mirror of
https://github.com/vale981/arb
synced 2025-03-06 09:51:39 -05:00
69 lines
2.2 KiB
C
69 lines
2.2 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) 2012 Fredrik Johansson
|
||
|
|
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
#include "fmpcb_poly.h"
|
||
|
|
|
||
|
|
void _fmpcb_poly_mul(fmpcb_struct * C,
|
||
|
|
const fmpcb_struct * A, long lenA,
|
||
|
|
const fmpcb_struct * B, long lenB, long prec)
|
||
|
|
{
|
||
|
|
_fmpcb_poly_mullow(C, A, lenA, B, lenB, lenA + lenB - 1, prec);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
fmpcb_poly_mul(fmpcb_poly_t res, const fmpcb_poly_t poly1,
|
||
|
|
const fmpcb_poly_t poly2, long prec)
|
||
|
|
{
|
||
|
|
long len_out;
|
||
|
|
|
||
|
|
if ((poly1->length == 0) || (poly2->length == 0))
|
||
|
|
{
|
||
|
|
fmpcb_poly_zero(res);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
len_out = poly1->length + poly2->length - 1;
|
||
|
|
|
||
|
|
if (res == poly1 || res == poly2)
|
||
|
|
{
|
||
|
|
fmpcb_poly_t temp;
|
||
|
|
fmpcb_poly_init2(temp, len_out);
|
||
|
|
_fmpcb_poly_mul(temp->coeffs, poly1->coeffs, poly1->length,
|
||
|
|
poly2->coeffs, poly2->length, prec);
|
||
|
|
fmpcb_poly_swap(res, temp);
|
||
|
|
fmpcb_poly_clear(temp);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
fmpcb_poly_fit_length(res, len_out);
|
||
|
|
_fmpcb_poly_mul(res->coeffs, poly1->coeffs, poly1->length,
|
||
|
|
poly2->coeffs, poly2->length, prec);
|
||
|
|
}
|
||
|
|
|
||
|
|
_fmpcb_poly_set_length(res, len_out);
|
||
|
|
_fmpcb_poly_normalise(res);
|
||
|
|
}
|
||
|
|
|