Re: MATH_MOD: Include in GLib?

[Sven Neumann <sven gimp org>]

Hi,

Daniel Brockman <drlion deepwood net> writes:

> > > Also note that your suggest macro won't work if x < m.
> 
> What do you mean?  Assuming that x % m == -(-x % m) whenever x < 0
> (which is allegedly machine-dependent), it works in all these cases,
> as far as I can tell, and x < m in all of them:

The behaviour for negative operands is by definition undefined. This
it doesn't make sense to make any assumptions about it. Any macro that
passes a negative operand to the C modulo operator is broken. No
matter how well it may seem to work.


Sven