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 a binary_heap. 45 */ 46 47PB_DS_CLASS_T_DEC 48template<typename Pred> 49void 50PB_DS_CLASS_C_DEC:: 51split(Pred pred, PB_DS_CLASS_C_DEC& other) 52{ 53 _GLIBCXX_DEBUG_ONLY(assert_valid();) 54 55 typedef 56 typename entry_pred< 57 value_type, 58 Pred, 59 simple_value, 60 Allocator>::type 61 pred_t; 62 63 const size_type left = partition(pred_t(pred)); 64 65 _GLIBCXX_DEBUG_ASSERT(m_size >= left); 66 67 const size_type ersd = m_size - left; 68 69 _GLIBCXX_DEBUG_ASSERT(m_size >= ersd); 70 71 const size_type actual_size = 72 resize_policy::get_new_size_for_arbitrary(left); 73 74 const size_type other_actual_size = 75 other.get_new_size_for_arbitrary(ersd); 76 77 entry_pointer a_entries = NULL; 78 entry_pointer a_other_entries = NULL; 79 80 try 81 { 82 a_entries = s_entry_allocator.allocate(actual_size); 83 84 a_other_entries = s_entry_allocator.allocate(other_actual_size); 85 } 86 catch(...) 87 { 88 if (a_entries != NULL) 89 s_entry_allocator.deallocate(a_entries, actual_size); 90 91 if (a_other_entries != NULL) 92 s_entry_allocator.deallocate(a_other_entries, other_actual_size); 93 94 __throw_exception_again; 95 }; 96 97 for (size_type i = 0; i < other.m_size; ++i) 98 erase_at(other.m_a_entries, i, s_no_throw_copies_ind); 99 100 _GLIBCXX_DEBUG_ASSERT(actual_size >= left); 101 std::copy(m_a_entries, m_a_entries + left, a_entries); 102 std::copy(m_a_entries + left, m_a_entries + m_size, a_other_entries); 103 104 s_entry_allocator.deallocate(m_a_entries, m_actual_size); 105 s_entry_allocator.deallocate(other.m_a_entries, other.m_actual_size); 106 107 m_actual_size = actual_size; 108 other.m_actual_size = other_actual_size; 109 110 m_size = left; 111 other.m_size = ersd; 112 113 m_a_entries = a_entries; 114 other.m_a_entries = a_other_entries; 115 116 std::make_heap(m_a_entries, m_a_entries + m_size, static_cast<entry_cmp& >(*this)); 117 std::make_heap(other.m_a_entries, other.m_a_entries + other.m_size, static_cast<entry_cmp& >(other)); 118 119 resize_policy::notify_arbitrary(m_actual_size); 120 other.notify_arbitrary(other.m_actual_size); 121 122 _GLIBCXX_DEBUG_ONLY(assert_valid();) 123 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 124 } 125 126PB_DS_CLASS_T_DEC 127inline void 128PB_DS_CLASS_C_DEC:: 129join(PB_DS_CLASS_C_DEC& other) 130{ 131 _GLIBCXX_DEBUG_ONLY(assert_valid();) 132 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 133 134 const size_type len = m_size + other.m_size; 135 const size_type actual_size = resize_policy::get_new_size_for_arbitrary(len); 136 137 entry_pointer a_entries = NULL; 138 entry_pointer a_other_entries = NULL; 139 140 try 141 { 142 a_entries = s_entry_allocator.allocate(actual_size); 143 a_other_entries = s_entry_allocator.allocate(resize_policy::min_size); 144 } 145 catch(...) 146 { 147 if (a_entries != NULL) 148 s_entry_allocator.deallocate(a_entries, actual_size); 149 150 if (a_other_entries != NULL) 151 s_entry_allocator.deallocate(a_other_entries, resize_policy::min_size); 152 153 __throw_exception_again; 154 } 155 156 std::copy(m_a_entries, m_a_entries + m_size, a_entries); 157 std::copy(other.m_a_entries, other.m_a_entries + other.m_size, a_entries + m_size); 158 159 s_entry_allocator.deallocate(m_a_entries, m_actual_size); 160 m_a_entries = a_entries; 161 m_size = len; 162 m_actual_size = actual_size; 163 164 resize_policy::notify_arbitrary(actual_size); 165 166 std::make_heap(m_a_entries, m_a_entries + m_size, static_cast<entry_cmp& >(*this)); 167 168 s_entry_allocator.deallocate(other.m_a_entries, other.m_actual_size); 169 other.m_a_entries = a_other_entries; 170 other.m_size = 0; 171 other.m_actual_size = resize_policy::min_size; 172 173 other.notify_arbitrary(resize_policy::min_size); 174 175 _GLIBCXX_DEBUG_ONLY(assert_valid();) 176 _GLIBCXX_DEBUG_ONLY(other.assert_valid();) 177} 178 179