52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
/*
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* This program source code file is part of KICAD, a free EDA CAD application.
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*
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* Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
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* Copyright (C) CERN
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* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef __MATH_UTIL_H
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#define __MATH_UTIL_H
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#include <stdint.h>
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/**
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* Function rescale()
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*
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* Scales a number (value) by rational (numerator/denominator). Numerator must be <= denominator.
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*/
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template <typename T>
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T rescale( T aNumerator, T aValue, T aDenominator )
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{
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return aNumerator * aValue / aDenominator;
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}
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// explicit specializations for integer types, taking care of overflow.
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template <>
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int rescale( int aNumerator, int aValue, int aDenominator );
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template <>
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int64_t rescale( int64_t aNumerator, int64_t aValue, int64_t aDenominator );
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#endif // __MATH_UTIL_H
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