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LibJS: Fix numeric type confusion in GetEpochFromISOParts return value

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This is an editorial change in the Temporal spec.

See: 2a59eac
This commit is contained in:
Linus Groh 2022-04-29 19:10:21 +02:00
parent 70593b7448
commit 76a6bd0e75
5 changed files with 12 additions and 12 deletions
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6
Userland/Libraries/LibJS/Runtime/Temporal/Instant.cpp
View file

@ -118,7 +118,7 @@ ThrowCompletionOr<BigInt*> parse_temporal_instant(GlobalObject& global_object, S
// 5. Let utc be GetEpochFromISOParts(result.[[Year]], result.[[Month]], result.[[Day]], result.[[Hour]], result.[[Minute]], result.[[Second]], result.[[Millisecond]], result.[[Microsecond]], result.[[Nanosecond]]).
auto* utc = get_epoch_from_iso_parts(global_object, result.year, result.month, result.day, result.hour, result.minute, result.second, result.millisecond, result.microsecond, result.nanosecond);
// 6. If utc < −8.64 × 10^21 or utc > 8.64 × 10^21, then
// 6. If ℝ(utc) < −8.64 × 10^21 or ℝ(utc) > 8.64 × 10^21, then
if (utc->big_integer() < INSTANT_NANOSECONDS_MIN || utc->big_integer() > INSTANT_NANOSECONDS_MAX) {
// a. Throw a RangeError exception.
return vm.throw_completion<RangeError>(global_object, ErrorType::TemporalInvalidEpochNanoseconds);
@ -127,10 +127,10 @@ ThrowCompletionOr<BigInt*> parse_temporal_instant(GlobalObject& global_object, S
// 7. Let offsetNanoseconds be ? ParseTimeZoneOffsetString(offsetString).
auto offset_nanoseconds = TRY(parse_time_zone_offset_string(global_object, *offset_string));
// 8. Let result be utc − offsetNanoseconds.
// 8. Let result be utc − ℤ(offsetNanoseconds).
auto* result_ns = js_bigint(vm, utc->big_integer().minus(Crypto::SignedBigInteger::create_from(offset_nanoseconds)));
// 9. If ! IsValidEpochNanoseconds(ℤ(result)) is false, then
// 9. If ! IsValidEpochNanoseconds(result) is false, then
if (!is_valid_epoch_nanoseconds(*result_ns)) {
// a. Throw a RangeError exception.
return vm.throw_completion<RangeError>(global_object, ErrorType::TemporalInvalidEpochNanoseconds);

10
Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTime.cpp
View file

@ -64,7 +64,7 @@ BigInt* get_epoch_from_iso_parts(GlobalObject& global_object, i32 year, u8 month
// 5. Assert: ms is finite.
VERIFY(ms.is_finite_number());
// 6. Return ℝ(ms) × 10^6 + microsecond × 10^3 + nanosecond.
// 6. Return ℤ(ℝ(ms) × 10^6 + microsecond × 10^3 + nanosecond).
return js_bigint(vm, Crypto::SignedBigInteger::create_from(static_cast<i64>(ms.as_double())).multiplied_by(Crypto::UnsignedBigInteger { 1'000'000 }).plus(Crypto::SignedBigInteger::create_from((i64)microsecond * 1000)).plus(Crypto::SignedBigInteger(nanosecond)));
}
@ -76,17 +76,17 @@ auto const DATETIME_NANOSECONDS_MAX = "8640000086400000000000"_sbigint;
// 5.5.2 ISODateTimeWithinLimits ( year, month, day, hour, minute, second, millisecond, microsecond, nanosecond ), https://tc39.es/proposal-temporal/#sec-temporal-isodatetimewithinlimits
bool iso_date_time_within_limits(GlobalObject& global_object, i32 year, u8 month, u8 day, u8 hour, u8 minute, u8 second, u16 millisecond, u16 microsecond, u16 nanosecond)
{
// 1. Let ns be GetEpochFromISOParts(year, month, day, hour, minute, second, millisecond, microsecond, nanosecond).
auto ns = get_epoch_from_iso_parts(global_object, year, month, day, hour, minute, second, millisecond, microsecond, nanosecond);
// 1. Let ns be ℝ(GetEpochFromISOParts(year, month, day, hour, minute, second, millisecond, microsecond, nanosecond)).
auto ns = get_epoch_from_iso_parts(global_object, year, month, day, hour, minute, second, millisecond, microsecond, nanosecond)->big_integer();
// 2. If ns ≤ -8.64 × 10^21 - 8.64 × 10^13, then
if (ns->big_integer() <= DATETIME_NANOSECONDS_MIN) {
if (ns <= DATETIME_NANOSECONDS_MIN) {
// a. Return false.
return false;
}
// 3. If ns ≥ 8.64 × 10^21 + 8.64 × 10^13, then
if (ns->big_integer() >= DATETIME_NANOSECONDS_MAX) {
if (ns >= DATETIME_NANOSECONDS_MAX) {
// a. Return false.
return false;
}

4
Userland/Libraries/LibJS/Runtime/Temporal/TimeZone.cpp
View file

@ -586,10 +586,10 @@ 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 × 10^13).
// 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))));
// 9. Let dayAfter be ! CreateTemporalInstant(epochNanoseconds + 8.64 × 10^13).
// 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))));
// 10. Let offsetBefore be ? GetOffsetNanosecondsFor(timeZone, dayBefore).

2
Userland/Libraries/LibJS/Runtime/Temporal/TimeZonePrototype.cpp
View file

@ -140,7 +140,7 @@ JS_DEFINE_NATIVE_FUNCTION(TimeZonePrototype::get_possible_instants_for)
// a. 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());
// b. Let instant be ! CreateTemporalInstant(ℤ(epochNanoseconds − timeZone.[[OffsetNanoseconds]])).
// b. Let instant be ! CreateTemporalInstant(epochNanoseconds − ℤ(timeZone.[[OffsetNanoseconds]])).
auto* instant = MUST(create_temporal_instant(global_object, *js_bigint(vm, epoch_nanoseconds->big_integer().minus(Crypto::SignedBigInteger::create_from(*time_zone->offset_nanoseconds())))));
// c. Return CreateArrayFromList(« instant »).

2
Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp
View file

@ -61,7 +61,7 @@ ThrowCompletionOr<BigInt const*> interpret_iso_date_time_offset(GlobalObject& gl
// a. Let epochNanoseconds be GetEpochFromISOParts(year, month, day, hour, minute, second, millisecond, microsecond, nanosecond).
auto* epoch_nanoseconds = get_epoch_from_iso_parts(global_object, year, month, day, hour, minute, second, millisecond, microsecond, nanosecond);
// b. Return epochNanoseconds − offsetNanoseconds.
// b. Return epochNanoseconds − ℤ(offsetNanoseconds).
auto offset_nanoseconds_bigint = Crypto::SignedBigInteger::create_from((i64)offset_nanoseconds);
return js_bigint(vm, epoch_nanoseconds->big_integer().minus(offset_nanoseconds_bigint));
}