52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/* mpf_cmp_d -- compare mpf and double.
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Copyright 2001, 2003 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "config.h"
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#if HAVE_FLOAT_H
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#include <float.h> /* for DBL_MAX */
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#endif
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#include "gmp.h"
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#include "gmp-impl.h"
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int
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mpf_cmp_d (mpf_srcptr f, double d)
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{
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mp_limb_t darray[LIMBS_PER_DOUBLE];
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mpf_t df;
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/* d=NaN has no sensible return value, so raise an exception.
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d=Inf or -Inf is always bigger than z. */
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DOUBLE_NAN_INF_ACTION (d,
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__gmp_invalid_operation (),
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return (d < 0.0 ? 1 : -1));
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if (d == 0.0)
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return SIZ(f);
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PTR(df) = darray;
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SIZ(df) = (d >= 0.0 ? LIMBS_PER_DOUBLE : -LIMBS_PER_DOUBLE);
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EXP(df) = __gmp_extract_double (darray, ABS(d));
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return mpf_cmp (f, df);
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}
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