That just looks like a convenience function to me. Rather than passing 1,2,4,8,16 in as the value of N, you pass in 0,1,2,3,4. Has the benefit that it's not pos

That just looks like a convenience function to me. Rather than passing 1,2,4,8,16 in as the value of N, you pass in 0,1,2,3,4. Has the benefit that it's not possible to pass in a number that's not a power of 2 (which might not be valid, I don't know how scrypt works).