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Annotation of src/usr.bin/ssh/getput.h, Revision 1.6

1.1       deraadt     1: /*
1.2       deraadt     2:  * Author: Tatu Ylonen <ylo@cs.hut.fi>
                      3:  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
                      4:  *                    All rights reserved
                      5:  * Macros for storing and retrieving data in msb first and lsb first order.
1.3       markus      6:  *
1.5       deraadt     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".
1.2       deraadt    12:  */
1.1       deraadt    13:
1.6     ! markus     14: /* RCSID("$OpenBSD: getput.h,v 1.5 2000/09/07 20:27:51 deraadt Exp $"); */
1.1       deraadt    15:
                     16: #ifndef GETPUT_H
                     17: #define GETPUT_H
                     18:
                     19: /*------------ macros for storing/extracting msb first words -------------*/
                     20:
1.6     ! markus     21: #define GET_32BIT(cp) (((u_long)(u_char)(cp)[0] << 24) | \
        !            22:                       ((u_long)(u_char)(cp)[1] << 16) | \
        !            23:                       ((u_long)(u_char)(cp)[2] << 8) | \
        !            24:                       ((u_long)(u_char)(cp)[3]))
1.1       deraadt    25:
1.6     ! markus     26: #define GET_16BIT(cp) (((u_long)(u_char)(cp)[0] << 8) | \
        !            27:                       ((u_long)(u_char)(cp)[1]))
1.1       deraadt    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) \
1.6     ! markus     42:   (((u_long)(u_char)(cp)[0]) | \
        !            43:   ((u_long)(u_char)(cp)[1] << 8) | \
        !            44:   ((u_long)(u_char)(cp)[2] << 16) | \
        !            45:   ((u_long)(u_char)(cp)[3] << 24))
1.1       deraadt    46:
                     47: #define GET_16BIT_LSB_FIRST(cp) \
1.6     ! markus     48:   (((u_long)(u_char)(cp)[0]) | \
        !            49:   ((u_long)(u_char)(cp)[1] << 8))
1.1       deraadt    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:
1.2       deraadt    61: #endif                         /* GETPUT_H */