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LibJS: Check for invalid epoch nanoseconds in InterpretISODateTimeOffset

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This is a normative change in the Temporal spec.

See: cdfe4a5
This commit is contained in:
Linus Groh 2022-06-23 19:49:11 +01:00
parent d10e0f0e3e
commit ddea6d451b
1 changed files with 10 additions and 2 deletions
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12
Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp
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@ -62,9 +62,17 @@ 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 - ℤ(offsetNanoseconds).
// b. Set epochNanoseconds to epochNanoseconds - ℤ(offsetNanoseconds).
// FIXME: Narrowing conversion from 'double' to 'i64'
auto offset_nanoseconds_bigint = Crypto::SignedBigInteger::create_from((i64)offset_nanoseconds);
return js_bigint(vm, epoch_nanoseconds->big_integer().minus(offset_nanoseconds_bigint));
epoch_nanoseconds = js_bigint(vm, epoch_nanoseconds->big_integer().minus(offset_nanoseconds_bigint));
// c. If ! IsValidEpochNanoseconds(epochNanoseconds) is false, throw a RangeError exception.
if (!is_valid_epoch_nanoseconds(*epoch_nanoseconds))
return vm.throw_completion<RangeError>(global_object, ErrorType::TemporalInvalidEpochNanoseconds);
// d. Return epochNanoseconds.
return epoch_nanoseconds;
}
// 5. Assert: offsetBehaviour is option.