On Feb 16, 2005, at 1:30 PM, Wouter van Ooijen wrote:

> But it (plus a few other C 'features') makes possible a programming
> construct that is at the same beatiful and ugly: the interleaved
> for/switch, which unrolls a for loop while (with the same code) 
> handling
> the left-over iterations. I forgot what it's called though.
>
I think you're talking about "Duff's device"

  send(to, from, count)
   register short *to, *from;
   register count;
   {
    register n=(count+7)/8;
    switch(count%8){
     case 0:do{*to = *from++;
     case 7:*to = *from++;
     case 6:*to = *from++;
     case 5:*to = *from++;
     case 4:*to = *from++;
     case 3:*to = *from++;
     case 2:*to = *from++;
     case 1:*to = *from++;
    }while(--n>0);
   }
  }
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