/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #pragma	varargck	argpos	editerror	1 typedef struct Addr	Addr;typedef struct Address	Address;typedef struct Cmd	Cmd;typedef struct List	List;typedef struct String	String; struct String{	int	n;		/* excludes NUL */	Rune	*r;		/* includes NUL */	int	nalloc;}; struct Addr{	char	type;	/* # (char addr), l (line addr), / ? . $ + - , ; */	union{		String	*re;		Addr	*left;		/* left side of , and ; */	};	ulong	num;	Addr	*next;			/* or right side of , and ; */}; struct Address{	Range	r;	File	*f;}; struct Cmd{	Addr	*addr;			/* address (range of text) */	String	*re;			/* regular expression for e.g. 'x' */	union{		Cmd	*cmd;		/* target of x, g, {, etc. */		String	*text;		/* text of a, c, i; rhs of s */		Addr	*mtaddr;		/* address for m, t */	};	Cmd	*next;			/* pointer to next element in {} */	short	num;	ushort	flag;			/* whatever */	ushort	cmdc;			/* command character; 'x' etc. */}; extern struct cmdtab{	ushort	cmdc;		/* command character */	uchar	text;		/* takes a textual argument? */	uchar	regexp;		/* takes a regular expression? */	uchar	addr;		/* takes an address (m or t)? */	uchar	defcmd;		/* default command; 0==>none */	uchar	defaddr;	/* default address */	uchar	count;		/* takes a count e.g. s2/// */	char	*token;		/* takes text terminated by one of these */	int	(*fn)(Text*, Cmd*);	/* function to call with parse tree */}cmdtab[]; #define	INCR	25	/* delta when growing list */ struct List{	int	nalloc;	int	nused;	union{		void	*listptr;		void*	*ptr;		uchar*	*ucharptr;		String*	*stringptr;	};}; enum Defaddr{	/* default addresses */	aNo,	aDot,	aAll,}; int	nl_cmd(Text*, Cmd*), a_cmd(Text*, Cmd*), b_cmd(Text*, Cmd*);int	c_cmd(Text*, Cmd*), d_cmd(Text*, Cmd*);int	B_cmd(Text*, Cmd*), D_cmd(Text*, Cmd*), e_cmd(Text*, Cmd*);int	f_cmd(Text*, Cmd*), g_cmd(Text*, Cmd*), i_cmd(Text*, Cmd*);int	k_cmd(Text*, Cmd*), m_cmd(Text*, Cmd*), n_cmd(Text*, Cmd*);int	p_cmd(Text*, Cmd*);int	s_cmd(Text*, Cmd*), u_cmd(Text*, Cmd*), w_cmd(Text*, Cmd*);int	x_cmd(Text*, Cmd*), X_cmd(Text*, Cmd*), pipe_cmd(Text*, Cmd*);int	eq_cmd(Text*, Cmd*); String	*allocstring(int);void	freestring(String*);String	*getregexp(int);Addr	*newaddr(void);Address	cmdaddress(Addr*, Address, int);int	cmdexec(Text*, Cmd*);void	editerror(char*, ...);int	cmdlookup(int);void	resetxec(void);void	Straddc(String*, int);