[unix-history] / usr / src / cmd / awk / awk.def

#define	xfree(a)	{ if(a!=NULL) yfree(a); a=NULL;}
#define yfree free
#ifdef	DEBUG
#	define	dprintf	if(dbg)printf
#else
#	define	dprintf(x1, x2, x3, x4)
#endif
typedef	double	awkfloat;

extern char	**FS;
extern char	**RS;
extern char	**ORS;
extern char	**OFS;
extern char	**OFMT;
extern awkfloat *NR;
extern awkfloat *NF;
extern char	**FILENAME;

extern char	record[];
extern int	dbg;
extern int	lineno;
extern int	errorflag;
extern int	donefld;	/* 1 if record broken into fields */
extern int	donerec;	/* 1 if record is valid (no fld has changed */

typedef struct val {	/* general value during processing */
	char	*nval;	/* name, for variables only */
	char	*sval;	/* string value */
	awkfloat	fval;	/* value as number */
	unsigned	tval;	/* type info */
	struct val	*nextval;	/* ptr to next if chained */
} cell;
extern cell *symtab[];
cell	*setsymtab(), *lookup(), **makesymtab();

extern cell	*recloc;	/* location of input record */
extern cell	*nrloc;		/* NR */
extern cell	*nfloc;		/* NF */

#define	STR	01	/* string value is valid */
#define	NUM	02	/* number value is valid */
#define FLD	04	/* FLD means don't free string space */
#define	CON	010	/* this is a constant */
#define	ARR	020	/* this is an array */

awkfloat setfval(), getfval();
char	*setsval(), *getsval();
char	*tostring(), *tokname(), *malloc();
double	log(), sqrt(), exp(), atof();

/* function types */
#define	FLENGTH	1
#define	FSQRT	2
#define	FEXP	3
#define	FLOG	4
#define	FINT	5

typedef struct {
	char otype;
	char osub;
	cell *optr;
} obj;

#define BOTCH	1
struct nd {
	char ntype;
	char subtype;
	struct nd *nnext;
	int nobj;
	struct nd *narg[BOTCH];	/* C won't take a zero length array */
};
typedef struct nd node;
extern node	*winner;
extern node	*nullstat;

/* otypes */
#define OCELL	0
#define OEXPR	1
#define OBOOL	2
#define OJUMP	3

/* cell subtypes */
#define CTEMP	4
#define CNAME	3 
#define CVAR	2
#define CFLD	1
#define CCON	0

/* bool subtypes */
#define BTRUE	1
#define BFALSE	2

/* jump subtypes */
#define JEXIT	1
#define JNEXT	2
#define	JBREAK	3
#define	JCONT	4

/* node types */
#define NVALUE	1
#define NSTAT	2
#define NEXPR	3
#define NPA2	4

extern obj	(*proctab[])();
extern obj	true, false;
extern int	pairstack[], paircnt;

#define cantexec(n)	(n->ntype == NVALUE)
#define notlegal(n)	(proctab[n-FIRSTTOKEN]== nullproc)
#define isexpr(n)	(n->ntype == NEXPR)
#define isjump(n)	(n.otype == OJUMP)
#define isexit(n)	(n.otype == OJUMP && n.osub == JEXIT)
#define	isbreak(n)	(n.otype == OJUMP && n.osub == JBREAK)
#define	iscont(n)	(n.otype == OJUMP && n.osub == JCONT)
#define	isnext(n)	(n.otype == OJUMP && n.osub == JNEXT)
#define isstr(n)	(n.optr->tval & STR)
#define istrue(n)	(n.otype == OBOOL && n.osub == BTRUE)
#define istemp(n)	(n.otype == OCELL && n.osub == CTEMP)
#define isfld(n)	(!donefld && n.osub==CFLD && n.otype==OCELL && n.optr->nval==0)
#define isrec(n)	(donefld && n.osub==CFLD && n.otype==OCELL && n.optr->nval!=0)
obj	nullproc();
obj	relop();

#define MAXSYM	16
#define	HAT	0177	/* matches ^ in regular expr */
			/* watch out for mach dep */
Commit	Line	Data
42d6e430 BJ	1	#define xfree(a) { if(a!=NULL) yfree(a); a=NULL;}
	2	#define yfree free
	3	#ifdef DEBUG
	4	# define dprintf if(dbg)printf
	5	#else
	6	# define dprintf(x1, x2, x3, x4)
	7	#endif
	8	typedef double awkfloat;
	9
	10	extern char **FS;
	11	extern char **RS;
	12	extern char **ORS;
	13	extern char **OFS;
	14	extern char **OFMT;
	15	extern awkfloat *NR;
	16	extern awkfloat *NF;
	17	extern char **FILENAME;
	18
	19	extern char record[];
	20	extern int dbg;
	21	extern int lineno;
	22	extern int errorflag;
	23	extern int donefld; /* 1 if record broken into fields */
	24	extern int donerec; /* 1 if record is valid (no fld has changed */
	25
	26	typedef struct val { /* general value during processing */
	27	char nval; / name, for variables only */
	28	char sval; / string value */
	29	awkfloat fval; /* value as number */
	30	unsigned tval; /* type info */
	31	struct val nextval; / ptr to next if chained */
	32	} cell;
	33	extern cell *symtab[];
	34	cell setsymtab(), lookup(), **makesymtab();
	35
	36	extern cell recloc; / location of input record */
	37	extern cell nrloc; / NR */
	38	extern cell nfloc; / NF */
	39
	40	#define STR 01 /* string value is valid */
	41	#define NUM 02 /* number value is valid */
	42	#define FLD 04 /* FLD means don't free string space */
	43	#define CON 010 /* this is a constant */
	44	#define ARR 020 /* this is an array */
	45
	46	awkfloat setfval(), getfval();
	47	char setsval(), getsval();
	48	char tostring(), tokname(), *malloc();
	49	double log(), sqrt(), exp(), atof();
	50
	51	/* function types */
	52	#define FLENGTH 1
	53	#define FSQRT 2
	54	#define FEXP 3
	55	#define FLOG 4
	56	#define FINT 5
	57
	58	typedef struct {
	59	char otype;
	60	char osub;
	61	cell *optr;
	62	} obj;
	63
	64	#define BOTCH 1
65	struct nd {
66	char ntype;
67	char subtype;
68	struct nd *nnext;
69	int nobj;
70	struct nd narg[BOTCH]; / C won't take a zero length array */
71	};
72	typedef struct nd node;
73	extern node *winner;
74	extern node *nullstat;
75
76	/* otypes */
77	#define OCELL 0
78	#define OEXPR 1
79	#define OBOOL 2
80	#define OJUMP 3
81
82	/* cell subtypes */
83	#define CTEMP 4
84	#define CNAME 3
85	#define CVAR 2
86	#define CFLD 1
87	#define CCON 0
88
89	/* bool subtypes */
90	#define BTRUE 1
91	#define BFALSE 2
92
93	/* jump subtypes */
94	#define JEXIT 1
95	#define JNEXT 2
96	#define JBREAK 3
97	#define JCONT 4
98
99	/* node types */
100	#define NVALUE 1
101	#define NSTAT 2
102	#define NEXPR 3
103	#define NPA2 4
104
105	extern obj (*proctab[])();
106	extern obj true, false;
107	extern int pairstack[], paircnt;
108
109	#define cantexec(n) (n->ntype == NVALUE)
110	#define notlegal(n) (proctab[n-FIRSTTOKEN]== nullproc)
111	#define isexpr(n) (n->ntype == NEXPR)
112	#define isjump(n) (n.otype == OJUMP)
113	#define isexit(n) (n.otype == OJUMP && n.osub == JEXIT)
114	#define isbreak(n) (n.otype == OJUMP && n.osub == JBREAK)
115	#define iscont(n) (n.otype == OJUMP && n.osub == JCONT)
116	#define isnext(n) (n.otype == OJUMP && n.osub == JNEXT)
117	#define isstr(n) (n.optr->tval & STR)
118	#define istrue(n) (n.otype == OBOOL && n.osub == BTRUE)
119	#define istemp(n) (n.otype == OCELL && n.osub == CTEMP)
120	#define isfld(n) (!donefld && n.osub==CFLD && n.otype==OCELL && n.optr->nval==0)
121	#define isrec(n) (donefld && n.osub==CFLD && n.otype==OCELL && n.optr->nval!=0)
122	obj nullproc();
123	obj relop();
124
125	#define MAXSYM 16
126	#define HAT 0177 /* matches ^ in regular expr */
127	/* watch out for mach dep */