11 lines
152 B
C
11 lines
152 B
C
|
ffs(i)
|
||
|
|
register int i;
|
||
|
|
{
|
||
|
|
register int n;
|
||
|
|
|
||
|
|
for (n = 8*sizeof(int); n > 0; n--, i >>= 1)
|
||
|
|
if ((i&1))
|
||
|
|
return (8*sizeof(int) + 1) - n;
|
||
|
|
return -1;
|
||
|
|
}
|