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LibJS: Protect DayWithinYear against non-finite times

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Timothy Flynn 2022-01-16 00:54:48 -05:00 • committed by Andreas Kling
parent 9be0a0fd28
commit 4848f587cd
1 changed files with 3 additions and 0 deletions
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Userland/Libraries/LibJS/Runtime/Date.cpp
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@ -63,6 +63,9 @@ String Date::iso_date_string() const
// DayWithinYear(t), https://tc39.es/ecma262/#eqn-DayWithinYear
u16 day_within_year(double t)
{
if (!Value(t).is_finite_number())
return 0;
// Day(t) - DayFromYear(YearFromTime(t))
return static_cast<u16>(day(t) - day_from_year(year_from_time(t)));
}