libstdc++-v3/include/ext/pb_ds/detail/list_update_map_/erase_fn_imps.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005-2019 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 list_update_map_/erase_fn_imps.hpp
  38  * Contains implementations of lu_map_.
  39  */
  40
  41 #ifdef PB_DS_CLASS_C_DEC
  42
  43 PB_DS_CLASS_T_DEC
  44 inline bool
  45 PB_DS_CLASS_C_DEC::
  46 erase(key_const_reference r_key)
  47 {
  48   PB_DS_ASSERT_VALID((*this))
  49   if (m_p_l == 0)
  50     return false;
  51
  52   if (s_eq_fn(r_key, PB_DS_V2F(m_p_l->m_value)))
  53     {
  54       entry_pointer p_next = m_p_l->m_p_next;
  55       actual_erase_entry(m_p_l);
  56       m_p_l = p_next;
  57       return true;
  58     }
  59
  60   entry_pointer p_l = m_p_l;
  61   while (p_l->m_p_next != 0)
  62     if (s_eq_fn(r_key, PB_DS_V2F(p_l->m_p_next->m_value)))
  63       {
  64         erase_next(p_l);
  65         return true;
  66       }
  67     else
  68       p_l = p_l->m_p_next;
  69   return false;
  70 }
  71
  72 PB_DS_CLASS_T_DEC
  73 void
  74 PB_DS_CLASS_C_DEC::
  75 clear()
  76 {
  77   deallocate_all();
  78 }
  79
  80 PB_DS_CLASS_T_DEC
  81 template<typename Pred>
  82 inline typename PB_DS_CLASS_C_DEC::size_type
  83 PB_DS_CLASS_C_DEC::
  84 erase_if(Pred pred)
  85 {
  86   PB_DS_ASSERT_VALID((*this))
  87   size_type num_ersd = 0;
  88   while (m_p_l != 0 && pred(m_p_l->m_value))
  89     {
  90       entry_pointer p_next = m_p_l->m_p_next;
  91       ++num_ersd;
  92       actual_erase_entry(m_p_l);
  93       m_p_l = p_next;
  94     }
  95
  96   if (m_p_l == 0)
  97     return num_ersd;
  98
  99   entry_pointer p_l = m_p_l;
 100   while (p_l->m_p_next != 0)
 101     {
 102       if (pred(p_l->m_p_next->m_value))
 103         {
 104           ++num_ersd;
 105           erase_next(p_l);
 106         }
 107       else
 108         p_l = p_l->m_p_next;
 109     }
 110
 111   PB_DS_ASSERT_VALID((*this))
 112   return num_ersd;
 113 }
 114
 115 PB_DS_CLASS_T_DEC
 116 void
 117 PB_DS_CLASS_C_DEC::
 118 erase_next(entry_pointer p_l)
 119 {
 120   _GLIBCXX_DEBUG_ASSERT(p_l != 0);
 121   _GLIBCXX_DEBUG_ASSERT(p_l->m_p_next != 0);
 122   entry_pointer p_next_l = p_l->m_p_next->m_p_next;
 123   actual_erase_entry(p_l->m_p_next);
 124   p_l->m_p_next = p_next_l;
 125 }
 126
 127 PB_DS_CLASS_T_DEC
 128 void
 129 PB_DS_CLASS_C_DEC::
 130 actual_erase_entry(entry_pointer p_l)
 131 {
 132   _GLIBCXX_DEBUG_ONLY(debug_base::erase_existing(PB_DS_V2F(p_l->m_value));)
 133   p_l->~entry();
 134   s_entry_allocator.deallocate(p_l, 1);
 135 }
 136
 137 #endif