arb/mag/hypot.c
2014-12-20 22:37:43 +01:00

49 lines
1.4 KiB
C

/*=============================================================================
This file is part of ARB.
ARB 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.
ARB 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 ARB; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2014 Fredrik Johansson
******************************************************************************/
#include "mag.h"
void
mag_hypot(mag_t z, const mag_t x, const mag_t y)
{
if (mag_is_zero(y))
{
mag_set(z, x);
}
else if (mag_is_zero(x))
{
mag_set(z, y);
}
else
{
mag_t t;
mag_init(t);
mag_mul(t, x, x);
mag_addmul(t, y, y);
mag_sqrt(z, t);
mag_clear(t);
}
}