Function extra_length_bits

scripts/pyflate.py:234–240

(n)

        raise "illegal distance code"

def extra_length_bits(n):
    if 257 <= n <= 260 or n == 285:
        return 0
    elif 261 <= n <= 284:
        return ((n-257) >> 2) - 1
    else:
        raise "illegal length code"

def move_to_front(l, c):
    l[:] = l[c:c+1] + l[0:c] + l[c+1:]