projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| aec0821c | 1 | /* Wrapper to set errno for tgamma. |
| 2b778ceb | 2 | Copyright (C) 2017-2021 Free Software Foundation, Inc. |
| aec0821c GG |
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 | |
| 5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
| aec0821c GG |
18 | |
| 19 | /* Only build wrappers from the templates for the types that define the macro | |
| 20 | below. This macro is set in math-type-macros-<type>.h in sysdeps/generic | |
| 21 | for each floating-point type. */ | |
| 22 | #if __USE_WRAPPER_TEMPLATE | |
| 23 | ||
| 46d2e49c | 24 | # include <errno.h> |
| aec0821c GG |
25 | # include <fenv.h> |
| 26 | # include <math.h> | |
| 27 | # include <math_private.h> | |
| 28 | ||
| 29 | #define M_CALL_FUNC_X(x) x ## _r | |
| 30 | #define M_CALL_FUNC(x) M_CALL_FUNC_X (x) | |
| 31 | ||
| 32 | FLOAT | |
| 33 | M_DECL_FUNC (__tgamma) (FLOAT x) | |
| 34 | { | |
| 35 | int local_signgam; | |
| 36 | FLOAT y = M_CALL_FUNC (M_SUF (__ieee754_gamma)) (x, &local_signgam); | |
| 37 | ||
| 38 | if (__glibc_unlikely (!isfinite (y) || y == 0) | |
| 39 | && (isfinite (x) || (isinf (x) && x < 0))) | |
| 40 | { | |
| 41 | if (x == 0) | |
| 42 | /* Pole error: tgamma(x=0). */ | |
| 43 | __set_errno (ERANGE); | |
| e44acb20 | 44 | else if (M_SUF (floor) (x) == x && x < 0) |
| aec0821c GG |
45 | /* Domain error: tgamma(integer x<0). */ |
| 46 | __set_errno (EDOM); | |
| 47 | else | |
| 48 | /* Overflow or underflow. */ | |
| 49 | __set_errno (ERANGE); | |
| 50 | } | |
| 51 | return local_signgam < 0 ? -y : y; | |
| 52 | } | |
| 53 | declare_mgen_alias (__tgamma, tgamma) | |
| 54 | ||
| 55 | #endif /* __USE_WRAPPER_TEMPLATE. */ |