mcs/ilasm/codegen/SwitchInstr.cs

   1 //
   2 // Mono.ILASM.SwitchInstr
   3 //
   4 // Author(s):
   5 //  Jackson Harper (Jackson@LatitudeGeo.com)
   6 //
   7 // (C) 2003 Jackson Harper, All rights reserved
   8 //
   9
  10
  11 using System;
  12 using System.Collections;
  13
  14 namespace Mono.ILASM {
  15
  16         public class SwitchInstr : IInstr {
  17
  18                 private ArrayList label_list;
  19
  20                 public SwitchInstr (ArrayList label_list, Location loc)
  21                         : base (loc)
  22                 {
  23                         this.label_list = label_list;
  24                 }
  25
  26                 public override void Emit (CodeGen code_gen, MethodDef meth,
  27                                            PEAPI.CILInstructions cil)
  28                 {
  29                         int count = 0;
  30                         PEAPI.CILLabel[] label_array;
  31
  32                         if (label_list != null) {
  33                                 label_array = new PEAPI.CILLabel[label_list.Count];
  34                                 foreach (object lab in label_list) {
  35                                         if (lab is LabelInfo) {
  36                                                 label_array[count++] = ((LabelInfo)lab).Label;
  37                                         } else {
  38                                                 throw new InternalErrorException ("offsets in switch statements.");
  39                                         }
  40                                 }
  41                         } else {
  42                                 label_array = new PEAPI.CILLabel [0];
  43                         }
  44
  45                         cil.Switch (label_array);
  46                 }
  47         }
  48
  49 }
  50