mirror of
https://github.com/vale981/arb
synced 2025-03-06 01:41:39 -05:00
60 lines
1.7 KiB
C
60 lines
1.7 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) 2016 Fredrik Johansson
|
||
|
|
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
#include "acb_poly.h"
|
||
|
|
|
||
|
|
void
|
||
|
|
_acb_poly_taylor_shift_divconquer(acb_ptr poly, const acb_t c, slong len, slong prec)
|
||
|
|
{
|
||
|
|
acb_struct d[2];
|
||
|
|
|
||
|
|
if (len <= 1 || acb_is_zero(c))
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (len == 2)
|
||
|
|
{
|
||
|
|
acb_addmul(poly, poly + 1, c, prec);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
d[0] = *c;
|
||
|
|
|
||
|
|
acb_init(d + 1);
|
||
|
|
acb_one(d + 1); /* no need to free */
|
||
|
|
|
||
|
|
_acb_poly_compose_divconquer(poly, poly, len, d, 2, prec);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
acb_poly_taylor_shift_divconquer(acb_poly_t g, const acb_poly_t f,
|
||
|
|
const acb_t c, slong prec)
|
||
|
|
{
|
||
|
|
if (f != g)
|
||
|
|
acb_poly_set_round(g, f, prec);
|
||
|
|
|
||
|
|
_acb_poly_taylor_shift_divconquer(g->coeffs, c, g->length, prec);
|
||
|
|
}
|
||
|
|
|