Line data Source code
1 : // Copyright 2017 the V8 project authors. All rights reserved.
2 : // Use of this source code is governed by a BSD-style license that can be
3 : // found in the LICENSE file.
4 :
5 : #include "src/objects/literal-objects.h"
6 :
7 : #include "src/factory.h"
8 : #include "src/isolate.h"
9 : #include "src/objects-inl.h"
10 :
11 : namespace v8 {
12 : namespace internal {
13 :
14 2817142 : Object* BoilerplateDescription::name(int index) const {
15 : // get() already checks for out of bounds access, but we do not want to allow
16 : // access to the last element, if it is the number of properties.
17 : DCHECK_NE(size(), index);
18 5634284 : return get(2 * index);
19 : }
20 :
21 2817142 : Object* BoilerplateDescription::value(int index) const {
22 5634284 : return get(2 * index + 1);
23 : }
24 :
25 880827 : int BoilerplateDescription::size() const {
26 : DCHECK_EQ(0, (length() - (this->has_number_of_properties() ? 1 : 0)) % 2);
27 : // Rounding is intended.
28 1706711 : return length() / 2;
29 : }
30 :
31 831886 : int BoilerplateDescription::backing_store_size() const {
32 831886 : if (has_number_of_properties()) {
33 : // If present, the last entry contains the number of properties.
34 12004 : return Smi::cast(this->get(length() - 1))->value();
35 : }
36 : // If the number is not given explicitly, we assume there are no
37 : // properties with computed names.
38 825884 : return size();
39 : }
40 :
41 3343 : void BoilerplateDescription::set_backing_store_size(Isolate* isolate,
42 : int backing_store_size) {
43 : DCHECK(has_number_of_properties());
44 : DCHECK_NE(size(), backing_store_size);
45 : Handle<Object> backing_store_size_obj =
46 3343 : isolate->factory()->NewNumberFromInt(backing_store_size);
47 3343 : set(length() - 1, *backing_store_size_obj);
48 3343 : }
49 :
50 0 : bool BoilerplateDescription::has_number_of_properties() const {
51 831886 : return length() % 2 != 0;
52 : }
53 :
54 : } // namespace internal
55 : } // namespace v8
|