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LibJS: Implement the LocalTime, UTC, and TimeWithinDay AOs
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@ -337,6 +337,20 @@ double local_tza(double time, bool is_utc, Optional<StringView> time_zone_overri
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return is_utc ? offset : -offset;
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}
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// 21.4.1.8 LocalTime ( t ), https://tc39.es/ecma262/#sec-localtime
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double local_time(double time)
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{
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// 1. Return t + LocalTZA(t, true).
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return time + local_tza(time, true);
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}
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// 21.4.1.9 UTC ( t ), https://tc39.es/ecma262/#sec-utc-t
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double utc_time(double time)
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{
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// 1. Return t - LocalTZA(t, false).
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return time - local_tza(time, false);
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}
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// 21.4.1.11 MakeTime ( hour, min, sec, ms ), https://tc39.es/ecma262/#sec-maketime
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Value make_time(GlobalObject& global_object, Value hour, Value min, Value sec, Value ms)
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{
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@ -365,6 +379,13 @@ double day(double time_value)
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return floor(time_value / MS_PER_DAY);
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}
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// TimeWithinDay(t), https://tc39.es/ecma262/#eqn-TimeWithinDay
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double time_within_day(double time)
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{
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// 𝔽(ℝ(t) modulo ℝ(msPerDay))
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return modulo(time, MS_PER_DAY);
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}
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// 21.4.1.12 MakeDay ( year, month, date ), https://tc39.es/ecma262/#sec-makeday
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Value make_day(GlobalObject& global_object, Value year, Value month, Value date)
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{
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@ -105,7 +105,10 @@ u8 sec_from_time(double);
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u16 ms_from_time(double);
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u8 week_day(double);
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double local_tza(double time, bool is_utc, Optional<StringView> time_zone_override = {});
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double local_time(double time);
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double utc_time(double time);
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double day(double);
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double time_within_day(double);
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Value make_time(GlobalObject& global_object, Value hour, Value min, Value sec, Value ms);
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Value make_day(GlobalObject& global_object, Value year, Value month, Value date);
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Value make_date(Value day, Value time);
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