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1/* $Id$ */
2/*
3 * Copyright (c) 1992, 1993, 1994, 1995, 1996
4 *The Regents of the University of California. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that: (1) source code distributions
8 * retain the above copyright notice and this paragraph in its entirety, (2)
9 * distributions including binary code include the above copyright notice and
10 * this paragraph in its entirety in the documentation or other materials
11 * provided with the distribution, and (3) all advertising materials mentioning
12 * features or use of this software display the following acknowledgement:
13 * ``This product includes software developed by the University of California,
14 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
15 * the University nor the names of its contributors may be used to endorse
16 * or promote products derived from this software without specific prior
17 * written permission.
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
19 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21 */
22/* Network to host order macros */
23
24#ifndef EXTRACT_HH
25#define EXTRACT_HH
26
27#ifdef LBL_ALIGN
28#define EXTRACT_16BITS(p) \
29 ((u_int16_t)((u_int16_t)*((const u_int8_t *)(p) + 0) << 8 | \
30 (u_int16_t)*((const u_int8_t *)(p) + 1)))
31#define EXTRACT_32BITS(p) \
32 ((u_int32_t)((u_int32_t)*((const u_int8_t *)(p) + 0) << 24 | \
33 (u_int32_t)*((const u_int8_t *)(p) + 1) << 16 | \
34 (u_int32_t)*((const u_int8_t *)(p) + 2) << 8 | \
35 (u_int32_t)*((const u_int8_t *)(p) + 3)))
36#else
37#define EXTRACT_16BITS(p) \
38 ((u_int16_t)ntohs(*(const u_int16_t *)(p)))
39#define EXTRACT_32BITS(p) \
40 ((u_int32_t)ntohl(*(const u_int32_t *)(p)))
41#endif
42
43#define EXTRACT_24BITS(p) \
44 ((u_int32_t)((u_int32_t)*((const u_int8_t *)(p) + 0) << 16 | \
45 (u_int32_t)*((const u_int8_t *)(p) + 1) << 8 | \
46 (u_int32_t)*((const u_int8_t *)(p) + 2)))
47
48/* Little endian protocol host order macros */
49#define EXTRACT_LE_8BITS(p) (*(p))
50#define EXTRACT_LE_16BITS(p) \
51 ((u_int16_t)((u_int16_t)*((const u_int8_t *)(p) + 1) << 8 | \
52 (u_int16_t)*((const u_int8_t *)(p) + 0)))
53#define EXTRACT_LE_32BITS(p) \
54 ((u_int32_t)((u_int32_t)*((const u_int8_t *)(p) + 3) << 24 | \
55 (u_int32_t)*((const u_int8_t *)(p) + 2) << 16 | \
56 (u_int32_t)*((const u_int8_t *)(p) + 1) << 8 | \
57 (u_int32_t)*((const u_int8_t *)(p) + 0)))
58
59#endif /* EXTRACT_HH */