bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/java/HashCodeFunction.java

   1 package org.simantics.scl.compiler.elaboration.java;
   2
   3 import org.cojen.classfile.TypeDesc;
   4 import org.simantics.scl.compiler.constants.FunctionValue;
   5 import org.simantics.scl.compiler.internal.codegen.references.Val;
   6 import org.simantics.scl.compiler.internal.codegen.utils.Constants;
   7 import org.simantics.scl.compiler.internal.codegen.utils.MethodBuilder;
   8 import org.simantics.scl.compiler.types.TVar;
   9 import org.simantics.scl.compiler.types.Type;
  10 import org.simantics.scl.compiler.types.Types;
  11 import org.simantics.scl.compiler.types.kinds.Kinds;
  12
  13 public class HashCodeFunction extends FunctionValue {
  14     private static final TVar A = Types.var(Kinds.STAR);
  15     public static final HashCodeFunction INSTANCE = new HashCodeFunction();
  16
  17     private HashCodeFunction() {
  18         super(new TVar[] {A}, Types.NO_EFFECTS, Types.INTEGER, A);
  19     }
  20
  21     @Override
  22     public Type applyExact(MethodBuilder mb, Val[] parameters) {
  23         TypeDesc parameterType = mb.getJavaTypeTranslator().getTypeDesc(parameters[0]);
  24         parameters[0].push(mb);
  25         switch(parameterType.getTypeCode()) {
  26         case TypeDesc.VOID_CODE:
  27             mb.loadStaticField(Constants.TUPLE0, "INSTANCE", Constants.TUPLE0);
  28             mb.invokeVirtual("java/lang/Object", "hashCode", TypeDesc.INT, Constants.OBJECTS[1]);
  29             break;
  30         case TypeDesc.OBJECT_CODE:
  31             mb.invokeStatic("java/util/Objects", "hashCode", TypeDesc.INT, Constants.OBJECTS[1]);
  32             break;
  33         case TypeDesc.INT_CODE:
  34             mb.invokeStatic("java/lang/Integer", "hashCode", TypeDesc.INT, new TypeDesc[] {TypeDesc.INT});
  35             break;
  36         case TypeDesc.LONG_CODE:
  37             mb.invokeStatic("java/lang/Long", "hashCode", TypeDesc.LONG, new TypeDesc[] {TypeDesc.LONG});
  38             break;
  39         case TypeDesc.DOUBLE_CODE:
  40             mb.invokeStatic("java/lang/Double", "hashCode", TypeDesc.DOUBLE, new TypeDesc[] {TypeDesc.DOUBLE});
  41             break;
  42         case TypeDesc.FLOAT_CODE:
  43             mb.invokeStatic("java/lang/Float", "hashCode", TypeDesc.FLOAT, new TypeDesc[] {TypeDesc.FLOAT});
  44             break;
  45         case TypeDesc.SHORT_CODE:
  46             mb.invokeStatic("java/lang/Short", "hashCode", TypeDesc.SHORT, new TypeDesc[] {TypeDesc.SHORT});
  47             break;
  48         }
  49         return Types.INTEGER;
  50     }
  51 }