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 3 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,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU 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, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 /** @file lib/bits.h
  20  * @brief Bit operations
  21  */
  22
  23 #ifndef BITS_H
  24 #define BITS_H
  25
  26 #if HAVE_FLS
  27 static inline int leftmost_bit(uint32_t n) {
  28   return fls(n) - 1;
  29 }
  30 #else
  31 int leftmost_bit(uint32_t n);
  32 #endif
  33
  34 #endif /* BITS_H */
  35
  36
  37 /*
  38 Local Variables:
  39 c-basic-offset:2
  40 comment-column:40
  41 fill-column:79
  42 indent-tabs-mode:nil
  43 End:
  44 */