pqc/external/flint-2.4.3/fmpq_poly/evaluate_fmpq.c

74 lines
2.1 KiB
C
Raw Normal View History

2014-05-18 22:03:37 +00:00
/*=============================================================================
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 Sebastian Pancratz
Copyright (C) 2011 Fredrik Johansson
******************************************************************************/
#include <gmp.h>
#include "flint.h"
#include "fmpz.h"
#include "fmpz_poly.h"
#include "fmpq_poly.h"
#include "fmpq.h"
void
_fmpq_poly_evaluate_fmpq(fmpz_t rnum, fmpz_t rden,
const fmpz * poly, const fmpz_t den, slong len,
const fmpz_t anum, const fmpz_t aden)
{
fmpz_t d;
_fmpz_poly_evaluate_horner_mpq(rnum, rden, poly, len, anum, aden);
fmpz_mul(rden, rden, den);
fmpz_init(d);
fmpz_gcd(d, rnum, rden);
if (*d != WORD(1))
{
fmpz_divexact(rnum, rnum, d);
fmpz_divexact(rden, rden, d);
}
fmpz_clear(d);
}
void
fmpq_poly_evaluate_fmpq(fmpq_t res, const fmpq_poly_t poly, const fmpq_t a)
{
if (res != a)
{
_fmpq_poly_evaluate_fmpq(fmpq_numref(res), fmpq_denref(res),
poly->coeffs, poly->den, poly->length,
fmpq_numref(a), fmpq_denref(a));
}
else
{
fmpq_t t;
fmpq_init(t);
fmpq_set(t, a);
fmpq_poly_evaluate_fmpq(res, poly, t);
fmpq_clear(t);
}
}