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1/*
2 [auto_generated]
3 boost/numeric/odeint/util/detail/less_with_sign.hpp
4
5 [begin_description]
6 Helper function to compare times taking into account the sign of dt
7 [end_description]
8
9 Copyright 2012-2015 Mario Mulansky
10 Copyright 2012 Karsten Ahnert
11
12 Distributed under the Boost Software License, Version 1.0.
13 (See accompanying file LICENSE_1_0.txt or
14 copy at http://www.boost.org/LICENSE_1_0.txt)
15 */
16
17#ifndef BOOST_NUMERIC_ODEINT_INTEGRATE_DETAIL_LESS_WITH_SIGN_HPP_INCLUDED
18#define BOOST_NUMERIC_ODEINT_INTEGRATE_DETAIL_LESS_WITH_SIGN_HPP_INCLUDED
19
20#include <limits>
21
22#include <boost/numeric/odeint/util/unit_helper.hpp>
23
24namespace boost {
25namespace numeric {
26namespace odeint {
27namespace detail {
28
29/**
30 * return t1 < t2 if dt > 0 and t1 > t2 if dt < 0 with epsilon accuracy
31 */
32template< typename T >
33bool less_with_sign( T t1 , T t2 , T dt )
34{
35 if( get_unit_value(dt) > 0 )
36 //return t1 < t2;
37 return t2-t1 > std::numeric_limits<T>::epsilon();
38 else
39 //return t1 > t2;
40 return t1-t2 > std::numeric_limits<T>::epsilon();
41}
42
43/**
44 * return t1 <= t2 if dt > 0 and t1 => t2 if dt < 0 with epsilon accuracy
45 */
46template< typename T >
47bool less_eq_with_sign( T t1 , T t2 , T dt )
48{
49 if( get_unit_value(dt) > 0 )
50 return t1-t2 <= std::numeric_limits<T>::epsilon();
51 else
52 return t2-t1 <= std::numeric_limits<T>::epsilon();
53}
54
55template< typename T >
56T min_abs( T t1 , T t2 )
57{
58 BOOST_USING_STD_MIN();
59 BOOST_USING_STD_MAX();
60 if( get_unit_value(t1)>0 )
61 return min BOOST_PREVENT_MACRO_SUBSTITUTION ( t1 , t2 );
62 else
63 return max BOOST_PREVENT_MACRO_SUBSTITUTION ( t1 , t2 );
64}
65
66template< typename T >
67T max_abs( T t1 , T t2 )
68{
69 BOOST_USING_STD_MIN();
70 BOOST_USING_STD_MAX();
71 if( get_unit_value(t1)>0 )
72 return max BOOST_PREVENT_MACRO_SUBSTITUTION ( t1 , t2 );
73 else
74 return min BOOST_PREVENT_MACRO_SUBSTITUTION ( t1 , t2 );
75}
76} } } }
77
78#endif