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fileread.h
Package: 142_61_thumb_advanced.rar [view]
Upload User: dangjiwu
Upload Date: 2013-07-19
Package Size: 42019k
Code Size: 5k
Category:
Symbian
Development Platform:
Visual C++
- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: fileread.h,v 1.1.26.1 2004/07/09 01:54:36 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 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 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (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.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * 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 FILEREAD_H
- #define FILEREAD_H
- // Forward declarations
- typedef _INTERFACE IHXBuffer IHXBuffer;
- typedef _INTERFACE IHXFileResponse IHXFileResponse;
- typedef _INTERFACE IHXFileObject IHXFileObject;
- typedef _INTERFACE IHXCommonClassFactory IHXCommonClassFactory;
- class CHXBaseCountingObject;
- class CHXFileReaderResponse : public IUnknown
- {
- public:
- CHXFileReaderResponse() {};
- virtual ~CHXFileReaderResponse() {};
- // IUnknown methods
- STDMETHOD(QueryInterface) (THIS_ REFIID riid, void** ppvObj) PURE;
- STDMETHOD_(UINT32,AddRef) (THIS) PURE;
- STDMETHOD_(UINT32,Release) (THIS) PURE;
- STDMETHOD(InitDone) (THIS_ HX_RESULT status) PURE;
- STDMETHOD(ReadDone) (THIS_ HX_RESULT status, IHXBuffer* pBuffer) PURE;
- STDMETHOD(ShutdownDone) (THIS) PURE;
- };
- class CHXFileReader : public CHXBaseCountingObject,
- public IHXFileResponse
- {
- public:
- CHXFileReader();
- virtual ~CHXFileReader();
- // CHXFileReader methods
- STDMETHOD(Init) (THIS_ IUnknown* pContext,
- IHXFileObject* pFileObject,
- BOOL bCanPreload,
- BOOL bCanCache,
- CHXFileReaderResponse* pResponse);
- STDMETHOD(Read) (THIS_ UINT32 ulOffset, UINT32 ulNumBytes);
- STDMETHOD(Shutdown) (THIS);
- // IUnknown methods
- STDMETHOD(QueryInterface) (THIS_ REFIID riid, void** ppvObj);
- STDMETHOD_(UINT32,AddRef) (THIS);
- STDMETHOD_(UINT32,Release) (THIS);
- // IHXFileResponse methods
- STDMETHOD(InitDone) (THIS_ HX_RESULT status);
- STDMETHOD(CloseDone) (THIS_ HX_RESULT status);
- STDMETHOD(ReadDone) (THIS_ HX_RESULT status, IHXBuffer* pBuffer);
- STDMETHOD(WriteDone) (THIS_ HX_RESULT status);
- STDMETHOD(SeekDone) (THIS_ HX_RESULT status);
- protected:
- enum
- {
- kStateConstructed,
- kStateInitPending,
- kStateReady,
- kStateSeekPending,
- kStateReadPending,
- kStateClosePending,
- kReadSize = 2048,
- kFlagCanPreload = 1,
- kFlagCanCache = 2
- };
- INT32 m_lRefCount;
- IUnknown* m_pContext;
- IHXFileObject* m_pFileObject;
- CHXFileReaderResponse* m_pResponse;
- IHXCommonClassFactory* m_pCommonClassFactory;
- UINT32 m_ulState;
- UINT32 m_ulFlags;
- UINT32 m_ulCurrentOffset;
- UINT32 m_ulReqOffset;
- UINT32 m_ulReqNumBytes;
- void Deallocate();
- BOOL CanPreload() { return (m_ulFlags & kFlagCanPreload ? TRUE : FALSE); }
- BOOL CanCache() { return (m_ulFlags & kFlagCanCache ? TRUE : FALSE); }
- };
- #endif