121 lines
3.2 KiB
C++
121 lines
3.2 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: filstm.hxx
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//
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// Contents: CNtFileStream header
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//
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// Classes: CNtFileStream
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//
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// History: 28-Jun-93 DrewB Created
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//
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// Notes: Non-OFS
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//
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//----------------------------------------------------------------------------
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#ifndef __FILSTM_HXX__
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#define __FILSTM_HXX__
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#include <otrack.hxx>
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#include <overlap.hxx>
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//+---------------------------------------------------------------------------
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//
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// Class: CNtFileStream (fs)
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//
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// Purpose: Implements IStream for an NT handle
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//
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// Interface: IStream
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//
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// History: 28-Jun-93 DrewB Created
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//
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//----------------------------------------------------------------------------
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interface CNtFileStream
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: INHERIT_TRACKING,
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//public IStream,
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public COverlappedStream
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{
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public:
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CNtFileStream(void);
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SCODE InitFromHandle(HANDLE h,
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DWORD grfMode,
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CREATEOPEN co,
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LPSTGSECURITY pssSecurity);
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SCODE InitFromPath(HANDLE hParent,
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const WCHAR *pwcsName,
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DWORD grfMode,
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DWORD grfAttr,
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CREATEOPEN co,
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LPSTGSECURITY pssSecurity);
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SCODE InitClone(HANDLE h,
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DWORD grfMode);
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~CNtFileStream(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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// IStream
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STDMETHOD(Read)(VOID *pv,
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ULONG cb,
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ULONG *pcbRead);
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STDMETHOD(Write)(VOID const *pv,
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ULONG cb,
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ULONG *pcbWritten);
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STDMETHOD(Seek)(LARGE_INTEGER dlibMove,
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DWORD dwOrigin,
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ULARGE_INTEGER *plibNewPosition);
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STDMETHOD(SetSize)(ULARGE_INTEGER cb);
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STDMETHOD(CopyTo)(IStream *pstm,
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ULARGE_INTEGER cb,
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ULARGE_INTEGER *pcbRead,
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ULARGE_INTEGER *pcbWritten);
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STDMETHOD(Commit)(DWORD grfCommitFlags);
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STDMETHOD(Revert)(void);
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STDMETHOD(LockRegion)(ULARGE_INTEGER libOffset,
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ULARGE_INTEGER cb,
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DWORD dwLockType);
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STDMETHOD(UnlockRegion)(ULARGE_INTEGER libOffset,
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ULARGE_INTEGER cb,
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DWORD dwLockType);
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STDMETHOD(Stat)(STATSTG *pstatstg, DWORD grfStatFlag);
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STDMETHOD(Clone)(IStream **ppstm);
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private:
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inline SCODE Validate(void) const;
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SCODE ValidateMode(DWORD grfMode);
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SCODE InitCommon(CREATEOPEN co);
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//NuSafeNtHandle _h; // moved to COverlappedStream
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ULONG _sig;
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DWORD _grfMode;
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};
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SAFE_INTERFACE_PTR(SafeCNtFileStream, CNtFileStream);
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#define CNTFILESTREAM_SIG LONGSIG('F', 'S', 'T', 'M')
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#define CNTFILESTREAM_SIGDEL LONGSIG('F', 's', 'T', 'm')
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//+--------------------------------------------------------------
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//
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// Member: CNtFileStream::Validate, private
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//
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// Synopsis: Validates the class signature
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//
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// Returns: Returns STG_E_INVALIDHANDLE for failure
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//
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// History: 28-Jun-93 DrewB Created
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//
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//---------------------------------------------------------------
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inline SCODE CNtFileStream::Validate(void) const
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{
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return (this == NULL || _sig != CNTFILESTREAM_SIG) ?
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STG_E_INVALIDHANDLE : S_OK;
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}
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#endif // #ifndef __FILSTM_HXX__
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