/* Finding offsets of elements within structures.
 * Taken from the X code... they've sweated portability of this stuff
 * so we don't have to.  Sigh...
 */
  
#if defined(CRAY) || (defined(__arm) && !defined(LINUX))
#ifdef __STDC__
#define XtOffset(p_type,field) _Offsetof(p_type,field)
#else
#ifdef CRAY2
#define XtOffset(p_type,field) \
 	(sizeof(int)*((unsigned int)&(((p_type)NULL)->field)))
 
#else /* !CRAY2 */
 
#define XtOffset(p_type,field) ((unsigned int)&(((p_type)NULL)->field))
 
#endif /* !CRAY2 */
#endif /* __STDC__ */
#else /* ! (CRAY || __arm) */
 
#define XtOffset(p_type,field) \
 	((long) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
 
#endif /* !CRAY */
 
#ifndef XtOffsetOf
#ifdef offsetof
#define XtOffsetOf(s_type,field) offsetof(s_type,field)
#else
#define XtOffsetOf(s_type,field) XtOffset(s_type*,field)
#endif
#endif