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73 lines
1.6 KiB
73 lines
1.6 KiB
#ifndef __ENUMERATORTEMPLATES_H__
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#define __ENUMERATORTEMPLATES_H__
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template <class TIMPL, class TELT>
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class CEnumAny : public TIMPL
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{
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public:
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CEnumAny() : _cRef(1), _cNext(0) {}
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virtual ~CEnumAny() {}
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// IUnknown methods
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// STDMETHODIMP QueryInterface(REFIID riid, void **ppv);
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STDMETHODIMP_(ULONG) AddRef()
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{
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return ++_cRef;
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}
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STDMETHODIMP_(ULONG) Release()
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{
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if (--_cRef > 0)
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return _cRef;
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delete this;
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return 0;
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}
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// IEnumXXXX methods
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STDMETHODIMP Next(ULONG celt, TELT *rgelt, ULONG *pcelt)
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{
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UINT cNum = 0;
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ZeroMemory(rgelt, sizeof(rgelt[0])*celt);
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while (cNum < celt
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&& _Next(&rgelt[cNum]))
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{
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_cNext++;
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cNum++;
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}
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if (pcelt)
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*pcelt = cNum;
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return (celt == cNum) ? S_OK: S_FALSE;
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}
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STDMETHODIMP Skip(ULONG celt)
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{ return E_NOTIMPL; }
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STDMETHODIMP Reset()
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{ return E_NOTIMPL; }
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STDMETHODIMP Clone(TIMPL **ppenum)
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{ return E_NOTIMPL; }
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protected:
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virtual BOOL _Next(TELT *pelt) = 0;
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protected:
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LONG _cRef;
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ULONG _cNext;
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};
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class CEnumAssociationElements : public CEnumAny<IEnumAssociationElements, IAssociationElement *>
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{
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public:
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STDMETHODIMP QueryInterface(REFIID riid, void **ppv)
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{
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static const QITAB qit[] = {
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QITABENT(CEnumAssociationElements, IEnumAssociationElements),
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{ 0 }
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};
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return QISearch(this, qit, riid, ppv);
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}
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};
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#endif // __ENUMERATORTEMPLATES_H__
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