Imported Upstream version 5.0.0.42

Former-commit-id: fd56571888259555122d8a0f58c68838229cea2b

external/linker/cecil/Mono.Cecil/DefaultAssemblyResolver.cs

@@ -0,0 +1,66 @@
+//
+// Author:
+//   Jb Evain (jbevain@gmail.com)
+//
+// Copyright (c) 2008 - 2015 Jb Evain
+// Copyright (c) 2008 - 2011 Novell, Inc.
+//
+// Licensed under the MIT/X11 license.
+//
+
+#if !PCL && !NET_CORE
+
+using System;
+using System.Collections.Generic;
+
+namespace Mono.Cecil {
+
+	public class DefaultAssemblyResolver : BaseAssemblyResolver {
+
+		readonly IDictionary<string, AssemblyDefinition> cache;
+
+		public DefaultAssemblyResolver ()
+		{
+			cache = new Dictionary<string, AssemblyDefinition> (StringComparer.Ordinal);
+		}
+
+		public override AssemblyDefinition Resolve (AssemblyNameReference name)
+		{
+			if (name == null)
+				throw new ArgumentNullException ("name");
+
+			AssemblyDefinition assembly;
+			if (cache.TryGetValue (name.FullName, out assembly))
+				return assembly;
+
+			assembly = base.Resolve (name);
+			cache [name.FullName] = assembly;
+
+			return assembly;
+		}
+
+		protected void RegisterAssembly (AssemblyDefinition assembly)
+		{
+			if (assembly == null)
+				throw new ArgumentNullException ("assembly");
+
+			var name = assembly.Name.FullName;
+			if (cache.ContainsKey (name))
+				return;
+
+			cache [name] = assembly;
+		}
+
+		protected override void Dispose (bool disposing)
+		{
+			foreach (var assembly in cache.Values)
+				assembly.Dispose ();
+
+			cache.Clear ();
+
+			base.Dispose (disposing);
+		}
+	}
+}
+
+#endif