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ilockbyt.cpp
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C/C++ Source or Header
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1996-05-21
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4KB
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229 lines
/*
* ILOCKBYT.H
*
* Template ILockBytes interface implementation.
*
* Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
*
* Kraig Brockschmidt, Microsoft
* Internet : kraigb@microsoft.com
* Compuserve: >INTERNET:kraigb@microsoft.com
*/
#include "ilockbyt.h"
/*
* CImpILockBytes::CImpILockBytes
* CImpILockBytes::~CImpILockBytes
*
* Parameters (Constructor):
* pObj LPVOID of the object we're in.
* pUnkOuter LPUNKNOWN to which we delegate.
*/
CImpILockBytes::CImpILockBytes(LPVOID pObj, LPUNKNOWN pUnkOuter)
{
m_cRef=0;
m_pObj=pObj;
m_pUnkOuter=pUnkOuter;
return;
}
CImpILockBytes::~CImpILockBytes(void)
{
return;
}
/*
* CImpILockBytes::QueryInterface
* CImpILockBytes::AddRef
* CImpILockBytes::Release
*
* Purpose:
* Delegating IUnknown members for CImpILockBytes.
*/
STDMETHODIMP CImpILockBytes::QueryInterface(REFIID riid
, LPVOID *ppv)
{
return m_pUnkOuter->QueryInterface(riid, ppv);
}
STDMETHODIMP_(ULONG) CImpILockBytes::AddRef(void)
{
++m_cRef;
return m_pUnkOuter->AddRef();
}
STDMETHODIMP_(ULONG) CImpILockBytes::Release(void)
{
--m_cRef;
return m_pUnkOuter->Release();
}
/*
* CImpILockBytes::ReadAt
*
* Purpose:
* Reads bytes from the byte array starting at a specific position.
*
* Parameters:
* ulOffset ULARGE_INTEGER specifying the offset at which
* to read.
* pv void HUGEP * into which to read the information.
* cb ULONG number of bytes to read
* pcbRead ULONG * in which to store the number of bytes
* read
*/
STDMETHODIMP ReadAt(ULARGE_INTEGER ulOffset, VOID HUGEP *pv
, ULONG cb, ULONG *pcbRead)
{
return ResultFromScode(E_NOTIMPL);
}
/*
* CImpILockBytes::WriteAt
*
* Purpose:
* Writes bytes into the byte array starting at a specific position.
*
* Parameters:
* ulOffset ULARGE_INTEGER specifying the offset at which
* to write.
* pv void HUGEP * to the information to write.
* cb ULONG number of bytes to write
* pcbWritten ULONG * in which to store the number of bytes
* written.
*/
STDMETHODIMP WriteAt(ULARGE_INTEGER ulOffset, VOID HUGEP *pv
, ULONG cb, ULONG *pcbWritten)
{
return ResultFromScode(E_NOTIMPL);
}
/*
* CImpILockBytes::Flush
*
* Purpose:
* Insures that any internal buffers are written to the underlying
* storage.
*
* Parameters:
* None
*/
STDMETHODIMP Flush(void)
{
return ResultFromScode(E_NOTIMPL);
}
/*
* CImpILockBytes::SetSize
*
* Purpose:
* Changes the size of the byte array.
*
* Parameters:
* cb ULARGE_INTEGER specifying the size to set.
*/
STDMETHODIMP SetSize(ULARGE_INTEGER cb)
{
return ResultFromScode(E_NOTIMPL);
}
/*
* CImpILockBytes::LockRegion
*
* Purpose:
* Locks a range of bytes in the byte array.
*
* Parameters:
* libOffset ULARGE_INTEGER at which to start the lock.
* cb ULARGE_INTEGER number of bytes to lock.
* dwLockType DWORD the type of lock access.
*/
STDMETHODIMP LockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb
, DWORD dwLockType)
{
return ResultFromScode(E_NOTIMPL);
}
/*
* CImpILockBytes::UnlockRegion
*
* Purpose:
* Unlocks a range of bytes in the byte array.
*
* Parameters:
* libOffset ULARGE_INTEGER at which to start the unlock.
* cb ULARGE_INTEGER number of bytes to unlock.
* dwLockType DWORD the type of lock access.
*/
STDMETHODIMP UnlockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb
, DWORD dwLockType)
{
return ResultFromScode(E_NOTIMPL);
}
/*
* CImpILockBytes::Stat
*
* Purpose:
* Returns relevant statistics about the byte array.
*
* Parameters:
* pstatstg LPSTATSTG in which to store the statistics.
* grfStatFlag DWORD specifying the level of information
* requested.
*/
STDMETHODIMP Stat(STATSTG *pstatstg, DWORD grfStatFlag)
{
return ResultFromScode(E_NOTIMPL);
}