libstdc++-v3/include/ext/pb_ds/detail/gp_hash_table_map_/erase_no_store_hash_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 gp_hash_table_map_/erase_no_store_hash_fn_imps.hpp
  38  * Contains implementations of gp_ht_map_'s erase related functions,
  39  * when the hash value is not stored.
  40  */
  41
  42 #ifdef PB_DS_CLASS_C_DEC
  43
  44 PB_DS_CLASS_T_DEC
  45 inline bool
  46 PB_DS_CLASS_C_DEC::
  47 erase_imp(key_const_reference r_key,  false_type)
  48 {
  49   PB_DS_ASSERT_VALID((*this))
  50   size_type hash = ranged_probe_fn_base::operator()(r_key);
  51   size_type i;
  52   resize_base::notify_erase_search_start();
  53
  54   for (i = 0; i < m_num_e; ++i)
  55     {
  56       const size_type pos = ranged_probe_fn_base::operator()(r_key,  hash, i);
  57       entry* const p_e = m_entries + pos;
  58       switch(p_e->m_stat)
  59         {
  60         case empty_entry_status:
  61           {
  62             resize_base::notify_erase_search_end();
  63             PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
  64             return false;
  65           }
  66           break;
  67         case valid_entry_status:
  68           if (hash_eq_fn_base::operator()(PB_DS_V2F(p_e->m_value), r_key))
  69             {
  70               resize_base::notify_erase_search_end();
  71               erase_entry(p_e);
  72               do_resize_if_needed_no_throw();
  73               return true;
  74             }
  75           break;
  76         case erased_entry_status:
  77           break;
  78         default:
  79           _GLIBCXX_DEBUG_ASSERT(0);
  80         };
  81       resize_base::notify_erase_search_collision();
  82     }
  83   resize_base::notify_erase_search_end();
  84   return false;
  85 }
  86
  87 #endif