cihx2chxdataf.h

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
 *      
 * The contents of this file, and the files included with this file, are 
 * subject to the current version of the RealNetworks Public Source License 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the RealNetworks Community Source License Version 1.0 
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
 * in which case the RCSL will apply. You may also obtain the license terms 
 * directly from RealNetworks.  You may not use this file except in 
 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 
 * applicable to this file, the RCSL.  Please see the applicable RPSL or 
 * RCSL for the rights, obligations and limitations governing use of the 
 * contents of the file.  
 *  
 * This file is part of the Helix DNA Technology. RealNetworks is the 
 * developer of the Original Code and owns the copyrights in the portions 
 * it created. 
 *  
 * This file, and the files included with this file, is distributed and made 
 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS 
 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * 
 * Technology Compatibility Kit Test Suite(s) Location: 
 *    http://www.helixcommunity.org/content/tck 
 * 
 * Contributor(s): 
 *  
 * ***** END LICENSE BLOCK ***** */ 

#ifndef _CIHX2CHX_H_
#define	_CIHX2CHX_H_

/************************************************************************
 *  Includes
 */
#include "hxcom.h"
#include "hxdataf.h"

class CHXDataFile;


/************************************************************************
 *  CIHX2CHXDataFile
 */
class CIHX2CHXDataFile : public IHXDataFile
{
public:
	/*
	 *  Constructor
	 */
	CIHX2CHXDataFile(UINT32 ulFlags = 0, IUnknown** ppCommonObj = NULL);

	/*
	 *  IHXDataFile methods
	 */
	/* Bind DataFile Object with FileName */
	STDMETHOD_(void, Bind)		(THIS_
					const char* FileName);
	
	/* Creates a datafile using the specified mode
	 * uOpenMode --- File Open mode - HX_FILE_READ/HX_FILE_WRITE/HX_FILE_BINARY
	 */
	STDMETHOD(Create)		(THIS_
					UINT16 uOpenMode);
	
	/* Open will open a file with the specified mode
	 */
	STDMETHOD(Open)			(THIS_
					UINT16 uOpenMode);
	
	/* Close closes a file 
	 * If the reference count on the IHXDataFile object is greater than 1, 
	 * then the underlying file cannot be safely closed, so Close() becomes 
	 * a noop in that case. Close it only when the object is destroyed. 
	 * This would be safe, but could lead to a file descriptor leak.
	 */
	STDMETHOD(Close)		(THIS);
	
	/* Name returns the currently bound file name in FileName.
	 * and returns TRUE, if the a name has been bound.  Otherwise
	 * FALSE is returned.
	 */
	STDMETHOD_(BOOL, Name)		(THIS_
					REF(IHXBuffer*) pFileName);
	
	/*
	 * IsOpen returns TRUE if file is open.  Otherwise FALSE.
	 */
	STDMETHOD_(BOOL, IsOpen)		(THIS);
	
	/* Seek moves the current file position to the offset from the
	 * fromWhere specifier returns current position of file or -1 on
	 * error.
	 */
	STDMETHOD(Seek)				(THIS_
						ULONG32 offset, UINT16 fromWhere);
	
	/* Tell returns the current file position in the file */
	STDMETHOD_(ULONG32, Tell)		(THIS);
	
	/* Read reads up to count bytes of data into buf.
	 * returns the number of bytes read, EOF, or -1 if the read failed 
	 */
	STDMETHOD_(ULONG32, Read)		(THIS_
						REF(IHXBuffer*) pBuf, 
						ULONG32 count);
	
	/* Write writes up to count bytes of data from buf.
	 * returns the number of bytes written, or -1 if the write failed 
	 */
	STDMETHOD_(ULONG32, Write)		(THIS_
						REF(IHXBuffer*) pBuf); 
	
	/* Flush out the data in case of buffered I/O
	 */
	STDMETHOD(Flush)			(THIS);
	
	/*
	 * Return info about the data file such as permissions, time of creation
	 * size in bytes, etc.
	 */
	STDMETHOD(Stat)				(THIS_
						struct stat* buffer);
	
	/* Delete File */
	STDMETHOD(Delete)			(THIS);
	
	/* Return the file descriptor */
	STDMETHOD_(INT16, GetFd)		(THIS);
	
	/* GetLastError returns the platform specific file error */
	STDMETHOD(GetLastError)			(THIS);
	
	/* GetLastError returns the platform specific file error in
	 * string form.
	 */
	STDMETHOD_(void, GetLastError)		(THIS_
						REF(IHXBuffer*) err);


	/*
	 *  CIHX2CHXDataFile methods
	 */
	CHXDataFile* GetCHXDataFile(void)	{ return m_pCHXFile; }

	/*
	 *  IUnknown methods
	 */
	STDMETHOD(QueryInterface)		(THIS_
						REFIID riid,
						void** ppvObj);
	
	STDMETHOD_(ULONG32, AddRef)		(THIS);
	
	STDMETHOD_(ULONG32, Release)		(THIS);

private:
	/*
	 *  Destructor
	 */
	virtual ~CIHX2CHXDataFile(void);

	/*
	 *  Private methods
	 */
	inline UINT16 TranslateMode(UINT16 uOpenMode);

	CHXDataFile* m_pCHXFile;
	IHXBuffer* m_pFileName;
	BOOL m_bOpen;

	LONG32 m_lRefCount;

	PRIVATE_DESTRUCTORS_ARE_NOT_A_CRIME
};
	
#endif // _CHXDATAFILE_H_