def _z3expr(self, printable):
## z3str has a weird way of encoding string constants.
## for printing, we make strings look like nice constants,
## but otherwise we use z3str's encoding plan.
if printable:
return z3.Const('"%s"' % self.v, z3str.StringSort())
enc = "__cOnStStR_" + "".join(["_x%02x" % ord(c) for c in self.v])
return z3.Const(enc, z3str.StringSort())
def fork_and_check_worker(constr, conn):
z3e = z3expr(constr)
(ok, z3m) = z3str.check_and_model(z3e)
m = {}
if ok == z3.sat:
for k in z3m:
v = z3m[k]
if v.sort() == z3.IntSort():
m[str(k)] = v.as_long()
elif v.sort() == z3str.StringSort():
# print "Model string %s: %s" % (k, v)
vs = str(v)
if not vs.startswith('__cOnStStR_'):
if not str(k).startswith('_t_'):
print 'Undecodable string constant (%s): %s' % (k, vs)
continue
hexbytes = vs.split('_x')[1:]
bytes = [int(h, 16) for h in hexbytes]
m[str(k)] = ''.join(chr(x) for x in bytes)
else:
raise Exception("Unknown sort for %s=%s: %s" % (k, v, v.sort()))
conn.send((ok, m))
conn.close()
def _z3expr(self, printable):
return z3.Const(self.id, z3str.StringSort())
