Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 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: 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 | |