decoder.py 文件源码

def valueDecoder(self, fullSubstrate, substrate, asn1Spec, tagSet,
                     length, state, decodeFun, substrateFun):
        head, tail = substrate[:length], substrate[length:]
        r = self._createComponent(asn1Spec, tagSet)
        if head:
            raise error.PyAsn1Error('Unexpected %d-octet substrate for Null' % length)
        return r, tail