| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2023 Vinnie Falco (vinnie.falco@gmail.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 | // Official repository: https://github.com/cppalliance/buffers | ||
| 8 | // | ||
| 9 | |||
| 10 | #ifndef BOOST_BUFFERS_ANY_DYNAMIC_BUFFER_HPP | ||
| 11 | #define BOOST_BUFFERS_ANY_DYNAMIC_BUFFER_HPP | ||
| 12 | |||
| 13 | #include <boost/buffers/detail/config.hpp> | ||
| 14 | #include <boost/buffers/const_buffer_span.hpp> | ||
| 15 | #include <boost/buffers/mutable_buffer_span.hpp> | ||
| 16 | #include <boost/buffers/range.hpp> | ||
| 17 | #include <boost/buffers/type_traits.hpp> | ||
| 18 | #include <cstdlib> | ||
| 19 | |||
| 20 | namespace boost { | ||
| 21 | namespace buffers { | ||
| 22 | |||
| 23 | /** An abstract, type-erased dynamic buffer. | ||
| 24 | */ | ||
| 25 | struct BOOST_SYMBOL_VISIBLE | ||
| 26 | any_dynamic_buffer | ||
| 27 | { | ||
| 28 | using const_buffers_type = | ||
| 29 | buffers::const_buffer_span; | ||
| 30 | |||
| 31 | using mutable_buffers_type = | ||
| 32 | buffers::mutable_buffer_span; | ||
| 33 | |||
| 34 | 8192 | virtual ~any_dynamic_buffer() = default; | |
| 35 | virtual std::size_t size() const = 0; | ||
| 36 | virtual std::size_t max_size() const = 0; | ||
| 37 | virtual std::size_t capacity() const = 0; | ||
| 38 | virtual const_buffers_type data() const = 0; | ||
| 39 | virtual mutable_buffers_type prepare(std::size_t) = 0; | ||
| 40 | virtual void commit(std::size_t) = 0; | ||
| 41 | virtual void consume(std::size_t) = 0; | ||
| 42 | }; | ||
| 43 | |||
| 44 | //----------------------------------------------- | ||
| 45 | |||
| 46 | /** A type-erased dynamic buffer. | ||
| 47 | */ | ||
| 48 | template< | ||
| 49 | class DynamicBuffer, | ||
| 50 | std::size_t N = 8> | ||
| 51 | class any_dynamic_buffer_impl | ||
| 52 | : public any_dynamic_buffer | ||
| 53 | { | ||
| 54 | DynamicBuffer b_; | ||
| 55 | buffers::const_buffer data_[N]; | ||
| 56 | buffers::mutable_buffer out_[N]; | ||
| 57 | std::size_t data_len_ = 0; | ||
| 58 | std::size_t out_len_ = 0; | ||
| 59 | |||
| 60 | template<class Buffers> | ||
| 61 | static | ||
| 62 | std::size_t | ||
| 63 | 69760 | unroll( | |
| 64 | Buffers const& bs, | ||
| 65 | value_type<Buffers>* dest, | ||
| 66 | std::size_t len) | ||
| 67 | { | ||
| 68 | 69760 | std::size_t i = 0; | |
| 69 |
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209280 | for(auto b : buffers::range(bs)) |
| 70 | { | ||
| 71 | 139520 | dest[i++] = b; | |
| 72 |
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139520 | if(i == len) |
| 73 | ✗ | break; | |
| 74 | } | ||
| 75 | 69760 | return i; | |
| 76 | } | ||
| 77 | |||
| 78 | public: | ||
| 79 | template<class DynamicBuffer_> | ||
| 80 | explicit | ||
| 81 | 4096 | any_dynamic_buffer_impl( | |
| 82 | DynamicBuffer_&& b) | ||
| 83 | 4096 | : b_(std::forward< | |
| 84 | 4096 | DynamicBuffer_>(b)) | |
| 85 | { | ||
| 86 | 4096 | } | |
| 87 | |||
| 88 | DynamicBuffer& | ||
| 89 | buffer() noexcept | ||
| 90 | { | ||
| 91 | return b_; | ||
| 92 | } | ||
| 93 | |||
| 94 | DynamicBuffer const& | ||
| 95 | buffer() const noexcept | ||
| 96 | { | ||
| 97 | return b_; | ||
| 98 | } | ||
| 99 | |||
| 100 | std::size_t | ||
| 101 | ✗ | size() const override | |
| 102 | { | ||
| 103 | ✗ | return b_.size(); | |
| 104 | } | ||
| 105 | |||
| 106 | std::size_t | ||
| 107 | ✗ | max_size() const override | |
| 108 | { | ||
| 109 | ✗ | return b_.max_size(); | |
| 110 | } | ||
| 111 | |||
| 112 | std::size_t | ||
| 113 | ✗ | capacity() const override | |
| 114 | { | ||
| 115 | ✗ | return b_.capacity(); | |
| 116 | } | ||
| 117 | |||
| 118 | const_buffers_type | ||
| 119 | 12288 | data() const override | |
| 120 | { | ||
| 121 | 24576 | return const_buffers_type( | |
| 122 | 12288 | data_, data_len_); | |
| 123 | } | ||
| 124 | |||
| 125 | auto | ||
| 126 | 11792 | prepare( | |
| 127 | std::size_t n) -> | ||
| 128 | mutable_buffers_type override | ||
| 129 | { | ||
| 130 | 11792 | out_len_ = unroll( | |
| 131 | 11792 | b_.prepare(n), out_, N); | |
| 132 | 23584 | return mutable_buffers_type( | |
| 133 | 11792 | out_, out_len_); | |
| 134 | } | ||
| 135 | |||
| 136 | void | ||
| 137 | 11792 | commit( | |
| 138 | std::size_t n) override | ||
| 139 | { | ||
| 140 | 11792 | b_.commit(n); | |
| 141 | 11792 | data_len_ = unroll( | |
| 142 | 11792 | b_.data(), data_, N); | |
| 143 | 11792 | } | |
| 144 | |||
| 145 | void | ||
| 146 | 11296 | consume( | |
| 147 | std::size_t n) override | ||
| 148 | { | ||
| 149 | 11296 | b_.consume(n); | |
| 150 | 11296 | data_len_ = unroll( | |
| 151 | 11296 | b_.data(), data_, N); | |
| 152 | 11296 | } | |
| 153 | }; | ||
| 154 | |||
| 155 | template< | ||
| 156 | class DynamicBuffer | ||
| 157 | , class = typename std::enable_if< | ||
| 158 | is_dynamic_buffer< | ||
| 159 | typename std::decay<DynamicBuffer>::type | ||
| 160 | >::value>::type | ||
| 161 | > | ||
| 162 | auto | ||
| 163 | 4096 | make_any(DynamicBuffer&& b) -> | |
| 164 | any_dynamic_buffer_impl<typename | ||
| 165 | std::decay<DynamicBuffer>::type> | ||
| 166 | { | ||
| 167 | return any_dynamic_buffer_impl<typename | ||
| 168 | std::decay<DynamicBuffer>::type>( | ||
| 169 | 4096 | std::forward<DynamicBuffer>(b)); | |
| 170 | } | ||
| 171 | |||
| 172 | } // buffers | ||
| 173 | } // boost | ||
| 174 | |||
| 175 | #endif | ||
| 176 |