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"global stream wrapper (makes variables available as streams) is now mbstring.func_overload save"

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This commit is contained in:
Ralf Becker 2008-10-01 10:06:49 +00:00
parent e76f20f665
commit 396b1212ad
1 changed files with 56 additions and 12 deletions
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68
phpgwapi/inc/class.global_stream_wrapper.inc.php
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@ -1,6 +1,6 @@
<?php
/**
* eGroupWare API: VFS - stream wrapper interface
* eGroupWare API: VFS - stream wrapper for global variables
*
* @link http://www.egroupware.org
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
@ -10,12 +10,14 @@
*/
/**
* eGroupWare API: stream wrapper for global variables,
* eGroupWare API: stream wrapper for global variables. It makes variables available as streams.
*
* Original from an expample on php.net:
* @see http://de.php.net/manual/en/function.stream-wrapper-register.php
*
* Use as global://varname
* Use as global://varname (please note global://host/varname does NOT work, as parse_url() would return with a leading slash!)
*
* Streamwrapper is now mbstring.func_overload save.
*
* @todo: allow to use path to access arrays: global://varname/key1/key2 to access $string from $GLOBALS['varname'] = array('key1'=>array('key2'=>$string));
*/
@ -34,19 +36,19 @@ class global_stream_wrapper
public function stream_read($count)
{
$p=&$this->pos;
$ret = substr($this->stream, $this->pos, $count);
$this->pos += strlen($ret);
$ret = self::_cut_bytes($this->stream, $this->pos, $count);
//error_log(__METHOD__."($count) this->pos=$this->pos, self::_bytes(this->stream)=".self::_bytes($this->stream)." self::_bytes(ret)=".self::_bytes($ret));
$this->pos += self::_bytes($ret);
return $ret;
}
public function stream_write($data)
{
$l=strlen($data);
$l=self::_bytes($data);
$this->stream =
substr($this->stream, 0, $this->pos) .
self::_cut_bytes($this->stream, 0, $this->pos) .
$data .
substr($this->stream, $this->pos += $l);
self::_cut_bytes($this->stream, $this->pos += $l);
return $l;
}
@ -57,12 +59,12 @@ class global_stream_wrapper
public function stream_eof()
{
return $this->pos >= strlen($this->stream);
return $this->pos >= self::_bytes($this->stream);
}
public function stream_seek($offset, $whence)
{
$l=strlen($this->stream);
$l=self::_bytes($this->stream);
switch ($whence)
{
case SEEK_SET: $newPos = $offset; break;
@ -74,5 +76,47 @@ class global_stream_wrapper
if ($ret) $this->pos=$newPos;
return $ret;
}
/**
* are the string functions overloaded by their mbstring variants
*
* @var boolean
*/
private static $mbstring_func_overload;
/**
* mbstring.func_overload safe strlen
*
* @param string &$data
* @return int
*/
private static function _bytes(&$data)
{
return self::$mbstring_func_overload ? mb_strlen($data,'ascii') : strlen($data);
}
/**
* mbstring.func_overload safe substr
*
* @param string &$data
* @param int $offset
* @param int $len
* @return string
*/
private static function _cut_bytes(&$data,$offset,$len=null)
{
return self::$mbstring_func_overload ? mb_substr($data,$offset,$len,'ascii') : substr($data,$offset,$len);
}
/**
* Init the (static parts) of the stream-wrapper
*
*/
public static function init()
{
self::$mbstring_func_overload = @extension_loaded('mbstring') && (ini_get('mbstring.func_overload') & 2);
stream_wrapper_register('global', 'global_stream_wrapper');
}
}
stream_wrapper_register('global', 'global_stream_wrapper');
global_stream_wrapper::init();