Initial import.

T0/TPointerXT.cs

@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining 
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be 
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+using System;
+using System.Collections.Generic;
+
+class TPointerXT : TPointerBase {
+
+	internal string Name {
+		get; private set;
+	}
+
+	internal Word Target {
+		get; private set;
+	}
+
+	internal TPointerXT(string name)
+	{
+		this.Name = name;
+		this.Target = null;
+	}
+
+	internal TPointerXT(Word target)
+	{
+		this.Name = target.Name;
+		this.Target = target;
+	}
+
+	internal void Resolve(T0Comp ctx)
+	{
+		if (Target == null) {
+			Target = ctx.Lookup(Name);
+		}
+	}
+
+	internal override void Execute(T0Comp ctx, CPU cpu)
+	{
+		Resolve(ctx);
+		Target.Run(cpu);
+	}
+
+	internal override string ToString(TValue vp)
+	{
+		return String.Format("<'{0}>", Name);
+	}
+
+	internal override bool Equals(TPointerBase tp)
+	{
+		TPointerXT tx = tp as TPointerXT;
+		return tx != null && Name == tx.Name;
+	}
+}