vset.h

/*************************************************************************/
/*  vset.h                                                               */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
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/* 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   */
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/* distribute, sublicense, and/or sell copies of the Software, and to    */
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/* the following conditions:                                             */
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/* The above copyright notice and this permission notice shall be        */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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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