add transform_object_properties in jerryx/arg (#1879)

Add a function in jerryx/arg. jerryx_arg_transform_object_properties, it will validate the properties of a JS object, and convert those properties into native type. JerryScript-DCO-1.0-Signed-off-by: Zidong Jiang zidong.jiang@intel.com
2017-06-19 19:51:08 -05:00
parent 7cc9d65c09
commit e4eecc2019
6 changed files with 424 additions and 15 deletions
@@ -81,8 +81,56 @@ jerryx_arg_transform_this_and_args (const jerry_value_t this_val, /**< the this_
  {
    jerry_release_value (ret);

-    return jerry_create_error (JERRY_ERROR_TYPE, (jerry_char_t *) "'this' validation failed");
+    return jerry_create_error (JERRY_ERROR_TYPE, (jerry_char_t *) "'this' validation failed.");
  }

  return jerryx_arg_transform_args (js_arg_p, js_arg_cnt, c_arg_p + 1, c_arg_cnt - 1);
 } /* jerryx_arg_transform_this_and_args */
+
+/**
+ * Validate the `obj_val`'s properties,
+ * and assign them to the native arguments.
+ *
+ * @return jerry undefined: all validators passed,
+ *         jerry error: a validator failed.
+ */
+jerry_value_t
+jerryx_arg_transform_object_properties (const jerry_value_t obj_val,/**< the JS object */
+                                        const jerry_char_t **name_p, /**< property name list of the JS object */
+                                        const jerry_length_t name_cnt, /**< count of the name list */
+                                        const jerryx_arg_t *c_arg_p, /**< points to the array of transformation steps */
+                                        jerry_length_t c_arg_cnt) /**< the count of the `c_arg_p` array */
+{
+  if (!jerry_value_is_object (obj_val))
+  {
+    return jerry_create_error (JERRY_ERROR_TYPE, (jerry_char_t *) "Not an object.");
+  }
+
+  jerry_value_t prop[name_cnt];
+
+  for (jerry_length_t i = 0; i < name_cnt; i++, name_p++)
+  {
+    const jerry_value_t name_str = jerry_create_string (*name_p);
+    prop[i] = jerry_get_property (obj_val, name_str);
+    jerry_release_value (name_str);
+
+    if (jerry_value_has_error_flag (prop[i]))
+    {
+      for (jerry_length_t j = 0; j < i; j++)
+      {
+        jerry_release_value (prop[j]);
+      }
+
+      return prop[i];
+    }
+  }
+
+  const jerry_value_t ret = jerryx_arg_transform_args (prop, name_cnt, c_arg_p, c_arg_cnt);
+
+  for (jerry_length_t i = 0; i < name_cnt; i++)
+  {
+    jerry_release_value (prop[i]);
+  }
+
+  return ret;
+} /* jerryx_arg_transform_object_properties */