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<?php
/**
* Copyright (c) 2014 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Licensed under the MIT license:
* http://opensource.org/licenses/MIT
*/
namespace Icewind\SMB\Native;
use Icewind\SMB\StringBuffer;
/**
* Stream optimized for write only usage
*/
class NativeWriteStream extends NativeStream {
const CHUNK_SIZE = 1048576; // 1MB chunks
/** @var StringBuffer */
private $writeBuffer;
/** @var int */
private $pos = 0;
public function __construct() {
$this->writeBuffer = new StringBuffer();
}
public function stream_open($path, $mode, $options, &$opened_path): bool {
return parent::stream_open($path, $mode, $options, $opened_path);
}
/**
* Wrap a stream from libsmbclient-php into a regular php stream
*
* @param NativeState $state
* @param resource $smbStream
* @param string $mode
* @param string $url
* @return resource
*/
public static function wrap(NativeState $state, $smbStream, string $mode, string $url) {
return parent::wrapClass($state, $smbStream, $mode, $url, NativeWriteStream::class);
}
public function stream_seek($offset, $whence = SEEK_SET) {
$this->flushWrite();
$result = parent::stream_seek($offset, $whence);
if ($result) {
$pos = parent::stream_tell();
if ($pos === false) {
return false;
}
$this->pos = $pos;
}
return $result;
}
private function flushWrite(): void {
parent::stream_write($this->writeBuffer->flush());
}
public function stream_write($data) {
$written = $this->writeBuffer->push($data);
$this->pos += $written;
if ($this->writeBuffer->remaining() >= self::CHUNK_SIZE) {
$this->flushWrite();
}
return $written;
}
public function stream_close() {
try {
$this->flushWrite();
$flushResult = true;
} catch (\Exception $e) {
$flushResult = false;
}
return parent::stream_close() && $flushResult;
}
public function stream_tell() {
return $this->pos;
}
public function stream_read($count) {
return false;
}
public function stream_truncate($size) {
$this->flushWrite();
$this->pos = $size;
return parent::stream_truncate($size);
}
}
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