libstdc++

gp_hash_table_map_/insert_no_store_hash_fn_imps.hpp
Go to the documentation of this file.
1 // -*- C++ -*-
2
3 // Copyright (C) 2005-2013 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.
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 // 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.
19
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
23 // <http://www.gnu.org/licenses/>.
24
25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
26
27 // Permission to use, copy, modify, sell, and distribute this software
28 // is hereby granted without fee, provided that the above copyright
29 // notice appears in all copies, and that both that copyright notice
30 // and this permission notice appear in supporting documentation. None
31 // of the above authors, nor IBM Haifa Research Laboratories, make any
32 // representation about the suitability of this software for any
33 // purpose. It is provided "as is" without express or implied
34 // warranty.
35
36 /**
37 * @file gp_hash_table_map_/insert_no_store_hash_fn_imps.hpp
38 * Contains implementations of gp_ht_map_'s insert related functions,
39 * when the hash value is not stored.
40 */
41
42 PB_DS_CLASS_T_DEC
43 inline typename PB_DS_CLASS_C_DEC::size_type
44 PB_DS_CLASS_C_DEC::
45 find_ins_pos(key_const_reference r_key, false_type)
46 {
47 size_type hash = ranged_probe_fn_base::operator()(r_key);
48 size_type i;
49
50 /* The insertion position is initted to a non-legal value to indicate
51 * that it has not been initted yet.
52 */
53 size_type ins_pos = m_num_e;
54 resize_base::notify_insert_search_start();
55 for (i = 0; i < m_num_e; ++i)
56 {
57 const size_type pos = ranged_probe_fn_base::operator()(r_key, hash, i);
58 _GLIBCXX_DEBUG_ASSERT(pos < m_num_e);
59 entry* const p_e = m_entries + pos;
60 switch(p_e->m_stat)
61 {
62 case empty_entry_status:
63 {
64 resize_base::notify_insert_search_end();
65 PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
66 return (ins_pos == m_num_e) ? pos : ins_pos;
67 }
68 break;
69 case erased_entry_status:
70 if (ins_pos == m_num_e)
71 ins_pos = pos;
72 break;
73 case valid_entry_status:
74 if (hash_eq_fn_base::operator()(PB_DS_V2F(p_e->m_value), r_key))
75 {
76 resize_base::notify_insert_search_end();
77 PB_DS_CHECK_KEY_EXISTS(r_key)
78 return pos;
79 }
80 break;
81 default:
82 _GLIBCXX_DEBUG_ASSERT(0);
83 };
84
85 resize_base::notify_insert_search_collision();
86 }
87 resize_base::notify_insert_search_end();
88 if (ins_pos == m_num_e)
89 __throw_insert_error();
90 return ins_pos;
91 }
92
93 PB_DS_CLASS_T_DEC
94 inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
95 PB_DS_CLASS_C_DEC::
96 insert_imp(const_reference r_val, false_type)
97 {
98 key_const_reference r_key = PB_DS_V2F(r_val);
99 const size_type pos = find_ins_pos(r_key,
100 traits_base::m_store_extra_indicator);
101
102 if (m_entries[pos].m_stat == valid_entry_status)
103 {
104 PB_DS_CHECK_KEY_EXISTS(r_key)
105 return std::make_pair(&(m_entries + pos)->m_value, false);
106 }
107
108 PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
109 return std::make_pair(insert_new_imp(r_val, pos), true);
110 }
111