From 2a9a98e182d273563f98fd4a956f206ab409269c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gabriel=20V=C3=A1zquez=20=28Dagger=29?=
 <gavazquez@gmail.com>
Date: Fri, 19 Oct 2018 21:18:07 +0200
Subject: [PATCH] Protect against empty arrays

---
 CachedQuickLz/CachedQlzCommon.cs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CachedQuickLz/CachedQlzCommon.cs b/CachedQuickLz/CachedQlzCommon.cs
index 4f58d5a..7b8cc9e 100644
--- a/CachedQuickLz/CachedQlzCommon.cs
+++ b/CachedQuickLz/CachedQlzCommon.cs
@@ -38,6 +38,9 @@ public static int SizeCompressed(byte[] source)
         /// <returns>If the array is compressed with QuickLz or not</returns>
         public static bool IsCompressed(byte[] source, int length)
         {
+            if (source == null || source.Length < QlzConstants.QlzTrailLength || length < QlzConstants.QlzTrailLength)
+                return false;
+
             var trailEquals = true;
             for (var i = length - 1; i > length - QlzConstants.QlzTrailLength; i--)
             {