44 lines
1.4 KiB
Plaintext
44 lines
1.4 KiB
Plaintext
|
/* Boost interval/detail/c99sub_rounding_control.hpp file
|
|||
|
|
*
|
|||
|
|
* Copyright 2000 Jens Maurer
|
|||
|
|
* Copyright 2002 Herv<72> Br<42>nnimann, 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 <boost/detail/fenv.hpp> // 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
|