Message 88145 - Python tracker (original) (raw)

After reading the documentation for ctypes (specifically "Bit fields are only possible for integer fields" from section 16.15.1.12) I've updated the test.

import ctypes import time

class uint(ctypes.BigEndianStructure): pack = 1 # aligned to 8 bits, not ctypes default of 32 fields = [ ("Data0", ctypes.c_uint, 31), ("Data1", ctypes.c_uint, 32), ]

class ulonglong(ctypes.BigEndianStructure): pack = 1 # aligned to 8 bits, not ctypes default of 32 fields = [ ("Data0", ctypes.c_ulonglong, 31), ("Data1", ctypes.c_ulonglong, 32), ]

size_of_structures_in_bytes = 8

def castbytes(type): buffer = (ctypes.c_byte * size_of_structures_in_bytes)() for index in range(size_of_structures_in_bytes): buffer[index] = 0x55 return ctypes.cast(ctypes.pointer(buffer), ctypes.POINTER(type)).contents

def print_members(test): print("Data0 is 0x%X, Data1 is 0x%X for %s"%(test.Data0, test.Data1, test.class.name))

test_classes = [ uint, ulonglong]

Failed = False tests = [castbytes(type) for type in test_classes] for test in tests: print_members(test)

if not tests[0].Data0 == tests[1].Data0 == 0x2AAAAAAA: Failed = True print("Data0 failed") if not tests[0].Data1 == tests[1].Data1 == 0xAAAAAAAA: Failed = True print("Data1 failed")

if not Failed: print("Passed")