crypto/openssh-4/getput.h

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