ffs, ffsl, ffsll — find first set bit
The ffs(), ffsl(), and ffsll() functions shall find the first bit set (beginning with the least significant bit) in i, and return the index of that bit. Bits are numbered starting at one (the least significant bit).
The ffs(), ffsl(), and ffsll() functions shall return the index of the first bit set. If i is 0, then these functions shall return 0.
No errors are defined.
None.
None.
None.
None.
XBD <strings.h>
First released in Issue 4, Version 2.
Moved from X/OPEN UNIX extension to BASE.
Austin Group Defect 617 is applied, adding ffsl() and ffsll().
return to top of page