ffs(3) Library Functions Manual ffs(3)
NAME
ffs - Finds first set bit
LIBRARY
Standard C Library (libc.so, libc.a)
SYNOPSIS
#include <strings.h>
int ffs(
int pattern);
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
ffs(): XPG4-UNIX
Refer to the standards(5) reference page for more information about industry standards and associated tags.
PARAMETERS
Specifies the bit pattern searched.
DESCRIPTION
The ffs() function finds the first bit set (beginning with the least significant bit) and returns the index of that bit. Bits are numbered
starting at 1 (the least significant bit). If pattern is 0 (zero), ffs() returns 0.
RELATED INFORMATION
Standards: standards(5)
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ffs(3)
