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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) 2011 Fredrik Johansson
******************************************************************************/
#include <gmp.h>
#include "flint.h"
#include "ulong_extras.h"
#include "fmpz.h"
#if FLINT64 /* 2^53 */
#define DOUBLE_MAX 9007199254740992.0
#define DOUBLE_MIN -9007199254740992.0
#else
#define DOUBLE_MAX COEFF_MAX
#define DOUBLE_MIN COEFF_MIN
#endif
void
fmpz_set_d(fmpz_t f, double c)
{
if (c >= DOUBLE_MIN && c <= DOUBLE_MAX)
{
_fmpz_demote(f);
/* guaranteed to fit, since c gets truncated */
*f = (slong) c;
}
else
{
__mpz_struct * z = _fmpz_promote(f);
mpz_set_d(z, c);
_fmpz_demote_val(f);
}
}
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