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ID Category Severity Reproducibility Date Submitted Last Update
0002543 [Quercus] major always 03-20-08 18:50 03-21-08 13:19
Reporter ckchris View Status public  
Assigned To nam
Priority normal Resolution fixed Platform
Status closed   OS
Projection none   OS Version
ETA none Fixed in Version 3.1.6 Product Version 3.1.5
  Product Build
Summary 0002543: Assignment not working properly?
Description This is a direct copy of a function code from phpbb3's includes/functions_content.php, part of the class bitfield:

        function set($n)
        {
                $byte = $n >> 3;
                $bit = 7 - ($n & 7);

                if (strlen($this->data) >= $byte + 1)
                {
resin_debug("bit val: " . ord(chr(96) | chr(1)));
$vall = $this->data[$byte] | chr(1 << $bit);
resin_debug("ord: " . ord($vall));
                        //$this->data[$byte] = $this->data[$byte] | chr(1 << $bit);
                        $this->data[$byte] = $vall;
resin_debug(ord($this->data[$byte]));
                }
                else
                {
                        $this->data .= str_repeat("\0", $byte - strlen($this->data));
                        $this->data .= chr(1 << $bit);
                }
        }

I have sprinkled some resin debug statements for testing.

Input values are: 1, 2, 7

Output of debugging is:

[2008/03/20 19:41:02.899] INFO [com.caucho.quercus.lib.MiscModule] bit val: 97
[2008/03/20 19:41:02.900] INFO [com.caucho.quercus.lib.MiscModule] ord: 96
[2008/03/20 19:41:02.901] INFO [com.caucho.quercus.lib.MiscModule] 64
[2008/03/20 19:41:02.901] INFO [com.caucho.quercus.lib.MiscModule] bit val: 97
[2008/03/20 19:41:02.902] INFO [com.caucho.quercus.lib.MiscModule] ord: 65
[2008/03/20 19:41:02.903] INFO [com.caucho.quercus.lib.MiscModule] 64
[2008/03/20 19:41:02.899] INFO [com.caucho.quercus.lib.MiscModule] bit val: 97
[2008/03/20 19:41:02.900] INFO [com.caucho.quercus.lib.MiscModule] ord: 96
[2008/03/20 19:41:02.900] INFO [com.caucho.quercus.lib.MiscModule] 64
[2008/03/20 19:41:02.901] INFO [com.caucho.quercus.lib.MiscModule] bit val: 97
[2008/03/20 19:41:02.902] INFO [com.caucho.quercus.lib.MiscModule] ord: 65
[2008/03/20 19:41:02.903] INFO [com.caucho.quercus.lib.MiscModule] 64

So here's the strange thing. the output of the second statement with "ord: 65" shows the correct value.

Yet, when $vall is assigned to $this->data[$byte], the value changed.

Is there an assignment problem here?
Steps To Reproduce
Additional Information
Attached Files

- Relationships

- Notes
(0002869)
ckchris
03-20-08 19:17

 I am not sure but I narrowed it down to the following problem with the expressions:

With the above code, somehow reaching into the array data does not let me change/modify the character at the index. I changed the index to 0

$this->data[0] = "a"; <====== doesn't change $this->data at all
$this->data = "a"; <======== changes the data no problem
 
(0002870)
ckchris
03-20-08 19:32

 I figured out the problem. It appears that once a string is created, I am unable to change a character using the array-index approach. Under PHP, I am allowed to modify the string using array indexes.

$blah = "llllll";
$blah[0] = "a";
resin_debug($blah); <==== still prints "llllll"
 
(0002872)
ckchris
03-20-08 20:00

 I am currently running the latest snapshot of quercus, date today, March 20, 2008. Checked out of the SVN about 6 hours ago from the posting of this comment I am writing right now.
 
(0002874)
nam
03-21-08 13:19

 php/03m[b-d]
php/04a[0-2]
php/0i2[4-5]
php/0j2[4-5]
 

- Issue History
Date Modified Username Field Change
03-20-08 18:50 ckchris New Issue
03-20-08 18:50 ckchris Issue Monitored: ckchris
03-20-08 19:17 ckchris Note Added: 0002869
03-20-08 19:32 ckchris Note Added: 0002870
03-20-08 19:45 nam Status new => assigned
03-20-08 19:45 nam Assigned To  => nam
03-20-08 20:00 ckchris Note Added: 0002872
03-21-08 13:19 nam Status assigned => closed
03-21-08 13:19 nam Note Added: 0002874
03-21-08 13:19 nam Resolution open => fixed
03-21-08 13:19 nam Fixed in Version  => 3.1.6

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