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/* mpf_integer_p -- test whether an mpf is an integer */
/*
Copyright 2001, 2002 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"
int
mpf_integer_p (mpf_srcptr f)
{
mp_srcptr ptr;
mp_exp_t exp;
mp_size_t size, frac, i;
size = SIZ (f);
if (size == 0)
return 1; /* zero is an integer */
exp = EXP (f);
if (exp <= 0)
return 0; /* has only fraction limbs */
/* any fraction limbs must be zero */
frac = ABS (size) - exp;
ptr = PTR (f);
for (i = 0; i < frac; i++)
if (ptr[i] != 0)
return 0;
return 1;
}
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