1 /*
2 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 *
19 */
20
21 #include "config.h"
22 #include "PropertyNameArray.h"
23
24 #include "JSObject.h"
25 #include "ScopeChain.h"
26 #include "Structure.h"
27 #include "StructureChain.h"
28
29 namespace JSC {
30
31 static const size_t setThreshold = 20;
32
add(StringImpl * identifier)33 void PropertyNameArray::add(StringImpl* identifier)
34 {
35 ASSERT(!identifier || identifier == StringImpl::empty() || identifier->isIdentifier());
36
37 size_t size = m_data->propertyNameVector().size();
38 if (size < setThreshold) {
39 for (size_t i = 0; i < size; ++i) {
40 if (identifier == m_data->propertyNameVector()[i].impl())
41 return;
42 }
43 } else {
44 if (m_set.isEmpty()) {
45 for (size_t i = 0; i < size; ++i)
46 m_set.add(m_data->propertyNameVector()[i].impl());
47 }
48 if (!m_set.add(identifier).second)
49 return;
50 }
51
52 addKnownUnique(identifier);
53 }
54
55 } // namespace JSC
56