Move Source/WTF/wtf to Source/wtf

Source/WTF/wtf/HashSet.h

-/*
- * Copyright (C) 2005, 2006, 2007, 2008, 2011 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 <wtf/FastAllocBase.h>
-#include <wtf/HashTable.h>
-
-namespace WTF {
-
-    struct IdentityExtractor;
-    
-    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 ValueArg, typename HashArg = typename DefaultHash<ValueArg>::Hash,
-        typename TraitsArg = HashTraits<ValueArg> > class HashSet {
-        WTF_MAKE_FAST_ALLOCATED;
-    private:
-        typedef HashArg HashFunctions;
-        typedef TraitsArg ValueTraits;
-
-    public:
-        typedef typename ValueTraits::TraitType ValueType;
-
-    private:
-        typedef HashTable<ValueType, ValueType, IdentityExtractor,
-            HashFunctions, ValueTraits, ValueTraits> HashTableType;
-
-    public:
-        typedef HashTableConstIteratorAdapter<HashTableType, ValueType> iterator;
-        typedef HashTableConstIteratorAdapter<HashTableType, ValueType> const_iterator;
-        typedef typename HashTableType::AddResult AddResult;
-
-        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&);
-        // FIXME: We should reverse the order of the template arguments so that callers
-        // can just pass the translator and let the compiler deduce 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.
-        AddResult 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);
-        // FIXME: We should reverse the order of the template arguments so that callers
-        // can just pass the translator and let the compiler deduce T.
-        template<typename T, typename HashTranslator> AddResult add(const T&);
-
-        void remove(const ValueType&);
-        void remove(iterator);
-        void clear();
-
-        static bool isValidValue(const ValueType&);
-
-    private:
-        friend void deleteAllValues<>(const HashSet&);
-
-        HashTableType m_impl;
-    };
-
-    struct IdentityExtractor {
-        template<typename T> static const T& extract(const T& t) { return t; }
-    };
-
-    template<typename Translator>
-    struct HashSetTranslatorAdapter {
-        template<typename T> static unsigned hash(const T& key) { return Translator::hash(key); }
-        template<typename T, typename U> static bool equal(const T& a, const U& b) { return Translator::equal(a, b); }
-        template<typename T, typename U> static void translate(T& location, const U& key, const U&, 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
-    {
-        return m_impl.template find<HashSetTranslatorAdapter<HashTranslator> >(value);
-    }
-
-    template<typename Value, typename HashFunctions, typename Traits>
-    template<typename T, typename HashTranslator>
-    inline bool HashSet<Value, HashFunctions, Traits>::contains(const T& value) const
-    {
-        return m_impl.template contains<HashSetTranslatorAdapter<HashTranslator> >(value);
-    }
-
-    template<typename T, typename U, typename V>
-    inline typename HashSet<T, U, V>::AddResult 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>
-    inline typename HashSet<Value, HashFunctions, Traits>::AddResult
-    HashSet<Value, HashFunctions, Traits>::add(const T& value)
-    {
-        return m_impl.template addPassingHashCode<HashSetTranslatorAdapter<HashTranslator> >(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 T, typename U, typename V>
-    inline bool HashSet<T, U, V>::isValidValue(const ValueType& value)
-    {
-        if (ValueTraits::isDeletedValue(value))
-            return false;
-
-        if (HashFunctions::safeToCompareToEmptyOrDeleted) {
-            if (value == ValueTraits::emptyValue())
-                return false;
-        } else {
-            if (isHashTraitsEmptyValue<ValueTraits>(value))
-                return false;
-        }
-
-        return true;
-    }
-
-    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 C, typename W>
-    inline void copyToVector(const C& collection, W& vector)
-    {
-        typedef typename C::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 */