old-autovect-branch/libstdc++-v3/include/ext/pb_assoc/detail/gp_ht_map_/erase_no_store_hash_fn_imps.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005 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
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  31
  32 // Permission to use, copy, modify, sell, and distribute this software
  33 // is hereby granted without fee, provided that the above copyright
  34 // notice appears in all copies, and that both that copyright notice and
  35 // this permission notice appear in supporting documentation. None of
  36 // the above authors, nor IBM Haifa Research Laboratories, make any
  37 // representation about the suitability of this software for any
  38 // purpose. It is provided "as is" without express or implied warranty.
  39
  40 /**
  41  * @file erase_no_store_hash_fn_imps.hpp
  42  * Contains implementations of gp_ht_map_'s erase related functions, when the hash
  43  *      value is not stored.
  44  */
  45
  46 PB_ASSOC_CLASS_T_DEC
  47 inline typename PB_ASSOC_CLASS_C_DEC::size_type
  48 PB_ASSOC_CLASS_C_DEC::
  49 erase(const_key_reference r_key, int_to_type<false>)
  50 {
  51   PB_ASSOC_DBG_ONLY(PB_ASSOC_CLASS_C_DEC::assert_valid();)
  52
  53     size_type hash = my_ranged_probe_fn_base::operator()(r_key);
  54
  55   size_type i;
  56
  57   my_resize_base::notify_erase_search_start();
  58
  59   for (i = 0; i < m_num_e; ++i)
  60     {
  61       const size_type pos =
  62         my_ranged_probe_fn_base::operator()(r_key, hash, i);
  63
  64       entry* const p_e = m_a_entries + pos;
  65
  66       switch(p_e->m_stat)
  67         {
  68         case EMPTY_ENTRY_STATUS:
  69           {
  70             my_resize_base::notify_erase_search_end();
  71
  72             PB_ASSOC_DBG_ONLY(my_map_debug_base::check_key_does_not_exist(
  73                                                                           r_key));
  74
  75             return (0);
  76           }
  77           break;
  78         case VALID_ENTRY_STATUS:
  79           if (my_hash_eq_fn_base::operator()(
  80                                              PB_ASSOC_V2F(p_e->m_value)))
  81             {
  82               my_resize_base::notify_erase_search_end();
  83
  84               erase_entry(p_e);
  85
  86               do_resize_if_needed_no_throw();
  87
  88               return (1);
  89             }
  90           break;
  91         case ERASED_ENTRY_STATUS:
  92           break;
  93         default:
  94           PB_ASSOC_DBG_ASSERT(0);
  95         };
  96
  97       my_resize_base::notify_erase_search_collision();
  98     }
  99
 100   my_resize_base::notify_erase_search_end();
 101
 102   return (0);
 103 }
 104