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1 // -*- C++ -*-
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2 #ifndef _LIBCPP_SPLIT_BUFFER
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3 #define _LIBCPP_SPLIT_BUFFER
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4
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5 #include <__config>
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6 #include <type_traits>
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7 #include <algorithm>
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8
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9 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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10 #pragma GCC system_header
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11 #endif
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12
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13 _LIBCPP_PUSH_MACROS
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14 #include <__undef_macros>
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15
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16
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17 _LIBCPP_BEGIN_NAMESPACE_STD
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18
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19 template <bool>
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20 class __split_buffer_common
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21 {
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22 protected:
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23 void __throw_length_error() const;
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24 void __throw_out_of_range() const;
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25 };
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26
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27 template <class _Tp, class _Allocator = allocator<_Tp> >
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28 struct __split_buffer
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29 : private __split_buffer_common<true>
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30 {
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31 private:
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32 __split_buffer(const __split_buffer&);
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33 __split_buffer& operator=(const __split_buffer&);
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34 public:
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35 typedef _Tp value_type;
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36 typedef _Allocator allocator_type;
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37 typedef typename remove_reference<allocator_type>::type __alloc_rr;
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38 typedef allocator_traits<__alloc_rr> __alloc_traits;
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39 typedef value_type& reference;
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40 typedef const value_type& const_reference;
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41 typedef typename __alloc_traits::size_type size_type;
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42 typedef typename __alloc_traits::difference_type difference_type;
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43 typedef typename __alloc_traits::pointer pointer;
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44 typedef typename __alloc_traits::const_pointer const_pointer;
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45 typedef pointer iterator;
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46 typedef const_pointer const_iterator;
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47
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48 pointer __first_;
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49 pointer __begin_;
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50 pointer __end_;
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51 __compressed_pair<pointer, allocator_type> __end_cap_;
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52
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53 typedef typename add_lvalue_reference<allocator_type>::type __alloc_ref;
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54 typedef typename add_lvalue_reference<allocator_type>::type __alloc_const_ref;
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55
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56 _LIBCPP_INLINE_VISIBILITY __alloc_rr& __alloc() _NOEXCEPT {return __end_cap_.second();}
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57 _LIBCPP_INLINE_VISIBILITY const __alloc_rr& __alloc() const _NOEXCEPT {return __end_cap_.second();}
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58 _LIBCPP_INLINE_VISIBILITY pointer& __end_cap() _NOEXCEPT {return __end_cap_.first();}
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59 _LIBCPP_INLINE_VISIBILITY const pointer& __end_cap() const _NOEXCEPT {return __end_cap_.first();}
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60
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61 _LIBCPP_INLINE_VISIBILITY
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62 __split_buffer()
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63 _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value);
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64 _LIBCPP_INLINE_VISIBILITY
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65 explicit __split_buffer(__alloc_rr& __a);
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66 _LIBCPP_INLINE_VISIBILITY
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67 explicit __split_buffer(const __alloc_rr& __a);
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68 __split_buffer(size_type __cap, size_type __start, __alloc_rr& __a);
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69 ~__split_buffer();
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70
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71 #ifndef _LIBCPP_CXX03_LANG
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72 __split_buffer(__split_buffer&& __c)
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73 _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value);
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74 __split_buffer(__split_buffer&& __c, const __alloc_rr& __a);
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75 __split_buffer& operator=(__split_buffer&& __c)
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76 _NOEXCEPT_((__alloc_traits::propagate_on_container_move_assignment::value &&
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77 is_nothrow_move_assignable<allocator_type>::value) ||
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78 !__alloc_traits::propagate_on_container_move_assignment::value);
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79 #endif // _LIBCPP_CXX03_LANG
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80
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81 _LIBCPP_INLINE_VISIBILITY iterator begin() _NOEXCEPT {return __begin_;}
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82 _LIBCPP_INLINE_VISIBILITY const_iterator begin() const _NOEXCEPT {return __begin_;}
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83 _LIBCPP_INLINE_VISIBILITY iterator end() _NOEXCEPT {return __end_;}
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84 _LIBCPP_INLINE_VISIBILITY const_iterator end() const _NOEXCEPT {return __end_;}
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85
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86 _LIBCPP_INLINE_VISIBILITY
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87 void clear() _NOEXCEPT
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88 {__destruct_at_end(__begin_);}
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89 _LIBCPP_INLINE_VISIBILITY size_type size() const {return static_cast<size_type>(__end_ - __begin_);}
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90 _LIBCPP_INLINE_VISIBILITY bool empty() const {return __end_ == __begin_;}
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91 _LIBCPP_INLINE_VISIBILITY size_type capacity() const {return static_cast<size_type>(__end_cap() - __first_);}
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92 _LIBCPP_INLINE_VISIBILITY size_type __front_spare() const {return static_cast<size_type>(__begin_ - __first_);}
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93 _LIBCPP_INLINE_VISIBILITY size_type __back_spare() const {return static_cast<size_type>(__end_cap() - __end_);}
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94
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95 _LIBCPP_INLINE_VISIBILITY reference front() {return *__begin_;}
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96 _LIBCPP_INLINE_VISIBILITY const_reference front() const {return *__begin_;}
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97 _LIBCPP_INLINE_VISIBILITY reference back() {return *(__end_ - 1);}
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98 _LIBCPP_INLINE_VISIBILITY const_reference back() const {return *(__end_ - 1);}
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99
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100 void reserve(size_type __n);
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101 void shrink_to_fit() _NOEXCEPT;
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102 void push_front(const_reference __x);
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103 _LIBCPP_INLINE_VISIBILITY void push_back(const_reference __x);
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104 #ifndef _LIBCPP_CXX03_LANG
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105 void push_front(value_type&& __x);
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106 void push_back(value_type&& __x);
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107 template <class... _Args>
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108 void emplace_back(_Args&&... __args);
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109 #endif // !defined(_LIBCPP_CXX03_LANG)
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110
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111 _LIBCPP_INLINE_VISIBILITY void pop_front() {__destruct_at_begin(__begin_+1);}
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112 _LIBCPP_INLINE_VISIBILITY void pop_back() {__destruct_at_end(__end_-1);}
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113
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114 void __construct_at_end(size_type __n);
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115 void __construct_at_end(size_type __n, const_reference __x);
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116 template <class _InputIter>
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117 typename enable_if
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118 <
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119 __is_cpp17_input_iterator<_InputIter>::value &&
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120 !__is_cpp17_forward_iterator<_InputIter>::value,
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121 void
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122 >::type
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123 __construct_at_end(_InputIter __first, _InputIter __last);
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124 template <class _ForwardIterator>
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125 typename enable_if
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126 <
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127 __is_cpp17_forward_iterator<_ForwardIterator>::value,
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128 void
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129 >::type
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130 __construct_at_end(_ForwardIterator __first, _ForwardIterator __last);
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131
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132 _LIBCPP_INLINE_VISIBILITY void __destruct_at_begin(pointer __new_begin)
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133 {__destruct_at_begin(__new_begin, is_trivially_destructible<value_type>());}
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134 _LIBCPP_INLINE_VISIBILITY
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135 void __destruct_at_begin(pointer __new_begin, false_type);
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136 _LIBCPP_INLINE_VISIBILITY
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137 void __destruct_at_begin(pointer __new_begin, true_type);
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138
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139 _LIBCPP_INLINE_VISIBILITY
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140 void __destruct_at_end(pointer __new_last) _NOEXCEPT
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141 {__destruct_at_end(__new_last, false_type());}
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142 _LIBCPP_INLINE_VISIBILITY
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143 void __destruct_at_end(pointer __new_last, false_type) _NOEXCEPT;
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144 _LIBCPP_INLINE_VISIBILITY
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145 void __destruct_at_end(pointer __new_last, true_type) _NOEXCEPT;
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146
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147 void swap(__split_buffer& __x)
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148 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value||
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149 __is_nothrow_swappable<__alloc_rr>::value);
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150
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151 bool __invariants() const;
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152
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153 private:
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154 _LIBCPP_INLINE_VISIBILITY
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155 void __move_assign_alloc(__split_buffer& __c, true_type)
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156 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value)
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157 {
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158 __alloc() = _VSTD::move(__c.__alloc());
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159 }
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160
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161 _LIBCPP_INLINE_VISIBILITY
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162 void __move_assign_alloc(__split_buffer&, false_type) _NOEXCEPT
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163 {}
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164
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165 struct _ConstructTransaction {
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166 explicit _ConstructTransaction(pointer* __p, size_type __n) _NOEXCEPT
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167 : __pos_(*__p), __end_(*__p + __n), __dest_(__p) {
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168 }
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169 ~_ConstructTransaction() {
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170 *__dest_ = __pos_;
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171 }
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172 pointer __pos_;
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173 const pointer __end_;
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174 private:
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175 pointer *__dest_;
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176 };
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177 };
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178
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179 template <class _Tp, class _Allocator>
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180 bool
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181 __split_buffer<_Tp, _Allocator>::__invariants() const
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182 {
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183 if (__first_ == nullptr)
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184 {
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185 if (__begin_ != nullptr)
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186 return false;
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187 if (__end_ != nullptr)
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188 return false;
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189 if (__end_cap() != nullptr)
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190 return false;
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191 }
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192 else
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193 {
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194 if (__begin_ < __first_)
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195 return false;
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196 if (__end_ < __begin_)
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197 return false;
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198 if (__end_cap() < __end_)
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199 return false;
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200 }
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201 return true;
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202 }
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203
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204 // Default constructs __n objects starting at __end_
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205 // throws if construction throws
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206 // Precondition: __n > 0
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207 // Precondition: size() + __n <= capacity()
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208 // Postcondition: size() == size() + __n
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209 template <class _Tp, class _Allocator>
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210 void
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211 __split_buffer<_Tp, _Allocator>::__construct_at_end(size_type __n)
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212 {
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213 _ConstructTransaction __tx(&this->__end_, __n);
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214 for (; __tx.__pos_ != __tx.__end_; ++__tx.__pos_) {
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215 __alloc_traits::construct(this->__alloc(), _VSTD::__to_address(__tx.__pos_));
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216 }
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217 }
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218
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219 // Copy constructs __n objects starting at __end_ from __x
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220 // throws if construction throws
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221 // Precondition: __n > 0
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222 // Precondition: size() + __n <= capacity()
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223 // Postcondition: size() == old size() + __n
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224 // Postcondition: [i] == __x for all i in [size() - __n, __n)
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225 template <class _Tp, class _Allocator>
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226 void
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227 __split_buffer<_Tp, _Allocator>::__construct_at_end(size_type __n, const_reference __x)
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228 {
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229 _ConstructTransaction __tx(&this->__end_, __n);
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230 for (; __tx.__pos_ != __tx.__end_; ++__tx.__pos_) {
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231 __alloc_traits::construct(this->__alloc(),
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232 _VSTD::__to_address(__tx.__pos_), __x);
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233 }
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234 }
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235
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236 template <class _Tp, class _Allocator>
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237 template <class _InputIter>
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238 typename enable_if
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239 <
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240 __is_cpp17_input_iterator<_InputIter>::value &&
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241 !__is_cpp17_forward_iterator<_InputIter>::value,
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242 void
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243 >::type
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244 __split_buffer<_Tp, _Allocator>::__construct_at_end(_InputIter __first, _InputIter __last)
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245 {
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246 __alloc_rr& __a = this->__alloc();
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247 for (; __first != __last; ++__first)
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248 {
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249 if (__end_ == __end_cap())
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250 {
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251 size_type __old_cap = __end_cap() - __first_;
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252 size_type __new_cap = _VSTD::max<size_type>(2 * __old_cap, 8);
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253 __split_buffer __buf(__new_cap, 0, __a);
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254 for (pointer __p = __begin_; __p != __end_; ++__p, ++__buf.__end_)
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255 __alloc_traits::construct(__buf.__alloc(),
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256 _VSTD::__to_address(__buf.__end_), _VSTD::move(*__p));
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257 swap(__buf);
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258 }
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259 __alloc_traits::construct(__a, _VSTD::__to_address(this->__end_), *__first);
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260 ++this->__end_;
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261 }
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262 }
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263
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264 template <class _Tp, class _Allocator>
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265 template <class _ForwardIterator>
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266 typename enable_if
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267 <
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268 __is_cpp17_forward_iterator<_ForwardIterator>::value,
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269 void
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270 >::type
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271 __split_buffer<_Tp, _Allocator>::__construct_at_end(_ForwardIterator __first, _ForwardIterator __last)
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272 {
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273 _ConstructTransaction __tx(&this->__end_, std::distance(__first, __last));
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274 for (; __tx.__pos_ != __tx.__end_; ++__tx.__pos_, ++__first) {
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275 __alloc_traits::construct(this->__alloc(),
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276 _VSTD::__to_address(__tx.__pos_), *__first);
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277 }
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278 }
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279
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280 template <class _Tp, class _Allocator>
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281 inline
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282 void
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283 __split_buffer<_Tp, _Allocator>::__destruct_at_begin(pointer __new_begin, false_type)
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284 {
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285 while (__begin_ != __new_begin)
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286 __alloc_traits::destroy(__alloc(), __to_address(__begin_++));
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287 }
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288
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289 template <class _Tp, class _Allocator>
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290 inline
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291 void
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292 __split_buffer<_Tp, _Allocator>::__destruct_at_begin(pointer __new_begin, true_type)
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293 {
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294 __begin_ = __new_begin;
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295 }
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296
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297 template <class _Tp, class _Allocator>
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298 inline _LIBCPP_INLINE_VISIBILITY
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299 void
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300 __split_buffer<_Tp, _Allocator>::__destruct_at_end(pointer __new_last, false_type) _NOEXCEPT
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301 {
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302 while (__new_last != __end_)
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303 __alloc_traits::destroy(__alloc(), __to_address(--__end_));
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304 }
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305
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306 template <class _Tp, class _Allocator>
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307 inline _LIBCPP_INLINE_VISIBILITY
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308 void
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309 __split_buffer<_Tp, _Allocator>::__destruct_at_end(pointer __new_last, true_type) _NOEXCEPT
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310 {
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311 __end_ = __new_last;
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312 }
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313
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314 template <class _Tp, class _Allocator>
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315 __split_buffer<_Tp, _Allocator>::__split_buffer(size_type __cap, size_type __start, __alloc_rr& __a)
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316 : __end_cap_(nullptr, __a)
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317 {
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318 __first_ = __cap != 0 ? __alloc_traits::allocate(__alloc(), __cap) : nullptr;
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319 __begin_ = __end_ = __first_ + __start;
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320 __end_cap() = __first_ + __cap;
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321 }
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322
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323 template <class _Tp, class _Allocator>
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324 inline
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325 __split_buffer<_Tp, _Allocator>::__split_buffer()
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326 _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value)
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327 : __first_(nullptr), __begin_(nullptr), __end_(nullptr), __end_cap_(nullptr, __default_init_tag())
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328 {
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329 }
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330
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331 template <class _Tp, class _Allocator>
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332 inline
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333 __split_buffer<_Tp, _Allocator>::__split_buffer(__alloc_rr& __a)
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334 : __first_(nullptr), __begin_(nullptr), __end_(nullptr), __end_cap_(nullptr, __a)
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335 {
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336 }
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337
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338 template <class _Tp, class _Allocator>
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339 inline
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340 __split_buffer<_Tp, _Allocator>::__split_buffer(const __alloc_rr& __a)
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341 : __first_(nullptr), __begin_(nullptr), __end_(nullptr), __end_cap_(nullptr, __a)
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342 {
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343 }
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344
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345 template <class _Tp, class _Allocator>
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346 __split_buffer<_Tp, _Allocator>::~__split_buffer()
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347 {
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348 clear();
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349 if (__first_)
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350 __alloc_traits::deallocate(__alloc(), __first_, capacity());
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351 }
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352
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353 #ifndef _LIBCPP_CXX03_LANG
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354
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355 template <class _Tp, class _Allocator>
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356 __split_buffer<_Tp, _Allocator>::__split_buffer(__split_buffer&& __c)
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357 _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value)
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358 : __first_(_VSTD::move(__c.__first_)),
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359 __begin_(_VSTD::move(__c.__begin_)),
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360 __end_(_VSTD::move(__c.__end_)),
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361 __end_cap_(_VSTD::move(__c.__end_cap_))
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362 {
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363 __c.__first_ = nullptr;
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364 __c.__begin_ = nullptr;
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365 __c.__end_ = nullptr;
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366 __c.__end_cap() = nullptr;
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367 }
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368
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369 template <class _Tp, class _Allocator>
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370 __split_buffer<_Tp, _Allocator>::__split_buffer(__split_buffer&& __c, const __alloc_rr& __a)
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371 : __end_cap_(nullptr, __a)
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372 {
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373 if (__a == __c.__alloc())
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374 {
|
|
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375 __first_ = __c.__first_;
|
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376 __begin_ = __c.__begin_;
|
|
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377 __end_ = __c.__end_;
|
|
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378 __end_cap() = __c.__end_cap();
|
|
|
379 __c.__first_ = nullptr;
|
|
|
380 __c.__begin_ = nullptr;
|
|
|
381 __c.__end_ = nullptr;
|
|
|
382 __c.__end_cap() = nullptr;
|
|
|
383 }
|
|
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384 else
|
|
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385 {
|
|
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386 size_type __cap = __c.size();
|
|
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387 __first_ = __alloc_traits::allocate(__alloc(), __cap);
|
|
|
388 __begin_ = __end_ = __first_;
|
|
|
389 __end_cap() = __first_ + __cap;
|
|
|
390 typedef move_iterator<iterator> _Ip;
|
|
|
391 __construct_at_end(_Ip(__c.begin()), _Ip(__c.end()));
|
|
|
392 }
|
|
|
393 }
|
|
|
394
|
|
|
395 template <class _Tp, class _Allocator>
|
|
|
396 __split_buffer<_Tp, _Allocator>&
|
|
|
397 __split_buffer<_Tp, _Allocator>::operator=(__split_buffer&& __c)
|
|
|
398 _NOEXCEPT_((__alloc_traits::propagate_on_container_move_assignment::value &&
|
|
|
399 is_nothrow_move_assignable<allocator_type>::value) ||
|
|
|
400 !__alloc_traits::propagate_on_container_move_assignment::value)
|
|
|
401 {
|
|
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402 clear();
|
|
|
403 shrink_to_fit();
|
|
|
404 __first_ = __c.__first_;
|
|
|
405 __begin_ = __c.__begin_;
|
|
|
406 __end_ = __c.__end_;
|
|
|
407 __end_cap() = __c.__end_cap();
|
|
|
408 __move_assign_alloc(__c,
|
|
|
409 integral_constant<bool,
|
|
|
410 __alloc_traits::propagate_on_container_move_assignment::value>());
|
|
|
411 __c.__first_ = __c.__begin_ = __c.__end_ = __c.__end_cap() = nullptr;
|
|
|
412 return *this;
|
|
|
413 }
|
|
|
414
|
|
|
415 #endif // _LIBCPP_CXX03_LANG
|
|
|
416
|
|
|
417 template <class _Tp, class _Allocator>
|
|
|
418 void
|
|
|
419 __split_buffer<_Tp, _Allocator>::swap(__split_buffer& __x)
|
|
|
420 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value||
|
|
|
421 __is_nothrow_swappable<__alloc_rr>::value)
|
|
|
422 {
|
|
|
423 _VSTD::swap(__first_, __x.__first_);
|
|
|
424 _VSTD::swap(__begin_, __x.__begin_);
|
|
|
425 _VSTD::swap(__end_, __x.__end_);
|
|
|
426 _VSTD::swap(__end_cap(), __x.__end_cap());
|
|
|
427 __swap_allocator(__alloc(), __x.__alloc());
|
|
|
428 }
|
|
|
429
|
|
|
430 template <class _Tp, class _Allocator>
|
|
|
431 void
|
|
|
432 __split_buffer<_Tp, _Allocator>::reserve(size_type __n)
|
|
|
433 {
|
|
|
434 if (__n < capacity())
|
|
|
435 {
|
|
|
436 __split_buffer<value_type, __alloc_rr&> __t(__n, 0, __alloc());
|
|
|
437 __t.__construct_at_end(move_iterator<pointer>(__begin_),
|
|
|
438 move_iterator<pointer>(__end_));
|
|
|
439 _VSTD::swap(__first_, __t.__first_);
|
|
|
440 _VSTD::swap(__begin_, __t.__begin_);
|
|
|
441 _VSTD::swap(__end_, __t.__end_);
|
|
|
442 _VSTD::swap(__end_cap(), __t.__end_cap());
|
|
|
443 }
|
|
|
444 }
|
|
|
445
|
|
|
446 template <class _Tp, class _Allocator>
|
|
|
447 void
|
|
|
448 __split_buffer<_Tp, _Allocator>::shrink_to_fit() _NOEXCEPT
|
|
|
449 {
|
|
|
450 if (capacity() > size())
|
|
|
451 {
|
|
|
452 #ifndef _LIBCPP_NO_EXCEPTIONS
|
|
|
453 try
|
|
|
454 {
|
|
|
455 #endif // _LIBCPP_NO_EXCEPTIONS
|
|
|
456 __split_buffer<value_type, __alloc_rr&> __t(size(), 0, __alloc());
|
|
|
457 __t.__construct_at_end(move_iterator<pointer>(__begin_),
|
|
|
458 move_iterator<pointer>(__end_));
|
|
|
459 __t.__end_ = __t.__begin_ + (__end_ - __begin_);
|
|
|
460 _VSTD::swap(__first_, __t.__first_);
|
|
|
461 _VSTD::swap(__begin_, __t.__begin_);
|
|
|
462 _VSTD::swap(__end_, __t.__end_);
|
|
|
463 _VSTD::swap(__end_cap(), __t.__end_cap());
|
|
|
464 #ifndef _LIBCPP_NO_EXCEPTIONS
|
|
|
465 }
|
|
|
466 catch (...)
|
|
|
467 {
|
|
|
468 }
|
|
|
469 #endif // _LIBCPP_NO_EXCEPTIONS
|
|
|
470 }
|
|
|
471 }
|
|
|
472
|
|
|
473 template <class _Tp, class _Allocator>
|
|
|
474 void
|
|
|
475 __split_buffer<_Tp, _Allocator>::push_front(const_reference __x)
|
|
|
476 {
|
|
|
477 if (__begin_ == __first_)
|
|
|
478 {
|
|
|
479 if (__end_ < __end_cap())
|
|
|
480 {
|
|
|
481 difference_type __d = __end_cap() - __end_;
|
|
|
482 __d = (__d + 1) / 2;
|
|
|
483 __begin_ = _VSTD::move_backward(__begin_, __end_, __end_ + __d);
|
|
|
484 __end_ += __d;
|
|
|
485 }
|
|
|
486 else
|
|
|
487 {
|
|
|
488 size_type __c = max<size_type>(2 * static_cast<size_t>(__end_cap() - __first_), 1);
|
|
|
489 __split_buffer<value_type, __alloc_rr&> __t(__c, (__c + 3) / 4, __alloc());
|
|
|
490 __t.__construct_at_end(move_iterator<pointer>(__begin_),
|
|
|
491 move_iterator<pointer>(__end_));
|
|
|
492 _VSTD::swap(__first_, __t.__first_);
|
|
|
493 _VSTD::swap(__begin_, __t.__begin_);
|
|
|
494 _VSTD::swap(__end_, __t.__end_);
|
|
|
495 _VSTD::swap(__end_cap(), __t.__end_cap());
|
|
|
496 }
|
|
|
497 }
|
|
|
498 __alloc_traits::construct(__alloc(), _VSTD::__to_address(__begin_-1), __x);
|
|
|
499 --__begin_;
|
|
|
500 }
|
|
|
501
|
|
|
502 #ifndef _LIBCPP_CXX03_LANG
|
|
|
503
|
|
|
504 template <class _Tp, class _Allocator>
|
|
|
505 void
|
|
|
506 __split_buffer<_Tp, _Allocator>::push_front(value_type&& __x)
|
|
|
507 {
|
|
|
508 if (__begin_ == __first_)
|
|
|
509 {
|
|
|
510 if (__end_ < __end_cap())
|
|
|
511 {
|
|
|
512 difference_type __d = __end_cap() - __end_;
|
|
|
513 __d = (__d + 1) / 2;
|
|
|
514 __begin_ = _VSTD::move_backward(__begin_, __end_, __end_ + __d);
|
|
|
515 __end_ += __d;
|
|
|
516 }
|
|
|
517 else
|
|
|
518 {
|
|
|
519 size_type __c = max<size_type>(2 * static_cast<size_t>(__end_cap() - __first_), 1);
|
|
|
520 __split_buffer<value_type, __alloc_rr&> __t(__c, (__c + 3) / 4, __alloc());
|
|
|
521 __t.__construct_at_end(move_iterator<pointer>(__begin_),
|
|
|
522 move_iterator<pointer>(__end_));
|
|
|
523 _VSTD::swap(__first_, __t.__first_);
|
|
|
524 _VSTD::swap(__begin_, __t.__begin_);
|
|
|
525 _VSTD::swap(__end_, __t.__end_);
|
|
|
526 _VSTD::swap(__end_cap(), __t.__end_cap());
|
|
|
527 }
|
|
|
528 }
|
|
|
529 __alloc_traits::construct(__alloc(), _VSTD::__to_address(__begin_-1),
|
|
|
530 _VSTD::move(__x));
|
|
|
531 --__begin_;
|
|
|
532 }
|
|
|
533
|
|
|
534 #endif // _LIBCPP_CXX03_LANG
|
|
|
535
|
|
|
536 template <class _Tp, class _Allocator>
|
|
|
537 inline _LIBCPP_INLINE_VISIBILITY
|
|
|
538 void
|
|
|
539 __split_buffer<_Tp, _Allocator>::push_back(const_reference __x)
|
|
|
540 {
|
|
|
541 if (__end_ == __end_cap())
|
|
|
542 {
|
|
|
543 if (__begin_ > __first_)
|
|
|
544 {
|
|
|
545 difference_type __d = __begin_ - __first_;
|
|
|
546 __d = (__d + 1) / 2;
|
|
|
547 __end_ = _VSTD::move(__begin_, __end_, __begin_ - __d);
|
|
|
548 __begin_ -= __d;
|
|
|
549 }
|
|
|
550 else
|
|
|
551 {
|
|
|
552 size_type __c = max<size_type>(2 * static_cast<size_t>(__end_cap() - __first_), 1);
|
|
|
553 __split_buffer<value_type, __alloc_rr&> __t(__c, __c / 4, __alloc());
|
|
|
554 __t.__construct_at_end(move_iterator<pointer>(__begin_),
|
|
|
555 move_iterator<pointer>(__end_));
|
|
|
556 _VSTD::swap(__first_, __t.__first_);
|
|
|
557 _VSTD::swap(__begin_, __t.__begin_);
|
|
|
558 _VSTD::swap(__end_, __t.__end_);
|
|
|
559 _VSTD::swap(__end_cap(), __t.__end_cap());
|
|
|
560 }
|
|
|
561 }
|
|
|
562 __alloc_traits::construct(__alloc(), _VSTD::__to_address(__end_), __x);
|
|
|
563 ++__end_;
|
|
|
564 }
|
|
|
565
|
|
|
566 #ifndef _LIBCPP_CXX03_LANG
|
|
|
567
|
|
|
568 template <class _Tp, class _Allocator>
|
|
|
569 void
|
|
|
570 __split_buffer<_Tp, _Allocator>::push_back(value_type&& __x)
|
|
|
571 {
|
|
|
572 if (__end_ == __end_cap())
|
|
|
573 {
|
|
|
574 if (__begin_ > __first_)
|
|
|
575 {
|
|
|
576 difference_type __d = __begin_ - __first_;
|
|
|
577 __d = (__d + 1) / 2;
|
|
|
578 __end_ = _VSTD::move(__begin_, __end_, __begin_ - __d);
|
|
|
579 __begin_ -= __d;
|
|
|
580 }
|
|
|
581 else
|
|
|
582 {
|
|
|
583 size_type __c = max<size_type>(2 * static_cast<size_t>(__end_cap() - __first_), 1);
|
|
|
584 __split_buffer<value_type, __alloc_rr&> __t(__c, __c / 4, __alloc());
|
|
|
585 __t.__construct_at_end(move_iterator<pointer>(__begin_),
|
|
|
586 move_iterator<pointer>(__end_));
|
|
|
587 _VSTD::swap(__first_, __t.__first_);
|
|
|
588 _VSTD::swap(__begin_, __t.__begin_);
|
|
|
589 _VSTD::swap(__end_, __t.__end_);
|
|
|
590 _VSTD::swap(__end_cap(), __t.__end_cap());
|
|
|
591 }
|
|
|
592 }
|
|
|
593 __alloc_traits::construct(__alloc(), _VSTD::__to_address(__end_),
|
|
|
594 _VSTD::move(__x));
|
|
|
595 ++__end_;
|
|
|
596 }
|
|
|
597
|
|
|
598 template <class _Tp, class _Allocator>
|
|
|
599 template <class... _Args>
|
|
|
600 void
|
|
|
601 __split_buffer<_Tp, _Allocator>::emplace_back(_Args&&... __args)
|
|
|
602 {
|
|
|
603 if (__end_ == __end_cap())
|
|
|
604 {
|
|
|
605 if (__begin_ > __first_)
|
|
|
606 {
|
|
|
607 difference_type __d = __begin_ - __first_;
|
|
|
608 __d = (__d + 1) / 2;
|
|
|
609 __end_ = _VSTD::move(__begin_, __end_, __begin_ - __d);
|
|
|
610 __begin_ -= __d;
|
|
|
611 }
|
|
|
612 else
|
|
|
613 {
|
|
|
614 size_type __c = max<size_type>(2 * static_cast<size_t>(__end_cap() - __first_), 1);
|
|
|
615 __split_buffer<value_type, __alloc_rr&> __t(__c, __c / 4, __alloc());
|
|
|
616 __t.__construct_at_end(move_iterator<pointer>(__begin_),
|
|
|
617 move_iterator<pointer>(__end_));
|
|
|
618 _VSTD::swap(__first_, __t.__first_);
|
|
|
619 _VSTD::swap(__begin_, __t.__begin_);
|
|
|
620 _VSTD::swap(__end_, __t.__end_);
|
|
|
621 _VSTD::swap(__end_cap(), __t.__end_cap());
|
|
|
622 }
|
|
|
623 }
|
|
|
624 __alloc_traits::construct(__alloc(), _VSTD::__to_address(__end_),
|
|
|
625 _VSTD::forward<_Args>(__args)...);
|
|
|
626 ++__end_;
|
|
|
627 }
|
|
|
628
|
|
|
629 #endif // _LIBCPP_CXX03_LANG
|
|
|
630
|
|
|
631 template <class _Tp, class _Allocator>
|
|
|
632 inline _LIBCPP_INLINE_VISIBILITY
|
|
|
633 void
|
|
|
634 swap(__split_buffer<_Tp, _Allocator>& __x, __split_buffer<_Tp, _Allocator>& __y)
|
|
|
635 _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
|
|
|
636 {
|
|
|
637 __x.swap(__y);
|
|
|
638 }
|
|
|
639
|
|
|
640 _LIBCPP_END_NAMESPACE_STD
|
|
|
641
|
|
|
642 _LIBCPP_POP_MACROS
|
|
|
643
|
|
|
644 #endif // _LIBCPP_SPLIT_BUFFER
|
