github.com/afumu/libc@v0.0.6/musl/src/multibyte/internal.c (about)

     1  #include "internal.h"
     2  
     3  #define C(x) ( x<2 ? -1 : ( R(0x80,0xc0) | x ) )
     4  #define D(x) C((x+16))
     5  #define E(x) ( ( x==0 ? R(0xa0,0xc0) : \
     6                   x==0xd ? R(0x80,0xa0) : \
     7                   R(0x80,0xc0) ) \
     8               | ( R(0x80,0xc0) >> 6 ) \
     9               | x )
    10  #define F(x) ( ( x>=5 ? 0 : \
    11                   x==0 ? R(0x90,0xc0) : \
    12                   x==4 ? R(0x80,0x90) : \
    13                   R(0x80,0xc0) ) \
    14               | ( R(0x80,0xc0) >> 6 ) \
    15               | ( R(0x80,0xc0) >> 12 ) \
    16               | x )
    17  
    18  const uint32_t bittab[] = {
    19  	              C(0x2),C(0x3),C(0x4),C(0x5),C(0x6),C(0x7),
    20  	C(0x8),C(0x9),C(0xa),C(0xb),C(0xc),C(0xd),C(0xe),C(0xf),
    21  	D(0x0),D(0x1),D(0x2),D(0x3),D(0x4),D(0x5),D(0x6),D(0x7),
    22  	D(0x8),D(0x9),D(0xa),D(0xb),D(0xc),D(0xd),D(0xe),D(0xf),
    23  	E(0x0),E(0x1),E(0x2),E(0x3),E(0x4),E(0x5),E(0x6),E(0x7),
    24  	E(0x8),E(0x9),E(0xa),E(0xb),E(0xc),E(0xd),E(0xe),E(0xf),
    25  	F(0x0),F(0x1),F(0x2),F(0x3),F(0x4)
    26  };