| 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_MUTABLE_BUFFER_SPAN_HPP | ||
| 11 | #define BOOST_BUFFERS_MUTABLE_BUFFER_SPAN_HPP | ||
| 12 | |||
| 13 | #include <boost/buffers/detail/config.hpp> | ||
| 14 | #include <boost/buffers/mutable_buffer.hpp> | ||
| 15 | #include <boost/buffers/mutable_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 are modifiable. | ||
| 22 | |||
| 23 | Objects of this type meet the requirements | ||
| 24 | of <em>MutableBufferSequence</em>. | ||
| 25 | */ | ||
| 26 | class mutable_buffer_span | ||
| 27 | { | ||
| 28 | mutable_buffer const* p_ = nullptr; | ||
| 29 | std::size_t n_ = 0; | ||
| 30 | |||
| 31 | friend class mutable_buffer_subspan; | ||
| 32 | |||
| 33 | public: | ||
| 34 | /** The type of buffer. | ||
| 35 | */ | ||
| 36 | using value_type = mutable_buffer; | ||
| 37 | |||
| 38 | /** The type of iterators returned. | ||
| 39 | */ | ||
| 40 | using const_iterator = value_type const*; | ||
| 41 | |||
| 42 | /** Constructor. | ||
| 43 | */ | ||
| 44 | mutable_buffer_span() = default; | ||
| 45 | |||
| 46 | /** Constructor. | ||
| 47 | */ | ||
| 48 | 16150 | mutable_buffer_span( | |
| 49 | mutable_buffer const* p, | ||
| 50 | std::size_t n) noexcept | ||
| 51 | 16150 | : p_(p) | |
| 52 | 16150 | , n_(n) | |
| 53 | { | ||
| 54 | 16150 | } | |
| 55 | |||
| 56 | /** Constructor. | ||
| 57 | */ | ||
| 58 | template< | ||
| 59 | class MutableBufferSequence | ||
| 60 | , class = typename std::enable_if< | ||
| 61 | ! std::is_same< | ||
| 62 | MutableBufferSequence, | ||
| 63 | mutable_buffer_span>::value && | ||
| 64 | is_mutable_buffer_sequence< | ||
| 65 | MutableBufferSequence>::value && | ||
| 66 | std::is_same<decltype( | ||
| 67 | std::declval<MutableBufferSequence | ||
| 68 | const&>().begin()), | ||
| 69 | mutable_buffer const*>::value | ||
| 70 | >::type | ||
| 71 | > | ||
| 72 | explicit | ||
| 73 | 1 | mutable_buffer_span( | |
| 74 | MutableBufferSequence const& bs) noexcept | ||
| 75 | 1 | : p_(bs.begin()) | |
| 76 | 1 | , n_(bs.end() - bs.begin()) | |
| 77 | { | ||
| 78 | 1 | } | |
| 79 | |||
| 80 | /** Constructor. | ||
| 81 | */ | ||
| 82 | inline | ||
| 83 | mutable_buffer_span( | ||
| 84 | mutable_buffer_span const&) = default; | ||
| 85 | |||
| 86 | /** Assignment. | ||
| 87 | */ | ||
| 88 | mutable_buffer_span& operator=( | ||
| 89 | mutable_buffer_span const&) = default; | ||
| 90 | |||
| 91 | /** Return an iterator to the beginning. | ||
| 92 | */ | ||
| 93 | const_iterator | ||
| 94 | 13100 | begin() const noexcept | |
| 95 | { | ||
| 96 | 13100 | return p_; | |
| 97 | } | ||
| 98 | |||
| 99 | /** Return an iterator to the end. | ||
| 100 | */ | ||
| 101 | const_iterator | ||
| 102 | 13100 | end() const noexcept | |
| 103 | { | ||
| 104 | 13100 | return p_ + n_; | |
| 105 | } | ||
| 106 | |||
| 107 | friend | ||
| 108 | mutable_buffer_subspan | ||
| 109 | 374 | tag_invoke( | |
| 110 | prefix_tag const&, | ||
| 111 | mutable_buffer_span const& s, | ||
| 112 | std::size_t n) noexcept | ||
| 113 | { | ||
| 114 | 374 | return s.prefix_impl(n); | |
| 115 | } | ||
| 116 | |||
| 117 | friend | ||
| 118 | mutable_buffer_subspan | ||
| 119 | 374 | tag_invoke( | |
| 120 | suffix_tag const&, | ||
| 121 | mutable_buffer_span const& s, | ||
| 122 | std::size_t n) noexcept | ||
| 123 | { | ||
| 124 | 374 | return s.suffix_impl(n); | |
| 125 | } | ||
| 126 | |||
| 127 | private: | ||
| 128 | inline | ||
| 129 | mutable_buffer_subspan | ||
| 130 | prefix_impl(std::size_t n) const noexcept; | ||
| 131 | |||
| 132 | inline | ||
| 133 | mutable_buffer_subspan | ||
| 134 | suffix_impl(std::size_t n) const noexcept; | ||
| 135 | }; | ||
| 136 | |||
| 137 | } // buffers | ||
| 138 | } // boost | ||
| 139 | |||
| 140 | #include <boost/buffers/impl/mutable_buffer_span.hpp> | ||
| 141 | |||
| 142 | #endif | ||
| 143 |