1 | /* Compute projection of complex float value to Riemann sphere. |
2 | Copyright (C) 1997-2016 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 | <http://www.gnu.org/licenses/>. */ |
19 | |
20 | #include <complex.h> |
21 | #include <math.h> |
22 | #include <math_private.h> |
23 | |
24 | |
25 | __complex__ float |
26 | __cprojf (__complex__ float x) |
27 | { |
28 | if (isinf (__real__ x) || isinf (__imag__ x)) |
29 | { |
30 | __complex__ float res; |
31 | |
32 | __real__ res = INFINITY; |
33 | __imag__ res = __copysignf (0.0, __imag__ x); |
34 | |
35 | return res; |
36 | } |
37 | |
38 | return x; |
39 | } |
40 | #ifndef __cprojf |
41 | weak_alias (__cprojf, cprojf) |
42 | #endif |
43 | |