1 // -*- C++ -*- 2 3 // Copyright (C) 2005-2013 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 splay_tree_/split_join_fn_imps.hpp 38 * Contains an implementation class for splay_tree_. 39 */ 40 41 PB_DS_CLASS_T_DEC 42 inline void 43 PB_DS_CLASS_C_DEC:: 44 join(PB_DS_CLASS_C_DEC& other) 45 { 46 PB_DS_ASSERT_VALID((*this)) 47 PB_DS_ASSERT_VALID(other) 48 if (base_type::join_prep(other) == false) 49 { 50 PB_DS_ASSERT_VALID((*this)) 51 PB_DS_ASSERT_VALID(other) 52 return; 53 } 54 55 node_pointer p_target_r = other.leftmost(other.m_p_head); 56 _GLIBCXX_DEBUG_ASSERT(p_target_r != 0); 57 other.splay(p_target_r); 58 59 _GLIBCXX_DEBUG_ASSERT(p_target_r == other.m_p_head->m_p_parent); 60 _GLIBCXX_DEBUG_ASSERT(p_target_r->m_p_left == 0); 61 62 p_target_r->m_p_left = base_type::m_p_head->m_p_parent; 63 64 _GLIBCXX_DEBUG_ASSERT(p_target_r->m_p_left != 0); 65 p_target_r->m_p_left->m_p_parent = p_target_r; 66 67 base_type::m_p_head->m_p_parent = p_target_r; 68 p_target_r->m_p_parent = base_type::m_p_head; 69 70 this->apply_update(p_target_r, (node_update*)this); 71 base_type::join_finish(other); 72 73 PB_DS_ASSERT_VALID((*this)) 74 PB_DS_ASSERT_VALID(other) 75 } 76 77 PB_DS_CLASS_T_DEC 78 void 79 PB_DS_CLASS_C_DEC:: 80 split(key_const_reference r_key, PB_DS_CLASS_C_DEC& other) 81 { 82 PB_DS_ASSERT_VALID((*this)) 83 PB_DS_ASSERT_VALID(other) 84 85 if (base_type::split_prep(r_key, other) == false) 86 { 87 PB_DS_ASSERT_VALID((*this)) 88 PB_DS_ASSERT_VALID(other) 89 return; 90 } 91 92 node_pointer p_upper_bound = this->upper_bound(r_key).m_p_nd; 93 _GLIBCXX_DEBUG_ASSERT(p_upper_bound != 0); 94 95 splay(p_upper_bound); 96 _GLIBCXX_DEBUG_ASSERT(p_upper_bound->m_p_parent == this->m_p_head); 97 98 node_pointer p_new_root = p_upper_bound->m_p_left; 99 _GLIBCXX_DEBUG_ASSERT(p_new_root != 0); 100 101 base_type::m_p_head->m_p_parent = p_new_root; 102 p_new_root->m_p_parent = base_type::m_p_head; 103 other.m_p_head->m_p_parent = p_upper_bound; 104 p_upper_bound->m_p_parent = other.m_p_head; 105 p_upper_bound->m_p_left = 0; 106 this->apply_update(p_upper_bound, (node_update*)this); 107 base_type::split_finish(other); 108 109 PB_DS_ASSERT_VALID((*this)) 110 PB_DS_ASSERT_VALID(other) 111 } 112 113
