* dest = aDestination )

                    {

                        IntPtr pSource = new IntPtr( source );

                        IntPtr pDest = new IntPtr( dest );

                        //

                        ret = DoDecompressRaw( pSource, aSource.Length, pDest, aDestination.Length );

                    }

                }

            }

            //

            return ret;

        }

        public int DecompressImage( byte[] aSource, byte[] aDestination, out int aAmountOfSourceRead )

        {

            if ( aSource == null || aDestination == null )

            {

                throw new ArgumentException( "Must supply data buffers" );

            }

            //

            int ret = 0;

            //

            unsafe

            {

                fixed ( byte* source = aSource )

                {

                    fixed ( byte* dest = aDestination )

                    {

                        IntPtr pSource = new IntPtr( source );

                        IntPtr pDest = new IntPtr( dest );

                        //

                        ret = DoDecompressImage( pSource, aSource.Length, pDest, aDestination.Length, out aAmountOfSourceRead );

                    }

                }

            }

            //

            return ret;

        }

        #endregion

        #region Properties

        #endregion

        #region Internal methods

        #endregion

        #region Data members

        #endregion

    }

}