1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
/*
Copyright (C) 2010 Sebastian Pancratz
This file is part of FLINT.
FLINT 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 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "fmpz.h"
#include "fmpz_poly.h"
#include "fmpq_poly.h"
void
fmpq_poly_shift_right(fmpq_poly_t res, const fmpq_poly_t poly, slong n)
{
if (n == 0)
{
fmpq_poly_set(res, poly);
return;
}
if (poly->length <= n)
{
fmpq_poly_zero(res);
return;
}
fmpq_poly_fit_length(res, poly->length - n);
_fmpz_poly_shift_right(res->coeffs, poly->coeffs, poly->length, n);
fmpz_set(res->den, poly->den);
_fmpq_poly_set_length(res, poly->length - n);
fmpq_poly_canonicalise(res);
}