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
48 PB_DS_CLASS_T_DEC
49 inline typename PB_DS_CLASS_C_DEC::size_type
50 PB_DS_CLASS_C_DEC::
find_ins_pos(const_key_reference r_key,false_type)51 find_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
99 PB_DS_CLASS_T_DEC
100 inline std::pair<typename PB_DS_CLASS_C_DEC::point_iterator, bool>
101 PB_DS_CLASS_C_DEC::
insert_imp(const_reference r_val,false_type)102 insert_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