90 lines
2.2 KiB
C++
90 lines
2.2 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1993.
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//
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// File: ofspenm.hxx
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//
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// Contents: COfsPropStgEnum header
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//
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// Classes: COfsPropStgEnum
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//
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// History: 10-Jun-93 DrewB Created
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//
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//----------------------------------------------------------------------------
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#ifndef __OFSPENM_HXX__
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#define __OFSPENM_HXX__
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#include <otrack.hxx>
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#include <dfmem.hxx>
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#include <safepnt.hxx>
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#include <ntsupp.hxx>
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//+---------------------------------------------------------------------------
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//
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// Class: COfsPropStgEnum (opge)
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//
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// Purpose: IEnumSTATPROPSTG for OFS
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//
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// Interface: IEnumSTATPROPSTG
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//
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// History: 10-Jun-93 DrewB Created
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//
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//----------------------------------------------------------------------------
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interface COfsPropStgEnum
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: INHERIT_TRACKING,
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public IEnumSTATPROPSTG
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{
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public:
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COfsPropStgEnum(void);
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SCODE InitFromHandle(HANDLE h, REFIID riid, ULONG cEntry);
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~COfsPropStgEnum(void);
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// IUnknown
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STDMETHOD(QueryInterface)(REFIID iid, void **ppvObj);
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DECLARE_STD_REFCOUNTING;
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// IEnumSTATPROPSTG
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STDMETHOD(Next)(ULONG celt,
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STATPROPSTG FAR *rgelt,
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ULONG *pceltFetched);
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STDMETHOD(Skip)(ULONG celt);
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STDMETHOD(Reset)(void);
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STDMETHOD(Clone)(IEnumSTATPROPSTG **ppenm);
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private:
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inline SCODE Validate(void) const;
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IID _iid;
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ULONG _sig;
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ULONG _cEntry;
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NuSafeNtHandle _h;
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};
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SAFE_INTERFACE_PTR(SafeCOfsPropStgEnum, COfsPropStgEnum);
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#define COFSPROPSTGENUM_SIG LONGSIG('O', 'P', 'G', 'E')
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#define COFSPROPSTGENUM_SIGDEL LONGSIG('O', 'p', 'G', 'e')
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//+--------------------------------------------------------------
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//
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// Member: COfsPropStgEnum::Validate, public
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//
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// Synopsis: Validates the signature
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//
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// Returns: Returns STG_E_INVALIDHANDLE if the signature doesn't match
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//
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// History: 12-Mar-92 DrewB Created
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//
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//---------------------------------------------------------------
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inline SCODE COfsPropStgEnum::Validate(void) const
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{
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return (this == NULL || _sig != COFSPROPSTGENUM_SIG) ?
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STG_E_INVALIDHANDLE : S_OK;
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}
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#endif // #ifndef __OFSPENM_HXX__
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