78 lines
1.8 KiB
Python
78 lines
1.8 KiB
Python
from functools import singledispatch, reduce
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from operator import and_, or_
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from bitarray import bitarray
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import stl.ast
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from stl.boolean_eval import eval_terms, op_lookup
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def pointwise_sat(stl):
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f = pointwise_satf(stl)
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return lambda x, t: bool(int(f(x, [t]).to01()))
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@singledispatch
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def pointwise_satf(stl):
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raise NotImplementedError
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def bool_op(stl, conjunction=False):
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binop = and_ if conjunction else or_
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fs = [pointwise_satf(arg) for arg in stl.args]
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return lambda x, t: reduce(binop, (f(x, t) for f in fs))
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@pointwise_satf.register(stl.Or)
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def _(stl):
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return bool_op(stl, conjunction=False)
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@pointwise_satf.register(stl.And)
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def _(stl):
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return bool_op(stl, conjunction=True)
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def get_times(x, lo, hi, tau):
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return [min(tau + t2, x.index[-1]) for t2 in x[lo:hi].index]
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def temporal_op(stl, lo, hi, conjunction=False):
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fold = bitarray.all if conjunction else bitarray.any
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f = pointwise_satf(stl.arg)
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def sat_comp(x,t):
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return bitarray([fold(f(x, get_times(x, lo, hi, tau))) for tau in t])
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return sat_comp
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@pointwise_satf.register(stl.F)
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def _(stl):
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lo, hi = stl.interval
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return temporal_op(stl, lo, hi, conjunction=False)
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@pointwise_satf.register(stl.G)
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def _(stl):
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lo, hi = stl.interval
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return temporal_op(stl, lo, hi, conjunction=True)
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@pointwise_satf.register(stl.Neg)
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def _(stl):
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return lambda x,t: ~pointwise_satf(stl.arg)(x, t)
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@pointwise_satf.register(stl.AtomicPred)
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def _(stl):
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def sat_comp(x, t):
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sat = bitarray()
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[sat.append(x[str(stl.id)][tau]) for tau in t]
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return sat
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return sat_comp
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@pointwise_satf.register(stl.LinEq)
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def _(stl):
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op = op_lookup[stl.op]
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def sat_comp(x, t):
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sat = bitarray()
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[sat.append(op(eval_terms(stl, x, tau), stl.const)) for tau in t]
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return sat
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return sat_comp
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