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Revision 1.13, Fri Nov 15 14:32:33 2002 UTC (15 years, 8 months ago) by christos
Branch: MAIN
CVS Tags: fvdl_fs64_base
Changes since 1.12: +4 -2 lines

PR/18995: David Laight: libedit fixes for posix conformant sh

The posix 'sh' specification defines vi-mode editing quite tightly.
The netbsd libedit code (used by sh to do this) was missing several
features, there were also minor errors in others.

Compare netbsd sh to the definition available from:
http://www.opengroup.org/onlinepubs/007904975/utilities/sh.html
In particular the following were not supported:
	U - undo all changes to line
	| - goto column
	Y - yank to end of line
	y - yank
	# - comment out current line
	@ - take input from shell alias [1]
	G - goto numbered line in history buffer
	v - edit history line with vi
	_ - append word from last input line
	. - redo last command
Other minor changes have also been made.

[1] This needs the shell to define an appropriate routine to
return the text of the alias.  There is no requirement that
such a function exist.

/*	$NetBSD: el.h,v 1.13 2002/11/15 14:32:33 christos Exp $	*/

/*-
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Christos Zoulas of Cornell University.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)el.h	8.1 (Berkeley) 6/4/93
 */

/*
 * el.h: Internal structures.
 */
#ifndef _h_el
#define	_h_el
/*
 * Local defaults
 */
#define	KSHVI
#define	VIDEFAULT
#define	ANCHOR

#include <stdio.h>
#include <sys/types.h>

#define	EL_BUFSIZ	1024		/* Maximum line size		*/

#define	HANDLE_SIGNALS	1<<0
#define	NO_TTY		1<<1
#define	EDIT_DISABLED	1<<2

typedef int bool_t;			/* True or not			*/

typedef unsigned char el_action_t;	/* Index to command array	*/

typedef struct coord_t {		/* Position on the screen	*/
	int	h;
	int	v;
} coord_t;

typedef struct el_line_t {
	char	*buffer;		/* Input line			*/
	char	*cursor;		/* Cursor position		*/
	char	*lastchar;		/* Last character		*/
	const char	*limit;		/* Max position			*/
} el_line_t;

/*
 * Editor state
 */
typedef struct el_state_t {
	int		inputmode;	/* What mode are we in?		*/
	int		doingarg;	/* Are we getting an argument?	*/
	int		argument;	/* Numeric argument		*/
	int		metanext;	/* Is the next char a meta char */
	el_action_t	lastcmd;	/* Previous command		*/
	el_action_t	thiscmd;	/* this command 		*/
	char		thisch;		/* char that generated it	*/
} el_state_t;

/*
 * Until we come up with something better...
 */
#define	el_malloc(a)	malloc(a)
#define	el_realloc(a,b)	realloc(a, b)
#define	el_free(a)	free(a)

#include "tty.h"
#include "prompt.h"
#include "key.h"
#include "term.h"
#include "refresh.h"
#include "chared.h"
#include "common.h"
#include "search.h"
#include "hist.h"
#include "map.h"
#include "parse.h"
#include "sig.h"
#include "help.h"
#include "read.h"

struct editline {
	char		 *el_prog;	/* the program name		*/
	FILE		 *el_outfile;	/* Stdio stuff			*/
	FILE		 *el_errfile;	/* Stdio stuff			*/
	int		  el_infd;	/* Input file descriptor	*/
	int		  el_flags;	/* Various flags.		*/
	coord_t		  el_cursor;	/* Cursor location		*/
	char		**el_display;	/* Real screen image = what is there */
	char		**el_vdisplay;	/* Virtual screen image = what we see */
	void		 *el_data;	/* Client data			*/
	el_line_t	  el_line;	/* The current line information	*/
	el_state_t	  el_state;	/* Current editor state		*/
	el_term_t	  el_term;	/* Terminal dependent stuff	*/
	el_tty_t	  el_tty;	/* Tty dependent stuff		*/
	el_refresh_t	  el_refresh;	/* Refresh stuff		*/
	el_prompt_t	  el_prompt;	/* Prompt stuff			*/
	el_prompt_t	  el_rprompt;	/* Prompt stuff			*/
	el_chared_t	  el_chared;	/* Characted editor stuff	*/
	el_map_t	  el_map;	/* Key mapping stuff		*/
	el_key_t	  el_key;	/* Key binding stuff		*/
	el_history_t	  el_history;	/* History stuff		*/
	el_search_t	  el_search;	/* Search stuff			*/
	el_signal_t	  el_signal;	/* Signal handling stuff	*/
	el_read_t	  el_read;	/* Character reading stuff	*/
};

protected int	el_editmode(EditLine *, int, const char **);

#ifdef DEBUG
#define	EL_ABORT(a)	do { \
				fprintf(el->el_errfile, "%s, %d: ", \
					 __FILE__, __LINE__); \
				fprintf a; \
				abort(); \
			} while( /*CONSTCOND*/0);
#else
#define EL_ABORT(a)	abort()
#endif
#endif /* _h_el */