struct st {
        int value;
        struct st *other;
};

static void
execute_a (struct st *st, int i)
{
}

static void
execute_b (struct st *st)
{
}

static void
parser_check (struct st *st, int i)
{
        if (st && st->other && st->value > i && i > 0){
                execute_a (st, i);
        } else {
                execute_b (st);
        }
}