mirror of
https://github.com/vale981/arb
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56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/*=============================================================================
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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) 2014 Fredrik Johansson
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******************************************************************************/
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#include "arf.h"
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long
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arf_abs_bound_lt_2exp_si(const arf_t x)
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{
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long res;
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if (arf_is_special(x))
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{
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if (arf_is_zero(x))
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return -ARF_PREC_EXACT;
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else
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return ARF_PREC_EXACT;
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}
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if (!COEFF_IS_MPZ(ARF_EXP(x)))
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return ARF_EXP(x);
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if (fmpz_fits_si(ARF_EXPREF(x)))
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res = fmpz_get_si(ARF_EXPREF(x));
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else
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res = fmpz_sgn(ARF_EXPREF(x)) < 0 ? -ARF_PREC_EXACT : ARF_PREC_EXACT;
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if (res < -ARF_PREC_EXACT)
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res = -ARF_PREC_EXACT;
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if (res > ARF_PREC_EXACT)
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res = ARF_PREC_EXACT;
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return res;
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}
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