implement equals for PrimitiveNativeWrappers so that pointer comparisons between Python primitives work in sandboxed

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/DynamicObjectNativeWrapper.java

@@ -1177,7 +1177,7 @@ public boolean isMemberModifiable(String member) {
         }
     }
 
-    public static class PrimitiveNativeWrapper extends DynamicObjectNativeWrapper {
+    public static final class PrimitiveNativeWrapper extends DynamicObjectNativeWrapper {
 
         public static final byte PRIMITIVE_STATE_BOOL = 1 << 0;
         public static final byte PRIMITIVE_STATE_BYTE = 1 << 1;
@@ -1260,6 +1260,16 @@ public void setMaterializedObject(Object materializedPrimitive) {
             setDelegate(materializedPrimitive);
         }
 
+        @Override
+        public boolean equals(Object obj) {
+            return obj instanceof PrimitiveNativeWrapper && ((PrimitiveNativeWrapper)obj).state == state && ((PrimitiveNativeWrapper)obj).value == value && ((PrimitiveNativeWrapper)obj).dvalue == dvalue;
+        }
+
+        @Override
+        public int hashCode() {
+            return (int) (value ^ Double.doubleToRawLongBits(dvalue) ^ state);
+        }
+
         public static PrimitiveNativeWrapper createBool(boolean val) {
             return new PrimitiveNativeWrapper(PRIMITIVE_STATE_BOOL, PInt.intValue(val));
         }