decoder.py 文件源码

def indefLenValueDecoder(self, fullSubstrate, substrate, asn1Spec, tagSet,
                             length, state, decodeFun, substrateFun):
        if asn1Spec is not None and tagSet == asn1Spec.getTagSet():
            # tagged Any type -- consume header substrate
            header = ''
        else:
            # untagged Any, recover header substrate
            header = fullSubstrate[:-len(substrate)]

        r = self._createComponent(asn1Spec, tagSet, header)

        # Any components do not inherit initial tag
        asn1Spec = self.protoComponent

        if substrateFun:
            return substrateFun(r, substrate, length)
        while substrate:
            component, substrate = decodeFun(substrate, asn1Spec, allowEoo=True)
            if eoo.endOfOctets.isSameTypeWith(component) and \
                    component == eoo.endOfOctets:
                break
            r = r + component
        else:
            raise error.SubstrateUnderrunError(
                'No EOO seen before substrate ends'
                )
        return r, substrate

# character string types