minifileobj.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 _MINIFILEOBJ_H_
#define _MINIFILEOBJ_H_


/****************************************************************************
 * Includes
 */
#include "hxfiles.h"  /* IHXFileObject, IHXRequestHandler, etc. */

#if defined (_WINDOWS ) && defined (_WIN32)
#include <winbase.h>
#endif
/****************************************************************************
 *
 *  CHXMiniFileObject Class
 *
 *  This class inherits the interfaces required to create a File Object,
 *  which is used by the File System plug-in to handle file I/O. This class
 *  implements the IHXFileObject interface which handles the actual low
 *  level file access. The IHXRequestHandler interface is used to obtain
 *  the requested URL; while the IHXFileExists interface determines if the
 *  requested file actually exists. Since we are using COM, this class also
 *  inherits COM's IUnknown interface to handle reference counting and
 *  interface query.
 */
class CHXMiniFileObject :  public IHXFileObject,
			   public IHXDirHandler,
			   public IHXRequestHandler,
			   public IHXFileExists,
			   public IHXFileStat,
			   public IHXGetFileFromSamePool
{
public:

    CHXMiniFileObject(IHXCommonClassFactory* pClassFactory,
		      const char* pBasePath);
    ~CHXMiniFileObject(void);


    /************************************************************************
     *  IHXFileObject Interface Methods
     */
    STDMETHOD(Init       ) (THIS_ UINT32 access,IHXFileResponse* pFileResp);
    STDMETHOD(GetFilename) (THIS_ REF(const char*) pFileName);
    STDMETHOD(Read       ) (THIS_ UINT32 byteCount);
    STDMETHOD(Write      ) (THIS_ IHXBuffer* pDataToWrite);
    STDMETHOD(Seek       ) (THIS_ UINT32 offset, BOOL bRelative);
    STDMETHOD(Advise     ) (THIS_ UINT32 useage);
    STDMETHOD(Close      ) (THIS);


    /************************************************************************
     *  IHXRequestHandler Interface Methods
     */
    STDMETHOD(SetRequest) (THIS_     IHXRequest*  pRequest);
    STDMETHOD(GetRequest) (THIS_ REF(IHXRequest*) pRequest);


    /************************************************************************
     *  IHXFileExists Interface Methods
     */
    STDMETHOD(DoesExist)(THIS_ const char* pFilePath,
			 IHXFileExistsResponse* pFileResponse);


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

    /************************************************************************
     *  IHXFileStat Interface Methods
     */
    STDMETHOD(Stat)(THIS_ IHXFileStatResponse* pFileStatResponse);

    /************************************************************************
     *  IHXDirHandler Interface Methods
     */
    STDMETHOD(InitDirHandler)(THIS_ IHXDirHandlerResponse* pDirResponse);

    /************************************************************************
     *  IHXDirHandler Interface Methods
     */
    STDMETHOD(CloseDirHandler)	(THIS);

    /************************************************************************
     *  IHXDirHandler Interface Methods
     */
    STDMETHOD(MakeDir)	(THIS);

    /************************************************************************
     *  IHXDirHandler Interface Methods
     */
    STDMETHOD(ReadDir)	(THIS);

    /************************************************************************
     *  IHXGetFileFromSamePool Interface Methods
     */
    STDMETHOD(GetFileObjectFromPool) (THIS_ IHXGetFileFromSamePoolResponse* response);

private:
    /****** Private Class Variables ****************************************/
    INT32                   m_RefCount;       // Object's reference count
    IHXCommonClassFactory*  m_pClassFactory;  // Creates common classes
    IHXFileResponse*        m_pFileResponse;  // Provides completion notif.
    FILE*                   m_pFile;          // Actual file pointer
    char*		    m_pFilename;      // Object's copy of file name
    IHXRequest*             m_pRequest;       // Used to get requested URL
    char*                   m_pBasePath;      // Platform's root path
    UINT32                  m_FileAccessMode; // Current file access mode
    IHXDirHandlerResponse*  m_pDirResponse;   // Target for dir functions
#if defined (_WINDOWS ) && defined (_WIN32)
    HANDLE			m_hFileHandle; // Used for WIN32 ReadDir()
    WIN32_FIND_DATA	m_FileInfo;            // Used for WIN32 ReadDir()
#endif

    BOOL m_bInReadDone;
    IHXBuffer* m_pPendingReadBuf;

    /****** Private Class Methods ******************************************/
    STDMETHOD(OpenFile)  (THIS_ UINT32 fileMode);
    STDMETHOD(ConvertToPlatformPath)(THIS_ REF(char*)  pFilePathPlatform,
				     const char* pFilePath);
};

#endif  /* _MINIFILEOBJ_H_ */