operator bit-fields

define x86  。。。

# include
# include 

struct date {unsigned  d:5, m:4, y:14;}__attribute((__packed__)); //aligned  24bit

union xxx{
    struct date m_date;
    int  i ;
};
// how to operator bit-fields

int
main(int argc,char * argv[]) {

    printf(" %d " ,sizeof(struct date));

    union xxx x;
    x.i = 0xF88B7;// register just only 24bit
    x; 
    printf(" %d %d %d",x.m_date.d,x.m_date.m,x.m_date.y);

    struct date m_date ;
    int i = 0xF88B7;

    m_date = *(struct date * )(int *)&i;

    printf(" %d %d %d",m_date.d,m_date.m,m_date.y);

    exit(EXIT_SUCCESS);

}