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Annotation of 41BSD/cmd/sdb/cdefs.h, revision 1.1.1.1

1.1       root        1: /* "@(#)cdefs.h 4.1 10/9/80" */
                      2: /* type modifiers */
                      3: 
                      4: # define PTR  020
                      5: # define FTN  040
                      6: # define ARY  060
                      7: 
                      8: /* type packing constants */
                      9: 
                     10: # define TMASK 060
                     11: # define TMASK1 0300
                     12: # define TMASK2  0360
                     13: # define BTMASK 017
                     14: # define BTSHIFT 4
                     15: # define TSHIFT 2
                     16: 
                     17: /*     macros  */
                     18: 
                     19: # define BTYPE(x)  (x&BTMASK)   /* basic type of x */
                     20: # define ISUNSIGNED(x) ((x)<=ULONG&&(x)>=UCHAR)
                     21: # define UNSIGNABLE(x) ((x)<=LONG&&(x)>=CHAR)
                     22: # define ENUNSIGN(x) ((x)+(UNSIGNED-INT))
                     23: # define DEUNSIGN(x) ((x)+(INT-UNSIGNED))
                     24: # define ISPTR(x) ((x&TMASK)==PTR)
                     25: # define ISFTN(x)  ((x&TMASK)==FTN)  /* is x a function type */
                     26: # define ISARY(x)   ((x&TMASK)==ARY)   /* is x an array type */
                     27: # define INCREF(x) (((x&~BTMASK)<<TSHIFT)|PTR|(x&BTMASK))
                     28: # define DECREF(x) (((x>>TSHIFT)&~BTMASK&0x3fff)|(x&BTMASK))
                     29:        /* pack and unpack field descriptors (size and offset) */
                     30: # define PKFIELD(s,o) ((o<<6)|s)
                     31: # define UPKFSZ(v)  (v&077)
                     32: # define UPKFOFF(v) (v>>6)
                     33: 

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