166 lines
5.0 KiB
C++
166 lines
5.0 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: odocstm.hxx
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//
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// Contents: COfsDocStream header
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//
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// Classes: COfsDocStream
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//
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// History: 11-Feb-94 PhilipLa Created.
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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#ifndef __ODOCSTM_HXX__
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#define __ODOCSTM_HXX__
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#include <overlap.hxx>
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#include <accstg.hxx>
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#include <omarshal.hxx>
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//+---------------------------------------------------------------------------
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//
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// Class: COfsDocStream (ds)
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//
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// Purpose: Implements IStream for a compound doc on OFS
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//
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// Interface: See below
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//
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// History: 07-Feb-94 PhilipLa Created
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//
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//----------------------------------------------------------------------------
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interface COfsDocStream : public COverlappedStream,
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INHERIT_TRACKING,
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// public IStream,
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public CAccessControl,
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public CNtHandleMarshal,
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public INativeFileSystem
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{
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public:
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COfsDocStream(void);
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SCODE InitFromHandle(HANDLE h,
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WCHAR const *pwcsName,
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DWORD grfMode,
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BOOL fRestricted);
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SCODE InitFromPath(HANDLE hParent,
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WCHAR const *pwcsName,
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DWORD grfMode,
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CREATEOPEN co,
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BOOL fRestricted,
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LPSECURITY_ATTRIBUTES pssSecurity);
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SCODE InitCommon(CREATEOPEN co);
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SCODE InitClone(HANDLE h, DWORD grfMode, LARGE_INTEGER liSeekPtr);
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~COfsDocStream(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 methods ***
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STDMETHOD(Read) (THIS_ VOID HUGEP *pv,
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ULONG cb, ULONG FAR *pcbRead);
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STDMETHOD(Write) (THIS_ VOID const HUGEP *pv,
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ULONG cb,
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ULONG FAR *pcbWritten);
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STDMETHOD(Seek) (THIS_ LARGE_INTEGER dlibMove,
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DWORD dwOrigin,
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ULARGE_INTEGER FAR *plibNewPosition);
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STDMETHOD(SetSize) (THIS_ ULARGE_INTEGER libNewSize);
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STDMETHOD(CopyTo) (THIS_ IStream FAR *pstm,
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ULARGE_INTEGER cb,
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ULARGE_INTEGER FAR *pcbRead,
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ULARGE_INTEGER FAR *pcbWritten);
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STDMETHOD(Commit) (THIS_ DWORD grfCommitFlags);
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STDMETHOD(Revert) (THIS);
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STDMETHOD(LockRegion) (THIS_ ULARGE_INTEGER libOffset,
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ULARGE_INTEGER cb,
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DWORD dwLockType);
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STDMETHOD(UnlockRegion) (THIS_ ULARGE_INTEGER libOffset,
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ULARGE_INTEGER cb,
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DWORD dwLockType);
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STDMETHOD(Stat) (THIS_ STATSTG FAR *pstatstg, DWORD grfStatFlag);
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STDMETHOD(Clone)(THIS_ IStream FAR * FAR *ppstm);
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STDMETHOD(GetHandle)(THIS_ HANDLE *ph);
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private:
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inline SCODE Validate(void) const;
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inline SCODE ValidateSimple() const;
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// virtual SCODE ExtValidate(void);
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SCODE ValidateMode(DWORD grfMode);
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inline SCODE ValidateLockType (DWORD lt);
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ULONG _sig;
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DWORD _grfMode;
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// NuSafeNtHandle _h; // moved to COverlappedStream
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LARGE_INTEGER _liSeekPtr;
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CRITICAL_SECTION _csSeekPtr;
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BOOL _fRestricted; // BUGBUG restricted function for Dsys APIs only
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};
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SAFE_INTERFACE_PTR(SafeCOfsDocStream, COfsDocStream);
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#define COfsDocStream_SIG LONGSIG('O', 'D', 'S', 'T')
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#define COfsDocStream_SIGDEL LONGSIG('O', 'd', 'S', 't')
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//+--------------------------------------------------------------
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//
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// Member: COfsDocStream::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: 24-Jun-93 DrewB Created
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//
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//---------------------------------------------------------------
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inline SCODE COfsDocStream::Validate(void) const
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{
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return (this == NULL || _sig != COfsDocStream_SIG) ?
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STG_E_INVALIDHANDLE : S_OK;
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}
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//+--------------------------------------------------------------
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//
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// Member: COfsDocStream::ValidateSimple, private
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//
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// Synopsis: Determines if simple mode was requested
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//
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// Returns: Returns STG_E_INVALIDFUNCTION for failure
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//
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// History: 08-Aug-95 HenryLee created
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//
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//---------------------------------------------------------------
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inline SCODE COfsDocStream::ValidateSimple() const
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{
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return (_grfMode & STGM_SIMPLE) ? STG_E_INVALIDFUNCTION : S_OK;
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}
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//+--------------------------------------------------------------
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//
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// Member: COfsDocStream::ValidateLockType, private
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//
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// Synopsis: Determines if valid locks were passed in
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//
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// Returns: Returns STG_E_INVALIDPARAMETER for failure
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//
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// History: 08-Aug-95 HenryLee created
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//
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//---------------------------------------------------------------
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inline SCODE COfsDocStream::ValidateLockType (DWORD lt)
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{
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return ((lt) == LOCK_EXCLUSIVE || (lt) == LOCK_ONLYONCE) ?
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S_OK : STG_E_INVALIDPARAMETER;
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}
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#endif // #ifndef __ODOCSTM_HXX__
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