Python Convert bytes to ctypes.Structure

bytes -> ctyeps.Structure

from ctypes import c_int16, c_int32, memmove, pointer, sizeof, Structure
class Data(Structure):
# | a | b | c |
# XX XX XX XX XX XX XX XX
_fields_ = [
("a", c_int16),
("b", c_int16),
("c", c_int32),
]
# Little-endian
# 0x0001 => 0x01 0x00
# 0x0002 => 0x02 0x00
# 0x00000003 => 0x03 0x00 0x00 0x00
dataBytes = bytes([1, 0, 2, 0, 3, 0, 0, 0])
dataSturct = Data()
memmove(pointer(dataSturct), dataBytes, sizeof(dataSturct))
assert dataSturct.a == 1
assert dataSturct.b == 2
assert dataSturct.c == 3

ctypes.Structure -> bytes

from ctypes import c_int16, c_int32, memmove, pointer, sizeof, Structure
class Data(Structure):
# | a | b | c |
# XX XX XX XX XX XX XX XX
_fields_ = [
("a", c_int16),
("b", c_int16),
("c", c_int32),
]
# Little-endian
# 0x0001 => 0x01 0x00
# 0x0002 => 0x02 0x00
# 0x00000003 => 0x03 0x00 0x00 0x00
dataSturct = Data(a=1, b=2, c=3)
dataBytes = bytes(dataSturct)
assert dataBytes[0] == 1
assert dataBytes[2] == 2
assert dataBytes[4] == 3
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