sl@0: // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #if !defined(__U32FRAME_H__)
sl@0: #define __U32FRAME_H__
sl@0: #if !defined(__S32SHARE_H__)
sl@0: #include <s32share.h>
sl@0: #endif
sl@0: 
sl@0: #if defined(_DEBUG)&&!defined(__SMALL_FRAME)
sl@0: //#define __SMALL_FRAME
sl@0: #endif
sl@0: //
sl@0: enum TFrameType16
sl@0: 	{
sl@0: 	EFrameFree16=0x0000,
sl@0: 	EFrameData16=0x4000,
sl@0: 	EFrameDescriptive16=0x8000,
sl@0: 	EFrameContinuation16=0xc000
sl@0: 	};
sl@0: typedef TUint16 TFrameDes16;
sl@0: const TInt KSizeFrameDes16=sizeof(TFrameDes16);
sl@0: const TInt KShiftFrameDes16=1;
sl@0: //
sl@0: const TInt KMaskFrame16=0xffff;
sl@0: const TInt KMaskFrameType16=0xc000;
sl@0: #if defined(__SMALL_FRAME)
sl@0: const TInt KMaskFrameLength16=0xf;
sl@0: const TInt KShiftFrameLength16=4;
sl@0: #else
sl@0: const TInt KMaskFrameLength16=0x3fff;
sl@0: const TInt KShiftFrameLength16=14;
sl@0: #endif
sl@0: //
sl@0: const TInt KFrameOpen16=0;
sl@0: const TInt KFrameMinLength16=1;
sl@0: const TInt KFrameMaxLength16=KMaskFrameLength16;
sl@0: const TInt KFrameFullLength16=KMaskFrameLength16+1;
sl@0: //
sl@0: const TInt KFrameNonexistent16=-1;
sl@0: //
sl@0: NONSHARABLE_CLASS(RFrame16Buf) : public MStreamBuf
sl@0: 	{
sl@0: public:
sl@0: 	static TInt Offset(TStreamPos aBase,TStreamPos aPos);
sl@0: 	static TStreamPos Position(TStreamPos aBase,TInt anOffset);
sl@0: //
sl@0: 	RFrame16Buf(TStreamPos aBase);
sl@0: 	inline TStreamPos Base() const;
sl@0: 	inline TInt Offset(TStreamPos aPos) const;
sl@0: 	inline TStreamPos Position(TInt anOffset) const;
sl@0: //
sl@0: 	TInt ExtendL(TStreamExchange& aHost,TInt anExtent,TInt aMode=ERead|EWrite);
sl@0: 	void OpenL(TStreamExchange& aHost,TInt anOffset,TInt aMode=ERead|EWrite);
sl@0: 	void Set(TStreamExchange& aHost,TInt anOffset,TInt anExtent,TInt aMode=ERead|EWrite);
sl@0: //
sl@0: 	inline TInt Offset() const;
sl@0: 	inline TInt Extent() const;
sl@0: protected:
sl@0: 	inline TBool IsCommitted() const;
sl@0: 	void CommitL();
sl@0: //
sl@0: 	void DoRelease();
sl@0: 	void DoSynchL();
sl@0: private:
sl@0: 	TInt DoReadL(TAny* aPtr,TInt aMaxLength);
sl@0: 	TInt DoReadL(TDes8& aDes,TInt aMaxLength,TRequestStatus& aStatus);
sl@0: 	TStreamTransfer DoReadL(MStreamInput& anInput,TStreamTransfer aTransfer);
sl@0: 	void DoWriteL(const TAny* aPtr,TInt aLength);
sl@0: 	TInt DoWriteL(const TDesC8& aDes,TInt aMaxLength,TRequestStatus& aStatus);
sl@0: 	TStreamTransfer DoWriteL(MStreamOutput& anOutput,TStreamTransfer aTransfer);
sl@0: 	TStreamPos DoSeekL(TMark aMark,TStreamLocation aLocation,TInt anOffset);
sl@0: //
sl@0: 	inline TStreamExchange& Host() const;
sl@0: 	TInt UnderflowL();
sl@0: 	void OverflowL();
sl@0: 	TBool ReachL(TInt anOffset);
sl@0: 	TInt EndL();
sl@0: private:
sl@0: 	TStreamPos iBase;
sl@0: 	TStreamExchange* iHost;
sl@0: 	TInt iOff;
sl@0: 	TInt iExt;
sl@0: 	TStreamMark iRMark,iWMark;
sl@0: 	TInt iRAvail,iWAvail;
sl@0: 	TInt iRLim,iWLim;
sl@0: 	TInt iMode;
sl@0: 	};
sl@0: 
sl@0: #include "U32FRAME.INL"
sl@0: #endif