sl@0: // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: 
sl@0: #ifndef _ZIP_FILE_MEMBER_INPUT_STREAM_H_
sl@0: #define _ZIP_FILE_MEMBER_INPUT_STREAM_H_
sl@0: 
sl@0: #include <zlib.h>
sl@0: #include <localtypes.h>
sl@0: #include <s32file.h>
sl@0: 
sl@0: class CZipFile;
sl@0: 
sl@0: /**
sl@0: A RZipFileMemberReaderStream represents a input stream for compressed files in the archive. 
sl@0: This is a friend class to CZipFile. In order to create a input stream for a file in the archive,
sl@0: CZipFile will call its member function GetInputStreamL() by passing a pointer to 
sl@0: RZipFileMemberReaderStream and the function will return the input stream for the file
sl@0: Note: This class is actually a C class as it derives from CBase
sl@0: 
sl@0: @publishedAll
sl@0: @released
sl@0: */
sl@0: class RZipFileMemberReaderStream : public CBase
sl@0: 	{
sl@0: friend class CZipFile;
sl@0: 
sl@0: public:
sl@0: 	
sl@0: 	IMPORT_C ~RZipFileMemberReaderStream();
sl@0: 	IMPORT_C TInt Read(TDes16& aDes, TInt aLength);
sl@0: 	
sl@0: 	/**
sl@0: 	Overload version of the RZipFileMemberReaderStream read method.
sl@0: 	On return, contains the data read from the stream buffer.
sl@0: 	
sl@0: 	@param aDes The target descriptor for the data read from the stream buffer
sl@0: 	@param aLength The maximum number of bytes to be read
sl@0: 	@return KErrNone If all bytes read successfully.
sl@0: 	@return	KErrCorrupt If reading fails.
sl@0: 	@return KErrEof If end of file is reached.
sl@0: 	@return ... Any one of the system-wide error codes for other errors.
sl@0: 	*/	
sl@0: 	virtual TInt Read(TDes8& aDes, TInt aLength);
sl@0: 	
sl@0: 	/**
sl@0: 	Overload version of the RZipFileMemberReaderStream readL method.
sl@0: 	On return, contains the data read from the stream buffer.
sl@0: 	
sl@0: 	@param aDes The target descriptor for the data read from the stream buffer
sl@0: 	@param aLength The maximum number of bytes to be read
sl@0: 	@leave KErrNone If all bytes read successfully.
sl@0: 	@leave KErrCorrupt If reading fails.
sl@0: 	@leave KErrEof If end of file is reached.
sl@0: 	@leave ... Any one of the system-wide error codes for other errors.
sl@0: 	*/
sl@0: 	virtual void ReadL(TDes16& aDes, TInt aLength);
sl@0: 
sl@0: 
sl@0: 	void Release();
sl@0: 	void Close();
sl@0: 
sl@0: private:
sl@0: 	RZipFileMemberReaderStream(CZipFile&, TUint32, TUint32, TUint32, TUint32);
sl@0: 	
sl@0: 	static RZipFileMemberReaderStream* NewL(CZipFile&, TUint32, TUint32, TUint32, TUint32);
sl@0: 	void RZipFileMemberReaderStream::ConstructL();
sl@0: 	
sl@0: 	virtual TInt Read(void);
sl@0: 	virtual TInt Read(TByte*, TUint32, TUint32*);
sl@0: 
sl@0: 	TInt GetBytes(TByte*, TUint32, TUint32*);
sl@0: 	TInt GetCompressedBytes(void);
sl@0: 	TInt GetStoredBytes(TByte*, TUint32, TUint32*);
sl@0: 	
sl@0: 	void ReadL(TDes8&);
sl@0: 	void ReadL(TDes16&);
sl@0: 	void ReadL(TDes8&, TChar);
sl@0: 	void ReadL(TDes16&, TChar);
sl@0: 	void ReadL(TUint8*, TInt);
sl@0: 	void ReadL(TUint16*, TInt);
sl@0: 	void ReadL(RWriteStream&);
sl@0: 	void ReadL(RWriteStream&, TInt);
sl@0: 	void ReadL(TInt);
sl@0: 
sl@0: 	TInt8 ReadInt8L();
sl@0: 	TInt16 ReadInt16L();
sl@0: 	TInt32 ReadInt32L();
sl@0: 	TUint8 ReadUint8L();
sl@0: 	TUint16 ReadUint16L();
sl@0: 	TUint32 ReadUint32L();
sl@0: 
sl@0: 	TReal32 ReadReal32L() __SOFTFP;
sl@0: 	TReal64 ReadReal64L() __SOFTFP;
sl@0: 
sl@0: 	void PushL();
sl@0: 	void Pop();
sl@0: 	void Attach(MStreamBuf*);
sl@0: 	void Detach();
sl@0: 	MStreamBuf* Source();
sl@0: 
sl@0: 
sl@0: private:
sl@0: 
sl@0: 	enum
sl@0: 		{
sl@0: 		kCompressedBytesSize = 1024
sl@0: 		};
sl@0: 		
sl@0: private:
sl@0: 	
sl@0: 	CZipFile& 	iZipFile;
sl@0: 	
sl@0: 	/** The method for compressing file*/ 
sl@0: 	TUint32   	iCompressionMethod;
sl@0: 	
sl@0: 	z_stream  	iStream;
sl@0: 	
sl@0: 	/** The size of compressed file */
sl@0: 	TUint32     iCompressedSize;
sl@0: 	
sl@0: 	/** The size of uncompressed file */
sl@0: 	TUint32     iUncompressedSize;
sl@0: 	
sl@0: 	TUint32     iFileOffset;
sl@0: 	TUint32     iOffset;
sl@0: 	TBool       iDone;
sl@0: 	
sl@0: 	/** The number of bytes already read in uncompressed bytes*/
sl@0: 	TUint32     iBytesLength;
sl@0: 	
sl@0: 	/** To store compressed bytes read*/
sl@0: 	TByte       iCompressedBytes[kCompressedBytesSize];
sl@0: 	
sl@0: 	/** Not used in implementation*/
sl@0: 	TUint32     iCompressedBytesOffset;
sl@0: 	};
sl@0: 
sl@0: 	
sl@0: #endif /* !_ZIP_FILE_MEMBER_INPUT_STREAM_H_ */
sl@0: