85 lines
2 KiB
C++
85 lines
2 KiB
C++
//+--------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1992.
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//
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// File: expiter.hxx
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//
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// Contents: CExposedIterator header file
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//
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// Classes: CExposedIterator
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//
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//---------------------------------------------------------------
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#ifndef __EXPITER_HXX__
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#define __EXPITER_HXX__
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#include "h/dfmsp.hxx"
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class CDirectStream;
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//+--------------------------------------------------------------
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//
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// Class: CExposedIterator (ei)
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//
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// Purpose: Iterator for wrapped DocFiles
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//
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// Interface: See below
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//
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//---------------------------------------------------------------
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interface CExposedIterator : public IEnumSTATSTG
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{
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public:
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CExposedIterator(CExposedDocFile *ppdf, CDfName *pKey);
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~CExposedIterator(void);
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// From IUnknown
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STDMETHOD(QueryInterface)(REFIID iid, void **ppvObj);
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STDMETHOD_(ULONG,AddRef)(void);
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STDMETHOD_(ULONG,Release)(void);
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// New methods
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STDMETHOD(Next)(ULONG celt, STATSTG FAR *rgelt,
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ULONG *pceltFetched);
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#ifndef _UNICODE
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SCODE Next(ULONG celt, STATSTGW FAR *rgelt, ULONG *pceltFetched);
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#endif
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STDMETHOD(Skip)(ULONG celt);
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STDMETHOD(Reset)(void);
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STDMETHOD(Clone)(IEnumSTATSTG **ppenm);
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inline SCODE Validate(void) const;
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private:
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CDfName _dfnKey;
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LONG _cReferences;
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ULONG _sig;
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CExposedDocFile *_ppdf;
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};
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// DocFileIter signatures
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#define CEXPOSEDITER_SIG LONGSIG('E', 'D', 'F', 'I')
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#define CEXPOSEDITER_SIGDEL LONGSIG('E', 'd', 'F', 'i')
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//+--------------------------------------------------------------
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//
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// Member: CExposedIterator::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
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// doesn't match
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//
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//---------------------------------------------------------------
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inline SCODE CExposedIterator::Validate(void) const
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{
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return (this == NULL ||
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_sig != CEXPOSEDITER_SIG) ? STG_E_INVALIDHANDLE : S_OK;
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}
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#endif
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