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/* @(#)device.h 1.2 98/07/20 Copyright 1995 J. Schilling */
/*
* Generic header for users of major(), minor() and makedev()
*
* Copyright (c) 1995 J. Schilling
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _DEVICE_H
#define _DEVICE_H
/*
* On generic SVR4, major is a function (defined in sys/mkdev.h).
* On Solaris it is defined ...
* As we cannot just test if major is #define'd, we have to
* define _FOUND_MAJOR_ instead.
*
* WARNING: Do never include <sys/sysmacros.h> in SVR4, it contains
* an old definition for major()/minor() defining 8 minorbits.
* Use <sys/mkdev.h> instead.
*/
#include <sys/types.h>
/*
* Some systems define major in <sys/types.h>.
* We are ready...
*/
#ifdef major
# define _FOUND_MAJOR_
#endif
#ifdef MAJOR_IN_MKDEV
# include <sys/mkdev.h>
# define _FOUND_MAJOR_
#endif
#ifndef _FOUND_MAJOR_
# ifdef MAJOR_IN_SYSMACROS
# include <sys/sysmacros.h>
# define _FOUND_MAJOR_
# endif
#endif
/*
* If we are on HP/UX before HP/UX 8,
* major/minor are not in <sys/sysmacros.h>.
*/
#ifndef _FOUND_MAJOR_
# if defined(hpux) || defined(__hpux__) || defined(__hpux)
# include <sys/mknod.h>
# define _FOUND_MAJOR_
# endif
#endif
/*
* For all other systems define major()/minor() here.
* XXX Check if this definition will be usefull for ms dos too.
*/
#ifndef _FOUND_MAJOR_
# define major(dev) (((dev) >> 8) & 0xFF)
# define minor(dev) ((dev) & 0xFF)
# define makedev(majo, mino) (((majo) << 8) | (mino))
#endif
#define XDEV_T unsigned long
extern int minorbits;
extern XDEV_T minormask;
extern XDEV_T _dev_mask[];
#define dev_major(dev) (((XDEV_T)(dev)) >> minorbits)
#define _dev_major(mbits,dev) (((XDEV_T)(dev)) >> (mbits))
#define dev_minor(dev) (((XDEV_T)(dev)) & minormask)
#define _dev_minor(mbits,dev) (((XDEV_T)(dev)) & _dev_mask[(mbits)])
#define dev_make(majo, mino) ((((XDEV_T)(majo)) << minorbits) | \
((XDEV_T)(mino)))
#define _dev_make(mbits,majo,mino) ((((XDEV_T)(majo)) << (mbits) | \
((XDEV_T)(mino)))
extern void dev_init __PR((BOOL debug));
#ifndef dev_major
extern XDEV_T dev_major __PR((XDEV_T dev));
extern XDEV_T _dev_major __PR((int mbits, XDEV_T dev));
extern XDEV_T dev_minor __PR((XDEV_T dev));
extern XDEV_T _dev_minor __PR((int mbits, XDEV_T dev));
extern XDEV_T dev_make __PR((XDEV_T majo, XDEV_T mino));
extern XDEV_T _dev_make __PR((int mbits, XDEV_T majo, XDEV_T mino));
#endif
/*
* Don't pollute namespace...
*/
#undef _FOUND_MAJOR_
#endif /* _DEVICE_H */
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