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/* mpf_cmp_d -- compare mpf and double.
Copyright 2001, 2003 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The GNU MP 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library. If not, see https://www.gnu.org/licenses/. */
#include "config.h"
#if HAVE_FLOAT_H
#include <float.h> /* for DBL_MAX */
#endif
#include "gmp.h"
#include "gmp-impl.h"
int
mpf_cmp_d (mpf_srcptr f, double d)
{
mp_limb_t darray[LIMBS_PER_DOUBLE];
mpf_t df;
/* d=NaN has no sensible return value, so raise an exception.
d=Inf or -Inf is always bigger than z. */
DOUBLE_NAN_INF_ACTION (d,
__gmp_invalid_operation (),
return (d < 0.0 ? 1 : -1));
if (d == 0.0)
return SIZ(f);
PTR(df) = darray;
SIZ(df) = (d >= 0.0 ? LIMBS_PER_DOUBLE : -LIMBS_PER_DOUBLE);
EXP(df) = __gmp_extract_double (darray, ABS(d));
return mpf_cmp (f, df);
}
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