diff -r 000000000000 -r bde4ae8d615e os/ossrv/ossrv_pub/boost_apis/boost/numeric/interval/rounding.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/os/ossrv/ossrv_pub/boost_apis/boost/numeric/interval/rounding.hpp Fri Jun 15 03:10:57 2012 +0200 @@ -0,0 +1,101 @@ +/* Boost interval/rounding.hpp template implementation file + * + * Copyright 2002-2003 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_ROUNDING_HPP +#define BOOST_NUMERIC_INTERVAL_ROUNDING_HPP + +namespace boost { +namespace numeric { +namespace interval_lib { + +/* + * Default rounding_control class (does nothing) + */ + +template +struct rounding_control +{ + typedef int rounding_mode; + static void get_rounding_mode(rounding_mode&) {} + static void set_rounding_mode(rounding_mode) {} + static void upward() {} + static void downward() {} + static void to_nearest() {} + static const T& to_int(const T& x) { return x; } + static const T& force_rounding(const T& x) { return x; } +}; + +/* + * A few rounding control classes (exact/std/opp: see documentation) + * rounded_arith_* control the rounding of the arithmetic operators + * rounded_transc_* control the rounding of the transcendental functions + */ + +template > +struct rounded_arith_exact; + +template > +struct rounded_arith_std; + +template > +struct rounded_arith_opp; + +template +struct rounded_transc_dummy; + +template > +struct rounded_transc_exact; + +template > +struct rounded_transc_std; + +template > +struct rounded_transc_opp; + +/* + * State-saving classes: allow to set and reset rounding control + */ + +namespace detail { + +template +struct save_state_unprotected: Rounding +{ + typedef save_state_unprotected unprotected_rounding; +}; + +} // namespace detail + +template +struct save_state: Rounding +{ + typename Rounding::rounding_mode mode; + save_state() { + this->get_rounding_mode(mode); + this->init(); + } + ~save_state() { this->set_rounding_mode(mode); } + typedef detail::save_state_unprotected unprotected_rounding; +}; + +template +struct save_state_nothing: Rounding +{ + typedef save_state_nothing unprotected_rounding; +}; + +template +struct rounded_math: save_state_nothing > +{}; + +} // namespace interval_lib +} // namespace numeric +} // namespace boost + +#endif // BOOST_NUMERIC_INTERVAL_ROUNDING_HPP