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 Branches Blocks
boost::corosio::ipv4_address::ipv4_address(unsigned int) :19 19280x 100.0% – 100.0% boost::corosio::ipv4_address::ipv4_address(std::__1::array<unsigned char, 4ul> const&) :21 34534x 100.0% – 100.0% boost::corosio::ipv4_address::ipv4_address(std::__1::basic_string_view<char, std::__1::char_traits<char>>) :29 58x 100.0% 100.0% 100.0% boost::corosio::ipv4_address::to_bytes() const :38 9722x 100.0% – 100.0% boost::corosio::ipv4_address::to_uint() const :49 36x 100.0% – 100.0% boost::corosio::ipv4_address::to_string() const :55 20x 100.0% – 100.0% boost::corosio::ipv4_address::to_buffer(char*, unsigned long) const :63 5x 83.3% 75.0% 66.0% 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::__1::basic_ostream<char, std::__1::char_traits<char>>&, boost::corosio::ipv4_address const&) :90 1x 100.0% – 100.0% boost::corosio::ipv4_address::print_impl(char*) const :98 24x 100.0% – 83.0% boost::corosio::ipv4_address::print_impl(char*) const::$_0::operator()(char*&, unsigned char) const :101 96x 100.0% 66.7% 100.0% boost::corosio::(anonymous namespace)::parse_dec_octet(char const*&, char const*, unsigned char&) :131 346x 100.0% 88.2% 100.0% boost::corosio::parse_ipv4_impl(std::__1::basic_string_view<char, std::__1::char_traits<char>>, boost::corosio::ipv4_address&) :179 111x 100.0% 91.7% 100.0% boost::corosio::make_ipv4_address(std::__1::basic_string_view<char, std::__1::char_traits<char>>) :212 111x 100.0% 100.0% 100.0%
Line Branch TLA Hits Source Code
1 //
2 // Copyright (c) 2026 Vinnie Falco ([email protected])
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 19280x ipv4_address::ipv4_address(uint_type u) noexcept : addr_(u) {}
20
21 34534x ipv4_address::ipv4_address(bytes_type const& bytes) noexcept
22 17267x {
23 51801x addr_ = (static_cast<std::uint32_t>(bytes[0]) << 24) |
24 34534x (static_cast<std::uint32_t>(bytes[1]) << 16) |
25 34534x (static_cast<std::uint32_t>(bytes[2]) << 8) |
26 17267x (static_cast<std::uint32_t>(bytes[3]));
27 17267x }
28
29 58x ipv4_address::ipv4_address(std::string_view s)
30 29x {
31 29x auto [ec, addr] = make_ipv4_address(s);
32
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 29x if (ec)
33 4x detail::throw_system_error(ec, "invalid IPv4 address");
34 25x *this = addr;
35 29x }
36
37 auto
38 9722x ipv4_address::to_bytes() const noexcept -> bytes_type
39 {
40 bytes_type bytes;
41 9722x bytes[0] = static_cast<unsigned char>((addr_ >> 24) & 0xff);
42 9722x bytes[1] = static_cast<unsigned char>((addr_ >> 16) & 0xff);
43 9722x bytes[2] = static_cast<unsigned char>((addr_ >> 8) & 0xff);
44 9722x bytes[3] = static_cast<unsigned char>(addr_ & 0xff);
45 9722x 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 20x 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
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 5x if (dest_size < max_str_len)
66
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 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 120x auto const write = [](char*& dest, unsigned char v) {
102
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 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 32x }
109
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 64x else if (v >= 10)
110 {
111 5x *dest++ = '0' + v / 10;
112 5x v %= 10;
113 5x }
114 96x *dest++ = '0' + v;
115 96x };
116
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 24x write(dest, static_cast<unsigned char>((addr_ >> 24) & 0xff));
117 24x *dest++ = '.';
118
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 24x write(dest, static_cast<unsigned char>((addr_ >> 16) & 0xff));
119 24x *dest++ = '.';
120
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 24x write(dest, static_cast<unsigned char>((addr_ >> 8) & 0xff));
121 24x *dest++ = '.';
122
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 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 346x parse_dec_octet(char const*& it, char const* end, unsigned char& octet) noexcept
132 {
133
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 346x if (it == end)
134 2x return false;
135
136 344x char c = *it;
137
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 344x if (c < '0' || c > '9')
138 20x return false;
139
140 324x unsigned v = static_cast<unsigned>(c - '0');
141 324x ++it;
142
143
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 324x if (v == 0)
144 {
145 // "0" is valid, but "00", "01", etc. are not
146
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 50x if (it != end && *it >= '0' && *it <= '9')
147 3x return false;
148 47x octet = 0;
149 47x return true;
150 }
151
152 // First digit was 1-9, can have more
153
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 274x if (it != end && *it >= '0' && *it <= '9')
154 {
155 80x v = v * 10 + static_cast<unsigned>(*it - '0');
156 80x ++it;
157
158
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 80x if (it != end && *it >= '0' && *it <= '9')
159 {
160 77x v = v * 10 + static_cast<unsigned>(*it - '0');
161 77x ++it;
162
163 // Can't have more than 3 digits
164
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 77x if (it != end && *it >= '0' && *it <= '9')
165 1x return false;
166 76x }
167 79x }
168
169
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 273x if (v > 255)
170 9x return false;
171
172 264x octet = static_cast<unsigned char>(v);
173 264x return true;
174 346x }
175
176 } // namespace
177
178 static std::error_code
179 111x parse_ipv4_impl(std::string_view s, ipv4_address& addr) noexcept
180 {
181 111x auto it = s.data();
182 111x auto const end = it + s.size();
183
184 unsigned char octets[4];
185
186 // Parse first octet
187
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 111x if (!parse_dec_octet(it, end, octets[0]))
188 27x return std::make_error_code(std::errc::invalid_argument);
189
190 // Parse remaining octets
191
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 311x for (int i = 1; i < 4; ++i)
192 {
193
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 242x if (it == end || *it != '.')
194 7x return std::make_error_code(std::errc::invalid_argument);
195 235x ++it; // skip '.'
196
197
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 235x if (!parse_dec_octet(it, end, octets[i]))
198 8x return std::make_error_code(std::errc::invalid_argument);
199 227x }
200
201 // Must have consumed entire string
202
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 69x if (it != end)
203 7x return std::make_error_code(std::errc::invalid_argument);
204
205 62x addr = ipv4_address(
206 62x ipv4_address::bytes_type{{octets[0], octets[1], octets[2], octets[3]}});
207
208 62x return {};
209 111x }
210
211 capy::io_result<ipv4_address>
212 111x make_ipv4_address(std::string_view s) noexcept
213 {
214 111x ipv4_address addr;
215
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 111x if (auto ec = parse_ipv4_impl(s, addr))
216 49x return {ec, ipv4_address{}};
217 62x return {std::error_code{}, addr};
218 111x }
219
220 } // namespace boost::corosio
221