manifest

unix v7是最后一个广泛发布的研究型UNIX版本

# include <stdio.h>
/*	manifest constant file for the lex/yacc interface */

# define ERROR 1
# define NAME 2
# define STRING 3
# define ICON 4
# define FCON 5
# define PLUS 6
# define MINUS 8
# define MUL 11
# define AND 14
# define OR 17
# define ER 19
# define QUEST 21
# define COLON 22
# define ANDAND 23
# define OROR 24

/*	special interfaces for yacc alone */
/*	These serve as abbreviations of 2 or more ops:
	ASOP	=, = ops
	RELOP	LE,LT,GE,GT
	EQUOP	EQ,NE
	DIVOP	DIV,MOD
	SHIFTOP	LS,RS
	ICOP	ICR,DECR
	UNOP	NOT,COMPL
	STROP	DOT,STREF

	*/
# define ASOP 25
# define RELOP 26
# define EQUOP 27
# define DIVOP 28
# define SHIFTOP 29
# define INCOP 30
# define UNOP 31
# define STROP 32

/*	reserved words, etc */
# define TYPE 33
# define CLASS 34
# define STRUCT 35
# define RETURN 36
# define GOTO 37
# define IF 38
# define ELSE 39
# define SWITCH 40
# define BREAK 41
# define CONTINUE 42
# define WHILE 43
# define DO 44
# define FOR 45
# define DEFAULT 46
# define CASE 47
# define SIZEOF 48
# define ENUM 49


/*	little symbols, etc. */
/*	namely,

	LP	(
	RP	)

	LC	{
	RC	}

	LB	[
	RB	]

	CM	,
	SM	;

	*/

# define LP 50
# define RP 51
# define LC 52
# define RC 53
# define LB 54
# define RB 55
# define CM 56
# define SM 57
# define ASSIGN 58

/*	END OF YACC */

/*	left over tree building operators */
# define COMOP 59
# define DIV 60
# define MOD 62
# define LS 64
# define RS 66
# define DOT 68
# define STREF 69
# define CALL 70
# define FORTCALL 73
# define NOT 76
# define COMPL 77
# define INCR 78
# define DECR 79
# define EQ 80
# define NE 81
# define LE 82
# define LT 83
# define GE 84
# define GT 85
# define ULE 86
# define ULT 87
# define UGE 88
# define UGT 89
# define SETBIT 90
# define TESTBIT 91
# define RESETBIT 92
# define ARS 93
# define REG 94
# define OREG 95
# define CCODES 96
# define FREE 97
# define STASG 98
# define STARG 99
# define STCALL 100

/*	some conversion operators */
# define FLD 103
# define SCONV 104
# define PCONV 105
# define PMCONV 106
# define PVCONV 107

/*	special node operators, used for special contexts */
# define FORCE 108
# define CBRANCH 109
# define INIT 110
# define CAST 111

/*	node types */
# define LTYPE 02
# define UTYPE 04
# define BITYPE 010

	/* DSIZE is the size of the dope array */
# define DSIZE CAST+1

/*	type names, used in symbol table building */
# define TNULL PTR    /* pointer to UNDEF */
# define UNDEF 0
# define FARG 1
# define CHAR 2
# define SHORT 3
# define INT 4
# define LONG 5
# define FLOAT 6
# define DOUBLE 7
# define STRTY 8
# define UNIONTY 9
# define ENUMTY 10
# define MOETY 11
# define UCHAR 12
# define USHORT 13
# define UNSIGNED 14
# define ULONG 15

# define ASG 1+
# define UNARY 2+
# define NOASG (-1)+
# define NOUNARY (-2)+

/*	various flags */
# define NOLAB (-1)

/* type modifiers */

# define PTR  020
# define FTN  040
# define ARY  060

/* type packing constants */

# define TMASK 060
# define TMASK1 0300
# define TMASK2  0360
# define BTMASK 017
# define BTSHIFT 4
# define TSHIFT 2

/*	macros	*/

# 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 SETOFF(x,y)   if( x%y != 0 ) x = ( (x/y + 1) * y)
		/* advance x to a multiple of y */
# define NOFIT(x,y,z)   ( (x%z + y) > z )
		/* can y bits be added to x without overflowing z */
	/* pack and unpack field descriptors (size and offset) */
# define PKFIELD(s,o) ((o<<6)|s)
# define UPKFSZ(v)  (v&077)
# define UPKFOFF(v) (v>>6)

/*	operator information */

# define TYFLG 016
# define ASGFLG 01
# define LOGFLG 020

# define SIMPFLG 040
# define COMMFLG 0100
# define DIVFLG 0200
# define FLOFLG 0400
# define LTYFLG 01000
# define CALLFLG 02000
# define MULFLG 04000
# define SHFFLG 010000
# define ASGOPFLG 020000

# define SPFLG 040000

#define optype(o) (dope[o]&TYFLG)
#define asgop(o) (dope[o]&ASGFLG)
#define logop(o) (dope[o]&LOGFLG)
#define callop(o) (dope[o]&CALLFLG)

/*	table sizes	*/

# define BCSZ 100 /* size of the table to save break and continue labels */
# define SYMTSZ 450 /* size of the symbol table */
# define DIMTABSZ 750 /* size of the dimension/size table */
# define PARAMSZ 150 /* size of the parameter stack */
# ifndef FORT
# define TREESZ 350 /* space for building parse tree */
# else
# define TREESZ 1000
# endif
# define SWITSZ 250 /* size of switch table */

# define NCHNAM 8  /* number of characters in a name */

/*	common defined variables */

extern int nerrors;  /* number of errors seen so far */

typedef union ndu NODE;
typedef unsigned int TWORD;
extern NODE *NIL;  /* a pointer which will always have 0 in it */
extern int dope[];  /* a vector containing operator information */
extern char *opst[];  /* a vector containing names for ops */

# ifdef ONEPASS
	/* in one-pass operation, define the tree nodes */

union ndu {

	struct {
		int op;
		int rall;
		TWORD type;
		int su;
		char name[NCHNAM];
		NODE *left;
		NODE *right;
		};
	
	struct {
		int op;
		int rall;
		TWORD type;
		int su;
		char name[NCHNAM];
		CONSZ lval;
		int rval;
		};
	
	struct {
		int op, rall;
		TWORD type;
		int su;
		int label;  /* for use with branching */
		};

	struct {
		int op, rall;
		TWORD type;
		int su;
		int stsize;  /* sizes of structure objects */
		int stalign;  /* alignment of structure objects */
		};

	struct {
		int op;
		int cdim;
		TWORD type;
		int csiz;
		};
	
	struct {
		/* this structure is used when a floating point constant
		   is being computed */
		int op;
		int cdim;
		TWORD type;
		int csiz;
		double dval;
		};

	};
# endif