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

     1  #define bittab __fsmu8
     2  
     3  #include <stdint.h>
     4  #include <features.h>
     5  
     6  extern hidden const uint32_t bittab[];
     7  
     8  /* Upper 6 state bits are a negative integer offset to bound-check next byte */
     9  /*    equivalent to: ( (b-0x80) | (b+offset) ) & ~0x3f      */
    10  #define OOB(c,b) (((((b)>>3)-0x10)|(((b)>>3)+((int32_t)(c)>>26))) & ~7)
    11  
    12  /* Interval [a,b). Either a must be 80 or b must be c0, lower 3 bits clear. */
    13  #define R(a,b) ((uint32_t)((a==0x80 ? 0x40u-b : 0u-a) << 23))
    14  #define FAILSTATE R(0x80,0x80)
    15  
    16  #define SA 0xc2u
    17  #define SB 0xf4u
    18  
    19  /* Arbitrary encoding for representing code units instead of characters. */
    20  #define CODEUNIT(c) (0xdfff & (signed char)(c))
    21  #define IS_CODEUNIT(c) ((unsigned)(c)-0xdf80 < 0x80)
    22  
    23  /* Get inline definition of MB_CUR_MAX. */
    24  #include "locale_impl.h"