libstdc++
gp_hash_table_map_/erase_no_store_hash_fn_imps.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005, 2006, 2009, 2011 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
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20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 
25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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27 // Permission to use, copy, modify, sell, and distribute this software
28 // is hereby granted without fee, provided that the above copyright
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35 
36 /**
37  * @file gp_hash_table_map_/erase_no_store_hash_fn_imps.hpp
38  * Contains implementations of gp_ht_map_'s erase related functions,
39  * when the hash value is not stored.
40  */
41 
42 PB_DS_CLASS_T_DEC
43 inline bool
44 PB_DS_CLASS_C_DEC::
45 erase_imp(key_const_reference r_key, false_type)
46 {
47  PB_DS_ASSERT_VALID((*this))
48  size_type hash = ranged_probe_fn_base::operator()(r_key);
49  size_type i;
50  resize_base::notify_erase_search_start();
51 
52  for (i = 0; i < m_num_e; ++i)
53  {
54  const size_type pos = ranged_probe_fn_base::operator()(r_key, hash, i);
55  entry* const p_e = m_entries + pos;
56  switch(p_e->m_stat)
57  {
58  case empty_entry_status:
59  {
60  resize_base::notify_erase_search_end();
61  PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
62  return false;
63  }
64  break;
65  case valid_entry_status:
66  if (hash_eq_fn_base::operator()(PB_DS_V2F(p_e->m_value), r_key))
67  {
68  resize_base::notify_erase_search_end();
69  erase_entry(p_e);
70  do_resize_if_needed_no_throw();
71  return true;
72  }
73  break;
74  case erased_entry_status:
75  break;
76  default:
77  _GLIBCXX_DEBUG_ASSERT(0);
78  };
79  resize_base::notify_erase_search_collision();
80  }
81  resize_base::notify_erase_search_end();
82  return false;
83 }
84