32     if (m->next != NULL)  in link_line_buf()
34         s->next = m->next;  in link_line_buf()
35         (s->next)->prev = s;  in link_line_buf()
38         s->next = NULL;  in link_line_buf()
40     m->next = s;  in link_line_buf()
46     if ((s->prev != NULL) && (s->next != NULL))  in unlink_line_buf()
48         (s->prev)->next = s->next;  in unlink_line_buf()
49         (s->next)->prev = s->prev;  in unlink_line_buf()
50         s->next = NULL;  in unlink_line_buf()
53     else if (s->next != NULL)  in unlink_line_buf()
56         (s->next)->prev = NULL;  in unlink_line_buf()
57         s->next = NULL;  in unlink_line_buf()
61         s->next = NULL;  in unlink_line_buf()
62         (s->prev)->next = NULL;  in unlink_line_buf()
71     lb_free_ptr = lb_free_ptr->next;  in alloc_line_buf()
84     lb->next = lb_free_ptr;  in free_line_buf()
86     (lb->next)->prev = lb;  in free_line_buf()
103     lb_heap[i].next = NULL;  in init_lb_heap()
179         if (tb->cur->next == NULL)  in m_putchar()
205             tb->cur = tb->cur->next;  in m_putchar()
329         lb = lb->next;  in text_buf_to_vram()