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Diffstat (limited to 'boost/stacktrace/detail/to_hex_array.hpp')
-rw-r--r-- | boost/stacktrace/detail/to_hex_array.hpp | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/boost/stacktrace/detail/to_hex_array.hpp b/boost/stacktrace/detail/to_hex_array.hpp new file mode 100644 index 0000000000..dd55ded8b6 --- /dev/null +++ b/boost/stacktrace/detail/to_hex_array.hpp @@ -0,0 +1,54 @@ +// Copyright Antony Polukhin, 2016-2017. +// +// 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 |