From 5d605ce372c7f559f682eb8ab6b3316f251e8c7d Mon Sep 17 00:00:00 2001
From: Recep Aslantas <info@recp.me>
Date: Tue, 10 Jul 2018 10:54:31 +0300
Subject: [PATCH] avoid zero division for percent

* two value may be same, in this case now returns 1.
* to must be >= from and current <= to && current >= from
---
 include/cglm/util.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/cglm/util.h b/include/cglm/util.h
index d1929f2..34be9b9 100644
--- a/include/cglm/util.h
+++ b/include/cglm/util.h
@@ -185,7 +185,12 @@ glm_eq(float a, float b) {
 CGLM_INLINE
 float
 glm_percent(float from, float to, float current) {
-  return (current - from) / (to - from);
+  float t;
+
+  if ((t = to - from) == 0.0f)
+    return 1.0f;
+
+  return (current - from) / t;
 }
 
 /*!