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-rw-r--r--JavaScriptCore/wtf/HashCountedSet.h228
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diff --git a/JavaScriptCore/wtf/HashCountedSet.h b/JavaScriptCore/wtf/HashCountedSet.h
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-/*
- * Copyright (C) 2005, 2006, 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_HashCountedSet_h
-#define WTF_HashCountedSet_h
-
-#include "Assertions.h"
-#include "FastAllocBase.h"
-#include "HashMap.h"
-#include "Vector.h"
-
-namespace WTF {
-
- template<typename Value, typename HashFunctions = typename DefaultHash<Value>::Hash,
- typename Traits = HashTraits<Value> > class HashCountedSet : public FastAllocBase {
- private:
- typedef HashMap<Value, unsigned, HashFunctions, Traits> ImplType;
- public:
- typedef Value ValueType;
- typedef typename ImplType::iterator iterator;
- typedef typename ImplType::const_iterator const_iterator;
-
- HashCountedSet() {}
-
- int size() const;
- int capacity() const;
- bool isEmpty() const;
-
- // Iterators iterate over pairs of values and counts.
- iterator begin();
- iterator end();
- const_iterator begin() const;
- const_iterator end() const;
-
- iterator find(const ValueType&);
- const_iterator find(const ValueType&) const;
- bool contains(const ValueType&) const;
- unsigned count(const ValueType&) const;
-
- // Increases the count if an equal value is already present
- // 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.
- std::pair<iterator, bool> add(const ValueType&);
-
- // Reduces the count of the value, and removes it if count
- // goes down to zero, returns true if the value is removed.
- bool remove(const ValueType&);
- bool remove(iterator);
-
- // Removes the value, regardless of its count.
- void removeAll(iterator);
- void removeAll(const ValueType&);
-
- // Clears the whole set.
- void clear();
-
- private:
- ImplType m_impl;
- };
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline int HashCountedSet<Value, HashFunctions, Traits>::size() const
- {
- return m_impl.size();
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline int HashCountedSet<Value, HashFunctions, Traits>::capacity() const
- {
- return m_impl.capacity();
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline bool HashCountedSet<Value, HashFunctions, Traits>::isEmpty() const
- {
- return size() == 0;
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline typename HashCountedSet<Value, HashFunctions, Traits>::iterator HashCountedSet<Value, HashFunctions, Traits>::begin()
- {
- return m_impl.begin();
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline typename HashCountedSet<Value, HashFunctions, Traits>::iterator HashCountedSet<Value, HashFunctions, Traits>::end()
- {
- return m_impl.end();
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline typename HashCountedSet<Value, HashFunctions, Traits>::const_iterator HashCountedSet<Value, HashFunctions, Traits>::begin() const
- {
- return m_impl.begin();
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline typename HashCountedSet<Value, HashFunctions, Traits>::const_iterator HashCountedSet<Value, HashFunctions, Traits>::end() const
- {
- return m_impl.end();
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline typename HashCountedSet<Value, HashFunctions, Traits>::iterator HashCountedSet<Value, HashFunctions, Traits>::find(const ValueType& value)
- {
- return m_impl.find(value);
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline typename HashCountedSet<Value, HashFunctions, Traits>::const_iterator HashCountedSet<Value, HashFunctions, Traits>::find(const ValueType& value) const
- {
- return m_impl.find(value);
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline bool HashCountedSet<Value, HashFunctions, Traits>::contains(const ValueType& value) const
- {
- return m_impl.contains(value);
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline unsigned HashCountedSet<Value, HashFunctions, Traits>::count(const ValueType& value) const
- {
- return m_impl.get(value);
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline std::pair<typename HashCountedSet<Value, HashFunctions, Traits>::iterator, bool> HashCountedSet<Value, HashFunctions, Traits>::add(const ValueType &value)
- {
- pair<iterator, bool> result = m_impl.add(value, 0);
- ++result.first->second;
- return result;
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline bool HashCountedSet<Value, HashFunctions, Traits>::remove(const ValueType& value)
- {
- return remove(find(value));
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline bool HashCountedSet<Value, HashFunctions, Traits>::remove(iterator it)
- {
- if (it == end())
- return false;
-
- unsigned oldVal = it->second;
- ASSERT(oldVal);
- unsigned newVal = oldVal - 1;
- if (newVal) {
- it->second = newVal;
- return false;
- }
-
- m_impl.remove(it);
- return true;
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline void HashCountedSet<Value, HashFunctions, Traits>::removeAll(const ValueType& value)
- {
- removeAll(find(value));
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline void HashCountedSet<Value, HashFunctions, Traits>::removeAll(iterator it)
- {
- if (it == end())
- return;
-
- m_impl.remove(it);
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline void HashCountedSet<Value, HashFunctions, Traits>::clear()
- {
- m_impl.clear();
- }
-
- template<typename Value, typename HashFunctions, typename Traits, typename VectorType>
- inline void copyToVector(const HashCountedSet<Value, HashFunctions, Traits>& collection, VectorType& vector)
- {
- typedef typename HashCountedSet<Value, HashFunctions, Traits>::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;
- }
-
- template<typename Value, typename HashFunctions, typename Traits>
- inline void copyToVector(const HashCountedSet<Value, HashFunctions, Traits>& collection, Vector<Value>& vector)
- {
- typedef typename HashCountedSet<Value, HashFunctions, Traits>::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).first;
- }
-
-
-} // namespace khtml
-
-using WTF::HashCountedSet;
-
-#endif /* WTF_HashCountedSet_h */
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