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src/corosio/src/ipv4_address.cpp

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ipv4_address.cpp
f(x) Functions (16)
Function Calls Lines Blocks
boost::corosio::ipv4_address::ipv4_address(unsigned int) :19 5348x 100.0% 100.0% boost::corosio::ipv4_address::ipv4_address(std::array<unsigned char, 4ul> const&) :21 9934x 100.0% 100.0% boost::corosio::ipv4_address::ipv4_address(std::basic_string_view<char, std::char_traits<char> >) :29 31x 100.0% 100.0% boost::corosio::ipv4_address::to_bytes() const :38 5605x 100.0% 100.0% boost::corosio::ipv4_address::to_uint() const :49 30x 100.0% 100.0% boost::corosio::ipv4_address::to_string[abi:cxx11]() const :55 24x 100.0% 73.0% boost::corosio::ipv4_address::to_buffer(char*, unsigned long) const :63 8x 100.0% 91.0% boost::corosio::ipv4_address::is_loopback() const :72 9x 100.0% 100.0% boost::corosio::ipv4_address::is_unspecified() const :78 8x 100.0% 100.0% boost::corosio::ipv4_address::is_multicast() const :84 6x 100.0% 100.0% boost::corosio::operator<<(std::ostream&, boost::corosio::ipv4_address const&) :90 2x 100.0% 100.0% boost::corosio::ipv4_address::print_impl(char*) const :98 31x 100.0% 100.0% boost::corosio::ipv4_address::print_impl(char*) const::{lambda(char*&, unsigned char)#1}::operator()(char*&, unsigned char) const :101 124x 100.0% 100.0% boost::corosio::(anonymous namespace)::parse_dec_octet(char const*&, char const*, unsigned char&) :131 451x 100.0% 100.0% boost::corosio::parse_ipv4_impl(std::basic_string_view<char, std::char_traits<char> >, boost::corosio::ipv4_address&) :179 151x 100.0% 100.0% boost::corosio::make_ipv4_address(std::basic_string_view<char, std::char_traits<char> >) :212 151x 100.0% 100.0%
Line TLA Hits Source Code
1 //
2 // Copyright (c) 2026 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/corosio
8 //
9
10 #include <boost/corosio/ipv4_address.hpp>
11
12 #include <boost/corosio/detail/except.hpp>
13
14 #include <ostream>
15 #include <stdexcept>
16
17 namespace boost::corosio {
18
19 5348x ipv4_address::ipv4_address(uint_type u) noexcept : addr_(u) {}
20
21 9934x ipv4_address::ipv4_address(bytes_type const& bytes) noexcept
22 {
23 9934x addr_ = (static_cast<std::uint32_t>(bytes[0]) << 24) |
24 9934x (static_cast<std::uint32_t>(bytes[1]) << 16) |
25 9934x (static_cast<std::uint32_t>(bytes[2]) << 8) |
26 9934x (static_cast<std::uint32_t>(bytes[3]));
27 9934x }
28
29 31x ipv4_address::ipv4_address(std::string_view s)
30 {
31 31x auto [ec, addr] = make_ipv4_address(s);
32 31x if (ec)
33 4x detail::throw_system_error(ec, "invalid IPv4 address");
34 27x *this = addr;
35 27x }
36
37 auto
38 5605x ipv4_address::to_bytes() const noexcept -> bytes_type
39 {
40 bytes_type bytes;
41 5605x bytes[0] = static_cast<unsigned char>((addr_ >> 24) & 0xff);
42 5605x bytes[1] = static_cast<unsigned char>((addr_ >> 16) & 0xff);
43 5605x bytes[2] = static_cast<unsigned char>((addr_ >> 8) & 0xff);
44 5605x bytes[3] = static_cast<unsigned char>(addr_ & 0xff);
45 5605x return bytes;
46 }
47
48 auto
49 30x ipv4_address::to_uint() const noexcept -> uint_type
50 {
51 30x return addr_;
52 }
53
54 std::string
55 24x ipv4_address::to_string() const
56 {
57 char buf[max_str_len];
58 24x auto n = print_impl(buf);
59 48x return std::string(buf, n);
60 }
61
62 std::string_view
63 8x ipv4_address::to_buffer(char* dest, std::size_t dest_size) const
64 {
65 8x if (dest_size < max_str_len)
66 1x throw std::length_error("buffer too small for IPv4 address");
67 7x auto n = print_impl(dest);
68 7x return std::string_view(dest, n);
69 }
70
71 bool
72 9x ipv4_address::is_loopback() const noexcept
73 {
74 9x return (addr_ & 0xFF000000) == 0x7F000000;
75 }
76
77 bool
78 8x ipv4_address::is_unspecified() const noexcept
79 {
80 8x return addr_ == 0;
81 }
82
83 bool
84 6x ipv4_address::is_multicast() const noexcept
85 {
86 6x return (addr_ & 0xF0000000) == 0xE0000000;
87 }
88
89 std::ostream&
90 2x operator<<(std::ostream& os, ipv4_address const& addr)
91 {
92 char buf[ipv4_address::max_str_len];
93 2x os << addr.to_buffer(buf, sizeof(buf));
94 2x return os;
95 }
96
97 std::size_t
98 31x ipv4_address::print_impl(char* dest) const noexcept
99 {
100 31x auto const start = dest;
101 124x auto const write = [](char*& dest, unsigned char v) {
102 124x if (v >= 100)
103 {
104 44x *dest++ = '0' + v / 100;
105 44x v %= 100;
106 44x *dest++ = '0' + v / 10;
107 44x v %= 10;
108 }
109 80x else if (v >= 10)
110 {
111 5x *dest++ = '0' + v / 10;
112 5x v %= 10;
113 }
114 124x *dest++ = '0' + v;
115 124x };
116 31x write(dest, static_cast<unsigned char>((addr_ >> 24) & 0xff));
117 31x *dest++ = '.';
118 31x write(dest, static_cast<unsigned char>((addr_ >> 16) & 0xff));
119 31x *dest++ = '.';
120 31x write(dest, static_cast<unsigned char>((addr_ >> 8) & 0xff));
121 31x *dest++ = '.';
122 31x write(dest, static_cast<unsigned char>(addr_ & 0xff));
123 31x return static_cast<std::size_t>(dest - start);
124 }
125
126 namespace {
127
128 // Parse a decimal octet (0-255), no leading zeros except "0"
129 // Returns true on success, advances `it`
130 bool
131 451x parse_dec_octet(char const*& it, char const* end, unsigned char& octet) noexcept
132 {
133 451x if (it == end)
134 4x return false;
135
136 447x char c = *it;
137 447x if (c < '0' || c > '9')
138 34x return false;
139
140 413x unsigned v = static_cast<unsigned>(c - '0');
141 413x ++it;
142
143 413x if (v == 0)
144 {
145 // "0" is valid, but "00", "01", etc. are not
146 55x if (it != end && *it >= '0' && *it <= '9')
147 3x return false;
148 52x octet = 0;
149 52x return true;
150 }
151
152 // First digit was 1-9, can have more
153 358x if (it != end && *it >= '0' && *it <= '9')
154 {
155 116x v = v * 10 + static_cast<unsigned>(*it - '0');
156 116x ++it;
157
158 116x if (it != end && *it >= '0' && *it <= '9')
159 {
160 113x v = v * 10 + static_cast<unsigned>(*it - '0');
161 113x ++it;
162
163 // Can't have more than 3 digits
164 113x if (it != end && *it >= '0' && *it <= '9')
165 3x return false;
166 }
167 }
168
169 355x if (v > 255)
170 9x return false;
171
172 346x octet = static_cast<unsigned char>(v);
173 346x return true;
174 }
175
176 } // namespace
177
178 static std::error_code
179 151x parse_ipv4_impl(std::string_view s, ipv4_address& addr) noexcept
180 {
181 151x auto it = s.data();
182 151x auto const end = it + s.size();
183
184 unsigned char octets[4];
185
186 // Parse first octet
187 151x if (!parse_dec_octet(it, end, octets[0]))
188 44x return std::make_error_code(std::errc::invalid_argument);
189
190 // Parse remaining octets
191 398x for (int i = 1; i < 4; ++i)
192 {
193 309x if (it == end || *it != '.')
194 9x return std::make_error_code(std::errc::invalid_argument);
195 300x ++it; // skip '.'
196
197 300x if (!parse_dec_octet(it, end, octets[i]))
198 9x return std::make_error_code(std::errc::invalid_argument);
199 }
200
201 // Must have consumed entire string
202 89x if (it != end)
203 10x return std::make_error_code(std::errc::invalid_argument);
204
205 158x addr = ipv4_address(
206 79x ipv4_address::bytes_type{{octets[0], octets[1], octets[2], octets[3]}});
207
208 79x return {};
209 }
210
211 capy::io_result<ipv4_address>
212 151x make_ipv4_address(std::string_view s) noexcept
213 {
214 151x ipv4_address addr;
215 151x if (auto ec = parse_ipv4_impl(s, addr))
216 72x return {ec, ipv4_address{}};
217 79x return {std::error_code{}, addr};
218 }
219
220 } // namespace boost::corosio
221