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Annotation of Gnu-Mach/scsi/scsi_endian.h, revision 1.1

1.1     ! root        1: /* 
        !             2:  * Mach Operating System
        !             3:  * Copyright (c) 1991,1990 Carnegie Mellon University
        !             4:  * All Rights Reserved.
        !             5:  * 
        !             6:  * Permission to use, copy, modify and distribute this software and its
        !             7:  * documentation is hereby granted, provided that both the copyright
        !             8:  * notice and this permission notice appear in all copies of the
        !             9:  * software, derivative works or modified versions, and any portions
        !            10:  * thereof, and that both notices appear in supporting documentation.
        !            11:  * 
        !            12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            15:  * 
        !            16:  * Carnegie Mellon requests users of this software to return to
        !            17:  * 
        !            18:  *  Software Distribution Coordinator  or  [email protected]
        !            19:  *  School of Computer Science
        !            20:  *  Carnegie Mellon University
        !            21:  *  Pittsburgh PA 15213-3890
        !            22:  * 
        !            23:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            24:  * the rights to redistribute these changes.
        !            25:  */
        !            26: /*
        !            27:  *     File: scsi_endian.h
        !            28:  *     Author: Alessandro Forin, Carnegie Mellon University
        !            29:  *     Date:   6/91
        !            30:  *
        !            31:  *     Byte/Bit order issues are solved here.
        !            32:  */
        !            33: 
        !            34: 
        !            35: #ifndef        _SCSI_ENDIAN_H_
        !            36: #define        _SCSI_ENDIAN_H_ 1
        !            37: 
        !            38: /*
        !            39:  * Macros to take care of bitfield placement within a byte.
        !            40:  * It might be possible to extend these to something that
        !            41:  * takes care of multibyte structures, using perhaps the
        !            42:  * type ("t") parameter.  Someday.
        !            43:  */
        !            44: #if    BYTE_MSF
        !            45: 
        !            46: #define        BITFIELD_2(t,a,b)               t b,a
        !            47: #define        BITFIELD_3(t,a,b,c)             t c,b,a
        !            48: #define        BITFIELD_4(t,a,b,c,d)           t d,c,b,a
        !            49: #define        BITFIELD_5(t,a,b,c,d,e)         t e,d,c,b,a
        !            50: #define        BITFIELD_6(t,a,b,c,d,e,f)       t f,e,d,c,b,a
        !            51: #define        BITFIELD_7(t,a,b,c,d,e,f,g)     t g,f,e,d,c,b,a
        !            52: #define        BITFIELD_8(t,a,b,c,d,e,f,g,h)   t h,g,f,e,d,c,b,a
        !            53: 
        !            54: #else  /*BYTE_MSF*/
        !            55: 
        !            56: #define        BITFIELD_2(t,a,b)               t a,b
        !            57: #define        BITFIELD_3(t,a,b,c)             t a,b,c
        !            58: #define        BITFIELD_4(t,a,b,c,d)           t a,b,c,d
        !            59: #define        BITFIELD_5(t,a,b,c,d,e)         t a,b,c,d,e
        !            60: #define        BITFIELD_6(t,a,b,c,d,e,f)       t a,b,c,d,e
        !            61: #define        BITFIELD_7(t,a,b,c,d,e,f,g)     t a,b,c,d,e,f,g
        !            62: #define        BITFIELD_8(t,a,b,c,d,e,f,g,h)   t a,b,c,d,e,f,g,h
        !            63: 
        !            64: #endif /*BYTE_MSF*/
        !            65: 
        !            66: #endif /*_SCSI_ENDIAN_H_*/

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