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/* Save/restore the minimum and maximum exponents.
Copyright (C) 1999 Free Software Foundation.
This file is part of the MPFR Library.
The MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
The MPFR Library 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with the MPFR Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp.h"
#include "mpfr.h"
#include "mpfr-impl.h"
static unsigned int saved_flags;
static mp_exp_t saved_emin;
static mp_exp_t saved_emax;
static unsigned int save_ctr = 0;
void
mpfr_save_emin_emax (void)
{
if (save_ctr++ == 0)
{
saved_flags = __mpfr_flags;
saved_emin = __mpfr_emin;
saved_emax = __mpfr_emax;
__mpfr_emin = MPFR_EMIN_MIN;
__mpfr_emax = MPFR_EMAX_MAX;
}
else if (save_ctr == 0)
{
fprintf(stderr,
"Error: Too many consecutive calls to mpfr_save_emin_emax!\n"
"Probably a bug.\n");
exit(1);
}
}
void
mpfr_restore_emin_emax (void)
{
if (--save_ctr == 0)
{
__mpfr_flags = saved_flags;
__mpfr_emin = saved_emin;
__mpfr_emax = saved_emax;
}
}
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