def pack_regexp(self, pkt, fragments, **k):
value = getattr(pkt, self.field_name)
is_literal = not isinstance(value, Any)
if is_literal:
self.pack(pkt, fragments, **k)
else:
f = FragmentsOfRegexps()
try:
self.prototype_field.pack_regexp(pkt, f, **k)
subregexp = f.assemble_regexp()
except:
subregexp = ".*"
fragments.append("(%s)?" % subregexp, is_literal=False)
return fragments
def as_regular_expression(self, debug=False):
fragments = FragmentsOfRegexps()
stack = []
self.as_regular_expression_impl(fragments, stack)
return re.compile("(?s)" + fragments.assemble_regexp(), re.DEBUG if debug else 0)
