pubenum.cpp
资源名称:shell.rar [点击查看]
上传用户:xhy777
上传日期:2007-02-14
资源大小:24088k
文件大小:3k
源码类别:
系统编程
开发平台:
Visual C++
- //---------------------------------------------------------------------------
- //
- // Copyright (c) Microsoft Corporation
- //
- // File: pubenum.cpp
- //
- // The current order of enumeration is Legacy --> Darwin --> SMS
- //
- // History:
- // 1-18-97 by dli
- //------------------------------------------------------------------------
- #include "priv.h"
- // Do not build this file if on Win9X or NT4
- #ifndef DOWNLEVEL_PLATFORM
- #include "pubenum.h"
- void _DestroyHdpaEnum(HDPA hdpaEnum)
- {
- ASSERT(IsValidHDPA(hdpaEnum));
- IEnumPublishedApps * pepa;
- int idpa;
- for (idpa = 0; idpa < DPA_GetPtrCount(hdpaEnum); idpa++)
- {
- pepa = (IEnumPublishedApps *)DPA_GetPtr(hdpaEnum, idpa);
- if (EVAL(pepa))
- pepa->Release();
- }
- DPA_Destroy(hdpaEnum);
- }
- CShellEnumPublishedApps::CShellEnumPublishedApps(HDPA hdpaEnum) : _cRef(1), _hdpaEnum(hdpaEnum)
- {
- }
- CShellEnumPublishedApps::~CShellEnumPublishedApps()
- {
- if (_hdpaEnum)
- _DestroyHdpaEnum(_hdpaEnum);
- }
- // IEnumPublishedApps::QueryInterface
- HRESULT CShellEnumPublishedApps::QueryInterface(REFIID riid, LPVOID * ppvOut)
- {
- static const QITAB qit[] = {
- QITABENT(CShellEnumPublishedApps, IEnumPublishedApps), // IID_IEnumPublishedApps
- { 0 },
- };
- return QISearch(this, qit, riid, ppvOut);
- }
- // IEnumPublishedApps::AddRef
- ULONG CShellEnumPublishedApps::AddRef()
- {
- _cRef++;
- TraceMsg(TF_OBJLIFE, "CShellEnumPublishedApps()::AddRef called, new _cRef=%lX", _cRef);
- return _cRef;
- }
- // IEnumPublishedApps::Release
- ULONG CShellEnumPublishedApps::Release()
- {
- _cRef--;
- TraceMsg(TF_OBJLIFE, "CShellEnumPublishedApps()::Release called, new _cRef=%lX", _cRef);
- if (_cRef > 0)
- return _cRef;
- delete this;
- return 0;
- }
- // IEnumPublishedApps::Next
- HRESULT CShellEnumPublishedApps::Next(IPublishedApp ** ppia)
- {
- HRESULT hres = E_FAIL;
- if (_hdpaEnum)
- {
- IEnumPublishedApps * pepa = (IEnumPublishedApps *)DPA_GetPtr(_hdpaEnum, _iEnum);
- // If pepa is not valid or pepa->Next failed, we skip this Enumerator, and go on to the next
- // one until we hit the limit
- while ((!pepa || FAILED(hres = pepa->Next(ppia))) && (_iEnum < DPA_GetPtrCount(_hdpaEnum)))
- {
- _iEnum++;
- pepa = (IEnumPublishedApps *)DPA_GetPtr(_hdpaEnum, _iEnum);
- }
- }
- return hres;
- }
- // IEnumPublishedApps::Reset
- HRESULT CShellEnumPublishedApps::Reset(void)
- {
- // Call reset on everyone in the list and set our index iEnum to 0;
- if (_hdpaEnum)
- {
- IEnumPublishedApps * pepa;
- int idpa;
- for (idpa = 0; idpa < DPA_GetPtrCount(_hdpaEnum); idpa++)
- {
- pepa = (IEnumPublishedApps *)DPA_GetPtr(_hdpaEnum, idpa);
- if (pepa)
- pepa->Reset();
- }
- _iEnum = 0;
- return S_OK;
- }
- return E_FAIL;
- }
- #endif //DOWNLEVEL_PLATFORM
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