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

65 lines
1.9 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) 2011 Fredrik Johansson
Copyright (C) 2011 Sebastian Pancratz
******************************************************************************/
#include "fmpq.h"
void
_fmpq_div(fmpz_t rnum, fmpz_t rden, const fmpz_t op1num, const fmpz_t op1den,
const fmpz_t op2num, const fmpz_t op2den)
{
fmpz_t t, u;
fmpz_init(t);
fmpz_init(u);
fmpz_set(t, op2den);
fmpz_set(u, op2num);
_fmpq_mul(rnum, rden, op1num, op1den, t, u);
fmpz_clear(t);
fmpz_clear(u);
if (fmpz_sgn(rden) < 0)
{
fmpz_neg(rnum, rnum);
fmpz_neg(rden, rden);
}
}
void fmpq_div(fmpq_t res, const fmpq_t op1, const fmpq_t op2)
{
if (fmpq_is_zero(op2))
{
flint_printf("Exception (fmpq_div). Division by zero.\n");
abort();
}
_fmpq_div(fmpq_numref(res), fmpq_denref(res),
fmpq_numref(op1), fmpq_denref(op1),
fmpq_numref(op2), fmpq_denref(op2));
}