Class Int

extern/ttmath/ttmathint.h:63–1931

*/
template<uint value_size>
class Int : public UInt<value_size>
{
public:

	/*!
		this method sets the max value which this class can hold
		(all bits will be one besides the last one)
	*/
	void SetMax()
	{
		UInt<value_size>::SetMax();
		UInt<value_size>::table[value_size-1] = ~ TTMATH_UINT_HIGHEST_BIT;
	}


	/*!
		this method sets the min value which this class can hold
		(all bits will be zero besides the last one which is one)
	*/
	void SetMin()
	{
		UInt<value_size>::SetZero();
		UInt<value_size>::table[value_size-1] = TTMATH_UINT_HIGHEST_BIT;
	}


	/*!
		this method sets -1 as the value
		(-1 is equal the max value in an unsigned type)
	*/
	void SetSignOne()
	{
		UInt<value_size>::SetMax();
	}


	/*!
		we change the sign of the value

		if it isn't possible to change the sign this method returns 1
		else return 0 and changing the sign
	*/
	uint ChangeSign()
	{
		/*
			if the value is equal that one which has been returned from SetMin
			(only the highest bit is set) that means we can't change sign
			because the value is too big (bigger about one)

			e.g. when value_size = 1 and value is -2147483648 we can't change it to the
			2147483648 because the max value which can be held is 2147483647

			we don't change the value and we're using this fact somewhere in some methods
			(if we look on our value without the sign we get the correct value 
			eg. -2147483648 in Int<1> will be 2147483648 on the UInt<1> type)
		*/
		if( UInt<value_size>::IsOnlyTheHighestBitSet() )
			return 1;