/****************************************************************
Copyright (C) Lucent Technologies 1997
All Rights Reserved

Permission to use, copy, modify, and distribute this software and
its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name Lucent Technologies or any of
its entities not be used in advertising or publicity pertaining
to distribution of the software without specific, written prior
permission.

LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
THIS SOFTWARE.
****************************************************************/

extern	int	yywrap(void);
extern	void	setfname(Cell *);
extern	int	constnode(Node *);
extern	char	*strnode(Node *);
extern	Node	*notnull(Node *);
extern	int	yyparse(void);

extern	int	yylex(void);
extern	void	startreg(void);
extern	int	input(void);
extern	void	unput(int);
extern	void	unputstr(char *);
extern	int	yylook(void);
extern	int	yyback(int *, int);
extern	int	yyinput(void);

extern	void	*compre(char *);
extern	int	hexstr(char **);
extern	void	quoted(char **, char **, char *);
extern	int	match(void *, char *, char *);
extern	int	pmatch(void *, char *, char *);
extern	int	nematch(void *, char *, char *);
extern	int	countposn(char *, Rune);
extern	void	overflow(void);

extern	int	pgetc(void);
extern	char	*cursource(void);

extern	Node	*nodealloc(int);
extern	Node	*exptostat(Node *);
extern	Node	*node1(int, Node *);
extern	Node	*node2(int, Node *, Node *);
extern	Node	*node3(int, Node *, Node *, Node *);
extern	Node	*node4(int, Node *, Node *, Node *, Node *);
extern	Node	*stat3(int, Node *, Node *, Node *);
extern	Node	*op2(int, Node *, Node *);
extern	Node	*op1(int, Node *);
extern	Node	*stat1(int, Node *);
extern	Node	*op3(int, Node *, Node *, Node *);
extern	Node	*op4(int, Node *, Node *, Node *, Node *);
extern	Node	*stat2(int, Node *, Node *);
extern	Node	*stat4(int, Node *, Node *, Node *, Node *);
extern	Node	*celltonode(Cell *, int);
extern	Node	*rectonode(void);
extern	Node	*makearr(Node *);
extern	Node	*pa2stat(Node *, Node *, Node *);
extern	Node	*linkum(Node *, Node *);
extern	void	defn(Cell *, Node *, Node *);
extern	int	isarg(char *);
extern	char	*tokname(int);
extern	Cell	*(*proctab[])(Node **, int);
extern	int	ptoi(void *);
extern	Node	*itonp(int);

extern	void	syminit(void);
extern	void	arginit(int, char **);
extern	void	envinit(char **);
extern	Array	*makesymtab(int);
extern	void	freesymtab(Cell *);
extern	void	freeelem(Cell *, char *);
extern	Cell	*setsymtab(char *, char *, double, unsigned int, Array *);
extern	int	hash(char *, int);
extern	void	rehash(Array *);
extern	Cell	*lookup(char *, Array *);
extern	double	setfval(Cell *, double);
extern	void	funnyvar(Cell *, char *);
extern	char	*setsval(Cell *, char *);
extern	double	getfval(Cell *);
extern	char	*getsval(Cell *);
extern	char	*tostring(char *);
extern	char	*qstring(char *, int);

extern	void	recinit(unsigned int);
extern	void	initgetrec(void);
extern	void	makefields(int, int);
extern	void	growfldtab(int n);
extern	int	getrec(char **, int *, int);
extern	void	nextfile(void);
extern	int	readrec(char **buf, int *bufsize, Biobuf *inf);
extern	char	*getargv(int);
extern	void	setclvar(char *);
extern	void	fldbld(void);
extern	void	cleanfld(int, int);
extern	void	newfld(int);
extern	int	refldbld(char *, char *);
extern	void	recbld(void);
extern	Cell	*fieldadr(int);
extern	void	yyerror(char *);
extern	int	fpecatch(void *, char *);
extern	void	bracecheck(void);
extern	void	bcheck2(int, int, int);
extern	void	SYNTAX(char *, ...);
extern	void	FATAL(char *, ...);
extern	void	WARNING(char *, ...);
extern	void	error(void);
extern	void	eprint(void);
extern	void	bclass(int);
extern	double	errcheck(double, char *);
extern	int	isclvar(char *);
extern	int	is_number(char *);

extern	int	adjbuf(char **pb, int *sz, int min, int q, char **pbp, char *what);
extern	void	run(Node *);
extern	Cell	*execute(Node *);
extern	Cell	*program(Node **, int);
extern	Cell	*call(Node **, int);
extern	Cell	*copycell(Cell *);
extern	Cell	*arg(Node **, int);
extern	Cell	*jump(Node **, int);
extern	Cell	*getline(Node **, int);
extern	Cell	*getnf(Node **, int);
extern	Cell	*array(Node **, int);
extern	Cell	*awkdelete(Node **, int);
extern	Cell	*intest(Node **, int);
extern	Cell	*matchop(Node **, int);
extern	Cell	*boolop(Node **, int);
extern	Cell	*relop(Node **, int);
extern	void	tfree(Cell *);
extern	Cell	*gettemp(void);
extern	Cell	*field(Node **, int);
extern	Cell	*indirect(Node **, int);
extern	Cell	*substr(Node **, int);
extern	Cell	*sindex(Node **, int);
extern	int	format(char **, int *, char *, Node *);
extern	Cell	*awksprintf(Node **, int);
extern	Cell	*awkprintf(Node **, int);
extern	Cell	*arith(Node **, int);
extern	double	ipow(double, int);
extern	Cell	*incrdecr(Node **, int);
extern	Cell	*assign(Node **, int);
extern	Cell	*cat(Node **, int);
extern	Cell	*pastat(Node **, int);
extern	Cell	*dopa2(Node **, int);
extern	Cell	*split(Node **, int);
extern	Cell	*condexpr(Node **, int);
extern	Cell	*ifstat(Node **, int);
extern	Cell	*whilestat(Node **, int);
extern	Cell	*dostat(Node **, int);
extern	Cell	*forstat(Node **, int);
extern	Cell	*instat(Node **, int);
extern	Cell	*bltin(Node **, int);
extern	Cell	*printstat(Node **, int);
extern	Cell	*nullproc(Node **, int);
extern	Biobuf	*redirect(int, Node *);
extern	Biobuf	*openfile(int, char *);
extern	Biobuf	*fd2buf(int fd, int mode);
extern	char	*filename(Biobuf *);
extern	Cell	*closefile(Node **, int);
extern	void	closeall(void);
extern	Cell	*sub(Node **, int);
extern	Cell	*gsub(Node **, int);

extern	Biobuf	*popen(char *, char *);
extern	int	pclose(Biobuf *);
extern	int	system(char *cmd);