Function readCompatInt64

hintfile.go:353–400

(r *bufio.Reader, fieldsRead *int)

}

func readCompatInt64(r *bufio.Reader, fieldsRead *int) (int64, error) {
	var scratch [binary.MaxVarintLen64]byte
	var i int

	for {
		b, err := r.ReadByte()
		if err != nil {
			if err == io.EOF {
				if i == 0 {
					if fieldsRead != nil && *fieldsRead == 0 {
						return 0, io.EOF
					}
					return 0, ErrHintFileCorrupted
				}
				return 0, ErrHintFileCorrupted
			}
			if err == io.ErrUnexpectedEOF {
				return 0, ErrHintFileCorrupted
			}
			return 0, err
		}

		scratch[i] = b
		i++

		if b < 0x80 || i == len(scratch) {
			break
		}
	}

	if i == len(scratch) && scratch[i-1]&0x80 != 0 {
		return 0, ErrHintFileCorrupted
	}

	val, n, err := decodeCompatInt64(scratch[:i])
	if err != nil {
		return 0, err
	}
	if n != i {
		return 0, ErrHintFileCorrupted
	}

	if fieldsRead != nil {
		(*fieldsRead)++
	}

	return val, nil
}

// Close closes the hint file
func (r *HintFileReader) Close() error {