1 // -*- C++ -*- 2 3 // Copyright (C) 2005, 2006, 2009 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 26 27 // Permission to use, copy, modify, sell, and distribute this software 28 // is hereby granted without fee, provided that the above copyright 29 // notice appears in all copies, and that both that copyright notice 30 // and this permission notice appear in supporting documentation. None 31 // of the above authors, nor IBM Haifa Research Laboratories, make any 32 // representation about the suitability of this software for any 33 // purpose. It is provided "as is" without express or implied 34 // warranty. 35 36 /** 37 * @file split_join_fn_imps.hpp 38 * Contains an implementation class for bin_search_tree_. 39 */ 40 41 PB_DS_CLASS_T_DEC 42 bool 43 PB_DS_CLASS_C_DEC:: 44 join_prep(PB_DS_CLASS_C_DEC& other) 45 { 46 _GLIBCXX_DEBUG_ONLY(assert_valid();) 47 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 48 if (other.m_size == 0) 49 return false; 50 51 if (m_size == 0) 52 { 53 value_swap(other); 54 return false; 55 } 56 57 const bool greater = Cmp_Fn::operator()(PB_DS_V2F(m_p_head->m_p_right->m_value), PB_DS_V2F(other.m_p_head->m_p_left->m_value)); 58 59 const bool lesser = Cmp_Fn::operator()(PB_DS_V2F(other.m_p_head->m_p_right->m_value), PB_DS_V2F(m_p_head->m_p_left->m_value)); 60 61 if (!greater && !lesser) 62 __throw_join_error(); 63 64 if (lesser) 65 value_swap(other); 66 67 m_size += other.m_size; 68 _GLIBCXX_DEBUG_ONLY(debug_base::join(other);) 69 return true; 70 } 71 72 PB_DS_CLASS_T_DEC 73 void 74 PB_DS_CLASS_C_DEC:: 75 join_finish(PB_DS_CLASS_C_DEC& other) 76 { 77 initialize_min_max(); 78 other.initialize(); 79 } 80 81 PB_DS_CLASS_T_DEC 82 bool 83 PB_DS_CLASS_C_DEC:: 84 split_prep(const_key_reference r_key, PB_DS_CLASS_C_DEC& other) 85 { 86 _GLIBCXX_DEBUG_ONLY(assert_valid();) 87 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 88 other.clear(); 89 90 if (m_size == 0) 91 { 92 _GLIBCXX_DEBUG_ONLY(assert_valid();) 93 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 94 return false; 95 } 96 97 if (Cmp_Fn::operator()(r_key, PB_DS_V2F(m_p_head->m_p_left->m_value))) 98 { 99 value_swap(other); 100 _GLIBCXX_DEBUG_ONLY(assert_valid();) 101 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 102 return false; 103 } 104 105 if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(m_p_head->m_p_right->m_value))) 106 { 107 _GLIBCXX_DEBUG_ONLY(assert_valid();) 108 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 109 return false; 110 } 111 112 if (m_size == 1) 113 { 114 value_swap(other); 115 _GLIBCXX_DEBUG_ONLY(assert_valid();) 116 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 117 return false; 118 } 119 120 _GLIBCXX_DEBUG_ONLY(debug_base::split(r_key,(Cmp_Fn& )(*this), other);) 121 return true; 122 } 123 124 PB_DS_CLASS_T_DEC 125 void 126 PB_DS_CLASS_C_DEC:: 127 split_finish(PB_DS_CLASS_C_DEC& other) 128 { 129 other.initialize_min_max(); 130 other.m_size = std::distance(other.begin(), other.end()); 131 m_size -= other.m_size; 132 initialize_min_max(); 133 _GLIBCXX_DEBUG_ONLY(assert_valid();) 134 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 135 } 136 137 PB_DS_CLASS_T_DEC 138 typename PB_DS_CLASS_C_DEC::size_type 139 PB_DS_CLASS_C_DEC:: 140 recursive_count(node_pointer p) const 141 { 142 if (p == NULL) 143 return 0; 144 return 1 + recursive_count(p->m_p_left) + recursive_count(p->m_p_right); 145 } 146 147