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.
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// 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
18// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
19// MA 02111-1307, USA.
20
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
25// produce an executable, this file does not by itself cause the
26// resulting executable to be covered by the GNU General Public
27// License.  This exception does not however invalidate any other
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.
32
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
36// and this permission notice appear in supporting documentation. None
37// of the above authors, nor IBM Haifa Research Laboratories, make any
38// representation about the suitability of this software for any
39// purpose. It is provided "as is" without express or implied
40// warranty.
41
42/**
43 * @file insert_no_store_hash_fn_imps.hpp
44 * Contains implementations of gp_ht_map_'s insert related functions,
45 * when the hash value is not stored.
46 */
47
48PB_DS_CLASS_T_DEC
49inline typename PB_DS_CLASS_C_DEC::size_type
50PB_DS_CLASS_C_DEC::
51find_ins_pos(const_key_reference r_key, false_type)
52{
53  size_type hash = ranged_probe_fn_base::operator()(r_key);
54  size_type i;
55
56  /* The insertion position is initted to a non-legal value to indicate
57   *     that it has not been initted yet.
58   */
59  size_type ins_pos = m_num_e;
60  resize_base::notify_insert_search_start();
61  for (i = 0; i < m_num_e; ++i)
62    {
63      const size_type pos = ranged_probe_fn_base::operator()(r_key, hash, i);
64      _GLIBCXX_DEBUG_ASSERT(pos < m_num_e);
65      entry* const p_e = m_entries + pos;
66      switch(p_e->m_stat)
67        {
68        case empty_entry_status:
69	  {
70            resize_base::notify_insert_search_end();
71            _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_does_not_exist(r_key);)
72	    return (ins_pos == m_num_e) ? pos : ins_pos;
73	  }
74	  break;
75        case erased_entry_status:
76	  if (ins_pos == m_num_e)
77	    ins_pos = pos;
78	  break;
79        case valid_entry_status:
80	  if (hash_eq_fn_base::operator()(PB_DS_V2F(p_e->m_value), r_key))
81            {
82	      resize_base::notify_insert_search_end();
83	      _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_exists(r_key);)
84                return pos;
85            }
86	  break;
87        default:
88	  _GLIBCXX_DEBUG_ASSERT(0);
89        };
90
91      resize_base::notify_insert_search_collision();
92    }
93  resize_base::notify_insert_search_end();
94  if (ins_pos == m_num_e)
95    __throw_insert_error();
96  return ins_pos;
97}
98
99PB_DS_CLASS_T_DEC
100inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
101PB_DS_CLASS_C_DEC::
102insert_imp(const_reference r_val, false_type)
103{
104  const_key_reference r_key = PB_DS_V2F(r_val);
105  const size_type pos = find_ins_pos(r_key,
106				     traits_base::m_store_extra_indicator);
107
108  if (m_entries[pos].m_stat == valid_entry_status)
109    {
110      _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_exists(r_key);)
111      return std::make_pair(&(m_entries + pos)->m_value, false);
112    }
113
114  _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_does_not_exist(r_key));
115  return std::make_pair(insert_new_imp(r_val, pos), true);
116}
117
118