mirror of
https://github.com/vale981/arb
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48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
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/*=============================================================================
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This file is part of ARB.
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ARB is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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ARB is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with ARB; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2016 Fredrik Johansson
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******************************************************************************/
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#include "arf.h"
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int
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arf_is_int(const arf_t x)
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{
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mp_size_t xn;
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mp_srcptr xp;
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slong exp, c;
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exp = ARF_EXP(x);
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if (ARF_IS_SPECIAL(x))
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return exp == ARF_EXP_ZERO;
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if (COEFF_IS_MPZ(exp))
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return mpz_sgn(COEFF_TO_PTR(exp)) > 0;
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ARF_GET_MPN_READONLY(xp, xn, x);
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count_trailing_zeros(c, xp[0]);
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return exp - xn * FLINT_BITS + c >= 0;
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}
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