package util

func BytesToUint64(b []byte)(v uint64){
  length := uint(len(b))
  for i :=uint(0);i<length-1;i++ {
    v += uint64(b[i])
    v <<= 8
  }
  v+=uint64(b[length-1])
  return
}
func BytesToUint32(b []byte)(v uint32){
  length := uint(len(b))
  for i :=uint(0);i<length-1;i++ {
    v += uint32(b[i])
    v <<= 8
  }
  v+=uint32(b[length-1])
  return
}
func Uint64toBytes(b []byte, v uint64){
  for i :=uint(0);i<8;i++ {
    b[7-i] = byte(v>>(i*8))
  }
}
func Uint32toBytes(b []byte, v uint32){
  for i :=uint(0);i<4;i++ {
    b[3-i] = byte(v>>(i*8))
  }
}
func Uint8toBytes(b []byte, v uint8){
  b[0] = byte(v)
}