/usr/include/boost/math/special_functions
Edit: /usr/include/boost/math/special_functions/trunc.hpp (5450B)
// Copyright John Maddock 2007.
// Use, modification and distribution are subject to 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_MATH_TRUNC_HPP
#define BOOST_MATH_TRUNC_HPP
#ifdef _MSC_VER
#pragma once
#endif
#include
#include
#include
#include
#include
#include
namespace boost{ namespace math{ namespace detail{
template
inline typename tools::promote_args::type trunc(const T& v, const Policy& pol, const boost::false_type&)
{
BOOST_MATH_STD_USING
typedef typename tools::promote_args::type result_type;
if(!(boost::math::isfinite)(v))
return policies::raise_rounding_error("boost::math::trunc<%1%>(%1%)", 0, static_cast(v), static_cast(v), pol);
return (v >= 0) ? static_cast(floor(v)) : static_cast(ceil(v));
}
template
inline typename tools::promote_args::type trunc(const T& v, const Policy&, const boost::true_type&)
{
return v;
}
}
template
inline typename tools::promote_args::type trunc(const T& v, const Policy& pol)
{
return detail::trunc(v, pol, boost::integral_constant::value>());
}
template
inline typename tools::promote_args::type trunc(const T& v)
{
return trunc(v, policies::policy<>());
}
//
// The following functions will not compile unless T has an
// implicit conversion to the integer types. For user-defined
// number types this will likely not be the case. In that case
// these functions should either be specialized for the UDT in
// question, or else overloads should be placed in the same
// namespace as the UDT: these will then be found via argument
// dependent lookup. See our concept archetypes for examples.
//
template
inline int itrunc(const T& v, const Policy& pol)
{
BOOST_MATH_STD_USING
typedef typename tools::promote_args::type result_type;
result_type r = boost::math::trunc(v, pol);
if((r > (std::numeric_limits::max)()) || (r < (std::numeric_limits::min)()))
return static_cast(policies::raise_rounding_error("boost::math::itrunc<%1%>(%1%)", 0, static_cast(v), 0, pol));
return static_cast(r);
}
template
inline int itrunc(const T& v)
{
return itrunc(v, policies::policy<>());
}
template
inline long ltrunc(const T& v, const Policy& pol)
{
BOOST_MATH_STD_USING
typedef typename tools::promote_args::type result_type;
result_type r = boost::math::trunc(v, pol);
if((r > (std::numeric_limits::max)()) || (r < (std::numeric_limits::min)()))
return static_cast(policies::raise_rounding_error("boost::math::ltrunc<%1%>(%1%)", 0, static_cast(v), 0L, pol));
return static_cast(r);
}
template
inline long ltrunc(const T& v)
{
return ltrunc(v, policies::policy<>());
}
#ifdef BOOST_HAS_LONG_LONG
template
inline boost::long_long_type lltrunc(const T& v, const Policy& pol)
{
BOOST_MATH_STD_USING
typedef typename tools::promote_args::type result_type;
result_type r = boost::math::trunc(v, pol);
if((r > (std::numeric_limits::max)()) || (r < (std::numeric_limits::min)()))
return static_cast(policies::raise_rounding_error("boost::math::lltrunc<%1%>(%1%)", 0, v, static_cast(0), pol));
return static_cast(r);
}
template
inline boost::long_long_type lltrunc(const T& v)
{
return lltrunc(v, policies::policy<>());
}
#endif
template
inline typename boost::enable_if_c::value, int>::type
iconvert(const T& v, const Policy&)
{
return static_cast(v);
}
template
inline typename boost::disable_if_c::value, int>::type
iconvert(const T& v, const Policy& pol)
{
using boost::math::itrunc;
return itrunc(v, pol);
}
template
inline typename boost::enable_if_c::value, long>::type
lconvert(const T& v, const Policy&)
{
return static_cast(v);
}
template
inline typename boost::disable_if_c::value, long>::type
lconvert(const T& v, const Policy& pol)
{
using boost::math::ltrunc;
return ltrunc(v, pol);
}
#ifdef BOOST_HAS_LONG_LONG
template
inline typename boost::enable_if_c::value, boost::long_long_type>::type
llconvertert(const T& v, const Policy&)
{
return static_cast(v);
}
template
inline typename boost::disable_if_c::value, boost::long_long_type>::type
llconvertert(const T& v, const Policy& pol)
{
using boost::math::lltrunc;
return lltrunc(v, pol);
}
#endif
}} // namespaces
#endif // BOOST_MATH_TRUNC_HPP