ceph/src/boost/libs/numeric/odeint/include/boost/numeric/odeint/util/detail/less_with_sign.hpp

   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
  24 namespace boost {
  25 namespace numeric {
  26 namespace odeint {
  27 namespace detail {
  28
  29 /**
  30  * return t1 < t2 if dt > 0 and t1 > t2 if dt < 0 with epsilon accuracy
  31  */
  32 template< typename T >
  33 bool 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  */
  46 template< typename T >
  47 bool 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
  55 template< typename T >
  56 T 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
  66 template< typename T >
  67 T 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