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LibJS: Implement stringification Temporal.Instant prototypes

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Timothy Flynn 2024-11-24 15:46:43 -05:00 • committed by Andreas Kling
commit 615ad70030
Notes: github-actions[bot] 2024-11-25 12:34:21 +00:00
11 changed files with 387 additions and 4 deletions
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41
Libraries/LibJS/Runtime/Temporal/AbstractOperations.cpp
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@ -804,7 +804,7 @@ double apply_unsigned_rounding_mode(double x, double r1, double r2, UnsignedRoun
}
// 13.27 ApplyUnsignedRoundingMode ( x, r1, r2, unsignedRoundingMode ), https://tc39.es/proposal-temporal/#sec-applyunsignedroundingmode
Crypto::SignedBigInteger apply_unsigned_rounding_mode(Crypto::SignedDivisionResult const& x, Crypto::SignedBigInteger const& r1, Crypto::SignedBigInteger const& r2, UnsignedRoundingMode unsigned_rounding_mode, Crypto::UnsignedBigInteger const& increment)
Crypto::SignedBigInteger apply_unsigned_rounding_mode(Crypto::SignedDivisionResult const& x, Crypto::SignedBigInteger r1, Crypto::SignedBigInteger r2, UnsignedRoundingMode unsigned_rounding_mode, Crypto::UnsignedBigInteger const& increment)
{
// 1. If x = r1, return r1.
if (x.quotient == r1 && x.remainder.unsigned_value().is_zero())
@ -947,7 +947,7 @@ Crypto::SignedBigInteger round_number_to_increment(Crypto::SignedBigInteger cons
auto r2 = division_result.quotient.plus(1_bigint);
// 7. Let rounded be ApplyUnsignedRoundingMode(quotient, r1, r2, unsignedRoundingMode).
auto rounded = apply_unsigned_rounding_mode(division_result, r1, r2, unsigned_rounding_mode, increment);
auto rounded = apply_unsigned_rounding_mode(division_result, move(r1), move(r2), unsigned_rounding_mode, increment);
// 8. If isNegative is NEGATIVE, set rounded to -rounded.
if (is_negative == Sign::Negative)
@ -957,6 +957,43 @@ Crypto::SignedBigInteger round_number_to_increment(Crypto::SignedBigInteger cons
return rounded.multiplied_by(increment);
}
// 13.29 RoundNumberToIncrementAsIfPositive ( x, increment, roundingMode ), https://tc39.es/proposal-temporal/#sec-temporal-roundnumbertoincrementasifpositive
Crypto::SignedBigInteger round_number_to_increment_as_if_positive(Crypto::SignedBigInteger const& x, Crypto::UnsignedBigInteger const& increment, RoundingMode rounding_mode)
{
// OPTIMIZATION: If the increment is 1 the number is always rounded.
if (increment == 1)
return x;
// 1. Let quotient be x / increment.
auto division_result = x.divided_by(increment);
// OPTIMIZATION: If there's no remainder the number is already rounded.
if (division_result.remainder.unsigned_value().is_zero())
return x;
// 2. Let unsignedRoundingMode be GetUnsignedRoundingMode(roundingMode, POSITIVE).
auto unsigned_rounding_mode = get_unsigned_rounding_mode(rounding_mode, Sign::Positive);
// 3. Let r1 be the largest integer such that r1 ≤ quotient.
// 4. Let r2 be the smallest integer such that r2 > quotient.
Crypto::SignedBigInteger r1;
Crypto::SignedBigInteger r2;
if (x.is_negative()) {
r1 = division_result.quotient.minus("1"_sbigint);
r2 = division_result.quotient;
} else {
r1 = division_result.quotient;
r2 = division_result.quotient.plus("1"_sbigint);
}
// 5. Let rounded be ApplyUnsignedRoundingMode(quotient, r1, r2, unsignedRoundingMode).
auto rounded = apply_unsigned_rounding_mode(division_result, move(r1), move(r2), unsigned_rounding_mode, increment);
// 6. Return rounded × increment.
return rounded.multiplied_by(increment);
}
// 13.33 ParseISODateTime ( isoString, allowedFormats ), https://tc39.es/proposal-temporal/#sec-temporal-parseisodatetime
ThrowCompletionOr<ParsedISODateTime> parse_iso_date_time(VM& vm, StringView iso_string, ReadonlySpan<Production> allowed_formats)
{