Here again is example:
from ctypes import *
class REG_INFO(Structure):
_fields_ = [
('address', c_ubyte),
('message', c_char * 256),
('size', c_ubyte)
]
class myclass(object):
#
# def __new__(class_, init_val, size, reg_info):
def __init__(self, init_val, size, reg_info):
# self = object.__new__(class_)
self.reg_info = reg_info
print self.reg_info.message
self.val = self
self.size = reg_info.size
print 'address = 0x%02X' % self.reg_info.address
# return self
#
def __getitem__(self, index): # gets a single bit
if index >= self.size:
return self.val
return (self.val >> index) & 1
#
def __get__(self): # gets a single bit
return self.val
#
def __setitem__(self,index,value): # sets a single bit
if index >= self.size:
self.val = value
return
value = (value&1L)<<index
mask = (1L)<<index
self.val = (self.val & ~mask) | value
return
#
def __int__(self):
return self.val
#
def __long__(self):
return long(self.val)
#
#
# setup
my_reg = REG_INFO()
my_reg.address = 0xab
my_reg.message = 'hello world'
print 'TEST 1'
dog = 0x123456789ABCDEF0
print 'type(dog) = %s' % type(dog)
print 'dog val = 0x%016X' % dog
print 'TEST 2'
cat = myclass(0x55, 32, my_reg)
print 'type(cat) = %s' % type(cat)
print 'cat val = 0x%016X' % cat
print 'TEST 3'
bird = myclass(dog, 32, my_reg)
print 'type(bird) = %s' % type(bird)
print 'bird val = 0x%016X' % bird
print 'TEST 4'
print bird
print 'bird[0] val = 0x%01X' % bird[0]
bird[0] = ~bird[0]
print 'bird val = 0x%016X' % bird
print 'bird[0] val = 0x%01X' % bird[0]
bird[0]
Here is how it currently runs:
C:\path...
TEST 1
type(dog) = <type 'long'>
dog val = 0x123456789ABCDEF0
TEST 2
hello world
address = 0xAB
type(cat) = <class '__main__.myclass'>
Traceback (most recent call last):
File "C:\path... \bignum5.py", line 62, in <module>
print 'cat val = 0x%016X' % cat
TypeError: int argument required
Thanks,
Mark
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