/*

* Copyright (c) 2004-2009 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: 

* Note: This file may contain code to generate corrupt files for test purposes.

* Such code is excluded from production builds by use of compiler defines;

* it is recommended that such code should be removed if this code is ever published publicly.

* As specified in SGL.GT0188.251

*

*/

/**

 @file 

 @internalComponent

 @released

*/

#ifndef __SISEXPRESSION_H__

#define __SISEXPRESSION_H__

#include "structure.h"

#include "sisstring.h"

#include "sequence.h"

#include "numeric.h"

#include "sislanguage.h"

const std::wstring KFuncVersionPrefix = L"\\sys\\install\\pkgversion\\?";

const std::wstring KFuncSupportedLanguagePrefix = L"\\sys\\install\\supportedlanguage\\?";

class CSISExpression : public CStructure <CSISFieldRoot::ESISExpression>

	{

public:

	typedef enum {

		EOpNone = 0,

		EBinOpEqual,

		EBinOpNotEqual,

		EBinOpGreaterThan,

		EBinOpLessThan,

		EBinOpGreaterThanOrEqual,

		EBinOpLessThanOrEqual,

		ELogOpAnd,

		ELogOpOr,

		EUnaryOpNot,

		EFuncExists,

		EFuncAppProperties,

		EFuncDevProperties,

		EPrimTypeString,

		EPrimTypeOption,

		EPrimTypeVariable,

		EPrimTypeNumber,

		EOpUnknown

	} TOperator;

	void InsertMembers ();

private:

	void AddLeaf ();

	void AddLeaf (const CSISExpression& aExpression);

public:

	CSISExpression ();

	CSISExpression (const bool aRequired);

	CSISExpression (const TOperator aOperator);

	CSISExpression (const CSISExpression& aInitialiser);

	virtual void Verify (const TUint32 aLanguages) const;

	virtual std::string Name () const;

#ifdef GENERATE_ERRORS

	virtual void CreateDefects ();

#endif // GENERATE_ERRORS

	CSISExpression& operator = (const CSISExpression& aExpression);

	const CSISExpression& 	LHS () const;

	CSISExpression& 		LHS ();

	const CSISExpression& 	RHS () const;

	CSISExpression& 		RHS ();

	void SetValue (const CSISString& aValue);

	void SetValue (const TUint32 aValue);

	void SetAlwaysTrue ();

	void SetOperator (const TOperator aOperator);

	void SetOperator (const TOperator aOperator, const CSISExpression& aLHS);

	void SetLanguage ();

	void SetNumeric (const TInt32 aValue);

	void SetLanguageComparision (const TInt32 aValue);

	void SetVariable (const std::wstring& aIdentifier);

	void AddPackageEntry(std::wostream& aStream, bool aVerbose, bool aCompatible) const;

	inline CSISUInt32 Operator() const;

	inline const CSISString& String() const;

	inline TInt IntValue() const;

	void 		WriteVersionCondition (std::wostream& aStream, bool aVerbose, bool aCompatible) const;

	void 		WriteSupportedLanguageCondition (std::wostream& aStream, bool aVerbose, bool aCompatible) const;

	static bool	ExtractNextToken(std::wstring& aParseString, std::wstring& aTokenString);

	static bool	IsHexadecimal(const std::wstring& aString);

	static bool	IsHexadecimal(const std::wstring& aString, TUint32& aHexValue);

	static bool	IsDecimal(const std::wstring& aString, TInt& aDecimalValue);

private:

	CSISUInt32													iOperator;

	CSISInt32													iInteger;

	CSISString													iString;

	CSequence <CSISExpression, CSISFieldRoot::ESISExpression>	iLeaf;

	};

inline CSISExpression::CSISExpression () :

		iString (false)

	{ 

	InsertMembers (); 

	}

inline CSISExpression::CSISExpression (const bool aRequired) :

		CStructure <CSISFieldRoot::ESISExpression> (aRequired),

		iString (false)

	{ 

	InsertMembers (); 

	}

inline CSISExpression::CSISExpression (const TOperator aOperator) :

		iOperator (aOperator),

		iString (false)

	{ 

	InsertMembers (); 

	}

inline void CSISExpression::AddLeaf ()

	{ 

	assert (iLeaf.size () < 2); 

	iLeaf.Push (CSISExpression ()); 

	}

inline void CSISExpression::AddLeaf (const CSISExpression& aExpression)

	{ 

	assert (iLeaf.size () < 2); 

	iLeaf.Push (aExpression); 

	}

inline const CSISExpression& CSISExpression::LHS () const

	{ 

	assert (iLeaf.size () > 0); 

	return iLeaf [0]; 

	}

inline CSISExpression& CSISExpression::LHS ()

	{ 

	assert (iLeaf.size () > 0); 

	return iLeaf [0]; 

	}

inline const CSISExpression& CSISExpression::RHS () const

	{ 

	return iLeaf.Last (); 

	}

inline CSISExpression& CSISExpression::RHS ()

	{ 

	return iLeaf.Last ();

	}

inline void CSISExpression::SetValue (const CSISString& aValue)

	{ 

	iString = aValue; 

	}

inline void CSISExpression::SetValue (const TUint32 aValue)

	{ 

	iInteger = aValue; 

	}

inline void CSISExpression::SetAlwaysTrue ()

	{ 

	SetOperator (EUnaryOpNot); 

	RHS ().SetOperator (EPrimTypeNumber); 

	RHS ().SetValue (0); 

	}

inline void CSISExpression::SetOperator (const TOperator aOperator)

	{ 

	SetOperator (aOperator, CSISExpression ()); 

	}

#ifdef GENERATE_ERRORS

inline void CSISExpression::CreateDefects ()

	{

	if (CSISFieldRoot::IsBugToBeCreated (CSISFieldRoot::EBugInvalidValues))

		{

		iOperator = rand ();

		}

	}

#endif // GENERATE_ERRORS

inline void CSISExpression::SetNumeric (const TInt32 aValue)

	{

	iOperator =	EPrimTypeNumber;

	iInteger = aValue;	

	}

inline std::string CSISExpression::Name () const

	{

	return "Expression";

	}

inline CSISUInt32 CSISExpression::Operator() const

	{

	return iOperator;

	}

inline const CSISString& CSISExpression::String() const

	{

	return iString;

	}

inline TInt CSISExpression::IntValue() const

	{

	return iInteger;

	}

#endif // __SISEXPRESSION_H__