gmp-4.3.1/mpf/sub_ui.c

/* mpf_sub_ui -- Subtract an unsigned integer from a float.

Copyright 1993, 1994, 1996, 2001 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 http://www.gnu.org/licenses/.  */

#include "gmp.h"
#include "gmp-impl.h"

void
mpf_sub_ui (mpf_ptr sum, mpf_srcptr u, unsigned long int v)
{
  __mpf_struct vv;
  mp_limb_t vl;

  if (v == 0)
    {
      mpf_set (sum, u);
      return;
    }

  vl = v;
  vv._mp_size = 1;
  vv._mp_d = &vl;
  vv._mp_exp = 1;
  mpf_sub (sum, u, &vv);
}