boost/stacktrace/detail/to_hex_array.hpp
// Copyright Antony Polukhin, 2016-2018.
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_STACKTRACE_DETAIL_TO_HEX_ARRAY_HPP
#define BOOST_STACKTRACE_DETAIL_TO_HEX_ARRAY_HPP
#include <boost/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
# pragma once
#endif
#include <boost/array.hpp>
#include <boost/static_assert.hpp>
#include <boost/type_traits/is_pointer.hpp>
#include <boost/type_traits/make_unsigned.hpp>
namespace boost { namespace stacktrace { namespace detail {
BOOST_STATIC_CONSTEXPR char to_hex_array_bytes[] = "0123456789ABCDEF";
template <class T>
inline boost::array<char, 2 + sizeof(void*) * 2 + 1> to_hex_array(T addr) BOOST_NOEXCEPT {
boost::array<char, 2 + sizeof(void*) * 2 + 1> ret = {"0x"};
ret.back() = '\0';
BOOST_STATIC_ASSERT_MSG(!boost::is_pointer<T>::value, "");
const std::size_t s = sizeof(T);
char* out = ret.data() + s * 2 + 1;
for (std::size_t i = 0; i < s; ++i) {
const unsigned char tmp_addr = (addr & 0xFFu);
*out = to_hex_array_bytes[tmp_addr & 0xF];
-- out;
*out = to_hex_array_bytes[tmp_addr >> 4];
-- out;
addr >>= 8;
}
return ret;
}
inline boost::array<char, 2 + sizeof(void*) * 2 + 1> to_hex_array(const void* addr) BOOST_NOEXCEPT {
return to_hex_array(
reinterpret_cast< boost::make_unsigned<std::ptrdiff_t>::type >(addr)
);
}
}}} // namespace boost::stacktrace::detail
#endif // BOOST_STACKTRACE_DETAIL_TO_HEX_ARRAY_HPP