niceSOFT/mpfr | Gitverse

src/set_flt.c
33 строки1 KB
Vincent Lefèvre
03 янв 2018, 13:53
03 янв 2018, 13:532fce388
/* mpfr_set_flt -- convert a machine single precision float to mpfr_t

Copyright 2009-2018 Free Software Foundation, Inc.
Contributed by the AriC and Caramba projects, INRIA.

This file is part of the GNU MPFR Library.

The GNU MPFR 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 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 Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public License
along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */

#include "mpfr-impl.h"

int
mpfr_set_flt (mpfr_ptr r, float f, mpfr_rnd_t rnd_mode)
{
  /* we convert f to double precision and use mpfr_set_d;
     NaN and infinities should be preserved, and all single precision
     numbers are exactly representable in the double format, thus the
     conversion is always exact */
  return mpfr_set_d (r, (double) f, rnd_mode);
}