libs/http/src/server/detail/stable_string.hpp

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1			//
2			// Copyright (c) 2025 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/http
8			//
9
10			#ifndef BOOST_HTTP_SERVER_DETAIL_STABLE_STRING_HPP
11			#define BOOST_HTTP_SERVER_DETAIL_STABLE_STRING_HPP
12
13			#include <boost/http/detail/config.hpp>
14			#include <cstdint>
15			#include <cstdlib>
16
17			namespace boost {
18			namespace http {
19			namespace detail {
20
21			// avoids SBO
22			class stable_string
23			{
24			char const* p_ = 0;
25			std::size_t n_ = 0;
26
27			public:
28		982	~stable_string()
29			{
30	2/2 ✓ Branch 0 taken 278 times. ✓ Branch 1 taken 704 times.	982	if(p_)
31	1/2 ✓ Branch 0 taken 278 times. ✗ Branch 1 not taken.	278	delete[] p_;
32		982	}
33
34			stable_string() = default;
35
36		704	stable_string(
37			stable_string&& other) noexcept
38		704	: p_(other.p_)
39		704	, n_(other.n_)
40			{
41		704	other.p_ = nullptr;
42		704	other.n_ = 0;
43		704	}
44
45			stable_string& operator=(
46			stable_string&& other) noexcept
47			{
48			auto p = p_;
49			auto n = n_;
50			p_ = other.p_;
51			n_ = other.n_;
52			other.p_ = p;
53			other.n_ = n;
54			return *this;
55			}
56
57			explicit
58		278	stable_string(
59			std::string_view s)
60		556	: p_(
61		834	[&]
62			{
63		278	auto p =new char[s.size()];
64		278	std::memcpy(p, s.data(), s.size());
65		278	return p;
66	1/1 ✓ Branch 1 taken 278 times.	278	}())
67		278	, n_(s.size())
68			{
69		278	}
70
71			stable_string(
72			char const* it, char const* end)
73			: stable_string(std::string_view(it, end))
74			{
75			}
76
77		180	char const* data() const noexcept
78			{
79		180	return p_;
80			}
81
82		180	std::size_t size() const noexcept
83			{
84		180	return n_;
85			}
86
87		180	operator core::string_view() const noexcept
88			{
89		180	return { data(), size() };
90			}
91
92			operator std::string_view() const noexcept
93			{
94			return { data(), size() };
95			}
96			};
97
98			} // detail
99			} // http
100			} // boost
101
102			#endif
103