def _test_from_reader(self, array_traits, array_values):
array = Array(array_traits, array_values)
writer = BitStreamWriter()
array.write(writer)
reader = BitStreamReader(writer.byte_array)
read_array = Array.from_reader(array_traits, reader, len(array_values))
self.assertEqual(array, read_array)
def _test_array_auto(self, array_traits, array_values, expected_bitsize):
for i in range(8):
array = Array(array_traits, array_values, is_auto=True)
bitsize = array.bitsizeof(i)
self.assertEqual(expected_bitsize, bitsize, i)
self.assertEqual(i + bitsize, array.initialize_offsets(i), i)
writer = BitStreamWriter()
if i > 0:
writer.write_bits(0, i)
array.write(writer)
self.assertEqual(i + bitsize, writer.bitposition, i)
from_reader = BitStreamReader(writer.byte_array,
writer.bitposition)
self.assertEqual(0, from_reader.read_bits(i))
read_array_from_reader = Array.from_reader(array_traits,
from_reader,
is_auto=True)
self.assertEqual(array, read_array_from_reader, i)
reader = BitStreamReader(writer.byte_array, writer.bitposition)
if i > 0:
self.assertEqual(0, reader.read_bits(i))
read_array = Array(array_traits, is_auto=True)
read_array.read(reader)
self.assertEqual(array, read_array, i)
def _test_array_implicit(self, array_traits, array_values,
expected_bitsize):
for i in range(8):
array = Array(array_traits, array_values, is_implicit=True)
bitsize = array.bitsizeof(i)
self.assertEqual(expected_bitsize, bitsize, i)
self.assertEqual(i + bitsize, array.initialize_offsets(i), i)
writer = BitStreamWriter()
if i > 0:
writer.write_bits(0, i)
array.write(writer)
self.assertEqual(i + bitsize, writer.bitposition, i)
from_reader = BitStreamReader(writer.byte_array,
writer.bitposition)
if i > 0:
self.assertEqual(0, from_reader.read_bits(i))
if array_traits.HAS_BITSIZEOF_CONSTANT:
read_array_from_reader = Array.from_reader(array_traits,
from_reader,
is_implicit=True)
self.assertEqual(array, read_array_from_reader, i)
else:
with self.assertRaises(PythonRuntimeException):
Array.from_reader(array_traits,
from_reader,
is_implicit=True)
reader = BitStreamReader(writer.byte_array, writer.bitposition)
if i > 0:
self.assertEqual(0, reader.read_bits(i))
read_array = Array(array_traits, is_implicit=True)
if array_traits.HAS_BITSIZEOF_CONSTANT:
read_array.read(reader)
self.assertEqual(array, read_array, i)
else:
with self.assertRaises(PythonRuntimeException):
read_array.read(reader)
def _test_array_aligned(self, array_traits, array_values,
expected_bitsize):
for i in range(8):
array = Array(array_traits,
array_values,
set_offset_method=ArrayTest._set_offset_method,
check_offset_method=ArrayTest._check_offset_method)
bitsize = array.bitsizeof(i)
self.assertEqual(alignto(8, i) - i + expected_bitsize, bitsize, i)
self.assertEqual(i + bitsize, array.initialize_offsets(i), i)
writer = BitStreamWriter()
if i > 0:
writer.write_bits(0, i)
array.write(writer)
self.assertEqual(i + bitsize, writer.bitposition, i)
from_reader = BitStreamReader(writer.byte_array,
writer.bitposition)
self.assertEqual(0, from_reader.read_bits(i))
read_array_from_reader = Array.from_reader(
array_traits,
from_reader,
len(array_values),
set_offset_method=ArrayTest._set_offset_method,
check_offset_method=ArrayTest._check_offset_method)
self.assertEqual(array, read_array_from_reader, i)
reader = BitStreamReader(writer.byte_array, writer.bitposition)
if i > 0:
self.assertEqual(0, reader.read_bits(i))
read_array = Array(
array_traits,
set_offset_method=ArrayTest._set_offset_method,
check_offset_method=ArrayTest._check_offset_method)
read_array.read(reader, len(array_values))
self.assertEqual(array, read_array, i)