I think this discussion is suffering from the desire to
over-generalize.
Armin, can you show us how to multiply two nonnegative ints together
with an overflow "block" as Tim suggested earlier? I.e. a macro
callable as
SAFE_MULTIPLY(destination, src1, src2, on_overflow);
meaning roughly
destination = src1 * src2;
if (<overflow detected>)
on_overflow;
I currently use something like this as the overflow test in a few places:
if (src1 && destination / src1 != src2)
but as Tim points out the division can kill us unless src1 is a
constant... How would you spell this without doing a division?
--Guido van Rossum (home page: http://www.python.org/~guido/)
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