Store i18n meta data in hidden symbols instead of js accessible properties

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 13881 matching lines @@
             NONE));
     output->set(i, *result);
   }
 
   Handle<JSArray> result = isolate->factory()->NewJSArrayWithElements(output);
   result->set_length(Smi::FromInt(length));
   return *result;
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_IsInitializedIntlObject) {
+  HandleScope scope(isolate);
+
+  ASSERT(args.length() == 1);
+
+  CONVERT_ARG_HANDLE_CHECKED(Object, input, 0);
+
+  if (!input->IsJSObject()) return isolate->heap()->ToBoolean(false);
+  Handle<JSObject> obj = Handle<JSObject>::cast(input);
+
+  Handle<String> marker = isolate->factory()->intl_initialized_marker_string();
+  Handle<Object> tag(obj->GetHiddenProperty(*marker), isolate);
+  return isolate->heap()->ToBoolean(!tag->IsTheHole());
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_IsInitializedIntlObjectOfType) {
+  HandleScope scope(isolate);
+
+  ASSERT(args.length() == 2);
+
+  CONVERT_ARG_HANDLE_CHECKED(Object, input, 0);
+  CONVERT_ARG_HANDLE_CHECKED(String, expected_type, 1);
+
+  if (!input->IsJSObject()) return isolate->heap()->ToBoolean(false);
+  Handle<JSObject> obj = Handle<JSObject>::cast(input);
+
+  Handle<String> marker = isolate->factory()->intl_initialized_marker_string();
+  Handle<Object> tag(obj->GetHiddenProperty(*marker), isolate);
+  return isolate->heap()->ToBoolean(
+      tag->IsString() && String::cast(*tag)->Equals(*expected_type));
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_MarkAsInitializedIntlObjectOfType) {
+  HandleScope scope(isolate);
+
+  ASSERT(args.length() == 3);
+
+  CONVERT_ARG_HANDLE_CHECKED(JSObject, input, 0);
+  CONVERT_ARG_HANDLE_CHECKED(String, type, 1);
+  CONVERT_ARG_HANDLE_CHECKED(JSObject, impl, 2);
+
+  Handle<String> marker = isolate->factory()->intl_initialized_marker_string();
+  JSObject::SetHiddenProperty(input, marker, type);
+
+  marker = isolate->factory()->intl_impl_object_string();
+  JSObject::SetHiddenProperty(input, marker, impl);
+
+  return isolate->heap()->undefined_value();
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_GetImplFromInitializedIntlObject) {
+  HandleScope scope(isolate);
+
+  ASSERT(args.length() == 1);
+
+  CONVERT_ARG_HANDLE_CHECKED(Object, input, 0);
+
+  if (!input->IsJSObject()) {
+    Vector< Handle<Object> > arguments = HandleVector(&input, 1);
+    Handle<Object> type_error =
+        isolate->factory()->NewTypeError("not_intl_object", arguments);
+    return isolate->Throw(*type_error);
+  }
+
+  Handle<JSObject> obj = Handle<JSObject>::cast(input);
+
+  Handle<String> marker = isolate->factory()->intl_impl_object_string();
+  Handle<Object> impl(obj->GetHiddenProperty(*marker), isolate);
+  if (impl->IsTheHole()) {
+    Vector< Handle<Object> > arguments = HandleVector(&obj, 1);
+    Handle<Object> type_error =
+        isolate->factory()->NewTypeError("not_intl_object", arguments);
+    return isolate->Throw(*type_error);
+  }
+  return *impl;
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_CreateDateTimeFormat) {
   HandleScope scope(isolate);
 
   ASSERT(args.length() == 3);
 
   CONVERT_ARG_HANDLE_CHECKED(String, locale, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSObject, options, 1);
   CONVERT_ARG_HANDLE_CHECKED(JSObject, resolved, 2);
 
   Handle<ObjectTemplateInfo> date_format_template =
@@ skipping 1238 matching lines @@
   }
 }
 
 
 void Runtime::OutOfMemory() {
   Heap::FatalProcessOutOfMemory("CALL_AND_RETRY_LAST", true);
   UNREACHABLE();
 }
 
 } }  // namespace v8::internal