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 M_DECL_FUNC(__w_scalbln)23M_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