V10/cmd/sdb/cdefs.h

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/*
 * almost verbatim from common/manifest.h in the c compiler
 */

/* type modifiers */

# define PTR  040
# define FTN  0100
# define ARY  0140

/* type packing constants */

# define MTMASK 03
# define BTMASK 037
# define BTSHIFT 5 
# define TSHIFT 2
# define TMASK (MTMASK<<BTSHIFT)
# define TMASK1 (MTMASK<<(BTSHIFT+TSHIFT))
# define TMASK2  (TMASK||MTMASK)

/*	macros	*/

# define ONEBIT(n) (1L<<(n))
# define MODTYPE(x,y) x = (x&(~BTMASK))|y  /* set basic type of x to y */
# define BTYPE(x)  (x&BTMASK)   /* basic type of x */
# define ISUNSIGNED(x) ((x)<=ULONG&&(x)>=UCHAR)
# define UNSIGNABLE(x) ((x)<=LONG&&(x)>=CHAR)
# define ENUNSIGN(x) ((x)+(UNSIGNED-INT))
# define DEUNSIGN(x) ((x)+(INT-UNSIGNED))
# define ISPTR(x) ((x&TMASK)==PTR)
# define ISFTN(x)  ((x&TMASK)==FTN)  /* is x a function type */
# define ISARY(x)   ((x&TMASK)==ARY)   /* is x an array type */
# define INCREF(x) (((x&~BTMASK)<<TSHIFT)|PTR|(x&BTMASK))
# define DECREF(x) (((x>>TSHIFT)&~BTMASK)|(x&BTMASK))
# define PKFIELD(s,o) (((o)<<6)|(s))
# define UPKFSZ(v)  ((v)&077)
# define UPKFOFF(v) ((v)>>6)

#define	MAXTYPE	16	/* largest meaningful type; currently == void */