1 // Copyright (c) 2008-2009 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 /**

    17  @file

    18  @InternalTechnology

    19 */

    20 

    21 #ifndef _CMTPTYPECOMPLEXBUFFER_H

    22 #define _CMTPTYPECOMPLEXBUFFER_H

    23 

    24 #include <e32base.h>

    25 #include <mtp/mmtptype.h>

    26     

    27 /**

    28 Defines the MTP Buffer data type. 

    29 @InternalTechnology

    30 @released 

    31 */

    32 class CMTPTypeComplexBuffer : public CBase, public MMTPType

    33     {

    34 public:

    35 

    36     IMPORT_C static CMTPTypeComplexBuffer* NewL();

    37     IMPORT_C static CMTPTypeComplexBuffer* NewL(const TDesC8& aData);

    38     IMPORT_C static CMTPTypeComplexBuffer* NewLC();

    39     IMPORT_C static CMTPTypeComplexBuffer* NewLC(const TDesC8& aData);

    40 	IMPORT_C ~CMTPTypeComplexBuffer();

    41     

    42 	

    43 	IMPORT_C const TDesC8& Buffer();

    44 	IMPORT_C void SetBuffer(const TDesC8& aData );

    45 	

    46 public: // From MMTPType

    47 

    48     IMPORT_C TInt FirstReadChunk(TPtrC8& aChunk) const;

    49     IMPORT_C TInt NextReadChunk(TPtrC8& aChunk) const;

    50     IMPORT_C TInt FirstWriteChunk(TPtr8& aChunk);

    51     IMPORT_C TInt NextWriteChunk(TPtr8& aChunk);

    52     IMPORT_C TUint64 Size() const;

    53     IMPORT_C TUint Type() const;

    54     IMPORT_C TBool CommitRequired() const;

    55     IMPORT_C MMTPType* CommitChunkL(TPtr8& aChunk);

    56     

    57 private:

    58 

    59     CMTPTypeComplexBuffer();

    60 	void ConstructL(const TDesC8& aData);	

    61 

    62 private:

    63 

    64     /**

    65     The read and write data stream states.

    66     */

    67     enum TReadWriteSequenceState

    68         {

    69         /**

    70         Data stream is inactive.

    71         */

    72         EIdle,

    73         

    74         /**

    75         Data stream is in progress.

    76         */

    77         EInProgress            

    78         };

    79 

    80     /**

    81     The intermediate data buffer. Note that this is declared mutable to allow 

    82     state updates while processing a read data stream.

    83     */

    84 	mutable RBuf8   iBuffer;

    85 

    86        

    87     /**

    88     The read data stream state variable. Note that this is declared mutable 

    89     to allow state updates while processing a read data stream.

    90     */

    91 	mutable TUint   iReadSequenceState;

    92     

    93     /**

    94     The write data stream state variable.

    95     */

    96 	TUint           iWriteSequenceState;

    97     };

    98     

    99 #endif // _CMTPTypeBuffer_H

   100