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/*=============================================================================
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) 2009 William Hart
Copyright (C) 2010 Sebastian Pancratz
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "ulong_extras.h"
#include "fmpz.h"
void
fmpz_tdiv_q_ui(fmpz_t f, const fmpz_t g, ulong h)
{
fmpz c1 = *g;
ulong c2 = h;
if (h == 0)
{
flint_printf("Exception (fmpz_tdiv_q_ui). Division by zero.\n");
abort();
}
if (!COEFF_IS_MPZ(c1)) /* g is small */
{
if (c1 > 0)
{
fmpz_set_ui(f, c1 / c2);
}
else
{
ulong q = ((ulong) -c1) / c2;
fmpz_set_si(f, - (slong) q);
}
}
else /* g is large */
{
__mpz_struct *mpz_ptr = _fmpz_promote(f);
flint_mpz_tdiv_q_ui(mpz_ptr, COEFF_TO_PTR(c1), c2);
_fmpz_demote_val(f); /* division by h may result in small value */
}
}
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