ffs(3C) UNIX System V(C Development Set) 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.
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