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freebsd/lib/libedit/emacs.c
Baptiste Daroussin c1a66a97f9 Synchronize libedit with NetBSD and activate UTF-8 support [1] 
Differences with NetBSD
Reapply our local patches on top of it
Fix Unicode environement detection
Fix reading a line in unicode environment.
It allows /bin/sh to works in UTF-8 envs

Differential Revision:	https://reviews.freebsd.org/D1455
Reviewed by:	jilles, pfg
Obtained from:	NetBSD [1]
MFC after:	1 month
Relnotes:	yes
2015-01-09 07:40:56 +00:00

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/* $NetBSD: emacs.c,v 1.25 2011/07/29 15:16:33 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. 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.
*/
#include "config.h"
#if !defined(lint) && !defined(SCCSID)
#if 0
static char sccsid[] = "@(#)emacs.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: emacs.c,v 1.25 2011/07/29 15:16:33 christos Exp $");
#endif
#endif /* not lint && not SCCSID */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* emacs.c: Emacs functions
*/
#include "el.h"
/* em_delete_or_list():
* Delete character under cursor or list completions if at end of line
* [^D]
*/
protected el_action_t
/*ARGSUSED*/
em_delete_or_list(EditLine *el, Int c)
{
if (el->el_line.cursor == el->el_line.lastchar) {
/* if I'm at the end */
if (el->el_line.cursor == el->el_line.buffer) {
/* and the beginning */
terminal_writec(el, c); /* then do an EOF */
return CC_EOF;
} else {
/*
* Here we could list completions, but it is an
* error right now
*/
terminal_beep(el);
return CC_ERROR;
}
} else {
if (el->el_state.doingarg)
c_delafter(el, el->el_state.argument);
else
c_delafter1(el);
if (el->el_line.cursor > el->el_line.lastchar)
el->el_line.cursor = el->el_line.lastchar;
/* bounds check */
return CC_REFRESH;
}
}
/* em_delete_next_word():
* Cut from cursor to end of current word
* [M-d]
*/
protected el_action_t
/*ARGSUSED*/
em_delete_next_word(EditLine *el, Int c __attribute__((__unused__)))
{
Char *cp, *p, *kp;
if (el->el_line.cursor == el->el_line.lastchar)
return CC_ERROR;
cp = c__next_word(el->el_line.cursor, el->el_line.lastchar,
el->el_state.argument, ce__isword);
for (p = el->el_line.cursor, kp = el->el_chared.c_kill.buf; p < cp; p++)
/* save the text */
*kp++ = *p;
el->el_chared.c_kill.last = kp;
c_delafter(el, (int)(cp - el->el_line.cursor)); /* delete after dot */
if (el->el_line.cursor > el->el_line.lastchar)
el->el_line.cursor = el->el_line.lastchar;
/* bounds check */
return CC_REFRESH;
}
/* em_yank():
* Paste cut buffer at cursor position
* [^Y]
*/
protected el_action_t
/*ARGSUSED*/
em_yank(EditLine *el, Int c __attribute__((__unused__)))
{
Char *kp, *cp;
if (el->el_chared.c_kill.last == el->el_chared.c_kill.buf)
return CC_NORM;
if (el->el_line.lastchar +
(el->el_chared.c_kill.last - el->el_chared.c_kill.buf) >=
el->el_line.limit)
return CC_ERROR;
el->el_chared.c_kill.mark = el->el_line.cursor;
cp = el->el_line.cursor;
/* open the space, */
c_insert(el,
(int)(el->el_chared.c_kill.last - el->el_chared.c_kill.buf));
/* copy the chars */
for (kp = el->el_chared.c_kill.buf; kp < el->el_chared.c_kill.last; kp++)
*cp++ = *kp;
/* if an arg, cursor at beginning else cursor at end */
if (el->el_state.argument == 1)
el->el_line.cursor = cp;
return CC_REFRESH;
}
/* em_kill_line():
* Cut the entire line and save in cut buffer
* [^U]
*/
protected el_action_t
/*ARGSUSED*/
em_kill_line(EditLine *el, Int c __attribute__((__unused__)))
{
Char *kp, *cp;
cp = el->el_line.buffer;
kp = el->el_chared.c_kill.buf;
while (cp < el->el_line.lastchar)
*kp++ = *cp++; /* copy it */
el->el_chared.c_kill.last = kp;
/* zap! -- delete all of it */
el->el_line.lastchar = el->el_line.buffer;
el->el_line.cursor = el->el_line.buffer;
return CC_REFRESH;
}
/* em_kill_region():
* Cut area between mark and cursor and save in cut buffer
* [^W]
*/
protected el_action_t
/*ARGSUSED*/
em_kill_region(EditLine *el, Int c __attribute__((__unused__)))
{
Char *kp, *cp;
if (!el->el_chared.c_kill.mark)
return CC_ERROR;
if (el->el_chared.c_kill.mark > el->el_line.cursor) {
cp = el->el_line.cursor;
kp = el->el_chared.c_kill.buf;
while (cp < el->el_chared.c_kill.mark)
*kp++ = *cp++; /* copy it */
el->el_chared.c_kill.last = kp;
c_delafter(el, (int)(cp - el->el_line.cursor));
} else { /* mark is before cursor */
cp = el->el_chared.c_kill.mark;
kp = el->el_chared.c_kill.buf;
while (cp < el->el_line.cursor)
*kp++ = *cp++; /* copy it */
el->el_chared.c_kill.last = kp;
c_delbefore(el, (int)(cp - el->el_chared.c_kill.mark));
el->el_line.cursor = el->el_chared.c_kill.mark;
}
return CC_REFRESH;
}
/* em_copy_region():
* Copy area between mark and cursor to cut buffer
* [M-W]
*/
protected el_action_t
/*ARGSUSED*/
em_copy_region(EditLine *el, Int c __attribute__((__unused__)))
{
Char *kp, *cp;
if (!el->el_chared.c_kill.mark)
return CC_ERROR;
if (el->el_chared.c_kill.mark > el->el_line.cursor) {
cp = el->el_line.cursor;
kp = el->el_chared.c_kill.buf;
while (cp < el->el_chared.c_kill.mark)
*kp++ = *cp++; /* copy it */
el->el_chared.c_kill.last = kp;
} else {
cp = el->el_chared.c_kill.mark;
kp = el->el_chared.c_kill.buf;
while (cp < el->el_line.cursor)
*kp++ = *cp++; /* copy it */
el->el_chared.c_kill.last = kp;
}
return CC_NORM;
}
/* em_gosmacs_transpose():
* Exchange the two characters before the cursor
* Gosling emacs transpose chars [^T]
*/
protected el_action_t
em_gosmacs_transpose(EditLine *el, Int c)
{
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;
}
/* em_next_word():
* Move next to end of current word
* [M-f]
*/
protected el_action_t
/*ARGSUSED*/
em_next_word(EditLine *el, Int c __attribute__((__unused__)))
{
if (el->el_line.cursor == el->el_line.lastchar)
return CC_ERROR;
el->el_line.cursor = c__next_word(el->el_line.cursor,
el->el_line.lastchar,
el->el_state.argument,
ce__isword);
if (el->el_map.type == MAP_VI)
if (el->el_chared.c_vcmd.action != NOP) {
cv_delfini(el);
return CC_REFRESH;
}
return CC_CURSOR;
}
/* em_upper_case():
* Uppercase the characters from cursor to end of current word
* [M-u]
*/
protected el_action_t
/*ARGSUSED*/
em_upper_case(EditLine *el, Int c __attribute__((__unused__)))
{
Char *cp, *ep;
ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
el->el_state.argument, ce__isword);
for (cp = el->el_line.cursor; cp < ep; cp++)
if (Islower(*cp))
*cp = Toupper(*cp);
el->el_line.cursor = ep;
if (el->el_line.cursor > el->el_line.lastchar)
el->el_line.cursor = el->el_line.lastchar;
return CC_REFRESH;
}
/* em_capitol_case():
* Capitalize the characters from cursor to end of current word
* [M-c]
*/
protected el_action_t
/*ARGSUSED*/
em_capitol_case(EditLine *el, Int c __attribute__((__unused__)))
{
Char *cp, *ep;
ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
el->el_state.argument, ce__isword);
for (cp = el->el_line.cursor; cp < ep; cp++) {
if (Isalpha(*cp)) {
if (Islower(*cp))
*cp = Toupper(*cp);
cp++;
break;
}
}
for (; cp < ep; cp++)
if (Isupper(*cp))
*cp = Tolower(*cp);
el->el_line.cursor = ep;
if (el->el_line.cursor > el->el_line.lastchar)
el->el_line.cursor = el->el_line.lastchar;
return CC_REFRESH;
}
/* em_lower_case():
* Lowercase the characters from cursor to end of current word
* [M-l]
*/
protected el_action_t
/*ARGSUSED*/
em_lower_case(EditLine *el, Int c __attribute__((__unused__)))
{
Char *cp, *ep;
ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
el->el_state.argument, ce__isword);
for (cp = el->el_line.cursor; cp < ep; cp++)
if (Isupper(*cp))
*cp = Tolower(*cp);
el->el_line.cursor = ep;
if (el->el_line.cursor > el->el_line.lastchar)
el->el_line.cursor = el->el_line.lastchar;
return CC_REFRESH;
}
/* em_set_mark():
* Set the mark at cursor
* [^@]
*/
protected el_action_t
/*ARGSUSED*/
em_set_mark(EditLine *el, Int c __attribute__((__unused__)))
{
el->el_chared.c_kill.mark = el->el_line.cursor;
return CC_NORM;
}
/* em_exchange_mark():
* Exchange the cursor and mark
* [^X^X]
*/
protected el_action_t
/*ARGSUSED*/
em_exchange_mark(EditLine *el, Int c __attribute__((__unused__)))
{
Char *cp;
cp = el->el_line.cursor;
el->el_line.cursor = el->el_chared.c_kill.mark;
el->el_chared.c_kill.mark = cp;
return CC_CURSOR;
}
/* em_universal_argument():
* Universal argument (argument times 4)
* [^U]
*/
protected el_action_t
/*ARGSUSED*/
em_universal_argument(EditLine *el, Int c __attribute__((__unused__)))
{ /* multiply current argument by 4 */
if (el->el_state.argument > 1000000)
return CC_ERROR;
el->el_state.doingarg = 1;
el->el_state.argument *= 4;
return CC_ARGHACK;
}
/* em_meta_next():
* Add 8th bit to next character typed
* [<ESC>]
*/
protected el_action_t
/*ARGSUSED*/
em_meta_next(EditLine *el, Int c __attribute__((__unused__)))
{
el->el_state.metanext = 1;
return CC_ARGHACK;
}
/* em_toggle_overwrite():
* Switch from insert to overwrite mode or vice versa
*/
protected el_action_t
/*ARGSUSED*/
em_toggle_overwrite(EditLine *el, Int c __attribute__((__unused__)))
{
el->el_state.inputmode = (el->el_state.inputmode == MODE_INSERT) ?
MODE_REPLACE : MODE_INSERT;
return CC_NORM;
}
/* em_copy_prev_word():
* Copy current word to cursor
*/
protected el_action_t
/*ARGSUSED*/
em_copy_prev_word(EditLine *el, Int c __attribute__((__unused__)))
{
Char *cp, *oldc, *dp;
if (el->el_line.cursor == el->el_line.buffer)
return CC_ERROR;
oldc = el->el_line.cursor;
/* does a bounds check */
cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
el->el_state.argument, ce__isword);
c_insert(el, (int)(oldc - cp));
for (dp = oldc; cp < oldc && dp < el->el_line.lastchar; cp++)
*dp++ = *cp;
el->el_line.cursor = dp;/* put cursor at end */
return CC_REFRESH;
}
/* em_inc_search_next():
* Emacs incremental next search
*/
protected el_action_t
/*ARGSUSED*/
em_inc_search_next(EditLine *el, Int c __attribute__((__unused__)))
{
el->el_search.patlen = 0;
return ce_inc_search(el, ED_SEARCH_NEXT_HISTORY);
}
/* em_inc_search_prev():
* Emacs incremental reverse search
*/
protected el_action_t
/*ARGSUSED*/
em_inc_search_prev(EditLine *el, Int c __attribute__((__unused__)))
{
el->el_search.patlen = 0;
return ce_inc_search(el, ED_SEARCH_PREV_HISTORY);
}
/* em_delete_prev_char():
* Delete the character to the left of the cursor
* [^?]
*/
protected el_action_t
/*ARGSUSED*/
em_delete_prev_char(EditLine *el, Int c __attribute__((__unused__)))
{
if (el->el_line.cursor <= el->el_line.buffer)
return CC_ERROR;
if (el->el_state.doingarg)
c_delbefore(el, el->el_state.argument);
else
c_delbefore1(el);
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;
return CC_REFRESH;
}
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