144 lines
3 KiB
C
144 lines
3 KiB
C
|
/*++
|
||
|
|
|
||
|
|
Copyright (C) 1996-2001 Microsoft Corporation
|
||
|
|
|
||
|
|
Module Name:
|
||
|
|
|
||
|
|
LAZY.H
|
||
|
|
|
||
|
|
Abstract:
|
||
|
|
|
||
|
|
History:
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
#ifndef __HMM_LAZY__H_
|
||
|
|
#define __HMM_LAZY__H_
|
||
|
|
|
||
|
|
#include <windows.h>
|
||
|
|
#include <providl.h>
|
||
|
|
#include <parmdefs.h>
|
||
|
|
|
||
|
|
template<class TInterface>
|
||
|
|
class CSource
|
||
|
|
{
|
||
|
|
RELEASE_ME TInterface* GetPointer();
|
||
|
|
};
|
||
|
|
|
||
|
|
template<class TInterface>
|
||
|
|
class CLazyInterface
|
||
|
|
{
|
||
|
|
private:
|
||
|
|
IUnknown* m_pObject;
|
||
|
|
REFIID m_iid;
|
||
|
|
TInterface* m_pNewInterface;
|
||
|
|
HRESULT m_hres;
|
||
|
|
|
||
|
|
public:
|
||
|
|
inline CLazyInterface(STORE IUnknown* pObject, REFIID riid)
|
||
|
|
: m_pObject(pObject), m_iid(riid), m_pNewInterface(NULL),
|
||
|
|
m_hres(S_OK)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
inline ~CLazyInterface()
|
||
|
|
{
|
||
|
|
if(m_pNewInterface) m_pNewInterface->Release();
|
||
|
|
}
|
||
|
|
inline INTERNAL TInterface* GetInterface()
|
||
|
|
{
|
||
|
|
if(m_pNewInterface == NULL)
|
||
|
|
{
|
||
|
|
m_hres = m_pObject->QueryInterface(m_iid,
|
||
|
|
(void**)&m_pNewInterface);
|
||
|
|
}
|
||
|
|
|
||
|
|
return m_pNewInterface;
|
||
|
|
}
|
||
|
|
inline HRESULT GetErrorCode()
|
||
|
|
{
|
||
|
|
return m_hres;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
class CLazyProperty
|
||
|
|
{
|
||
|
|
protected:
|
||
|
|
IHmmPropertySource* m_pSource;
|
||
|
|
LPWSTR m_wszPropName;
|
||
|
|
VARIANT m_vValue;
|
||
|
|
HRESULT m_hres;
|
||
|
|
|
||
|
|
public:
|
||
|
|
CLazyProperty(STORE IHmmPropertySource* pSource, STORE LPWSTR wszPropName)
|
||
|
|
: m_pSource(pSource), m_wszPropName(wszPropName), m_hres(S_OK)
|
||
|
|
{
|
||
|
|
VariantInit(&m_vValue);
|
||
|
|
}
|
||
|
|
~CLazyProperty(){}
|
||
|
|
|
||
|
|
inline INTERNAL const VARIANT& GetValue()
|
||
|
|
{
|
||
|
|
if(V_VT(&m_vValue) == VT_EMPTY)
|
||
|
|
{
|
||
|
|
m_hres = m_pSource->GetPropertyValue(m_wszPropName, 0, &m_vValue);
|
||
|
|
if(FAILED(m_hres))
|
||
|
|
{
|
||
|
|
V_VT(&m_vValue) = VT_ERROR;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return m_vValue;
|
||
|
|
}
|
||
|
|
inline HRESULT GetErrorCode()
|
||
|
|
{
|
||
|
|
GetValue();
|
||
|
|
return m_hres;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
class CLazyClassName : public CLazyProperty
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
inline CLazyClassName(STORE IHmmPropertySource* pSource)
|
||
|
|
: CLazyProperty(pSource, L"__CLASS")
|
||
|
|
{}
|
||
|
|
inline INTERNAL BSTR GetName()
|
||
|
|
{
|
||
|
|
GetValue();
|
||
|
|
if(FAILED(m_hres) || V_VT(&m_vValue) != VT_BSTR)
|
||
|
|
return NULL;
|
||
|
|
return V_BSTR(&m_vValue);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
class CLazyDerivation : public CLazyProperty
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
inline CLazyDerivation(STORE IHmmPropertySource* pSource)
|
||
|
|
: CLazyProperty(pSource, L"__DERIVATION")
|
||
|
|
{}
|
||
|
|
inline BOOL Contains(LPCWSTR wszName)
|
||
|
|
{
|
||
|
|
GetValue();
|
||
|
|
if(FAILED(m_hres) || V_VT(&m_vValue) != (VT_BSTR | VT_ARRAY))
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
SAFEARRAY* psa = V_ARRAY(&m_vValue);
|
||
|
|
long lLBound, lUBound;
|
||
|
|
SafeArrayGetLBound(psa, 1, &lLBound);
|
||
|
|
SafeArrayGetUBound(psa, 1, &lUBound);
|
||
|
|
BOOL bFound = FALSE;
|
||
|
|
for(long lIndex = lLBound; !bFound && lIndex <= lUBound; lIndex++)
|
||
|
|
{
|
||
|
|
BSTR strDerived;
|
||
|
|
SafeArrayGetElement(psa, &lIndex, &strDerived);
|
||
|
|
BOOL bFound = !_wcsicmp(strDerived, wszName);
|
||
|
|
SysFreeString(strDerived);
|
||
|
|
}
|
||
|
|
return bFound;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|