do_stack          113 lib/ubasic/ubasic.c static short do_stack[MAX_DO_STACK_DEPTH];
do_stack         1502 lib/ubasic/ubasic.c      do_stack[do_stack_ptr] = tokenizer_line_number();
do_stack         1520 lib/ubasic/ubasic.c       jump_line(do_stack[do_stack_ptr-1]);