208 lines
6.6 KiB
C
208 lines
6.6 KiB
C
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//+----------------------------------------------------------------------------
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//
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// File:
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// utstream.h
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//
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// Contents:
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// Ole stream utility routines
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//
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// Classes:
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//
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// Functions:
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//
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// History:
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// 12/07/93 - ChrisWe - file inspection and cleanup; removed
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// redeclarations of ReadStringStream, and
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// WriteStringStream which are declared in ole2sp.h;
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// made default params on StSetSize explicit; removed
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// signatures of obsolete (non-existent) atom reading and
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// writing routines
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//
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//-----------------------------------------------------------------------------
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#ifndef _UTSTREAM_H_
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#define _UTSTREAM_H_
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// REVIEW, isn't this obsolete now, as StWrite is?
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FARINTERNAL_(HRESULT) StRead(IStream FAR * lpstream, LPVOID lpBuf, ULONG ulLen);
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#define StWrite(lpstream, lpBuf, ulLen) lpstream->Write(lpBuf, ulLen, NULL)
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//+----------------------------------------------------------------------------
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//
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// Function:
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// StSetSize, internal
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//
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// Synopsis:
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// Sets the size of the stream, using IStream::SetSize(). Saves
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// the caller having to deal with the requisite ULARGE_INTEGER
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// parameter, by initializing one from the [dwSize] argument.
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//
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// Arguments:
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// [pstm] -- the stream to set the size of
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// [dwSize] -- the size to set
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// [fRelative] -- if TRUE, indicates that the size is [dwSize]
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// plus the current seek position in the stream; if
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// FALSE, sets [dwSize] as the absolute size
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//
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// Returns:
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// HRESULT
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//
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// Notes:
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// REVIEW, this seems crocked. When would you ever call
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// this with [fRelative] == TRUE, and a non-zero [dwSize]?
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//
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// History:
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// 12/07/93 - ChrisWe - file inspection and cleanup
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//
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//-----------------------------------------------------------------------------
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FARINTERNAL StSetSize(LPSTREAM pstm, DWORD dwSize, BOOL fRelative);
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// REVIEW, are the the following functions necessary anymore?
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FARINTERNAL StSave10NativeData(IStorage FAR* pstgSave, HANDLE hNative,
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BOOL fIsOle1Interop);
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FARINTERNAL StRead10NativeData(IStorage FAR* pstgSave, HANDLE FAR *phNative);
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FARINTERNAL StSave10ItemName(IStorage FAR* pstg, LPCSTR szItemName);
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//+---------------------------------------------------------------------------
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//
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// Class: CStmBuf, Base class.
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//
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// Synopsis: Internal buffered Streams.
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//
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// Interfaces: CStmBuf - Constructor.
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// ~CStmBuf - Destructor.
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// Release - Release interface (used with OpenStream).
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//
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// History: 20-Feb-95 KentCe Created.
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//
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// Notes: This is a simple buffered class for internal use only.
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//
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//----------------------------------------------------------------------------
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class CStmBuf
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{
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public:
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CStmBuf();
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~CStmBuf();
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protected:
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IStream * m_pStm; // Stream Interface to read/write.
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BYTE m_aBuffer[256]; // Small read/write buffer.
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PBYTE m_pBuffer; // Pointer into read/write buffer.
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ULONG m_cBuffer; // Count of characters in read/write buffer.
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};
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//+---------------------------------------------------------------------------
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//
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// Class: CStmBufRead
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//
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// Synopsis: Internal buffered read of Streams.
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//
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// Interfaces: Init - Defines stream to read.
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// OpenStream - Opens a stream for reading.
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// Read - Read from the stream.
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// ReadLong - Read a long value from the stream.
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// Release - Release interface (used with OpenStream).
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//
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// History: 20-Feb-95 KentCe Created.
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//
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// Notes: This is a simple buffered read class for internal use only.
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//
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//----------------------------------------------------------------------------
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class CStmBufRead : public CStmBuf
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{
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public:
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void Init(IStream * pstm);
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HRESULT OpenStream(IStorage * pstg, const OLECHAR * pwcsName);
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HRESULT Read(PVOID pBuf, ULONG cBuf);
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HRESULT ReadLong(LONG * plValue);
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void Release();
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private:
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void Reset(void);
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};
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//+---------------------------------------------------------------------------
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//
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// Class: CStmBufWrite
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//
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// Synopsis: Internal buffered write of Streams.
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//
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// Interfaces: Init - Defines stream to write.
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// OpenOrCreateStream - Opens/Creates a stream for writing.
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// CreateStream - Creates a stream for writing.
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// Write - Write to the stream.
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// WriteLong - Write a long value to the stream.
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// Flush - Flush buffer to the disk subsystem.
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// Release - Release interface.
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//
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// History: 20-Feb-95 KentCe Created.
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//
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// Notes: This is a simple buffered write class for internal use only.
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//
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//----------------------------------------------------------------------------
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class CStmBufWrite : public CStmBuf
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{
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public:
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void Init(IStream * pstm);
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HRESULT OpenOrCreateStream(IStorage * pstg, const OLECHAR * pwcsName);
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HRESULT CreateStream(IStorage * pstg, const OLECHAR * pwcsName);
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HRESULT Write(void const * pBuf, ULONG cBuf);
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HRESULT WriteLong(LONG lValue);
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HRESULT Flush(void);
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void Release();
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private:
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void Reset(void);
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};
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//
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// The following was moved from the ole2sp.h file to keep stream related API's
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// in one place.
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//
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// Utility function not in the spec; in ole2.dll.
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// Read and write length-prefixed strings. Open/Create stream.
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// ReadStringStream does allocation, returns length of
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// required buffer (strlen + 1 for terminating null)
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STDAPI ReadStringStream( CStmBufRead & StmRead, LPOLESTR FAR * ppsz );
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STDAPI WriteStringStream( CStmBufWrite & StmWrite, LPCOLESTR psz );
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STDAPI OpenOrCreateStream( IStorage FAR * pstg, const OLECHAR FAR * pwcsName,
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IStream FAR* FAR* ppstm);
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//
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// The following versions of StringStream are used with ANSI data
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//
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STDAPI ReadStringStreamA( CStmBufRead & StmRead, LPSTR FAR * ppsz );
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// read and write ole control stream (in ole2.dll)
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STDAPI WriteOleStg (LPSTORAGE pstg, IOleObject FAR* pOleObj,
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DWORD dwReserved, LPSTREAM FAR* ppstmOut);
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STDAPI WriteOleStgEx(LPSTORAGE pstg, IOleObject* pOleObj, DWORD dwReserved,
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DWORD dwGivenFlags, LPSTREAM* ppstmOut);
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STDAPI ReadOleStg (LPSTORAGE pstg, DWORD FAR* pdwFlags,
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DWORD FAR* pdwOptUpdate, DWORD FAR* pdwReserved,
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LPMONIKER FAR* ppmk, LPSTREAM FAR* pstmOut);
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STDAPI ReadM1ClassStm(LPSTREAM pstm, CLSID FAR* pclsid);
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STDAPI WriteM1ClassStm(LPSTREAM pstm, REFCLSID rclsid);
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STDAPI ReadM1ClassStmBuf(CStmBufRead & StmRead, CLSID FAR* pclsid);
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STDAPI WriteM1ClassStmBuf(CStmBufWrite & StmWrite, REFCLSID rclsid);
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#endif // _UTSTREAM_H
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