1/*
2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25using System;
26using System.Collections.Generic;
27
28class TPointerXT : TPointerBase {
29
30	internal string Name {
31		get; private set;
32	}
33
34	internal Word Target {
35		get; private set;
36	}
37
38	internal TPointerXT(string name)
39	{
40		this.Name = name;
41		this.Target = null;
42	}
43
44	internal TPointerXT(Word target)
45	{
46		this.Name = target.Name;
47		this.Target = target;
48	}
49
50	internal void Resolve(T0Comp ctx)
51	{
52		if (Target == null) {
53			Target = ctx.Lookup(Name);
54		}
55	}
56
57	internal override void Execute(T0Comp ctx, CPU cpu)
58	{
59		Resolve(ctx);
60		Target.Run(cpu);
61	}
62
63	internal override string ToString(TValue vp)
64	{
65		return String.Format("<'{0}>", Name);
66	}
67
68	internal override bool Equals(TPointerBase tp)
69	{
70		TPointerXT tx = tp as TPointerXT;
71		return tx != null && Name == tx.Name;
72	}
73}
74