class/Mono.Cecil/Mono.Cecil.Cil/SymbolStoreHelper.cs

   1 //
   2 // SymbolStoreHelper.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 namespace Mono.Cecil.Cil {
  30
  31         using System;
  32         using SR = System.Reflection;
  33
  34         sealed class SymbolStoreHelper {
  35
  36                 static ISymbolStoreFactory s_factory;
  37
  38                 SymbolStoreHelper ()
  39                 {
  40                 }
  41
  42                 public static ISymbolReader GetReader (ModuleDefinition module)
  43                 {
  44                         InitFactory ();
  45
  46                         return s_factory.CreateReader (module, module.Image.FileInformation.FullName);
  47                 }
  48
  49                 public static ISymbolWriter GetWriter (ModuleDefinition module, string assemblyFileName)
  50                 {
  51                         InitFactory ();
  52
  53                         return s_factory.CreateWriter (module, assemblyFileName);
  54                 }
  55
  56                 static void InitFactory ()
  57                 {
  58                         if (s_factory != null)
  59                                 return;
  60
  61                         string assembly_name;
  62                         string type_name = GetSymbolSupportType (out assembly_name);
  63
  64                         Type factoryType = Type.GetType (type_name + ", " + assembly_name, false);
  65                         if (factoryType == null) {
  66                                 try {
  67                                         SR.Assembly assembly = SR.Assembly.LoadWithPartialName (assembly_name);
  68                                         factoryType = assembly.GetType (type_name);
  69                                 } catch {}
  70                         }
  71
  72                         if (factoryType == null)
  73                                 throw new NotSupportedException ();
  74
  75                         s_factory = (ISymbolStoreFactory) Activator.CreateInstance (factoryType);
  76                 }
  77
  78                 static string GetSymbolSupportType (out string assembly)
  79                 {
  80                         string kind = GetSymbolKind ();
  81                         assembly = "Mono.Cecil." + kind;
  82                         return string.Format (assembly + "." + kind + "Factory");
  83                 }
  84
  85                 static string GetSymbolKind ()
  86                 {
  87                         return OnMono () ? "Mdb" : "Pdb";
  88                 }
  89
  90                 static bool OnMono ()
  91                 {
  92                         return Type.GetType ("Mono.Runtime") != null;
  93                 }
  94         }
  95 }