1/*
2 * Buffering to output and input.
3 * Copyright (C) 1998 Kunihiro Ishiguro
4 *
5 * This file is part of GNU Zebra.
6 *
7 * GNU Zebra is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published
9 * by the Free Software Foundation; either version 2, or (at your
10 * option) any later version.
11 *
12 * GNU Zebra is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Zebra; see the file COPYING.  If not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
21 */
22
23#ifndef _ZEBRA_BUFFER_H
24#define _ZEBRA_BUFFER_H
25
26/* Buffer master. */
27struct buffer
28{
29  /* Data list. */
30  struct buffer_data *head;
31  struct buffer_data *tail;
32
33  /* Current allocated data. */
34  unsigned long alloc;
35
36  /* Total length of buffer. */
37  unsigned long size;
38
39  /* For allocation. */
40  struct buffer_data *unused_head;
41  struct buffer_data *unused_tail;
42
43  /* Current total length of this buffer. */
44  unsigned long length;
45};
46
47/* Data container. */
48struct buffer_data
49{
50  struct buffer *parent;
51  struct buffer_data *next;
52  struct buffer_data *prev;
53
54  /* Acctual data stream. */
55  unsigned char *data;
56
57  /* Current pointer. */
58  unsigned long cp;
59
60  /* Start pointer. */
61  unsigned long sp;
62};
63
64/* Buffer prototypes. */
65struct buffer *buffer_new (size_t);
66int buffer_write (struct buffer *, u_char *, size_t);
67void buffer_free (struct buffer *);
68char *buffer_getstr (struct buffer *);
69int buffer_putc (struct buffer *, u_char);
70int buffer_putstr (struct buffer *, u_char *);
71void buffer_reset (struct buffer *);
72int buffer_flush_all (struct buffer *, int);
73int buffer_flush_vty_all (struct buffer *, int, int, int);
74int buffer_flush_window (struct buffer *, int, int, int, int, int);
75int buffer_empty (struct buffer *);
76
77#endif /* _ZEBRA_BUFFER_H */
78