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Diffstat (limited to 'REORG.TODO/string/ffsll.c')
-rw-r--r-- | REORG.TODO/string/ffsll.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/REORG.TODO/string/ffsll.c b/REORG.TODO/string/ffsll.c new file mode 100644 index 0000000000..5e403ef938 --- /dev/null +++ b/REORG.TODO/string/ffsll.c @@ -0,0 +1,40 @@ +/* Copyright (C) 1991-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Torbjorn Granlund (tege@sics.se). + + 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 + <http://www.gnu.org/licenses/>. */ + +#include <limits.h> +#define ffsl __something_else +#include <string.h> + +#undef ffsll + +/* Find the first bit set in I. */ +int +ffsll (long long int i) +{ + unsigned long long int x = i & -i; + + if (x <= 0xffffffff) + return ffs (i); + else + return 32 + ffs (i >> 32); +} + +#if ULONG_MAX != UINT_MAX +#undef ffsl +weak_alias (ffsll, ffsl) +#endif |