1/* double mpf_get_d (mpf_t src) -- return SRC truncated to a double.
2
3Copyright 1996, 2001, 2002, 2003, 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
23double
24mpf_get_d (mpf_srcptr src)
25{
26  mp_size_t  size, abs_size;
27  long       exp;
28
29  size = SIZ (src);
30  if (UNLIKELY (size == 0))
31    return 0.0;
32
33  abs_size = ABS (size);
34  exp = (EXP (src) - abs_size) * GMP_NUMB_BITS;
35  return mpn_get_d (PTR (src), abs_size, size, exp);
36}
37