// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "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:

//

#include "messagedefparser\constprocessor.h"

#include "messagedefparser\initialstate.h"

#include "messagedefparser\definitiontokenizer.h"

#include "util.h"

namespace Parser

{

void CConstProcessor::ProcessState()

    {

    Tokens::TTokenType tokenType = CurrentTokenType();

    iResult = Parser::EUnexpectedToken;

    switch (iInternalState)

        {

        case EStateExpectConstIdentifier:

            // Expect an identifier for the new const

            if (tokenType == Tokens::EIdentifier)

                {

                CreateTempConst();

                }

            break;

        case EStateExpectEquals:

            if (tokenType == Tokens::EEquals)

                {

                iInternalState = EStateExpectValue;

                iResult = Parser::ENoError;

                }

            break;

        case EStateExpectValue:

            {

            // Expect a value formatted as decimal or hex

            if (tokenType == Tokens::ENumberHex)

                {

                iIdentifier->iValue = HexToVal(CurrentToken());

                CommitConst();

                }

            else if (tokenType == Tokens::ENumberDec)

                {

                iIdentifier->iValue = atol(CurrentToken());

                CommitConst();

                }

            break;

            }

        }

    if (iResult != Parser::ENoError)

        {

        ParserSM().SetError(iResult);

        }

    }

void CConstProcessor::CreateTempConst()

    {

    if (!ParserSM().FindIdentifier(CurrentToken()))

        {

        iIdentifier = new CConstIdentifier(CurrentToken());

        iInternalState = EStateExpectEquals;

        iResult = Parser::ENoError;

        }

    else

        {

        iResult = Parser::EDuplicateIdentifier;

        }

    }

void CConstProcessor::CommitConst()

    {

    ParserSM().AddIdentifier(iIdentifier);

    iIdentifier = NULL;

    ParserSM().SetState(new CInitialState(ParserSM()));

    iResult = Parser::ENoError;

    }

} // namespace Parser