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33 lines
766 B
C
33 lines
766 B
C
/*
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Copyright (C) 2016 Fredrik Johansson
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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 it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version. See <http://www.gnu.org/licenses/>.
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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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