text: /* utility definitions */
  
  #ifdef _POSIX2_RE_DUP_MAX
  #define	DUPMAX	_POSIX2_RE_DUP_MAX
  #else
  #define	DUPMAX	255
  #endif
  #define	INFINITY	(DUPMAX + 1)
  #define	NC		(CHAR_MAX - CHAR_MIN + 1)
  typedef unsigned char uch;
  
  /* switch off assertions (if not already off) if no REDEBUG */
  #ifndef REDEBUG
  #ifndef NDEBUG
  #define	NDEBUG	/* no assertions please */
  #endif
  #endif
  #include <assert.h>
  
  /* for old systems with bcopy() but no memmove() */
  #ifdef USEBCOPY
  #define	memmove(d, s, c)	bcopy(s, d, c)
  #endif
  