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Annotation of Gnu-Mach/scsi/scsi_endian.h, revision 1.1.1.1

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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