def num_in_numbits(num, numbits):
"""Does the integer `num` appear in `numbits`?
Returns:
A bool, True if `num` is a member of `numbits`.
"""
nbyte, nbit = divmod(num, 8)
if nbyte >= len(numbits):
return False
return bool(byte_to_int(numbits[nbyte]) & (1 << nbit))
def num_in_numbits(num, numbits):
"""Does the integer `num` appear in `numbits`?
Arguments:
num (integer)
numbits (binary blob)
Returns:
A boolean, true if `num` is a member of `numbits`.
"""
nbyte, nbit = divmod(num, 8)
if nbyte >= len(numbits):
return False
return bool(byte_to_int(numbits[nbyte]) & (1 << nbit))
def __getitem__(self, i):
return byte_to_int(self.code[i])
def good_numbits(numbits):
"""Assert that numbits is good."""
# It shouldn't end with a zero byte, that should have been trimmed off.
assert (not numbits) or (byte_to_int(numbits[-1]) != 0)
def test_binary_bytes(self):
byte_values = [0, 255, 17, 23, 42, 57]
bb = binary_bytes(byte_values)
self.assertEqual(len(bb), len(byte_values))
self.assertEqual(byte_values, list(bytes_to_ints(bb)))
self.assertEqual(byte_values, [byte_to_int(b) for b in bb])
def __getitem__(self, i):
return byte_to_int(self.code[i])
