Golang endian byte order

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Golang byte order

Briefly

The recent discovery of the byte order in TCP communication is not well understood and therefore recorded.

The so-called byte order is the character sequence. There are 2 types of sorting methods commonly used in viewing data:

• Big-endian

  The high bit byte is placed at the low address end of the memory, and the low byte is placed on the upper address side of the memory.

• Little-endian

  The lower byte is placed in the low address segment of the memory, and the high byte is placed on the upper address side of the memory.

For example

The decimal number is represented by a binary notation 255 1111 1111 , and the decimal number is represented by a binary notation. 256 1 0000 0000 So the position of this 1 is before or after, that is the difference between Big-endian and Ittle-endian.

In Golang

The functionality of binary encoding/binary serialization is provided in Golang.

Provide read read and write encoding methods

func Read(r io.Reader, order ByteOrder, data interface{}) errorfunc Write(w io.Writer, order ByteOrder, data interface{}) error

and a sort interface

type ByteOrder interface {Uint16([]byte) uint16Uint32([]byte) uint32Uint64([]byte) uint64PutUint16([]byte, uint16)PutUint32([]byte, uint32)PutUint64([]byte, uint64)String() string}type littleEndian struct{}type bigEndian struct{}

Bigendian and Littleendian implement the interface method.

For example

The following results are obtained by using Write encoding:

ioTest := bytes.NewBuffer(make([]byte,0,1024))binary.Write(ioTest,binary.LittleEndian,uint32(10))fmt.Println(ioTest.Next(4))  // [10 0 0 0]binary.Write(ioTest,binary.BigEndian,uint32(10))fmt.Println(ioTest.Next(4)  // [0 0 0 10]

Use read to read the data in the encoding:

  iotest: = bytes. Newbuffer (Make ([]byte,0,1024)) binary. Write (iotest,binary. Bigendian,uint32 (Ten)) Iolen: =uint32 (0) binary. Read (iotest,binary. Bigendian,&iolen) fmt. PRINTLN (Iolen)//10ioLen: =uint32 (0) binary. Read (iotest,binary. Littleendian,&iolen) fmt. PRINTLN (Iolen)//167772160 because the sequence is different, the value is derived in small order.