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/*
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* Copyright (c) 2008 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: NVG Decoder source file
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*
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*/
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#include "NVGIconData.h"
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//const TUint KEncodedDataLength = 1024;
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const TUint KEncodedDataGranularity = 64;
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CNVGIconData::CNVGIconData()
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: iNVGData(0),
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iNVGDataPtr(0, 0),
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iTotalRead(0),
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iReadStream(0)
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{
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}
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CNVGIconData::~CNVGIconData()
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{
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delete iNVGData;
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}
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CNVGIconData * CNVGIconData::NewL(TInt aLength)
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{
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CNVGIconData* self = CNVGIconData::NewLC(aLength);
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CleanupStack::Pop(self);
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return self;
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}
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CNVGIconData * CNVGIconData::NewLC(TInt aLength)
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{
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CNVGIconData* self = new (ELeave) CNVGIconData;
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CleanupStack::PushL(self);
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self->ConstructL(aLength);
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return self;
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}
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CNVGIconData * CNVGIconData::NewL(const TDesC8& aBuf)
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{
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CNVGIconData* self = CNVGIconData::NewLC(aBuf);
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CleanupStack::Pop(self);
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return self;
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}
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CNVGIconData * CNVGIconData::NewLC(const TDesC8& aBuf)
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{
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CNVGIconData* self = new (ELeave) CNVGIconData;
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CleanupStack::PushL(self);
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self->ConstructL(aBuf);
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return self;
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}
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CNVGIconData * CNVGIconData::NewL(TUint8 * aBuf, TInt aLength)
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{
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return CNVGIconData::NewL(TPtr8(aBuf, aLength, aLength));
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}
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CNVGIconData * CNVGIconData::NewLC(TUint8 * aBuf, TInt aLength)
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{
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return CNVGIconData::NewLC(TPtr8(aBuf, aLength, aLength));
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}
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void CNVGIconData::ConstructL(const TDesC8& aBuf)
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{
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iNVGDataPtr.Set((TUint8 *)aBuf.Ptr(), aBuf.Length(), aBuf.Length());
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//set the reading pointers
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BeginRead();
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}
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void CNVGIconData::ConstructL(TUint aLength)
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{
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iNVGData = HBufC8::NewL(aLength);
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iNVGDataPtr = iNVGData->Des();
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}
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void CNVGIconData::EncodeDataL(const TAny *aData, TUint aLength)
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{
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TInt result = KErrNone;
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TInt encodedDataLength = iNVGDataPtr.Length() + aLength;
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TInt encodedDataMaxLength = iNVGDataPtr.MaxLength();
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if (encodedDataLength >= encodedDataMaxLength)
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{
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result = ExpandEncodedData(encodedDataLength);
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if (result != KErrNone)
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{
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User::Leave(result);
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}
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iNVGDataPtr.Append((TUint8*)(aData), aLength);
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}
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else
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{
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iNVGDataPtr.Append((TUint8*)(aData), aLength);
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}
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}
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TInt CNVGIconData::EncodeData(const TAny *aData, TUint aLength)
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{
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TInt result = KErrNone;
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TInt encodedDataLength = iNVGDataPtr.Length() + aLength;
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TInt encodedDataMaxLength = iNVGDataPtr.MaxLength();
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if (encodedDataLength >= encodedDataMaxLength)
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{
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result = ExpandEncodedData(encodedDataLength);
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if (result == KErrNone)
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{
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iNVGDataPtr.Append((TUint8*)(aData), aLength);
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}
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}
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else
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{
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iNVGDataPtr.Append((TUint8*)(aData), aLength);
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}
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return result;
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}
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TInt CNVGIconData::ExpandEncodedData(TUint aNewLength)
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{
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TInt result = KErrNone;
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TInt encodedDataMaxLength = iNVGDataPtr.MaxLength();
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TUint granularities = ((aNewLength - encodedDataMaxLength) / KEncodedDataGranularity) + 1;
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HBufC8 * tmpBuf = HBufC8::New(encodedDataMaxLength + granularities * KEncodedDataGranularity);
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if (tmpBuf == 0)
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{
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result = KErrNoMemory;
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}
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else
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{
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TPtr8 tmpBufPtr (tmpBuf->Des());
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tmpBufPtr.Copy(*iNVGData);
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delete iNVGData;
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iNVGData = tmpBuf;
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iNVGDataPtr.Set(iNVGData->Des());
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}
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return result;
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}
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void CNVGIconData::BeginRead()
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{
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iDataLength = iNVGDataPtr.Length();
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iTotalRead = 0;
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iReadStream = (TUint8 *)iNVGDataPtr.Ptr();
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}
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void CNVGIconData::EndRead()
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{
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}
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#define STR_TO_OTHER_DIR(TOTYPE) do {\
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TOTYPE data = *(TOTYPE *)&iReadStream[iTotalRead];\
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iTotalRead += sizeof(TOTYPE);\
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return data;\
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} while (0)
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#define STR_TO_OTHER_IDIR(TOTYPE) do {\
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TOTYPE data;\
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TUint8 * dataPtr = (TUint8 *)&data;\
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for (TInt i = 0; i < sizeof(TOTYPE); ++i)\
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{\
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dataPtr[i] = iReadStream[iTotalRead+i];\
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}\
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iTotalRead += sizeof(TOTYPE);\
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return data;\
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} while (0)
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#define STR_TO_OTHER(TOTYPE) do {\
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CheckOutOfBoundL(sizeof(TOTYPE));\
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if (reinterpret_cast<int>(&iReadStream[iTotalRead]) & (sizeof(TOTYPE) - 1))\
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{\
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STR_TO_OTHER_IDIR(TOTYPE);\
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}\
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else\
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{\
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STR_TO_OTHER_DIR(TOTYPE);\
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}\
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} while (0)
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TInt16 CNVGIconData::ReadInt16L()
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{
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STR_TO_OTHER(TInt16);
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}
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TInt32 CNVGIconData::ReadInt32L()
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{
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STR_TO_OTHER(TInt32);
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}
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TInt8 CNVGIconData::ReadInt8L()
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{
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CheckOutOfBoundL(sizeof(TInt8));
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STR_TO_OTHER_DIR(TInt8);
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}
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TReal32 CNVGIconData::ReadReal32L()
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{
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STR_TO_OTHER(TReal32);
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}
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TReal64 CNVGIconData::ReadReal64L()
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{
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CheckOutOfBoundL(sizeof(TReal64));
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STR_TO_OTHER_IDIR(TReal64);
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}
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void CNVGIconData::ReadL(TDes8 &aDes, TInt aLength)
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{
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CheckOutOfBoundL(aLength);
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aDes.Copy(&iReadStream[iTotalRead], aLength);
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iTotalRead += aLength;
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}
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void CNVGIconData::ReadL(TUint8 *aPtr, TInt aLength)
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{
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CheckOutOfBoundL(aLength);
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memcpy(aPtr, &iReadStream[iTotalRead], aLength);
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iTotalRead += aLength;
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}
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void CNVGIconData::SkipL(TInt aLength)
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{
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CheckOutOfBoundL(aLength);
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iTotalRead += aLength;
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}
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