/*

* Copyright (c) 2002 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: 

*      Declaration of class TCodParser.   

*      

*

*/

#ifndef COD_PARSER_H

#define COD_PARSER_H

// INCLUDES

#include <e32base.h>

// FORWARD DECLARATION

class CMediaObjectData;

class CCodData;

// CLASS DECLARATION

/**

* COD Parser.

*/

NONSHARABLE_CLASS( TCodParser )

    {

    public:     // constructor

        /**

        * Constructor.

        */

        inline TCodParser();

    public:     // new methods

        /**

        * Parse the buffer into aData. Existing data in aData is lost.

        * Leaves on failure; leave code can be KErrCodInvalidDescriptor as well

        * as general errors. The resulting data is not checked semantically

        * (i.e. mandatory attributes may be missing).

        * @param aBuf COD content buffer to be parsed.

        * @param aData COD will be parsed into this.

        */

        void ParseL( const TDesC& aBuf, CCodData& aData );

    private:    // types

        enum TCodAttr               ///< COD Attributes.

            {

            ECodName,               ///< COD-Name.

            ECodVendor,             ///< COD-Vendor.

            ECodDescription,        ///< COD-Description.

            ECodUrl,                ///< COD-URL.

            ECodSize,               ///< COD-Size.

            ECodType,               ///< COD-Type.

            ECodInstallNotify,      ///< COD-Install-Notify.

            ECodNextUrl,            ///< COD-Netx-URL.

            ECodNextUrlAtError,     ///< COD-Next-URLatError.

            ECodInfoUrl,            ///< COD-Info-URL.

            ECodPrice,              ///< COD-Price.

            ECodIcon,               ///< COD-Icon.

            ECodUnknownAttr         ///< Future COD attributes.

            };

    private:    // parsing

        /**

        * Parse one line.

        * @return ETrue if more lines to go, EFalse if done.

        */

        TBool AttrLineL(CMediaObjectData *& aMediaObject);

        /**

        * Parse an attribute name. Empty token sets error.

        * @return Attribute name type.

        */

        TCodAttr AttrName();

        /**

        * Parse an attribute value.

        * @return pointer to the value.

        */

        TPtrC AttrValue();

        /**

        * Skip (optional) white space.

        */

        void SkipWhiteSpace();

        /**

        * Skip past the end of current line (ignoring anything).

        */

        void NextLine();

        /**

        * Parse *WS until ?CR LF. Set error if something else found.

        * (Advance to LF, leaving the LF as lookahead char).

        */

        void EndOfLine();

        /**

        * Parse *WS : *WS. Set error if no colon found.

        * @return ETrue if colon found.

        */

        TBool Colon();

        /**

        * Check if current character is value char.

        * @return ETrue if current character is value char.

        */

        TBool IsValueChar() const;

        /**

        * Check if current character is control char.

        * @return ETrue if current character is control char.

        */

        TBool IsControl() const;

        /**

        * Check if current character is white space.

        * @return ETrue if current character is white space.

        */

        TBool IsWhiteSpace() const;

        /**

        * Check if current character is separator.

        * @return ETrue if current character is separator.

        */

        TBool IsSeparator() const;

        /**

        * Check if current character is CR LF or LF.

        * @return ETrue if current character is CR LF or LF.

        */

        TBool IsEndOfLine() const;

        /**

        * Set error code if not already set.

        * @param aError Error.

        */

        inline void Error( TInt aError );

    private:    // data

        const TDesC* iBuf;      ///< Data buffer. Not owned.

        CCodData* iData;        ///< COD Data. Not owned.

        const TText* iCurP;     ///< Current character position.

        const TText* iEndP;     ///< End pointer (past the buffer);

        TInt iError;            ///< Error code.

    };

#include "CodParser.inl"

#endif /* def COD_PARSER_H */