1 /* Wrapper to set errno for lgamma_r.
2 Copyright (C) 2017 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
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
27 # include <math_private.h>
29 #define M_DECL_FUNC_R_X(x) x ## _r
30 #define M_DECL_FUNC_R_S(x) M_DECL_FUNC_R_X (x)
31 #define M_DECL_FUNC_R(x) M_DECL_FUNC_R_S (M_SUF (x))
33 #define M_CALL_FUNC_R_X(x) x ## _r
34 #define M_CALL_FUNC_R_S(x) M_CALL_FUNC_R_X (x)
35 #define M_CALL_FUNC_R(x) M_CALL_FUNC_R_S (M_SUF (x))
37 #define declare_mgen_alias_r_x(from, to) weak_alias (from ## _r, to ## _r)
38 #define declare_mgen_alias_r_s(from, to) \
39 declare_mgen_alias_r_x (from, to)
40 #define declare_mgen_alias_r(from, to) \
41 declare_mgen_alias_r_s (M_SUF (from), M_SUF (to))
44 M_DECL_FUNC_R (__lgamma
) (FLOAT x
, int *signgamp
)
46 FLOAT y
= M_CALL_FUNC_R (__ieee754_lgamma
) (x
, signgamp
);
47 if (__glibc_unlikely (!isfinite (y
)) && isfinite (x
))
48 /* Pole error: lgamma_r(integer x<0). Or overflow. */
52 declare_mgen_alias_r (__lgamma
, lgamma
)
54 #endif /* __USE_WRAPPER_TEMPLATE. */