// Copyright (c) 1995-2009 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:

// e32test\math\largeint.h

// 

//

#ifndef __LARGEINT_H__

#define __LARGEINT_H__

#include <e32std.h>

#define __ASSERT(c)		__ASSERT_DEBUG(c,User::Invariant())

class TLargeIntBase

	{

public:

	enum TMode {EZeroExtend,ESignExtend,ETruncate};

	TLargeIntBase(TInt n);

	TLargeIntBase(TInt n, TInt32 aSigned32);

	TLargeIntBase(TInt n, TUint32 aUnsigned32);

	TLargeIntBase(TInt n, const TLargeIntBase&, TMode);

	TLargeIntBase(TInt n, const TUint32* aPtr);

	TLargeIntBase(TInt n, const Int64& aSigned64);

	TLargeIntBase(TInt n, const Uint64& aUnsigned64);

public:

	void Not();

	void Neg();

	void Abs();

	void Inc();

	void Dec();

	TUint32 Lsl();

	TUint32 Lsr();

	TUint32 Asr();

	void Lsl(TInt aCount);

	void Lsr(TInt aCount);

	void Asr(TInt aCount);

	void Add(const TLargeIntBase&);

	void Sub(const TLargeIntBase&);

	void Mul(const TLargeIntBase&);

	void DivU(const TLargeIntBase& aDivisor, TLargeIntBase& aRem);

	void DivS(const TLargeIntBase& aDivisor, TLargeIntBase& aRem);

	TInt CompareU(const TLargeIntBase&) const;

	TInt CompareS(const TLargeIntBase&) const;

	inline TLargeIntBase& operator++() {Inc(); return *this;}

	inline TLargeIntBase& operator--() {Dec(); return *this;}

public:

	inline TBool operator==(const TLargeIntBase& a) const

		{return CompareU(a)==0;}

	inline TBool operator!=(const TLargeIntBase& a) const

		{return CompareU(a)!=0;}

	inline TBool Hi(const TLargeIntBase& a) const

		{return CompareU(a)>0;}

	inline TBool Hs(const TLargeIntBase& a) const

		{return CompareU(a)>=0;}

	inline TBool Lo(const TLargeIntBase& a) const

		{return CompareU(a)<0;}

	inline TBool Ls(const TLargeIntBase& a) const

		{return CompareU(a)<=0;}

	inline TBool Gt(const TLargeIntBase& a) const

		{return CompareS(a)>0;}

	inline TBool Ge(const TLargeIntBase& a) const

		{return CompareS(a)>=0;}

	inline TBool Lt(const TLargeIntBase& a) const

		{return CompareS(a)<0;}

	inline TBool Le(const TLargeIntBase& a) const

		{return CompareS(a)<=0;}

	inline TUint32& operator[](TInt a)

		{__ASSERT(TUint32(a)<TUint32(iC)); return iX[a];}

	inline TUint32 operator[](TInt a) const

		{__ASSERT(TUint32(a)<TUint32(iC)); return iX[a];}

public:

	TInt iC;

	TUint32 iX[1];

	};

template <TInt n>

class TLargeInt : public TLargeIntBase

	{

public:

	inline TLargeInt() : TLargeIntBase(n) {}

	inline TLargeInt(TInt32 aSigned32) : TLargeIntBase(n,aSigned32) {}

	inline TLargeInt(TUint32 aUnsigned32) : TLargeIntBase(n,aUnsigned32) {}

	inline TLargeInt(const TLargeIntBase& aSrc, TMode aMode) : TLargeIntBase(n,aSrc,aMode) {}

	inline TLargeInt(const TUint32* aPtr) : TLargeIntBase(n, aPtr) {}

	inline TLargeInt(const Int64& aSigned64) : TLargeIntBase(n, aSigned64) {}

	inline TLargeInt(const Uint64& aUnsigned64) : TLargeIntBase(n, aUnsigned64) {}

	inline TLargeInt<2*n> LongMultU(const TLargeInt<n>& a) const

		{TLargeInt<2*n> x(*this,EZeroExtend); TLargeInt<2*n> y(a,EZeroExtend); x.Mul(y); return x;}

	inline TLargeInt<2*n> LongMultS(const TLargeInt<n>& a) const

		{TLargeInt<2*n> x(*this,ESignExtend); TLargeInt<2*n> y(a,ESignExtend); x.Mul(y); return x;}

public:

	TUint32 iExtra[n-1];

	};

#define CHECK(X)	void __compile_assert(int __check[(X)?1:-1])

#endif