11668Smckusick /* Copyright (c) 1979 Regents of the University of California */ 21668Smckusick 3*9136Smckusick static char sccsid[] = "@(#)NIL.c 1.3 11/12/82"; 41668Smckusick 51668Smckusick #include "h00vars.h" 61668Smckusick 7*9136Smckusick char ENIL[] = "Pointer value out of legal range\n"; 8*9136Smckusick 91668Smckusick char * 101668Smckusick NIL(ptr) 111668Smckusick char *ptr; /* pointer to struct */ 121668Smckusick { 131668Smckusick if (ptr > _maxptr || ptr < _minptr) { 14*9136Smckusick ERROR(ENIL, 0); 151668Smckusick return; 161668Smckusick } 171668Smckusick return ptr; 181668Smckusick } 19