#46781 [NEW]: BC math handles minus zero incorrectly

From: preechaw at gmail dot com Operating system: Windows XP PHP version: 5.2.7 PHP Bug Type: BC math related Bug description: BC math handles minus zero incorrectly 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 bug report at http://bugs.php.net/?id=46781&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=46781&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=46781&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=46781&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=46781&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=46781&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=46781&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=46781&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=46781&r=needscript Try newer version: http://bugs.php.net/fix.php?id=46781&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=46781&r=support Expected behavior: http://bugs.php.net/fix.php?id=46781&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=46781&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=46781&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=46781&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=46781&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=46781&r=dst IIS Stability: http://bugs.php.net/fix.php?id=46781&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=46781&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=46781&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=46781&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=46781&r=mysqlcfg