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Division for negative number was rounding up #71

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Jul 8, 2024
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Division for negative number was rounding up #71

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19 changes: 12 additions & 7 deletions src/neospy_core/src/time/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -123,13 +123,13 @@ impl Time<UTC> {

let mut l = offset.div_euclid(1.0) as i64 + 68569;

let n = (4 * l) / 146097;
l -= (146097 * n + 3) / 4;
let i = (4000 * (l + 1)) / 1461001;
l -= (1461 * i) / 4 - 31;
let k = (80 * l) / 2447;
let day = l - (2447 * k) / 80;
l = k / 11;
let n = (4 * l).div_euclid(146097);
l -= (146097 * n + 3).div_euclid(4);
let i = (4000 * (l + 1)).div_euclid(1461001);
l -= (1461 * i).div_euclid(4) - 31;
let k = (80 * l).div_euclid(2447);
let day = l - (2447 * k).div_euclid(80);
l = k.div_euclid(11);

let month = k + 2 - 12 * l;
let year = 100 * (n - 49) + i + l;
Expand Down Expand Up @@ -223,6 +223,11 @@ mod tests {

let t2 = Time::<UTC>::from_year_month_day(763, 9, 18, 0.5);
assert!(t2.jd == 2000000.);

let ymd = Time::<UTC>::new(-68774.4991992591).year_month_day();
assert!(ymd.0 == -4901);
assert!(ymd.1 == 8);
assert!(ymd.2 == 8);
}

#[test]
Expand Down
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