root/core/avmplusStack.h

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#ifndef __avmplus_Stack__
#define __avmplus_Stack__


namespace avmplus
{
        /**
         * The Stack<T> template implements a simple stack, which can
         * be templated to support different types.
         */
        template <class T>
        class Stack
        {
        public:
                enum { kInitialCapacity = 128 };
                
                Stack()
                {
                        data = new T[kInitialCapacity];
                        len = 0;
                        max = kInitialCapacity;
                }
                virtual ~Stack()
                {
                        delete [] data;
                }
                void add(T value)
                {
                        if (len >= max) {
                                grow();
                        }
                        data[len++] = value;
                }
                bool isEmpty()
                {
                        return len == 0;
                }
                T pop()
                {
                        return data[--len];
                }
                void reset()
                {
                        len = 0;
                }
                int size()
                {
                        return len;
                }

        private:
                T *data;
                int len;
                int max;

                void grow()
                {
                        int newMax = max * 5 / 4;
                        T *newData = new T[newMax];
                        for (int i=0; i<len; i++) {
                                newData[i] = data[i];
                        }
                        delete [] data;
                        data = newData;
                        max = newMax;
                }
        };
}

#endif /* __avmplus_Stack__ */