add it::mod which returns modulo as a positive number

1 files changed, 8 insertions, 0 deletions

diff --git a/it.class b/it.class
index 9ade3a0..0ea9a2f 100644
--- a/it.class
+++ b/it.class
@@ -1061,4 +1061,12 @@ static function sort($array, $mode = "")
 	return $array;
 }
 
+/**
+ * returns $a modulo $n as a positive number between 0 and $n - 1
+ */
+static function mod($a, $n)
+{
+	return (($a % $n) + $n) % $n;
+}
+
 }