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
/*
Copyright (C) 2018 Daniel Schultz
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 "fmpq_mpoly.h"
int fmpq_mpoly_pow_ui(fmpq_mpoly_t A, const fmpq_mpoly_t B,
ulong k, const fmpq_mpoly_ctx_t ctx)
{
slong success;
/* we have to work around the fact that there is no fmpq_pow_ui */
if (k <= WORD_MAX)
{
fmpq_pow_si(A->content, B->content, k);
success = 1;
}
else if (fmpq_is_zero(B->content))
{
fmpq_mpoly_zero(A, ctx);
return 1;
}
else
{
if (!fmpq_is_pm1(B->content))
{
success = 0;
}
else
{
fmpz_set_si(fmpq_numref(A->content),
(k % UWORD(2)) == 0 || fmpq_is_one(B->content) ? 1 : -1);
fmpz_one(fmpq_denref(A->content));
success = 1;
}
}
success = success && fmpz_mpoly_pow_ui(A->zpoly, B->zpoly, k, ctx->zctx);
return success;
}