Function prettyPrintInvertedIndexKey

pkg/util/encoding/encoding.go:867–913

prettyPrintInvertedIndexKey returns a string representation of the path part of a JSON inverted index.

(b []byte)

// prettyPrintInvertedIndexKey returns a string representation of the path part of a JSON inverted
// index.
func prettyPrintInvertedIndexKey(b []byte) (string, []byte, error) {
	outBytes := ""
	// We're skipping the first byte because it's the JSON tag.
	tempB := b[1:]
	for {
		i := bytes.IndexByte(tempB, escape)

		if i == -1 {
			return "", nil, errors.Errorf("did not find terminator %#x in buffer %#x", escape, b)
		}
		if i+1 >= len(tempB) {
			return "", nil, errors.Errorf("malformed escape in buffer %#x", b)
		}

		switch tempB[i+1] {
		case escapedTerm:
			if len(tempB[:i]) > 0 {
				outBytes = outBytes + strconv.Quote(UnsafeConvertBytesToString(tempB[:i]))
			} else {
				lenOut := len(outBytes)
				if lenOut > 1 && outBytes[lenOut-1] == '/' {
					outBytes = outBytes[:lenOut-1]
				}
			}
			return outBytes, tempB[i+escapeLength:], nil
		case escapedJSONObjectKeyTerm:
			outBytes = outBytes + strconv.Quote(UnsafeConvertBytesToString(tempB[:i])) + "/"
		case escapedJSONArray:
			outBytes = outBytes + "Arr/"
			if i+2 >= len(tempB) {
				// The key ends in an escaped JSON array byte, which is used in
				// spans to scan over non-empty arrays.
				return outBytes, nil, nil
			}
		case escaped00:
			if i+2 >= len(tempB) {
				// The key ends in an escaped NULL byte.
				return outBytes, nil, nil
			}
		default:
			return "", nil, errors.Errorf("malformed escape in buffer %#x", b)

		}

		tempB = tempB[i+escapeLength:]
	}
}

// UnsafeConvertStringToBytes converts a string to a byte array to be used with
// string encoding functions. Note that the output byte array should not be