1/* mpf_set -- Assign a float from another float.
2
3Copyright 1993, 1994, 1995, 2001, 2004 Free Software Foundation, Inc.
4
5This file is part of the GNU MP Library.
6
7The GNU MP Library is free software; you can redistribute it and/or modify
8it under the terms of the GNU Lesser General Public License as published by
9the Free Software Foundation; either version 3 of the License, or (at your
10option) any later version.
11
12The GNU MP Library is distributed in the hope that it will be useful, but
13WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
15License for more details.
16
17You should have received a copy of the GNU Lesser General Public License
18along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
19
20#include "gmp.h"
21#include "gmp-impl.h"
22
23void
24mpf_set (mpf_ptr r, mpf_srcptr u)
25{
26  mp_ptr rp, up;
27  mp_size_t size, asize;
28  mp_size_t prec;
29
30  prec = r->_mp_prec + 1;		/* lie not to lose precision in assignment */
31  size = u->_mp_size;
32  asize = ABS (size);
33  rp = r->_mp_d;
34  up = u->_mp_d;
35
36  if (asize > prec)
37    {
38      up += asize - prec;
39      asize = prec;
40    }
41
42  r->_mp_exp = u->_mp_exp;
43  r->_mp_size = size >= 0 ? asize : -asize;
44  MPN_COPY_INCR (rp, up, asize);
45}
46