82 lines
2.3 KiB
C
82 lines
2.3 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_evaluate(mpq_t rop, const fmpz_poly_q_t f, const mpq_t a)
|
||
|
|
{
|
||
|
|
if (flint_mpz_cmp_si(mpq_denref(a), 1)) /* a is not an integer */
|
||
|
|
{
|
||
|
|
mpq_t mpqnum, mpqden;
|
||
|
|
|
||
|
|
mpq_init(mpqden);
|
||
|
|
fmpz_poly_evaluate_mpq(mpqden, f->den, a);
|
||
|
|
if (mpq_sgn(mpqden) == 0)
|
||
|
|
{
|
||
|
|
mpq_clear(mpqden);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
mpq_init(mpqnum);
|
||
|
|
|
||
|
|
fmpz_poly_evaluate_mpq(mpqnum, f->num, a);
|
||
|
|
mpq_div(rop, mpqnum, mpqden);
|
||
|
|
|
||
|
|
mpq_clear(mpqnum);
|
||
|
|
mpq_clear(mpqden);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
else /* a is an integer */
|
||
|
|
{
|
||
|
|
fmpz_t num, den, a2;
|
||
|
|
|
||
|
|
fmpz_init(num);
|
||
|
|
fmpz_init(den);
|
||
|
|
fmpz_init(a2);
|
||
|
|
|
||
|
|
fmpz_set_mpz(a2, mpq_numref(a));
|
||
|
|
|
||
|
|
fmpz_poly_evaluate_fmpz(den, f->den, a2);
|
||
|
|
if (fmpz_is_zero(den))
|
||
|
|
{
|
||
|
|
fmpz_clear(a2);
|
||
|
|
fmpz_clear(num);
|
||
|
|
fmpz_clear(den);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
fmpz_poly_evaluate_fmpz(num, f->num, a2);
|
||
|
|
|
||
|
|
fmpz_get_mpz(mpq_numref(rop), num);
|
||
|
|
fmpz_get_mpz(mpq_denref(rop), den);
|
||
|
|
mpq_canonicalize(rop);
|
||
|
|
|
||
|
|
fmpz_clear(a2);
|
||
|
|
fmpz_clear(num);
|
||
|
|
fmpz_clear(den);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|