common.c

早期freebsd实现

/*-
 * 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.
 */

#if !defined(lint) && !defined(SCCSID)
static char sccsid[] = "@(#)common.c	8.1 (Berkeley) 6/4/93";
#endif /* not lint && not SCCSID */

/*
 * common.c: Common Editor functions
 */
#include "sys.h"
#include "el.h"

/* ed_end_of_file(): 
 *	Indicate end of file
 *	[^D]
 */
protected el_action_t
/*ARGSUSED*/
ed_end_of_file(el, c)
    EditLine *el;
    int c;
{
    re_goto_bottom(el);
    *el->el_line.lastchar = '\0';
    return CC_EOF;
}


/* ed_insert(): 
 *	Add character to the line
 *	Insert a character [bound to all insert keys]
 */
protected el_action_t
ed_insert(el, c)
    EditLine *el;
    int c;
{
    int i;

    if (c == '\0')
	return CC_ERROR;

    if (el->el_line.lastchar + el->el_state.argument >= 
	el->el_line.limit)
	return CC_ERROR;	/* end of buffer space */

    if (el->el_state.argument == 1) {
	if (el->el_state.inputmode != MODE_INSERT) {
	    el->el_chared.c_undo.buf[el->el_chared.c_undo.isize++] = 
		*el->el_line.cursor;
	    el->el_chared.c_undo.buf[el->el_chared.c_undo.isize] = '\0';
	    c_delafter(el, 1);   
    	}

        c_insert(el, 1);

	*el->el_line.cursor++ = c;
	el->el_state.doingarg = 0;		/* just in case */
	re_fastaddc(el);			/* fast refresh for one char. */
    }
    else {
	if (el->el_state.inputmode != MODE_INSERT) {

	    for(i = 0;i < el->el_state.argument; i++) 
		el->el_chared.c_undo.buf[el->el_chared.c_undo.isize++] = 
			el->el_line.cursor[i];

	    el->el_chared.c_undo.buf[el->el_chared.c_undo.isize] = '\0';
	    c_delafter(el, el->el_state.argument);   
    	}

        c_insert(el, el->el_state.argument);

	while (el->el_state.argument--)
	    *el->el_line.cursor++ = c;
	re_refresh(el);
    }

    if (el->el_state.inputmode == MODE_REPLACE_1)
	(void) vi_command_mode(el, 0);

    return CC_NORM;
}


/* ed_delete_prev_word(): 
 *	Delete from beginning of current word to cursor
 *	[M-^?] [^W]
 */
protected el_action_t
/*ARGSUSED*/
ed_delete_prev_word(el, c)
    EditLine *el;
    int c;
{
    char *cp, *p, *kp;

    if (el->el_line.cursor == el->el_line.buffer)
	return CC_ERROR;

    cp = c__prev_word(el->el_line.cursor, el->el_line.buffer, 
		      el->el_state.argument, ce__isword);

    for (p = cp, kp = el->el_chared.c_kill.buf; p < el->el_line.cursor; p++)
	*kp++ = *p;
    el->el_chared.c_kill.last = kp;

    c_delbefore(el, el->el_line.cursor - cp);	/* delete before dot */
    el->el_line.cursor = cp;
    if (el->el_line.cursor < el->el_line.buffer)
	el->el_line.cursor = el->el_line.buffer;	/* bounds check */
    return CC_REFRESH;
}


/* ed_delete_next_char(): 
 *	Delete character under cursor
 *	[^D] [x]
 */
protected el_action_t
/*ARGSUSED*/
ed_delete_next_char(el, c)
    EditLine *el;
    int c;
{
#ifdef notdef /* XXX */
#define EL el->el_line
fprintf(stderr, "\nD(b: %x(%s)  c: %x(%s) last: %x(%s) limit: %x(%s)\n", 
	EL.buffer, EL.buffer, EL.cursor, EL.cursor, EL.lastchar, EL.lastchar, EL.limit, EL.limit);
#endif
    if (el->el_line.cursor == el->el_line.lastchar) {/* if I'm at the end */
	if (el->el_map.type == MAP_VI) {
	    if (el->el_line.cursor == el->el_line.buffer) {	
		/* if I'm also at the beginning */
#ifdef KSHVI
		return CC_ERROR;
#else
		term_overwrite(el, STReof, 4);/* then do a EOF */
		term__flush();
		return CC_EOF;
#endif
	    }
	    else  {
#ifdef KSHVI
		el->el_line.cursor--;
#else
		return CC_ERROR;
#endif
	    }
	}
	else {
	    if (el->el_line.cursor != el->el_line.buffer)
		el->el_line.cursor--;
	    else
		return CC_ERROR;
	}
    }
    c_delafter(el, el->el_state.argument);	/* delete after dot */
    if (el->el_line.cursor >= el->el_line.lastchar && el->el_line.cursor > el->el_line.buffer)
	el->el_line.cursor = el->el_line.lastchar - 1;	/* bounds check */
    return CC_REFRESH;
}


/* ed_kill_line(): 
 *	Cut to the end of line
 *	[^K] [^K]
 */
protected el_action_t
/*ARGSUSED*/
ed_kill_line(el, c)
    EditLine *el;
    int c;
{
    char *kp, *cp;

    cp = el->el_line.cursor;
    kp = el->el_chared.c_kill.buf;
    while (cp < el->el_line.lastchar)
	*kp++ = *cp++;		/* copy it */
    el->el_chared.c_kill.last = kp;
    el->el_line.lastchar = el->el_line.cursor; /* zap! -- delete to end */
    return CC_REFRESH;
}


/* ed_move_to_end(): 
 *	Move cursor to the end of line
 *	[^E] [^E]
 */
protected el_action_t
/*ARGSUSED*/
ed_move_to_end(el, c)
    EditLine *el;
    int c;
{
    el->el_line.cursor = el->el_line.lastchar;
    if (el->el_map.type == MAP_VI) {
#ifdef VI_MOVE
	el->el_line.cursor--;
#endif
	if (el->el_chared.c_vcmd.action & DELETE) {
	    cv_delfini(el);
	    return CC_REFRESH;
	}
    }
    return CC_CURSOR;
}


/* ed_move_to_beg(): 
 *	Move cursor to the beginning of line
 *	[^A] [^A]
 */
protected el_action_t
/*ARGSUSED*/
ed_move_to_beg(el, c)
    EditLine *el;
    int c;
{
    el->el_line.cursor = el->el_line.buffer;

    if (el->el_map.type == MAP_VI) {
        /* We want FIRST non space character */
        while (isspace(*el->el_line.cursor)) 
	    el->el_line.cursor++;
	if (el->el_chared.c_vcmd.action & DELETE) {
	    cv_delfini(el);
	    return CC_REFRESH;
	}
    }

    return CC_CURSOR;
}


/* ed_transpose_chars(): 
 *	Exchange the character to the left of the cursor with the one under it
 *	[^T] [^T]
 */
protected el_action_t
ed_transpose_chars(el, c)
    EditLine *el;
    int c;
{
    if (el->el_line.cursor < el->el_line.lastchar) {
	if (el->el_line.lastchar <= &el->el_line.buffer[1])
	    return CC_ERROR;
	else 
	    el->el_line.cursor++;
    }
    if (el->el_line.cursor > &el->el_line.buffer[1]) {
	/* must have at least two chars entered */
	c = el->el_line.cursor[-2];
	el->el_line.cursor[-2] = el->el_line.cursor[-1];
	el->el_line.cursor[-1] = c;
	return CC_REFRESH;
    }
    else 
	return CC_ERROR;
}


/* ed_next_char(): 
 *	Move to the right one character
 *	[^F] [^F]
 */
protected el_action_t
/*ARGSUSED*/
ed_next_char(el, c)
    EditLine *el;
    int c;
{
    if (el->el_line.cursor >= el->el_line.lastchar)
	return CC_ERROR;

    el->el_line.cursor += el->el_state.argument;
    if (el->el_line.cursor > el->el_line.lastchar)
	el->el_line.cursor = el->el_line.lastchar;

    if (el->el_map.type == MAP_VI)
	if (el->el_chared.c_vcmd.action & DELETE) {
	    cv_delfini(el);
	    return CC_REFRESH;
	}

    return CC_CURSOR;
}


/* ed_prev_word(): 
 *	Move to the beginning of the current word
 *	[M-b] [b]
 */
protected el_action_t
/*ARGSUSED*/
ed_prev_word(el, c)
    EditLine *el;
    int c;
{
    if (el->el_line.cursor == el->el_line.buffer)
	return CC_ERROR;

    el->el_line.cursor = c__prev_word(el->el_line.cursor, el->el_line.buffer, 
				      el->el_state.argument, 
				      ce__isword);

    if (el->el_map.type == MAP_VI)
	if (el->el_chared.c_vcmd.action & DELETE) {
	    cv_delfini(el);
	    return CC_REFRESH;
	}

    return CC_CURSOR;
}


/* ed_prev_char(): 
 *	Move to the left one character
 *	[^B] [^B]
 */
protected el_action_t
/*ARGSUSED*/
ed_prev_char(el, c)
    EditLine *el;
    int c;
{
    if (el->el_line.cursor > el->el_line.buffer) {
	el->el_line.cursor -= el->el_state.argument;
	if (el->el_line.cursor < el->el_line.buffer)
	    el->el_line.cursor = el->el_line.buffer;

	if (el->el_map.type == MAP_VI)
	    if (el->el_chared.c_vcmd.action & DELETE) {
		cv_delfini(el);
		return CC_REFRESH;
	    }

	return CC_CURSOR;
    }
    else 
	return CC_ERROR;
}


/* ed_quoted_insert(): 
 *	Add the next character typed verbatim
 *	[^V] [^V]
 */
protected el_action_t
ed_quoted_insert(el, c)
    EditLine *el;
    int c;
{
    int     num;
    char    tc;

    tty_quotemode(el);
    num = el_getc(el, &tc);
    c = (unsigned char) tc;
    tty_noquotemode(el);
    if (num == 1)
	return ed_insert(el, c);
    else
	return ed_end_of_file(el, 0);
}


/* ed_digit(): 
 *	Adds to argument or enters a digit
 */
protected el_action_t
ed_digit(el, c)
    EditLine *el;
    int c;
{
    if (!isdigit(c))
	return CC_ERROR;

    if (el->el_state.doingarg) {	
	/* if doing an arg, add this in... */
	if (el->el_state.lastcmd == EM_UNIVERSAL_ARGUMENT)	
	    el->el_state.argument = c - '0';
	else {
	    if (el->el_state.argument > 1000000)
		return CC_ERROR;
	    el->el_state.argument = 
		(el->el_state.argument * 10) + (c - '0');
	}
	return CC_ARGHACK;
    }
    else {
	if (el->el_line.lastchar + 1 >= el->el_line.limit)
	    return CC_ERROR;

	if (el->el_state.inputmode != MODE_INSERT) {
	    el->el_chared.c_undo.buf[el->el_chared.c_undo.isize++] = 
		*el->el_line.cursor;
	    el->el_chared.c_undo.buf[el->el_chared.c_undo.isize] = '\0';
	    c_delafter(el, 1);  
    	}
	c_insert(el, 1);
	*el->el_line.cursor++ = c;
	el->el_state.doingarg = 0;
	re_fastaddc(el);
    }
    return CC_NORM;
}


/* ed_argument_digit(): 
 *	Digit that starts argument
 *	For ESC-n
 */
protected el_action_t
ed_argument_digit(el, c)
    EditLine *el;
    register int c;
{
    if (!isdigit(c))
	return CC_ERROR;

    if (el->el_state.doingarg) {
	if (el->el_state.argument > 1000000)
	    return CC_ERROR;
	el->el_state.argument = (el->el_state.argument * 10) + (c - '0');
    }
    else {			/* else starting an argument */
	el->el_state.argument = c - '0';
	el->el_state.doingarg = 1;
    }
    return CC_ARGHACK;
}


/* ed_unassigned(): 
 *	Indicates unbound character
 *	Bound to keys that are not assigned
 */
protected el_action_t
/*ARGSUSED*/
ed_unassigned(el, c)
    EditLine *el;
    int c;
{
    term_beep(el);
    term__flush();
    return CC_NORM;
}


/**
 ** TTY key handling.
 **/

/* ed_tty_sigint(): 
 *	Tty interrupt character
 *	[^C]
 */
protected el_action_t
/*ARGSUSED*/
ed_tty_sigint(el, c)
    EditLine *el;
    int c;