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

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005-2020 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 cc_hash_table_map_/erase_fn_imps.hpp
  38  * Contains implementations of cc_ht_map_'s erase related functions.
  39  */
  40
  41 #ifdef PB_DS_CLASS_C_DEC
  42
  43 PB_DS_CLASS_T_DEC
  44 inline void
  45 PB_DS_CLASS_C_DEC::
  46 erase_entry_pointer(entry_pointer& r_p_e)
  47 {
  48   _GLIBCXX_DEBUG_ONLY(debug_base::erase_existing(PB_DS_V2F(r_p_e->m_value)));
  49
  50   entry_pointer p_e = r_p_e;
  51   r_p_e = r_p_e->m_p_next;
  52   rels_entry(p_e);
  53   _GLIBCXX_DEBUG_ASSERT(m_num_used_e > 0);
  54   resize_base::notify_erased(--m_num_used_e);
  55 }
  56
  57 PB_DS_CLASS_T_DEC
  58 template<typename Pred>
  59 inline typename PB_DS_CLASS_C_DEC::size_type
  60 PB_DS_CLASS_C_DEC::
  61 erase_if(Pred pred)
  62 {
  63   size_type num_ersd = 0;
  64   for (size_type pos = 0; pos < m_num_e; ++pos)
  65     {
  66       while (m_entries[pos] != 0 && pred(m_entries[pos]->m_value))
  67         {
  68           ++num_ersd;
  69           entry_pointer p_next_e = m_entries[pos]->m_p_next;
  70           erase_entry_pointer(m_entries[pos]);
  71           m_entries[pos] = p_next_e;
  72         }
  73
  74       entry_pointer p_e = m_entries[pos];
  75       while (p_e != 0 && p_e->m_p_next != 0)
  76         {
  77           if (pred(p_e->m_p_next->m_value))
  78             {
  79               ++num_ersd;
  80               erase_entry_pointer(p_e->m_p_next);
  81             }
  82           else
  83             p_e = p_e->m_p_next;
  84         }
  85     }
  86
  87   do_resize_if_needed_no_throw();
  88   return num_ersd;
  89 }
  90
  91 PB_DS_CLASS_T_DEC
  92 void
  93 PB_DS_CLASS_C_DEC::
  94 clear()
  95 {
  96   for (size_type pos = 0; pos < m_num_e; ++pos)
  97     while (m_entries[pos] != 0)
  98       erase_entry_pointer(m_entries[pos]);
  99   do_resize_if_needed_no_throw();
 100   resize_base::notify_cleared();
 101 }
 102
 103 #include <ext/pb_ds/detail/cc_hash_table_map_/erase_no_store_hash_fn_imps.hpp>
 104 #include <ext/pb_ds/detail/cc_hash_table_map_/erase_store_hash_fn_imps.hpp>
 105
 106 #endif