sysmacros.h raw

   1  #ifndef _SYS_SYSMACROS_H
   2  #define _SYS_SYSMACROS_H
   3  
   4  #define major(x) \
   5  	((unsigned)( (((x)>>31>>1) & 0xfffff000) | (((x)>>8) & 0x00000fff) ))
   6  #define minor(x) \
   7  	((unsigned)( (((x)>>12) & 0xffffff00) | ((x) & 0x000000ff) ))
   8  
   9  #define makedev(x,y) ( \
  10          (((x)&0xfffff000ULL) << 32) | \
  11  	(((x)&0x00000fffULL) << 8) | \
  12          (((y)&0xffffff00ULL) << 12) | \
  13  	(((y)&0x000000ffULL)) )
  14  
  15  #endif
  16