Index/src / corosio / src / ipv4_address.cpp

src/corosio/src/ipv4_address.cpp

98.2% Lines (107/109) 100.0% List of functions (15/15) 80.3% Branches (53/66)
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f(x) Functions (15)
Function Calls Lines Branches Blocks
boost::corosio::ipv4_address::ipv4_address(unsigned int) :17 17358x 100.0% – 100.0% boost::corosio::ipv4_address::ipv4_address(std::__1::array<unsigned char, 4ul> const&) :19 32306x 100.0% – 100.0% boost::corosio::ipv4_address::ipv4_address(std::__1::basic_string_view<char, std::__1::char_traits<char>>) :27 20x 100.0% 75.0% 100.0% boost::corosio::ipv4_address::to_bytes() const :35 8716x 100.0% – 100.0% boost::corosio::ipv4_address::to_uint() const :46 10x 100.0% – 100.0% boost::corosio::ipv4_address::to_string() const :52 11x 100.0% – 100.0% boost::corosio::ipv4_address::to_buffer(char*, unsigned long) const :60 4x 66.7% 25.0% 33.0% boost::corosio::ipv4_address::is_loopback() const :69 5x 100.0% – 100.0% boost::corosio::ipv4_address::is_unspecified() const :75 4x 100.0% – 100.0% boost::corosio::ipv4_address::is_multicast() const :81 4x 100.0% – 100.0% boost::corosio::operator<<(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, boost::corosio::ipv4_address const&) :87 1x 100.0% – 100.0% boost::corosio::ipv4_address::print_impl(char*) const :95 15x 100.0% – 83.0% boost::corosio::ipv4_address::print_impl(char*) const::$_0::operator()(char*&, unsigned char) const :98 60x 100.0% 66.7% 100.0% boost::corosio::(anonymous namespace)::parse_dec_octet(char const*&, char const*, unsigned char&) :128 217x 100.0% 88.2% 100.0% boost::corosio::parse_ipv4_address(std::__1::basic_string_view<char, std::__1::char_traits<char>>, boost::corosio::ipv4_address&) :176 68x 100.0% 91.7% 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 <ostream>
13 #include <stdexcept>
14
15 namespace boost::corosio {
16
17 17358x ipv4_address::ipv4_address(uint_type u) noexcept : addr_(u) {}
18
19 32306x ipv4_address::ipv4_address(bytes_type const& bytes) noexcept
20 16153x {
21 48459x addr_ = (static_cast<std::uint32_t>(bytes[0]) << 24) |
22 32306x (static_cast<std::uint32_t>(bytes[1]) << 16) |
23 32306x (static_cast<std::uint32_t>(bytes[2]) << 8) |
24 16153x (static_cast<std::uint32_t>(bytes[3]));
25 16153x }
26
27 20x ipv4_address::ipv4_address(std::string_view s)
28 10x {
29 10x auto ec = parse_ipv4_address(s, *this);
30
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 10x if (ec)
31
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 3x throw std::invalid_argument("invalid IPv4 address");
32 10x }
33
34 auto
35 8716x ipv4_address::to_bytes() const noexcept -> bytes_type
36 {
37 bytes_type bytes;
38 8716x bytes[0] = static_cast<unsigned char>((addr_ >> 24) & 0xff);
39 8716x bytes[1] = static_cast<unsigned char>((addr_ >> 16) & 0xff);
40 8716x bytes[2] = static_cast<unsigned char>((addr_ >> 8) & 0xff);
41 8716x bytes[3] = static_cast<unsigned char>(addr_ & 0xff);
42 8716x return bytes;
43 }
44
45 auto
46 10x ipv4_address::to_uint() const noexcept -> uint_type
47 {
48 10x return addr_;
49 }
50
51 std::string
52 11x ipv4_address::to_string() const
53 {
54 char buf[max_str_len];
55 11x auto n = print_impl(buf);
56 11x return std::string(buf, n);
57 }
58
59 std::string_view
60 4x ipv4_address::to_buffer(char* dest, std::size_t dest_size) const
61 {
62
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 4x if (dest_size < max_str_len)
63 ✗ throw std::length_error("buffer too small for IPv4 address");
64 4x auto n = print_impl(dest);
65 4x return std::string_view(dest, n);
66 ✗ }
67
68 bool
69 5x ipv4_address::is_loopback() const noexcept
70 {
71 5x return (addr_ & 0xFF000000) == 0x7F000000;
72 }
73
74 bool
75 4x ipv4_address::is_unspecified() const noexcept
76 {
77 4x return addr_ == 0;
78 }
79
80 bool
81 4x ipv4_address::is_multicast() const noexcept
82 {
83 4x return (addr_ & 0xF0000000) == 0xE0000000;
84 }
85
86 std::ostream&
87 1x operator<<(std::ostream& os, ipv4_address const& addr)
88 {
89 char buf[ipv4_address::max_str_len];
90 1x os << addr.to_buffer(buf, sizeof(buf));
91 1x return os;
92 }
93
94 std::size_t
95 15x ipv4_address::print_impl(char* dest) const noexcept
96 {
97 15x auto const start = dest;
98 75x auto const write = [](char*& dest, unsigned char v) {
99
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 60x if (v >= 100)
100 {
101 19x *dest++ = '0' + v / 100;
102 19x v %= 100;
103 19x *dest++ = '0' + v / 10;
104 19x v %= 10;
105 19x }
106
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 41x else if (v >= 10)
107 {
108 5x *dest++ = '0' + v / 10;
109 5x v %= 10;
110 5x }
111 60x *dest++ = '0' + v;
112 60x };
113
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 15x write(dest, static_cast<unsigned char>((addr_ >> 24) & 0xff));
114 15x *dest++ = '.';
115
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 15x write(dest, static_cast<unsigned char>((addr_ >> 16) & 0xff));
116 15x *dest++ = '.';
117
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 15x write(dest, static_cast<unsigned char>((addr_ >> 8) & 0xff));
118 15x *dest++ = '.';
119
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 15x write(dest, static_cast<unsigned char>(addr_ & 0xff));
120 15x return static_cast<std::size_t>(dest - start);
121 }
122
123 namespace {
124
125 // Parse a decimal octet (0-255), no leading zeros except "0"
126 // Returns true on success, advances `it`
127 bool
128 217x parse_dec_octet(char const*& it, char const* end, unsigned char& octet) noexcept
129 {
130
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 217x if (it == end)
131 2x return false;
132
133 215x char c = *it;
134
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 215x if (c < '0' || c > '9')
135 6x return false;
136
137 209x unsigned v = static_cast<unsigned>(c - '0');
138 209x ++it;
139
140
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 209x if (v == 0)
141 {
142 // "0" is valid, but "00", "01", etc. are not
143
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 33x if (it != end && *it >= '0' && *it <= '9')
144 3x return false;
145 30x octet = 0;
146 30x return true;
147 }
148
149 // First digit was 1-9, can have more
150
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 176x if (it != end && *it >= '0' && *it <= '9')
151 {
152 50x v = v * 10 + static_cast<unsigned>(*it - '0');
153 50x ++it;
154
155
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 50x if (it != end && *it >= '0' && *it <= '9')
156 {
157 47x v = v * 10 + static_cast<unsigned>(*it - '0');
158 47x ++it;
159
160 // Can't have more than 3 digits
161
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 47x if (it != end && *it >= '0' && *it <= '9')
162 1x return false;
163 46x }
164 49x }
165
166
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 175x if (v > 255)
167 7x return false;
168
169 168x octet = static_cast<unsigned char>(v);
170 168x return true;
171 217x }
172
173 } // namespace
174
175 std::error_code
176 68x parse_ipv4_address(std::string_view s, ipv4_address& addr) noexcept
177 {
178 68x auto it = s.data();
179 68x auto const end = it + s.size();
180
181 unsigned char octets[4];
182
183 // Parse first octet
184
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 68x if (!parse_dec_octet(it, end, octets[0]))
185 13x return std::make_error_code(std::errc::invalid_argument);
186
187 // Parse remaining octets
188
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 198x for (int i = 1; i < 4; ++i)
189 {
190
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 155x if (it == end || *it != '.')
191 6x return std::make_error_code(std::errc::invalid_argument);
192 149x ++it; // skip '.'
193
194
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 149x if (!parse_dec_octet(it, end, octets[i]))
195 6x return std::make_error_code(std::errc::invalid_argument);
196 143x }
197
198 // Must have consumed entire string
199
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 43x if (it != end)
200 5x return std::make_error_code(std::errc::invalid_argument);
201
202 38x addr = ipv4_address(
203 38x ipv4_address::bytes_type{{octets[0], octets[1], octets[2], octets[3]}});
204
205 38x return {};
206 68x }
207
208 } // namespace boost::corosio
209