1 /*

     2 * Copyright (c) 2002-2006 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 the License "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:   Declaration of the WlanPRNGenerator class.

    15 *

    16 */

    17 

    18 /*

    19 * %version: 6 %

    20 */

    21 

    22 #ifndef WLANPNRGENERATOR_H

    23 #define WLANPNRGENERATOR_H

    24 

    25 /**

    26 *  Class implements a pseudorandom number generator of 32 bit unsigned integers

    27 *

    28 *  Full periodic PRN generator. 

    29 *  All the numbers between 0 and 2pow31 - 1 are generated before repeating.

    30 *  Executes efficiently with 32-bit arithmetic

    31 *

    32 *  @lib wlanumac.lib

    33 *  @since S60 v3.1

    34 */

    35 class WlanPRNGenerator

    36     {

    37     enum { EMultiplier = 16807 /* 7pow5 */};

    38     enum { EModulus = 2147483647 /* 2pow31 - 1 */};

    39 

    40 public:

    41 

    42     /**

    43     * C++ default constructor.

    44     */

    45     inline WlanPRNGenerator();

    46 

    47     /**

    48     * PRN generation function.

    49     * @since S60 3.1

    50     * @return generated PRN

    51     */

    52     inline TUint32 Generate();

    53                         

    54 private:

    55 

    56     // Prohibit copy constructor

    57     WlanPRNGenerator( const WlanPRNGenerator& );

    58     // Prohibit assigment operator

    59     WlanPRNGenerator& operator= ( const WlanPRNGenerator& );   

    60 

    61 private: // Data

    62 

    63     /** PRN value */

    64     TUint32 iValue;

    65     };

    66 

    67 #include "UmacPRNGenerator.inl"

    68 

    69 #endif      // WLANPNRGENERATOR_H