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

69 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 Sebastian Pancratz
******************************************************************************/
#include "fmpq.h"
void _fmpq_pow_si(fmpz_t rnum, fmpz_t rden,
const fmpz_t opnum, const fmpz_t opden, slong e)
{
if (e >= 0)
{
fmpz_pow_ui(rnum, opnum, e);
fmpz_pow_ui(rden, opden, e);
}
else
{
if (rnum == opnum)
{
fmpz t;
fmpz_pow_ui(rnum, opnum, -e);
fmpz_pow_ui(rden, opden, -e);
t = *rnum;
*rnum = *rden;
*rden = t;
}
else
{
fmpz_pow_ui(rden, opnum, -e);
fmpz_pow_ui(rnum, opden, -e);
}
if (fmpz_sgn(rden) < 0)
{
fmpz_neg(rnum, rnum);
fmpz_neg(rden, rden);
}
}
}
void fmpq_pow_si(fmpq_t rop, const fmpq_t op, slong e)
{
_fmpq_pow_si(fmpq_numref(rop), fmpq_denref(rop),
fmpq_numref(op), fmpq_denref(op), e);
}