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
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*============================================================================
This file is part of FLINT.
FLINT 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.
FLINT 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 FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2011, 2012 Sebastian Pancratz
******************************************************************************/
#include "padic_poly.h"
void padic_poly_reduce(padic_poly_t poly, const padic_ctx_t ctx)
{
const slong N = padic_poly_prec(poly);
if (poly->length > 0)
{
if (poly->val >= N)
{
padic_poly_zero(poly);
}
else
{
fmpz_t pow;
int alloc;
alloc = _padic_ctx_pow_ui(pow, N - poly->val, ctx);
_fmpz_vec_scalar_mod_fmpz(poly->coeffs, poly->coeffs, poly->length, pow);
if (alloc)
fmpz_clear(pow);
_padic_poly_normalise(poly);
if (poly->length == 0)
{
poly->val = 0;
}
}
}
}
|
