kicad/pcb_calculator/transline/units.h

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/*
* units.h - some conversion definitions
*
* Copyright (C) 1992-2011 jean-pierre.charras
* Copyright (C) 1992-2011 Kicad Developers, see change_log.txt for contributors.
*
* 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 package; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef __UNITS_H
#define __UNITS_H
#include <math.h>
#include <units_scales.h>
#ifdef __MINGW32__
#define atanh(x) (0.5 * log((1.0 + (x)) / (1.0 - (x))))
#define asinh(x) log((x) + sqrt((x) * (x) + 1.0))
#define acosh(x) log((x) + sqrt((x) * (x) - 1.0))
#endif
#ifndef M_PI
#define M_PI 3.1415926535897932384626433832795029 /* pi */
#endif
#ifndef M_E
#define M_E 2.7182818284590452353602874713526625 /* e */
#endif
#define MU0 12.566370614e-7 // magnetic constant
#define C0 299792458.0 // speed of light in vacuum
#define ZF0 376.73031346958504364963 // wave resistance in vacuum
#endif /* __UNITS_H */