williamr@2: // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
williamr@2: // All rights reserved.
williamr@2: // This component and the accompanying materials are made available
williamr@4: // under the terms of "Eclipse Public License v1.0"
williamr@2: // which accompanies this distribution, and is available
williamr@4: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
williamr@2: //
williamr@2: // Initial Contributors:
williamr@2: // Nokia Corporation - initial contribution.
williamr@2: //
williamr@2: // Contributors:
williamr@2: //
williamr@2: // Description:
williamr@2: //
williamr@2: 
williamr@4: 
williamr@2: #ifndef _ZIP_FILE_MEMBER_INPUT_STREAM_H_
williamr@2: #define _ZIP_FILE_MEMBER_INPUT_STREAM_H_
williamr@2: 
williamr@4: #include <zlib.h>
williamr@4: #include <localtypes.h>
williamr@2: #include <s32file.h>
williamr@2: 
williamr@2: class CZipFile;
williamr@2: 
williamr@2: /**
williamr@2: A RZipFileMemberReaderStream represents a input stream for compressed files in the archive. 
williamr@2: This is a friend class to CZipFile. In order to create a input stream for a file in the archive,
williamr@2: CZipFile will call its member function GetInputStreamL() by passing a pointer to 
williamr@2: RZipFileMemberReaderStream and the function will return the input stream for the file
williamr@2: Note: This class is actually a C class as it derives from CBase
williamr@2: 
williamr@2: @publishedAll
williamr@2: @released
williamr@2: */
williamr@2: class RZipFileMemberReaderStream : public CBase
williamr@2: 	{
williamr@2: friend class CZipFile;
williamr@2: 
williamr@2: public:
williamr@2: 	
williamr@2: 	IMPORT_C ~RZipFileMemberReaderStream();
williamr@2: 	IMPORT_C TInt Read(TDes16& aDes, TInt aLength);
williamr@2: 	
williamr@2: 	/**
williamr@2: 	Overload version of the RZipFileMemberReaderStream read method.
williamr@2: 	On return, contains the data read from the stream buffer.
williamr@2: 	
williamr@2: 	@param aDes The target descriptor for the data read from the stream buffer
williamr@2: 	@param aLength The maximum number of bytes to be read
williamr@2: 	@return KErrNone If all bytes read successfully.
williamr@2: 	@return	KErrCorrupt If reading fails.
williamr@2: 	@return KErrEof If end of file is reached.
williamr@2: 	@return ... Any one of the system-wide error codes for other errors.
williamr@2: 	*/	
williamr@2: 	virtual TInt Read(TDes8& aDes, TInt aLength);
williamr@2: 	
williamr@2: 	/**
williamr@2: 	Overload version of the RZipFileMemberReaderStream readL method.
williamr@2: 	On return, contains the data read from the stream buffer.
williamr@2: 	
williamr@2: 	@param aDes The target descriptor for the data read from the stream buffer
williamr@2: 	@param aLength The maximum number of bytes to be read
williamr@2: 	@leave KErrNone If all bytes read successfully.
williamr@2: 	@leave KErrCorrupt If reading fails.
williamr@2: 	@leave KErrEof If end of file is reached.
williamr@2: 	@leave ... Any one of the system-wide error codes for other errors.
williamr@2: 	*/
williamr@2: 	virtual void ReadL(TDes16& aDes, TInt aLength);
williamr@2: 
williamr@2: 
williamr@2: 	void Release();
williamr@2: 	void Close();
williamr@2: 
williamr@2: private:
williamr@2: 	RZipFileMemberReaderStream(CZipFile&, TUint32, TUint32, TUint32, TUint32);
williamr@2: 	
williamr@2: 	static RZipFileMemberReaderStream* NewL(CZipFile&, TUint32, TUint32, TUint32, TUint32);
williamr@2: 	void RZipFileMemberReaderStream::ConstructL();
williamr@2: 	
williamr@2: 	virtual TInt Read(void);
williamr@2: 	virtual TInt Read(TByte*, TUint32, TUint32*);
williamr@2: 
williamr@2: 	TInt GetBytes(TByte*, TUint32, TUint32*);
williamr@2: 	TInt GetCompressedBytes(void);
williamr@2: 	TInt GetStoredBytes(TByte*, TUint32, TUint32*);
williamr@2: 	
williamr@2: 	void ReadL(TDes8&);
williamr@2: 	void ReadL(TDes16&);
williamr@2: 	void ReadL(TDes8&, TChar);
williamr@2: 	void ReadL(TDes16&, TChar);
williamr@2: 	void ReadL(TUint8*, TInt);
williamr@2: 	void ReadL(TUint16*, TInt);
williamr@2: 	void ReadL(RWriteStream&);
williamr@2: 	void ReadL(RWriteStream&, TInt);
williamr@2: 	void ReadL(TInt);
williamr@2: 
williamr@2: 	TInt8 ReadInt8L();
williamr@2: 	TInt16 ReadInt16L();
williamr@2: 	TInt32 ReadInt32L();
williamr@2: 	TUint8 ReadUint8L();
williamr@2: 	TUint16 ReadUint16L();
williamr@2: 	TUint32 ReadUint32L();
williamr@2: 
williamr@2: 	TReal32 ReadReal32L() __SOFTFP;
williamr@2: 	TReal64 ReadReal64L() __SOFTFP;
williamr@2: 
williamr@2: 	void PushL();
williamr@2: 	void Pop();
williamr@2: 	void Attach(MStreamBuf*);
williamr@2: 	void Detach();
williamr@2: 	MStreamBuf* Source();
williamr@2: 
williamr@2: 
williamr@2: private:
williamr@2: 
williamr@2: 	enum
williamr@2: 		{
williamr@2: 		kCompressedBytesSize = 1024
williamr@2: 		};
williamr@2: 		
williamr@2: private:
williamr@2: 	
williamr@2: 	CZipFile& 	iZipFile;
williamr@2: 	
williamr@2: 	/** The method for compressing file*/ 
williamr@2: 	TUint32   	iCompressionMethod;
williamr@2: 	
williamr@2: 	z_stream  	iStream;
williamr@2: 	
williamr@2: 	/** The size of compressed file */
williamr@2: 	TUint32     iCompressedSize;
williamr@2: 	
williamr@2: 	/** The size of uncompressed file */
williamr@2: 	TUint32     iUncompressedSize;
williamr@2: 	
williamr@2: 	TUint32     iFileOffset;
williamr@2: 	TUint32     iOffset;
williamr@2: 	TBool       iDone;
williamr@2: 	
williamr@2: 	/** The number of bytes already read in uncompressed bytes*/
williamr@2: 	TUint32     iBytesLength;
williamr@2: 	
williamr@2: 	/** To store compressed bytes read*/
williamr@2: 	TByte       iCompressedBytes[kCompressedBytesSize];
williamr@2: 	
williamr@2: 	/** Not used in implementation*/
williamr@2: 	TUint32     iCompressedBytesOffset;
williamr@2: 	};
williamr@2: 
williamr@2: 	
williamr@2: #endif /* !_ZIP_FILE_MEMBER_INPUT_STREAM_H_ */
williamr@4: