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1 | /* | |
2 | * | |
3 | * getput.h | |
4 | * | |
5 | * Author: Tatu Ylonen <ylo@cs.hut.fi> | |
6 | * | |
7 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
8 | * All rights reserved | |
9 | * | |
10 | * Created: Wed Jun 28 22:36:30 1995 ylo | |
11 | * | |
12 | * Macros for storing and retrieving data in msb first and lsb first order. | |
13 | * | |
14 | */ | |
15 | ||
16 | /* RCSID("$Id$"); */ | |
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 */ |