Visual Studio 2013 #1
Description
Well, it doesn't compile on Visual Studio 2013 (thanks to your ROT implementation), by ignoring Visual Studio you ignore a large group of programmers.
I hope that sticking with your own version of bit rotation algorithm was worth losing of so many potential users...
PS. Your algorithm is slow compared to original rand(), 64 bit multiplication generates external call to _allmul when compiled on 32 bits.