insert_store_hash_fn_imps.hpp revision 169692 
1// -*- C++ -*-
2
3// Copyright (C) 2005, 2006 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 2, or (at your option) any later
9// version.
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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.
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16// You should have received a copy of the GNU General Public License
17// along with this library; see the file COPYING.  If not, write to
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19// MA 02111-1307, USA.
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21// As a special exception, you may use this file as part of a free
22// software library without restriction.  Specifically, if other files
23// instantiate templates or use macros or inline functions from this
24// file, or you compile this file and link it with other files to
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26// resulting executable to be covered by the GNU General Public
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28// reasons why the executable file might be covered by the GNU General
29// Public License.
30
31// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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33// Permission to use, copy, modify, sell, and distribute this software
34// is hereby granted without fee, provided that the above copyright
35// notice appears in all copies, and that both that copyright notice
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41
42/**
43 * @file insert_store_hash_fn_imps.hpp
44 * Contains implementations of gp_ht_map_'s find related functions,
45 * when the hash value is stored.
46 */
47
48PB_DS_CLASS_T_DEC
49inline typename PB_DS_CLASS_C_DEC::comp_hash
50PB_DS_CLASS_C_DEC::
51find_ins_pos(const_key_reference r_key, true_type)
52{
53  _GLIBCXX_DEBUG_ONLY(PB_DS_CLASS_C_DEC::assert_valid();)
54  comp_hash pos_hash_pair = ranged_probe_fn_base::operator()(r_key);
55
56  size_type i;
57
58  /* The insertion position is initted to a non-legal value to indicate
59   *     that it has not been initted yet.
60   */
61  size_type ins_pos = m_num_e;
62  resize_base::notify_insert_search_start();
63  for (i = 0; i < m_num_e; ++i)
64    {
65      const size_type pos = ranged_probe_fn_base::operator()(r_key, pos_hash_pair.second, i);
66
67      entry* const p_e = m_entries + pos;
68      switch(p_e->m_stat)
69        {
70        case empty_entry_status:
71	  {
72            resize_base::notify_insert_search_end();
73            _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_does_not_exist(r_key);)
74
75	    return ((ins_pos == m_num_e) ?
76		     std::make_pair(pos, pos_hash_pair.second) :
77		     std::make_pair(ins_pos, pos_hash_pair.second));
78	  }
79	  break;
80        case erased_entry_status:
81	  if (ins_pos == m_num_e)
82	    ins_pos = pos;
83	  break;
84        case valid_entry_status:
85	  if (hash_eq_fn_base::operator()(PB_DS_V2F(p_e->m_value), p_e->m_hash,
86					  r_key, pos_hash_pair.second))
87            {
88	      resize_base::notify_insert_search_end();
89	      _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_exists(r_key);)
90              return std::make_pair(pos, pos_hash_pair.second);
91            }
92	  break;
93        default:
94	  _GLIBCXX_DEBUG_ASSERT(0);
95        };
96      resize_base::notify_insert_search_collision();
97    }
98  resize_base::notify_insert_search_end();
99  if (ins_pos == m_num_e)
100    __throw_insert_error();
101  return std::make_pair(ins_pos, pos_hash_pair.second);
102}
103
104PB_DS_CLASS_T_DEC
105inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
106PB_DS_CLASS_C_DEC::
107insert_imp(const_reference r_val, true_type)
108{
109  const_key_reference r_key = PB_DS_V2F(r_val);
110  comp_hash pos_hash_pair = find_ins_pos(r_key,
111					 traits_base::m_store_extra_indicator);
112
113  _GLIBCXX_DEBUG_ASSERT(pos_hash_pair.first < m_num_e);
114  entry_pointer p_e =& m_entries[pos_hash_pair.first];
115  if (p_e->m_stat == valid_entry_status)
116    {
117      _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_exists(r_key));
118      return std::make_pair(&p_e->m_value, false);
119    }
120
121  _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_does_not_exist(r_key));
122  return std::make_pair(insert_new_imp(r_val, pos_hash_pair), true);
123}
124
125