#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;
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;
std::pair<iterator, bool> add(const ValueType&);
bool remove(const ValueType&);
bool remove(iterator);
void removeAll(iterator);
void removeAll(const ValueType&);
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;
}
}
using WTF::HashCountedSet;
#endif