ffs(3C)                           SDK R4.11                          ffs(3C)


NAME
       ffs - find first set bit

SYNOPSIS
       #include <string.h>
       int ffs(const int i);

DESCRIPTION
       ffs finds the first bit set in the argument passed it and returns the
       index of that bit.  Bits are numbered starting at 1 from the low
       order bit.  A return value of zero indicates that the value passed is
       zero.

   Considerations for Threads Programming
                     +---------+-----------------------------+
                     |         |                      async- |
                     |function | reentrant   cancel   cancel |
                     |         |             point     safe  |
                     +---------+-----------------------------+
                     |ffs      |     Y         N        N    |
                     +---------+-----------------------------+
SEE ALSO
       reentrant(3), string(3C).


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