ffs - find first bit set in a word
int ffs(int i);
The ffs() function returns the position of the first bit set in the
word i. The least significant bit is position 1 and the most significant
The ffs() function returns the position of the first bit set, or 0 if
no bits are set.
BSD 4.3, SUSv2
According to SUSv2, this function is defined in <strings.h>.
GNU 1993-04-13 FFS(3)
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