added yaml library

thirdparty/yaml/WriteStream.cs

@@ -0,0 +1,121 @@
+//     ====================================================================================================
+//     YAML Parser for the .NET Framework
+//     ====================================================================================================
+//
+//     Copyright (c) 2006
+//         Christophe Lambrechts
+//         Jonathan Slenders
+//
+//     ====================================================================================================
+//     This file is part of the .NET YAML Parser.
+// 
+//     This .NET YAML parser is free software; you can redistribute it and/or modify
+//     it under the terms of the GNU Lesser General Public License as published by
+//     the Free Software Foundation; either version 2.1 of the License, or
+//     (at your option) any later version.
+// 
+//     The .NET YAML parser is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU Lesser General Public License for more details.
+// 
+//     You should have received a copy of the GNU Lesser General Public License
+//     along with Foobar; if not, write to the Free Software
+//     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USAusing System.Reflection;
+//     ====================================================================================================
+
+#define ENABLE_COMPRESSION
+
+using System;
+using System.Collections;
+
+using System.IO;
+
+namespace Yaml
+{
+	/// <summary>
+	///   Help class for writing a Yaml tree to a string
+	/// </summary>
+	public class WriteStream
+	{
+		private TextWriter stream;
+		private int        indentation       = 0;
+		private bool       lastcharisnewline = false;
+
+		private static string indentationChars = "    ";
+
+		/// <summary> Constructor </summary>
+		public WriteStream (TextWriter stream)
+		{
+			this.stream = stream;
+		}
+
+		/// <summary> Append a string </summary>
+		public void Append (string s)
+		{
+			// Just add the text to the output stream when
+			// there is no indentation
+			if (indentation == 0)
+				stream.Write (s);
+
+			// Otherwise process each individual char
+			else 
+				for (int i = 0; i < s.Length; i ++)
+				{
+					// Indent after a newline
+					if (lastcharisnewline)
+					{
+						WriteIndentation ();
+						lastcharisnewline = false;
+					}
+
+					// Add char
+					stream.Write (s [i]);
+
+					// Remember newlines
+					if (s [i] == '\n')
+						lastcharisnewline = true;
+				}
+		}
+
+		/// <summary> Indentation </summary>
+		public void Indent ()
+		{
+			// Increase indentation level
+			indentation ++;
+
+			// Add a newline
+#if ENABLE_COMPRESSION
+			lastcharisnewline = false;
+#else
+			stream.Write ("\n");
+			lastcharisnewline = true;
+#endif
+		}
+
+		/// <summary> Write the indentation to the output stream </summary>
+		private void WriteIndentation ()
+		{
+			for (int i = 0; i < indentation; i ++)
+				stream.Write (indentationChars);
+		}
+
+		/// <summary> Unindent </summary>
+		public void UnIndent ()
+		{
+			if (indentation > 0)
+			{
+				// Decrease indentation level
+				indentation --;
+
+				// Add a newline
+				if (! lastcharisnewline)
+					stream.Write ("\n");
+				lastcharisnewline = true;
+			}
+			else
+				throw new Exception ("Cannot unindent a not indented writestream.");
+
+		}
+	}
+}