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| // -*- C++ -*- |
| |
| // Copyright (C) 2005-2013 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) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. |
| |
| // Permission to use, copy, modify, sell, and distribute this software |
| // is hereby granted without fee, provided that the above copyright |
| // notice appears in all copies, and that both that copyright notice |
| // and this permission notice appear in supporting documentation. None |
| // of the above authors, nor IBM Haifa Research Laboratories, make any |
| // representation about the suitability of this software for any |
| // purpose. It is provided "as is" without express or implied |
| // warranty. |
| |
| /** |
| * @file pairing_heap_/pairing_heap_.hpp |
| * Contains an implementation class for a pairing heap. |
| */ |
| |
| /* |
| * Pairing heap: |
| * Michael L. Fredman, Robert Sedgewick, Daniel Dominic Sleator, |
| * and Robert Endre Tarjan, The Pairing Heap: |
| * A New Form of Self-Adjusting Heap, Algorithmica, 1(1):111-129, 1986. |
| */ |
| |
| #include <ext/pb_ds/detail/cond_dealtor.hpp> |
| #include <ext/pb_ds/detail/type_utils.hpp> |
| #include <ext/pb_ds/detail/left_child_next_sibling_heap_/left_child_next_sibling_heap_.hpp> |
| #include <debug/debug.h> |
| |
| namespace __gnu_pbds |
| { |
| namespace detail |
| { |
| #define PB_DS_CLASS_T_DEC \ |
| template<typename Value_Type, typename Cmp_Fn, typename _Alloc> |
| |
| #define PB_DS_CLASS_C_DEC \ |
| pairing_heap<Value_Type, Cmp_Fn, _Alloc> |
| |
| #ifdef _GLIBCXX_DEBUG |
| #define PB_DS_P_HEAP_BASE \ |
| left_child_next_sibling_heap<Value_Type, Cmp_Fn, null_type, _Alloc, false> |
| #else |
| #define PB_DS_P_HEAP_BASE \ |
| left_child_next_sibling_heap<Value_Type, Cmp_Fn, null_type, _Alloc> |
| #endif |
| |
| /** |
| * Pairing heap. |
| * |
| * @ingroup heap-detail |
| */ |
| template<typename Value_Type, typename Cmp_Fn, typename _Alloc> |
| class pairing_heap : public PB_DS_P_HEAP_BASE |
| { |
| private: |
| typedef PB_DS_P_HEAP_BASE base_type; |
| typedef typename base_type::node_pointer node_pointer; |
| |
| typedef typename _Alloc::template rebind<Value_Type>::other __rebind_a; |
| |
| public: |
| typedef Value_Type value_type; |
| typedef Cmp_Fn cmp_fn; |
| typedef _Alloc allocator_type; |
| typedef typename _Alloc::size_type size_type; |
| typedef typename _Alloc::difference_type difference_type; |
| |
| typedef typename __rebind_a::pointer pointer; |
| typedef typename __rebind_a::const_pointer const_pointer; |
| typedef typename __rebind_a::reference reference; |
| typedef typename __rebind_a::const_reference const_reference; |
| |
| typedef typename base_type::point_const_iterator point_const_iterator; |
| typedef typename base_type::point_iterator point_iterator; |
| typedef typename base_type::const_iterator const_iterator; |
| typedef typename base_type::iterator iterator; |
| |
| pairing_heap(); |
| |
| pairing_heap(const Cmp_Fn&); |
| |
| pairing_heap(const pairing_heap&); |
| |
| void |
| swap(pairing_heap&); |
| |
| ~pairing_heap(); |
| |
| inline point_iterator |
| push(const_reference); |
| |
| void |
| modify(point_iterator, const_reference); |
| |
| inline const_reference |
| top() const; |
| |
| void |
| pop(); |
| |
| void |
| erase(point_iterator); |
| |
| template<typename Pred> |
| size_type |
| erase_if(Pred); |
| |
| template<typename Pred> |
| void |
| split(Pred, pairing_heap&); |
| |
| void |
| join(pairing_heap&); |
| |
| protected: |
| |
| template<typename It> |
| void |
| copy_from_range(It, It); |
| |
| #ifdef _GLIBCXX_DEBUG |
| void |
| assert_valid(const char*, int) const; |
| #endif |
| |
| private: |
| |
| inline void |
| push_imp(node_pointer); |
| |
| node_pointer |
| join_node_children(node_pointer); |
| |
| node_pointer |
| forward_join(node_pointer, node_pointer); |
| |
| node_pointer |
| back_join(node_pointer, node_pointer); |
| |
| void |
| remove_node(node_pointer); |
| }; |
| |
| #define PB_DS_ASSERT_NODE_CONSISTENT(_Node, _Bool) \ |
| _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(_Node, _Bool, \ |
| __FILE__, __LINE__);) |
| |
| #include <ext/pb_ds/detail/pairing_heap_/constructors_destructor_fn_imps.hpp> |
| #include <ext/pb_ds/detail/pairing_heap_/debug_fn_imps.hpp> |
| #include <ext/pb_ds/detail/pairing_heap_/find_fn_imps.hpp> |
| #include <ext/pb_ds/detail/pairing_heap_/insert_fn_imps.hpp> |
| #include <ext/pb_ds/detail/pairing_heap_/erase_fn_imps.hpp> |
| #include <ext/pb_ds/detail/pairing_heap_/split_join_fn_imps.hpp> |
| |
| #undef PB_DS_ASSERT_NODE_CONSISTENT |
| #undef PB_DS_CLASS_C_DEC |
| #undef PB_DS_CLASS_T_DEC |
| #undef PB_DS_P_HEAP_BASE |
| |
| } // namespace detail |
| } // namespace __gnu_pbds |