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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 "Structure.h"
     25 #include "StructureChain.h"
     26 
     27 namespace JSC {
     28 
     29 static const size_t setThreshold = 20;
     30 
     31 void PropertyNameArray::add(UString::Rep* identifier)
     32 {
     33     ASSERT(identifier == &UString::Rep::empty() || identifier->isIdentifier());
     34 
     35     size_t size = m_data->propertyNameVector().size();
     36     if (size < setThreshold) {
     37         for (size_t i = 0; i < size; ++i) {
     38             if (identifier == m_data->propertyNameVector()[i].ustring().rep())
     39                 return;
     40         }
     41     } else {
     42         if (m_set.isEmpty()) {
     43             for (size_t i = 0; i < size; ++i)
     44                 m_set.add(m_data->propertyNameVector()[i].ustring().rep());
     45         }
     46         if (!m_set.add(identifier).second)
     47             return;
     48     }
     49 
     50     addKnownUnique(identifier);
     51 }
     52 
     53 } // namespace JSC
     54