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 erase_no_store_hash_fn_imps.hpp
44 * Contains implementations of cc_ht_map_'s erase related functions,
45 * when the hash value is not stored.
46 */
47
48PB_DS_CLASS_T_DEC
49inline bool
50PB_DS_CLASS_C_DEC::
51erase(const_key_reference r_key)
52{
53  _GLIBCXX_DEBUG_ONLY(assert_valid();)
54  return erase_in_pos_imp(r_key, ranged_hash_fn_base::operator()(r_key));
55}
56
57PB_DS_CLASS_T_DEC
58inline bool
59PB_DS_CLASS_C_DEC::
60erase_in_pos_imp(const_key_reference r_key, size_type pos)
61{
62  _GLIBCXX_DEBUG_ONLY(assert_valid();)
63  entry_pointer p_e = m_entries[pos];
64  resize_base::notify_erase_search_start();
65  if (p_e == NULL)
66    {
67      resize_base::notify_erase_search_end();
68      _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_does_not_exist(r_key);)
69      _GLIBCXX_DEBUG_ONLY(assert_valid();)
70      return false;
71    }
72
73  if (hash_eq_fn_base::operator()(PB_DS_V2F(p_e->m_value), r_key))
74    {
75      resize_base::notify_erase_search_end();
76      _GLIBCXX_DEBUG_ONLY(map_debug_base:: check_key_exists(r_key);)
77      erase_entry_pointer(m_entries[pos]);
78      do_resize_if_needed_no_throw();
79      _GLIBCXX_DEBUG_ONLY(assert_valid();)
80      return true;
81    }
82
83  while (true)
84    {
85      entry_pointer p_next_e = p_e->m_p_next;
86      if (p_next_e == NULL)
87        {
88	  resize_base::notify_erase_search_end();
89	  _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_does_not_exist(r_key);)
90          _GLIBCXX_DEBUG_ONLY(assert_valid();)
91          return false;
92        }
93
94      if (hash_eq_fn_base::operator()(PB_DS_V2F(p_next_e->m_value), r_key))
95        {
96	  resize_base::notify_erase_search_end();
97	  _GLIBCXX_DEBUG_ONLY(map_debug_base::check_key_exists(r_key);)
98          erase_entry_pointer(p_e->m_p_next);
99	  do_resize_if_needed_no_throw();
100	  _GLIBCXX_DEBUG_ONLY(assert_valid();)
101          return true;
102        }
103      resize_base::notify_erase_search_collision();
104      p_e = p_next_e;
105    }
106}
107
108