1 /*

     2 * Copyright (c) 2002-2007 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Skin server's file buffer.

    15 *

    16 */

    17 

    18 

    19 #ifndef AKNSSRVFILEBUFFER_H

    20 #define AKNSSRVFILEBUFFER_H

    21 

    22 // INCLUDE FILES

    23 

    24 #include <e32std.h>

    25 #include <f32file.h>

    26 #include <caf/caf.h>

    27 // CLASS DECLARATION

    28 

    29 /**

    30 * 

    31 */

    32 NONSHARABLE_CLASS(CAknsSrvFileBuffer) : public CBase

    33     {

    34     public: // Construction and destruction

    35 

    36         /**

    37         * Symbian constructor.

    38         * @param aFilehandle file handle.

    39         * @return new instance of CAknsSrvFileBuffer.

    40         */

    41         static CAknsSrvFileBuffer* NewL( RFile& aFilehandle );

    42         /**

    43         * Destructor.

    44         */

    45         virtual ~CAknsSrvFileBuffer();

    46 

    47     public: // New methods

    48 

    49         /**

    50         * Gets 32-bit integer value from file.

    51         * @param aOffset offset in the file

    52         * @return 32-bit integer value from file.

    53         */

    54         TInt32 GetInt32L( const TUint aOffset );

    55 

    56         /**

    57         * Gets 16-bit unsigned integer value from file.

    58         * @param aOffset offset in the file

    59         * @return 16-bit unsigned integer value from file.

    60         */

    61         TUint16 GetUint16L( const TUint aOffset );

    62 

    63         /**

    64         * Gets 16-bit integer value from file.

    65         * @param aOffset offset in the file

    66         * @return 16-bit integer value from file.

    67         */

    68         TInt16 GetInt16L( const TUint aOffset );

    69 

    70         /**

    71         * Gets 8-bit unsigned integer value from file.

    72         * @param aOffset offset in the file

    73         * @return 8-bit unsigned integer value from file.

    74         */

    75         TUint8 GetUint8L( const TUint aOffset );

    76 

    77     private: // New methods

    78 

    79         /**

    80         * Makes pointer to buffer.

    81         */

    82         const TAny* PtrToBuffer( const TUint aOffset ) const;

    83 

    84         /**

    85         * Reads buffer from given offset.

    86         */

    87         void ReadToBufferL( const TUint aOffset, const TUint aSize );

    88 

    89         /**

    90         * Fills buffer.

    91         */

    92         void FillBufferL();

    93 

    94         /**

    95         * Checks if offset is within range.

    96         */

    97         TBool IsWithin( const TUint aOffset, const TUint aSize ) const;

    98 

    99     private: // Construction and destruction

   100 

   101         /**

   102         * Symbian 2nd phase constructor.

   103         */

   104         void ConstructL(RFile& aFilehandle);

   105 

   106         /**

   107         * C++ constructor.

   108         */

   109         CAknsSrvFileBuffer();

   110 

   111 

   112     private: // Data

   113 

   114         ContentAccess::CContent* iContent;

   115         ContentAccess::CData* iData;

   116         HBufC8* iBuffer;

   117         TInt iPosition;

   118         TInt iLength;

   119 

   120     };

   121 

   122 #endif

   123 

   124 // End of File