446 	char	*rptr, *bp;  in xalloc()  local
448 	if ((rptr = malloc(size)) == NULL)  in xalloc()
450 	bp = rptr + size;  in xalloc()
453 	return (rptr);  in xalloc()
459 	char	*rptr = ptr, *bp;  in xrealloc()  local
463 	if (rptr < end) {  in xrealloc()
468 		rptr = xalloc(size);  in xrealloc()
470 		(void) memcpy(rptr, ptr, size);  in xrealloc()
471 		return (rptr);  in xrealloc()
473 	if (rptr < xalloc_bottom) {  in xrealloc()
480 		if ((rptr = realloc(ptr, size)) == NULL)  in xrealloc()
482 		bp = rptr + size;  in xrealloc()
485 		return (rptr);  in xrealloc()
488 	if (rptr > (char *)&rptr) {  in xrealloc()
498 	if (rptr <= xalloc_bottom)  in xrealloc()
508 	char	*rptr = ptr;  in xfree()  local
510 	if (rptr < end) {  in xfree()
513 	if (rptr < xalloc_bottom) {  in xfree()
518 	if (rptr > (char *)&rptr) {  in xfree()
524 	if (rptr <= xalloc_bottom) {  in xfree()