mirror of
https://github.com/OPM/opm-simulators.git
synced 2024-12-27 09:40:59 -06:00
46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
// vi: set et ts=4 sw=4 sts=4:
|
|
/*
|
|
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 2 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/>.
|
|
|
|
Consult the COPYING file in the top-level source directory of this
|
|
module for the precise wording of the license and the list of
|
|
copyright holders.
|
|
*/
|
|
/*!
|
|
* \file
|
|
* \copydoc sgn()
|
|
*/
|
|
#ifndef EWOMS_SIGNUM_HH
|
|
#define EWOMS_SIGNUM_HH
|
|
|
|
namespace Opm {
|
|
/*!
|
|
* \brief Template function which returns the sign of a floating point value
|
|
*
|
|
* This is a type safe and fast implementation of a sign() function for arbitrary
|
|
* floating point values. It a slightly modified variant of
|
|
*
|
|
* https://stackoverflow.com/questions/1903954/is-there-a-standard-sign-function-signum-sgn-in-c-c
|
|
*/
|
|
template <class Scalar>
|
|
int signum(Scalar val)
|
|
{ return (0 < val) - (val < 0); }
|
|
|
|
} // namespace Opm
|
|
|
|
#endif
|