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string/ffsll.c
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Paul Eggert
Update copyright dates with scripts/update-copyrights
02 янв 2026, 00:42
02 янв 2026, 00:42
66f3e92
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/* Copyright (C) 1991-2026 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #include <limits.h> #define ffsl __something_else #include <string.h> #undef ffsll #include <math-use-builtins.h> #include <libc-diag.h> /* Find the first bit set in I. */ int __ffsll (long long int i) { #if USE_FFSLL_BUILTIN return __builtin_ffsll (i); #else unsigned long long int x = i & -i; if (x <= 0xffffffff) return ffs (i); else return 32 + ffs (i >> 32); #endif } static_weak_alias (__ffsll, ffsll) #if ULONG_MAX != UINT_MAX #undef ffsl static_weak_alias (__ffsll, ffsl) #endif