英文:
byte endian convert by using encoding/binary in Go
问题
我收到了运行时错误消息Write T1 binary.Read: invalid type main.T1
package mainimport ("encoding/binary""net")type T1 struct {f1 [5]bytef2 int}func main() {conn, _ := net.Dial("tcp", ":12345")l1 := T1{[5]byte{'a', 'b', 'c', 'd', 'e'}, 1234}binary.Write(conn, binary.BigEndian, &l1)}
我希望使用自动转换字节序的功能，我该如何做呢？
顺便问一下，有没有更高效的方法？
英文:
I got the runtime error message Write T1 binary.Read: invalid type main.T1
package mainimport ("encoding/binary""net")type T1 struct {f1 [5]bytef2 int}func main() {conn, _ := net.Dial("tcp", ":12345")l1 := T1{[5]byte{'a', 'b', 'c', 'd', 'e'}, 1234}binary.Write(conn, binary.BigEndian, &l1)}
I wish to use the endian auto convert function, how could I do?
By the way, is there more efficient way?
答案1
得分: 9
使用导出的固定大小字段。例如，
package mainimport ("bytes""encoding/binary""fmt")type T struct {F1 [5]byteF2 int32}func main() {var t1, t2 Tt1 = T{[5]byte{'a', 'b', 'c', 'd', 'e'}, 1234}fmt.Println("t1:", t1)buf := new(bytes.Buffer)err := binary.Write(buf, binary.BigEndian, &t1)if err != nil {fmt.Println(err)}err = binary.Read(buf, binary.BigEndian, &t2)if err != nil {fmt.Println(err)}fmt.Println("t2:", t2)}
输出：
t1: {[97 98 99 100 101] 1234}t2: {[97 98 99 100 101] 1234}
英文:
Use exported fixed size fields. For example,
package mainimport ("bytes""encoding/binary""fmt")type T struct {F1 [5]byteF2 int32}func main() {var t1, t2 Tt1 = T{[5]byte{'a', 'b', 'c', 'd', 'e'}, 1234}fmt.Println("t1:", t1)buf := new(bytes.Buffer)err := binary.Write(buf, binary.BigEndian, &t1)if err != nil {fmt.Println(err)}err = binary.Read(buf, binary.BigEndian, &t2)if err != nil {fmt.Println(err)}fmt.Println("t2:", t2)}
Output:
t1: {[97 98 99 100 101] 1234}t2: {[97 98 99 100 101] 1234}
答案2
得分: 2
引用来自binary/encoding文档的_exactomundo_的话：
> 固定大小的值可以是固定大小的算术类型（int8，uint8，int16，float32，complex64，...）或仅包含固定大小值的数组或结构体。
因此：
type T1 struct {f1 [5]uint8f2 int32}
在这里起作用。
英文:
Quoting exactomundo from binary/encoding docs:
> A fixed-size value is either a fixed-size arithmetic type (int8, uint8, int16, float32, complex64, ...) or an array or struct containing only fixed-size values.
And therefore:
type T1 struct {f1 [5]uint8f2 int32}
works here.
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