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/*
Copyright (C) 2013 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 "arb_poly.h"
void
_arb_poly_pow_ui(arb_ptr res, arb_srcptr f, slong flen, ulong exp, slong prec)
{
_arb_poly_pow_ui_trunc_binexp(res, f, flen, exp, exp * (flen - 1) + 1, prec);
}
void
arb_poly_pow_ui(arb_poly_t res,
const arb_poly_t poly, ulong exp, slong prec)
{
slong flen, rlen;
flen = poly->length;
if (exp == 0)
{
arb_poly_one(res);
}
else if (flen == 0)
{
arb_poly_zero(res);
}
else
{
rlen = exp * (flen - 1) + 1;
if (res != poly)
{
arb_poly_fit_length(res, rlen);
_arb_poly_pow_ui(res->coeffs,
poly->coeffs, flen, exp, prec);
_arb_poly_set_length(res, rlen);
_arb_poly_normalise(res);
}
else
{
arb_poly_t t;
arb_poly_init2(t, rlen);
_arb_poly_pow_ui(t->coeffs,
poly->coeffs, flen, exp, prec);
_arb_poly_set_length(t, rlen);
_arb_poly_normalise(t);
arb_poly_swap(res, t);
arb_poly_clear(t);
}
}
}
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