| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 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 |