#ifndef WTF_HashMap_h
#define WTF_HashMap_h
#include <initializer_list>
#include <wtf/HashTable.h>
#include <wtf/IteratorRange.h>
namespace WTF {
template<typename T> struct KeyValuePairKeyExtractor {
static const typename T::KeyType& extract(const T& p) { return p.key; }
};
template<typename KeyArg, typename MappedArg, typename HashArg = typename DefaultHash<KeyArg>::Hash,
typename KeyTraitsArg = HashTraits<KeyArg>, typename MappedTraitsArg = HashTraits<MappedArg>>
class HashMap final {
WTF_MAKE_FAST_ALLOCATED;
private:
typedef KeyTraitsArg KeyTraits;
typedef MappedTraitsArg MappedTraits;
struct KeyValuePairTraits : KeyValuePairHashTraits<KeyTraits, MappedTraits> {
static const bool hasIsEmptyValueFunction = true;
static bool isEmptyValue(const typename KeyValuePairHashTraits<KeyTraits, MappedTraits>::TraitType& value)
{
return isHashTraitsEmptyValue<KeyTraits>(value.key);
}
};
public:
typedef typename KeyTraits::TraitType KeyType;
typedef typename MappedTraits::TraitType MappedType;
typedef typename KeyValuePairTraits::TraitType KeyValuePairType;
private:
typedef typename MappedTraits::PeekType MappedPeekType;
typedef HashArg HashFunctions;
typedef HashTable<KeyType, KeyValuePairType, KeyValuePairKeyExtractor<KeyValuePairType>,
HashFunctions, KeyValuePairTraits, KeyTraits> HashTableType;
class HashMapKeysProxy;
class HashMapValuesProxy;
public:
typedef HashTableIteratorAdapter<HashTableType, KeyValuePairType> iterator;
typedef HashTableConstIteratorAdapter<HashTableType, KeyValuePairType> const_iterator;
typedef typename HashTableType::AddResult AddResult;
public:
HashMap()
{
}
HashMap(std::initializer_list<KeyValuePairType> initializerList)
{
for (const auto& keyValuePair : initializerList)
add(keyValuePair.key, keyValuePair.value);
}
void swap(HashMap&);
unsigned size() const;
unsigned capacity() const;
bool isEmpty() const;
iterator begin();
iterator end();
const_iterator begin() const;
const_iterator end() const;
IteratorRange<typename iterator::Keys> keys() { return makeIteratorRange(begin().keys(), end().keys()); }
const IteratorRange<typename const_iterator::Keys> keys() const { return makeIteratorRange(begin().keys(), end().keys()); }
IteratorRange<typename iterator::Values> values() { return makeIteratorRange(begin().values(), end().values()); }
const IteratorRange<typename const_iterator::Values> values() const { return makeIteratorRange(begin().values(), end().values()); }
iterator find(const KeyType&);
const_iterator find(const KeyType&) const;
bool contains(const KeyType&) const;
MappedPeekType get(const KeyType&) const;
template<typename V> AddResult set(const KeyType&, V&&);
template<typename V> AddResult set(KeyType&&, V&&);
template<typename V> AddResult add(const KeyType&, V&&);
template<typename V> AddResult add(KeyType&&, V&&);
template<typename V> AddResult fastAdd(const KeyType&, V&&);
template<typename V> AddResult fastAdd(KeyType&&, V&&);
bool remove(const KeyType&);
bool remove(iterator);
template<typename Functor>
void removeIf(const Functor& functor);
void clear();
MappedType take(const KeyType&);
template<typename HashTranslator, typename T> iterator find(const T&);
template<typename HashTranslator, typename T> const_iterator find(const T&) const;
template<typename HashTranslator, typename T> bool contains(const T&) const;
template<typename HashTranslator, typename K, typename V> AddResult add(K&&, V&&);
template<typename K = KeyType> typename std::enable_if<IsSmartPtr<K>::value, iterator>::type find(typename GetPtrHelper<K>::PtrType);
template<typename K = KeyType> typename std::enable_if<IsSmartPtr<K>::value, const_iterator>::type find(typename GetPtrHelper<K>::PtrType) const;
template<typename K = KeyType> typename std::enable_if<IsSmartPtr<K>::value, bool>::type contains(typename GetPtrHelper<K>::PtrType) const;
template<typename K = KeyType> typename std::enable_if<IsSmartPtr<K>::value, MappedPeekType>::type inlineGet(typename GetPtrHelper<K>::PtrType) const;
template<typename K = KeyType> typename std::enable_if<IsSmartPtr<K>::value, MappedPeekType>::type get(typename GetPtrHelper<K>::PtrType) const;
template<typename K = KeyType> typename std::enable_if<IsSmartPtr<K>::value, bool>::type remove(typename GetPtrHelper<K>::PtrType);
template<typename K = KeyType> typename std::enable_if<IsSmartPtr<K>::value, MappedType>::type take(typename GetPtrHelper<K>::PtrType);
void checkConsistency() const;
static bool isValidKey(const KeyType&);
private:
template<typename K, typename V>
AddResult inlineSet(K&&, V&&);
template<typename K, typename V>
AddResult inlineAdd(K&&, V&&);
HashTableType m_impl;
};
template<typename ValueTraits, typename HashFunctions>
struct HashMapTranslator {
template<typename T> static unsigned hash(const T& key) { return HashFunctions::hash(key); }
template<typename T, typename U> static bool equal(const T& a, const U& b) { return HashFunctions::equal(a, b); }
template<typename T, typename U, typename V> static void translate(T& location, U&& key, V&& mapped)
{
location.key = std::forward<U>(key);
location.value = std::forward<V>(mapped);
}
};
template<typename ValueTraits, typename Translator>
struct HashMapTranslatorAdapter {
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, typename V> static void translate(T& location, U&& key, V&& mapped, unsigned hashCode)
{
Translator::translate(location.key, key, hashCode);
location.value = std::forward<V>(mapped);
}
};
template<typename T, typename U, typename V, typename W, typename X>
inline void HashMap<T, U, V, W, X>::swap(HashMap& other)
{
m_impl.swap(other.m_impl);
}
template<typename T, typename U, typename V, typename W, typename X>
inline unsigned HashMap<T, U, V, W, X>::size() const
{
return m_impl.size();
}
template<typename T, typename U, typename V, typename W, typename X>
inline unsigned HashMap<T, U, V, W, X>::capacity() const
{
return m_impl.capacity();
}
template<typename T, typename U, typename V, typename W, typename X>
inline bool HashMap<T, U, V, W, X>::isEmpty() const
{
return m_impl.isEmpty();
}
template<typename T, typename U, typename V, typename W, typename X>
inline auto HashMap<T, U, V, W, X>::begin() -> iterator
{
return m_impl.begin();
}
template<typename T, typename U, typename V, typename W, typename X>
inline auto HashMap<T, U, V, W, X>::end() -> iterator
{
return m_impl.end();
}
template<typename T, typename U, typename V, typename W, typename X>
inline auto HashMap<T, U, V, W, X>::begin() const -> const_iterator
{
return m_impl.begin();
}
template<typename T, typename U, typename V, typename W, typename X>
inline auto HashMap<T, U, V, W, X>::end() const -> const_iterator
{
return m_impl.end();
}
template<typename T, typename U, typename V, typename W, typename X>
inline auto HashMap<T, U, V, W, X>::find(const KeyType& key) -> iterator
{
return m_impl.find(key);
}
template<typename T, typename U, typename V, typename W, typename X>
inline auto HashMap<T, U, V, W, X>::find(const KeyType& key) const -> const_iterator
{
return m_impl.find(key);
}
template<typename T, typename U, typename V, typename W, typename X>
inline bool HashMap<T, U, V, W, X>::contains(const KeyType& key) const
{
return m_impl.contains(key);
}
template<typename T, typename U, typename V, typename W, typename X>
template<typename HashTranslator, typename TYPE>
inline typename HashMap<T, U, V, W, X>::iterator
HashMap<T, U, V, W, X>::find(const TYPE& value)
{
return m_impl.template find<HashMapTranslatorAdapter<KeyValuePairTraits, HashTranslator>>(value);
}
template<typename T, typename U, typename V, typename W, typename X>
template<typename HashTranslator, typename TYPE>
inline typename HashMap<T, U, V, W, X>::const_iterator
HashMap<T, U, V, W, X>::find(const TYPE& value) const
{
return m_impl.template find<HashMapTranslatorAdapter<KeyValuePairTraits, HashTranslator>>(value);
}
template<typename T, typename U, typename V, typename W, typename X>
template<typename HashTranslator, typename TYPE>
inline bool HashMap<T, U, V, W, X>::contains(const TYPE& value) const
{
return m_impl.template contains<HashMapTranslatorAdapter<KeyValuePairTraits, HashTranslator>>(value);
}
template<typename KeyArg, typename MappedArg, typename HashArg, typename KeyTraitsArg, typename MappedTraitsArg>
template<typename K, typename V>
auto HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg>::inlineSet(K&& key, V&& value) -> AddResult
{
AddResult result = inlineAdd(std::forward<K>(key), std::forward<V>(value));
if (!result.isNewEntry) {
result.iterator->value = std::forward<V>(value);
}
return result;
}
template<typename KeyArg, typename MappedArg, typename HashArg, typename KeyTraitsArg, typename MappedTraitsArg>
template<typename K, typename V>
ALWAYS_INLINE auto HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg>::inlineAdd(K&& key, V&& value) -> AddResult
{
return m_impl.template add<HashMapTranslator<KeyValuePairTraits, HashFunctions>>(std::forward<K>(key), std::forward<V>(value));
}
template<typename KeyArg, typename MappedArg, typename HashArg, typename KeyTraitsArg, typename MappedTraitsArg>
template<typename T>
auto HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg>::set(const KeyType& key, T&& mapped) -> AddResult
{
return inlineSet(key, std::forward<T>(mapped));
}
template<typename KeyArg, typename MappedArg, typename HashArg, typename KeyTraitsArg, typename MappedTraitsArg>
template<typename T>
auto HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg>::set(KeyType&& key, T&& mapped) -> AddResult
{
return inlineSet(WTF::move(key), std::forward<T>(mapped));
}
template<typename KeyArg, typename MappedArg, typename HashArg, typename KeyTraitsArg, typename MappedTraitsArg>
template<typename HashTranslator, typename K, typename V>
auto HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg>::add(K&& key, V&& value) -> AddResult
{
return m_impl.template addPassingHashCode<HashMapTranslatorAdapter<KeyValuePairTraits, HashTranslator>>(std::forward<K>(key), std::forward<V>(value));
}
template<typename KeyArg, typename MappedArg, typename HashArg, typename KeyTraitsArg, typename MappedTraitsArg>
template<typename T>
auto HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg>::add(const KeyType& key, T&& mapped) -> AddResult
{
return inlineAdd(key, std::forward<T>(mapped));
}
template<typename KeyArg, typename MappedArg, typename HashArg, typename KeyTraitsArg, typename MappedTraitsArg>
template<typename T>
auto HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg>::add(KeyType&& key, T&& mapped) -> AddResult
{
return inlineAdd(WTF::move(key), std::forward<T>(mapped));
}
template<typename KeyArg, typename MappedArg, typename HashArg, typename KeyTraitsArg, typename MappedTraitsArg>
template<typename T>
ALWAYS_INLINE auto HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg>::fastAdd(const KeyType& key, T&& mapped) -> AddResult
{
return inlineAdd(key, std::forward<T>(mapped));
}
template<typename KeyArg, typename MappedArg, typename HashArg, typename KeyTraitsArg, typename MappedTraitsArg>
template<typename T>
ALWAYS_INLINE auto HashMap<KeyArg, MappedArg, HashArg, KeyTraitsArg, MappedTraitsArg>::fastAdd(KeyType&& key, T&& mapped) -> AddResult
{
return inlineAdd(WTF::move(key), std::forward<T>(mapped));
}
template<typename T, typename U, typename V, typename W, typename MappedTraits>
auto HashMap<T, U, V, W, MappedTraits>::get(const KeyType& key) const -> MappedPeekType
{
KeyValuePairType* entry = const_cast<HashTableType&>(m_impl).lookup(key);
if (!entry)
return MappedTraits::peek(MappedTraits::emptyValue());
return MappedTraits::peek(entry->value);
}
template<typename T, typename U, typename V, typename W, typename X>
inline bool HashMap<T, U, V, W, X>::remove(iterator it)
{
if (it.m_impl == m_impl.end())
return false;
m_impl.internalCheckTableConsistency();
m_impl.removeWithoutEntryConsistencyCheck(it.m_impl);
return true;
}
template<typename T, typename U, typename V, typename W, typename X>
template<typename Functor>
inline void HashMap<T, U, V, W, X>::removeIf(const Functor& functor)
{
m_impl.removeIf(functor);
}
template<typename T, typename U, typename V, typename W, typename X>
inline bool HashMap<T, U, V, W, X>::remove(const KeyType& key)
{
return remove(find(key));
}
template<typename T, typename U, typename V, typename W, typename X>
inline void HashMap<T, U, V, W, X>::clear()
{
m_impl.clear();
}
template<typename T, typename U, typename V, typename W, typename MappedTraits>
auto HashMap<T, U, V, W, MappedTraits>::take(const KeyType& key) -> MappedType
{
iterator it = find(key);
if (it == end())
return MappedTraits::emptyValue();
MappedType value = WTF::move(it->value);
remove(it);
return value;
}
template<typename T, typename U, typename V, typename W, typename X>
template<typename K>
inline auto HashMap<T, U, V, W, X>::find(typename GetPtrHelper<K>::PtrType key) -> typename std::enable_if<IsSmartPtr<K>::value, iterator>::type
{
return m_impl.template find<HashMapTranslator<KeyValuePairTraits, HashFunctions>>(key);
}
template<typename T, typename U, typename V, typename W, typename X>
template<typename K>
inline auto HashMap<T, U, V, W, X>::find(typename GetPtrHelper<K>::PtrType key) const -> typename std::enable_if<IsSmartPtr<K>::value, const_iterator>::type
{
return m_impl.template find<HashMapTranslator<KeyValuePairTraits, HashFunctions>>(key);
}
template<typename T, typename U, typename V, typename W, typename X>
template<typename K>
inline auto HashMap<T, U, V, W, X>::contains(typename GetPtrHelper<K>::PtrType key) const -> typename std::enable_if<IsSmartPtr<K>::value, bool>::type
{
return m_impl.template contains<HashMapTranslator<KeyValuePairTraits, HashFunctions>>(key);
}
template<typename T, typename U, typename V, typename W, typename X>
template<typename K>
inline auto HashMap<T, U, V, W, X>::inlineGet(typename GetPtrHelper<K>::PtrType key) const -> typename std::enable_if<IsSmartPtr<K>::value, MappedPeekType>::type
{
KeyValuePairType* entry = const_cast<HashTableType&>(m_impl).template lookup<HashMapTranslator<KeyValuePairTraits, HashFunctions>>(key);
if (!entry)
return MappedTraits::peek(MappedTraits::emptyValue());
return MappedTraits::peek(entry->value);
}
template<typename T, typename U, typename V, typename W, typename X>
template<typename K>
auto HashMap<T, U, V, W, X>::get(typename GetPtrHelper<K>::PtrType key) const -> typename std::enable_if<IsSmartPtr<K>::value, MappedPeekType>::type
{
return inlineGet(key);
}
template<typename T, typename U, typename V, typename W, typename X>
template<typename K>
inline auto HashMap<T, U, V, W, X>::remove(typename GetPtrHelper<K>::PtrType key) -> typename std::enable_if<IsSmartPtr<K>::value, bool>::type
{
return remove(find(key));
}
template<typename T, typename U, typename V, typename W, typename X>
template<typename K>
inline auto HashMap<T, U, V, W, X>::take(typename GetPtrHelper<K>::PtrType key) -> typename std::enable_if<IsSmartPtr<K>::value, MappedType>::type
{
iterator it = find(key);
if (it == end())
return MappedTraits::emptyValue();
MappedType value = WTF::move(it->value);
remove(it);
return value;
}
template<typename T, typename U, typename V, typename W, typename X>
inline void HashMap<T, U, V, W, X>::checkConsistency() const
{
m_impl.checkTableConsistency();
}
template<typename T, typename U, typename V, typename W, typename X>
inline bool HashMap<T, U, V, W, X>::isValidKey(const KeyType& key)
{
if (KeyTraits::isDeletedValue(key))
return false;
if (HashFunctions::safeToCompareToEmptyOrDeleted) {
if (key == KeyTraits::emptyValue())
return false;
} else {
if (isHashTraitsEmptyValue<KeyTraits>(key))
return false;
}
return true;
}
template<typename T, typename U, typename V, typename W, typename X>
bool operator==(const HashMap<T, U, V, W, X>& a, const HashMap<T, U, V, W, X>& b)
{
if (a.size() != b.size())
return false;
typedef typename HashMap<T, U, V, W, X>::const_iterator const_iterator;
const_iterator end = a.end();
const_iterator notFound = b.end();
for (const_iterator it = a.begin(); it != end; ++it) {
const_iterator bPos = b.find(it->key);
if (bPos == notFound || it->value != bPos->value)
return false;
}
return true;
}
template<typename T, typename U, typename V, typename W, typename X>
inline bool operator!=(const HashMap<T, U, V, W, X>& a, const HashMap<T, U, V, W, X>& b)
{
return !(a == b);
}
template<typename T, typename U, typename V, typename W, typename X, typename Y>
inline void copyToVector(const HashMap<T, U, V, W, X>& collection, Y& vector)
{
typedef typename HashMap<T, U, V, W, X>::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).key, (*it).value };
}
template<typename T, typename U, typename V, typename W, typename X, typename Y>
inline void copyKeysToVector(const HashMap<T, U, V, W, X>& collection, Y& vector)
{
typedef typename HashMap<T, U, V, W, X>::const_iterator::Keys iterator;
vector.resize(collection.size());
iterator it = collection.begin().keys();
iterator end = collection.end().keys();
for (unsigned i = 0; it != end; ++it, ++i)
vector[i] = *it;
}
template<typename T, typename U, typename V, typename W, typename X, typename Y>
inline void copyValuesToVector(const HashMap<T, U, V, W, X>& collection, Y& vector)
{
typedef typename HashMap<T, U, V, W, X>::const_iterator::Values iterator;
vector.resize(collection.size());
iterator it = collection.begin().values();
iterator end = collection.end().values();
for (unsigned i = 0; it != end; ++it, ++i)
vector[i] = *it;
}
}
using WTF::HashMap;
#endif