pqc/external/flint-2.4.3/fmpq/submul.c

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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) 2011 Fredrik Johansson
******************************************************************************/
#include "fmpq.h"
void
_fmpq_submul(fmpz_t rnum, fmpz_t rden, const fmpz_t op1num, const fmpz_t op1den,
const fmpz_t op2num, const fmpz_t op2den)
{
fmpz_t u, v;
fmpz_init(u);
fmpz_init(v);
_fmpq_mul(u, v, op1num, op1den, op2num, op2den);
_fmpq_sub(rnum, rden, rnum, rden, u, v);
fmpz_clear(u);
fmpz_clear(v);
}
void fmpq_submul(fmpq_t res, const fmpq_t op1, const fmpq_t op2)
{
_fmpq_submul(fmpq_numref(res), fmpq_denref(res),
fmpq_numref(op1), fmpq_denref(op1),
fmpq_numref(op2), fmpq_denref(op2));
}