//isSymbol表示有無符號
func BytesToInt(b []byte, isSymbol bool) (int, error){
if isSymbol {
return bytesToIntS(b)
}
return bytesToIntU(b)
}
//字節數(大端)組轉成int(無符號的)
func bytesToIntU(b []byte) (int, error) {
if len(b) == 3 {
b = append([]byte{0},b...)
}
bytesBuffer := bytes.NewBuffer(b)
switch len(b) {
case 1:
var tmp uint8
err := binary.Read(bytesBuffer, binary.BigEndian, tmp)
return int(tmp), err
case 2:
var tmp uint16
err := binary.Read(bytesBuffer, binary.BigEndian, tmp)
return int(tmp), err
case 4:
var tmp uint32
err := binary.Read(bytesBuffer, binary.BigEndian, tmp)
return int(tmp), err
default:
return 0,fmt.Errorf("%s", "BytesToInt bytes lenth is invaild!")
}
}
//字節數(大端)組轉成int(有符號)
func bytesToIntS(b []byte) (int, error) {
if len(b) == 3 {
b = append([]byte{0},b...)
}
bytesBuffer := bytes.NewBuffer(b)
switch len(b) {
case 1:
var tmp int8
err := binary.Read(bytesBuffer, binary.BigEndian, tmp)
return int(tmp), err
case 2:
var tmp int16
err := binary.Read(bytesBuffer, binary.BigEndian, tmp)
return int(tmp), err
case 4:
var tmp int32
err := binary.Read(bytesBuffer, binary.BigEndian, tmp)
return int(tmp), err
default:
return 0,fmt.Errorf("%s", "BytesToInt bytes lenth is invaild!")
}
}
//整形轉換成字節
func IntToBytes(n int,b byte) ([]byte,error) {
switch b {
case 1:
tmp := int8(n)
bytesBuffer := bytes.NewBuffer([]byte{})
binary.Write(bytesBuffer, binary.BigEndian, tmp)
return bytesBuffer.Bytes(),nil
case 2:
tmp := int16(n)
bytesBuffer := bytes.NewBuffer([]byte{})
binary.Write(bytesBuffer, binary.BigEndian, tmp)
return bytesBuffer.Bytes(),nil
case 3,4:
tmp := int32(n)
bytesBuffer := bytes.NewBuffer([]byte{})
binary.Write(bytesBuffer, binary.BigEndian, tmp)
return bytesBuffer.Bytes(),nil
}
return nil,fmt.Errorf("IntToBytes b param is invaild")
}
func IntToBytes(n int)[]byte{
data:=int64(n)//數據類型轉換
bytebuffer:=bytes.NewBuffer([]byte{})//字節集合
binary.Write(bytebuffer,binary.BigEndian,data)//按照二進制寫入字節
return bytebuffer.Bytes()//返回字節結合
}
func BytesToInt(bs []byte)int{
bytebuffer:=bytes.NewBuffer(bs) //根據二進制寫入二進制結合
var data int64
binary.Read(bytebuffer,binary.BigEndian,data) //解碼
return int(data)
}
