/*

* Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* 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: 

*    

*

*/

#ifndef C_STATE_MACHINE_H

#define C_STATE_MACHINE_H

#include "NumberGroupingStd.h"

NONSHARABLE_CLASS(CStateMachine) : public CBase

{

public:

	static CStateMachine*	NewL(TInt aMaxNumberChars, TInt aMaxNumberStates);

	static CStateMachine*	NewLC(TInt aMaxNumberChars, TInt aMaxNumberStates);

	virtual ~CStateMachine();

	void			AddStateTransistionL(TChar aChar, TInt aState, TInt aNextState);

	void			AddStateTransistionL(TInt aDigit, TInt aState, TInt aNextState);

	TBool			Matches(const TDesC& aString);

    /**

    * This routine writes into a client supplied descriptor a string that is a wildcard version

    * of the pattern match for this state machine.  It writes characters into the supplied descriptor

    * to a length of the maximum number of characters to match. 

    * For each character index, if there is only one possible valid character, it puts in that 

    * character.  If there are more than one, then the supplied aWildcardChar is written in.

    * The character '.' in the state machine is not treated as a single character, but as a range,

    * and so the wildcard character is written in for the '.'.

    * 

    * aWildcardPattern must have MaxLength which is equal or greater than iMaxNumberStates

    * 

    * @param    aWildcardChar   The character to put in aExamplePattern if there is no single 

    *                           valid character at that point

    * @param    aWildcardedPattern Descriptor to write the wildcarded number pattern into

    */

    void            GetWildcardVersionOfPattern( 

        TText aWildcardChar, 

        TDes& aWildcardedPattern ) const;

private:

	CStateMachine(TInt aMaxNumberChars, TInt aMaxNumberStates);

	void			ConstructL();

	virtual TInt	MapIndex(TChar aChar, RArray<TInt>& aIndices);

	TInt**			iStateTable;

	TInt			iMaxNumberChars;

	TInt			iMaxNumberStates;

};

#endif // C_STATE_MACHINE_H

// End of File