Form Designer

// AutoItemInfoPtr.h: interface for the CAutoItemInfoPtr class.
//
// Author : David Shepherd
//			Copyright (c) 2002, DaeDoe-Software
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_AUTOITEMINFOPTR_H__8CE4B024_2EEE_11D6_B6A6_FB1C95524145__INCLUDED_)
#define AFX_AUTOITEMINFOPTR_H__8CE4B024_2EEE_11D6_B6A6_FB1C95524145__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

/////////////////////////////////////////////////////////////////////////////
// CAutoItemInfoPtr
class CAutoItemInfoPtr
{
private:
	// this will be set TRUE if we own the item info pointer
	BOOL m_Owns;
	// the item info pointer
	CItemInfo *m_pItemInfo;
public:
	explicit CAutoItemInfoPtr(CItemInfo *pItemInfo=NULL) :
		m_Owns((pItemInfo==NULL) ? FALSE : TRUE),
		m_pItemInfo(pItemInfo)
	{}
	CAutoItemInfoPtr(CAutoItemInfoPtr &Obj) :
		m_Owns(Obj.m_Owns),
		m_pItemInfo(Obj.Release())
	{}
	~CAutoItemInfoPtr()
	{
		// free the item info
		if(m_Owns)
		{
			CItemInfo::DeleteObject(m_pItemInfo);
		}
	}
	const CAutoItemInfoPtr &operator=(CAutoItemInfoPtr &Obj)
	{
		// check for self assignment
		if(this==&Obj)
		{
			return *this;
		}
		// assign from a different item info pointer
		if(m_pItemInfo!=Obj.Get())
		{
			if(m_Owns)
			{
				CItemInfo::DeleteObject(m_pItemInfo);
			}
			m_Owns=Obj.m_Owns;
		}
		// assign from the same item info pointer
		else if(Obj.m_Owns)
		{
			m_Owns=TRUE;
		}
		return m_pItemInfo=Obj.Release(), *this;
	}
	CItemInfo *Release()
	{
		// release ownership
		m_Owns=FALSE;
		// return the item info pointer
		return m_pItemInfo;
	}
	CItemInfo *Get() const
	{
		// return the item info pointer
		return m_pItemInfo;
	}
	operator CItemInfo *() const
	{
		// return the item info pointer
		return m_pItemInfo;
	}
	CItemInfo *operator->()
	{
		// return the item info pointer
		return m_pItemInfo;
	}
};

#endif // !defined(AFX_AUTOITEMINFOPTR_H__8CE4B024_2EEE_11D6_B6A6_FB1C95524145__INCLUDED_)