1*38fd1498Szrj // -*- C++ -*- 2*38fd1498Szrj 3*38fd1498Szrj // Copyright (C) 2005-2018 Free Software Foundation, Inc. 4*38fd1498Szrj // 5*38fd1498Szrj // This file is part of the GNU ISO C++ Library. This library is free 6*38fd1498Szrj // software; you can redistribute it and/or modify it under the terms 7*38fd1498Szrj // of the GNU General Public License as published by the Free Software 8*38fd1498Szrj // Foundation; either version 3, or (at your option) any later 9*38fd1498Szrj // version. 10*38fd1498Szrj 11*38fd1498Szrj // This library is distributed in the hope that it will be useful, but 12*38fd1498Szrj // WITHOUT ANY WARRANTY; without even the implied warranty of 13*38fd1498Szrj // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14*38fd1498Szrj // General Public License for more details. 15*38fd1498Szrj 16*38fd1498Szrj // Under Section 7 of GPL version 3, you are granted additional 17*38fd1498Szrj // permissions described in the GCC Runtime Library Exception, version 18*38fd1498Szrj // 3.1, as published by the Free Software Foundation. 19*38fd1498Szrj 20*38fd1498Szrj // You should have received a copy of the GNU General Public License and 21*38fd1498Szrj // a copy of the GCC Runtime Library Exception along with this program; 22*38fd1498Szrj // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23*38fd1498Szrj // <http://www.gnu.org/licenses/>. 24*38fd1498Szrj 25*38fd1498Szrj // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 26*38fd1498Szrj 27*38fd1498Szrj // Permission to use, copy, modify, sell, and distribute this software 28*38fd1498Szrj // is hereby granted without fee, provided that the above copyright 29*38fd1498Szrj // notice appears in all copies, and that both that copyright notice 30*38fd1498Szrj // and this permission notice appear in supporting documentation. None 31*38fd1498Szrj // of the above authors, nor IBM Haifa Research Laboratories, make any 32*38fd1498Szrj // representation about the suitability of this software for any 33*38fd1498Szrj // purpose. It is provided "as is" without express or implied 34*38fd1498Szrj // warranty. 35*38fd1498Szrj 36*38fd1498Szrj /** 37*38fd1498Szrj * @file pairing_heap_/pairing_heap_.hpp 38*38fd1498Szrj * Contains an implementation class for a pairing heap. 39*38fd1498Szrj */ 40*38fd1498Szrj 41*38fd1498Szrj /* 42*38fd1498Szrj * Pairing heap: 43*38fd1498Szrj * Michael L. Fredman, Robert Sedgewick, Daniel Dominic Sleator, 44*38fd1498Szrj * and Robert Endre Tarjan, The Pairing Heap: 45*38fd1498Szrj * A New Form of Self-Adjusting Heap, Algorithmica, 1(1):111-129, 1986. 46*38fd1498Szrj */ 47*38fd1498Szrj 48*38fd1498Szrj #include <ext/pb_ds/detail/cond_dealtor.hpp> 49*38fd1498Szrj #include <ext/pb_ds/detail/type_utils.hpp> 50*38fd1498Szrj #include <ext/pb_ds/detail/left_child_next_sibling_heap_/left_child_next_sibling_heap_.hpp> 51*38fd1498Szrj #include <debug/debug.h> 52*38fd1498Szrj 53*38fd1498Szrj namespace __gnu_pbds 54*38fd1498Szrj { 55*38fd1498Szrj namespace detail 56*38fd1498Szrj { 57*38fd1498Szrj #define PB_DS_CLASS_T_DEC \ 58*38fd1498Szrj template<typename Value_Type, typename Cmp_Fn, typename _Alloc> 59*38fd1498Szrj 60*38fd1498Szrj #define PB_DS_CLASS_C_DEC \ 61*38fd1498Szrj pairing_heap<Value_Type, Cmp_Fn, _Alloc> 62*38fd1498Szrj 63*38fd1498Szrj #ifdef _GLIBCXX_DEBUG 64*38fd1498Szrj #define PB_DS_P_HEAP_BASE \ 65*38fd1498Szrj left_child_next_sibling_heap<Value_Type, Cmp_Fn, null_type, _Alloc, false> 66*38fd1498Szrj #else 67*38fd1498Szrj #define PB_DS_P_HEAP_BASE \ 68*38fd1498Szrj left_child_next_sibling_heap<Value_Type, Cmp_Fn, null_type, _Alloc> 69*38fd1498Szrj #endif 70*38fd1498Szrj 71*38fd1498Szrj /** 72*38fd1498Szrj * Pairing heap. 73*38fd1498Szrj * 74*38fd1498Szrj * @ingroup heap-detail 75*38fd1498Szrj */ 76*38fd1498Szrj template<typename Value_Type, typename Cmp_Fn, typename _Alloc> 77*38fd1498Szrj class pairing_heap : public PB_DS_P_HEAP_BASE 78*38fd1498Szrj { 79*38fd1498Szrj private: 80*38fd1498Szrj typedef PB_DS_P_HEAP_BASE base_type; 81*38fd1498Szrj typedef typename base_type::node_pointer node_pointer; 82*38fd1498Szrj 83*38fd1498Szrj typedef typename _Alloc::template rebind<Value_Type>::other __rebind_a; 84*38fd1498Szrj 85*38fd1498Szrj public: 86*38fd1498Szrj typedef Value_Type value_type; 87*38fd1498Szrj typedef Cmp_Fn cmp_fn; 88*38fd1498Szrj typedef _Alloc allocator_type; 89*38fd1498Szrj typedef typename _Alloc::size_type size_type; 90*38fd1498Szrj typedef typename _Alloc::difference_type difference_type; 91*38fd1498Szrj 92*38fd1498Szrj typedef typename __rebind_a::pointer pointer; 93*38fd1498Szrj typedef typename __rebind_a::const_pointer const_pointer; 94*38fd1498Szrj typedef typename __rebind_a::reference reference; 95*38fd1498Szrj typedef typename __rebind_a::const_reference const_reference; 96*38fd1498Szrj 97*38fd1498Szrj typedef typename base_type::point_const_iterator point_const_iterator; 98*38fd1498Szrj typedef typename base_type::point_iterator point_iterator; 99*38fd1498Szrj typedef typename base_type::const_iterator const_iterator; 100*38fd1498Szrj typedef typename base_type::iterator iterator; 101*38fd1498Szrj 102*38fd1498Szrj pairing_heap(); 103*38fd1498Szrj 104*38fd1498Szrj pairing_heap(const Cmp_Fn&); 105*38fd1498Szrj 106*38fd1498Szrj pairing_heap(const pairing_heap&); 107*38fd1498Szrj 108*38fd1498Szrj void 109*38fd1498Szrj swap(pairing_heap&); 110*38fd1498Szrj 111*38fd1498Szrj ~pairing_heap(); 112*38fd1498Szrj 113*38fd1498Szrj inline point_iterator 114*38fd1498Szrj push(const_reference); 115*38fd1498Szrj 116*38fd1498Szrj void 117*38fd1498Szrj modify(point_iterator, const_reference); 118*38fd1498Szrj 119*38fd1498Szrj inline const_reference 120*38fd1498Szrj top() const; 121*38fd1498Szrj 122*38fd1498Szrj void 123*38fd1498Szrj pop(); 124*38fd1498Szrj 125*38fd1498Szrj void 126*38fd1498Szrj erase(point_iterator); 127*38fd1498Szrj 128*38fd1498Szrj template<typename Pred> 129*38fd1498Szrj size_type 130*38fd1498Szrj erase_if(Pred); 131*38fd1498Szrj 132*38fd1498Szrj template<typename Pred> 133*38fd1498Szrj void 134*38fd1498Szrj split(Pred, pairing_heap&); 135*38fd1498Szrj 136*38fd1498Szrj void 137*38fd1498Szrj join(pairing_heap&); 138*38fd1498Szrj 139*38fd1498Szrj protected: 140*38fd1498Szrj 141*38fd1498Szrj template<typename It> 142*38fd1498Szrj void 143*38fd1498Szrj copy_from_range(It, It); 144*38fd1498Szrj 145*38fd1498Szrj #ifdef _GLIBCXX_DEBUG 146*38fd1498Szrj void 147*38fd1498Szrj assert_valid(const char*, int) const; 148*38fd1498Szrj #endif 149*38fd1498Szrj 150*38fd1498Szrj private: 151*38fd1498Szrj 152*38fd1498Szrj inline void 153*38fd1498Szrj push_imp(node_pointer); 154*38fd1498Szrj 155*38fd1498Szrj node_pointer 156*38fd1498Szrj join_node_children(node_pointer); 157*38fd1498Szrj 158*38fd1498Szrj node_pointer 159*38fd1498Szrj forward_join(node_pointer, node_pointer); 160*38fd1498Szrj 161*38fd1498Szrj node_pointer 162*38fd1498Szrj back_join(node_pointer, node_pointer); 163*38fd1498Szrj 164*38fd1498Szrj void 165*38fd1498Szrj remove_node(node_pointer); 166*38fd1498Szrj }; 167*38fd1498Szrj 168*38fd1498Szrj #define PB_DS_ASSERT_NODE_CONSISTENT(_Node, _Bool) \ 169*38fd1498Szrj _GLIBCXX_DEBUG_ONLY(base_type::assert_node_consistent(_Node, _Bool, \ 170*38fd1498Szrj __FILE__, __LINE__);) 171*38fd1498Szrj 172*38fd1498Szrj #include <ext/pb_ds/detail/pairing_heap_/constructors_destructor_fn_imps.hpp> 173*38fd1498Szrj #include <ext/pb_ds/detail/pairing_heap_/debug_fn_imps.hpp> 174*38fd1498Szrj #include <ext/pb_ds/detail/pairing_heap_/find_fn_imps.hpp> 175*38fd1498Szrj #include <ext/pb_ds/detail/pairing_heap_/insert_fn_imps.hpp> 176*38fd1498Szrj #include <ext/pb_ds/detail/pairing_heap_/erase_fn_imps.hpp> 177*38fd1498Szrj #include <ext/pb_ds/detail/pairing_heap_/split_join_fn_imps.hpp> 178*38fd1498Szrj 179*38fd1498Szrj #undef PB_DS_ASSERT_NODE_CONSISTENT 180*38fd1498Szrj #undef PB_DS_CLASS_C_DEC 181*38fd1498Szrj #undef PB_DS_CLASS_T_DEC 182*38fd1498Szrj #undef PB_DS_P_HEAP_BASE 183*38fd1498Szrj 184*38fd1498Szrj } // namespace detail 185*38fd1498Szrj } // namespace __gnu_pbds 186