text: /*************************************************************************/
  /*  vset.h                                                               */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
  /*                                                                       */
  /* 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.*/
  /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
  /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
  /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
  /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
  /*************************************************************************/
  
  #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;
  		const T *a = &_data[0];
  		int middle = 0;
  
  #if DEBUG_ENABLED
  		if (low > high)
  			ERR_PRINT("low > high, this may be a bug");
  #endif
  
  		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
  