Tools/Castle.DynamicProxy2/Castle.DynamicProxy/Generators/Emitters/LdcOpCodesDictionary.cs

   1 // Copyright 2004-2007 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.DynamicProxy.Generators.Emitters
  16 {
  17         using System;
  18         using System.Collections;
  19         using System.Reflection.Emit;
  20
  21         /// <summary>
  22         /// Provides appropriate Ldc.X opcode for the type of primitive value to be loaded.
  23         /// </summary>
  24         public sealed class LdcOpCodesDictionary : DictionaryBase
  25         {
  26                 private static readonly LdcOpCodesDictionary _dict = new LdcOpCodesDictionary();
  27
  28                 private static readonly OpCode _emptyOpCode = new OpCode();
  29
  30                 private LdcOpCodesDictionary() : base()
  31                 {
  32                         Dictionary[typeof(bool)] = OpCodes.Ldc_I4;
  33                         Dictionary[typeof(char)] = OpCodes.Ldc_I4;
  34                         Dictionary[typeof(SByte)] = OpCodes.Ldc_I4;
  35                         Dictionary[typeof(Int16)] = OpCodes.Ldc_I4;
  36                         Dictionary[typeof(Int32)] = OpCodes.Ldc_I4;
  37                         Dictionary[typeof(Int64)] = OpCodes.Ldc_I8;
  38                         Dictionary[typeof(float)] = OpCodes.Ldc_R4;
  39                         Dictionary[typeof(double)] = OpCodes.Ldc_R8;
  40                         Dictionary[typeof(byte)] = OpCodes.Ldc_I4_0;
  41                         Dictionary[typeof(UInt16)] = OpCodes.Ldc_I4_0;
  42                         Dictionary[typeof(UInt32)] = OpCodes.Ldc_I4_0;
  43                         Dictionary[typeof(UInt64)] = OpCodes.Ldc_I4_0;
  44                 }
  45
  46                 public OpCode this[Type type]
  47                 {
  48                         get
  49                         {
  50                                 if (Dictionary.Contains(type))
  51                                 {
  52                                         return (OpCode) Dictionary[type];
  53                                 }
  54                                 return EmptyOpCode;
  55                         }
  56                 }
  57
  58                 public static LdcOpCodesDictionary Instance
  59                 {
  60                         get { return _dict; }
  61                 }
  62
  63                 public static OpCode EmptyOpCode
  64                 {
  65                         get { return _emptyOpCode; }
  66                 }
  67         }
  68 }