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4569a895 AT |
1 | // -*- C++ -*- |
2 | ||
8d9254fc | 3 | // Copyright (C) 2005-2020 Free Software Foundation, Inc. |
4569a895 AT |
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 | |
748086b7 | 8 | // Foundation; either version 3, or (at your option) any later |
4569a895 AT |
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 | ||
748086b7 JJ |
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. | |
4569a895 | 19 | |
748086b7 JJ |
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/>. | |
4569a895 AT |
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 | /** | |
a345e45d | 37 | * @file splay_tree_/erase_fn_imps.hpp |
4569a895 AT |
38 | * Contains an implementation class for splay_tree_. |
39 | */ | |
40 | ||
574dfb67 JW |
41 | #ifdef PB_DS_CLASS_C_DEC |
42 | ||
4569a895 AT |
43 | PB_DS_CLASS_T_DEC |
44 | inline bool | |
45 | PB_DS_CLASS_C_DEC:: | |
a345e45d | 46 | erase(key_const_reference r_key) |
4569a895 AT |
47 | { |
48 | point_iterator it = find(r_key); | |
1b24692f BK |
49 | if (it == base_type::end()) |
50 | return false; | |
4569a895 | 51 | erase(it); |
1b24692f | 52 | return true; |
4569a895 AT |
53 | } |
54 | ||
55 | PB_DS_CLASS_T_DEC | |
56 | inline typename PB_DS_CLASS_C_DEC::iterator | |
57 | PB_DS_CLASS_C_DEC:: | |
58 | erase(iterator it) | |
59 | { | |
f5886803 | 60 | PB_DS_ASSERT_VALID((*this)) |
1b24692f BK |
61 | if (it == base_type::end()) |
62 | return it; | |
4569a895 | 63 | iterator ret_it = it; |
4569a895 | 64 | ++ret_it; |
4569a895 | 65 | erase_node(it.m_p_nd); |
f5886803 | 66 | PB_DS_ASSERT_VALID((*this)) |
1b24692f | 67 | return ret_it; |
4569a895 AT |
68 | } |
69 | ||
70 | PB_DS_CLASS_T_DEC | |
71 | inline typename PB_DS_CLASS_C_DEC::reverse_iterator | |
72 | PB_DS_CLASS_C_DEC:: | |
73 | erase(reverse_iterator it) | |
74 | { | |
f5886803 | 75 | PB_DS_ASSERT_VALID((*this)) |
1b24692f | 76 | if (it.m_p_nd == base_type::m_p_head) |
4569a895 | 77 | return (it); |
4569a895 | 78 | reverse_iterator ret_it = it; |
4569a895 | 79 | ++ret_it; |
4569a895 | 80 | erase_node(it.m_p_nd); |
f5886803 | 81 | PB_DS_ASSERT_VALID((*this)) |
1b24692f | 82 | return ret_it; |
4569a895 AT |
83 | } |
84 | ||
85 | PB_DS_CLASS_T_DEC | |
86 | template<typename Pred> | |
87 | inline typename PB_DS_CLASS_C_DEC::size_type | |
88 | PB_DS_CLASS_C_DEC:: | |
89 | erase_if(Pred pred) | |
90 | { | |
f5886803 | 91 | PB_DS_ASSERT_VALID((*this)) |
1b24692f BK |
92 | size_type num_ersd = 0; |
93 | iterator it = base_type::begin(); | |
94 | while (it != base_type::end()) | |
4569a895 AT |
95 | { |
96 | if (pred(*it)) | |
97 | { | |
98 | ++num_ersd; | |
4569a895 AT |
99 | it = erase(it); |
100 | } | |
101 | else | |
102 | ++it; | |
103 | } | |
f5886803 | 104 | PB_DS_ASSERT_VALID((*this)) |
1b24692f | 105 | return num_ersd; |
4569a895 AT |
106 | } |
107 | ||
108 | PB_DS_CLASS_T_DEC | |
109 | void | |
110 | PB_DS_CLASS_C_DEC:: | |
111 | erase_node(node_pointer p_nd) | |
112 | { | |
8fc81078 | 113 | _GLIBCXX_DEBUG_ASSERT(p_nd != 0); |
4569a895 AT |
114 | splay(p_nd); |
115 | ||
f5886803 | 116 | PB_DS_ASSERT_VALID((*this)) |
1b24692f | 117 | _GLIBCXX_DEBUG_ASSERT(p_nd == this->m_p_head->m_p_parent); |
4569a895 AT |
118 | |
119 | node_pointer p_l = p_nd->m_p_left; | |
120 | node_pointer p_r = p_nd->m_p_right; | |
121 | ||
1b24692f BK |
122 | base_type::update_min_max_for_erased_node(p_nd); |
123 | base_type::actual_erase_node(p_nd); | |
8fc81078 | 124 | if (p_r == 0) |
4569a895 | 125 | { |
1b24692f | 126 | base_type::m_p_head->m_p_parent = p_l; |
8fc81078 | 127 | if (p_l != 0) |
1b24692f | 128 | p_l->m_p_parent = base_type::m_p_head; |
f5886803 | 129 | PB_DS_ASSERT_VALID((*this)) |
1b24692f | 130 | return; |
4569a895 AT |
131 | } |
132 | ||
133 | node_pointer p_target_r = leftmost(p_r); | |
8fc81078 | 134 | _GLIBCXX_DEBUG_ASSERT(p_target_r != 0); |
1b24692f BK |
135 | p_r->m_p_parent = base_type::m_p_head; |
136 | base_type::m_p_head->m_p_parent = p_r; | |
4569a895 AT |
137 | splay(p_target_r); |
138 | ||
8fc81078 | 139 | _GLIBCXX_DEBUG_ONLY(p_target_r->m_p_left = 0); |
47bea7b8 | 140 | _GLIBCXX_DEBUG_ASSERT(p_target_r->m_p_parent == this->m_p_head); |
1b24692f | 141 | _GLIBCXX_DEBUG_ASSERT(this->m_p_head->m_p_parent == p_target_r); |
4569a895 AT |
142 | |
143 | p_target_r->m_p_left = p_l; | |
8fc81078 | 144 | if (p_l != 0) |
4569a895 | 145 | p_l->m_p_parent = p_target_r; |
f5886803 | 146 | PB_DS_ASSERT_VALID((*this)) |
a345e45d | 147 | this->apply_update(p_target_r, (node_update*)this); |
4569a895 AT |
148 | } |
149 | ||
150 | PB_DS_CLASS_T_DEC | |
151 | inline typename PB_DS_CLASS_C_DEC::node_pointer | |
152 | PB_DS_CLASS_C_DEC:: | |
153 | leftmost(node_pointer p_nd) | |
154 | { | |
8fc81078 PC |
155 | _GLIBCXX_DEBUG_ASSERT(p_nd != 0); |
156 | while (p_nd->m_p_left != 0) | |
4569a895 | 157 | p_nd = p_nd->m_p_left; |
1b24692f | 158 | return p_nd; |
4569a895 | 159 | } |
574dfb67 | 160 | #endif |