"Aaron \"Castironpi\" Brady" wrote:
>This is tolerable. Â If you've got a better 'clear' operation than
>'xor', you're welcome to it.
*grin* xor is a toggle bit fuction, and I did not like the recursive
call in your code. so here is a module bsed on your BitSet:
(I hope my tabs survive the journey)
"""
Module with input and output int bit addressable classes.
Loosely based on Castironpi's BitSet code
"""
class inbits(object):
"""
This is a 32 bit int of more or less addressable bits.
"""
def __init__ (self, value = 0,*args ):
"""This constructs the int that keeps the bits,
and makes a getbit function for each named bit from *args,
so that we can retreive them by instance.bitname(),
as well as by bool = instance[index_position]
"""
self.value = value
self.high_values = int('ffffffff',16)
for i,name in enumerate(args):
def __getbit__(idx = i):
# Real i/o code has to be added here to read the right byte
return self.__getitem__(idx)
self.__dict__[name] = __getbit__
def __setitem__( self, index, value ):
"""Here we can set a bit based on its position."""
if value:
self.value |= (1 << index)
else:
self.value &= self.high_values ^ (1 << index)
def __getitem__( self, index ):
"""This retreives a bit based on its position."""
return 1 if self.value & (1<< index ) else 0
def __repr__( self ):
return repr( self.value )
class outbits(object):
"""
This is a 32 bit int of more or less addressable bits.
"""
def __init__ (self, value = 0,*args ):
"""This constructs the int that keeps the bits,
and makes a setbit function for each named bit from *args,
so that we can set them by instance.bitname(bool),
as well as by instance[index_position] = bool
"""
self.value = value
self.high_values = int('ffffffff',16)
for i,name in enumerate(args):
def __setbit__(value,idx = i):
self.__setitem__(idx,value)
# Real i/o code has to be added here to write the right byte out
self.__dict__[name] = __setbit__
def __setitem__( self, index, value ):
"""Here we can set a bit based on its position."""
if value:
self.value |= (1 << index)
else:
self.value &= self.high_values ^ (1 << index)
def __getitem__( self, index ):
"""This retreives a bit based on its position."""
return 1 if self.value & (1<< index ) else 0
def __repr__( self ):
return repr( self.value )
if __name__== '__main__':
ins = inbits(0,'b0','b1','b2','b3','b4','b5','b6','b7')
outs = outbits(0,'b0','b1','b2','b3','b4','b5','b6','b7')
ins[3] = 1
outs.b4(1)
print 'ins now',ins,'outs now',outs,'outs[4] is',outs[4],'ins.b3() is',ins.b3()
Comments are welcome...
- Hendrik
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