From 37650db1e15a83a1a63def5f1052e9612ffe8009 Mon Sep 17 00:00:00 2001
From: Andreas Mueller <webmaster@am-wd.de>
Date: Fri, 17 Dec 2021 22:27:52 +0100
Subject: [PATCH] StreamExtension, um Zeilenweise zu lesen

---
 AMWD.Common/Extensions/StreamExtensions.cs | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 AMWD.Common/Extensions/StreamExtensions.cs

diff --git a/AMWD.Common/Extensions/StreamExtensions.cs b/AMWD.Common/Extensions/StreamExtensions.cs
new file mode 100644
index 0000000..a83d825
--- /dev/null
+++ b/AMWD.Common/Extensions/StreamExtensions.cs
@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace AMWD.Common.Extensions
+{
+	public static class StreamExtensions
+	{
+		public static string ReadLine(this Stream stream, Encoding encoding = null, string eol = null)
+		{
+			if (encoding == null)
+				encoding = Encoding.Default;
+
+			if (eol == null)
+				eol = Environment.NewLine;
+
+			if (!stream.CanRead)
+				return null;
+
+			var bytes = new List<byte>();
+			string s;
+			do
+			{
+				int result = stream.ReadByte();
+				if (result == -1)
+					break;
+
+				byte b = (byte)result;
+				bytes.Add(b);
+				s = encoding.GetString(new[] { b });
+			}
+			while (!eol.Contains(s));
+
+			return encoding.GetString(bytes.ToArray()).Trim();
+		}
+
+		public static async Task<string> ReadLineAsync(this Stream stream, Encoding encoding = null, string eol = null, CancellationToken cancellationToken = default)
+		{
+			if (encoding == null)
+				encoding = Encoding.Default;
+
+			if (eol == null)
+				eol = Environment.NewLine;
+
+			if (!stream.CanRead)
+				return null;
+
+			var bytes = new List<byte>();
+			string s;
+			do
+			{
+				byte[] buffer = new byte[1];
+				int count = await stream.ReadAsync(buffer, 0, buffer.Length);
+				if (count == 0)
+					break;
+
+				bytes.Add(buffer[0]);
+				s = encoding.GetString(buffer);
+			}
+			while (!eol.Contains(s));
+
+			return encoding.GetString(bytes.ToArray()).Trim();
+		}
+	}
+}