52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
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/* mpf_integer_p -- test whether an mpf is an integer */
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/*
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Copyright 2001, 2002 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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*/
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#include "gmp.h"
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#include "gmp-impl.h"
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int
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mpf_integer_p (mpf_srcptr f)
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{
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mp_srcptr ptr;
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mp_exp_t exp;
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mp_size_t size, frac, i;
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size = SIZ (f);
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if (size == 0)
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return 1; /* zero is an integer */
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exp = EXP (f);
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if (exp <= 0)
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return 0; /* has only fraction limbs */
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/* any fraction limbs must be zero */
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frac = ABS (size) - exp;
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ptr = PTR (f);
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for (i = 0; i < frac; i++)
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if (ptr[i] != 0)
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return 0;
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return 1;
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}
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