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3ef6b850 | 1 | /* Wrapper for __scalbln handles setting errno. |
f7a9f785 | 2 | Copyright (C) 2014-2016 Free Software Foundation, Inc. |
3ef6b850 SL |
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 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <errno.h> | |
20 | #include <math.h> | |
21 | #include <math_private.h> | |
22 | ||
23 | double | |
24 | __w_scalbln (double x, long int n) | |
25 | { | |
d81f90cc | 26 | if (!isfinite (x) || x == 0.0) |
3ef6b850 SL |
27 | return x; |
28 | ||
29 | x = __scalbln (x, n); | |
30 | ||
d81f90cc | 31 | if (!isfinite (x) || x == 0.0) |
3ef6b850 SL |
32 | __set_errno (ERANGE); |
33 | ||
34 | return x; | |
35 | } | |
36 | weak_alias (__w_scalbln, scalbln) | |
37 | ||
38 | #ifdef NO_LONG_DOUBLE | |
39 | weak_alias (__w_scalbln, scalblnl) | |
40 | #endif |