Martijn van Oosterhout wrote:
On Sun, Dec 04, 2005 at 03:21:47PM +0300, Anton Nikiforov wrote:Martijn van Oosterhout wrote:Let i be your input. Calculate t = -i. If i is in the right format, t will have exactly one bit set. Test this with t <> 0 and (t & i) == t If that's ok, then your answer is 32 - log2(t) Have a nice day,Sorry, did not quite catch. t in this case is int, and there is no log2(int) function.....But there is a log(x,y) function, so log(2,t) would work also. Note that 255.255.255.0 stored as integer is -256. Have a nice day,
Thanks alot! Best regards, Anton
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