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binary_heap_
binary_heap_.hpp
// -*- C++ -*- // Copyright (C) 2005-2018 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 binary_heap_/binary_heap_.hpp * Contains an implementation class for a binary heap. */ #ifndef PB_DS_BINARY_HEAP_HPP #define PB_DS_BINARY_HEAP_HPP #include <queue> #include <algorithm> #include <ext/pb_ds/detail/cond_dealtor.hpp> #include <ext/pb_ds/detail/cond_dealtor.hpp> #include <ext/pb_ds/detail/type_utils.hpp> #include <ext/pb_ds/detail/binary_heap_/entry_cmp.hpp> #include <ext/pb_ds/detail/binary_heap_/entry_pred.hpp> #include <ext/pb_ds/detail/binary_heap_/resize_policy.hpp> #include <ext/pb_ds/detail/binary_heap_/point_const_iterator.hpp> #include <ext/pb_ds/detail/binary_heap_/const_iterator.hpp> #ifdef PB_DS_BINARY_HEAP_TRACE_ #include <iostream> #endif #include <ext/pb_ds/detail/type_utils.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 \ binary_heap<Value_Type, Cmp_Fn, _Alloc> #define PB_DS_ENTRY_CMP_DEC \ entry_cmp<Value_Type, Cmp_Fn, _Alloc, is_simple<Value_Type>::value>::type #define PB_DS_RESIZE_POLICY_DEC \ __gnu_pbds::detail::resize_policy<typename _Alloc::size_type> /** * Binary heaps composed of resize and compare policies. * * @ingroup heap-detail * * Based on CLRS. */ template<typename Value_Type, typename Cmp_Fn, typename _Alloc> class binary_heap : public PB_DS_ENTRY_CMP_DEC, public PB_DS_RESIZE_POLICY_DEC { 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 PB_DS_ENTRY_CMP_DEC entry_cmp; typedef PB_DS_RESIZE_POLICY_DEC resize_policy; typedef cond_dealtor<value_type, _Alloc> cond_dealtor_t; private: enum { simple_value = is_simple<value_type>::value }; typedef integral_constant<int, simple_value> no_throw_copies_t; typedef typename _Alloc::template rebind<value_type> __rebind_v; typedef typename __rebind_v::other value_allocator; public: typedef typename value_allocator::pointer pointer; typedef typename value_allocator::const_pointer const_pointer; typedef typename value_allocator::reference reference; typedef typename value_allocator::const_reference const_reference; typedef typename __conditional_type<simple_value, value_type, pointer>::__type entry; typedef typename _Alloc::template rebind<entry>::other entry_allocator; typedef typename entry_allocator::pointer entry_pointer; typedef binary_heap_point_const_iterator_<value_type, entry, simple_value, _Alloc> point_const_iterator; typedef point_const_iterator point_iterator; typedef binary_heap_const_iterator_<value_type, entry, simple_value, _Alloc> const_iterator; typedef const_iterator iterator; binary_heap(); binary_heap(const cmp_fn&); binary_heap(const binary_heap&); void swap(binary_heap&); ~binary_heap(); inline bool empty() const; inline size_type size() const; inline size_type max_size() const; Cmp_Fn& get_cmp_fn(); const Cmp_Fn& get_cmp_fn() const; inline point_iterator push(const_reference); void modify(point_iterator, const_reference); inline const_reference top() const; inline void pop(); inline void erase(point_iterator); template<typename Pred> size_type erase_if(Pred); inline void erase_at(entry_pointer, size_type, false_type); inline void erase_at(entry_pointer, size_type, true_type); inline iterator begin(); inline const_iterator begin() const; inline iterator end(); inline const_iterator end() const; void clear(); template<typename Pred> void split(Pred, binary_heap&); void join(binary_heap&); #ifdef PB_DS_BINARY_HEAP_TRACE_ void trace() const; #endif protected: template<typename It> void copy_from_range(It, It); private: void value_swap(binary_heap&); inline void insert_value(const_reference, false_type); inline void insert_value(value_type, true_type); inline void resize_for_insert_if_needed(); inline void swap_value_imp(entry_pointer, value_type, true_type); inline void swap_value_imp(entry_pointer, const_reference, false_type); void fix(entry_pointer); inline const_reference top_imp(true_type) const; inline const_reference top_imp(false_type) const; inline static size_type left_child(size_type); inline static size_type right_child(size_type); inline static size_type parent(size_type); inline void resize_for_erase_if_needed(); template<typename Pred> size_type partition(Pred); void make_heap() { const entry_cmp& m_cmp = static_cast<entry_cmp&>(*this); entry_pointer end = m_a_entries + m_size; std::make_heap(m_a_entries, end, m_cmp); } void push_heap() { const entry_cmp& m_cmp = static_cast<entry_cmp&>(*this); entry_pointer end = m_a_entries + m_size; std::push_heap(m_a_entries, end, m_cmp); } void pop_heap() { const entry_cmp& m_cmp = static_cast<entry_cmp&>(*this); entry_pointer end = m_a_entries + m_size; std::pop_heap(m_a_entries, end, m_cmp); } #ifdef _GLIBCXX_DEBUG void assert_valid(const char*, int) const; #endif #ifdef PB_DS_BINARY_HEAP_TRACE_ void trace_entry(const entry&, false_type) const; void trace_entry(const entry&, true_type) const; #endif static entry_allocator s_entry_allocator; static value_allocator s_value_allocator; static no_throw_copies_t s_no_throw_copies_ind; size_type m_size; size_type m_actual_size; entry_pointer m_a_entries; }; #define PB_DS_ASSERT_VALID(X) \ _GLIBCXX_DEBUG_ONLY(X.assert_valid(__FILE__, __LINE__);) #define PB_DS_DEBUG_VERIFY(_Cond) \ _GLIBCXX_DEBUG_VERIFY_AT(_Cond, \ _M_message(#_Cond" assertion from %1;:%2;") \ ._M_string(__FILE__)._M_integer(__LINE__) \ ,__file,__line) #include <ext/pb_ds/detail/binary_heap_/insert_fn_imps.hpp> #include <ext/pb_ds/detail/binary_heap_/constructors_destructor_fn_imps.hpp> #include <ext/pb_ds/detail/binary_heap_/iterators_fn_imps.hpp> #include <ext/pb_ds/detail/binary_heap_/debug_fn_imps.hpp> #include <ext/pb_ds/detail/binary_heap_/trace_fn_imps.hpp> #include <ext/pb_ds/detail/binary_heap_/erase_fn_imps.hpp> #include <ext/pb_ds/detail/binary_heap_/info_fn_imps.hpp> #include <ext/pb_ds/detail/binary_heap_/find_fn_imps.hpp> #include <ext/pb_ds/detail/binary_heap_/split_join_fn_imps.hpp> #include <ext/pb_ds/detail/binary_heap_/policy_access_fn_imps.hpp> #undef PB_DS_CLASS_C_DEC #undef PB_DS_CLASS_T_DEC #undef PB_DS_ENTRY_CMP_DEC #undef PB_DS_RESIZE_POLICY_DEC } // namespace detail } // namespace __gnu_pbds #endif
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