Index/src / corosio / src / ipv4_address.cpp

src/corosio/src/ipv4_address.cpp

99.1% Lines (115/116) 100.0% List of functions (16/16) 86.4% Branches (57/66)
[ ] prev/next file n p prev/next uncovered line
ipv4_address.cpp
f(x) Functions (16)
Function Calls Lines Branches Blocks
boost::corosio::ipv4_address::ipv4_address(unsigned int) :19 21420x 100.0% – 100.0% boost::corosio::ipv4_address::ipv4_address(std::__1::array<unsigned char, 4ul> const&) :21 37864x 100.0% – 100.0% boost::corosio::ipv4_address::ipv4_address(std::__1::basic_string_view<char, std::__1::char_traits<char>>) :29 62x 100.0% 100.0% 100.0% boost::corosio::ipv4_address::to_bytes() const :38 10971x 100.0% – 100.0% boost::corosio::ipv4_address::to_uint() const :49 25x 100.0% – 100.0% boost::corosio::ipv4_address::to_string() const :55 24x 100.0% – 100.0% boost::corosio::ipv4_address::to_buffer(char*, unsigned long) const :63 8x 83.3% 75.0% 66.0% 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::__1::basic_ostream<char, std::__1::char_traits<char>>&, boost::corosio::ipv4_address const&) :90 2x 100.0% – 100.0% boost::corosio::ipv4_address::print_impl(char*) const :98 31x 100.0% – 83.0% boost::corosio::ipv4_address::print_impl(char*) const::$_0::operator()(char*&, unsigned char) const :101 124x 100.0% 66.7% 100.0% boost::corosio::(anonymous namespace)::parse_dec_octet(char const*&, char const*, unsigned char&) :131 472x 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 166x 100.0% 100.0% 100.0% boost::corosio::make_ipv4_address(std::__1::basic_string_view<char, std::__1::char_traits<char>>) :212 166x 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 21420x ipv4_address::ipv4_address(uint_type u) noexcept : addr_(u) {}
20
21 37864x ipv4_address::ipv4_address(bytes_type const& bytes) noexcept
22 18932x {
23 56796x addr_ = (static_cast<std::uint32_t>(bytes[0]) << 24) |
24 37864x (static_cast<std::uint32_t>(bytes[1]) << 16) |
25 37864x (static_cast<std::uint32_t>(bytes[2]) << 8) |
26 18932x (static_cast<std::uint32_t>(bytes[3]));
27 18932x }
28
29 62x ipv4_address::ipv4_address(std::string_view s)
30 31x {
31 31x auto [ec, addr] = make_ipv4_address(s);
32
2/2
✓ Branch 0 taken 27 times.
✓ Branch 1 taken 4 times.
 31x if (ec)
33 4x detail::throw_system_error(ec, "invalid IPv4 address");
34 27x *this = addr;
35 31x }
36
37 auto
38 10971x ipv4_address::to_bytes() const noexcept -> bytes_type
39 {
40 bytes_type bytes;
41 10971x bytes[0] = static_cast<unsigned char>((addr_ >> 24) & 0xff);
42 10971x bytes[1] = static_cast<unsigned char>((addr_ >> 16) & 0xff);
43 10971x bytes[2] = static_cast<unsigned char>((addr_ >> 8) & 0xff);
44 10971x bytes[3] = static_cast<unsigned char>(addr_ & 0xff);
45 10971x return bytes;
46 }
47
48 auto
49 25x ipv4_address::to_uint() const noexcept -> uint_type
50 {
51 25x 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 24x 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
2/2
✓ Branch 0 taken 7 times.
✓ Branch 1 taken 1 time.
 8x if (dest_size < max_str_len)
66
1/2
✓ Branch 0 taken 1 time.
✗ Branch 1 not taken.
 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 155x auto const write = [](char*& dest, unsigned char v) {
102
2/2
✓ Branch 0 taken 44 times.
✓ Branch 1 taken 80 times.
 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 44x }
109
2/2
✓ Branch 0 taken 75 times.
✓ Branch 1 taken 5 times.
 80x else if (v >= 10)
110 {
111 5x *dest++ = '0' + v / 10;
112 5x v %= 10;
113 5x }
114 124x *dest++ = '0' + v;
115 124x };
116
1/2
✓ Branch 0 taken 31 times.
✗ Branch 1 not taken.
 31x write(dest, static_cast<unsigned char>((addr_ >> 24) & 0xff));
117 31x *dest++ = '.';
118
1/2
✓ Branch 0 taken 31 times.
✗ Branch 1 not taken.
 31x write(dest, static_cast<unsigned char>((addr_ >> 16) & 0xff));
119 31x *dest++ = '.';
120
1/2
✓ Branch 0 taken 31 times.
✗ Branch 1 not taken.
 31x write(dest, static_cast<unsigned char>((addr_ >> 8) & 0xff));
121 31x *dest++ = '.';
122
1/2
✓ Branch 0 taken 31 times.
✗ Branch 1 not taken.
 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 472x parse_dec_octet(char const*& it, char const* end, unsigned char& octet) noexcept
132 {
133
2/2
✓ Branch 0 taken 468 times.
✓ Branch 1 taken 4 times.
 472x if (it == end)
134 4x return false;
135
136 468x char c = *it;
137
4/4
✓ Branch 0 taken 463 times.
✓ Branch 1 taken 5 times.
✓ Branch 2 taken 42 times.
✓ Branch 3 taken 421 times.
 468x if (c < '0' || c > '9')
138 47x return false;
139
140 421x unsigned v = static_cast<unsigned>(c - '0');
141 421x ++it;
142
143
2/2
✓ Branch 0 taken 363 times.
✓ Branch 1 taken 58 times.
 421x if (v == 0)
144 {
145 // "0" is valid, but "00", "01", etc. are not
146
5/6
✓ Branch 0 taken 56 times.
✓ Branch 1 taken 2 times.
✓ Branch 2 taken 3 times.
✓ Branch 3 taken 53 times.
✗ Branch 4 not taken.
✓ Branch 5 taken 3 times.
 58x if (it != end && *it >= '0' && *it <= '9')
147 3x return false;
148 55x octet = 0;
149 55x return true;
150 }
151
152 // First digit was 1-9, can have more
153
6/6
✓ Branch 0 taken 280 times.
✓ Branch 1 taken 83 times.
✓ Branch 2 taken 124 times.
✓ Branch 3 taken 156 times.
✓ Branch 4 taken 6 times.
✓ Branch 5 taken 118 times.
 363x if (it != end && *it >= '0' && *it <= '9')
154 {
155 118x v = v * 10 + static_cast<unsigned>(*it - '0');
156 118x ++it;
157
158
4/6
✓ Branch 0 taken 118 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 115 times.
✓ Branch 3 taken 3 times.
✗ Branch 4 not taken.
✓ Branch 5 taken 115 times.
 118x if (it != end && *it >= '0' && *it <= '9')
159 {
160 115x v = v * 10 + static_cast<unsigned>(*it - '0');
161 115x ++it;
162
163 // Can't have more than 3 digits
164
5/6
✓ Branch 0 taken 109 times.
✓ Branch 1 taken 6 times.
✓ Branch 2 taken 3 times.
✓ Branch 3 taken 106 times.
✗ Branch 4 not taken.
✓ Branch 5 taken 3 times.
 115x if (it != end && *it >= '0' && *it <= '9')
165 3x return false;
166 112x }
167 115x }
168
169
2/2
✓ Branch 0 taken 9 times.
✓ Branch 1 taken 351 times.
 360x if (v > 255)
170 9x return false;
171
172 351x octet = static_cast<unsigned char>(v);
173 351x return true;
174 472x }
175
176 } // namespace
177
178 static std::error_code
179 166x parse_ipv4_impl(std::string_view s, ipv4_address& addr) noexcept
180 {
181 166x auto it = s.data();
182 166x auto const end = it + s.size();
183
184 unsigned char octets[4];
185
186 // Parse first octet
187
2/2
✓ Branch 0 taken 57 times.
✓ Branch 1 taken 109 times.
 166x if (!parse_dec_octet(it, end, octets[0]))
188 57x return std::make_error_code(std::errc::invalid_argument);
189
190 // Parse remaining octets
191
2/2
✓ Branch 0 taken 315 times.
✓ Branch 1 taken 91 times.
 406x for (int i = 1; i < 4; ++i)
192 {
193
4/4
✓ Branch 0 taken 307 times.
✓ Branch 1 taken 8 times.
✓ Branch 2 taken 1 time.
✓ Branch 3 taken 306 times.
 315x if (it == end || *it != '.')
194 9x return std::make_error_code(std::errc::invalid_argument);
195 306x ++it; // skip '.'
196
197
2/2
✓ Branch 0 taken 9 times.
✓ Branch 1 taken 297 times.
 306x if (!parse_dec_octet(it, end, octets[i]))
198 9x return std::make_error_code(std::errc::invalid_argument);
199 297x }
200
201 // Must have consumed entire string
202
2/2
✓ Branch 0 taken 10 times.
✓ Branch 1 taken 81 times.
 91x if (it != end)
203 10x return std::make_error_code(std::errc::invalid_argument);
204
205 81x addr = ipv4_address(
206 81x ipv4_address::bytes_type{{octets[0], octets[1], octets[2], octets[3]}});
207
208 81x return {};
209 166x }
210
211 capy::io_result<ipv4_address>
212 166x make_ipv4_address(std::string_view s) noexcept
213 {
214 166x ipv4_address addr;
215
2/2
✓ Branch 0 taken 85 times.
✓ Branch 1 taken 81 times.
 166x if (auto ec = parse_ipv4_impl(s, addr))
216 85x return {ec, ipv4_address{}};
217 81x return {std::error_code{}, addr};
218 166x }
219
220 } // namespace boost::corosio
221