From a5ddd2da81733d2ac4970a5cce7cae8de399fcb3 Mon Sep 17 00:00:00 2001
From: cridus <cridus.vero@gmail.com>
Date: Tue, 12 Jul 2022 16:33:30 +0200
Subject: [PATCH] Commit of a new class that got left behind...

---
 SteamP2PInfo/ReverseTextReader.cs | 60 +++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 SteamP2PInfo/ReverseTextReader.cs

diff --git a/SteamP2PInfo/ReverseTextReader.cs b/SteamP2PInfo/ReverseTextReader.cs
new file mode 100644
index 0000000..4475b8f
--- /dev/null
+++ b/SteamP2PInfo/ReverseTextReader.cs
@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.IO;
+
+namespace SteamP2PInfo
+{
+    public class ReverseTextReader
+    {
+        private const int LineFeedLf = 10;
+        private const int LineFeedCr = 13;
+        private readonly Stream _stream;
+        private readonly Encoding _encoding;
+
+        public bool EndOfStream => _stream.Position == 0;
+
+        public ReverseTextReader(Stream stream, Encoding encoding)
+        {
+            _stream = stream;
+            _encoding = encoding;
+            _stream.Position = _stream.Length;
+        }
+
+        public string ReadLine()
+        {
+            if (_stream.Position == 0) return null;
+
+            var line = new List<byte>();
+            var endOfLine = false;
+            while (!endOfLine)
+            {
+                var b = _stream.ReadByteFromBehind();
+
+                if (b == -1 || b == LineFeedLf)
+                {
+                    endOfLine = true;
+                }
+                line.Add(Convert.ToByte(b));
+            }
+
+            line.Reverse();
+            return _encoding.GetString(line.ToArray());
+        }
+    }
+
+    public static class StreamExtensions
+    {
+        public static int ReadByteFromBehind(this Stream stream)
+        {
+            if (stream.Position == 0) return -1;
+
+            stream.Position = stream.Position - 1;
+            var value = stream.ReadByte();
+            stream.Position = stream.Position - 1;
+            return value;
+        }
+    }
+}