At the bottom, some of C's arithmetical rules are 'stupid'. Especially as regards type promotion. At least they're well-defined.
Absolutely true in a mathematical sense is that the difference between two unsigned numbers is SIGNED! But that's not what C does. You can get around this, easy enough, but you do have to understand exactly what is going on. It helps if you are working on a 2's-complement machine. Off the cuff, I think this works: unsigned int a, b; int delta; ... delta = (int)a - (int)b; if (delta < 0) delta = (int)b - (int)a; -or maybe- if (delta < 0) delta = -delta; -- Jim _______________________________________________ busybox mailing list busybox@busybox.net http://lists.busybox.net/mailman/listinfo/busybox
