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LibJS: Implement time zone identifier AOs centrally within Date

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This is an editorial change in the ECMA-262 spec. See:
73926a5

The idea here is to reduce duplication of these AOs between ECMA-262,
ECMA-402, and Temporal. This patch contains only the ECMA-262 changes.
This commit is contained in:
Timothy Flynn 2023-10-03 12:14:59 -04:00 • committed by Andreas Kling
parent 0bc401a1d6
commit f31540e419
5 changed files with 88 additions and 33 deletions
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9
Userland/Libraries/LibJS/Runtime/Date.h
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@ -31,6 +31,12 @@ private:
double m_date_value { 0 }; // [[DateValue]]
};
// 21.4.1.22 Time Zone Identifier Record, https://tc39.es/ecma262/#sec-time-zone-identifier-record
struct TimeZoneIdentifier {
StringView identifier; // [[Identifier]]
StringView primary_identifier; // [[PrimaryIdentifier]]
};
// https://tc39.es/ecma262/#eqn-HoursPerDay
constexpr inline double hours_per_day = 24;
// https://tc39.es/ecma262/#eqn-MinutesPerHour
@ -67,7 +73,8 @@ u16 ms_from_time(double);
Crypto::SignedBigInteger get_utc_epoch_nanoseconds(i32 year, u8 month, u8 day, u8 hour, u8 minute, u8 second, u16 millisecond, u16 microsecond, u16 nanosecond);
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);
i64 get_named_time_zone_offset_nanoseconds(StringView time_zone_identifier, Crypto::SignedBigInteger const& epoch_nanoseconds);
StringView default_time_zone();
Vector<TimeZoneIdentifier> available_named_time_zone_identifiers();
StringView system_time_zone_identifier();
double local_time(double time);
double utc_time(double time);
double make_time(double hour, double min, double sec, double ms);