181 lines
5.9 KiB
C
181 lines
5.9 KiB
C
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/****************************** Module Header ******************************\
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* Module Name: ENUMGEN.H
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*
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* This module contains structure definitions for the enumerator class.
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*
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* Created: 8-July-1992
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*
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* Copyright (c) 1985 - 1992 Microsoft Corporation
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*
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* History:
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* Created by TonyKit
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*
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\***************************************************************************/
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#ifndef __ENUMGEN_H__
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#define __ENUMGEN_H__
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/****** Generic Enumerator Interface ****************************************/
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#define LPENUMGENERIC IEnumGeneric FAR*
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#undef INTERFACE
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#define INTERFACE IEnumGeneric
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DECLARE_INTERFACE_(IEnumGeneric, IUnknown)
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{
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//*** IUnknown methods ***/
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STDMETHOD(QueryInterface) (THIS_ REFIID riid, LPVOID FAR* ppvObj) PURE;
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STDMETHOD_(ULONG,AddRef) (THIS) PURE;
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STDMETHOD_(ULONG,Release) (THIS) PURE;
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//*** IEnumerator methods ***/
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STDMETHOD(Next) (THIS_ ULONG celt,
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LPVOID pArrayObjs,
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ULONG FAR* pceltFetched) PURE;
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STDMETHOD(Skip) (THIS_ ULONG celt) PURE;
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STDMETHOD(Reset) (THIS) PURE;
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STDMETHOD(Clone) (THIS_ LPENUMGENERIC FAR* ppenm) PURE;
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//*** helper methods ***/
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STDMETHOD(UpdateEnumerator)(THIS_ REFIID riid, DWORD dwCurrent,
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DWORD dwNew) PURE;
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STDMETHOD(SetCurrent) (THIS_ DWORD dwCurrent) PURE;
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STDMETHOD(SetNext) (THIS_ LPENUMGENERIC pEnumGenNext) PURE;
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STDMETHOD(GetNext) (THIS_ LPENUMGENERIC FAR* ppEnumGenNext) PURE;
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STDMETHOD(SetPrev) (THIS_ LPENUMGENERIC pEnumGenPrev) PURE;
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STDMETHOD(GetPrev) (THIS_ LPENUMGENERIC FAR* ppEnumGenPrev) PURE;
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};
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/****** Generic Enumerator Callback Interface *****************************/
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#define LPENUMCALLBACK IEnumCallback FAR*
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#undef INTERFACE
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#define INTERFACE IEnumCallback
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DECLARE_INTERFACE_(IEnumCallback, IUnknown)
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{
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//*** IUnknown methods ***/
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STDMETHOD(QueryInterface) (THIS_ REFIID riid, LPVOID FAR* ppvObj) PURE;
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STDMETHOD_(ULONG,AddRef) (THIS) PURE;
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STDMETHOD_(ULONG,Release) (THIS) PURE;
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//*** IEnumCallback methods ***/
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STDMETHOD(Next) (THIS_ DWORD FAR* pdwCurrent,DWORD dwInfo,
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LPVOID FAR* ppNext) PURE;
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STDMETHOD(Skip) (THIS_ DWORD FAR* pdwCurrent,DWORD dwInfo) PURE;
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STDMETHOD(Reset) (THIS_ DWORD FAR* pdwCurrent) PURE;
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STDMETHOD(Clone) (THIS_ DWORD FAR* pdwCurrent) PURE;
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STDMETHOD(Destroy) (THIS_ DWORD dwCurrent) PURE;
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};
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/****** Generic Enumerator Holder Interface ******************************/
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#define LPENUMHOLDER IEnumHolder FAR*
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#undef INTERFACE
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#define INTERFACE IEnumHolder
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DECLARE_INTERFACE_(IEnumHolder, IUnknown)
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{
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//*** IUnknown methods ***/
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STDMETHOD(QueryInterface) (THIS_ REFIID riid, LPVOID FAR* ppvObj) PURE;
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STDMETHOD_(ULONG,AddRef) (THIS) PURE;
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STDMETHOD_(ULONG,Release) (THIS) PURE;
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//*** IEnumHolder methods ***/
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STDMETHOD(CreateEnumerator)(THIS_ REFIID riid, DWORD dwInfo,
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LPENUMCALLBACK pEnumCallback,
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LPVOID FAR* ppGenericEnumerator) PURE;
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STDMETHOD(UpdateEnumerators)(THIS_ REFIID riid, DWORD dwCurrent,
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DWORD dwNew) PURE;
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STDMETHOD(RemoveEnumerator)(THIS_ LPENUMGENERIC pEnumGeneric) PURE;
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STDMETHOD(EnumeratorCount)(THIS_ WORD FAR* pwCount) PURE;
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};
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STDAPI CreateEnumHolder(LPENUMHOLDER FAR* ppEnumHolder);
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/****** CEnumList class *************************************/
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class FAR CEnumHolder : public IEnumHolder, public CPrivAlloc {
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public:
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//*** IUnknown methods ***/
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STDMETHOD(QueryInterface) (REFIID riid, LPLPVOID ppvObj);
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STDMETHOD_(ULONG,AddRef) ();
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STDMETHOD_(ULONG,Release) ();
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//*** IEnumHolder methods ***/
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STDMETHOD(CreateEnumerator)(REFIID riid, DWORD dwInfo,
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LPENUMCALLBACK pEnumCallback,
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LPLPVOID ppGenericEnumerator);
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STDMETHOD(UpdateEnumerators)(REFIID riid, DWORD dwCurrent,
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DWORD dwNew);
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STDMETHOD(RemoveEnumerator)(LPENUMGENERIC pEnumGeneric);
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STDMETHOD(EnumeratorCount)(WORD FAR* pwCount);
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STDSTATIC_(CEnumHolder FAR*) Create(void);
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ctor_dtor:
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CEnumHolder() { GET_A5(); m_nCount = 0; m_refs = 0; m_pFirst = NULL; m_pLast = NULL; }
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~CEnumHolder() {}
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private:
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ULONG m_refs;
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WORD m_nCount;
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LPENUMGENERIC m_pFirst;
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LPENUMGENERIC m_pLast;
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SET_A5;
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};
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/****** CEnumGeneric class *************************************/
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class FAR CEnumGeneric : public IEnumGeneric {
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public:
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//*** IUnknown methods ***/
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STDMETHOD(QueryInterface) (REFIID riid, LPLPVOID ppvObj);
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STDMETHOD_(ULONG,AddRef) ();
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STDMETHOD_(ULONG,Release) ();
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//*** IEnumGeneric methods ***/
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STDMETHOD(Next) (ULONG celt, LPVOID pArrayObjs, ULONG FAR* pceltFetched);
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STDMETHOD(Skip) (ULONG celt);
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STDMETHOD(Reset) ();
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STDMETHOD(Clone) (LPENUMGENERIC FAR* ppenm);
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//*** helper methods ***/
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STDMETHOD(UpdateEnumerator)(REFIID riid, DWORD dwCurrent, DWORD dwNew);
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STDMETHOD(SetCurrent) (DWORD dwCurrent);
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STDMETHOD(SetNext)(LPENUMGENERIC pNext);
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STDMETHOD(GetNext)(LPENUMGENERIC FAR* ppNext);
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STDMETHOD(SetPrev)(LPENUMGENERIC pPrev);
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STDMETHOD(GetPrev)(LPENUMGENERIC FAR* ppPrev);
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STDSTATIC_(CEnumGeneric FAR*) Create(LPENUMHOLDER pEnumHolder, REFIID riid,
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DWORD dwInfo, LPENUMCALLBACK pEnumCallback);
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ctor_dtor:
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CEnumGeneric() { GET_A5(); m_refs = 0; m_dwCurrent = 0; m_pNext = m_pPrev = NULL; }
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~CEnumGeneric() {}
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private:
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IID m_iid;
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ULONG m_refs; // referance count, when 0 this object goes away
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DWORD m_dwCurrent;
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DWORD m_dwDirection; // extra information for enumerator
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LPENUMCALLBACK m_pEnumCallback; // callback proc to get the next element
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LPENUMHOLDER m_pParent; // pointer to the list which owns this object
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LPENUMGENERIC m_pNext; // pointer to the next guy in the list
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LPENUMGENERIC m_pPrev; // pointer to the prev guy in the list
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SET_A5;
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};
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#endif // __ENUMGEN_H__
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