/* $Id$ */

/** @file overflowsafe_type.hpp An overflow safe integer-like type. */

#ifndef OVERFLOWSAFE_TYPE_HPP

#define OVERFLOWSAFE_TYPE_HPP

/**

 * Overflow safe template for integers, i.e. integers that will never overflow

 * you multiply the maximum value with 2, or add 2, or substract somethng from

 * the minimum value, etc.

 * @param T     the type these integers are stored with.

 * @param T_MAX the maximum value for the integers.

 * @param T_MIN the minimum value for the integers.

 */

template <class T, T T_MAX, T T_MIN>

class OverflowSafeInt

{

private:

	/** The non-overflow safe backend to store the value in. */

	T m_value;

public:

	OverflowSafeInt() : m_value(0) { }

	OverflowSafeInt(const OverflowSafeInt& other) { this->m_value = other.m_value; }

	OverflowSafeInt(const int64 int_)             { this->m_value = int_; }

	FORCEINLINE OverflowSafeInt& operator = (const OverflowSafeInt& other) { this->m_value = other.m_value; return *this; }

	FORCEINLINE OverflowSafeInt operator - () const { return OverflowSafeInt(-this->m_value); }