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feb62dda | 1 | /* Compute projection of complex float type value to Riemann sphere. |
bfff8b1b | 2 | Copyright (C) 1997-2017 Free Software Foundation, Inc. |
1dbc54f6 PM |
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 | ||
feb62dda PM |
25 | CFLOAT |
26 | M_DECL_FUNC (__cproj) (CFLOAT x) | |
1dbc54f6 PM |
27 | { |
28 | if (isinf (__real__ x) || isinf (__imag__ x)) | |
29 | { | |
feb62dda | 30 | CFLOAT res; |
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31 | |
32 | __real__ res = INFINITY; | |
feb62dda | 33 | __imag__ res = M_COPYSIGN (0, __imag__ x); |
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34 | |
35 | return res; | |
36 | } | |
37 | ||
38 | return x; | |
39 | } | |
feb62dda PM |
40 | |
41 | declare_mgen_alias (__cproj, cproj) |