Refactor Package -> MixFile; group filesystem related classes in FileFormats.

OpenRA.FileFormats/Filesystem/PackageWriter.cs

@@ -0,0 +1,48 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made 
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see LICENSE.
+ */
+#endregion
+
+using System.Collections.Generic;
+using System.IO;
+
+namespace OpenRA.FileFormats
+{
+	public static class PackageWriter
+	{
+		public static void CreateMix(string filename, List<string> contents)
+		{
+			// Construct a list of entries for the file header
+			uint dataSize = 0;
+			var items = new List<PackageEntry>();
+			foreach (var file in contents)
+			{
+				uint length = (uint)new FileInfo(file).Length;
+				uint hash = PackageEntry.HashFilename(Path.GetFileName(file));
+				items.Add(new PackageEntry(hash, dataSize, length));
+				dataSize += length;
+			}
+
+			using (var s = File.Create(filename))
+			using (var writer = new BinaryWriter(s))
+			{
+				// Write file header
+				writer.Write((ushort)items.Count);
+				writer.Write(dataSize);
+				foreach (var item in items)
+					item.Write(writer);
+
+				writer.Flush();
+
+				// Copy file data
+				foreach (var file in contents)
+					s.Write(File.ReadAllBytes(file));
+			}
+		}
+	}
+}