// Copyright (c) 2003-2009 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 "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members

// which accompanies this distribution, and is available

// at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// $Revision: 1.1 $

// 

//

#ifndef _ZIP_ARCHIVE_H_

#define _ZIP_ARCHIVE_H_

#include "localtypes.h"

/**

This class represents a zip archive

@publishedAll

@released

*/

class CZipArchive: public CBase

	{

public:

    enum 

		{	

		KZipArchiveError 					= -256,

	    KCentralDirectoryTrailerNotFound	= KZipArchiveError - 1,

	    KCentralDirectoryTrailerInvalid		= KZipArchiveError - 3,

	    KCompressionMethodNotSupported		= KZipArchiveError - 4,

	    KLocalHeaderSignatureInvalid		= KZipArchiveError - 5,

	    KMultiDiskArchivesNotSupported		= KZipArchiveError - 6,

		KMemberNotFound						= KZipArchiveError - 7,

		KZipArchiveMinError					= KZipArchiveError - 8

		};

    enum TCompressionMethod 

		{

		EStored 		= 0,

		EShrunk 		= 1,

		EReducedCFOne	= 2,

		EReducedCFTwo	= 3,

		EReducedCFThree	= 4,

		EReducedCFFour	= 5,

		EImploded		= 6,

		EReservedOne	= 7,

		EDeflated		= 8,

		EReservedTwo	= 9,

		EPKWAREImploded	= 10

		};

protected:

    enum // Constants 

		{

        KCentralDirectorySignature  		= 0x06054b50,

    	KCentralDirectoryHeaderSignature	= 0x02014b50,

    	KLocalHeaderSignature   			= 0x04034b50

		};

	enum // Lengths 

		{

		KCentralDirectoryTrailerFixedLength = 22,

		KLocalHeaderFixedLength             = 30,

		KCentralDirectoryHeaderFixedLength	= 46,

		KSignatureLength                    =  4,

		KMaxTrailerSearchLength             = 65536

		};

	enum // Offsets 

		{

		KCentralFileHeaderFileNameLengthOffset   = 28,

		KCentralFileHeaderExtraFieldLengthOffset = 30,

		KCentralFileHeaderFileNameOffset         = 46

		};

	/**

	Represents the archive's central directory trailer - the central directory contains information

	about files in the arhive

	@publishedAll

	@released

	*/

    struct TCentralDirectoryTrailer 

		{

        TUint32 iSignature;

		TUint16 iDiskNumber;

		TUint16 iStartDiskNumber;

		TUint16 iLocalEntryCount;

		TUint16 iTotalEntryCount;

		TUint32 iSize;

		TUint32 iOffset;

		TUint16 iCommentLength;

		// comment -- variable length

		};

	/**

	Represents the archive's central directory header - the central directory contains information

	about files in the arhive

	@publishedAll

	@released

	*/

	struct TCentralDirectoryHeader 

		{

		TUint32 iSignature;

		TUint16 iMadeBy;

		TUint16 iRequired;

		TUint16 iFlags;

		TUint16 iCompressionMethod;

		TUint16 iLastModifiedFileTime;

		TUint16 iLastModifiedFileDate;

		TUint32 iCRC32;

		TUint32 iCompressedSize;

		TUint32 iUncompressedSize;

		TUint16 iFileNameLength;

		TUint16 iExtraFieldLength;

		TUint16 iFileCommentLength;

		TUint16 iDiskNumberStart;

		TUint16 iInternalFileAttributes;

		TUint32 iExternalFileAttributes;

		TUint32 iLocalHeaderOffset;

		// file name    -- variable length 

		// extra field  -- variable length

		// file comment -- variable length

		};

	/**

	Represents the archive's local header

	@publishedAll

	@released

	*/

	struct TLocalHeader 

		{

		TUint32 iSignature;

		TUint16 iVersionNeeded;

		TUint16 iFlags;

		TUint16 iCompressionMethod;

		TUint16 iLastModifiedFileTime;

		TUint16 iLastModifiedFileDate;

		TUint32 iCRC32;

		TUint32 iCompressedSize;

		TUint32 iUncompressedSize;

		TUint16 iFileNameLength;

		TUint16 iExtraFieldLength;

		// file name    -- variable length 

		// extra field  -- variable length

		};

	};

#endif /* !_ZIP_ARCHIVE_H_ */