compressionlibs/ziplib/inc/zipfile.h
author hgs
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// Copyright (c) 2003-2009 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 "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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#ifndef _ZIP_FILE_H_
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#define _ZIP_FILE_H_
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#include <e32std.h>
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#include <s32file.h>
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#include <charconv.h>
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#include <localtypes.h>
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#include <ziparchive.h>
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#include <zipfilememberinputstream.h>
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#include <zipfilememberiterator.h>
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#include <zipfilemember.h>
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// Forward Class Declaration(s)
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class CFileInputStream;
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class CZipFileMemberIterator;
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class CZipFileMember;
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namespace ContentAccess
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	{
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	class CData;
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	}
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// End of Forward Class Declaration(s)
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/** 
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A CZipFile represents a ZIP archive contained in a single file. 
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Multi file zip archives are not supported.
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@publishedAll
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@released
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*/
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class CZipFile : public CZipArchive
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	{
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	friend class RZipFileMemberReaderStream;
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	friend class CZipFileMemberIterator;
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	public:
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		/**	ZipFile error enumeration.
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		*/
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		enum
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			{
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			/** Cannot read file directory in the archive file*/
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			KZipFileError 		= KZipArchiveMinError - 1,
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			/** File not found error. It is not used in current implemenation*/
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			KZipFileNotFound	= KZipFileError - 1,
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			/** File IO error.Any error occurs during a archive file is readed. 
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			For examples, any error about reading number of disk,
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			an offset of signature, or the content of file is non-readable.
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			*/
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			KZipFileIOError 	= KZipFileError - 2
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			};
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	public:
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		IMPORT_C static CZipFile* NewL(RFs& aFs, RFile& aFile);	
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		IMPORT_C static CZipFile* NewL(RFs& aFs, const TDesC& aFileName);
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		IMPORT_C CZipFile(RFs& aFs, const TDesC& aFileName);
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		IMPORT_C TInt OpenL(void);
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		IMPORT_C void Close(void);
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		IMPORT_C virtual ~CZipFile();
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	protected:
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		IMPORT_C void ConstructL(const TDesC& aFileName);
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		IMPORT_C void ConstructL(RFile& aFile);
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	public:
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		IMPORT_C TInt Size(TInt& aSize) const;
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		IMPORT_C CZipFileMember* MemberL(const TDesC& aName);
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		IMPORT_C CZipFileMember* CaseInsensitiveMemberL(const TDesC& aName);
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		IMPORT_C CZipFileMember* CaseSensitiveOrCaseInsensitiveMemberL(const TDesC& aName);
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		IMPORT_C TInt GetInputStreamL(const CZipFileMember* aMember, RZipFileMemberReaderStream*& aStream);
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  		IMPORT_C CZipFileMemberIterator* GetMembersL(void);
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protected:
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	/** 
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	Internal representation of a compressed file in a zipfile
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	@publishedAll
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	@released
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	*/
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	struct TMemberPointer
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		{
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		/** the name of a compressed file*/
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		TFileName*  iName;
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		/** Not used in current implementation*/
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		TUint32		iCentralHeaderOffset;
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		/** The local offset of header in a compressed file*/
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		TUint32	iLocalHeaderOffset;
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		/** CRC with 32 bits length in a compressed file*/
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		TUint32 iCRC32;
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		/** The size of compressed file */	
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		TUint32	iCompressedSize;
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		/** The size of file without compressed*/
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		TUint32	iUncompressedSize;
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		};
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protected:
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	TInt FindCentralDirectoryTrailer(TUint32& offset);
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    TInt ReadCentralDirectoryTrailer(TUint32 offset, TCentralDirectoryTrailer&);
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    TInt ReadCentralDirectoryHeaderL(TCentralDirectoryHeader&, TMemberPointer&,
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    	CCnvCharacterSetConverter* aConverter, TInt aConverterState);
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	TInt ReadLocalHeader(TUint32, TLocalHeader&);
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	const TMemberPointer* FindMemberPointer(const TDesC&, TBool);
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    TInt LoadMemberPointersL(void);
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	RZipFileMemberReaderStream*   MakeInputStreamL(TUint32, TUint32, TUint32, TUint32);
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    CZipFileMember* MakeMemberL(TInt);
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    CZipFileMember* MakeMemberL(const TMemberPointer&, const TLocalHeader&);
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    // File I/O Support
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    void OpenFileL(const TDesC& aFileName);
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    TInt Read(TByte*, TUint32);
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    TInt Read(TUint16&);
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    TInt Read(TUint32&);
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    TInt Seek(TInt);
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	// Misc
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	void DeleteMemberPointers(void);
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private:
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    const TDesC&				iFileName;
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    TUint32 iFileLength;
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	/** The central directory of ZIP File Trailer*/
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	TCentralDirectoryTrailer iTrailer;
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	/** The pointer to a a compressed file in a zipfile*/
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	TMemberPointer*	iMemberPointers;
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	RFs& iFs;
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	/** The pointer to CData object created from a zip file*/
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	ContentAccess::CData* iData;
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	};
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#endif /* !_ZIP_FILE_H_ */