include/linux/rational.h

   1 /*
   2  * rational fractions
   3  *
   4  * Copyright (C) 2009 emlix GmbH, Oskar Schirmer <os@emlix.com>
   5  *
   6  * helper functions when coping with rational numbers,
   7  * e.g. when calculating optimum numerator/denominator pairs for
   8  * pll configuration taking into account restricted register size
   9  */
  10
  11 #ifndef _LINUX_RATIONAL_H
  12 #define _LINUX_RATIONAL_H
  13
  14 void rational_best_approximation(
  15         unsigned long given_numerator, unsigned long given_denominator,
  16         unsigned long max_numerator, unsigned long max_denominator,
  17         unsigned long *best_numerator, unsigned long *best_denominator);
  18
  19 #endif /* _LINUX_RATIONAL_H */