/*
* Copyright (c) 2003 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 header file
*
*/
#ifndef CNVGICONDATA_H_
#define CNVGICONDATA_H_
#include <e32base.h>
#include <s32mem.h>
/**
* @class CNVGIconData
* This class is useful when you want to read nd write data from and to memory
* This class check for buffer overflow
* This is much faster than stream classes provided by symbian
* During the ETM traces we found that those classes are 3 FPS less than these utility classes
* This class will be checking for data alignment
*/
class CNVGIconData : public CBase
{
private:
CNVGIconData();
void ConstructL(TUint aLength);
void ConstructL(const TDesC8& aBuf);
public:
/**
* Here the user should only read. Will Behave undefinitly if try to write.
*/
static CNVGIconData * NewL(const TDesC8& aBuf);
static CNVGIconData * NewL(TInt aLength = 0);
static CNVGIconData * NewLC(const TDesC8& aBuf);
static CNVGIconData * NewLC(TInt aLength = 0);
static CNVGIconData * NewL(TUint8 * aBuf, TInt aLength);
static CNVGIconData * NewLC(TUint8 * aBuf, TInt aLength);
virtual ~CNVGIconData();
void Set(const TDesC8& aBuf);
void Set(TUint8 * aBuf, TInt aLength);
TInt EncodeInt8(TUint8 aVal);
TInt EncodeInt16(TUint16 aVal);
TInt EncodeInt32(TUint32 aVal);
TInt EncodeReal32(TReal32 aVal);
TInt EncodeReal64(TReal64 aVal);
TInt EncodeData(const TAny *aData, TUint aLength);
void EncodeInt8L(TUint8 aVal);
void EncodeInt16L(TUint16 aVal);
void EncodeInt32L(TUint32 aVal);
void EncodeReal32L(TReal32 aVal);
void EncodeReal64L(TReal64 aVal);
void EncodeDataL(const TAny *aData, TUint aLength);
TInt ExpandEncodedData(TUint aNewLength);
const HBufC8 * GetNVGData() const;
const HBufC8 * GetNVGData();
void BeginRead();
void EndRead();
TInt16 ReadInt16L();
TInt32 ReadInt32L();
TInt8 ReadInt8L();
void ReadL(TDes8 &aDes, TInt aLength);
void ReadL(TUint8 *aPtr, TInt aLength);
TReal32 ReadReal32L();
TReal64 ReadReal64L();
void SkipL(TInt aLength);
TInt ReadPos();
TBool EOF();
TInt DataLength();
private:
void CheckOutOfBoundL(TInt aLength);
HBufC8 * iNVGData;
TPtr8 iNVGDataPtr;
TInt iTotalRead;
TInt iDataLength;
TUint8 * iReadStream;
};
/**
* @class TDereferencer
* This class is useful when you want to dereference character data
* This class check for buffer overflow
* This is much faster than stream classes provided by symbian
* During the ETM traces we found that those classes are 3 FPS less than these utility classes
* This class won't be checking for data alignment.
*/
class TDereferencer
{
public:
TDereferencer(TUint8 * aBuf, TInt aLength);
TDereferencer(const TDesC8& aBuf);
/**
* @fn SkipL
* Advances the read pointer with the given length
*/void SkipL(TInt aLength);
/**
* @fn DerefInt16L
* Converts current position to TInt16 *. The caller should take care of alignment
* The advantage of this method is that you don't have to copy the data
* Bound check will happen
* @param aAt dereference from this position
* @exception Leaves if data size is not sufficient
*/
TInt16 DerefInt16L(TInt aAt = 0);
operator TInt16();
/**
* @fn DerefInt32L
* Converts current position to TInt32 *. The caller should take care of alignment
* The advantage of this method is that you don't have to copy the data
* Bound check will happen
* @param aAt dereference from this position
* @exception Leaves if data size is not sufficient
*/
TInt32 DerefInt32L(TInt aAt = 0);
operator TInt32();
/**
* @fn DerefInt8L
* Converts current position to TInt8 *. The caller should take care of alignment
* The advantage of this method is that you don't have to copy the data
* Bound check will happen
* @param aAt dereference from this position
* @exception Leaves if data size is not sufficient
*/
TInt8 DerefInt8L(TInt aAt = 0);
operator TInt8();
/**
* @fn DerefInt8ArrayL
* Converts current position to TUint8 *. The caller should take care of alignment
* The advantage of this method is that you don't have to copy the data
* Bound check will happen
* @param aLength making safe to dereference for this size
* @param aAt dereference from this position
* @exception Leaves if data size is not sufficient
*/
TUint8 * DerefInt8ArrayL(TInt aLength, TInt aAt = 0);
/**
* @fn ReadReal32L
* Converts current position to TReal32 *. The caller should take care of alignment
* The advantage of this method is that you don't have to copy the data
* Bound check will happen
* @param aAt dereference from this position
* @exception Leaves if data size is not sufficient
*/
TReal32 DerefReal32L(TInt aAt = 0);
operator TReal32();
/**
* @fn ReadReal64L
* Converts current position to TReal64 *. The caller should take care of alignment
* The advantage of this method is that you don't have to copy the data
* Bound check will happen
* @param aAt dereference from this position
* @exception Leaves if data size is not sufficient
*/
TReal64 DerefReal64L(TInt aAt = 0);
operator TReal64();
/**
* @fn IsSafeL
* Checks whether dereferencing is safe for the given length from the given offset
* @param aLength length for dereferencing
* @param aAt offset from where the dereferencing should start
*/
void IsSafeL(TInt aLength, TInt aAt = 0);
/**
* @fn GetPtr
* Retrieves the ptr to the data stream
*/
TPtr8 GetPtr();
/**
* Retrieves the silze of the buffer
*/
TInt GetLength();
/**
* Returns current reading position
*/
TInt GetReadingPos();
private:
void CheckOutOfBoundL(TInt aLength);
TInt iTotalRead;
TInt iDataLength;
TUint8 * iReadStream;
};
#include "NVGIconData.inl"
#endif