old-autovect-branch/libstdc++-v3/include/ext/pb_assoc/detail/gp_ht_map_/find_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 find_store_hash_fn_imps.hpp
  42  * Contains implementations of gp_ht_map_'s insert related functions, when the hash
  43  *      value is stored.
  44  */
  45
  46 PB_ASSOC_CLASS_T_DEC
  47 inline typename PB_ASSOC_CLASS_C_DEC::const_data_reference
  48 PB_ASSOC_CLASS_C_DEC::
  49 const_subscript_imp(const_key_reference r_key, int_to_type<true>)  const
  50 {
  51   PB_ASSOC_DBG_ONLY(assert_valid();)
  52
  53     return (const_cast<PB_ASSOC_CLASS_C_DEC& >(*this).find_key_pointer(r_key, my_traits_base::m_store_hash_indicator)->second);
  54 }
  55
  56 PB_ASSOC_CLASS_T_DEC
  57 inline typename PB_ASSOC_CLASS_C_DEC::pointer
  58 PB_ASSOC_CLASS_C_DEC::
  59 find_key_pointer(const_key_reference r_key, int_to_type<true>)
  60 {
  61   comp_hash pos_hash_pair = my_ranged_probe_fn_base::operator()(r_key);
  62
  63   size_type i;
  64
  65   my_resize_base::notify_find_search_start();
  66
  67   // Loop until entry is found or until all possible entries accessed.
  68
  69   for (i = 0; i < m_num_e; ++i)
  70     {
  71       const size_type pos =
  72         my_ranged_probe_fn_base::operator()(r_key, pos_hash_pair.second, i);
  73
  74       entry* const p_e = m_a_entries + pos;
  75
  76       switch(p_e->m_stat)
  77         {
  78         case EMPTY_ENTRY_STATUS:
  79           {
  80             my_resize_base::notify_find_search_end();
  81
  82             PB_ASSOC_DBG_ONLY(my_map_debug_base::
  83                               check_key_does_not_exist(r_key);)
  84
  85               return (NULL);
  86           }
  87           break;
  88         case VALID_ENTRY_STATUS:
  89           if (my_hash_eq_fn_base::operator()(
  90                                              PB_ASSOC_V2F(p_e->m_value),
  91                                              p_e->m_hash,
  92                                              r_key,
  93                                              pos_hash_pair.second))
  94             {
  95               my_resize_base::notify_find_search_end();
  96
  97               PB_ASSOC_DBG_ONLY(my_map_debug_base::check_key_exists(r_key);)
  98
  99                 return ((pointer)&p_e->m_value);
 100             }
 101           break;
 102         case ERASED_ENTRY_STATUS:
 103           break;
 104         default:
 105           PB_ASSOC_DBG_ASSERT(0);
 106         };
 107
 108       my_resize_base::notify_find_search_collision();
 109     }
 110
 111   PB_ASSOC_DBG_ONLY(my_map_debug_base::
 112                     check_key_does_not_exist(r_key);)
 113
 114     my_resize_base::notify_find_search_end();
 115
 116   return (NULL);
 117 }
 118