115 lines
2.6 KiB
C
115 lines
2.6 KiB
C
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/*++
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Copyright (C) 1996-2001 Microsoft Corporation
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Module Name:
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Abstract:
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History:
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--*/
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#ifndef __BUFFER_H__
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#define __BUFFER_H__
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#include "corepol.h"
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/************************************************************************
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CBuffer
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*************************************************************************/
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class POLARITY CBuffer : public IStream
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{
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long m_cRefs;
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PBYTE m_pData;
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ULONG m_cData;
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ULONG m_iData;
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BOOL m_bDelete;
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void EnsureSize( ULONG ulSize );
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public:
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CBuffer( PBYTE pData=NULL, ULONG cData=0, BOOL bDelete=TRUE );
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CBuffer& operator= ( const CBuffer& );
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CBuffer( const CBuffer& );
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~CBuffer();
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void Reset() { m_iData = 0; }
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ULONG GetIndex() { return m_iData; }
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ULONG GetSize() { return m_cData; }
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PBYTE GetRawData() { return m_pData; }
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HRESULT SetSize( ULONG ulSize )
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{
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ULARGE_INTEGER uliSize;
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uliSize.LowPart = ulSize;
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uliSize.HighPart = 0;
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return SetSize( uliSize );
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}
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HRESULT Advance( ULONG ulMove )
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{
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LARGE_INTEGER dlibMove;
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dlibMove.LowPart = ulMove;
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dlibMove.HighPart = 0;
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return Seek( dlibMove, STREAM_SEEK_CUR, NULL );
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}
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HRESULT ReadLPWSTR( LPCWSTR& rwszStr );
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HRESULT WriteLPWSTR( LPCWSTR wszStr );
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//
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// IUnknown
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//
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STDMETHOD_(ULONG, AddRef)();
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STDMETHOD_(ULONG, Release)();
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STDMETHOD(QueryInterface)(REFIID riid, void** ppv);
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//
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// ISequentialStream
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//
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STDMETHOD(Read)( void *pv, ULONG cb, ULONG *pcbRead );
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STDMETHOD(Write)( const void *pv, ULONG cb, ULONG *pcbWritten);
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//
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// IStream
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//
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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 libNewSize );
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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 ) { return E_NOTIMPL; }
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STDMETHOD(Revert)( void) { return E_NOTIMPL; }
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STDMETHOD(LockRegion)( ULARGE_INTEGER libOffset,
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ULARGE_INTEGER cb,
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DWORD dwLockType ) { return E_NOTIMPL; }
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STDMETHOD(UnlockRegion)( ULARGE_INTEGER libOffset,
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ULARGE_INTEGER cb,
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DWORD dwLockType ) { return E_NOTIMPL; }
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STDMETHOD(Stat)( STATSTG *pstatstg, DWORD grfStatFlag );
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STDMETHOD(Clone)( IStream **ppstm );
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};
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#endif __BUFFER_H__
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