/*
* Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of the License "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:
* Declaration of the CDesSisDataProvider
*
*/
/**
@file
@released
@internalTechnology
*/
#ifndef __DESSISDATAPROVIDER_H
#define __DESSISDATAPROVIDER_H
#include <e32std.h>
#include "sisdataprovider.h"
namespace Swi
{
/**
* Implementation of MSisDataProvider interface that takes a descriptor as data
* source
*
* @released
* @internalTechnology
*/
class CDesDataProvider : public CBase, public MSisDataProvider
{
public:
/**
* Constructs a new DES data provider object.
*
* @param aDes Descriptor to use as data source
*
* @return Pointer to a newly created object
*/
IMPORT_C static CDesDataProvider* NewL(const TDesC8& aDes);
/**
* Constructs a new DES data provider object and places it on the
* cleanup stack.
*
* @param aDes Descriptor to use as data source
*
* @return Pointer to a newly created object
*/
IMPORT_C static CDesDataProvider* NewLC(const TDesC8& aDes);
public: // From MSisDataProvider
/**
* Reads data from data source into a descriptor
*
* @param aDes Descriptor to read into (up to its max length)
* @return KErrNone or an error code
*/
IMPORT_C virtual TInt Read(TDes8& aDes);
/**
* Reads the specified amount of data into a descriptor
*
* @param aDes Descriptor to read data into
* @param aLength Max data length to be read
* @return KErrNone or an error code
*/
IMPORT_C virtual TInt Read(TDes8& aDes, TInt aLength);
/**
* Seeks into data source
*
* @param aMode Seek mode; the following modes are supported:
* ESeekStart Seek from the beginning of data
* ESeekCurrent Seek from the current position
* ESeekEnd Seek from the end of data
* @return KErrNone or an error code
*
* For more information on this function see the specification
* of the following functions in the Symbian OS Library:
* - CData::Seek(), which is used in CCafSisDataProvider::Seek(),
* - RFile::Seek(), which is used in CFileSisDataProvider::Seek()
*/
IMPORT_C virtual TInt Seek(TSeek aMode, TInt64& aPos);
IMPORT_C virtual ~CDesDataProvider();
private:
/**
* The constructor.
*/
CDesDataProvider(const TDesC8& aDes);
/** Des to read the data from */
TPtrC8 iDes;
/** Position **/
TInt32 iPos;
};
} // namespace Swi
#endif // #ifndef __DESSISDATAPROVIDER_H