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06593b1894
Now that we have the Temporal.PlainDate object, we can flesh out this AO for such relative-to objects.
84 lines
3.9 KiB
C++
84 lines
3.9 KiB
C++
/*
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* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
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* Copyright (c) 2021-2023, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2024, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/Temporal/AbstractOperations.h>
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#include <LibJS/Runtime/Temporal/Calendar.h>
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#include <LibJS/Runtime/Temporal/Instant.h>
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#include <LibJS/Runtime/Temporal/PlainDate.h>
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#include <LibJS/Runtime/Temporal/PlainDateTime.h>
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#include <LibJS/Runtime/Temporal/PlainTime.h>
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namespace JS::Temporal {
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// 5.5.3 CombineISODateAndTimeRecord ( isoDate, time ), https://tc39.es/proposal-temporal/#sec-temporal-combineisodateandtimerecord
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ISODateTime combine_iso_date_and_time_record(ISODate iso_date, Time time)
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{
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// 1. NOTE: time.[[Days]] is ignored.
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// 2. Return ISO Date-Time Record { [[ISODate]]: isoDate, [[Time]]: time }.
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return { .iso_date = iso_date, .time = time };
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}
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// nsMinInstant - nsPerDay
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static auto const DATETIME_NANOSECONDS_MIN = "-8640000086400000000000"_sbigint;
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// nsMaxInstant + nsPerDay
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static auto const DATETIME_NANOSECONDS_MAX = "8640000086400000000000"_sbigint;
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// 5.5.4 ISODateTimeWithinLimits ( isoDateTime ), https://tc39.es/proposal-temporal/#sec-temporal-isodatetimewithinlimits
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bool iso_date_time_within_limits(ISODateTime iso_date_time)
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{
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// 1. If abs(ISODateToEpochDays(isoDateTime.[[ISODate]].[[Year]], isoDateTime.[[ISODate]].[[Month]] - 1, isoDateTime.[[ISODate]].[[Day]])) > 10**8 + 1, return false.
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if (fabs(iso_date_to_epoch_days(iso_date_time.iso_date.year, iso_date_time.iso_date.month - 1, iso_date_time.iso_date.day)) > 100000001)
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return false;
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// 2. Let ns be ℝ(GetUTCEpochNanoseconds(isoDateTime)).
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auto nanoseconds = get_utc_epoch_nanoseconds(iso_date_time);
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// 3. If ns ≤ nsMinInstant - nsPerDay, then
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if (nanoseconds <= DATETIME_NANOSECONDS_MIN) {
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// a. Return false.
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return false;
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}
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// 4. If ns ≥ nsMaxInstant + nsPerDay, then
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if (nanoseconds >= DATETIME_NANOSECONDS_MAX) {
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// a. Return false.
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return false;
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}
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// 5. Return true.
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return true;
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}
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// 5.5.5 InterpretTemporalDateTimeFields ( calendar, fields, overflow ), https://tc39.es/proposal-temporal/#sec-temporal-interprettemporaldatetimefields
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ThrowCompletionOr<ISODateTime> interpret_temporal_date_time_fields(VM& vm, StringView calendar, CalendarFields& fields, Overflow overflow)
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{
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// 1. Let isoDate be ? CalendarDateFromFields(calendar, fields, overflow).
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auto iso_date = TRY(calendar_date_from_fields(vm, calendar, fields, overflow));
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// 2. Let time be ? RegulateTime(fields.[[Hour]], fields.[[Minute]], fields.[[Second]], fields.[[Millisecond]], fields.[[Microsecond]], fields.[[Nanosecond]], overflow).
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auto time = TRY(regulate_time(vm, *fields.hour, *fields.minute, *fields.second, *fields.millisecond, *fields.microsecond, *fields.nanosecond, overflow));
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// 3. Return CombineISODateAndTimeRecord(isoDate, time).
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return combine_iso_date_and_time_record(iso_date, time);
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}
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// 5.5.7 BalanceISODateTime ( year, month, day, hour, minute, second, millisecond, microsecond, nanosecond ), https://tc39.es/proposal-temporal/#sec-temporal-balanceisodatetime
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ISODateTime balance_iso_date_time(double year, double month, double day, double hour, double minute, double second, double millisecond, double microsecond, double nanosecond)
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{
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// 1. Let balancedTime be BalanceTime(hour, minute, second, millisecond, microsecond, nanosecond).
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auto balanced_time = balance_time(hour, minute, second, millisecond, microsecond, nanosecond);
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// 2. Let balancedDate be BalanceISODate(year, month, day + balancedTime.[[Days]]).
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auto balanced_date = balance_iso_date(year, month, day + balanced_time.days);
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// 3. Return CombineISODateAndTimeRecord(balancedDate, balancedTime).
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return combine_iso_date_and_time_record(balanced_date, balanced_time);
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}
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}
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