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LibJS: Clarify mathematical types in Temporal AOs and functions
This is an editorial change in the Temporal spec.
See: e480d40
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3 changed files with 26 additions and 19 deletions
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@ -113,42 +113,44 @@ ThrowCompletionOr<TimeZone*> create_temporal_time_zone(GlobalObject& global_obje
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// 11.6.3 GetISOPartsFromEpoch ( epochNanoseconds ), https://tc39.es/proposal-temporal/#sec-temporal-getisopartsfromepoch
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ISODateTime get_iso_parts_from_epoch(BigInt const& epoch_nanoseconds)
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{
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// 1. Let remainderNs be remainder(epochNanoseconds, 10^6).
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// 1. Assert: epochNanoseconds is an integer.
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// 2. Let remainderNs be remainder(epochNanoseconds, 10^6).
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auto remainder_ns_bigint = epoch_nanoseconds.big_integer().divided_by(Crypto::UnsignedBigInteger { 1'000'000 }).remainder;
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auto remainder_ns = remainder_ns_bigint.to_base(10).to_int<i64>().value();
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// 2. Let epochMilliseconds be (epochNanoseconds − remainderNs) / 10^6.
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// 3. Let epochMilliseconds be (epochNanoseconds − remainderNs) / 10^6.
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auto epoch_milliseconds_bigint = epoch_nanoseconds.big_integer().minus(remainder_ns_bigint).divided_by(Crypto::UnsignedBigInteger { 1'000'000 }).quotient;
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auto epoch_milliseconds = (double)epoch_milliseconds_bigint.to_base(10).to_int<i64>().value();
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// 3. Let year be ! YearFromTime(epochMilliseconds).
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// 4. Let year be ! YearFromTime(epochMilliseconds).
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auto year = year_from_time(epoch_milliseconds);
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// 4. Let month be ! MonthFromTime(epochMilliseconds) + 1.
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// 5. Let month be ! MonthFromTime(epochMilliseconds) + 1.
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auto month = static_cast<u8>(month_from_time(epoch_milliseconds) + 1);
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// 5. Let day be ! DateFromTime(epochMilliseconds).
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// 6. Let day be ! DateFromTime(epochMilliseconds).
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auto day = date_from_time(epoch_milliseconds);
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// 6. Let hour be ! HourFromTime(epochMilliseconds).
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// 7. Let hour be ! HourFromTime(epochMilliseconds).
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auto hour = hour_from_time(epoch_milliseconds);
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// 7. Let minute be ! MinFromTime(epochMilliseconds).
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// 8. Let minute be ! MinFromTime(epochMilliseconds).
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auto minute = min_from_time(epoch_milliseconds);
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// 8. Let second be ! SecFromTime(epochMilliseconds).
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// 9. Let second be ! SecFromTime(epochMilliseconds).
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auto second = sec_from_time(epoch_milliseconds);
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// 9. Let millisecond be ! msFromTime(epochMilliseconds).
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// 10. Let millisecond be ! msFromTime(epochMilliseconds).
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auto millisecond = ms_from_time(epoch_milliseconds);
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// 10. Let microsecond be floor(remainderNs / 1000) modulo 1000.
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// 11. Let microsecond be floor(remainderNs / 1000) modulo 1000.
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auto microsecond = static_cast<u16>((remainder_ns / 1000) % 1000);
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// 11. Let nanosecond be remainderNs modulo 1000.
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// 12. Let nanosecond be remainderNs modulo 1000.
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auto nanosecond = static_cast<u16>(remainder_ns % 1000);
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// 12. Return the Record { [[Year]]: year, [[Month]]: month, [[Day]]: day, [[Hour]]: hour, [[Minute]]: minute, [[Second]]: second, [[Millisecond]]: millisecond, [[Microsecond]]: microsecond, [[Nanosecond]]: nanosecond }.
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// 13. Return the Record { [[Year]]: year, [[Month]]: month, [[Day]]: day, [[Hour]]: hour, [[Minute]]: minute, [[Second]]: second, [[Millisecond]]: millisecond, [[Microsecond]]: microsecond, [[Nanosecond]]: nanosecond }.
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return { .year = year, .month = month, .day = day, .hour = hour, .minute = minute, .second = second, .millisecond = millisecond, .microsecond = microsecond, .nanosecond = nanosecond };
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}
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@ -394,16 +396,18 @@ ThrowCompletionOr<String> builtin_time_zone_get_offset_string_for(GlobalObject&
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// 11.6.13 BuiltinTimeZoneGetPlainDateTimeFor ( timeZone, instant, calendar ), https://tc39.es/proposal-temporal/#sec-temporal-builtintimezonegetplaindatetimefor
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ThrowCompletionOr<PlainDateTime*> builtin_time_zone_get_plain_date_time_for(GlobalObject& global_object, Value time_zone, Instant& instant, Object& calendar)
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{
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// 1. Let offsetNanoseconds be ? GetOffsetNanosecondsFor(timeZone, instant).
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// 1. Assert: instant has an [[InitializedTemporalInstant]] internal slot.
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// 2. Let offsetNanoseconds be ? GetOffsetNanosecondsFor(timeZone, instant).
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auto offset_nanoseconds = TRY(get_offset_nanoseconds_for(global_object, time_zone, instant));
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// 2. Let result be ! GetISOPartsFromEpoch(instant.[[Nanoseconds]]).
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// 3. Let result be ! GetISOPartsFromEpoch(instant.[[Nanoseconds]]).
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auto result = get_iso_parts_from_epoch(instant.nanoseconds());
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// 3. Set result to ! BalanceISODateTime(result.[[Year]], result.[[Month]], result.[[Day]], result.[[Hour]], result.[[Minute]], result.[[Second]], result.[[Millisecond]], result.[[Microsecond]], result.[[Nanosecond]] + offsetNanoseconds).
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// 4. Set result to ! BalanceISODateTime(result.[[Year]], result.[[Month]], result.[[Day]], result.[[Hour]], result.[[Minute]], result.[[Second]], result.[[Millisecond]], result.[[Microsecond]], result.[[Nanosecond]] + offsetNanoseconds).
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result = balance_iso_date_time(result.year, result.month, result.day, result.hour, result.minute, result.second, result.millisecond, result.microsecond, result.nanosecond + offset_nanoseconds);
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// 4. Return ? CreateTemporalDateTime(result.[[Year]], result.[[Month]], result.[[Day]], result.[[Hour]], result.[[Minute]], result.[[Second]], result.[[Millisecond]], result.[[Microsecond]], result.[[Nanosecond]], calendar).
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// 5. Return ? CreateTemporalDateTime(result.[[Year]], result.[[Month]], result.[[Day]], result.[[Hour]], result.[[Minute]], result.[[Second]], result.[[Millisecond]], result.[[Microsecond]], result.[[Nanosecond]], calendar).
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return create_temporal_date_time(global_object, result.year, result.month, result.day, result.hour, result.minute, result.second, result.millisecond, result.microsecond, result.nanosecond, calendar);
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}
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