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File / Folder	Size	Action
.	-
Command	--	ren
Factory	--	ren
AbstractUid.php	4.825KB	edt ren
BinaryUtil.php	5.895KB	edt ren
CHANGELOG.md	0.938KB	edt ren
LICENSE	1.043KB	edt ren
MaxUlid.php	0.374KB	edt ren
MaxUuid.php	0.405KB	edt ren
NilUlid.php	0.374KB	edt ren
NilUuid.php	0.461KB	edt ren
README.md	0.59KB	edt ren
TimeBasedUidInterface.php	0.507KB	edt ren
Ulid.php	6.859KB	edt ren
Uuid.php	5.686KB	edt ren
UuidV1.php	2.025KB	edt ren
UuidV3.php	0.578KB	edt ren
UuidV4.php	0.91KB	edt ren
UuidV5.php	0.578KB	edt ren
UuidV6.php	2.023KB	edt ren
UuidV7.php	5.003KB	edt ren
UuidV8.php	0.56KB	edt ren
composer.json	0.9KB	edt ren

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Uid;

/**
 * @internal
 *
 * @author Nicolas Grekas <p@tchwork.com>
 */
class BinaryUtil
{
    public const BASE10 = [
        '' => '0123456789',
        0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
    ];

public const BASE58 = [
        '' => '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz',
        1 => 0, 1, 2, 3, 4, 5, 6, 7, 8, 'A' => 9,
        'B' => 10, 'C' => 11, 'D' => 12, 'E' => 13, 'F' => 14, 'G' => 15,
        'H' => 16, 'J' => 17, 'K' => 18, 'L' => 19, 'M' => 20, 'N' => 21,
        'P' => 22, 'Q' => 23, 'R' => 24, 'S' => 25, 'T' => 26, 'U' => 27,
        'V' => 28, 'W' => 29, 'X' => 30, 'Y' => 31, 'Z' => 32, 'a' => 33,
        'b' => 34, 'c' => 35, 'd' => 36, 'e' => 37, 'f' => 38, 'g' => 39,
        'h' => 40, 'i' => 41, 'j' => 42, 'k' => 43, 'm' => 44, 'n' => 45,
        'o' => 46, 'p' => 47, 'q' => 48, 'r' => 49, 's' => 50, 't' => 51,
        'u' => 52, 'v' => 53, 'w' => 54, 'x' => 55, 'y' => 56, 'z' => 57,
    ];

// https://tools.ietf.org/html/rfc4122#section-4.1.4
    // 0x01b21dd213814000 is the number of 100-ns intervals between the
    // UUID epoch 1582-10-15 00:00:00 and the Unix epoch 1970-01-01 00:00:00.
    private const TIME_OFFSET_INT = 0x01B21DD213814000;
    private const TIME_OFFSET_BIN = "\x01\xb2\x1d\xd2\x13\x81\x40\x00";
    private const TIME_OFFSET_COM1 = "\xfe\x4d\xe2\x2d\xec\x7e\xbf\xff";
    private const TIME_OFFSET_COM2 = "\xfe\x4d\xe2\x2d\xec\x7e\xc0\x00";

public static function toBase(string $bytes, array $map): string
    {
        $base = \strlen($alphabet = $map['']);
        $bytes = array_values(unpack(\PHP_INT_SIZE >= 8 ? 'n*' : 'C*', $bytes));
        $digits = '';

while ($count = \count($bytes)) {
            $quotient = [];
            $remainder = 0;

for ($i = 0; $i !== $count; ++$i) {
                $carry = $bytes[$i] + ($remainder << (\PHP_INT_SIZE >= 8 ? 16 : 8));
                $digit = intdiv($carry, $base);
                $remainder = $carry % $base;

if ($digit || $quotient) {
                    $quotient[] = $digit;
                }
            }

$digits = $alphabet[$remainder].$digits;
            $bytes = $quotient;
        }

return $digits;
    }

public static function fromBase(string $digits, array $map): string
    {
        $base = \strlen($map['']);
        $count = \strlen($digits);
        $bytes = [];

while ($count) {
            $quotient = [];
            $remainder = 0;

for ($i = 0; $i !== $count; ++$i) {
                $carry = ($bytes ? $digits[$i] : $map[$digits[$i]]) + $remainder * $base;

if (\PHP_INT_SIZE >= 8) {
                    $digit = $carry >> 16;
                    $remainder = $carry & 0xFFFF;
                } else {
                    $digit = $carry >> 8;
                    $remainder = $carry & 0xFF;
                }

if ($digit || $quotient) {
                    $quotient[] = $digit;
                }
            }

$bytes[] = $remainder;
            $count = \count($digits = $quotient);
        }

return pack(\PHP_INT_SIZE >= 8 ? 'n*' : 'C*', ...array_reverse($bytes));
    }

public static function add(string $a, string $b): string
    {
        $carry = 0;
        for ($i = 7; 0 <= $i; --$i) {
            $carry += \ord($a[$i]) + \ord($b[$i]);
            $a[$i] = \chr($carry & 0xFF);
            $carry >>= 8;
        }

return $a;
    }

/**
     * @param string $time Count of 100-nanosecond intervals since the UUID epoch 1582-10-15 00:00:00 in hexadecimal
     */
    public static function hexToDateTime(string $time): \DateTimeImmutable
    {
        if (\PHP_INT_SIZE >= 8) {
            $time = (string) (hexdec($time) - self::TIME_OFFSET_INT);
        } else {
            $time = str_pad(hex2bin($time), 8, "\0", \STR_PAD_LEFT);

if (self::TIME_OFFSET_BIN <= $time) {
                $time = self::add($time, self::TIME_OFFSET_COM2);
                $time[0] = $time[0] & "\x7F";
                $time = self::toBase($time, self::BASE10);
            } else {
                $time = self::add($time, self::TIME_OFFSET_COM1);
                $time = '-'.self::toBase($time ^ "\xff\xff\xff\xff\xff\xff\xff\xff", self::BASE10);
            }
        }

if (9 > \strlen($time)) {
            $time = '-' === $time[0] ? '-'.str_pad(substr($time, 1), 8, '0', \STR_PAD_LEFT) : str_pad($time, 8, '0', \STR_PAD_LEFT);
        }

return \DateTimeImmutable::createFromFormat('U.u?', substr_replace($time, '.', -7, 0));
    }

/**
     * @return string Count of 100-nanosecond intervals since the UUID epoch 1582-10-15 00:00:00 in hexadecimal
     */
    public static function dateTimeToHex(\DateTimeInterface $time): string
    {
        if (\PHP_INT_SIZE >= 8) {
            if (-self::TIME_OFFSET_INT > $time = (int) $time->format('Uu0')) {
                throw new \InvalidArgumentException('The given UUID date cannot be earlier than 1582-10-15.');
            }

return str_pad(dechex(self::TIME_OFFSET_INT + $time), 16, '0', \STR_PAD_LEFT);
        }

$time = $time->format('Uu0');
        $negative = '-' === $time[0];
        if ($negative && self::TIME_OFFSET_INT < $time = substr($time, 1)) {
            throw new \InvalidArgumentException('The given UUID date cannot be earlier than 1582-10-15.');
        }
        $time = self::fromBase($time, self::BASE10);
        $time = str_pad($time, 8, "\0", \STR_PAD_LEFT);

if ($negative) {
            $time = self::add($time, self::TIME_OFFSET_COM1) ^ "\xff\xff\xff\xff\xff\xff\xff\xff";
        } else {
            $time = self::add($time, self::TIME_OFFSET_BIN);
        }

return bin2hex($time);
    }
}

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