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Whole document tree                   hash_map Go to the documentation of this file. // Hashing map implementation -*- C++ -*- // Copyright (C) 2001 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 2, 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 General Public License for more details. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING. If not, write to the Free // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, // USA. // As a special exception, you may use this file as part of a free software // library without restriction. Specifically, if other files instantiate // templates or use macros or inline functions from this file, or you compile // this file and link it with other files to produce an executable, this // file does not by itself cause the resulting executable to be covered by // the GNU General Public License. This exception does not however // invalidate any other reasons why the executable file might be covered by // the GNU General Public License. /* * Copyright (c) 1996 * Silicon Graphics Computer Systems, Inc. * * Permission to use, copy, modify, distribute and sell this software * and its documentation for any purpose is hereby granted without fee, * provided that the above copyright notice appear in all copies and * that both that copyright notice and this permission notice appear * in supporting documentation. Silicon Graphics makes no * representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied warranty. * * * Copyright (c) 1994 * Hewlett-Packard Company * * Permission to use, copy, modify, distribute and sell this software * and its documentation for any purpose is hereby granted without fee, * provided that the above copyright notice appear in all copies and * that both that copyright notice and this permission notice appear * in supporting documentation. Hewlett-Packard Company makes no * representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied warranty. * */ /* NOTE: This is an internal header file, included by other STL headers. * You should not attempt to use it directly. */ #ifndef __SGI_STL_INTERNAL_HASH_MAP_H #define __SGI_STL_INTERNAL_HASH_MAP_H #include <ext/stl_hashtable.h> #include <bits/concept_check.h> namespace std { // Forward declaration of equality operator; needed for friend declaration. template <class _Key, class _Tp, class _HashFcn = hash<_Key>, class _EqualKey = equal_to<_Key>, class _Alloc = allocator<_Tp> > class hash_map; template <class _Key, class _Tp, class _HashFn, class _EqKey, class _Alloc> inline bool operator==(const hash_map<_Key, _Tp, _HashFn, _EqKey, _Alloc>&, const hash_map<_Key, _Tp, _HashFn, _EqKey, _Alloc>&); template <class _Key, class _Tp, class _HashFcn, class _EqualKey, class _Alloc> class hash_map { private: typedef hashtable<pair<const _Key,_Tp>,_Key,_HashFcn, _Select1st<pair<const _Key,_Tp> >,_EqualKey,_Alloc> _Ht; _Ht _M_ht; public: typedef typename _Ht::key_type key_type; typedef _Tp data_type; typedef _Tp mapped_type; typedef typename _Ht::value_type value_type; typedef typename _Ht::hasher hasher; typedef typename _Ht::key_equal key_equal; typedef typename _Ht::size_type size_type; typedef typename _Ht::difference_type difference_type; typedef typename _Ht::pointer pointer; typedef typename _Ht::const_pointer const_pointer; typedef typename _Ht::reference reference; typedef typename _Ht::const_reference const_reference; typedef typename _Ht::iterator iterator; typedef typename _Ht::const_iterator const_iterator; typedef typename _Ht::allocator_type allocator_type; hasher hash_funct() const { return _M_ht.hash_funct(); } key_equal key_eq() const { return _M_ht.key_eq(); } allocator_type get_allocator() const { return _M_ht.get_allocator(); } public: hash_map() : _M_ht(100, hasher(), key_equal(), allocator_type()) {} explicit hash_map(size_type __n) : _M_ht(__n, hasher(), key_equal(), allocator_type()) {} hash_map(size_type __n, const hasher& __hf) : _M_ht(__n, __hf, key_equal(), allocator_type()) {} hash_map(size_type __n, const hasher& __hf, const key_equal& __eql, const allocator_type& __a = allocator_type()) : _M_ht(__n, __hf, __eql, __a) {} template <class _InputIterator> hash_map(_InputIterator __f, _InputIterator __l) : _M_ht(100, hasher(), key_equal(), allocator_type()) { _M_ht.insert_unique(__f, __l); } template <class _InputIterator> hash_map(_InputIterator __f, _InputIterator __l, size_type __n) : _M_ht(__n, hasher(), key_equal(), allocator_type()) { _M_ht.insert_unique(__f, __l); } template <class _InputIterator> hash_map(_InputIterator __f, _InputIterator __l, size_type __n, const hasher& __hf) : _M_ht(__n, __hf, key_equal(), allocator_type()) { _M_ht.insert_unique(__f, __l); } template <class _InputIterator> hash_map(_InputIterator __f, _InputIterator __l, size_type __n, const hasher& __hf, const key_equal& __eql, const allocator_type& __a = allocator_type()) : _M_ht(__n, __hf, __eql, __a) { _M_ht.insert_unique(__f, __l); } public: size_type size() const { return _M_ht.size(); } size_type max_size() const { return _M_ht.max_size(); } bool empty() const { return _M_ht.empty(); } void swap(hash_map& __hs) { _M_ht.swap(__hs._M_ht); } template <class _K1, class _T1, class _HF, class _EqK, class _Al> friend bool operator== (const hash_map<_K1, _T1, _HF, _EqK, _Al>&, const hash_map<_K1, _T1, _HF, _EqK, _Al>&); iterator begin() { return _M_ht.begin(); } iterator end() { return _M_ht.end(); } const_iterator begin() const { return _M_ht.begin(); } const_iterator end() const { return _M_ht.end(); } public: pair<iterator,bool> insert(const value_type& __obj) { return _M_ht.insert_unique(__obj); } template <class _InputIterator> void insert(_InputIterator __f, _InputIterator __l) { _M_ht.insert_unique(__f,__l); } pair<iterator,bool> insert_noresize(const value_type& __obj) { return _M_ht.insert_unique_noresize(__obj); } iterator find(const key_type& __key) { return _M_ht.find(__key); } const_iterator find(const key_type& __key) const { return _M_ht.find(__key); } _Tp& operator[](const key_type& __key) { return _M_ht.find_or_insert(value_type(__key, _Tp())).second; } size_type count(const key_type& __key) const { return _M_ht.count(__key); } pair<iterator, iterator> equal_range(const key_type& __key) { return _M_ht.equal_range(__key); } pair<const_iterator, const_iterator> equal_range(const key_type& __key) const { return _M_ht.equal_range(__key); } size_type erase(const key_type& __key) {return _M_ht.erase(__key); } void erase(iterator __it) { _M_ht.erase(__it); } void erase(iterator __f, iterator __l) { _M_ht.erase(__f, __l); } void clear() { _M_ht.clear(); } void resize(size_type __hint) { _M_ht.resize(__hint); } size_type bucket_count() const { return _M_ht.bucket_count(); } size_type max_bucket_count() const { return _M_ht.max_bucket_count(); } size_type elems_in_bucket(size_type __n) const { return _M_ht.elems_in_bucket(__n); } }; template <class _Key, class _Tp, class _HashFcn, class _EqlKey, class _Alloc> inline bool operator==(const hash_map<_Key,_Tp,_HashFcn,_EqlKey,_Alloc>& __hm1, const hash_map<_Key,_Tp,_HashFcn,_EqlKey,_Alloc>& __hm2) { return __hm1._M_ht == __hm2._M_ht; } template <class _Key, class _Tp, class _HashFcn, class _EqlKey, class _Alloc> inline bool operator!=(const hash_map<_Key,_Tp,_HashFcn,_EqlKey,_Alloc>& __hm1, const hash_map<_Key,_Tp,_HashFcn,_EqlKey,_Alloc>& __hm2) { return !(__hm1 == __hm2); } template <class _Key, class _Tp, class _HashFcn, class _EqlKey, class _Alloc> inline void swap(hash_map<_Key,_Tp,_HashFcn,_EqlKey,_Alloc>& __hm1, hash_map<_Key,_Tp,_HashFcn,_EqlKey,_Alloc>& __hm2) { __hm1.swap(__hm2); } // Forward declaration of equality operator; needed for friend declaration. template <class _Key, class _Tp, class _HashFcn = hash<_Key>, class _EqualKey = equal_to<_Key>, class _Alloc = allocator<_Tp> > class hash_multimap; template <class _Key, class _Tp, class _HF, class _EqKey, class _Alloc> inline bool operator==(const hash_multimap<_Key,_Tp,_HF,_EqKey,_Alloc>& __hm1, const hash_multimap<_Key,_Tp,_HF,_EqKey,_Alloc>& __hm2); template <class _Key, class _Tp, class _HashFcn, class _EqualKey, class _Alloc> class hash_multimap { // concept requirements __glibcpp_class_requires(_Key, _SGIAssignableConcept); __glibcpp_class_requires(_Tp, _SGIAssignableConcept); __glibcpp_class_requires3(_HashFcn, size_t, _Key, _UnaryFunctionConcept); __glibcpp_class_requires3(_EqualKey, _Key, _Key, _BinaryPredicateConcept); private: typedef hashtable<pair<const _Key, _Tp>, _Key, _HashFcn, _Select1st<pair<const _Key, _Tp> >, _EqualKey, _Alloc> _Ht; _Ht _M_ht; public: typedef typename _Ht::key_type key_type; typedef _Tp data_type; typedef _Tp mapped_type; typedef typename _Ht::value_type value_type; typedef typename _Ht::hasher hasher; typedef typename _Ht::key_equal key_equal; typedef typename _Ht::size_type size_type; typedef typename _Ht::difference_type difference_type; typedef typename _Ht::pointer pointer; typedef typename _Ht::const_pointer const_pointer; typedef typename _Ht::reference reference; typedef typename _Ht::const_reference const_reference; typedef typename _Ht::iterator iterator; typedef typename _Ht::const_iterator const_iterator; typedef typename _Ht::allocator_type allocator_type; hasher hash_funct() const { return _M_ht.hash_funct(); } key_equal key_eq() const { return _M_ht.key_eq(); } allocator_type get_allocator() const { return _M_ht.get_allocator(); } public: hash_multimap() : _M_ht(100, hasher(), key_equal(), allocator_type()) {} explicit hash_multimap(size_type __n) : _M_ht(__n, hasher(), key_equal(), allocator_type()) {} hash_multimap(size_type __n, const hasher& __hf) : _M_ht(__n, __hf, key_equal(), allocator_type()) {} hash_multimap(size_type __n, const hasher& __hf, const key_equal& __eql, const allocator_type& __a = allocator_type()) : _M_ht(__n, __hf, __eql, __a) {} template <class _InputIterator> hash_multimap(_InputIterator __f, _InputIterator __l) : _M_ht(100, hasher(), key_equal(), allocator_type()) { _M_ht.insert_equal(__f, __l); } template <class _InputIterator> hash_multimap(_InputIterator __f, _InputIterator __l, size_type __n) : _M_ht(__n, hasher(), key_equal(), allocator_type()) { _M_ht.insert_equal(__f, __l); } template <class _InputIterator> hash_multimap(_InputIterator __f, _InputIterator __l, size_type __n, const hasher& __hf) : _M_ht(__n, __hf, key_equal(), allocator_type()) { _M_ht.insert_equal(__f, __l); } template <class _InputIterator> hash_multimap(_InputIterator __f, _InputIterator __l, size_type __n, const hasher& __hf, const key_equal& __eql, const allocator_type& __a = allocator_type()) : _M_ht(__n, __hf, __eql, __a) { _M_ht.insert_equal(__f, __l); } public: size_type size() const { return _M_ht.size(); } size_type max_size() const { return _M_ht.max_size(); } bool empty() const { return _M_ht.empty(); } void swap(hash_multimap& __hs) { _M_ht.swap(__hs._M_ht); } template <class _K1, class _T1, class _HF, class _EqK, class _Al> friend bool operator== (const hash_multimap<_K1, _T1, _HF, _EqK, _Al>&, const hash_multimap<_K1, _T1, _HF, _EqK, _Al>&); iterator begin() { return _M_ht.begin(); } iterator end() { return _M_ht.end(); } const_iterator begin() const { return _M_ht.begin(); } const_iterator end() const { return _M_ht.end(); } public: iterator insert(const value_type& __obj) { return _M_ht.insert_equal(__obj); } template <class _InputIterator> void insert(_InputIterator __f, _InputIterator __l) { _M_ht.insert_equal(__f,__l); } iterator insert_noresize(const value_type& __obj) { return _M_ht.insert_equal_noresize(__obj); } iterator find(const key_type& __key) { return _M_ht.find(__key); } const_iterator find(const key_type& __key) const { return _M_ht.find(__key); } size_type count(const key_type& __key) const { return _M_ht.count(__key); } pair<iterator, iterator> equal_range(const key_type& __key) { return _M_ht.equal_range(__key); } pair<const_iterator, const_iterator> equal_range(const key_type& __key) const { return _M_ht.equal_range(__key); } size_type erase(const key_type& __key) {return _M_ht.erase(__key); } void erase(iterator __it) { _M_ht.erase(__it); } void erase(iterator __f, iterator __l) { _M_ht.erase(__f, __l); } void clear() { _M_ht.clear(); } public: void resize(size_type __hint) { _M_ht.resize(__hint); } size_type bucket_count() const { return _M_ht.bucket_count(); } size_type max_bucket_count() const { return _M_ht.max_bucket_count(); } size_type elems_in_bucket(size_type __n) const { return _M_ht.elems_in_bucket(__n); } }; template <class _Key, class _Tp, class _HF, class _EqKey, class _Alloc> inline bool operator==(const hash_multimap<_Key,_Tp,_HF,_EqKey,_Alloc>& __hm1, const hash_multimap<_Key,_Tp,_HF,_EqKey,_Alloc>& __hm2) { return __hm1._M_ht == __hm2._M_ht; } template <class _Key, class _Tp, class _HF, class _EqKey, class _Alloc> inline bool operator!=(const hash_multimap<_Key,_Tp,_HF,_EqKey,_Alloc>& __hm1, const hash_multimap<_Key,_Tp,_HF,_EqKey,_Alloc>& __hm2) { return !(__hm1 == __hm2); } template <class _Key, class _Tp, class _HashFcn, class _EqlKey, class _Alloc> inline void swap(hash_multimap<_Key,_Tp,_HashFcn,_EqlKey,_Alloc>& __hm1, hash_multimap<_Key,_Tp,_HashFcn,_EqlKey,_Alloc>& __hm2) { __hm1.swap(__hm2); } // Specialization of insert_iterator so that it will work for hash_map // and hash_multimap. template <class _Key, class _Tp, class _HashFn, class _EqKey, class _Alloc> class insert_iterator<hash_map<_Key, _Tp, _HashFn, _EqKey, _Alloc> > { protected: typedef hash_map<_Key, _Tp, _HashFn, _EqKey, _Alloc> _Container; _Container* container; public: typedef _Container container_type; typedef output_iterator_tag iterator_category; typedef void value_type; typedef void difference_type; typedef void pointer; typedef void reference; insert_iterator(_Container& __x) : container(&__x) {} insert_iterator(_Container& __x, typename _Container::iterator) : container(&__x) {} insert_iterator<_Container>& operator=(const typename _Container::value_type& __value) { container->insert(__value); return *this; } insert_iterator<_Container>& operator*() { return *this; } insert_iterator<_Container>& operator++() { return *this; } insert_iterator<_Container>& operator++(int) { return *this; } }; template <class _Key, class _Tp, class _HashFn, class _EqKey, class _Alloc> class insert_iterator<hash_multimap<_Key, _Tp, _HashFn, _EqKey, _Alloc> > { protected: typedef hash_multimap<_Key, _Tp, _HashFn, _EqKey, _Alloc> _Container; _Container* container; typename _Container::iterator iter; public: typedef _Container container_type; typedef output_iterator_tag iterator_category; typedef void value_type; typedef void difference_type; typedef void pointer; typedef void reference; insert_iterator(_Container& __x) : container(&__x) {} insert_iterator(_Container& __x, typename _Container::iterator) : container(&__x) {} insert_iterator<_Container>& operator=(const typename _Container::value_type& __value) { container->insert(__value); return *this; } insert_iterator<_Container>& operator*() { return *this; } insert_iterator<_Container>& operator++() { return *this; } insert_iterator<_Container>& operator++(int) { return *this; } }; } // namespace std #endif /* __SGI_STL_INTERNAL_HASH_MAP_H */ // Local Variables: // mode:C++ // End: