cdefs.h

Macros

ARY               X
BTMASK            X
BTSHIFT           X
BTYPE             X
DECREF            X
DEUNSIGN          X
ENUNSIGN          X
FTN               X
INCREF            X
ISARY             X
ISFTN             X
ISPTR             X
ISUNSIGNED        X
PKFIELD           X
PTR               X
TMASK             X
TMASK1            X
TMASK2            X
TSHIFT            X
UNSIGNABLE        X
UPKFOFF           X
UPKFSZ            X

   1: /* "@(#)cdefs.h 4.2 8/17/82" */
   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)