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LibJS: Require that NanosecondsToDays doesn't flip sign

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This is an normative change in the Temporal spec.
See: e13c52d
This commit is contained in:
Moustafa Raafat 2022-10-21 22:36:35 +01:00 • committed by Linus Groh
parent cfd684dc2f
commit b1c8029c2b
2 changed files with 21 additions and 1 deletions
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4
Userland/Libraries/LibJS/Runtime/ErrorTypes.h
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@ -269,6 +269,10 @@
M(TemporalMissingOptionsObject, "Required options object is missing or undefined") \
M(TemporalMissingStartingPoint, "A starting point is required for balancing {}") \
M(TemporalMissingUnits, "One or both of smallestUnit or largestUnit is required") \
M(TemporalNanosecondsConvertedToDaysWithOppositeSign, "Time zone or calendar converted nanoseconds into a number of days with " \
"the opposite sign") \
M(TemporalNanosecondsConvertedToRemainderOfNanosecondsWithOppositeSign, "Time zone or calendar ended up with a remainder of " \
"nanoseconds with the opposite sign") \
M(TemporalObjectMustHaveOneOf, "Object must have at least one of the following properties: {}") \
M(TemporalObjectMustNotHave, "Object must not have a defined {} property") \
M(TemporalPropertyMustBeFinite, "Property must not be Infinity") \

18
Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp
View file

@ -538,7 +538,23 @@ ThrowCompletionOr<NanosecondsToDaysResult> nanoseconds_to_days(VM& vm, Crypto::S
}
}
// 19. Return the Record { [[Days]]: days, [[Nanoseconds]]: nanoseconds, [[DayLength]]: abs(dayLengthNs) }.
// 19. If days < 0 and sign = 1, throw a RangeError exception.
if (days < 0 && sign == 1)
return vm.throw_completion<RangeError>(ErrorType::TemporalNanosecondsConvertedToDaysWithOppositeSign);
// 20. If days > 0 and sign = -1, throw a RangeError exception.
if (days > 0 && sign == -1)
return vm.throw_completion<RangeError>(ErrorType::TemporalNanosecondsConvertedToDaysWithOppositeSign);
// 21. If nanoseconds < 0 and sign = 1, throw a RangeError exception.
if (nanoseconds.is_negative() && sign == 1)
return vm.throw_completion<RangeError>(ErrorType::TemporalNanosecondsConvertedToRemainderOfNanosecondsWithOppositeSign);
// 22. If nanoseconds > 0 and sign = -1, throw a RangeError exception.
if (nanoseconds.is_positive() && sign == -1)
return vm.throw_completion<RangeError>(ErrorType::TemporalNanosecondsConvertedToRemainderOfNanosecondsWithOppositeSign);
// 23. Return the Record { [[Days]]: days, [[Nanoseconds]]: nanoseconds, [[DayLength]]: abs(dayLengthNs) }.
return NanosecondsToDaysResult { .days = days, .nanoseconds = move(nanoseconds), .day_length = fabs(day_length_ns.to_double()) };
}