Added logger

GlitchLog/src/FileLogger.bf

@@ -0,0 +1,43 @@
+using System;
+using System.IO;
+using System.Text;
+
+namespace GlitchLog
+{
+	public class FileLogger : ILogger
+	{
+		StreamWriter _sw ~ delete _;
+
+		[AllowAppend]
+		public this(String fileName)
+		{
+			var sw = append StreamWriter();
+			_sw = sw;
+			_sw.Create(fileName);
+		}
+
+		public void Trace(StringView format, params Object[] args)
+		{
+			_sw.Write("TRACE: ");
+			_sw.WriteLine(format, params args);
+		}
+
+		public void Info(StringView format, params Object[] args)
+		{
+			_sw.Write("INFO: ");
+			_sw.WriteLine(format, params args);
+		}
+
+		public void Warning(StringView format, params Object[] args)
+		{
+			_sw.Write("WARNING: ");
+			_sw.WriteLine(format, params args);
+		}
+
+		public void Error(StringView format, params Object[] args)
+		{
+			_sw.Write("ERROR: ");
+			_sw.WriteLine(format, params args);
+		}
+	}
+}