| 1 | /* |
|---|---|
| 2 | * Copyright Andrey Semashev 2007 - 2015. |
| 3 | * Distributed under the Boost Software License, Version 1.0. |
| 4 | * (See accompanying file LICENSE_1_0.txt or copy at |
| 5 | * http://www.boost.org/LICENSE_1_0.txt) |
| 6 | */ |
| 7 | /*! |
| 8 | * \file id_formatting.hpp |
| 9 | * \author Andrey Semashev |
| 10 | * \date 25.01.2015 |
| 11 | * |
| 12 | * \brief This header is the Boost.Log library implementation, see the library documentation |
| 13 | * at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html. |
| 14 | */ |
| 15 | |
| 16 | #ifndef BOOST_LOG_ID_FORMATTING_HPP_INCLUDED_ |
| 17 | #define BOOST_LOG_ID_FORMATTING_HPP_INCLUDED_ |
| 18 | |
| 19 | #include <boost/log/detail/config.hpp> |
| 20 | #include <cstddef> |
| 21 | #include <boost/log/detail/header.hpp> |
| 22 | |
| 23 | namespace boost { |
| 24 | |
| 25 | BOOST_LOG_OPEN_NAMESPACE |
| 26 | |
| 27 | namespace aux { |
| 28 | |
| 29 | // Defined in dump.cpp |
| 30 | extern const char g_hex_char_table[2][16]; |
| 31 | |
| 32 | template< std::size_t IdSize, typename CharT, typename IdT > |
| 33 | inline void format_id(CharT* buf, std::size_t size, IdT id, bool uppercase) BOOST_NOEXCEPT |
| 34 | { |
| 35 | const char* const char_table = g_hex_char_table[uppercase]; |
| 36 | |
| 37 | // Input buffer is assumed to be always larger than 2 chars |
| 38 | *buf++ = static_cast< CharT >(char_table[0]); // '0' |
| 39 | *buf++ = static_cast< CharT >(char_table[10] + ('x' - 'a')); // 'x' |
| 40 | |
| 41 | size -= 3; // reserve space for the terminating 0 |
| 42 | std::size_t i = 0; |
| 43 | const std::size_t n = (size > (IdSize * 2u)) ? IdSize * 2u : size; |
| 44 | for (std::size_t shift = n * 4u - 4u; i < n; ++i, shift -= 4u) |
| 45 | { |
| 46 | buf[i] = static_cast< CharT >(char_table[(id >> shift) & 15u]); |
| 47 | } |
| 48 | |
| 49 | buf[i] = static_cast< CharT >('\0'); |
| 50 | } |
| 51 | |
| 52 | } // namespace aux |
| 53 | |
| 54 | BOOST_LOG_CLOSE_NAMESPACE // namespace log |
| 55 | |
| 56 | } // namespace boost |
| 57 | |
| 58 | #include <boost/log/detail/footer.hpp> |
| 59 | |
| 60 | #endif // BOOST_LOG_ID_FORMATTING_HPP_INCLUDED_ |
| 61 | |
| 62 |