pqc/external/flint-2.4.3/fmpz_poly_q/is_canonical.c
2014-05-24 23:16:06 +02:00

46 lines
1.4 KiB
C

/*=============================================================================
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) 2010, 2011 Sebastian Pancratz
******************************************************************************/
#include "fmpz_poly_q.h"
int fmpz_poly_q_is_canonical(const fmpz_poly_q_t op)
{
int ans;
fmpz_poly_t t;
if (fmpz_poly_is_zero(op->den))
return 0;
if (fmpz_sgn(fmpz_poly_lead(op->den)) < 0)
return 0;
fmpz_poly_init(t);
fmpz_poly_gcd(t, op->num, op->den);
ans = fmpz_poly_is_one(t);
fmpz_poly_clear(t);
return ans;
}