mfile1

unix v7是最后一个广泛发布的研究型UNIX版本

# include "macdefs"
# include "manifest"

/*	storage classes  */
# define SNULL 0
# define AUTO 1
# define EXTERN 2
# define STATIC 3
# define REGISTER 4
# define EXTDEF 5
# define LABEL 6
# define ULABEL 7
# define MOS 8
# define PARAM 9
# define STNAME 10
# define MOU 11
# define UNAME 12
# define TYPEDEF 13
# define FORTRAN 14
# define ENAME 15
# define MOE 16
# define UFORTRAN 17
# define USTATIC 18
	/* field size is ORed in */
# define FIELD 0100
# define FLDSIZ 077
extern char *scnames();

/*	location counters */
# define PROG 0
# define DATA 1
# define ADATA 2
# define STRNG 3
# define ISTRNG 4
# define STAB 5


/* symbol table flags */
# define SMOS 01
# define SHIDDEN 02
# define SHIDES 04
# define SSET 010
# define SREF 020

# ifndef FIXDEF
# define FIXDEF(p)
#endif

	/* alignment of initialized quantities */
# ifndef AL_INIT
#	define	AL_INIT ALINT
# endif

struct symtab {
	char sname[NCHNAM];
	TWORD stype;  /* type word */

	char sclass;  /* storage class */
	char slevel;  /* scope level */
	char sflags;  /* flags for set, use, hidden, mos, etc. */
	int offset;  /* offset or value */
	short dimoff; /* offset into the dimension table */
	short sizoff; /* offset into the size table */
	short suse;  /* line number of last use of the variable */
	};


# ifdef ONEPASS
/* NOPREF must be defined for use in first pass tree machine */
# define NOPREF 020000  /* no preference for register assignment */
#else

union ndu {
	struct {
		int op;
		TWORD type;
		int cdim, csiz;
		NODE *left;
		NODE * right;
		};
	
	struct {
		/* this structure is the same as above,
		   but is used when a value, rather than
		   address, is kept in +left */
		int op;
		TWORD type;
		int cdim, csiz;
		CONSZ lval;
		int rval;
		};
	
	struct {
		/* this structure is used when a floating point constant
		   is being computed */
		int op;
		TWORD type;
		int cdim, csiz;
		double dval;
		};

	};
# endif

struct sw {
	CONSZ sval;
	int slab;
	};

extern struct sw swtab[];
extern struct sw *swp;
extern int swx;

extern int ftnno;
extern int blevel;
extern int instruct, stwart;

extern int lineno, nerrors;
typedef union {
	int intval;
	NODE * nodep;
	} YYSTYPE;
extern YYSTYPE yylval;

extern CONSZ lastcon;
extern double dcon;

extern char ftitle[];
extern struct symtab stab[];
extern int curftn;
extern int curclass;
extern int curdim;
extern int dimtab[];
extern int paramstk[];
extern int paramno;
extern int autooff, argoff, strucoff;
extern int regvar;
extern int minrvar;
extern int brkflag;
extern char yytext[];

extern int strflg;

extern OFFSZ inoff;

extern int reached;

/*	tunnel to buildtree for name id's */

extern int idname;

extern NODE node[];
extern NODE *lastfree;

extern int cflag, hflag, pflag;

/* various labels */
extern int brklab;
extern int contlab;
extern int flostat;
extern int retlab;
extern int retstat;
extern int asavbc[], *psavbc;

/*	flags used in structures/unions */

# define SEENAME 01
# define INSTRUCT 02
# define INUNION 04
# define FUNNYNAME 010

/*	flags used in the (elementary) flow analysis ... */

# define FBRK 02
# define FCONT 04
# define FDEF 010
# define FLOOP 020

/*	flags used for return status */

# define RETVAL 1
# define NRETVAL 2

/*	used to mark a constant with no name field */

# define NONAME 040000

	/* mark an offset which is undefined */

# define NOOFFSET (-10201)

/*	declarations of various functions */

extern NODE
	*buildtree(),
	*bdty(),
	*mkty(),
	*rstruct(),
	*dclstruct(),
	*getstr(),
	*tymerge(),
	*stref(),
	*offcon(),
	*bcon(),
	*bpsize(),
	*convert(),
	*pconvert(),
	*oconvert(),
	*ptmatch(),
	*tymatch(),
	*makety(),
	*block(),
	*doszof(),
	*talloc(),
	*optim(),
	*strargs(),
	*clocal();

OFFSZ	tsize(),
	psize();

TWORD	types();


double atof();

char *exname(), *exdcon();

# define checkst(x)

# ifndef CHARCAST
/* to make character constants into character connstants */
/* this is a macro to defend against cross-compilers, etc. */
# define CHARCAST(x) (char)(x)
# endif