_ Git - BearSSL/blob - T0/TPointerXT.cs

   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
  25 using System;
  26 using System.Collections.Generic;
  27
  28 class 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 }