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LibJS: Implement Temporal.Instant.prototype.add()

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This commit is contained in:
Linus Groh 2021-08-07 00:31:08 +01:00
parent 8ffad70504
commit b38f1fb071
8 changed files with 173 additions and 3 deletions
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29
Userland/Libraries/LibJS/Runtime/Temporal/Instant.cpp
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@ -160,6 +160,35 @@ i32 compare_epoch_nanoseconds(BigInt const& epoch_nanoseconds_one, BigInt const&
return 0;
}
// 8.5.6 AddInstant ( epochNanoseconds, hours, minutes, seconds, milliseconds, microseconds, nanoseconds ), https://tc39.es/proposal-temporal/#sec-temporal-addinstant
BigInt* add_instant(GlobalObject& global_object, BigInt const& epoch_nanoseconds, double hours, double minutes, double seconds, double milliseconds, double microseconds, double nanoseconds)
{
auto& vm = global_object.vm();
// 1. Assert: hours, minutes, seconds, milliseconds, microseconds, and nanoseconds are integer Number values.
VERIFY(hours == trunc(hours) && minutes == trunc(minutes) && seconds == trunc(seconds) && milliseconds == trunc(milliseconds) && microseconds == trunc(microseconds) && nanoseconds == trunc(nanoseconds));
// 2. Let result be epochNanoseconds + ℤ(nanoseconds) + ℤ(microseconds) × 1000ℤ + ℤ(milliseconds) × 10^6ℤ + ℤ(seconds) × 10^9ℤ + ℤ(minutes) × 60ℤ × 10^9ℤ + ℤ(hours) × 3600ℤ × 10^9ℤ.
// FIXME: Pretty sure i64's are not sufficient for the extreme cases.
auto* result = js_bigint(vm,
epoch_nanoseconds.big_integer()
.plus(Crypto::SignedBigInteger::create_from((i64)nanoseconds))
.plus(Crypto::SignedBigInteger::create_from((i64)microseconds).multiplied_by(Crypto::SignedBigInteger { 1'000 }))
.plus(Crypto::SignedBigInteger::create_from((i64)milliseconds).multiplied_by(Crypto::SignedBigInteger { 1'000'000 }))
.plus(Crypto::SignedBigInteger::create_from((i64)seconds).multiplied_by(Crypto::SignedBigInteger { 1'000'000'000 }))
.plus(Crypto::SignedBigInteger::create_from((i64)minutes).multiplied_by(Crypto::SignedBigInteger { 60 }).multiplied_by(Crypto::SignedBigInteger { 1'000'000'000 }))
.plus(Crypto::SignedBigInteger::create_from((i64)hours).multiplied_by(Crypto::SignedBigInteger { 3600 }).multiplied_by(Crypto::SignedBigInteger { 1'000'000'000 })));
// If ! IsValidEpochNanoseconds(result) is false, throw a RangeError exception.
if (!is_valid_epoch_nanoseconds(*result)) {
vm.throw_exception<RangeError>(global_object, ErrorType::TemporalInvalidEpochNanoseconds);
return {};
}
// 4. Return result.
return result;
}
// 8.5.8 RoundTemporalInstant ( ns, increment, unit, roundingMode ), https://tc39.es/proposal-temporal/#sec-temporal-roundtemporalinstant
BigInt* round_temporal_instant(GlobalObject& global_object, BigInt const& nanoseconds, u64 increment, String const& unit, String const& rounding_mode)
{