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287 lines
9.3 KiB
C++
287 lines
9.3 KiB
C++
// Profiling iterator implementation -*- C++ -*-
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// Copyright (C) 2009-2019 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file profile/iterator_tracker.h
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* This file is a GNU profile extension to the Standard C++ Library.
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*/
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#ifndef _GLIBCXX_PROFILE_ITERATOR_TRACKER
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#define _GLIBCXX_PROFILE_ITERATOR_TRACKER 1
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#include <ext/type_traits.h>
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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namespace __profile
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{
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template<typename _Iterator, typename _Sequence>
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class __iterator_tracker
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{
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typedef __iterator_tracker _Self;
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// The underlying iterator
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_Iterator _M_current;
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// The underlying data structure
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const _Sequence* _M_ds;
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typedef std::iterator_traits<_Iterator> _Traits;
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public:
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typedef _Iterator _Base_iterator;
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typedef typename _Traits::iterator_category iterator_category;
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typedef typename _Traits::value_type value_type;
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typedef typename _Traits::difference_type difference_type;
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typedef typename _Traits::reference reference;
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typedef typename _Traits::pointer pointer;
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__iterator_tracker() _GLIBCXX_NOEXCEPT
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: _M_current(), _M_ds(0) { }
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__iterator_tracker(const _Iterator& __i, const _Sequence* __seq)
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_GLIBCXX_NOEXCEPT
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: _M_current(__i), _M_ds(__seq) { }
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__iterator_tracker(const __iterator_tracker& __x) _GLIBCXX_NOEXCEPT
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: _M_current(__x._M_current), _M_ds(__x._M_ds) { }
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template<typename _MutableIterator>
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__iterator_tracker(const __iterator_tracker<_MutableIterator,
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typename __gnu_cxx::__enable_if
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<(std::__are_same<_MutableIterator, typename
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_Sequence::iterator::_Base_iterator>::__value),
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_Sequence>::__type>& __x) _GLIBCXX_NOEXCEPT
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: _M_current(__x.base()), _M_ds(__x._M_get_sequence()) { }
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_Iterator
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base() const _GLIBCXX_NOEXCEPT { return _M_current; }
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/**
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* @brief Conversion to underlying non-debug iterator to allow
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* better interaction with non-profile containers.
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*/
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operator _Iterator() const _GLIBCXX_NOEXCEPT { return _M_current; }
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pointer
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operator->() const _GLIBCXX_NOEXCEPT { return &*_M_current; }
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__iterator_tracker&
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operator++() _GLIBCXX_NOEXCEPT
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{
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_M_ds->_M_profile_iterate();
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++_M_current;
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return *this;
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}
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__iterator_tracker
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operator++(int) _GLIBCXX_NOEXCEPT
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{
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_M_ds->_M_profile_iterate();
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__iterator_tracker __tmp(*this);
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++_M_current;
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return __tmp;
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}
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__iterator_tracker&
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operator--() _GLIBCXX_NOEXCEPT
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{
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_M_ds->_M_profile_iterate(1);
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--_M_current;
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return *this;
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}
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__iterator_tracker
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operator--(int) _GLIBCXX_NOEXCEPT
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{
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_M_ds->_M_profile_iterate(1);
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__iterator_tracker __tmp(*this);
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--_M_current;
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return __tmp;
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}
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__iterator_tracker&
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operator=(const __iterator_tracker& __x) _GLIBCXX_NOEXCEPT
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{
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_M_current = __x._M_current;
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_M_ds = __x._M_ds;
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return *this;
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}
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reference
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operator*() const _GLIBCXX_NOEXCEPT
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{ return *_M_current; }
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// ------ Random access iterator requirements ------
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reference
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operator[](const difference_type& __n) const _GLIBCXX_NOEXCEPT
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{ return _M_current[__n]; }
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__iterator_tracker&
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operator+=(const difference_type& __n) _GLIBCXX_NOEXCEPT
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{
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_M_current += __n;
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return *this;
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}
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__iterator_tracker
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operator+(const difference_type& __n) const _GLIBCXX_NOEXCEPT
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{
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__iterator_tracker __tmp(*this);
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__tmp += __n;
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return __tmp;
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}
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__iterator_tracker&
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operator-=(const difference_type& __n) _GLIBCXX_NOEXCEPT
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{
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_M_current += -__n;
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return *this;
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}
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__iterator_tracker
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operator-(const difference_type& __n) const _GLIBCXX_NOEXCEPT
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{
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__iterator_tracker __tmp(*this);
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__tmp -= __n;
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return __tmp;
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}
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const _Sequence*
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_M_get_sequence() const
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{ return static_cast<const _Sequence*>(_M_ds); }
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};
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template<typename _IteratorL, typename _IteratorR, typename _Sequence>
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inline bool
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operator==(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
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const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() == __rhs.base(); }
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template<typename _Iterator, typename _Sequence>
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inline bool
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operator==(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
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const __iterator_tracker<_Iterator, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() == __rhs.base(); }
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template<typename _IteratorL, typename _IteratorR, typename _Sequence>
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inline bool
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operator!=(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
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const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() != __rhs.base(); }
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template<typename _Iterator, typename _Sequence>
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inline bool
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operator!=(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
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const __iterator_tracker<_Iterator, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() != __rhs.base(); }
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template<typename _IteratorL, typename _IteratorR, typename _Sequence>
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inline bool
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operator<(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
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const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() < __rhs.base(); }
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template<typename _Iterator, typename _Sequence>
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inline bool
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operator<(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
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const __iterator_tracker<_Iterator, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() < __rhs.base(); }
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template<typename _IteratorL, typename _IteratorR, typename _Sequence>
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inline bool
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operator<=(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
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const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() <= __rhs.base(); }
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template<typename _Iterator, typename _Sequence>
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inline bool
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operator<=(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
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const __iterator_tracker<_Iterator, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() <= __rhs.base(); }
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template<typename _IteratorL, typename _IteratorR, typename _Sequence>
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inline bool
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operator>(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
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const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() > __rhs.base(); }
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template<typename _Iterator, typename _Sequence>
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inline bool
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operator>(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
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const __iterator_tracker<_Iterator, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() > __rhs.base(); }
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template<typename _IteratorL, typename _IteratorR, typename _Sequence>
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inline bool
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operator>=(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
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const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() >= __rhs.base(); }
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template<typename _Iterator, typename _Sequence>
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inline bool
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operator>=(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
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const __iterator_tracker<_Iterator, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() >= __rhs.base(); }
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// According to the resolution of DR179 not only the various comparison
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// operators but also operator- must accept mixed iterator/const_iterator
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// parameters.
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template<typename _IteratorL, typename _IteratorR, typename _Sequence>
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inline typename __iterator_tracker<_IteratorL, _Sequence>::difference_type
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operator-(const __iterator_tracker<_IteratorL, _Sequence>& __lhs,
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const __iterator_tracker<_IteratorR, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() - __rhs.base(); }
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template<typename _Iterator, typename _Sequence>
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inline typename __iterator_tracker<_Iterator, _Sequence>::difference_type
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operator-(const __iterator_tracker<_Iterator, _Sequence>& __lhs,
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const __iterator_tracker<_Iterator, _Sequence>& __rhs)
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_GLIBCXX_NOEXCEPT
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{ return __lhs.base() - __rhs.base(); }
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template<typename _Iterator, typename _Sequence>
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inline __iterator_tracker<_Iterator, _Sequence>
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operator+(typename __iterator_tracker<_Iterator,_Sequence>::difference_type
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__n,
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const __iterator_tracker<_Iterator, _Sequence>& __i)
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_GLIBCXX_NOEXCEPT
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{ return __i + __n; }
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} // namespace __profile
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} // namespace std
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#endif
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