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LibJS: Implement Temporal.Instant.fromEpochMilliseconds()

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This commit is contained in:
Linus Groh 2021-07-09 12:00:31 +01:00
parent 2401e45720
commit 66ff772254
4 changed files with 81 additions and 0 deletions
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27
Userland/Libraries/LibJS/Runtime/Temporal/InstantConstructor.cpp
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@ -28,6 +28,7 @@ void InstantConstructor::initialize(GlobalObject& global_object)
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(vm.names.fromEpochSeconds, from_epoch_seconds, 1, attr);
define_native_function(vm.names.fromEpochMilliseconds, from_epoch_milliseconds, 1, attr);
define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
}
@ -90,4 +91,30 @@ JS_DEFINE_NATIVE_FUNCTION(InstantConstructor::from_epoch_seconds)
return create_temporal_instant(global_object, *epoch_nanoseconds);
}
// 8.2.4 Temporal.Instant.fromEpochMilliseconds ( epochMilliseconds ), https://tc39.es/proposal-temporal/#sec-temporal.instant.fromepochmilliseconds
JS_DEFINE_NATIVE_FUNCTION(InstantConstructor::from_epoch_milliseconds)
{
// 1. Set epochMilliseconds to ? ToNumber(epochMilliseconds).
auto epoch_milliseconds_value = vm.argument(0).to_number(global_object);
if (vm.exception())
return {};
// 2. Set epochMilliseconds to ? NumberToBigInt(epochMilliseconds).
auto* epoch_milliseconds = number_to_bigint(global_object, epoch_milliseconds_value);
if (vm.exception())
return {};
// 3. Let epochNanoseconds be epochMilliseconds × 10^6ℤ.
auto* epoch_nanoseconds = js_bigint(vm.heap(), epoch_milliseconds->big_integer().multiplied_by(Crypto::UnsignedBigInteger { 1'000'000 }));
// 4. If ! IsValidEpochNanoseconds(epochNanoseconds) is false, throw a RangeError exception.
if (!is_valid_epoch_nanoseconds(*epoch_nanoseconds)) {
vm.throw_exception<RangeError>(global_object, ErrorType::TemporalInvalidEpochNanoseconds);
return {};
}
// 5. Return ? CreateTemporalInstant(epochNanoseconds).
return create_temporal_instant(global_object, *epoch_nanoseconds);
}
}