SpecialsLengthOffset  147 enc/unicode.c  #define SpecialsLengthExtract(n)    ((n)>>SpecialsLengthOffset)
SpecialsLengthOffset  148 enc/unicode.c  #define SpecialsCodepointExtract(n) ((n)&((1<<SpecialsLengthOffset)-1))
SpecialsLengthOffset  149 enc/unicode.c  #define SpecialsLengthEncode(n)     ((n)<<SpecialsLengthOffset)