Index/src / corosio / src / ipv4_address.cpp

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 7579x 100.0% 100.0% boost::corosio::ipv4_address::ipv4_address(std::array<unsigned char, 4ul> const&) :21 14680x 100.0% 100.0% boost::corosio::ipv4_address::ipv4_address(std::basic_string_view<char, std::char_traits<char> >) :29 29x 100.0% 100.0% boost::corosio::ipv4_address::to_bytes() const :38 7659x 100.0% 100.0% boost::corosio::ipv4_address::to_uint() const :49 36x 100.0% 100.0% boost::corosio::ipv4_address::to_string[abi:cxx11]() const :55 20x 100.0% 73.0% boost::corosio::ipv4_address::to_buffer(char*, unsigned long) const :63 5x 100.0% 91.0% boost::corosio::ipv4_address::is_loopback() const :72 5x 100.0% 100.0% boost::corosio::ipv4_address::is_unspecified() const :78 4x 100.0% 100.0% boost::corosio::ipv4_address::is_multicast() const :84 4x 100.0% 100.0% boost::corosio::operator<<(std::ostream&, boost::corosio::ipv4_address const&) :90 1x 100.0% 100.0% boost::corosio::ipv4_address::print_impl(char*) const :98 24x 100.0% 100.0% boost::corosio::ipv4_address::print_impl(char*) const::{lambda(char*&, unsigned char)#1}::operator()(char*&, unsigned char) const :101 96x 100.0% 100.0% boost::corosio::(anonymous namespace)::parse_dec_octet(char const*&, char const*, unsigned char&) :131 327x 100.0% 100.0% boost::corosio::parse_ipv4_impl(std::basic_string_view<char, std::char_traits<char> >, boost::corosio::ipv4_address&) :179 98x 100.0% 100.0% boost::corosio::make_ipv4_address(std::basic_string_view<char, std::char_traits<char> >) :212 98x 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 7579x ipv4_address::ipv4_address(uint_type u) noexcept : addr_(u) {}
20
21 14680x ipv4_address::ipv4_address(bytes_type const& bytes) noexcept
22 {
23 14680x addr_ = (static_cast<std::uint32_t>(bytes[0]) << 24) |
24 14680x (static_cast<std::uint32_t>(bytes[1]) << 16) |
25 14680x (static_cast<std::uint32_t>(bytes[2]) << 8) |
26 14680x (static_cast<std::uint32_t>(bytes[3]));
27 14680x }
28
29 29x ipv4_address::ipv4_address(std::string_view s)
30 {
31 29x auto [ec, addr] = make_ipv4_address(s);
32 29x if (ec)
33 4x detail::throw_system_error(ec, "invalid IPv4 address");
34 25x *this = addr;
35 25x }
36
37 auto
38 7659x ipv4_address::to_bytes() const noexcept -> bytes_type
39 {
40 bytes_type bytes;
41 7659x bytes[0] = static_cast<unsigned char>((addr_ >> 24) & 0xff);
42 7659x bytes[1] = static_cast<unsigned char>((addr_ >> 16) & 0xff);
43 7659x bytes[2] = static_cast<unsigned char>((addr_ >> 8) & 0xff);
44 7659x bytes[3] = static_cast<unsigned char>(addr_ & 0xff);
45 7659x return bytes;
46 }
47
48 auto
49 36x ipv4_address::to_uint() const noexcept -> uint_type
50 {
51 36x return addr_;
52 }
53
54 std::string
55 20x ipv4_address::to_string() const
56 {
57 char buf[max_str_len];
58 20x auto n = print_impl(buf);
59 40x return std::string(buf, n);
60 }
61
62 std::string_view
63 5x ipv4_address::to_buffer(char* dest, std::size_t dest_size) const
64 {
65 5x if (dest_size < max_str_len)
66 1x throw std::length_error("buffer too small for IPv4 address");
67 4x auto n = print_impl(dest);
68 4x return std::string_view(dest, n);
69 }
70
71 bool
72 5x ipv4_address::is_loopback() const noexcept
73 {
74 5x return (addr_ & 0xFF000000) == 0x7F000000;
75 }
76
77 bool
78 4x ipv4_address::is_unspecified() const noexcept
79 {
80 4x return addr_ == 0;
81 }
82
83 bool
84 4x ipv4_address::is_multicast() const noexcept
85 {
86 4x return (addr_ & 0xF0000000) == 0xE0000000;
87 }
88
89 std::ostream&
90 1x operator<<(std::ostream& os, ipv4_address const& addr)
91 {
92 char buf[ipv4_address::max_str_len];
93 1x os << addr.to_buffer(buf, sizeof(buf));
94 1x return os;
95 }
96
97 std::size_t
98 24x ipv4_address::print_impl(char* dest) const noexcept
99 {
100 24x auto const start = dest;
101 96x auto const write = [](char*& dest, unsigned char v) {
102 96x if (v >= 100)
103 {
104 32x *dest++ = '0' + v / 100;
105 32x v %= 100;
106 32x *dest++ = '0' + v / 10;
107 32x v %= 10;
108 }
109 64x else if (v >= 10)
110 {
111 5x *dest++ = '0' + v / 10;
112 5x v %= 10;
113 }
114 96x *dest++ = '0' + v;
115 96x };
116 24x write(dest, static_cast<unsigned char>((addr_ >> 24) & 0xff));
117 24x *dest++ = '.';
118 24x write(dest, static_cast<unsigned char>((addr_ >> 16) & 0xff));
119 24x *dest++ = '.';
120 24x write(dest, static_cast<unsigned char>((addr_ >> 8) & 0xff));
121 24x *dest++ = '.';
122 24x write(dest, static_cast<unsigned char>(addr_ & 0xff));
123 24x 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 327x parse_dec_octet(char const*& it, char const* end, unsigned char& octet) noexcept
132 {
133 327x if (it == end)
134 2x return false;
135
136 325x char c = *it;
137 325x if (c < '0' || c > '9')
138 9x return false;
139
140 316x unsigned v = static_cast<unsigned>(c - '0');
141 316x ++it;
142
143 316x if (v == 0)
144 {
145 // "0" is valid, but "00", "01", etc. are not
146 47x if (it != end && *it >= '0' && *it <= '9')
147 3x return false;
148 44x octet = 0;
149 44x return true;
150 }
151
152 // First digit was 1-9, can have more
153 269x if (it != end && *it >= '0' && *it <= '9')
154 {
155 78x v = v * 10 + static_cast<unsigned>(*it - '0');
156 78x ++it;
157
158 78x if (it != end && *it >= '0' && *it <= '9')
159 {
160 75x v = v * 10 + static_cast<unsigned>(*it - '0');
161 75x ++it;
162
163 // Can't have more than 3 digits
164 75x if (it != end && *it >= '0' && *it <= '9')
165 1x return false;
166 }
167 }
168
169 268x if (v > 255)
170 9x return false;
171
172 259x octet = static_cast<unsigned char>(v);
173 259x return true;
174 }
175
176 } // namespace
177
178 static std::error_code
179 98x parse_ipv4_impl(std::string_view s, ipv4_address& addr) noexcept
180 {
181 98x auto it = s.data();
182 98x auto const end = it + s.size();
183
184 unsigned char octets[4];
185
186 // Parse first octet
187 98x if (!parse_dec_octet(it, end, octets[0]))
188 16x return std::make_error_code(std::errc::invalid_argument);
189
190 // Parse remaining octets
191 303x for (int i = 1; i < 4; ++i)
192 {
193 236x if (it == end || *it != '.')
194 7x return std::make_error_code(std::errc::invalid_argument);
195 229x ++it; // skip '.'
196
197 229x if (!parse_dec_octet(it, end, octets[i]))
198 8x return std::make_error_code(std::errc::invalid_argument);
199 }
200
201 // Must have consumed entire string
202 67x if (it != end)
203 7x return std::make_error_code(std::errc::invalid_argument);
204
205 120x addr = ipv4_address(
206 60x ipv4_address::bytes_type{{octets[0], octets[1], octets[2], octets[3]}});
207
208 60x return {};
209 }
210
211 capy::io_result<ipv4_address>
212 98x make_ipv4_address(std::string_view s) noexcept
213 {
214 98x ipv4_address addr;
215 98x if (auto ec = parse_ipv4_impl(s, addr))
216 38x return {ec, ipv4_address{}};
217 60x return {std::error_code{}, addr};
218 }
219
220 } // namespace boost::corosio
221