Method encodeValue

pager_lib/pyasn1/codec/cer/encoder.py:45–100

(self, value, asn1Spec, encodeFun, **options)

    MAX_LENGTH = 19

    def encodeValue(self, value, asn1Spec, encodeFun, **options):
        # CER encoding constraints:
        # - minutes are mandatory, seconds are optional
        # - sub-seconds must NOT be zero / no meaningless zeros
        # - no hanging fraction dot
        # - time in UTC (Z)
        # - only dot is allowed for fractions

        if asn1Spec is not None:
            value = asn1Spec.clone(value)

        numbers = value.asNumbers()

        if self.PLUS_CHAR in numbers or self.MINUS_CHAR in numbers:
            raise error.PyAsn1Error('Must be UTC time: %r' % value)

        if numbers[-1] != self.Z_CHAR:
            raise error.PyAsn1Error('Missing "Z" time zone specifier: %r' % value)

        if self.COMMA_CHAR in numbers:
            raise error.PyAsn1Error('Comma in fractions disallowed: %r' % value)

        if self.DOT_CHAR in numbers:

            isModified = False

            numbers = list(numbers)

            searchIndex = min(numbers.index(self.DOT_CHAR) + 4, len(numbers) - 1)

            while numbers[searchIndex] != self.DOT_CHAR:
                if numbers[searchIndex] == self.ZERO_CHAR:
                    del numbers[searchIndex]
                    isModified = True

                searchIndex -= 1

            searchIndex += 1

            if searchIndex < len(numbers):
                if numbers[searchIndex] == self.Z_CHAR:
                    # drop hanging comma
                    del numbers[searchIndex - 1]
                    isModified = True

            if isModified:
                value = value.clone(numbers)

        if not self.MIN_LENGTH < len(numbers) < self.MAX_LENGTH:
            raise error.PyAsn1Error('Length constraint violated: %r' % value)

        options.update(maxChunkSize=1000)

        return encoder.OctetStringEncoder.encodeValue(
            self, value, asn1Spec, encodeFun, **options
        )