diff -r 000000000000 -r 4f2f89ce4247 JavaScriptCore/wtf/HashSet.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaScriptCore/wtf/HashSet.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,259 @@
+/*
+ * Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef WTF_HashSet_h
+#define WTF_HashSet_h
+
+#include "FastAllocBase.h"
+#include "HashTable.h"
+
+namespace WTF {
+
+    template<typename Value, typename HashFunctions, typename Traits> class HashSet;
+    template<typename Value, typename HashFunctions, typename Traits>
+    void deleteAllValues(const HashSet<Value, HashFunctions, Traits>&);
+    template<typename Value, typename HashFunctions, typename Traits>
+    void fastDeleteAllValues(const HashSet<Value, HashFunctions, Traits>&);
+
+    template<typename T> struct IdentityExtractor;
+
+    template<typename ValueArg, typename HashArg = typename DefaultHash<ValueArg>::Hash,
+        typename TraitsArg = HashTraits<ValueArg> > class HashSet : public FastAllocBase {
+    private:
+        typedef HashArg HashFunctions;
+        typedef TraitsArg ValueTraits;
+
+    public:
+        typedef typename ValueTraits::TraitType ValueType;
+
+    private:
+        typedef HashTable<ValueType, ValueType, IdentityExtractor<ValueType>,
+            HashFunctions, ValueTraits, ValueTraits> HashTableType;
+
+    public:
+        typedef HashTableConstIteratorAdapter<HashTableType, ValueType> iterator;
+        typedef HashTableConstIteratorAdapter<HashTableType, ValueType> const_iterator;
+
+        void swap(HashSet&);
+
+        int size() const;
+        int capacity() const;
+        bool isEmpty() const;
+
+        iterator begin() const;
+        iterator end() const;
+
+        iterator find(const ValueType&) const;
+        bool contains(const ValueType&) const;
+
+        // An alternate version of find() that finds the object by hashing and comparing
+        // with some other type, to avoid the cost of type conversion. HashTranslator
+        // must have the following function members:
+        //   static unsigned hash(const T&);
+        //   static bool equal(const ValueType&, const T&);
+        template<typename T, typename HashTranslator> iterator find(const T&) const;
+        template<typename T, typename HashTranslator> bool contains(const T&) const;
+
+        // The return value is a pair of an interator to the new value's location, 
+        // and a bool that is true if an new entry was added.
+        pair<iterator, bool> add(const ValueType&);
+
+        // An alternate version of add() that finds the object by hashing and comparing
+        // with some other type, to avoid the cost of type conversion if the object is already
+        // in the table. HashTranslator must have the following function members:
+        //   static unsigned hash(const T&);
+        //   static bool equal(const ValueType&, const T&);
+        //   static translate(ValueType&, const T&, unsigned hashCode);
+        template<typename T, typename HashTranslator> pair<iterator, bool> add(const T&);
+
+        void remove(const ValueType&);
+        void remove(iterator);
+        void clear();
+
+    private:
+        friend void deleteAllValues<>(const HashSet&);
+        friend void fastDeleteAllValues<>(const HashSet&);
+
+        HashTableType m_impl;
+    };
+
+    template<typename T> struct IdentityExtractor {
+        static const T& extract(const T& t) { return t; }
+    };
+
+    template<typename ValueType, typename ValueTraits, typename T, typename Translator>
+    struct HashSetTranslatorAdapter {
+        static unsigned hash(const T& key) { return Translator::hash(key); }
+        static bool equal(const ValueType& a, const T& b) { return Translator::equal(a, b); }
+        static void translate(ValueType& location, const T& key, const T&, unsigned hashCode)
+        {
+            Translator::translate(location, key, hashCode);
+        }
+    };
+
+    template<typename T, typename U, typename V>
+    inline void HashSet<T, U, V>::swap(HashSet& other)
+    {
+        m_impl.swap(other.m_impl); 
+    }
+
+    template<typename T, typename U, typename V>
+    inline int HashSet<T, U, V>::size() const
+    {
+        return m_impl.size(); 
+    }
+
+    template<typename T, typename U, typename V>
+    inline int HashSet<T, U, V>::capacity() const
+    {
+        return m_impl.capacity(); 
+    }
+
+    template<typename T, typename U, typename V>
+    inline bool HashSet<T, U, V>::isEmpty() const
+    {
+        return m_impl.isEmpty(); 
+    }
+
+    template<typename T, typename U, typename V>
+    inline typename HashSet<T, U, V>::iterator HashSet<T, U, V>::begin() const
+    {
+        return m_impl.begin(); 
+    }
+
+    template<typename T, typename U, typename V>
+    inline typename HashSet<T, U, V>::iterator HashSet<T, U, V>::end() const
+    {
+        return m_impl.end(); 
+    }
+
+    template<typename T, typename U, typename V>
+    inline typename HashSet<T, U, V>::iterator HashSet<T, U, V>::find(const ValueType& value) const
+    {
+        return m_impl.find(value); 
+    }
+
+    template<typename T, typename U, typename V>
+    inline bool HashSet<T, U, V>::contains(const ValueType& value) const
+    {
+        return m_impl.contains(value); 
+    }
+
+    template<typename Value, typename HashFunctions, typename Traits>
+    template<typename T, typename HashTranslator>
+    typename HashSet<Value, HashFunctions, Traits>::iterator
+    inline HashSet<Value, HashFunctions, Traits>::find(const T& value) const
+    {
+        typedef HashSetTranslatorAdapter<ValueType, ValueTraits, T, HashTranslator> Adapter;
+        return m_impl.template find<T, Adapter>(value);
+    }
+
+    template<typename Value, typename HashFunctions, typename Traits>
+    template<typename T, typename HashTranslator>
+    inline bool HashSet<Value, HashFunctions, Traits>::contains(const T& value) const
+    {
+        typedef HashSetTranslatorAdapter<ValueType, ValueTraits, T, HashTranslator> Adapter;
+        return m_impl.template contains<T, Adapter>(value);
+    }
+
+    template<typename T, typename U, typename V>
+    pair<typename HashSet<T, U, V>::iterator, bool> HashSet<T, U, V>::add(const ValueType& value)
+    {
+        return m_impl.add(value);
+    }
+
+    template<typename Value, typename HashFunctions, typename Traits>
+    template<typename T, typename HashTranslator>
+    pair<typename HashSet<Value, HashFunctions, Traits>::iterator, bool>
+    HashSet<Value, HashFunctions, Traits>::add(const T& value)
+    {
+        typedef HashSetTranslatorAdapter<ValueType, ValueTraits, T, HashTranslator> Adapter;
+        return m_impl.template addPassingHashCode<T, T, Adapter>(value, value);
+    }
+
+    template<typename T, typename U, typename V>
+    inline void HashSet<T, U, V>::remove(iterator it)
+    {
+        if (it.m_impl == m_impl.end())
+            return;
+        m_impl.internalCheckTableConsistency();
+        m_impl.removeWithoutEntryConsistencyCheck(it.m_impl);
+    }
+
+    template<typename T, typename U, typename V>
+    inline void HashSet<T, U, V>::remove(const ValueType& value)
+    {
+        remove(find(value));
+    }
+
+    template<typename T, typename U, typename V>
+    inline void HashSet<T, U, V>::clear()
+    {
+        m_impl.clear(); 
+    }
+
+    template<typename ValueType, typename HashTableType>
+    void deleteAllValues(HashTableType& collection)
+    {
+        typedef typename HashTableType::const_iterator iterator;
+        iterator end = collection.end();
+        for (iterator it = collection.begin(); it != end; ++it)
+            delete *it;
+    }
+
+    template<typename T, typename U, typename V>
+    inline void deleteAllValues(const HashSet<T, U, V>& collection)
+    {
+        deleteAllValues<typename HashSet<T, U, V>::ValueType>(collection.m_impl);
+    }
+
+    template<typename ValueType, typename HashTableType>
+    void fastDeleteAllValues(HashTableType& collection)
+    {
+        typedef typename HashTableType::const_iterator iterator;
+        iterator end = collection.end();
+        for (iterator it = collection.begin(); it != end; ++it)
+            fastDelete(*it);
+    }
+
+    template<typename T, typename U, typename V>
+    inline void fastDeleteAllValues(const HashSet<T, U, V>& collection)
+    {
+        fastDeleteAllValues<typename HashSet<T, U, V>::ValueType>(collection.m_impl);
+    }
+    
+    template<typename T, typename U, typename V, typename W>
+    inline void copyToVector(const HashSet<T, U, V>& collection, W& vector)
+    {
+        typedef typename HashSet<T, U, V>::const_iterator iterator;
+        
+        vector.resize(collection.size());
+        
+        iterator it = collection.begin();
+        iterator end = collection.end();
+        for (unsigned i = 0; it != end; ++it, ++i)
+            vector[i] = *it;
+    }  
+
+} // namespace WTF
+
+using WTF::HashSet;
+
+#endif /* WTF_HashSet_h */