本文整理汇总了Python中binascii.crc_hqx方法的典型用法代码示例。如果您正苦于以下问题：Python binascii.crc_hqx方法的具体用法？Python binascii.crc_hqx怎么用？Python binascii.crc_hqx使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类binascii的用法示例。
在下文中一共展示了binascii.crc_hqx方法的13个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: from_bytes
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def from_bytes(data: bytes) -> "Packet":
if len(data) < 1 + 2 + 1 + 2:
raise ValueError("packet too short")
magic, _, payload, checksum = data[0], data[1:3], data[4:-2], data[-2:]
if magic != ord(HUAWEI_LPV2_MAGIC):
raise ValueError(f"magic mismatch: {magic} != {HUAWEI_LPV2_MAGIC}")
actual_checksum = encode_int(binascii.crc_hqx(data[:-2], 0))
if actual_checksum != checksum:
raise ValueError(f"checksum mismatch: {actual_checksum} != {checksum}")
return Packet(service_id=payload[0], command_id=payload[1], command=Command.from_bytes(payload[2:])) 示例2: test_returned_value
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def test_returned_value(self):
# Limit to the minimum of all limits (b2a_uu)
MAX_ALL = 45
raw = self.rawdata[:MAX_ALL]
for fa, fb in zip(a2b_functions, b2a_functions):
a2b = getattr(binascii, fa)
b2a = getattr(binascii, fb)
try:
a = b2a(self.type2test(raw))
res = a2b(self.type2test(a))
except Exception as err:
self.fail("{}/{} conversion raises {!r}".format(fb, fa, err))
if fb == 'b2a_hqx':
# b2a_hqx returns a tuple
res, _ = res
self.assertEqual(res, raw, "{}/{} conversion: "
"{!r} != {!r}".format(fb, fa, res, raw))
self.assertIsInstance(res, bytes)
self.assertIsInstance(a, bytes)
self.assertLess(max(a), 128)
self.assertIsInstance(binascii.crc_hqx(raw, 0), int)
self.assertIsInstance(binascii.crc32(raw), int) 示例3: crccalc
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def crccalc(command):
"""returns crc as integer from binary string command"""
crc=binascii.crc_hqx(command,0)
crchi=crc>>8
crclo=crc&255
if crchi == 0x28 or crchi==0x0d or crchi==0x0a:
crc+=256
if crclo == 0x28 or crclo==0x0d or crclo==0x0a:
crc+=1
return crc 示例4: crccalc
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def crccalc(self,command):
"""returns crc as integer from binary string command"""
crc=binascii.crc_hqx(command,0)
crchi=crc>>8
crclo=crc&255
if crchi == 0x28 or crchi==0x0d or crchi==0x0a:
crc+=256
if crclo == 0x28 or crclo==0x0d or crclo==0x0a:
crc+=1
return crc 示例5: _write
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def _write(self, data):
self.crc = binascii.crc_hqx(data, self.crc)
self.ofp.write(data) 示例6: _writecrc
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def _writecrc(self):
# XXXX Should this be here??
# self.crc = binascii.crc_hqx('\0\0', self.crc)
if self.crc < 0:
fmt = '>h'
else:
fmt = '>H'
self.ofp.write(struct.pack(fmt, self.crc))
self.crc = 0 示例7: _read
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def _read(self, len):
data = self.ifp.read(len)
self.crc = binascii.crc_hqx(data, self.crc)
return data 示例8: _checkcrc
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def _checkcrc(self):
filecrc = struct.unpack('>h', self.ifp.read(2))[0] & 0xffff
#self.crc = binascii.crc_hqx('\0\0', self.crc)
# XXXX Is this needed??
self.crc = self.crc & 0xffff
if filecrc != self.crc:
raise Error, 'CRC error, computed %x, read %x' \
%(self.crc, filecrc)
self.crc = 0 示例9: __bytes__
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def __bytes__(self) -> bytes:
payload = bytes([self.service_id, self.command_id]) + bytes(self.command)
if len(payload) > 2 ** (8 * 2):
raise ValueError(f"payload too large: {len(payload)}")
data = HUAWEI_LPV2_MAGIC + encode_int(len(payload) + 1) + b"\0" + payload
return data + encode_int(binascii.crc_hqx(data, 0)) 示例10: test_crc_hqx
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def test_crc_hqx(self):
crc = binascii.crc_hqx(self.type2test(b"Test the CRC-32 of"), 0)
crc = binascii.crc_hqx(self.type2test(b" this string."), crc)
self.assertEqual(crc, 14290)
self.assertRaises(TypeError, binascii.crc_hqx)
self.assertRaises(TypeError, binascii.crc_hqx, self.type2test(b'')) 示例11: __init__
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def __init__(self, filename):
self.data = open(filename, 'rb').read()
stored_crc16, size0, size1, size2 = struct.unpack('<HHHH', self.data[:8])
calc_crc16 = binascii.crc_hqx(self.data[2:], 0xffff)
if calc_crc16 != stored_crc16:
raise ValueError("Unexpected CRC, found %04X but calculated %04X" % (stored_crc16, calc_crc16))
self.sizes = (size0, size1, size2) 示例12: crc
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def crc(cls, framing, data):
'''CRC-16 with an initial value that depends on the packet format'''
return binascii.crc_hqx(data, cls.formats[framing]['initial_crc_value']) 示例13: test_empty_string
# 需要导入模块: import binascii [as 别名]
# 或者: from binascii import crc_hqx [as 别名]
def test_empty_string(self):
# A test for SF bug #1022953. Make sure SystemError is not raised.
empty = self.type2test('')
for func in all_functions:
if func == 'crc_hqx':
# crc_hqx needs 2 arguments
binascii.crc_hqx(empty, 0)
continue
f = getattr(binascii, func)
try:
f(empty)
except Exception, err:
self.fail("{}({!r}) raises {!r}".format(func, empty, err))