| 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_NUMBER_STRING_HPP | ||
| 11 | #define BOOST_HTTP_PROTO_DETAIL_NUMBER_STRING_HPP | ||
| 12 | |||
| 13 | #include <boost/http_proto/detail/config.hpp> | ||
| 14 | #include <boost/core/detail/string_view.hpp> | ||
| 15 | #include <cstdint> | ||
| 16 | |||
| 17 | namespace boost { | ||
| 18 | namespace http_proto { | ||
| 19 | namespace detail { | ||
| 20 | |||
| 21 | // Convert integer to decimal | ||
| 22 | // string using in-place storage | ||
| 23 | class number_string | ||
| 24 | { | ||
| 25 | static constexpr unsigned buf_size = 18; | ||
| 26 | char buf_[buf_size + 1]; | ||
| 27 | std::size_t size_ = 0; | ||
| 28 | |||
| 29 | void | ||
| 30 | 26 | construct_unsigned( | |
| 31 | std::uint64_t n) noexcept | ||
| 32 | { | ||
| 33 | 26 | buf_[buf_size] = '\0'; | |
| 34 | 26 | auto const end = | |
| 35 | &buf_[buf_size]; | ||
| 36 | 26 | auto p = end; | |
| 37 |
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26 | if(n == 0) |
| 38 | { | ||
| 39 | 8 | *--p = '0'; | |
| 40 | } | ||
| 41 | else | ||
| 42 | { | ||
| 43 |
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96 | while(n > 0) |
| 44 | { | ||
| 45 | 78 | *--p = '0' + (n%10); | |
| 46 | 78 | n /= 10; | |
| 47 | } | ||
| 48 | } | ||
| 49 | 26 | size_ = end - p; | |
| 50 | 26 | } | |
| 51 | |||
| 52 | public: | ||
| 53 | number_string() = default; | ||
| 54 | number_string( | ||
| 55 | number_string const&) = default; | ||
| 56 | number_string& operator= | ||
| 57 | (number_string const&) = default; | ||
| 58 | |||
| 59 | explicit | ||
| 60 | 26 | number_string( | |
| 61 | std::uint64_t n) noexcept | ||
| 62 | 26 | { | |
| 63 | 26 | construct_unsigned(n); | |
| 64 | 26 | } | |
| 65 | |||
| 66 | char const* | ||
| 67 | 26 | data() const noexcept | |
| 68 | { | ||
| 69 | 26 | return &buf_[ | |
| 70 | 26 | buf_size] - size_; | |
| 71 | } | ||
| 72 | |||
| 73 | std::size_t | ||
| 74 | 26 | size() const noexcept | |
| 75 | { | ||
| 76 | 26 | return size_; | |
| 77 | } | ||
| 78 | |||
| 79 | core::string_view | ||
| 80 | 26 | str() const noexcept | |
| 81 | { | ||
| 82 | 26 | return core::string_view( | |
| 83 | 26 | data(), size()); | |
| 84 | } | ||
| 85 | |||
| 86 | 26 | operator | |
| 87 | core::string_view() const noexcept | ||
| 88 | { | ||
| 89 | 26 | return str(); | |
| 90 | } | ||
| 91 | }; | ||
| 92 | |||
| 93 | } // detail | ||
| 94 | } // http_proto | ||
| 95 | } // boost | ||
| 96 | |||
| 97 | #endif | ||
| 98 |