| // Hashtable implementation used by containers -*- C++ -*- |
| |
| // Copyright (C) 2001-2016 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 3, 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. |
| |
| // Under Section 7 of GPL version 3, you are granted additional |
| // permissions described in the GCC Runtime Library Exception, version |
| // 3.1, as published by the Free Software Foundation. |
| |
| // You should have received a copy of the GNU General Public License and |
| // a copy of the GCC Runtime Library Exception along with this program; |
| // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| // <http://www.gnu.org/licenses/>. |
| |
| /* |
| * Copyright (c) 1996,1997 |
| * 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. |
| * |
| */ |
| |
| /** @file backward/hashtable.h |
| * This file is a GNU extension to the Standard C++ Library (possibly |
| * containing extensions from the HP/SGI STL subset). |
| */ |
| |
| #ifndef _BACKWARD_HASHTABLE_H |
| #define _BACKWARD_HASHTABLE_H 1 |
| |
| // Hashtable class, used to implement the hashed associative containers |
| // hash_set, hash_map, hash_multiset, and hash_multimap. |
| |
| #include <vector> |
| #include <iterator> |
| #include <algorithm> |
| #include <bits/stl_function.h> |
| #include <backward/hash_fun.h> |
| |
| namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| using std::size_t; |
| using std::ptrdiff_t; |
| using std::forward_iterator_tag; |
| using std::input_iterator_tag; |
| using std::_Construct; |
| using std::_Destroy; |
| using std::distance; |
| using std::vector; |
| using std::pair; |
| using std::__iterator_category; |
| |
| template<class _Val> |
| struct _Hashtable_node |
| { |
| _Hashtable_node* _M_next; |
| _Val _M_val; |
| }; |
| |
| template<class _Val, class _Key, class _HashFcn, class _ExtractKey, |
| class _EqualKey, class _Alloc = std::allocator<_Val> > |
| class hashtable; |
| |
| template<class _Val, class _Key, class _HashFcn, |
| class _ExtractKey, class _EqualKey, class _Alloc> |
| struct _Hashtable_iterator; |
| |
| template<class _Val, class _Key, class _HashFcn, |
| class _ExtractKey, class _EqualKey, class _Alloc> |
| struct _Hashtable_const_iterator; |
| |
| template<class _Val, class _Key, class _HashFcn, |
| class _ExtractKey, class _EqualKey, class _Alloc> |
| struct _Hashtable_iterator |
| { |
| typedef hashtable<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc> |
| _Hashtable; |
| typedef _Hashtable_iterator<_Val, _Key, _HashFcn, |
| _ExtractKey, _EqualKey, _Alloc> |
| iterator; |
| typedef _Hashtable_const_iterator<_Val, _Key, _HashFcn, |
| _ExtractKey, _EqualKey, _Alloc> |
| const_iterator; |
| typedef _Hashtable_node<_Val> _Node; |
| typedef forward_iterator_tag iterator_category; |
| typedef _Val value_type; |
| typedef ptrdiff_t difference_type; |
| typedef size_t size_type; |
| typedef _Val& reference; |
| typedef _Val* pointer; |
| |
| _Node* _M_cur; |
| _Hashtable* _M_ht; |
| |
| _Hashtable_iterator(_Node* __n, _Hashtable* __tab) |
| : _M_cur(__n), _M_ht(__tab) { } |
| |
| _Hashtable_iterator() { } |
| |
| reference |
| operator*() const |
| { return _M_cur->_M_val; } |
| |
| pointer |
| operator->() const |
| { return &(operator*()); } |
| |
| iterator& |
| operator++(); |
| |
| iterator |
| operator++(int); |
| |
| bool |
| operator==(const iterator& __it) const |
| { return _M_cur == __it._M_cur; } |
| |
| bool |
| operator!=(const iterator& __it) const |
| { return _M_cur != __it._M_cur; } |
| }; |
| |
| template<class _Val, class _Key, class _HashFcn, |
| class _ExtractKey, class _EqualKey, class _Alloc> |
| struct _Hashtable_const_iterator |
| { |
| typedef hashtable<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc> |
| _Hashtable; |
| typedef _Hashtable_iterator<_Val,_Key,_HashFcn, |
| _ExtractKey,_EqualKey,_Alloc> |
| iterator; |
| typedef _Hashtable_const_iterator<_Val, _Key, _HashFcn, |
| _ExtractKey, _EqualKey, _Alloc> |
| const_iterator; |
| typedef _Hashtable_node<_Val> _Node; |
| |
| typedef forward_iterator_tag iterator_category; |
| typedef _Val value_type; |
| typedef ptrdiff_t difference_type; |
| typedef size_t size_type; |
| typedef const _Val& reference; |
| typedef const _Val* pointer; |
| |
| const _Node* _M_cur; |
| const _Hashtable* _M_ht; |
| |
| _Hashtable_const_iterator(const _Node* __n, const _Hashtable* __tab) |
| : _M_cur(__n), _M_ht(__tab) { } |
| |
| _Hashtable_const_iterator() { } |
| |
| _Hashtable_const_iterator(const iterator& __it) |
| : _M_cur(__it._M_cur), _M_ht(__it._M_ht) { } |
| |
| reference |
| operator*() const |
| { return _M_cur->_M_val; } |
| |
| pointer |
| operator->() const |
| { return &(operator*()); } |
| |
| const_iterator& |
| operator++(); |
| |
| const_iterator |
| operator++(int); |
| |
| bool |
| operator==(const const_iterator& __it) const |
| { return _M_cur == __it._M_cur; } |
| |
| bool |
| operator!=(const const_iterator& __it) const |
| { return _M_cur != __it._M_cur; } |
| }; |
| |
| // Note: assumes long is at least 32 bits. |
| enum { _S_num_primes = 29 }; |
| |
| template<typename _PrimeType> |
| struct _Hashtable_prime_list |
| { |
| static const _PrimeType __stl_prime_list[_S_num_primes]; |
| |
| static const _PrimeType* |
| _S_get_prime_list(); |
| }; |
| |
| template<typename _PrimeType> const _PrimeType |
| _Hashtable_prime_list<_PrimeType>::__stl_prime_list[_S_num_primes] = |
| { |
| 5ul, 53ul, 97ul, 193ul, 389ul, |
| 769ul, 1543ul, 3079ul, 6151ul, 12289ul, |
| 24593ul, 49157ul, 98317ul, 196613ul, 393241ul, |
| 786433ul, 1572869ul, 3145739ul, 6291469ul, 12582917ul, |
| 25165843ul, 50331653ul, 100663319ul, 201326611ul, 402653189ul, |
| 805306457ul, 1610612741ul, 3221225473ul, 4294967291ul |
| }; |
| |
| template<class _PrimeType> inline const _PrimeType* |
| _Hashtable_prime_list<_PrimeType>::_S_get_prime_list() |
| { |
| return __stl_prime_list; |
| } |
| |
| inline unsigned long |
| __stl_next_prime(unsigned long __n) |
| { |
| const unsigned long* __first = _Hashtable_prime_list<unsigned long>::_S_get_prime_list(); |
| const unsigned long* __last = __first + (int)_S_num_primes; |
| const unsigned long* pos = std::lower_bound(__first, __last, __n); |
| return pos == __last ? *(__last - 1) : *pos; |
| } |
| |
| // Forward declaration of operator==. |
| template<class _Val, class _Key, class _HF, class _Ex, |
| class _Eq, class _All> |
| class hashtable; |
| |
| template<class _Val, class _Key, class _HF, class _Ex, |
| class _Eq, class _All> |
| bool |
| operator==(const hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>& __ht1, |
| const hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>& __ht2); |
| |
| // Hashtables handle allocators a bit differently than other |
| // containers do. If we're using standard-conforming allocators, then |
| // a hashtable unconditionally has a member variable to hold its |
| // allocator, even if it so happens that all instances of the |
| // allocator type are identical. This is because, for hashtables, |
| // this extra storage is negligible. Additionally, a base class |
| // wouldn't serve any other purposes; it wouldn't, for example, |
| // simplify the exception-handling code. |
| template<class _Val, class _Key, class _HashFcn, |
| class _ExtractKey, class _EqualKey, class _Alloc> |
| class hashtable |
| { |
| public: |
| typedef _Key key_type; |
| typedef _Val value_type; |
| typedef _HashFcn hasher; |
| typedef _EqualKey key_equal; |
| |
| typedef size_t size_type; |
| typedef ptrdiff_t difference_type; |
| typedef value_type* pointer; |
| typedef const value_type* const_pointer; |
| typedef value_type& reference; |
| typedef const value_type& const_reference; |
| |
| hasher |
| hash_funct() const |
| { return _M_hash; } |
| |
| key_equal |
| key_eq() const |
| { return _M_equals; } |
| |
| private: |
| typedef _Hashtable_node<_Val> _Node; |
| |
| public: |
| typedef typename _Alloc::template rebind<value_type>::other allocator_type; |
| allocator_type |
| get_allocator() const |
| { return _M_node_allocator; } |
| |
| private: |
| typedef typename _Alloc::template rebind<_Node>::other _Node_Alloc; |
| typedef typename _Alloc::template rebind<_Node*>::other _Nodeptr_Alloc; |
| typedef vector<_Node*, _Nodeptr_Alloc> _Vector_type; |
| |
| _Node_Alloc _M_node_allocator; |
| |
| _Node* |
| _M_get_node() |
| { return _M_node_allocator.allocate(1); } |
| |
| void |
| _M_put_node(_Node* __p) |
| { _M_node_allocator.deallocate(__p, 1); } |
| |
| private: |
| hasher _M_hash; |
| key_equal _M_equals; |
| _ExtractKey _M_get_key; |
| _Vector_type _M_buckets; |
| size_type _M_num_elements; |
| |
| public: |
| typedef _Hashtable_iterator<_Val, _Key, _HashFcn, _ExtractKey, |
| _EqualKey, _Alloc> |
| iterator; |
| typedef _Hashtable_const_iterator<_Val, _Key, _HashFcn, _ExtractKey, |
| _EqualKey, _Alloc> |
| const_iterator; |
| |
| friend struct |
| _Hashtable_iterator<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc>; |
| |
| friend struct |
| _Hashtable_const_iterator<_Val, _Key, _HashFcn, _ExtractKey, |
| _EqualKey, _Alloc>; |
| |
| public: |
| hashtable(size_type __n, const _HashFcn& __hf, |
| const _EqualKey& __eql, const _ExtractKey& __ext, |
| const allocator_type& __a = allocator_type()) |
| : _M_node_allocator(__a), _M_hash(__hf), _M_equals(__eql), |
| _M_get_key(__ext), _M_buckets(__a), _M_num_elements(0) |
| { _M_initialize_buckets(__n); } |
| |
| hashtable(size_type __n, const _HashFcn& __hf, |
| const _EqualKey& __eql, |
| const allocator_type& __a = allocator_type()) |
| : _M_node_allocator(__a), _M_hash(__hf), _M_equals(__eql), |
| _M_get_key(_ExtractKey()), _M_buckets(__a), _M_num_elements(0) |
| { _M_initialize_buckets(__n); } |
| |
| hashtable(const hashtable& __ht) |
| : _M_node_allocator(__ht.get_allocator()), _M_hash(__ht._M_hash), |
| _M_equals(__ht._M_equals), _M_get_key(__ht._M_get_key), |
| _M_buckets(__ht.get_allocator()), _M_num_elements(0) |
| { _M_copy_from(__ht); } |
| |
| hashtable& |
| operator= (const hashtable& __ht) |
| { |
| if (&__ht != this) |
| { |
| clear(); |
| _M_hash = __ht._M_hash; |
| _M_equals = __ht._M_equals; |
| _M_get_key = __ht._M_get_key; |
| _M_copy_from(__ht); |
| } |
| return *this; |
| } |
| |
| ~hashtable() |
| { clear(); } |
| |
| size_type |
| size() const |
| { return _M_num_elements; } |
| |
| size_type |
| max_size() const |
| { return size_type(-1); } |
| |
| bool |
| empty() const |
| { return size() == 0; } |
| |
| void |
| swap(hashtable& __ht) |
| { |
| std::swap(_M_hash, __ht._M_hash); |
| std::swap(_M_equals, __ht._M_equals); |
| std::swap(_M_get_key, __ht._M_get_key); |
| _M_buckets.swap(__ht._M_buckets); |
| std::swap(_M_num_elements, __ht._M_num_elements); |
| } |
| |
| iterator |
| begin() |
| { |
| for (size_type __n = 0; __n < _M_buckets.size(); ++__n) |
| if (_M_buckets[__n]) |
| return iterator(_M_buckets[__n], this); |
| return end(); |
| } |
| |
| iterator |
| end() |
| { return iterator(0, this); } |
| |
| const_iterator |
| begin() const |
| { |
| for (size_type __n = 0; __n < _M_buckets.size(); ++__n) |
| if (_M_buckets[__n]) |
| return const_iterator(_M_buckets[__n], this); |
| return end(); |
| } |
| |
| const_iterator |
| end() const |
| { return const_iterator(0, this); } |
| |
| template<class _Vl, class _Ky, class _HF, class _Ex, class _Eq, |
| class _Al> |
| friend bool |
| operator==(const hashtable<_Vl, _Ky, _HF, _Ex, _Eq, _Al>&, |
| const hashtable<_Vl, _Ky, _HF, _Ex, _Eq, _Al>&); |
| |
| public: |
| size_type |
| bucket_count() const |
| { return _M_buckets.size(); } |
| |
| size_type |
| max_bucket_count() const |
| { return _Hashtable_prime_list<unsigned long>:: |
| _S_get_prime_list()[(int)_S_num_primes - 1]; |
| } |
| |
| size_type |
| elems_in_bucket(size_type __bucket) const |
| { |
| size_type __result = 0; |
| for (_Node* __n = _M_buckets[__bucket]; __n; __n = __n->_M_next) |
| __result += 1; |
| return __result; |
| } |
| |
| pair<iterator, bool> |
| insert_unique(const value_type& __obj) |
| { |
| resize(_M_num_elements + 1); |
| return insert_unique_noresize(__obj); |
| } |
| |
| iterator |
| insert_equal(const value_type& __obj) |
| { |
| resize(_M_num_elements + 1); |
| return insert_equal_noresize(__obj); |
| } |
| |
| pair<iterator, bool> |
| insert_unique_noresize(const value_type& __obj); |
| |
| iterator |
| insert_equal_noresize(const value_type& __obj); |
| |
| template<class _InputIterator> |
| void |
| insert_unique(_InputIterator __f, _InputIterator __l) |
| { insert_unique(__f, __l, __iterator_category(__f)); } |
| |
| template<class _InputIterator> |
| void |
| insert_equal(_InputIterator __f, _InputIterator __l) |
| { insert_equal(__f, __l, __iterator_category(__f)); } |
| |
| template<class _InputIterator> |
| void |
| insert_unique(_InputIterator __f, _InputIterator __l, |
| input_iterator_tag) |
| { |
| for ( ; __f != __l; ++__f) |
| insert_unique(*__f); |
| } |
| |
| template<class _InputIterator> |
| void |
| insert_equal(_InputIterator __f, _InputIterator __l, |
| input_iterator_tag) |
| { |
| for ( ; __f != __l; ++__f) |
| insert_equal(*__f); |
| } |
| |
| template<class _ForwardIterator> |
| void |
| insert_unique(_ForwardIterator __f, _ForwardIterator __l, |
| forward_iterator_tag) |
| { |
| size_type __n = distance(__f, __l); |
| resize(_M_num_elements + __n); |
| for ( ; __n > 0; --__n, ++__f) |
| insert_unique_noresize(*__f); |
| } |
| |
| template<class _ForwardIterator> |
| void |
| insert_equal(_ForwardIterator __f, _ForwardIterator __l, |
| forward_iterator_tag) |
| { |
| size_type __n = distance(__f, __l); |
| resize(_M_num_elements + __n); |
| for ( ; __n > 0; --__n, ++__f) |
| insert_equal_noresize(*__f); |
| } |
| |
| reference |
| find_or_insert(const value_type& __obj); |
| |
| iterator |
| find(const key_type& __key) |
| { |
| size_type __n = _M_bkt_num_key(__key); |
| _Node* __first; |
| for (__first = _M_buckets[__n]; |
| __first && !_M_equals(_M_get_key(__first->_M_val), __key); |
| __first = __first->_M_next) |
| { } |
| return iterator(__first, this); |
| } |
| |
| const_iterator |
| find(const key_type& __key) const |
| { |
| size_type __n = _M_bkt_num_key(__key); |
| const _Node* __first; |
| for (__first = _M_buckets[__n]; |
| __first && !_M_equals(_M_get_key(__first->_M_val), __key); |
| __first = __first->_M_next) |
| { } |
| return const_iterator(__first, this); |
| } |
| |
| size_type |
| count(const key_type& __key) const |
| { |
| const size_type __n = _M_bkt_num_key(__key); |
| size_type __result = 0; |
| |
| for (const _Node* __cur = _M_buckets[__n]; __cur; |
| __cur = __cur->_M_next) |
| if (_M_equals(_M_get_key(__cur->_M_val), __key)) |
| ++__result; |
| return __result; |
| } |
| |
| pair<iterator, iterator> |
| equal_range(const key_type& __key); |
| |
| pair<const_iterator, const_iterator> |
| equal_range(const key_type& __key) const; |
| |
| size_type |
| erase(const key_type& __key); |
| |
| void |
| erase(const iterator& __it); |
| |
| void |
| erase(iterator __first, iterator __last); |
| |
| void |
| erase(const const_iterator& __it); |
| |
| void |
| erase(const_iterator __first, const_iterator __last); |
| |
| void |
| resize(size_type __num_elements_hint); |
| |
| void |
| clear(); |
| |
| private: |
| size_type |
| _M_next_size(size_type __n) const |
| { return __stl_next_prime(__n); } |
| |
| void |
| _M_initialize_buckets(size_type __n) |
| { |
| const size_type __n_buckets = _M_next_size(__n); |
| _M_buckets.reserve(__n_buckets); |
| _M_buckets.insert(_M_buckets.end(), __n_buckets, (_Node*) 0); |
| _M_num_elements = 0; |
| } |
| |
| size_type |
| _M_bkt_num_key(const key_type& __key) const |
| { return _M_bkt_num_key(__key, _M_buckets.size()); } |
| |
| size_type |
| _M_bkt_num(const value_type& __obj) const |
| { return _M_bkt_num_key(_M_get_key(__obj)); } |
| |
| size_type |
| _M_bkt_num_key(const key_type& __key, size_t __n) const |
| { return _M_hash(__key) % __n; } |
| |
| size_type |
| _M_bkt_num(const value_type& __obj, size_t __n) const |
| { return _M_bkt_num_key(_M_get_key(__obj), __n); } |
| |
| _Node* |
| _M_new_node(const value_type& __obj) |
| { |
| _Node* __n = _M_get_node(); |
| __n->_M_next = 0; |
| __try |
| { |
| this->get_allocator().construct(&__n->_M_val, __obj); |
| return __n; |
| } |
| __catch(...) |
| { |
| _M_put_node(__n); |
| __throw_exception_again; |
| } |
| } |
| |
| void |
| _M_delete_node(_Node* __n) |
| { |
| this->get_allocator().destroy(&__n->_M_val); |
| _M_put_node(__n); |
| } |
| |
| void |
| _M_erase_bucket(const size_type __n, _Node* __first, _Node* __last); |
| |
| void |
| _M_erase_bucket(const size_type __n, _Node* __last); |
| |
| void |
| _M_copy_from(const hashtable& __ht); |
| }; |
| |
| template<class _Val, class _Key, class _HF, class _ExK, class _EqK, |
| class _All> |
| _Hashtable_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>& |
| _Hashtable_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>:: |
| operator++() |
| { |
| const _Node* __old = _M_cur; |
| _M_cur = _M_cur->_M_next; |
| if (!_M_cur) |
| { |
| size_type __bucket = _M_ht->_M_bkt_num(__old->_M_val); |
| while (!_M_cur && ++__bucket < _M_ht->_M_buckets.size()) |
| _M_cur = _M_ht->_M_buckets[__bucket]; |
| } |
| return *this; |
| } |
| |
| template<class _Val, class _Key, class _HF, class _ExK, class _EqK, |
| class _All> |
| inline _Hashtable_iterator<_Val, _Key, _HF, _ExK, _EqK, _All> |
| _Hashtable_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>:: |
| operator++(int) |
| { |
| iterator __tmp = *this; |
| ++*this; |
| return __tmp; |
| } |
| |
| template<class _Val, class _Key, class _HF, class _ExK, class _EqK, |
| class _All> |
| _Hashtable_const_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>& |
| _Hashtable_const_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>:: |
| operator++() |
| { |
| const _Node* __old = _M_cur; |
| _M_cur = _M_cur->_M_next; |
| if (!_M_cur) |
| { |
| size_type __bucket = _M_ht->_M_bkt_num(__old->_M_val); |
| while (!_M_cur && ++__bucket < _M_ht->_M_buckets.size()) |
| _M_cur = _M_ht->_M_buckets[__bucket]; |
| } |
| return *this; |
| } |
| |
| template<class _Val, class _Key, class _HF, class _ExK, class _EqK, |
| class _All> |
| inline _Hashtable_const_iterator<_Val, _Key, _HF, _ExK, _EqK, _All> |
| _Hashtable_const_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>:: |
| operator++(int) |
| { |
| const_iterator __tmp = *this; |
| ++*this; |
| return __tmp; |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| bool |
| operator==(const hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>& __ht1, |
| const hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>& __ht2) |
| { |
| typedef typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::_Node _Node; |
| |
| if (__ht1._M_buckets.size() != __ht2._M_buckets.size()) |
| return false; |
| |
| for (size_t __n = 0; __n < __ht1._M_buckets.size(); ++__n) |
| { |
| _Node* __cur1 = __ht1._M_buckets[__n]; |
| _Node* __cur2 = __ht2._M_buckets[__n]; |
| // Check same length of lists |
| for (; __cur1 && __cur2; |
| __cur1 = __cur1->_M_next, __cur2 = __cur2->_M_next) |
| { } |
| if (__cur1 || __cur2) |
| return false; |
| // Now check one's elements are in the other |
| for (__cur1 = __ht1._M_buckets[__n] ; __cur1; |
| __cur1 = __cur1->_M_next) |
| { |
| bool _found__cur1 = false; |
| for (__cur2 = __ht2._M_buckets[__n]; |
| __cur2; __cur2 = __cur2->_M_next) |
| { |
| if (__cur1->_M_val == __cur2->_M_val) |
| { |
| _found__cur1 = true; |
| break; |
| } |
| } |
| if (!_found__cur1) |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| inline bool |
| operator!=(const hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>& __ht1, |
| const hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>& __ht2) |
| { return !(__ht1 == __ht2); } |
| |
| template<class _Val, class _Key, class _HF, class _Extract, class _EqKey, |
| class _All> |
| inline void |
| swap(hashtable<_Val, _Key, _HF, _Extract, _EqKey, _All>& __ht1, |
| hashtable<_Val, _Key, _HF, _Extract, _EqKey, _All>& __ht2) |
| { __ht1.swap(__ht2); } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| pair<typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::iterator, bool> |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| insert_unique_noresize(const value_type& __obj) |
| { |
| const size_type __n = _M_bkt_num(__obj); |
| _Node* __first = _M_buckets[__n]; |
| |
| for (_Node* __cur = __first; __cur; __cur = __cur->_M_next) |
| if (_M_equals(_M_get_key(__cur->_M_val), _M_get_key(__obj))) |
| return pair<iterator, bool>(iterator(__cur, this), false); |
| |
| _Node* __tmp = _M_new_node(__obj); |
| __tmp->_M_next = __first; |
| _M_buckets[__n] = __tmp; |
| ++_M_num_elements; |
| return pair<iterator, bool>(iterator(__tmp, this), true); |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::iterator |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| insert_equal_noresize(const value_type& __obj) |
| { |
| const size_type __n = _M_bkt_num(__obj); |
| _Node* __first = _M_buckets[__n]; |
| |
| for (_Node* __cur = __first; __cur; __cur = __cur->_M_next) |
| if (_M_equals(_M_get_key(__cur->_M_val), _M_get_key(__obj))) |
| { |
| _Node* __tmp = _M_new_node(__obj); |
| __tmp->_M_next = __cur->_M_next; |
| __cur->_M_next = __tmp; |
| ++_M_num_elements; |
| return iterator(__tmp, this); |
| } |
| |
| _Node* __tmp = _M_new_node(__obj); |
| __tmp->_M_next = __first; |
| _M_buckets[__n] = __tmp; |
| ++_M_num_elements; |
| return iterator(__tmp, this); |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::reference |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| find_or_insert(const value_type& __obj) |
| { |
| resize(_M_num_elements + 1); |
| |
| size_type __n = _M_bkt_num(__obj); |
| _Node* __first = _M_buckets[__n]; |
| |
| for (_Node* __cur = __first; __cur; __cur = __cur->_M_next) |
| if (_M_equals(_M_get_key(__cur->_M_val), _M_get_key(__obj))) |
| return __cur->_M_val; |
| |
| _Node* __tmp = _M_new_node(__obj); |
| __tmp->_M_next = __first; |
| _M_buckets[__n] = __tmp; |
| ++_M_num_elements; |
| return __tmp->_M_val; |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| pair<typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::iterator, |
| typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::iterator> |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| equal_range(const key_type& __key) |
| { |
| typedef pair<iterator, iterator> _Pii; |
| const size_type __n = _M_bkt_num_key(__key); |
| |
| for (_Node* __first = _M_buckets[__n]; __first; |
| __first = __first->_M_next) |
| if (_M_equals(_M_get_key(__first->_M_val), __key)) |
| { |
| for (_Node* __cur = __first->_M_next; __cur; |
| __cur = __cur->_M_next) |
| if (!_M_equals(_M_get_key(__cur->_M_val), __key)) |
| return _Pii(iterator(__first, this), iterator(__cur, this)); |
| for (size_type __m = __n + 1; __m < _M_buckets.size(); ++__m) |
| if (_M_buckets[__m]) |
| return _Pii(iterator(__first, this), |
| iterator(_M_buckets[__m], this)); |
| return _Pii(iterator(__first, this), end()); |
| } |
| return _Pii(end(), end()); |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| pair<typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::const_iterator, |
| typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::const_iterator> |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| equal_range(const key_type& __key) const |
| { |
| typedef pair<const_iterator, const_iterator> _Pii; |
| const size_type __n = _M_bkt_num_key(__key); |
| |
| for (const _Node* __first = _M_buckets[__n]; __first; |
| __first = __first->_M_next) |
| { |
| if (_M_equals(_M_get_key(__first->_M_val), __key)) |
| { |
| for (const _Node* __cur = __first->_M_next; __cur; |
| __cur = __cur->_M_next) |
| if (!_M_equals(_M_get_key(__cur->_M_val), __key)) |
| return _Pii(const_iterator(__first, this), |
| const_iterator(__cur, this)); |
| for (size_type __m = __n + 1; __m < _M_buckets.size(); ++__m) |
| if (_M_buckets[__m]) |
| return _Pii(const_iterator(__first, this), |
| const_iterator(_M_buckets[__m], this)); |
| return _Pii(const_iterator(__first, this), end()); |
| } |
| } |
| return _Pii(end(), end()); |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::size_type |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| erase(const key_type& __key) |
| { |
| const size_type __n = _M_bkt_num_key(__key); |
| _Node* __first = _M_buckets[__n]; |
| _Node* __saved_slot = 0; |
| size_type __erased = 0; |
| |
| if (__first) |
| { |
| _Node* __cur = __first; |
| _Node* __next = __cur->_M_next; |
| while (__next) |
| { |
| if (_M_equals(_M_get_key(__next->_M_val), __key)) |
| { |
| if (&_M_get_key(__next->_M_val) != &__key) |
| { |
| __cur->_M_next = __next->_M_next; |
| _M_delete_node(__next); |
| __next = __cur->_M_next; |
| ++__erased; |
| --_M_num_elements; |
| } |
| else |
| { |
| __saved_slot = __cur; |
| __cur = __next; |
| __next = __cur->_M_next; |
| } |
| } |
| else |
| { |
| __cur = __next; |
| __next = __cur->_M_next; |
| } |
| } |
| bool __delete_first = _M_equals(_M_get_key(__first->_M_val), __key); |
| if (__saved_slot) |
| { |
| __next = __saved_slot->_M_next; |
| __saved_slot->_M_next = __next->_M_next; |
| _M_delete_node(__next); |
| ++__erased; |
| --_M_num_elements; |
| } |
| if (__delete_first) |
| { |
| _M_buckets[__n] = __first->_M_next; |
| _M_delete_node(__first); |
| ++__erased; |
| --_M_num_elements; |
| } |
| } |
| return __erased; |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| void hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| erase(const iterator& __it) |
| { |
| _Node* __p = __it._M_cur; |
| if (__p) |
| { |
| const size_type __n = _M_bkt_num(__p->_M_val); |
| _Node* __cur = _M_buckets[__n]; |
| |
| if (__cur == __p) |
| { |
| _M_buckets[__n] = __cur->_M_next; |
| _M_delete_node(__cur); |
| --_M_num_elements; |
| } |
| else |
| { |
| _Node* __next = __cur->_M_next; |
| while (__next) |
| { |
| if (__next == __p) |
| { |
| __cur->_M_next = __next->_M_next; |
| _M_delete_node(__next); |
| --_M_num_elements; |
| break; |
| } |
| else |
| { |
| __cur = __next; |
| __next = __cur->_M_next; |
| } |
| } |
| } |
| } |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| void |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| erase(iterator __first, iterator __last) |
| { |
| size_type __f_bucket = __first._M_cur ? _M_bkt_num(__first._M_cur->_M_val) |
| : _M_buckets.size(); |
| |
| size_type __l_bucket = __last._M_cur ? _M_bkt_num(__last._M_cur->_M_val) |
| : _M_buckets.size(); |
| |
| if (__first._M_cur == __last._M_cur) |
| return; |
| else if (__f_bucket == __l_bucket) |
| _M_erase_bucket(__f_bucket, __first._M_cur, __last._M_cur); |
| else |
| { |
| _M_erase_bucket(__f_bucket, __first._M_cur, 0); |
| for (size_type __n = __f_bucket + 1; __n < __l_bucket; ++__n) |
| _M_erase_bucket(__n, 0); |
| if (__l_bucket != _M_buckets.size()) |
| _M_erase_bucket(__l_bucket, __last._M_cur); |
| } |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| inline void |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| erase(const_iterator __first, const_iterator __last) |
| { |
| erase(iterator(const_cast<_Node*>(__first._M_cur), |
| const_cast<hashtable*>(__first._M_ht)), |
| iterator(const_cast<_Node*>(__last._M_cur), |
| const_cast<hashtable*>(__last._M_ht))); |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| inline void |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| erase(const const_iterator& __it) |
| { erase(iterator(const_cast<_Node*>(__it._M_cur), |
| const_cast<hashtable*>(__it._M_ht))); } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| void |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| resize(size_type __num_elements_hint) |
| { |
| const size_type __old_n = _M_buckets.size(); |
| if (__num_elements_hint > __old_n) |
| { |
| const size_type __n = _M_next_size(__num_elements_hint); |
| if (__n > __old_n) |
| { |
| _Vector_type __tmp(__n, (_Node*)(0), _M_buckets.get_allocator()); |
| __try |
| { |
| for (size_type __bucket = 0; __bucket < __old_n; ++__bucket) |
| { |
| _Node* __first = _M_buckets[__bucket]; |
| while (__first) |
| { |
| size_type __new_bucket = _M_bkt_num(__first->_M_val, |
| __n); |
| _M_buckets[__bucket] = __first->_M_next; |
| __first->_M_next = __tmp[__new_bucket]; |
| __tmp[__new_bucket] = __first; |
| __first = _M_buckets[__bucket]; |
| } |
| } |
| _M_buckets.swap(__tmp); |
| } |
| __catch(...) |
| { |
| for (size_type __bucket = 0; __bucket < __tmp.size(); |
| ++__bucket) |
| { |
| while (__tmp[__bucket]) |
| { |
| _Node* __next = __tmp[__bucket]->_M_next; |
| _M_delete_node(__tmp[__bucket]); |
| __tmp[__bucket] = __next; |
| } |
| } |
| __throw_exception_again; |
| } |
| } |
| } |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| void |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| _M_erase_bucket(const size_type __n, _Node* __first, _Node* __last) |
| { |
| _Node* __cur = _M_buckets[__n]; |
| if (__cur == __first) |
| _M_erase_bucket(__n, __last); |
| else |
| { |
| _Node* __next; |
| for (__next = __cur->_M_next; |
| __next != __first; |
| __cur = __next, __next = __cur->_M_next) |
| ; |
| while (__next != __last) |
| { |
| __cur->_M_next = __next->_M_next; |
| _M_delete_node(__next); |
| __next = __cur->_M_next; |
| --_M_num_elements; |
| } |
| } |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| void |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| _M_erase_bucket(const size_type __n, _Node* __last) |
| { |
| _Node* __cur = _M_buckets[__n]; |
| while (__cur != __last) |
| { |
| _Node* __next = __cur->_M_next; |
| _M_delete_node(__cur); |
| __cur = __next; |
| _M_buckets[__n] = __cur; |
| --_M_num_elements; |
| } |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| void |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| clear() |
| { |
| if (_M_num_elements == 0) |
| return; |
| |
| for (size_type __i = 0; __i < _M_buckets.size(); ++__i) |
| { |
| _Node* __cur = _M_buckets[__i]; |
| while (__cur != 0) |
| { |
| _Node* __next = __cur->_M_next; |
| _M_delete_node(__cur); |
| __cur = __next; |
| } |
| _M_buckets[__i] = 0; |
| } |
| _M_num_elements = 0; |
| } |
| |
| template<class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All> |
| void |
| hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>:: |
| _M_copy_from(const hashtable& __ht) |
| { |
| _M_buckets.clear(); |
| _M_buckets.reserve(__ht._M_buckets.size()); |
| _M_buckets.insert(_M_buckets.end(), __ht._M_buckets.size(), (_Node*) 0); |
| __try |
| { |
| for (size_type __i = 0; __i < __ht._M_buckets.size(); ++__i) { |
| const _Node* __cur = __ht._M_buckets[__i]; |
| if (__cur) |
| { |
| _Node* __local_copy = _M_new_node(__cur->_M_val); |
| _M_buckets[__i] = __local_copy; |
| |
| for (_Node* __next = __cur->_M_next; |
| __next; |
| __cur = __next, __next = __cur->_M_next) |
| { |
| __local_copy->_M_next = _M_new_node(__next->_M_val); |
| __local_copy = __local_copy->_M_next; |
| } |
| } |
| } |
| _M_num_elements = __ht._M_num_elements; |
| } |
| __catch(...) |
| { |
| clear(); |
| __throw_exception_again; |
| } |
| } |
| |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } // namespace |
| |
| #endif |
