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

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005-2016 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 PB_DS_CLASS_T_DEC
  42 inline bool
  43 PB_DS_CLASS_C_DEC::
  44 erase(key_const_reference r_key)
  45 {
  46   PB_DS_ASSERT_VALID((*this))
  47   if (m_p_l == 0)
  48     return false;
  49
  50   if (s_eq_fn(r_key, PB_DS_V2F(m_p_l->m_value)))
  51     {
  52       entry_pointer p_next = m_p_l->m_p_next;
  53       actual_erase_entry(m_p_l);
  54       m_p_l = p_next;
  55       return true;
  56     }
  57
  58   entry_pointer p_l = m_p_l;
  59   while (p_l->m_p_next != 0)
  60     if (s_eq_fn(r_key, PB_DS_V2F(p_l->m_p_next->m_value)))
  61       {
  62         erase_next(p_l);
  63         return true;
  64       }
  65     else
  66       p_l = p_l->m_p_next;
  67   return false;
  68 }
  69
  70 PB_DS_CLASS_T_DEC
  71 void
  72 PB_DS_CLASS_C_DEC::
  73 clear()
  74 {
  75   deallocate_all();
  76 }
  77
  78 PB_DS_CLASS_T_DEC
  79 template<typename Pred>
  80 inline typename PB_DS_CLASS_C_DEC::size_type
  81 PB_DS_CLASS_C_DEC::
  82 erase_if(Pred pred)
  83 {
  84   PB_DS_ASSERT_VALID((*this))
  85   size_type num_ersd = 0;
  86   while (m_p_l != 0 && pred(m_p_l->m_value))
  87     {
  88       entry_pointer p_next = m_p_l->m_p_next;
  89       ++num_ersd;
  90       actual_erase_entry(m_p_l);
  91       m_p_l = p_next;
  92     }
  93
  94   if (m_p_l == 0)
  95     return num_ersd;
  96
  97   entry_pointer p_l = m_p_l;
  98   while (p_l->m_p_next != 0)
  99     {
 100       if (pred(p_l->m_p_next->m_value))
 101         {
 102           ++num_ersd;
 103           erase_next(p_l);
 104         }
 105       else
 106         p_l = p_l->m_p_next;
 107     }
 108
 109   PB_DS_ASSERT_VALID((*this))
 110   return num_ersd;
 111 }
 112
 113 PB_DS_CLASS_T_DEC
 114 void
 115 PB_DS_CLASS_C_DEC::
 116 erase_next(entry_pointer p_l)
 117 {
 118   _GLIBCXX_DEBUG_ASSERT(p_l != 0);
 119   _GLIBCXX_DEBUG_ASSERT(p_l->m_p_next != 0);
 120   entry_pointer p_next_l = p_l->m_p_next->m_p_next;
 121   actual_erase_entry(p_l->m_p_next);
 122   p_l->m_p_next = p_next_l;
 123 }
 124
 125 PB_DS_CLASS_T_DEC
 126 void
 127 PB_DS_CLASS_C_DEC::
 128 actual_erase_entry(entry_pointer p_l)
 129 {
 130   _GLIBCXX_DEBUG_ONLY(debug_base::erase_existing(PB_DS_V2F(p_l->m_value));)
 131   p_l->~entry();
 132   s_entry_allocator.deallocate(p_l, 1);
 133 }
 134