Filename: //usr/include/c++/10////bits//list.tcc

// List implementation (out of line) -*- C++ -*- // Copyright (C) 2001-2020 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /* * * Copyright (c) 1994 * Hewlett-Packard Company * * Permission to use, copy, modify, distribute and sell this software * and its documentation for any purpose is hereby granted without fee, * provided that the above copyright notice appear in all copies and * that both that copyright notice and this permission notice appear * in supporting documentation. Hewlett-Packard Company makes no * representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied warranty. * * * Copyright (c) 1996,1997 * Silicon Graphics Computer Systems, Inc. * * Permission to use, copy, modify, distribute and sell this software * and its documentation for any purpose is hereby granted without fee, * provided that the above copyright notice appear in all copies and * that both that copyright notice and this permission notice appear * in supporting documentation. Silicon Graphics makes no * representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied warranty. */ /** @file bits/list.tcc * This is an internal header file, included by other library headers. * Do not attempt to use it directly. @headername{list} */ #ifndef _LIST_TCC #define _LIST_TCC 1 namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION _GLIBCXX_BEGIN_NAMESPACE_CONTAINER template<typename _Tp, typename _Alloc> void _List_base<_Tp, _Alloc>:: _M_clear() _GLIBCXX_NOEXCEPT { typedef _List_node<_Tp> _Node; __detail::_List_node_base* __cur = _M_impl._M_node._M_next; while (__cur != &_M_impl._M_node) { _Node* __tmp = static_cast<_Node*>(__cur); __cur = __tmp->_M_next; _Tp* __val = __tmp->_M_valptr(); #if __cplusplus >= 201103L _Node_alloc_traits::destroy(_M_get_Node_allocator(), __val); #else _Tp_alloc_type(_M_get_Node_allocator()).destroy(__val); #endif _M_put_node(__tmp); } } #if __cplusplus >= 201103L template<typename _Tp, typename _Alloc> template<typename... _Args> typename list<_Tp, _Alloc>::iterator list<_Tp, _Alloc>:: emplace(const_iterator __position, _Args&&... __args) { _Node* __tmp = _M_create_node(std::forward<_Args>(__args)...); __tmp->_M_hook(__position._M_const_cast()._M_node); this->_M_inc_size(1); return iterator(__tmp); } #endif template<typename _Tp, typename _Alloc> typename list<_Tp, _Alloc>::iterator list<_Tp, _Alloc>:: #if __cplusplus >= 201103L insert(const_iterator __position, const value_type& __x) #else insert(iterator __position, const value_type& __x) #endif { _Node* __tmp = _M_create_node(__x); __tmp->_M_hook(__position._M_const_cast()._M_node); this->_M_inc_size(1); return iterator(__tmp); } #if __cplusplus >= 201103L template<typename _Tp, typename _Alloc> typename list<_Tp, _Alloc>::iterator list<_Tp, _Alloc>:: insert(const_iterator __position, size_type __n, const value_type& __x) { if (__n) { list __tmp(__n, __x, get_allocator()); iterator __it = __tmp.begin(); splice(__position, __tmp); return __it; } return __position._M_const_cast(); } template<typename _Tp, typename _Alloc> template<typename _InputIterator, typename> typename list<_Tp, _Alloc>::iterator list<_Tp, _Alloc>:: insert(const_iterator __position, _InputIterator __first, _InputIterator __last) { list __tmp(__first, __last, get_allocator()); if (!__tmp.empty()) { iterator __it = __tmp.begin(); splice(__position, __tmp); return __it; } return __position._M_const_cast(); } #endif template<typename _Tp, typename _Alloc> typename list<_Tp, _Alloc>::iterator list<_Tp, _Alloc>:: #if __cplusplus >= 201103L erase(const_iterator __position) noexcept #else erase(iterator __position) #endif { iterator __ret = iterator(__position._M_node->_M_next); _M_erase(__position._M_const_cast()); return __ret; } // Return a const_iterator indicating the position to start inserting or // erasing elements (depending whether the list is growing or shrinking), // and set __new_size to the number of new elements that must be appended. // Equivalent to the following, but performed optimally: // if (__new_size < size()) { // __new_size = 0; // return std::next(begin(), __new_size); // } else { // __newsize -= size(); // return end(); // } template<typename _Tp, typename _Alloc> typename list<_Tp, _Alloc>::const_iterator list<_Tp, _Alloc>:: _M_resize_pos(size_type& __new_size) const { const_iterator __i; #if _GLIBCXX_USE_CXX11_ABI const size_type __len = size(); if (__new_size < __len) { if (__new_size <= __len / 2) { __i = begin(); std::advance(__i, __new_size); } else { __i = end(); ptrdiff_t __num_erase = __len - __new_size; std::advance(__i, -__num_erase); } __new_size = 0; return __i; } else __i = end(); #else size_type __len = 0; for (__i = begin(); __i != end() && __len < __new_size; ++__i, ++__len) ; #endif __new_size -= __len; return __i; } #if __cplusplus >= 201103L template<typename _Tp, typename _Alloc> void list<_Tp, _Alloc>:: _M_default_append(size_type __n) { size_type __i = 0; __try { for (; __i < __n; ++__i) emplace_back(); } __catch(...) { for (; __i; --__i) pop_back(); __throw_exception_again; } } template<typename _Tp, typename _Alloc> void list<_Tp, _Alloc>:: resize(size_type __new_size) { const_iterator __i = _M_resize_pos(__new_size); if (__new_size) _M_default_append(__new_size); else erase(__i, end()); } template<typename _Tp, typename _Alloc> void list<_Tp, _Alloc>:: resize(size_type __new_size, const value_type& __x) { const_iterator __i = _M_resize_pos(__new_size); if (__new_size) insert(end(), __new_size, __x); else erase(__i, end()); } #else template<typename _Tp, typename _Alloc> void list<_Tp, _Alloc>:: resize(size_type __new_size, value_type __x) { const_iterator __i = _M_resize_pos(__new_size); if (__new_size) insert(end(), __new_size, __x); else erase(__i._M_const_cast(), end()); } #endif template<typename _Tp, typename _Alloc> list<_Tp, _Alloc>& list<_Tp, _Alloc>:: operator=(const list& __x) { if (this != std::__addressof(__x)) { #if __cplusplus >= 201103L if (_Node_alloc_traits::_S_propagate_on_copy_assign()) { auto& __this_alloc = this->_M_get_Node_allocator(); auto& __that_alloc = __x._M_get_Node_allocator(); if (!_Node_alloc_traits::_S_always_equal() && __this_alloc != __that_alloc) { // replacement allocator cannot free existing storage clear(); } std::__alloc_on_copy(__this_alloc, __that_alloc); } #endif _M_assign_dispatch(__x.begin(), __x.end(), __false_type()); } return *this; } template<typename _Tp, typename _Alloc> void list<_Tp, _Alloc>:: _M_fill_assign(size_type __n, const value_type& __val) { iterator __i = begin(); for (; __i != end() && __n > 0; ++__i, --__n) *__i = __val; if (__n > 0) insert(end(), __n, __val); else erase(__i, end()); } template<typename _Tp, typename _Alloc> template <typename _InputIterator> void list<_Tp, _Alloc>:: _M_assign_dispatch(_InputIterator __first2, _InputIterator __last2, __false_type) { iterator __first1 = begin(); iterator __last1 = end(); for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void)++__first2) *__first1 = *__first2; if (__first2 == __last2) erase(__first1, __last1); else insert(__last1, __first2, __last2); } #if __cplusplus > 201703L # define _GLIBCXX20_ONLY(__expr) __expr #else # define _GLIBCXX20_ONLY(__expr) #endif template<typename _Tp, typename _Alloc> typename list<_Tp, _Alloc>::__remove_return_type list<_Tp, _Alloc>:: remove(const value_type& __value) { size_type __removed __attribute__((__unused__)) = 0; iterator __first = begin(); iterator __last = end(); iterator __extra = __last; while (__first != __last) { iterator __next = __first; ++__next; if (*__first == __value) { // _GLIBCXX_RESOLVE_LIB_DEFECTS // 526. Is it undefined if a function in the standard changes // in parameters? if (std::__addressof(*__first) != std::__addressof(__value)) { _M_erase(__first); _GLIBCXX20_ONLY( __removed++ ); } else __extra = __first; } __first = __next; } if (__extra != __last) { _M_erase(__extra); _GLIBCXX20_ONLY( __removed++ ); } return _GLIBCXX20_ONLY( __removed ); } template<typename _Tp, typename _Alloc> typename list<_Tp, _Alloc>::__remove_return_type list<_Tp, _Alloc>:: unique() { iterator __first = begin(); iterator __last = end(); if (__first == __last) return _GLIBCXX20_ONLY( 0 ); size_type __removed __attribute__((__unused__)) = 0; iterator __next = __first; while (++__next != __last) { if (*__first == *__next) { _M_erase(__next); _GLIBCXX20_ONLY( __removed++ ); } else __first = __next; __next = __first; } return _GLIBCXX20_ONLY( __removed ); } template<typename _Tp, typename _Alloc> void list<_Tp, _Alloc>:: #if __cplusplus >= 201103L merge(list&& __x) #else merge(list& __x) #endif { // _GLIBCXX_RESOLVE_LIB_DEFECTS // 300. list::merge() specification incomplete if (this != std::__addressof(__x)) { _M_check_equal_allocators(__x); iterator __first1 = begin(); iterator __last1 = end(); iterator __first2 = __x.begin(); iterator __last2 = __x.end(); const size_t __orig_size = __x.size(); __try { while (__first1 != __last1 && __first2 != __last2) if (*__first2 < *__first1) { iterator __next = __first2; _M_transfer(__first1, __first2, ++__next); __first2 = __next; } else ++__first1; if (__first2 != __last2) _M_transfer(__last1, __first2, __last2); this->_M_inc_size(__x._M_get_size()); __x._M_set_size(0); } __catch(...) { const size_t __dist = std::distance(__first2, __last2); this->_M_inc_size(__orig_size - __dist); __x._M_set_size(__dist); __throw_exception_again; } } } template<typename _Tp, typename _Alloc> template <typename _StrictWeakOrdering> void list<_Tp, _Alloc>:: #if __cplusplus >= 201103L merge(list&& __x, _StrictWeakOrdering __comp) #else merge(list& __x, _StrictWeakOrdering __comp) #endif { // _GLIBCXX_RESOLVE_LIB_DEFECTS // 300. list::merge() specification incomplete if (this != std::__addressof(__x)) { _M_check_equal_allocators(__x); iterator __first1 = begin(); iterator __last1 = end(); iterator __first2 = __x.begin(); iterator __last2 = __x.end(); const size_t __orig_size = __x.size(); __try { while (__first1 != __last1 && __first2 != __last2) if (__comp(*__first2, *__first1)) { iterator __next = __first2; _M_transfer(__first1, __first2, ++__next); __first2 = __next; } else ++__first1; if (__first2 != __last2) _M_transfer(__last1, __first2, __last2); this->_M_inc_size(__x._M_get_size()); __x._M_set_size(0); } __catch(...) { const size_t __dist = std::distance(__first2, __last2); this->_M_inc_size(__orig_size - __dist); __x._M_set_size(__dist); __throw_exception_again; } } } template<typename _Tp, typename _Alloc> void list<_Tp, _Alloc>:: sort() { // Do nothing if the list has length 0 or 1. if (this->_M_impl._M_node._M_next != &this->_M_impl._M_node && this->_M_impl._M_node._M_next->_M_next != &this->_M_impl._M_node) { list __carry; list __tmp[64]; list * __fill = __tmp; list * __counter; __try { do { __carry.splice(__carry.begin(), *this, begin()); for(__counter = __tmp; __counter != __fill && !__counter->empty(); ++__counter) { __counter->merge(__carry); __carry.swap(*__counter); } __carry.swap(*__counter); if (__counter == __fill) ++__fill; } while ( !empty() ); for (__counter = __tmp + 1; __counter != __fill; ++__counter) __counter->merge(*(__counter - 1)); swap( *(__fill - 1) ); } __catch(...) { this->splice(this->end(), __carry); for (int __i = 0; __i < sizeof(__tmp)/sizeof(__tmp[0]); ++__i) this->splice(this->end(), __tmp[__i]); __throw_exception_again; } } } template<typename _Tp, typename _Alloc> template <typename _Predicate> typename list<_Tp, _Alloc>::__remove_return_type list<_Tp, _Alloc>:: remove_if(_Predicate __pred) { size_type __removed __attribute__((__unused__)) = 0; iterator __first = begin(); iterator __last = end(); while (__first != __last) { iterator __next = __first; ++__next; if (__pred(*__first)) { _M_erase(__first); _GLIBCXX20_ONLY( __removed++ ); } __first = __next; } return _GLIBCXX20_ONLY( __removed ); } template<typename _Tp, typename _Alloc> template <typename _BinaryPredicate> typename list<_Tp, _Alloc>::__remove_return_type list<_Tp, _Alloc>:: unique(_BinaryPredicate __binary_pred) { iterator __first = begin(); iterator __last = end(); if (__first == __last) return _GLIBCXX20_ONLY(0); size_type __removed __attribute__((__unused__)) = 0; iterator __next = __first; while (++__next != __last) { if (__binary_pred(*__first, *__next)) { _M_erase(__next); _GLIBCXX20_ONLY( __removed++ ); } else __first = __next; __next = __first; } return _GLIBCXX20_ONLY( __removed ); } #undef _GLIBCXX20_ONLY template<typename _Tp, typename _Alloc> template <typename _StrictWeakOrdering> void list<_Tp, _Alloc>:: sort(_StrictWeakOrdering __comp) { // Do nothing if the list has length 0 or 1. if (this->_M_impl._M_node._M_next != &this->_M_impl._M_node && this->_M_impl._M_node._M_next->_M_next != &this->_M_impl._M_node) { list __carry; list __tmp[64]; list * __fill = __tmp; list * __counter; __try { do { __carry.splice(__carry.begin(), *this, begin()); for(__counter = __tmp; __counter != __fill && !__counter->empty(); ++__counter) { __counter->merge(__carry, __comp); __carry.swap(*__counter); } __carry.swap(*__counter); if (__counter == __fill) ++__fill; } while ( !empty() ); for (__counter = __tmp + 1; __counter != __fill; ++__counter) __counter->merge(*(__counter - 1), __comp); swap(*(__fill - 1)); } __catch(...) { this->splice(this->end(), __carry); for (int __i = 0; __i < sizeof(__tmp)/sizeof(__tmp[0]); ++__i) this->splice(this->end(), __tmp[__i]); __throw_exception_again; } } } _GLIBCXX_END_NAMESPACE_CONTAINER _GLIBCXX_END_NAMESPACE_VERSION } // namespace std #endif /* _LIST_TCC */

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