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Linux 2.6 - man page for ffs (linux section 3posix)

FFS(P)				    POSIX Programmer's Manual				   FFS(P)

NAME
       ffs - find first set bit

SYNOPSIS
       #include <strings.h>

       int ffs(int i);

DESCRIPTION
       The ffs() function shall find the first bit set (beginning with the least significant bit)
       in i, and return the index of that bit. Bits are numbered starting at one (the least  sig-
       nificant bit).

RETURN VALUE
       The  ffs()  function  shall  return the index of the first bit set.  If i is 0, then ffs()
       shall return 0.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       The Base Definitions volume of IEEE Std 1003.1-2001, <strings.h>

COPYRIGHT
       Portions of this text are reprinted and	reproduced  in	electronic  form  from	IEEE  Std
       1003.1,	2003  Edition,	Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003  by
       the  Institute  of  Electrical  and  Electronics Engineers, Inc and The Open Group. In the
       event of any discrepancy between this version and the original IEEE  and  The  Open  Group
       Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003					   FFS(P)


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