def test_exact_log2(self):
"""Util.number.exact_log2"""
self.assertRaises(TypeError, number.exact_log2, "0")
self.assertRaises(ValueError, number.exact_log2, -1)
self.assertRaises(ValueError, number.exact_log2, 0)
self.assertEqual(0, number.exact_log2(1))
self.assertEqual(1, number.exact_log2(2))
self.assertRaises(ValueError, number.exact_log2, 3)
self.assertEqual(2, number.exact_log2(4))
self.assertRaises(ValueError, number.exact_log2, 5)
self.assertRaises(ValueError, number.exact_log2, 6)
self.assertRaises(ValueError, number.exact_log2, 7)
e = 3
n = 8
while e < 16:
if n == 2**e:
self.assertEqual(e, number.exact_log2(n),
"expected=2**%d, n=%d" % (e, n))
e += 1
else:
self.assertRaises(ValueError, number.exact_log2, n)
n += 1
for e in range(16, 1 + 64, 2):
self.assertRaises(ValueError, number.exact_log2, 2**e - 1)
self.assertEqual(e, number.exact_log2(2**e))
self.assertRaises(ValueError, number.exact_log2, 2**e + 1)
def test_exact_log2(self):
"""Util.number.exact_log2"""
self.assertRaises(TypeError, number.exact_log2, "0")
self.assertRaises(ValueError, number.exact_log2, -1)
self.assertRaises(ValueError, number.exact_log2, 0)
self.assertEqual(0, number.exact_log2(1))
self.assertEqual(1, number.exact_log2(2))
self.assertRaises(ValueError, number.exact_log2, 3)
self.assertEqual(2, number.exact_log2(4))
self.assertRaises(ValueError, number.exact_log2, 5)
self.assertRaises(ValueError, number.exact_log2, 6)
self.assertRaises(ValueError, number.exact_log2, 7)
e = 3
n = 8
while e < 16:
if n == 2**e:
self.assertEqual(e, number.exact_log2(n), "expected=2**%d, n=%d" % (e, n))
e += 1
else:
self.assertRaises(ValueError, number.exact_log2, n)
n += 1
for e in range(16, 1+64, 2):
self.assertRaises(ValueError, number.exact_log2, 2**e-1)
self.assertEqual(e, number.exact_log2(2**e))
self.assertRaises(ValueError, number.exact_log2, 2**e+1)
def __init__(self):
self.counter = Counter.new(nbits=self.block_size * 8, initial_value=0, little_endian=True)
self.key = None
self.block_size_shift = exact_log2(self.block_size)
assert 1 << self.block_size_shift == self.block_size
self.blocks_per_key = exact_div(self.key_size, self.block_size)
assert self.key_size == self.blocks_per_key * self.block_size
self.max_bytes_per_request = self.max_blocks_per_request * self.block_size
def __init__(self):
self.counter = Counter.new(nbits=self.block_size * 8,
initial_value=0,
little_endian=True)
self.key = None
self.block_size_shift = exact_log2(self.block_size)
self.blocks_per_key = exact_div(self.key_size, self.block_size)
self.max_bytes_per_request = self.max_blocks_per_request * self.block_size
return
def __init__(self):
self.counter = Counter.new(nbits=self.block_size*8, initial_value=0, little_endian=True)
self.key = None
# Set some helper constants
self.block_size_shift = exact_log2(self.block_size)
assert (1 << self.block_size_shift) == self.block_size
self.blocks_per_key = exact_div(self.key_size, self.block_size)
assert self.key_size == self.blocks_per_key * self.block_size
self.max_bytes_per_request = self.max_blocks_per_request * self.block_size
