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ROUNDUP keeps #NUM! past the number range; only toward-zero rounding returns 0 

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Brandon Thomas 2026-10-12 23:29:56 -04:00
parent 555635e13e
commit 4941bf8da0
1 changed files with 3 additions and 2 deletions
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5
crates/functions/src/math.rs
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@ -75,10 +75,11 @@ fn round_dir(x: f64, digits: i32, up: bool) -> f64 {
}
let s = clean(scaled);
let r = if up { s.ceil() } else { s.floor() };
// r == 0 with an infinite scale would be 0 * inf = NaN (#NUM!); the result is simply zero.
// Toward zero, r == 0 with an infinite scale would be 0 * inf = NaN (#NUM!); the result is simply
// zero. Away from zero the true result (10^309 or more) is not a number, so ROUNDUP stays #NUM!.
let out = if !neg {
clean(r / f)
} else if r == 0.0 {
} else if r == 0.0 && !up {
0.0
} else {
r * f