1 // -*- C++ -*- 2 3 // Copyright (C) 2005, 2006, 2009, 2010 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 erase_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 clear() 45 { 46 _GLIBCXX_DEBUG_ONLY(assert_valid();) 47 if (m_size == 0) 48 { 49 _GLIBCXX_DEBUG_ONLY(assert_valid();) 50 return; 51 } 52 else 53 { 54 reallocate_metadata((node_update* )this, 0); 55 cond_dtor<size_type> cd(m_a_values, m_end_it, m_size); 56 } 57 58 _GLIBCXX_DEBUG_ONLY(debug_base::clear();) 59 m_a_values = 0; 60 m_size = 0; 61 m_end_it = m_a_values; 62 _GLIBCXX_DEBUG_ONLY(assert_valid();) 63 } 64 65 PB_DS_CLASS_T_DEC 66 template<typename Pred> 67 inline typename PB_DS_CLASS_C_DEC::size_type 68 PB_DS_CLASS_C_DEC:: 69 erase_if(Pred pred) 70 { 71 _GLIBCXX_DEBUG_ONLY(assert_valid();) 72 73 #ifdef PB_DS_REGRESSION 74 typename Allocator::group_adjustor adjust(m_size); 75 #endif 76 77 size_type new_size = 0; 78 size_type num_val_ersd = 0; 79 iterator source_it = m_a_values; 80 for (source_it = begin(); source_it != m_end_it; ++source_it) 81 if (!pred(*source_it)) 82 ++new_size; 83 else 84 ++num_val_ersd; 85 86 if (new_size == 0) 87 { 88 clear(); 89 return num_val_ersd; 90 } 91 92 value_vector a_new_values = s_value_alloc.allocate(new_size); 93 iterator target_it = a_new_values; 94 cond_dtor<size_type> cd(a_new_values, target_it, new_size); 95 _GLIBCXX_DEBUG_ONLY(debug_base::clear()); 96 for (source_it = begin(); source_it != m_end_it; ++source_it) 97 { 98 if (!pred(*source_it)) 99 { 100 new (const_cast<void*>(static_cast<const void* >(target_it))) 101 value_type(*source_it); 102 103 _GLIBCXX_DEBUG_ONLY(debug_base::insert_new(PB_DS_V2F(*source_it))); 104 ++target_it; 105 } 106 } 107 108 reallocate_metadata((node_update* )this, new_size); 109 cd.set_no_action(); 110 111 { 112 cond_dtor<size_type> cd1(m_a_values, m_end_it, m_size); 113 } 114 115 m_a_values = a_new_values; 116 m_size = new_size; 117 m_end_it = target_it; 118 update(node_begin(), (node_update* )this); 119 _GLIBCXX_DEBUG_ONLY(assert_valid();) 120 return num_val_ersd; 121 } 122 123 PB_DS_CLASS_T_DEC 124 template<typename It> 125 It 126 PB_DS_CLASS_C_DEC:: 127 erase_imp(It it) 128 { 129 _GLIBCXX_DEBUG_ONLY(assert_valid();) 130 if (it == end()) 131 return end(); 132 133 _GLIBCXX_DEBUG_ONLY(PB_DS_CLASS_C_DEC::check_key_exists(PB_DS_V2F(*it));) 134 135 #ifdef PB_DS_REGRESSION 136 typename Allocator::group_adjustor adjust(m_size); 137 #endif 138 139 _GLIBCXX_DEBUG_ASSERT(m_size > 0); 140 value_vector a_values = s_value_alloc.allocate(m_size - 1); 141 iterator source_it = begin(); 142 iterator source_end_it = end(); 143 iterator target_it = a_values; 144 iterator ret_it = end(); 145 146 cond_dtor<size_type> cd(a_values, target_it, m_size - 1); 147 148 _GLIBCXX_DEBUG_ONLY(size_type cnt = 0;) 149 150 while (source_it != source_end_it) 151 { 152 if (source_it != it) 153 { 154 _GLIBCXX_DEBUG_ONLY(++cnt;) 155 _GLIBCXX_DEBUG_ASSERT(cnt != m_size); 156 new (const_cast<void* >(static_cast<const void* >(target_it))) 157 value_type(*source_it); 158 159 ++target_it; 160 } 161 else 162 ret_it = target_it; 163 ++source_it; 164 } 165 166 _GLIBCXX_DEBUG_ASSERT(m_size > 0); 167 reallocate_metadata((node_update* )this, m_size - 1); 168 cd.set_no_action(); 169 _GLIBCXX_DEBUG_ONLY(PB_DS_CLASS_C_DEC::erase_existing(PB_DS_V2F(*it));) 170 { 171 cond_dtor<size_type> cd1(m_a_values, m_end_it, m_size); 172 } 173 174 m_a_values = a_values; 175 --m_size; 176 m_end_it = m_a_values + m_size; 177 update(node_begin(), (node_update* )this); 178 _GLIBCXX_DEBUG_ONLY(assert_valid();) 179 return It(ret_it); 180 } 181 182 PB_DS_CLASS_T_DEC 183 bool 184 PB_DS_CLASS_C_DEC:: 185 erase(const_key_reference r_key) 186 { 187 point_iterator it = find(r_key); 188 if (it == end()) 189 return false; 190 erase(it); 191 return true; 192 } 193 194
