33 static void link_line_buf(LINE_BUF * m, LINE_BUF * s)  in link_line_buf()  argument
37         s->next = m->next;  in link_line_buf()
38         (s->next)->prev = s;  in link_line_buf()
41         s->next = NULL;  in link_line_buf()
43     m->next = s;  in link_line_buf()
44     s->prev = m;  in link_line_buf()
47 static void unlink_line_buf(LINE_BUF * s)  in unlink_line_buf()  argument
49     if ((s->prev != NULL) && (s->next != NULL))  in unlink_line_buf()
51         (s->prev)->next = s->next;  in unlink_line_buf()
52         (s->next)->prev = s->prev;  in unlink_line_buf()
53         s->next = NULL;  in unlink_line_buf()
54         s->prev = NULL;  in unlink_line_buf()
56     else if (s->next != NULL)  in unlink_line_buf()
58         s->prev = NULL;  in unlink_line_buf()
59         (s->next)->prev = NULL;  in unlink_line_buf()
60         s->next = NULL;  in unlink_line_buf()
62     else if (s->prev != NULL)  in unlink_line_buf()
64         s->next = NULL;  in unlink_line_buf()
65         (s->prev)->next = NULL;  in unlink_line_buf()
66         s->prev = NULL;  in unlink_line_buf()