func()

in binary.go [93:122]

• 24 lines of code
• 9 McCabe index (conditional complexity)

func (d *Decoder) getBinaryLength(tag byte) (int, error) {
	var (
		err error
		buf [2]byte
	)

	if tag >= BC_BINARY_DIRECT && tag <= INT_DIRECT_MAX { // [0x20, 0x2f]
		return int(tag - BC_BINARY_DIRECT), nil
	}

	if tag >= BC_BINARY_SHORT && tag <= byte(0x37) { // [0x34, 0x37]
		_, err = io.ReadFull(d.reader, buf[:1])
		if err != nil {
			return 0, perrors.WithStack(err)
		}

		return int(tag-BC_BINARY_SHORT)<<8 + int(buf[0]), nil
	}

	if tag != BC_BINARY_CHUNK && tag != BC_BINARY {
		return 0, perrors.Errorf("illegal binary tag:%d", tag)
	}

	_, err = io.ReadFull(d.reader, buf[:2])
	if err != nil {
		return 0, perrors.WithStack(err)
	}

	return int(buf[0])<<8 + int(buf[1]), nil
}