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Annotation of researchv10dc/cmd/sdb/cdefs.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * almost verbatim from common/manifest.h in the c compiler
        !             3:  */
        !             4: 
        !             5: /* type modifiers */
        !             6: 
        !             7: # define PTR  040
        !             8: # define FTN  0100
        !             9: # define ARY  0140
        !            10: 
        !            11: /* type packing constants */
        !            12: 
        !            13: # define MTMASK 03
        !            14: # define BTMASK 037
        !            15: # define BTSHIFT 5 
        !            16: # define TSHIFT 2
        !            17: # define TMASK (MTMASK<<BTSHIFT)
        !            18: # define TMASK1 (MTMASK<<(BTSHIFT+TSHIFT))
        !            19: # define TMASK2  (TMASK||MTMASK)
        !            20: 
        !            21: /*     macros  */
        !            22: 
        !            23: # define ONEBIT(n) (1L<<(n))
        !            24: # define MODTYPE(x,y) x = (x&(~BTMASK))|y  /* set basic type of x to y */
        !            25: # define BTYPE(x)  (x&BTMASK)   /* basic type of x */
        !            26: # define ISUNSIGNED(x) ((x)<=ULONG&&(x)>=UCHAR)
        !            27: # define UNSIGNABLE(x) ((x)<=LONG&&(x)>=CHAR)
        !            28: # define ENUNSIGN(x) ((x)+(UNSIGNED-INT))
        !            29: # define DEUNSIGN(x) ((x)+(INT-UNSIGNED))
        !            30: # define ISPTR(x) ((x&TMASK)==PTR)
        !            31: # define ISFTN(x)  ((x&TMASK)==FTN)  /* is x a function type */
        !            32: # define ISARY(x)   ((x&TMASK)==ARY)   /* is x an array type */
        !            33: # define INCREF(x) (((x&~BTMASK)<<TSHIFT)|PTR|(x&BTMASK))
        !            34: # define DECREF(x) (((x>>TSHIFT)&~BTMASK)|(x&BTMASK))
        !            35: # define PKFIELD(s,o) (((o)<<6)|(s))
        !            36: # define UPKFSZ(v)  ((v)&077)
        !            37: # define UPKFOFF(v) ((v)>>6)
        !            38: 
        !            39: #define        MAXTYPE 16      /* largest meaningful type; currently == void */

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