split_join_fn_imps.hpp revision 169691
1// -*- C++ -*- 2 3// Copyright (C) 2005, 2006 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 2, 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// You should have received a copy of the GNU General Public License 17// along with this library; see the file COPYING. If not, write to 18// the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 19// MA 02111-1307, USA. 20 21// As a special exception, you may use this file as part of a free 22// software library without restriction. Specifically, if other files 23// instantiate templates or use macros or inline functions from this 24// file, or you compile this file and link it with other files to 25// produce an executable, this file does not by itself cause the 26// resulting executable to be covered by the GNU General Public 27// License. This exception does not however invalidate any other 28// reasons why the executable file might be covered by the GNU General 29// Public License. 30 31// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 32 33// Permission to use, copy, modify, sell, and distribute this software 34// is hereby granted without fee, provided that the above copyright 35// notice appears in all copies, and that both that copyright notice 36// and this permission notice appear in supporting documentation. None 37// of the above authors, nor IBM Haifa Research Laboratories, make any 38// representation about the suitability of this software for any 39// purpose. It is provided "as is" without express or implied 40// warranty. 41 42/** 43 * @file split_join_fn_imps.hpp 44 * Contains an implementation class for ov_tree_. 45 */ 46 47PB_DS_CLASS_T_DEC 48void 49PB_DS_CLASS_C_DEC:: 50split(const_key_reference r_key, PB_DS_CLASS_C_DEC& other) 51{ 52 _GLIBCXX_DEBUG_ONLY(assert_valid();) 53 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 54 55 if (m_size == 0) 56 { 57 other.clear(); 58 _GLIBCXX_DEBUG_ONLY(assert_valid();) 59 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 60 return; 61 } 62 63 if (Cmp_Fn::operator()(r_key, PB_DS_V2F(*begin()))) 64 { 65 value_swap(other); 66 _GLIBCXX_DEBUG_ONLY(assert_valid();) 67 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 68 return; 69 } 70 71 if (!Cmp_Fn::operator()(r_key, PB_DS_V2F(*(end() - 1)))) 72 { 73 _GLIBCXX_DEBUG_ONLY(assert_valid();) 74 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 75 return; 76 } 77 78 if (m_size == 1) 79 { 80 value_swap(other); 81 _GLIBCXX_DEBUG_ONLY(assert_valid();) 82 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 83 return; 84 } 85 86 _GLIBCXX_DEBUG_ONLY(map_debug_base::join(other);) 87 iterator it = upper_bound(r_key); 88 PB_DS_CLASS_C_DEC new_other(other, other); 89 new_other.copy_from_ordered_range(it, end()); 90 PB_DS_CLASS_C_DEC new_this(*this, * this); 91 new_this.copy_from_ordered_range(begin(), it); 92 93 // No exceptions from this point. 94 _GLIBCXX_DEBUG_ONLY(map_debug_base::split(r_key,(Cmp_Fn& )(*this), other);) 95 other.update(other.node_begin(), (node_update* )(&other)); 96 update(node_begin(), (node_update* )this); 97 other.value_swap(new_other); 98 value_swap(new_this); 99 _GLIBCXX_DEBUG_ONLY(assert_valid();) 100 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 101} 102 103PB_DS_CLASS_T_DEC 104void 105PB_DS_CLASS_C_DEC:: 106join(PB_DS_CLASS_C_DEC& other) 107{ 108 _GLIBCXX_DEBUG_ONLY(assert_valid();) 109 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 110 if (other.m_size == 0) 111 return; 112 113 if (m_size == 0) 114 { 115 value_swap(other); 116 return; 117 } 118 119 const bool greater = Cmp_Fn::operator()(PB_DS_V2F(*(end() - 1)), 120 PB_DS_V2F(*other.begin())); 121 122 const bool lesser = Cmp_Fn::operator()(PB_DS_V2F(*(other.end() - 1)), 123 PB_DS_V2F(*begin())); 124 125 if (!greater && !lesser) 126 __throw_join_error(); 127 128 PB_DS_CLASS_C_DEC new_this(*this, *this); 129 130 if (greater) 131 new_this.copy_from_ordered_range(begin(), end(), 132 other.begin(), other.end()); 133 else 134 new_this.copy_from_ordered_range(other.begin(), other.end(), 135 begin(), end()); 136 137 // No exceptions from this point. 138 _GLIBCXX_DEBUG_ONLY(map_debug_base::join(other);) 139 value_swap(new_this); 140 other.clear(); 141 _GLIBCXX_DEBUG_ONLY(assert_valid();) 142 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 143} 144