ceph/src/boost/boost/stacktrace/detail/to_dec_array.hpp

   1 // Copyright Antony Polukhin, 2016-2019.
   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_DEC_ARRAY_HPP
   8 #define BOOST_STACKTRACE_DETAIL_TO_DEC_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
  17 namespace boost { namespace stacktrace { namespace detail {
  18
  19 // We do not use boost::lexical_cast in this function to reduce module dependencies
  20 inline boost::array<char, 40> to_dec_array(std::size_t value) BOOST_NOEXCEPT {
  21     boost::array<char, 40> ret;
  22     if (!value) {
  23         ret[0] = '0';
  24         ret[1] = '\0';
  25         return ret;
  26     }
  27
  28     std::size_t digits = 0;
  29     for (std::size_t value_copy = value; value_copy; value_copy /= 10) {
  30         ++ digits;
  31     }
  32
  33     for (std::size_t i = 1; i <= digits; ++i) {
  34         ret[digits - i] = static_cast<char>('0' + (value % 10));
  35         value /= 10;
  36     }
  37
  38     ret[digits] = '\0';
  39
  40     return ret;
  41 }
  42
  43
  44 }}} // namespace boost::stacktrace::detail
  45
  46 #endif // BOOST_STACKTRACE_DETAIL_TO_DEC_ARRAY_HPP