mdw@git.distorted.org.uk Git - disorder/blob - lib/bits.h

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2008 Richard Kettlewell
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20
  21 /** @file lib/bits.h
  22  * @brief Bit operations
  23  */
  24
  25 #ifndef BITS_H
  26 #define BITS_H
  27
  28 #include <string.h>                     /* for fls() */
  29
  30 #if HAVE_FLS
  31 static inline int leftmost_bit(uint32_t n) {
  32   return fls(n) - 1;
  33 }
  34 #else
  35 int leftmost_bit(uint32_t n);
  36 #endif
  37
  38 #endif /* BITS_H */
  39
  40
  41 /*
  42 Local Variables:
  43 c-basic-offset:2
  44 comment-column:40
  45 fill-column:79
  46 indent-tabs-mode:nil
  47 End:
  48 */