mirror of
https://github.com/vale981/arb
synced 2025-03-06 01:41:39 -05:00
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/*
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Copyright (C) 2014 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_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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flint_abort();
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r = 0; /* dummy return because flint_abort() is not declared noreturn */
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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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