Chris@16: /* Boost interval/detail/test_input.hpp file
Chris@16:  *
Chris@16:  * Copyright 2002 Hervé Brönnimann, Guillaume Melquiond, Sylvain Pion
Chris@16:  *
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  * (See accompanying file LICENSE_1_0.txt or
Chris@16:  * copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_NUMERIC_INTERVAL_DETAIL_TEST_INPUT_HPP
Chris@16: #define BOOST_NUMERIC_INTERVAL_DETAIL_TEST_INPUT_HPP
Chris@16: 
Chris@16: #include <boost/numeric/interval/detail/interval_prototype.hpp>
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace numeric {
Chris@16: namespace interval_lib {
Chris@16: namespace user {
Chris@16: 
Chris@16: template<class T> inline
Chris@16: bool is_zero(T const &v) { return v == static_cast<T>(0); }
Chris@16: 
Chris@16: template<class T> inline
Chris@16: bool is_neg (T const &v) { return v <  static_cast<T>(0); }
Chris@16: 
Chris@16: template<class T> inline
Chris@16: bool is_pos (T const &v) { return v >  static_cast<T>(0); }
Chris@16: 
Chris@16: } // namespace user
Chris@16: 
Chris@16: namespace detail {
Chris@16: 
Chris@16: template<class T, class Policies> inline
Chris@16: bool test_input(const interval<T, Policies>& x) {
Chris@16:   typedef typename Policies::checking checking;
Chris@16:   return checking::is_empty(x.lower(), x.upper());
Chris@16: }
Chris@16: 
Chris@16: template<class T, class Policies1, class Policies2> inline
Chris@16: bool test_input(const interval<T, Policies1>& x, const interval<T, Policies2>& y) {
Chris@16:   typedef typename Policies1::checking checking1;
Chris@16:   typedef typename Policies2::checking checking2;
Chris@16:   return checking1::is_empty(x.lower(), x.upper()) ||
Chris@16:          checking2::is_empty(y.lower(), y.upper());
Chris@16: }
Chris@16: 
Chris@16: template<class T, class Policies> inline
Chris@16: bool test_input(const T& x, const interval<T, Policies>& y) {
Chris@16:   typedef typename Policies::checking checking;
Chris@16:   return checking::is_nan(x) || checking::is_empty(y.lower(), y.upper());
Chris@16: }
Chris@16: 
Chris@16: template<class T, class Policies> inline
Chris@16: bool test_input(const interval<T, Policies>& x, const T& y) {
Chris@16:   typedef typename Policies::checking checking;
Chris@16:   return checking::is_empty(x.lower(), x.upper()) || checking::is_nan(y);
Chris@16: }
Chris@16: 
Chris@16: template<class T, class Policies> inline
Chris@16: bool test_input(const T& x) {
Chris@16:   typedef typename Policies::checking checking;
Chris@16:   return checking::is_nan(x);
Chris@16: }
Chris@16: 
Chris@16: template<class T, class Policies> inline
Chris@16: bool test_input(const T& x, const T& y) {
Chris@16:   typedef typename Policies::checking checking;
Chris@16:   return checking::is_nan(x) || checking::is_nan(y);
Chris@16: }
Chris@16: 
Chris@16: } // namespace detail
Chris@16: } // namespace interval_lib
Chris@16: } // namespace numeric
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // BOOST_NUMERIC_INTERVAL_DETAIL_TEST_INPUT_HPP