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1 | // |
2 | // Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot com) | |
3 | // | |
4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | // | |
7 | ||
8 | #ifndef BEAST_HTTP_DETAIL_BASIC_FIELDS_HPP | |
9 | #define BEAST_HTTP_DETAIL_BASIC_FIELDS_HPP | |
10 | ||
11 | #include <beast/core/detail/ci_char_traits.hpp> | |
12 | #include <boost/intrusive/list.hpp> | |
13 | #include <boost/intrusive/set.hpp> | |
14 | #include <boost/utility/string_ref.hpp> | |
15 | ||
16 | namespace beast { | |
17 | namespace http { | |
18 | ||
19 | template<class Allocator> | |
20 | class basic_fields; | |
21 | ||
22 | namespace detail { | |
23 | ||
24 | class basic_fields_base | |
25 | { | |
26 | public: | |
27 | struct value_type | |
28 | { | |
29 | std::string first; | |
30 | std::string second; | |
31 | ||
32 | value_type(boost::string_ref const& name_, | |
33 | boost::string_ref const& value_) | |
34 | : first(name_) | |
35 | , second(value_) | |
36 | { | |
37 | } | |
38 | ||
39 | boost::string_ref | |
40 | name() const | |
41 | { | |
42 | return first; | |
43 | } | |
44 | ||
45 | boost::string_ref | |
46 | value() const | |
47 | { | |
48 | return second; | |
49 | } | |
50 | }; | |
51 | ||
52 | protected: | |
53 | template<class Allocator> | |
54 | friend class beast::http::basic_fields; | |
55 | ||
56 | struct element | |
57 | : boost::intrusive::set_base_hook < | |
58 | boost::intrusive::link_mode < | |
59 | boost::intrusive::normal_link>> | |
60 | , boost::intrusive::list_base_hook < | |
61 | boost::intrusive::link_mode < | |
62 | boost::intrusive::normal_link>> | |
63 | { | |
64 | value_type data; | |
65 | ||
66 | element(boost::string_ref const& name, | |
67 | boost::string_ref const& value) | |
68 | : data(name, value) | |
69 | { | |
70 | } | |
71 | }; | |
72 | ||
73 | struct less : private beast::detail::ci_less | |
74 | { | |
75 | template<class String> | |
76 | bool | |
77 | operator()(String const& lhs, element const& rhs) const | |
78 | { | |
79 | return ci_less::operator()(lhs, rhs.data.first); | |
80 | } | |
81 | ||
82 | template<class String> | |
83 | bool | |
84 | operator()(element const& lhs, String const& rhs) const | |
85 | { | |
86 | return ci_less::operator()(lhs.data.first, rhs); | |
87 | } | |
88 | ||
89 | bool | |
90 | operator()(element const& lhs, element const& rhs) const | |
91 | { | |
92 | return ci_less::operator()( | |
93 | lhs.data.first, rhs.data.first); | |
94 | } | |
95 | }; | |
96 | ||
97 | using list_t = boost::intrusive::make_list<element, | |
98 | boost::intrusive::constant_time_size<false>>::type; | |
99 | ||
100 | using set_t = boost::intrusive::make_multiset<element, | |
101 | boost::intrusive::constant_time_size<true>, | |
102 | boost::intrusive::compare<less>>::type; | |
103 | ||
104 | // data | |
105 | set_t set_; | |
106 | list_t list_; | |
107 | ||
108 | basic_fields_base(set_t&& set, list_t&& list) | |
109 | : set_(std::move(set)) | |
110 | , list_(std::move(list)) | |
111 | { | |
112 | } | |
113 | ||
114 | public: | |
115 | class const_iterator; | |
116 | ||
117 | using iterator = const_iterator; | |
118 | ||
119 | basic_fields_base() = default; | |
120 | }; | |
121 | ||
122 | //------------------------------------------------------------------------------ | |
123 | ||
124 | class basic_fields_base::const_iterator | |
125 | { | |
126 | using iter_type = list_t::const_iterator; | |
127 | ||
128 | iter_type it_; | |
129 | ||
130 | template<class Allocator> | |
131 | friend class beast::http::basic_fields; | |
132 | ||
133 | friend class basic_fields_base; | |
134 | ||
135 | const_iterator(iter_type it) | |
136 | : it_(it) | |
137 | { | |
138 | } | |
139 | ||
140 | public: | |
141 | using value_type = | |
142 | typename basic_fields_base::value_type; | |
143 | using pointer = value_type const*; | |
144 | using reference = value_type const&; | |
145 | using difference_type = std::ptrdiff_t; | |
146 | using iterator_category = | |
147 | std::bidirectional_iterator_tag; | |
148 | ||
149 | const_iterator() = default; | |
150 | const_iterator(const_iterator&& other) = default; | |
151 | const_iterator(const_iterator const& other) = default; | |
152 | const_iterator& operator=(const_iterator&& other) = default; | |
153 | const_iterator& operator=(const_iterator const& other) = default; | |
154 | ||
155 | bool | |
156 | operator==(const_iterator const& other) const | |
157 | { | |
158 | return it_ == other.it_; | |
159 | } | |
160 | ||
161 | bool | |
162 | operator!=(const_iterator const& other) const | |
163 | { | |
164 | return !(*this == other); | |
165 | } | |
166 | ||
167 | reference | |
168 | operator*() const | |
169 | { | |
170 | return it_->data; | |
171 | } | |
172 | ||
173 | pointer | |
174 | operator->() const | |
175 | { | |
176 | return &**this; | |
177 | } | |
178 | ||
179 | const_iterator& | |
180 | operator++() | |
181 | { | |
182 | ++it_; | |
183 | return *this; | |
184 | } | |
185 | ||
186 | const_iterator | |
187 | operator++(int) | |
188 | { | |
189 | auto temp = *this; | |
190 | ++(*this); | |
191 | return temp; | |
192 | } | |
193 | ||
194 | const_iterator& | |
195 | operator--() | |
196 | { | |
197 | --it_; | |
198 | return *this; | |
199 | } | |
200 | ||
201 | const_iterator | |
202 | operator--(int) | |
203 | { | |
204 | auto temp = *this; | |
205 | --(*this); | |
206 | return temp; | |
207 | } | |
208 | }; | |
209 | ||
210 | } // detail | |
211 | } // http | |
212 | } // beast | |
213 | ||
214 | #endif |