ceph/src/boost/boost/multiprecision/detail/functions/trunc.hpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //  Copyright 2022 Matt Borland. Distributed under the Boost
   3 //  Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef BOOST_MP_DETAIL_FUNCTIONS_TRUNC_HPP
   7 #define BOOST_MP_DETAIL_FUNCTIONS_TRUNC_HPP
   8
   9 #include <cmath>
  10 #include <limits>
  11 #include <stdexcept>
  12 #include <boost/multiprecision/detail/standalone_config.hpp>
  13 #include <boost/multiprecision/detail/no_exceptions_support.hpp>
  14
  15 #ifdef BOOST_MP_MATH_AVAILABLE
  16 #include <boost/math/special_functions/trunc.hpp>
  17 #endif
  18
  19 namespace boost { namespace multiprecision { namespace detail {
  20
  21 namespace impl {
  22
  23 template <typename T>
  24 inline T trunc BOOST_PREVENT_MACRO_SUBSTITUTION (const T arg)
  25 {
  26     using std::floor;
  27     using std::ceil;
  28
  29     return (arg > 0) ? floor(arg) : ceil(arg);
  30 }
  31
  32 } // namespace impl
  33
  34 #ifdef BOOST_MP_MATH_AVAILABLE
  35
  36 template <typename T>
  37 inline long long lltrunc BOOST_PREVENT_MACRO_SUBSTITUTION (const T arg)
  38 {
  39     return boost::math::lltrunc(arg);
  40 }
  41
  42 template <typename T>
  43 inline int itrunc BOOST_PREVENT_MACRO_SUBSTITUTION (const T arg)
  44 {
  45     return boost::math::itrunc(arg);
  46 }
  47
  48 #else
  49
  50 template <typename T>
  51 inline long long lltrunc BOOST_PREVENT_MACRO_SUBSTITUTION (const T arg)
  52 {
  53     if (arg > LLONG_MAX)
  54     {
  55         BOOST_MP_THROW_EXCEPTION(std::domain_error("arg cannot be converted into a long long"));
  56     }
  57
  58     return static_cast<long long>(boost::multiprecision::detail::impl::trunc(arg));
  59 }
  60
  61 template <typename T>
  62 inline int itrunc BOOST_PREVENT_MACRO_SUBSTITUTION (const T arg)
  63 {
  64     if (arg > INT_MAX)
  65     {
  66         BOOST_MP_THROW_EXCEPTION(std::domain_error("arg cannot be converted into an int"));
  67     }
  68
  69     return static_cast<int>(boost::multiprecision::detail::impl::trunc(arg));
  70 }
  71
  72 #endif
  73
  74 }}} // Namespaces
  75
  76 #endif // BOOST_MP_DETAIL_FUNCTIONS_TRUNC_HPP