ceph/src/boost/libs/test/include/boost/test/tools/fpc_tolerance.hpp

   1 //  (C) Copyright Gennadiy Rozental 2001.
   2 //  Distributed under the Boost Software License, Version 1.0.
   3 //  (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  See http://www.boost.org/libs/test for the library home page.
   7 //
   8 //  File        : $RCSfile$
   9 //
  10 //  Version     : $Revision: 74248 $
  11 //
  12 //  Description : FPC tools tolerance holder
  13 // ***************************************************************************
  14
  15 #ifndef BOOST_TEST_TOOLS_FPC_TOLERANCE_HPP_121612GER
  16 #define BOOST_TEST_TOOLS_FPC_TOLERANCE_HPP_121612GER
  17
  18 // Boost Test
  19 #include <boost/test/tree/decorator.hpp>
  20 #include <boost/test/tools/floating_point_comparison.hpp>
  21
  22 #include <boost/test/detail/suppress_warnings.hpp>
  23
  24 //____________________________________________________________________________//
  25
  26 namespace boost {
  27 namespace test_tools {
  28
  29 namespace fpc = math::fpc;
  30
  31 // ************************************************************************** //
  32 // **************     floating point comparison tolerance      ************** //
  33 // ************************************************************************** //
  34
  35 template<typename FPT>
  36 inline FPT&
  37 fpc_tolerance()
  38 {
  39     static FPT s_value = 0;
  40     return s_value;
  41 }
  42
  43 //____________________________________________________________________________//
  44
  45 template<typename FPT>
  46 struct local_fpc_tolerance {
  47     local_fpc_tolerance( FPT fraction_tolerance ) : m_old_tolerance( fpc_tolerance<FPT>() )
  48     {
  49         fpc_tolerance<FPT>() = fraction_tolerance;
  50     }
  51
  52     ~local_fpc_tolerance()
  53     {
  54         if( m_old_tolerance != (FPT)-1 )
  55             fpc_tolerance<FPT>() = m_old_tolerance;
  56     }
  57
  58 private:
  59     // Data members
  60     FPT         m_old_tolerance;
  61 };
  62
  63 //____________________________________________________________________________//
  64
  65 } // namespace test_tools
  66
  67 // ************************************************************************** //
  68 // **************             decorator::tolerance             ************** //
  69 // ************************************************************************** //
  70
  71 namespace unit_test {
  72 namespace decorator {
  73
  74 template<typename FPT>
  75 inline fixture_t
  76 tolerance( FPT v )
  77 {
  78     return fixture_t( test_unit_fixture_ptr(
  79         new unit_test::class_based_fixture<test_tools::local_fpc_tolerance<FPT>,FPT>( v ) ) );
  80 }
  81
  82 //____________________________________________________________________________//
  83
  84 template<typename FPT>
  85 inline fixture_t
  86 tolerance( test_tools::fpc::percent_tolerance_t<FPT> v )
  87 {
  88     return fixture_t( test_unit_fixture_ptr(
  89         new unit_test::class_based_fixture<test_tools::local_fpc_tolerance<FPT>,FPT>( boost::math::fpc::fpc_detail::fraction_tolerance<FPT>( v ) ) ) );
  90 }
  91
  92 //____________________________________________________________________________//
  93
  94 } // namespace decorator
  95
  96 using decorator::tolerance;
  97
  98 } // namespace unit_test
  99 } // namespace boost
 100
 101 #include <boost/test/detail/enable_warnings.hpp>
 102
 103 #endif // BOOST_TEST_TOOLS_FPC_TOLERANCE_HPP_121612GER