Mark Dickinson <dicki...@gmail.com> added the comment:
I agree it would be nice to fix this. We could either (1) alter delta_new so
that the final round uses round-to-nearest; this would give the desired
behaviour in most cases, but there would still be a small possibility of
rounding going in the wrong direction as a result of accumulated errors in
'leftover_us'. Or (2) rewrite delta_new to do correct rounding in all cases,
by using integer arithmetic where necessary.
(2) seems like overkill to me.
For (1), it looks like it would be enough just to replace the round_to_long
function with:
static long
round_to_long(double x)
{
return (long)round(x);
}
Actually, at this point, one might as well just inline round_to_long.
Note that round_to_long is also called from datetime_from_timestamp.
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue8860>
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