How to reverse bits

[vlad from moscow]

My five cents (which I have not:) )

unsigned int ReverseBits( unsigned int x )
{
	unsigned int y = 0;

	for ( int n = std::numeric_limits<unsigned int>::digits - 1; x; x >>= 1, --n )
	{
		if ( x & 1 ) y |= 1 << n;
	}

	return y;
}

[tnjgraham]

Thanks for all advice!!!