| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2019 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/http_proto | ||
| 8 | // | ||
| 9 | |||
| 10 | #ifndef BOOST_HTTP_PROTO_DETAIL_IMPL_CIRCULAR_BUFFER_IPP | ||
| 11 | #define BOOST_HTTP_PROTO_DETAIL_IMPL_CIRCULAR_BUFFER_IPP | ||
| 12 | |||
| 13 | #include <boost/http_proto/detail/circular_buffer.hpp> | ||
| 14 | #include <boost/assert.hpp> | ||
| 15 | |||
| 16 | namespace boost { | ||
| 17 | namespace http_proto { | ||
| 18 | namespace detail { | ||
| 19 | |||
| 20 | ✗ | circular_buffer:: | |
| 21 | circular_buffer( | ||
| 22 | void* base, | ||
| 23 | ✗ | std::size_t capacity) noexcept | |
| 24 | : base_(reinterpret_cast< | ||
| 25 | unsigned char*>(base)) | ||
| 26 | ✗ | , cap_(capacity) | |
| 27 | { | ||
| 28 | } | ||
| 29 | |||
| 30 | bool | ||
| 31 | ✗ | circular_buffer:: | |
| 32 | empty() const noexcept | ||
| 33 | { | ||
| 34 | ✗ | return in_len_ == 0; | |
| 35 | } | ||
| 36 | |||
| 37 | auto | ||
| 38 | ✗ | circular_buffer:: | |
| 39 | data() const noexcept -> | ||
| 40 | buffers | ||
| 41 | { | ||
| 42 | ✗ | if(in_pos_ + in_len_ <= cap_) | |
| 43 | return { | ||
| 44 | mutable_buffer{ | ||
| 45 | ✗ | base_ + in_pos_, in_len_ }, | |
| 46 | ✗ | mutable_buffer{ base_, 0} }; | |
| 47 | return { | ||
| 48 | mutable_buffer{ | ||
| 49 | ✗ | base_ + in_pos_, cap_ - in_pos_}, | |
| 50 | mutable_buffer{ | ||
| 51 | ✗ | base_, in_len_- (cap_ - in_pos_)}}; | |
| 52 | } | ||
| 53 | |||
| 54 | auto | ||
| 55 | ✗ | circular_buffer:: | |
| 56 | prepare() noexcept -> | ||
| 57 | buffers | ||
| 58 | { | ||
| 59 | ✗ | auto const n = cap_ - in_len_; | |
| 60 | ✗ | auto const out_pos = | |
| 61 | ✗ | (in_pos_ + in_len_) % cap_; | |
| 62 | ✗ | if(out_pos + n <= cap_) | |
| 63 | return { | ||
| 64 | mutable_buffer{ | ||
| 65 | ✗ | base_ + out_pos, n}, | |
| 66 | ✗ | mutable_buffer{base_, | |
| 67 | ✗ | n - (cap_ - out_pos)} }; | |
| 68 | return { | ||
| 69 | mutable_buffer{ | ||
| 70 | ✗ | base_ + out_pos, cap_ - out_pos}, | |
| 71 | mutable_buffer{ | ||
| 72 | ✗ | base_, n - (cap_ - out_pos)}}; | |
| 73 | } | ||
| 74 | |||
| 75 | void | ||
| 76 | ✗ | circular_buffer:: | |
| 77 | commit(std::size_t n) noexcept | ||
| 78 | { | ||
| 79 | ✗ | BOOST_ASSERT(n <= cap_ - in_len_); | |
| 80 | ✗ | in_len_ += n; | |
| 81 | } | ||
| 82 | |||
| 83 | void | ||
| 84 | ✗ | circular_buffer:: | |
| 85 | consume(std::size_t n) noexcept | ||
| 86 | { | ||
| 87 | ✗ | if(n < in_len_) | |
| 88 | { | ||
| 89 | ✗ | in_pos_ = (in_pos_ + n) % cap_; | |
| 90 | ✗ | in_len_ -= n; | |
| 91 | } | ||
| 92 | else | ||
| 93 | { | ||
| 94 | // make prepare return a | ||
| 95 | // bigger single buffer | ||
| 96 | ✗ | in_pos_ = 0; | |
| 97 | ✗ | in_len_ = 0; | |
| 98 | } | ||
| 99 | } | ||
| 100 | |||
| 101 | } // detail | ||
| 102 | } // http_proto | ||
| 103 | } // boost | ||
| 104 | |||
| 105 | #endif | ||
| 106 |