1 /* Wrapper to set errno for lgamma_r. 2 Copyright (C) 2017-2022 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 /* 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 24 # include <errno.h> 25 # include <fenv.h> 26 # include <math.h> 27 # include <math_private.h> 28 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)) 32 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)) 36 37 FLOAT M_DECL_FUNC_R(__lgamma)38M_DECL_FUNC_R (__lgamma) (FLOAT x, int *signgamp) 39 { 40 FLOAT y = M_CALL_FUNC_R (__ieee754_lgamma) (x, signgamp); 41 if (__glibc_unlikely (!isfinite (y)) && isfinite (x)) 42 /* Pole error: lgamma_r(integer x<0). Or overflow. */ 43 __set_errno (ERANGE); 44 return y; 45 } 46 declare_mgen_alias_r (__lgamma, lgamma) 47 48 #endif /* __USE_WRAPPER_TEMPLATE. */ 49