1/* Compute projection of complex float type value to Riemann sphere.
2 Copyright (C) 1997-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#include <complex.h>
21#include <math.h>
22
23
24CFLOAT
25M_DECL_FUNC (__cproj) (CFLOAT x)
26{
27 if (isinf (__real__ x) || isinf (__imag__ x))
28 {
29 CFLOAT res;
30
31 __real__ res = INFINITY;
32 __imag__ res = M_COPYSIGN (0, __imag__ x);
33
34 return res;
35 }
36
37 return x;
38}
39
40declare_mgen_alias (__cproj, cproj)
41