79 lines
2.0 KiB
PHP
79 lines
2.0 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
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*
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace Icewind\Streams;
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abstract class HashWrapper extends Wrapper {
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/**
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* @var callable|null
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*/
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private $callback;
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/**
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* @var resource|\HashContext
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*/
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private $hashContext;
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/**
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* Wraps a stream to make it seekable
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*
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* @param resource $source
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* @param string $hash
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* @param callable $callback
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* @return resource|bool
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*
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* @throws \BadMethodCallException
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*/
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public static function wrap($source, $hash, $callback) {
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$context = [
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'hash' => $hash,
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'callback' => $callback,
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];
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return self::wrapSource($source, $context);
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}
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public function dir_opendir($path, $options) {
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return false;
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}
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public function stream_open($path, $mode, $options, &$opened_path) {
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$context = $this->loadContext();
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$this->callback = $context['callback'];
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$this->hashContext = hash_init($context['hash']);
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return true;
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}
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protected function updateHash($data) {
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hash_update($this->hashContext, $data);
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}
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public function stream_close() {
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$hash = hash_final($this->hashContext);
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if ($this->hashContext !== false && is_callable($this->callback)) {
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call_user_func($this->callback, $hash);
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}
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return parent::stream_close();
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}
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}
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