mirror of
https://github.com/vale981/arb
synced 2025-03-05 09:21:38 -05:00
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
|
/*
|
||
|
|
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 "acb_poly.h"
|
||
|
|
|
||
|
|
void
|
||
|
|
_acb_poly_binomial_transform(acb_ptr b, acb_srcptr a, slong alen, slong len, slong prec)
|
||
|
|
{
|
||
|
|
if (alen < 10 || len < 10)
|
||
|
|
_acb_poly_binomial_transform_basecase(b, a, alen, len, prec);
|
||
|
|
else
|
||
|
|
_acb_poly_binomial_transform_convolution(b, a, alen, len, prec);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
acb_poly_binomial_transform(acb_poly_t b, const acb_poly_t a, slong len, slong prec)
|
||
|
|
{
|
||
|
|
if (len == 0 || a->length == 0)
|
||
|
|
{
|
||
|
|
acb_poly_zero(b);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (b == a)
|
||
|
|
{
|
||
|
|
acb_poly_t c;
|
||
|
|
acb_poly_init2(c, len);
|
||
|
|
_acb_poly_binomial_transform(c->coeffs, a->coeffs, a->length, len, prec);
|
||
|
|
acb_poly_swap(b, c);
|
||
|
|
acb_poly_clear(c);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
acb_poly_fit_length(b, len);
|
||
|
|
_acb_poly_binomial_transform(b->coeffs, a->coeffs, a->length, len, prec);
|
||
|
|
}
|
||
|
|
|
||
|
|
_acb_poly_set_length(b, len);
|
||
|
|
_acb_poly_normalise(b);
|
||
|
|
}
|
||
|
|
|