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/*
* This program source code file is part of KICAD, a free EDA CAD application.
*
* Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
* Copyright (C) CERN
* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
* This program 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.
*
* This program 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 this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef __MATH_UTIL_H
#define __MATH_UTIL_H
#include <stdint.h>
/**
* Function rescale()
*
* Scales a number (value) by rational (numerator/denominator). Numerator must be <= denominator.
*/
template <typename T>
T rescale( T aNumerator, T aValue, T aDenominator )
{
return aNumerator * aValue / aDenominator;
}
template <typename T>
int sign( T val )
{
return ( T( 0 ) < val) - ( val < T( 0 ) );
}
// explicit specializations for integer types, taking care of overflow.
template <>
int rescale( int aNumerator, int aValue, int aDenominator );
template <>
int64_t rescale( int64_t aNumerator, int64_t aValue, int64_t aDenominator );
#endif // __MATH_UTIL_H
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