minifilesys.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 _MINIFILESYS_H_
#define _MINIFILESYS_H_


/****************************************************************************
 * Includes
 */
#include "hlxclib/stdio.h" /* FILE */
#include "hlxclib/io.h" /* struct _finddata_t, etc. */
#include "hxplugn.h"  /* IHXPlugin */
#include "hxfiles.h"  /* IHXFileSystemObject */
#include "baseobj.h"  /* IHXFileSystemObject */


/****************************************************************************
 * Constants
 */
#define FILE_SYS_PROTOCOL "file"

/****************************************************************************
 *
 *  CHXMiniFileSystem Class
 *
 *  This class inherits the interfaces required to create a File System
 *  plug-in. The IHXFileSystemObject interface contains methods for
 *  initializing the File System object, and creating the File Object which
 *  handles the actual low level file access. All plug-ins also require the
 *  IHXPlugin interface in order to handle fundamental plug-in operations.
 *  Since this is also a COM object, this class also inherits COM's IUnknown
 *  interface to handle reference counting and interface query.
 */
class CHXMiniFileSystem :  public IHXFileSystemObject,
			   public IHXPlugin,
			   public CHXBaseCountingObject
{
public:
    CHXMiniFileSystem(void);
    ~CHXMiniFileSystem(void);

    /************************************************************************
     *  IHXFileSystemObject Interface Methods
     */
    STDMETHOD(GetFileSystemInfo)(THIS_ REF(const char*) pShortName,
				 REF(const char*) pProtocol);
    STDMETHOD(InitFileSystem) (THIS_ IHXValues* pOptions);
    STDMETHOD(CreateFile    ) (THIS_ IUnknown** ppFileObject);
    STDMETHOD(CreateDir     ) (THIS_ IUnknown**	ppDirObject);


    /************************************************************************
     *  IHXPlugin Interface Methods
     */
    STDMETHOD(GetPluginInfo)(THIS_ REF(BOOL)  bLoadMultiple,
			     REF(const char*) pDescription,
			     REF(const char*) pCopyright,
			     REF(const char*) pMoreInfoURL,
			     REF(UINT32)      versionNumber);
    STDMETHOD(InitPlugin) (THIS_ IUnknown* pContext);


    /************************************************************************
     *  IUnknown COM Interface Methods
     */
    STDMETHOD (QueryInterface ) (THIS_ REFIID ID, void** ppInterfaceObj);
    STDMETHOD_(UINT32, AddRef ) (THIS);
    STDMETHOD_(UINT32, Release) (THIS);


private:
    /****** Private Class Variables ****************************************/
    INT32                    m_RefCount;       // Object's reference count
    IHXCommonClassFactory*   m_pClassFactory;  // Creates common Helix classes
    char*                    m_pBasePath;      // Platform's root path
    
    /****** Private Static Class Variables *********************************/
    static const char* const zm_pDescription;
    static const char* const zm_pCopyright;
    static const char* const zm_pMoreInfoURL;
    static const char* const zm_pShortName;
    static const char* const zm_pProtocol;
};

#endif  /* _MINIFILESYS_H_ */