1 // -*- C++ -*- 2 3 // Copyright (C) 2005-2014 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 ov_tree_map_/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(key_const_reference r_key, PB_DS_CLASS_C_DEC& other) 45 { 46 PB_DS_ASSERT_VALID((*this)) 47 PB_DS_ASSERT_VALID(other) 48 49 if (m_size == 0) 50 { 51 other.clear(); 52 return; 53 } 54 55 if (Cmp_Fn::operator()(r_key, PB_DS_V2F(*begin()))) 56 { 57 value_swap(other); 58 PB_DS_ASSERT_VALID((*this)) 59 PB_DS_ASSERT_VALID(other) 60 return; 61 } 62 63 if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(*(end() - 1)))) 64 { 65 return; 66 } 67 68 if (m_size == 1) 69 { 70 value_swap(other); 71 PB_DS_ASSERT_VALID((*this)) 72 PB_DS_ASSERT_VALID(other) 73 return; 74 } 75 76 iterator it = upper_bound(r_key); 77 PB_DS_CLASS_C_DEC new_other(other, other); 78 new_other.copy_from_ordered_range(it, end()); 79 PB_DS_CLASS_C_DEC new_this(*this, *this); 80 new_this.copy_from_ordered_range(begin(), it); 81 82 // No exceptions from this point. 83 other.update(other.node_begin(), (node_update*)(&other)); 84 update(node_begin(), (node_update*)this); 85 other.value_swap(new_other); 86 value_swap(new_this); 87 PB_DS_ASSERT_VALID((*this)) 88 PB_DS_ASSERT_VALID(other) 89 } 90 91 PB_DS_CLASS_T_DEC 92 void 93 PB_DS_CLASS_C_DEC:: 94 join(PB_DS_CLASS_C_DEC& other) 95 { 96 PB_DS_ASSERT_VALID((*this)) 97 PB_DS_ASSERT_VALID(other) 98 if (other.m_size == 0) 99 return; 100 101 if (m_size == 0) 102 { 103 value_swap(other); 104 PB_DS_ASSERT_VALID((*this)) 105 PB_DS_ASSERT_VALID(other) 106 return; 107 } 108 109 const bool greater = Cmp_Fn::operator()(PB_DS_V2F(*(end() - 1)), 110 PB_DS_V2F(*other.begin())); 111 112 const bool lesser = Cmp_Fn::operator()(PB_DS_V2F(*(other.end() - 1)), 113 PB_DS_V2F(*begin())); 114 115 if (!greater && !lesser) 116 __throw_join_error(); 117 118 PB_DS_CLASS_C_DEC new_this(*this, *this); 119 120 if (greater) 121 new_this.copy_from_ordered_range(begin(), end(), 122 other.begin(), other.end()); 123 else 124 new_this.copy_from_ordered_range(other.begin(), other.end(), 125 begin(), end()); 126 127 // No exceptions from this point. 128 value_swap(new_this); 129 other.clear(); 130 PB_DS_ASSERT_VALID((*this)) 131 PB_DS_ASSERT_VALID(other) 132 } 133
