#20051 [Opn->Fbk]: stream_register_wrapper and stream_eof
| From: | wez@php.net | Date: | Wed, 23 Oct 2002 20:56:04 +0000 |
| Subject: | #20051 [Opn->Fbk]: stream_register_wrapper and stream_eof | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-23135@lists.php.net to get a copy of this message | ||
ID: 20051
Updated by: wez@php.net
Reported By: leon@leonatkinson.com
-Status: Open
+Status: Feedback
Bug Type: Reproducible crash
Operating System: Linux
PHP Version: 4.3.0-pre1
New Comment:
Please try using this CVS snapshot:
http://snaps.php.net/php4-latest.tar.gz
For Windows:
http://snaps.php.net/win32/php4-win32-latest.zip
Most probably fixed in the php4-latest snapshot.
Please try it and let us know how you get on.
(Very similar code to that example is used as part of the test suite).
Previous Comments:
------------------------------------------------------------------------
[2002-10-23 15:30:13] leon@leonatkinson.com
After fixing the missing semicolon in stream_register_wrapper's example
(in the docs and pasted below), I get infinite loops (and sometimes
crashes). It seems like this is coming from feof() having problems
gettting TRUE from stream_eof.
<? class VariableStream {
var $position;
var $varname;
function stream_open($path, $mode, $options, &$opened_path)
{
$url = parse_url($path);
$this->varname = $url["host"];
$this->position = 0;
return true;
}
function stream_read($count)
{
$ret = substr($GLOBALS[$this->varname], $this->position,
$count);
$this->position += strlen($ret);
return $ret;
}
function stream_write($data)
{
$left = substr($GLOBALS[$this->varname], 0, $this->position);
$right = substr($GLOBALS[$this->varname], $this->position +
strlen($data));
$GLOBALS[$this->varname] = $left . $data . $right;
$this->position += strlen($data);
return strlen($data);
}
function stream_tell()
{
return $this->position;
}
function stream_eof()
{
return $this->position >= strlen($GLOBALS[$this->varname]);
}
function stream_seek($offset, $whence)
{
switch($whence) {
case SEEK_SET:
if ($offset < strlen($GLOBALS[$this->varname]) &&
$offset >= 0) {
$this->position = $offset;
return true;
} else {
return false;
}
break;
case SEEK_CUR:
if ($offset >= 0) {
$this->position += $offset;
return true;
} else {
return false;
}
break;
case SEEK_END:
if (strlen($GLOBALS[$this->varname]) + $offset >= 0) {
$this->position = strlen($GLOBALS[$this->varname])
+ $offset;
return true;
} else {
return false;
}
break;
default:
return false;
}
}
}
stream_register_wrapper("var", "VariableStream")
or die("Failed to register protocol");
$myvar = "";
$fp = fopen("var://myvar", "r+");
fwrite($fp, "line1\n");
fwrite($fp, "line2\n");
fwrite($fp, "line3\n");
rewind($fp);
while(!feof($fp)) {
echo fgets($fp);
}
fclose($fp);
var_dump($myvar);
?>
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=20051&edit=1