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support full range of dev_t major/minor numbers in makedev, etc. macros

This commit is contained in:
Rich Felker 2013-05-15 16:15:50 -04:00
parent 2897bfdd60
commit 2c184264ea
1 changed files with 10 additions and 3 deletions
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13
include/sys/sysmacros.h
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@ -1,8 +1,15 @@
#ifndef _SYS_SYSMACROS_H
#define _SYS_SYSMACROS_H
#define major(x) ((unsigned)((x) >> 8) & 0xff)
#define minor(x) ((unsigned)(x) & 0xff)
#define makedev(x,y) (((x)<<8)|((y)&0xff))
#define major(x) \
((unsigned)( (((x)>>32) & 0xfffff000) | (((x)>>8) & 0x00000fff) ))
#define minor(x) \
((unsigned)( (((x)>>12) & 0xffffff00) | ((x) & 0x000000ff) ))
#define makedev(x,y) ( \
(((x)&0xfffff000ULL) << 32) | \
(((x)&0x00000fffULL) << 8) | \
(((y)&0xffffff00ULL) << 12) | \
(((y)&0x000000ffULL)) )
#endif