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<?php
/**
* @package Joomla.Platform
* @subpackage FileSystem
*
* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
jimport('joomla.filesystem.support.stringcontroller');
/**
* String Stream Wrapper
*
* This class allows you to use a PHP string in the same way that
* you would normally use a regular stream wrapper
*
* @package Joomla.Platform
* @subpackage FileSystem
* @since 11.1
*/
class JStreamString
{
/**
* The current string
*
* @var string
* @since 11.1
*/
protected $_currentstring;
/**
*
* The path
*
* @var string
* @since 11.1
*/
protected $_path;
/**
*
* The mode
*
* @var string
* @since 11.1
*/
protected $_mode;
/**
*
* Enter description here ...
* @var string
*
* @since 11.1
*/
protected $_options;
/**
*
* Enter description here ...
* @var string
*
* @since 11.1
*/
protected $_opened_path;
/**
* Current position
*
* @var integer
* @since 11.1
*/
protected $_pos;
/**
* Length of the string
*
* @var string
*
* @since 11.1
*/
protected $_len;
/**
* Statistics for a file
*
* @var array
* @since 11.1
*
* @see http://us.php.net/manual/en/function.stat.php
*/
protected $_stat;
/**
* Method to open a file or URL.
*
* @param string $path The stream path.
* @param string $mode Not used.
* @param integer $options Not used.
* @param string &$opened_path Not used.
*
* @return boolean
*
* @since 11.1
*/
public function stream_open($path, $mode, $options, &$opened_path)
{
$this->_currentstring = &JStringController::getRef(str_replace('string://', '', $path));
if ($this->_currentstring)
{
$this->_len = strlen($this->_currentstring);
$this->_pos = 0;
$this->_stat = $this->url_stat($path, 0);
return true;
}
else
{
return false;
}
}
/**
* Method to retrieve information from a file resource
*
* @return array
*
* @see http://www.php.net/manual/en/streamwrapper.stream-stat.php
* @since 11.1
*/
public function stream_stat()
{
return $this->_stat;
}
/**
* Method to retrieve information about a file.
*
* @param string $path File path or URL to stat
* @param integer $flags Additional flags set by the streams API
*
* @return array
*
* @see http://php.net/manual/en/streamwrapper.url-stat.php
* @since 11.1
*/
public function url_stat($path, $flags = 0)
{
$now = time();
$string = &JStringController::getRef(str_replace('string://', '', $path));
$stat = array(
'dev' => 0,
'ino' => 0,
'mode' => 0,
'nlink' => 1,
'uid' => 0,
'gid' => 0,
'rdev' => 0,
'size' => strlen($string),
'atime' => $now,
'mtime' => $now,
'ctime' => $now,
'blksize' => '512',
'blocks' => ceil(strlen($string) / 512));
return $stat;
}
/**
* Method to read a given number of bytes starting at the current position
* and moving to the end of the string defined by the current position plus the
* given number.
*
* @param integer $count Bytes of data from the current position should be returned.
*
* @return void
*
* @since 11.1
*
* @see http://www.php.net/manual/en/streamwrapper.stream-read.php
*/
public function stream_read($count)
{
$result = substr($this->_currentstring, $this->_pos, $count);
$this->_pos += $count;
return $result;
}
/**
* Stream write, always returning false.
*
* @param string $data The data to write.
*
* @return boolean
*
* @since 11.1
* @note Updating the string is not supported.
*/
public function stream_write($data)
{
// We don't support updating the string.
return false;
}
/**
* Method to get the current position
*
* @return integer The position
*
* @since 11.1
*/
public function stream_tell()
{
return $this->_pos;
}
/**
* End of field check
*
* @return boolean True if at end of field.
*
* @since 11.1
*/
public function stream_eof()
{
if ($this->_pos > $this->_len)
{
return true;
}
return false;
}
/**
* Stream offset
*
* @param integer $offset The starting offset.
* @param integer $whence SEEK_SET, SEEK_CUR, SEEK_END
*
* @return boolean True on success.
*
* @since 11.1
*/
public function stream_seek($offset, $whence)
{
// $whence: SEEK_SET, SEEK_CUR, SEEK_END
if ($offset > $this->_len)
{
// We can't seek beyond our len.
return false;
}
switch ($whence)
{
case SEEK_SET:
$this->_pos = $offset;
break;
case SEEK_CUR:
if (($this->_pos + $offset) < $this->_len)
{
$this->_pos += $offset;
}
else
{
return false;
}
break;
case SEEK_END:
$this->_pos = $this->_len - $offset;
break;
}
return true;
}
/**
* Stream flush, always returns true.
*
* @return boolean
*
* @since 11.1
* @note Data storage is not supported
*/
public function stream_flush()
{
// We don't store data.
return true;
}
}
stream_wrapper_register('string', 'JStreamString') or die(JText::_('JLIB_FILESYSTEM_STREAM_FAILED'));