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40 lines
1.0 KiB
40 lines
1.0 KiB
2 months ago
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<?php
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declare(strict_types=1);
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namespace ZipStream;
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use DateInterval;
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use DateTimeImmutable;
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use DateTimeInterface;
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use ZipStream\Exception\DosTimeOverflowException;
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/**
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* @internal
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*/
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abstract class Time
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{
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private const DOS_MINIMUM_DATE = '1980-01-01 00:00:00Z';
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public static function dateTimeToDosTime(DateTimeInterface $dateTime): int
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{
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$dosMinimumDate = new DateTimeImmutable(self::DOS_MINIMUM_DATE);
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if ($dateTime->getTimestamp() < $dosMinimumDate->getTimestamp()) {
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throw new DosTimeOverflowException(dateTime: $dateTime);
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}
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$dateTime = DateTimeImmutable::createFromInterface($dateTime)->sub(new DateInterval('P1980Y'));
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[$year, $month, $day, $hour, $minute, $second] = explode(' ', $dateTime->format('Y n j G i s'));
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return
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((int) $year << 25) |
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((int) $month << 21) |
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((int) $day << 16) |
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((int) $hour << 11) |
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((int) $minute << 5) |
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((int) $second >> 1);
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}
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}
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