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FFS
Section: Linux Programmer's Manual (3)Updated: 2001-12-20
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NAME
ffs - find first bit set in a wordSYNOPSIS
#include <strings.h> int ffs(int i);
DESCRIPTION
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 position e.g. 32 or 64.RETURN VALUE
The ffs() function returns the position of the first bit set, or 0 if no bits are set.CONFORMING TO
BSD 4.3, POSIX 1003.1-2001.NOTES
BSD systems have a prototype in <string.h>.