blob: 7b5d742528bfbe9dd349c8a191a94d6e2af52494 [file] [log] [blame]
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001/*
2
3getput.h
4
5Author: Tatu Ylonen <ylo@cs.hut.fi>
6
7Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
8 All rights reserved
9
10Created: Wed Jun 28 22:36:30 1995 ylo
11
12Macros for storing and retrieving data in msb first and lsb first order.
13
14*/
15
16/* RCSID("$Id: getput.h,v 1.1 1999/10/27 03:42:44 damien Exp $"); */
17
18#ifndef GETPUT_H
19#define GETPUT_H
20
21/*------------ macros for storing/extracting msb first words -------------*/
22
23#define GET_32BIT(cp) (((unsigned long)(unsigned char)(cp)[0] << 24) | \
24 ((unsigned long)(unsigned char)(cp)[1] << 16) | \
25 ((unsigned long)(unsigned char)(cp)[2] << 8) | \
26 ((unsigned long)(unsigned char)(cp)[3]))
27
28#define GET_16BIT(cp) (((unsigned long)(unsigned char)(cp)[0] << 8) | \
29 ((unsigned long)(unsigned char)(cp)[1]))
30
31#define PUT_32BIT(cp, value) do { \
32 (cp)[0] = (value) >> 24; \
33 (cp)[1] = (value) >> 16; \
34 (cp)[2] = (value) >> 8; \
35 (cp)[3] = (value); } while (0)
36
37#define PUT_16BIT(cp, value) do { \
38 (cp)[0] = (value) >> 8; \
39 (cp)[1] = (value); } while (0)
40
41/*------------ macros for storing/extracting lsb first words -------------*/
42
43#define GET_32BIT_LSB_FIRST(cp) \
44 (((unsigned long)(unsigned char)(cp)[0]) | \
45 ((unsigned long)(unsigned char)(cp)[1] << 8) | \
46 ((unsigned long)(unsigned char)(cp)[2] << 16) | \
47 ((unsigned long)(unsigned char)(cp)[3] << 24))
48
49#define GET_16BIT_LSB_FIRST(cp) \
50 (((unsigned long)(unsigned char)(cp)[0]) | \
51 ((unsigned long)(unsigned char)(cp)[1] << 8))
52
53#define PUT_32BIT_LSB_FIRST(cp, value) do { \
54 (cp)[0] = (value); \
55 (cp)[1] = (value) >> 8; \
56 (cp)[2] = (value) >> 16; \
57 (cp)[3] = (value) >> 24; } while (0)
58
59#define PUT_16BIT_LSB_FIRST(cp, value) do { \
60 (cp)[0] = (value); \
61 (cp)[1] = (value) >> 8; } while (0)
62
63#endif /* GETPUT_H */
64