diff -r 641f389e9157 -r a71299154b21 crypto/weakcrypto/source/bigint/windowslider.h --- a/crypto/weakcrypto/source/bigint/windowslider.h Tue Aug 31 17:00:08 2010 +0300 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,62 +0,0 @@ -/* -* Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies). -* All rights reserved. -* This component and the accompanying materials are made available -* under the terms of the License "Eclipse Public License v1.0" -* which accompanies this distribution, and is available -* at the URL "http://www.eclipse.org/legal/epl-v10.html". -* -* Initial Contributors: -* Nokia Corporation - initial contribution. -* -* Contributors: -* -* Description: -* TWindowSlider class implementation -* -*/ - - -/** - @file - @internalComponent -*/ - -#ifndef __WINDOWSLIDER_H__ -#define __WINDOWSLIDER_H__ - -#include - -class TInteger; -/** Utility class used by our fast exponentiation routines.\n\n - * See HAC 14.85 for an explanation of how window sliding helps speed things up. - * @internalComponent - */ -class TWindowSlider -{ -public: - /** - * @param aExp The exponent you are using. - * @param aWindowSize The window size. Leave as default value for the - * constructor to pick a window size appropriate for the given aExp - * @internalComponent - */ - TWindowSlider(const TInteger& aExp, TUint aWindowSize=0); - /** - * Finds the next "window" as defined by HAC 14.85. The actual bitstring - * value is in iValue and it's length in iLength. These remain valid until - * the next call to FindNextWindow() - */ - void FindNextWindow(TUint aBegin); - inline TUint WindowSize(void) {return iSize;} - inline TUint Value(void) {return iValue;} - inline TUint Length(void) {return iLength;} - -private: - const TInteger& iExp; ///the exponent all this is being calculated on - TUint iSize; ///The size of the sliding window - TUint iValue; ///the value found by the most recent FindNextWindow() call - TUint iLength;///the bit length of the iValue -}; - -#endif