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/*
* Copyright (C) 2021 Sony Interactive Entertainment Inc.
* Copyright (C) 2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "TemporalDuration.h"
#include "IntlObjectInlines.h"
#include "JSCInlines.h"
#include "TemporalObject.h"
#include <wtf/text/StringBuilder.h>
#include <wtf/text/StringConcatenate.h>
namespace JSC {
static constexpr double nanosecondsPerDay = 24.0 * 60 * 60 * 1000 * 1000 * 1000;
const ClassInfo TemporalDuration::s_info = { "Object", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(TemporalDuration) };
TemporalDuration* TemporalDuration::create(VM& vm, Structure* structure, ISO8601::Duration&& duration)
{
auto* object = new (NotNull, allocateCell<TemporalDuration>(vm)) TemporalDuration(vm, structure, WTFMove(duration));
object->finishCreation(vm);
return object;
}
Structure* TemporalDuration::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
}
TemporalDuration::TemporalDuration(VM& vm, Structure* structure, ISO8601::Duration&& duration)
: Base(vm, structure)
, m_duration(WTFMove(duration))
{
}
void TemporalDuration::finishCreation(VM& vm)
{
Base::finishCreation(vm);
ASSERT(inherits(vm, info()));
}
// CreateTemporalDuration ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds [ , newTarget ] )
// https://tc39.es/proposal-temporal/#sec-temporal-createtemporalduration
TemporalDuration* TemporalDuration::tryCreateIfValid(JSGlobalObject* globalObject, ISO8601::Duration&& duration, Structure* structure)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (!ISO8601::isValidDuration(duration)) {
throwRangeError(globalObject, scope, "Temporal.Duration properties must be finite and of consistent sign"_s);
return { };
}
return TemporalDuration::create(vm, structure ? structure : globalObject->durationStructure(), WTFMove(duration));
}
// ToTemporalDurationRecord ( temporalDurationLike )
// https://tc39.es/proposal-temporal/#sec-temporal-totemporaldurationrecord
ISO8601::Duration TemporalDuration::fromDurationLike(JSGlobalObject* globalObject, JSObject* durationLike)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (durationLike->inherits<TemporalDuration>(vm))
return jsCast<TemporalDuration*>(durationLike)->m_duration;
ISO8601::Duration result;
auto hasRelevantProperty = false;
for (TemporalUnit unit : temporalUnitsInTableOrder) {
JSValue value = durationLike->get(globalObject, temporalUnitPluralPropertyName(vm, unit));
RETURN_IF_EXCEPTION(scope, { });
if (value.isUndefined()) {
result[unit] = 0;
continue;
}
hasRelevantProperty = true;
result[unit] = value.toNumber(globalObject);
RETURN_IF_EXCEPTION(scope, { });
if (!isInteger(result[unit])) {
throwRangeError(globalObject, scope, "Temporal.Duration properties must be integers"_s);
return { };
}
}
if (!hasRelevantProperty) {
throwTypeError(globalObject, scope, "Object must contain at least one Temporal.Duration property"_s);
return { };
}
return result;
}
// ToLimitedTemporalDuration ( temporalDurationLike, disallowedFields )
// https://tc39.es/proposal-temporal/#sec-temporal-tolimitedtemporalduration
ISO8601::Duration TemporalDuration::toISO8601Duration(JSGlobalObject* globalObject, JSValue itemValue)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
ISO8601::Duration duration;
if (itemValue.isObject()) {
duration = fromDurationLike(globalObject, asObject(itemValue));
RETURN_IF_EXCEPTION(scope, { });
} else {
String string = itemValue.toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, { });
auto parsedDuration = ISO8601::parseDuration(string);
if (!parsedDuration) {
// 3090: 308 digits * 10 fields + 10 designators
throwRangeError(globalObject, scope, makeString("'"_s, ellipsizeAt(3090, string), "' is not a valid Duration string"_s));
return { };
}
duration = parsedDuration.value();
}
if (!ISO8601::isValidDuration(duration)) {
throwRangeError(globalObject, scope, "Temporal.Duration properties must be finite and of consistent sign"_s);
return { };
}
return duration;
}
// ToTemporalDuration ( item )
// https://tc39.es/proposal-temporal/#sec-temporal-totemporalduration
TemporalDuration* TemporalDuration::toTemporalDuration(JSGlobalObject* globalObject, JSValue itemValue)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (itemValue.inherits<TemporalDuration>(vm))
return jsCast<TemporalDuration*>(itemValue);
auto result = toISO8601Duration(globalObject, itemValue);
RETURN_IF_EXCEPTION(scope, nullptr);
return TemporalDuration::create(vm, globalObject->durationStructure(), WTFMove(result));
}
// ToLimitedTemporalDuration ( temporalDurationLike, disallowedFields )
// https://tc39.es/proposal-temporal/#sec-temporal-tolimitedtemporalduration
ISO8601::Duration TemporalDuration::toLimitedDuration(JSGlobalObject* globalObject, JSValue itemValue, std::initializer_list<TemporalUnit> disallowedUnits)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
ISO8601::Duration duration = toISO8601Duration(globalObject, itemValue);
RETURN_IF_EXCEPTION(scope, { });
if (!isValidDuration(duration)) {
throwRangeError(globalObject, scope, "Temporal.Duration properties must be finite and of consistent sign"_s);
return { };
}
for (TemporalUnit unit : disallowedUnits) {
if (duration[unit]) {
throwRangeError(globalObject, scope, makeString("Adding "_s, temporalUnitPluralPropertyName(vm, unit).publicName(), " not supported by Temporal.Instant. Try Temporal.ZonedDateTime instead"_s));
return { };
}
}
return duration;
}
TemporalDuration* TemporalDuration::from(JSGlobalObject* globalObject, JSValue itemValue)
{
VM& vm = globalObject->vm();
if (itemValue.inherits<TemporalDuration>(vm)) {
ISO8601::Duration cloned = jsCast<TemporalDuration*>(itemValue)->m_duration;
return TemporalDuration::create(vm, globalObject->durationStructure(), WTFMove(cloned));
}
return toTemporalDuration(globalObject, itemValue);
}
// TotalDurationNanoseconds ( days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds, offsetShift )
// https://tc39.es/proposal-temporal/#sec-temporal-totaldurationnanoseconds
static double totalNanoseconds(ISO8601::Duration& duration)
{
auto hours = 24 * duration.days() + duration.hours();
auto minutes = 60 * hours + duration.minutes();
auto seconds = 60 * minutes + duration.seconds();
auto milliseconds = 1000 * seconds + duration.milliseconds();
auto microseconds = 1000 * milliseconds + duration.microseconds();
return 1000 * microseconds + duration.nanoseconds();
}
JSValue TemporalDuration::compare(JSGlobalObject* globalObject, JSValue valueOne, JSValue valueTwo)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto* one = toTemporalDuration(globalObject, valueOne);
RETURN_IF_EXCEPTION(scope, { });
auto* two = toTemporalDuration(globalObject, valueTwo);
RETURN_IF_EXCEPTION(scope, { });
// FIXME: Implement relativeTo parameter after PlainDateTime / ZonedDateTime.
if (one->years() || two->years() || one->months() || two->months() || one->weeks() || two->weeks()) {
throwRangeError(globalObject, scope, "Cannot compare a duration of years, months, or weeks without a relativeTo option"_s);
return { };
}
auto nsOne = totalNanoseconds(one->m_duration);
auto nsTwo = totalNanoseconds(two->m_duration);
return jsNumber(nsOne > nsTwo ? 1 : nsOne < nsTwo ? -1 : 0);
}
int TemporalDuration::sign(const ISO8601::Duration& duration)
{
for (auto value : duration) {
if (value < 0)
return -1;
if (value > 0)
return 1;
}
return 0;
}
ISO8601::Duration TemporalDuration::with(JSGlobalObject* globalObject, JSObject* durationLike) const
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
ISO8601::Duration result;
auto hasRelevantProperty = false;
for (TemporalUnit unit : temporalUnitsInTableOrder) {
JSValue value = durationLike->get(globalObject, temporalUnitPluralPropertyName(vm, unit));
RETURN_IF_EXCEPTION(scope, { });
if (value.isUndefined()) {
result[unit] = m_duration[unit];
continue;
}
hasRelevantProperty = true;
result[unit] = value.toNumber(globalObject);
RETURN_IF_EXCEPTION(scope, { });
if (!isInteger(result[unit])) {
throwRangeError(globalObject, scope, "Temporal.Duration properties must be integers"_s);
return { };
}
}
if (!hasRelevantProperty) {
throwTypeError(globalObject, scope, "Object must contain at least one Temporal.Duration property"_s);
return { };
}
return result;
}
ISO8601::Duration TemporalDuration::negated() const
{
return -m_duration;
}
ISO8601::Duration TemporalDuration::abs() const
{
ISO8601::Duration result;
for (size_t i = 0; i < numberOfTemporalUnits; i++)
result[i] = std::abs(m_duration[i]);
return result;
}
// DefaultTemporalLargestUnit ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds )
// https://tc39.es/proposal-temporal/#sec-temporal-defaulttemporallargestunit
static TemporalUnit largestSubduration(const ISO8601::Duration& duration)
{
uint8_t index = 0;
while (index < numberOfTemporalUnits - 1 && !duration[index])
index++;
return static_cast<TemporalUnit>(index);
}
// BalanceDuration ( days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds, largestUnit [ , relativeTo ] )
// https://tc39.es/proposal-temporal/#sec-temporal-balanceduration
void TemporalDuration::balance(ISO8601::Duration& duration, TemporalUnit largestUnit)
{
auto nanoseconds = totalNanoseconds(duration);
duration.clear();
if (largestUnit <= TemporalUnit::Day) {
duration.setDays(std::trunc(nanoseconds / nanosecondsPerDay));
nanoseconds = std::fmod(nanoseconds, nanosecondsPerDay);
}
double microseconds = std::trunc(nanoseconds / 1000);
double milliseconds = std::trunc(microseconds / 1000);
double seconds = std::trunc(milliseconds / 1000);
double minutes = std::trunc(seconds / 60);
if (largestUnit <= TemporalUnit::Hour) {
duration.setNanoseconds(std::fmod(nanoseconds, 1000));
duration.setMicroseconds(std::fmod(microseconds, 1000));
duration.setMilliseconds(std::fmod(milliseconds, 1000));
duration.setSeconds(std::fmod(seconds, 60));
duration.setMinutes(std::fmod(minutes, 60));
duration.setHours(std::trunc(minutes / 60));
} else if (largestUnit == TemporalUnit::Minute) {
duration.setNanoseconds(std::fmod(nanoseconds, 1000));
duration.setMicroseconds(std::fmod(microseconds, 1000));
duration.setMilliseconds(std::fmod(milliseconds, 1000));
duration.setSeconds(std::fmod(seconds, 60));
duration.setMinutes(minutes);
} else if (largestUnit == TemporalUnit::Second) {
duration.setNanoseconds(std::fmod(nanoseconds, 1000));
duration.setMicroseconds(std::fmod(microseconds, 1000));
duration.setMilliseconds(std::fmod(milliseconds, 1000));
duration.setSeconds(seconds);
} else if (largestUnit == TemporalUnit::Millisecond) {
duration.setNanoseconds(std::fmod(nanoseconds, 1000));
duration.setMicroseconds(std::fmod(microseconds, 1000));
duration.setMilliseconds(milliseconds);
} else if (largestUnit == TemporalUnit::Microsecond) {
duration.setNanoseconds(std::fmod(nanoseconds, 1000));
duration.setMicroseconds(microseconds);
} else
duration.setNanoseconds(nanoseconds);
}
ISO8601::Duration TemporalDuration::add(JSGlobalObject* globalObject, JSValue otherValue) const
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto other = toISO8601Duration(globalObject, otherValue);
RETURN_IF_EXCEPTION(scope, { });
// FIXME: Implement relativeTo parameter after PlainDateTime / ZonedDateTime.
auto largestUnit = std::min(largestSubduration(m_duration), largestSubduration(other));
if (largestUnit <= TemporalUnit::Week) {
throwRangeError(globalObject, scope, "Cannot add a duration of years, months, or weeks without a relativeTo option"_s);
return { };
}
ISO8601::Duration result {
0, 0, 0, days() + other.days(),
hours() + other.hours(), minutes() + other.minutes(), seconds() + other.seconds(),
milliseconds() + other.milliseconds(), microseconds() + other.microseconds(), nanoseconds() + other.nanoseconds()
};
balance(result, largestUnit);
return result;
}
ISO8601::Duration TemporalDuration::subtract(JSGlobalObject* globalObject, JSValue otherValue) const
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto other = toISO8601Duration(globalObject, otherValue);
RETURN_IF_EXCEPTION(scope, { });
// FIXME: Implement relativeTo parameter after PlainDateTime / ZonedDateTime.
auto largestUnit = std::min(largestSubduration(m_duration), largestSubduration(other));
if (largestUnit <= TemporalUnit::Week) {
throwRangeError(globalObject, scope, "Cannot subtract a duration of years, months, or weeks without a relativeTo option"_s);
return { };
}
ISO8601::Duration result {
0, 0, 0, days() - other.days(),
hours() - other.hours(), minutes() - other.minutes(), seconds() - other.seconds(),
milliseconds() - other.milliseconds(), microseconds() - other.microseconds(), nanoseconds() - other.nanoseconds()
};
balance(result, largestUnit);
return result;
}
// RoundDuration ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds, increment, unit, roundingMode [ , relativeTo ] )
// https://tc39.es/proposal-temporal/#sec-temporal-roundduration
double TemporalDuration::round(ISO8601::Duration& duration, double increment, TemporalUnit unit, RoundingMode mode)
{
ASSERT(unit >= TemporalUnit::Day);
double remainder = 0;
if (unit == TemporalUnit::Day) {
auto originalDays = duration.days();
duration.setDays(0);
auto nanoseconds = totalNanoseconds(duration);
auto fractionalDays = originalDays + nanoseconds / nanosecondsPerDay;
auto newDays = roundNumberToIncrement(fractionalDays, increment, mode);
remainder = fractionalDays - newDays;
duration.setDays(newDays);
} else if (unit == TemporalUnit::Hour) {
auto fractionalSeconds = duration.seconds() + duration.milliseconds() * 1e-3 + duration.microseconds() * 1e-6 + duration.nanoseconds() * 1e-9;
auto fractionalHours = duration.hours() + (duration.minutes() + fractionalSeconds / 60) / 60;
auto newHours = roundNumberToIncrement(fractionalHours, increment, mode);
remainder = fractionalHours - newHours;
duration.setHours(newHours);
} else if (unit == TemporalUnit::Minute) {
auto fractionalSeconds = duration.seconds() + duration.milliseconds() * 1e-3 + duration.microseconds() * 1e-6 + duration.nanoseconds() * 1e-9;
auto fractionalMinutes = duration.minutes() + fractionalSeconds / 60;
auto newMinutes = roundNumberToIncrement(fractionalMinutes, increment, mode);
remainder = fractionalMinutes - newMinutes;
duration.setMinutes(newMinutes);
} else if (unit == TemporalUnit::Second) {
auto fractionalSeconds = duration.seconds() + duration.milliseconds() * 1e-3 + duration.microseconds() * 1e-6 + duration.nanoseconds() * 1e-9;
auto newSeconds = roundNumberToIncrement(fractionalSeconds, increment, mode);
remainder = fractionalSeconds - newSeconds;
duration.setSeconds(newSeconds);
} else if (unit == TemporalUnit::Millisecond) {
auto fractionalMilliseconds = duration.milliseconds() + duration.microseconds() * 1e-3 + duration.nanoseconds() * 1e-6;
auto newMilliseconds = roundNumberToIncrement(fractionalMilliseconds, increment, mode);
remainder = fractionalMilliseconds - newMilliseconds;
duration.setMilliseconds(newMilliseconds);
} else if (unit == TemporalUnit::Microsecond) {
auto fractionalMicroseconds = duration.microseconds() + duration.nanoseconds() * 1e-3;
auto newMicroseconds = roundNumberToIncrement(fractionalMicroseconds, increment, mode);
remainder = fractionalMicroseconds - newMicroseconds;
duration.setMicroseconds(newMicroseconds);
} else {
auto newNanoseconds = roundNumberToIncrement(duration.nanoseconds(), increment, mode);
remainder = duration.nanoseconds() - newNanoseconds;
duration.setNanoseconds(newNanoseconds);
}
for (auto i = static_cast<uint8_t>(unit) + 1u; i < numberOfTemporalUnits; i++)
duration[i] = 0;
return remainder;
}
ISO8601::Duration TemporalDuration::round(JSGlobalObject* globalObject, JSValue optionsValue) const
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSObject* options = intlGetOptionsObject(globalObject, optionsValue);
RETURN_IF_EXCEPTION(scope, { });
auto smallest = temporalSmallestUnit(globalObject, options, { });
RETURN_IF_EXCEPTION(scope, { });
TemporalUnit defaultLargestUnit = largestSubduration(m_duration);
auto largest = temporalLargestUnit(globalObject, options, { }, defaultLargestUnit);
RETURN_IF_EXCEPTION(scope, { });
if (!smallest && !largest) {
throwRangeError(globalObject, scope, "Cannot round without a smallestUnit or largestUnit option"_s);
return { };
}
if (smallest && largest && smallest.value() < largest.value()) {
throwRangeError(globalObject, scope, "smallestUnit must be smaller than largestUnit"_s);
return { };
}
TemporalUnit smallestUnit = smallest.value_or(TemporalUnit::Nanosecond);
TemporalUnit largestUnit = largest.value_or(std::min(defaultLargestUnit, smallestUnit));
auto roundingMode = temporalRoundingMode(globalObject, options, RoundingMode::HalfExpand);
RETURN_IF_EXCEPTION(scope, { });
auto increment = temporalRoundingIncrement(globalObject, options, maximumRoundingIncrement(smallestUnit), false);
RETURN_IF_EXCEPTION(scope, { });
// FIXME: Implement relativeTo parameter after PlainDateTime / ZonedDateTime.
if (largestUnit > TemporalUnit::Year && (years() || months() || weeks() || (days() && largestUnit < TemporalUnit::Day))) {
throwRangeError(globalObject, scope, "Cannot round a duration of years, months, or weeks without a relativeTo option"_s);
return { };
}
if (largestUnit <= TemporalUnit::Week) {
throwVMError(globalObject, scope, "FIXME: years, months, or weeks rounding with relativeTo not implemented yet"_s);
return { };
}
ISO8601::Duration newDuration = m_duration;
round(newDuration, increment, smallestUnit, roundingMode);
balance(newDuration, largestUnit);
return newDuration;
}
double TemporalDuration::total(JSGlobalObject* globalObject, JSValue optionsValue) const
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSObject* options = intlGetOptionsObject(globalObject, optionsValue);
RETURN_IF_EXCEPTION(scope, 0);
String unitString = intlStringOption(globalObject, options, vm.propertyNames->unit, { }, nullptr, nullptr);
RETURN_IF_EXCEPTION(scope, 0);
auto unitType = temporalUnitType(unitString);
if (!unitType) {
throwRangeError(globalObject, scope, "unit is an invalid Temporal unit"_s);
return 0;
}
TemporalUnit unit = unitType.value();
// FIXME: Implement relativeTo parameter after PlainDateTime / ZonedDateTime.
if (unit > TemporalUnit::Year && (years() || months() || weeks() || (days() && unit < TemporalUnit::Day))) {
throwRangeError(globalObject, scope, "Cannot total a duration of years, months, or weeks without a relativeTo option"_s);
return { };
}
ISO8601::Duration newDuration = m_duration;
balance(newDuration, unit);
double remainder = round(newDuration, 1, unit, RoundingMode::Trunc);
return newDuration[static_cast<uint8_t>(unit)] + remainder;
}
String TemporalDuration::toString(JSGlobalObject* globalObject, JSValue optionsValue) const
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSObject* options = intlGetOptionsObject(globalObject, optionsValue);
RETURN_IF_EXCEPTION(scope, { });
if (!options)
return toString();
PrecisionData data = secondsStringPrecision(globalObject, options);
RETURN_IF_EXCEPTION(scope, { });
if (data.unit < TemporalUnit::Second) {
throwRangeError(globalObject, scope, "smallestUnit must not be \"minute\""_s);
return { };
}
auto roundingMode = temporalRoundingMode(globalObject, options, RoundingMode::Trunc);
RETURN_IF_EXCEPTION(scope, { });
// No need to make a new object if we were given explicit defaults.
if (std::get<0>(data.precision) == Precision::Auto && roundingMode == RoundingMode::Trunc)
return toString();
ISO8601::Duration newDuration = m_duration;
round(newDuration, data.increment, data.unit, roundingMode);
return toString(newDuration, data.precision);
}
// TemporalDurationToString ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds, precision )
// https://tc39.es/proposal-temporal/#sec-temporal-temporaldurationtostring
String TemporalDuration::toString(const ISO8601::Duration& duration, std::tuple<Precision, unsigned> precision)
{
ASSERT(std::get<0>(precision) == Precision::Auto || std::get<1>(precision) < 10);
auto balancedMicroseconds = duration.microseconds() + std::trunc(duration.nanoseconds() / 1000);
auto balancedNanoseconds = std::fmod(duration.nanoseconds(), 1000);
auto balancedMilliseconds = duration.milliseconds() + std::trunc(balancedMicroseconds / 1000);
balancedMicroseconds = std::fmod(balancedMicroseconds, 1000);
auto balancedSeconds = duration.seconds() + std::trunc(balancedMilliseconds / 1000);
balancedMilliseconds = std::fmod(balancedMilliseconds, 1000);
// TEMPORARY! (pending spec discussion about maximum values @ https://github.com/tc39/proposal-temporal/issues/1604)
// We *must* avoid printing a number in scientific notation, which is currently only possible for numbers < 1e21
// (a value originating in the Number#toFixed spec and upheld by our NumberToStringBuffer).
auto formatInteger = [](double value) -> double {
auto absValue = std::abs(value);
return LIKELY(absValue < 1e21) ? absValue : 1e21 - 65537;
};
StringBuilder builder;
auto sign = TemporalDuration::sign(duration);
if (sign < 0)
builder.append('-');
builder.append('P');
if (duration.years())
builder.append(formatInteger(duration.years()), 'Y');
if (duration.months())
builder.append(formatInteger(duration.months()), 'M');
if (duration.weeks())
builder.append(formatInteger(duration.weeks()), 'W');
if (duration.days())
builder.append(formatInteger(duration.days()), 'D');
// The zero value is displayed in seconds.
auto usesSeconds = balancedSeconds || balancedMilliseconds || balancedMicroseconds || balancedNanoseconds || !sign;
if (!duration.hours() && !duration.minutes() && !usesSeconds)
return builder.toString();
builder.append('T');
if (duration.hours())
builder.append(formatInteger(duration.hours()), 'H');
if (duration.minutes())
builder.append(formatInteger(duration.minutes()), 'M');
if (usesSeconds) {
builder.append(formatInteger(balancedSeconds));
auto fraction = std::abs(balancedMilliseconds) * 1e6 + std::abs(balancedMicroseconds) * 1e3 + std::abs(balancedNanoseconds);
formatSecondsStringFraction(builder, fraction, precision);
builder.append('S');
}
return builder.toString();
}
} // namespace JSC