ceph/src/boost/libs/math/test/test_classify.cpp

   1 //  Copyright John Maddock 2006.
   2 //  Copyright Paul A. Bristow 2007
   3 //  Use, modification and distribution are subject to the
   4 //  Boost Software License, Version 1.0. (See accompanying file
   5 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #include <pch.hpp>
   8
   9 #include <cmath>
  10 #include <math.h>
  11 #include <boost/limits.hpp>
  12 #include <boost/math/concepts/real_concept.hpp>
  13 #include <boost/math/special_functions/fpclassify.hpp>
  14 #define BOOST_TEST_MAIN
  15 #include <boost/test/unit_test.hpp>
  16 #include <iostream>
  17 #include <iomanip>
  18
  19 #ifdef _MSC_VER
  20 #pragma warning(disable: 4127 4146) //  conditional expression is constant
  21 #endif
  22
  23 const char* method_name(const boost::math::detail::native_tag&)
  24 {
  25    return "Native";
  26 }
  27
  28 const char* method_name(const boost::math::detail::generic_tag<true>&)
  29 {
  30    return "Generic (with numeric limits)";
  31 }
  32
  33 const char* method_name(const boost::math::detail::generic_tag<false>&)
  34 {
  35    return "Generic (without numeric limits)";
  36 }
  37
  38 const char* method_name(const boost::math::detail::ieee_tag&)
  39 {
  40    return "IEEE std";
  41 }
  42
  43 const char* method_name(const boost::math::detail::ieee_copy_all_bits_tag&)
  44 {
  45    return "IEEE std, copy all bits";
  46 }
  47
  48 const char* method_name(const boost::math::detail::ieee_copy_leading_bits_tag&)
  49 {
  50    return "IEEE std, copy leading bits";
  51 }
  52
  53 template <class T>
  54 void test_classify(T t, const char* type)
  55 {
  56    std::cout << "Testing type " << type << std::endl;
  57
  58    typedef typename boost::math::detail::fp_traits<T>::type traits;
  59    typedef typename traits::method method;
  60
  61    std::cout << "Evaluation method = " << method_name(method()) << std::endl;
  62
  63    t = 2;
  64    T u = 2;
  65    BOOST_CHECK_EQUAL((::boost::math::fpclassify)(t), (int)FP_NORMAL);
  66    BOOST_CHECK_EQUAL((::boost::math::fpclassify)(-t), (int)FP_NORMAL);
  67    BOOST_CHECK_EQUAL((::boost::math::isfinite)(t), true);
  68    BOOST_CHECK_EQUAL((::boost::math::isfinite)(-t), true);
  69    BOOST_CHECK_EQUAL((::boost::math::isinf)(t), false);
  70    BOOST_CHECK_EQUAL((::boost::math::isinf)(-t), false);
  71    BOOST_CHECK_EQUAL((::boost::math::isnan)(t), false);
  72    BOOST_CHECK_EQUAL((::boost::math::isnan)(-t), false);
  73    BOOST_CHECK_EQUAL((::boost::math::isnormal)(t), true);
  74    BOOST_CHECK_EQUAL((::boost::math::isnormal)(-t), true);
  75    if(std::numeric_limits<T>::is_specialized)
  76    {
  77       t = (std::numeric_limits<T>::max)();
  78       BOOST_CHECK_EQUAL((::boost::math::fpclassify)(t), (int)FP_NORMAL);
  79       BOOST_CHECK_EQUAL((::boost::math::fpclassify)(-t), (int)FP_NORMAL);
  80       BOOST_CHECK_EQUAL((::boost::math::isfinite)(t), true);
  81       BOOST_CHECK_EQUAL((::boost::math::isfinite)(-t), true);
  82       BOOST_CHECK_EQUAL((::boost::math::isinf)(t), false);
  83       BOOST_CHECK_EQUAL((::boost::math::isinf)(-t), false);
  84       BOOST_CHECK_EQUAL((::boost::math::isnan)(t), false);
  85       BOOST_CHECK_EQUAL((::boost::math::isnan)(-t), false);
  86       BOOST_CHECK_EQUAL((::boost::math::isnormal)(t), true);
  87       BOOST_CHECK_EQUAL((::boost::math::isnormal)(-t), true);
  88       t = (std::numeric_limits<T>::min)();
  89       if(t != 0)
  90       {
  91          BOOST_CHECK_EQUAL((::boost::math::fpclassify)(t), (int)FP_NORMAL);
  92          BOOST_CHECK_EQUAL((::boost::math::fpclassify)(-t), (int)FP_NORMAL);
  93          BOOST_CHECK_EQUAL((::boost::math::isfinite)(t), true);
  94          BOOST_CHECK_EQUAL((::boost::math::isfinite)(-t), true);
  95          BOOST_CHECK_EQUAL((::boost::math::isinf)(t), false);
  96          BOOST_CHECK_EQUAL((::boost::math::isinf)(-t), false);
  97          BOOST_CHECK_EQUAL((::boost::math::isnan)(t), false);
  98          BOOST_CHECK_EQUAL((::boost::math::isnan)(-t), false);
  99          BOOST_CHECK_EQUAL((::boost::math::isnormal)(t), true);
 100          BOOST_CHECK_EQUAL((::boost::math::isnormal)(-t), true);
 101       }
 102    }
 103    if(std::numeric_limits<T>::has_denorm)
 104    {
 105       t = (std::numeric_limits<T>::min)();
 106       t /= 2;
 107       if(t != 0)
 108       {
 109          BOOST_CHECK_EQUAL((::boost::math::fpclassify)(t), (int)FP_SUBNORMAL);
 110          BOOST_CHECK_EQUAL((::boost::math::fpclassify)(-t), (int)FP_SUBNORMAL);
 111          BOOST_CHECK_EQUAL((::boost::math::isfinite)(t), true);
 112          BOOST_CHECK_EQUAL((::boost::math::isfinite)(-t), true);
 113          BOOST_CHECK_EQUAL((::boost::math::isinf)(t), false);
 114          BOOST_CHECK_EQUAL((::boost::math::isinf)(-t), false);
 115          BOOST_CHECK_EQUAL((::boost::math::isnan)(t), false);
 116          BOOST_CHECK_EQUAL((::boost::math::isnan)(-t), false);
 117          BOOST_CHECK_EQUAL((::boost::math::isnormal)(t), false);
 118          BOOST_CHECK_EQUAL((::boost::math::isnormal)(-t), false);
 119       }
 120       t = std::numeric_limits<T>::denorm_min();
 121       if((t != 0) && (t < (std::numeric_limits<T>::min)()))
 122       {
 123          BOOST_CHECK_EQUAL((::boost::math::fpclassify)(t), (int)FP_SUBNORMAL);
 124          BOOST_CHECK_EQUAL((::boost::math::fpclassify)(-t), (int)FP_SUBNORMAL);
 125          BOOST_CHECK_EQUAL((::boost::math::isfinite)(t), true);
 126          BOOST_CHECK_EQUAL((::boost::math::isfinite)(-t), true);
 127          BOOST_CHECK_EQUAL((::boost::math::isinf)(t), false);
 128          BOOST_CHECK_EQUAL((::boost::math::isinf)(-t), false);
 129          BOOST_CHECK_EQUAL((::boost::math::isnan)(t), false);
 130          BOOST_CHECK_EQUAL((::boost::math::isnan)(-t), false);
 131          BOOST_CHECK_EQUAL((::boost::math::isnormal)(t), false);
 132          BOOST_CHECK_EQUAL((::boost::math::isnormal)(-t), false);
 133       }
 134    }
 135    else
 136    {
 137       std::cout << "Denormalised forms not tested" << std::endl;
 138    }
 139    t = 0;
 140    BOOST_CHECK_EQUAL((::boost::math::fpclassify)(t), (int)FP_ZERO);
 141    BOOST_CHECK_EQUAL((::boost::math::fpclassify)(-t), (int)FP_ZERO);
 142    BOOST_CHECK_EQUAL((::boost::math::isfinite)(t), true);
 143    BOOST_CHECK_EQUAL((::boost::math::isfinite)(-t), true);
 144    BOOST_CHECK_EQUAL((::boost::math::isinf)(t), false);
 145    BOOST_CHECK_EQUAL((::boost::math::isinf)(-t), false);
 146    BOOST_CHECK_EQUAL((::boost::math::isnan)(t), false);
 147    BOOST_CHECK_EQUAL((::boost::math::isnan)(-t), false);
 148    BOOST_CHECK_EQUAL((::boost::math::isnormal)(t), false);
 149    BOOST_CHECK_EQUAL((::boost::math::isnormal)(-t), false);
 150    t /= -u; // create minus zero if it exists
 151    BOOST_CHECK_EQUAL((::boost::math::fpclassify)(t), (int)FP_ZERO);
 152    BOOST_CHECK_EQUAL((::boost::math::fpclassify)(-t), (int)FP_ZERO);
 153    BOOST_CHECK_EQUAL((::boost::math::isfinite)(t), true);
 154    BOOST_CHECK_EQUAL((::boost::math::isfinite)(-t), true);
 155    BOOST_CHECK_EQUAL((::boost::math::isinf)(t), false);
 156    BOOST_CHECK_EQUAL((::boost::math::isinf)(-t), false);
 157    BOOST_CHECK_EQUAL((::boost::math::isnan)(t), false);
 158    BOOST_CHECK_EQUAL((::boost::math::isnan)(-t), false);
 159    BOOST_CHECK_EQUAL((::boost::math::isnormal)(t), false);
 160    BOOST_CHECK_EQUAL((::boost::math::isnormal)(-t), false);
 161    // infinity:
 162    if(std::numeric_limits<T>::has_infinity)
 163    {
 164       // At least one std::numeric_limits<T>::infinity)() returns zero
 165       // (Compaq true64 cxx), hence the check.
 166       t = (std::numeric_limits<T>::infinity)();
 167       BOOST_CHECK_EQUAL((::boost::math::fpclassify)(t), (int)FP_INFINITE);
 168       BOOST_CHECK_EQUAL((::boost::math::fpclassify)(-t), (int)FP_INFINITE);
 169       BOOST_CHECK_EQUAL((::boost::math::isfinite)(t), false);
 170       BOOST_CHECK_EQUAL((::boost::math::isfinite)(-t), false);
 171       BOOST_CHECK_EQUAL((::boost::math::isinf)(t), true);
 172       BOOST_CHECK_EQUAL((::boost::math::isinf)(-t), true);
 173       BOOST_CHECK_EQUAL((::boost::math::isnan)(t), false);
 174       BOOST_CHECK_EQUAL((::boost::math::isnan)(-t), false);
 175       BOOST_CHECK_EQUAL((::boost::math::isnormal)(t), false);
 176       BOOST_CHECK_EQUAL((::boost::math::isnormal)(-t), false);
 177 #if !defined(__BORLANDC__) && !(defined(__DECCXX) && !defined(_IEEE_FP))
 178       // divide by zero on Borland triggers a C++ exception :-(
 179       // divide by zero on Compaq CXX triggers a C style signal :-(
 180       t = 2;
 181       u = 0;
 182       t /= u;
 183       BOOST_CHECK_EQUAL((::boost::math::fpclassify)(t), (int)FP_INFINITE);
 184       BOOST_CHECK_EQUAL((::boost::math::fpclassify)(-t), (int)FP_INFINITE);
 185       BOOST_CHECK_EQUAL((::boost::math::isfinite)(t), false);
 186       BOOST_CHECK_EQUAL((::boost::math::isfinite)(-t), false);
 187       BOOST_CHECK_EQUAL((::boost::math::isinf)(t), true);
 188       BOOST_CHECK_EQUAL((::boost::math::isinf)(-t), true);
 189       BOOST_CHECK_EQUAL((::boost::math::isnan)(t), false);
 190       BOOST_CHECK_EQUAL((::boost::math::isnan)(-t), false);
 191       BOOST_CHECK_EQUAL((::boost::math::isnormal)(t), false);
 192       BOOST_CHECK_EQUAL((::boost::math::isnormal)(-t), false);
 193       t = -2;
 194       t /= u;
 195       BOOST_CHECK_EQUAL((::boost::math::fpclassify)(t), (int)FP_INFINITE);
 196       BOOST_CHECK_EQUAL((::boost::math::fpclassify)(-t), (int)FP_INFINITE);
 197       BOOST_CHECK_EQUAL((::boost::math::isfinite)(t), false);
 198       BOOST_CHECK_EQUAL((::boost::math::isfinite)(-t), false);
 199       BOOST_CHECK_EQUAL((::boost::math::isinf)(t), true);
 200       BOOST_CHECK_EQUAL((::boost::math::isinf)(-t), true);
 201       BOOST_CHECK_EQUAL((::boost::math::isnan)(t), false);
 202       BOOST_CHECK_EQUAL((::boost::math::isnan)(-t), false);
 203       BOOST_CHECK_EQUAL((::boost::math::isnormal)(t), false);
 204       BOOST_CHECK_EQUAL((::boost::math::isnormal)(-t), false);
 205 #else
 206       std::cout << "Infinities from divide by zero not tested" << std::endl;
 207 #endif
 208    }
 209    else
 210    {
 211       std::cout << "Infinity not tested" << std::endl;
 212    }
 213 #ifndef __BORLANDC__
 214    // NaN's:
 215    // Note that Borland throws an exception if we even try to obtain a Nan
 216    // by calling std::numeric_limits<T>::quiet_NaN() !!!!!!!
 217    if(std::numeric_limits<T>::has_quiet_NaN)
 218    {
 219       t = std::numeric_limits<T>::quiet_NaN();
 220       BOOST_CHECK_EQUAL((::boost::math::fpclassify)(t), (int)FP_NAN);
 221       BOOST_CHECK_EQUAL((::boost::math::fpclassify)(-t), (int)FP_NAN);
 222       BOOST_CHECK_EQUAL((::boost::math::isfinite)(t), false);
 223       BOOST_CHECK_EQUAL((::boost::math::isfinite)(-t), false);
 224       BOOST_CHECK_EQUAL((::boost::math::isinf)(t), false);
 225       BOOST_CHECK_EQUAL((::boost::math::isinf)(-t), false);
 226       BOOST_CHECK_EQUAL((::boost::math::isnan)(t), true);
 227       BOOST_CHECK_EQUAL((::boost::math::isnan)(-t), true);
 228       BOOST_CHECK_EQUAL((::boost::math::isnormal)(t), false);
 229       BOOST_CHECK_EQUAL((::boost::math::isnormal)(-t), false);
 230    }
 231    else
 232    {
 233       std::cout << "Quiet NaN's not tested" << std::endl;
 234    }
 235    if(std::numeric_limits<T>::has_signaling_NaN)
 236    {
 237       t = std::numeric_limits<T>::signaling_NaN();
 238       BOOST_CHECK_EQUAL((::boost::math::fpclassify)(t), (int)FP_NAN);
 239       BOOST_CHECK_EQUAL((::boost::math::fpclassify)(-t), (int)FP_NAN);
 240       BOOST_CHECK_EQUAL((::boost::math::isfinite)(t), false);
 241       BOOST_CHECK_EQUAL((::boost::math::isfinite)(-t), false);
 242       BOOST_CHECK_EQUAL((::boost::math::isinf)(t), false);
 243       BOOST_CHECK_EQUAL((::boost::math::isinf)(-t), false);
 244       BOOST_CHECK_EQUAL((::boost::math::isnan)(t), true);
 245       BOOST_CHECK_EQUAL((::boost::math::isnan)(-t), true);
 246       BOOST_CHECK_EQUAL((::boost::math::isnormal)(t), false);
 247       BOOST_CHECK_EQUAL((::boost::math::isnormal)(-t), false);
 248    }
 249    else
 250    {
 251       std::cout << "Signaling NaN's not tested" << std::endl;
 252    }
 253 #endif
 254 }
 255
 256 BOOST_AUTO_TEST_CASE( test_main )
 257 {
 258    BOOST_MATH_CONTROL_FP;
 259    // start by printing some information:
 260 #ifdef isnan
 261    std::cout << "Platform has isnan macro." << std::endl;
 262 #endif
 263 #ifdef fpclassify
 264    std::cout << "Platform has fpclassify macro." << std::endl;
 265 #endif
 266 #ifdef BOOST_HAS_FPCLASSIFY
 267    std::cout << "Platform has FP_NORMAL macro." << std::endl;
 268 #endif
 269    std::cout << "FP_ZERO: " << (int)FP_ZERO << std::endl;
 270    std::cout << "FP_NORMAL: " << (int)FP_NORMAL << std::endl;
 271    std::cout << "FP_INFINITE: " << (int)FP_INFINITE << std::endl;
 272    std::cout << "FP_NAN: " << (int)FP_NAN << std::endl;
 273    std::cout << "FP_SUBNORMAL: " << (int)FP_SUBNORMAL << std::endl;
 274
 275    // then run the tests:
 276    test_classify(float(0), "float");
 277    test_classify(double(0), "double");
 278    // long double support for fpclassify is considered "core" so we always test it
 279    // even when long double support is turned off via BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
 280    test_classify((long double)(0), "long double");
 281    test_classify((boost::math::concepts::real_concept)(0), "real_concept");
 282
 283    // We should test with integer types as well:
 284    test_classify(int(0), "int");
 285    test_classify(unsigned(0), "unsigned");
 286 }
 287
 288 /*
 289 Autorun "i:\Boost-sandbox\math_toolkit\libs\math\test\MSVC80\debug\test_classify.exe"
 290 Running 1 test case...
 291 FP_ZERO: 0
 292 FP_NORMAL: 1
 293 FP_INFINITE: 2
 294 FP_NAN: 3
 295 FP_SUBNORMAL: 4
 296 Testing type float
 297 Testing type double
 298 Testing type long double
 299 Testing type real_concept
 300 Denormalised forms not tested
 301 Infinity not tested
 302 Quiet NaN's not tested
 303 Signaling NaN's not tested
 304 Test suite "Test Program" passed with:
 305   79 assertions out of 79 passed
 306   1 test case out of 1 passed
 307   Test case "test_main_caller( argc, argv )" passed with:
 308     79 assertions out of 79 passed
 309
 310 */