Query: ffs
OS: netbsd
Section: 3
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
FFS(3) BSD Library Functions Manual FFS(3)NAMEffs -- find first bit set in a bit stringLIBRARYStandard C Library (libc, -lc)SYNOPSIS#include <strings.h> int ffs(int value);DESCRIPTIONThe ffs() function finds the first bit set in value and returns the index of that bit. Bits are numbered starting from 1, starting at the right-most bit. A return value of 0 means that the argument was zero.SEE ALSObitstring(3), ffs32(3), popcount(3)STANDARDSThe ffs() function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').HISTORYThe ffs() function appeared in 4.3BSD. The prototype for it existed previously in the <string.h> header before it was moved to <strings.h> for POSIX compliance.BSDApril 28, 2010 BSD
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