Numeric.h

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// ************************************************************************** //
//
//  BornAgain: simulate and fit scattering at grazing incidence
//
//! @file      Fit/TestEngine/Numeric.h
//! @brief     Defines constants and "almost equal" in namespace Numeric.
//!
//! @homepage  http://www.bornagainproject.org
//! @license   GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors   Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************** //
 
#ifndef BORNAGAIN_FIT_TESTENGINE_NUMERIC_H
#define BORNAGAIN_FIT_TESTENGINE_NUMERIC_H
 
#include <limits>
 
//! Floating-point epsilon, tolerances, almost-equal.
 
namespace Numeric
{
 
double GetAbsoluteDifference(double a, double b);
 
double GetRelativeDifference(double a, double b);
 
double GetLogDifference(double a, double b);
 
} // namespace Numeric
 
#endif // BORNAGAIN_FIT_TESTENGINE_NUMERIC_H