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Diffstat (limited to 'libstdc++-v3/include/ext/pb_ds/tree_policy.hpp')
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diff --git a/libstdc++-v3/include/ext/pb_ds/tree_policy.hpp b/libstdc++-v3/include/ext/pb_ds/tree_policy.hpp new file mode 100644 index 000000000..4af1adbde --- /dev/null +++ b/libstdc++-v3/include/ext/pb_ds/tree_policy.hpp @@ -0,0 +1,163 @@ +// -*- C++ -*- + +// Copyright (C) 2005, 2006, 2009, 2010 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 tree_policy.hpp + * Contains tree-related policies. + */ + +#ifndef PB_DS_TREE_POLICY_HPP +#define PB_DS_TREE_POLICY_HPP + +#include <bits/c++config.h> +#include <iterator> +#include <ext/pb_ds/detail/type_utils.hpp> +#include <ext/pb_ds/detail/basic_tree_policy/basic_tree_policy_base.hpp> + +namespace __gnu_pbds +{ + // A null node updator, indicating that no node updates are required. + template<typename Const_Node_Iterator, + typename Node_Iterator, + typename Cmp_Fn, + typename Allocator> + struct null_tree_node_update + { }; + +#define PB_DS_CLASS_T_DEC \ + template<typename Const_Node_Iterator, class Node_Iterator, class Cmp_Fn, class Allocator> + +#define PB_DS_CLASS_C_DEC \ + tree_order_statistics_node_update<Const_Node_Iterator, Node_Iterator, Cmp_Fn, Allocator> + +#define PB_DS_BASE_C_DEC \ + detail::basic_tree_policy_base<Const_Node_Iterator, Node_Iterator, Allocator> + + // Functor updating ranks of entrees. + template<typename Const_Node_Iterator, typename Node_Iterator, + typename Cmp_Fn, typename Allocator> + class tree_order_statistics_node_update : private PB_DS_BASE_C_DEC + { + private: + typedef PB_DS_BASE_C_DEC base_type; + + public: + typedef Cmp_Fn cmp_fn; + typedef Allocator allocator_type; + typedef typename allocator_type::size_type size_type; + typedef typename base_type::key_type key_type; + typedef typename base_type::const_key_reference const_key_reference; + + typedef size_type metadata_type; + typedef Const_Node_Iterator const_node_iterator; + typedef Node_Iterator node_iterator; + typedef typename const_node_iterator::value_type const_iterator; + typedef typename node_iterator::value_type iterator; + + // Finds an entry by __order. Returns a const_iterator to the + // entry with the __order order, or a const_iterator to the + // container object's end if order is at least the size of the + // container object. + inline const_iterator + find_by_order(size_type order) const; + + // Finds an entry by __order. Returns an iterator to the entry + // with the __order order, or an iterator to the container + // object's end if order is at least the size of the container + // object. + inline iterator + find_by_order(size_type order); + + // Returns the order of a key within a sequence. For exapmle, if + // r_key is the smallest key, this method will return 0; if r_key + // is a key between the smallest and next key, this method will + // return 1; if r_key is a key larger than the largest key, this + // method will return the size of r_c. + inline size_type + order_of_key(const_key_reference r_key) const; + + private: + // Const reference to the container's value-type. + typedef typename base_type::const_reference const_reference; + + // Const pointer to the container's value-type. + typedef typename base_type::const_pointer const_pointer; + + typedef typename allocator_type::template rebind<metadata_type>::other metadata_rebind; + // Const metadata reference. + typedef typename metadata_rebind::const_reference const_metadata_reference; + + // Metadata reference. + typedef typename metadata_rebind::reference metadata_reference; + + // Returns the const_node_iterator associated with the tree's root node. + virtual const_node_iterator + node_begin() const = 0; + + // Returns the node_iterator associated with the tree's root node. + virtual node_iterator + node_begin() = 0; + + // Returns the const_node_iterator associated with a just-after leaf node. + virtual const_node_iterator + node_end() const = 0; + + // Returns the node_iterator associated with a just-after leaf node. + virtual node_iterator + node_end() = 0; + + // Access to the cmp_fn object. + virtual cmp_fn& + get_cmp_fn() = 0; + + protected: + // Updates the rank of a node through a node_iterator node_it; + // end_nd_it is the end node iterator. + inline void + operator()(node_iterator node_it, const_node_iterator end_nd_it) const; + + virtual + ~tree_order_statistics_node_update(); + }; + +#include <ext/pb_ds/detail/tree_policy/order_statistics_imp.hpp> + +#undef PB_DS_CLASS_T_DEC +#undef PB_DS_CLASS_C_DEC +#undef PB_DS_BASE_C_DEC + +} // namespace __gnu_pbds + +#endif |