96 lines
3.8 KiB
C++
96 lines
3.8 KiB
C++
// --------------------------------------------------------------------------------
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// BINDSTM.H
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// Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
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// Steven J. Bailey
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// --------------------------------------------------------------------------------
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#ifndef __BINDSTM_H
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#define __BINDSTM_H
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// --------------------------------------------------------------------------------
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// Depends
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// --------------------------------------------------------------------------------
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#include "vstream.h"
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// --------------------------------------------------------------------------------
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// CBindStream
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// --------------------------------------------------------------------------------
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class CBindStream : public IStream
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{
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public:
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// -------------------------------------------------------------------------
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// Construction
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// -------------------------------------------------------------------------
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CBindStream(IStream *pSource);
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~CBindStream(void);
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// -------------------------------------------------------------------------
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// IUnknown
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// -------------------------------------------------------------------------
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STDMETHODIMP QueryInterface(REFIID, LPVOID *);
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STDMETHODIMP_(ULONG) AddRef(void);
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STDMETHODIMP_(ULONG) Release(void);
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// -------------------------------------------------------------------------
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// IStream
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// -------------------------------------------------------------------------
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STDMETHODIMP Read(void HUGEP_16 *, ULONG, ULONG *);
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STDMETHODIMP Seek(LARGE_INTEGER, DWORD, ULARGE_INTEGER *);
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STDMETHODIMP Stat(STATSTG *, DWORD);
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STDMETHODIMP Write(const void HUGEP_16 *, ULONG, ULONG *) {
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return TrapError(STG_E_ACCESSDENIED); }
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STDMETHODIMP SetSize(ULARGE_INTEGER) {
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return E_NOTIMPL; }
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STDMETHODIMP CopyTo(LPSTREAM, ULARGE_INTEGER, ULARGE_INTEGER *, ULARGE_INTEGER *) {
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return E_NOTIMPL; }
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STDMETHODIMP Commit(DWORD) {
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return E_NOTIMPL; }
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STDMETHODIMP Revert(void) {
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return E_NOTIMPL; }
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STDMETHODIMP LockRegion(ULARGE_INTEGER, ULARGE_INTEGER, DWORD) {
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return E_NOTIMPL; }
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STDMETHODIMP UnlockRegion(ULARGE_INTEGER, ULARGE_INTEGER, DWORD) {
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return E_NOTIMPL; }
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STDMETHODIMP Clone(LPSTREAM *) {
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return E_NOTIMPL; }
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// -------------------------------------------------------------------------
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// CBindStream Methods
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// -------------------------------------------------------------------------
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void HandsOffSource(void) {
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EnterCriticalSection(&m_cs);
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SafeRelease(m_pSource);
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LeaveCriticalSection(&m_cs);
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}
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// -------------------------------------------------------------------------
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// CBindStream Debug Methods
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// -------------------------------------------------------------------------
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#ifdef DEBUG
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void DebugDumpDestStream(LPCSTR pszFile);
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#endif
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private:
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// -------------------------------------------------------------------------
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// Private Methods
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// -------------------------------------------------------------------------
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#ifdef DEBUG
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void DebugAssertOffset(void);
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#endif
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private:
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// -------------------------------------------------------------------------
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// Private Data
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// -------------------------------------------------------------------------
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LONG m_cRef; // Reference count
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CVirtualStream m_cDest; // The Destination Stream
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IStream *m_pSource; // The Source Stream
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DWORD m_dwDstOffset; // CBindStream Offset
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DWORD m_dwSrcOffset; // Source Offset
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#ifdef DEBUG
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IStream *m_pDebug;
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#endif
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CRITICAL_SECTION m_cs; // Critical Section for m_pStream
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};
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#endif // __BINDSTM_H
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