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 ov_tree_. 39 */ 40 41 PB_DS_CLASS_T_DEC 42 void 43 PB_DS_CLASS_C_DEC:: 44 split(const_key_reference r_key, PB_DS_CLASS_C_DEC& other) 45 { 46 _GLIBCXX_DEBUG_ONLY(assert_valid();) 47 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 48 49 if (m_size == 0) 50 { 51 other.clear(); 52 _GLIBCXX_DEBUG_ONLY(assert_valid();) 53 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 54 return; 55 } 56 57 if (Cmp_Fn::operator()(r_key, PB_DS_V2F(*begin()))) 58 { 59 value_swap(other); 60 _GLIBCXX_DEBUG_ONLY(assert_valid();) 61 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 62 return; 63 } 64 65 if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(*(end() - 1)))) 66 { 67 _GLIBCXX_DEBUG_ONLY(assert_valid();) 68 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 69 return; 70 } 71 72 if (m_size == 1) 73 { 74 value_swap(other); 75 _GLIBCXX_DEBUG_ONLY(assert_valid();) 76 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 77 return; 78 } 79 80 _GLIBCXX_DEBUG_ONLY(debug_base::join(other);) 81 iterator it = upper_bound(r_key); 82 PB_DS_CLASS_C_DEC new_other(other, other); 83 new_other.copy_from_ordered_range(it, end()); 84 PB_DS_CLASS_C_DEC new_this(*this, * this); 85 new_this.copy_from_ordered_range(begin(), it); 86 87 // No exceptions from this point. 88 _GLIBCXX_DEBUG_ONLY(debug_base::split(r_key,(Cmp_Fn& )(*this), other);) 89 other.update(other.node_begin(), (node_update* )(&other)); 90 update(node_begin(), (node_update* )this); 91 other.value_swap(new_other); 92 value_swap(new_this); 93 _GLIBCXX_DEBUG_ONLY(assert_valid();) 94 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 95 } 96 97 PB_DS_CLASS_T_DEC 98 void 99 PB_DS_CLASS_C_DEC:: 100 join(PB_DS_CLASS_C_DEC& other) 101 { 102 _GLIBCXX_DEBUG_ONLY(assert_valid();) 103 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 104 if (other.m_size == 0) 105 return; 106 107 if (m_size == 0) 108 { 109 value_swap(other); 110 return; 111 } 112 113 const bool greater = Cmp_Fn::operator()(PB_DS_V2F(*(end() - 1)), 114 PB_DS_V2F(*other.begin())); 115 116 const bool lesser = Cmp_Fn::operator()(PB_DS_V2F(*(other.end() - 1)), 117 PB_DS_V2F(*begin())); 118 119 if (!greater && !lesser) 120 __throw_join_error(); 121 122 PB_DS_CLASS_C_DEC new_this(*this, *this); 123 124 if (greater) 125 new_this.copy_from_ordered_range(begin(), end(), 126 other.begin(), other.end()); 127 else 128 new_this.copy_from_ordered_range(other.begin(), other.end(), 129 begin(), end()); 130 131 // No exceptions from this point. 132 _GLIBCXX_DEBUG_ONLY(debug_base::join(other);) 133 value_swap(new_this); 134 other.clear(); 135 _GLIBCXX_DEBUG_ONLY(assert_valid();) 136 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 137 } 138
