diff options
Diffstat (limited to 'JavaScriptCore/wtf/HashMap.h')
| -rw-r--r-- | JavaScriptCore/wtf/HashMap.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/JavaScriptCore/wtf/HashMap.h b/JavaScriptCore/wtf/HashMap.h index 3de5ee6..ece3812 100644 --- a/JavaScriptCore/wtf/HashMap.h +++ b/JavaScriptCore/wtf/HashMap.h @@ -83,6 +83,23 @@ namespace WTF { MappedType take(const KeyType&); // efficient combination of get with remove + // 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&); + template<typename T, typename HashTranslator> const_iterator find(const T&) const; + template<typename T, typename HashTranslator> bool contains(const T&) const; + + // 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&, const MappedType&); + private: pair<iterator, bool> inlineAdd(const KeyType&, const MappedType&); @@ -107,6 +124,19 @@ namespace WTF { } }; + template<typename ValueType, typename ValueTraits, typename T, typename Translator> + struct HashMapTranslatorAdapter { + typedef typename ValueType::first_type KeyType; + typedef typename ValueType::second_type MappedType; + + static unsigned hash(const T& key) { return Translator::hash(key); } + static bool equal(const KeyType& a, const T& b) { return Translator::equal(a, b); } + static void translate(ValueType& location, const T& key, const MappedType&, unsigned hashCode) + { + Translator::translate(location.first, key, hashCode); + } + }; + template<typename T, typename U, typename V, typename W, typename X> inline void HashMap<T, U, V, W, X>::swap(HashMap& other) { @@ -174,6 +204,33 @@ namespace WTF { } template<typename T, typename U, typename V, typename W, typename X> + template<typename TYPE, typename HashTranslator> + inline typename HashMap<T, U, V, W, X>::iterator + HashMap<T, U, V, W, X>::find(const TYPE& value) + { + typedef HashMapTranslatorAdapter<ValueType, ValueTraits, TYPE, HashTranslator> Adapter; + return m_impl.template find<TYPE, Adapter>(value); + } + + template<typename T, typename U, typename V, typename W, typename X> + template<typename TYPE, typename HashTranslator> + inline typename HashMap<T, U, V, W, X>::const_iterator + HashMap<T, U, V, W, X>::find(const TYPE& value) const + { + typedef HashMapTranslatorAdapter<ValueType, ValueTraits, TYPE, HashTranslator> Adapter; + return m_impl.template find<TYPE, Adapter>(value); + } + + template<typename T, typename U, typename V, typename W, typename X> + template<typename TYPE, typename HashTranslator> + inline bool + HashMap<T, U, V, W, X>::contains(const TYPE& value) const + { + typedef HashMapTranslatorAdapter<ValueType, ValueTraits, TYPE, HashTranslator> Adapter; + return m_impl.template contains<TYPE, Adapter>(value); + } + + template<typename T, typename U, typename V, typename W, typename X> inline pair<typename HashMap<T, U, V, W, X>::iterator, bool> HashMap<T, U, V, W, X>::inlineAdd(const KeyType& key, const MappedType& mapped) { @@ -194,6 +251,15 @@ namespace WTF { } template<typename T, typename U, typename V, typename W, typename X> + template<typename TYPE, typename HashTranslator> + pair<typename HashMap<T, U, V, W, X>::iterator, bool> + HashMap<T, U, V, W, X>::add(const TYPE& key, const MappedType& value) + { + typedef HashMapTranslatorAdapter<ValueType, ValueTraits, TYPE, HashTranslator> Adapter; + return m_impl.template addPassingHashCode<TYPE, MappedType, Adapter>(key, value); + } + + template<typename T, typename U, typename V, typename W, typename X> pair<typename HashMap<T, U, V, W, X>::iterator, bool> HashMap<T, U, V, W, X>::add(const KeyType& key, const MappedType& mapped) { |