egroupware_official/phpgwapi/inc/class.global_stream_wrapper.inc.php

78 lines
2.0 KiB
PHP

<?php
/**
* eGroupWare API: VFS - stream wrapper interface
*
* @link http://www.egroupware.org
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @subpackage vfs
* @version $Id$
*/
/**
* eGroupWare API: stream wrapper for global variables,
*
* Original from an expample on php.net:
* @see http://de.php.net/manual/en/function.stream-wrapper-register.php
*
* Use as global://varname
*
* @todo: allow to use path to access arrays: global://varname/key1/key2 to access $string from $GLOBALS['varname'] = array('key1'=>array('key2'=>$string));
*/
class global_stream_wrapper
{
private $pos;
private $stream;
public function stream_open($path, $mode, $options, &$opened_path)
{
$this->stream = &$GLOBALS[parse_url($path,PHP_URL_HOST)];
$this->pos = 0;
if (!is_string($this->stream)) return false;
return true;
}
public function stream_read($count)
{
$p=&$this->pos;
$ret = substr($this->stream, $this->pos, $count);
$this->pos += strlen($ret);
return $ret;
}
public function stream_write($data)
{
$l=strlen($data);
$this->stream =
substr($this->stream, 0, $this->pos) .
$data .
substr($this->stream, $this->pos += $l);
return $l;
}
public function stream_tell()
{
return $this->pos;
}
public function stream_eof()
{
return $this->pos >= strlen($this->stream);
}
public function stream_seek($offset, $whence)
{
$l=strlen($this->stream);
switch ($whence)
{
case SEEK_SET: $newPos = $offset; break;
case SEEK_CUR: $newPos = $this->pos + $offset; break;
case SEEK_END: $newPos = $l + $offset; break;
default: return false;
}
$ret = ($newPos >=0 && $newPos <=$l);
if ($ret) $this->pos=$newPos;
return $ret;
}
}
stream_wrapper_register('global', 'global_stream_wrapper');