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cmp.hpp
/*
Copyright 2016 Statoil ASA.
This file is part of the Open Porous Media project (OPM).
OPM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OPM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OPM. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef COMMON_UTIL_NUMERIC_CMP
#define COMMON_UTIL_NUMERIC_CMP
#include <algorithm>
#include <cmath>
#include <cstddef>
#include <cstring>
#include <type_traits>
#include <vector>
namespace Opm {
namespace cmp {
const double default_abs_epsilon = 1e-8;
const double default_rel_epsilon = 1e-5;
template<typename T>
bool scalar_equal(T value1, T value2, T abs_eps , T rel_eps) {
static_assert(std::is_floating_point<T>::value, "Function scalar_equal() A can only be instantiated with floating point types");
bool equal = true;
T diff = std::fabs(value1 - value2);
if (diff > abs_eps) {
T scale = std::max(std::fabs(value1), std::fabs(value2));
if (diff > scale * rel_eps) {
equal = false;
}
}
return equal;
}
template<typename T>
bool scalar_equal(T value1, T value2) {
return scalar_equal<T>( value1 , value2 , default_abs_epsilon , default_rel_epsilon );
}
template<typename T>
bool vector_equal(const std::vector<T>& v1, const std::vector<T>& v2, T abs_eps, T rel_eps) {
if (v1.size() != v2.size()) {
return false;
}
for (size_t i = 0; i < v1.size(); i++) {
if (!scalar_equal<T>( v1[i], v2[i], abs_eps, rel_eps ))
return false;
}
return true;
}
template<typename T>
bool vector_equal(const std::vector<T>& v1, const std::vector<T>& v2) {
return vector_equal<T>(v1, v2, default_abs_epsilon, default_rel_epsilon);
}
template<typename T>
bool array_equal(const T* p1, const T* p2, size_t num_elements, T abs_eps, T rel_eps) {
if (std::memcmp(p1 , p2 , num_elements * sizeof * p1) == 0)
return true;
else {
size_t index;
for (index = 0; index < num_elements; index++) {
if (!scalar_equal<T>( p1[index] , p2[index] , abs_eps , rel_eps)) {
return false;
}
}
}
return true;
}
template<typename T>
bool array_equal(const T* p1, const T* p2, size_t num_elements) {
return array_equal<T>(p1, p2, num_elements , default_abs_epsilon, default_rel_epsilon);
}
}
}
#endif
Opm::cmp
In the namespace cmp are implemented functions for approximate comparison of double values based on a...
Definition cmp.hpp:64
Opm
This class implements a small container which holds the transmissibility mulitpliers for all the face...
Definition Exceptions.hpp:30