order_statistics_imp.hpp revision 169691
1// -*- C++ -*- 2 3// Copyright (C) 2005, 2006 Free Software Foundation, Inc. 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the terms 7// of the GNU General Public License as published by the Free Software 8// Foundation; either version 2, or (at your option) any later 9// version. 10 11// This library is distributed in the hope that it will be useful, but 12// WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14// General Public License for more details. 15 16// You should have received a copy of the GNU General Public License 17// along with this library; see the file COPYING. If not, write to 18// the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 19// MA 02111-1307, USA. 20 21// As a special exception, you may use this file as part of a free 22// software library without restriction. Specifically, if other files 23// instantiate templates or use macros or inline functions from this 24// file, or you compile this file and link it with other files to 25// produce an executable, this file does not by itself cause the 26// resulting executable to be covered by the GNU General Public 27// License. This exception does not however invalidate any other 28// reasons why the executable file might be covered by the GNU General 29// Public License. 30 31// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 32 33// Permission to use, copy, modify, sell, and distribute this software 34// is hereby granted without fee, provided that the above copyright 35// notice appears in all copies, and that both that copyright notice 36// and this permission notice appear in supporting documentation. None 37// of the above authors, nor IBM Haifa Research Laboratories, make any 38// representation about the suitability of this software for any 39// purpose. It is provided "as is" without express or implied 40// warranty. 41 42/** 43 * @file order_statistics_imp.hpp 44 * Contains forward declarations for order_statistics_key 45 */ 46 47PB_DS_CLASS_T_DEC 48inline typename PB_DS_CLASS_C_DEC::iterator 49PB_DS_CLASS_C_DEC:: 50find_by_order(size_type order) 51{ 52 node_iterator it = node_begin(); 53 54 node_iterator end_it = node_end(); 55 56 while (it != end_it) 57 { 58 node_iterator l_it = it.get_l_child(); 59 60 const size_type o = (l_it == end_it)? 61 0 : 62 l_it.get_metadata(); 63 64 if (order == o) 65 return (*it); 66 else if (order < o) 67 it = l_it; 68 else 69 { 70 order -= o + 1; 71 72 it = it.get_r_child(); 73 } 74 } 75 76 return (PB_DS_BASE_C_DEC::end_iterator()); 77} 78 79PB_DS_CLASS_T_DEC 80inline typename PB_DS_CLASS_C_DEC::const_iterator 81PB_DS_CLASS_C_DEC:: 82find_by_order(size_type order) const 83{ 84 return (const_cast<PB_DS_CLASS_C_DEC* >(this)->find_by_order(order)); 85} 86 87PB_DS_CLASS_T_DEC 88inline typename PB_DS_CLASS_C_DEC::size_type 89PB_DS_CLASS_C_DEC:: 90order_of_key(const_key_reference r_key) const 91{ 92 const_node_iterator it = node_begin(); 93 94 const_node_iterator end_it = node_end(); 95 96 const cmp_fn& r_cmp_fn = 97 const_cast<PB_DS_CLASS_C_DEC* >(this)->get_cmp_fn(); 98 99 size_type ord = 0; 100 101 while (it != end_it) 102 { 103 const_node_iterator l_it = it.get_l_child(); 104 105 if (r_cmp_fn(r_key, extract_key(*(*it)))) 106 it = l_it; 107 else if (r_cmp_fn(extract_key(*(*it)), r_key)) 108 { 109 110 ord += (l_it == end_it)? 111 1 : 112 1 + l_it.get_metadata(); 113 114 it = it.get_r_child(); 115 } 116 else 117 { 118 ord += (l_it == end_it)? 119 0 : 120 l_it.get_metadata(); 121 122 it = end_it; 123 } 124 } 125 126 return (ord); 127} 128 129PB_DS_CLASS_T_DEC 130inline void 131PB_DS_CLASS_C_DEC:: 132operator()(node_iterator node_it, const_node_iterator end_nd_it) const 133{ 134 node_iterator l_child_it = node_it.get_l_child(); 135 const size_type l_rank =(l_child_it == end_nd_it)? 0 : l_child_it.get_metadata(); 136 137 node_iterator r_child_it = node_it.get_r_child(); 138 const size_type r_rank =(r_child_it == end_nd_it)? 0 : r_child_it.get_metadata(); 139 140 const_cast<metadata_reference>(node_it.get_metadata())= 141 1 + l_rank + r_rank; 142} 143 144PB_DS_CLASS_T_DEC 145PB_DS_CLASS_C_DEC:: 146~tree_order_statistics_node_update() 147{ } 148