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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\Streams;
/**
* Base class for stream wrappers, wraps an existing stream
*
* This wrapper itself doesn't implement any functionality but is just a base class for other wrappers to extend
*/
abstract class Wrapper extends WrapperHandler implements File, Directory {
/**
* @var resource
*/
public $context;
/**
* The wrapped stream
*
* @var resource
*/
protected $source;
/**
* @param resource $source
*/
protected function setSourceStream($source) {
$this->source = $source;
}
protected function loadContext($name = null) {
$context = parent::loadContext($name);
if (isset($context['source']) and is_resource($context['source'])) {
$this->setSourceStream($context['source']);
} else {
throw new \BadMethodCallException('Invalid context, source not set');
}
return $context;
}
public function stream_seek($offset, $whence = SEEK_SET) {
$result = fseek($this->source, $offset, $whence);
return $result == 0 ? true : false;
}
public function stream_tell() {
return ftell($this->source);
}
public function stream_read($count) {
return fread($this->source, $count);
}
public function stream_write($data) {
return fwrite($this->source, $data);
}
public function stream_set_option($option, $arg1, $arg2) {
switch ($option) {
case STREAM_OPTION_BLOCKING:
return stream_set_blocking($this->source, (bool)$arg1);
case STREAM_OPTION_READ_TIMEOUT:
return stream_set_timeout($this->source, $arg1, $arg2);
case STREAM_OPTION_WRITE_BUFFER:
return stream_set_write_buffer($this->source, $arg1) === 0;
}
return false;
}
public function stream_truncate($size) {
return ftruncate($this->source, $size);
}
public function stream_stat() {
return fstat($this->source);
}
public function stream_lock($mode) {
return flock($this->source, $mode);
}
public function stream_flush() {
return fflush($this->source);
}
public function stream_eof() {
return feof($this->source);
}
public function stream_close() {
return fclose($this->source);
}
public function dir_readdir() {
return readdir($this->source);
}
public function dir_closedir() {
closedir($this->source);
return true;
}
public function dir_rewinddir() {
return rewind($this->source);
}
}
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