virtualx-engine/core/vset.h

/*************************************************************************/
/*  vset.h                                                               */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
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/*************************************************************************/
#ifndef VSET_H
#define VSET_H

#include "typedefs.h"
#include "vector.h"

template<class T>
class VSet {


	Vector<T> _data;

	_FORCE_INLINE_ int _find(const T& p_val,bool &r_exact) const {

		r_exact=false;
		if (_data.empty())
			return 0;

		int low = 0;
		int high = _data.size() -1;
		int middle;
		const T *a=&_data[0];

		while( low <= high )
		{
			middle = ( low  + high ) / 2;

			if( p_val < a[ middle] ) {
				high = middle - 1; //search low end of array
			} else if ( a[middle] < p_val) {
				low = middle + 1; //search high end of array
			} else {
				r_exact=true;
				return middle;
			}
		}

		//return the position where this would be inserted
		if (a[middle]<p_val)
			middle++;
		return middle;
	}

	_FORCE_INLINE_ int _find_exact(const T& p_val) const {

		if (_data.empty())
			return -1;

		int low = 0;
		int high = _data.size() -1;
		int middle;
		const T *a=&_data[0];

		while( low <= high )
		{
			middle = ( low  + high ) / 2;

			if( p_val < a[ middle] ) {
				high = middle - 1; //search low end of array
			} else if ( a[middle] < p_val) {
				low = middle + 1; //search high end of array
			} else {
				return middle;
			}
		}

		return -1;
	}

public:

	void insert(const T& p_val) {

		bool exact;
		int pos = _find(p_val,exact);
		if (exact)
			return;
		_data.insert(pos,p_val);
	}

	bool has(const T& p_val) const {

		return _find_exact(p_val)!=-1;
	}

	void erase(const T& p_val) {

		int pos = _find_exact(p_val);
		if (pos<0)
			return;
		_data.remove(pos);
	}

	int find(const T& p_val) const {

		return _find_exact(p_val);

	}

	_FORCE_INLINE_ bool empty() const { return _data.empty(); }

	_FORCE_INLINE_ int size() const { return _data.size(); }

	inline T& operator[](int p_index) {

		return _data[p_index];
	}

	inline const T& operator[](int p_index) const {

		return _data[p_index];
	}


};

#endif // VSET_H