78 lines
2.6 KiB
PHP
78 lines
2.6 KiB
PHP
<?php
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/**
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* Buffered raw stream.
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*
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* This file is part of MadelineProto.
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* MadelineProto is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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* MadelineProto is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Affero General Public License for more details.
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* You should have received a copy of the GNU General Public License along with MadelineProto.
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* If not, see <http://www.gnu.org/licenses/>.
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*
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* @author Daniil Gentili <daniil@daniil.it>
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* @copyright 2016-2020 Daniil Gentili <daniil@daniil.it>
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* @license https://opensource.org/licenses/AGPL-3.0 AGPLv3
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*
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* @link https://docs.madelineproto.xyz MadelineProto documentation
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*/
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namespace danog\MadelineProto\Stream\Common;
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use danog\MadelineProto\Stream\BufferedStreamInterface;
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use danog\MadelineProto\Stream\BufferInterface;
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use danog\MadelineProto\Stream\RawStreamInterface;
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/**
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* Buffered raw stream, that simply returns less data on EOF instead of throwing.
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*
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* @author Daniil Gentili <daniil@daniil.it>
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*/
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class SimpleBufferedRawStream extends BufferedRawStream implements BufferedStreamInterface, BufferInterface, RawStreamInterface
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{
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/**
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* Read data asynchronously.
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*
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* @param int $length Amount of data to read
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*
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* @return \Generator
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*/
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public function bufferReadGenerator(int $length): \Generator
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{
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$size = \fstat($this->memory_stream)['size'];
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$offset = \ftell($this->memory_stream);
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$buffer_length = $size - $offset;
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if ($buffer_length < $length && $buffer_length) {
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\fseek($this->memory_stream, $offset + $buffer_length);
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}
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while ($buffer_length < $length) {
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$chunk = yield $this->read();
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if ($chunk === null) {
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break;
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}
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\fwrite($this->memory_stream, $chunk);
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$buffer_length += \strlen($chunk);
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}
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\fseek($this->memory_stream, $offset);
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return \fread($this->memory_stream, $length);
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}
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/**
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* {@inheritDoc}
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*
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* @return RawStreamInterface
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*/
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public function getStream(): RawStreamInterface
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{
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return $this->stream;
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}
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/**
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* Get class name.
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*
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* @return string
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*/
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public static function getName(): string
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{
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return __CLASS__;
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}
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}
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