Method valueDecoder

pager_lib/pyasn1/codec/ber/decoder.py:1186–1235

(self, substrate, asn1Spec,
                     tagSet=None, length=None, state=None,
                     decodeFun=None, substrateFun=None,
                     **options)

    protoComponent = univ.Choice()

    def valueDecoder(self, substrate, asn1Spec,
                     tagSet=None, length=None, state=None,
                     decodeFun=None, substrateFun=None,
                     **options):
        if asn1Spec is None:
            asn1Object = self.protoComponent.clone(tagSet=tagSet)

        else:
            asn1Object = asn1Spec.clone()

        if substrateFun:
            for chunk in substrateFun(asn1Object, substrate, length, options):
                yield chunk

            return

        options = self._passAsn1Object(asn1Object, options)

        if asn1Object.tagSet == tagSet:
            if LOG:
                LOG('decoding %s as explicitly tagged CHOICE' % (tagSet,))

            for component in decodeFun(
                    substrate, asn1Object.componentTagMap, **options):
                if isinstance(component, SubstrateUnderrunError):
                    yield component

        else:
            if LOG:
                LOG('decoding %s as untagged CHOICE' % (tagSet,))

            for component in decodeFun(
                    substrate, asn1Object.componentTagMap, tagSet, length,
                    state, **options):
                if isinstance(component, SubstrateUnderrunError):
                    yield component

        effectiveTagSet = component.effectiveTagSet

        if LOG:
            LOG('decoded component %s, effective tag set %s' % (component, effectiveTagSet))

        asn1Object.setComponentByType(
            effectiveTagSet, component,
            verifyConstraints=False,
            matchTags=False, matchConstraints=False,
            innerFlag=False
        )

        yield asn1Object

    def indefLenValueDecoder(self, substrate, asn1Spec,
                             tagSet=None, length=None, state=None,