golang获取补码，原码

package main

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

func main() {
    var a = []byte{0x15, 0x4B}
    var b = []byte{0xE0, 0x15}
    // fmt.Println(fmt.Sprintf("%.16b", 0x154B))
    fmt.Println(GetYuanMa(a), GetYuanMa(b))

}
// 当data为原码时，输出补码
func GetBuMa(data []byte) uint16 {
    var ym uint16
    bm := binary.BigEndian.Uint16(data)
    var bitNum = len(data) * 8
    f := "%." + strconv.Itoa(bitNum) + "b"
    bmStr := fmt.Sprintf(f, bm)
    if string(bmStr[0]) == "1" {
        ym = ^bm + 1
    } else {
        ym = bm
    }
    return ym
}

// 当data为补码时，输出原码。
// 原理: 补码的补码为原码
func GetYuanMa(data []byte) uint16 {
    return GetBuMa(data)
}