Decoding data from a byte slice to Uint32

Question

package main

import (
        "bytes"
        "encoding/binary"
        "fmt"
)

func main() {
        aa := uint(0xFFFFFFFF)
        fmt.Println(aa)
        byteNewbuf := []byte{0xFF, 0xFF, 0xFF, 0xFF}
        buf := bytes.NewBuffer(byteNewbuf)
        tt, _ := binary.ReadUvarint(buf)
        fmt.Println(tt)
}

Need to convert 4 bytes array to uint32 but why the results are not same ? go verion : beta 1.1

Answer 1

You can do this with one of the ByteOrder objects from the encoding/binary package. For instance:

package main

import (
        "encoding/binary"
        "fmt"
)

func main() {
        aa := uint(0x7FFFFFFF)
        fmt.Println(aa)
        slice := []byte{0xFF, 0xFF, 0xFF, 0x7F}
        tt := binary.LittleEndian.Uint32(slice)
        fmt.Println(tt)
}

If your data is in big endian format, you can instead use the same methods on binary.BigEndian.