1 // Debugging iterator implementation (out of line) -*- C++ -*-
3 // Copyright (C) 2011-2021 Free Software Foundation, Inc.
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
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
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.
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/>.
25 /** @file debug/safe_local_iterator.tcc
26 * This file is a GNU debug extension to the Standard C++ Library.
29 #ifndef _GLIBCXX_DEBUG_SAFE_LOCAL_ITERATOR_TCC
30 #define _GLIBCXX_DEBUG_SAFE_LOCAL_ITERATOR_TCC 1
34 template<typename _Iterator, typename _Sequence>
35 typename _Distance_traits<_Iterator>::__type
36 _Safe_local_iterator<_Iterator, _Sequence>::
37 _M_get_distance_to(const _Safe_local_iterator& __rhs) const
39 if (base() == __rhs.base())
40 return { 0, __dp_exact };
44 if (__rhs._M_is_end())
47 _M_get_sequence()->bucket_size(bucket()),
51 return { 1, __dp_sign };
56 if (__rhs._M_is_begin())
59 -_M_get_sequence()->bucket_size(bucket()),
63 return { -1, __dp_sign };
66 if (__rhs._M_is_begin())
67 return { -1, __dp_sign };
69 if (__rhs._M_is_end())
70 return { 1, __dp_sign };
72 return { 1, __dp_equality };
75 template<typename _Iterator, typename _Sequence>
77 _Safe_local_iterator<_Iterator, _Sequence>::
78 _M_valid_range(const _Safe_local_iterator& __rhs,
79 std::pair<difference_type, _Distance_precision>& __dist) const
81 if (!_M_can_compare(__rhs))
84 if (bucket() != __rhs.bucket())
87 /* Determine if we can order the iterators without the help of
89 __dist = _M_get_distance_to(__rhs);
90 switch (__dist.second)
93 if (__dist.first == 0)
99 return __dist.first >= 0;
102 // Assume that this is a valid range; we can't check anything else
105 } // namespace __gnu_debug