Method encode

encoder.go:165–209

encode data as one or more segments and return the encoded data. The returned data does not include the terminator bit sequence.

(data []byte)

//
// The returned data does not include the terminator bit sequence.
func (d *dataEncoder) encode(data []byte) (*bitset.Bitset, error) {
	d.data = data
	d.actual = nil
	d.optimised = nil

	if len(data) == 0 {
		return nil, errors.New("no data to encode")
	}

	// Classify data into unoptimised segments.
	highestRequiredMode := d.classifyDataModes()

	// Optimise segments.
	err := d.optimiseDataModes()
	if err != nil {
		return nil, err
	}

	// Check if a single byte encoded segment would be more efficient.
	optimizedLength := 0
	for _, s := range d.optimised {
		length, err := d.encodedLength(s.dataMode, len(s.data))
		if err != nil {
			return nil, err
		}
		optimizedLength += length
	}

	singleByteSegmentLength, err := d.encodedLength(highestRequiredMode, len(d.data))
	if err != nil {
		return nil, err
	}

	if singleByteSegmentLength <= optimizedLength {
		d.optimised = []segment{segment{dataMode: highestRequiredMode, data: d.data}}
	}

	// Encode data.
	encoded := bitset.New()
	for _, s := range d.optimised {
		d.encodeDataRaw(s.data, s.dataMode, encoded)
	}

	return encoded, nil
}

// classifyDataModes classifies the raw data into unoptimised segments.
// e.g. "123ZZ#!#!" =>