71 lines
2.4 KiB
Python
71 lines
2.4 KiB
Python
from logics.param_constr import *
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from z3 import And, Not, Or
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class ParamConstr_Encoder(object):
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"""Class for encoding parameter constraints"""
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def __init__(self, smt_checker):
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self.smt_checker = smt_checker
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self.rs = smt_checker.rs
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# self.v = None
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# self.v_ctx = None
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# self.loop_position = None
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def load_variables(self, var_rs, var_ctx, var_loop_pos):
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self.v = var_rs
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self.v_ctx = var_ctx
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self.loop_position = var_loop_pos
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def encode(self, param_constr):
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if not param_constr:
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raise RuntimeError("param_constr is None")
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if param_constr.f_type == ParamConstraint_oper.param_entity:
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return self.smt_checker.get_enc_param(
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param_constr.param.name, param_constr.entity)
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if param_constr.f_type == ParamConstraint_oper.true:
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return True
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if param_constr.f_type == ParamConstraint_oper.l_and:
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return And(self.encode(param_constr.left_operand),
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self.encode(param_constr.right_operand))
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if param_constr.f_type == ParamConstraint_oper.l_or:
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return Or(self.encode(param_constr.left_operand),
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self.encode(param_constr.right_operand))
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if param_constr.f_type == ParamConstraint_oper.l_not:
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return Not(self.encode(param_constr.left_operand))
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if param_constr.f_type == ParamConstraint_oper.lt:
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return self.encode(
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param_constr.left_operand) < int(
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param_constr.right_operand)
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if param_constr.f_type == ParamConstraint_oper.le:
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return self.encode(
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param_constr.left_operand) <= int(
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param_constr.right_operand)
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if param_constr.f_type == ParamConstraint_oper.eq:
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return self.encode(
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param_constr.left_operand) == int(
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param_constr.right_operand)
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if param_constr.f_type == ParamConstraint_oper.ge:
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return self.encode(
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param_constr.left_operand) >= int(
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param_constr.right_operand)
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if param_constr.f_type == ParamConstraint_oper.gt:
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return self.encode(
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param_constr.left_operand) > int(
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param_constr.right_operand)
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assert False, "Unsupported case {:s}".format(param_constr.f_type)
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