FFS(9) Basic C Library Functions FFS(9) NAME ffs - find first set bit in word SYNOPSIS int ffs(int x); ARGUMENTS x the word to search DESCRIPTION This is defined the same way as the libc and compiler builtin ffs routines, therefore differs in spirit from the other bitops. ffs(value) returns 0 if value is 0 or the position of the first set bit if value is nonzero. The first (least significant) bit is at position 1. COPYRIGHT Kernel Hackers Manual 2.6. November 2013 FFS(9)[top]
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