From 978a88fbb4925400646cd9bcc0f0d966d213b8bb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zsolt=20Borb=C3=A9ly?=
 <zsborbely.u-szeged@partner.samsung.com>
Date: Thu, 4 Jun 2015 10:24:17 +0200
Subject: [PATCH] Implement Object.getPrototypeOf()
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

JerryScript-DCO-1.0-Signed-off-by: Zsolt Borbély zsborbely.u-szeged@partner.samsung.com
---
 .../builtin-objects/ecma-builtin-object.cpp   | 22 ++++++++-
 tests/jerry/object_getprototypeof.js          | 45 +++++++++++++++++++
 2 files changed, 65 insertions(+), 2 deletions(-)
 create mode 100644 tests/jerry/object_getprototypeof.js

diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-object.cpp b/jerry-core/ecma/builtin-objects/ecma-builtin-object.cpp
index eba3cf9df6..affe82fd1d 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-object.cpp
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-object.cpp
@@ -114,10 +114,28 @@ ecma_builtin_object_dispatch_construct (const ecma_value_t *arguments_list_p, /*
  *         Returned value must be freed with ecma_free_completion_value.
  */
 static ecma_completion_value_t
-ecma_builtin_object_object_get_prototype_of (ecma_value_t this_arg, /**< 'this' argument */
+ecma_builtin_object_object_get_prototype_of (ecma_value_t this_arg __attr_unused___, /**< 'this' argument */
                                              ecma_value_t arg) /**< routine's argument */
 {
-  ECMA_BUILTIN_CP_UNIMPLEMENTED (this_arg, arg);
+  ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();
+
+  /* 1. */
+  if (!ecma_is_value_object (arg))
+  {
+    ret_value = ecma_make_throw_obj_completion_value (ecma_new_standard_error (ECMA_ERROR_TYPE));
+  }
+  else
+  {
+    /* 2. */
+    ecma_object_t *obj_p = ecma_get_object_from_value (arg);
+
+    ecma_object_t *prototype_p = ecma_get_object_prototype (obj_p);
+    ecma_ref_object (prototype_p);
+
+    ret_value = ecma_make_normal_completion_value (ecma_make_object_value (prototype_p));
+  }
+
+  return ret_value;
 } /* ecma_builtin_object_object_get_prototype_of */
 
 /**
diff --git a/tests/jerry/object_getprototypeof.js b/tests/jerry/object_getprototypeof.js
new file mode 100644
index 0000000000..c36e0822c5
--- /dev/null
+++ b/tests/jerry/object_getprototypeof.js
@@ -0,0 +1,45 @@
+// Copyright 2015 Samsung Electronics Co., Ltd.
+// Copyright 2015 University of Szeged.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+try {
+  var v;
+  Object.getPrototypeOf(v);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+try {
+  Object.getPrototypeOf("foo");
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+try {
+  Object.getPrototypeOf(60);
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+var obj = { x : "foo" };
+assert (Object.getPrototypeOf(obj) === Object.prototype)
+
+var constructor = function () {};
+constructor.prototype = obj;
+
+var d_obj = new constructor();
+assert (Object.getPrototypeOf(d_obj) === obj);