From e6181c24124d97f2fbc932b8a68311e625463156 Mon Sep 17 00:00:00 2001
From: uzvkl <dennis.kobert@student.kit.edu>
Date: Tue, 11 Jun 2019 23:05:52 +0200
Subject: Move dsa related stuff to subfolder

---
 dsa/FireBase/Streaming/NonBlockingStreamReader.cs | 63 +++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 dsa/FireBase/Streaming/NonBlockingStreamReader.cs

(limited to 'dsa/FireBase/Streaming/NonBlockingStreamReader.cs')

diff --git a/dsa/FireBase/Streaming/NonBlockingStreamReader.cs b/dsa/FireBase/Streaming/NonBlockingStreamReader.cs
new file mode 100644
index 0000000..8228e32
--- /dev/null
+++ b/dsa/FireBase/Streaming/NonBlockingStreamReader.cs
@@ -0,0 +1,63 @@
+using System.IO;
+using System.Text;
+
+namespace Firebase.Database.Streaming
+{
+    /// <summary>
+    ///     When a regular <see cref="StreamReader" /> is used in a UWP app its <see cref="StreamReader.ReadLine" /> method
+    ///     tends to take a long
+    ///     time for data larger then 2 KB. This extremly simple implementation of <see cref="TextReader" /> can be used
+    ///     instead to boost performance
+    ///     in your UWP app. Use <see cref="FirebaseOptions" /> to inject an instance of this class into your
+    ///     <see cref="FirebaseClient" />.
+    /// </summary>
+    public class NonBlockingStreamReader : TextReader
+    {
+        private const int DefaultBufferSize = 16000;
+        private readonly byte[] buffer;
+        private readonly int bufferSize;
+
+        private readonly Stream stream;
+
+        private string cachedData;
+
+        public NonBlockingStreamReader(Stream stream, int bufferSize = DefaultBufferSize)
+        {
+            this.stream = stream;
+            this.bufferSize = bufferSize;
+            buffer = new byte[bufferSize];
+
+            cachedData = string.Empty;
+        }
+
+        public override string ReadLine()
+        {
+            var currentString = TryGetNewLine();
+
+            while (currentString == null)
+            {
+                var read = stream.Read(buffer, 0, bufferSize);
+                var str = Encoding.UTF8.GetString(buffer, 0, read);
+
+                cachedData += str;
+                currentString = TryGetNewLine();
+            }
+
+            return currentString;
+        }
+
+        private string TryGetNewLine()
+        {
+            var newLine = cachedData.IndexOf('\n');
+
+            if (newLine >= 0)
+            {
+                var r = cachedData.Substring(0, newLine + 1);
+                cachedData = cachedData.Remove(0, r.Length);
+                return r.Trim();
+            }
+
+            return null;
+        }
+    }
+}
\ No newline at end of file
-- 
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