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https://github.com/vale981/arb
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28 lines
691 B
C
28 lines
691 B
C
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/*
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Copyright (C) 2018 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_real_sgn(acb_t res, const acb_t z, int analytic, slong prec)
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{
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if (!acb_is_finite(z) || (analytic && arb_contains_zero(acb_realref(z))))
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{
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acb_indeterminate(res);
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}
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else
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{
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acb_csgn(acb_realref(res), z);
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arb_zero(acb_imagref(res));
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}
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}
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