PersistPropertyBag.h

/*******************************************************************************
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* This file is part of the Ogg Vorbis DirectShow filter collection             *
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* Copyright (c) 2001, Tobias Waldvogel                                         *
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#ifndef __CPERSIST_PROPERTY_BAG__
#define __CPERSIST_PROPERTY_BAG__

#include <streams.h>
#define SIZEOF_ARRAY(ar)            (sizeof(ar)/sizeof((ar)[0]))

class CRegistryStuff
{
private:
	const GUID*		m_pClsID;
public:
	CRegistryStuff(const GUID* pClsID);
	HKEY	OpenRegistry();
	HRESULT	SaveToRegistry(const char* szName, bool bVal);
	HRESULT	SaveToRegistry(const char* szName, long iVal);
	HRESULT	SaveToRegistry(const char* szName, unsigned long iVal);
	HRESULT	SaveToRegistry(const char* szName, float fVal);
	HRESULT	SaveToRegistry(const char* szName, char* szVal);
	HRESULT	SaveToRegistry(const char* szName, wchar_t* wzVal);
	HRESULT	LoadFromRegistry(const char* szName, bool* pbVal, bool bDefault);
	HRESULT	LoadFromRegistry(const char* szName, long* piVal, long iDefault);
	HRESULT	LoadFromRegistry(const char* szName, unsigned long* piVal, unsigned long iDefault);
	HRESULT	LoadFromRegistry(const char* szName, float* pfVal, float fDefault);
};


class CPersistPropertyBag	: public IPersistPropertyBag
{
private:
	int				m_iProps;
	const char**	m_arProps;
	const GUID*		m_pClsID;
public:
	CPersistPropertyBag(const char** arProps, int iProps, const GUID* pClsID);

	HRESULT STDMETHODCALLTYPE			InitNew(void);
	HRESULT	STDMETHODCALLTYPE			GetClassID(CLSID *pClsID);
	HRESULT	STDMETHODCALLTYPE			Load(IPropertyBag *pPropBag, IErrorLog *pErrorLog);
	HRESULT STDMETHODCALLTYPE			Save(IPropertyBag *pPropBag, BOOL fClearDirty,
										 BOOL fSaveAllProperties);

	virtual HRESULT STDMETHODCALLTYPE Read(LPCOLESTR pszPropName, VARIANT *pVar, IErrorLog *pErrorLog) = 0;
	virtual HRESULT STDMETHODCALLTYPE Write(LPCOLESTR pszPropName, VARIANT *pVar) = 0;
};

#endif