struct->bit access
Patrick Maupin
pmaupin at speakeasy.net
Tue Sep 14 00:51:25 EDT 2004
> def extract_bit_range_value(data, low_bit, high_bit=None):
> if high_bit == None:
> high_bit = low_bit
>
> high_bit += 1
> return ((int(data) & ( ~(-1L << (high_bit - low_bit) ) << low_bit
> )) >> low_bit)
I ususally do something similar, but a bit simpler:
def extract_bit_range_value(data, low_bit, numbits = 1):
return (data >> low_bit) & ((1 << numbits)-1)
Regards,
Pat
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