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 OpcodeJumpIfNot : OpcodeJump {
29  
30  	internal OpcodeJumpIfNot() : base()
31  	{
32  	}
33  
34  	internal OpcodeJumpIfNot(int disp) : base(disp)
35  	{
36  	}
37  
38  	internal override void Run(CPU cpu)
39  	{
40  		TValue v = cpu.Pop();
41  		if (!v.Bool) {
42  			base.Run(cpu);
43  		}
44  	}
45  
46  	internal override int StackAction {
47  		get {
48  			return -1;
49  		}
50  	}
51  
52  	internal override CodeElement ToCodeElement()
53  	{
54  		return new CodeElementJump(6);
55  	}
56  
57  	public override string ToString()
58  	{
59  		if (JumpDisp == Int32.MinValue) {
60  			return "jumpifnot UNRESOLVED";
61  		} else {
62  			return "jumpifnot disp=" + JumpDisp;
63  		}
64  	}
65  }