tdat.h - plan9port - [fork] Plan 9 from user space
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       tdat.h (363B)
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            1 #define        mpdighi  (mpdigit)((ulong)1<<(Dbits-1))
            2 #define DIGITS(x) ((Dbits - 1 + (x))/Dbits)
            3 
            4 /* for converting between int's and mpint's */
            5 #define MAXUINT ((uint)-1)
            6 #define MAXINT (MAXUINT>>1)
            7 #define MININT (MAXINT+1)
            8 
            9 /* for converting between vlongs's and mpint's */
           10 #define MAXUVLONG (~0ULL)
           11 #define MAXVLONG (MAXUVLONG>>1)
           12 #define MINVLONG (MAXVLONG+1ULL)