1 /* Compute projection of complex float type value to Riemann sphere.
2    Copyright (C) 1997-2022 Free Software Foundation, Inc.
3    This file is part of the GNU C Library.
4 
5    The GNU C Library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Lesser General Public
7    License as published by the Free Software Foundation; either
8    version 2.1 of the License, or (at your option) any later version.
9 
10    The GNU C Library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Lesser General Public License for more details.
14 
15    You should have received a copy of the GNU Lesser General Public
16    License along with the GNU C Library; if not, see
17    <https://www.gnu.org/licenses/>.  */
18 
19 #include <complex.h>
20 #include <math.h>
21 
22 
23 CFLOAT
M_DECL_FUNC(__cproj)24 M_DECL_FUNC (__cproj) (CFLOAT x)
25 {
26   if (isinf (__real__ x) || isinf (__imag__ x))
27     {
28       CFLOAT res;
29 
30       __real__ res = INFINITY;
31       __imag__ res = M_COPYSIGN (0, __imag__ x);
32 
33       return res;
34     }
35 
36   return x;
37 }
38 
39 declare_mgen_alias (__cproj, cproj)
40