98 lines
2.6 KiB
C++
98 lines
2.6 KiB
C++
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//+-------------------------------------------------------------------
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//
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// File: stream.hxx
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//
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// Contents: Stream class on a file.
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//
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// Classes: CStreamOnFile
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//
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// History: 08-08-95 Rickhi Created
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//
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//--------------------------------------------------------------------
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#ifndef __STREAMONFILE_HXX__
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#define __STREAMONFILE_HXX__
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//+-------------------------------------------------------------------
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//
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// Class: CStreamOnFile
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//
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// Purpose: Stream wrapper for a flat file.
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//
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// History: 30-Jan-93 Ricksa Created
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//
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//--------------------------------------------------------------------
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class CStreamOnFile : public IStream
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{
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public:
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CStreamOnFile(const TCHAR *pwszFileName, SCODE &sc, BOOL fRead);
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~CStreamOnFile(void);
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STDMETHOD(QueryInterface)(
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REFIID iidInterface,
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void FAR* FAR* ppvObj);
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STDMETHOD_(ULONG,AddRef)(void);
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STDMETHOD_(ULONG,Release)(void);
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STDMETHOD(Read)(
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VOID HUGEP* pv,
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ULONG cb,
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ULONG FAR* pcbRead);
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STDMETHOD(Write)(
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VOID const HUGEP* pv,
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ULONG cb,
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ULONG FAR* pcbWritten);
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STDMETHOD(Seek)(
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LARGE_INTEGER dlibMove,
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DWORD dwOrigin,
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ULARGE_INTEGER FAR* plibNewPosition);
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STDMETHOD(SetSize) (ULARGE_INTEGER cb);
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STDMETHOD(CopyTo)(
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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)(DWORD grfCommitFlags);
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STDMETHOD(Revert)(void);
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STDMETHOD(LockRegion)(
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ULARGE_INTEGER libOffset,
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ULARGE_INTEGER cb,
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DWORD dwLockType);
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STDMETHOD(UnlockRegion)(
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ULARGE_INTEGER libOffset,
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ULARGE_INTEGER cb,
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DWORD dwLockType);
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STDMETHOD(Stat)(
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STATSTG FAR* pstatstg,
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DWORD statflag);
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STDMETHOD(Clone)(IStream FAR * FAR *ppstm);
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private:
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LONG _clRefs; // reference count
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HANDLE _hFile; // file handle
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BOOL _fRead; // read or write side
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ULONG _lOffset; // current seek ptr
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ULONG _cSize; // number of bytes written
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ULONG _cbData; // size of data
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BYTE *_pbData; // ptr to data
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};
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#endif // _STREAMONFILE_HXX__
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