From 1eeb90a09b4f5f0c43630839e8c80806b3213c41 Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Tue, 9 Oct 2018 20:43:13 +0900
Subject: [PATCH] [Modify] Add it

---
 websocket-sharp/Net/HttpUtility.cs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/websocket-sharp/Net/HttpUtility.cs b/websocket-sharp/Net/HttpUtility.cs
index 0317cc4d..920dbb4d 100644
--- a/websocket-sharp/Net/HttpUtility.cs
+++ b/websocket-sharp/Net/HttpUtility.cs
@@ -145,6 +145,22 @@ namespace WebSocketSharp.Net
                  : -1;
     }
 
+    private static int getNumber (string s, int offset, int count)
+    {
+      var ret = 0;
+
+      var end = offset + count - 1;
+      for (var i = offset; i <= end; i++) {
+        var num = getNumber (s[i]);
+        if (num == -1)
+          return -1;
+
+        ret = (ret << 4) + num;
+      }
+
+      return ret;
+    }
+
     private static string htmlEncode (string s, bool minimal)
     {
       var buff = new StringBuilder ();