/* Boost interval/detail/c99sub_rounding_control.hpp file | |
* | |
* Copyright 2000 Jens Maurer | |
* Copyright 2002 Hervé Brönnimann, Guillaume Melquiond, Sylvain Pion | |
* | |
* 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_NUMERIC_INTERVAL_DETAIL_C99SUB_ROUNDING_CONTROL_HPP | |
#define BOOST_NUMERIC_INTERVAL_DETAIL_C99SUB_ROUNDING_CONTROL_HPP | |
#include <fenv.h> // ISO C 99 rounding mode control | |
namespace boost { | |
namespace numeric { | |
namespace interval_lib { | |
namespace detail { | |
extern "C" { double rint(double); } | |
struct c99_rounding_control | |
{ | |
typedef int rounding_mode; | |
static void set_rounding_mode(rounding_mode mode) { fesetround(mode); } | |
static void get_rounding_mode(rounding_mode &mode) { mode = fegetround(); } | |
static void downward() { set_rounding_mode(FE_DOWNWARD); } | |
static void upward() { set_rounding_mode(FE_UPWARD); } | |
static void to_nearest() { set_rounding_mode(FE_TONEAREST); } | |
static void toward_zero() { set_rounding_mode(FE_TOWARDZERO); } | |
template<class T> | |
static T to_int(const T& r) { return rint(r); } | |
}; | |
} // namespace detail | |
} // namespace interval_lib | |
} // namespace numeric | |
} // namespace boost | |
#endif // BOOST_NUMERIC_INTERVAL_DETAIL_C99SUB_ROUBDING_CONTROL_HPP |