Index/src / corosio / src / ipv4_address.cpp

src/corosio/src/ipv4_address.cpp

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ipv4_address.cpp
f(x) Functions (15)
Function Calls Lines Branches Blocks
boost::corosio::ipv4_address::ipv4_address(unsigned int) :17 23736x 100.0% – 100.0% boost::corosio::ipv4_address::ipv4_address(std::__1::array<unsigned char, 4ul> const&) :19 79763x 100.0% – 100.0% boost::corosio::ipv4_address::to_bytes() const :28 18688x 100.0% – 100.0% boost::corosio::ipv4_address::to_uint() const :39 25x 100.0% – 100.0% boost::corosio::ipv4_address::to_string() const :45 24x 100.0% – 100.0% boost::corosio::ipv4_address::to_buffer(char*, unsigned long) const :53 8x 83.3% 75.0% 66.0% boost::corosio::ipv4_address::is_loopback() const :62 9x 100.0% – 100.0% boost::corosio::ipv4_address::is_unspecified() const :68 8x 100.0% – 100.0% boost::corosio::ipv4_address::is_multicast() const :74 6x 100.0% – 100.0% boost::corosio::operator<<(std::__1::basic_ostream<char, std::__1::char_traits<char>>&, boost::corosio::ipv4_address const&) :80 2x 100.0% – 100.0% boost::corosio::ipv4_address::print_impl(char*) const :88 31x 100.0% – 83.0% boost::corosio::ipv4_address::print_impl(char*) const::$_0::operator()(char*&, unsigned char) const :91 124x 100.0% 66.7% 100.0% boost::corosio::(anonymous namespace)::parse_dec_octet(char const*&, char const*, unsigned char&) :121 470x 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&) :169 164x 100.0% 100.0% 100.0% boost::corosio::make_ipv4_address(std::__1::basic_string_view<char, std::__1::char_traits<char>>) :202 164x 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 <ostream>
13 #include <stdexcept>
14
15 namespace boost::corosio {
16
17 23736x ipv4_address::ipv4_address(uint_type u) noexcept : addr_(u) {}
18
19 79763x ipv4_address::ipv4_address(bytes_type const& bytes) noexcept
20 39881x {
21 119646x addr_ = (static_cast<std::uint32_t>(bytes[0]) << 24) |
22 79764x (static_cast<std::uint32_t>(bytes[1]) << 16) |
23 79764x (static_cast<std::uint32_t>(bytes[2]) << 8) |
24 39882x (static_cast<std::uint32_t>(bytes[3]));
25 39881x }
26
27 auto
28 18688x ipv4_address::to_bytes() const noexcept -> bytes_type
29 {
30 bytes_type bytes;
31 18688x bytes[0] = static_cast<unsigned char>((addr_ >> 24) & 0xff);
32 18688x bytes[1] = static_cast<unsigned char>((addr_ >> 16) & 0xff);
33 18688x bytes[2] = static_cast<unsigned char>((addr_ >> 8) & 0xff);
34 18688x bytes[3] = static_cast<unsigned char>(addr_ & 0xff);
35 18688x return bytes;
36 }
37
38 auto
39 25x ipv4_address::to_uint() const noexcept -> uint_type
40 {
41 25x return addr_;
42 }
43
44 std::string
45 24x ipv4_address::to_string() const
46 {
47 char buf[max_str_len];
48 24x auto n = print_impl(buf);
49 24x return std::string(buf, n);
50 }
51
52 std::string_view
53 8x ipv4_address::to_buffer(char* dest, std::size_t dest_size) const
54 {
55
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 8x if (dest_size < max_str_len)
56
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 1x throw std::length_error("buffer too small for IPv4 address");
57 7x auto n = print_impl(dest);
58 7x return std::string_view(dest, n);
59 ✗ }
60
61 bool
62 9x ipv4_address::is_loopback() const noexcept
63 {
64 9x return (addr_ & 0xFF000000) == 0x7F000000;
65 }
66
67 bool
68 8x ipv4_address::is_unspecified() const noexcept
69 {
70 8x return addr_ == 0;
71 }
72
73 bool
74 6x ipv4_address::is_multicast() const noexcept
75 {
76 6x return (addr_ & 0xF0000000) == 0xE0000000;
77 }
78
79 std::ostream&
80 2x operator<<(std::ostream& os, ipv4_address const& addr)
81 {
82 char buf[ipv4_address::max_str_len];
83 2x os << addr.to_buffer(buf, sizeof(buf));
84 2x return os;
85 }
86
87 std::size_t
88 31x ipv4_address::print_impl(char* dest) const noexcept
89 {
90 31x auto const start = dest;
91 155x auto const write = [](char*& dest, unsigned char v) {
92
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 124x if (v >= 100)
93 {
94 44x *dest++ = '0' + v / 100;
95 44x v %= 100;
96 44x *dest++ = '0' + v / 10;
97 44x v %= 10;
98 44x }
99
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 80x else if (v >= 10)
100 {
101 5x *dest++ = '0' + v / 10;
102 5x v %= 10;
103 5x }
104 124x *dest++ = '0' + v;
105 124x };
106
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 31x write(dest, static_cast<unsigned char>((addr_ >> 24) & 0xff));
107 31x *dest++ = '.';
108
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 31x write(dest, static_cast<unsigned char>((addr_ >> 16) & 0xff));
109 31x *dest++ = '.';
110
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 31x write(dest, static_cast<unsigned char>((addr_ >> 8) & 0xff));
111 31x *dest++ = '.';
112
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 31x write(dest, static_cast<unsigned char>(addr_ & 0xff));
113 31x return static_cast<std::size_t>(dest - start);
114 }
115
116 namespace {
117
118 // Parse a decimal octet (0-255), no leading zeros except "0"
119 // Returns true on success, advances `it`
120 bool
121 470x parse_dec_octet(char const*& it, char const* end, unsigned char& octet) noexcept
122 {
123
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 470x if (it == end)
124 4x return false;
125
126 466x char c = *it;
127
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 466x if (c < '0' || c > '9')
128 45x return false;
129
130 421x unsigned v = static_cast<unsigned>(c - '0');
131 421x ++it;
132
133
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 421x if (v == 0)
134 {
135 // "0" is valid, but "00", "01", etc. are not
136
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 58x if (it != end && *it >= '0' && *it <= '9')
137 3x return false;
138 55x octet = 0;
139 55x return true;
140 }
141
142 // First digit was 1-9, can have more
143
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 363x if (it != end && *it >= '0' && *it <= '9')
144 {
145 118x v = v * 10 + static_cast<unsigned>(*it - '0');
146 118x ++it;
147
148
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 118x if (it != end && *it >= '0' && *it <= '9')
149 {
150 115x v = v * 10 + static_cast<unsigned>(*it - '0');
151 115x ++it;
152
153 // Can't have more than 3 digits
154
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 115x if (it != end && *it >= '0' && *it <= '9')
155 3x return false;
156 112x }
157 115x }
158
159
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 360x if (v > 255)
160 9x return false;
161
162 351x octet = static_cast<unsigned char>(v);
163 351x return true;
164 470x }
165
166 } // namespace
167
168 static std::error_code
169 164x parse_ipv4_impl(std::string_view s, ipv4_address& addr) noexcept
170 {
171 164x auto it = s.data();
172 164x auto const end = it + s.size();
173
174 unsigned char octets[4];
175
176 // Parse first octet
177
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 164x if (!parse_dec_octet(it, end, octets[0]))
178 55x return std::make_error_code(std::errc::invalid_argument);
179
180 // Parse remaining octets
181
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 406x for (int i = 1; i < 4; ++i)
182 {
183
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 315x if (it == end || *it != '.')
184 9x return std::make_error_code(std::errc::invalid_argument);
185 306x ++it; // skip '.'
186
187
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 306x if (!parse_dec_octet(it, end, octets[i]))
188 9x return std::make_error_code(std::errc::invalid_argument);
189 297x }
190
191 // Must have consumed entire string
192
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 91x if (it != end)
193 10x return std::make_error_code(std::errc::invalid_argument);
194
195 81x addr = ipv4_address(
196 81x ipv4_address::bytes_type{{octets[0], octets[1], octets[2], octets[3]}});
197
198 81x return {};
199 164x }
200
201 capy::results<ipv4_address>
202 164x make_ipv4_address(std::string_view s) noexcept
203 {
204 164x ipv4_address addr;
205
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 164x if (auto ec = parse_ipv4_impl(s, addr))
206 83x return {ec, ipv4_address{}};
207 81x return {std::error_code{}, addr};
208 164x }
209
210 } // namespace boost::corosio
211