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// Copyright Daniel James 2005. Use, modification, and distribution are
// subject to the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#include "./config.hpp"
#ifdef TEST_STD_INCLUDES
# include <functional>
#else
# include <boost/functional/hash/hash.hpp>
#endif
#define BOOST_AUTO_TEST_MAIN
#include <boost/test/auto_unit_test.hpp>
#include <cmath>
#include <boost/limits.hpp>
#include <iostream>
template <class T>
void float_tests(char const* name, T* = 0)
{
std::cout<<"\n"
"Testing " BOOST_STRINGIZE(HASH_NAMESPACE) "::hash<"<<name<<">\n"
"\n";
HASH_NAMESPACE::hash<T> x1;
T zero = 0;
T minus_zero = (T) -1 * zero;
BOOST_CHECK(zero == minus_zero);
BOOST_CHECK(x1(zero) == x1(minus_zero));
BOOST_CHECK(x1(zero) == HASH_NAMESPACE::hash_value(zero));
BOOST_CHECK(x1(minus_zero) == HASH_NAMESPACE::hash_value(minus_zero));
using namespace std;
// Doing anything with infinity causes borland to crash.
#if defined(__BORLANDC__)
std::cout<<"Not running infinity checks on Borland, as it causes it to crash.\n";
#else
if(std::numeric_limits<T>::has_infinity) {
T infinity = -log(zero);
T infinity2 = (T) 1. / zero;
T infinity3 = (T) -1. / minus_zero;
T infinity4 = std::numeric_limits<T>::infinity();
T minus_infinity = log(zero);
T minus_infinity2 = (T) -1. / zero;
T minus_infinity3 = (T) 1. / minus_zero;
BOOST_CHECK(x1(infinity) == HASH_NAMESPACE::hash_value(infinity));
BOOST_CHECK(x1(minus_infinity)
== HASH_NAMESPACE::hash_value(minus_infinity));
BOOST_CHECK(infinity == infinity2);
BOOST_CHECK(infinity == infinity3);
BOOST_CHECK(infinity == infinity4);
BOOST_CHECK(x1(infinity) == x1(infinity2));
BOOST_CHECK(x1(infinity) == x1(infinity3));
BOOST_CHECK(x1(infinity) == x1(infinity4));
BOOST_CHECK(minus_infinity == minus_infinity2);
BOOST_CHECK(x1(minus_infinity) == x1(minus_infinity2));
BOOST_CHECK(minus_infinity == minus_infinity3);
BOOST_CHECK(x1(minus_infinity) == x1(minus_infinity3));
BOOST_CHECK(infinity != minus_infinity);
// My hash fails this one, I guess it's not that bad.
if(x1(infinity) == x1(minus_infinity)) {
std::cout<<"x1(infinity) == x1(-infinity) == "<<x1(infinity)<<"\n";
}
// This should really be 'has_denorm == denorm_present' but some
// compilers don't have 'denorm_present'. See also a later use.
if(std::numeric_limits<T>::has_denorm) {
if(x1(std::numeric_limits<T>::denorm_min()) == x1(infinity)) {
std::cout<<"x1(denorm_min) == x1(infinity) == "<<x1(infinity)<<"\n";
}
if(x1(std::numeric_limits<T>::denorm_min()) == x1(minus_infinity)) {
std::cout<<"x1(denorm_min) == x1(-infinity) == "<<x1(minus_infinity)<<"\n";
}
}
if(std::numeric_limits<T>::has_quiet_NaN) {
if(x1(std::numeric_limits<T>::quiet_NaN()) == x1(infinity)) {
std::cout<<"x1(quiet_NaN) == x1(infinity) == "<<x1(infinity)<<"\n";
}
if(x1(std::numeric_limits<T>::quiet_NaN()) == x1(minus_infinity)) {
std::cout<<"x1(quiet_NaN) == x1(-infinity) == "<<x1(minus_infinity)<<"\n";
}
}
}
#endif
T max = (std::numeric_limits<T>::max)();
T half_max = max / 2;
T quarter_max = max / 4;
T three_quarter_max = max - quarter_max;
BOOST_CHECK(x1(max) == HASH_NAMESPACE::hash_value(max));
BOOST_CHECK(x1(half_max) == HASH_NAMESPACE::hash_value(half_max));
BOOST_CHECK(x1(quarter_max) == HASH_NAMESPACE::hash_value(quarter_max));
BOOST_CHECK(x1(three_quarter_max) == HASH_NAMESPACE::hash_value(three_quarter_max));
// The '!=' tests could legitimately fail, but with my hash it indicates a bug.
BOOST_CHECK(x1(max) == x1(max));
BOOST_CHECK(x1(max) != x1(quarter_max));
BOOST_CHECK(x1(max) != x1(half_max));
BOOST_CHECK(x1(max) != x1(three_quarter_max));
BOOST_CHECK(x1(quarter_max) == x1(quarter_max));
BOOST_CHECK(x1(quarter_max) != x1(half_max));
BOOST_CHECK(x1(quarter_max) != x1(three_quarter_max));
BOOST_CHECK(x1(half_max) == x1(half_max));
BOOST_CHECK(x1(half_max) != x1(three_quarter_max));
BOOST_CHECK(x1(three_quarter_max) == x1(three_quarter_max));
T v1 = asin((T) 1);
T v2 = acos((T) 0);
if(v1 == v2)
BOOST_CHECK(x1(v1) == x1(v2));
BOOST_CHECK(x1(v1) == HASH_NAMESPACE::hash_value(v1));
BOOST_CHECK(x1(v2) == HASH_NAMESPACE::hash_value(v2));
BOOST_CHECK(x1(std::numeric_limits<T>::epsilon()) != x1((T) 0));
BOOST_CHECK(x1(std::numeric_limits<T>::epsilon()) ==
HASH_NAMESPACE::hash_value(std::numeric_limits<T>::epsilon()));
// As before.
if(std::numeric_limits<T>::has_denorm) {
if(x1(std::numeric_limits<T>::denorm_min()) == x1(zero)) {
std::cout<<"x1(denorm_min) == x1(zero) == "<<x1(zero)<<"\n";
}
#if !BOOST_WORKAROUND(__DECCXX_VER,<70190006)
// The Tru64/CXX standard library prior to 7.1 contains a bug in the
// specialization of std::numeric_limits::denorm_min() for long
// doubles which causes this test to fail.
BOOST_CHECK_MESSAGE(x1(std::numeric_limits<T>::denorm_min()) ==
HASH_NAMESPACE::hash_value(std::numeric_limits<T>::denorm_min()),
"x1(std::numeric_limits<T>::denorm_min()) = "
<< x1(std::numeric_limits<T>::denorm_min())
<< "\nhash_value(std::numeric_limits<T>::denorm_min()) = "
<< HASH_NAMESPACE::hash_value(
std::numeric_limits<T>::denorm_min())
<< "\nx1(0) = "<<x1(0)<<"\n");
#endif
}
// NaN also causes borland to crash.
#if !defined(__BORLANDC__)
if(std::numeric_limits<T>::has_quiet_NaN) {
if(x1(std::numeric_limits<T>::quiet_NaN()) == x1(1.0)) {
std::cout<<"x1(quiet_NaN) == x1(1.0) == "<<x1(1.0)<<"\n";
}
BOOST_CHECK(x1(std::numeric_limits<T>::quiet_NaN()) ==
HASH_NAMESPACE::hash_value(std::numeric_limits<T>::quiet_NaN()));
}
#endif
}
BOOST_AUTO_UNIT_TEST(hash_float_tests)
{
std::cout<<"Compiler: "<<BOOST_COMPILER<<"\n";
std::cout<<"Platform: "<<BOOST_PLATFORM<<"\n";
std::cout<<"Library: "<<BOOST_STDLIB<<"\n\n";
float_tests("float", (float*) 0);
}
BOOST_AUTO_UNIT_TEST(hash_double_tests)
{
float_tests("double", (double*) 0);
}
BOOST_AUTO_UNIT_TEST(hash_long_double_tests)
{
float_tests("long double", (long double*) 0);
}
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