cube-game-plus-plus/data/UnsortedArrayList.h

#ifndef UNSORTEDARRAYLIST_H
#define UNSORTEDARRAYLIST_H

#include <cstring>
#include <iostream>

template<class E>
class UnsortedArrayList
{
public:
    UnsortedArrayList()
    {
        data = new E[capacity];
    }
    
    virtual ~UnsortedArrayList()
    {
        delete[] data;
    }
    
    int getSize() const
    {
        return size;
    }
    
    void add(E e)
    {
        if(capacity <= size)
        {
            capacity *= 2;
            E* newData = new E[capacity];
            memcpy(newData, data, sizeof(E) * size);
            delete[] data;
            data = newData;
        }
        data[size] = e;
        size++;
    }
    
    void remove(E e)
    {
        int i = 0;
        while(i < size)
        {
            if(e == data[i])
            {
                if(i == size - 1)
                {
                    memset(data + i, 0, sizeof(E));
                }
                else
                {
                    data[i] = data[size - 1];
                    memset(data + size - 1, 0, sizeof(E));
                }
                size--;
            }
            else
            {
                i++;
            }
        }
    }
    
    void removeIndex(int index)
    {
        if(index >= 0 && index < size)
        {
            if(size == 1 || index == size - 1)
            {
                memset(data + index, 0, sizeof(E));
            }
            else
            {
                data[index] = data[size - 1];
                memset(data + size - 1, 0, sizeof(E));
            }
            size--;
        }
    }
    
    E get(int index, E error) const
    {
        if(index >= 0 && index < size)
        {
            return data[index];
        }
        return error;
    }
    
private:
    int size = 0;
    int capacity = 1;
    E* data;
};

#endif