www.pudn.com > QRAPPuie.rar > CPropertyBag.cpp

// 
// Copyright (c) Microsoft Corporation.?All rights reserved. 
// 
// 
// Use of this source code is subject to the terms of the Microsoft end-user 
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT. 
// If you did not accept the terms of the EULA, you are not authorized to use 
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your 
// install media. 
// 
#include "stdafx.h" 
#include  
#include  
#include  
 
#include "cpropertybag.h" 
 
CPropertyBag::CPropertyBag() : _refCount(1), pVar(0) 
{        
} 
 
CPropertyBag::~CPropertyBag() 
{ 
    VAR_LIST *pTemp = pVar; 
///    HRESULT hr = S_OK; 
     
    while(pTemp) 
    { 
        VAR_LIST *pDel = pTemp; 
        VariantClear(&pTemp->var); 
        SysFreeString(pTemp->pBSTRName); 
        pTemp = pTemp->pNext; 
        delete pDel; 
    } 
 
} 
 
HRESULT STDMETHODCALLTYPE 
CPropertyBag::Read(LPCOLESTR pszPropName,  
                       VARIANT *_pVar,  
                       IErrorLog *pErrorLog) 
{ 
    VAR_LIST *pTemp = pVar; 
    HRESULT hr = S_OK; 
     
    while(pTemp) 
    { 
        if(0 == wcscmp(pszPropName, pTemp->pBSTRName)) 
        { 
            hr = VariantCopy(_pVar, &pTemp->var); 
            break; 
        } 
        pTemp = pTemp->pNext; 
    } 
    return hr; 
} 
 
 
HRESULT STDMETHODCALLTYPE 
CPropertyBag::Write(LPCOLESTR pszPropName,  
                            VARIANT *_pVar) 
{ 
///    HRESULT hr = S_OK; 
    VAR_LIST *pTemp = new VAR_LIST(); 
    ASSERT(pTemp); 
 
    if( !pTemp ) 
    { 
        return E_OUTOFMEMORY; 
    } 
 
    VariantInit(&pTemp->var); 
    pTemp->pBSTRName = SysAllocString(pszPropName); 
    pTemp->pNext = pVar; 
    pVar = pTemp; 
    return VariantCopy(&pTemp->var, _pVar); 
} 
 
ULONG STDMETHODCALLTYPE  
CPropertyBag::AddRef()  
{ 
    return InterlockedIncrement((LONG *)&_refCount); 
} 
 
ULONG STDMETHODCALLTYPE  
CPropertyBag::Release()  
{ 
    ASSERT(_refCount != 0xFFFFFFFF); 
    ULONG ret = InterlockedDecrement((LONG *)&_refCount);     
    if(!ret)  
        delete this;  
    return ret; 
} 
 
HRESULT STDMETHODCALLTYPE  
CPropertyBag::QueryInterface(REFIID riid, void** ppv)  
{ 
    if(!ppv)  
        return E_POINTER; 
    if(riid == IID_IPropertyBag)  
        *ppv = static_cast(this);	 
    else  
        return *ppv = 0, E_NOINTERFACE; 
     
    return AddRef(), S_OK;	 
}