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feb62dda | 1 | /* Compute projection of complex float type value to Riemann sphere. |
2b778ceb | 2 | Copyright (C) 1997-2021 Free Software Foundation, Inc. |
1dbc54f6 | 3 | This file is part of the GNU C Library. |
1dbc54f6 PM |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
1dbc54f6 PM |
18 | |
19 | #include <complex.h> | |
20 | #include <math.h> | |
1dbc54f6 PM |
21 | |
22 | ||
feb62dda PM |
23 | CFLOAT |
24 | M_DECL_FUNC (__cproj) (CFLOAT x) | |
1dbc54f6 PM |
25 | { |
26 | if (isinf (__real__ x) || isinf (__imag__ x)) | |
27 | { | |
feb62dda | 28 | CFLOAT res; |
1dbc54f6 PM |
29 | |
30 | __real__ res = INFINITY; | |
feb62dda | 31 | __imag__ res = M_COPYSIGN (0, __imag__ x); |
1dbc54f6 PM |
32 | |
33 | return res; | |
34 | } | |
35 | ||
36 | return x; | |
37 | } | |
feb62dda PM |
38 | |
39 | declare_mgen_alias (__cproj, cproj) |