offset of structure fields

[Massimiliano Cialdi]

suppose to have

typedef struct {
  struct {
    u16_t ff1;           
    u16_t ff2;        
    u16_t ff3; 
  } f1[3];
  u8_t f2;
  u8_t f3;
  u8_t f4;
  u16_t f5;
} Param_t;

I need to know the offset of the fields. For example f1[0].ff1 is placed
at the offset 0, and f1[2].ff2, or f3?
There is a way to obtain these offsets without have an istance of
Param_t?

thanks

-- 
Massimiliano Cialdi
cialdi@firenze.net
m.cialdi@oksys.it