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LibJS: Replace magic nanosecond numbers with constants

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This is an editorial change in the Temporal spec.

See: https://github.com/tc39/proposal-temporal/commit/3fdbfda
This commit is contained in:
Linus Groh
2022-05-06 19:28:56 +02:00
parent 3729a910f6
commit c6f7214a60
Notes: sideshowbarker 2024-07-17 11:10:29 +09:00 
Author: https://github.com/linusg
Commit: https://github.com/SerenityOS/serenity/commit/c6f7214a60
Pull-request: https://github.com/SerenityOS/serenity/pull/13944
Reviewed-by: https://github.com/IdanHo
9 changed files with 45 additions and 36 deletions
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12
Userland/Libraries/LibJS/Runtime/Temporal/TimeZone.cpp
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@@ -491,8 +491,8 @@ ThrowCompletionOr<double> get_offset_nanoseconds_for(GlobalObject& global_object
// 5. Set offsetNanoseconds to ℝ(offsetNanoseconds).
auto offset_nanoseconds = offset_nanoseconds_value.as_double();
// 6. If abs(offsetNanoseconds) > 86400 × 10^9, throw a RangeError exception.
if (fabs(offset_nanoseconds) > 86400000000000.0)
// 6. If abs(offsetNanoseconds) > nsPerDay, throw a RangeError exception.
if (fabs(offset_nanoseconds) > ns_per_day)
return vm.throw_completion<RangeError>(global_object, ErrorType::TemporalInvalidOffsetNanosecondsValue);
// 7. Return offsetNanoseconds.
@@ -588,11 +588,11 @@ ThrowCompletionOr<Instant*> disambiguate_possible_instants(GlobalObject& global_
// 7. Let epochNanoseconds be GetEpochFromISOParts(dateTime.[[ISOYear]], dateTime.[[ISOMonth]], dateTime.[[ISODay]], dateTime.[[ISOHour]], dateTime.[[ISOMinute]], dateTime.[[ISOSecond]], dateTime.[[ISOMillisecond]], dateTime.[[ISOMicrosecond]], dateTime.[[ISONanosecond]]).
auto* epoch_nanoseconds = get_epoch_from_iso_parts(global_object, date_time.iso_year(), date_time.iso_month(), date_time.iso_day(), date_time.iso_hour(), date_time.iso_minute(), date_time.iso_second(), date_time.iso_millisecond(), date_time.iso_microsecond(), date_time.iso_nanosecond());
// 8. Let dayBefore be ! CreateTemporalInstant(epochNanoseconds - 8.64 × 10^13ℤ).
auto* day_before = MUST(create_temporal_instant(global_object, *js_bigint(vm, epoch_nanoseconds->big_integer().minus("86400000000000"_sbigint))));
// 8. Let dayBefore be ! CreateTemporalInstant(epochNanoseconds - ℤ(nsPerDay)).
auto* day_before = MUST(create_temporal_instant(global_object, *js_bigint(vm, epoch_nanoseconds->big_integer().minus(ns_per_day_bigint))));
// 9. Let dayAfter be ! CreateTemporalInstant(epochNanoseconds + 8.64 × 10^13ℤ).
auto* day_after = MUST(create_temporal_instant(global_object, *js_bigint(vm, epoch_nanoseconds->big_integer().plus("86400000000000"_sbigint))));
// 9. Let dayAfter be ! CreateTemporalInstant(epochNanoseconds + ℤ(nsPerDay)).
auto* day_after = MUST(create_temporal_instant(global_object, *js_bigint(vm, epoch_nanoseconds->big_integer().plus(ns_per_day_bigint))));
// 10. Let offsetBefore be ? GetOffsetNanosecondsFor(timeZone, dayBefore).
auto offset_before = TRY(get_offset_nanoseconds_for(global_object, time_zone, *day_before));