defs

unix v7是最后一个广泛发布的研究型UNIX版本

#include <stdio.h>

#ifdef unix
#	include <ctype.h>
#endif

#include "ftypes"
#include "defines"
#include "locdefs"

#define VL 6

#define MAXINCLUDES 10
#define MAXLITERALS 20
#define MAXCTL 20
#define MAXHASH 401
#define MAXSTNO 201
#define MAXEXT 200
#define MAXEQUIV 150
#define MAXLABLIST 125

typedef union expression *expptr;
typedef union taggedblock *tagptr;
typedef union chainedblock *chainp;

extern FILEP infile;
extern FILEP diagfile;
extern FILEP textfile;
extern FILEP asmfile;
extern FILEP initfile;
extern long int headoffset;

extern char token [ ];
extern int toklen;
extern int yylval;
extern int lineno;
extern char *infname;
extern int needkwd;
extern struct labelblock *thislabel;

extern flag profileflag;
extern flag optimflag;
extern flag nowarnflag;
extern flag ftn66flag;
extern flag shiftcase;
extern flag undeftype;
extern flag shortsubs;
extern flag onetripflag;
extern flag checksubs;
extern flag debugflag;
extern int nerr;
extern int nwarn;
extern int ndata;

extern int parstate;
extern flag headerdone;
extern int blklevel;
extern flag saveall;
extern flag substars;
extern int impltype[ ];
extern int implleng[ ];
extern int implstg[ ];

extern int tyint;
extern int tylogical;
extern ftnint typesize[];
extern int typealign[];
extern int procno;
extern int proctype;
extern char * procname;
extern int rtvlabel[ ];
extern int fudgelabel;	/* to confuse the pdp11 optimizer */
extern struct addrblock *typeaddr;
extern struct addrblock *retslot;
extern int cxslot;
extern int chslot;
extern int chlgslot;
extern int procclass;
extern ftnint procleng;
extern int nentry;
extern flag multitype;
extern int blklevel;
extern int lastlabno;
extern int lastvarno;
extern int lastargslot;
extern int argloc;
extern ftnint autoleng;
extern ftnint bssleng;
extern int retlabel;
extern int ret0label;
extern int dorange;
extern int regnum[ ];
extern struct nameblock *regnamep[ ];
extern int maxregvar;
extern int highregvar;
extern int nregvar;

extern chainp templist;
extern chainp holdtemps;
extern struct entrypoint *entries;
extern struct rplblock *rpllist;
extern chainp curdtp;
extern ftnint curdtelt;
extern flag toomanyinit;

extern flag inioctl;
extern int iostmt;
extern struct addrblock *ioblkp;
extern int nioctl;
extern int nequiv;
extern int nintnames;
extern int nextnames;

struct chain
	{
	chainp nextp;
	tagptr datap;
	};

extern chainp chains;

struct ctlframe
	{
	unsigned ctltype:8;
	unsigned dostepsign:8;
	int ctlabels[4];
	int dolabel;
	struct nameblock *donamep;
	expptr domax;
	expptr dostep;
	};
#define endlabel ctlabels[0]
#define elselabel ctlabels[1]
#define dobodylabel ctlabels[1]
#define doposlabel ctlabels[2]
#define doneglabel ctlabels[3]
extern struct ctlframe ctls[ ];
extern struct ctlframe *ctlstack;
extern struct ctlframe *lastctl;

struct extsym
	{
	char extname[XL];
	unsigned extstg:4;
	unsigned extsave:1;
	unsigned extinit:1;
	ptr extp;
	ftnint extleng;
	ftnint maxleng;
	};

extern struct extsym extsymtab[ ];
extern struct extsym *nextext;
extern struct extsym *lastext;

struct labelblock
	{
	int labelno;
	unsigned blklevel:8;
	unsigned labused:1;
	unsigned labinacc:1;
	unsigned labdefined:1;
	unsigned labtype:2;
	ftnint stateno;
	};

extern struct labelblock labeltab[ ];
extern struct labelblock *labtabend;
extern struct labelblock *highlabtab;

struct entrypoint
	{
	chainp nextp;
	struct extsym *entryname;
	chainp arglist;
	int entrylabel;
	int typelabel;
	ptr enamep;
	};

struct primblock
	{
	unsigned tag:4;
	unsigned vtype:4;
	struct nameblock *namep;
	struct listblock *argsp;
	expptr fcharp;
	expptr lcharp;
	};


struct hashentry
	{
	int hashval;
	struct nameblock *varp;
	};
extern struct hashentry hashtab[ ];
extern struct hashentry *lasthash;

struct intrpacked	/* bits for intrinsic function description */
	{
	unsigned f1:3;
	unsigned f2:4;
	unsigned f3:7;
	};

struct nameblock
	{
	unsigned tag:4;
	unsigned vtype:4;
	unsigned vclass:4;
	unsigned vstg:4;
	expptr vleng;
	char varname[VL];
	unsigned vdovar:1;
	unsigned vdcldone:1;
	unsigned vadjdim:1;
	unsigned vsave:1;
	unsigned vprocclass:3;
	unsigned vregno:4;
	union	{
		int varno;
		chainp vstfdesc;	/* points to (formals, expr) pair */
		struct intrpacked intrdesc;	/* bits for intrinsic function */
		} vardesc;
	struct dimblock *vdim;
	int voffset;
	};


struct paramblock
	{
	unsigned tag:4;
	unsigned vtype:4;
	unsigned vclass:4;
	expptr vleng;
	char varname[VL];
	ptr paramval;
	} ;


struct exprblock
	{
	unsigned tag:4;
	unsigned vtype:4;
	unsigned vclass:4;
	expptr vleng;
	unsigned opcode:6;
	expptr leftp;
	expptr rightp;
	};


union constant
	{
	char *ccp;
	ftnint ci;
	double cd[2];
	};

struct constblock
	{
	unsigned tag:4;
	unsigned vtype:4;
	expptr vleng;
	union constant const;
	};


struct listblock
	{
	unsigned tag:4;
	unsigned vtype:4;
	chainp listp;
	};



struct addrblock
	{
	unsigned tag:4;
	unsigned vtype:4;
	unsigned vclass:4;
	unsigned vstg:4;
	expptr vleng;
	int memno;
	expptr memoffset;
	unsigned istemp:1;
	unsigned ntempelt:10;
	};



struct errorblock
	{
	unsigned tag:4;
	unsigned vtype:4;
	};


union expression
	{
	struct exprblock;
	struct addrblock;
	struct constblock;
	struct errorblock;
	struct listblock;
	struct primblock;
	} ;



struct dimblock
	{
	int ndim;
	expptr nelt;
	expptr baseoffset;
	expptr basexpr;
	struct
		{
		expptr dimsize;
		expptr dimexpr;
		} dims[1];
	};


struct impldoblock
	{
	unsigned tag:4;
	unsigned isactive:1;
	unsigned isbusy:1;
	struct nameblock *varnp;
	struct constblock *varvp;
	expptr implb;
	expptr impub;
	expptr impstep;
	ftnint impdiff;
	ftnint implim;
	chainp datalist;
	};


struct rplblock	/* name replacement block */
	{
	chainp nextp;
	struct nameblock *rplnp;
	ptr rplvp;
	struct exprblock *rplxp;
	int rpltag;
	};



struct equivblock
	{
	ptr equivs;
	unsigned eqvinit:1;
	long int eqvtop;
	long int eqvbottom;
	} ;
#define eqvleng eqvtop

extern struct equivblock eqvclass[ ];


struct eqvchain
	{
	chainp nextp;
	ptr eqvitem;
	long int eqvoffset;
	} ;

union chainedblock
	{
	struct chain;
	struct entrypoint;
	struct rplblock;
	struct eqvchain;
	};



union taggedblock
	{
	struct nameblock;
	struct paramblock;
	struct exprblock;
	struct constblock;
	struct listblock;
	struct addrblock;
	struct errorblock;
	struct primblock;
	struct impldoblock;
	} ;




struct literal
	{
	short littype;
	short litnum;
	union	{
		ftnint litival;
		double litdval;
		struct	{
			char litclen;	/* small integer */
			char litcstr[XL];
			} litcval;
		} litval;
	};

extern struct literal litpool[ ];
extern int nliterals;





/* popular functions with non integer return values */


int *ckalloc();
char *varstr(), *nounder(), *varunder();
char *copyn(), *copys();
chainp hookup(), mkchain();
ftnint convci();
char *convic();
char *setdoto();
double convcd();
struct nameblock *mkname();
struct labelblock *mklabel();
struct extsym *mkext(), *newentry();
struct exprblock *addrof(), *call1(), *call2(), *call3(), *call4();
struct addrblock *builtin(), *mktemp(), *mktmpn();
struct addrblock *autovar(), *mklhs(), *mkaddr(), *putconst(), *memversion();
struct constblock *mkintcon();
expptr mkexpr(), mkconv(), mkfunct(), fixexpr(), fixtype();
tagptr cpexpr(), mkprim();
struct errorblock *errnode();