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// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
// SPDX-FileCopyrightInfo: Copyright © DUNE Project contributors, see file LICENSE.md in module root
// SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
// Test the new (Dune) interface of float_cmp
#include <iostream>
#include <dune/common/float_cmp.hh>
using std::cout;
using std::endl;
using std::flush;
/////////////////////////
//
// compile time checks
//
// check that we can access the functions as FloatCmp::function from within the Dune namespace
namespace Dune {
void checkNamespaceAccess() {
FloatCmp::eq(0.0, 0.0);
}
} // namespace Dune
// check that we can access the functions as FloatCmp::function with using namespace Dune
void checkUsingAccess() {
using namespace Dune;
FloatCmp::eq(0.0, 0.0);
}
// run time checks
const char* repr(bool b) {
if(b) return "true ";
else return "false";
}
int passed = 0;
int failed = 0;
void count(bool pass) {
if(pass) { cout << "passed"; ++passed; }
else { cout << "failed"; ++failed; }
}
template<typename F>
void tests(F f1, F f2, typename Dune::FloatCmp::EpsilonType<F>::Type eps, bool inside)
{
bool result;
cout << "eq(" << f1 << ", " << f2 << ", " << eps << ") = " << flush;
result = Dune::FloatCmp::eq(f1, f2, eps);
cout << repr(result) << "\t";
count(result == inside);
cout << endl;
cout << "ge(" << f1 << ", " << f2 << ", " << eps << ") = " << flush;
result = Dune::FloatCmp::ge(f1, f2, eps);
cout << repr(result) << "\t";
count(result == (inside || f1 > f2));
cout << endl;
cout << "le(" << f1 << ", " << f2 << ", " << eps << ") = " << flush;
result = Dune::FloatCmp::le(f1, f2, eps);
cout << repr(result) << "\t";
count(result == (inside || f1 < f2));
cout << endl;
cout << "ne(" << f1 << ", " << f2 << ", " << eps << ") = " << flush;
result = Dune::FloatCmp::ne(f1, f2, eps);
cout << repr(result) << "\t";
count(result == !inside);
cout << endl;
cout << "gt(" << f1 << ", " << f2 << ", " << eps << ") = " << flush;
result = Dune::FloatCmp::gt(f1, f2, eps);
cout << repr(result) << "\t";
count(result == (!inside && f1 > f2));
cout << endl;
cout << "lt(" << f1 << ", " << f2 << ", " << eps << ") = " << flush;
result = Dune::FloatCmp::lt(f1, f2, eps);
cout << repr(result) << "\t";
count(result == (!inside && f1 < f2));
cout << endl;
}
template<typename F>
void vectortests(F f1, F f2, typename Dune::FloatCmp::EpsilonType<F>::Type eps, bool inside)
{
bool result;
cout << "eq({" << f1[0] << ", " << f1[1] << "}, {"
<< f2[0] << ", " << f2[1] << "}, " << eps << ") = " << flush;
result = Dune::FloatCmp::eq(f1, f2, eps);
cout << repr(result) << "\t";
count(result == inside);
cout << endl;
cout << "ne({" << f1[0] << ", " << f1[1] << "}, {"
<< f2[0] << ", " << f2[1] << "}, " << eps << ") = " << flush;
result = Dune::FloatCmp::ne(f1, f2, eps);
cout << repr(result) << "\t";
count(result == !inside);
cout << endl;
}
template<typename F>
void tests(F f1, F f2, const typename Dune::FloatCmpOps<F> &ops, bool inside)
{
bool result;
cout << "ops = operations(" << ops.epsilon() << ")" << endl;
cout << "ops.eq(" << f1 << ", " << f2 << ") = " << flush;
result = ops.eq(f1, f2);
cout << repr(result) << "\t";
count(result == inside);
cout << endl;
cout << "ops.ge(" << f1 << ", " << f2 << ") = " << flush;
result = ops.ge(f1, f2);
cout << repr(result) << "\t";
count(result == (inside || f1 > f2));
cout << endl;
cout << "ops.le(" << f1 << ", " << f2 << ") = " << flush;
result = ops.le(f1, f2);
cout << repr(result) << "\t";
count(result == (inside || f1 < f2));
cout << endl;
cout << "ops.ne(" << f1 << ", " << f2 << ") = " << flush;
result = ops.ne(f1, f2);
cout << repr(result) << "\t";
count(result == !inside);
cout << endl;
cout << "ops.gt(" << f1 << ", " << f2 << ") = " << flush;
result = ops.gt(f1, f2);
cout << repr(result) << "\t";
count(result == (!inside && f1 > f2));
cout << endl;
cout << "ops.lt(" << f1 << ", " << f2 << ") = " << flush;
result = ops.lt(f1, f2);
cout << repr(result) << "\t";
count(result == (!inside && f1 < f2));
cout << endl;
}
template<typename F>
void vectortests(F f1, F f2, typename Dune::FloatCmpOps<F> &ops, bool inside)
{
bool result;
cout << "ops = operations(" << ops.epsilon() << ")" << endl;
cout << "ops.eq({" << f1[0] << ", " << f1[1] << "}, {"
<< f2[0] << ", " << f2[1] << "}) = " << flush;
result = ops.eq(f1, f2);
cout << repr(result) << "\t";
count(result == inside);
cout << endl;
cout << "ops.ne({" << f1[0] << ", " << f1[1] << "}, {"
<< f2[0] << ", " << f2[1] << "}) = " << flush;
result = ops.ne(f1, f2);
cout << repr(result) << "\t";
count(result == !inside);
cout << endl;
}
int main() {
cout.setf(std::ios_base::scientific, std::ios_base::floatfield);
cout.precision(16);
Dune::FloatCmpOps<double> ops(1e-7);
Dune::FloatCmpOps<std::vector<double>> std_vec_ops(1e-7);
Dune::FloatCmpOps<Dune::FieldVector<double,2>> fvec_ops(1e-7);
cout << "Tests inside the epsilon environment" << endl;
tests<double>(1.0, 1.00000001, 1e-7, true);
tests<double>(1.0, 1.00000001, ops, true);
vectortests(std::vector<double>({1.0, 1.0}), std::vector<double>({1.00000001, 1.0}), 1e-7, true);
vectortests(std::vector<double>({1.0, 1.0}), std::vector<double>({1.00000001, 1.0}), std_vec_ops, true);
vectortests(Dune::FieldVector<double,2>({1.0, 1.0}), Dune::FieldVector<double,2>({1.00000001, 1.0}), 1e-7, true);
vectortests(Dune::FieldVector<double,2>({1.0, 1.0}), Dune::FieldVector<double,2>({1.00000001, 1.0}), fvec_ops, true);
cout << "Tests outside the epsilon environment, f1 < f2" << endl;
tests<double>(1.0, 1.000001, 1e-7, false);
tests<double>(1.0, 1.000001, ops, false);
vectortests(std::vector<double>({1.0, 1.0}), std::vector<double>({1.000001, 1.0}), 1e-7, false);
vectortests(std::vector<double>({1.0, 1.0}), std::vector<double>({1.000001, 1.0}), std_vec_ops, false);
vectortests(Dune::FieldVector<double,2>({1.0, 1.0}), Dune::FieldVector<double,2>({1.000001, 1.0}), 1e-7, false);
vectortests(Dune::FieldVector<double,2>({1.0, 1.0}), Dune::FieldVector<double,2>({1.000001, 1.0}), fvec_ops, false);
cout << "Tests outside the epsilon environment, f1 > f2" << endl;
tests<double>(1.000001, 1.0, 1e-7, false);
tests<double>(1.000001, 1.0, ops, false);
vectortests(std::vector<double>({1.000001, 1.0}), std::vector<double>({1.0, 1.0}), 1e-7, false);
vectortests(std::vector<double>({1.000001, 1.0}), std::vector<double>({1.0, 1.0}), std_vec_ops, false);
vectortests(Dune::FieldVector<double,2>({1.000001, 1.0}), Dune::FieldVector<double,2>({1.0, 1.0}), 1e-7, false);
vectortests(Dune::FieldVector<double,2>({1.000001, 1.0}), Dune::FieldVector<double,2>({1.0, 1.0}), fvec_ops, false);
cout << "Tests with f1 = f2 = 0" << endl;
tests<double>(0, 0, 1e-7, true);
tests<double>(0, 0, ops, true);
vectortests(std::vector<double>({0, 0}), std::vector<double>({0, 0}), 1e-7, true);
vectortests(std::vector<double>({0, 0}), std::vector<double>({0, 0}), std_vec_ops, true);
vectortests(Dune::FieldVector<double,2>({0, 0}), Dune::FieldVector<double,2>({0, 0}), 1e-7, true);
vectortests(Dune::FieldVector<double,2>({0, 0}), Dune::FieldVector<double,2>({0, 0}), fvec_ops, true);
int total = passed + failed;
cout << passed << "/" << total << " tests passed; " << failed << "/" << total << " tests failed" << endl;
if(failed > 0) return 1;
else return 0;
}
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