/*

* Copyright (c) 2008 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:  NVG Decoder source file

 *

*/

#include "NVGIconData.h"

//const TUint KEncodedDataLength        = 1024;

const TUint KEncodedDataGranularity   = 64;

CNVGIconData::CNVGIconData()

    : iNVGData(0),

    iNVGDataPtr(0, 0),

    iTotalRead(0),

    iReadStream(0)

    {

    }

CNVGIconData::~CNVGIconData()

    {

    delete iNVGData;

    }

CNVGIconData * CNVGIconData::NewL(TInt aLength)

    {

    CNVGIconData* self    = CNVGIconData::NewLC(aLength);

    CleanupStack::Pop(self);

    return self;

    }

CNVGIconData * CNVGIconData::NewLC(TInt aLength)

    {

    CNVGIconData* self    = new (ELeave) CNVGIconData;

    CleanupStack::PushL(self);

    self->ConstructL(aLength);

    return self;

    }

CNVGIconData * CNVGIconData::NewL(const TDesC8& aBuf)

    {

    CNVGIconData* self    = CNVGIconData::NewLC(aBuf);

    CleanupStack::Pop(self);

    return self;

    }

CNVGIconData * CNVGIconData::NewLC(const TDesC8& aBuf)

    {

    CNVGIconData* self    = new (ELeave) CNVGIconData;

    CleanupStack::PushL(self);

    self->ConstructL(aBuf);

    return self;

    }

CNVGIconData * CNVGIconData::NewL(TUint8 * aBuf, TInt aLength)

    {

    return CNVGIconData::NewL(TPtr8(aBuf, aLength, aLength));

    }

CNVGIconData * CNVGIconData::NewLC(TUint8 * aBuf, TInt aLength)

    {

    return CNVGIconData::NewLC(TPtr8(aBuf, aLength, aLength));

    }

void CNVGIconData::ConstructL(const TDesC8& aBuf)

    {

    iNVGDataPtr.Set((TUint8 *)aBuf.Ptr(), aBuf.Length(), aBuf.Length());

    //set the reading pointers

    BeginRead();

    }

void CNVGIconData::ConstructL(TUint aLength)

    {    

    iNVGData = HBufC8::NewL(aLength);

    iNVGDataPtr = iNVGData->Des();

    }

void CNVGIconData::EncodeDataL(const TAny *aData, TUint aLength)

    {

    TInt result = KErrNone;

    TInt encodedDataLength      = iNVGDataPtr.Length() + aLength;

    TInt encodedDataMaxLength   = iNVGDataPtr.MaxLength();

    if (encodedDataLength >= encodedDataMaxLength)

        {

        result = ExpandEncodedData(encodedDataLength);

        if (result != KErrNone)

            {

            User::Leave(result);

            }

        iNVGDataPtr.Append((TUint8*)(aData), aLength);

        }

    else

        {

        iNVGDataPtr.Append((TUint8*)(aData), aLength);

        }    

    }

TInt CNVGIconData::EncodeData(const TAny *aData, TUint aLength)

    {

    TInt result = KErrNone;

    TInt encodedDataLength      = iNVGDataPtr.Length() + aLength;

    TInt encodedDataMaxLength   = iNVGDataPtr.MaxLength();

    if (encodedDataLength >= encodedDataMaxLength)

        {

        result = ExpandEncodedData(encodedDataLength);

        if (result == KErrNone)

            {

            iNVGDataPtr.Append((TUint8*)(aData), aLength);

            }

        }

    else

        {

        iNVGDataPtr.Append((TUint8*)(aData), aLength);

        }

    return result;

    }

TInt CNVGIconData::ExpandEncodedData(TUint aNewLength)

    {

    TInt result = KErrNone;

    TInt encodedDataMaxLength   = iNVGDataPtr.MaxLength();

    TUint granularities = ((aNewLength - encodedDataMaxLength) / KEncodedDataGranularity) + 1;

    HBufC8 * tmpBuf = HBufC8::New(encodedDataMaxLength + granularities * KEncodedDataGranularity);

    if (tmpBuf == 0)

        {

        result = KErrNoMemory;

        }

    else

        {

        TPtr8 tmpBufPtr (tmpBuf->Des());

        tmpBufPtr.Copy(*iNVGData);

        delete iNVGData;

        iNVGData = tmpBuf;

        iNVGDataPtr.Set(iNVGData->Des());

        }

    return result;

    }

void CNVGIconData::BeginRead()

    {

    iDataLength = iNVGDataPtr.Length();

    iTotalRead = 0;

    iReadStream = (TUint8 *)iNVGDataPtr.Ptr();

    }

void CNVGIconData::EndRead()

    {

    }

#define STR_TO_OTHER_DIR(TOTYPE) do {\

                                TOTYPE data = *(TOTYPE *)&iReadStream[iTotalRead];\

                                iTotalRead += sizeof(TOTYPE);\

                                return data;\

                           } while (0)

#define STR_TO_OTHER_IDIR(TOTYPE) do {\

                                TOTYPE data;\

                                TUint8 * dataPtr = (TUint8 *)&data;\

                                for (TInt i = 0; i < sizeof(TOTYPE); ++i)\

                                    {\

                                    dataPtr[i] = iReadStream[iTotalRead+i];\

                                    }\

                                iTotalRead += sizeof(TOTYPE);\

                                return data;\

                            } while (0)

#define STR_TO_OTHER(TOTYPE) do {\

                                CheckOutOfBoundL(sizeof(TOTYPE));\

                                if (reinterpret_cast<int>(&iReadStream[iTotalRead]) & (sizeof(TOTYPE) - 1))\

                                    {\

                                    STR_TO_OTHER_IDIR(TOTYPE);\

                                    }\

                                else\

                                    {\

                                    STR_TO_OTHER_DIR(TOTYPE);\

                                    }\

                            } while (0)

TInt16 CNVGIconData::ReadInt16L()

    {

    STR_TO_OTHER(TInt16);

    }

TInt32 CNVGIconData::ReadInt32L()

    {

    STR_TO_OTHER(TInt32);

    }

TInt8 CNVGIconData::ReadInt8L()

    {

    CheckOutOfBoundL(sizeof(TInt8));

    STR_TO_OTHER_DIR(TInt8);

    }

TReal32 CNVGIconData::ReadReal32L()

    {

    STR_TO_OTHER(TReal32);

    }

TReal64 CNVGIconData::ReadReal64L()

    {

    CheckOutOfBoundL(sizeof(TReal64));

    STR_TO_OTHER_IDIR(TReal64);

    }

void CNVGIconData::ReadL(TDes8 &aDes, TInt aLength)

    {

    CheckOutOfBoundL(aLength);

    aDes.Copy(&iReadStream[iTotalRead], aLength);

    iTotalRead += aLength;

    }

void CNVGIconData::ReadL(TUint8 *aPtr, TInt aLength)

    {

    CheckOutOfBoundL(aLength);

    memcpy(aPtr, &iReadStream[iTotalRead], aLength);

    iTotalRead += aLength;

    }

void CNVGIconData::SkipL(TInt aLength)

    {

    CheckOutOfBoundL(aLength);

    iTotalRead += aLength;

    }