mcs/tools/linker/Mono.Linker/Pipeline.cs

   1 //
   2 // Pipeline.cs
   3 //
   4 // Author:
   5 //   Jb Evain (jbevain@gmail.com)
   6 //
   7 // (C) 2006 Jb Evain
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections;
  31 using System.Diagnostics;
  32
  33 using Mono.Linker.Steps;
  34
  35 namespace Mono.Linker {
  36
  37         public class Pipeline {
  38
  39                 ArrayList _steps;
  40
  41                 public Pipeline ()
  42                 {
  43                         _steps = new ArrayList();
  44                 }
  45
  46                 public void PrependStep (IStep step)
  47                 {
  48                         _steps.Insert (0, step);
  49                 }
  50
  51                 public void AppendStep (IStep step)
  52                 {
  53                         _steps.Add (step);
  54                 }
  55
  56                 public void AddStepBefore (Type target, IStep step)
  57                 {
  58                         for (int i = 0; i < _steps.Count; i++) {
  59                                 if (target.IsInstanceOfType (_steps [i])) {
  60                                         _steps.Insert (i, step);
  61                                         return;
  62                                 }
  63                         }
  64                         string msg = String.Format ("Step {0} could not be inserted before (not found) {1}", step, target);
  65                         throw new InvalidOperationException (msg);
  66                 }
  67
  68                 public void ReplaceStep (Type target, IStep step)
  69                 {
  70                         AddStepBefore (target, step);
  71                         RemoveStep (target);
  72                 }
  73
  74                 public void AddStepAfter (Type target, IStep step)
  75                 {
  76                         for (int i = 0; i < _steps.Count; i++) {
  77                                 if (target.IsInstanceOfType (_steps [i])) {
  78                                         if (i == _steps.Count - 1)
  79                                                 _steps.Add (step);
  80                                         else
  81                                                 _steps.Insert (i + 1, step);
  82                                         return;
  83                                 }
  84                         }
  85                         string msg = String.Format ("Step {0} could not be inserted after (not found) {1}", step, target);
  86                         throw new InvalidOperationException (msg);
  87                 }
  88
  89                 public void AddStepAfter (IStep target, IStep step)
  90                 {
  91                         for (int i = 0; i < _steps.Count; i++) {
  92                                 if (_steps [i] == target) {
  93                                         if (i == _steps.Count - 1)
  94                                                 _steps.Add (step);
  95                                         else
  96                                                 _steps.Insert (i + 1, step);
  97                                         return;
  98                                 }
  99                         }
 100                 }
 101
 102                 public void RemoveStep (Type target)
 103                 {
 104                         for (int i = 0; i < _steps.Count; i++) {
 105                                 if (_steps [i].GetType () != target)
 106                                         continue;
 107
 108                                 _steps.RemoveAt (i);
 109                                 break;
 110                         }
 111                 }
 112
 113                 public void Process (LinkContext context)
 114                 {
 115                         while (_steps.Count > 0) {
 116                                 IStep step = (IStep) _steps [0];
 117                                 context.Annotations.Push (step);
 118                                 step.Process (context);
 119                                 context.Annotations.Pop ();
 120                                 _steps.Remove (step);
 121                         }
 122                 }
 123
 124                 public IStep [] GetSteps ()
 125                 {
 126                         return (IStep []) _steps.ToArray (typeof (IStep));
 127                 }
 128
 129                 public bool ContainsStep (Type type)
 130                 {
 131                         foreach (IStep step in _steps)
 132                                 if (step.GetType () == type)
 133                                         return true;
 134
 135                         return false;
 136                 }
 137         }
 138 }