> >   /* This algorithm for FFS was devised by D. Seal and posted to
> >    * comp.sys.arm on 16 Feb 1994.
> >    */
> 
> Sounds good.  I'm never too sure on copyright/legal issues, and certainly as 
> it is his magic number for ffs he should be credited.

It's a minefield :-)

> 
> > I've just found the original posting in my copious archives ;-)  I've
> > appended the relevant part of it below for the curious.
> 
> Better archive than the one on dejanews, it doesn't go that far back for 
> comp.sys.arm.
> 

My archive is somewhat selective.  It just so happens that I kept a record 
of this particular thread since i) I started it; ii) The solution was 
particularly neat; iii) I had no practical use for the solution at the 
time ;-)

R.