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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