mirror of
https://github.com/videolan/vlc.git
synced 2024-12-14 12:14:42 +08:00
34 lines
1.3 KiB
C
34 lines
1.3 KiB
C
/*****************************************************************************
|
|
* ffsllp.c: GNU ffsll() replacement
|
|
*****************************************************************************
|
|
* Copyright © 2015 Rémi Denis-Courmont
|
|
*
|
|
* This program 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.
|
|
*
|
|
* This program 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 this program; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
|
|
*****************************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <limits.h>
|
|
|
|
int ffsll(unsigned long long x)
|
|
{
|
|
for (unsigned i = 0; i < sizeof (x) * CHAR_BIT; i++)
|
|
if ((x >> i) & 1)
|
|
return i + 1;
|
|
return 0;
|
|
}
|