Imported Upstream version 5.0.0.42

Former-commit-id: fd56571888259555122d8a0f58c68838229cea2b

external/linker/tuner/Mono.Tuner/Extensions.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+
+using Mono.Cecil;
+
+using Mono.Linker;
+
+namespace Mono.Tuner {
+
+	public static partial class Extensions {
+
+		public static bool TryGetLinkedAssembly (this LinkContext context, string name, out AssemblyDefinition assembly)
+		{
+			assembly = GetAssembly (context, name);
+			if (assembly == null)
+				return false;
+
+			return context.Annotations.GetAction (assembly) == AssemblyAction.Link;
+		}
+
+		public static AssemblyDefinition GetAssembly (this LinkContext context, string assembly_name)
+		{
+			foreach (var assembly in context.GetAssemblies ())
+				if (assembly.Name.Name == assembly_name)
+					return assembly;
+
+			return null;
+		}
+
+		// note: direct check, no inheritance
+		public static bool Is (this TypeReference type, string @namespace, string name)
+		{
+			return ((type != null) && (type.Name == name) && (type.Namespace == @namespace));
+		}
+	}
+}