Implement TypedArray.of method (#3428)

The algorithm is based on ECMA-262 v6, 22.2.2.2

JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu

jerry-core/ecma/builtin-objects/typedarray/ecma-builtin-typedarray.c

@@ -13,6 +13,7 @@
  * limitations under the License.
  */
 
+#include "ecma-typedarray-object.h"
 #include "ecma-builtins.h"
 #include "ecma-exceptions.h"
 #include "ecma-gc.h"
@@ -127,13 +128,57 @@ ecma_builtin_typedarray_of (ecma_value_t this_arg, /**< 'this' argument */
                             const ecma_value_t *arguments_list_p, /**< arguments list */
                             ecma_length_t arguments_list_len) /**< number of arguments */
 {
-  JERRY_UNUSED (this_arg);
-  JERRY_UNUSED (arguments_list_p);
-  JERRY_UNUSED (arguments_list_len);
+  if (!ecma_is_constructor (this_arg))
+  {
+    return ecma_raise_type_error (ECMA_ERR_MSG ("'this' is not a constructor."));
+  }
 
-  /* TODO: implement 'of' */
+  ecma_object_t *obj_p = ecma_get_object_from_value (this_arg);
+  const uint8_t builtin_id = ecma_get_object_builtin_id (obj_p);
 
-  return ECMA_VALUE_UNDEFINED;
+  if (!ecma_typedarray_helper_is_typedarray (builtin_id))
+  {
+    return ecma_raise_type_error (ECMA_ERR_MSG ("'this' is not a typedarray constructor"));
+  }
+
+  ecma_typedarray_type_t typedarray_id = ecma_typedarray_helper_builtin_to_typedarray_id (builtin_id);
+
+  ecma_object_t *proto_p = ecma_builtin_get (ecma_typedarray_helper_get_prototype_id (typedarray_id));
+  const uint8_t element_size_shift = ecma_typedarray_helper_get_shift_size (typedarray_id);
+
+  ecma_value_t ret_val = ecma_typedarray_create_object_with_length (arguments_list_len,
+                                                                    proto_p,
+                                                                    element_size_shift,
+                                                                    typedarray_id);
+
+  if (ECMA_IS_VALUE_ERROR (ret_val))
+  {
+    return ret_val;
+  }
+
+  uint32_t k = 0;
+  ecma_object_t *ret_obj_p = ecma_get_object_from_value (ret_val);
+  ecma_typedarray_info_t info = ecma_typedarray_get_info (ret_obj_p);
+  ecma_typedarray_setter_fn_t setter_cb = ecma_get_typedarray_setter_fn (info.id);
+
+  while (k < arguments_list_len)
+  {
+    ecma_number_t num;
+    ecma_value_t next_val = ecma_get_number (arguments_list_p[k], &num);
+
+    if (ECMA_IS_VALUE_ERROR (next_val))
+    {
+      ecma_deref_object (ret_obj_p);
+      return next_val;
+    }
+
+    setter_cb (info.buffer_p, num);
+
+    k++;
+    info.buffer_p += info.element_size;
+  }
+
+  return ret_val;
 } /* ecma_builtin_typedarray_of */
 
 /**

tests/jerry/es2015/typedarray-of.js

@@ -0,0 +1,131 @@
+/* Copyright JS Foundation and other contributors, http://js.foundation
+ *
+ * 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.
+ */
+
+var int_typedarrays = [
+    Uint8ClampedArray,
+    Uint8Array,
+    Uint16Array,
+    Uint32Array,
+    Int8Array,
+    Int16Array,
+    Int32Array
+];
+
+var float_typedarrays = [
+    Float32Array,
+    Float64Array,
+];
+
+var obj = {
+    0: 0,
+    1: 1
+};
+
+int_typedarrays.forEach(function(e){
+    try {
+        e.of.call(undefined);
+        assert (false);
+    } catch (err) {
+        assert (err instanceof TypeError);
+    }
+
+    try {
+        e.of.call(obj);
+        assert (false);
+    } catch (err) {
+        assert (err instanceof TypeError);
+    }
+
+    // Test with regulat inputs
+    assert(e.of(1,2,3).toString() === "1,2,3");
+    assert(e.of(12,4,5,0).toString() === "12,4,5,0");
+    assert(e.of(23).toString() === "23");
+
+    // Test with string inputs
+    assert(e.of("12",4).toString() === "12,4");
+    assert(e.of(1,2,"foo").toString() === "1,2,0");
+
+    // Test with undefined
+    assert(e.of(undefined).toString() === "0");
+
+    // Test with object
+    assert(e.of(obj).toString() === "0");
+
+    // Test with NaN
+    assert(e.of(NaN).toString() === "0");
+});
+
+float_typedarrays.forEach(function(e){
+    try {
+        e.of.call(undefined);
+        assert (false);
+    } catch (err) {
+        assert (err instanceof TypeError);
+    }
+
+    try {
+        e.of.call(obj);
+        assert (false);
+    } catch (err) {
+        assert (err instanceof TypeError);
+    }
+
+    // Test with regulat inputs
+    assert(e.of(1,2,3).toString() === "1,2,3");
+    assert(e.of(12,4,5,0).toString() === "12,4,5,0");
+    assert(e.of(23).toString() === "23");
+
+    // Test with string inputs
+    assert(e.of("12",4).toString() === "12,4");
+    assert(e.of(1,2,"foo").toString() === "1,2,NaN");
+    assert(e.of("-12").toString() === "-12");
+
+    // Test with undefined
+    assert(e.of(undefined).toString() === "NaN");
+
+    // Test with object
+    assert(e.of(obj).toString() === "NaN");
+
+    // Test with NaN
+    assert(e.of(NaN).toString() === "NaN");
+});
+
+// Test with negative inputs
+var a = Uint8ClampedArray.of(-8);
+assert(a.toString() === "0");
+
+a = Uint8Array.of(-8);
+assert(a.toString() === "248");
+
+a = Uint16Array.of(-8);
+assert(a.toString() === "65528");
+
+a = Uint32Array.of(-8);
+assert(a.toString() === "4294967288");
+
+a = Int8Array.of(-8);
+assert(a.toString() === "-8");
+
+a = Int16Array.of(-8);
+assert(a.toString() === "-8");
+
+a = Int32Array.of(-8);
+assert(a.toString() === "-8");
+
+a = Float32Array.of(-8);
+assert(a.toString() === "-8");
+
+a = Float64Array.of(-8);
+assert(a.toString() === "-8");