Jip J. Dekker
981be2067e
git-subtree-dir: software/gecode_on_replay git-subtree-split: 8051d92b9c89e49cccfbd1c201371580d7703ab4
44 lines
1.4 KiB
C++
44 lines
1.4 KiB
C++
/* Boost interval/detail/c99sub_rounding_control.hpp file
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*
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* Copyright 2000 Jens Maurer
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* Copyright 2002 Hervé Brönnimann, Guillaume Melquiond, Sylvain Pion
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*
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or
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* copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef GECODE_BOOST_NUMERIC_INTERVAL_DETAIL_C99SUB_ROUNDING_CONTROL_HPP
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#define GECODE_BOOST_NUMERIC_INTERVAL_DETAIL_C99SUB_ROUNDING_CONTROL_HPP
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#include <fenv.h> // ISO C 99 rounding mode control
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namespace gecode_boost {
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namespace numeric {
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namespace interval_lib {
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namespace detail {
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extern "C" { double rint(double); }
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struct c99_rounding_control
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{
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typedef int rounding_mode;
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static void set_rounding_mode(rounding_mode mode) { fesetround(mode); }
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static void get_rounding_mode(rounding_mode &mode) { mode = fegetround(); }
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static void downward() { set_rounding_mode(FE_DOWNWARD); }
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static void upward() { set_rounding_mode(FE_UPWARD); }
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static void to_nearest() { set_rounding_mode(FE_TONEAREST); }
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static void toward_zero() { set_rounding_mode(FE_TOWARDZERO); }
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template<class T>
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static T to_int(const T& r) { return rint(r); }
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};
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} // namespace detail
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} // namespace interval_lib
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} // namespace numeric
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} // namespace gecode_boost
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#endif // GECODE_BOOST_NUMERIC_INTERVAL_DETAIL_C99SUB_ROUBDING_CONTROL_HPP
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