Magic-Mirror/llvm-capstone
1
0
Fork 0
mirror of https://github.com/capstone-engine/llvm-capstone.git synced 2024-11-23 13:50:11 +00:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity
12563ea640
llvm-capstone/libcxx/include/__split_buffer
Nikolas Klauser 9f3e3efd98 [libc++][NFC] Refactor __enable_if return types to defaulted template parameters 
This brings most of the enable_ifs in libc++ to the same style. It also has the nice side-effect of reducing the size of names of these symbols, since the depedent return type is shorter.

Reviewed By: #libc, ldionne

Spies: ldionne, libcxx-commits

Differential Revision: https://reviews.llvm.org/D157787
2023-09-01 17:52:31 -07:00

686 lines
25 KiB
C++
Raw Blame History

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___SPLIT_BUFFER
#define _LIBCPP___SPLIT_BUFFER
#include <__algorithm/max.h>
#include <__algorithm/move.h>
#include <__algorithm/move_backward.h>
#include <__config>
#include <__iterator/distance.h>
#include <__iterator/iterator_traits.h>
#include <__iterator/move_iterator.h>
#include <__memory/allocate_at_least.h>
#include <__memory/allocator.h>
#include <__memory/allocator_traits.h>
#include <__memory/compressed_pair.h>
#include <__memory/pointer_traits.h>
#include <__memory/swap_allocator.h>
#include <__type_traits/add_lvalue_reference.h>
#include <__type_traits/enable_if.h>
#include <__type_traits/integral_constant.h>
#include <__type_traits/is_nothrow_default_constructible.h>
#include <__type_traits/is_nothrow_move_assignable.h>
#include <__type_traits/is_nothrow_move_constructible.h>
#include <__type_traits/is_swappable.h>
#include <__type_traits/is_trivially_destructible.h>
#include <__type_traits/remove_reference.h>
#include <__utility/forward.h>
#include <__utility/move.h>
#include <cstddef>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_PUSH_MACROS
#include <__undef_macros>
_LIBCPP_BEGIN_NAMESPACE_STD
// __split_buffer allocates a contiguous chunk of memory and stores objects in the range [__begin_, __end_).
// It has uninitialized memory in the ranges [__first_, __begin_) and [__end_, __end_cap_.first()). That allows
// it to grow both in the front and back without having to move the data.
template <class _Tp, class _Allocator = allocator<_Tp> >
struct __split_buffer
{
public:
using value_type = _Tp;
using allocator_type = _Allocator;
using __alloc_rr = __libcpp_remove_reference_t<allocator_type>;
using __alloc_traits = allocator_traits<__alloc_rr>;
using reference = value_type&;
using const_reference = const value_type&;
using size_type = typename __alloc_traits::size_type;
using difference_type = typename __alloc_traits::difference_type;
using pointer = typename __alloc_traits::pointer;
using const_pointer = typename __alloc_traits::const_pointer;
using iterator = pointer;
using const_iterator = const_pointer;
pointer __first_;
pointer __begin_;
pointer __end_;
__compressed_pair<pointer, allocator_type> __end_cap_;
using __alloc_ref = __add_lvalue_reference_t<allocator_type>;
using __alloc_const_ref = __add_lvalue_reference_t<allocator_type>;
__split_buffer(const __split_buffer&) = delete;
__split_buffer& operator=(const __split_buffer&) = delete;
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __split_buffer()
_NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value)
: __first_(nullptr), __begin_(nullptr), __end_(nullptr), __end_cap_(nullptr, __default_init_tag()) {}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI explicit __split_buffer(__alloc_rr& __a)
: __first_(nullptr), __begin_(nullptr), __end_(nullptr), __end_cap_(nullptr, __a) {}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI explicit __split_buffer(const __alloc_rr& __a)
: __first_(nullptr), __begin_(nullptr), __end_(nullptr), __end_cap_(nullptr, __a) {}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI
__split_buffer(size_type __cap, size_type __start, __alloc_rr& __a);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __split_buffer(__split_buffer&& __c)
_NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __split_buffer(__split_buffer&& __c, const __alloc_rr& __a);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __split_buffer& operator=(__split_buffer&& __c)
_NOEXCEPT_((__alloc_traits::propagate_on_container_move_assignment::value &&
is_nothrow_move_assignable<allocator_type>::value) ||
!__alloc_traits::propagate_on_container_move_assignment::value);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI ~__split_buffer();
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __alloc_rr& __alloc() _NOEXCEPT { return __end_cap_.second(); }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI const __alloc_rr& __alloc() const _NOEXCEPT {
return __end_cap_.second();
}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pointer& __end_cap() _NOEXCEPT { return __end_cap_.first(); }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI const pointer& __end_cap() const _NOEXCEPT {
return __end_cap_.first();
}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI iterator begin() _NOEXCEPT { return __begin_; }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI const_iterator begin() const _NOEXCEPT { return __begin_; }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI iterator end() _NOEXCEPT { return __end_; }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI const_iterator end() const _NOEXCEPT { return __end_; }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void clear() _NOEXCEPT { __destruct_at_end(__begin_); }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI size_type size() const {
return static_cast<size_type>(__end_ - __begin_);
}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool empty() const { return __end_ == __begin_; }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI size_type capacity() const {
return static_cast<size_type>(__end_cap() - __first_);
}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI size_type __front_spare() const {
return static_cast<size_type>(__begin_ - __first_);
}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI size_type __back_spare() const {
return static_cast<size_type>(__end_cap() - __end_);
}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI reference front() { return *__begin_; }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI const_reference front() const { return *__begin_; }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI reference back() { return *(__end_ - 1); }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI const_reference back() const { return *(__end_ - 1); }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void reserve(size_type __n);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void shrink_to_fit() _NOEXCEPT;
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void push_front(const_reference __x);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void push_back(const_reference __x);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void push_front(value_type&& __x);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void push_back(value_type&& __x);
template <class... _Args>
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void emplace_back(_Args&&... __args);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void pop_front() { __destruct_at_begin(__begin_ + 1); }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void pop_back() { __destruct_at_end(__end_ - 1); }
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __construct_at_end(size_type __n);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __construct_at_end(size_type __n, const_reference __x);
template <class _InputIter, __enable_if_t<__has_exactly_input_iterator_category<_InputIter>::value, int> = 0>
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI
void __construct_at_end(_InputIter __first, _InputIter __last);
template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0>
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI
void __construct_at_end(_ForwardIterator __first, _ForwardIterator __last);
template <class _Iterator, class _Sentinel>
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI
void __construct_at_end_with_sentinel(_Iterator __first, _Sentinel __last);
template <class _Iterator>
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI
void __construct_at_end_with_size(_Iterator __first, size_type __n);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __destruct_at_begin(pointer __new_begin) {
__destruct_at_begin(__new_begin, is_trivially_destructible<value_type>());
}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __destruct_at_begin(pointer __new_begin, false_type);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __destruct_at_begin(pointer __new_begin, true_type);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __destruct_at_end(pointer __new_last) _NOEXCEPT {
__destruct_at_end(__new_last, false_type());
}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __destruct_at_end(pointer __new_last, false_type) _NOEXCEPT;
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __destruct_at_end(pointer __new_last, true_type) _NOEXCEPT;
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void swap(__split_buffer& __x)
_NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || __is_nothrow_swappable<__alloc_rr>::value);
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool __invariants() const;
private:
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __move_assign_alloc(__split_buffer& __c, true_type)
_NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) {
__alloc() = _VSTD::move(__c.__alloc());
}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __move_assign_alloc(__split_buffer&, false_type) _NOEXCEPT {}
struct _ConstructTransaction {
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI explicit _ConstructTransaction(
pointer* __p, size_type __n) _NOEXCEPT
: __pos_(*__p),
__end_(*__p + __n),
__dest_(__p) {}
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI ~_ConstructTransaction() { *__dest_ = __pos_; }
pointer __pos_;
const pointer __end_;
private:
pointer* __dest_;
};
};
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
bool
__split_buffer<_Tp, _Allocator>::__invariants() const
{
if (__first_ == nullptr)
{
if (__begin_ != nullptr)
return false;
if (__end_ != nullptr)
return false;
if (__end_cap() != nullptr)
return false;
}
else
{
if (__begin_ < __first_)
return false;
if (__end_ < __begin_)
return false;
if (__end_cap() < __end_)
return false;
}
return true;
}
// Default constructs __n objects starting at __end_
// throws if construction throws
// Precondition: __n > 0
// Precondition: size() + __n <= capacity()
// Postcondition: size() == size() + __n
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
void
__split_buffer<_Tp, _Allocator>::__construct_at_end(size_type __n)
{
_ConstructTransaction __tx(&this->__end_, __n);
for (; __tx.__pos_ != __tx.__end_; ++__tx.__pos_) {
__alloc_traits::construct(this->__alloc(), _VSTD::__to_address(__tx.__pos_));
}
}
// Copy constructs __n objects starting at __end_ from __x
// throws if construction throws
// Precondition: __n > 0
// Precondition: size() + __n <= capacity()
// Postcondition: size() == old size() + __n
// Postcondition: [i] == __x for all i in [size() - __n, __n)
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
void
__split_buffer<_Tp, _Allocator>::__construct_at_end(size_type __n, const_reference __x)
{
_ConstructTransaction __tx(&this->__end_, __n);
for (; __tx.__pos_ != __tx.__end_; ++__tx.__pos_) {
__alloc_traits::construct(this->__alloc(),
_VSTD::__to_address(__tx.__pos_), __x);
}
}
template <class _Tp, class _Allocator>
template <class _InputIter, __enable_if_t<__has_exactly_input_iterator_category<_InputIter>::value, int> >
_LIBCPP_CONSTEXPR_SINCE_CXX20
void __split_buffer<_Tp, _Allocator>::__construct_at_end(_InputIter __first, _InputIter __last)
{
__construct_at_end_with_sentinel(__first, __last);
}
template <class _Tp, class _Allocator>
template <class _Iterator, class _Sentinel>
_LIBCPP_CONSTEXPR_SINCE_CXX20
void __split_buffer<_Tp, _Allocator>::__construct_at_end_with_sentinel(_Iterator __first, _Sentinel __last) {
__alloc_rr& __a = this->__alloc();
for (; __first != __last; ++__first)
{
if (__end_ == __end_cap())
{
size_type __old_cap = __end_cap() - __first_;
size_type __new_cap = _VSTD::max<size_type>(2 * __old_cap, 8);
__split_buffer __buf(__new_cap, 0, __a);
for (pointer __p = __begin_; __p != __end_; ++__p, (void) ++__buf.__end_)
__alloc_traits::construct(__buf.__alloc(),
_VSTD::__to_address(__buf.__end_), _VSTD::move(*__p));
swap(__buf);
}
__alloc_traits::construct(__a, _VSTD::__to_address(this->__end_), *__first);
++this->__end_;
}
}
template <class _Tp, class _Allocator>
template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> >
_LIBCPP_CONSTEXPR_SINCE_CXX20
void __split_buffer<_Tp, _Allocator>::__construct_at_end(_ForwardIterator __first, _ForwardIterator __last)
{
__construct_at_end_with_size(__first, std::distance(__first, __last));
}
template <class _Tp, class _Allocator>
template <class _ForwardIterator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
void __split_buffer<_Tp, _Allocator>::__construct_at_end_with_size(_ForwardIterator __first, size_type __n) {
_ConstructTransaction __tx(&this->__end_, __n);
for (; __tx.__pos_ != __tx.__end_; ++__tx.__pos_, (void) ++__first) {
__alloc_traits::construct(this->__alloc(),
_VSTD::__to_address(__tx.__pos_), *__first);
}
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
inline
void
__split_buffer<_Tp, _Allocator>::__destruct_at_begin(pointer __new_begin, false_type)
{
while (__begin_ != __new_begin)
__alloc_traits::destroy(__alloc(), _VSTD::__to_address(__begin_++));
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
inline
void
__split_buffer<_Tp, _Allocator>::__destruct_at_begin(pointer __new_begin, true_type)
{
__begin_ = __new_begin;
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
inline _LIBCPP_HIDE_FROM_ABI
void
__split_buffer<_Tp, _Allocator>::__destruct_at_end(pointer __new_last, false_type) _NOEXCEPT
{
while (__new_last != __end_)
__alloc_traits::destroy(__alloc(), _VSTD::__to_address(--__end_));
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
inline _LIBCPP_HIDE_FROM_ABI
void
__split_buffer<_Tp, _Allocator>::__destruct_at_end(pointer __new_last, true_type) _NOEXCEPT
{
__end_ = __new_last;
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
__split_buffer<_Tp, _Allocator>::__split_buffer(size_type __cap, size_type __start, __alloc_rr& __a)
: __end_cap_(nullptr, __a)
{
if (__cap == 0) {
__first_ = nullptr;
} else {
auto __allocation = std::__allocate_at_least(__alloc(), __cap);
__first_ = __allocation.ptr;
__cap = __allocation.count;
}
__begin_ = __end_ = __first_ + __start;
__end_cap() = __first_ + __cap;
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
__split_buffer<_Tp, _Allocator>::~__split_buffer()
{
clear();
if (__first_)
__alloc_traits::deallocate(__alloc(), __first_, capacity());
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
__split_buffer<_Tp, _Allocator>::__split_buffer(__split_buffer&& __c)
_NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value)
: __first_(_VSTD::move(__c.__first_)),
__begin_(_VSTD::move(__c.__begin_)),
__end_(_VSTD::move(__c.__end_)),
__end_cap_(_VSTD::move(__c.__end_cap_))
{
__c.__first_ = nullptr;
__c.__begin_ = nullptr;
__c.__end_ = nullptr;
__c.__end_cap() = nullptr;
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
__split_buffer<_Tp, _Allocator>::__split_buffer(__split_buffer&& __c, const __alloc_rr& __a)
: __end_cap_(nullptr, __a)
{
if (__a == __c.__alloc())
{
__first_ = __c.__first_;
__begin_ = __c.__begin_;
__end_ = __c.__end_;
__end_cap() = __c.__end_cap();
__c.__first_ = nullptr;
__c.__begin_ = nullptr;
__c.__end_ = nullptr;
__c.__end_cap() = nullptr;
}
else
{
auto __allocation = std::__allocate_at_least(__alloc(), __c.size());
__first_ = __allocation.ptr;
__begin_ = __end_ = __first_;
__end_cap() = __first_ + __allocation.count;
typedef move_iterator<iterator> _Ip;
__construct_at_end(_Ip(__c.begin()), _Ip(__c.end()));
}
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
__split_buffer<_Tp, _Allocator>&
__split_buffer<_Tp, _Allocator>::operator=(__split_buffer&& __c)
_NOEXCEPT_((__alloc_traits::propagate_on_container_move_assignment::value &&
is_nothrow_move_assignable<allocator_type>::value) ||
!__alloc_traits::propagate_on_container_move_assignment::value)
{
clear();
shrink_to_fit();
__first_ = __c.__first_;
__begin_ = __c.__begin_;
__end_ = __c.__end_;
__end_cap() = __c.__end_cap();
__move_assign_alloc(__c,
integral_constant<bool,
__alloc_traits::propagate_on_container_move_assignment::value>());
__c.__first_ = __c.__begin_ = __c.__end_ = __c.__end_cap() = nullptr;
return *this;
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
void
__split_buffer<_Tp, _Allocator>::swap(__split_buffer& __x)
_NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value||
__is_nothrow_swappable<__alloc_rr>::value)
{
_VSTD::swap(__first_, __x.__first_);
_VSTD::swap(__begin_, __x.__begin_);
_VSTD::swap(__end_, __x.__end_);
_VSTD::swap(__end_cap(), __x.__end_cap());
_VSTD::__swap_allocator(__alloc(), __x.__alloc());
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
void
__split_buffer<_Tp, _Allocator>::reserve(size_type __n)
{
if (__n < capacity())
{
__split_buffer<value_type, __alloc_rr&> __t(__n, 0, __alloc());
__t.__construct_at_end(move_iterator<pointer>(__begin_),
move_iterator<pointer>(__end_));
_VSTD::swap(__first_, __t.__first_);
_VSTD::swap(__begin_, __t.__begin_);
_VSTD::swap(__end_, __t.__end_);
_VSTD::swap(__end_cap(), __t.__end_cap());
}
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
void
__split_buffer<_Tp, _Allocator>::shrink_to_fit() _NOEXCEPT
{
if (capacity() > size())
{
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
__split_buffer<value_type, __alloc_rr&> __t(size(), 0, __alloc());
__t.__construct_at_end(move_iterator<pointer>(__begin_),
move_iterator<pointer>(__end_));
__t.__end_ = __t.__begin_ + (__end_ - __begin_);
_VSTD::swap(__first_, __t.__first_);
_VSTD::swap(__begin_, __t.__begin_);
_VSTD::swap(__end_, __t.__end_);
_VSTD::swap(__end_cap(), __t.__end_cap());
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
}
catch (...)
{
}
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
}
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
void
__split_buffer<_Tp, _Allocator>::push_front(const_reference __x)
{
if (__begin_ == __first_)
{
if (__end_ < __end_cap())
{
difference_type __d = __end_cap() - __end_;
__d = (__d + 1) / 2;
__begin_ = _VSTD::move_backward(__begin_, __end_, __end_ + __d);
__end_ += __d;
}
else
{
size_type __c = std::max<size_type>(2 * static_cast<size_t>(__end_cap() - __first_), 1);
__split_buffer<value_type, __alloc_rr&> __t(__c, (__c + 3) / 4, __alloc());
__t.__construct_at_end(move_iterator<pointer>(__begin_),
move_iterator<pointer>(__end_));
_VSTD::swap(__first_, __t.__first_);
_VSTD::swap(__begin_, __t.__begin_);
_VSTD::swap(__end_, __t.__end_);
_VSTD::swap(__end_cap(), __t.__end_cap());
}
}
__alloc_traits::construct(__alloc(), _VSTD::__to_address(__begin_-1), __x);
--__begin_;
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
void
__split_buffer<_Tp, _Allocator>::push_front(value_type&& __x)
{
if (__begin_ == __first_)
{
if (__end_ < __end_cap())
{
difference_type __d = __end_cap() - __end_;
__d = (__d + 1) / 2;
__begin_ = _VSTD::move_backward(__begin_, __end_, __end_ + __d);
__end_ += __d;
}
else
{
size_type __c = std::max<size_type>(2 * static_cast<size_t>(__end_cap() - __first_), 1);
__split_buffer<value_type, __alloc_rr&> __t(__c, (__c + 3) / 4, __alloc());
__t.__construct_at_end(move_iterator<pointer>(__begin_),
move_iterator<pointer>(__end_));
_VSTD::swap(__first_, __t.__first_);
_VSTD::swap(__begin_, __t.__begin_);
_VSTD::swap(__end_, __t.__end_);
_VSTD::swap(__end_cap(), __t.__end_cap());
}
}
__alloc_traits::construct(__alloc(), _VSTD::__to_address(__begin_-1),
_VSTD::move(__x));
--__begin_;
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
inline _LIBCPP_HIDE_FROM_ABI
void
__split_buffer<_Tp, _Allocator>::push_back(const_reference __x)
{
if (__end_ == __end_cap())
{
if (__begin_ > __first_)
{
difference_type __d = __begin_ - __first_;
__d = (__d + 1) / 2;
__end_ = _VSTD::move(__begin_, __end_, __begin_ - __d);
__begin_ -= __d;
}
else
{
size_type __c = std::max<size_type>(2 * static_cast<size_t>(__end_cap() - __first_), 1);
__split_buffer<value_type, __alloc_rr&> __t(__c, __c / 4, __alloc());
__t.__construct_at_end(move_iterator<pointer>(__begin_),
move_iterator<pointer>(__end_));
_VSTD::swap(__first_, __t.__first_);
_VSTD::swap(__begin_, __t.__begin_);
_VSTD::swap(__end_, __t.__end_);
_VSTD::swap(__end_cap(), __t.__end_cap());
}
}
__alloc_traits::construct(__alloc(), _VSTD::__to_address(__end_), __x);
++__end_;
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
void
__split_buffer<_Tp, _Allocator>::push_back(value_type&& __x)
{
if (__end_ == __end_cap())
{
if (__begin_ > __first_)
{
difference_type __d = __begin_ - __first_;
__d = (__d + 1) / 2;
__end_ = _VSTD::move(__begin_, __end_, __begin_ - __d);
__begin_ -= __d;
}
else
{
size_type __c = std::max<size_type>(2 * static_cast<size_t>(__end_cap() - __first_), 1);
__split_buffer<value_type, __alloc_rr&> __t(__c, __c / 4, __alloc());
__t.__construct_at_end(move_iterator<pointer>(__begin_),
move_iterator<pointer>(__end_));
_VSTD::swap(__first_, __t.__first_);
_VSTD::swap(__begin_, __t.__begin_);
_VSTD::swap(__end_, __t.__end_);
_VSTD::swap(__end_cap(), __t.__end_cap());
}
}
__alloc_traits::construct(__alloc(), _VSTD::__to_address(__end_),
_VSTD::move(__x));
++__end_;
}
template <class _Tp, class _Allocator>
template <class... _Args>
_LIBCPP_CONSTEXPR_SINCE_CXX20
void
__split_buffer<_Tp, _Allocator>::emplace_back(_Args&&... __args)
{
if (__end_ == __end_cap())
{
if (__begin_ > __first_)
{
difference_type __d = __begin_ - __first_;
__d = (__d + 1) / 2;
__end_ = _VSTD::move(__begin_, __end_, __begin_ - __d);
__begin_ -= __d;
}
else
{
size_type __c = std::max<size_type>(2 * static_cast<size_t>(__end_cap() - __first_), 1);
__split_buffer<value_type, __alloc_rr&> __t(__c, __c / 4, __alloc());
__t.__construct_at_end(move_iterator<pointer>(__begin_),
move_iterator<pointer>(__end_));
_VSTD::swap(__first_, __t.__first_);
_VSTD::swap(__begin_, __t.__begin_);
_VSTD::swap(__end_, __t.__end_);
_VSTD::swap(__end_cap(), __t.__end_cap());
}
}
__alloc_traits::construct(__alloc(), _VSTD::__to_address(__end_),
_VSTD::forward<_Args>(__args)...);
++__end_;
}
template <class _Tp, class _Allocator>
_LIBCPP_CONSTEXPR_SINCE_CXX20
inline _LIBCPP_HIDE_FROM_ABI
void
swap(__split_buffer<_Tp, _Allocator>& __x, __split_buffer<_Tp, _Allocator>& __y)
_NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
{
__x.swap(__y);
}
_LIBCPP_END_NAMESPACE_STD
_LIBCPP_POP_MACROS
#endif // _LIBCPP___SPLIT_BUFFER
Reference in New Issue View Git Blame Copy Permalink