if (i_womp != NULL) { munmap(i_womp, i_size); i_womp = NULL; }
re_input(void){	if (using_plan_a) {		i_size = 0;		free(i_ptr);		free(i_womp);		i_womp = NULL;		i_ptr = NULL;	} else {		using_plan_a = true;	/* maybe the next one is smaller */		close(tifd);		tifd = -1;		free(tibuf[0]);		free(tibuf[1]);		tibuf[0] = tibuf[1] = NULL;		tiline[0] = tiline[1] = -1;		tireclen = 0;	}}