libstdc++

gp_hash_table_map_/insert_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_store_hash_fn_imps.hpp
38 * Contains implementations of gp_ht_map_'s find related functions,
39 * when the hash value is stored.
40 */
41
42 PB_DS_CLASS_T_DEC
43 inline typename PB_DS_CLASS_C_DEC::comp_hash
44 PB_DS_CLASS_C_DEC::
45 find_ins_pos(key_const_reference r_key, true_type)
46 {
47 PB_DS_ASSERT_VALID((*this))
48 comp_hash pos_hash_pair = ranged_probe_fn_base::operator()(r_key);
49
50 size_type i;
51
52 /* The insertion position is initted to a non-legal value to indicate
53 * that it has not been initted yet.
54 */
55 size_type ins_pos = m_num_e;
56 resize_base::notify_insert_search_start();
57 for (i = 0; i < m_num_e; ++i)
58 {
59 const size_type pos = ranged_probe_fn_base::operator()(r_key, pos_hash_pair.second, i);
60
61 entry* const p_e = m_entries + pos;
62 switch(p_e->m_stat)
63 {
64 case empty_entry_status:
65 {
66 resize_base::notify_insert_search_end();
67 PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
68
69 return ((ins_pos == m_num_e) ?
70 std::make_pair(pos, pos_hash_pair.second) :
71 std::make_pair(ins_pos, pos_hash_pair.second));
72 }
73 break;
74 case erased_entry_status:
75 if (ins_pos == m_num_e)
76 ins_pos = pos;
77 break;
78 case valid_entry_status:
79 if (hash_eq_fn_base::operator()(PB_DS_V2F(p_e->m_value), p_e->m_hash,
80 r_key, pos_hash_pair.second))
81 {
82 resize_base::notify_insert_search_end();
83 PB_DS_CHECK_KEY_EXISTS(r_key)
84 return std::make_pair(pos, pos_hash_pair.second);
85 }
86 break;
87 default:
88 _GLIBCXX_DEBUG_ASSERT(0);
89 };
90 resize_base::notify_insert_search_collision();
91 }
92 resize_base::notify_insert_search_end();
93 if (ins_pos == m_num_e)
94 __throw_insert_error();
95 return std::make_pair(ins_pos, pos_hash_pair.second);
96 }
97
98 PB_DS_CLASS_T_DEC
99 inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
100 PB_DS_CLASS_C_DEC::
101 insert_imp(const_reference r_val, true_type)
102 {
103 key_const_reference r_key = PB_DS_V2F(r_val);
104 comp_hash pos_hash_pair = find_ins_pos(r_key,
105 traits_base::m_store_extra_indicator);
106
107 _GLIBCXX_DEBUG_ASSERT(pos_hash_pair.first < m_num_e);
108 entry_pointer p_e =& m_entries[pos_hash_pair.first];
109 if (p_e->m_stat == valid_entry_status)
110 {
111 PB_DS_CHECK_KEY_EXISTS(r_key)
112 return std::make_pair(&p_e->m_value, false);
113 }
114
115 PB_DS_CHECK_KEY_DOES_NOT_EXIST(r_key)
116 return std::make_pair(insert_new_imp(r_val, pos_hash_pair), true);
117 }
118