1 | /* Wrapper for __scalbln handles setting errno. |
2 | Copyright (C) 2014-2022 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 <errno.h> |
20 | #include <math.h> |
21 | |
22 | FLOAT |
23 | M_DECL_FUNC (__w_scalbln) (FLOAT x, long int n) |
24 | { |
25 | if (!isfinite (x) || x == 0) |
26 | return x + x; |
27 | |
28 | x = M_SUF (__scalbln) (x, n); |
29 | |
30 | if (!isfinite (x) || x == 0) |
31 | __set_errno (ERANGE); |
32 | |
33 | return x; |
34 | } |
35 | |
36 | declare_mgen_alias (__w_scalbln, scalbln) |
37 | |