me->statepos = me->nstates;
}
-void midend_undo(midend_data *me)
+static int midend_undo(midend_data *me)
{
- if (me->statepos > 1)
+ if (me->statepos > 1) {
me->statepos--;
+ return 1;
+ } else
+ return 0;
}
-void midend_redo(midend_data *me)
+static int midend_redo(midend_data *me)
{
- if (me->statepos < me->nstates)
+ if (me->statepos < me->nstates) {
me->statepos++;
+ return 1;
+ } else
+ return 0;
}
int midend_process_key(midend_data *me, int x, int y, int button)
midend_redraw(me);
return 1; /* never animate */
} else if (button == 'u' || button == 'u' ||
- button == '\x1A' || button == '\x1F') {
- midend_undo(me);
+ button == '\x1A' || button == '\x1F') {
+ if (!midend_undo(me))
+ return 1;
} else if (button == '\x12') {
- midend_redo(me);
+ if (!midend_redo(me))
+ return 1;
} else if (button == 'q' || button == 'Q' || button == '\x11') {
free_game(oldstate);
return 0;