26 lines
727 B
Python
26 lines
727 B
Python
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# -*- coding: utf-8 -*-
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class bf(object):
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def __init__(self,value=0):
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self._d = value
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def __getitem__(self, index):
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return (self._d >> index) & 1
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def __setitem__(self,index,value):
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value = (value&1L)<<index
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mask = (1L)<<index
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self._d = (self._d & ~mask) | value
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def __getslice__(self, start, end):
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mask = 2L**(end - start) -1
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return (self._d >> start) & mask
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def __setslice__(self, start, end, value):
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mask = 2L**(end - start) -1
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value = (value & mask) << start
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mask = mask << start
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self._d = (self._d & ~mask) | value
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return (self._d >> start) & mask
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def __int__(self):
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return self._d
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