1 /*
2 Copyright (C) 2018 Fredrik Johansson
3
4 This file is part of Arb.
5
6 Arb is free software: you can redistribute it and/or modify it under
7 the terms of the GNU Lesser General Public License (LGPL) as published
8 by the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version. See <http://www.gnu.org/licenses/>.
10 */
11
12 #include "acb.h"
13
14 void
acb_real_abs(acb_t res,const acb_t z,int analytic,slong prec)15 acb_real_abs(acb_t res, const acb_t z, int analytic, slong prec)
16 {
17 if (!acb_is_finite(z) || (analytic && arb_contains_zero(acb_realref(z))))
18 {
19 acb_indeterminate(res);
20 }
21 else
22 {
23 if (arb_is_nonnegative(acb_realref(z)))
24 {
25 acb_set_round(res, z, prec);
26 }
27 else if (arb_is_negative(acb_realref(z)))
28 {
29 acb_neg_round(res, z, prec);
30 }
31 else
32 {
33 acb_t t;
34 acb_init(t);
35 acb_neg(t, z);
36 acb_union(res, z, t, prec);
37 acb_clear(t);
38 }
39 }
40 }
41