ceph/src/boost/libs/units/test/test_scaled_conversion.cpp

   1 // Boost.Units - A C++ library for zero-overhead dimensional analysis and
   2 // unit/quantity manipulation and conversion
   3 //
   4 // Copyright (C) 2003-2008 Matthias Christian Schabel
   5 // Copyright (C) 2007-2008 Steven Watanabe
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See
   8 // accompanying file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10
  11 /**
  12 \file
  13
  14 \brief test_scaled_conversion.cpp
  15
  16 \details
  17 Test unit scaling
  18
  19 Output:
  20 @verbatim
  21 @endverbatim
  22 **/
  23
  24 #include <boost/units/quantity.hpp>
  25 #include <boost/units/conversion.hpp>
  26 #include <boost/units/unit.hpp>
  27 #include <boost/units/base_unit.hpp>
  28 #include <boost/units/scaled_base_unit.hpp>
  29 #include <boost/units/scale.hpp>
  30 #include <boost/units/base_dimension.hpp>
  31 #include <boost/units/derived_dimension.hpp>
  32
  33 #include <boost/core/lightweight_test.hpp>
  34
  35 #define BOOST_UNITS_CHECK_CLOSE(a, b) BOOST_TEST(std::abs((a) - (b)) < .0000001)
  36
  37 namespace bu = boost::units;
  38
  39 struct base_dimension1 : bu::base_dimension<base_dimension1, 1> {};
  40 struct base_dimension2 : bu::base_dimension<base_dimension2, 2> {};
  41 struct base_dimension3 : bu::base_dimension<base_dimension3, 3> {};
  42
  43 typedef bu::derived_dimension<base_dimension1, 1, base_dimension2, 1, base_dimension3, 1>::type dimension4;
  44
  45 struct base_unit1 : bu::base_unit<base_unit1, base_dimension1::dimension_type, 1> {};
  46 struct base_unit2 : bu::base_unit<base_unit2, base_dimension1::dimension_type, 2> {};
  47 struct base_unit3 : bu::base_unit<base_unit3, base_dimension1::dimension_type, 3> {};
  48 struct base_unit4 : bu::base_unit<base_unit4, dimension4, 4> {};
  49 struct base_unit5 : bu::base_unit<base_unit5, base_dimension3::dimension_type, 5> {};
  50
  51 typedef bu::scaled_base_unit<base_unit2, bu::scale<10, bu::static_rational<3> > > scaled_base_unit2;
  52 typedef bu::scaled_base_unit<base_unit4, bu::scale<10, bu::static_rational<3> > > scaled_base_unit4;
  53
  54 BOOST_UNITS_DEFINE_CONVERSION_FACTOR(base_unit1, scaled_base_unit2, double, 5);
  55 BOOST_UNITS_DEFINE_CONVERSION_FACTOR(scaled_base_unit2, base_unit3, double, 3);
  56
  57 int main()
  58 {
  59     BOOST_UNITS_CHECK_CLOSE(bu::conversion_factor(base_unit1::unit_type(), base_unit2::unit_type()), 5000);
  60     BOOST_UNITS_CHECK_CLOSE(bu::conversion_factor(base_unit2::unit_type(), base_unit3::unit_type()), 0.003);
  61     BOOST_UNITS_CHECK_CLOSE(bu::conversion_factor(scaled_base_unit2::unit_type(), base_unit2::unit_type()), 1000);
  62
  63     BOOST_UNITS_CHECK_CLOSE(bu::conversion_factor(base_unit4::unit_type()/base_unit5::unit_type(), scaled_base_unit4::unit_type()/base_unit5::unit_type()), 1e-3);
  64
  65     return boost::report_errors();
  66 }