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LibJS: Begin implementing the relativeTo option of Duration.compare

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Timothy Flynn 2024-11-22 17:26:53 -05:00 • committed by Andreas Kling
commit 0befd52725
Notes: github-actions[bot] 2024-11-23 13:47:08 +00:00
4 changed files with 55 additions and 3 deletions
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27
Libraries/LibJS/Runtime/Temporal/Duration.cpp
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@ -17,6 +17,7 @@
#include <LibJS/Runtime/Temporal/Duration.h>
#include <LibJS/Runtime/Temporal/DurationConstructor.h>
#include <LibJS/Runtime/Temporal/Instant.h>
#include <LibJS/Runtime/Temporal/PlainDate.h>
#include <LibJS/Runtime/Temporal/PlainDateTime.h>
#include <LibJS/Runtime/Temporal/TimeZone.h>
#include <LibJS/Runtime/VM.h>
@ -796,6 +797,32 @@ i8 time_duration_sign(TimeDuration const& time_duration)
return 0;
}
// 7.5.29 DateDurationDays ( dateDuration, plainRelativeTo ), https://tc39.es/proposal-temporal/#sec-temporal-datedurationdays
ThrowCompletionOr<double> date_duration_days(VM& vm, DateDuration const& date_duration, PlainDate const& plain_relative_to)
{
// 1. Let yearsMonthsWeeksDuration be ! AdjustDateDurationRecord(dateDuration, 0).
auto years_months_weeks_duration = MUST(adjust_date_duration_record(vm, date_duration, 0));
// 2. If DateDurationSign(yearsMonthsWeeksDuration) = 0, return dateDuration.[[Days]].
if (date_duration_sign(years_months_weeks_duration) == 0)
return date_duration.days;
// 3. Let later be ? CalendarDateAdd(plainRelativeTo.[[Calendar]], plainRelativeTo.[[ISODate]], yearsMonthsWeeksDuration, CONSTRAIN).
auto later = TRY(calendar_date_add(vm, plain_relative_to.calendar(), plain_relative_to.iso_date(), years_months_weeks_duration, Overflow::Constrain));
// 4. Let epochDays1 be ISODateToEpochDays(plainRelativeTo.[[ISODate]].[[Year]], plainRelativeTo.[[ISODate]].[[Month]] - 1, plainRelativeTo.[[ISODate]].[[Day]]).
auto epoch_days1 = iso_date_to_epoch_days(plain_relative_to.iso_date().year, plain_relative_to.iso_date().month - 1, plain_relative_to.iso_date().day);
// 5. Let epochDays2 be ISODateToEpochDays(later.[[Year]], later.[[Month]] - 1, later.[[Day]]).
auto epoch_days2 = iso_date_to_epoch_days(later.year, later.month - 1, later.day);
// 6. Let yearsMonthsWeeksInDays be epochDays2 - epochDays1.
auto years_months_weeks_in_days = epoch_days2 - epoch_days1;
// 7. Return dateDuration.[[Days]] + yearsMonthsWeeksInDays.
return date_duration.days + years_months_weeks_in_days;
}
// 7.5.30 RoundTimeDuration ( timeDuration, increment, unit, roundingMode ), https://tc39.es/proposal-temporal/#sec-temporal-roundtimeduration
ThrowCompletionOr<TimeDuration> round_time_duration(VM& vm, TimeDuration const& time_duration, Crypto::UnsignedBigInteger const& increment, Unit unit, RoundingMode rounding_mode)
{