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<?php /** * This file is part of the ramsey/uuid library * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. * * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com> * @license http://opensource.org/licenses/MIT MIT * @link https://benramsey.com/projects/ramsey-uuid/ Documentation * @link https://packagist.org/packages/ramsey/uuid Packagist * @link https://github.com/ramsey/uuid GitHub / namespace Ramsey\Uuid\Codec; use Ramsey\Uuid\UuidInterface; /* * GuidStringCodec encodes and decodes globally unique identifiers (GUID) * * @link https://en.wikipedia.org/wiki/Globally_unique_identifier / class GuidStringCodec extends StringCodec { /* * Encodes a UuidInterface as a string representation of a GUID * * @param UuidInterface $uuid * @return string Hexadecimal string representation of a GUID / public function encode(UuidInterface $uuid) { $components = array_values($uuid->getFieldsHex()); // Swap byte-order on the first three fields $this->swapFields($components); return vsprintf( '%08s-%04s-%04s-%02s%02s-%012s', $components ); } /* * Encodes a UuidInterface as a binary representation of a GUID * * @param UuidInterface $uuid * @return string Binary string representation of a GUID / public function encodeBinary(UuidInterface $uuid) { $components = array_values($uuid->getFieldsHex()); return hex2bin(implode('', $components)); } /* * Decodes a string representation of a GUID into a UuidInterface object instance * * @param string $encodedUuid * @return UuidInterface * @throws \Ramsey\Uuid\Exception\InvalidUuidStringException / public function decode($encodedUuid) { $components = $this->extractComponents($encodedUuid); $this->swapFields($components); return $this->getBuilder()->build($this, $this->getFields($components)); } /* * Decodes a binary representation of a GUID into a UuidInterface object instance * * @param string $bytes * @return UuidInterface * @throws \Ramsey\Uuid\Exception\InvalidUuidStringException / public function decodeBytes($bytes) { // Specifically call parent::decode to preserve correct byte order return parent::decode(bin2hex($bytes)); } /* * Swaps fields to support GUID byte order * * @param array $components An array of UUID components (the UUID exploded on its dashes) * @return void / protected function swapFields(array &$components) { $hex = unpack('H', pack('L', hexdec($components[0]))); $components[0] = $hex[1]; $hex = unpack('H', pack('S', hexdec($components[1]))); $components[1] = $hex[1]; $hex = unpack('H', pack('S', hexdec($components[2]))); $components[2] = $hex[1]; } }