From 730b0f5c5c39fabadc78ab1d1f9331d6256d1533 Mon Sep 17 00:00:00 2001
From: hung <ndgnuh@protonmail.com>
Date: Fri, 1 May 2020 15:17:14 +0700
Subject: [PATCH] gears.math: add the sign function

---
 lib/gears/math.lua | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/lib/gears/math.lua b/lib/gears/math.lua
index 61c19d004..db295f673 100644
--- a/lib/gears/math.lua
+++ b/lib/gears/math.lua
@@ -76,5 +76,19 @@ function gmath.round(x)
     return math.floor(x + 0.5)
 end
 
+--- Return the sign of the number x
+-- return 1 if x is positive, -1 if negative and 0 if x is 0
+-- @tparam number x
+-- @treturn integer
+-- @staticfct gears.math.sign
+function gmath.sign(x)
+    if x > 0 then
+        return 1
+    elseif x < 0 then
+        return -1
+    else
+        return 0
+    end
+end
 
 return gmath