/////////////////////////////////////////////////////////////////////////////
//
//  OPC Trend VC++ Client:	IOPCSyncIO.CPP
//							(Source File)
//
/////////////////////////////////////////////////////////////////////////////
//
//          Author: Raphael Imhof
//    Initial Date: 11/04/98
//       $Workfile: IOPCSyncIO.cpp $
//       $Revision: 1 $
//           $Date: 7/27/99 5:24p $
//   Target System: Microsoft Windows NT 4.0
//     Environment: Visual C++ 5.0 / OPC DataAccess 1.0 / 2.0
//         Remarks: 
//
/////////////////////////////////////////////////////////////////////////////
//
//     Description: implementation of the CIOPCSyncIO class.
//					IOPCSyncIO wrapper.
//					
//
/////////////////////////////////////////////////////////////////////////////
//
//  History of Changes     (Please remove very old comments and blank lines!)
//            $Log: /IDK/OPCServer/clients/VC++/Trend/IOPCSyncIO.cpp $
// 
// 1     7/27/99 5:24p Imhof
// 
// 1     7/27/99 5:19p Imhof
// 
// 4     1/15/99 7:04p Imhof
// Updated legal notice.
// 
// 3     12/15/98 10:30a Imhof
// Modifications for OPC 2.0
// 
// 2     11/06/98 5:53p Imhof
// Added header, comment and made some small code changes.
// 
// 
//  $Nokeywords:$ (To avoid useless search while checking in.)
/////////////////////////////////////////////////////////////////////////////
//  Copyright (C) 1998, Siemens Building Technologies, Inc. Landis Division
//
// SIEMENS BUILDING TECHNOLOGIES, INC. IS PROVIDING THE FOLLOWING
// EXAMPLES OF CODE AS SAMPLE ONLY.
//
// SIEMENS BUILDING TECHNOLOGIES, INC.  MAKES NO REPRESENTATIONS
// OR WARRANTIES OF ANY KIND  WITH RESPECT TO THE VALIDTY OF THE 
// CODES   OR   DESIRED   RESULTS   AND   DISCLAIMS   ALL   SUCH 
// REPRESENTATIONS   AND   WARRANTIES,  INCLUDING  FOR  EXAMPLE, 
// WARRANTIES  OF  MERCHANTABILITY  AND FITNESS FOR A PARTICULAR 
// PURPOSE.    SIEMENS  BUILIDNG  TECHNOLOGIES,  INC.  DOES  NOT 
// REPRESENT  OR  WARRANT  THAT  THE  FOLLOWING CODE SAMPLES ARE 
// ACCURATE, VALID, COMPLETE OR CURRENT.
//
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "IOPCSyncIO.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CIOPCSyncIO::CIOPCSyncIO(CComPtr<IOPCSyncIO> pOPCSyncIO)
{
	m_pOPCSyncIO = pOPCSyncIO;
}

CIOPCSyncIO::CIOPCSyncIO(CComPtr<IOPCGroupStateMgt> pOPCGroup)
{
	if(FAILED(pOPCGroup->QueryInterface(IID_IOPCSyncIO, (void**)&m_pOPCSyncIO)))
	{
		m_pOPCSyncIO = NULL;
		TRACE("CIOPCSyncIO() \n");
	}
}

CIOPCSyncIO::~CIOPCSyncIO()
{

}

HRESULT CIOPCSyncIO::Read(	OPCDATASOURCE   dwSource,
							DWORD	        dwNumItems,
							OPCHANDLE*		phServer,
							OPCITEMSTATE**	ppItemValues,
							HRESULT**		ppErrors )
{
	if(m_pOPCSyncIO == NULL)
		return E_FAIL;

	HRESULT hr = m_pOPCSyncIO->Read(dwSource, dwNumItems, phServer, ppItemValues, ppErrors );

	if( FAILED( hr ) )
		TRACE(_T("IOPCSyncIO::Read\n"));
     
	return hr; 
}

HRESULT CIOPCSyncIO::Write(	DWORD	        dwNumItems,
							OPCHANDLE*		phServer,
							VARIANT*		pItemValues,
							HRESULT**		ppErrors )
{
	if(m_pOPCSyncIO == NULL)
		return E_FAIL;

	HRESULT hr = m_pOPCSyncIO->Write(dwNumItems, phServer, pItemValues, ppErrors);

	if( FAILED( hr ) )
		TRACE(_T("IOPCSyncIO::Write\n"));
     
	return hr; 
}