1 /* mpf_trunc -- truncate an mpf to an integer.
3 Copyright 2001 Free Software Foundation, Inc.
5 This file is part of the GNU MP Library.
7 The GNU MP Library is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or (at your
10 option) any later version.
12 The GNU MP Library is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
15 License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
24 /* Notice the use of prec+1 ensures mpf_trunc is equivalent to mpf_set if u
25 is already an integer. */
28 mpf_trunc (mpf_ptr r
, mpf_srcptr u
)
32 mp_size_t size
, asize
, prec
;
37 if (size
== 0 || exp
<= 0)
39 /* u is only a fraction */
50 /* skip fraction part of u */
51 asize
= MIN (asize
, exp
);
53 /* don't lose precision in the copy */
56 /* skip excess over target precision */
57 asize
= MIN (asize
, prec
);
61 SIZ(r
) = (size
>= 0 ? asize
: -asize
);
63 MPN_COPY_INCR (rp
, up
, asize
);