#pragma once

#include <stdlib.h>

template <class T, size_t S>
class DopeStack{
  static const size_t size = S;
  T stack[S];
  T* head;
  size_t occupancy;
public:
  DopeStack();
  T pop();
  void push(T item);
  T peek();
  size_t getOccupancy(){return occupancy;}
  bool isEmpty();
};

// Implementation ____________________________________________________

template <class T, size_t S>
DopeStack<T, S>::DopeStack():
  head (&stack[0]),
  occupancy(0)
{

}

template <class T, size_t S>
T DopeStack<T, S>::pop(){
  T ret = *head;
  if(head != &stack[0]){
    head--;
  }

  occupancy--;
  return ret;
}

template <class T, size_t S>
void DopeStack<T, S>::push(T item){
  if(occupancy != 0){
    head++;
  }

  *head = item;
  occupancy++;
}

template <class T, size_t S>
T DopeStack<T, S>::peek(){
  return *head;
}

template <class T, size_t S>
bool DopeStack<T, S>::isEmpty(){
  return (occupancy == 0);
}