func valuesToBytes()

in client/session.go [1002:1085]
83 lines of code
21 McCabe index (conditional complexity)

func valuesToBytes(dataTypes []TSDataType, values []interface{}) ([]byte, error) {
	buff := &bytes.Buffer{}
	for i, t := range dataTypes {
		binary.Write(buff, binary.BigEndian, byte(t))
		v := values[i]
		if v == nil {
			return nil, fmt.Errorf("values[%d] can't be nil", i)
		}

		switch t {
		case BOOLEAN:
			switch v.(type) {
			case bool:
				binary.Write(buff, binary.BigEndian, v)
			default:
				return nil, fmt.Errorf("values[%d] %v(%v) must be bool", i, v, reflect.TypeOf(v))
			}
		case INT32:
			switch v.(type) {
			case int32:
				binary.Write(buff, binary.BigEndian, v)
			default:
				return nil, fmt.Errorf("values[%d] %v(%v) must be int32", i, v, reflect.TypeOf(v))
			}
		case INT64, TIMESTAMP:
			switch v.(type) {
			case int64:
				binary.Write(buff, binary.BigEndian, v)
			default:
				return nil, fmt.Errorf("values[%d] %v(%v) must be int64", i, v, reflect.TypeOf(v))
			}
		case FLOAT:
			switch v.(type) {
			case float32:
				binary.Write(buff, binary.BigEndian, v)
			default:
				return nil, fmt.Errorf("values[%d] %v(%v) must be float32", i, v, reflect.TypeOf(v))
			}
		case DOUBLE:
			switch v.(type) {
			case float64:
				binary.Write(buff, binary.BigEndian, v)
			default:
				return nil, fmt.Errorf("values[%d] %v(%v) must be float64", i, v, reflect.TypeOf(v))
			}
		case TEXT, STRING:
			switch s := v.(type) {
			case string:
				size := len(s)
				binary.Write(buff, binary.BigEndian, int32(size))
				binary.Write(buff, binary.BigEndian, []byte(s))
			case []byte:
				size := len(s)
				binary.Write(buff, binary.BigEndian, int32(size))
				binary.Write(buff, binary.BigEndian, s)
			default:
				return nil, fmt.Errorf("values[%d] %v(%v) must be string or []byte", i, v, reflect.TypeOf(v))
			}
		case BLOB:
			switch s := v.(type) {
			case []byte:
				size := len(s)
				binary.Write(buff, binary.BigEndian, int32(size))
				binary.Write(buff, binary.BigEndian, s)
			default:
				return nil, fmt.Errorf("values[%d] %v(%v) must be []byte", i, v, reflect.TypeOf(v))
			}
		case DATE:
			switch s := v.(type) {
			case time.Time:
				date, err := DateToInt32(s)
				if err != nil {
					return nil, err
				}
				binary.Write(buff, binary.BigEndian, date)
			default:
				return nil, fmt.Errorf("values[%d] %v(%v) must be time.Time", i, v, reflect.TypeOf(v))
			}
		default:
			return nil, fmt.Errorf("types[%d] is incorrect, it must in (BOOLEAN, INT32, INT64, FLOAT, DOUBLE, TEXT, TIMESTAMP, BLOB, DATE, STRING)", i)
		}
	}
	return buff.Bytes(), nil
}