ffs

Langue: en

Autres versions - même langue

Version: June 2009 (debian - 07/07/09)

Autres sections - même nom

Section: 9 (Appels noyau Linux)

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.