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/*
Copyright (C) 2012 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 "fmpr.h"
slong
fmpr_log(fmpr_t y, const fmpr_t x, slong prec, fmpr_rnd_t rnd)
{
if (fmpr_is_special(x))
{
if (fmpr_is_zero(x))
fmpr_neg_inf(y);
else if (fmpr_is_pos_inf(x))
fmpr_pos_inf(y);
else
fmpr_nan(y);
return FMPR_RESULT_EXACT;
}
else if (fmpr_sgn(x) < 0)
{
fmpr_nan(y);
return FMPR_RESULT_EXACT;
}
else if (fmpr_is_one(x))
{
fmpr_zero(y);
return FMPR_RESULT_EXACT;
}
else
{
slong r;
CALL_MPFR_FUNC(r, mpfr_log, y, x, prec, rnd);
return r;
}
}
slong
fmpr_log1p(fmpr_t y, const fmpr_t x, slong prec, fmpr_rnd_t rnd)
{
if (fmpr_is_special(x))
{
if (fmpr_is_zero(x))
fmpr_zero(y);
else if (fmpr_is_pos_inf(x))
fmpr_pos_inf(y);
else
fmpr_nan(y);
return FMPR_RESULT_EXACT;
}
else
{
slong r;
CALL_MPFR_FUNC(r, mpfr_log1p, y, x, prec, rnd);
return r;
}
}
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