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NOBUG: Added a new function handling with the grades precission

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We should provide a common approach to float grade values so modules
will be consistent in grading algorithm. That is why I push it here.
Note that basically this complements grade_floats_different().
Used in Workshop 2.0.
This commit is contained in:
mudrd8mz 2009-09-08 21:45:44 +00:00
parent ee8aca2781
commit f162c15a5a
1 changed files with 15 additions and 2 deletions
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17
lib/gradelib.php
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@ -1285,7 +1285,7 @@ function grade_course_reset($courseid) {
}
/**
* Convert number to 5 decimalfloat, empty tring or null db compatible format
* Convert number to 5 decimalfloat, empty string or null db compatible format
* (we need this to decide if db value changed)
*
* @param mixed $number
@ -1313,4 +1313,17 @@ function grade_floats_different($f1, $f2) {
return (grade_floatval($f1) !== grade_floatval($f2));
}
?>
/**
* Compare two float numbers safely. Uses 5 decimals php precision.
*
* Do not use rounding for 10,5 at the database level as the results may be
* different from php round() function.
*
* @since 2.0
* @param float $f1
* @param float $f2
* @return bool true if the values should be considered as the same grades
*/
function grade_floats_equal($f1, $f2) {
return (grade_floatval($f1) === grade_floatval($f2));
}