| 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_CONST_BUFFER_SPAN_HPP | ||
| 11 | #define BOOST_BUFFERS_CONST_BUFFER_SPAN_HPP | ||
| 12 | |||
| 13 | #include <boost/buffers/detail/config.hpp> | ||
| 14 | #include <boost/buffers/const_buffer.hpp> | ||
| 15 | #include <boost/buffers/const_buffer_subspan.hpp> | ||
| 16 | #include <boost/buffers/type_traits.hpp> | ||
| 17 | |||
| 18 | namespace boost { | ||
| 19 | namespace buffers { | ||
| 20 | |||
| 21 | /** Holds a span of buffers that cannot be modified. | ||
| 22 | |||
| 23 | Objects of this type meet the requirements | ||
| 24 | of <em>ConstBufferSequence</em>. | ||
| 25 | */ | ||
| 26 | class const_buffer_span | ||
| 27 | { | ||
| 28 | const_buffer const* p_ = nullptr; | ||
| 29 | std::size_t n_ = 0; | ||
| 30 | |||
| 31 | friend class const_buffer_subspan; | ||
| 32 | |||
| 33 | public: | ||
| 34 | /** The type of buffer. | ||
| 35 | */ | ||
| 36 | using value_type = const_buffer; | ||
| 37 | |||
| 38 | /** The type of iterators returned. | ||
| 39 | */ | ||
| 40 | using const_iterator = value_type const*; | ||
| 41 | |||
| 42 | /** Constructor. | ||
| 43 | */ | ||
| 44 | const_buffer_span() = default; | ||
| 45 | |||
| 46 | /** Constructor. | ||
| 47 | */ | ||
| 48 | 16673 | const_buffer_span( | |
| 49 | const_buffer const* p, | ||
| 50 | std::size_t n) noexcept | ||
| 51 | 16673 | : p_(p) | |
| 52 | 16673 | , n_(n) | |
| 53 | { | ||
| 54 | 16673 | } | |
| 55 | |||
| 56 | /** Constructor. | ||
| 57 | */ | ||
| 58 | template< | ||
| 59 | class ConstBufferSequence | ||
| 60 | , class = typename std::enable_if< | ||
| 61 | ! std::is_same< | ||
| 62 | ConstBufferSequence, | ||
| 63 | const_buffer_span>::value && | ||
| 64 | is_const_buffer_sequence< | ||
| 65 | ConstBufferSequence>::value && | ||
| 66 | std::is_same<decltype( | ||
| 67 | std::declval<ConstBufferSequence | ||
| 68 | const&>().begin()), | ||
| 69 | const_buffer const*>::value | ||
| 70 | >::type | ||
| 71 | > | ||
| 72 | explicit | ||
| 73 | 1 | const_buffer_span( | |
| 74 | ConstBufferSequence const& bs) noexcept | ||
| 75 | 1 | : p_(bs.begin()) | |
| 76 | 1 | , n_(bs.end() - bs.begin()) | |
| 77 | { | ||
| 78 | 1 | } | |
| 79 | |||
| 80 | /** Constructor. | ||
| 81 | */ | ||
| 82 | const_buffer_span( | ||
| 83 | const_buffer_span const&) = default; | ||
| 84 | |||
| 85 | /** Assignment. | ||
| 86 | */ | ||
| 87 | const_buffer_span& operator=( | ||
| 88 | const_buffer_span const&) = default; | ||
| 89 | |||
| 90 | /** Return an iterator to the beginning. | ||
| 91 | */ | ||
| 92 | const_iterator | ||
| 93 | 54087 | begin() const noexcept | |
| 94 | { | ||
| 95 | 54087 | return p_; | |
| 96 | } | ||
| 97 | |||
| 98 | /** Return an iterator to the end. | ||
| 99 | */ | ||
| 100 | const_iterator | ||
| 101 | 54087 | end() const noexcept | |
| 102 | { | ||
| 103 | 54087 | return p_ + n_; | |
| 104 | } | ||
| 105 | |||
| 106 | friend | ||
| 107 | const_buffer_subspan | ||
| 108 | 139638 | tag_invoke( | |
| 109 | prefix_tag const&, | ||
| 110 | const_buffer_span const& s, | ||
| 111 | std::size_t n) noexcept | ||
| 112 | { | ||
| 113 | 139638 | return s.prefix_impl(n); | |
| 114 | } | ||
| 115 | |||
| 116 | friend | ||
| 117 | const_buffer_subspan | ||
| 118 | 139638 | tag_invoke( | |
| 119 | suffix_tag const&, | ||
| 120 | const_buffer_span const& s, | ||
| 121 | std::size_t n) noexcept | ||
| 122 | { | ||
| 123 | 139638 | return s.suffix_impl(n); | |
| 124 | } | ||
| 125 | |||
| 126 | private: | ||
| 127 | inline | ||
| 128 | const_buffer_subspan | ||
| 129 | prefix_impl(std::size_t n) const noexcept; | ||
| 130 | |||
| 131 | inline | ||
| 132 | const_buffer_subspan | ||
| 133 | suffix_impl(std::size_t n) const noexcept; | ||
| 134 | }; | ||
| 135 | |||
| 136 | //----------------------------------------------- | ||
| 137 | |||
| 138 | } // buffers | ||
| 139 | } // boost | ||
| 140 | |||
| 141 | #include <boost/buffers/impl/const_buffer_span.hpp> | ||
| 142 | |||
| 143 | #endif | ||
| 144 |