arrenum.h
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上传日期：2013-07-19
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: arrenum.h,v 1.1.1.1.50.3 2004/07/09 01:45:50 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 ***** */
- #include "unkimp.h"
- /* This class implements the fragment Enumerator
- */
- #define DECLARE_INTERFACE_ARRAY_ENUMERATOR(ENUMERATED, IENUMERATE)
- class _C##IENUMERATE##IMP
- : public IENUMERATE
- , public CUnknownIMP
- {
- DECLARE_UNKNOWN(_C##IENUMERATE##IMP)
- public:
- _C##IENUMERATE##IMP()
- : m_arrpbufData(NULL)
- , m_ulIndex(0)
- {}
- ~_C##IENUMERATE##IMP()
- {_KillData();}
- STDMETHOD(Reset)(THIS)
- {
- m_ulIndex = 0;
- return HXR_OK;
- }
- STDMETHOD(Next)
- (
- THIS_
- UINT32 ulNumToReturn,
- ENUMERATED** ppbufNext,
- UINT32* pulNumReturned
- )
- {
- if(!ppbufNext || (ulNumToReturn != 1 && pulNumReturned == NULL))
- {
- return HXR_POINTER;
- }
- if(!m_arrpbufData || !m_ulTotal)
- {
- return HXR_FAIL;
- }
- HX_RESULT pnrRes = HXR_OK;
- UINT32 ulRemaining = m_ulTotal-m_ulIndex;
- if(ulNumToReturn > ulRemaining)
- {
- pnrRes = HXR_INCOMPLETE;
- ulNumToReturn = ulRemaining;
- }
- else
- {
- ulRemaining = ulNumToReturn;
- }
- if (pulNumReturned)
- {
- *pulNumReturned = ulNumToReturn;
- }
- while(ulRemaining)
- {
- (
- ppbufNext[ulRemaining-ulNumToReturn]
- = m_arrpbufData[m_ulIndex]
- )->AddRef();
- ++m_ulIndex;
- --ulRemaining;
- }
- return pnrRes;
- }
- STDMETHOD(Skip)
- (
- THIS_
- UINT32 ulNumToSkip
- )
- {
- m_ulIndex += ulNumToSkip;
- if (m_ulIndex < m_ulTotal)
- {
- return HXR_OK;
- }
- m_ulIndex = m_ulTotal;
- return HXR_FAIL;
- }
- STDMETHOD(Clone)
- (
- THIS_
- IENUMERATE** ppefbNew
- )
- {
- ENUMERATED** arrpbufData = NULL;
- if(m_arrpbufData && m_ulTotal)
- {
- UINT32 ulIndex = 0;
- arrpbufData = (ENUMERATED**)new ENUMERATED*[m_ulTotal];
- for
- (
- ulIndex = 0;
- ulIndex < m_ulTotal;
- ++ulIndex
- )
- {
- arrpbufData[ulIndex] = m_arrpbufData[ulIndex];
- (arrpbufData[ulIndex])->AddRef();
- }
- }
- _C##IENUMERATE##IMP* pNewEnum = CreateObject();
- pNewEnum->_SetData(arrpbufData, m_ulTotal, m_ulIndex);
- return pNewEnum->QueryInterface(IID_##IENUMERATE, (void**)ppefbNew);
- }
- void _SetData
- (
- ENUMERATED** arrpbufData,
- UINT32 ulTotal,
- UINT32 ulIndex = 0
- )
- {
- _KillData();
- m_arrpbufData = arrpbufData;
- m_ulTotal = ulTotal;
- m_ulIndex = ulIndex;
- }
- private:
- void _KillData()
- {
- if(m_arrpbufData)
- {
- for
- (
- m_ulIndex = 0;
- m_ulIndex < m_ulTotal;
- ++m_ulIndex
- )
- {
- (m_arrpbufData[m_ulIndex])->Release();
- }
- delete[] m_arrpbufData;
- m_ulIndex = 0;
- }
- }
- ENUMERATED** m_arrpbufData;
- UINT32 m_ulIndex;
- UINT32 m_ulTotal;
- }
- #define IMPLEMENT_INTERFACE_ARRAY_ENUMERATOR(IENUMERATE)
- BEGIN_INTERFACE_LIST(_C##IENUMERATE##IMP)
- INTERFACE_LIST_ENTRY(IID_##IENUMERATE, IENUMERATE)
- END_INTERFACE_LIST
- #define CREATE_INTERFACE_ARRAY_ENUMERATOR(IENUMERATE, ARRAY, TOTAL, NEWENUM)
- {
- _C##IENUMERATE##IMP* _pNewEnum = _C##IENUMERATE##IMP::CreateObject();
- _pNewEnum->_SetData(ARRAY, TOTAL);
- _pNewEnum->QueryInterface(IID_##IENUMERATE, (void**)NEWENUM);
- }
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