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
60
61
62
63
64
|
/*=============================================================================
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) 2007, David Howden.
Copyright (C) 2010 William Hart
******************************************************************************/
#include <gmp.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include "flint.h"
#include "nmod_poly.h"
char * nmod_poly_get_str(const nmod_poly_t poly)
{
slong i;
char * buf, * ptr;
/* estimate for the length, n and three spaces */
#if FLINT64
slong size = 21*2 + 1;
#else
slong size = 11*2 + 1;
#endif
for (i = 0; i < poly->length; i++)
{
if (poly->coeffs[i]) /* log(2)/log(10) < 0.30103, +1 for space/null */
size += (ulong) ceil(0.30103*FLINT_BIT_COUNT(poly->coeffs[i])) + 1;
else size += 2;
}
buf = (char *) flint_malloc(size);
ptr = buf + flint_sprintf(buf, "%wd %wu", poly->length, poly->mod.n);
if (poly->length)
ptr += flint_sprintf(ptr, " ");
for (i = 0; i < poly->length; i++)
ptr += flint_sprintf(ptr, " %wu", poly->coeffs[i]);
return buf;
}
|
