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gcc/libstdc++-v3/include/bits/vector.tcc
Jonathan Wakely 681707ec28 libstdc++: Do not allocate a zero-size vector<bool> [PR 100153] 
The vector<bool>::shrink_to_fit() implementation will allocate new
storage even if the vector is empty. That then leads to the
end-of-storage pointer being non-null and equal to the _M_start._M_p
pointer, which means that _M_end_addr() has undefined behaviour.

The fix is to stop doing a useless zero-sized allocation in
shrink_to_fit(), so that _M_start._M_p and _M_end_of_storage are both
null after an empty vector shrinks.

Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

libstdc++-v3/ChangeLog:

	PR libstdc++/100153
	* include/bits/vector.tcc (vector<bool>::_M_shrink_to_fit()):
	When size() is zero just deallocate and reset.
2021-10-01 20:34:46 +01:00

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// Vector implementation (out of line) -*- C++ -*-
// Copyright (C) 2001-2021 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
* 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/vector.tcc
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{vector}
*/
#ifndef _VECTOR_TCC
#define _VECTOR_TCC 1
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
_GLIBCXX_BEGIN_NAMESPACE_CONTAINER
template<typename _Tp, typename _Alloc>
void
vector<_Tp, _Alloc>::
reserve(size_type __n)
{
if (__n > this->max_size())
__throw_length_error(__N("vector::reserve"));
if (this->capacity() < __n)
{
const size_type __old_size = size();
pointer __tmp;
#if __cplusplus >= 201103L
if _GLIBCXX17_CONSTEXPR (_S_use_relocate())
{
__tmp = this->_M_allocate(__n);
_S_relocate(this->_M_impl._M_start, this->_M_impl._M_finish,
__tmp, _M_get_Tp_allocator());
}
else
#endif
{
__tmp = _M_allocate_and_copy(__n,
_GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(this->_M_impl._M_start),
_GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(this->_M_impl._M_finish));
std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
_M_get_Tp_allocator());
}
_GLIBCXX_ASAN_ANNOTATE_REINIT;
_M_deallocate(this->_M_impl._M_start,
this->_M_impl._M_end_of_storage
- this->_M_impl._M_start);
this->_M_impl._M_start = __tmp;
this->_M_impl._M_finish = __tmp + __old_size;
this->_M_impl._M_end_of_storage = this->_M_impl._M_start + __n;
}
}
#if __cplusplus >= 201103L
template<typename _Tp, typename _Alloc>
template<typename... _Args>
#if __cplusplus > 201402L
typename vector<_Tp, _Alloc>::reference
#else
void
#endif
vector<_Tp, _Alloc>::
emplace_back(_Args&&... __args)
{
if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
{
_GLIBCXX_ASAN_ANNOTATE_GROW(1);
_Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
std::forward<_Args>(__args)...);
++this->_M_impl._M_finish;
_GLIBCXX_ASAN_ANNOTATE_GREW(1);
}
else
_M_realloc_insert(end(), std::forward<_Args>(__args)...);
#if __cplusplus > 201402L
return back();
#endif
}
#endif
template<typename _Tp, typename _Alloc>
typename vector<_Tp, _Alloc>::iterator
vector<_Tp, _Alloc>::
#if __cplusplus >= 201103L
insert(const_iterator __position, const value_type& __x)
#else
insert(iterator __position, const value_type& __x)
#endif
{
const size_type __n = __position - begin();
if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
if (__position == end())
{
_GLIBCXX_ASAN_ANNOTATE_GROW(1);
_Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
__x);
++this->_M_impl._M_finish;
_GLIBCXX_ASAN_ANNOTATE_GREW(1);
}
else
{
#if __cplusplus >= 201103L
const auto __pos = begin() + (__position - cbegin());
// __x could be an existing element of this vector, so make a
// copy of it before _M_insert_aux moves elements around.
_Temporary_value __x_copy(this, __x);
_M_insert_aux(__pos, std::move(__x_copy._M_val()));
#else
_M_insert_aux(__position, __x);
#endif
}
else
#if __cplusplus >= 201103L
_M_realloc_insert(begin() + (__position - cbegin()), __x);
#else
_M_realloc_insert(__position, __x);
#endif
return iterator(this->_M_impl._M_start + __n);
}
template<typename _Tp, typename _Alloc>
typename vector<_Tp, _Alloc>::iterator
vector<_Tp, _Alloc>::
_M_erase(iterator __position)
{
if (__position + 1 != end())
_GLIBCXX_MOVE3(__position + 1, end(), __position);
--this->_M_impl._M_finish;
_Alloc_traits::destroy(this->_M_impl, this->_M_impl._M_finish);
_GLIBCXX_ASAN_ANNOTATE_SHRINK(1);
return __position;
}
template<typename _Tp, typename _Alloc>
typename vector<_Tp, _Alloc>::iterator
vector<_Tp, _Alloc>::
_M_erase(iterator __first, iterator __last)
{
if (__first != __last)
{
if (__last != end())
_GLIBCXX_MOVE3(__last, end(), __first);
_M_erase_at_end(__first.base() + (end() - __last));
}
return __first;
}
template<typename _Tp, typename _Alloc>
vector<_Tp, _Alloc>&
vector<_Tp, _Alloc>::
operator=(const vector<_Tp, _Alloc>& __x)
{
if (std::__addressof(__x) != this)
{
_GLIBCXX_ASAN_ANNOTATE_REINIT;
#if __cplusplus >= 201103L
if (_Alloc_traits::_S_propagate_on_copy_assign())
{
if (!_Alloc_traits::_S_always_equal()
&& _M_get_Tp_allocator() != __x._M_get_Tp_allocator())
{
// replacement allocator cannot free existing storage
this->clear();
_M_deallocate(this->_M_impl._M_start,
this->_M_impl._M_end_of_storage
- this->_M_impl._M_start);
this->_M_impl._M_start = nullptr;
this->_M_impl._M_finish = nullptr;
this->_M_impl._M_end_of_storage = nullptr;
}
std::__alloc_on_copy(_M_get_Tp_allocator(),
__x._M_get_Tp_allocator());
}
#endif
const size_type __xlen = __x.size();
if (__xlen > capacity())
{
pointer __tmp = _M_allocate_and_copy(__xlen, __x.begin(),
__x.end());
std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
_M_get_Tp_allocator());
_M_deallocate(this->_M_impl._M_start,
this->_M_impl._M_end_of_storage
- this->_M_impl._M_start);
this->_M_impl._M_start = __tmp;
this->_M_impl._M_end_of_storage = this->_M_impl._M_start + __xlen;
}
else if (size() >= __xlen)
{
std::_Destroy(std::copy(__x.begin(), __x.end(), begin()),
end(), _M_get_Tp_allocator());
}
else
{
std::copy(__x._M_impl._M_start, __x._M_impl._M_start + size(),
this->_M_impl._M_start);
std::__uninitialized_copy_a(__x._M_impl._M_start + size(),
__x._M_impl._M_finish,
this->_M_impl._M_finish,
_M_get_Tp_allocator());
}
this->_M_impl._M_finish = this->_M_impl._M_start + __xlen;
}
return *this;
}
template<typename _Tp, typename _Alloc>
void
vector<_Tp, _Alloc>::
_M_fill_assign(size_t __n, const value_type& __val)
{
if (__n > capacity())
{
vector __tmp(__n, __val, _M_get_Tp_allocator());
__tmp._M_impl._M_swap_data(this->_M_impl);
}
else if (__n > size())
{
std::fill(begin(), end(), __val);
const size_type __add = __n - size();
_GLIBCXX_ASAN_ANNOTATE_GROW(__add);
this->_M_impl._M_finish =
std::__uninitialized_fill_n_a(this->_M_impl._M_finish,
__add, __val, _M_get_Tp_allocator());
_GLIBCXX_ASAN_ANNOTATE_GREW(__add);
}
else
_M_erase_at_end(std::fill_n(this->_M_impl._M_start, __n, __val));
}
template<typename _Tp, typename _Alloc>
template<typename _InputIterator>
void
vector<_Tp, _Alloc>::
_M_assign_aux(_InputIterator __first, _InputIterator __last,
std::input_iterator_tag)
{
pointer __cur(this->_M_impl._M_start);
for (; __first != __last && __cur != this->_M_impl._M_finish;
++__cur, (void)++__first)
*__cur = *__first;
if (__first == __last)
_M_erase_at_end(__cur);
else
_M_range_insert(end(), __first, __last,
std::__iterator_category(__first));
}
template<typename _Tp, typename _Alloc>
template<typename _ForwardIterator>
void
vector<_Tp, _Alloc>::
_M_assign_aux(_ForwardIterator __first, _ForwardIterator __last,
std::forward_iterator_tag)
{
const size_type __len = std::distance(__first, __last);
if (__len > capacity())
{
_S_check_init_len(__len, _M_get_Tp_allocator());
pointer __tmp(_M_allocate_and_copy(__len, __first, __last));
std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
_M_get_Tp_allocator());
_GLIBCXX_ASAN_ANNOTATE_REINIT;
_M_deallocate(this->_M_impl._M_start,
this->_M_impl._M_end_of_storage
- this->_M_impl._M_start);
this->_M_impl._M_start = __tmp;
this->_M_impl._M_finish = this->_M_impl._M_start + __len;
this->_M_impl._M_end_of_storage = this->_M_impl._M_finish;
}
else if (size() >= __len)
_M_erase_at_end(std::copy(__first, __last, this->_M_impl._M_start));
else
{
_ForwardIterator __mid = __first;
std::advance(__mid, size());
std::copy(__first, __mid, this->_M_impl._M_start);
const size_type __attribute__((__unused__)) __n = __len - size();
_GLIBCXX_ASAN_ANNOTATE_GROW(__n);
this->_M_impl._M_finish =
std::__uninitialized_copy_a(__mid, __last,
this->_M_impl._M_finish,
_M_get_Tp_allocator());
_GLIBCXX_ASAN_ANNOTATE_GREW(__n);
}
}
#if __cplusplus >= 201103L
template<typename _Tp, typename _Alloc>
auto
vector<_Tp, _Alloc>::
_M_insert_rval(const_iterator __position, value_type&& __v) -> iterator
{
const auto __n = __position - cbegin();
if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
if (__position == cend())
{
_GLIBCXX_ASAN_ANNOTATE_GROW(1);
_Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
std::move(__v));
++this->_M_impl._M_finish;
_GLIBCXX_ASAN_ANNOTATE_GREW(1);
}
else
_M_insert_aux(begin() + __n, std::move(__v));
else
_M_realloc_insert(begin() + __n, std::move(__v));
return iterator(this->_M_impl._M_start + __n);
}
template<typename _Tp, typename _Alloc>
template<typename... _Args>
auto
vector<_Tp, _Alloc>::
_M_emplace_aux(const_iterator __position, _Args&&... __args)
-> iterator
{
const auto __n = __position - cbegin();
if (this->_M_impl._M_finish != this->_M_impl._M_end_of_storage)
if (__position == cend())
{
_GLIBCXX_ASAN_ANNOTATE_GROW(1);
_Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
std::forward<_Args>(__args)...);
++this->_M_impl._M_finish;
_GLIBCXX_ASAN_ANNOTATE_GREW(1);
}
else
{
// We need to construct a temporary because something in __args...
// could alias one of the elements of the container and so we
// need to use it before _M_insert_aux moves elements around.
_Temporary_value __tmp(this, std::forward<_Args>(__args)...);
_M_insert_aux(begin() + __n, std::move(__tmp._M_val()));
}
else
_M_realloc_insert(begin() + __n, std::forward<_Args>(__args)...);
return iterator(this->_M_impl._M_start + __n);
}
template<typename _Tp, typename _Alloc>
template<typename _Arg>
void
vector<_Tp, _Alloc>::
_M_insert_aux(iterator __position, _Arg&& __arg)
#else
template<typename _Tp, typename _Alloc>
void
vector<_Tp, _Alloc>::
_M_insert_aux(iterator __position, const _Tp& __x)
#endif
{
_GLIBCXX_ASAN_ANNOTATE_GROW(1);
_Alloc_traits::construct(this->_M_impl, this->_M_impl._M_finish,
_GLIBCXX_MOVE(*(this->_M_impl._M_finish - 1)));
++this->_M_impl._M_finish;
_GLIBCXX_ASAN_ANNOTATE_GREW(1);
#if __cplusplus < 201103L
_Tp __x_copy = __x;
#endif
_GLIBCXX_MOVE_BACKWARD3(__position.base(),
this->_M_impl._M_finish - 2,
this->_M_impl._M_finish - 1);
#if __cplusplus < 201103L
*__position = __x_copy;
#else
*__position = std::forward<_Arg>(__arg);
#endif
}
#if __cplusplus >= 201103L
template<typename _Tp, typename _Alloc>
template<typename... _Args>
void
vector<_Tp, _Alloc>::
_M_realloc_insert(iterator __position, _Args&&... __args)
#else
template<typename _Tp, typename _Alloc>
void
vector<_Tp, _Alloc>::
_M_realloc_insert(iterator __position, const _Tp& __x)
#endif
{
const size_type __len =
_M_check_len(size_type(1), "vector::_M_realloc_insert");
pointer __old_start = this->_M_impl._M_start;
pointer __old_finish = this->_M_impl._M_finish;
const size_type __elems_before = __position - begin();
pointer __new_start(this->_M_allocate(__len));
pointer __new_finish(__new_start);
__try
{
// The order of the three operations is dictated by the C++11
// case, where the moves could alter a new element belonging
// to the existing vector. This is an issue only for callers
// taking the element by lvalue ref (see last bullet of C++11
// [res.on.arguments]).
_Alloc_traits::construct(this->_M_impl,
__new_start + __elems_before,
#if __cplusplus >= 201103L
std::forward<_Args>(__args)...);
#else
__x);
#endif
__new_finish = pointer();
#if __cplusplus >= 201103L
if _GLIBCXX17_CONSTEXPR (_S_use_relocate())
{
__new_finish = _S_relocate(__old_start, __position.base(),
__new_start, _M_get_Tp_allocator());
++__new_finish;
__new_finish = _S_relocate(__position.base(), __old_finish,
__new_finish, _M_get_Tp_allocator());
}
else
#endif
{
__new_finish
= std::__uninitialized_move_if_noexcept_a
(__old_start, __position.base(),
__new_start, _M_get_Tp_allocator());
++__new_finish;
__new_finish
= std::__uninitialized_move_if_noexcept_a
(__position.base(), __old_finish,
__new_finish, _M_get_Tp_allocator());
}
}
__catch(...)
{
if (!__new_finish)
_Alloc_traits::destroy(this->_M_impl,
__new_start + __elems_before);
else
std::_Destroy(__new_start, __new_finish, _M_get_Tp_allocator());
_M_deallocate(__new_start, __len);
__throw_exception_again;
}
#if __cplusplus >= 201103L
if _GLIBCXX17_CONSTEXPR (!_S_use_relocate())
#endif
std::_Destroy(__old_start, __old_finish, _M_get_Tp_allocator());
_GLIBCXX_ASAN_ANNOTATE_REINIT;
_M_deallocate(__old_start,
this->_M_impl._M_end_of_storage - __old_start);
this->_M_impl._M_start = __new_start;
this->_M_impl._M_finish = __new_finish;
this->_M_impl._M_end_of_storage = __new_start + __len;
}
template<typename _Tp, typename _Alloc>
void
vector<_Tp, _Alloc>::
_M_fill_insert(iterator __position, size_type __n, const value_type& __x)
{
if (__n != 0)
{
if (size_type(this->_M_impl._M_end_of_storage
- this->_M_impl._M_finish) >= __n)
{
#if __cplusplus < 201103L
value_type __x_copy = __x;
#else
_Temporary_value __tmp(this, __x);
value_type& __x_copy = __tmp._M_val();
#endif
const size_type __elems_after = end() - __position;
pointer __old_finish(this->_M_impl._M_finish);
if (__elems_after > __n)
{
_GLIBCXX_ASAN_ANNOTATE_GROW(__n);
std::__uninitialized_move_a(this->_M_impl._M_finish - __n,
this->_M_impl._M_finish,
this->_M_impl._M_finish,
_M_get_Tp_allocator());
this->_M_impl._M_finish += __n;
_GLIBCXX_ASAN_ANNOTATE_GREW(__n);
_GLIBCXX_MOVE_BACKWARD3(__position.base(),
__old_finish - __n, __old_finish);
std::fill(__position.base(), __position.base() + __n,
__x_copy);
}
else
{
_GLIBCXX_ASAN_ANNOTATE_GROW(__n);
this->_M_impl._M_finish =
std::__uninitialized_fill_n_a(this->_M_impl._M_finish,
__n - __elems_after,
__x_copy,
_M_get_Tp_allocator());
_GLIBCXX_ASAN_ANNOTATE_GREW(__n - __elems_after);
std::__uninitialized_move_a(__position.base(), __old_finish,
this->_M_impl._M_finish,
_M_get_Tp_allocator());
this->_M_impl._M_finish += __elems_after;
_GLIBCXX_ASAN_ANNOTATE_GREW(__elems_after);
std::fill(__position.base(), __old_finish, __x_copy);
}
}
else
{
const size_type __len =
_M_check_len(__n, "vector::_M_fill_insert");
const size_type __elems_before = __position - begin();
pointer __new_start(this->_M_allocate(__len));
pointer __new_finish(__new_start);
__try
{
// See _M_realloc_insert above.
std::__uninitialized_fill_n_a(__new_start + __elems_before,
__n, __x,
_M_get_Tp_allocator());
__new_finish = pointer();
__new_finish
= std::__uninitialized_move_if_noexcept_a
(this->_M_impl._M_start, __position.base(),
__new_start, _M_get_Tp_allocator());
__new_finish += __n;
__new_finish
= std::__uninitialized_move_if_noexcept_a
(__position.base(), this->_M_impl._M_finish,
__new_finish, _M_get_Tp_allocator());
}
__catch(...)
{
if (!__new_finish)
std::_Destroy(__new_start + __elems_before,
__new_start + __elems_before + __n,
_M_get_Tp_allocator());
else
std::_Destroy(__new_start, __new_finish,
_M_get_Tp_allocator());
_M_deallocate(__new_start, __len);
__throw_exception_again;
}
std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
_M_get_Tp_allocator());
_GLIBCXX_ASAN_ANNOTATE_REINIT;
_M_deallocate(this->_M_impl._M_start,
this->_M_impl._M_end_of_storage
- this->_M_impl._M_start);
this->_M_impl._M_start = __new_start;
this->_M_impl._M_finish = __new_finish;
this->_M_impl._M_end_of_storage = __new_start + __len;
}
}
}
#if __cplusplus >= 201103L
template<typename _Tp, typename _Alloc>
void
vector<_Tp, _Alloc>::
_M_default_append(size_type __n)
{
if (__n != 0)
{
const size_type __size = size();
size_type __navail = size_type(this->_M_impl._M_end_of_storage
- this->_M_impl._M_finish);
if (__size > max_size() || __navail > max_size() - __size)
__builtin_unreachable();
if (__navail >= __n)
{
_GLIBCXX_ASAN_ANNOTATE_GROW(__n);
this->_M_impl._M_finish =
std::__uninitialized_default_n_a(this->_M_impl._M_finish,
__n, _M_get_Tp_allocator());
_GLIBCXX_ASAN_ANNOTATE_GREW(__n);
}
else
{
const size_type __len =
_M_check_len(__n, "vector::_M_default_append");
pointer __new_start(this->_M_allocate(__len));
if _GLIBCXX17_CONSTEXPR (_S_use_relocate())
{
__try
{
std::__uninitialized_default_n_a(__new_start + __size,
__n, _M_get_Tp_allocator());
}
__catch(...)
{
_M_deallocate(__new_start, __len);
__throw_exception_again;
}
_S_relocate(this->_M_impl._M_start, this->_M_impl._M_finish,
__new_start, _M_get_Tp_allocator());
}
else
{
pointer __destroy_from = pointer();
__try
{
std::__uninitialized_default_n_a(__new_start + __size,
__n, _M_get_Tp_allocator());
__destroy_from = __new_start + __size;
std::__uninitialized_move_if_noexcept_a(
this->_M_impl._M_start, this->_M_impl._M_finish,
__new_start, _M_get_Tp_allocator());
}
__catch(...)
{
if (__destroy_from)
std::_Destroy(__destroy_from, __destroy_from + __n,
_M_get_Tp_allocator());
_M_deallocate(__new_start, __len);
__throw_exception_again;
}
std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
_M_get_Tp_allocator());
}
_GLIBCXX_ASAN_ANNOTATE_REINIT;
_M_deallocate(this->_M_impl._M_start,
this->_M_impl._M_end_of_storage
- this->_M_impl._M_start);
this->_M_impl._M_start = __new_start;
this->_M_impl._M_finish = __new_start + __size + __n;
this->_M_impl._M_end_of_storage = __new_start + __len;
}
}
}
template<typename _Tp, typename _Alloc>
bool
vector<_Tp, _Alloc>::
_M_shrink_to_fit()
{
if (capacity() == size())
return false;
_GLIBCXX_ASAN_ANNOTATE_REINIT;
return std::__shrink_to_fit_aux<vector>::_S_do_it(*this);
}
#endif
template<typename _Tp, typename _Alloc>
template<typename _InputIterator>
void
vector<_Tp, _Alloc>::
_M_range_insert(iterator __pos, _InputIterator __first,
_InputIterator __last, std::input_iterator_tag)
{
if (__pos == end())
{
for (; __first != __last; ++__first)
insert(end(), *__first);
}
else if (__first != __last)
{
vector __tmp(__first, __last, _M_get_Tp_allocator());
insert(__pos,
_GLIBCXX_MAKE_MOVE_ITERATOR(__tmp.begin()),
_GLIBCXX_MAKE_MOVE_ITERATOR(__tmp.end()));
}
}
template<typename _Tp, typename _Alloc>
template<typename _ForwardIterator>
void
vector<_Tp, _Alloc>::
_M_range_insert(iterator __position, _ForwardIterator __first,
_ForwardIterator __last, std::forward_iterator_tag)
{
if (__first != __last)
{
const size_type __n = std::distance(__first, __last);
if (size_type(this->_M_impl._M_end_of_storage
- this->_M_impl._M_finish) >= __n)
{
const size_type __elems_after = end() - __position;
pointer __old_finish(this->_M_impl._M_finish);
if (__elems_after > __n)
{
_GLIBCXX_ASAN_ANNOTATE_GROW(__n);
std::__uninitialized_move_a(this->_M_impl._M_finish - __n,
this->_M_impl._M_finish,
this->_M_impl._M_finish,
_M_get_Tp_allocator());
this->_M_impl._M_finish += __n;
_GLIBCXX_ASAN_ANNOTATE_GREW(__n);
_GLIBCXX_MOVE_BACKWARD3(__position.base(),
__old_finish - __n, __old_finish);
std::copy(__first, __last, __position);
}
else
{
_ForwardIterator __mid = __first;
std::advance(__mid, __elems_after);
_GLIBCXX_ASAN_ANNOTATE_GROW(__n);
std::__uninitialized_copy_a(__mid, __last,
this->_M_impl._M_finish,
_M_get_Tp_allocator());
this->_M_impl._M_finish += __n - __elems_after;
_GLIBCXX_ASAN_ANNOTATE_GREW(__n - __elems_after);
std::__uninitialized_move_a(__position.base(),
__old_finish,
this->_M_impl._M_finish,
_M_get_Tp_allocator());
this->_M_impl._M_finish += __elems_after;
_GLIBCXX_ASAN_ANNOTATE_GREW(__elems_after);
std::copy(__first, __mid, __position);
}
}
else
{
const size_type __len =
_M_check_len(__n, "vector::_M_range_insert");
pointer __new_start(this->_M_allocate(__len));
pointer __new_finish(__new_start);
__try
{
__new_finish
= std::__uninitialized_move_if_noexcept_a
(this->_M_impl._M_start, __position.base(),
__new_start, _M_get_Tp_allocator());
__new_finish
= std::__uninitialized_copy_a(__first, __last,
__new_finish,
_M_get_Tp_allocator());
__new_finish
= std::__uninitialized_move_if_noexcept_a
(__position.base(), this->_M_impl._M_finish,
__new_finish, _M_get_Tp_allocator());
}
__catch(...)
{
std::_Destroy(__new_start, __new_finish,
_M_get_Tp_allocator());
_M_deallocate(__new_start, __len);
__throw_exception_again;
}
std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
_M_get_Tp_allocator());
_GLIBCXX_ASAN_ANNOTATE_REINIT;
_M_deallocate(this->_M_impl._M_start,
this->_M_impl._M_end_of_storage
- this->_M_impl._M_start);
this->_M_impl._M_start = __new_start;
this->_M_impl._M_finish = __new_finish;
this->_M_impl._M_end_of_storage = __new_start + __len;
}
}
}
// vector<bool>
template<typename _Alloc>
void
vector<bool, _Alloc>::
_M_reallocate(size_type __n)
{
_Bit_pointer __q = this->_M_allocate(__n);
iterator __start(std::__addressof(*__q), 0);
iterator __finish(_M_copy_aligned(begin(), end(), __start));
this->_M_deallocate();
this->_M_impl._M_start = __start;
this->_M_impl._M_finish = __finish;
this->_M_impl._M_end_of_storage = __q + _S_nword(__n);
}
template<typename _Alloc>
void
vector<bool, _Alloc>::
_M_fill_insert(iterator __position, size_type __n, bool __x)
{
if (__n == 0)
return;
if (capacity() - size() >= __n)
{
std::copy_backward(__position, end(),
this->_M_impl._M_finish + difference_type(__n));
std::fill(__position, __position + difference_type(__n), __x);
this->_M_impl._M_finish += difference_type(__n);
}
else
{
const size_type __len =
_M_check_len(__n, "vector<bool>::_M_fill_insert");
_Bit_pointer __q = this->_M_allocate(__len);
iterator __start(std::__addressof(*__q), 0);
iterator __i = _M_copy_aligned(begin(), __position, __start);
std::fill(__i, __i + difference_type(__n), __x);
iterator __finish = std::copy(__position, end(),
__i + difference_type(__n));
this->_M_deallocate();
this->_M_impl._M_end_of_storage = __q + _S_nword(__len);
this->_M_impl._M_start = __start;
this->_M_impl._M_finish = __finish;
}
}
template<typename _Alloc>
template<typename _ForwardIterator>
void
vector<bool, _Alloc>::
_M_insert_range(iterator __position, _ForwardIterator __first,
_ForwardIterator __last, std::forward_iterator_tag)
{
if (__first != __last)
{
size_type __n = std::distance(__first, __last);
if (capacity() - size() >= __n)
{
std::copy_backward(__position, end(),
this->_M_impl._M_finish
+ difference_type(__n));
std::copy(__first, __last, __position);
this->_M_impl._M_finish += difference_type(__n);
}
else
{
const size_type __len =
_M_check_len(__n, "vector<bool>::_M_insert_range");
_Bit_pointer __q = this->_M_allocate(__len);
iterator __start(std::__addressof(*__q), 0);
iterator __i = _M_copy_aligned(begin(), __position, __start);
__i = std::copy(__first, __last, __i);
iterator __finish = std::copy(__position, end(), __i);
this->_M_deallocate();
this->_M_impl._M_end_of_storage = __q + _S_nword(__len);
this->_M_impl._M_start = __start;
this->_M_impl._M_finish = __finish;
}
}
}
template<typename _Alloc>
void
vector<bool, _Alloc>::
_M_insert_aux(iterator __position, bool __x)
{
if (this->_M_impl._M_finish._M_p != this->_M_impl._M_end_addr())
{
std::copy_backward(__position, this->_M_impl._M_finish,
this->_M_impl._M_finish + 1);
*__position = __x;
++this->_M_impl._M_finish;
}
else
{
const size_type __len =
_M_check_len(size_type(1), "vector<bool>::_M_insert_aux");
_Bit_pointer __q = this->_M_allocate(__len);
iterator __start(std::__addressof(*__q), 0);
iterator __i = _M_copy_aligned(begin(), __position, __start);
*__i++ = __x;
iterator __finish = std::copy(__position, end(), __i);
this->_M_deallocate();
this->_M_impl._M_end_of_storage = __q + _S_nword(__len);
this->_M_impl._M_start = __start;
this->_M_impl._M_finish = __finish;
}
}
template<typename _Alloc>
typename vector<bool, _Alloc>::iterator
vector<bool, _Alloc>::
_M_erase(iterator __position)
{
if (__position + 1 != end())
std::copy(__position + 1, end(), __position);
--this->_M_impl._M_finish;
return __position;
}
template<typename _Alloc>
typename vector<bool, _Alloc>::iterator
vector<bool, _Alloc>::
_M_erase(iterator __first, iterator __last)
{
if (__first != __last)
_M_erase_at_end(std::copy(__last, end(), __first));
return __first;
}
#if __cplusplus >= 201103L
template<typename _Alloc>
bool
vector<bool, _Alloc>::
_M_shrink_to_fit()
{
if (capacity() - size() < int(_S_word_bit))
return false;
__try
{
if (size_type __n = size())
_M_reallocate(__n);
else
{
this->_M_deallocate();
this->_M_impl._M_reset();
}
return true;
}
__catch(...)
{ return false; }
}
#endif
_GLIBCXX_END_NAMESPACE_CONTAINER
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#if __cplusplus >= 201103L
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Alloc>
size_t
hash<_GLIBCXX_STD_C::vector<bool, _Alloc>>::
operator()(const _GLIBCXX_STD_C::vector<bool, _Alloc>& __b) const noexcept
{
size_t __hash = 0;
using _GLIBCXX_STD_C::_S_word_bit;
using _GLIBCXX_STD_C::_Bit_type;
const size_t __words = __b.size() / _S_word_bit;
if (__words)
{
const size_t __clength = __words * sizeof(_Bit_type);
__hash = std::_Hash_impl::hash(__b._M_impl._M_start._M_p, __clength);
}
const size_t __extrabits = __b.size() % _S_word_bit;
if (__extrabits)
{
_Bit_type __hiword = *__b._M_impl._M_finish._M_p;
__hiword &= ~((~static_cast<_Bit_type>(0)) << __extrabits);
const size_t __clength
= (__extrabits + __CHAR_BIT__ - 1) / __CHAR_BIT__;
if (__words)
__hash = std::_Hash_impl::hash(&__hiword, __clength, __hash);
else
__hash = std::_Hash_impl::hash(&__hiword, __clength);
}
return __hash;
}
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // C++11
#undef _GLIBCXX_ASAN_ANNOTATE_REINIT
#undef _GLIBCXX_ASAN_ANNOTATE_GROW
#undef _GLIBCXX_ASAN_ANNOTATE_GREW
#undef _GLIBCXX_ASAN_ANNOTATE_SHRINK
#endif /* _VECTOR_TCC */
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