mirror of
https://github.com/vale981/arb
synced 2025-03-06 09:51:39 -05:00
68 lines
1.9 KiB
C
68 lines
1.9 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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int
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arf_get_mpfr(mpfr_t x, const arf_t y, mpfr_rnd_t rnd)
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{
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int r;
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if (arf_is_special(y))
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{
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if (arf_is_zero(y))
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mpfr_set_zero(x, 0);
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else if (arf_is_pos_inf(y))
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mpfr_set_inf(x, 1);
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else if (arf_is_neg_inf(y))
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mpfr_set_inf(x, -1);
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else
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mpfr_set_nan(x);
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r = 0;
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}
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else if (COEFF_IS_MPZ(*ARF_EXPREF(y)))
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{
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flint_printf("exception: exponent too large to convert to mpfr");
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abort();
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}
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else
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{
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__mpfr_struct t;
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mp_size_t n;
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mp_srcptr d;
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ARF_GET_MPN_READONLY(d, n, y);
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t._mpfr_d = (mp_ptr) d;
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t._mpfr_exp = ARF_EXP(y);
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t._mpfr_prec = n * FLINT_BITS;
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t._mpfr_sign = ARF_SGNBIT(y) ? -1 : 1;
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r = mpfr_set(x, &t, rnd);
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}
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return r;
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}
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