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comparison src/io/io_buf.h @ 0:d39e1d0d75b6

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author paulo@hit-nxdomain.opendns.com
date Sat, 20 Feb 2010 21:18:28 -0800
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1 /*
2 * $Id: io_buf.h,v 1.2 2003/09/17 17:44:11 hipnod Exp $
3 *
4 * Copyright (C) 2003 giFT project (gift.sourceforge.net)
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
9 * later version.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 */
16
17 #ifndef GIFT_GT_IO_BUF_H_
18 #define GIFT_GT_IO_BUF_H_
19
20 /*****************************************************************************/
21
22 /*
23 * This duplicates libgift's String somewhat...
24 */
25 struct io_buf
26 {
27 uint8_t *data;
28 size_t size;
29 size_t r_offs;
30 size_t w_offs;
31 };
32
33 /*****************************************************************************/
34
35 /*
36 * Macros for accessing particular things about an I/O buf...
37 */
38
39 #define io_buf_read_avail(io_buf) \
40 ((io_buf)->w_offs - (io_buf)->r_offs)
41
42 #define io_buf_len(io_buf) \
43 ((io_buf)->w_offs)
44
45 #define io_buf_size(io_buf) \
46 ((io_buf)->size)
47
48 #define io_buf_write_avail(io_buf) \
49 ((io_buf)->size - (io_buf)->w_offs)
50
51 #define io_buf_write_ptr(io_buf) \
52 (&(io_buf)->data[(io_buf)->w_offs])
53
54 #define io_buf_read_ptr(iobuf) \
55 (&(iobuf)->data[(iobuf)->r_offs])
56
57 /*****************************************************************************/
58
59 struct io_buf *io_buf_new (size_t len);
60 void io_buf_free (struct io_buf *buf);
61 uint8_t *io_buf_free_keep (struct io_buf *buf);
62
63 BOOL io_buf_resize (struct io_buf *buf, size_t len);
64 void io_buf_reset (struct io_buf *buf);
65
66 void io_buf_push (struct io_buf *buf, size_t len);
67 void io_buf_pop (struct io_buf *buf, size_t len);
68
69 size_t io_buf_copy (struct io_buf *dst, struct io_buf *src,
70 size_t len);
71
72 /*****************************************************************************/
73
74 #endif /* GIFT_GT_IO_BUF_H_ */