doubango-android/plugins/pluginDirectShow/internals/wince/CPropertyBag.cxx

#if defined(_WIN32_WCE)
//
// 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 <windows.h>
#include <Ocidl.h>
#include <oleauto.h>

#include "internals/wince/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<IPropertyBag*>(this);
    }
    else {
        return *ppv = 0, E_NOINTERFACE;
    }

    return AddRef(), S_OK;
}

#endif /* _WIN32_WCE */