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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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+
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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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+
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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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+
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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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