Standard C Library Functions                              ffs(3C)



NAME
     ffs - find first set bit

SYNOPSIS
     #include 

     int ffs(const int i);


DESCRIPTION
     The ffs() function finds the first bit set  (beginning  with
     the  least  significant  bit)  and returns the index of that
     bit.  Bits are numbered starting at one (the least  signifi-
     cant bit).

RETURN VALUES
     The ffs() function returns the index of the first  bit  set.
     If i is 0, then ffs() returns 0.

ERORS
     No errors are defined.

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Standard                    
    
     MT-Level                     MT-Safe                     
    


SEE ALSO
     attributes(5), standards(5)
















SunOS 5.11          Last change: 24 Jul 2002                    1