mirror of
https://github.com/vale981/arb
synced 2025-03-05 09:21:38 -05:00
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/*
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Copyright (C) 2012 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 "fmpr.h"
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int
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fmpr_get_mpfr(mpfr_t x, const fmpr_t y, mpfr_rnd_t rnd)
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{
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int r;
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if (fmpr_is_special(y))
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{
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if (fmpr_is_zero(y)) mpfr_set_zero(x, 0);
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else if (fmpr_is_pos_inf(y)) mpfr_set_inf(x, 1);
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else if (fmpr_is_neg_inf(y)) mpfr_set_inf(x, -1);
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else mpfr_set_nan(x);
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r = 0;
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}
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else if (COEFF_IS_MPZ(*fmpr_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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if (!COEFF_IS_MPZ(*fmpr_manref(y)))
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#if defined(__MINGW64__) || defined(_MSC_VER)
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r = mpfr_set_sj_2exp(x, *fmpr_manref(y), *fmpr_expref(y), rnd);
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#else
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r = mpfr_set_si_2exp(x, *fmpr_manref(y), *fmpr_expref(y), rnd);
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#endif
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else
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r = mpfr_set_z_2exp(x, COEFF_TO_PTR(*fmpr_manref(y)), *fmpr_expref(y), rnd);
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if (!mpfr_regular_p(x))
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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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}
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}
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return r;
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}
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