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FFS(3)                      BSD Programmer's Manual                     FFS(3)

N\bNA\bAM\bME\bE
     f\bff\bfs\bs - find first bit set in a bit string

S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
     #\b#i\bin\bnc\bcl\blu\bud\bde\be <\b<s\bst\btr\bri\bin\bng\bg.\b.h\bh>\b>

     _\bi_\bn_\bt
     f\bff\bfs\bs(_\bi_\bn_\bt _\bv_\ba_\bl_\bu_\be);

D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
     The f\bff\bfs\bs() fucntion finds the first bit set in _\bv_\ba_\bl_\bu_\be 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.

S\bSE\bEE\bE A\bAL\bLS\bSO\bO
     bitstring(3)

H\bHI\bIS\bST\bTO\bOR\bRY\bY
     The f\bff\bfs\bs() function appeared in 4.3BSD.

4.4BSD                           June 4, 1993                                1
Commit	Line	Data
8bb980a3 C	1	FFS(3) BSD Programmer's Manual FFS(3)
	2
	3	N\bNA\bAM\bME\bE
	4	f\bff\bfs\bs - find first bit set in a bit string
	5
	6	S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
	7	#\b#i\bin\bnc\bcl\blu\bud\bde\be <\b<s\bst\btr\bri\bin\bng\bg.\b.h\bh>\b>
	8
	9	_\bi_\bn_\bt
	10	f\bff\bfs\bs(_\bi_\bn_\bt _\bv_\ba_\bl_\bu_\be);
	11
	12	D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
	13	The f\bff\bfs\bs() fucntion finds the first bit set in _\bv_\ba_\bl_\bu_\be and returns the index
	14	of that bit. Bits are numbered starting from 1, starting at the right-
	15	most bit. A return value of 0 means that the argument was zero.
	16
	17	S\bSE\bEE\bE A\bAL\bLS\bSO\bO
	18	bitstring(3)
	19
	20	H\bHI\bIS\bST\bTO\bOR\bRY\bY
	21	The f\bff\bfs\bs() function appeared in 4.3BSD.
	22
	23	4.4BSD June 4, 1993 1