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/*
Copyright (C) 2014 Fredrik Johansson
This file is part of Arb.
Arb is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "flint/double_extras.h"
#include "mag.h"
double
mag_get_d(const mag_t z)
{
if (mag_is_zero(z))
{
return 0.0;
}
else if (mag_is_inf(z))
{
return D_INF;
}
else if (MAG_EXP(z) < -1000 || MAG_EXP(z) > 1000)
{
if (fmpz_sgn(MAG_EXPREF(z)) < 0)
return ldexp(1.0, -1000);
else
return D_INF;
}
else
{
return ldexp(MAG_MAN(z), MAG_EXP(z) - MAG_BITS);
}
}
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