Bug #46781 [Com]: BC math handles minus zero incorrectly

Edit report at http://bugs.php.net/bug.php?id=46781&edit=1 ID: 46781 Comment by: testify4 at o2 dot pl Reported by: preechaw at gmail dot com Summary: BC math handles minus zero incorrectly Status: Bogus Type: Bug Package: BC math related Operating System: Windows XP PHP Version: 5.2.7 Block user comment: N Private report: N New Comment: jani@php.net, "expected result" that you got is obviously incorrect. I am using PHP 5.3.3 and this bug still exists. Please change the bug status. Thank you. Reproduce code: --------------- <?php bcscale(2); print bcadd('-0.0', '-0.0') . '<br>'; // prints: -0.00, should be: 0.00 print bccomp('-0.0', '0') . '<br>'; // prints: -1, should be: 0 ?> Previous Comments: ------------------------------------------------------------------------ [2009-01-21 20:01:07] jani@php.net I get the expected result with current release. (5.2.8) ------------------------------------------------------------------------ [2008-12-06 12:39:40] preechaw at gmail dot com Description: ------------ bcadd("-0.0", "-0.0", 1); // returns -0.0 bccomp("-0.0", "0", 1); // returns -1 I believe that the first expression should return '0.0', and the second one should return 0. The second expression implies that "-0.0" is mathematically less than "0", which is incorrect. -- I also submitted another bug related to minus zero. echo -0.1 * 0; // returns -0 -- Reproduce code: --------------- <?php echo bcadd("-0.0", "-0.0", 1) . "<br>\n"; // returns -0.0 echo bccomp("-0.0", "0", 1) . "<br>\n"; // returns -1 ?> Expected result: ---------------- -0.0 -1 Actual result: -------------- 0.0 0 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=46781&edit=1