On Sun, Dec 04, 2005 at 02:09:53PM +0300, Anton Nikiforov wrote: > Sorry for my stupidity but, maybe there is a function that converts mask > stored in int format to a numer of bits? ;) > Your function easyly convert this mask to dot decimal notation, but how > to count the number of 1 in it?
No, but you can write one the same way like so: 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, -- Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/ > Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a > tool for doing 5% of the work and then sitting around waiting for someone > else to do the other 95% so you can sue them.
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