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8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
4 | * All rights reserved | |
5260325f | 5 | * Macros for storing and retrieving data in msb first and lsb first order. |
6ae2364d | 6 | * |
bcbf86ec | 7 | * As far as I am concerned, the code I have written for this software |
8 | * can be used freely for any purpose. Any derived versions of this | |
9 | * software must be clearly marked as such, and if the derived work is | |
10 | * incompatible with the protocol description in the RFC file, it must be | |
11 | * called by a name other than "ssh" or "Secure Shell". | |
5260325f | 12 | */ |
8efc0c15 | 13 | |
bcbf86ec | 14 | /* RCSID("$OpenBSD: getput.h,v 1.5 2000/09/07 20:27:51 deraadt Exp $"); */ |
8efc0c15 | 15 | |
16 | #ifndef GETPUT_H | |
17 | #define GETPUT_H | |
18 | ||
19 | /*------------ macros for storing/extracting msb first words -------------*/ | |
20 | ||
21 | #define GET_32BIT(cp) (((unsigned long)(unsigned char)(cp)[0] << 24) | \ | |
6ae2364d | 22 | ((unsigned long)(unsigned char)(cp)[1] << 16) | \ |
8efc0c15 | 23 | ((unsigned long)(unsigned char)(cp)[2] << 8) | \ |
24 | ((unsigned long)(unsigned char)(cp)[3])) | |
25 | ||
26 | #define GET_16BIT(cp) (((unsigned long)(unsigned char)(cp)[0] << 8) | \ | |
27 | ((unsigned long)(unsigned char)(cp)[1])) | |
28 | ||
29 | #define PUT_32BIT(cp, value) do { \ | |
30 | (cp)[0] = (value) >> 24; \ | |
31 | (cp)[1] = (value) >> 16; \ | |
32 | (cp)[2] = (value) >> 8; \ | |
33 | (cp)[3] = (value); } while (0) | |
34 | ||
35 | #define PUT_16BIT(cp, value) do { \ | |
36 | (cp)[0] = (value) >> 8; \ | |
37 | (cp)[1] = (value); } while (0) | |
38 | ||
39 | /*------------ macros for storing/extracting lsb first words -------------*/ | |
40 | ||
41 | #define GET_32BIT_LSB_FIRST(cp) \ | |
42 | (((unsigned long)(unsigned char)(cp)[0]) | \ | |
43 | ((unsigned long)(unsigned char)(cp)[1] << 8) | \ | |
44 | ((unsigned long)(unsigned char)(cp)[2] << 16) | \ | |
45 | ((unsigned long)(unsigned char)(cp)[3] << 24)) | |
46 | ||
47 | #define GET_16BIT_LSB_FIRST(cp) \ | |
48 | (((unsigned long)(unsigned char)(cp)[0]) | \ | |
49 | ((unsigned long)(unsigned char)(cp)[1] << 8)) | |
50 | ||
51 | #define PUT_32BIT_LSB_FIRST(cp, value) do { \ | |
52 | (cp)[0] = (value); \ | |
53 | (cp)[1] = (value) >> 8; \ | |
54 | (cp)[2] = (value) >> 16; \ | |
55 | (cp)[3] = (value) >> 24; } while (0) | |
56 | ||
57 | #define PUT_16BIT_LSB_FIRST(cp, value) do { \ | |
58 | (cp)[0] = (value); \ | |
59 | (cp)[1] = (value) >> 8; } while (0) | |
60 | ||
5260325f | 61 | #endif /* GETPUT_H */ |