158 lines
5.4 KiB
C++
158 lines
5.4 KiB
C++
// -*- C++ -*-
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// Copyright (C) 2005-2018 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the terms
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// of the GNU General Public License as published by the Free Software
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// Foundation; either version 3, or (at your option) any later
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// version.
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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// Permission to use, copy, modify, sell, and distribute this software
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// is hereby granted without fee, provided that the above copyright
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// notice appears in all copies, and that both that copyright notice
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// and this permission notice appear in supporting documentation. None
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// of the above authors, nor IBM Haifa Research Laboratories, make any
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// representation about the suitability of this software for any
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// purpose. It is provided "as is" without express or implied
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// warranty.
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/**
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* @file tree_policy.hpp
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* Contains tree-related policies.
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*/
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#ifndef PB_DS_TREE_POLICY_HPP
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#define PB_DS_TREE_POLICY_HPP
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#include <bits/c++config.h>
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#include <iterator>
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#include <ext/pb_ds/detail/type_utils.hpp>
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#include <ext/pb_ds/detail/branch_policy/branch_policy.hpp>
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namespace __gnu_pbds
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{
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#define PB_DS_CLASS_T_DEC \
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template<typename Node_CItr, typename Node_Itr, typename Cmp_Fn, \
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typename _Alloc>
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#define PB_DS_CLASS_C_DEC \
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tree_order_statistics_node_update<Node_CItr, Node_Itr, Cmp_Fn, _Alloc>
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#define PB_DS_BRANCH_POLICY_BASE \
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detail::branch_policy<Node_CItr, Node_Itr, _Alloc>
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/// Functor updating ranks of entrees.
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template<typename Node_CItr, typename Node_Itr,
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typename Cmp_Fn, typename _Alloc>
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class tree_order_statistics_node_update : private PB_DS_BRANCH_POLICY_BASE
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{
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private:
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typedef PB_DS_BRANCH_POLICY_BASE base_type;
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public:
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typedef Cmp_Fn cmp_fn;
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typedef _Alloc allocator_type;
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typedef typename allocator_type::size_type size_type;
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typedef typename base_type::key_type key_type;
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typedef typename base_type::key_const_reference key_const_reference;
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typedef size_type metadata_type;
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typedef Node_CItr node_const_iterator;
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typedef Node_Itr node_iterator;
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typedef typename node_const_iterator::value_type const_iterator;
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typedef typename node_iterator::value_type iterator;
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/// Finds an entry by __order. Returns a const_iterator to the
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/// entry with the __order order, or a const_iterator to the
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/// container object's end if order is at least the size of the
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/// container object.
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inline const_iterator
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find_by_order(size_type) const;
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/// Finds an entry by __order. Returns an iterator to the entry
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/// with the __order order, or an iterator to the container
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/// object's end if order is at least the size of the container
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/// object.
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inline iterator
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find_by_order(size_type);
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/// Returns the order of a key within a sequence. For exapmle, if
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/// r_key is the smallest key, this method will return 0; if r_key
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/// is a key between the smallest and next key, this method will
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/// return 1; if r_key is a key larger than the largest key, this
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/// method will return the size of r_c.
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inline size_type
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order_of_key(key_const_reference) const;
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private:
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/// Const reference to the container's value-type.
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typedef typename base_type::const_reference const_reference;
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/// Const pointer to the container's value-type.
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typedef typename base_type::const_pointer const_pointer;
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typedef typename _Alloc::template rebind<metadata_type>::other __rebind_m;
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/// Const metadata reference.
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typedef typename __rebind_m::const_reference metadata_const_reference;
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/// Metadata reference.
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typedef typename __rebind_m::reference metadata_reference;
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/// Returns the node_const_iterator associated with the tree's root node.
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virtual node_const_iterator
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node_begin() const = 0;
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/// Returns the node_iterator associated with the tree's root node.
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virtual node_iterator
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node_begin() = 0;
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/// Returns the node_const_iterator associated with a just-after leaf node.
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virtual node_const_iterator
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node_end() const = 0;
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/// Returns the node_iterator associated with a just-after leaf node.
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virtual node_iterator
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node_end() = 0;
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/// Access to the cmp_fn object.
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virtual cmp_fn&
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get_cmp_fn() = 0;
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protected:
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/// Updates the rank of a node through a node_iterator node_it;
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/// end_nd_it is the end node iterator.
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inline void
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operator()(node_iterator, node_const_iterator) const;
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virtual
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~tree_order_statistics_node_update();
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};
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#include <ext/pb_ds/detail/tree_policy/order_statistics_imp.hpp>
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#undef PB_DS_CLASS_T_DEC
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#undef PB_DS_CLASS_C_DEC
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#undef PB_DS_BRANCH_POLICY_BASE
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} // namespace __gnu_pbds
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#endif
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