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Bug #53102 the number 928 incorrectly packs (loses a bit)
Submitted: 2010-10-19 14:21 UTC Modified: 2010-10-19 15:37 UTC
From: sharpg8867 at gmail dot com Assigned:
Status: Not a bug Package: *General Issues
PHP Version: 5.2.14 OS:
Private report: No CVE-ID: None
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From: sharpg8867 at gmail dot com
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 [2010-10-19 14:21 UTC] sharpg8867 at gmail dot com
a) packing the value 928 (0x3A0) and 927 (0x39F) as unsigned long ("N") always converts to 927 (0x39F)
b) masking the lower 8 bits of 0x3A0 always reads as 0x3F or 159

Note: phpinfo reports PHP Version 5.2.13

Test script:
$value = 928;
pack("N",$value) is 0x39f (927)

$value = 927;
pack("N",$value) is 0x39f (927)

$value = 928;
$v0 = $value & 0xff;
$v0 prints as 927

Expected result:
928 packs as 928.

Actual result:
928 packs as 927

Not good for computer to lose bits.


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 [2010-10-19 15:26 UTC]
Why is this PHP-GTK related?
 [2010-10-19 15:33 UTC]
Also, you should provide a test script that people can *actually* run, not leaving us to infer the steps you took to produce the issue.
 [2010-10-19 15:36 UTC]
-Status: Open +Status: Bogus
 [2010-10-19 15:36 UTC]
Can't reproduce in PHP 5.2.14.

We only support the latest versions.
 [2010-10-19 15:37 UTC]
-Package: PHP-GTK related +Package: *General Issues
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