Method DecodeTag

decoder.go:130–143

DecodeTag decodes a field tag and Protobuf wire type from the stream and returns the values. io.ErrUnexpectedEOF is returned if the operation would read past the end of the data.

()

//
// io.ErrUnexpectedEOF is returned if the operation would read past the end of the data.
func (d *Decoder) DecodeTag() (tag int, wireType WireType, err error) {
	if d.offset >= len(d.p) {
		return 0, WireTypeVarint, io.ErrUnexpectedEOF
	}
	v, n, err := DecodeVarint(d.p[d.offset:])
	if err != nil {
		return 0, -1, fmt.Errorf("invalid data at byte %d: %w", d.offset, err)
	}
	if n < 1 || v < 1 || v > MaxTagValue {
		return 0, -1, fmt.Errorf("invalid tag value (%d) at byte %d: %w", v, d.offset, ErrInvalidFieldTag)
	}
	d.offset += n
	return int(v >> 3), WireType(v & 0x7), nil
}

// DecodeBool decodes a boolean value from the stream and returns the value.
//