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LibJS: Replace magic nanosecond numbers with constants

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This is an editorial change in the Temporal spec.

See: 3fdbfda
This commit is contained in:
Linus Groh 2022-05-06 19:28:56 +02:00
parent 3729a910f6
commit c6f7214a60
9 changed files with 45 additions and 36 deletions
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12
Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTime.cpp
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@ -68,9 +68,9 @@ BigInt* get_epoch_from_iso_parts(GlobalObject& global_object, i32 year, u8 month
return js_bigint(vm, Crypto::SignedBigInteger::create_from(static_cast<i64>(ms)).multiplied_by(Crypto::UnsignedBigInteger { 1'000'000 }).plus(Crypto::SignedBigInteger::create_from((i64)microsecond * 1000)).plus(Crypto::SignedBigInteger(nanosecond)));
}
// -864 * 10^19 - 864 * 10^11
// nsMinInstant - nsPerDay
auto const DATETIME_NANOSECONDS_MIN = "-8640000086400000000000"_sbigint;
// +864 * 10^19 + 864 * 10^11
// nsMaxInstant + nsPerDay
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
@ -79,13 +79,13 @@ bool iso_date_time_within_limits(GlobalObject& global_object, i32 year, u8 month
// 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
// 2. If ns ≤ nsMinInstant - nsPerDay, then
if (ns <= DATETIME_NANOSECONDS_MIN) {
// a. Return false.
return false;
}
// 3. If ns ≥ 8.64 × 10^21 + 8.64 × 10^13, then
// 3. If ns ≥ nsMaxInstant + nsPerDay, then
if (ns >= DATETIME_NANOSECONDS_MAX) {
// a. Return false.
return false;
@ -328,9 +328,9 @@ ISODateTime round_iso_date_time(i32 year, u8 month, u8 day, u8 hour, u8 minute,
{
// 1. Assert: year, month, day, hour, minute, second, millisecond, microsecond, and nanosecond are integers.
// 2. If dayLength is not present, set dayLength to 8.64 × 10^13.
// 2. If dayLength is not present, set dayLength to nsPerDay.
if (!day_length.has_value())
day_length = 86400000000000;
day_length = ns_per_day;
// 3. Let roundedTime be ! RoundTime(hour, minute, second, millisecond, microsecond, nanosecond, increment, unit, roundingMode, dayLength).
auto rounded_time = round_time(hour, minute, second, millisecond, microsecond, nanosecond, increment, unit, rounding_mode, day_length);