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      1 /*	$OpenBSD: getput.h,v 1.8 2002/03/04 17:27:39 stevesk Exp $	*/
      2 
      3 #ifndef	_GETPUT_H
      4 #define	_GETPUT_H
      5 
      6 #pragma ident	"%Z%%M%	%I%	%E% SMI"
      7 
      8 #ifdef __cplusplus
      9 extern "C" {
     10 #endif
     11 
     12 
     13 /*
     14  * Author: Tatu Ylonen <ylo (at) cs.hut.fi>
     15  * Copyright (c) 1995 Tatu Ylonen <ylo (at) cs.hut.fi>, Espoo, Finland
     16  *                    All rights reserved
     17  * Macros for storing and retrieving data in msb first and lsb first order.
     18  *
     19  * As far as I am concerned, the code I have written for this software
     20  * can be used freely for any purpose.  Any derived versions of this
     21  * software must be clearly marked as such, and if the derived work is
     22  * incompatible with the protocol description in the RFC file, it must be
     23  * called by a name other than "ssh" or "Secure Shell".
     24  */
     25 
     26 /*------------ macros for storing/extracting msb first words -------------*/
     27 
     28 #define GET_64BIT(cp) (((u_int64_t)(u_char)(cp)[0] << 56) | \
     29 		       ((u_int64_t)(u_char)(cp)[1] << 48) | \
     30 		       ((u_int64_t)(u_char)(cp)[2] << 40) | \
     31 		       ((u_int64_t)(u_char)(cp)[3] << 32) | \
     32 		       ((u_int64_t)(u_char)(cp)[4] << 24) | \
     33 		       ((u_int64_t)(u_char)(cp)[5] << 16) | \
     34 		       ((u_int64_t)(u_char)(cp)[6] << 8) | \
     35 		       ((u_int64_t)(u_char)(cp)[7]))
     36 
     37 #define GET_32BIT(cp) (((u_long)(u_char)(cp)[0] << 24) | \
     38 		       ((u_long)(u_char)(cp)[1] << 16) | \
     39 		       ((u_long)(u_char)(cp)[2] << 8) | \
     40 		       ((u_long)(u_char)(cp)[3]))
     41 
     42 #define GET_16BIT(cp) (((u_long)(u_char)(cp)[0] << 8) | \
     43 		       ((u_long)(u_char)(cp)[1]))
     44 
     45 #define PUT_64BIT(cp, value) do { \
     46   (cp)[0] = (value) >> 56; \
     47   (cp)[1] = (value) >> 48; \
     48   (cp)[2] = (value) >> 40; \
     49   (cp)[3] = (value) >> 32; \
     50   (cp)[4] = (value) >> 24; \
     51   (cp)[5] = (value) >> 16; \
     52   (cp)[6] = (value) >> 8; \
     53   (cp)[7] = (value); } while (0)
     54 
     55 #define PUT_32BIT(cp, value) do { \
     56   (cp)[0] = (value) >> 24; \
     57   (cp)[1] = (value) >> 16; \
     58   (cp)[2] = (value) >> 8; \
     59   (cp)[3] = (value); } while (0)
     60 
     61 #define PUT_16BIT(cp, value) do { \
     62   (cp)[0] = (value) >> 8; \
     63   (cp)[1] = (value); } while (0)
     64 
     65 #ifdef __cplusplus
     66 }
     67 #endif
     68 
     69 #endif /* _GETPUT_H */
     70