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1 | // Copyright Antony Polukhin, 2016-2017. |
2 | // | |
3 | // Distributed under the Boost Software License, Version 1.0. (See | |
4 | // accompanying file LICENSE_1_0.txt or copy at | |
5 | // http://www.boost.org/LICENSE_1_0.txt) | |
6 | ||
7 | #ifndef BOOST_STACKTRACE_DETAIL_TO_HEX_ARRAY_HPP | |
8 | #define BOOST_STACKTRACE_DETAIL_TO_HEX_ARRAY_HPP | |
9 | ||
10 | #include <boost/config.hpp> | |
11 | #ifdef BOOST_HAS_PRAGMA_ONCE | |
12 | # pragma once | |
13 | #endif | |
14 | ||
15 | #include <boost/array.hpp> | |
16 | #include <boost/static_assert.hpp> | |
17 | #include <boost/type_traits/is_pointer.hpp> | |
18 | #include <boost/type_traits/make_unsigned.hpp> | |
19 | ||
20 | namespace boost { namespace stacktrace { namespace detail { | |
21 | ||
22 | BOOST_STATIC_CONSTEXPR char to_hex_array_bytes[] = "0123456789ABCDEF"; | |
23 | ||
24 | template <class T> | |
25 | inline boost::array<char, 2 + sizeof(void*) * 2 + 1> to_hex_array(T addr) BOOST_NOEXCEPT { | |
26 | boost::array<char, 2 + sizeof(void*) * 2 + 1> ret = {"0x"}; | |
27 | ret.back() = '\0'; | |
28 | BOOST_STATIC_ASSERT_MSG(!boost::is_pointer<T>::value, ""); | |
29 | ||
30 | const std::size_t s = sizeof(T); | |
31 | ||
32 | char* out = ret.data() + s * 2 + 1; | |
33 | ||
34 | for (std::size_t i = 0; i < s; ++i) { | |
35 | const unsigned char tmp_addr = (addr & 0xFFu); | |
36 | *out = to_hex_array_bytes[tmp_addr & 0xF]; | |
37 | -- out; | |
38 | *out = to_hex_array_bytes[tmp_addr >> 4]; | |
39 | -- out; | |
40 | addr >>= 8; | |
41 | } | |
42 | ||
43 | return ret; | |
44 | } | |
45 | ||
46 | inline boost::array<char, 2 + sizeof(void*) * 2 + 1> to_hex_array(const void* addr) BOOST_NOEXCEPT { | |
47 | return to_hex_array( | |
48 | reinterpret_cast< boost::make_unsigned<std::ptrdiff_t>::type >(addr) | |
49 | ); | |
50 | } | |
51 | ||
52 | }}} // namespace boost::stacktrace::detail | |
53 | ||
54 | #endif // BOOST_STACKTRACE_DETAIL_TO_HEX_ARRAY_HPP |