github.com/afumu/libc@v0.0.6/musl/include/sys/sysmacros.h (about)

     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