mirror of
https://github.com/vale981/arb
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46 lines
1 KiB
C
46 lines
1 KiB
C
/*
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Copyright (C) 2015 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 "acb.h"
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void
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acb_root_ui(acb_t res, const acb_t z, ulong n, slong prec)
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{
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if (n == 0)
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{
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acb_indeterminate(res);
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}
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else if (n == 1)
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{
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acb_set_round(res, z, prec);
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}
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else if (n == 2)
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{
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acb_sqrt(res, z, prec);
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}
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else if (n == 4)
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{
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acb_sqrt(res, z, prec + 4);
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acb_sqrt(res, res, prec);
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}
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else if (acb_is_real(z) && arb_is_nonnegative(acb_realref(z)))
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{
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arb_root(acb_realref(res), acb_realref(z), n, prec);
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arb_zero(acb_imagref(res));
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}
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else
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{
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acb_log(res, z, prec + 4);
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acb_div_ui(res, res, n, prec + 4);
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acb_exp(res, res, prec);
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}
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}
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