order_statistics_imp.hpp revision 169691
1218885Sdim// -*- C++ -*- 2218885Sdim 3218885Sdim// Copyright (C) 2005, 2006 Free Software Foundation, Inc. 4218885Sdim// 5218885Sdim// This file is part of the GNU ISO C++ Library. This library is free 6218885Sdim// software; you can redistribute it and/or modify it under the terms 7218885Sdim// of the GNU General Public License as published by the Free Software 8218885Sdim// Foundation; either version 2, or (at your option) any later 9218885Sdim// version. 10218885Sdim 11218885Sdim// This library is distributed in the hope that it will be useful, but 12218885Sdim// WITHOUT ANY WARRANTY; without even the implied warranty of 13218885Sdim// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14218885Sdim// General Public License for more details. 15218885Sdim 16218885Sdim// You should have received a copy of the GNU General Public License 17218885Sdim// along with this library; see the file COPYING. If not, write to 18218885Sdim// the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 19218885Sdim// MA 02111-1307, USA. 20218885Sdim 21218885Sdim// As a special exception, you may use this file as part of a free 22218885Sdim// software library without restriction. Specifically, if other files 23218885Sdim// instantiate templates or use macros or inline functions from this 24218885Sdim// file, or you compile this file and link it with other files to 25218885Sdim// produce an executable, this file does not by itself cause the 26218885Sdim// resulting executable to be covered by the GNU General Public 27218885Sdim// License. This exception does not however invalidate any other 28218885Sdim// reasons why the executable file might be covered by the GNU General 29218885Sdim// Public License. 30218885Sdim 31218885Sdim// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 32218885Sdim 33218885Sdim// Permission to use, copy, modify, sell, and distribute this software 34218885Sdim// is hereby granted without fee, provided that the above copyright 35218885Sdim// notice appears in all copies, and that both that copyright notice 36218885Sdim// and this permission notice appear in supporting documentation. None 37218885Sdim// of the above authors, nor IBM Haifa Research Laboratories, make any 38218885Sdim// representation about the suitability of this software for any 39218885Sdim// purpose. It is provided "as is" without express or implied 40218885Sdim// warranty. 41218885Sdim 42218885Sdim/** 43218885Sdim * @file order_statistics_imp.hpp 44218885Sdim * Contains forward declarations for order_statistics_key 45218885Sdim */ 46218885Sdim 47218885SdimPB_DS_CLASS_T_DEC 48218885Sdiminline typename PB_DS_CLASS_C_DEC::iterator 49218885SdimPB_DS_CLASS_C_DEC:: 50218885Sdimfind_by_order(size_type order) 51218885Sdim{ 52218885Sdim node_iterator it = node_begin(); 53218885Sdim 54218885Sdim node_iterator end_it = node_end(); 55218885Sdim 56218885Sdim while (it != end_it) 57218885Sdim { 58218885Sdim node_iterator l_it = it.get_l_child(); 59218885Sdim 60218885Sdim const size_type o = (l_it == end_it)? 61218885Sdim 0 : 62218885Sdim l_it.get_metadata(); 63218885Sdim 64218885Sdim if (order == o) 65218885Sdim return (*it); 66218885Sdim else if (order < o) 67218885Sdim it = l_it; 68218885Sdim else 69218885Sdim { 70218885Sdim order -= o + 1; 71218885Sdim 72218885Sdim it = it.get_r_child(); 73218885Sdim } 74218885Sdim } 75218885Sdim 76218885Sdim return (PB_DS_BASE_C_DEC::end_iterator()); 77218885Sdim} 78218885Sdim 79218885SdimPB_DS_CLASS_T_DEC 80218885Sdiminline typename PB_DS_CLASS_C_DEC::const_iterator 81218885SdimPB_DS_CLASS_C_DEC:: 82218885Sdimfind_by_order(size_type order) const 83218885Sdim{ 84218885Sdim return (const_cast<PB_DS_CLASS_C_DEC* >(this)->find_by_order(order)); 85218885Sdim} 86218885Sdim 87218885SdimPB_DS_CLASS_T_DEC 88218885Sdiminline typename PB_DS_CLASS_C_DEC::size_type 89218885SdimPB_DS_CLASS_C_DEC:: 90218885Sdimorder_of_key(const_key_reference r_key) const 91218885Sdim{ 92218885Sdim const_node_iterator it = node_begin(); 93218885Sdim 94218885Sdim const_node_iterator end_it = node_end(); 95218885Sdim 96218885Sdim const cmp_fn& r_cmp_fn = 97218885Sdim const_cast<PB_DS_CLASS_C_DEC* >(this)->get_cmp_fn(); 98218885Sdim 99218885Sdim size_type ord = 0; 100218885Sdim 101218885Sdim while (it != end_it) 102218885Sdim { 103218885Sdim const_node_iterator l_it = it.get_l_child(); 104218885Sdim 105218885Sdim if (r_cmp_fn(r_key, extract_key(*(*it)))) 106218885Sdim it = l_it; 107218885Sdim else if (r_cmp_fn(extract_key(*(*it)), r_key)) 108218885Sdim { 109218885Sdim 110218885Sdim ord += (l_it == end_it)? 111218885Sdim 1 : 112218885Sdim 1 + l_it.get_metadata(); 113218885Sdim 114218885Sdim it = it.get_r_child(); 115218885Sdim } 116218885Sdim 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