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File / Folder	Size	Action
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Boundaries.php	12.146KB	edt ren
Cast.php	1.159KB	edt ren
Comparison.php	46.094KB	edt ren
Converter.php	14.122KB	edt ren
Creator.php	31.392KB	edt ren
Date.php	228.161KB	edt ren
DeprecatedPeriodPropert...	1.89KB	edt ren
Difference.php	42.634KB	edt ren
IntervalRounding.php	1.649KB	edt ren
IntervalStep.php	2.36KB	edt ren
LocalFactory.php	1.588KB	edt ren
Localization.php	25.531KB	edt ren
Macro.php	2.706KB	edt ren
MagicParameter.php	0.729KB	edt ren
Mixin.php	6.183KB	edt ren
Modifiers.php	13.589KB	edt ren
Mutability.php	1.286KB	edt ren
ObjectInitialisation.php	0.438KB	edt ren
Options.php	5.922KB	edt ren
Rounding.php	6.927KB	edt ren
Serialization.php	8.872KB	edt ren
StaticLocalization.php	2.331KB	edt ren
StaticOptions.php	5.276KB	edt ren
Test.php	6.444KB	edt ren
Timestamp.php	6.451KB	edt ren
ToStringFormat.php	1.416KB	edt ren
Units.php	14.312KB	edt ren
Week.php	7.545KB	edt ren

<?php

declare(strict_types=1);

/**
 * This file is part of the Carbon package.
 *
 * (c) Brian Nesbitt <brian@nesbot.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Carbon\Traits;

use Carbon\CarbonInterface;
use Carbon\Exceptions\UnknownUnitException;
use Carbon\WeekDay;
use DateInterval;

/**
 * Trait Rounding.
 *
 * Round, ceil, floor units.
 *
 * Depends on the following methods:
 *
 * @method static copy()
 * @method static startOfWeek(int $weekStartsAt = null)
 */
trait Rounding
{
    use IntervalRounding;

/**
     * Round the current instance at the given unit with given precision if specified and the given function.
     */
    public function roundUnit(
        string $unit,
        DateInterval|string|float|int $precision = 1,
        callable|string $function = 'round',
    ): static {
        $metaUnits = [
            // @call roundUnit
            'millennium' => [static::YEARS_PER_MILLENNIUM, 'year'],
            // @call roundUnit
            'century' => [static::YEARS_PER_CENTURY, 'year'],
            // @call roundUnit
            'decade' => [static::YEARS_PER_DECADE, 'year'],
            // @call roundUnit
            'quarter' => [static::MONTHS_PER_QUARTER, 'month'],
            // @call roundUnit
            'millisecond' => [1000, 'microsecond'],
        ];
        $normalizedUnit = static::singularUnit($unit);
        $ranges = array_merge(static::getRangesByUnit($this->daysInMonth), [
            // @call roundUnit
            'microsecond' => [0, 999999],
        ]);
        $factor = 1;

if ($normalizedUnit === 'week') {
            $normalizedUnit = 'day';
            $precision *= static::DAYS_PER_WEEK;
        }

if (isset($metaUnits[$normalizedUnit])) {
            [$factor, $normalizedUnit] = $metaUnits[$normalizedUnit];
        }

$precision *= $factor;

if (!isset($ranges[$normalizedUnit])) {
            throw new UnknownUnitException($unit);
        }

$found = false;
        $fraction = 0;
        $arguments = null;
        $initialValue = null;
        $factor = $this->year < 0 ? -1 : 1;
        $changes = [];
        $minimumInc = null;

foreach ($ranges as $unit => [$minimum, $maximum]) {
            if ($normalizedUnit === $unit) {
                $arguments = [$this->$unit, $minimum];
                $initialValue = $this->$unit;
                $fraction = $precision - floor($precision);
                $found = true;

continue;
            }

if ($found) {
                $delta = $maximum + 1 - $minimum;
                $factor /= $delta;
                $fraction *= $delta;
                $inc = ($this->$unit - $minimum) * $factor;

if ($inc !== 0.0) {
                    $minimumInc = $minimumInc ?? ($arguments[0] / pow(2, 52));

// If value is still the same when adding a non-zero increment/decrement,
                    // it means precision got lost in the addition
                    if (abs($inc) < $minimumInc) {
                        $inc = $minimumInc * ($inc < 0 ? -1 : 1);
                    }

// If greater than $precision, assume precision loss caused an overflow
                    if ($function !== 'floor' || abs($arguments[0] + $inc - $initialValue) >= $precision) {
                        $arguments[0] += $inc;
                    }
                }

$changes[$unit] = round(
                    $minimum + ($fraction ? $fraction * $function(($this->$unit - $minimum) / $fraction) : 0),
                );

// Cannot use modulo as it lose double precision
                while ($changes[$unit] >= $delta) {
                    $changes[$unit] -= $delta;
                }

$fraction -= floor($fraction);
            }
        }

[$value, $minimum] = $arguments;
        $normalizedValue = floor($function(($value - $minimum) / $precision) * $precision + $minimum);

/** @var CarbonInterface $result */
        $result = $this;

foreach ($changes as $unit => $value) {
            $result = $result->$unit($value);
        }

return $result->$normalizedUnit($normalizedValue);
    }

/**
     * Truncate the current instance at the given unit with given precision if specified.
     */
    public function floorUnit(string $unit, DateInterval|string|float|int $precision = 1): static
    {
        return $this->roundUnit($unit, $precision, 'floor');
    }

/**
     * Ceil the current instance at the given unit with given precision if specified.
     */
    public function ceilUnit(string $unit, DateInterval|string|float|int $precision = 1): static
    {
        return $this->roundUnit($unit, $precision, 'ceil');
    }

/**
     * Round the current instance second with given precision if specified.
     */
    public function round(DateInterval|string|float|int $precision = 1, callable|string $function = 'round'): static
    {
        return $this->roundWith($precision, $function);
    }

/**
     * Round the current instance second with given precision if specified.
     */
    public function floor(DateInterval|string|float|int $precision = 1): static
    {
        return $this->round($precision, 'floor');
    }

/**
     * Ceil the current instance second with given precision if specified.
     */
    public function ceil(DateInterval|string|float|int $precision = 1): static
    {
        return $this->round($precision, 'ceil');
    }

/**
     * Round the current instance week.
     *
     * @param WeekDay|int|null $weekStartsAt optional start allow you to specify the day of week to use to start the week
     */
    public function roundWeek(WeekDay|int|null $weekStartsAt = null): static
    {
        return $this->closest(
            $this->avoidMutation()->floorWeek($weekStartsAt),
            $this->avoidMutation()->ceilWeek($weekStartsAt),
        );
    }

/**
     * Truncate the current instance week.
     *
     * @param WeekDay|int|null $weekStartsAt optional start allow you to specify the day of week to use to start the week
     */
    public function floorWeek(WeekDay|int|null $weekStartsAt = null): static
    {
        return $this->startOfWeek($weekStartsAt);
    }

/**
     * Ceil the current instance week.
     *
     * @param WeekDay|int|null $weekStartsAt optional start allow you to specify the day of week to use to start the week
     */
    public function ceilWeek(WeekDay|int|null $weekStartsAt = null): static
    {
        if ($this->isMutable()) {
            $startOfWeek = $this->avoidMutation()->startOfWeek($weekStartsAt);

return $startOfWeek != $this ?
                $this->startOfWeek($weekStartsAt)->addWeek() :
                $this;
        }

$startOfWeek = $this->startOfWeek($weekStartsAt);

return $startOfWeek != $this ?
            $startOfWeek->addWeek() :
            $this->avoidMutation();
    }
}

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