IArray.h

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/*

AmnesiaEngine
Copyright (c) 2006 John DiSanti.

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 AMN_IARRAY_H
#define AMN_IARRAY_H

#include <string.h>

namespace amn
{

template<class T>
class IArray
{
protected:
        T* elements;
        unsigned int allocated, used;
public:
        IArray() 
        {
                allocated = 5;
                elements = new T[allocated];
                used = 0;               
        }
        IArray(const int n) 
        {
                allocated = n;
                elements = new T[allocated];
                used = 0;
        }
        IArray(const IArray& a) 
        {
                allocated = a.size()+5;
                used = a.size();

                elements = new T[allocated];
                memcpy(elements, &a[0], used);
        }
        virtual ~IArray() 
        {
                delete [] elements;
        }

        virtual T& operator [] (const unsigned int index)
        {
                return elements[index];
        }
        /*virtual const T& operator [] (unsigned int index)
        {
                return (const T)elements[index];
        }*/

        virtual IArray operator = (IArray& a)
        {
                clear();
                allocated = a.size()+5;
                used = a.size();

                elements = new T[allocated];
                memcpy(elements, &a[0], used);
        }

        virtual bool operator == (IArray& a2)
        {
                if(size() != a2.size())
                        return false;

                unsigned int i;
                for(i = 0; i < size(); i++)
                {
                        if(memcmp(&elements[i], &a2[i], sizeof(T)) != 0)
                                return false;
                } 

                return true;
        }
        virtual bool operator != (IArray& a2)
        {
                return !(*this == a2);
        }

        virtual unsigned int size()
        {
                return used;
        }
        virtual bool empty()
        {
                return (used == 0);
        }

        virtual void push_back(const T& x)
        {
                if(used >= allocated)
                {
                        allocated += 10;
                        T* elem = new T[allocated];

                        unsigned int i;
                        for(i = 0; i < used; i++)
                                elem[i] = elements[i];

                        delete [] elements;
                        elements = elem;
                }

                T e = x;
                elements[used] = e;
                used++;
        }
        virtual void pop_back()
        {
                used--;
        }

        virtual void clear()
        {
                delete [] elements;
                used = 0;
                allocated = 5;
                elements = new T[allocated];
        }
};

};

#endif//AMN_IARRAY_H

/* End of File */

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