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672a555f98
The changes to tests are due to LibTimeZone incorrectly interpreting
time stamps in the TZDB. The TZDB will list zone transitions in either
UTC or the zone's local time (which is then subject to DST offsets).
LibTimeZone did not handle the latter at all.
For example:
The following rule is in effect until November 18, 6PM UTC.
America/Chicago -5:50:36 - LMT 1883 Nov 18 18:00u
The following rule is in effect until March 1, 2AM in Chicago time. But
at that time, a DST transition occurs, so the local time is actually
3AM.
America/Chicago -6:00 Chicago C%sT 1936 Mar 1 2:00
89 lines
3.2 KiB
C++
89 lines
3.2 KiB
C++
/*
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* Copyright (c) 2020-2022, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2022-2024, Tim Flynn <trflynn89@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibCrypto/BigInt/SignedBigInteger.h>
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#include <LibJS/Runtime/Object.h>
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#include <LibUnicode/TimeZone.h>
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namespace JS {
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class Date final : public Object {
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JS_OBJECT(Date, Object);
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JS_DECLARE_ALLOCATOR(Date);
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public:
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static NonnullGCPtr<Date> create(Realm&, double date_value);
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// Out of line to ensure we have a key function
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virtual ~Date() override;
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double date_value() const { return m_date_value; }
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void set_date_value(double value) { m_date_value = value; }
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ErrorOr<String> iso_date_string() const;
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private:
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Date(double date_value, Object& prototype);
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double m_date_value { 0 }; // [[DateValue]]
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};
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// 21.4.1.22 Time Zone Identifier Record, https://tc39.es/ecma262/#sec-time-zone-identifier-record
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struct TimeZoneIdentifier {
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String identifier; // [[Identifier]]
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String primary_identifier; // [[PrimaryIdentifier]]
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};
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// https://tc39.es/ecma262/#eqn-HoursPerDay
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constexpr inline double hours_per_day = 24;
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// https://tc39.es/ecma262/#eqn-MinutesPerHour
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constexpr inline double minutes_per_hour = 60;
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// https://tc39.es/ecma262/#eqn-SecondsPerMinute
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constexpr inline double seconds_per_minute = 60;
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// https://tc39.es/ecma262/#eqn-msPerSecond
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constexpr inline double ms_per_second = 1'000;
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// https://tc39.es/ecma262/#eqn-msPerMinute
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constexpr inline double ms_per_minute = 60'000;
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// https://tc39.es/ecma262/#eqn-msPerHour
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constexpr inline double ms_per_hour = 3'600'000;
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// https://tc39.es/ecma262/#eqn-msPerDay
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constexpr inline double ms_per_day = 86'400'000;
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// https://tc39.es/proposal-temporal/#eqn-nsPerDay
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constexpr inline double ns_per_day = 86'400'000'000'000;
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extern Crypto::SignedBigInteger const ns_per_day_bigint;
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double day(double);
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double time_within_day(double);
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u16 days_in_year(i32);
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double day_from_year(i32);
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double time_from_year(i32);
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i32 year_from_time(double);
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u16 day_within_year(double);
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bool in_leap_year(double);
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u8 month_from_time(double);
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u8 date_from_time(double);
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u8 week_day(double);
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u8 hour_from_time(double);
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u8 min_from_time(double);
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u8 sec_from_time(double);
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u16 ms_from_time(double);
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Crypto::SignedBigInteger get_utc_epoch_nanoseconds(i32 year, u8 month, u8 day, u8 hour, u8 minute, u8 second, u16 millisecond, u16 microsecond, u16 nanosecond);
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Vector<Crypto::SignedBigInteger> get_named_time_zone_epoch_nanoseconds(StringView time_zone_identifier, i32 year, u8 month, u8 day, u8 hour, u8 minute, u8 second, u16 millisecond, u16 microsecond, u16 nanosecond);
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Unicode::TimeZoneOffset get_named_time_zone_offset_nanoseconds(StringView time_zone_identifier, Crypto::SignedBigInteger const& epoch_nanoseconds);
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String system_time_zone_identifier();
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double local_time(double time);
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double utc_time(double time);
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double make_time(double hour, double min, double sec, double ms);
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double make_day(double year, double month, double date);
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double make_date(double day, double time);
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double time_clip(double time);
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bool is_time_zone_offset_string(StringView offset_string);
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double parse_time_zone_offset_string(StringView offset_string);
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}
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