crypto/weakcrypto/source/bigint/stackinteger.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 31 Aug 2010 17:00:08 +0300
branchRCL_3
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/*
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* Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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* TStackInteger class implementation
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*
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*/
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/**
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 @file 
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 @internalComponent
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*/
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#ifndef __STACK_INTEGER_H__
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#define __STACK_INTEGER_H__
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#include "bigint.h"
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/** An integer that can be created on the stack.\n\n
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 * The resulting integers are
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 * fixed in size and any code that tries to modify their memory allocation
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 * will panic.  Stack based integers may be modified as long as you can
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 * guarantee that the resulting integer will fit in the current amount of
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 * allocated memory.  For integers that can dynamically grow see RInteger.
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 * If you are not sure which integer you want, you want an RInteger.
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 * @internalComponent
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 * @released
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 * @see RInteger
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 */
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template <TUint W=2> 
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class TStackInteger : public TInteger
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	{
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public:
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	inline TStackInteger<W>(TUint aInteger) {ConstructStack(W, aInteger);}
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	inline TStackInteger<W>(const TInteger& aInteger) {ConstructStack(W, aInteger);}
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protected:
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	TUint32 iBuf[W];
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	};
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typedef TStackInteger<2> TStackInteger64;
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typedef TStackInteger<4> TStackInteger128;
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typedef TStackInteger<8> TStackInteger256;
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typedef TStackInteger<16> TStackInteger512;
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typedef TStackInteger<32> TStackInteger1024;
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typedef TStackInteger<64> TStackInteger2048;
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//Don't make them any bigger than this :).  The last one is 66 words (264 bytes)
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#endif // __STACK_INTEGER_H__