Proyectos de Subversion Moodle

<?php

declare(strict_types=1);

namespace ZipStream;

use DateInterval;

use DateTimeImmutable;

use DateTimeInterface;

use ZipStream\Exception\DosTimeOverflowException;

/**

 * @internal

 */

abstract class Time

{

    private const DOS_MINIMUM_DATE = '1980-01-01 00:00:00Z';

    public static function dateTimeToDosTime(DateTimeInterface $dateTime): int

    {

        $dosMinimumDate = new DateTimeImmutable(self::DOS_MINIMUM_DATE);

        if ($dateTime->getTimestamp() < $dosMinimumDate->getTimestamp()) {

            throw new DosTimeOverflowException(dateTime: $dateTime);

        }

        $dateTime = DateTimeImmutable::createFromInterface($dateTime)->sub(new DateInterval('P1980Y'));

        [$year, $month, $day, $hour, $minute, $second] = explode(' ', $dateTime->format('Y n j G i s'));

        return

            ((int) $year << 25) |

            ((int) $month << 21) |

            ((int) $day << 16) |

            ((int) $hour << 11) |

            ((int) $minute << 5) |

            ((int) $second >> 1);

    }

}