blob: 081a17fa8be93a364911e2a08e731d8bf5e21377 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/* mpfr_isinteger -- test if a mpfr variable is integer
Copyright 2001 Free Software Foundation, Inc.
This file is part of the MPFR Library.
The 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 2.1 of the License, or (at your
option) any later version.
The 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 MPFR Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include "gmp.h"
#include "gmp-impl.h"
#include "mpfr.h"
#include "mpfr-impl.h"
int
mpfr_isinteger (mpfr_srcptr x)
{
mpfr_t u;
int expo;
mp_prec_t prec;
expo=(int)MPFR_EXP(x);
prec=MPFR_PREC(x);
if (expo<=0)
return 0;
if (expo>=prec)
return 1;
mpfr_init2(u,prec);
mpfr_trunc(u,x);
if(mpfr_cmp(x,u)==0) return 1;
else return 0;
}
|
