64位网络字节序与主机字节序转换

unsigned long long ntohll(unsigned long long val)
  {
     if (__BYTE_ORDER == __LITTLE_ENDIAN)
      {
         return (((unsigned long long )htonl((int)((val << 32) >> 32))) << 32) | (unsigned int)htonl((int)(val >> 32));
     }
     else if (__BYTE_ORDER == __BIG_ENDIAN)
      {
         return val;
     }
 }
 
 unsigned long long htonll(unsigned long long val)
  {
     if (__BYTE_ORDER == __LITTLE_ENDIAN)
      {
         return (((unsigned long long )htonl((int)((val << 32) >> 32))) << 32) | (unsigned int)htonl((int)(val >> 32));
     }
     else if (__BYTE_ORDER == __BIG_ENDIAN)
      {
         return val;  www.2cto.com
     }
 }