Code vereinfachen?

[Fred vom Jupiter]

Hallo Leute!
Ich habe mir ein paar Makros gebastelt, mit denen ich komfortabel auf Strukturen in einem Flash-Speicher zugreifen kann.
Hier mal etwas Code:

#include <stdio.h>
#include <string.h>

#define FIELD_OFFSET(type, fld)   ((long) &(((type *)0)->fld))
#define FIELD_SIZE(type, fld)     (sizeof (((type *)0)->fld))
#define DF_CONFIG_OFFSET 0

//////////////////////////// Simulation ///////////////////////
typedef struct __inner
{
  char ia;
  char istr[14];
  int lalilu;
} INNER;

typedef struct __test
{
  int x;
  struct __inner instruct;
  char str[13];
  int y;
} CONFIGRECORD;

void DF_Read (unsigned long addr, void *dest, int size)
{
  printf ("DF_Read:\n\tfrom flash address:%d\n\tto memory at:%x\n\tsize:%d\n\n", addr, dest, size);
}

/////////////////////////////////////////////////////////////

// Reads one entry from config page into 'dest'
#define CFG_READENTRY(entry,dest) \
  DF_Read(DF_CONFIG_OFFSET+FIELD_OFFSET(CONFIGRECORD,entry),dest,FIELD_SIZE(CONFIGRECORD,entry))

// Reads one subentry of entry from config page into 'dest'
#define CFG_READ_SUB_ENTRY(entry,sub,dest) \
  DF_Read(DF_CONFIG_OFFSET+FIELD_OFFSET(CONFIGRECORD,entry.sub),dest,FIELD_SIZE(CONFIGRECORD,entry.sub))

Ist es möglich, daß CFG_READ_SUB_ENTRY-Makro so zu schreiben, daß man den Namen der äußeren Struktur nicht mit angeben muß?
Danke!!!