crypto/weakcrypto/source/bigint/stackinteger.h
author hgs
Thu, 24 Jun 2010 15:39:07 +0530
changeset 72 de46a57f75fb
permissions -rw-r--r--
201023_02
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
72
de46a57f75fb 201023_02
hgs
parents:
diff changeset
     1
/*
de46a57f75fb 201023_02
hgs
parents:
diff changeset
     2
* Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
de46a57f75fb 201023_02
hgs
parents:
diff changeset
     3
* All rights reserved.
de46a57f75fb 201023_02
hgs
parents:
diff changeset
     4
* This component and the accompanying materials are made available
de46a57f75fb 201023_02
hgs
parents:
diff changeset
     5
* under the terms of the License "Eclipse Public License v1.0"
de46a57f75fb 201023_02
hgs
parents:
diff changeset
     6
* which accompanies this distribution, and is available
de46a57f75fb 201023_02
hgs
parents:
diff changeset
     7
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
de46a57f75fb 201023_02
hgs
parents:
diff changeset
     8
*
de46a57f75fb 201023_02
hgs
parents:
diff changeset
     9
* Initial Contributors:
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    10
* Nokia Corporation - initial contribution.
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    11
*
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    12
* Contributors:
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    13
*
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    14
* Description: 
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    15
* TStackInteger class implementation
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    16
*
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    17
*/
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    18
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    19
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    20
/**
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    21
 @file 
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    22
 @internalComponent
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    23
*/
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    24
 
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    25
#ifndef __STACK_INTEGER_H__
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    26
#define __STACK_INTEGER_H__
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    27
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    28
#include "bigint.h"
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    29
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    30
/** An integer that can be created on the stack.\n\n
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    31
 * The resulting integers are
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    32
 * fixed in size and any code that tries to modify their memory allocation
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    33
 * will panic.  Stack based integers may be modified as long as you can
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    34
 * guarantee that the resulting integer will fit in the current amount of
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    35
 * allocated memory.  For integers that can dynamically grow see RInteger.
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    36
 * If you are not sure which integer you want, you want an RInteger.
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    37
 * @internalComponent
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    38
 * @released
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    39
 * @see RInteger
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    40
 */
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    41
template <TUint W=2> 
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    42
class TStackInteger : public TInteger
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    43
	{
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    44
public:
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    45
	inline TStackInteger<W>(TUint aInteger) {ConstructStack(W, aInteger);}
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    46
	inline TStackInteger<W>(const TInteger& aInteger) {ConstructStack(W, aInteger);}
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    47
protected:
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    48
	TUint32 iBuf[W];
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    49
	};
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    50
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    51
typedef TStackInteger<2> TStackInteger64;
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    52
typedef TStackInteger<4> TStackInteger128;
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    53
typedef TStackInteger<8> TStackInteger256;
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    54
typedef TStackInteger<16> TStackInteger512;
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    55
typedef TStackInteger<32> TStackInteger1024;
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    56
typedef TStackInteger<64> TStackInteger2048;
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    57
//Don't make them any bigger than this :).  The last one is 66 words (264 bytes)
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    58
de46a57f75fb 201023_02
hgs
parents:
diff changeset
    59
#endif // __STACK_INTEGER_H__