1 // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #if !defined(__U32FRAME_H__)

    17 #define __U32FRAME_H__

    18 #if !defined(__S32SHARE_H__)

    19 #include <s32share.h>

    20 #endif

    21 

    22 #if defined(_DEBUG)&&!defined(__SMALL_FRAME)

    23 //#define __SMALL_FRAME

    24 #endif

    25 //

    26 enum TFrameType16

    27 	{

    28 	EFrameFree16=0x0000,

    29 	EFrameData16=0x4000,

    30 	EFrameDescriptive16=0x8000,

    31 	EFrameContinuation16=0xc000

    32 	};

    33 typedef TUint16 TFrameDes16;

    34 const TInt KSizeFrameDes16=sizeof(TFrameDes16);

    35 const TInt KShiftFrameDes16=1;

    36 //

    37 const TInt KMaskFrame16=0xffff;

    38 const TInt KMaskFrameType16=0xc000;

    39 #if defined(__SMALL_FRAME)

    40 const TInt KMaskFrameLength16=0xf;

    41 const TInt KShiftFrameLength16=4;

    42 #else

    43 const TInt KMaskFrameLength16=0x3fff;

    44 const TInt KShiftFrameLength16=14;

    45 #endif

    46 //

    47 const TInt KFrameOpen16=0;

    48 const TInt KFrameMinLength16=1;

    49 const TInt KFrameMaxLength16=KMaskFrameLength16;

    50 const TInt KFrameFullLength16=KMaskFrameLength16+1;

    51 //

    52 const TInt KFrameNonexistent16=-1;

    53 //

    54 NONSHARABLE_CLASS(RFrame16Buf) : public MStreamBuf

    55 	{

    56 public:

    57 	static TInt Offset(TStreamPos aBase,TStreamPos aPos);

    58 	static TStreamPos Position(TStreamPos aBase,TInt anOffset);

    59 //

    60 	RFrame16Buf(TStreamPos aBase);

    61 	inline TStreamPos Base() const;

    62 	inline TInt Offset(TStreamPos aPos) const;

    63 	inline TStreamPos Position(TInt anOffset) const;

    64 //

    65 	TInt ExtendL(TStreamExchange& aHost,TInt anExtent,TInt aMode=ERead|EWrite);

    66 	void OpenL(TStreamExchange& aHost,TInt anOffset,TInt aMode=ERead|EWrite);

    67 	void Set(TStreamExchange& aHost,TInt anOffset,TInt anExtent,TInt aMode=ERead|EWrite);

    68 //

    69 	inline TInt Offset() const;

    70 	inline TInt Extent() const;

    71 protected:

    72 	inline TBool IsCommitted() const;

    73 	void CommitL();

    74 //

    75 	void DoRelease();

    76 	void DoSynchL();

    77 private:

    78 	TInt DoReadL(TAny* aPtr,TInt aMaxLength);

    79 	TInt DoReadL(TDes8& aDes,TInt aMaxLength,TRequestStatus& aStatus);

    80 	TStreamTransfer DoReadL(MStreamInput& anInput,TStreamTransfer aTransfer);

    81 	void DoWriteL(const TAny* aPtr,TInt aLength);

    82 	TInt DoWriteL(const TDesC8& aDes,TInt aMaxLength,TRequestStatus& aStatus);

    83 	TStreamTransfer DoWriteL(MStreamOutput& anOutput,TStreamTransfer aTransfer);

    84 	TStreamPos DoSeekL(TMark aMark,TStreamLocation aLocation,TInt anOffset);

    85 //

    86 	inline TStreamExchange& Host() const;

    87 	TInt UnderflowL();

    88 	void OverflowL();

    89 	TBool ReachL(TInt anOffset);

    90 	TInt EndL();

    91 private:

    92 	TStreamPos iBase;

    93 	TStreamExchange* iHost;

    94 	TInt iOff;

    95 	TInt iExt;

    96 	TStreamMark iRMark,iWMark;

    97 	TInt iRAvail,iWAvail;

    98 	TInt iRLim,iWLim;

    99 	TInt iMode;

   100 	};

   101 

   102 #include "U32FRAME.INL"

   103 #endif