secureswitools/swisistools/source/interpretsislib/expressionevaluator.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 11 May 2010 16:20:28 +0300
branchRCL_3
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/*
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* Copyright (c) 2006-2010 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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*
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*/
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#ifndef	EXPRESSIONEVALUATOR_H
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#define	EXPRESSIONEVALUATOR_H
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#include "sisfile.h"
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#include "sisregistry.h"
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#include "errors.h"
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#include "sisexpression.h"
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// Classes referenced
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class RomManager;
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class ConfigManager;
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// Max recursion depth
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const static int KMaxExpressionDepth=100;
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/** 
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* @file EXPRESSIONEVALUATOR.H
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*
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* @internalComponent
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* @released
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*/
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class ExpressionEnvironment
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	{
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public:
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	ExpressionEnvironment( const SisFile& aSisFile, 
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                           const SisRegistry& aRegistry,
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                           RomManager& aRomManager,
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                           ConfigManager& aConfigManager,
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                           const std::wstring& aCDrive );
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	/**
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	 * Check whether a file exists, corresponds to EXISTS() function in package
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	 * format.
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	 */
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	bool FindFile(const std::wstring& aFileName, bool aLogInfo = true);
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	/**
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	 * Queries an application property, which is a key,value pair associated 
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	 * with an isntalled package. This corresponds to APPPROP() function in
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	 * package format.
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	 */
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	TUint32 ApplicationProperty(TUint32 aPackageUid, TUint32 aKey);
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	/**
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	 * Queries the registry to check if a package exists or not.
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	 */
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	bool Package(TUint32 aKey);
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	int Variable( int aVariableId, bool aLogInfo = true );
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	const std::wstring GetPackageName();
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	/**
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	 * Queries the registry to determine whether the version of a specific
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	 * installed package satisfies the given relational condition 
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	 *
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	 * @param aArgsString	The argument string should contain the following
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	 *						comma seperated parameters:
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	 *
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	 *						-packageUid 			- 	UID of the package to check
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	 *						-relational Operator -	Comparision operator
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	 *						-vMajor				-	Major Version component
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	 *						-vMinor				-	Minor Version component
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	 *						-vBuild				-	Build Version component					
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	 *
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	 * @return				"TRUE" if the queried package version satisfies the
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	 *						condition, otherwise "FALSE".
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	 */
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	bool PackageVersion(const std::wstring& aArgsString);
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	/**
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	 * Check whether a languageID exists within the list device supported languages.
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	 *
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	 * @param aLanguageIdString	The Language Id to check for.
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	 * @return 					True if the language exists, False otherwise.
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	 */
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	bool DeviceLanguage(const std::wstring& aLanguageIdString);
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private:
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	const SisFile& iSisFile;
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	const SisRegistry& iSisRegistry;
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    RomManager& iRomManager;
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    ConfigManager& iConfigManager;
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	const std::wstring& iCDrive;
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	};
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/**
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Implements the ExpressionResult.
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@internalComponent
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*/
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class ExpressionResult
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	{
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public:
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	enum TType { EString, EInt };
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	ExpressionResult(const std::wstring& aString);
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	ExpressionResult(TUint32 aInt);
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	TUint32 IntegerValue() const;
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	bool BoolValue() const;
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	const std::wstring& StringValue() const;
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	TType Type() const { return iType; }
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private:
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	TType iType;
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	union
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		{
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		const std::wstring* iString;
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		TUint32 iInt;
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		};
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	};
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   142
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   143
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   145
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   146
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   149
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inline bool operator==( const ExpressionResult& aLhs, const ExpressionResult& aRhs )
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    {
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    bool result( false );
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    //
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	if  ( aLhs.Type() != aRhs.Type() )
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		{
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		std::string error = "corrupt SIS file: expression corrupt in condition statement";
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		throw InvalidSis("",error,INVALID_SIS);
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		}
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    else if ( aLhs.Type() == ExpressionResult::EInt )
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		{
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        result = ( aLhs.IntegerValue() == aRhs.IntegerValue() );
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		}
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	else
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		{
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        result = ( aLhs.StringValue() == aRhs.StringValue() );
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		}
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    //
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    return result;
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    }
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   171
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   172
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inline ExpressionResult operator!=( const ExpressionResult& aLhs, const ExpressionResult& aRhs )
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    {
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    bool equal = ( aLhs == aRhs );
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    const ExpressionResult result( !equal );
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    return result;
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    }
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inline ExpressionResult operator!( const ExpressionResult& aExpression )
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    {
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	if  ( aExpression.Type() != ExpressionResult::EInt )
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		{
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		std::string error = "corrupt SIS file: expression corrupt in condition statement";
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        throw InvalidSis("",error,INVALID_SIS);
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		}
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    //
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    return ExpressionResult(!aExpression.IntegerValue()); // Will Never Leave
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    }
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inline ExpressionResult operator<( const ExpressionResult& aLhs, const ExpressionResult& aRhs )
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    {
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	if  ( aLhs.Type() != aRhs.Type() || aLhs.Type() != ExpressionResult::EInt )
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		{
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		std::string error = "corrupt SIS file: expression corrupt in condition statement";
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		throw InvalidSis("",error,INVALID_SIS);
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		}
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    //
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    const ExpressionResult result( aLhs.IntegerValue() < aRhs.IntegerValue() );
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    return result;
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    }
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   205
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inline ExpressionResult operator>( const ExpressionResult& aLhs, const ExpressionResult& aRhs )
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    {
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	if  ( aLhs.Type() != aRhs.Type() || aLhs.Type() != ExpressionResult::EInt )
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		{
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		std::string error = "corrupt SIS file: expression corrupt in condition statement";
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		throw InvalidSis("",error,INVALID_SIS);
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		}
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    //
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    const ExpressionResult result( aLhs.IntegerValue() > aRhs.IntegerValue() );
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    return result;
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    }
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   217
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parents:
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   218
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inline ExpressionResult operator<=( const ExpressionResult& aLhs, const ExpressionResult& aRhs )
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    {
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	if  ( aLhs.Type() != aRhs.Type() || aLhs.Type() != ExpressionResult::EInt )
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		{
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		std::string error = "corrupt SIS file: expression corrupt in condition statement";
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		throw InvalidSis("",error,INVALID_SIS);
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		}
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    //
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    const ExpressionResult result( aLhs.IntegerValue() <= aRhs.IntegerValue() );
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    return result;
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    }
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inline ExpressionResult operator>=( const ExpressionResult& aLhs, const ExpressionResult& aRhs )
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    {
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	if  ( aLhs.Type() != aRhs.Type() || aLhs.Type() != ExpressionResult::EInt )
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		{
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		std::string error = "corrupt SIS file: expression corrupt in condition statement";
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		throw InvalidSis("",error,INVALID_SIS);
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		}
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    //
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    const ExpressionResult result( aLhs.IntegerValue() >= aRhs.IntegerValue() );
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    return result;
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    }
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/**
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Implements the ExpressionEvaluator.
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@internalComponent
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*/
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class ExpressionEvaluator
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	{
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public:
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	ExpressionEvaluator(ExpressionEnvironment& aEnvironment);
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	void SetFile(const SisFile& aSisFile);
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	void SetRegistry(const SisRegistry& aSisRegistry);
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34
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	ExpressionResult Evaluate(const CSISExpression& aExpression, bool aLogInfo = true);
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	ExpressionResult Evaluate(const CSISExpression* aExpression, bool aLogInfo = true);
0
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private:
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	void Require(const void *aPointer) const;
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private:
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	ExpressionEnvironment& iExpEnv;
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	int iExpressionDepth;
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	ExpressionResult iTempResult;
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	};
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#endif	/* EXPRESSIONEVALUATOR_H */