From a7e481619c260ed9fad0589f942f11c9861d2ed1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Wies=C5=82aw=20=C5=A0olt=C3=A9s?= <wieslaw.soltes@gmail.com>
Date: Thu, 6 Aug 2015 21:17:52 +0200
Subject: [PATCH] Check for invalid spiros input

---
 Spiro/Spiro.cs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Spiro/Spiro.cs b/Spiro/Spiro.cs
index 2cd3135..b71a873 100644
--- a/Spiro/Spiro.cs
+++ b/Spiro/Spiro.cs
@@ -173,7 +173,16 @@ namespace SpiroNet
             SpiroSegment[] s;
             int n;
 
-            for (n = 0; spiros[n].Type != SpiroPointType.End && spiros[n].Type != SpiroPointType.EndOpenContour; ++n) ;
+            n = 0;
+            while (true)
+            {
+                if (spiros[n].Type == SpiroPointType.End || spiros[n].Type == SpiroPointType.EndOpenContour)
+                    break;
+
+                // invalid input
+                if (n >= spiros.Length)
+                    return false;
+            }
 
             if (spiros[n].Type == SpiroPointType.EndOpenContour)
                 ++n;