source-engine/common/GameUI/ObjectList.h

//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
// $NoKeywords: $
//
//=============================================================================//
// ObjectList.h: interface for the ObjectList class.
//
//////////////////////////////////////////////////////////////////////

#ifndef OBJECTLIST_H
#define OBJECTLIST_H

#pragma once

#include "IObjectContainer.h"	// Added by ClassView

class ObjectList : public IObjectContainer  
{
public:
	void	Init();
	bool	Add( void * newObject );
	void *	GetFirst();
	void *	GetNext();
	


	ObjectList();
	virtual ~ObjectList();

	void	Clear( bool freeElementsMemory );
	int		CountElements();
	void *	RemoveTail();
	void *	RemoveHead();

	bool	AddTail(void * newObject);
	bool	AddHead(void * newObject);
	bool	Remove(void * object);
	bool	Contains(void * object);
	bool	IsEmpty();

	typedef struct element_s {
		element_s *	prev;	// pointer to the last element or NULL
		element_s *	next;	// pointer to the next elemnet or NULL
		void *		object;	// the element's object
	} element_t;

protected:

	element_t *	head;	// first element in list
	element_t *	tail;	// last element in list
	element_t *	current; // current element in list
	int			number;

};

#endif // !defined