mcs/class/System.ServiceModel/Mono.CodeGeneration/CodeEquals.cs

   1 //
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   3 // a copy of this software and associated documentation files (the
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   8 // the following conditions:
   9 //
  10 // The above copyright notice and this permission notice shall be
  11 // included in all copies or substantial portions of the Software.
  12 //
  13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  14 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  15 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  16 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  17 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  18 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  19 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20 //
  21 // Copyright (C) Lluis Sanchez Gual, 2004
  22 //
  23
  24 #if !MONOTOUCH
  25 using System;
  26 using System.Reflection;
  27 using System.Reflection.Emit;
  28
  29 namespace Mono.CodeGeneration
  30 {
  31         public class CodeEquals: CodeConditionExpression
  32         {
  33                 CodeExpression exp1;
  34                 CodeExpression exp2;
  35                 Type t1;
  36                 Type t2;
  37
  38                 public CodeEquals (CodeExpression exp1, CodeExpression exp2)
  39                 {
  40                         this.exp1 = exp1;
  41                         this.exp2 = exp2;
  42
  43                         t1 = exp1.GetResultType ();
  44                         t2 = exp2.GetResultType ();
  45
  46                         if (t1.IsValueType && t2.IsValueType) {
  47                                 if (t1 != t2)
  48                                         throw new InvalidOperationException ("Can't compare values of different primitive types");
  49                         }
  50                 }
  51
  52                 public override void Generate (ILGenerator gen)
  53                 {
  54                         if (t1.IsPrimitive)
  55                         {
  56                                 exp1.Generate (gen);
  57                                 exp2.Generate (gen);
  58                                 gen.Emit (OpCodes.Ceq);
  59                         }
  60                         else
  61                         {
  62                                 exp1.Generate (gen);
  63                                 exp2.Generate (gen);
  64 //                              gen.Emit (OpCodes.Ceq);
  65                                 gen.EmitCall (OpCodes.Callvirt, t1.GetMethod ("Equals", new Type[] {t2}), null);
  66                         }
  67                 }
  68
  69                 public override void GenerateForBranch (ILGenerator gen, Label label, bool branchCase)
  70                 {
  71                         if (t1.IsPrimitive)
  72                         {
  73                                 exp1.Generate (gen);
  74                                 exp2.Generate (gen);
  75                                 if (branchCase)
  76                                         gen.Emit (OpCodes.Beq, label);
  77                                 else
  78                                         gen.Emit (OpCodes.Bne_Un, label);
  79                         }
  80                         else {
  81                                 Generate (gen);
  82                                 if (branchCase)
  83                                         gen.Emit (OpCodes.Brtrue, label);
  84                                 else
  85                                         gen.Emit (OpCodes.Brfalse, label);
  86                         }
  87                 }
  88
  89                 public override void PrintCode (CodeWriter cp)
  90                 {
  91                         exp1.PrintCode (cp);
  92                         cp.Write (" == ");
  93                         exp2.PrintCode (cp);
  94                 }
  95
  96                 public override Type GetResultType ()
  97                 {
  98                         return typeof (bool);
  99                 }
 100         }
 101 }
 102 #endif